JPH0348646B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel flat electrolytic capacitor, a bus line device comprising a flat electrolytic capacitor, and an electronic circuit device using the bus line device.

An electronic circuit device generally includes a power supply circuit and a plurality of electronic circuits that receive power from the power supply circuit.
For example, an audio amplifier consists of a power supply circuit, a preamplifier, a tone control amplifier, etc., and a power amplifier. The power supply circuit and other electronic circuits are usually connected by lead wires or wiring films on the printed wiring board, and therefore, power is transferred from the power supply circuit to other electronic circuits. Supply is also generally carried out through lead wires or wiring membranes. By the way, since resistance and inductance exist in lead wires or wiring films on printed wiring boards, a distributed constant circuit as shown in Figure 1 is formed in the circuit that supplies power from the power supply circuit to other electronic circuits. Ru. In the same figure
PS is the power supply circuit, PWA and PWA' are the positive and negative halves of the power amplifier, TC and TC' are the positive and negative halves of the tone control circuit, and PRA and PRA' are the preamplifier's positive and negative halves. They are a positive electrode side half and a negative electrode side half. CC and CC are electrolytic capacitors connected between the positive terminal and the ground terminal and between the negative terminal and the ground terminal of the power supply circuit PS for absorbing noise, etc. l ₁ , l ₂ ,...ln are power supply circuits
The inductances r ₁ , r ₂ , . . . rn distributed in the lead wires (or wiring films) connected between the PS and the power amplifiers PWA, PWA' are also resistances.
l ₁ ′, l ₂ ′, ...ln′ and r ₁ ′, r ₂ ′, ...rn′ are power amplifiers
PWA, PWA′ and tone control circuit TC,
These are the inductance and resistance distributed in the lead wire (or wiring film) connected between TC' and the lead wire (or wiring film).
Similarly l ₁ ″, l ₂ ″, …ln″ and resistance r ₁ ″, r ₂ ″, …rn″
are tone control circuits TC, TC′ and preamplifier
This is the inductance and resistance distributed in the lead wire (or wiring film) connected between PRA and PRA'.

By the way, in such an electronic circuit device, first the power supply circuit PS is connected to other electronic circuits PWA,
There is a problem in that noise gets on the lead wires etc. that supply power to the PWA', TC, TC', PRA, PRA', resulting in poor sound quality. Also, noise,
Electrolytic capacitors CC, CC are connected to the power supply circuit PS to absorb ripples, etc., but most of the effect of providing the electrolytic capacitor CC is lost due to the presence of inductance etc. distributed in the lead wires. . Therefore, in the past, as shown in Figure 2, attempts have been made to more completely absorb noise by connecting a large number of electrolytic capacitors CC to cancel inductance at appropriate locations on the power transmission path using lead wires, etc. It was done. but,
In this case, a large number of expensive large-capacity electrolytic capacitors must be used, and the number of man-hours required to assemble the device increases, leading to an increase in the price of the device. Furthermore, providing a large number of electrolytic capacitors increases the size of the device and causes problems such as a decrease in reliability, which is undesirable.

