Abstract:
An apparatus to lock a vehicle seat-rail includes a locking pin to pass through a fixing bracket, and a detachment preventing device to inhibit the locking pin from being detached from the fixing bracket in a direction, while the locking pin moves on the fixing bracket. In particular, the detachment preventing device includes: a catching jaw formed in the locking pin; a guide hole formed in an end of the fixing bracket; and a bush to wrap around the locking pin. The catching jaw is caught the bush and thus the locking pin inserted in the guide hole is inhibited from being detached.

Description:
CROSS-REFERENCES TO RELATED APPLICATION 
     This application claims the benefit of Korean Patent Application No. 10-2014-0193208, filed on Dec. 30, 2014, which is hereby incorporated by reference in its entirety. 
     FIELD 
     The present disclosure relates to an apparatus for locking a vehicle seat-rail that improves the assembly convenience and enhances space utilization of the seat-rail. 
     BACKGROUND 
     The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. 
     In general, seats installed in a vehicle can be adjusted while sliding forward and backward to match the passenger&#39;s body conditions, and an apparatus for locking the seat-rails for fixing the moved seat is installed below the seats. 
       FIG. 1  illustrates a “seat-rail locking apparatus” according to the prior art (i.e., Korean Patent No. 10-1294388) that is configured to include a low rail  110  that is coupled to a floor panel inside a passenger compartment, an upper rail  120  that is installed to slide along the low rail  110  while being coupled to the seat cushion frame, and a locking pin assembly  200  that restrains the free movement of the upper rail  120  relative to the low rail  110 . 
     Further, the locking pin assembly  200  is provided with a pin member  210  through the upper end of the upper rail  120 , and a lower end portion of the pin member  210  is fitted to a locking hole  111  formed in the low rail  110  to constrain the sliding movement of the upper rail  120 , thereby being able to fix the forward and backward movements of the seat. 
     Here, a rotationally operated locking lever  300  is installed on the side surface of the upper rail  120 , and the end portion of the locking lever  300  is configured to be caught in the pin member  210  protruding to the upper side of the upper rail  120 . 
     Therefore, when rotationally operating the locking lever, while the pin member caught in the end portion of the locking lever is moved upward toward the upper portion, the lower end portion of the pin member is disengaged from the locking hole, thereby making it possible to move the seat back and forth, while allowing the sliding movement of the upper rail with respect to the low rail. 
     However, in the conventional seat-rail locking apparatus, since the end portion of the locking lever is located above the upper rail and the locking lever is fitted to the pin member, an amount of protrusion of the upper end of the pin member protruding to the upper side of the upper rail increases. 
     To solve this problem, a structure configured so that the unlocking operation of the locking lever and the pin member is performed inside the seat-rail is suggested. However, in this case, since the lower end portion of the locking pin and the end portion of the locking lever should be inserted into the seat-rail, the locking pin and the locking lever are separately assembled to the seat-rail, thereby reducing the assembling and operating convenience of the components for forming the locking apparatus. 
     The above-mentioned matters described as the background art are only for understanding of the background of the present disclosure, but should not be recognized as corresponding to the already known prior art to those of ordinary skill in the art. 
     SUMMARY 
     The present disclosure provides an apparatus for locking a vehicle seat-rail which reduces interference with the seat-rail, while assembling the locking pin and the locking lever to the seat-rail at a time, thereby improving convenience associated with the assembling operation. 
     Another aspect of the present disclosure is to provide an apparatus for locking a vehicle seat-rail which enhances space usability of the seat-rail upper portion and reduces the exposure of the components to the outside, by providing that the unlocking operation of the locking pin is performed in a space in the upper rail. 
     According to one form of the present disclosure, there is provided an apparatus for locking a vehicle seat-rail that includes a locking pin that is provided to pass through the fixing bracket and is linearly movable; and a detachment preventing means that prevents the locking pin from being detached from the fixing bracket in a direction, while allowing the linear movement of the locking pin. 
     In the detachment preventing means, a catching jaw is formed in one end portion of the locking pin; a guide hole is formed at the end portion of the fixing bracket, the other end portion of the locking pin is provided to pass through the guide hole; and a fixing bush that is formed in a shape to wrap around the locking pin and is fixed to the inner surface of the guide hole, while guiding the locking pin, its end portion being caught on the catching jaw. 
