TERMINAL FITTING

A terminal fitting to be connected to a mating terminal in a form of a flat plate, the terminal fitting including: a body including a pair of side walls arranged to face each other and a coupling wall coupling the pair of side walls and capable of accommodating the mating terminal inside; and an obliquely wound coil spring arranged along the coupling wall inside the body, electrically connected to the body and configured to resiliently contact the mating terminal accommodated inside the body.

BACKGROUND

A technique disclosed by this specification relates to a terminal fitting.

A power supply device to be installed in an electric or hybrid vehicle includes a battery pack formed by combining a plurality of unit cells and a casing for accommodating this battery pack. A connector fitting chamber in which a male terminal electrically connected to the battery pack is arranged inside is provided in the casing, and the power supply device is connected to an external device by fitting a mating connector housing into this connector fitting chamber (see Japanese Unexamined Patent Publication No. 2017-54588).

SUMMARY

When maintenance or exchange is made, the power supply device needs to be removed from a vehicle body. For example, if the power supply device is installed in a lower part of a vehicle body, a worker needs to get under the vehicle body and remove the connector housing from the power supply device. Thus, a workload is large.

A terminal fitting disclosed by this specification is a terminal fitting to be connected to a mating terminal in the form of a flat plate, the terminal fitting includes a body having a pair of side walls arranged to face each other and a coupling wall coupling the pair of side walls and capable of accommodating the mating terminal inside, and a contact arranged along the coupling wall inside the body, electrically connected to the body and configured to resiliently contact the mating terminal accommodated inside the body, wherein one side wall of the pair of side walls includes an insertion opening, the mating terminal being inserted into the body through the insertion opening, and the other side wall of the pair of side walls includes a withdrawal opening, the mating terminal being withdrawn from the body through the withdrawal opening.

According to the above configuration, in connecting the mating terminal to the terminal fitting, the mating terminal may be inserted into the body through the insertion opening by being slid in parallel to the coupling wall. Further, in separating the mating terminal from the terminal fitting, the mating terminal may be withdrawn to the outside of the body through the withdrawal opening by being similarly slid in parallel to the coupling wall. The mating terminal can be easily inserted into and withdrawn from the terminal fitting by being slid in this way. Thus, a workload can be reduced also when a worker has to perform an operation in a somewhat uncomfortable posture such as when the worker gets under a vehicle body to perform an operation.

In the above configuration, the contact may be a coiled obliquely wound coil spring formed by winding a conductive wire material a plurality of times such that the wire material is inclined in one direction with respect to an axis line, and the obliquely wound coil spring may be arranged in contact with the coupling wall in such an orientation that the axis line is parallel to the coupling wall.

Further, the obliquely wound coil spring may be arranged such that the axis line is perpendicular to the pair of side walls and the wire material is inclined in a direction to approach the other side wall from the one side wall with distance from the coupling wall.

According to these configurations, in inserting the mating terminal into the body through the insertion opening, the obliquely wound coil spring is tilted and deformed to reduce a spring height (dimension in a direction perpendicular to the axis line). In this way, the mating terminal can be inserted with a low insertion force. Further, also in withdrawing the mating terminal to the outside of the body through the withdrawal opening, a force acts from the mating terminal on the obliquely wound coil spring in a direction to reduce the spring height (dimension in the direction perpendicular to the axis line). Thus, the mating terminal can be withdrawn with a low withdrawal force.

In the above configuration, the contact may be a resilient contact piece in the form of a leaf spring continuous from the coupling wall n and extending along the coupling wall.

In the above configuration, the body may include a pair of the coupling walls and a pair of the contacts arranged to face each other.

According to these configurations, the mating terminal is sandwiched by the pair of contacts if the mating terminal is inserted into the terminal fitting. In this way, the contacts can be brought into contact with the mating terminal with a constant contact pressure and the reliability of electrical connection of the terminal fitting and the mating terminal can be enhanced.

According to the terminal fitting disclosed by this specification, a workload can be reduced.

DETAILED DESCRIPTION OF EMBODIMENTS

First Embodiment

A first embodiment is described with reference toFIGS. 1 to 7. A terminal fitting of this embodiment is a female terminal fitting1connected to a wire extending from a device installed in a vehicle. This female terminal fitting1is connected to a male terminal fitting provided in a power storage device installed in the vehicle. The male terminal fitting includes a tab portion T in the form of a flat plate. Only the tab portion T is schematically shown for the male terminal fitting with other parts omitted inFIGS. 1 to 4.

