Patent Publication Number: US-2009229388-A1

Title: Cable connecting apparatus of controller for air conditoner in vehicle

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a cable connecting apparatus of a controller for an air conditioner in a vehicle, and more particularly, to a cable connecting apparatus of a controller for an air conditioner in a vehicle, which can connect a cable to actuating means of the controller and actuating means of an air-conditioning case to actuate a door, wherein the cable connecting apparatus includes bending preventing means mounted thereon for connecting an end portion of the cable with the actuating means, thereby enhancing durability and a manipulation feeling, minimizing abrasion of components, using the cable as a flexible cable without any restriction in route of the cable and without bending of the cable, and reducing a manufacturing cost since the connecting apparatuses respectively mounted on the air-conditioning case and on the controller have the same structure. 
     2. Background Art 
     In general, an air conditioner for vehicles is a car interior component, which is installed in the vehicle heat for the purpose of cooling the inside of the vehicle in the summer season or the winter season or removing frost from a windshield in rainy season or winter season to thereby secure a driver&#39;s front and rear visual field. Since such an air conditioner typically includes a heating device and a cooling device together, so that it heats, cools or ventilates the inside of the vehicle through the steps of selectively introducing the indoor air or the outdoor air to the air conditioner through a blower unit, heating or cooling the introduced air, and blowing the heated or cooled air into the vehicle. 
     Such an air conditioner is classified into a three-piece type where a blower unit, an evaporator unit, and a heater core unit are disposed independently, a semi-center type where the evaporator unit and the heater core unit are embedded in an air-conditioning case and the blower unit is mounted separately, and a center-mounting type where the three units are all embedded in the air-conditioning case. 
       FIG. 1  illustrates the semi-center type air conditioner. In  FIG. 1 , the air conditioner  1  includes: an air-conditioning case  10  having an air inflow port  11  formed on an inlet thereof and a defrost vent  12   a,  a face vent  12   b  and a floor vent  12   c  mounted on an outlet thereof in such a way as to be adjusted in a degree of opening by mode doors  16 ; an evaporator  2  and a heater core  3  embedded in the air-conditioning case  10 ; and a temperature-adjusting door  15  mounted between the evaporator  2  and the heater core  3  for adjusting a degree of opening of a cold air passageway P 1  bypassing the heater core  3  and a warm air passageway P 2  passing through the heater core  3 . 
     Furthermore, the air-conditioning case  10  further includes a blower (not shown) mounted on the air inflow port  11  thereof for selectively introducing and sending inside air or outside air into the air-conditioning case  10  through an inside and outside air inlet (not shown) adjusted in a degree of opening by inside and outside air converting door (not shown). 
     According to the air-conditioner  1  for the vehicle configured as described above, in case of the greatest cooling mode, the temperature-adjusting door  15  opens the cold air passageway P 1  and closes the warm air passageway P 2 . Accordingly, the air blown by the blower (not shown) is converted into cold air by being heat-exchanged with refrigerant flowing inside the evaporator  2  while passing through the evaporator  2 , and then, flows toward a mixing chamber (MC) through the cold air passageway P 1 . After that, the converted air is discharged to the inside of a vehicle through the vents  12   a  to  12   c  opened by the mode doors  16  according to a predetermined air-conditioning mode, whereby the inside of the vehicle is cooled. 
     Moreover, in case of the greatest heating mode, the temperature-adjusting door  15  closes the cold air passageway P 1  and opens the warm air passageway P 2 . Accordingly, the air blown by the blower (not shown) passes through the evaporator  2 , is converted into warm air by being heat-exchanged with cooling water flowing inside the heater core  3  while passing through the heater core  3  through the warm air passageway P 2 , and then, flows toward the mixing chamber (MC). After that, the converted air is discharged to the inside of a vehicle through the vents  12   a  to  12   c  opened by the mode doors  16  according to the predetermined air-conditioning mode, whereby the inside of the vehicle is heated. 
     In the meantime, in case of not the greatest cooling mode but a half cooling mode, the temperature-adjusting door  15  is rotated to a neutral position, and opens the cold air passageway P 1  and the warm air passageway P 2  relative to the mixing chamber (MC). Accordingly, the cold air passing through the evaporator  2  and the warm air passing through the heater core  3  flow toward the mixing chamber (MC) and are mixed with each other, and then, are discharged to the inside of the vehicle through the vents  12   a  to  12   c  opened by the mode doors  16  according to the air-conditioning mode. 
     Additionally, the inside and outside air converting door (not shown), the temperature-adjusting door  15  and the mode doors  16  are respectively adjusted in their degree of opening by arms  28 , levers  25  and a cam  21  mounted on an outer face of the air-conditioning case  10 , and it will be described referring to  FIG. 2 . 
       FIG. 2  illustrates a state that the arms  28 , the levers  25  and the cam  21  for actuate the doors  16  are mounted on the outer face of the air-conditioning case  10 . In this instance, the cam  21 , the levers  25  and the arms  28  are rotatably joined to the outer face of the air-conditioning case  10 . 
     The cam  21  includes three slots  22 , and the number of the slots  22  may be increased and decreased according to the number of the doors  16 , which will be actuated. 
     The arms  28  are directly connected with rotary shafts of the doors  16  to transfer a rotational force to the doors  16 . 
     Furthermore, the levers  25  are respectively located between the cam  21  and each of the arms  28 , wherein one end portion of each of the levers  25  is slidably connected with the slot  22  through a pin  26  and the other end portion is rotatably connected with the arm  28 , whereby the levers  25  can transfer the rotational force receiving from the cam  21  to the arms  28 . 
     Moreover, the cam  21  is connected with switches  50   a  mounted on a controller  50  of the vehicle through a cable  23 . Here, the controller  50  includes a housing  51  and a plurality of switches  50   a  of various forms, namely, an air volume switch (not shown) for adjusting a speed of an air blast, a mode switch  50   a  for determining a discharge direction of air, a temperature adjusting switch (not shown) for adjusting an air temperature, and an air conditioner switch (not shown) for turning on and off the air conditioner. 
       FIG. 3  is a perspective view showing one example of the switch mounted on the controller of the vehicle. In  FIG. 3 , the switch  50   a  includes: a gear shaft  60  having one end rotatably supported on a boss  52  formed from the inner bottom face of the housing  51 ; a gear lever  70  rotatably mounted on a circumference of the boss  52  in such a way as to be gear-coupled to the gear shaft  60  and connected with the cam  21  of the air-conditioning case  10  through the cable  23 ; and a knob  80  joined to an end portion of the gear shaft  60  projecting outwardly from the housing  51 . The gear shaft  60  adopts a beveled tooth form and the gear lever  70  corresponding to the gear shaft  60  adopts an arced tooth form. 