     The fixing bush may include a support plate in which a bush hole is formed, the locking pin is inserted into the bush hole and which is supported on the bottom surface of the fixing bracket; an engaging hook portion that is formed to be spaced along the circumferential direction of the bush hole, is fixed to the support plate at a lower end portion, and has an upper end portion caught on the upper surface of the fixing bracket, while passing through the guide hole; and a support portion that is formed to be spaced along the circumferential direction of the bush hole, is fixed to the support plate at a lower end portion, and has an upper end portion caught on the bottom surface of the catching jaw, while passing through the guide hole. 
     The engaging hook portion and the support portion may be alternately arranged along the circumferential direction of the bush hole. 
     Each of the engaging hook portion and the support portion may be arranged to face each other around the axial center of the bushing hole. 
     The upper end portion of the support portion is formed to be bent toward the axial center of the bushing hole, and the locking pin may slide along the upper end inner circumferential surface of the support portion that is formed to be bent. 
     The catching jaw is formed with an inclined portion in a shape that is gradually narrowed toward the one end portion of the locking pin at the interruption of the locking pin, a maximum diameter of the locking pin meeting the upper end portion of the inclined portion is formed to correspond to the diameter of the lower end portion of the inclined portion, and the catching jaw is be formed on the upper end portion of the inclined portion. 
     The apparatus further includes a moving rail with the fixing bracket fixed to an outer surface thereof; and an unlock lever in which an interruption is rotatably coupled to the fixing bracket; a rotation stopper is formed to protrude from the side surface of the unlock lever, and a fixing stopper is provided on the path in which the rotation stopper rotates, thereby regulating the unlock lever from excessively rotating in one direction at the time of rotation of the unlock lever. 
     The unlock lever is provided so that the one end portion is located outside the moving rail and the other end portion is located inside the moving rail; the rotation stopper is formed between the interruption of the unlock lever and the one end portion; the fixing stopper is formed at the upper end position of the portion in which the unlock lever is axially coupled, and the rotation stopper is caught on the fixing stopper when the one end portion of the unlock lever rotates toward the upper end portion of the fixing bracket. 
     Lever coupling portions are formed to protrude from both side ends of the fixing bracket; the interruption of the unlock lever is axially coupled between the lever coupling portion; and the fixing stopper may be formed to protrude from the upper end of the lever coupling portion. 
     A circular pinhole is formed at the center of the lever coupling portion; the hinge pin is coupled to the interruption of the unlock lever; and both end portions of the hinge pin are coupled to the pinhole to pass through, thereby being able to inhibit the detachment of the hinge pin coupled to the pin hole. 
     A lever assembly in which the unlock lever is coupled to the side portion of the fixing bracket while the locking pin penetrates the fixing bracket is assembled in a module; an upper engaging window and a side engaging window are formed in each of the upper end portion and the side end portion of the moving rail; upon assembly of the lever assembly to the moving rail, while the lower end portion of the locking pin is inserted to the upper engaging window and the other end portion of the unlock lever is inserted to the side engaging window, the fixing bracket can be fixed to the outer upper surface and the side surfaces of the moving rail formed around the engaging window. 
     An unlock flange is formed at the interruption of the locking pin; and upon assembly of the lever assembly to the moving rail, the unlock flange can be located in the interior space of the moving rail. 
     A plurality of locking pins is provided; the other end portion of the unlock lever is formed in a fork shape, and when the unlock lever rotates, the other end portion of the unlock lever is caught on the bottom surface of the unlock flange to vertically operate the locking pin. 
     Through the means for solving the problem as described above, according to the present disclosure, since one end portion of the unlock lever is inhibited from being excessively rotated in the direction toward the upper end portion of the fixing bracket, it is possible to appropriately regulate the position of the other end portion of the unlock lever. Therefore, when assembling the lever assembly to the moving rail, since the locking pin and the unlock lever are simultaneously inserted to the engaging window formed in the moving rail without interfering with the moving rail, there is an effect of improving the ease of assembly of the lever assembly. 
     Further, since the upward movement operation of the locking pin is performed within the internal space of the seat-rail, the parts attached or exposed to the outside of the seat-rail are reduced to enhance the space utilization formed at the top of the moving rail, and thus, a compact seat-rail may be designed. 
     Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. 
