Shield structure

Abstract

To provide a shield structure which can be manufactured at reduced cost.SOLUTION: A shield structure is fixed to an attachment target on a vehicle body and is supported at a predetermined position of an electric wire 10, and includes a shield shell 2 having a cylindrical shell body 21 having at least one wall portion 21B that defines a shielded space 20, and a reinforcing structure 5 that reinforces the shell body, a housing 3 that holds an electric wire and is inserted into the shielded space 20, and a locking structure 4 for maintaining the housing 3 accommodated in the shielded space 20, the locking structure 4 includes a locking arm 314 provided on the housing 3 and a locked portion 5A provided on the shield shell and locked by the locking arm 314, the reinforcing structure 5 is configured to bulge out toward the inside of the shielded space, including a cut edge formed by cutting out a wall portion, and the locked portion is provided on the cut edge.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a shield structure. [Background technology]

[0002] A wide variety of electronic devices are mounted in automobiles, and wire harnesses are arranged to transmit power, control signals, etc. to the electronic devices. The wire harness includes a plurality of electric wires and connectors, and is connected to the electronic devices and other wire harnesses by fitting the connectors to the connectors of the electronic devices or the connectors of other wire harnesses.

[0003] In such wire harnesses, a shield structure is known that is attached to two shielded cables that handle high voltages in electric vehicles (EVs), hybrid electric vehicles (HEVs), etc. (For example, see Patent Document 1.) One example of the shield structure includes a metal shield shell having a shield space that houses electric wires, and a housing that is inserted into the shield space while supporting the electric wires.

[0004] The shield shell has a cylindrical shell body that defines a shielded space, a plate-shaped vehicle body fixing part that is provided continuous with the shell body and overlaps and is fixed to the vehicle body, a reinforcing part for ensuring the strength of the vehicle body fixing part, and a locking receiving part that is locked to the housing. The reinforcing part is provided at the boundary between the shell body and the vehicle body fixing part, and the locking receiving part is provided on the shell body.

[0005] When assembling such a shielding structure, the housing with the electric wires supported therein is inserted into the shielding space of the shielding shell. As the insertion progresses, the housing is locked into the locking receiving portion of the shielding shell. In this manner, the shielding structure is assembled. Thereafter, the vehicle body fixing portion of the shielding structure is overlapped with the vehicle body and fixed to the vehicle body by bolting. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2023-57199 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the conventional shield structure, the reinforcing portion and the locking receiving portion are each formed by processing separately when manufacturing the shield shell, and therefore the manufacturing cost is high.

[0008] An object of the present invention is to provide a shield structure which reduces manufacturing costs. [Means for solving the problem]

[0009] In order to solve the above problems and achieve the above objects, the invention described in claim 1 is a shielding structure that is fixed to an attachment target on a vehicle body and is supported at a predetermined position on an electric wire, the shielding structure comprising: a shielding shell having a cylindrical shell main body having at least one wall portion and forming a shielded space, and a reinforcing structure that reinforces the shell main body; a housing that holds the electric wire and is inserted into the shielded space, and a locking structure for maintaining the housing accommodated in the shielded space, the locking structure having a locking arm provided on the housing and a locked portion provided on the shielding shell and locked to the locking arm, the reinforcing structure including a cut edge formed by cutting out the wall portion and configured to bulge out toward the inside of the shielded space, and the locked portion being provided on the cut edge. Effect of the Invention

[0010] According to the present invention, the manufacturing cost can be reduced. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a shield structure according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view showing a shield shell that constitutes the shield structure. [Diagram 3] FIG. 2 is a vertical sectional view of the shield shell. [Figure 4] 4 is a perspective view showing a state in which a housing constituting the shield structure holds electric wires. FIG. [Diagram 5] FIG. 2 is a vertical cross-sectional view of the housing. [Figure 6] 5 is a cross-sectional view illustrating a state in which the shield shell is inserted into a shielded space. FIG. [Figure 7] 7 is a diagram showing a step subsequent to that shown in FIG. 6, and is a vertical cross-sectional view showing a state in which the locking arms of the housing have locked the locked portions of the shield shell. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing a shield structure 1 according to an embodiment of the present invention. Fig. 2 is a perspective view showing a shield shell 2 constituting the shield structure 1. Fig. 3 is a vertical cross-sectional view of the shield shell. The shield structure 1 constitutes a wire harness arranged in an automobile or the like, and constitutes a shield circuit that shields electrical noise leaking to the outside from an electric wire 10 that transmits a control signal or the like, or electrical noise flowing in from the outside.