Therefore, the present invention eliminates noise by using a flat electrolytic capacitor as a power supply path.
It ensures the absorption of ripples, etc., and also prevents the intrusion of external noise, unnecessary signals, etc.
Moreover, it is intended to cancel the inductance distributed in the power supply path, and the first one of the present invention is made by laminating one or more pairs of anode foil and cathode foil with electrolytic paper interposed therebetween. The anode foil and the cathode foil are housed in a case made of a slender laminate shield member, and a plurality of pairs of electrode terminals are provided in the case insulated from the case, and are spaced apart along the longitudinal direction of each of the anode foil and the cathode foil. A flat electrolytic capacitor is characterized in that the same number of terminal connection parts as the electrode terminals are connected to the electrode terminals by appropriate means, forming a laminate by laminating one or more pairs of anode foil and cathode foil in which terminal connection pieces are integrally formed at appropriate intervals through electrolytic paper so that the terminal connection pieces do not overlap each other; The laminate is housed in a case made of a shielding material, an electrode terminal insulated from the case is provided corresponding to the terminal connection piece, and the terminal connection piece and the corresponding electrode terminal are connected by appropriate means. These flat electrolytic capacitors are characterized by being electrically connected to each other. Further, in a third aspect of the present invention, a long and narrow laminate obtained by laminating one or more pairs of anode foil and cathode foil via electrolytic paper is housed in a case made of a shielding member, and a plurality of anode foils and cathode foils are stacked in the case. A pair of electrode terminals is provided insulated from the case, and the same number of terminal connection parts as the electrode terminals are connected to the electrode terminals, which are spaced apart along the longitudinal direction of each of the anode foil and the cathode foil. A bus line device comprising flat electrolytic capacitors connected by an appropriate means, and a fourth aspect of the present invention is a bus line device comprising a flat electrolytic capacitor connected by an appropriate means, and a fourth aspect of the present invention is a bus line device comprising one or more pairs of anode foil and cathode foil laminated via electrolytic paper. The elongated laminate made of the above is housed in a case made of a shielding member, and a plurality of pairs of electrode terminals are provided in the case in a state insulated from the case, and the anode foil and the cathode foil are spaced apart along the longitudinal direction of each. A bus line device in which the anode foil and the cathode foil of a flat electrolytic capacitor are connected to the electrode terminals by appropriate means, respectively, and the same number of terminal connection portions as the electrode terminals located at the terminals are connected as bus lines, and a power supply circuit. , one or more electronic circuits supplied with power from the power supply circuit, and each electrode terminal of the bus line device is connected to an output terminal of the power supply circuit and a power supply of the electronic circuit supplied with power from the power supply circuit. This is an electronic circuit device using a bus line device characterized in that it is connected to a terminal.

Hereinafter, the present invention will be described in detail according to embodiments shown in the accompanying drawings.

3 to 6 show an example of the implementation of the flat electrolytic capacitor of the present invention, and FIG. 3 shows an exploded view of the laminate 1 forming the element of the flat electrolytic capacitor. The laminate 1 includes an anode foil 2 and a cathode foil 3 with electrolytic paper 4
It is made by laminating layers with each other. The anode foil 2 and the cathode foil 3 have an elongated shape, and one side edge of each is provided with, for example, four terminal connection pieces 5 ₁ , 5 ₂ , 5 ₃ , 5 ₄ and 6 ₁ , 6 ₂ , which are appropriately spaced from each other. 6 ₃ and 6 ₄ are integrally formed, and the terminal connecting pieces of the anode foil 2 and the cathode foil 3 are connected to each other, that is, the terminal connecting piece 5
₁ , 5 ₂ , 5 ₃ , 5 ₄ and 6 ₁ , 6 ₂ , 6 ₃ , 6 ₄ are laminated with electrolytic paper 4 interposed therebetween in a state where they are appropriately shifted in the longitudinal direction so that they do not overlap each other. This laminate 1 is housed in a metal case 7 as shown in FIG. 8 ₁ , 8 ₂ , 8 ₃ , 8 ₄ are anode terminals of flat electrolytic capacitors, 9 ₁ , 9 ₂ , 9 ₃ , 9 ₄ are cathode terminals, and sleeve-shaped insulating spacers 10 and 9 4 are respectively provided on the side end surface of the case 7. 10, . . . are insulated from the case 7.

The internal structure of the flat electrolytic capacitor will be explained below with reference to FIGS. 5 and 6.

The case 7 that houses the laminate 1 has a dish-shaped main body 11.
A fitting groove 13 is formed on the upper end surface of the peripheral edge of the main body 11, and a fitting protrusion 14 that fits into the fitting groove 13 is formed on the upper end surface of the peripheral edge of the lid body 12.
is formed, and a fitting protrusion 1 is formed in the fitting groove 13.
The case 7 is formed by fitting the main body 11 and the lid body 12 together by welding them to their peripheral edges. Four terminal mounting holes 15 are formed through the side surfaces of the case body 11 and the lid body 12 on the same side, respectively, and the cathode terminals ₉ ，
9 ₂ , 9 ₃ , 9 ₄ are terminal mounting holes 1 of the case lid body 12
5, 15, 15, 15 have anode terminals 8 ₁ , 8 ₂ , 8
₃ , 8 ₄ are the insulating spacers 10, 10,
It is inserted and fixed through...