    
    
     
       DRAWINGS 
       In order that the disclosure may be well understood, there will now be described various forms thereof, given by way of example, reference being made to the accompanying drawings, in which: 
         FIG. 1  is a diagram for explaining a structure of a seat-rail locking apparatus according to a related art; 
         FIG. 2  is a diagram for explaining a structure of a seat-rail locking apparatus; 
         FIG. 3  is a diagram illustrating a state in a lever assembly and a moving rail are disassembled in the seat-rail locking apparatus; 
         FIG. 4  is a diagram for explaining the state before and after operation of the locking pin; 
         FIG. 5  is a diagram for explaining the shape of the fixing bush; 
         FIG. 6  is a diagram for explaining a shape of the unlock lever; 
         FIG. 7  is a diagram for explaining a method of assembling the lever assembly to the moving rail in the seat-rail locking apparatus; and 
         FIG. 8  is a diagram illustrating a state before and after the locking operation using the seat-rail locking apparatus. 
     
    
    
     The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. 
     DETAILED DESCRIPTION 
     The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features. 
     It will be understood that although the terms “first”, “second”, etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. 
     A seat-rail locking apparatus of the present disclosure is configured to largely include a fixing bracket  40  and an unlock lever  50 . 
     Prior to describing the characteristic technical construction of the present disclosure, the coupling and operating relation between the moving rail  10  and the fixed rail  20  will be briefly described with reference to  FIG. 2 . The fixed rail  20  is coupled to a floor panel (not illustrated) in a passenger compartment in a front and rear lengthwise direction, and the moving rail  10  is installed to slide along the fixed rail  20 , while being coupled to a seat cushion frame (not illustrated). 
     Further, a plurality of locking holes  21  may be formed at the horizontally formed lower end portion of the fixed rail  20  along its length at regular intervals, and a plurality of locking pins  70  may be provided by being to inserted in an upper engaging window  11  formed in the upper end portion of the moving rail  10  formed to face the fixed rail  20  side by side along its lengthwise direction. 
     Further, an operating portion  51  is formed at the one end portion of the unlock lever  50 , a hinge portion  55  is formed at an interruption, and a fork portion  53  is formed at the other end portion. Thus, at the time of pushing operation of the operating portion  51 , the fork portion  53  is rotationally operated around the hinge portion  55 . 
     Thus, at the time of the rotational operation of the unlock lever  50 , the fork portion  53  formed at the other end portion is operated to raise the locking pin  70  upward to move the locking pin  70  upward, and thus, the locking pin  70  is detached from the locking hole  21  of the fixed rail  20  to unlock the seat-rail. 
     At this time, as illustrated in  FIG. 6 , the hinge portion  55  can be formed in a structure that wraps around the hinge pin  60  so that the hinge pin  60  described later is inserted and the unlock lever  50  can pivot about the hinge pin. Also, the fork portion  53  can be formed so that a plurality of fork pins is spaced at predetermined intervals, the fork pin is between the locking pins  70 , and the fork pins can be formed to be smaller by one than the number of the locking pins. 
     Meanwhile, referring to  FIGS. 3 to 5 , the locking pin  70  of the present disclosure is provided to vertically penetrate at the end portion of the fixing bracket  40  and is provided to be vertically and linearly movable. 
     In particular, the detachment preventing means may be configured to inhibit the locking pin  70  from being detached downward from the fixing bracket  40 , while allowing the linear movement of the locking pin  70 . 
     The above detachment preventing means will be described. A catching jaw  73  is formed in the upper end portion of the locking pin  70 . Further, a plurality of guide holes  41  is formed at the end portion of the fixing bracket  40 , and the other end portion of the locking pin  70  is provided to penetrate the guide hole  41 . 
     At this time, a fixing bush  90  may be provided between the outer surface of the outer surface of the locking pin  70  and the inner surface of the guide hole  41 , the fixing bush  90  is formed to have a shape that wraps around the locking pin  70 , the locking pin  70  is guided along the inner surface, and the outer surface is fixed to the inner surface of the guide hole  41 . Further, the bottom surface of the catching jaw  73  is caught on the upper end portion of the fixing bushing  90 , and thus, the locking pin  70  inserted in the guide hole  41  of the fixing bracket  40  is inhibited from being detached in the lower part of the guide hole  41 . 
     That is, according to the configuration described above, before the fixing bracket  40  is assembled to the moving rail  10 , the locking pin  70  is assembled to the fixing bracket  40 , and the locking pin  70  is inhibited from being detached from the fixing bracket  40  by the detachment preventing means. 
     Therefore, when the lever assembly  30  including the fixing bracket  40 , the unlock lever  50  and the locking king pin  70  is assembled to the moving rail  10  later, the lever assembly  30  can be simply inserted and assembled to the moving rail  10 , without a risk of detachment of the locking pin  70 . 
