connector

Abstract

To provide a connector capable of preventing forgetting to assemble a seal or a seal retainer. The connector is provided with a wire harness 3 having a harness side terminal 30 attached thereto, and a female housing 10 having a shield shell 2 disposed therein. The female housing 10 is provided with a retaining portion main body 12 and a harness holding portion 11. The female housing 10 is provided with a wire seal 7 to be attached to the harness holding portion 11, a seal retainer 8 to regulate the removal of the wire seal 7, and a cover 9 to cover the seal retainer 8. The cover 9 is provided with a retainer confirmation hole 94 and a second seal confirmation hole 95 through which the seal retainer 8 and wire seal 7 attached to the harness holding portion 11 can be confirmed. The seal retainer 8 is provided with a first seal confirmation hole 82 through which the wire seal 7 can be confirmed. The second seal confirmation hole 95 is configured so that the wire seal 7 can be confirmed via the first seal confirmation hole 82.

Description

[Technical field]

[0001] The present invention relates to a connector that is attached to, for example, a wire harness and connected to a device such as a motor. [Background technology]

[0002] Electrical equipment installed in automobiles and the like is connected to other electrical equipment and power supplies via wire harnesses, which are bundles of insulated electric wires, to form electrical circuits. In this case, the wire harness is connected to the electrical equipment and the power supply by connectors attached to each of the electrical equipment and the power supply.

[0003] For example, a harness-side connector as shown in Patent Document 1 is connected to a device-side connector provided on a device such as a motor. Specifically, a terminal of a connector provided on the harness side is connected to a terminal of a connector provided on the device side, and the connectors are electrically connected to each other.

[0004] In addition, some of these connectors have a seal that seals between the electric wires introduced into the housing and the housing, and a seal retainer that prevents the seal from coming loose, arranged inside the housing. This prevents water from entering the housing and ensures waterproofing. However, if a connector is used without installing the seal or seal retainer, there is a risk of water entering the housing and causing a short circuit or other problems. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2012-109035 A Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a connector that can prevent forgetting to install a seal or a seal retainer. [Means for solving the problem]

[0007] The present invention is a connector that mates with a mating connector to connect terminals provided on the respective connectors, the connector comprising: an electric wire having a terminal attached to a tip; and a housing in which the terminal is disposed, the housing being provided with a terminal accommodating portion in which the terminal is disposed, and an electric wire holding portion that communicates with the terminal accommodating portion and holds the electric wire, the housing being provided with a wire insertion hole through which the electric wire is inserted, a seal that is attached to the electric wire holding portion to seal the space between the electric wire and the electric wire holding portion, a seal retainer that is attached to the electric wire holding portion and prevents the seal from being removed from the electric wire holding portion, and a cover that is attached to the electric wire holding portion and covers the seal retainer, the cover being provided with a confirmation portion that allows the seal retainer and the seal attached to the electric wire holding portion to be confirmed from the outside in the direction of attachment to the electric wire holding portion, the seal retainer being provided with a seal confirmation portion that allows the seal to be confirmed, the confirmation portion being configured to allow the seal to be confirmed via the seal confirmation portion.

[0008] The confirmation portion and the seal confirmation portion may be a through hole or a notch, or part or all of the cover and the seal retainer may be made of a highly visible material. Furthermore, the confirmation unit and the seal confirmation unit may be configured to be capable of confirmation by various methods, such as visual confirmation, confirmation by image processing, and confirmation of position using laser light or a probe, etc.

[0009] According to the present invention, it is possible to prevent forgetting to assemble the seal or the seal retainer to the connector. In detail, the housing is constituted together with a terminal accommodating section in which the terminal is disposed, and the wire holding section that holds the wire has a wire insertion hole through which the wire is inserted. A seal that seals between the wire and the wire holding section, a seal retainer that restricts removal of the seal from the wire holding section, and a cover that covers the seal retainer are attached. Furthermore, the cover is provided with a confirmation section that allows the seal retainer and the seal attached to the wire holding section to be confirmed from the outside in the direction of attachment to the wire holding section, and the seal retainer is provided with a seal confirmation section that allows the seal to be confirmed. The confirmation section is configured to be able to confirm the seal via the seal confirmation section. Therefore, when assembly is completed, the seal and the seal retainer disposed inside can be confirmed from the outside of the connector through the confirmation section.

[0010] In other words, if at least one of the seal and the seal retainer cannot be confirmed from the confirmation portion, it means that at least one of the seal and the seal retainer is not assembled to the housing, so it is possible to prevent the seal and the seal retainer from being forgotten to be assembled to the connector. Therefore, it is possible to prevent a malfunction such as a short circuit caused by inadvertent water penetration into the inside of a connector to which the seal and the seal retainer have been forgotten to be assembled.

[0011] As an aspect of the present invention, the seal check portion may penetrate the seal retainer in the mounting direction. According to the present invention, the seal can be confirmed by the seal confirmation portion having a simple structure.

[0012] As a further aspect of the present invention, the confirmation portion may be a viewing window that can be viewed from the outside in the mounting direction. According to the present invention, since the confirmation portion is formed in a window shape, a decrease in strength of the cover can be suppressed compared to when the confirmation portion is formed by a notch or the like.

[0013] As a further aspect of the present invention, the viewing window may penetrate the cover in the mounting direction. According to the present invention, the seal and the seal retainer can be checked through the viewing window, which has a simple structure.

[0014] In addition, the viewing window that penetrates in the mounting direction, like, for example, a confirmation hole that penetrates in the contact direction between the seal mounted on the wire holding portion and the wire holding portion, can ensure stable waterproofing without reducing the water-stopping ability of the seal.

[0015] In another aspect of the present invention, the seal confirmation portion provided on the seal retainer may be a retainer side seal confirmation portion, and the confirmation portion may be provided with a cover side retainer confirmation portion that confirms the seal retainer, and a cover side seal confirmation portion that confirms the seal via the retainer side seal confirmation portion.

[0016] According to this invention, the cover-side seal confirmation portion provided on the cover allows the seal to be confirmed from the outside via the retainer-side seal confirmation portion, and the cover-side retainer confirmation portion allows the seal retainer to be confirmed from the outside. Therefore, the cover-side retainer confirmation portion and the retainer-side seal confirmation portion allow the seal and the seal retainer to be confirmed individually, respectively, and it can be reliably confirmed that the seal and the seal retainer are attached inside the wire holding portion.