     Accordingly, when a passenger rotates the knob  80  to operate the door, since the gear shaft  60  is rotated by the rotation of the knob  80  and the gear lever  70  gear-coupled with the gear shaft  60  is also rotated, the cable  23  connected with the gear lever  70  is moved back and forth. In this instance, when the cable  23  is moved back and forth, the cam  21  mounted on the air-conditioning case  10  is rotated. When the cam  21  is rotated, the lever  25  is rotated at a predetermined angle while a pin  26  of the lever  25  slides along the slot  22  of the cam  21 , and then, the arm  28  interlocked with the lever  25  rotates the door  16  to a wanted position. 
     In the meantime, the arms  28  may be directly and slidably joined to the slots  22  of the cam  21  without mounting the levers  25 . 
     Moreover, since the cable  23  has rigidity of a predetermined level or more, it can rotate the cam  21  mounted on the air-conditioning case  10  while moving back and forth when the gear lever  70  is rotated. 
     However, the above-mentioned prior art has a size beyond a predetermined diameter to have a predetermined rigidity in order to prevent that the cable cannot transfer power due to its transformation (bending) when the cable  23 , which connects the switch  50   a  of the controller  50  and the cam  21  of the air-conditioning case  10  with each other, is pulled. In addition, the prior art has a problem in that it is restricted in route of the cable  23  due to rigidity of the cable  23 . 
     Furthermore, the prior art has several problems in that it exerts influence on a manipulation force and a manipulation feeling of the switch  50   a  according to the route of the cable  23 , and in that it is difficult to design the air conditioner  1  and the controller  50  in consideration of the route of the cable  23  since the cable may be interfered with other components. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior arts, and it is an object of the present invention to provide a cable connecting apparatus of a controller for an air conditioner in a vehicle, which can connect a cable to actuating means of the controller and actuating means of an air-conditioning case to actuate a door, wherein the cable connecting apparatus includes bending preventing means mounted thereon for connecting an end portion of the cable with the actuating means, thereby enhancing durability and a manipulation feeling, minimizing abrasion of components, using the cable as a flexible cable without any restriction in route of the cable and without bending of the cable, and reducing a manufacturing cost since the connecting apparatuses respectively mounted on the air-conditioning case and on the controller have the same structure. 
     To accomplish the above object, according to the present invention, there is provided a cable connecting apparatus of a controller for an air conditioner in a vehicle comprising: a single cable for transferring a manipulation force of actuating means of the controller in the vehicle to actuating means of an air-conditioning case to thereby actuate doors mounted inside the air-conditioning case; a casing having a receiving portion formed therein in such a way that one end portion of the cable is inserted into the receiving portion at one side thereof; connecting means movably inserted into the receiving portion of the casing for connecting one end portion of the cable and the actuating means with each other; and bending preventing means disposed on the connecting means to prevent the cable inserted into the receiving portion from bending by the manipulation force so that the manipulation force can be transferred between the actuating means. 
     The cable connecting apparatus of the controller for the air conditioner in the vehicle according to the present invention, which can connect a cable to actuating means of the controller and actuating means of an air-conditioning case to actuate a door, includes bending preventing means mounted thereon for connecting an end portion of the cable with the actuating means, whereby the cable connecting apparatus can enhance durability and a manipulation feeling, minimize abrasion of components, use the cable as a flexible cable without any restriction in route of the cable and without bending of the cable, and reduce a manufacturing cost since a diameter of the cable can be reduced greatly. 
     Since there is no restriction in route of the cable, there is no need to consider the route of the cable when the air conditioner and the controller are designed, and hence, there is no restriction in design. 
     Furthermore, the present invention can reduce the manufacturing cost since the connecting means respectively mounted on the air-conditioning case and on the controller have the same structure. 
     Moreover, the cable connecting apparatus according to the present invention occupies a small assembly space since a case of the connecting means is formed in a round form. 
     Additionally, a pulley has a detent recess formed on one side thereof in such a way that a detent projection mounted inside the casing is elastically caught to the detent recess, and in this instance, the detent recess is formed left-right asymmetrically, namely, one of right and left sides of the detent recess has a curved face having a radius larger than that of the other side thereof or has an inclined face having an angle smaller than that of the other side thereof, whereby the present invention can provide the same manipulation feeling and force when the passenger rotates a knob in the direction to push the cable and in the direction to pull the cable to thereby enhance the manipulation feeling. 
     In addition, since a support guide made of an elastic material closely supports the cable while moving together with the cable drawn out from a tube, the present invention can use the cable as a flexible cable without any restriction in route of the cable and remove a loss of the cable while using the flexible cable by preventing that the cable is bent. 
     Furthermore, since a boss portion or a roller is formed at a portion, where a sliding groove and a receiving portion are connected with each other, the support guide takes a U-turn along the outer circumferential surface of the boss portion or the roller and closely supports the cable, whereby the support guide can be prevented from a tangle. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a sectional view of an air conditioner in a vehicle according to a prior art; 
         FIG. 2  is a side view showing a stat where arms, levers and a cam are mounted on an outer face of an air-conditioning case to actuate a door in the air conditioner according to the prior art; 
         FIG. 3  is a perspective view showing one example of a switch mounted on a controller in the vehicle according to the prior art; 
         FIG. 4  is a side view showing a state where a cable connecting apparatus of a controller for an air conditioner in a vehicle according to a first preferred embodiment of the present invention is installed on an air-conditioning case; 
         FIG. 5  is a perspective view showing a state where the cable connecting apparatus according to the first preferred embodiment of the present invention is installed on the air-conditioning case and the controller; 
         FIG. 6  is a sectional view taken along the line of A-A of  FIG. 5 ; 
         FIG. 7  is an exploded perspective view of the cable connecting apparatus according to the first preferred embodiment of the present invention; 
         FIGS. 8 and 9  are views showing a state where a pulley pulls or winds a cable in the cable connecting apparatus according to the first preferred embodiment of the present invention; 
         FIG. 10  is a perspective view showing a state where a cable connecting apparatus of a controller for an air conditioner in a vehicle according to a second preferred embodiment of the present invention is installed on an air-conditioning case and a controller; 
         FIG. 11  is a sectional view taken along the line of B-B of  FIG. 10 ; 
         FIG. 12  is an exploded perspective view of the cable connecting apparatus according to the second preferred embodiment of the present invention; 
         FIGS. 13 and 14  are views showing a state where a pulley is rotated in a direction to push or pull a cable in the cable connecting apparatus according to the second preferred embodiment of the present invention; 
         FIGS. 15 and 16  are views showing modifications of a detent recess in the cable connecting apparatus according to the second preferred embodiment of the present invention; 
         FIG. 17  is a perspective view showing a state where a cable connecting apparatus of a controller for an air conditioner in a vehicle according to a third preferred embodiment of the present invention is installed on an air-conditioning case and a controller; 
         FIG. 18  is a sectional view taken along the line of C-C of  FIG. 17 ; 
         FIG. 19  is an exploded perspective view of the cable connecting apparatus according to the third preferred embodiment of the present invention; 
         FIGS. 20 and 21  are views showing a state where a pulley pulls or winds a cable in the cable connecting apparatus according to the third preferred embodiment of the present invention; 
         FIGS. 22 and 23  are views showing a state where a boss portion is substituted with a roller in the cable connecting apparatus according to the third preferred embodiment; 
         FIG. 24  is a perspective view showing a state where a cable connecting apparatus of a controller for an air conditioner in a vehicle according to a fourth preferred embodiment of the present invention is installed on an air-conditioning case and a controller; 
         FIG. 25  is an exploded perspective view of the cable connecting apparatus according to the fourth preferred embodiment of the present invention; 
         FIGS. 26 and 27  are views showing a state where a slide bar pushes and pulls the cable in the cable connecting apparatus according to the fourth preferred embodiment of the present invention; and 
         FIGS. 28 and 29  are views showing a state where a boss portion is substituted with a roller in the cable connecting apparatus according to the fourth preferred embodiment. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Reference will be now made in detail to the preferred embodiment of the present invention with reference to the attached drawings. 
