JPH0831688A - Capacitor winding core and capacitor using it - Google Patents

Abstract

PURPOSE:To provide a capacitor winding core which can be easily piled up, facilitate the assembling of a capacitor element to enhance workability. CONSTITUTION:A cylindrical connecting part 2 made finer by one step is formed in one end side of a winding core main body 1. The outer diameter of the the connecting part 2 is made slightly finer diameter than the inner diameter of the winding core main body 1. The connecting part 2 of the lower winding core aim body 1b is pressed or inserted into the other end of the upper winding core main body 1a to be able to pile up the upper and lower winding core main bodies 1a, 1b. Namely, the winding core main bodies 1a, 1b can be easily piled up in the axial direction of the two winding core main bodies 1a, 1b by the simple fitting with irregularities of the two winding core main bodies 1a, 1b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitor winding core which serves as a capacitor core and a capacitor using the same.

[0002]

2. Description of the Related Art FIG. 8 is a perspective view of a core body 51 which serves as an axis of a conventional capacitor, and a metallized film 52 is formed on the outer periphery of the core body 51 as shown in FIG. A capacitor element 54 is formed by winding and forming metallikons 53 to be electrodes on both end surfaces of the film 52 by vapor deposition or the like.
Is formed. Then, in the case where a predetermined capacitance is obtained by using a large number of capacitor elements 54 formed in this way, as shown in FIG.
Were assembled so that the axial directions of the respective core bodies 51 were parallel to each other, and then the respective capacitor elements 54 were connected.

[0003]

In the conventional example, when assembling a large number of capacitor elements 54, the core body 51 is assembled in parallel, so that the assembly itself is not easy and the assembly workability is very poor. was there.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and its purpose is to facilitate stacking of capacitor cores with each other, to assemble capacitor elements easily and to improve workability. (EN) Provided is a capacitor winding core and a capacitor using the same.

[0005]

SUMMARY OF THE INVENTION Therefore, the capacitor core according to claim 1 is an insulator in a capacitor core which serves as an axis core of a capacitor element 12 formed by winding a sheet-shaped capacitance forming material 11 on the outer periphery. Is formed on one end side of the cylindrical core body 1 and has a connecting portion 2 having an outer diameter slightly smaller than the inner diameter of the core body 1, and the other end is formed in the other end of one core body 1b. It is characterized in that at least two core bodies 1a and 1b can be stacked axially by inserting the connecting portion 2 of the core body 1a.

The capacitor core according to claim 2 is characterized in that the connection part 2 of the core body 1 is formed with an opening 3 for heat radiation.

Further, in the capacitor core of claim 3, a cylindrical guide portion 4 is integrally formed inside the connecting portion 2 of the core body 1, and the hole of the guide portion 4 is a guide hole for inserting a bolt. The feature is that it is set to 5.

The capacitor core of claim 4 is characterized in that the core body 1 is provided with a separate guide member 7 having a guide hole 5 for inserting a bolt in the center thereof.

According to a fifth aspect of the present invention, there is provided a capacitor core, which is an axial core of a capacitor element 12 formed by winding a sheet-shaped capacitance forming material 11 on an outer periphery of the capacitor core. The core body 1 is provided on one end side of the body 1.
The first connecting portion 2 having a slightly smaller outer diameter is formed, and the second connecting portion 8 is formed on the other end side so that the first connecting portion 2 and the first connecting portion 2 are fitted in a concavo-convex shape. A tubular guide portion 4 having a guide hole 5 for inserting a bolt is integrally formed inside the first connecting portion 2 of the main body 1, and the first connecting portion 2 has a first open portion for heat dissipation. 3 is formed, and a second opening 10 that opens substantially similarly to the first opening 3 is formed in the second connecting portion 8, and at least two connecting portions 2 and 8 are fitted by concavo-convex. The core bodies 1a and 1b are characterized by being stackable in the axial direction.

The capacitor of claim 6 is the same as in claim 1
A capacitor element 12 is configured by winding a sheet-shaped capacitance forming material 11 around the outer periphery of the core body 1 formed in claim 5.

[0011]

In the capacitor core according to claim 1, the connecting portion 2 on one end side of one core body 1a is inserted into the other end of the other core body 1b so as to form two core bodies 1a in the axial direction. 1b can be fitted in concave and convex. Thereby, the core body 1a,
1b can be easily stacked on top of each other, and the capacitor element 12 can be easily assembled to improve workability.