[0017] As a further aspect of the present invention, a plurality of the electric wires may be provided, and a plurality of the seals, the seal retainers and the covers may be provided in accordance with the number of the electric wires. This invention allows the connector to be easily assembled.

[0018] In detail, the seals, the seal retainers, and the covers, which are provided in plurality according to the number of electric wires, can be inserted one by one and installed in the installation direction, which improves the operability of the seals, the seal retainers, and the covers and the ease of assembly of the connector, compared to a case in which a plurality of electric wires are inserted into one seal, seal retainer, and cover, respectively.

[0019] As a further aspect of the present invention, a locking and fixing portion that locks and fixes the cover to the housing may be provided. According to this invention, the cover can be easily attached and fixed to the housing. Also, the cover attached to the housing can be removed by releasing the lock of the locking fixing part. Therefore, even if it is found by the confirmation part that the seal or the seal retainer has been forgotten to be assembled, the cover can be removed from the housing and the seal or the seal retainer can be easily attached in the mounting direction.

[0020] As another aspect of the present invention, the electric wire may be provided with a shielding layer surrounding a conductor, and a shielding shell surrounding the terminal may be provided inside the housing, and the shielding layer and the shielding shell may be electrically conductive.

[0021] According to the present invention, an inner shield type connector can be configured. In particular, in the case of an inner shield type connector, unlike an outer shield type connector in which the shield shell surrounds the outside, it is not possible to seal between the shield shell and the housing. Therefore, it is necessary to separately provide the seal that is attached to the inside of the housing in the mounting direction and seals, and the seal retainer that prevents the seal from slipping out. However, since the seal and the seal retainer attached to the housing can be confirmed from the outside, it is possible to prevent forgetting to assemble the seal and the seal retainer, and the inner shield type connector can be reliably assembled. Effect of the Invention

[0022] According to the present invention, it is possible to provide a connector that can prevent forgetting to assemble the seal or seal retainer. [Brief description of the drawings]

[0023] [Figure 1] FIG. [Diagram 2] FIG. 4 is a schematic perspective view of a connector connection structure in a separated state. [Diagram 3] FIG. 4 is a schematic perspective view of a connector connection structure in a separated state. [Figure 4] FIG. 4 is a schematic exploded perspective view of a harness-side connector. [Diagram 5] FIG. 4 is a schematic exploded perspective view of a harness-side connector. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] An explanatory diagram of a wire seal. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] 4 is a schematic bottom view of the harness-side connector in an assembled state. FIG. [Figure 13] FIG. 4 is an explanatory diagram of the harness side connector in an assembled state. [Figure 14] FIG. 11 is a schematic bottom view of a harness-side connector according to another embodiment. [Figure 15] 15 is a cross-sectional view taken along the line HH in FIG. 14 . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] An embodiment of the present invention will be described below with reference to FIGS. Fig. 1 shows a schematic perspective view of the connector connection structure A, Fig. 2 shows a schematic perspective view of the connector connection structure A in a separated state viewed from the lower side Hd, and Fig. 3 shows a schematic perspective view of the connector connection structure A in a separated state viewed from the upper side Hu. Fig. 4 shows a schematic exploded perspective view of the harness side connector 1 viewed from the lower side Hd, and Fig. 5 shows a schematic exploded perspective view of the harness side connector 1 viewed from the upper side Hu. In Figs. 4 and 5, a part of the shield layer 34 is exposed in order to clarify the structure of the wire harness 3.

[0025] Fig. 6(a) shows a schematic front view of the female housing 10 as viewed from the back side Db, and Fig. 6(b) shows a schematic side view of the female housing 10 as viewed from the right side Wr. Fig. 7(a) shows a schematic bottom view of the female housing 10 as viewed from the lower side Hd, Fig. 7(b) shows a schematic enlarged view of part b in Fig. 4, and Fig. 8 shows a schematic enlarged front view of the holder main body 12.

[0026] Fig. 9(a) shows a schematic bottom view of the wire seal 7 as viewed from the lower side Hd, and Fig. 9(b) shows a cross-sectional view along the line AA in Fig. 9(a). Fig. 10(a) shows a schematic bottom view of the seal retainer 8 as viewed from the lower side Hd, Fig. 10(b) shows a cross-sectional view along the line BB in Fig. 10(a), and Fig. 10(c) shows a cross-sectional view along the line CC in Fig. 10(a). Fig. 11(a) shows a schematic bottom view of the cover 9 as viewed from the lower side Hd, Fig. 11(b) shows a cross-sectional view along the line DD in Fig. 11(a), and Fig. 11(c) shows a cross-sectional view along the line EE in Fig. 11(a).

[0027] Figure 12 shows a schematic bottom view of the harness side connector 1 in an assembled state as viewed from the lower side Hd, Figure 13(a) shows a schematic enlarged cross-sectional view corresponding to the FF arrow view in Figure 12, and Figure 13(b) shows a schematic enlarged cross-sectional view corresponding to the GG arrow view in Figure 12.

[0028] Here, the direction in which the harness side connector 1 and the device side connector 200 are attached and detached in Fig. 1 is defined as the depth direction D. The direction in which the harness side connector 1 is attached to the device side connector 200 is defined as the depth side Db, and the direction in which the harness side connector 1 is detached from the device side connector 200 is defined as the front side Df. The directions perpendicular to the depth direction D are set as the width direction W and the height direction H. The left side along the width direction W is defined as the left side Wl, and the right side is defined as the right side Wr. The upper side in Fig. 1 is defined as the upper side Hu, and the lower side is defined as the lower side Hd. The same applies to Figs. 2 to 13 below. However, this direction does not define the direction regarding the configurations of the harness side connector 1, the device side connector 200, and the connector connection structure A.

[0029] As shown in Figures 1 to 3, the connector connection structure A is a connection structure that electrically connects, for example, by fitting a harness side connector 1 attached to a wire harness 3 in which insulated electric wires are bundled, to an equipment side connector 200 provided on an equipment such as a motor equipped in an automobile or the like.

[0030] First, a brief description will be given of the device-side connector 200 that constitutes the connector connection structure A when connected to the harness-side connector 1 described later. As shown in FIGS. 2 and 3, the device-side connector 200 includes two device-side terminals 201 and a male housing 210 that receives the device-side terminals 201.