     The same parts as the prior art have the same reference numerals as the prior art. 
       FIG. 4  is a side view showing a state where a cable connecting apparatus of a controller for an air conditioner in a vehicle according to a first preferred embodiment of the present invention is installed on an air-conditioning case,  FIG. 5  is a perspective view showing a state where the cable connecting apparatus according to the first preferred embodiment of the present invention is installed on the air-conditioning case and the controller,  FIG. 6  is a sectional view taken along the line of A-A of  FIG. 5 ,  FIG. 7  is an exploded perspective view of the cable connecting apparatus according to the first preferred embodiment of the present invention, and  FIGS. 8 and 9  are views showing a state where a pulley pulls or winds a cable in the cable connecting apparatus according to the first preferred embodiment of the present invention. 
     First, the cable connecting apparatus  100  of the controller for the air conditioner in the vehicle according to a first preferred embodiment of the present invention is applicable to various air conditioners of a center-mounting type, a semi-center type, a three-piece type, and so on. 
     Here, referring to  FIG. 1 , the air conditioner will be described in brief. The air conditioner includes: an air-conditioning case  10  having an air inflow port  11  formed on an inlet thereof, a plurality of vents  12   a  to  12   c  formed on an outlet thereof, and a cold air passageway P 1  and a warm air passageway P 2  formed on an inner air passageway thereof; an evaporator  2  and a heater core  3  mounted on the inner air passageway of the air-conditioning case  10 ; a temperature-adjusting door  15  mounted between the evaporator  2  and the heater core  3  for adjusting a degree of opening of a cold air passageway P 1  bypassing the heater core  3  and a warm air passageway P 2  passing through the heater core  3 ; and a plurality of mode doors  16  respectively mounted on the vents  12   a  to  12   c  for adjusting a degree of opening of the vents  12   a  to  12   c.    
     Furthermore, the air-conditioning case  10  further includes a blower (not shown) mounted on the air inflow port  11  thereof for sending the inside air or the outside air. 
     In addition, a plurality of the vents  12   a  to  12   c  are a defrost vent  12   a  for discharging air toward the front window of the vehicle, a face vent  12   b  for discharging air toward the face of a passenger, who seats on the front seat, and a floor vent  12   c  for discharging air toward the passenger&#39;s feet. 
     In the meantime, the vents  12   a  to  12   c  are respectively connected with specific discharge holes formed inside the vehicle through ducts (not shown). 
     Furthermore, as shown in  FIG. 4 , the temperature-adjusting door  15  and the mode doors  16  are adjusted in a degree of opening by arms  28 , levers  25  and a cam  21  mounted on an outer face of the air-conditioning case  10 , and hereinafter, only a case that the mode doors  16  are controlled through the arms  28 , the levers  25  and the cam  21  will be described. Of course, a control of the temperature-adjusting door  15  is the same as the mode doors  16 . 
     The cam  21  is rotatably joined to the outer face of the air-conditioning case  10 , and has three slots  22  formed on a circumference thereof. The number of the slots  22  may be increased and decreased according to the number of doors  16 , which will be actuated. 
     In this instance, the air-conditioning case  10  includes a projection  10   a  formed on the outer face thereof, and the cam  21  includes an insertion hole  23   a  formed on one side thereof in such a way that the projection  10   a  is rotatably inserted and joined thereto. Moreover, the cam  21  further includes a joining hole  23   b  formed on the other side thereof in such a way that a rotary shaft  121  of a pulley  120  of connecting means  105 , which will be described later, is joined thereto. 
     The arms  28  are mounted on the outer face of the air-conditioning case  10 , and directly connected with rotary shafts of the doors  16  to thereby be rotated together with the doors  16 . 
     In addition, the levers  25  are located between the cam  21  and each of the arms  28 , and rotatably joined to the outer face of the air-conditioning case  10 . Each of the levers  25  has one end portion slidably joined with each of the slots  22  and the other end portion rotatably joined with each of the arms  28  to thereby transfer a rotational force receiving from the cam  21  to the arms  28 . 
     In the meantime, the arms  28  may be directly and slidably joined to the slots  22  of the cam  21  without mounting the levers  25 . 
     Furthermore, a controller  50  is mounted on a center fascia panel of the vehicle in order to control the air conditioner. The controller  50  has a structure that a plurality of switches  50   a  are mounted on a housing  51  of a predetermined form. That is, an air volume switch (not shown) for adjusting a speed of an air blast, a mode switch  50   a  for determining a discharge direction of air, a temperature adjusting switch (not shown) for adjusting an air temperature, an air conditioner switch (not shown) for turning on and off the air conditioner, and so on may be mounted on the housing  51 . 
       FIG. 5  illustrates an example that the mode switch  50   a  is mounted on the housing  51 . 
     The switch  50   a  is constructed in such a way that a knob  80  is rotatably mounted on the front side of the housing  51  and the cable connecting apparatus  100  is installed on the rear side of the housing  51  to actuate a cable  130  when the knob  80  is rotated. That is, in the present invention, the cable connecting apparatus  100 , which is mounted on one end portion of the cable  130 , and the knob  80  constitute the switch  50   a.    
     The knob  80  includes a joining portion  81 , which will be joined with the rotary shaft  121  of the pulley  120  of the cable connecting apparatus  100 . 