In the capacitor core according to the second aspect of the present invention, since the open portion 3 for radiating heat is formed in the connecting portion 2 of the core body 1, even when the core bodies 1 are stacked, the internal heat is Heat can be dissipated through the gap formed in the laminated part and the open part 3,
It is possible to prevent the internal temperature from rising.

Further, in the capacitor core of claim 3, a cylindrical guide portion 4 is integrally formed inside the connecting portion 2 of the core body 1, and the hole of the guide portion 4 is used as a guide hole 5 for inserting a bolt. By doing so, even when the plurality of core bodies 1 are axially connected by inserting the bolts into the guide holes 5, the core body 1 can be reliably held.

In the capacitor core according to claim 4, since the core member 1 is provided with the guide member 7 having the guide hole 5 for inserting the bolt in the central portion thereof, a plurality of core bodies 1 are connected. When it is necessary to securely hold each core body 1, the core body 1 can be easily held only by using the guide member 7 as a separate component. Further, when the guide member 7 is unnecessary, the cost can be reduced accordingly.

In the capacitor core of claim 5, when the core body 1 is assembled in the axial direction, the first core body 1b of the one core body 1b is assembled.
The two core bodies 1a and 1b can be easily assembled in the axial direction only by fitting the connection portion 2 of the above and the second connection portion 8 of the other core body 1a in a concavo-convex manner.
It is easy to assemble and has good workability. Further, the open portions 3 and 10 can radiate the internal heat when the core bodies 1 are stacked, so that the internal temperature rise can be prevented.

In the capacitor of claim 6, when the core body 1 is used and the sheet-shaped capacitance forming material 11 is wound around the core body 1 to form the capacitor element 12, a plurality of capacitors are formed. Even when the capacitor element 12 is assembled in the axial direction of the core body 1, the assembly can be easily performed. Also, when the capacitor element 12 is assembled, heat can be dissipated through the open portion, and the internal temperature rise can be prevented. Further, the capacitor element 12 assembled by the bolt can be securely held through the guide hole 5.

[0017]

EXAMPLES Specific examples of the capacitor core of the present invention and capacitors using the same will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional view of a state in which the winding core bodies 1 are vertically stacked, and the winding core body 1 is formed in a cylindrical shape penetrating vertically. On the one end side of the core body 1 made of plastic resin, a cylindrical connecting portion 2 having a one-step smaller diameter is formed. The outer diameter of the connecting portion 2 is formed to be slightly smaller than the inner diameter of the core body 1, and the lower core body 1b is provided in the other end of the upper core body 1a as shown in FIG.
The upper and lower winding core bodies 1 by press-fitting or loosely fitting the connecting portions 2 of
It is possible to stack a and 1b.
That is, the two core bodies 1a and 1b can be easily stacked in the axial direction of the core bodies 1a and 1b by simply fitting the two core bodies 1a and 1b into each other.

Therefore, when a plurality of layers of film are wound around the core body 1 to form a capacitor element as in the conventional example, and when a large number of these capacitor elements are assembled, at least two core bodies 1 are arranged in the axial direction. It becomes possible to connect the above, and as a result, the assembling of a plurality of capacitor elements becomes easy and the workability is greatly improved.

(Embodiment 2) By the way, in the case where there is not much temperature rise during use by stacking capacitor elements, the structure shown in FIG.
Although it may be a structure as shown in, there is an internal temperature rise,
When it is necessary to radiate heat, the structure is as shown in FIG. That is, a notched window-shaped opening 3 is formed in the connecting portion 2 of the winding core body 1, and the heat generated inside is radiated through the gap formed in the opening 3 and the laminated portion to stack them. In this case, the temperature inside the core body 1 is prevented from rising. Although FIG. 2 shows the case where only one opening 3 is formed, it is of course possible to form two or more, and the lateral width of the opening 3 can be arbitrarily formed according to the number.

