Conduit connectors and electrical equipment devices

Abstract

Provided is a conduit connector that can suppress cracks and chips from occurring in a ferrite core. [Solution] A conduit connector (100) for attaching a conduit to the housing of an electrical equipment device, comprising a tubular connector main body (110) to which the conduit is connected, a nut portion (120) fixed to the outer peripheral surface of one end of the connector main body (110), and a ferrite core (130) housed in the nut portion (120), wherein the nut portion (120) comprises an annular first wall portion surrounding the outer peripheral surface of one end of the connector main body (110), an annular second wall portion surrounding the first wall portion while spaced apart from the first wall portion, a connecting portion connecting one end of the first wall portion to one end of the second wall portion, and a retaining portion provided in a hollow portion between the first wall portion and the second wall portion, wherein the ferrite core (130) is disposed in the hollow portion and is retained by the retaining portion so as not to come into contact with the outer peripheral surface of the first wall portion or the inner peripheral surface of the second wall portion.

Description

[Technical Field]

[0001] The present invention relates to a conduit connector and an electrical equipment device including the conduit connector. [Background technology]

[0002] Electrical equipment such as power conditioners are equipped with conduit connectors for attaching electrical conduits such as PF pipes. When implementing EMC measures for such electrical equipment, it is common to either install a filter (coil) on the circuit board inside the electrical equipment, or to install a ferrite core inside the electrical equipment.

[0003] However, since the space inside an electrical device is limited, the size of the housing of the electrical device must be increased to provide space for the filter or ferrite core, and in the case of ferrite cores, the size must be larger the further away from the conduit connector.

[0004] Patent Document 1 describes a structure in which a ferrite core is built into the nut of a conduit connector. The conduit connector described in Patent Document 1 eliminates the need to install a ferrite core inside the electrical device, thereby preventing the housing from becoming larger.

[0005] However, simply incorporating a ferrite core into the nut portion means that most of the external force applied to the nut portion (for example, the external force when tightening the nut portion) is transmitted to the ferrite core, which may cause cracks or chips in the ferrite core. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 11-260645 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a conduit connector and an electrical device that can suppress cracks and chips that occur in the ferrite core. [Means for solving the problem]

[0008] In order to solve the above problems, the electrical conduit connector according to the present invention comprises: 1. A conduit connector for attaching a conduit to an electrical equipment housing, comprising: a cylindrical connector main body to which the electrical conduit is connected; a nut portion fixed to an outer peripheral surface of one end of the connector main body; a ferrite core accommodated in the nut portion, The nut portion is a first wall portion having an annular shape that surrounds the outer peripheral surface of the one end side of the connector main body; a second wall portion having an annular shape and surrounding the first wall portion while being spaced apart from the first wall portion; a connecting portion that connects one end of the first wall portion and one end of the second wall portion; a holding portion provided in a hollow portion between the first wall portion and the second wall portion, The ferrite core is The hollow portion is disposed in the hollow portion and is held by the holding portion so as not to come into contact with the outer peripheral surface of the first wall portion and the inner peripheral surface of the second wall portion.

[0009] In this configuration, the ferrite core is disposed in the hollow portion and held by the holding portion so as not to come into contact with the outer peripheral surface of the first wall portion and the inner peripheral surface of the second wall portion that define the hollow portion. Therefore, with this configuration, external forces transmitted from the nut portion to the ferrite core (for example, external forces when fastening the nut portion) can be alleviated, thereby suppressing cracks and chips from occurring in the ferrite core.

[0010] In the conduit connector, The ferrite core is formed in an annular shape, The holding portion is The ferrite core may be elastically deformable and configured to restrict radial and axial movement of the ferrite core.

[0011] In the conduit connector, The holding portion is a first elastic body that is elastically deformable and restricts radial movement of the ferrite core and movement in one axial direction; The ferrite core may be configured to include a second elastic body that is formed to be elastically deformable and that restricts movement of the ferrite core in the other axial direction.