     In the meantime, the rotary shaft  121  of the pulley  120  may be directly joined to the joining portion  81  of the knob  80  or indirectly joined to the joining portion  81  of the knob  80  through a separate connector (not shown). 
     Moreover, the cable connecting apparatus  100  of the controller for the air conditioner according to the present invention is an apparatus for connecting end portions of the single cable  130  to actuating means  101  of the controller  50  and actuating means  102  of the air-conditioning case  10  to thereby actuate the doors  16  mounted inside the air-conditioning case  10 . 
     While the actuating means  101  of the controller  50  is mounted on the controller  50  in such a way as to be interlocked with the switch  50   a,  the actuating means  102  of the air-conditioning case  10  is mounted on the outer face of the air-conditioning case  10  in such a way as to be interlocked with the doors  16  mounted inside the air-conditioning case  10 . 
     Additionally, the cable  130  is mounted in such a way as to connect the actuating means  101  of the controller  50  and the actuating means  102  of the air-conditioning case  10  with each other, and is wrapped with a tube  131 . 
     Here, it is preferable that the actuating means  101  of the controller  50  is the knob  80  of the switch  50   a  and the actuating means  102  of the air-conditioning case  10  is the cam  21 , which is interlocked with the doors  16  mounted inside the air-conditioning case  10 . Of course, the actuating means  102  of the air-conditioning case  10  may be the arms  28  or the levers  25  interlocked with the doors  16 . 
     Furthermore, it is preferable that the cable  130  is a flexible cable  130 , which can be freely curved or bent. Accordingly, there is no restriction in route of the cable  130  and in design of the air conditioner  1  and the controller  50  since there is no need to design the air conditioner  1  and the controller  50  in consideration of the route of the cable  130 . 
     Moreover, the cable  130  is mounted in such a way as to slide along the inside of the tube  131 , and can be decreased in quantity since only one strand of the cable  130  is used. 
     The cable connecting apparatus  100  includes: a casing  110  having a receiving portion  111  formed therein in such a way that one end portion of the cable  130  is inserted into the receiving portion  111  at one side thereof; connecting means  105  movable inserted into the receiving portion  111  of the casing  110  for connecting the end portion of the cable  130  and the actuating means  101  and  102  with each other; and bending preventing means  140  disposed on the connecting means  105  for preventing bending of the cable  130  inserted into the receiving portion  111 . 
     The connecting means  105  is the pulley  120  rotatably inserted and mounted into the receiving portion  111  formed circularly inside the casing  110 . The end portion of the cable  130  is joined to the outer circumferential surface of the pulley  120  in such a way as to be circumscribed with the pulley  120 , and the pulley  120  has the rotary shaft  121  formed on the center of one side thereof in such a way as to be joined with the actuating means  101  and  102 . 
     The casing  110  includes: a first casing  110   a  having the receiving portion  111 ; and a second casing  110   b  joined with the first casing  110   a  for covering the receiving portion  111 . Accordingly, when the second casing  110   b  is joined with the first casing  110   a  in a state where the pulley  120  is received in the receiving portion  111  of the first casing  110   a,  the pulley  120  is not separated from the cable connecting apparatus  100 . 
     In addition, the first casing  110   a  and the second casing  110   b  may be joined with each other via a bolt (not shown), or via a retaining jaw (not shown) formed on the outer circumferential face of the first casing  110   a  and an elastically joined portion (not shown) formed on the outer circumferential face of the second casing  110   b  in such a way as to be elastically joined to the retaining jaw (not shown). 
     Furthermore, the receiving portion  111  is in a round form, and includes a retaining portion  111   a  formed on one side thereof for preventing a separation of the pulley  120  inserted into the receiving portion  111 . 
     The casing  110  having the receiving portion  11  may be constructed of one of various forms, such as a structure shown in  FIG. 7  or a structure shown in  FIG. 12 . The structure of the casing  110  shown in  FIG. 7  is described above, and the structure of the casing  110  shown in  FIG. 12  will be described now. Referring to  FIG. 12 , the first casing  110   a  has a central shaft  111   b  protrudingly formed at the center of the receiving portion  111 , and the pulley  120  has a joining hole  126  formed at the center of one side thereof correspondingly to the central shaft  111   b  in such a way as to be rotatably joined to the central shaft  111   b.  Accordingly, the pulley  120  can be rotated smoothly since it is supported by the central shaft  111   b  inside the receiving portion  111 . 
     In the meantime, the above-mentioned structure of the casing  110  is only one example, and the structure of the casing  110  may be modified in various ways. That is, the receiving portion  111  may be formed in the second casing  110   b,  and a mounting direction of the rotary shaft  121  of the pulley  120  to insert the pulley  120  into the receiving portion  111  of the casing  110  may be varied in various ways. 
     Moreover, a tube joining portion  112  is formed on one side of the casing  110 , to which one end portion of the cable  130  is inserted, in such a way that one end portion of the tube  131  wrapping the cable  130  can be fixed thereto. 
     In addition, a cable support groove  113  is formed between the tube joining portion  112  and the receiving portion  111  for supporting a portion of the cable  130  drawn out from the tube  131 . The cable support groove  113  supports the cable  130  located between the tube  131  and the pulley  120 . 
     In the meantime, the casing  110  is in the round form to thereby reduce an assembly space. 
     Additionally, since the cable  130  is circumscribed with the outer circumferential surface of the pulley  120 , it makes easy to transfer power of the cable  130  and minimizes abrasion between the casing  110  and the pulley  120 . Here, the cable  130  is mounted in a tangential direction on the outer circumferential surface of the pulley  120 . 
     Furthermore, the bending preventing means  140  is constructed of a cable groove  122  with a non-circular section and the cable  130  with a circular section to minimize a contact resistance to the cable  130  when the cable  130  is wound on the outer circumferential surface of the pulley  120 . 
     That is, the cable groove  122  with a non-circular section supports the cable  130  in such a way as to guarantee a smooth winding of the cable  130  and prevent bending of the cable  130  when the cable is wound or released. Particularly, during a process that the cable  130  is wound on or released from the cable groove  122  with a non-circular section, when a compression force is applied to the cable  130 , the cable groove  122  prevents bending of the cable  130  with a circular section, namely, a loss of the cable. 
     Moreover, the rotary shaft  121  protrudingly formed from the center of the one side of the pulley  120  is formed in such a way as to protrude outwardly from the casing  110 . 
     Additionally, the rotary shaft  121  has a convex portion  121   a  formed on the outer circumferential surface thereof to prevent a sliding when it is joined with the actuating means  101  and  102 . In this instance, the knob  80 , which is the actuating means  101  of the controller, has a concave portion  82  formed on the inner circumferential surface of the joining portion  81  in such a way as to be joined with the convex portion  121   a  of the rotary shaft  121 , and also the cam  21 , which is the actuating means  102  of the air-conditioning case, has a concave portion  23   b  formed on one side thereof in such a way as to be joined with the convex portion  121   a  of the rotary shaft  121 . 