[0031] The device-side terminal 201 is a rectangular metal flat plate that is elongated in the depth direction D, and is electrically connected to an electrical component body (not shown) arranged inside the housing 100. Two device-side terminals 201 are provided such that their main surfaces along the depth direction D and height direction H face each other at a predetermined interval in the width direction W.

[0032] The male housing 210 is for holding the device side terminal 201 therein, and includes a fixed base 211 that is fixed to the casing 100 described below, and a hood portion 212 that stands upright from the fixed base 211.

[0033] The fixed base 211 is a plate-like body that is generally rectangular in front view when viewed from the insertion direction (front side Df) in which the harness-side connector 1 is inserted into the device-side connector 200. The hood portion 212 is an annular wall extending from the fixed base portion 211 toward the front side Df so as to surround the central portion of the fixed base portion 211.

[0034] The device side connector 200, which is configured by holding the device side terminal 201 inside the hood portion 212 of the above-mentioned male housing 210, is assembled to the housing 100 of an equipment such as a motor equipped in an automobile or the like, as shown in Figures 2 and 3.

[0035] Next, a description will be given of the harness-side connector 1 which constitutes the connector connection structure A by being connected to the device-side connector 200 mounted on the housing 100 of a device such as a motor mounted on an automobile or the like, as described above.

[0036] As shown in Figures 4 and 5, the harness side connector 1 is composed of a box-shaped female housing 10, a shield shell 2 accommodated inside the female housing 10, a wire harness 3 inserted into the female housing 10, and a locking lever 4, a housing seal 5, a housing seal cover 6, a wire seal 7, a seal retainer 8 and a cover 9 attached to the female housing 10.

[0037] As shown in Figures 4 to 6, the female housing 10 has a box-like shape with openings on the lower side Hd and the rear side Db, and is integrally formed of a cylindrical harness holding portion 11 and a holding portion main body 12 provided on the upper side Hu of the harness holding portion 11.

[0038] The harness holding portion 11 is a cylindrical body having a rectangular shape when viewed from the bottom, with the width direction W being slightly longer than the depth direction D, and as shown in Figure 7(a), has two insertion holes 111 that penetrate in the height direction H, a locking recess 112 and a locking protrusion 115 provided at the lower end of the harness holding portion 11, a locking connection portion 113 provided on the outer surface of the front side Df, and a locking shaft portion 114 provided on both side surfaces in the width direction W.

[0039] The insertion hole 111 is a rectangular hole when viewed from the bottom, which is longer in the depth direction D than in the width direction W, and two insertion holes 111 are arranged in parallel in the width direction W. The two insertion holes 111 arranged in parallel in the width direction W are separated by a partition wall 116.

[0040] As shown in Figures 7(a) and (b), the locking recess 112 is a recess at the lower end of the harness holding portion 11, in which a portion of the inner surface facing the insertion hole 111 is recessed toward the upper side Hu, and is formed in a size that allows the locking extension portion 81 of the seal retainer 8, which will be described later, to be positioned therein.

[0041] The locking recesses 112 are provided at the center of each side of each of the insertion holes 111, which are rectangular in bottom view and slightly longer in the width direction W than in the depth direction D, at the lower end of the harness holding portion 11, which is rectangular in bottom view and slightly longer in the width direction W than in the depth direction D. Therefore, the locking recesses 112 are provided at seven locations in total, at the center of each of the depth directions D, two locations at a predetermined interval in each of the width directions W, and the center of the partition walls 116 extending in the depth direction D, at the lower end of the harness holding portion 11, which is rectangular in bottom view and slightly longer in the width direction W than in the depth direction D.

[0042] As shown in the enlarged view of part a in Figure 4, the locking connection part 113 has a generally box-like shape with an opening on the lower side Hd, and is configured to be lockable by inserting the locking lever 4 described later from the lower side Hd.

[0043] The locking connection part 113 is formed by a pair of protruding pieces protruding from the harness holding part 11 and a connector that connects the tips of the protruding pieces in the width direction W. The locking connection part 113 is provided in the center part in the width direction W of the outer surface of the front side Df of the harness holding part 11.

[0044] The locking shaft 114 is a support part that rotatably supports the locking lever 4 described later, and is a substantially cylindrical body that protrudes outward in the width direction W from both side surfaces of the harness holding part 11 in the width direction W. In detail, the locking shaft 114 is composed of a cylinder that protrudes in the width direction W from the side surfaces of the harness holding part 11 in the width direction W, and protruding parts that protrude in a rectangular shape from both ends of the cylinder in the depth direction D toward both ends in the depth direction D (see FIG. 6(b)).

[0045] The locking shaft portions 114 configured in this manner are provided at two locations in total on each side surface of the harness holding portion 11 in the width direction W, at positions above the locking connection portion 113 and facing each other in the width direction W.

[0046] The locking protrusion 115 is a fixing part that locks with the cover 9 described later to fix the cover 9, and is formed so as to protrude in the depth direction D from the side surfaces of the front side Df and the rear side Db of the harness holding part 11, as shown in the enlarged view of part a in Figure 4 and Figure 7(a).

[0047] Specifically, the locking projection 115 has an upper side Hu surface extending substantially horizontally, and a lower side Hd surface inclined outward in the depth direction D as it approaches the upper side Hu. The locking projections 115 thus configured are provided in a total of four positions, two at a time, at a predetermined interval in the width direction W near the lower end of the surface of the harness holding part 11 along the width direction W.

[0048] The harness holding portion 11 and the holding portion main body 12 arranged on the upper side Hu of the harness holding portion 11 form a female housing 10. The holding portion main body 12 has a box-like shape with openings on the lower side Hd and the rear side Db, and is composed of a housing bottom portion 121 arranged on the front side Df along the height direction H, and a housing side wall portion 122 standing upright from the housing bottom portion 121.

[0049] The holding portion main body 12 is formed so that its length in the depth direction D is longer than the length of the harness holding portion 11 in the depth direction D, and its end face on the front side Df is flush with the harness holding portion 11 in a side view. Therefore, the holding portion main body 12 protrudes from the end of the upper side Hu of the harness holding portion 11 to the back side Db (see FIG. 6(b)).

