Patent Description:
A door lock device for a vehicle is a device that engages and holds a striker of the vehicle when a door is closed, and releases the striker when the door is open. In the vehicle, a right door lock device is arranged in a right door, and a left door lock device is arranged in a left door. The right door lock device and the left door lock device are of right-and-left symmetrical configuration.

The door lock device inputs/outputs electrical signals via a coupler for an automatically locking function, a room lamp function or the like. The coupler is attached to a panel in the door, and a waterproof seal is arranged between the coupler and the panel. The waterproof seal is fixed to a flat portion in a housing of the door lock device to cover the outer peripheral wall of the coupler. In a waterproof seal described in <CIT>, a straight-line slit is formed in the center portion of a rectangular sealing material, and the slit is stretched and externally fitted to the coupler. In such a waterproof seal, when cutting out the part that constitutes the waterproof seal from a raw sealing material having a large area, it is possible to reduce waste materials thus achieving a high yield. The coupler described in <CIT> is formed in a rectangular sectional shape having four corners rounded.

Further examples of previously known door lock device pairs applied to a vehicle are derivable from <CIT>, <CIT>, as well as <CIT>, which forms the basis for the two-part form of independent claim <NUM>.

Here, the coupler is usually formed in a circular shape as viewed in a sectional view. When the waterproof seal described in <CIT> is applied to the coupler formed in a circular shape as viewed in a sectional view, it is necessary to stretch the slit for fitting the waterproof seal to the circular outer wall of the coupler, thus lowering workability. Furthermore, in order to stretch the slit without damaging the waterproof seal, the waterproof seal is required to have a strength or dimensions with a certain amount of allowance. On the other hand, when the waterproof seal is formed in a circularly shape, the waterproof seal is lower in yield.

The present invention has been made to overcome such drawbacks, and it is an object of the present invention to provide a door lock device pair having good workability when the waterproof seal is fixed to the housing, and having a high yield of the waterproof seal.

To resolve the above problems and attain the object, a door lock device pair according to the present invention applied to a vehicle according to independent claim <NUM> is provided. Distinct embodiments are derivable from the dependent claims. A door lock device pair according to the present invention applied to a vehicle includes: a right door lock device; and a left door lock device, each of the right door lock device and the left door lock device including: housings formed in a casing, a cover, and a waterproof cover; a coupler wall formed in a tubular shape and projecting from the cover; a flat portion formed in a periphery of the coupler wall and formed in an extending manner over an upper flat portion that is a part of the waterproof cover and a lower flat portion that is a part of the cover; and a waterproof seal fixed to the flat portion and being wrapped around and cover an outer peripheral wall of the coupler wall, the waterproof seal including: an inner peripheral surface; an outer peripheral surface, wherein the waterproof seal further includes an inclined surface that forms an acute angle with respect to the inner peripheral surface at one end of the inclined surface and forms an obtuse angle with respect to the outer peripheral surface at another end of the inclined surface, the inner peripheral surface being brought into contact with the outer peripheral wall of the coupler wall in an extending manner around the outer peripheral wall of the coupler wall and further brought into contact with the inclined surface, and the waterproof seals in the right door lock device and the left door lock device having respective shapes identical to each other, and the waterproof seals being wrapped around the respective outer peripheral walls of the coupler walls in the respective directions identical to each other. The lower flat portions in the right door lock device and the left door lock device may have respective shapes identical to each other as viewed in a side view and are of right-and-left asymmetrical configuration, and each of the flat portions is formed in a shape extending along a fixing surface of the waterproof seal.

The coupler wall may include a cylinder part having a constant height from the flat portion, and a projecting portion further projecting from the cylinder part and being formed in a range of <NUM> degrees or less with respect to an entire circumference of the coupler wall.

Each of the right door lock device and the left door lock device may include a plurality of the housings.

The acute angle formed at the one end of the waterproof seal may be in the range of <NUM> degrees to <NUM> degrees.

A corner part formed on an inner peripheral side of the another end of the waterproof seal may coincide with an obtuse angle part formed at the one end of the waterproof seal.

The door lock device pair according to the present invention includes a right door lock device and a left door lock device that are applied to a vehicle. The waterproof seals in the right door lock device and the left door lock device have shapes identical to each other, and are wrapped around the respective couple walls in the same direction. Consequently, the door lock device pair has good workability when the waterproof seal is fixed to the housing, and has a high yield of the waterproof seal.