     In addition, the cable  130  is formed circularly in a cross section, and in this instance, it is preferable that the cable groove  122  is formed in a rectangular shape. Accordingly, since the cable  130  and the cable groove  122  are in a dot contact with each other, a contact resistance between the cable  130  and the cable groove  122  is minimized, durability is enhanced, and a manipulation feeling of the knob  80  is also enhanced when the passenger manipulates the knob  80  of the controller  50 . 
     Furthermore, a gap (G) of a predetermined interval is formed between the inner circumferential surface of the receiving portion  111  of the casing  110  and the outer circumferential surface of the pulley  120 . That is, since the one side of the cable  130  is supported by the inner circumferential surface of the receiving portion  111  when the cable  130  is wound on or released from the cable groove  122  of the pulley  120 , if the gap (G) formed between the inner circumferential surface of the receiving portion  111  and the outer circumferential surface of the pulley  120  is adjusted, it can minimize a friction force between the cable  130  and the receiving portion  111 , secure a good manipulation feeling, and remove the loss of the cable. 
     In this instance, it is preferable that a depth (D) of the cable groove  122  is the same as a diameter size of the cable  130  and a width (W) of the cable groove  122  is larger than the diameter of the cable  130 . 
     In the meantime, the gap (G) formed between the inner circumferential surface of the receiving portion  111  and the outer circumferential surface of the pulley  120  is properly adjusted within a range that the loss of the cable does not occur. 
     As described above, when the gap around the cable  130  is adjusted, the loss of the cable occurring when the cable  130  is bent can be removed while the cable  130  is wound on or released from the cable groove  122  of the pulley  120 . 
     Moreover, the cable groove  122  includes chamfered portions  122   a  formed at both sides of an opening portion thereof to thereby allow a smooth entry of the cable  130 . 
     In the meantime, the pulley  120  has a fixing slot  123  communicating with the cable groove  122  in such a way that a fixing cap  130   a  joined to an end portion of the cable  130  is inserted and fixed thereto. 
     Additionally, in case of the cable connecting apparatus  100  installed on the air-conditioning case  10 , it is preferable that the casing  110  further includes brackets  117  in such a way as to be fixed and joined to the outer face of the air-conditioning case  10  and the rotary shaft  121  of the pulley  120  is located at the rotational center of the cam  21 , which is the actuating means  102  of the air-conditioning case  10 . 
     In this instance, the air-conditioning case  10  further includes a plurality of boss portions  10   b  of a predetermined height formed on the outer face thereof in such a way that the brackets  117  can be joined thereto via bolts. Here, the cam  21  further includes slots  24  for preventing interference with the boss portions  10   b,  and the slots  24  are larger than a radius of working of the cam  21 . 
     In addition, in case of the cable connecting apparatus  100  installed on the controller  50 , it is preferable that the casing  110  is fixed to the rear side of the housing  51  of the controller  50  and the rotary shaft  121  of the pulley  120  is located at the rotational center of the knob  80 , which is the actuating means  101  of the controller  50 . 
     As described above, when the switch  50   a  of the controller  50  and the cam  21  of the air-conditioning case  10  are connected with each other via the cable  130 , the cable connecting apparatuses  100  are respectively installed at both end portions of the cable  130 . 
     Accordingly, when the cable  130  drawn out from the tube  131  is wound on or released from the outer circumferential surface of the pulley  120 , the cable  130  is in a point contact state inside the rectangular cable groove  122  formed on the outer circumferential surface of the pulley  120 , and at the same time, the receiving portion  111  of the casing  110  wrapping the pulley  120  supports one side of the cable  130 , so that the cable  130  is used as the flexible cable  130  without any restriction in route of the cable  130  and it is prevented that the cable  130  is bent when the cable  130  is wound (pulled) or released (pushed) on the pulley  120 , whereby the loss of the flexible cable  130  can be removed. 
     Furthermore, since the cable  130  is in point contact with the cable groove  122  of the pulley  120  to thereby minimize a contact resistance, it enhances durability and a manipulation feeling of the switch  5   a  of the controller  50 . 
     Moreover, since the cable connecting apparatuses installed on the air-conditioning case  10  and the controller  50  have the same structure, a manufacturing cost can be reduced. 
       FIGS. 10 to 16  illustrate a cable connecting apparatus of a controller for an air conditioner in a vehicle according to a second preferred embodiment of the present invention, wherein a detent structure is mounted on the cable connecting apparatus  100 . That is,  FIG. 10  is a perspective view showing a state where the cable connecting apparatus is installed on the air-conditioning case and the controller,  FIG. 11  is a sectional view taken along the line of B-B of  FIG. 10 ,  FIG. 12  is an exploded perspective view of the cable connecting apparatus,  FIGS. 13 and 14  are views showing a state where the pulley is rotated in a direction to push or pull a cable, and  FIGS. 15 and 16  are views showing modifications of a detent recess in the cable connecting apparatus. 
     As shown in the drawings, the detent structure is mounted between the casing  110  and the pulley  120  in such a way that the passenger can feel a suspension sense every specific rotational position when the passenger rotates the knob  80  of the controller  50 , so that the passenger can easily manipulate the knob  80 . 
     That is, the casing  110  includes a detent projection  115  elastically mounted inside the casing  110  through an elastic member  115   a,  and the pulley  120  includes a detent portion  124  protrudingly formed on one side thereof and having a plurality of detent recesses  125  circumferentially formed on an outer face thereof in such a way that the detent projection  115  is elastically caught to one of the detent recesses  125 . 
     In the drawings, the detent portion  124  is formed integrally with the rotary shaft  121  on one side of the pulley  120 . 
     Here, in order to mount the detent projection  115  inside the casing  110 , the casing  110  includes a receiving hole  116  formed on an inner face of the second casing  110   b  and opened in the inward direction. Accordingly, after the elastic member  115   a  is interposed into the receiving hole  116 , the detent projection  115  is elastically mounted. 
     In this instance, an end portion of the detent projection  115  is in a curved form. 
     In the meantime, when the knob  80  of the controller  50  is rotated and the pulley  120  is rotated in a direction to pull the cable  130 , since the cable  130  is not bent even though it is the flexible cable, there is no loss of cable. However, at least a little loss of the cable occurs due to the property of the flexible cable  130  when the pulley  120  is rotated in a direction to push the cable  130 , and hence, a load is increased and the manipulation feeling gets heavy as much as the loss. 