(Embodiment 3) FIG. 3 shows Embodiment 3, in which a plurality of core bodies 1 (capacitor elements) are axially fitted to each other by concavo-convex fitting and must be securely held as a whole. A bolt is used as the means. Therefore, in this embodiment, the cylindrical guide portion 4 is integrally formed in the connecting portion 2 of the winding core body 1 via the bridge piece 6. That is, the guide portion 4 is supported by the bridge piece 6 so that the guide portion 4 is located at the central portion of the connecting portion 2.
The number of bridge pieces 6 may be any number, but three or four
A book is a suitable example. In addition, in the case of FIG.
This is the case of main formation, and the outside of the guide portion 4 and the inside of the connection portion 2 are bridged in a cross shape. A hole inside the guide portion 4 is used as a guide hole 5, and a bolt is inserted into the guide hole 5 to hold and fix a plurality of core bodies 1. The diameter of the guide hole 5 may be such that the bolt can be inserted loosely, or the diameter can be such that the bolt can be inserted properly.

(Embodiment 4) In the embodiment shown in FIG. 3, the guide portion 4 was formed integrally with the core body 1, but in this embodiment, as shown in FIG. It is configured as a separate part from the main body 1. That is, the guide member 7 having the guide hole 5 drilled in the central portion is made of plastic resin similarly to the core body 1, and is formed into a flat bottomed cylindrical shape. Then, a plurality of core bodies 1 axially connected by inserting bolts into the guide holes 5 in the central portion can be securely held. The guide member 7 is inserted or press-fitted in the core body 1, and may be fixed by adhesion at an appropriate position. Moreover, since the guide member 7 is formed as a separate component particularly when not fixed with bolts, the guide member 7 is not necessary, and the cost can be reduced accordingly.

Although the open portion 3 as shown in FIG. 2 is not formed in the connecting portion 2 of the core body 1 shown in FIGS. 3 and 4, the open portion 3 may be formed.

(Embodiment 5) FIGS. 5 and 6 show that the connecting portions 2 and 8 are formed on both end surfaces of the winding core body 1, respectively.
This is an embodiment in which a guide portion 4 as shown in FIG. The outer diameter of the upper piece 9 of the upper part of the connection part 2 on the upper side of the core body 1 is formed to be one step smaller, and the open parts 3 for heat dissipation are formed on both sides of the connection part 2 in a notched shape. Further, the inner diameter of the lower cylindrical connecting portion 8 is formed in such a size that it fits on the outside of the upper piece 9 of the connecting portion 2, and the notch-like opening portion 10 is provided at the same position as the opening portion 3. Are formed respectively.

FIG. 7 shows the core body 1 (1a, 1a shown in FIG. 6).
This shows a state in which the metallized film 11 is wound around the outer periphery of b) in multiple layers to form the capacitor element 12, and two capacitor 12 are vertically stacked. Here, when the core body 1 (capacitor element 12) is stacked in the axial direction,
The connecting portion 8 of the upper core body 1a fits on the outer surface of the upper piece 9 of the connecting portion 2 of the lower core body 1b, and the connecting portion 8
The peripheral end surface of the contact portion abuts on the surface of the stepped portion 13 (see FIG. 6) of the connection portion 2 and is positioned. Further, when the core main bodies 1a and 1b are fitted and recessed to be stacked, the upper and lower open portions 3 and 10 are connected so as to be aligned with each other. Even when the upper and lower open portions 3 and 10 are not aligned, the peripheral end surface of the connecting portion 8 of the core body 1a comes in contact with the surface of the step portion 13 of the lower core body 1b, so that it is below the step portion 13. Since the open portion 3 is opened, the open portion 3 is not entirely closed. Therefore, when the core bodies 1a and 1b are vertically assembled, even if the core body 1 is displaced in the circumferential direction, there is no particular problem because a part of the opening portion 3 is opened. In FIG. 7, reference numeral 14 is a metallikon that serves as an electrode similar to the conventional one.

[0025]

As described above, in the capacitor core according to the first aspect, the two cores in the axial direction are obtained by inserting the connecting portion on one end side of one core body into the other end of the other core body. The main body can be fitted in concavo-convex. As a result, the core bodies can be easily stacked and the capacitor element can be easily assembled, which improves workability.

Further, in the capacitor core according to the present invention, since the open portion for heat radiation is formed in the main part of the connecting portion of the core body, the internal heat is released even when the core bodies are laminated. The heat can be dissipated through and the internal temperature rise can be prevented.

Further, in the capacitor core according to claim 3, a cylindrical guide portion is integrally formed inside the connection portion of the core body, and the hole of the guide portion serves as a guide hole for bolt insertion. Even when the plurality of core bodies are axially connected by inserting the bolts into the guide holes, the core body can be reliably held.