Hereinafter, an embodiment of a door lock device pair according to the present invention is specifically explained based on drawings. Here, the present invention is not limited to the embodiment.

<FIG> is a perspective view illustrating a door lock device pair <NUM> according to the present embodiment. The door lock device pair <NUM> includes a right door lock device 10R applied to a right door of a vehicle, and a left door lock device <NUM> applied to a left door of the vehicle. The right door lock device 10R and the left door lock device <NUM> are substantially of right-and-left symmetrical configuration, and partially of right-and-left asymmetrical configuration. Hereinafter, as for respective elements that are of right-and-left symmetrical configuration in the right door lock device 10R and the left door lock device <NUM>, the element in the right door lock device 10R is given a numeral with a symbol R, and the element in the left door lock device <NUM> is given a numeral with a symbol L. Each of elements having shapes identical to each other or substantially identical to each other in the right door lock device 10R and the left door lock device <NUM> is given a numeral without the symbol R or the symbol L. Each direction in the drawings is, as necessary, indicated by an arrow with a symbol "U" for the upside of the vehicle, an arrow with a symbol "D" for the downside of the vehicle, an arrow with a symbol "F" for the front side of the vehicle, an arrow with a symbol "B" for the back side of the vehicle, an arrow with a symbol "O" for the outer side of the vehicle, or an arrow with a symbol "I" for the inner side of the vehicle. First of all, the right door lock device 10R is explained.

The right door lock device 10R is provided with a door latch device 12R, a casing (housing) 14R, a cover (housing) 16R, a coupler <NUM> for electrical connection with an external device, a waterproof cover (housing) 20R, a coupler seal (waterproof seal) <NUM>, a latch seal <NUM>, and a cable cover 26R.

The waterproof cover 20R covers a border portion between the casing 14R and the cover 16R in the upper face and the front face of the right door lock device 10R. The coupler seal <NUM> covers a periphery of the coupler <NUM>. The latch seal <NUM> covers an area extending from the upper portion and both sides of the door latch device 12R to the cable cover 26R located on the inner surface side of the cover 16R.

Here, although the casing 14R and the cover 16R are explained as separated parts having respective names different from each other, the casing 14R and the cover 16R are integrally combined with each other and function as a housing that covers internal parts, and the waterproof cover 20R is also a housing that functions as an outer shell member. The casing 14R may also be referred to as an outer housing. The cover 16R may also be referred to as an inner housing. The waterproof cover 20R may also be referred to as an upper housing.

The door latch device 12R is a device capable of being engaged/disengaged with/from a striker arranged in a vehicle body to change the door of the vehicle into a closed state or an openable state. The door latch device 12R is fixed to a vehicle-rear-side portion of the casing 14R, and supported by the casing 14R in this state. The door latch device 12R is provided with a body 12Ra, a cover plate 12Rb, and a latch mechanism 12Rc. The latch mechanism 12Rc is provided to the body 12Ra, and covered with the cover plate 12Rb. The cover plate 12Rb has an approach groove 12Rd, and is attached to the body 12Ra in such a manner that the approach groove 12Rd leads to the latch mechanism 12Rc in a vehicle interior-exterior direction. The approach groove 12Rd is a groove into which the striker of the vehicle enters when the door of the vehicle is closed.

The coupler <NUM> is an electrical connection portion to be connected with a harness connector, and has a coupler wall 18a formed in a cylindrical shape and projecting from the side face of the cover 16R to the inside of the vehicle, and a plurality of coupler pins 18b mounted upright on the inner face of the coupler wall 18a. The harness connector is fitted in a connector groove 18c in the inside of the coupler wall 18a. The coupler wall 18a may be, as viewed in a side view, formed in not only a circular shape but also a non-square shape such as an oval shape, or a rectangular shape having four corners rounded smoothly. The coupler wall 18a is arranged in a projecting manner toward the inside of the vehicle, and inserted into a mounting hole 42a (see <FIG>) as described later.

The right door lock device 10R is provided with a motor and a switch in the inside thereof, and a plurality of terminals are connected to the motor and the switch to form a circuit. The end portion of the terminal is formed as the coupler pin 18b.