As shown inFIG. 1, the female terminal fitting1includes a terminal body10made of metal and four obliquely wound coil springs20(corresponding to a contact portion) held in this terminal body10by four holding shafts30.

As shown inFIG. 1, the terminal body10includes a rectangular tube portion11(corresponding to a body portion or body) for receiving the tab portion T of the male terminal fitting inside and a wire connecting portion18continuous from this rectangular tube portion11.

As shown inFIG. 1, the rectangular tube portion11is a part having a rectangular tube shape open on both ends, and includes a bottom wall portion12, a ceiling wall portion13and a pair of side wall portions (or side walls) (first side wall portion14and second side wall portion15). The pair of side wall portions14,15are rectangular plate-like parts arranged to face each other. The bottom wall portion12is a rectangular plate-like part coupling the pair of side wall portions14,15. The ceiling wall portion13is a rectangular plate-like part arranged to face the bottom wall portion12and coupling the pair of side wall portions14,15.

The first side wall portion14includes an insertion slit16(corresponding to an insertion opening) serving as an entrance for the tab portion T, and the second side wall portion15includes a withdrawal slit17(corresponding to a withdrawal opening) serving as an exit for the tab portion T. The insertion slit16is arranged at a middle position between the bottom wall portion12and the ceiling wall portion13, and extends parallel to the bottom wall portion12and the ceiling wall portion13from one opening edge (opening edge on a front side ofFIG. 1) of the rectangular tube portion11to the vicinity of the other opening edge (opening edge on a back side ofFIG. 1). The withdrawal slit17is similar to the insertion slit16. Slit widths of the insertion and withdrawal slits16,17are somewhat larger than a thickness of the tab portion T, and the tab portion T can be inserted into and withdrawn from the rectangular tube portion11through the insertion and withdrawal slits16,17.

As shown inFIG. 1, the wire connecting portion18is a flat plate-like part continuous from the bottom wall portion12and, for example, a core C of the wire is connected by resistance welding.

The obliquely wound coil spring20is in the form of a coil formed by winding a conductive wire material21a plurality of times. In this obliquely wound coil spring20, the wire material21is wound to be inclined in one direction with respect to a coil axis A (corresponding to an axis line) unlike in a general coil spring100. In the general coil spring100shown inFIG. 7, a straight line L101connecting an arbitrary point P101of a wire material101and a point P102distant from the arbitrary point P101by a half circumference and a straight line L102connecting the point P102and a point P103distant from the point P2by a half circumference are inclined toward opposite sides with respect to a coil axis A100. In contrast, in the obliquely wound coil spring20shown inFIG. 6, a straight line L1connecting an arbitrary point P1of the wire material21and a point P2distant from the arbitrary point P1by a half circumference and a straight line L2connecting the point P2and a point P3distant from the point P2by a half circumference are inclined toward the same side with respect to the coil axis A.

The obliquely wound coil spring20thus configured is so deformed that winding is tilted to reduce a spring height (dimension in a direction perpendicular to the coil axis A) if a load is applied to the coil axis A in a perpendicular direction.

Each of the four obliquely wound coil springs20is arranged in such an orientation that the coil axis A is parallel to the bottom wall portion12and the ceiling wall portion13and perpendicular to the pair of side wall portions14,15as shown inFIGS. 1 and 5. Two of the four obliquely wound coil springs20are arranged along the bottom wall portion12, and the other two are arranged along the ceiling wall portion13. Note that, in the description of this specification, the obliquely wound coil springs20arranged along the bottom wall portion12are written as “first obliquely wound coil springs20A” and the obliquely wound coil springs20arranged along the ceiling wall portion13are written as “second obliquely wound coil springs20B” when the obliquely wound coil springs20arranged along the bottom wall portion12and those arranged along the ceiling wall portion13are distinguished from each other, whereas no suffix is added to the reference sign of the obliquely wound coil springs when the obliquely wound coil springs20are collectively termed without being distinguished.

