JP6434200B2 - Waterproof structure of cable housing case - Google Patents

Description

  The present invention relates to a waterproof structure for a cable housing case.

  Usually, the case for housing the cable is configured by combining a first divided body and a second divided body that are separately molded in order to facilitate molding. Even if a concave-convex bond that forms a labyrinth is employed as the coupling between the mating surfaces of the first segment and the second segment, a slight gap may be formed between the mating surfaces. There is a risk that moisture or the like may enter the case from the gap.

  Therefore, for example, Patent Document 1 proposes a structure in which potting resin is filled in a case in order to improve waterproofness.

JP 2012-195164 A

However, when the cable is in contact with the boundary line between the mating surfaces of the first member and the second member during potting, the potting resin cannot cover the boundary line. For this reason, there is a possibility that moisture or the like may enter the case from the outside of the case through the boundary line between the mating surfaces of both members.
Therefore, an object of the present invention is to provide a waterproof structure for a cable housing case that can suppress the intrusion of moisture and the like.

In order to achieve the object, the invention of claim 1 is a combination of a cable (30) and at least a first divided body (28; 28B to 28H) and a second divided body (29; 29A; 29C to 29H). A case (32) configured to divide the accommodating portion (31) for accommodating the cable, and a potting resin (33) filled in the accommodating portion, wherein the first divided body includes the accommodating portion 1st inner surface (61; 61B-61H) and a 1st mating surface (71), and the said 2nd division body is the 2nd inner surface (part of the said accommodating part) ( 62; 62A; 62C to 62H) and a second mating surface (72) abutted against the first mating surface, and the first mating surface and the second mating surface face the inside of the accommodating portion. Forming a boundary line (BL), said first inner surface and front At least one of the second inner surface, wherein in a state in contact with the cable, undulations between itself or each other, to be spaced apart so as to avoid a pre-Symbol boundary contact between said cable (81; 81, 82; 82; 83H; 91, 92; 91; 92; 81E, 82E, 91, 92; 93, 94), and the boundary line separated by the undulations to avoid contact with each other; A waterproof structure (101 to 110) of a cable housing case filled with the potting resin between the cables is provided.

In addition, although the alphanumeric character in a parenthesis represents the corresponding component etc. in embodiment mentioned later, this does not mean that this invention should be limited to those embodiment as a matter of course. The same applies hereinafter.
Further, as described in claim 2, as the undulating portion, a groove (81; 81, 82; 82; 83H; 81E, 82E) along the boundary line is formed on at least one of the first inner surface and the second inner surface. It may be formed.

According to a third aspect of the present invention, convex portions (91, 92) close to the boundary line may be formed on at least one of the first inner surface and the second inner surface as the undulating portion.
In addition, as in claim 4, any one of the first inner surface and the second inner surface protrudes more inside the housing portion than the other, so that it is between the first surface and the second surface. In addition, step portions (93, 94) as the undulating portions may be provided.

  In addition, as in claim 5, an inclined surface (95, 96) close to the boundary line may be formed on at least one of the first inner surface and the second inner surface.

  According to the first aspect of the present invention, the boundary line between the first mating surface and the second mating surface facing the inside of the housing portion is separated from the cable by the function of the undulating portion. Potting resin is surely filled between and the boundary line is covered. Thereby, it can suppress that a water | moisture content etc. penetrate | invade in a case through the boundary line of both mating surfaces from the exterior of a case.

According to the invention of claim 2, the cable and the boundary line can be separated by the groove as the undulating portion formed on at least one of the first inner surface and the second inner surface. The potting resin filled in the groove during potting can cover the boundary line and ensure sealing performance.
According to the invention of claim 3, the convex portion as the undulating portion that is provided on at least one of the first inner surface and the second inner surface and is close to the boundary line abuts the cable, so that the cable and the boundary line Can be separated from each other. Sealing performance can be ensured by filling the spaced gap with the potting resin to cover the boundary portion.

