Patent Publication Number: US-2019195010-A1

Title: Anti-folder hand safety door

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to door technology and more particularly, to an anti-folder hand safety door. 
     2. Description of the Related Art 
     Generally speaking, the door panel and the door frame are pivotally connected to each other with hinges so that the door panel can be opened and closed relative to the door frame under the user&#39;s operation. In this case, the gap between the door panel and the door frame will gradually expand or contract as the door panel is being opened or closed. 
     When the door is opened, children frolicking around the door are likely to accidentally put their hands in the door gap, and if someone else has just closed the door, it is easy to get a finger jammed accident, such accident is sometimes unavoidable even for adults. Thus, the conventional doors are structurally invisible to some degree of danger, and there is still room for improvement in the use of safety. 
     SUMMARY OF THE INVENTION 
     The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide an anti-folder hand safety door, which prevents jammed finger injuries to ensure safe use without affecting closing and opening of the door panel. 
     To achieve this and other objects of the present invention, an anti-folder hand safety door comprises a door frame, a door panel, an adjustment mechanism and a door closer. The door frame comprises a header, a threshold, a first door jamb and a second door jamb. The first door jamb and the second door jamb are bilaterally connected between the header and the threshold to face toward each other. The first door jamb comprises a recess located on one side thereof and facing toward the second door jamb. The door panel comprises a top side pivotally connected to the header of the door frame, an opposing bottom side, a mounting hole defined in the bottom side and a convex hanging stile located on one lateral side thereof and facing toward the first door jamb of the door frame. The convex hanging stile is received in the recess of the first door jamb of the door frame when the door panel is closed in the door frame. The adjustment mechanism comprises a holder frame, a movable plate, a locating shaft and a fixed gear. The holder frame is mounted to a top surface of the threshold of the door frame adjacent to the first door jamb of the door frame. The movable plate is mounted in the holder frame and movable toward the first door jamb of the door frame. The locating shaft has a bottom side thereof affixed to the movable plate. The fixed gear is fixedly mounted on the locating shaft. The door closer comprises a body, a rotating shaft and a transmission gear. The body is mounted in the mounting hole of the door panel and pivotally connected to an opposing top side of the locating shaft so that the body is turnable about the locating shaft when the door panel is opened from the door frame. The rotating shaft is rotatable mounted in the body with a top end thereof disposed inside the body and an opposing bottom end thereof extended outside the body. The transmission gear is affixed to the bottom end of the rotating shaft and meshed with the fixed gear of the adjustment mechanism. Thus, when opening or closing the door panel, the transmission gear is driven by the rotating shaft to turn around the fixed gear. Since the fixed gear is not rotatable, the transmission gear will rotate on its own axis when turned around the fixed gear. Thus, the rotating shaft can be rotated with the transmission gear to drive a damping unit in the body, causing the damping unit to squeeze a hydraulic oil in producing a resistance against the opening or closing action of the door panel. 
     From the above we can see that the anti-folder hand safety door of the present invention utilizes the matching between the recess of the door frame and the convex hanging stile of the door panel to shield the door gap between the door panel and the door frame when the door panel is opened through an angle. After installation of the door panel or after several uses of the door panel, the adjustment screw can be rotated to adjust the position of the movable plate relative to the first door jamb of the door frame, ensuring that the convex hanging stile of the door panel can be received in the recess of the door frame when the door panel is closed. Thus, the anti-folder hand safety door prevents jammed finger injuries to ensure safe use without affecting closing and opening of the door panel, and allows adjustment of the position of the door panel at any time in a convenient manner, achieving the purpose of enhancing the safety and convenience of use. 
     Other advantages and features of the present invention will be fully understood by reference to the following specification in conjunction with the accompanying drawings, in which like reference signs denote like components of structure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an oblique top elevational view of an anti-folder hand safety door in a close status in accordance with the present invention. 
         FIG. 2  is an oblique top elevational view of the door frame of the anti-folder hand safety door in accordance with the present invention. 
         FIG. 3  an oblique top elevational view of the door panel of the anti-folder hand safety door in accordance with the present invention. 
         FIG. 4  is a plain view of the anti-folder hand safety door, illustrating the relative positioning between the pivot set and the door closer. 
         FIG. 5  is a sectional view taken along line  5 - 5  of  FIG. 4 . 
         FIG. 6  is an enlarged view of a part of  FIG. 5 . 
         FIG. 7  is similar to  FIG. 5 , illustrating the door panel opened at 45°. 
         FIG. 8  is similar to  FIG. 7 , illustrating the door panel opened at  90 ′. 
         FIG. 9  is an exploded view of the adjustment mechanism of the anti-folder hand safety door in accordance with the present invention. 