The laminate 1 is housed inside a case 7 with an anode foil 2 and a cathode foil 3 electrically insulated from the case 7. Terminal connection pieces 5 ₁ , 5 2 , 5 ₃ , 5 ₄ and 6 1 , 6 ₂ , 6 ₃ , _{6 4} of anode foil 2 and cathode foil ₃
On top are current collecting plates 16 ₁ , 16 ₂ , 16 respectively.
₃ , 16 ₄ and 17 ₁ , 17 ₂ , 17 ₃ , 17 ₄ are connected by welding or other means, and the current collecting plates 16 ₁ ,
16 ₂ , 16 ₃ , 16 ₄ have conductor wires 18 ₁ , 1, respectively.
One ends of 8 ₂ , 18 ₃ , 18 ₄ are connected by welding or other means, and current collector plates 17 ₁ , 17 ₂ , 1
7 ₃ , 17 ₄ have conductor wires 19 ₁ , 19 ₂ , 19 ₃ , 19 ₄
one end of which is connected by welding or other means.
The other ends of the conducting wires 19 ₁ , 19 ₂ , 19 ₃ , 19 ₄ are connected to the inside of the anode terminals 8 ₁ , 8 ₂ , 8 ₃ , 8 ₄ and the cathode terminals 9 ₁ , 9 ₂ , 9 ₃ , 9 _{4 .} connected to the end,
Terminal connection pieces 5 ₁ , 5 ₂ , 5 of anode foil 2 and cathode foil 3
₃ , 5 ₄ and 6 ₁ , 6 ₂ , 6 ₃ , 6 ₄ are the conductor wires 18 ₁ ,
18 ₂ , 18 ₃ , 18 ₄ and 19 ₁ , 19 ₂ , 19 ₃ ,
19 ₄ to the corresponding anode terminals 8 ₁ , 8 ₂ , 8 ₃ ,
8 ₄ and cathode terminals 9 ₁ , 9 ₂ , 9 ₃ , and 9 ₄ .

Such a flat electrolytic capacitor 20 is most suitable as a bus line for supplying power from a power supply circuit to other electronic circuits. FIG. 7 shows an example of an electronic circuit device using the flat electrolytic capacitor 20 as described above as a bus line. In the drawing, 21 is a power supply circuit, and its output terminals 22, 22
are connected to the anode terminal 8 ₁ and the cathode terminal 9 ₁ of the flat electrolytic capacitor 20. 23 is a power amplifier whose power terminals 24, 24 are connected to an anode terminal 8 ₂ and a cathode terminal 9 ₂ . 25 is a tone control circuit whose power terminals 26, 26 are connected to an anode terminal 8 ₃ and a cathode terminal 9 ₃ .
Further, 27 is a preamplifier, and its power terminals 28, 2
8 is connected to an anode terminal 8 ₄ and a cathode terminal 9 ₄ .

The flat electrolytic capacitor 20, power supply circuit 21, power amplifier 23, tone control circuit 25, and preamplifier 27 are mounted on a conductive mounting plate 2, for example.
The ground terminals of the power supply circuit 21, power amplifier 23, tone control circuit 25, and preamplifier 27 are electrically connected to the conductive mounting plate 29 by appropriate means, respectively. Furthermore, it is electrically connected to the case 7 of the flat electrolytic capacitor 20 via the mounting plate 29 .

FIG. 8 is a circuit diagram of the electronic circuit device.
In addition, the power amplifier 23 is a differential amplifier DA,
NPN transistor Q1 and PNP transistor Q
The push-pull output circuit consists of two push-pull output circuits.

The differential amplifier DA receives the output signal from the tone control circuit 25 at its non-inverting input terminal, and sends the output signal to the push-pull output circuit. or,
The output signal of the push-pull output circuit is fed back to the inverting input terminal of the differential amplifier. SP is the speaker that is the load of the push-pull output circuit,
CL is a capacitor connected in series to the speaker SP, which serves as the load.

