JP5538659B2 - Output terminal of electrical equipment - Google Patents

Description

  The present invention relates to an output terminal of an electric device, and more particularly to an output terminal of an in-vehicle insulated switching power supply device.

  As an insulation type switching power supply device mounted on an electric vehicle or a hybrid car, for example, an insulation type DC / DC converter device for converting a DC voltage level is known. An insulation type DC / DC converter device performs an operation of stepping down a high voltage supplied from a driving battery represented by a lithium ion battery to a low voltage that is a power supply voltage of an auxiliary electrical component while maintaining insulation. It is.

  As an output terminal of an insulation type DC / DC converter device, conventionally, a molded part in which a conductive part such as a collar provided with a bolt or a female screw is inserted into an insulating resin member has been widely used. Moreover, as shown in Patent Document 1, a harness is generally used for connection between an output terminal of an insulated switching power supply device and an auxiliary electric system component of an automobile.

JP 2008-193759 A

  However, there are various positions and orientations when the insulated switching power supply device is mounted on the vehicle, and it is easy to regulate the degree of freedom of the harness connected from the vehicle side. In order to ensure the freedom of harness handling, it is necessary to support mounting from various directions and angles at the output terminal. The number of man-hours for durability evaluation and the like increased, and the work was complicated.

  The present invention has been made in order to solve the above-described problems, and obtains an output terminal of an electrical device that can secure the degree of freedom of harness handling and can be attached to the harness from various directions. With the goal.

The output terminal of the electrical device according to the present invention has a bolt having an output side screw part at one end and an input side screw part at the other end, an annular part into which the bolt is inserted, and a part of the outer peripheral surface of the annular part outward. and a resin component having an extended fixed portion, input-side threaded portion is connected to the internal components through a through hole provided in the housing of the electrical equipment inside the housing, the output-side threaded portion housing An output terminal of an electrical device that is disposed outside the wire and connected to an external device via a harness, and a resin component fixing portion includes a flat plate portion parallel to the outer surface of the housing, and the flat plate portion in the axial direction of the bolt A first fixing screw hole penetrating in a direction parallel to the first fixing screw hole, and the fixing screw is fastened to the second fixing screw hole provided in the casing through the first fixing screw hole. is fixed to the outer surface of the body, the annular portion of the resin component, for the first fixing screw at the end of its outer peripheral surface And it has a canopy shaped guide to prevent contact projecting harness and the fixing screws to a portion adjacent the output side screw portion side.

According to the output terminal of the electrical device according to the present invention, the contact between the harness and the fixing screw can be prevented by providing the hook-shaped guide only on the necessary portion on the output side screw portion side of the resin component. Since the degree of freedom of harness handling is ensured, the harness can be attached from various directions.

It is a disassembled perspective view which shows the output terminal of the insulation type switching power supply device which concerns on Embodiment 1 of this invention. It is a front view which shows the output terminal of the insulation type switching power supply device which concerns on Embodiment 1 of this invention. It is a side view which shows the output terminal of the insulation type switching power supply device which concerns on Embodiment 1 of this invention. It is a front view which shows the output terminal of the insulation type switching power supply device concerning Embodiment 2 of this invention. It is a side view which shows the output terminal of the insulation type switching power supply device which concerns on Embodiment 2 of this invention. It is a perspective view which shows the output terminal of the insulation type switching power supply device which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
Below, the output terminal of the electric equipment which concerns on Embodiment 1 of this invention is demonstrated based on drawing. The electric device provided with the output terminal according to the first embodiment is an in-vehicle insulated switching power supply device, for example, an insulated DC / DC converter device. 1 to 3 show an output terminal according to the first embodiment. FIG. 1 is an exploded perspective view, FIG. 2 is a front view, and FIG. 3 is a side view (shown in partial cross section). In the drawing, the same and corresponding parts are denoted by the same reference numerals.