As illustrated in <FIG>, the coupler seal <NUM> before assembly is formed in an elongated shape having a substantially square shape as viewed in a sectional view, and has an inner peripheral surface 22a, an outer peripheral surface 22b, a sealing surface (fixing surface) 22c, and a panel contact surface 22d. The coupler seal <NUM> has an inclined surface 22e formed at one end thereof. The one end where the inclined surface 22e is formed in the coupler seal <NUM> is also referred to as a "wrapping finish end", and the other end of the coupler seal <NUM> is also referred to as a "wrapping start end". The inclined surface 22e forms an acute angle part 22f with the inner peripheral surface 22a, and forms an obtuse angle part <NUM> with the outer peripheral surface 22b. An angle θ1 of the acute angle part 22f is <NUM> degrees, and an angle θ2 of the obtuse angle part <NUM> is <NUM> degrees. The coupler seal <NUM> is a waterproof seal capable of being bent due to its flexibility. The coupler seal <NUM> has a mount (not illustrated in the drawings) stuck on the sealing surface 22c in advance, and the mount is peeled in the assembly process of the right door lock device 10R so that the sealing surface 22c is exposed thus sticking the coupler seal <NUM> on the periphery of the coupler wall 18a due to adherence of the sealing surface 22c. Here, as described later, the coupler seal <NUM> is also applied to the left door lock device <NUM> in common.

As illustrated in part (a) of <FIG>, the coupler seal <NUM> is, for example, cut out from a large-area sheet of a sealing material <NUM>. That is, the sealing material <NUM> is cut along multiple parallel lines to form elongated materials, and the center portion of each elongated material is further cut at an angle of <NUM> degrees to obtain two coupler seals <NUM>, which have shapes identical to each other, per one elongated material. In this manner, the total area of the sealing material <NUM> can be used as the coupler seal <NUM> without producing parts to be discarded thus achieving a high yield. Furthermore, it is unnecessary to form a slit as in the waterproof seal described in <CIT> thus manufacturing easily the coupler seal <NUM>. Here, although the coupler seals <NUM> cut out from the sealing material <NUM> in this manner have shapes identical to each other, it is unnecessary to form the coupler seals <NUM> having shapes accurately identical to each other. It is needless to say that the width, the length, and the cut-out angle of the coupler seal <NUM> may have some tolerances provided that the coupler seal <NUM> is capable of exhibiting a waterproof property with respect to the coupler <NUM>. The explanation above is also applied to the case in part (b) of <FIG>.

Furthermore, as illustrated in part (b) of <FIG>, it is also possible to use a sealing material <NUM> that is formed in a considerably long shape and wrapped around a roller <NUM>. That is, an elongated parallelogram member obtained by cutting continuously the sealing material <NUM> at an angle of <NUM> degrees may be used as the coupler seal <NUM>. In this case also, the sealing material <NUM> can be made without producing parts to be discarded thus achieving a high yield.

As illustrated in part (a) of <FIG>, the coupler seal <NUM> is fixed so that the coupler seal <NUM> is wrapped around the coupler wall 18a while the inner peripheral surface 22a is brought into contact with an outer peripheral wall 18ao of the coupler wall 18a, and the inner peripheral surface 22a is further brought into contact with the inclined surface 22e and overlapped with the inclined surface 22e at both end portions of the coupler seal <NUM>.

The inclined surface 22e is located below the coupler wall 18a, and obliquely directed downward with respect to the outer peripheral wall 18ao in a tangential direction. Consequently, the coupler seal <NUM> is particularly effective against the water permeation from above. The angle of the acute angle part 22f is <NUM> degrees thus easily setting the inclined surface 22e in the tangential direction of the outer peripheral wall 18ao. When the angle of the acute angle part 22f is excessively large, it is difficult to wrap the coupler seal <NUM> around the coupler wall 18a in the area where the inner peripheral surface 22a is overlapped with the inclined surface 22e, and when the angle of the acute angle part 22f is excessively small, the inclined surface 22e is lengthened. In this respect, it is preferable to set the angle of the acute angle part 22f in the range from <NUM> degrees to <NUM> degrees.

The coupler seal <NUM> is wrapped around the periphery of the coupler wall 18a at substantially <NUM> degrees from the corner portion located on the inner peripheral surface-22a side of the wrapping start end to the acute angle part 22f located at the wrapping finish end thus forming the coupler seal <NUM> into a shape that is conceptually close to the number "<NUM>". In the coupler seal <NUM>, the corner portion located on the inner peripheral surface 22a side of the wrapping start end coincides with the obtuse angle part <NUM> of the inclined surface 22e. Consequently, the coupler wall 18a is sufficiently surrounded by the coupler seal <NUM> so as to obtain the waterproof property, and the coupler seal <NUM> has a length required only for being wrapped around the coupler wall 18a thus suppressing waste sealing materials. The inner peripheral surface 22a and the inclined surface 22e are set in an overlapping manner and hence, it may be possible to have some space <NUM> in the vicinity of the acute angle part 22f.