[0012] In the conduit connector, The first elastic body is a first plate-like elastic body having one end and the other end fixed to the inner circumferential surface of the second wall portion and a central portion spaced apart from the inner circumferential surface of the second wall portion; a hook provided in the central portion, The second elastic body is The second elastic plate may be configured to have one end and the other end fixed to the connecting portion and a central portion spaced apart from the connecting portion.

[0013] In order to solve the above problems, an electrical device according to the present invention comprises: Electrical circuit components; a housing that houses the electrical circuit components; and any one of the above-described conduit connectors for attaching a conduit to the housing. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a conduit connector and an electrical device that can suppress cracks and chips from occurring in the ferrite core. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a front view of an electrical device according to the present invention; [Figure 2]1 is a front view of a conduit connector according to the present invention, showing a state in which a connector body and a nut portion are separated from each other. [Figure 3] 1A is a bottom view of the nut part with a ferrite core disposed therein, and FIG. 1B is a bottom view of the nut part without a ferrite core disposed therein. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. 3(A). [Figure 5] FIG. 4 is a cross-sectional view taken along line BB in FIG. 3(A). DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a conduit connector and an electrical device according to the present invention will be described with reference to the accompanying drawings.

[0017] 1 shows an electric device 1 according to one embodiment of the present invention. The electric device 1 includes an electric circuit component 2, a housing 3, and at least one (three in this embodiment) electric conduit connector 100-1, 100-2, 100-3.

[0018] The electric device 1 is, for example, a power conditioner for a solar power generation system or a power conditioner for a stationary storage battery. The electric device 1 may also be a main body of a V2H (Vehicle to Home) device that supplies battery power of an electric vehicle to a load in a house.

[0019] The electric circuit components 2 include, for example, an AC / DC conversion circuit including a switching element, a DC / DC conversion circuit including a switching element, and a control circuit that controls the AC / DC conversion circuit and the DC / DC conversion circuit.

[0020] The housing 3 houses the electric circuit component 2. The housing 3 may be attached to a wall or may be placed on the ground or the like by attaching legs (not shown). To the bottom plate of the housing 3, a conduit PF1 is attached via a conduit connector 100-1, a conduit PF2 is attached via a conduit connector 100-2, and a conduit PF3 is attached via a conduit connector 100-3.

[0021] In this embodiment, the conduits PF1, PF2, and PF3 are PF pipes. Power line cables and / or communication line cables are housed in the conduits PF1, PF2, and PF3. The power line cables and / or communication line cables drawn into the housing 3 are connected to the electric circuit component 2.

[0022] Conduit connectors 100-1, 100-2, and 100-3 are used to attach conduits PF1, PF2, and PF3 to housing 3. Because conduit connectors 100-1, 100-2, and 100-3 have the same configuration, when there is no particular need to distinguish them, they will be simply referred to as conduit connector 100. Similarly, when there is no particular need to distinguish them, conduits PF1, PF2, and PF3 will be simply referred to as conduit PF.

[0023] As shown in FIG. 2, the conduit connector 100 includes a connector body 110, a nut portion 120, and a ferrite core 130 housed in the nut portion 120.

[0024] The connector main body 110 includes an upper portion 111, a middle portion 112, and a lower portion 113. In this embodiment, the upper portion 111, the middle portion 112, and the lower portion 113 are all formed in a cylindrical shape and are integrally formed.

[0025] Although not shown, a first screw portion (male screw portion) for attaching the nut portion 120 is formed on the outer peripheral surface of the upper portion 111. A flange portion 112a is formed at the upper end of the middle portion 112. An annular gasket 114 is disposed on the upper surface of the flange portion 112a. The lower portion 113 is configured so that the electrical conduit PF can be connected and fixed.

[0026] In this embodiment, when the conduit connector 100 is attached to the housing 3, the bottom plate of the housing 3 is sandwiched between the lower surface of the nut portion 120 and the upper surface of the gasket 114. Note that although the connector main body 110 in this embodiment is a straight connector, it is not limited to this shape and may be, for example, a bent connector in which the middle portion 112 is curved.

