Shield structure

Abstract

To provide a shield structure which allows easy processing of a shield shell so that the cost may be reduced.SOLUTION: A shield structure has: a cylindrical shield shell 10 inside of which a wire is housed; and a cylindrical holder having its one end 21a housed inside the shield shell. On the one end side of the holder, the shield structure has an annular rib 22 provided to protrude in a direction intersecting the axial direction. One end 11a on the holder side of the shield shell is provided with a recess 14 on its outer periphery. A coil spring 30 for shield connection is held in a space S defined by the rib 22 and the recess 14.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a shielding structure.

Background Art

[0002] Connectors mounted on electric vehicles such as electric cars and hybrid cars are required to have a shielding function and a function of connecting to units such as battery packs and power control units. The shielding component of the connector has a cylindrical shape and is made of a conductive metal material such as copper or aluminum, and houses an electric wire inside the cylindrical shape. A concave shape, that is, a groove, is formed over the entire circumference on the outside of the cylindrical shape. A ring-shaped coil spring is installed in this groove to connect to the units and is held so as not to fall off. As a technology of this kind, for example, Patent Document 1 discloses a connection device for transmitting a high-voltage current. Also in this connection device, a shielding spring element is connected to and fixed to a shielding sleeve.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in order to form a groove for installing the ring-shaped coil spring in the shielding component, high precision is required, so cutting is performed. For this reason, the processing cost becomes high.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a shielding structure that facilitates processing of a shielding shell and enables cost reduction.

Means for Solving the Problems

[0006] To achieve the above object, the shield structure according to the present invention is characterized as follows. A cylindrical shield shell for accommodating an electric wire therein, and a cylindrical holder having one end portion accommodated inside the shield shell. An annular rib is provided on the one end portion side of the holder so as to protrude in a direction intersecting the axial direction. A recess is provided on the outer periphery at one end portion of the shield shell on the holder side. A shield structure in which a coil spring for shield connection is held in a space formed by the rib and the recess.

Advantages of the Invention

[0007] According to the shield structure of the present invention, the processing of the shield shell is facilitated and cost reduction is possible.

[0008] The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through the embodiments for carrying out the invention described below (hereinafter referred to as "embodiments") with reference to the accompanying drawings.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0010] Specific embodiments of the present invention will be described below with reference to the respective figures.

[0011] FIG. 1 is a front view showing a shield structure 1 according to an embodiment. FIG. 2 is a cross-sectional view taken along line A-A of the shield structure 1 shown in FIG. 1. FIG. 3 is an enlarged view of a portion B in FIG. 2. FIG. 4 is a perspective view of a connector 40 to which the shield structure 1 shown in FIG. 1 is applied.

[0012] As shown in FIGS. 1 and 2, the shield structure 1 includes a shield shell 10 and a front holder 20.

[0013] The shield shell 10 has a cylindrical portion 11 for accommodating an electric wire and an annular rib 12 provided over the entire circumference on the outer periphery of the cylindrical portion 11. The shield shell 10 is made of a metallic material having conductivity such as copper or aluminum and has an electromagnetic wave shielding function. The cylindrical portion 11 has a cylindrical shape, one end portion 11a is open, and the other end portion 11b has a bottom portion 13. The bottom portion 13 has an opening 111. An electric wire connected to a terminal held by the front holder 20 is drawn out from the opening 111.

[0014] One end portion 11a side of the shield shell 10 is fitted to the front holder 20. On the one end portion 11a side of the shield shell 10, a recess 14 (see FIG. 3) is provided on the outer periphery. The recess 14 is formed, for example, by drawing the one end portion 11a and is made thinner than the thickness of the cylindrical portion 11 over the entire circumference of the one end portion 11a. That is, the one end portion 11a of the shield shell 10 has an L-shaped cross-sectional shape shown in FIG. 3.

[0015] The front holder 20 has a cylindrical portion 21 and an annular rib 22 provided on the outer periphery of the cylindrical portion 21, and holds the terminals. The front holder 20 is made of an insulating resin. The cylindrical portion 21 has a cylindrical shape, one end portion 21a is open, and the other end portion 21b has a bottom portion 23. The bottom portion 23 has an opening 211. One end portion 21a of the front holder 20 is accommodated inside the shield shell 10. The rib 22 is provided so as to protrude from the outer periphery of the cylindrical portion 21 in a direction intersecting the axial direction (the vertical direction in FIG. 1).

[0016] In a state where one end portion 21a of the front holder 20 is accommodated in one end portion 11a of the shield shell 10, as shown in FIG. 3, a space S is formed by the rib 22 and the recess 14. The space S is formed over the entire circumferential direction at the connection portion between the shield shell 10 and the front holder 20. A coil spring 30 for shield connection is disposed in the space S.

[0017] The coil spring 30 abuts on the shield shell 10 and the front holder 20 at three locations in the space S. These three locations are the bottom surface 11A and the side surface 11B in the recess 14 of the shield shell 10, and the side surface 22A of the rib 22 of the front holder 20. The bottom surface 11A is the outer peripheral surface of the thin one end portion 11a. The side surface 11B is a surface that connects the outer peripheral surface 16 of the portion where the recess 14 is not formed and adjacent to the recess 14 at the one end portion 11a and the bottom surface 11A. The side surface 22A is a surface of the rib 22 of the front holder 20 that faces the one end portion 11a of the shield shell 10. The coil spring 30 is sandwiched and held between the shield shell 10 and the front holder 20 at the bottom surface 11A, the side surface 11B, and the side surface 22A.