As illustrated in part (a) of <FIG> and part (a) of <FIG>, the side face of the cover 16R forms a flat portion 36R in the periphery of the coupler wall 18a. The flat portion 36R is a part where the sealing surface 22c of the coupler seal <NUM> is stuck and fixed. The flat portion 36R is formed in an extending manner over an upper flat portion 36Ra that is a part of the waterproof cover 20R and a lower flat portion 36Rb that is a part of the cover 16R. In <FIG>, each of the waterproof covers 20R and <NUM> is illustrated with a dot hatch pattern so that the waterproof covers 20R and <NUM> are easily differentiated from other parts. The upper flat portion 36Ra and the lower flat portion 36Rb have two boundaries 38Ra and 38Rb therebetween, respective gaps of the boundaries 38Ra and 38Rb being sufficiently narrowed, and are formed in such a manner that the dimension of the gap is substantially set to <NUM>. Each of the boundaries 38Ra and 38Rb is formed in a substantially tangential direction with respect to the coupler wall 18a formed in a circular shape, and directed downward or obliquely downward with respect to the coupler wall 18a along with the extension thereof from the coupler wall 18a to the outside.

The upper flat portion 36Ra is formed in such a manner that the upper flat portion 36Ra surrounds the upper half portion and the front portion of the coupler wall 18a, and the lower flat portion 36Rb is formed in such a manner that the lower flat portion 36Rb surrounds the remaining portion of the coupler wall 18a. The upper flat portion 36Ra has a length sufficient to fix the coupler seal <NUM>. The upper flat portion 36Ra surrounds the coupler wall 18a in an extending manner over substantially <NUM> degrees.

The lower flat portion 36Rb has a wrapping start flat portion 40Ra extending from the lower side to the right side of the coupler wall 18a illustrated in part (a) of <FIG>, a wrapping finish flat portion 40Rb located below the coupler wall 18a, and a guide projecting portion 40c formed in a boundary between the wrapping start flat portion 40Ra and the wrapping finish flat portion 40Rb, the guide projecting portion 40c being formed in a linear shape. The coupler seal <NUM> is wrapped around the coupler wall 18a from the wrapping start flat portion 40Ra to the wrapping finish flat portion 40Rb via the upper flat portion 36Ra.

The wrapping start flat portion 40Ra has a length sufficient to stably fix the wrapping start end of the coupler seal <NUM>. In the same manner, the wrapping finish flat portion 40Rb has a length sufficient to stably fix the wrapping finish end of the coupler seal <NUM>. Assuming that the boundary between the wrapping start flat portion 40Ra and the wrapping finish flat portion 40Rb is an intermediate point of the inclined surface 22e, each of the wrapping start flat portion 40Ra and the wrapping finish flat portion 40Rb surrounds the coupler wall 18a in an extending manner over substantially <NUM> degrees thus achieving a well-balanced structure.

As illustrated in <FIG>, the guide projecting portion 40c is formed in a narrow-and-low projecting shape, and constitutes a guide for locating the inner peripheral surface 22a at the wrapping start end of the coupler seal <NUM> and for locating the inclined surface 22e at the wrapping finish end.

As illustrated in part (a) of <FIG> and <FIG>, the coupler wall 18a has a cylinder part 18aa being constant in height from the flat portion 36R, and a projecting portion 18ab that further projects from the cylinder part 18aa. The height of the cylinder part 18aa from the flat portion 36R is slightly greater than the thickness of the coupler seal <NUM> when the coupler seal <NUM> is not compressed. The projecting portion 18ab is located below the coupler wall 18a, and formed in an extending manner over substantially <NUM> degrees with respect to the entire circumference of the coupler wall 18a. That is, assuming the position of the coupler wall 18a on a back side in the front-back direction of the vehicle as <NUM> degree with respect to the center of the coupler wall 18a, the height of the coupler wall 18a is, in the clockwise direction, gradually increased in the range from <NUM> degree to substantially <NUM> degrees, the height increased is maintained in the range from substantially <NUM> degrees to substantially <NUM> degrees, and is steeply decreased in the range from substantially <NUM> degrees to <NUM> degrees. The highest portion of the projecting portion 18ab includes the part located directly below the coupler wall 18a, and the height of the highest portion from the flat portion 36R set as a reference is slightly greater than the total thickness of the thickness of the coupler seal <NUM> when the coupler seal <NUM> is not compressed and the thickness of a mounting panel <NUM>.