  The output terminal 1 according to the first embodiment is attached to the casing 6 of the insulated switching power supply device, and a harness 8 is used for connection with an external device (for example, an auxiliary electric system component of an automobile). The output terminal 1 is formed by integrally molding a bolt 2 as a conductive member into an insulating resin component 3. As shown in FIG. 1, the bolt 2 has an output-side screw portion 21 at one end and an input-side screw portion 22 at the other end, and the resin component 3 is disposed at the center thereof.

  The output side screw portion 21 is disposed outside the housing 6 and is connected to an external device via the harness 8. For example, a male screw is cut in the output side screw portion 21, and the output side screw portion 21 is connected to the harness 8 by tightening with a nut 9 with a female screw cut across the connection terminal portion of the harness 8. The input side screw portion 22 is connected to an internal component (not shown) inside the housing 6 through a through hole 62 provided in the housing 6. The input-side screw portion 22 is provided with a second bolt hole 23 to which the second bolt 7 for connecting to the internal component is fastened.

  As shown in FIGS. 2 and 3, the resin component 3 includes an annular portion 31 into which the bolt 2 is inserted, and a fixing portion 32 in which a part of the outer peripheral surface 31 a of the annular portion 31 is expanded outward. Yes. The fixing portion 32 penetrates the flat plate portion 33 parallel to the housing outer surface 61 that is the mounting surface of the output terminal 1 and the flat plate portion 33 in a direction parallel to the axial direction of the bolt 2 (arrow A in FIG. 1). The first fixing screw hole 34 is provided.

  When the first fixing screw hole 34 is centered on the axis of the bolt 2 on a plane parallel to the flat plate portion 33, the first fixing screw hole 34 is disposed on the same side as the side where the second bolt 7 is fastened. Is done. That is, in the example shown in FIG. 1, the second bolt 7 is fastened with respect to the center point from the upper side (arrow B in FIG. 1), and the first fixing screw hole 34 is disposed on the upper side with respect to the center point. ing. With such a structure, it is possible to easily attach to the housing 6 with one fixing screw 5 and to reduce the stress load applied to the output terminal 1 when the second bolt 7 is fastened.

  Further, inside the first fixing screw hole 34, a collar 10 with a female screw cut is mounted, and this collar 10 is longer than the thickness dimension of the flat plate portion 33. Therefore, the end portion of the collar 10 protrudes from the surface of the flat plate portion 33 that faces the housing outer surface 61 as shown in FIG. By fitting the protruding portion of the collar 10 into the second fixing screw hole 63 of the housing 6, positioning when fastening the fixing screw 5 is facilitated.

  Furthermore, as shown in FIG. 3, the annular portion 31 of the resin component 3 has a hook-shaped guide 35 in which a part of the end portion of the outer peripheral surface 31 b protrudes toward the output-side screw portion 21. In the first embodiment, the guide 35 is provided at one location close to the first fixing screw hole 34. Contact between the harness 8 and the fixing screw 5 can be prevented by the guide 35 made of the insulating resin. Further, the annular portion 31 includes an O-ring 4 that seals the through hole 62 on the input-side screw portion 22 side. Thereby, the inside of the housing | casing 6 can be sealed and it becomes the specification which can endure a high-humidity environment.

  When attaching the output terminal 1 according to the first embodiment to the housing 6, first, the collar 10 protruding from the flat plate portion 33 of the resin component 3 is provided with the second fixing screw hole provided in the housing 6. 63, and the output terminal 1 is positioned on the housing 6. At the same time, the input side screw portion 22 is arranged inside the housing 6 through a through hole 62 provided in the housing 6. Subsequently, the fixing screw 5 is fastened to the second fixing screw hole 63 via the first fixing screw hole 34. Through these operations, the output terminal 1 is fixed to the housing 6, and the through-hole 62 of the housing 6 is sealed by the O-ring 4 provided in the annular portion 31 of the resin component 3.