Each of the four holding shafts30is a round bar made of metal and, as shown inFIGS. 1 and 5, penetrates through the inside of the corresponding one of the four obliquely wound coil springs20with one end fixed to the first side wall portion14and the other end fixed to the second side wall portion15. As shown inFIG. 5, each of two holding shafts30holding two first obliquely wound coil springs20A is so arranged that a clearance to the bottom wall portion12is substantially equal to an outer diameter of the wire material21constituting the first obliquely wound coil spring20A, and the first obliquely wound coil spring20A is held in contact with the bottom wall portion12. In this way, the first obliquely wound coil spring20A is electrically connected to the terminal body10. Similarly, each of two holding shafts30holding two second obliquely wound coil springs20B is so arranged that a clearance to the ceiling wall portion13is substantially equal to the outer diameter of the wire material21constituting the second obliquely wound coil spring20B, and the second obliquely wound coil spring20B is held in contact with the ceiling wall portion13. In this way, the second obliquely wound coil spring20B is electrically connected to the terminal body10.

As shown inFIG. 5, the first obliquely wound coil spring20A is such that the wire material21is inclined to approach the second side wall portion15from the first side wall portion14(from a left-lower side to a right-upper side ofFIG. 5) with distance from the bottom wall portion12. Further, the second obliquely wound coil spring20B is such that the wire material21is inclined to approach the second side wall portion15from the first side wall portion14(from a left-upper side to a right-lower side ofFIG. 5) with distance from the ceiling wall portion13.

A distance between the bottom wall portion12and the ceiling wall portion13is smaller than the sum of heights (dimensions in the direction perpendicular to the coil axes A) of the first and second obliquely wound coil springs20A,20B in a free state where no load is applied and the thickness of the tab portion T. A distance between the obliquely wound coil springs20A,20B facing each other is smaller than the thickness of the tab portion T in a state where the tab portion T is not inserted in the rectangular tube portion11and no load is applied to the obliquely wound coil springs20A,20B.

In connecting the male terminal fitting and the female terminal fitting1, the tab portion T is caused to enter the rectangular tube portion11through the insertion slit16(in a direction indicated by an arrow inFIG. 1) by being slid in parallel to the bottom wall portion12and the ceiling wall portion13. The tab portion T is inserted into the clearance between the first and second obliquely wound coil springs20A,20B and moves toward the second side wall portion15while pressing the first and second obliquely wound coil springs20A,20B.

As the tab portion T moves toward the second side wall portion15, a force acts to push arbitrary contact points P20A (seeFIG. 3) of the first obliquely wound coil springs20A with the tab portion T in a direction from the first side wall portion14toward the second side wall portion15. Here, as described above, the wire material21is inclined to approach the second side wall portion15from the first side wall portion14with distance from the bottom wall portion12in the first obliquely wound coil spring20A. Thus, the first obliquely wound coil spring20A is tilted by a pressing force from the tab portion T and deformed to reduce the spring height (dimension in the direction perpendicular to the coil axis A). The same holds true also for the second obliquely wound coil springs20B. In this way, the tab portion T can be inserted with a low insertion force.

With the tab portion T inserted to a proper position (position shown inFIGS. 2 and 3) with respect to the female terminal fitting1, the first obliquely wound coil springs20A are sandwiched between the tab portion T and the bottom wall portion12and the second obliquely wound coil springs20B are sandwiched between the tab portion T and the ceiling wall portion13. By the insertion of the tab portion T, the first obliquely wound coil springs20A are deformed to reduce the spring height (dimension in the direction perpendicular to the coil axes A). By resilient restoring forces of the first obliquely wound coil springs20A, the first obliquely wound coil springs20A are in contact with the tab portion T and the bottom wall portion12with a constant contact pressure. Similarly, the second obliquely wound coil springs20B are also in contact with the tab portion T and the ceiling wall portion13with a constant contact pressure. In this way, the female terminal fitting1and the male terminal fitting are electrically connected.

In separating the male terminal fitting from the female terminal fitting1, the tab portion T is withdrawn to the outside of the rectangular tube portion11through the withdrawal slit17(in a direction indicated by an arrow inFIG. 4) by being slid in parallel to the bottom wall portion17and the ceiling wall portion13. At this time, similarly when the tab portion T is caused to enter the rectangular tube portion11, a force acts to push the contact points P20A of the first obliquely wound coil springs20A with the tab portion T in the direction from the first side wall portion14toward the second side wall portion15. Specifically, a force acts from the tab portion T in such a direction that the first obliquely wound coil springs20A are tilted to reduce the spring height (dimension in the direction perpendicular to the coil axis A). The same holds true also for the second obliquely wound coil springs20B. In this way, the tab portion T can be withdrawn with a low withdrawal force.