     In the present disclosure, the fixing bush  90  can be integrally inserted into each guide hole  41 , and can be configured to include the support plate  91 , the engaging hook portion  93  and the support portion  95 . 
     Referring to  FIGS. 3 to 5  again, the support plate  91  is formed with the bush holes  91   a  at the position corresponding to the guide hole  41 , the locking pin  7  is inserted to the bush hole  91   a , and its upper surface can be supported on the bottom surface of the fixing bracket  40 . 
     Further, the engaging hook portion  93  is formed to be spaced at a predetermined interval along the circumferential direction of the bush hole  91   a , its lower end portion is fixed to the support plate  91 , and its upper end portion is caught on the upper surface of the fixing bracket  40 , i.e., around the upper end of the guide hole  41  in a hook structure, while passing through the guide hole  41 . 
     The support portion  95  is formed to be spaced at a predetermined along the circumferential direction of the bush hole  91   a , its lower end portion is fixed to the support plate  91 , and its upper end portion can be supported on the bottom surface of the catching jaw  73 , while passing through the guide hole  41 . 
     At this time, the locking jaws  73  is formed with an inclined portion  75  having a shape that is gradually narrowed toward the upper end portion of the locking pin  70  at the interruption of the locking pin  70 , and the maximum diameter D of the locking pin  70  that meets the upper end portion of the inclined portion  75  is formed to correspond to the diameter D′ of the lower end portion of the inclined portion  75 , and the catching jaw  73  can be formed at the upper end portion of the inclined portion  75 . 
     Further, the engaging hook portion  93  and the support portion  95  may be alternately arranged along the circumferential direction of the bush hole  91   a.    
     In addition, the engaging hooks  93  are arranged to be opposed each other around the axial center of the bush hole  91   a , each support portion  95  may be arranged to be opposed to each other around the axial center of the bush hole  91   a.    
     In addition, the upper end portion of the support part  95  is formed to be bent toward the axial center of the bush hole  91   a , and the outer circumferential surface of the locking pin  70  can be moved while sliding along the inner circumferential surface of the upper end portion of the support portion  95  which is formed to be bent. 
     That is, since the upper end portion of the support portion  95  is formed to be bent toward the locking jaws  73 , before the lever assembly  30  is assembled to the moving rail  10 , the upper end portion of the support  95  is caught on the bottom surface of the catching jaw  73 , the detachment of the locking pin  70  is inhibited. After the assembling of the lever assembly  30 , when the locking pin  70  is operated, the upper end portion of the support portion  95  radially outward opens, while moving along the inclined portion  75 , thereby allowing the vertical movement of the locking pin  70 . 
     Meanwhile, referring to  FIGS. 2 and 3 , the fixing bracket  40  is provided in a shape to partially cover the upper surface and the side surface of the moving rail  10 , and the unlock lever  50  and the locking pin  70  described below are coupled to each other to form the lever assembly  30 . 
     The interruption of the unlock lever  50  is rotatably and pivotally coupled to the fixing bracket  40 . 
     At this time, a rotation stopper  57  is formed to protrude from the side surface of the unlock lever  50 , and a fixing stopper  47  is provided in a rotation path of the rotation stopper  57  to regulate that excessive rotation of the unlock lever  50  in one direction. 
     For example, as illustrated in  FIGS. 2 and 4 , the unlock lever  50  is provided so that, when assembled to the moving rail  10 , the operating portion  51  formed at one end portion is located outside the moving rail  10  and the fork portion  53  formed at the other end portion is located inside the moving rail  10 . 
     Thus, the rotation stopper  57  may be formed on the side surface toward one end portion at the interruption of the unlock lever  50 , and the fixing stopper  47  may be configured so that the unlock lever  50  is formed at the upper end position of the pivotally coupled portion, and the rotation stopper  57  is caught in the fixing stopper  47  when the one end portion of the unlock lever  50  rotates toward the upper end portion of the fixing bracket  40 . 
     Here, the lever coupling portions  43  are formed to protrude from both side ends of the fixing bracket  40 , and the interruption of the unlock lever  50  is pivotally coupled between the both lever coupling portions  43 . According to this, the fixing stopper  47  may be formed to protrude from the upper end of the lever coupling portion  43 . 