[0027] Fig. 3 shows a bottom view of the nut portion 120. In Fig. 3, (A) is a bottom view of the nut portion 120 in a state where the ferrite core 130 is housed therein, and (B) is a bottom view of the nut portion 120 in a state where the ferrite core 130 is not housed therein.

[0028] The ferrite core 130 is an EMC countermeasure and is made of, for example, iron oxide mixed with cobalt, nickel, manganese, etc., baked into a circular shape (porcelain). For this reason, the ferrite core 130 varies greatly in size, and there is a risk of cracking or chipping when subjected to impact.

[0029] The nut portion 120 includes a first wall portion 121, a second wall portion 122, a connecting portion 123, a first elastic body 124, and a second elastic body 125. The first elastic body 124 and the second elastic body 125 correspond to the "retaining portion" of the present invention. The nut portion 120 of this embodiment is made of resin, and its height dimension is smaller than the height dimension of the upper portion 111 of the connector main body 110.

[0030] The first wall portion 121 is formed in an annular shape so as to surround the outer peripheral surface of the upper portion 111. Although not shown in the figure, the inner peripheral surface of the first wall portion 121 is formed with a second screw portion (female screw portion) that screws into a first screw portion (male screw portion) on the outer peripheral surface of the upper portion 111.

[0031] The second wall portion 122 is formed in an annular shape so as to surround the first wall portion 121 while being spaced radially outward from the first wall portion 121. The height dimension of the second wall portion 122 is the same as the height dimension of the first wall portion 121 and is greater than the height dimension of the ferrite core 130.

[0032] The ferrite core 130 is disposed in a hollow portion between the outer peripheral surface of the first wall portion 121 and the inner peripheral surface of the second wall portion 122. In this embodiment, the outer diameter of the first wall portion 121 and the inner diameter of the second wall portion 122 are set in consideration of variations in size of the ferrite core 130 so that the ferrite core 130 does not come into contact with the outer peripheral surface of the first wall portion 121 and the inner peripheral surface of the second wall portion 122.

[0033] The connecting portions 123 connect the upper end portion of the first wall portion 121 to the upper end portion of the second wall portion 122. Specifically, six connecting portions 123 spaced apart in the circumferential direction connect the upper end portion of the first wall portion 121 to the upper end portion of the second wall portion 122. The number of connecting portions 123 may be changed as appropriate depending on the size of the nut portion 120. Below the connecting portions 123, the above-mentioned hollow portion is formed.

[0034] The first elastic bodies 124 are formed to be elastically deformable and restrict movement of the ferrite core 130. Specifically, three first elastic bodies 124 spaced approximately 120° apart in the circumferential direction restrict radial and axial downward movement of the ferrite core 130. The number of first elastic bodies 124 may be changed as appropriate depending on the size of the nut portion 120.

[0035] The first elastic body 124 includes a first elastic plate 124a formed to be elastically deformable, and a hook 124b. One end and the other end of the first elastic plate 124a in the longitudinal direction are fixed to the inner circumferential surface of the second wall portion 122, and a central portion between the one end and the other end is spaced apart from the inner circumferential surface of the second wall portion 122. The central portion contacts the outer circumferential surface of the ferrite core 130 and applies a force to the ferrite core 130 in the radially inward direction. This allows the first elastic plate 124a to restrict radial movement of the ferrite core 130 and absorb any size variations in the ferrite core 130 in the radial direction.

[0036] 4, hook 124b is provided at the lower end of the center portion of first plate-shaped elastic body 124a. Hook 124b is a convex portion that protrudes from first plate-shaped elastic body 124a toward ferrite core 130, and contacts the lower surface of ferrite core 130 to restrict downward axial movement of ferrite core 130.