If the tab portion T is going to move toward the first side wall portion14(i.e. in a direction to be withdrawn through the insertion slit16), a force acts to push the contact points P20A of the first obliquely wound coil springs20A with the tab portion T toward the first side wall portion14. Here, as described above, the wire material21is inclined to approach the second side wall portion15from the first side wall portion14with distance from the bottom wall portion12in the first obliquely wound coil springs20A. Thus, the first obliquely wound coil springs20A hold on to be deformed to rise with respect to the coil axes A by a pressing force from the tab portion T. The same holds true also for the second obliquely wound coil springs20B. Thus, separation resistance to the tab portion T increases and the tab portion T is less likely to be withdrawn to outside through the insertion slit16. As just described, inserting and withdrawing directions of the tab portion T into and from the female terminal fitting1are restricted to be one direction (direction to enter from the insertion slit16and exit from the withdrawal slit17).

As described above, according to this embodiment, the female terminal fitting1is a terminal fitting to be connected to the flat plate-like tab portion T of the male terminal fitting and includes the rectangular tube portion11having the pair of side wall portions (first and second side wall portions14,15) arranged to face each other and the bottom wall portion12and the ceiling wall portion13coupling the pair of side wall portions and capable of accommodating the tab portion T inside, and the first and second obliquely wound coil springs20A,20B arranged inside the rectangular tube portion11. The first obliquely wound coil springs20A are arranged along the bottom wall portion12and electrically connected to the rectangular tube portion11and can resiliently contact the tab portion T accommodated inside the rectangular tube portion11. The second obliquely wound coil springs20B are arranged along the ceiling wall portion13and electrically connected to the rectangular tube portion11and can resiliently contact the tab portion T accommodated inside the rectangular tube portion11. The first side wall portion14includes the insertion slit16through which the tab portion T is inserted into the rectangular tube portion11, and the second side wall portion15includes the withdrawal slit17through which the tab portion T is withdrawn from the rectangular tube portion11.

According to the above configuration, in connecting the male terminal fitting to the female terminal fitting1, the tab portion T may be inserted into the rectangular tube portion11though the insertion slit16by being slid in parallel to the bottom wall portion12and the ceiling wall portion13. Further, in separating the male terminal fitting from the female terminal fitting1, the tab portion T may be withdrawn from the rectangular tube portion11though the withdrawal slit17by being similarly slid in parallel to the bottom wall portion12and the ceiling wall portion13. Since the tab portion T can be easily inserted into and withdrawn from the female terminal fitting1by being slid in this way, a workload can be reduced also when a worker has to perform an operation in a somewhat uncomfortable posture such as when the worker gets under a vehicle body to perform an operation.

Further, the first obliquely wound coil springs20A are so arranged that the coil axes A are perpendicular to the pair of side wall portions14,15and the wire material21is inclined to approach the second side wall portion15from the first side wall portion14with distance from the bottom wall portion12. Similarly, the second obliquely wound coil springs20B are so arranged that the coil axes A are perpendicular to the pair of side wall portions14,15and the wire material21is inclined to approach the second side wall portion15from the first side wall portion14with distance from the ceiling wall portion13.

According to this configuration, in inserting the tab portion T into the rectangular tube portion11through the insertion slit16, the obliquely wound coil springs20A,20B are tilted and deformed to reduce the spring height (dimension in the direction perpendicular to the coil axis A). In this way, the tab portion T can be inserted with a low insertion force. Also in withdrawing the tab portion T to the outside of the rectangular tube portion11through the withdrawal slit17, a force acts from the tab portion T in a direction to deform the obliquely wound coil springs20A,20B to reduce the spring height (dimension in the direction perpendicular to the coil axes A). Thus, the tab portion T can be withdrawn with a low withdrawal force.

Further, the rectangular tube portion includes the bottom wall portion12and the ceiling wall portion13arranged to face each other and the first and second obliquely wound coil springs20A,20B.