[0018] A locking mechanism 25 is provided between the shield shell 10 and the front holder 20. The locking mechanism 25 has a convex portion on one end portion 21a of the front holder 20, where the outer peripheral surface 24 bulges toward one end portion 11a of the shield shell 10. The locking mechanism 25 may have the convex portion provided in an annular shape over the entire circumference of the one end portion 21a, or one or more concave portions provided in a part of the one end portion may be provided. By providing the locking mechanism 25 between the shield shell 10 and the front holder 20, when a pressing force against the front holder 20 is applied to the side of the one end portion 11a of the shield shell 10, locking is engaged by the repulsive force of the locking mechanism 25. With this structure, it is possible to prevent the shield shell 10 and the front holder 20 from coming off.

[0019] As shown in FIG. 3, a part of the coil spring 30 protrudes from the outer peripheral surface 16 on the side of the one end portion 11a of the shield shell 10 and the outer peripheral surface 22a of the rib 22 in the front holder 20. At this protruding portion, the coil spring 30 can be electrically connected to a metal case or the like of an in-vehicle unit such as a battery pack or a power control unit (PCU).

[0020] The connector 40 shown in FIG. 4 includes a shield structure 1 and a housing 41. When a mating connector is fitted to this connector 40, it is electrically connected to in-vehicle units.

[0021] Here, with reference to FIGS. 5 and 6, the shield structure 101 of the reference example will be described. The shield structure 101 of the reference example mainly differs from the shield structure 1 shown in FIGS. 1 to 3 in that it does not have the concave portion 14 and has a concave groove 115 for holding the coil spring 30 over the entire circumference of the one end portion 111a of the shield shell 110. In the shield structure 101 of the reference example, in order to form the concave groove 115 in the shield shell 110, high-precision cutting is required, so the processing cost is high.

[0022] On the one hand, according to the shielding structure 1 of the present embodiment, the coil spring 30 can be held between the recess 14 formed by drawing or the like and the rib 22 of the front holder 20 without forming the concave groove 115 on the one end portion 11a side of the shield shell 10. Therefore, the processing of the shield shell 10 becomes easy, and the processing cost can be reduced.

[0023] Note that the present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, etc. In addition, the material, shape, dimensions, numerical values, form, number, arrangement position, etc. of each component in the above-described embodiment are arbitrary as long as the present invention can be achieved, and are not limited.

[0024] Here, the features of the shielding structure according to the embodiment of the present invention described above are briefly summarized and listed in [1] to [3] below.

[0025] [1] A cylindrical shield shell (10) that houses an electric wire inside, A cylindrical holder (front holder 20) whose one end portion (21a) is housed inside the shield shell, and An annular rib (22) is provided on the one end portion side of the holder so as to protrude in a direction intersecting the axial direction, A recess (14) is provided on the outer periphery of the one end portion (11a) of the shield shell on the holder side, A shielding structure (1) in which a coil spring (30) for shield connection is held in a space (S) formed by the rib (22) and the recess (14).

[0026] According to the shielding structure having the configuration of [1] above, the coil spring can be held in the space formed by the recess formed at one end of the shield shell and the rib of the holder. For this reason, usually, it is necessary to form a concave groove for holding the coil spring on the one end portion side of the shield shell, but in the shielding structure having the above configuration, it is not necessary to form a concave groove. Therefore, according to the shielding structure having the above configuration, the processing of the shield shell becomes easy, and the processing cost can be reduced.

[0027] [2] A locking mechanism (25) is provided at a location (outer peripheral surface 24) where the shield shell and the holder are adjacent to each other. The shield structure according to the above (1).

[0028] According to the shield structure having the configuration of the above [2], the locking mechanism makes the shield shell and the holder unable to come off.

[0029] [3] A part of the coil spring protrudes from the outer peripheral surface (16) on the one end side of the shield shell and the outer peripheral surface (22a) of the rib (22) of the holder. The shield structure according to the above [1] or [2].

[0030] According to the shield structure having the configuration of the above [3], when units of a mating partner come into contact with the outer peripheral surfaces of the holder and the shield shell, they come into contact with a part of the coil spring and can be electrically connected.

Explanation of Reference Numerals

[0031] 1 Shield structure 10 Shield shell 11 Cylindrical part 11a One end part 11A Bottom surface 11b The other end part 11B Side surface 12 Rib 14 Recess 16 Outer peripheral surface 20 Front holder 21 Cylindrical part 21a One end part 21b The other end part 22 Rib 22a Outer peripheral surface 22A Side surface 24 Outer peripheral surface 25 Locking mechanism

Claims

1. A cylindrical shield shell that houses an electric wire inside, and a cylindrical holder with one end housed inside the shield shell, wherein an annular rib is provided on the one end side of the holder so as to protrude in a direction intersecting the axial direction, a recess is provided on the outer periphery at one end of the shield shell on the holder side, A shield structure in which a coil spring for shield connection is held in a space formed by the rib and the recess.

2. A locking mechanism is provided at a location where the shield shell and the holder are adjacent, The shield structure according to claim 1.

3. A part of the coil spring protrudes from the outer peripheral surface on the one end side of the shield shell and the outer peripheral surface of the rib of the holder, The shield structure according to claim 1 or 2.

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