[0013] 1 and 6, the shielding structure 1 of this embodiment is supported at a predetermined position for a pair of electric wires 10 (electric wires, shown in FIG. 1) and fixed to a metallic mounting target in a vehicle body to form a shielding circuit, and includes a cylindrical shielding shell 2 having a shielded space 20 (shown in FIG. 6), a housing 3 (shown in FIG. 1) that holds the pair of electric wires 10, 10 and is inserted into the shielded space 20, and a locking structure 4 (shown in FIG. 6) for maintaining the housing 3 housed in the shielded space 20. A terminal connector (not shown) is connected to each of the pair of electric wires 10, 10 at its end (rear end, the end on the near side in FIG. 1).

[0014] In the following, the axial direction of each of the pair of electric wires 10, 10 may be referred to as the "front-rear direction" and indicated by the "arrow Y", the direction in which the pair of electric wires 10, 10, 2 are arranged may be referred to as the "left-right direction" and indicated by the "arrow X", and the direction perpendicular to the arrows X and Y and in which the pair of divided bodies 31A, 31B sandwich the electric wire 10 may be referred to as the "height direction" and indicated by the "arrow Z". In addition, in the arrow Y, one end side of the electric wire 10 (the back front side in FIG. 1) may be referred to as the "front Y1", and the opposite front side may be referred to as the "rear Y2". In addition, in the arrow Z, one side may be referred to as the "upper Z1" and the other side may be referred to as the "lower Z2".

[0015] The shielded shell 2 is formed by pressing and bending a conductive metal plate. As shown in Fig. 2, the shielded shell 2 includes a shell body 21 forming a shielded space 20, a cylindrical portion 22 continuing to the front Y1 of the shell body 21, a plate-shaped vehicle body fastening portion 23 (extension plate) provided continuing to the rear Y2 of the shell body 21 and fastened to an attachment target (not shown) with a bolt, and a reinforcing structure 5 including an engaged portion 5A (with the same reference numeral as a cut edge 5A described later) engaged with an engaging arm 314 provided on the housing 3 described later.

[0016] As shown in FIG. 2, the shell body 21 has an upper wall 21A, a bottom wall 21B (wall portion), and a pair of side walls 21C, 21D, and is equipped with a storage portion body 210 formed in a rectangular cylindrical shape with the axis in the front-to-rear direction Y to define the shielded space 20, and a blocking wall 211 located at the rear end of the storage portion body 210 and filling the gap with the tubular portion 22.

[0017] 2, the vehicle body fastening portion 23 is configured in a plate shape extending in the front-rear direction Y and the left-right direction X, and is provided continuous with the bottom wall 21B of the shell main body 21. The vehicle body fastening portion 23 is provided with a bolt insertion hole 230 through which a bolt (not shown) is inserted.

[0018] As shown in FIG. 2, the reinforcing structures 5 are provided on the bottom wall 21B of the shell body 21, and are provided in pairs at an interval in the left-right direction X.

[0019] 2 and 3, each reinforcing structure 5 includes a cut edge 5A formed by cutting out the bottom wall 21B, and is configured to bulge toward the inside of the shielded space 20. Each reinforcing structure 5 is configured by performing bead processing in a pressing process. Each reinforcing structure 5 includes a reinforcing part main body 50 including the cut edge 5A, and a hole part 51 with the cut edge 5A as a rear edge.

[0020] The cut edge 5A is formed by cutting the bottom wall 21B linearly in the left-right direction X, and is configured to bulge upward Z1 so as to be in an arc shape when viewed from the front Y1, and is configured to be locked by a locking arm 314 (described later) provided on the housing 3. That is, the locked portion 5A is provided on the cut edge 5A.