[0037] The second elastic bodies 125 are formed to be elastically deformable and restrict the upward axial movement of the ferrite core 130. Specifically, as shown in FIG. 3(B), three second elastic bodies 125 spaced apart by approximately 120° in the circumferential direction restrict the upward axial movement of the ferrite core 130. The number of second elastic bodies 125 may be changed as appropriate depending on the size of the nut portion 120. The second elastic bodies 125 correspond to the "second plate-shaped elastic body" of the present invention.

[0038] The second elastic body 125 has one circumferential end fixed to the lower surface of one of the connecting portions 123 and the other circumferential end fixed to the lower surface of the other connecting portion 123 so as to connect two adjacent connecting portions 123. The central portion between the one end and the other end of the second elastic body 125 is displaced axially downward as it approaches the circumferential center. As shown in FIG. 5, this central portion contacts the upper surface of the ferrite core 130 and applies a force to the ferrite core 130 in the axial downward direction. This allows the second elastic body 125 to restrict the axial upward movement of the ferrite core 130 and absorb size variations in the axial direction of the ferrite core 130.

[0039] In this embodiment, the first elastic bodies 124 and the second elastic bodies 125 are arranged alternately in the circumferential direction in the hollow portion between the first wall portion 121 and the second wall portion 122 so that the first elastic bodies 124 and the second elastic bodies 125 do not face each other in a bottom view. This arrangement makes it possible to distribute the force applied to the ferrite core 130 from the first elastic bodies 124 and the second elastic bodies 125.

[0040] The procedure for accommodating the ferrite core 130 into the nut portion 120 will be described below.

[0041] First, the first elastic body 124 is elastically deformed radially outward to ensure a space between the first wall portion 121 and the ferrite core 130 so that the ferrite core 130 can pass through. Then, the ferrite core 130 is inserted into the hollow portion between the first wall portion 121 and the second wall portion 122 from below the nut portion 120. Then, when the ferrite core 130 abuts against the second elastic body 125, the first elastic body 124 is elastically deformed radially inward to abut against the ferrite core 130.

[0042] As a result, as described above, the first elastic body 124 and the second elastic body 125 can hold the ferrite core 130 away from the first wall portion 121 and the second wall portion 122, and the ferrite core 130 can be accommodated in the nut portion 120.

[0043] In the conduit connector 100 according to this embodiment, the ferrite core 130 is housed in the nut portion 120, eliminating the need to install a separate ferrite core inside the housing 3. Therefore, the conduit connector 100 and the electrical device 1 according to this embodiment can implement EMC measures without increasing the size of the housing 3. Furthermore, in this embodiment, the ferrite core 130 is disposed near the entrance and exit points of the power line cable and / or communication line cable to and from the housing 3, thereby enhancing the effectiveness of the EMC measures.

[0044] In the conduit connector 100 according to this embodiment, the ferrite core 130 is held in the hollow portion by the first elastic body 124 and the second elastic body 125, and therefore does not come into contact with the outer peripheral surface of the first wall portion 121 or the inner peripheral surface of the second wall portion 122, regardless of variations in size. Therefore, the conduit connector 100 and the electrical device 1 according to this embodiment can reduce the external force transmitted from the nut portion 120 to the ferrite core 130 (for example, the external force generated when fastening the nut portion 120), thereby preventing cracks or chips from occurring in the ferrite core 130.

[0045] Although the embodiments of the conduit connector and the electrical device according to the present invention have been described above, the present invention is not limited to the above-described embodiments.

[0046] The conduit connector of the present invention is a conduit connector for attaching a conduit to a housing of an electrical equipment device, and includes a cylindrical connector main body to which the conduit is connected, a nut portion fixed to the outer peripheral surface of one end of the connector main body, and a ferrite core housed in the nut portion, wherein the nut portion includes an annular first wall portion surrounding the outer peripheral surface of one end of the connector main body, an annular second wall portion surrounding the first wall portion while being spaced apart from the first wall portion, a connecting portion connecting one end of the first wall portion to one end of the second wall portion, and a retaining portion provided in a hollow portion between the first wall portion and the second wall portion, and the configuration can be modified as appropriate as long as the ferrite core is disposed in the hollow portion and is held by the retaining portion so as not to come into contact with the outer peripheral surface of the first wall portion and the inner peripheral surface of the second wall portion.