FIG. 9 is an equivalent circuit diagram of the power supply circuit in consideration of the distributed constants of the electronic circuit device shown in FIGS. 7 and 8. In the same figure, l ₁ , l ₂ ,...ln
are the distributed inductances parasitic in the terminal connection pieces 5 ₁ and 6 ₁ to 5 ₂ and 6 ₂ of the anode foil 2 and cathode foil 3 of the flat electrolytic capacitor 20, r ₁ , r ₂ ,...rn
is also the distributed resistance. Further _{, c 1} , _{c 2 ,} . Its l ₁ , l ₂ ...ln, r ₁ , r ₂ ...rn and c ₁ , c ₂
...cn is formed between the power supply circuit 21 and the power amplifier 23. Also, l ₁ ′,
l ₂ ′,…ln′, r ₁ ′, r ₂ ′,…rn and c ₁ ′, c ₂ ′…cn′
are the distributed inductance, distributed resistance, and distributed capacitor distributed in the portion from terminal connection pieces 5 ₂ and 6 ₂ to 5 ₃ and 6 ₃ of the flat electrolytic capacitor 20, and these l ₁ ′, l ₂ ′, ...ln′, r ₁ ′, r ₂ ′, …rn and c ₁ ′, c ₂
'...
A distributed constant circuit consisting of cn' is formed between the power amplifier 23 and the tone control circuit 25. Also, l ₁ ″, l ₂ ″,...ln″, r ₁ ″, r ₂ ″,...rn″ and
c ₁ ′, c ₂ ′…cn′ are 5 ₄ consisting of terminal connection pieces 5 ₃ and 6 ₃
and the inductance distributed in the part leading to 6 ₄ ,
Distributed resistance and distributed capacitor, these l ₁ ″,
l ₂ ″,…ln″, r ₁ ″, r ₂ ″,…rn″ and c ₁ ″, c ₂ ″…cn
'' is the tone control circuit 2.
5 and the preamplifier 27.

In this way, when the flat electrolytic capacitor 20 is used as a bus line device for supplying power from the power supply circuit 21 to each electronic circuit such as the power amplifier 23, distributed inductance is reduced due to the function of the bus line device as a capacitor. can be absorbed. That is, in general, inductance is distributed in lead wires, printed wiring films, etc., and therefore, even if a large capacitor that absorbs ripples and noise is connected to the line that supplies power from the power supply device to the electronic circuit, the Most of the effect of providing a capacitor is lost due to the distributed inductance. Therefore, in order to more completely absorb noise and the like, it is necessary to connect a large number of electrolytic capacitors to the power supply line at intervals. However, as described above, when the anode foil 2 and the cathode foil 3 of the flat electrolytic capacitor 20 are used as a bus line to supply power, the anode foil 2 and the cathode foil 3
Since the capacitance is evenly distributed between the bus lines, it is possible to cancel the distributed inductance and absorb noise and the like. Therefore,
There is no need to provide many capacitors to absorb noise and the like. Therefore, the cost and size of the device can be reduced.

Furthermore, since the laminate 1 forming the element of the flat electrolytic capacitor 20 is housed in a case 7 made of a conductive material, the anode foil 2 and the anode can be connected to the ground line of the electronic circuit device by connecting the case 7 to the ground line of the electronic circuit device. Foil 2 and electrostatic shielding can be used. Therefore, insertion of external noise into the bus line can be more completely prevented.