[0021] The reinforcement body 50 is provided continuously in the front-rear direction Y such that the rear end 5B is located at the vehicle body fastening portion 23 and the front end 5A (given the same reference number as the cut edge 5A) is located at the bottom wall 21B. The reinforcement body 50 is also configured to have an inclined surface 50a that protrudes upward Z1 as it proceeds forward Y1. The inclined surface 50a is provided continuously from the front end 5A to the rear end 5B of the reinforcement body 50. This inclined surface 50a is configured to slide over a locking protrusion 317 of a locking arm 314 (described later) provided on the housing 3.

[0022] As shown in FIGS. 3 and 4 , the housing 3 has a pair of electric wire insertion portions 30, 30 through which the pair of electric wires 10, 10 are respectively inserted, and includes an upper division body 31A and a lower division body 31B that sandwich and hold the pair of electric wires 10, 10, a locking mechanism (not shown) provided on one side surface of the upper division body 31A and the lower division body 31B in the left-right direction X, and a hinge 32 (shown in FIG. 4 ) provided on the other side surface of the pair of division bodies 31A, 31B in the left-right direction X to connect the pair of division bodies 31A, 31B to each other.

[0023] The upper divisional body 31A and the lower divisional body 31B are each configured in a block shape. The upper divisional body 31A and the lower divisional body 31B have divisional faces 310a, 310b extending in directions perpendicular to the top and bottom (XY directions), respectively, and are configured so that the electric wire 10 inserted into the electric wire insertion portion 30 described below is held in a state in which the divisional faces 310a, 310b are in contact with each other.

[0024] As shown in Fig. 3, each wire insertion portion 30 has a pair of grooves 30A, 30B formed by cutting out the dividing surfaces 310a, 310b of the pair of divisional bodies 31A, 31B, respectively, into groove shapes extending in the front-rear direction Y. Hereinafter, one of the pair of grooves 30A, 30B may be referred to as the "upper groove 30A," and the other of the pair of grooves 30A, 30B may be referred to as the "lower groove 30B." The upper groove 30A is provided in the upper divisional body 31A, and the lower groove 30B is provided in the lower divisional body 31B.

[0025] As shown in FIG. 4, the upper split body 31A comprises an upper split body main body 310A having an upper groove portion 30A formed in the upper split surface 310a, a pair of upper electric wire support portions 311A, 311A ​​that are continuous with the upper groove portion 30A of the upper split body main body 310A and extend forward Y1 to support a pair of electric wires 10, 10, respectively, and an upper connecting portion 312A that connects the pair of upper electric wire support portions 311A, 311A.

[0026] As shown in Figures 4 and 5, the lower split body 31B includes a lower split body main body 310B having a lower groove portion 30B formed in a lower split surface 310b, a lower wire support portion 311B that is continuous with the lower groove portion 30B of the lower split body main body 310B and is assembled to the upper wire support portion 311A ​​to support each of a pair of electric wires 10, 10, a one-side support portion 313B that is continuous with the lower groove portion 30B of the lower split body main body 310B and extends rearward Y2 to support one of the electric wires 10, and a locking arm 314 (shown in Figure 5) that locks the locked portion 5A of the shield shell 2.

[0027] 4 and 5, the lower division body main body 310B is provided with an insertion portion 315 through which the locked portion 5A provided on the shell body 21 is inserted. As shown in Fig. 5, the insertion portion 315 is located below Z2 of the lower groove portion 30B, and is formed in the shape of a groove extending in the front-rear direction Y by cutting out the lower surface of the lower division body main body 310B (the surface that can come into contact with the bottom wall 21B of the shell body 21).