     That is, according to the configuration described above, before the fixing bracket  40  is assembled to the moving rail  10 , in a state in which the unlock lever  50  is pivotally coupled to the lever coupling portion  43 , the rotation stopper  57  formed in the unlock lever  50  is caught in the fixing stopper  47  formed in the lever coupling portion  43 . 
     Thus, the one end portion of the unlock lever  50  is inhibited from being excessively rotated in the direction toward the upper end portion of the fixing bracket  40 , thereby being able to appropriately regulate the position of the other end portion of the unlock lever  50 . Thus, in the future, when the lever assembly  30  including the fixing bracket  40 , the unlock lever  50  and the locking pin  70  is assembled to the moving rail  10 , the unlock lever  50  and the locking pin  70  can be assembled by being simply inserted into the moving rail  10 . 
     In addition, referring to  FIGS. 2 and 3 , a circular pinhole  45  is formed at the intermediate of the lever coupling portion  43 , and the hinge pin  60  can be coupled to the interruption of the unlock lever  50 . At this time, an unlock restoring spring  61  can be prepared in the hinge pin  60  to provide an elastic restoring force to the unlocking rotation direction of the unlock lever  50 . Here, one end of the unlock restoring spring  61  can be supported on a bottom surface of one end portion of the unlock lever  50 , and the other end portion of the unlock restoring spring  61  can be supported on a part of the fixing bracket  40 . 
     In particular, since the both end portions of the hinge pin  60  is coupled through the pinhole  45 , the detachment of the hinge pin  60  coupled to the pin hole  45  can be inhibited. 
     That is, since only the pin hole  45  is formed on the lever coupling portion  43 , after assembling by inserting the hinge pin  60  to the pinhole  45 , the hinge pin  60  cannot be detached from the pin hole  45 . 
     Meanwhile, referring to  FIGS. 3 and 7 , while the lower end portion of the locking pin  70  penetrates the fixing bracket  40 , the unlock lever  50  is coupled to the side portion of the fixing bracket  40  to form the lever assembly  30 , and the lever assembly  30  may be assembled in a module. 
     Further, each of the upper engaging window  11  and the side engaging window  13  is formed in the upper end portion and side end portion of the moving rail  10  in an open shape. At this time, since a section between both the lever coupling portions  43  corresponding to the hinge pin  60  is also formed in an open shape, the open portion can be assembled with the side engaging window  13  in an overlapping manner, and the other end portion of the unlock lever  50  can be inserted into the side engaging window  13 . 
     According to this, when assembling the moving rail  10  to the lever assembly  30 , the lower end portion of the locking pin  70  is inserted to the upper engaging window  11 , and at the same time, the other end portion of the unlock lever  50  is inserted to the side engaging window  13 . Thus, since the fixing bracket  40  is fixed in a state of surface contact to the outside upper surface and the side surface of the moving rail  10  formed around the upper engaging window  11  and the side engaging window  13  through the simple assembly of the lever assembly  30 , it is possible to improve the assembling convenience of the lever assembly  30 . 
     Meanwhile, referring to  FIGS. 2 and 8 , the present disclosure can be configured so that the unlock flange  71  is formed at the interruption of the locking pin  70 , and when assembling the lever assembly  30  to the moving rail  10 , the unlock flange  71  is located in the inner space of the moving rail  10 . 
     For example, a number of guide holes  41  is formed at the end portion of the fixing bracket  40  along the lengthwise direction in which the moving rail  10  is moved, the locking pins  70  are each provided in the guide holes  41 , and a large number of locking pins  70  can be provided in the fixing bracket  40 . At this time, a structure that allows the upper and lower guide movement of the locking pin  70  but inhibits detachment of the locking pin  70  from the guide hole  41  may be separately prepared between the guide hole  41  and the locking pin  70 . 
     Further, a fork-shaped fork portion  53  is formed at the other end portion of the unlock lever  50 , the other end portion of the unlock lever  50  is caught in the bottom of the unlock flange  71  to vertically move the locking pin  70  at the time of rotational movement of the unlock lever  50 , and thus, the locking pin  70  can be locked or unlocked to the locking hole  21  formed in the fixed rail  20 . 
     At this time, a locking restoring spring  80  may be provided between the upper face of the unlock flanges  71  and the bottom surface of the fixing bracket  40  to provide an elastic restoring force to the movement direction of the locking pin  70  that is moved upward. 