  According to the invention of claim 4, any one of the first inner surface and the second inner surface is formed between the first inner surface and the second inner surface by projecting to the inner side of the accommodating portion than the other. The cable and the boundary line can be separated by the stepped portion as the undulating portion. Sealing performance can be ensured by filling the spaced gap with the potting resin to cover the boundary portion.

  According to the invention of claim 5, since the inclined surface provided on at least one of the first inner surface and the second inner surface is close to the boundary line, when assembling the first divided body and the second divided body. , A part of the cable is hardly sandwiched between the two divided bodies, and damage to the cable can be suppressed.

It is a mimetic diagram showing a schematic structure of an electric power steering device to which a waterproof structure of a cable housing case of a 1st embodiment of the present invention was applied. It is a schematic sectional drawing of ECU and the connector to which the waterproof structure of the cable storage case of 1st Embodiment was applied, and (a) shows the state after manufacture, (b) is the time of manufacture The potting process is shown. It is a general | schematic disassembled perspective view of the subcase and connector of ECU. It is a disassembled perspective view of the 1st division body and the 2nd division body of the case (equivalent to a cable storage case) of a connector. It is the perspective view which turned over and looked at the 1st division object which constitutes a part of case of a connector. It is a cross-sectional view of the cable insertion part which divides the accommodating part of the case of a connector. It is an expanded sectional view of the principal part of the cable insertion part which formed the groove | channel in the inner surface of the 1st division body, (a) shows the state before a cable insertion and before potting, (b) is after a cable insertion. Shows the state after potting. It is sectional drawing of the principal part of the cable penetration part of 2nd Embodiment of this invention, and has shown the example which forms a groove | channel in the inner surface of both division bodies. It is sectional drawing of the principal part of the cable penetration part of 3rd Embodiment of this invention, and the example which forms a groove | channel in the inner surface of a 2nd division body is shown. (A) is sectional drawing of the principal part of the cable penetration part of 4th Embodiment of this invention, and has shown the example which provided the convex part in the inner surface of both division bodies. (B) is sectional drawing of the principal part of the cable insertion part of 5th Embodiment of this invention, and has shown the example which forms a convex part only in the 1st inner surface of both 1st division bodies. (C) is sectional drawing of the principal part of the cable insertion part of 6th Embodiment of this invention, and has shown the example which forms a convex part only in a 2nd inner surface only in a 2nd division body. It is sectional drawing of the principal part of the cable penetration part of 7th Embodiment of this invention, and has shown the example which provides both the groove | channel as a undulation part, and the convex part as a undulation part in the inner surface of both division bodies. It is sectional drawing of the principal part of the cable penetration part of 8th Embodiment of this invention, The 1st inner surface protrudes rather than the 2nd inner surface, and the example which forms an undulation part between both division bodies is shown. It is sectional drawing of the principal part of the cable penetration part of 9th Embodiment of this invention, and the 2nd inner surface protrudes rather than the 1st inner surface, and the example which forms an undulation part between both division bodies is shown. It is sectional drawing of the principal part of the cable penetration part of 10th Embodiment of this invention, and has shown the example which provides the inclined surface which adjoins a boundary line in the inner surface of both division bodies.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a schematic diagram showing a schematic configuration of an electric power steering apparatus 1 as a vehicle steering apparatus to which a resin potting structure according to a first embodiment of the present invention is applied. Referring to FIG. 1, an electric power steering apparatus 1 includes a steering wheel 2 as a steering member, a steering mechanism 4 that steers a steered wheel 3 in conjunction with rotation of the steering wheel 2, and steering of a driver. And a steering assist mechanism 5 for assisting. The steering wheel 2 and the steering mechanism 4 are mechanically coupled via a steering shaft 6 and an intermediate shaft 7.