[0028] As shown in Figs. 5 and 6, the locking arm 314 is formed by cutting out the wall 300 located between the lower groove 30B and the insertion portion 315, and is formed to extend forward Y1, and is configured to include a locking protrusion 317 provided at the free end of the arm body 316 to lock the locked portion 5A. The locking protrusion 317 has an orthogonal surface 317A that faces and contacts the cut edge 5A of the reinforcement structure 5, and a sliding portion 317B that is provided at the lower end of the orthogonal surface 317A and continues to the forward Y1 and slides on the inclined surface 50a of the reinforcement structure 5. The orthogonal surface 317A is configured as a plane extending in the up-down direction Z and the left-right direction X. The locking arm 314 constitutes the locking structure 4 together with the locked portion 5A provided on the shield shell 2.

[0029] Next, a procedure for assembling the shield structure 1 having the above-mentioned configuration will be described with reference to Figures 4, 6, and 7. In Figure 7, hatching showing the cross section of the electric wire 10 is omitted.

[0030] First, the pair of electric wires 10, 10 are inserted into the shield shell 2 with the vehicle body fastening portion 23 facing rearward Y2. Then, the housing 3 is positioned rearward Y2 of the shield shell 2, and predetermined positions of the electric wires 10 are placed in the upper groove portion 30A (or the lower groove portion 30B) of the upper division body 31A (or the lower division body 31B) of the housing 3, and each electric wire 10 is fixed to the upper division body 31A (or the lower division body 31B) using tape or a cable tie.

[0031] Then, the upper divisional body 31A is displaced (moved) so as to approach the lower divisional body 31B. As the displacement of the upper divisional body 31A progresses, the divisional surfaces 310a, 310b of the upper divisional body 31A and the lower divisional body 31B come into contact with each other, the electric wires 10 are inserted into the electric wire insertion portions 30, and the housing 3 is brought into an engaged state by the locking mechanism. In this engaged state, the pair of divisional bodies 31A, 31B maintains a state in which the electric wire 10 is sandwiched and held therebetween, as shown in FIG.

[0032] After that, the housing 3 is moved forward Y1 with respect to the shield shell 2. As shown in FIG. 6, the movement progresses and the sliding portion 317B of the locking projection 317 of the locking arm 314 comes into contact with the rear end 5B of the inclined surface 50a of the reinforcement structure 5. As the movement progresses further, the arm body 316 is bent and the sliding portion 317B of the locking projection 317 slides on the inclined surface 50a of the reinforcement structure 5 while the locking projection 317 rides up the inclined surface 50a of the reinforcement structure 5. As the movement progresses further, the locking projection 317 passes the front end 5A of the inclined surface 50a of the reinforcement structure 5, the arm body 316 returns to its natural state, and the orthogonal surface 317A of the locking projection 317 comes into contact opposite the cut edge 5A. In this way, the locking arm 314 of the housing 3 locks the locked portion 5A of the shield shell 2. As a result, the housing 3 is prevented from coming off the shield shell 2. In this manner, the assembly of the shield shell 2 is completed.

[0033] Thereafter, the shield structure 1 is bolted to the vehicle body fastening portion 23. In this manner, a shield circuit is formed that blocks electrical noise leaking to the outside from the electric wire 10 that transmits a control signal or the like, or electrical noise flowing in from the outside.

[0034] According to the above-mentioned embodiment, the shielded shell 2 includes a cylindrical shell body 21 that constitutes the shielded space 20 and a reinforcing structure 5 that reinforces the shell body 21, a housing 3 that holds the electric wire 10 and is inserted into the shielded space 20, and a locking structure 4 that maintains the housing 3 in a state of being accommodated in the shielded space 20. The locking structure 4 includes a locking arm 314 provided on the housing 3 and a locked portion 5A that is provided on the shielded shell 2 and is locked by the locking arm 314. The reinforcing structure 5 includes a cut edge 5A formed by cutting out the bottom wall 21B (wall portion) and is configured to bulge toward the inside of the shielded space 20, and the locked portion 5A is provided on the cut edge 5A. The reinforcing structure 5 having such a locked portion 5A is formed by performing bead processing in a press process. This simplifies the press process and reduces the cost of manufacturing the mold, compared to the conventional technology in which the reinforcing portion and the locking receiving portion are formed by processing them separately. This makes it possible to reduce manufacturing costs.