[0047] In the above embodiment, the holding portion of the present invention is configured by the first elastic body 124 and the second elastic body 125, but for example, the holding portion may be configured by one of the first elastic body 124 and the second elastic body 125 and another elastic body different from the first elastic body 124 or the second elastic body 125. Furthermore, the shape and attachment position of the one elastic body may be changed.

[0048] In the above embodiment, the holding portions (first elastic body 124 and second elastic body 125) are formed to be elastically deformable, but holding portions that do not elastically deform may also be used. However, by using an elastically deformable holding portion, it is possible to absorb variations in the size of the ferrite core and to reduce the external force transmitted to the ferrite core.

[0049] In the above embodiment, a connecting portion 123 is used to connect the upper end of the first wall portion 121 and the upper end of the second wall portion 122, but a connecting portion may also be used to connect the lower end of the first wall portion 121 and the lower end of the second wall portion 122.

[0050] The configuration of the electrical equipment device according to the present invention can be modified as appropriate, provided that it comprises an electrical circuit component, a housing for accommodating the electrical circuit component, and the electrical conduit connector according to the present invention for attaching an electrical conduit to the housing.

[0051] In the above embodiment, the conduit connector 100 is attached to the bottom plate of the housing 3, but the attachment position of the conduit connector 100 can be changed as appropriate. For example, the attachment position of the conduit connector 100 may be changed to the right side plate, left side plate, or back plate of the housing 3. [Explanation of symbols]

[0052] 1 Electrical equipment 2. Electrical circuit components 3. Housing 100 (100-1, 100-2, 100-3) Conduit Connector 110 Connector body 111 Upper 112 Chubu 112a Flange part 113 Lower 114 Gasket 120 Nut 121 1st wall section 122 2nd wall section 123 Connecting part 124 First Elastic Body 124a First plate-shaped elastic body 124b hook 125 Second Elastic Body 130 Ferrite Core

Claims

1. 1. A conduit connector for attaching a conduit to an electrical equipment housing, comprising: a cylindrical connector main body to which the electrical conduit is connected; a nut portion fixed to an outer peripheral surface of one end of the connector main body; a ferrite core accommodated in the nut portion, The nut portion is a first wall portion having an annular shape that surrounds the outer peripheral surface of the one end side of the connector main body; a second wall portion having an annular shape and surrounding the first wall portion while being spaced apart from the first wall portion; a connecting portion that connects one end of the first wall portion and one end of the second wall portion; a holding portion provided in a hollow portion between the first wall portion and the second wall portion, The ferrite core is The hollow portion is disposed in the hollow portion and is held by the holding portion so as not to come into contact with the outer peripheral surface of the first wall portion and the inner peripheral surface of the second wall portion.

1. A conduit connector comprising:

2. The ferrite core is formed in an annular shape, The holding portion is The ferrite core is elastically deformable and restricts radial and axial movements of the ferrite core.

2. The conduit connector of claim 1.

3. The holding portion is a first elastic body that is elastically deformable and restricts radial movement of the ferrite core and movement in one axial direction; a second elastic body that is formed to be elastically deformable and that restricts movement of the ferrite core in another axial direction.

3. The conduit connector of claim 2.

4. The first elastic body is a first plate-like elastic body having one end and the other end fixed to the inner circumferential surface of the second wall portion and a central portion spaced apart from the inner circumferential surface of the second wall portion; a hook provided in the central portion, The second elastic body is a second elastic plate body having one end and the other end fixed to the connecting portion and a central portion spaced apart from the connecting portion; 4. The conduit connector of claim 3.

5. Electrical circuit components; a housing that houses the electrical circuit components; and the conduit connector according to any one of claims 1 to 4 for attaching a conduit to the housing. An electrical device characterized by:

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