     When the passenger manipulates and rotates the knob  80  of the controller  50 , there is a difference in manipulation force between a case that the passenger rotates the knob  80  in the direction to push the cable  130  and a case that the passenger rotates the knob  80  in the direction to pull the cable  130 . 
     Accordingly, in order to provide the same manipulation feeling and manipulation force without regard to the rotational direction of the knob  80 , the present invention achieved it through a change in shape of the detent recesses  125  without adding additional components or changing the structure of the apparatus. 
     That is, as a plan to provide the same manipulation feeling and manipulation force without regard to the rotational direction of the knob  80 , each of the detent recesses  125  is formed left-right asymmetrically in the direction to pull the cable  130  and in the direction to push the cable  130 . 
     In order to form the detent recess  125  left-right asymmetrically, as shown in  FIG. 15 , out of left and right sides  125   a  and  125   b  of the detent recess  125 , one side  125   a,  to which the detent projection  115  is caught when the pulley  120  is rotated in the direction to push the cable  130 , has a curved face having a radius (R 1 ) larger than a radius (R 2 ) of the other side  125   b.    
     As another modification, as shown in  FIG. 16 , out of the left and right sides  125   a  and  125   b  of the detent recess  125 , one side  125   a,  to which the detent projection  115  is caught when the pulley  120  is rotated in the direction to push the cable  130 , has an inclined face having an angle (θ 1 ) smaller than an angle (θ 2 ) of the other side  125   b.    
     As described above, in order to compensate an increase of the load and the manipulation force due to the loss of the cable occurring when the pulley  120  is rotated in the direction to push the cable  130 , one  125   a  out of the left and right sides  125   a  and  125   b  of the detent recess  125  has the curved face having the radius (R 1 ) larger than that of the other side  125   b  or the inclined face having the angle smaller than that of the other side  125   b,  so that the pulley  120  can be rotated even by a small manipulation force when the cable  130  is pushed, whereby the present invention can provide the same manipulation feeling and force when the passenger rotates the knob  80  in the direction to push the cable  130  and when the passenger rotates the knob  80  in the direction to pull the cable  130  to thereby enhance the manipulation feeling. 
     In the meantime, when the pulley  120  is rotated in the direction to pull the cable  130 , the detent projection  115  is caught to the curved face having the smaller radius (R 2 ) or the inclined face having the larger angle (θ 2 ), and hence, a moderation feeling is emphasized. 
     Furthermore, as another plan to provide the same manipulation feeling and manipulation force without regard to the shape of the detent recess  125 , while the detent recess  125  is formed left-right symmetrically, the outward appearance of the detent projection  115 , which is in correspondence with the detent recess  125 , is formed left-right asymmetrically in the direction to pull the cable  130  and in the direction to push the cable  130 , whereby the present invention can obtain the same effect as the above plan. 
     That is, the detent projection  115  may have the right and left sides of the asymmetrically curved face or the asymmetrically inclined face in such a way as to be left-right asymmetric in the direction to pull the cable  130  and in the direction to push the cable  130 . 
     Hereinafter, an action of the cable connecting apparatus of the controller for the air conditioner in the vehicle according to the present invention will be described. 
     First, when the passenger rotates the knob  80  of the controller  50 , the pulley  120  of the connecting apparatus  100  mounted on the controller  50  connected with the knob  80  is also rotated. 
     The pulley  120  is rotated inside the pulley receiving portion  111  of the casing  110  in interlock with the knob  80 . 
     In this instance, when the pulley  120  mounted on the connecting apparatus  100  of the controller  50  is rotated, the pulley  120  mounted on the connecting apparatus  100  of the air-conditioning case  10  connected through the cable  130  is also rotated in interlock with the pulley  120  of the controller  50 . 
     That is, when one end portion of the cable  130  is wound onto the pulley  120  of the connecting apparatus  100  mounted on the controller  50  to pull the cable  130 , the other end portion of the cable  130  is released from the pulley  120  while pulling the pulley  120  of the connecting apparatus  100  mounted on the air-conditioning case  10  in the rotational direction. 
     On the contrary, when one end portion of the cable is released from the pulley  120  of the connecting apparatus  100  mounted on the controller  50  to push the cable  130 , the other end portion of the cable  130  pushes the pulley  120  of the connecting apparatus  100  mounted on the air-conditioning case  10  in the rotational direction to thereby be wound on the pulley  120 . 
     Continuously, when the pulley  120  of the connecting apparatus  100  mounted on the air-conditioning case  10  is rotated, the cam  21  of the air-conditioning case  10  connected and joined to the rotary shaft  121  of the pulley  120  is rotated. When the cam  21  is rotated, the levers  25  are rotated at a predetermined angle while pins  26  of the levers  25  slide along the slots  22  of the cam  21 , whereby the arms  28  interlocked with the levers  25  actuate the doors  16 . 
     Moreover, when the pulley  120  is rotated inside the receiving portion  111  of the casing  110  to wind (pull) or release (push) the end portion of the cable  130 , since the receiving portion  111  of the casing  110  wrapping the pulley  120  supports one side of the cable  130  drawn out from the tube  131 , it can prevent that the cable  130  is bent. 
     Additionally, when the passenger rotates the knob  80 , the plural detent recesses  125  of the pulley  120  are elastically caught to the detent projection  115 , and hence, the passenger has the moderation feeling every specific position (every air-conditioning mode zone) when he or she manipulate the knob  80 , whereby the passenger can easily manipulate the air-conditioning mode. 
       FIGS. 17 to 23  illustrate a cable connecting apparatus of a controller for an air conditioner in a vehicle according to a third preferred embodiment of the present invention, wherein the bending preventing means  140  of the cable connecting apparatus  100  is changed. That is,  FIG. 17  is a perspective view showing a state where the cable connecting apparatus is installed on the air-conditioning case and the controller,  FIG. 18  is a sectional view taken along the line of C-C of  FIG. 17 ,  FIG. 19  is an exploded perspective view of the cable connecting apparatus,  FIGS. 20 and 21  are views showing a state where the pulley pulls or winds the cable, and  FIGS. 22 and 23  are views showing a state where a boss portion is substituted with a roller. 
     As shown in the drawings, the bending preventing means  140  includes supporting means  140   a  for closely supporting the cable  130  drawn out from the tube  131  while moving along the cable  130  when the cable  130  is wound on or released from the pulley  120 . 
     The supporting means  140   a  includes: a sliding groove  142  formed adjacent to the circumference of the receiving portion  111  inside the casing  110 , one end portion of the sliding groove  142  communicating with the receiving portion  111 ; and a support guide  141  made of an elastic material and slidably inserted into the sliding groove  142 , one end portion of the support guide  141  being fixed to the outer circumferential surface of the pulley  120  so that the support guide  141  closely supports the cable  130  while being wound on or released from the outer circumferential surface of the pulley  120  together with the cable  130  when the pulley  120  is rotated. 