  As described above, according to the output terminal 1 of the in-vehicle insulated switching power supply device according to the first embodiment, the harness 8 and the fixing screw 5 are prevented from coming into contact with the output side screw portion 21 side of the resin component 3. By providing the hook-shaped guide 35 for the necessary part only, contact between the harness 8 and the fixing screw 5 can be prevented, and the degree of freedom in handling the harness 8 is ensured. For this reason, it is possible to deal with the attachment of the harness 8 from various directions and angles, and as a result, the types of output terminals can be reduced, and the number of man-hours related to evaluation after assembly can be reduced. is there.

  Further, when the first fixing screw hole 34 is centered on the axis of the bolt 2 on a plane parallel to the flat plate portion 33, the same side as the side on which the second bolt 7 is fastened to the center point. Therefore, it is possible to easily attach the housing 6 to the housing 6 with one fixing screw 5 and to reduce the stress load applied to the output terminal 1 when the second bolt 7 is fastened.

Embodiment 2. FIG.
4 and 5 show an output terminal of the in-vehicle insulated switching power supply device according to Embodiment 2 of the present invention. FIG. 4 is a front view seen from the input side screw portion side, and FIG. 5 is a side view. (Shown in partial cross section). In the drawing, the same and corresponding parts are denoted by the same reference numerals.

  The resin component 3 </ b> A of the output terminal according to the second embodiment has a boss 36 that is a positioning projection on a surface facing the outer surface 61 of the housing. The boss 36 is fitted or pressed into a recess 64 provided on the outer surface 61 of the casing facing the resin component 3 </ b> A, and positions the output terminal on the casing 6. As for the position of the boss 36, when the axis of the bolt 2 is the center point, it is desirable that the boss 36 be disposed on the opposite side of the center point from the first fixing screw hole 34. Since other configurations are the same as those in the first embodiment, description thereof is omitted.

  When attaching the output terminal according to the second embodiment to the housing 6, first, the boss 36 protruding from the surface facing the housing outer surface 61 of the resin component 3 </ b> A is provided in the recess 64 provided in the housing outer surface 61. The output terminal 1 is positioned on the housing 6 by fitting or press-fitting into the housing 6. At the same time, the input side screw portion 22 is arranged inside the housing 6 through a through hole 62 provided in the housing 6. Subsequently, the fixing screw 5 is fastened to the second fixing screw hole 63 via the first fixing screw hole 34. Through these operations, the output terminal 1 is fixed to the housing 6, and the through-hole 62 of the housing 6 is sealed by the O-ring 4 provided in the annular portion 31 of the resin component 3 </ b> A.

  In the second embodiment, since the positioning when the fixing screw 5 is fastened is performed by the boss 36 and the concave portion 64, the collar 10 fixed in the first fixing screw hole 34 has the above-described configuration. It is not necessary to be longer than the thickness dimension of the flat plate portion 33 as in the first embodiment, and may be the same as the thickness dimension of the flat plate portion 33. However, a long collar 10 may be used as in the first embodiment, and in that case, stable and reliable positioning can be performed at two positions across the center point.

  According to the second embodiment, the boss 36 is provided on the surface of the resin component 3 </ b> A facing the housing outer surface 61, and the recess 64 for fitting or press-fitting the boss 36 is provided on the housing outer surface 61. Positioning work when fastening 5 is easy, and the same effect as in the first embodiment can be obtained.

Embodiment 3 FIG.
FIG. 6 is a perspective view showing an output terminal of the in-vehicle insulated switching power supply device according to Embodiment 3 of the present invention. In FIG. 6, the same reference numerals are assigned to the same and corresponding parts as in FIG. In the resin component 3B of the output terminal according to the third embodiment, a flange-shaped guide 35A and positioning guides 35B and 35C protruding to the output-side screw portion 21 side are arbitrarily provided at the outer peripheral surface end portion of the annular portion. It is provided with a gap. Since other configurations are the same as those in the first embodiment, description thereof is omitted.

In the third embodiment, the guide 35 </ b> A prevents the harness 8 and the fixing screw 5 from coming into contact as in the first and second embodiments. Further, by arranging the harness 8 in the gap between the guide 35A and the positioning guides 35B and 35C, positioning when the harness 8 is connected to the output side screw portion 21 is facilitated. Note that the output terminal according to the third embodiment, guide 35A and the positioning guide 35B, while 35C was provided total of three, the number of guides is not limited to this, two or four It may be.