[0035] Furthermore, the cut edge 5A is configured to bulge toward the inside of the shielded space 20, thereby increasing the shear cross-sectional area, thereby making it possible to secure the locking with the locking arm 314.

[0036] The shield shell 2 also has a vehicle body fastening portion 23 (extension plate) that is continuous with the bottom wall 21B (wall portion) and extends in a direction away from the shell main body 21, and the reinforcing structure 5 is provided continuously from the vehicle body fastening portion 23 to the bottom wall 21B in the insertion direction (front-rear direction Y) in which the housing 3 is inserted into the shielded space 20. This allows the reinforcing structure 5 to reinforce the strength from the vehicle body fastening portion 23 to the bottom wall 21B. As a result, when the shielding structure 1 is fixed to an attachment target on the vehicle body, even if a vibration load is generated in the shielding structure 1, deformation of the portion from the vehicle body fastening portion 23 to the bottom wall 21B can be suppressed.

[0037] Further, the reinforcement structure 5 has an inclined surface 50a that is inclined so as to protrude toward the inside (upward Z1) of the shielded space 20 as the housing 3 advances in the insertion direction (forward Y1) in which the housing 3 is inserted into the shielded space 20, and the inclined surface 50a is provided continuously from one end 5B to the other end 5A in the insertion direction (front-rear direction Y) of the reinforcement part main body 50, and the cut edge 5A is located at the other end 5A of the inclined surface 50a, and the locking arm 314 slides on the inclined surface 50a of the reinforcement structure 5 to lock the cut edge 5A. By providing such an inclined surface 50a, when the housing 3 is inserted into the shielded space 20, the housing 3 is inserted with a small insertion force, and the cut edge 5A is locked by the locking arm 314 as the housing 3 is inserted into the shielded space 20. This improves the ease of assembly.

[0038] In addition, the best configurations and methods for implementing the present invention are disclosed in the above description, but the present invention is not limited thereto. That is, the present invention has been mainly illustrated and described with reference to specific embodiments, but those skilled in the art can make various modifications to the above-described embodiments in terms of shape, material, quantity, and other detailed configurations without departing from the scope of the technical idea and purpose of the present invention. Therefore, the descriptions limiting the shapes, materials, etc. disclosed above are illustrative descriptions for the purpose of facilitating understanding of the present invention, and do not limit the present invention, and therefore descriptions of the names of components that are free of some or all of the limitations on the shapes, materials, etc. are included in the present invention. [Explanation of symbols]

[0039] 1. Shield structure 10 Electric wire 2 Shield Shell 20 Shielded Space 21 Shell body 21B Bottom wall (at least one wall part) 23 Body fastening part (extension plate) 3. Housing 314 Locking Arm 4 Locking structure 5 Reinforcement structure 5A Cut edge, locked part 50a slope Y1 Front (insertion direction into shield space)

Claims

1. A shield structure that is fixed to an attachment target on a vehicle body and supported at a predetermined position on an electric wire, a shielded shell including a cylindrical shell body having at least one wall portion and defining a shielded space, and a reinforcing structure reinforcing the shell body; a housing that holds the electric wire and is inserted into the shielded space; a locking structure for maintaining the housing in the shielded space, the locking structure includes a locking arm provided on the housing and a locked portion provided on the shield shell and locked to the locking arm, The reinforcing structure includes a cut edge formed by cutting out the wall portion and is configured to bulge inwardly into the shielded space, A shield structure, characterized in that the locked portion is provided on the cut edge.

2. the shield shell has an extension plate that is continuous with the wall portion and extends in a direction away from the shell main body, The shielding structure according to claim 1 , wherein the reinforcing structure is provided continuously from the extension plate to the wall portion in an insertion direction in which the housing is inserted into the shielded space.

3. the reinforcing structure has an inclined surface that is inclined so as to protrude toward the inside of the shielded space as the housing progresses in an insertion direction into the shielded space, The inclined surface is provided continuously from one end to the other end of the reinforcement structure in the insertion direction, 3. The shield structure according to claim 1, wherein the cut edge is located at the other end in the insertion direction.

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