     In addition, it is preferable that one end portion of the support guide  141  is fixed to the inside of the cable groove  122  formed on the outer circumferential surface of the pulley  120 , but the end portion of the support guide  141  may be formed integrally with the outer circumferential surface of the pulley  120 . Here, the end portion of the support guide  141  is fixed adjacent to a portion of the outer circumferential face of the pulley  120 , to which the end portion of the cable  130  is joined. 
     In the meantime, the support guide  141  is interposed between the cable  130  wound on the cable groove  122  of the pulley  120  and the receiving portion  111  to closely support the cable  130 . 
     Furthermore, a boss portion  145  as a pivot means  147  is formed at a portion, where the sliding groove  142  and the receiving portion  111  are connected with each other, to reduce a radius of the sliding groove  142  and make the support guide  141  take a U-turn and be wound on the pulley  120 , whereby the support guide  141  is prevented from a tangle. 
     Moreover, the support guide  141  is mounted in such a way as to slide in the opposite direction to the rotational direction of the pulley  120  inside the sliding groove  142 . That is, the end portion of the support guide  141  takes the U-turn on the outer circumferential surface of the boss portion  145  and is fixed and joined to the outer circumferential surface of the pulley  120 , and hence, the support guide  141  inserted into the sliding groove  142  slides in the opposite direction to the rotational direction of the pulley  120 . 
     Additionally, when the pulley  120  is rotated, since the support guide  141  is wound on or released from the outer circumferential surface of the pulley  120  while taking the U-turn along the outer circumferential surface of the boss portion  145 , the support guide  141  can be prevented from the tangle. 
     In the meantime, the present invention can reduce the manufacturing cost since the support guide  141  made of the elastic material can support the cable  130  by using only one string. 
     In addition, as another preferred embodiment of the pivot means  147 , as shown in  FIGS. 22 and 23 , a roller  146  is formed at a portion, where the sliding groove  142  and the receiving portion  111  are connected with each other, to make the support guide  141  take a U-turn and be wound on the pulley  120 , whereby the support guide  141  is prevented from a tangle. 
     That is, the roller  146  is mounted in place of the boss portion  145  to serve as the boss portion  145 . In this instance, if the roller  146  is mounted, when the pulley  120  is rotated, the support guide  141  rotates the roller  146  and takes the U-turn along the outer circumferential surface of the roller  146  to be wound on or released from the outer circumferential surface of the pulley  120 , and hence, a friction can be minimized during the above process. 
     As described above, when the cable  130  drawn out from the tube  131  is wound on or released from the outer circumferential surface of the pulley  120 , since the support guide  141  made of the elastic material closely supports the cable  130  while being wound on or released from the pulley  120  together with the cable  130 , so that the cable  130  is used as the flexible cable  130  without any restriction in route of the cable  130  and it is prevented that the cable  130  is bent when the cable  130  is wound (pulled) on or released (pushed) from the pulley  120 , whereby the loss of the flexible cable  130  can be removed. 
       FIGS. 24 to 29  illustrate a cable connecting apparatus of a controller for an air conditioner in a vehicle according to a fourth preferred embodiment of the present invention, wherein the connecting means  105  and the bending preventing means  140  of the cable connecting apparatus  100  are changed. That is,  FIG. 24  is a perspective view showing a state where the cable connecting apparatus is installed on the air-conditioning case and the controller,  FIG. 25  is an exploded perspective view of the cable connecting apparatus,  FIGS. 26 and 27  are views showing a state where a slide bar pushes and pulls the cable, and  FIGS. 28 and 29  are views showing a state where a boss portion is substituted with a roller. 
     The cable connecting apparatus  100  is directly connected to the actuating means  101  of the controller  50 , namely, the knob  80  of the switch  50   a,  in the first to third embodiments, but is connected to a gear lever  70  working in conjunction with the knob  80  when the passenger manipulates the knob  80  of the switch  50   a.    
     Here, the switch  50   a  having the gear lever  70  will be described. As shown in  FIG. 24 , the switch  50   a  includes: a gear shaft  60  having one end portion rotatably supported on a boss  52  protrudingly formed on the inner bottom face of the housing  51  and the other end portion protruding outwardly from the housing  51 ; the gear lever  70  rotatably joined to the boss  52  and gear-coupled with the gear shaft  60 ; and the knob  80  joined to an end portion of the gear shaft  60  protruding outwardly from the housing  51 . 
     In this instance, the gear shaft  60  adopts a beveled tooth form and the gear lever  70  corresponding to the gear shaft  60  adopts an arced tooth form. 
     Moreover, the connecting means  105  is a slide bar  160  back-and-forth slidably inserted into a receiving portion  151 , which is formed inside a casing  150  in a straight line. One end portion of the slide bar  160  is fixed to one end portion of the cable  130  and the other end portion is rotatably joined to the actuating means  101  and  102 . 
     Additionally, a receiving portion  151  is formed inside the casing  150  in a straight line in such a way that the slide bar  160  is slidably mounted therein, the bending preventing means  140  is mounted inside the casing  150 , and one end portion of the cable  130  is inserted into the receiving portion  151 . 
     In this instance, the casing  150  includes a tube fixing portion  153  formed at an inner end portion thereof in such a way that one end portion of the tube  131  wrapping the cable  130  is fixed thereto in a state where the tube  131  is inserted thereinto to a predetermined length, and the receiving portion  151  is formed at the other inner end portion of the casing  150 . 
     That is, the end portion of the tube  131  is fixed to the end portion of the casing  150  located on the opposite side of the slide bar  160  inside the casing  150 , and the slide bar  160  is mounted in a longitudinal direction of the cable  130 , which is mounted inside the casing  150 . 
     In the meantime, a cable support groove  154  is formed between the tube fixing portion  153  and the receiving portion  151  to support a portion of the cable  130  drawn out from the tube  131 . 
     Additionally, the casing  150  is rotatably joined to the housing  51  of the controller  50  or the air-conditioning case  10 . In this instance, the casing  150  further includes a hinged portion  156  protrudingly formed on one side of one end portion thereof in such a way that the casing  150  can be rotated in correspondence with the position of the actuating means  101  of the controller  50  or the actuating means  102  of the air-conditioning case  10 . 
     That is, since the gear lever  70  connected with the slide bar  160  of the casing  150  or the cam  21  is rotated, also the position of the slide bar  160  or the casing  150  must be varied within a predetermined range according to the varied position of the gear lever  70  or the cam  21 . 