[0050] The housing bottom surface portion 121 has a thickness substantially equal to that of the plate-like body constituting the harness holding portion 11, and is formed in a substantially square shape when viewed from the back side Db. The housing bottom surface portion 121 is disposed on the front side Df of the holding portion main body 12, and has a pair of extension walls 123 extending from the partition wall 116 of the harness holding portion 11 to the upper side Hu, and a restricting protrusion 124 facing the extension walls 123 in the width direction W, as shown in FIG.

[0051] The extension wall 123 provided on the housing bottom surface 121 stands at a predetermined height from the housing bottom surface 121, and has a first locking rib 125 that protrudes outward and a cylindrical protrusion 126 that protrudes to the rear side Db. The extension wall 123 stands at a height of approximately one-quarter of the length of the holder main body 12 in the depth direction D.

[0052] The first locking rib 125 is inclined so as to move away from the extension wall portion 123 as it goes toward the upper side Hu, and has a surface at its tip along the width direction W (see FIG. 6(a)). The protrusion 126 has a cylindrical rectangular parallelepiped shape when viewed from the front, provided on the upper side Hu of the first locking rib 125, and protrudes from the housing bottom portion 121 toward the opening on the rear side Db of the holder main body 12 at a predetermined height.

[0053] The restricting protrusion 124 provided on the housing bottom surface portion 121 is formed in a generally triangular cross section and has a surface along the width direction W and a surface that slopes outward in the width direction W as it approaches the lower side Hd. The restricting protrusion 124 is provided on the housing bottom surface portion 121 at a position opposite to the first locking rib 125 in the width direction W.

[0054] The housing side wall portion 122, which constitutes the holding portion main body 12 together with the housing bottom portion 121, is erected from the outer edge of the housing bottom portion 121 toward the rear side Db, and has a double-wall structure consisting of an outer wall 122a and an inner wall 122b arranged inside the outer wall 122a, as shown in Figure 8.

[0055] The outer wall 122a is a wall having a predetermined thickness, and has a rib 127 protruding along the width direction W, and an insertion window 128 formed by cutting out a portion of the outer wall 122a. Since the holding portion main body 12 has an opening on the lower side Hd as described above, the outer wall 122a arranged on the lower side Hd is provided only at a portion where the holding portion main body 12 protrudes from the harness holding portion 11.

[0056] The rib 127 protrudes a predetermined length from the inner surface of the outer wall 122a toward the inner wall 122b, and is formed over the entire length in the depth direction D of the holding portion main body 12. The ribs 127 thus configured are provided in a total of four positions, two positions each at a predetermined interval in the height direction H, in positions opposing each other in the width direction W, near the upper end of the surface along the height direction H of the outer wall 122a.

[0057] The insertion window 128 is formed by cutting out the outer wall 122a in the depth direction D. More specifically, the insertion window 128 is formed by cutting out the outer wall 122a on the lower side Hd of the rib 127 by a length substantially equal to the length of the harness holding portion 11 in the depth direction D. The insertion window 128 thus configured is provided in a total of two places in the outer wall 122a at positions facing each other in the width direction W. As shown in FIG. 8, by providing the insertion window 128, an insertion space 128a having a generally rectangular shape in front view is formed between the outer wall 122a and the inner wall 122b on the lower side Hd of the rib 127.

[0058] The inner wall 122b is a wall that forms a rectangular shape that is slightly smaller than the rectangular shape formed by the outer wall 122a. Similarly to the outer wall 122a, the inner wall 122b arranged on the lower side Hd is provided only at a portion where the holding portion main body 12 protrudes from the harness holding portion 11.

[0059] Between the outer wall 122a and the inner wall 122b thus configured, a space having a substantially rectangular ring shape in a front view is formed. Thus, the holder body 12 composed of the housing bottom surface portion 121 and the housing side wall portion 122 (122a, 122b) has an opening on the front side Df and a lower side Hd of the internal space communicating with the insertion hole 111.

[0060] The shield shell 2 housed inside the harness side connector 1 has a box-like shape tapered at the tip, and is integrally formed with a cylindrical harness insertion portion 21 and a box-shaped terminal holding portion 22 provided on the upper side Hu of the harness insertion portion 21. The shield shell 2 is made of a conductive material.

[0061] The shield shell 2 configured in this manner accommodates therein a harness-side terminal 30 of the wire harness 3 described later, and is conductively connected to the shield layer 34 of the shielded electric wire 31 to provide a shielding function.

[0062] As shown in FIGS. 4 and 5, the wire harness 3 includes a harness-side terminal 30 and a shielded wire 31 connected to the harness-side terminal 30. As shown in FIG. The shielded electric wire 31 has, arranged in this order from the center toward the outer diameter, a conductive core wire 32, an insulating inner coating layer 33, a shield layer 34 made of braided metal wires such as copper wires, and an insulating outer coating layer 35.

[0063] At the end of the upper side Hu, the outer coating layer 35 of the shielded wire 31 is peeled off to expose the shielding layer 34, which is electrically connected to the shield shell 2 as described above. The shielding layer 34 is not limited to being made of braided metal wires, and may be a metal foil or the like. As shown in FIGS. 4 and 5, the harness terminal 30 includes a wire connecting portion 301 connected to an end of the upper side Hu of the shield wire 31, and a terminal connecting portion 302.

[0064] The terminal connection portion 302 has a pair of side walls opposed to each other in the width direction W, and when connected to the device-side connector 200, the device-side terminal 201 is inserted between them for connection. The wire harness 3 thus configured is made up of two wires arranged in parallel along the width direction W (see Figs. 4 and 5).

[0065] A locking lever 4 for fixing the connection state to the device-side connector 200 is attached to the female housing 10 so as to be pivotally supported on a locking shaft portion 114 . The locking lever 4 has a generally gate-like shape in plan view, is generally U-shaped in plan view, and is generally L-shaped in side view.

[0066] The female housing 10 is provided with a housing seal 5 that seals the gap between the connection portions when connected to the device-side connector 200, and a housing seal cover 6 that prevents the housing seal 5 from falling off.

[0067] The wire seal 7 is a member that seals between the shielded electric wire 31 inserted into the insertion hole 111 and the harness holding portion 11 by being assembled to the female housing 10 through which the wire harness 3 is inserted. As shown in FIG. 9(a), the wire seal 7 is a plate-shaped rubber member having substantially the same shape as the outer edge that defines the insertion hole 111 in a plan view, and has a circular seal hole 71.