According to this configuration, if the tab portion T is inserted into the female terminal fitting1, the tab portion T is sandwiched by the first and second obliquely wound coil springs20A,20B. In this way, the obliquely wound coil springs20A,20B can be brought into contact with the tab portion T with a constant contact pressure and the reliability of electrical connection of the female terminal fitting1and the male terminal fitting can be enhanced.

Second Embodiment

Next, a second embodiment is described with reference toFIGS. 8 to 12. A female terminal fitting40of this embodiment differs from that of the first embodiment in including resilient contact pieces51A,51B in the form of leaf springs instead of the obliquely wound coil springs20.

The female terminal fitting40is made of metal and includes, as shown inFIG. 8, a rectangular tube portion41for receiving a tab portion T of a male terminal fitting inside, a wire connecting portion18continuous from this rectangular tube portion41and a pair of resilient contact pieces (first and second resilient contact pieces51A,51B) arranged inside the rectangular tube portion41. In the following description, components similar to those of the first embodiment are denoted by the same reference signs and not described. As in the first embodiment, only the tab portion T is schematically shown for the male terminal fitting with other parts omitted inFIGS. 8 to 11.

As shown inFIG. 8, the rectangular tube portion41is a part having a rectangular tube shape open on both ends, and includes a bottom wall portion12, a ceiling wall portion13and a pair of side wall portions (first side wall portion42and second side wall portion15). The bottom wall portion12, the ceiling wall portion13and the second side wall portion15are configured similarly to those of the first embodiment. The second side wall portion15includes a withdrawal slit17. The withdrawal slit17is arranged at a middle position between the bottom wall portion12and the ceiling wall portion13and extends from one opening edge (opening edge on a front side ofFIG. 8) of the rectangular tube portion41to the vicinity of the other opening edge (opening edge on a back side ofFIG. 8).

As shown inFIG. 8, the first side wall portion42is arranged to face the second side wall portion15and composed of a straight wall portion43and a pair of curved portions (first and second curved portions44,45). The straight wall portion43is a strip-like wall portion partially linking the bottom wall portion12and the ceiling wall portion13, and arranged adjacent to the other opening edge (opening edge on the back side ofFIG. 8) of the rectangular tube portion41. The first curved portion44is a wall portion extending from the bottom wall portion12and folded inwardly of the rectangular tube portion41, and arranged between the one opening edge (opening edge on the front side ofFIG. 8) of the rectangular tube portion41and the straight wall portion43. The second curved portion45is a wall portion extending from the ceiling wall portion13and folded inwardly of the rectangular tube portion41, and arranged between the one opening edge of the rectangular tube portion41and the straight wall portion43. A clearance between the two curved portions44,45serves as an insertion opening46, which is an entrance for the tab portion T.

As shown inFIG. 8, the first resilient contact piece51A is a leaf spring-like part continuous from the first curved portion44and extending toward the second side wall portion15. One end of this first resilient contact piece51A continuous from the first curved portion44serves as a base end portion52A, and the other end serves as a free end portion53A. The first resilient contact piece51A has such a chevron shape that a most part near the base end portion52A is gently separated from the bottom wall portion12with distance from the base end portion52A and a remaining part near the free end portion53A approaches the bottom wall portion12toward the free end portion53A. A tip part of the chevron shape serves as a contact portion54A to be brought into contact with the tab portion T. The first resilient contact piece51A includes two dividing slits55A,55A extending from the free end portion53A toward the base end portion52A, and is divided into three spring pieces56A,56A,56A by these dividing slits55A,55A.

The second resilient contact piece51B is a leaf spring-like part continuous from the second curved portion45and extending toward the second side wall portion15. Since the second resilient contact piece51B is shaped similarly to the first resilient contact piece51A, the same components are denoted by the same reference signs with a suffix A for the first resilient contact piece51A replaced by a suffix B, and not described. The first and second resilient contact pieces51A,51B are arranged to be convex to each other (see alsoFIG. 12), and the tab portion T can be sandwiched and held by the contact portions54A,54B. In a free state where the tab portion T is not inserted in the rectangular tube portion41and no load is applied to the two resilient contact pieces51A,51B, a distance between a pair of the contact portions54A,54B is smaller than a thickness of the tab portion T.