In the present embodiment, a description will be given based on an example in which the steering assist mechanism 5 applies assist force (steering assist force) to the steering shaft 6. However, the present invention can also be applied to a structure in which the steering assist mechanism 5 applies an assist force to a pinion shaft described later, or a structure in which the steering assist mechanism 5 applies an assist force to a rack shaft described later.
The steering shaft 6 includes an input shaft 8 connected to the steering wheel 2 and an output shaft 9 connected to the intermediate shaft 7. The input shaft 8 and the output shaft 9 are connected via a torsion bar 10 so as to be relatively rotatable on the same axis.

  A torque sensor 11 disposed around the steering shaft 6 detects the steering torque input to the steering wheel 2 based on the relative rotational displacement amounts of the input shaft 8 and the output shaft 9. The torque detection result of the torque sensor 11 is input to an ECU (Electronic Control Unit) 12 as an electronic unit. Further, the vehicle speed detection result from the vehicle speed sensor 90 is input to the ECU 12. The intermediate shaft 7 connects the steering shaft 6 and the steering mechanism 4.

The steered mechanism 4 includes a rack and pinion mechanism including a pinion shaft 13 and a rack shaft 14 as a steered shaft. A steered wheel 3 is connected to each end of the rack shaft 14 via a tie rod 15 and a knuckle arm (not shown).
The pinion shaft 13 is connected to the intermediate shaft 7. The pinion shaft 13 rotates in conjunction with the steering of the steering wheel 2. A pinion 16 is provided at the tip (lower end in FIG. 1) of the pinion shaft 13.

  The rack shaft 14 extends linearly along the left-right direction of the automobile. A rack 17 that meshes with the pinion 16 is formed in the middle of the rack shaft 14 in the axial direction. By the pinion 16 and the rack 17, the rotation of the pinion shaft 13 is converted into the axial movement of the rack shaft 14. The steered wheel 3 can be steered by moving the rack shaft 14 in the axial direction.

When the steering wheel 2 is steered (rotated), this rotation is transmitted to the pinion shaft 13 via the steering shaft 6 and the intermediate shaft 7. The rotation of the pinion shaft 13 is converted into an axial movement of the rack shaft 14 by the pinion 16 and the rack 17. Thereby, the steered wheel 3 is steered.
The steering assist mechanism 5 includes an electric motor 18 for assisting steering and a speed reduction mechanism 19 for transmitting the output torque of the electric motor 18 to the steering mechanism 4. The speed reduction mechanism 19 includes a worm shaft 20 as a drive gear to which the driving force of the electric motor 18 is input, and a worm wheel 21 as a driven gear that meshes with the worm shaft 20.

The worm shaft 20 is connected to an output shaft (not shown) of the electric motor 18 through a joint (not shown). The worm shaft 20 is rotationally driven by the electric motor 18. Further, the worm wheel 21 is connected to the steering shaft 6 so as to be integrally rotatable.
When the electric motor 18 rotationally drives the worm shaft 20, the worm wheel 21 is rotationally driven by the worm shaft 20, and the worm wheel 21 and the steering shaft 6 rotate integrally. As a result, the steering assist force is transmitted to the steering shaft 6.

  The electric motor 18 is controlled by the ECU 12. The ECU 12 controls the electric motor 18 based on the torque detection result from the torque sensor 11 and the vehicle speed detection result from the vehicle speed sensor 22. Specifically, the ECU 12 determines a target assist amount using a map in which the relationship between the torque and the target assist amount is stored for each vehicle speed, and controls the assist force generated by the electric motor 18 to approach the target assist amount. To do.

FIG. 2A is a schematic cross-sectional view of the ECU 12 and a connector 23 that is attached to the ECU 12 and to which the waterproof structure 100 of the cable housing case of the present embodiment is applied.
The ECU 12 includes a main case 25 made of, for example, an aluminum alloy that houses a substrate 24 and other electronic components (not shown), and a sub case 27 made of, for example, a synthetic resin that houses a first terminal 26 and other terminal groups. Yes. In the sub case 27, for example, a connector element (for example, the first terminal 26 or the like) for connecting wiring for taking in a signal from the torque sensor 11 to the ECU 12, an integrated ECU on the vehicle side, and a CAN (Controller Area Network). The connector element (for example, terminal) which connects the wiring for transmitting a signal via the terminal is accommodated.