     According to this configuration, the fork portion  53  of the unlock lever  50  and the unlock flange  71  portion of the locking pin  70  are disposed inside the seat-rail, and the upward moving operation of the locking pin  70  is also performed within the inner space of the seat-rail, thereby reducing the components attached or exposed to the outside of the seat-rail. Thus, it is possible to provide a compact design of the seat-rail by enhancing the upper space utilization of the moving rail  10 , and it is possible to improve marketability of the seat-rail locking apparatus. 
     Meanwhile, a method for assembling the apparatus for locking the vehicle seat-rail of the present disclosure described earlier may include a preparing step and an assembling step. 
     Referring to  FIGS. 5 and 7 , first, at the preparing step, it is possible to prepare the lever assembly  30  in which the locking pin  40  and the unlock lever  50  are coupled to the fixing bracket  70  in a module. 
     For example, since the lever assembly  30  is configured so that the locking pin  70  is provided through one side portion of the fixing bracket  40  and the unlock lever  50  is coupled to the other side portion of the fixing bracket  40 , the lever assembly  30  can be prepared in a module. 
     At this time, since the locking pin  70  penetrates with respect to the fixing bracket  40  in a vertical state, when assembling the locking pin  70  to the moving rail  10 , the lower end portion of the locking pin  70  can be disposed to face the upper engaging window  11 . 
     Further, the unlock lever  50  is rotatably coupled to the fixing bracket  40  in a state of being oblique with respect to the vertically coupled locking pin  70 , and in another form, in a state in which its lower end portion is obliquely inclined toward the lower end portion of the locking pin  70 . Thus, when assembling the unlock lever  50  to the moving rail  10 , the lower end portion of the unlock lever  50  may be disposed to face the side engaging window  13 . 
     That is, according to the above-described configuration, since the lower end portion of the locking pin  70  is vertically arranged toward the upper engaging window  11 , and the lower end portion of the unlock lever  50  is obliquely arranged toward the side engaging window  13 , when assembling the lever assembly  30  to the moving rail  10 , the locking pin  70  and the unlock lever  50  can assembled to the moving rail  10  at a time. 
     In particular, as described above, in the present disclosure, it is possible to add a structure that restricts the unlock lever  50  from being excessively rotated in one direction. 
     For example, the rotation stopper  57  is formed to protrude from the side surface of the unlock lever  50 , and the fixing stopper  47  is provided in the rotation path of the rotation stopper  57  to regulate the excessive rotation of the unlock lever  50  in the nearly vertical direction at the time of rotation of the unlock lever  50 . 
     That is, before assembling the lever assembly  30  to the moving rail  10 , when the excessive rotation of the unlock lever  50  is not regulated and the unlock lever  50  rotates nearly vertically, since the lower end portion of the unlock lever  50  does not face the side engaging window  13 , finally, there is a need for an operator to perform a work of holding the lower end portion of the unlock lever  50  and pushing it into the side engaging window  13  at the time of assembling work, and thus, there is a problem of declines in assembling characteristics and assembly convenience of the locking apparatus. 
     Therefore, in the case of the present disclosure, before assembling the lever assembly  30  to the moving rail  10  through a stopper structure, by maintaining a state in which the lower end portion of the unlock lever  50  faces the side engaging window  13 , the working convenience for assembling the lever assembly  30  to the moving rail  10  is improved. 
     Next, at the assembling step, the lower end portion of the locking pin  70  is inserted into the upper engaging window  11  formed at the upper end portion of the rail, and at the same time, the lower end portion of the unlock lever  50  is inserted into the side engaging window  13  formed at the side end portion of the moving rail  10 , thereby being able to assembling the lever assembly  30  to the moving rail  10  at a time. 
     For example, since the lower end portion of the locking pin  70  and the lower end portion of the unlock lever  50  are inserted into the upper engaging window  11  and the side engaging window  13 , the fixing bracket  40  can be fixed to the outer upper surface and the side surface of the moving rail  10  formed around the engaging window. 
     According to such a configuration, it is possible to appropriately regulate the position of the other end portion of the unlock lever  50  so that the other end portion of the unlock lever  50  is not deviated in a direction other than the direction facing the side engaging window  13 . Therefore, when assembling the lever assembly  30  to the moving rail  10 , since the locking pin  70  and the unlock lever  50  are simultaneously inserted into the engaging windows formed in the moving rail  10  without interfering with the moving rail  10 , thereby improving the assembly convenience of the lever assembly. 
     While the present disclosure has been illustrated and described with reference to exemplary forms thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure.