Locking apparatus for a detachable sunshade of vehicles
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a locking apparatus of a detachable sunshade, and, more particularly, to a locking apparatus for a detachable sunshade of vehicles. 
     2. Description of the Prior Art 
     In a conventional locking apparatus for a detachable sunshade of vehicles which is attached so as to cover a detachable panel composed of a transparent board for opening and closing an opening of a vehicle roof from the interior thereof, locking operation of the sunshade and the detachable panel is attained by a connecting pin engaged with a naked handle. However, the handle must be rotated several times in order to release the locking state of the sunshade and the detachable panel and the sunshade drops by disconnecting the connecting pin when the handle is inadvertently rotated. 
     SUMMARY OF THE INVENTION 
     An object of the present invention is to provide an improved locking device for a detachable sunshade of vehicles which obviates the aforementioned drawbacks of the described conventional locking device for a detachable sunshade. 
     A further object of the present invention is to provide an improved locking device of a detachable sunshade of vehicles which can be reliably moved. 
     A still further object of this invention is to provide an improved locking apparatus for a detachable sunshade of vehicles which is relatively simple and includes a minimum number of parts. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Various objects, features and attendant advantages of the present invention will be more fully appreciated as the same becomes better understood from the following detailed description when considered in connection with the accompanying drawings in which like reference characters designate like or corresponding parts throughout the several views and wherein: 
     FIG. 1 is a top view of a vehicle roof which shows a detachable panel attached with a general sunshade; 
     FIG. 2 is an elevational sectional view which shows a preferred embodiment of a locking device for a detachable sunshade of vehicles according to the present invention; 
     FIG. 3 is a view similar to FIG. 2 which shows a main enlarged portion of FIG. 2; 
     FIG. 4 is an exploded perspective view which shows a main portion of the locking apparatus according to the present invention; 
     FIG. 5 is a sectional view taken along V--V in FIG. 3; 
     FIG. 6 is a similar view to FIG. 5, and which is taken along VI--VI in FIG. 5; and 
     FIG. 7 is a similar view to FIG. 5, and which is taken along VII--VII in FIG. 5. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring now to FIG. 1 showing a top view of a vehicle body 1, a detachable panel 2 is mounted on a roof portion as shown in FIG. 2. Detachable panel 2 is made of a transparent board and can open or close the roof portion by upwardly and downwardly moving a rear end portion 5 of the detachable panel 2 about a front end 3 according to operation in the arrowed direction of tiltable handle 4. 
     Reference numeral 6 denotes a sunshade detachably mounted in an interior side of the detachable panel 2. A front portion of the sunshade 6 is engaged by a hanging plate 8 engaging with a supporting plate 7 attached to the detachable panel 2 and a rear portion thereof is engaged by being inserted into an hole 11 of a holder 10 attached by a connecting pin 9 to the detachable panel 2 (FIG. 3). Tiltable handle 4 is rotatably supported by a fulcrum 12 and by a pin 14 of a toggle link 13 fixed to the fixed roof. 
     Connecting pin 9 is biased in the direction for engaging with the hole 11 of the holder 10 by a torsion spring 15. One end of the torsion spring 15 is engaged with an arm 16 and the other end thereof is engaged with a flanged portion 18 of a bracket 17 (FIG. 3). Both ends of the connecting pin 9 are guided by guiding members 19, 20 fixedly inserted into both sides of the bracket 17. Reference numeral 21 denotes a cover. Connecting pin 9 and the arm 16 are connected to each other by a pin 22 which passes through a lost-motion slot in either the arm 16 or the connecting pin 9. 
     As shown in FIG. 4, a plate 23 is provided with a hole 24, a radial hole 25, a circumferential hole 26, and a slot 27 continued with the hole 26. Reference number 28 indicates a spacer located between a locking handle 29 and the plate 23 and is provided with a hole 30 and a radial slot 31. Sunshade 6 is therefore located between the plate 23 and the bracket 17. Locking handle 29 is provided with a hole 32 at a central portion of a cap 41, a radial slot 33, and a recess 35 for sliding a knob 34 at a lateral portion thereof. Radial hole 25 of the slot 27 of the plate 23, the radial slot 31 of the spacer 28 and the radial slot 33 of the locking handle 29 are located at corresponding portions respectively. Reference numeral 36 denotes a projection mounted on the knob 34 and is inserted into the radial slot 33 of the locking handle 29, the radial slot 31 of the spacer 28, and the radial hole 25 of the slot 27 of the plate 23. 
     In FIGS. 5, 6, 7 knob 34 is provided with a slot 37 and a projecting portion 38. A spring 40 is interposed between a wall of a recessed portion 39 of the locking handle 29 and a right end of the knob for continuously leftwardly biasing the knob 34. Reference numeral 41 indicates a cap and 42 denotes a shaft. Shaft 42 is inserted through hole 32 in the cap 41 and the holes 30, 24 of the spacer 28 and the plate 23. Locking handle 29 and the shaft 42 are integrally fixed by a pin 43. Reference numeral 44 denotes a pin and 45 indicates a collar. Cap 41 is fixed to the locking handle 29 by screws 46, 47 and the plate 23 is fixed to the bracket 17 by screws 48, 49 through the sunshade 6. 
     Operation of the locking apparatus is as set forth hereinafter. Knob 34 of the locking handle 29 attached to a lower face of the sunshade 6 is depressed rightwardly against the biasing force of the spring 40 in FIG. 7 in order to remove the sunshade 6 from the vehicle interior. Therefore, the projection 36 of knob 34 is inwardly displaced from the state located outside of the radial slot 33 of the cap 41. Similarly the projection 36 of the knob 34 is also inwardly displaced from the state located outside of the radial slot 31 of the spacer 28 and the radial hole 25 of the slot 27 of the plate 23. Thereafter, when the locking handle 29 is rotated, the shaft 42 is rotated against the biasing force of the torsion spring 15. Accordingly, the rotational force of the shaft 42 releases the connecting pin 9 from the hole 11 of the holder 10 through the arm 16. At this time, the knob 34 is also rotated according to rotation of the locking handle 29 and the projection 36 of the knob 34 is displaced in the opposite circumferential direction to the radial hole 25 within the circumferential hole 26 of the slot 27 of the plate 23 (FIG. 4). Thereafter, the front portion of the sunshade 6 is released from the hanging plate 8 and the sunshade 6 can be removed from the detachable panel 2 (FIG. 2). 
     Next, when the sunshade 6 is attached to the detachable panel 2 after the sunshade 6 is removed form the detachable panel 2, the front portion of the sunshade 6 is hung on the hanging plate 8. As above mentioned in the operation discussion, the knob 34 is inwardly depressed and the locking handle 29 is rotated. Therefore, the connecting pin 9 is shifted leftwardly, namely in FIG. 3, displaced in the inward direction of the cover 21, and thereafter the connecting pin 9 is shifted toward the position of the hole 11 of the holder 10, thereby engaging the connecting pin 9 with the hole 11 of the holder 10 by the biasing force of the torsion spring 15 and returning the locking handle 29 to the nonoperating position through the shaft 42 (FIG. 7). 
     By the foregoing, there has been disclosed a prefered form of a locking apparatus of a detachable sunshade for vehicles constructed in accordance with the present invention. It will be appreciated that various additions, substitutions, modifications and omissions may be made thereto without departing from the spirit of the invention.