As mentioned above, the first aspect of the present invention is
An elongated laminate consisting of one or more pairs of anode foil and cathode foil laminated via electrolytic paper is housed in a case made of a shielding member, and multiple pairs of electrode terminals are insulated from the case. The anode foil and the cathode foil are provided with the same number of terminal connection parts as the electrode terminals, which are spaced apart along the longitudinal direction of each of the anode foil and the cathode foil, and are connected to the electrode terminals by appropriate means. It is a flat electrolytic capacitor, in which multiple locations spaced apart along the length of the anode foil and cathode foil serve as terminal connection portions, and each connection portion and its corresponding electrode terminal are electrically connected. Therefore, by connecting the terminals of each electronic circuit to each electrode terminal, the anode foil and the cathode foil can be used as a bus line. A second aspect of the present invention includes a pair or a plurality of pairs of anode foil and cathode foil in which terminal connection pieces are integrally formed at appropriate intervals on one side edge, and the terminal connection pieces overlap each other through electrolytic paper. the laminated body is housed in a case made of a shielding material, and an electrode terminal insulated from the case is provided in the case corresponding to the terminal connecting piece; and corresponding electrode terminals are electrically connected to each other by appropriate means, and the anode foil and cathode foil are shifted so that the terminal mounting pieces do not overlap each other. Since they are laminated, the anode foil and the cathode foil can have exactly the same shape and size. Therefore, there is no need to form the anode foil and the cathode foil separately, and the number of manufacturing steps can be reduced.

A third aspect of the present invention is a bus line device characterized in that the anode foil and cathode foil of the flat electrolytic capacitor as described above are used as the bus line,
The anode foil and cathode foil forming the bus line are housed in a case made of a conductive material. Therefore, the bus line can be electrostatically shielded from the outside of the case. Therefore, it is possible to prevent noise from outside the case from getting onto the bus line. or,
The distributed inductance distributed between the anode foil and the cathode foil forming the bus line can be canceled by the capacitance between the anode foil and the cathode foil, and noise can be absorbed. Therefore, it is possible to eliminate the need to provide a large number of capacitors on the bus line.

A fourth aspect of the present invention includes the above-described bus line device, a power supply circuit, and an electronic circuit that receives power from the power supply circuit, and the power supply circuit is connected to each electrode terminal of the bus line device. This is an electronic circuit device using a bus line device, characterized in that the output terminal of the power supply circuit and the electrode terminal of an electronic circuit that receives power supply from the power supply circuit are connected. Therefore,
There is no risk of noise entering the electronic circuit through the bus line device, and the performance of the electronic circuit device can be improved.

In the above embodiments, the laminate of the flat electrolytic capacitor is made by laminating a pair of anode foil and a cathode foil with electrolytic paper interposed therebetween. The capacitance per unit area of the electrolytic capacitor may be increased. In this way, the range of cases in which the capacitance per unit length of the flat electrolytic capacitor must be set to a certain value can be narrowed, thereby realizing miniaturization of the flat electrolytic capacitor. can.

Further, in the above embodiment, the anode foil 2 and the cathode foil 3
and electrode terminals 8 ₁ , 8 ₂ , 8 ₃ , provided in the case.
Connections with 8 ₄ , 9 ₁ , 9 ₂ , 9 ₃ , 9 ₄ are made using tongue-shaped terminal connection pieces 5 ₁ , 5 ₂ , on one side edge of the anode foil and cathode foil.
5 ₃ , 5 ₄ and 6 ₁ , 6 ₂ , 6 ₃ , 6 ₄ are integrally formed,
The terminal connection pieces 5 ₁ , 5 ₂ , 5 ₃ , 5 ₄ and 6 ₁ , 6 ₂ ,
6 ₃ , 6 ₄ and electrode terminals 8 ₁ , 8 ₂ , 8 ₃ , 8 ₄ and 9
₁ , 9 ₂ , 9 ₃ , and 9 ₄ through conductive wires 18 and 19. However, the terminal connection pieces 5 are attached to the side edges of the anode foil 2 and cathode foil 3.
₁ , 5 ₂ , 5 ₃ , 5 ₄ and 6 ₁ , 6 ₂ , 6 ₃ , 6 ₄ are not necessarily required. That is, for example, the side edge of the anode foil 2 on the electrode terminal 8 side is made to protrude beyond the electrolytic paper 4 above it, the side edge of the cathode foil 3 on the electrode terminal 9 side is made to protrude from the anode foil 2, and the anode Appropriate locations on the side edges of the foil 2 and cathode foil 3 and electrode terminals 8 ₁ , 8 ₂ , 8 ₃ , 8 ₄ and 9 ₁ , 9 ₂ , 9 ₃ , 9 ₄
If these are connected by conductive wires 18, 19, etc., it is not necessary to provide terminal connection pieces 5, 6. The present invention can be carried out in such an embodiment, and the term "terminal connection part" as used herein refers to the part of the anode foil and the cathode foil that is connected to the electrode terminal, and refers to the part of the terminal connection piece. It is not limited to those specially provided for terminal connection.