[0068] The seal hole 71 is provided closer to the front side Df than the center portion in the depth direction D in a plan view of the wire seal 7. The inner diameter of the seal hole 71 is approximately equal to the outer diameter of the shielded electric wire 31. In this embodiment, since the wire harness 3 is configured with two wires, two wire seals 7 are provided in accordance with the number of wire harnesses 3. The two wire seals 7 are arranged in parallel along the width direction W when attached to the harness holding portion 11 of the female housing 10 (see Figs. 4 and 5).

[0069] The seal retainer 8 is a component that is laminated to the wire seal 7 assembled to the female housing 10 to prevent the wire seal 7 from falling out of the insertion hole 111 and to hold the inserted wire harness 3.

[0070] 10(a), the seal retainer 8 is a plate-like body having substantially the same shape as the wire seal 7 in a plan view. The seal retainer 8 includes a locking extension 81 that protrudes outward, a circular first seal confirmation hole 82 that penetrates in the plate thickness direction (height direction H), and an electric wire insertion hole 83 through which the shielded electric wire 31 of the wire harness 3 is inserted.

[0071] The locking extension portion 81 is a rectangular piece formed by extending a predetermined length from a part of the outer edge of the seal retainer 8. Specifically, the locking extension portion 81 is formed to be slightly smaller than the size of the locking recess 112 in a plan view. The locking extension portion 81 is provided at a total of four positions facing the locking recess 112 in the height direction H when assembled to the female housing 10.

[0072] As shown in Figures 10(a) and 10(b), the first seal confirmation hole 82 is a circular penetrating hole located near the corner of the rear side Db and right side Wr of the seal retainer 8, i.e., spaced apart from the outer edge of the seal retainer 8 and the wire insertion hole 83. The wire insertion hole 83 is a hole having a larger diameter than the first seal confirmation hole 82 in a plan view of the seal retainer 8. Specifically, the inner diameter of the wire insertion hole 83 is formed to be slightly larger than the outer diameter of the shielded electric wire 31. The wire insertion hole 83 is provided closer to the front side Df than the center part in the depth direction D in a plan view, that is, at a position facing the seal hole 71 in the height direction H in a state where it is assembled to the female housing 10. A plurality of elastic pieces 831 protrude from the inner edge of the wire insertion hole 83.

[0073] 10(c), the elastic piece 831 is integrally formed of a plate body 831a protruding toward the upper side Hu and a block body 831b provided at the tip of the plate body 831a. The seal retainer 8 including the elastic piece 831 is made of a material having flexibility and elasticity.

[0074] The elastic pieces 831 thus configured are provided at ten locations at equal intervals around the entire circumference of the inner edge that defines the electric wire insertion hole 83. The diameter of an imaginary circle (referred to as a first imaginary circle C1) defined by the outer edge of the inner side of the block body 831b is formed to be slightly smaller than the outer diameter of the shielded electric wire 31 (see FIG. 10(a)).

[0075] In this embodiment, since the wire harness 3 is configured with two wires, two seal retainers 8 are provided in accordance with the number of wire harnesses 3. The two seal retainers 8 are arranged in parallel along the width direction W when attached to the harness holding portion 11 of the female housing 10 (see Figs. 4 and 5).

[0076] The cover 9 is a member that covers the insertion hole 111 together with the wire seal 7 and the seal retainer 8 by being attached to the female housing 10. As shown in FIGS. 11(a) and 11(b), the cover 9 is integrally formed with a cover bottom portion 91 along the depth direction D and a cover side wall portion 92 erected from the cover bottom portion 91.

[0077] In a plan view, the cover bottom portion 91 is a generally rectangular plate-like body larger than the insertion hole 111, and has a cover protrusion portion 93 having a cylindrical protrusion portion 93, as well as a retainer confirmation hole 94 and a second seal confirmation hole 95 which are circular through holes.

[0078] As shown in Figures 11(a) and 11(b), the cover protrusion 93 is provided on the front side Df of the center portion of the cover 9 in the depth direction D, and has a circular cover hole 931 that penetrates in the height direction H. The inner diameter of the cover hole 931 is formed to be slightly smaller than the inner diameter of an imaginary circle (referred to as a second imaginary circle C2) formed by the outer edge of the block body 831b (see FIG. 11(a)).

[0079] 11(a), the retainer confirmation hole 94 is provided near a corner on the rear side Db and left side Wl of the cover 9. The inner diameter of the retainer confirmation hole 94 is approximately equal to the inner diameter of the first seal confirmation hole 82 of the seal retainer 8.

[0080] The second seal confirmation hole 95 is provided at a predetermined distance in the width direction W from the retainer confirmation hole 94. Specifically, the second seal confirmation hole 95 is provided at a position facing the first seal confirmation hole 82 of the seal retainer 8 in the height direction H when assembled into the female housing 10. The inner diameter of the second seal confirmation hole 95 is approximately equal to the inner diameter of the retainer confirmation hole 94.

[0081] In other words, the retainer confirmation hole 94 and the second seal confirmation hole 95 are arranged so that their positions in the depth direction D correspond to those of the first seal confirmation hole 82 of the seal retainer 8. Furthermore, the retainer confirmation hole 94 and the second seal confirmation hole 95 are arranged at intervals from each other, and are also arranged at intervals from the outer edge of the cover bottom portion 91 and the cover hole 931.

[0082] The cover side wall portion 92 is erected from three outer edges, all but one of the two outer edges along the depth direction D, of the cover bottom portion 91, which is approximately rectangular when viewed from above, and has a cover engagement hole 921 that penetrates part of it. 11(b) and 11(c), the cover locking hole 921 is a hole that is generally rectangular in front view and is formed by penetrating from an end of the lower side Hd of the cover side wall portion 92 to a predetermined height in the height direction H. The cover locking hole 921 thus configured is provided in a total of two places at positions corresponding to the locking projections 115 when assembled to the female housing 10.

[0083] In this embodiment, since the wire harness 3 is configured with two wires, two covers 9 are provided in accordance with the number of wire harnesses 3. The two covers 9 are arranged in parallel along the width direction W when attached to the harness holding portion 11 of the female housing 10 (see Figs. 4 and 5).

[0084] Of the covers 9 arranged in parallel, in the cover 9 arranged on the right side Wr, the cover side wall portion 92 stands upright from other than the outer edge of the left side Wl of the cover bottom portion 91. In the cover 9 arranged on the left side Wl, the cover side wall portion 92 stands upright from other than the outer edge of the right side Wr of the cover bottom portion 91.

[0085] The above-mentioned harness side connector 1, in which each element is configured as described above, accommodates the shield shell 2 and wire harness 3 inside the female housing 10, has a housing seal 5 and a housing seal cover 6 attached to the holding portion main body 12, has a wire seal 7, a seal retainer 8 and a cover 9 attached in this order from the upper side Hu to the lower side Hd in the insertion hole 111 through which the wire harness 3 is inserted, and has a shielded wire 31 led out from the cover hole 931 of the cover 9 (see Figure 12).

[0086] The inner diameter of the cover hole 931 is formed slightly smaller than the second imaginary circle C2 of the seal retainer 8 laminated on the upper side Hu of the cover 9. Therefore, when the cover 9 is assembled to the female housing 10, the inner peripheral surface of the cover hole 931 presses the elastic piece 831 inward (toward the center of the shielded electric wire 31) (see FIG. 13(a)). This allows the elastic piece 831 and the inner peripheral surface of the cover hole 931 to hold the shielded electric wire 31 in the height direction H.

[0087] Therefore, the seal retainer 8 does not move inadvertently relative to the shielded electric wire 31, and the wire seal 7 can be prevented from falling off from the insertion hole 111. Also, the relative movement of the led-out shielded electric wire 31 relative to the female housing 10 can be suppressed. This makes it possible to stabilize the connection state with the device-side connector 200 connected to the harness-side connector 1, for example.

[0088] Furthermore, the cover 9 is provided with a retainer confirmation hole 94 and a second seal confirmation hole 95, each of which is a circular through hole, and the seal retainer 8 is provided with a first seal confirmation hole . Therefore, by visually checking the retainer confirmation hole 94 of the cover 9 from the lower side Hd, it is possible to check the inside (upper side Hu) through the retainer confirmation hole 94 (see FIG. 13(a)).

[0089] In this embodiment, since the seal retainer 8 is attached to the upper side Hu of the cover 9, the seal retainer 8 can be confirmed through the retainer confirmation hole 94. In this way, since the interior can be confirmed through the retainer confirmation hole 94, it is possible to prevent, for example, the cover 9 from being erroneously attached in a state in which the seal retainer 8 is not attached.

[0090] In addition, since the second seal confirmation hole 95 provided in the cover 9 is connected to the first seal confirmation hole 82 of the seal retainer 8 in the height direction H, when the second seal confirmation hole 95 is checked from the lower side Hd, the inside (upper side Hu) of the seal retainer 8 can be checked through the first seal confirmation hole 82 (see Figure 13(b)).

[0091] In this embodiment, since the wire seal 7 is assembled to the upper side Hu of the seal retainer 8, the wire seal 7 can be confirmed through the first seal confirmation hole 82 and the second seal confirmation hole 95. In this manner, since the inside of the seal retainer 8 can be confirmed through the first seal confirmation hole 82 and the second seal confirmation hole 95, it is possible to prevent, for example, the cover 9 from being erroneously assembled in a state in which the wire seal 7 is not assembled.

[0092] As described above, the first seal confirmation hole 82 is a hole penetrating the seal retainer 8, and the retainer confirmation hole 94 and the second seal confirmation hole 95 are holes penetrating the cover bottom surface portion 91. However, the first seal confirmation hole 82 is disposed at a distance from the outer edge of the seal retainer 8 and the electric wire insertion hole 83, and the retainer confirmation hole 94 and the second seal confirmation hole 95 are disposed at a distance from each other, that is, from the outer edge of the cover bottom surface portion 91 and the cover hole 931. Therefore, it is possible to suppress a decrease in the strength of the seal retainer 8 and the cover 9 and a decrease in the watertightness of the wire seal 7 due to the first seal confirmation hole 82, the retainer confirmation hole 94, and the second seal confirmation hole 95, which are through holes.

[0093] A connection method of the connector connection structure A will be briefly described below. First, the harness side connector 1 is placed on the front side Df of the device side connector 200 fixed to the housing 100 so that the holding portion main body 12 faces the depth direction D, and the harness side connector 1 is moved to the rear side Db. As a result, the hood portion 212 is inserted into the space formed between the outer wall 122a and the inner wall 122b, and the connector connection structure A can be configured. At this time, the locking lever 4 is pivoted to maintain the connection state between the device side connector 200 and the harness side connector 1 in the connector connection structure A.

[0094] In this manner, when the device-side connector 200 and the harness-side connector 1 are connected, the harness-side terminal 30 is in contact with the device-side terminal 201. This allows electrical connection to the electrical equipment body arranged inside the housing 100, and allows electrical continuity between the device-side terminal 201 and the harness-side terminal 30 electrically connected to the shielded electric wire 31.

[0095] The harness side connector 1 thus configured is fitted with the device side connector 200 to connect the terminals (the harness side terminal 30 and the device side terminal 201) provided on each of them. The harness side connector 1 is provided with a wire harness 3 having the harness side terminal 30 attached to its tip, and a female housing 10 in which the harness side terminal 30 and the shield shell 2 are disposed.

[0096] The female housing 10 is provided with a holding portion main body 12 in which the harness side terminals 30 and the shield shell 2 are arranged, a harness holding portion 11 that is connected to the holding portion main body 12 and holds the wire harness 3, and has an insertion hole 111 through which the wire harness 3 is inserted.

[0097] Furthermore, there are provided a wire seal 7 that is attached to the harness holding portion 11 to seal between the wire harness 3 and the harness holding portion 11, a seal retainer 8 that is attached to the harness holding portion 11 to prevent the wire seal 7 from being pulled out from the harness holding portion 11, and a cover 9 that is attached to the harness holding portion 11 to cover the seal retainer 8.

[0098] The cover 9 is provided with a retainer confirmation hole 94 and a second seal confirmation hole 95 through which the seal retainer 8 and the wire seal 7 attached to the harness holding portion 11 can be confirmed from the outside (the lower side Hd) in the attachment direction to the harness holding portion 11. Furthermore, the seal retainer 8 is provided with a first seal confirmation hole 82 through which the wire seal 7 can be confirmed, and the second seal confirmation hole 95 is configured so that the wire seal 7 can be confirmed through the first seal confirmation hole 82.

[0099] This makes it possible to prevent forgetting to assemble the wire seal 7 and the seal retainer 8 to the female housing 10. In more detail, a female housing 10 is formed together with a holding portion main body 12 in which the harness side terminals 30 and the shield shell 2 are arranged, and the harness holding portion 11 which holds the wire harness 3 has an insertion hole 111 through which the wire harness 3 is inserted.

[0100] A wire seal 7 that seals the gap between the wire harness 3 and the harness holding portion 11, a seal retainer 8 that prevents the wire seal 7 from coming out of the harness holding portion 11, and a cover 9 that covers the seal retainer 8 are attached.

[0101] Furthermore, the cover 9 is provided with a retainer confirmation hole 94 and a second seal confirmation hole 95 through which the seal retainer 8 and the wire seal 7 attached to the harness holding portion 11 can be confirmed from the outside (the lower side Hd) in the attachment direction to the harness holding portion 11, and the seal retainer 8 is provided with a first seal confirmation hole 82 through which the wire seal 7 can be confirmed. The second seal confirmation hole 95 is configured so that the wire seal 7 can be confirmed via the first seal confirmation hole 82. Therefore, when assembly is completed, the wire seal 7 and the seal retainer 8 arranged inside can be confirmed from the outside of the female housing 10 through the retainer confirmation hole 94 and the second seal confirmation hole 95.

[0102] In other words, if at least one of the wire seal 7 and the seal retainer 8 cannot be confirmed through the retainer confirmation hole 94 and the second seal confirmation hole 95, then at least one of the wire seal 7 and the seal retainer 8 has not been assembled to the female housing 10. This makes it possible to prevent forgetting to assemble the wire seal 7 and the seal retainer 8 to the female housing 10. This makes it possible to prevent malfunctions such as short circuits caused by inadvertent water penetration into the harness side connector 1 in which the wire seal 7 and the seal retainer 8 have been forgotten to be assembled.

[0103] Moreover, since the first seal confirmation hole 82 penetrates the seal retainer 8 in the mounting direction (height direction H), the wire seal 7 can be confirmed through the first seal confirmation hole 82 which has a simple structure. In addition, the retainer confirmation hole 94 and the second seal confirmation hole 95 are formed in a window shape that can be seen from the outside (the lower side Hd) in the mounting direction. As a result, compared to when the retainer confirmation hole 94 and the second seal confirmation hole 95 are formed by a notch or the like, since they are formed in a window shape, a decrease in the strength of the cover 9 can be suppressed.

[0104] In addition, since the retainer confirmation hole 94 and the second seal confirmation hole 95 penetrate the cover 9 in the installation direction (height direction H), the wire seal 7 and the seal retainer 8 can be confirmed using the retainer confirmation hole 94 and the second seal confirmation hole 95, which have a simple structure.

[0105] In addition, the retainer confirmation hole 94 and the second seal confirmation hole 95, which penetrate in the installation direction (height direction H), can ensure stable waterproofing without reducing the watertightness provided by the wire seal 7, as with, for example, confirmation holes that penetrate in the contact direction (width direction W) between the wire seal 7 attached to the harness holding portion 11 and the harness holding portion 11.

[0106] In addition, a first seal confirmation hole 82 is provided in the seal retainer 8, and a retainer confirmation hole 94 for confirming the seal retainer 8 and a second seal confirmation hole 95 for confirming the wire seal 7 through the first seal confirmation hole 82 are provided in the cover 9. As a result, the wire seal 7 can be confirmed from outside via the first seal confirmation hole 82 through the second seal confirmation hole 95 provided in the cover 9, and the seal retainer 8 can be confirmed from outside through the retainer confirmation hole 94. Therefore, since the wire seal 7 and the seal retainer 8 can be confirmed individually through the retainer confirmation hole 94 and the first seal confirmation hole 82, it can be reliably confirmed that the wire seal 7 and the seal retainer 8 are attached inside the harness holding portion 11.

[0107] In addition, since two wire harnesses 3 are provided and two wire seals 7, seal retainers 8 and covers 9 are provided in accordance with the number of wire harnesses 3, the female housing 10 can be easily assembled.

[0108] More specifically, the wire seals 7, seal retainers 8, and covers 9, which are provided in number according to the number of wire harnesses 3, can be inserted one by one and installed in the installation direction (height direction H). Therefore, compared to the case where a plurality of wire harnesses 3 are inserted into one wire seal 7, seal retainer 8, and cover 9, respectively, for assembly, the operability of the wire seals 7, seal retainers 8, and covers 9 is improved, and the ease of assembly of the harness-side connector 1 can be improved.

[0109] Also, there is provided a locking protrusion 115 that locks and fixes the cover 9 to the female housing 10. This allows the cover 9 to be easily attached and fixed to the female housing 10. Moreover, by releasing the lock of the locking protrusion 115, the cover 9 attached to the female housing 10 can be removed.

[0110] Therefore, even if checking through the retainer confirmation hole 94 and the second seal confirmation hole 95 reveals that the wire seal 7 or the seal retainer 8 has been forgotten to be installed, the cover 9 can be removed from the female housing 10 and the wire seal 7 or the seal retainer 8 can be easily installed in the installation direction (height direction H).

[0111] In addition, the wire harness 3 is provided with a shielding layer 34 surrounding the core wire 32, and inside the female housing 10, a shielding shell 2 surrounding the harness side terminal 30 and the shielding shell 2 is provided, and the shielding layer 34 and the shielding shell 2 are electrically conductive.

[0112] This makes it possible to configure an inner shield type harness side connector 1. In particular, in the case of an inner shield type harness side connector 1, sealing cannot be achieved between the shield shell 2 and the female housing 10 as in an outer shield type connector in which the shield shell surrounds the outside. For this reason, it is necessary to separately provide a wire seal 7 that is attached to the inside of the female housing 10 in the attachment direction (height direction H) and a seal retainer 8 that prevents the wire seal 7 from slipping out. However, because the wire seal 7 and seal retainer 8 attached to the female housing 10 can be confirmed from the outside (the lower side Hd), it is possible to prevent forgetting to assemble the wire seal 7 and seal retainer 8.