When the coupler wall 18a is inserted into the mounting hole 42a of the mounting panel <NUM>, the projecting portion 18ab functions as a guide thus performing easily an insertion work of the coupler wall 18a. For example, in a state that the right door lock device 10R is slightly tilted, the projecting portion 18ab is first brought into contact with the inner edge of the mounting hole 42a, the right door lock device 10R is then raised and hence, the cylinder part 18aa is slightly inserted into the mounting hole 42a (see <FIG>). Thereafter, the coupler seal <NUM> is compressed by a predetermined fastening operation thus achieving the waterproof function of the coupler seal <NUM>.

It is preferable to set the projecting portion 18ab on the lower side or the lateral side of the coupler wall 18a while avoiding the upper side of the coupler wall 18a so as to be easily and visually recognized from above. Furthermore, in order to achieve the function of guiding the coupler wall 18a, it is preferable to form the projecting portion 18ab in the range of <NUM> degrees or less with respect to the entire circumference of the coupler wall 18a. The projecting portion 18ab is connected to the constant height part of the cylinder part 18aa by way of respective inclined surfaces located on both sides of the projecting portion 18ab and hence, the coupler wall 18a is smoothly guided.

The right door lock device 10R is explained heretofore. While the right side of <FIG>, part (a) of <FIG>, part (a) of <FIG>, part (a) of <FIG>, and part (a) of <FIG> are explanatory views of the right door lock device 10R, the left door lock device <NUM> is illustrated in the left side of <FIG>, part (b) of <FIG>, part (b) of <FIG>, part (b) of <FIG>, and part (b) of <FIG> from respective viewpoints corresponding to the above drawings in this order. As mentioned above, in elements that are of right-and-left symmetrical configuration in the left door lock device <NUM> and the right door lock device 10R, each of the elements in the left door lock device <NUM> is given a numeral "L" in place of the numeral "R", and the detailed explanations thereof are omitted. The left door lock device <NUM> has the functions and advantageous effects that are similar to those of the right door lock device 10R.

The right door lock device 10R and the left door lock device <NUM> mutually use the coupler seal <NUM> as waterproof means for the coupler wall 18a. Hereinafter, the coupler seal <NUM>, and the flat portion 36R and the flat portion <NUM> on which the coupler seal <NUM> is stuck are explained. The coupler wall 18a is projected to the inside of the vehicle and hence, the right door lock device 10R is projected in the leftward direction, and the left door lock device <NUM> is projected in the rightward direction.

As illustrated in part (a) of <FIG> and part (b) of <FIG>, the right door lock device 10R and the left door lock device <NUM> mutually use the coupler seal <NUM>; that is, the coupler seals <NUM> in the right door lock device 10R and the left door lock device <NUM> have shapes identical to each other. Consequently, as for the coupler seal <NUM>, only one kind of coupler seal is required thus performing easily parts management, and it is unnecessary to prepare parts that are of right-and-left symmetrical configuration thus manufacturing the coupler seal <NUM> in one process, and reducing costs as a result. Although the coupler seals <NUM> in the right door lock device 10R and the left door lock device <NUM> have shapes identical to each other, as explained with reference to <FIG>, the coupler seal <NUM> may have some tolerances in size thereof.

In the right door lock device 10R and the left door lock device <NUM>, the coupler seals <NUM> are wrapped around the respective coupler walls 18a in directions identical to each other. That is, assuming the wrapping start end as a reference, each of the coupler seals <NUM> is wrapped around the coupler wall 18a in the counterclockwise direction. Consequently, a worker can perform the work of wrapping and fixing the coupler seals <NUM> almost without recognizing a distinction between the right door lock device 10R and the left door lock device <NUM>, and as for the coupler seal <NUM>, it is unnecessary to perform pretreatment such as stretching the slit of the waterproof seal described in <CIT> thus achieving good workability. Furthermore, the coupler seal <NUM> is formed in a simple shape, and has no weakened part such as the slit and hence, it is unnecessary to have excessive allowances in terms of the shape of the coupler seal <NUM>.

As illustrated in part (a) of <FIG> and part (b) of <FIG>, in the right door lock device 10R and the left door lock device <NUM>, the flat portion 36R and the flat portion <NUM> have shapes identical to each other as viewed in a side view. That is, in the right door lock device 10R and the left door lock device <NUM>, the flat portion 36R and the flat portion <NUM> are of right-and-left asymmetrical configuration. This is because the shape of the flat portion 36R or the flat portion <NUM> is formed in accordance with the sticking configuration of the coupler seal <NUM>. The upper flat portion 36Ra of the flat portion 36R and the upper flat portion 36La of the flat portion <NUM> are of right-and-left symmetrical configuration.

The lower flat portion 36Rb of the flat portion 36R and a lower flat portion 36Lb of the flat portion <NUM> basically have shapes identical to each other, and the latter is formed in a shape that is rotationally shifted to some degree in the clockwise direction with respect to the former. Consequently, a wrapping start flat portion 40La has a length sufficient to stably fix the wrapping start end of the coupler seal <NUM>. In the same manner, a wrapping finish flat portion 40Lb has a length sufficient to stably fix the wrapping finish end of the coupler seal <NUM>. Assuming that the boundary between the wrapping start flat portion 40La and the wrapping finish flat portion 40Lb is an intermediate point of the inclined surface 22e, each of the wrapping start flat portion 40La and the wrapping finish flat portion 40Lb surrounds the coupler wall 18a in an extending manner over substantially <NUM> degrees thus achieving a well-balanced structure.

The waterproof means of applying the pair of coupler seals <NUM> to the respective coupler walls 18a in the right-and-left door lock devices in this manner, and wrapping the coupler seals <NUM> around the respective coupler walls 18a in the directions identical to each other can be applied not only to the door lock device pair <NUM> including the right door lock device 10R and the left door lock device <NUM> but also to a general electric device pair in which respective electric devices are attached to the mounting holes 42a of the mounting panels <NUM> by way of the couplers <NUM> on the right and left sides of the vehicle.

Claim 1:
A door lock device pair (<NUM>) applied to a vehicle, the door lock device pair (<NUM>) comprising:
a right door lock device (10R); and
a left door lock device (<NUM>), wherein
each of the right door lock device (10R) and the left door lock device (<NUM>) includes:
housings formed in a casing (14R,<NUM>), a cover (16R,<NUM>) and a waterproof cover (20R,<NUM>);
a coupler wall (18a) formed in a tubular shape and projecting from the cover (16R,<NUM>);
a flat portion (36R,<NUM>) formed in a periphery of the coupler wall (18a) and formed in an extending manner over an upper flat portion (36Ra,36La) that is a part of the waterproof cover (20R,<NUM>) and a lower flat portion (36Rb,36Lb) that is a part of the cover (16R,<NUM>)
and
a waterproof seal (<NUM>) fixed to the flat portion (36R, <NUM>) and being wrapped around and cover an outer peripheral wall (18ao) of the coupler wall (18a),
the waterproof seal (<NUM>) includes:
an inner peripheral surface (22a);
an outer peripheral surface (22b);
wherein the waterproof seal (<NUM>) further includes an inclined surface (22e) that forms an acute angle with respect to the inner peripheral surface (22a) at one end of the inclined surface (22e) and forms an obtuse angle with respect to the outer peripheral surface (22b) at another end of the inclined surface (22e),
the inner peripheral surface (22a) is brought into contact with the outer peripheral wall (18ao) of the coupler wall (18a) in an extending manner around the outer peripheral wall (18ao) of the coupler wall (18a) and further brought into contact with the inclined surface (22e), and
the waterproof seals (<NUM>) in the right door lock device (10R) and the left door lock device (<NUM>) have respective shapes identical to each other, and the waterproof seals (<NUM>) are wrapped around the respective outer peripheral walls (18ao) of the coupler walls (18a) in the respective directions identical to each other,
characterized in that
the lower flat portions (36Rb, 36Lb) in the right door lock device (10R) and the left door lock device (<NUM>) have respective shapes identical to each other as viewed in a side view and are of right-and-left asymmetrical configuration, and each of the flat portions (36R,<NUM>) is formed in a shape extending along a fixing surface of the waterproof seal (<NUM>).