     Accordingly, if the hinged portion  156  is formed at one side of the casing  150 , the position of the casing  150  is varied together with the position of the gear lever  70  or the cam  21  through the hinged portion  156  when the position of the gear lever  70  or the cam  21  is varied, whereby a smooth working is achieved. 
     In the meantime, projection portions  10   c    51   a  are respectively formed on the outer face of the air-conditioning case  10  and the housing  51  of the controller  50 , and the hinged portion  156  has a coupling hole  156   a  for rotatably coupling the projection portions  10   c  and  51   a.    
     Furthermore, the bending preventing means  140  includes supporting means  140   b  for closely supporting the cable  130  while moving along the cable  130  when the cable  130  slides back and forth together with the slide bar  160 . 
     The supporting means  140   b  includes: a sliding groove formed adjacent to the circumference of the receiving portion  151  inside the casing  150 , one end portion of the sliding groove communicating with the receiving portion  151 ; and a support guide  161  made of an elastic material and slidably inserted into the sliding groove  152 , one end portion of the support guide  161  being fixed to one end portion of the slide bar  160 , the support guide  161  being adapted to closely support a side of the cable while sliding together with the cable  130  when the slide bar  160  performs a sliding action. 
     A pair of the support guides  161  are fixed and joined to the end portion of the slide bar  160 , to which one end portion of the cable  130  is joined, in such a way as to be closely mounted at both sides of the cable  130 . 
     Now, a joining method of the support guide  161  and the slide bar  160  will be described. Each of the support guides  161  has an uneven portion  163  formed at one end portion thereof and the slide bar  160  has an uneven groove  162  formed at one end portion thereof in such a way that the uneven portion  163  of the support guide  161  is inserted and coupled to the uneven groove  162 . Alternatively, the end portion of the support guide  161  may be formed integrally with the end portion of the slide bar  160 . 
     Moreover, the support guides  161  have a predetermined length in such a way as to closely support both sides of the cable  130  drawn out from the tube  131  when the slide bar  160  slides. 
     Additionally, a pair of the sliding grooves  152  formed in such a way that a pair of the support guides  161  are slidably inserted thereinto are formed symmetrically relative to the receiving portion  151 . That is, a pair of the sliding grooves  152  are formed parallel adjacent to both sides of the receiving portion  151 . 
     In addition, a boss portion  155  as a pivot means  158  is formed at a portion, where the sliding groove  152  and the receiving portion  151  are connected with each other, to make the support guide  161  take a U-turn and be joined to the slide bar  160 , whereby the support guide  161  is prevented from a tangle. 
     Here, one end portion of the slide groove  152  is formed in a “U”-shape with a predetermined radius by the boss portion  155 . 
     Furthermore, the support guide  161  is mounted in such a way as to move (slide) in the opposite direction to a sliding direction of the slide bar  160 . That is, since the end portion of the support guide  161  takes the U-turn at the outer circumferential surface of the boss portion  155  and is fixed to the end portion of the slide bar  160 , the support guide  161  inserted into the sliding groove  152  moves (slides) in the opposite direction to the sliding direction of the slide bar  160 . 
     Moreover, since the support guide  161  slides while taking the U-turn in a predetermined radius along the outer circumferential surface of the boss portion  155  when the slide bar  160  slides, it can prevent the tangle of the support guide  161 . 
     In addition, as another preferred embodiment of the pivot means  158 , as shown in  FIGS. 28 and 29 , a roller  157  is formed at a portion, where the sliding groove  152  and the receiving portion  151  are connected with each other, to make the support guide  161  take a U-turn and be joined to the slide bar  160 , whereby the support guide  161  is prevented from a tangle. 
     That is, the roller  157  is mounted in place of the boss portion  155  to serve as the boss portion  155 . In this instance, if the roller  157  is mounted, when the slide bar  160  is rotated, the support guide  161  rotates the roller  157  and takes the U-turn along the outer circumferential surface of the roller  157  to thereby slide together with the slide bar  160 , and hence, a friction can be minimized during the above process. 
     In the meantime, the other end portion of the slide bar  160  is rotatably joined to a pin  70   a  formed on the gear lever  70  or to a pin  21   a  formed on the cam  21 . 
     Additionally, the casing  150  includes: a first casing  150   a  having the sliding grooves  152  and the receiving portion  151 ; and a second casing  150   b  joined with the first casing  150   a  and covering the receiving portion  151 . 
     As described above, since the elastic support guide  161  closely supports both sides of the cable  130  drawn out from the tube  131  while sliding together with the cable  130 , so that the cable  130  is used as the flexible cable  130  without any restriction in route of the cable  130  and it is prevented that the cable  130  is bent when the cable  130  is pushed, whereby the loss of the flexible cable  130  can be removed. 
     Hereinafter, an action of the cable connecting apparatus  100  according to the fourth preferred embodiment will be described. 
     First, when the passenger rotates the knob  80  of the switch  50   a  of the controller  50 , the gear shaft  60  rotates the gear lever  70  at a predetermined angle while rotating. 
     The gear lever  70  rotating at the predetermined angle pulls or pushes the slide bar  160  from or to the casing  150 , whereby the slide bar  160  slides back and forth inside the casing  150 . 
     In this instance, when the slide bar  160  of the casing  150  mounted on the controller  50  performs the back and forth sliding action, also the slide bar  160  of the casing  150  mounted on the air-conditioning case  10 , which is connected to the slide bar  160  of the casing  150  of the controller  50  through the cable  130 , performs the back and forth sliding action in interlock with the slide bar  160  of the casing  150  of the controller  50 . 
     That is, when the slide bar  160  of the casing  150  mounted on the controller  50  pulls one end portion of the cable  130 , the other end portion of the cable  130  pulls the slide bar  160  of the casing  150  mounted on the air-conditioning case  10 . On the contrary, when the slide bar  160  of the casing  150  mounted on the controller  50  pushes the one end portion of the cable  130 , the other end portion of the cable  130  pushes the slide bar  160  of the casing  150  mounted on the air-conditioning case  10 . 
     Continuously, when the slide bar  160  of the casing  150  mounted on the air-conditioning case  10  performs the back and forth sliding action, the cam  21  of the air-conditioning case  10  connected with the slide bar  160  is rotated. When the cam  21  is rotated, while the pins  26  of the levers  25  slide along the slots  22  of the cam  21 , the levers  25  are rotated at a predetermined angle, and then, the arms  28  interlocked with the levers  25  actuate the doors  16 . 
     Furthermore, when the slide bar  160  pulls or pushes the end portion of the cable  130  while performing the back and forth sliding action inside the casing  150 , also the support guides  161  joined to the slide bar  160  slide together with the cable  130  and closely support both sides of the cable  130  drawn out from the tube  131 , and thence, the cable  130  is prevented from being bent. 
     While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.