In connecting the male terminal fitting and the female terminal fitting40, the tab portion T is caused to enter the rectangular tube portion41through the insertion opening46(in a direction indicated by an arrow inFIG. 8) by being slid in parallel to the bottom wall portion12and the ceiling wall portion13. The tab portion T is inserted into between the two resilient contact pieces51A,51B and moves toward the second side wall portion15.

With the male terminal fitting inserted to a proper position (position shown inFIGS. 9 and 10) with respect to the female terminal fitting40, the tab portion T is in contact with the contact portions54A,54B as shown inFIG. 10. The first and second resilient contact pieces51A,51B are respectively deflected to approach the bottom wall portion12and the ceiling wall portion13. Then, the tab portion T is sandwiched between the contact portions54A,54B by resilient restoring forces from the resilient contact pieces51A,51B and held in contact with the resilient contact pieces51A,51B with a constant contact pressure. In this way, the female terminal fitting40and the male terminal fitting are electrically connected.

In separating the male terminal fitting from the female terminal fitting40, the tab portion T is withdrawn to the outside of the rectangular tube portion11through the withdrawal slit17(in a direction indicated by an arrow inFIG. 11) by being slid in parallel to the bottom wall portion12and the ceiling wall portion13.

As described above, according to this embodiment, the female terminal fitting40is a terminal fitting to be connected to the flat plate-like tab portion T of the male terminal fitting and includes the rectangular tube portion41having the pair of side wall portions (first and second side wall portions42,15) arranged to face each other and the bottom wall portion12and the ceiling wall portion13coupling the pair of side wall portions42,15and capable of accommodating the tab portion T inside, and the first and second resilient contact pieces51A,51B arranged inside the rectangular tube portion41. The first resilient contact piece51A is arranged along the bottom wall portion12and electrically connected to the bottom wall portion12and can resiliently contact the tab portion T accommodated inside the rectangular tube portion41. The second resilient contact piece51B is arranged along the ceiling wall portion13and electrically connected to the ceiling wall portion13and can resiliently contact the tab portion T accommodated inside the rectangular tube portion41. The first side wall portion42includes the insertion slit16through which the tab portion T is inserted into the rectangular tube portion41, and the second side wall portion15includes the withdrawal slit17through which the tab portion T is withdrawn from the rectangular tube portion41.

According to the above configuration, as in the first embodiment, the tab portion T may be inserted into the rectangular tube portion41though the insertion slit16by being slid in parallel to the bottom wall portion12and the ceiling wall portion13in connecting the male terminal fitting to the female terminal fitting40. Further, in separating the male terminal fitting from the female terminal fitting40, the tab portion T may be withdrawn from the rectangular tube portion41though the withdrawal slit17by being similarly slid in parallel to the bottom wall portion12and the ceiling wall portion13. Since the tab portion T can be easily inserted into and withdrawn from the female terminal fitting40by being slid in this way, a workload can be reduced also when a worker has to perform an operation in a somewhat uncomfortable posture such as when the worker gets under a vehicle body to perform an operation.

Further, the rectangular tube portion41includes the bottom wall portion12and the ceiling wall portion13arranged to face each other and the first and second resilient contact pieces51A,51B.

According to this configuration, if the tab portion T is inserted into the female terminal fitting40, the tab portion T is sandwiched by the first and second resilient contact pieces51A,51B. In this way, the resilient contact pieces51A,51B can be brought into contact with the tab portion T with a constant contact pressure and the reliability of electrical connection of the female terminal fitting40and the male terminal fitting can be enhanced.

Other Embodiments

The technique disclosed by this specification is not limited to the above described and illustrated embodiments. For example, the following various modes are also included.

(1) The female terminal fitting1includes the bottom wall portion12, the ceiling wall portion13and the first and second obliquely wound coil springs20A,20B in the above first embodiment, and the female terminal fitting40includes the bottom wall portion12, the ceiling wall portion13and the first and second resilient contact pieces51A,51B in the above second embodiment. However, a body portion may include one coupling wall portion (coupling wall) and a contact portion (contact) arranged along the coupling wall portion may contact only one surface of a mating terminal.

(2) Although the female terminal fitting1includes two first obliquely wound coil springs20A arranged along the bottom wall portion12in the above first embodiment, one, three or more first obliquely wound coil springs20A may be arranged. The same holds true also for the second obliquely wound coil springs.

(3) The body portion may include a rotation restricting portion for restricting the rotation of obliquely wound coil springs about coil axes.