In the capacitor core according to the present invention, since the core body is provided with the guide member having the guide hole for inserting the bolt in the central portion, each core body is connected when a plurality of core bodies are connected. When it is necessary to securely hold the core body, the core body can be easily held only by using a guide member as a separate component. Further, when the guide member is unnecessary, the cost can be reduced accordingly.

In the capacitor core according to the fifth aspect, when the core body is assembled in the axial direction, the first connecting portion of one core body and the second connecting portion of the other core body are fitted in a concavo-convex shape. Simply, the two core bodies can be easily assembled in the axial direction,
Therefore, the capacitor element can be easily assembled and the workability is good. Further, the internal portion can radiate the internal heat when the core main bodies are stacked by the open portion, and the internal temperature rise can be prevented.

According to a sixth aspect of the present invention, in the case where the core body is used and a sheet-shaped capacitance forming material is wound around the core body to form a capacitor element, a plurality of capacitor elements are wound. Assembly is easy even when assembling in the axial direction of the lead body. Also, when the capacitor element is assembled, heat can be dissipated through the open portion and the internal temperature rise can be prevented. Further, the capacitor element assembled by the bolt can be securely held through the guide hole.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which core bodies according to an embodiment of the present invention are stacked.

FIG. 2 is a perspective view of a main part of a winding core body according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a winding core body according to a third embodiment of the present invention.

FIG. 4 is a sectional view of a winding core body according to a fourth embodiment of the present invention.

FIG. 5 is a plan view of a winding core body according to a fifth embodiment of the present invention.

FIG. 6 is a perspective view of a winding core body according to a fifth embodiment of the present invention.

FIG. 7 is a cutaway perspective view showing a stacked state of capacitor elements according to a fifth embodiment of the present invention.

FIG. 8 is a perspective view of a core body of a conventional example.

FIG. 9A is a cross-sectional view of a conventional capacitor element. (B) is a longitudinal sectional view of a conventional capacitor element.

FIG. 10 is a perspective view showing a state in which a conventional capacitor element is assembled.

[Explanation of symbols]

 1 core body 1a core body 1b core body 2 connection part 3 open part 4 guide part 5 guide hole 7 guide member 8 connection part 10 open part 11 film (capacity forming material) 12 capacitor element

Claims (6)

[Claims] 1. A sheet-shaped capacitance-forming material (11) on the outer periphery.
In a capacitor core which is a shaft core of a capacitor element (12) formed by winding a coil, a cylindrical core body (1) made of an insulating material is provided on one end side of an inner diameter of the core body (1). Forming a connection part (2) having a slightly smaller outer diameter, and inserting the connection part (2) of the other core body (1a) into the other end of the one core body (1b); A capacitor core, wherein at least two core bodies (1a) and (1b) are axially stackable. 2. The capacitor core according to claim 1, wherein an opening portion (3) for heat dissipation is formed in the connecting portion (2) of the core body (1). 3. A cylindrical guide portion (4) is integrally formed inside the connection portion (2) of the core body (1), and the hole of this guide portion (4) is a guide hole for bolt insertion. (5) The capacitor core according to claim 1 or 2, characterized in that. 4. A guide hole (5) for inserting a bolt in the central portion.
A separate guide member (7) provided with the core body (1)
Claim 1 or Claim 2 provided in the inside.
Capacitor core. 5. A sheet-shaped capacitance forming material (11) on the outer periphery.
A capacitor core, which serves as a shaft core of a capacitor element (12) formed by winding a coil, is provided on one end side of a cylindrical core body (1) made of an insulator and slightly thinner than the core body (1). Forming a first connecting portion (2) having an outer diameter of the diameter, and forming a second connecting portion (8) on the other end side, which engages with the first connecting portion (2) in a concavo-convex manner; First of the core body (1)
Guide holes (5) for inserting bolts inside the connection part (2)
A tubular guide portion (4) provided with is integrally formed, and a first opening portion (3) for heat dissipation is formed in the first connection portion (2), and the first opening portion (4) is formed. A second opening portion (10) that opens substantially similarly to 3) is formed in the second connection portion (8), and at least two winding core bodies ( A capacitor core, wherein 1a) and 1b) can be laminated in the axial direction. 6. A sheet-shaped capacity forming material (11) on the outer circumference of the winding core body (1) formed according to any one of claims 1 to 5.
A capacitor characterized in that a capacitor element (12) is formed by winding.