JP3498249B2 - Capacitor core and capacitor using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

[Industrial applications]

The present invention relates to a capacitor winding core that serves as a capacitor core and a capacitor using the same.

[0002]

[Prior art]

FIG. 8 shows a perspective view of a core body 51 which serves as an axis of a conventional capacitor. A metallized film 52 is wound around the outer periphery of the core body 51 as shown in FIG. Metallic capacitors 53 to be electrodes are formed on both end surfaces of 52 by vapor deposition or the like to form capacitor elements 54.
When a predetermined capacity is obtained by using a large number of capacitor elements 54 formed in this way, a large number of capacitor elements 54 are provided in each core body 51 as shown in FIG.
The capacitor elements 54 were assembled so that their axial directions were parallel to each other, and then the respective capacitor elements 54 were connected.

[0003]

[Problems to be Solved by the Invention]

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

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]

[Means for Solving the Problems]

In view of this, the capacitor core according to claim 1 is a cylindrical core body 1 made of an insulating material in the capacitor core which is the axis of the capacitor element 12 formed by winding the sheet-shaped capacitance forming material 11 on the outer periphery. A connecting portion 2 having an outer diameter slightly smaller than the inner diameter of the core body 1 is formed on one end side of the core body 1, and the connecting portion of the other core body 1a is formed in the other end of one core body 1b. 2 insert the at least two core body 1a, 1b and stackable configured axially, further contact of the core body 1
The connecting part 2 is characterized in that an open part 3 for heat dissipation is formed .

In the capacitor core of claim 2 , 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. It is characterized by

The capacitor core according to claim 3 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 fourth 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 according to claim 5 is the capacitor according to any one of claims 1 to
A sheet-shaped capacitance forming material 11 is wound around the outer circumference of the winding core body 1 formed according to claim 4, and the capacitor element 1 is formed.
It is characterized by configuring 2.

[0010]

[Action]

In the capacitor core according to claim 1, one core body 1 is provided.
By inserting the connecting portion 2 on one end side of a into the other end of the other core body 1b, the two core bodies 1a, 1b in the axial direction can be fitted in a concavo-convex manner. As a result, the core bodies 1a and 1b can be easily stacked on top of each other, and the capacitor element 12 can be easily assembled to improve workability. Moreover, the core book
The opening 3 for heat dissipation is formed in the connecting portion 2 of the body 1.
Even when the core body 1 is laminated, the internal heat is
Heat can be dissipated through the gap formed in
It is possible to prevent the temperature of the part from rising.

In the capacitor core of claim 2 , 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 serves as a guide hole 5 for inserting a bolt. By doing so, even when a plurality of core bodies 1 are axially connected by inserting bolts into the guide holes 5, the core body 1 can be reliably held.

In the capacitor core of the third aspect, since the core body 1 is provided with the guide member 7 having the guide hole 5 for inserting the bolt in the central portion, 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 according to claim 4 , 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 5 , when the core body 1 is used and the sheet-shaped capacitance forming material 11 is wound around the outer periphery of the core body 1 to form the capacitor element 12, a plurality of capacitor elements 12 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.

[0015]

【Example】

Next, specific examples of a capacitor core of the present invention and a capacitor using the same will be described in detail with reference to the drawings. FIG. 1 shows a structure on which the present invention is based.
A cross-sectional view of the core body 1 stacked vertically is shown, and the core body 1 is formed in a cylindrical shape penetrating vertically. Core body 1 made of plastic resin
A cylindrical connecting portion 2 having a one-step smaller diameter is formed on one end side of the. 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 connecting portion of 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 core bodies 1a and 1b can be stacked by press-fitting or loosely fitting 2. That is, by simply fitting the two core main bodies 1a and 1b into concave and convex,
It can be easily stacked in the axial direction of 1b.

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.

[0017] (Example 1) By the way, if the temperature rise in use by stacking a capacitor element there is little but may have a structure as shown in FIG. 1, in the present invention, an internal temperature rise, the heat radiation The structure is as shown in FIG. 2 when it is necessary to do so. 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 2 ) FIG. 3 shows an embodiment 2, in which when a plurality of core bodies 1 (capacitor elements) are connected by fitting in an axial concavo-convex shape, it is necessary to securely hold the whole body, 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 bridge piece 6 is used so that the guide portion 4 is located at the center of the connecting portion 2.
The number of the bridge pieces 6 may be any number, but three or four are preferable examples. In the case of FIG. 3, four bridge pieces 6 are formed, and the outside of the guide portion 4 and the inside of the connecting 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 3 ) 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.

[0020] Note that the connection portion 2 of the core body 1 shown in FIGS. 3 and 4, although not shown the opening 3 as shown in FIG. 2, to form an opening 3.

(Embodiment 4 ) In FIGS. 5 and 6, connecting portions 2 and 8 are formed on both end surfaces of a core body 1, and a guide portion 4 as shown in FIG. It is an example formed in. Core body 1
The outer diameter of the upper piece 9 of the upper part of the upper connecting part 2 is formed to be one step thinner, and the heat releasing openings 3 are formed on both sides of the connecting part 2 in a notched shape. Further, the inner diameter of the lower cylindrical connecting portion 8 is
The connecting portion 2 is formed in such a size that it fits outside the upper piece 9 of the connecting portion 2, and a notch-shaped open portion 10 is formed at the same position as the open portion 3.

FIG. 7 shows the core body 1 (1a, 1 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.

[0023]

【The invention's effect】

As described above, in the capacitor core according to the first aspect, the connection portion on one end side of one core body is inserted into the other end of the other core body, and the two core bodies in the axial direction are fitted in the concavo-convex shape. can do. As a result, the core bodies can be easily stacked and the capacitor element can be easily assembled, which improves workability. Moreover, for heat dissipation in the main part of the connection part of the core body
By forming the open part of the
Even when the internal heat is released through the open part,
It is possible to prevent the temperature from rising.

[0024] In the capacitor winding core of claim 2, formed integrally with a cylindrical guide portion on the inner side of the connecting portion of the core body, that has a guide hole for bolt insertion holes of the guide portion, the guide Even when the plurality of core bodies are axially connected by inserting the bolts into the holes, the core body can be securely held.

In the capacitor core of the third aspect, 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.

[0026] In the capacitor winding core according to claim 4, when axially assembled core body, the recess-projection fitting a second connecting portion of the first connecting portion and the other of the core body of one of the core body 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.

In the capacitor of claim 5 , when 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 are stacked in the prerequisite structure of the present invention.

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

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

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

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

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

FIG. 7 is a cutaway perspective view showing a stacked state of capacitor elements according to a fourth 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 3 Open section 4 Guide section 5 guide holes 7 Guide member 8 connections 10 Open section 11 Film (capacity forming material) 12 Capacitor element

Claims (5)

(57) [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); At least two winding core bodies (1a) and (1b) are configured to be axially stackable , and
An opening for heat dissipation in the connecting part (2) of the core body (1)
(3) Formed capacitor core. 2. A cylindrical guide portion (4) is integrally formed inside the connecting portion (2) of the core body (1), and a hole of this guide portion (4) is used as a guide hole for bolt insertion. (5) The capacitor core according to claim 1, characterized in that. 3. A guide hole (5) for inserting a bolt in the central portion.
A separate guide member (7) provided with the core body (1)
The capacitor core according to claim 1, wherein the core is provided inside. 4. A sheet-shaped capacity 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. 5. A capacitor element (12) is formed by winding a sheet-shaped capacitance forming material (11) around an outer circumference of a winding core body (1) formed according to any one of claims 1 to 4 . Capacitor characterized by that.