As described above, what is shown in the attached drawings is merely an embodiment of the present invention, and the present invention can be modified in various ways, and the present invention is not limited to what is shown in the attached drawings. It is not something that will be done.

[Brief explanation of drawings]

FIGS. 1 and 2 are distributed constant circuit diagrams of conventional separate circuits that supply power from a power supply circuit to other electronic circuits, and FIGS. 3 to 6 show examples of implementation of the flat electrolytic capacitor of the present invention. Fig. 3 is an exploded perspective view of a laminate, Fig. 4 is a reduced perspective view of a flat electrolytic capacitor, Fig. 5 is a sectional view taken along line 5-5 in Fig. 4, and Fig. 6 is a sectional view of the A sectional view taken along the line 6-6 in the figure, and FIGS. 7 to 9 show an electronic circuit device using the flat electrolytic capacitor of the present invention as a bus line device, and FIG. 7 is a perspective view showing the main parts. FIG. 8 is a circuit diagram showing a power supply circuit from a power supply circuit of an electronic circuit device to another electronic circuit, and FIG. 9 is a distributed constant circuit diagram of the circuit shown in FIG. Explanation of symbols, 1... Laminate, 2... Anode foil, 3
... Cathode foil, 4 ... Electrolytic paper, 5, 6 ... Terminal connection part (terminal connection piece), 7 ... Case, 8, 9 ... Electrode terminal, 20 ... Flat electrolytic capacitor, 21 ...
Power supply circuit, 22... Output terminal, 23, 25, 27
...Electronic circuit, 24, 26, 28...Power terminal.

Claims (1)

[Claims] 1. An elongated laminate formed by laminating one or more pairs of anode foil and cathode foil through electrolytic paper is housed in a case made of a shielding member, and a plurality of pairs of electrode terminals are placed in the case. are provided insulated from the case, and the same number of terminal connection parts as the electrode terminals are connected to the electrode terminals by appropriate means, respectively, and are spaced apart from each other along the longitudinal direction of the anode foil and the cathode foil. A flat electrolytic capacitor characterized by being connected. 2 A pair or a plurality of anode foils and cathode foils having terminal connecting pieces integrally formed at appropriate intervals on one side edge are laminated with electrolytic paper interposed therebetween so that the terminal connecting pieces do not overlap each other. the laminate is housed in a case made of a shielding material, an electrode terminal insulated from the case is provided corresponding to the terminal connection piece, and the terminal connection piece and the corresponding electrode terminal are provided in the case. A flat electrolytic capacitor characterized by being electrically connected to each other by an appropriate means. 3. An elongated laminate consisting of one or more pairs of anode foil and cathode foil laminated via electrolytic paper is housed in a case made of a shielding member, and multiple pairs of electrode terminals are insulated from the case. from a flat electrolytic capacitor, in which the same number of terminal connection parts as the electrode terminals are connected to the electrode terminals by appropriate means, and are spaced apart from each other along the longitudinal direction of the anode foil and the cathode foil. A bus line device characterized in that the anode foil and the cathode foil are used as a bus line. 4. An elongated laminate consisting of one or more pairs of anode foil and cathode foil laminated via electrolytic paper is housed in a case made of a shielding member, and multiple pairs of electrode terminals are insulated from the case. A flat electrolytic capacitor in which the same number of terminal connection parts as the electrode terminals, which are spaced apart along the longitudinal direction of each of the anode foil and the cathode foil, are connected to the electrode terminals by appropriate means. It consists of a bus line device with an anode foil and a cathode foil as bus lines, a power supply circuit, and one or more electronic circuits that receive power from the power supply circuit, and the power supply is connected to each electrode terminal of the bus line device. An electronic circuit device using a bus line device, characterized in that an output terminal of the circuit is connected to a power supply terminal of an electronic circuit that receives power from the power supply circuit.