  According to the third embodiment, in addition to the same effects as those of the first embodiment, the harness 8 is arranged in the gap between the plurality of guides 35A, 35B, and 35C, so that the harness 8 is routed in the left-right and right-down directions. Therefore, positioning when connecting the harness 8 is facilitated, and the number of man-hours and the work time during assembly are reduced. It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  INDUSTRIAL APPLICABILITY The present invention can be used as an output terminal of an electric device, particularly an in-vehicle insulated switching power supply device.

1 Output terminal, 2 bolts, 3, 3A, 3B resin parts, 4 O-ring,
5 fixing screw, 6 housing, 7 second bolt, 8 harness, 9 nut, 10 collar, 21 output side screw portion, 22 input side screw portion, 23 second bolt hole, 31 annular portion, 31a, 31b outer peripheral surface , 32 fixing portion, 33 flat plate portion, 34 first fixing screw hole, 35, 35A, 35B, 35C guide, 36 boss,
61 Housing outer surface (terminal mounting surface), 62 through hole, 63 second fixing screw hole, 64 recess.

Claims (9)

Resin component having a bolt having an output side screw portion at one end and an input side screw portion at the other end, an annular portion into which the bolt is inserted, and a fixing portion in which a part of the outer peripheral surface of the annular portion is expanded outward with the door, the input-side threaded portion is connected to the internal components inside the housing through a through hole provided in the housing of the electrical device, the output-side screw portion is disposed outside of the housing An output terminal of an electric device connected to an external device via a harness,
The fixing part of the resin part includes a flat plate part parallel to the outer surface of the housing , and a first fixing screw hole penetrating the flat plate part in a direction parallel to the axial direction of the bolt. is secured to the outer surface of the casing by through one of the fixing screw holes for fastening the fixing screws into the second fixing screw holes provided in the housing,
The annular part of the resin part has a part in the vicinity of the first fixing screw hole at the end of the outer peripheral surface thereof protruding toward the output side screw part to prevent contact between the harness and the fixing screw. An output terminal of an electrical device, characterized by having a guide in the shape of a coil. In the end portion of the outer peripheral surface of the front Symbol annulus positioning guide is provided at a said guide and any gap, said harness by placing the harness gap between the guide and the positioning guide claim 1 Symbol placement of electrical equipment of the output terminal, wherein the positioning. The input-side screw portion has a second bolt hole to which a second bolt is fastened when connected to the internal component, and the first fixing screw hole is on a plane parallel to the flat plate portion. 3. The electricity according to claim 1, wherein when the axis of the bolt is a center point, the second bolt is disposed on the same side as the side to which the second bolt is fastened. The output terminal of the device. The output of the electric device according to claim 3, wherein the second bolt is fastened to the center point from above, and the first fixing screw hole is disposed above the center point. Terminal. A collar that is longer than the thickness of the flat plate portion is mounted inside the first fixing screw hole, and the end of the collar that protrudes from the surface of the flat plate portion that faces the housing. The portion is fitted into the second fixing screw hole of the housing, and the output terminal of the electric device according to any one of claims 1 to 4 . The resin component includes a positioning projection on the outer surface opposite to the surface of the housing, the positioning projection is fitted in a recess provided in the exterior surface of the housing opposite to the resin component or The output terminal of the electric device according to any one of claims 1 to 5 , wherein the output terminal is press-fitted. The electric device according to claim 6 , wherein the positioning protrusion is disposed on a side opposite to the first fixing screw hole with respect to the center point when the axis of the bolt is a center point. Output terminal. Said annular portion of said resin component comprises an O-ring on the input side screw portion side, according to any one of claims 1 to 7, characterized in that sealing the through hole of the housing Output terminal of electrical equipment. The output terminal of an electric device according to any one of claims 1 to 8 , wherein the electric device is an in-vehicle insulated switching power supply device.