  The waterproof structure 100 of the cable housing case applied to the connector 23 is configured by combining the first divided body 28 and the second divided body 29 (see also FIG. 4 to be described later), and a housing portion 31 for housing the cable 30. Insulating case 32 (cable housing case) and potting resin 33 filled in housing portion 31 are provided. As shown in FIG. 2B, the potting resin 33 is formed by curing a liquid potting resin 33 </ b> L filled in the sub case 27 and the case 32 of the connector 23.

  As shown in FIG. 2A, for example, a rectangular attachment hole 35 is provided in the outer wall 34 of the main case 25, and the sub case 27 is attached to the attachment hole 35. The sub case 27 covers the attachment hole 35 and a part of the sub case 27 protrudes from the attachment hole 35. In the sub case 27, a first terminal 26 extending from the substrate 24 disposed in the main case 25 is received through the bottom plate 36 of the sub case 27. The substrate 24 is held in a recess 36 a provided on the lower surface of the bottom plate 36. One end of the first terminal 26 is connected to the conductive portion of the substrate 24 in the main case 25.

The case 32 of the connector 23 includes a wall portion 37 attached to the sub case 27, a cable insertion portion 38 connected to the wall portion 37 and through which a cable is inserted, and the wall portion 37 on the opposite side of the cable insertion portion 38. And a terminal holding portion 40 that supports a second terminal 39 that extends and is connected to the first terminal 26 in the sub case 27.
The wall portion 37 constitutes a part of the wall of the sub case 27 in a state of being attached to the sub case 27, and defines a part of the accommodating portion 41 formed in the sub case 27. The accommodating portion 31 formed in the cable insertion portion 38 accommodates the cable 30 that has been inserted to be pulled into the sub case 27. The accommodating portion 31 in the case 32 of the connector 23 and the accommodating portion 41 in the sub case 27 are in communication with each other, and liquid potting resin 33L is filled into the accommodating portions 31 and 41 during potting. ing. A part of the potting resin 33 is filled and solidified between the inner periphery 31 a of the housing portion 31 of the connector 23 and the outer periphery 30 a of the cable 30.

The cable 30 includes a plurality of covered electric wires 42 and an insulating tube 43 made of, for example, synthetic resin through which the covered electric wires 42 are inserted. The end portion of the covered electric wire 42 is peeled off, and the conductor end portion 44 is connected to the second terminal 39 by resistance welding.
An annular protrusion 45 that is in close contact with the outer periphery 30 a of the cable 30 (the outer periphery of the tube 43) is provided on the inner periphery 31 a of the housing portion 31 of the cable insertion portion 38. When the liquid potting resin 33L before the annular protrusion 45 is cured is injected into the housing part 41 and the housing part 31, as shown in FIG. Leakage downward (in the drawing) is suppressed by the action of the annular protrusion 45. The cable insertion portion 38 of the case 32 of the connector 23 is provided with an air escape hole 46 for releasing air during resin potting.

Referring to FIG. 3, the sub case 27 connects the first wall 47 and the second wall 48 extending from the bottom plate 36 in parallel with each other, and one opposing end of the first wall 47 and the second wall 48. A third wall 49 having an open portion 49a and a fourth wall 50 having an open portion 50a formed by connecting the other opposing ends of the first wall 47 and the second wall 48 are provided.
The sub case 27 has a first insertion groove 51 and a second insertion groove 52 provided in the first wall 47 and the second wall 48 in the vicinity of the third wall 49, respectively.

The first side edge 53 and the second side edge 54 of the wall 37 of the case 32 of the connector 23 are inserted into the first insertion groove 51 and the second insertion groove 52 of the sub case 27, respectively. In a state where the open portion 49a of the third wall 49 is covered and the open portion 50a of the fourth wall 59 is covered by an element not shown (a wall portion facing the wall portion 37 and corresponding to the wall portion 37). a bottom plate 36 and each wall 48 to 50 of the sub-case 27, the wall 37 of the connector 23, the by the unillustrated elements (wall portion corresponding to the wall portion 37), housing portion 41 of the sub-case 27 is partitioned Will be.

With reference to FIG. 4 which is a divided perspective view of the connector 23, as described above, the case 32 of the connector 23 is configured by combining the first divided body 28 and the second divided body 29. The first split body 28 has a first half 381 of the first half 371 and a cable inserted through portion 38 of the wall portion 37, the second split body 29, the second half of the walls 37 372 and and a second half 382 of the cable inserted through portion 38.

Wall 37 in combination both halves 371 and 372 of the wall portion 37 is formed, the cable interpolation communicating portion 38 is formed by combining the two halves 381, 382 of the cable inserted through portion 38. The terminal holding part 40 is provided in the second divided body 29. Elastically deformable annular hook 55, 56 provided in the (first half 381 in the illustrated example) one half of the two halves 381, 382 of the cable inserted through part 38, the other half ( In the illustrated example, the coupling state of both the divided bodies 28 and 29 is firmly held by hooking and engaging with the engaging projections 57 and 58 provided on the second half 382).

Further, with reference to Figure 6. Figure 5, and is a cross-sectional view of a cable inserted through portion 38 is a perspective view of a state in which turned over first divided member 28 of FIG. 4, the first split body 28, the case 32 A first inner surface 61 that divides a part of the housing portion 31 and a first mating surface 71 are provided. With reference to FIGS. 4 and 6, the second divided body 29 is a second alignment that is abutted against the second inner surface 62 that defines a part of the accommodating portion 31 and the first mating surface 71 of the first divided body 28. Surface 72.

As shown in FIG. 5, the first mating surface 71 of the first split body 28 extends from the first half 371 of the wall portion 37 to the first half 381 of the cable inserted through portion 38. Further, as shown in FIG. 4, the second mating surface 72 of the second split body 29 extends from the second half 382 of the wall portion 37 to the second half 382 of the cable inserted through portion 38.
The mating surfaces 71 and 72 of the two divided bodies 28 and 29 are concavo-convexly connected to each other. That is, it is provided on one of the mating surfaces 71 and 72 of the two divided bodies 28 and 29 (a pair of second mating surfaces 72 of the second divided body 29 in the illustrated example), and one of the mating surfaces (a pair of first mating surfaces 72). The connecting projection 73 extending along the direction in which the two mating surfaces 72 extend is provided on the other mating surface (the pair of first mating surfaces 71 in the illustrated example), and the other mating surface (the pair of first mating surfaces). Fitting (so-called stamping fitting) is performed in a coupling concave groove 74 extending along the direction in which the surface 71) extends. Thereby, the labyrinth structure is comprised and both the division bodies 28 and 29 are combined liquid-tightly.

  As shown in FIG. 6 and FIG. 7A, the first mating surface 71 and the second mating surface 72 form a boundary line BL that faces the accommodating portion 31. At least one of the first inner surface 61 and the second inner surface 62 (first inner surface 61 in the present embodiment) is provided with a groove 81 as an undulating portion that separates the boundary line BL and the cable 30 along the boundary line BL. . As shown in FIG. 7B, the potting resin 33 is surely filled between the boundary line BL and the cable 30 which are separated from each other by the action of the groove 81 at the time of potting. Since the groove 81 extends along the direction in which the cable insertion portion 38 extends and the end portion is open, the potting resin 33 is reliably filled in the groove 81.

  Specifically, as shown in FIG. 7A, the first mating surface 71 is formed on the first portion 711, which is an inner portion closer to the first inner surface 61 than the coupling groove 74, and the coupling groove 74. On the other hand, it has the 2nd part 712 which is an outer side part on the opposite side to the 1st part 711. FIG. One inner wall surface and bottom of the groove 81 as the undulating portion are provided in the first divided body 28, and the other inner wall surface of the groove 81 is constituted by a part of the second mating surface 72. Regarding the height from the bottom of the coupling groove 74, the height of a part of the first part 711 is made lower than the height of the remaining part of the first part 711, so It can also be said that a gap for partitioning the groove 81 is formed between the two mating surfaces 72.

  According to the present embodiment, the boundary line BL between the first mating surface 71 and the second mating surface 72 facing the inside of the housing portion 31 is separated from the cable 30 by the function of the undulating portion (groove 81). When potting, as shown in FIG. 7B, the potting resin 33 is reliably filled between the boundary line BL and the cable 30 to cover the boundary line BL. Thereby, it is possible to suppress moisture and the like from entering the case 32 from the outside of the case 32 (cable housing case) through the boundary line BL of the mating surfaces 71 and 72.

Further, the cable 30 and the boundary line BL are separated from each other by the groove 81 as the undulating portion formed on at least one of the first inner surface 61 and the second inner surface 62 (the first inner surface 61 in the present embodiment). it can. The potting resin 33 filled in the groove 81 at the time of potting can cover the boundary line BL and ensure sealing performance.
In 1st Embodiment of FIG.7 (b), although the groove | channel 81 which follows the boundary line BL is provided in the 1st inner surface 61 of the 1st division body 28, it is not restricted to this. The groove along the boundary line BL is provided on at least one of the first inner surface and the second inner surface as shown in a second embodiment of FIG. 8 and a third embodiment of FIG. As in the first embodiment, moisture or the like can be prevented from entering the case 32 through the boundary line BL.

  That is, FIG. 8 is a cross-sectional view of a main part of the waterproof structure 102 of the cable housing case according to the second embodiment of the present invention. Referring to FIG. 8, in the second embodiment, a groove 81 provided on the first inner surface 61 of the first divided body 28 and a groove 82 provided on the second inner surface 62A of the second divided body 29A are provided. A single groove is formed as a whole. In the components of the second embodiment of FIG. 8, the same reference numerals as those of the first embodiment of FIG. 7B are assigned to the same components as those of the first embodiment of FIG. 7B. It is attached.

  FIG. 9 is a cross-sectional view of a main part of the waterproof structure 103 of the cable housing case according to the third embodiment of the present invention. Referring to FIG. 9, the third embodiment is different from the second embodiment of FIG. 8 in the first inner surface 61B of the first divided body 28B and the first inner surface 61 of the second embodiment of FIG. The configuration corresponding to the groove 81 is eliminated, and the groove 82 is formed only on the second inner surface 62A of the second divided body 29A. In the components of the third embodiment in FIG. 9, the same components as those in the second embodiment in FIG. 8 are denoted by the same reference symbols as the components in the second embodiment in FIG.

  Further, in the first to third embodiments described above, a groove as a undulating portion is provided in order to separate the distance between the boundary line BL and the cable 30, but in place of this, FIG. The cable housing case waterproof structure 104 of the fourth embodiment, the cable housing case waterproof structure 105 of FIG. 10 (b), and the cable housing case of the sixth embodiment of FIG. 10 (c). As in the waterproof structure 106, at least one of the first inner surface and the second inner surface may be provided with a convex portion as an undulating portion. Also in the fourth to sixth embodiments, the potting resin 33 is surely filled between the boundary line BL and the cable 30 and covers the boundary line BL, so that moisture or the like is contained in the case 32 through the boundary line BL. Intrusion can be suppressed.

  That is, in the waterproof structure 104 of the cable housing case of the fourth embodiment in FIG. 10A, the rib-shaped first convex portion 91 close to the boundary line BL is provided on the first inner surface 61C of the first divided body 28C. A rib-like second convex portion 92 that is close to the boundary line BL is provided on the second inner surface 62C of the second divided body 29C. That is, the first convex portion 91 and the second convex portion 92 that are close to the boundary line BL are formed on the first inner surface 61C and the second inner surface 62C, respectively. Both convex portions 91 and 92 extend in a direction (for example, a direction orthogonal) intersecting the direction in which the boundary line BL extends [the direction orthogonal to the paper surface in FIG. 10A].

Also, the fifth embodiment of FIG. 10B is different from the fourth embodiment of FIG. 10A in the second inner surface 62D of the second divided body 29D in the fourth embodiment of FIG. The configuration corresponding to the second convex portion 92 is abolished, and the first convex portion 91 that is a rib-shaped convex portion is provided only on the first inner surface 61C of the inner surfaces 61C and 62D.
Further, the sixth embodiment of FIG. 10C is different from the fourth embodiment of FIG. 10A on the first inner surface 62D of the first divided body 28D in the fourth embodiment of FIG. The configuration corresponding to the first convex portion 91 is abolished, and the second convex portion 92 which is a rib-shaped convex portion is provided only on the second inner surface 62C of the inner surfaces 61D and 62C. In the constituent elements of the respective embodiments of FIGS. 10A to 10C, the same constituent elements as those of the first embodiment of FIG. 7B are referred to the constituent elements of the first embodiment of FIG. The same reference numerals as those in FIG.

  Next, FIG. 11 shows a waterproof structure 107 for a cable housing case according to a seventh embodiment of the present invention. The seventh embodiment is different from the fourth embodiment of FIG. 10A in that both the first inner surface 61E of the first divided body 28E and the second inner surface 62E of the second divided body 29E are on the boundary line BL. It is in the point which provided the groove | channels 81E and 82E which follow. In the constituent elements of the seventh embodiment in FIG. 11, the same reference numerals as those in the fourth embodiment in FIG. 10A are assigned to the same constituent elements as those in the fourth embodiment in FIG. It is attached.

In the seventh embodiment, the boundary line BL and the cable 30 can be separated more reliably. Although not shown, in the seventh embodiment of FIG. 11, either one of the grooves 81 </ b> E and 82 </ b> E may be eliminated, or any one of the convex portions 91 and 92 may be eliminated.
In the fourth to sixth embodiments of FIGS. 10A to 10C, the convex portion is provided on at least one of the first inner surface and the second inner surface, whereas the cable of the eighth embodiment of FIG. In the waterproof structure 108 of the housing case, the second inner surface 62F of the first divided body 28F is protruded from the second inner surface 62F of the second divided body 29F, and the boundary line BL and the cable 30 are between the inner surfaces 61F and 62F. A stepped portion 93 is provided as a undulating portion that separates.

Further, in the waterproof structure 109 for the cable housing case of the ninth embodiment of FIG. 13, the second inner surface 62G of the first divided body 28G protrudes from the second inner surface 62G of the second divided body 29G, and both inner surfaces 61G, Between 62G, the level | step-difference part 94 as a raising / lowering part which separates the boundary line BL and the cable 30 is provided.
Also in the eighth and ninth embodiments, since the potting resin 33 is reliably filled between the boundary line BL and the cable 30 and covers the boundary line BL, moisture or the like enters the case 32 through the boundary line BL. Can be prevented from entering.

  Next, FIG. 14 shows a main part of the waterproof structure 110 of the cable housing case of the tenth embodiment of the present invention. Referring to FIG. 14, in the present embodiment, at least a part (all in the example of FIG. 14) of groove 83H formed along boundary line BL is formed on first inner surface 61H of first divided body 28H. The inclined surface 95 and the inclined surface 96 formed on the second inner surface 62H of the second divided body 29H are partitioned. The inclined surface 95 and the inclined surface 96 are inclined in opposite directions and are close to the boundary line BL. Although not shown, either one of the inclined surface 95 and the inclined surface 96 may be eliminated.

  According to the present embodiment, it is possible to prevent moisture and the like from entering the case 32 through the boundary line BL. In addition, since the inclined surfaces 95 and 96 provided on at least one of the first inner surface 61H and the second inner surface 62H are close to the boundary line BL, when assembling the first divided body 28H and the second divided body 29H, A part of the cable 30 is hardly sandwiched between the two divided bodies 28H and 29H, and damage to the cable 30 can be suppressed.

The present invention is not limited to the above-described embodiment, and includes, for example, a pair of inner wall surfaces of the groove 81 in the first embodiment of FIG. 7 and the grooves 81 and 82 in the second embodiment of FIG. A pair of inner wall surfaces of the groove or a pair of inner wall surfaces of the groove 82 in the third embodiment of FIG. 9 may be formed by a pair of inclined surfaces (not shown) opposite to each other that expand toward the cable side. .
Further, the bottoms of the pair of grooves 81E and 82E in the seventh embodiment of FIG. 11 may be formed by a pair of inclined surfaces (not shown) opposite to each other that expand toward the cable side. Further, the stepped portion 93 in the eighth embodiment of FIG. 12 and the stepped portion 94 in the ninth embodiment of FIG. 13 may be formed by an inclined surface (not shown) inclined with respect to the mating surface. In addition, various modifications can be made within the scope of the claims of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Electric power steering device (vehicle steering device), 5 ... Steering assist mechanism, 12 ... ECU, 18 ... Electric motor, 23 ... Connector, 28, 28B-28H ... 1st division body, 29, 29A, 29C-29H ... second divided body, 30 ... cable, 31 ... accommodating part, 31a ... inner periphery, 33 ... potting resin, 32 ... case (cable accommodating case), 33L ... liquid potting resin, 38 ... cable insertion part, 61, 61B ˜61H—first inner surface, 62, 62A, 62C to 62H—second inner surface, 71—first mating surface, 72—second mating surface, 73—coupling protrusion, 74—coupling groove, 81, 82, 81E , 82E, 83H ... groove (undulation), 91 ... first projection (undulation), 92 ... second projection (undulation), 93,94 ... step (undulation), 95,96 ... inclined surface 101-110 ... K Waterproof structure of Le housing case, BL ... boundary line

Claims (5)

Cable and
A case that is configured by combining at least a first divided body and a second divided body, and divides a housing portion that houses the cable; and
A potting resin filled in the housing part,
The first divided body includes a first inner surface that divides a part of the accommodating portion, and a first mating surface,
The second divided body includes a second inner surface that defines a part of the housing portion, and a second mating surface that is abutted against the first mating surface,
The first mating surface and the second mating surface form a boundary line facing the inside of the accommodating portion,
Wherein at least one of the first inner surface and said second inner surface undulations, while in contact with the cable, between itself and each other, to be spaced apart so as to avoid a pre-Symbol boundary contact between said cable Part
A waterproof structure of a cable housing case in which the potting resin is filled between the boundary line and the cable separated so as to avoid contact with each other by the undulating portion.   The waterproof structure for a cable housing case according to claim 1, wherein a groove along the boundary line is formed in at least one of the first inner surface and the second inner surface as the undulating portion.   3. The waterproof structure for a cable housing case according to claim 1, wherein, as the undulating portion, a convex portion close to the boundary line is formed on at least one of the first inner surface and the second inner surface.   2. The undulation according to claim 1, wherein any one of the first inner surface and the second inner surface protrudes more inside the housing portion than the other, so that the undulation is between the first inner surface and the second inner surface. Waterproof structure of a cable housing case provided with a stepped portion as a portion.   The waterproof structure for a cable housing case according to any one of claims 1 to 4, wherein an inclined surface close to the boundary line is formed on at least one of the first inner surface and the second inner surface.

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