[0113] In the configuration of the present invention and the correspondence with the above-mentioned embodiment, The mating connector of the present invention corresponds to the device-side connector 200 of the embodiment, and the same applies below. The terminals correspond to the harness side terminal 30 and the device side terminal 201. The connector corresponds to harness side connector 1, The wires correspond to wire harness 3, The housing is compatible with the female housing 10, The terminal accommodating portion corresponds to the holding portion main body 12, The wire holding portion corresponds to the harness holding portion 11, The electric wire insertion hole corresponds to the insertion hole 111, The seal is compatible with wire seal 7. The seal retainer corresponds to the seal retainer 8, The cover corresponds to cover 9, The mounting direction corresponds to the back side Db, The confirmation portion, the viewing window, and the through hole correspond to the first seal confirmation hole 82, the retainer confirmation hole 94, and the second seal confirmation hole 95, The seal confirmation portion and the retainer side seal confirmation portion correspond to the first seal confirmation hole 82, The cover side retainer confirmation portion corresponds to the retainer confirmation hole 94, The cover side seal confirmation portion corresponds to the second seal confirmation hole 95, The locking and fixing portion corresponds to the locking projection 115, The conductor corresponds to the core wire 32, The shielding layer corresponds to the shielding layer 34, Shield Shell corresponds to Shield Shell 2, but The present invention is not limited to the configurations of the above-described embodiments, and many other embodiments can be obtained.

[0114] For example, in the above description, the retainer confirmation hole 94, the second seal confirmation hole 95, and the first seal confirmation hole 82 are formed as through holes, but are not limited to this. For example, they may be cut into parts of the wire seal 7, the seal retainer 8, and the cover 9, or the cover 9 and the seal retainer 8 may be partially or entirely made of a highly visible material. Furthermore, the retainer confirmation hole 94, the second seal confirmation hole 95, and the first seal confirmation hole 82 are formed as circles, but are not limited to this and may be, for example, polygonal.

[0115] In the above description, the retainer confirmation hole 94, the second seal confirmation hole 95, and the first seal confirmation hole 82 are confirmed by visual inspection, but they may be confirmed by various methods such as confirmation by image processing, confirmation of positions by laser light or a probe, etc. In that case, for example, the wire seal 7 and the seal retainer 8 may be configured in a color different from that of the cover 9, or the wire seal 7 and the seal retainer 8 may be configured in a material different from that of the cover 9. In addition, the second seal confirmation hole 95 is configured concentrically with the first seal confirmation hole 82, but is not limited to this as long as the wire seal 7 can be confirmed.

[0116] Furthermore, in the above description, two through holes (retainer confirmation hole 94 and second seal confirmation hole 95) are provided in cover 9, and installation of wire seal 7 and seal retainer 8 can be confirmed through these holes. However, as shown in Figures 14 and 15, one through hole 96 may be provided in cover 9 at a position corresponding to first seal confirmation hole 82 of seal retainer 8 in the assembled state. 14 is a schematic bottom view of the harness side connector 1 in another embodiment, and FIG. 15 is a cross-sectional view taken along the line HH in FIG.

[0117] Specifically, by forming the through hole 96 larger than the first seal confirmation hole 82 of the seal retainer 8, as shown in Figures 14 and 15, it is possible to confirm the attachment of both the wire seal 7 and the seal retainer 8 with one through hole 96. Furthermore, compared to the case where two through holes are provided in the cover 9, the workability of the cover 9 can be improved.

[0118] Although the through hole 96 is configured concentrically with the first seal confirmation hole 82, this is not limited to this as long as the wire seal 7 can be confirmed, and the through hole 96 can be formed in any suitable shape as long as the installation of both the wire seal 7 and the seal retainer 8 can be confirmed through the through hole 96.

[0119] In addition, in the above description, wire seals 7, seal retainers 8 and covers 9 corresponding to the number of wire harnesses 3 were used, but it is also possible to use wire seals 7 having seal holes 71 corresponding to the number of wire harnesses 3, seal retainers 8 having wire insertion holes 83 corresponding to the number of wire harnesses 3, or covers 9 having cover holes 931 corresponding to the number of wire harnesses 3. [Explanation of symbols]

[0120] 1…Harness side connector 2. Shield Shell 3. Wire harness 7…Wire seal 8…Seal retainer 9…Cover 10…Female housing 11…Harness holder 12...Holding part body 31...Shielded wire 32…Core wire 34…Shield layer 82…First seal confirmation hole 94…Retainer check hole 95…Second seal confirmation hole 111...Through hole 115...Latching protrusion 200...Device side connector 201…Device side terminal Db…Installation direction

Claims

1. A connector that mates with a mating connector to connect terminals provided on each connector, An electric wire with a terminal attached to the end; a housing in which the terminal is disposed, The housing includes: a terminal receiving portion in which the terminal is disposed; a wire holding portion that is in communication with the terminal accommodating portion and that holds the wire; a seal having an electric wire insertion hole through which the electric wire is inserted, the seal being attached to the electric wire holding portion to seal a gap between the electric wire and the electric wire holding portion; a seal retainer that is attached to the electric wire holding portion and that prevents the seal from being removed from the electric wire holding portion; a cover attached to the electric wire holding portion and covering the seal retainer; The cover is provided with a confirmation portion by which the seal retainer and the seal attached to the electric wire holding portion can be confirmed from the outside in a direction in which the seal retainer and the seal are attached to the electric wire holding portion, The seal retainer is provided with a seal confirmation portion that allows the seal to be confirmed, The confirmation unit is configured to be able to confirm the seal via the seal confirmation unit. connector.

2. The seal confirmation unit is A seal retainer is inserted through the seal retainer in the mounting direction. The connector of claim 1 .

3. The confirmation portion is a viewing window that can be viewed from the outside in the mounting direction. The connector of claim 1 .

4. The viewing window passes through the cover in the mounting direction. The connector according to claim 3.

5. The seal confirmation portion provided on the seal retainer is a retainer-side seal confirmation portion, The confirmation unit is a cover side retainer confirmation portion for confirming the seal retainer; a cover-side seal checking portion that checks the seal through the retainer-side seal checking portion; The connector of claim 1 .

6. The electric wire is provided in plurality, The seal, the seal retainer and the cover are provided in a plurality of numbers according to the number of electric wires. A connector according to any one of claims 1 to 5.

7. A locking and fixing portion is provided to lock and fix the cover to the housing. The connector according to claim 6.

8. The electric wire is provided with a shield layer surrounding a conductor, A shield shell is provided inside the housing to surround the terminals, The shield layer and the shield shell are electrically connected to each other. The connector according to claim 6.

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