         FIG. 10  is a plain view of the adjustment mechanism of the anti-folder hand safety door in accordance with the present invention, illustrating four abutment members respectively stopped against the two opposite lateral sides of the movable plate. 
         FIG. 11  is a sectional view of a part of the adjustment mechanism of the anti-folder hand safety door in accordance with the present invention. 
         FIG. 12  is similar to  FIG. 11 , illustrating the adjustment screw rotated, the movable plate moved toward the first door jamb of the door frame. 
         FIG. 13  is a sectional view of a part of the adjustment mechanism of the anti-folder hand safety door in accordance with the present invention, illustrating the relationship between the locating shaft, the d gear, the transmission gear and the rotating shaft. 
         FIG. 14  is similar to  FIG. 13 , illustrating the transmission gear rotated on the axis thereof and turned around the fixed gear. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The advantages and features of the present invention will be fully understood by reference to the following specification in conjunction with the accompanying drawings, in which the directional terms such as “top”, “bottom”, “inner”, “outer”, “front”, “back” are descriptive terms based on the normal direction of use but not intended to limit the scope of the invention. 
     Referring to  FIGS. 1-4 , an anti-folder hand safety door  10  in accordance with the present invention is shown. The anti-folder hand safety door  10  comprises a door frame  20 , a door panel  30 , a spindle  40  and a cutter module  50 . 
     Referring to  FIG. 2 , the door frame  20  comprises a header  21 , a threshold  22 . A first door jamb  23  and a second door jamb  24 . The first door jamb  23  and the second door jamb  24  are respectively bilaterally connected between the header  21  and the threshold  22 . The first door jamb  23  comprises a recess  25  located on an inner side thereof and facing toward the second door jamb  24 . The recess  25  is a rectangular groove (see  FIG. 6 ) extended from a bottom side of the header  21  to a top side of the threshold  22 . 
     As illustrated in  FIG. 4 , the door panel  30  has one end of a top side thereof pivotally connected to one end of the header  21  of the door frame  20  by a pivot set  12  (this is of the known art and not within the scope of the invention, and we will not go into details herein). As illustrated in  FIGS. 3 and 4 , the door panel  30  comprises a mounting hole  31  defined in an opposing bottom side thereof adjacent to the first door jamb  23  of the door frame  20 , a convex hanging stile  32  located on one lateral side thereof and facing toward the first door jamb  23  of the door frame  20 , as illustrated in  FIG. 3 . The extending length of the convex hanging stile  32  is equal to the extending length of the recess  25  of the door frame  20 . Further, as illustrated in  FIG. 6 , the thickness T of the door panel  20  is smaller than the width W of the recess  25  so that when the door panel  30  is closed, as illustrated in  FIG. 5 , the convex hanging stile  32  of the door panel  30  is received in the recess  25  of the first door jamb  23  of the door frame  20 . If the door panel  30  is opened, the convex hanging stile  32  of the door panel  30  will be partially or completely moved out of the recess  25  of the first door jamb  23  of the door frame  20  according to the opening angle of the door panel  30 . For example, when the door panel  30  is opened at 45°, as illustrated in  FIG. 7 , one half of the convex hanging stile  32  of the door panel  30  is disposed outside the recess  25  of the first door jamb  23  of the door frame  20 , and the other half of the convex hanging stile  32  of the door panel  30  is received in the recess  25  of the first door jamb  23  of the door frame  20 ; when the door panel  30  is opened at  90 ′, as illustrated in  FIG. 8 , the convex hanging stile  32  of the door panel  30  is completely disposed outside the recess  25  of the first door jamb  23  of the door frame  20 . 
     Referring to  FIG. 9 , the adjustment mechanism  40  comprises a holder frame  41 , a movable plate  42 , an adjustment screw  43 , a stop ring  44 , two pairs of abutment members  45 , a locating shaft  46  and a fixed gear  47 . 
     The holder frame  41  is mounted to the top side of the threshold  22  of the door frame  20  (see  FIG. 1  and  FIG. 4 ), comprising an accommodation chamber  411 , two stop portions  412  disposed at one end thereof and facing toward each other, a gap  413  defined between the two stop portions  412  and disposed in communication with the accommodation chamber  411 , and an end groove  414  located on the same one end relative to the two stop portions  412  and disposed in communication with the gap  413 . The holder frame  41  has an opposite end thereof abutted against the first door jamb  23  of the door frame  20 . The holder frame  41  further comprises two pairs of through holes  415  symmetrically located on two opposite long sides thereof and respectively disposed in communication with the accommodation chamber  411 . 
     The movable plate  42  is mounted in the accommodation chamber  411  of the holder frame  40 , as illustrated in  FIG. 10 . The length and width of the movable plate  42  are respectively smaller than the length and width of the accommodation chamber  411  of the holder frame  40  so that the movable plate  42  can be moved back and forth as well as left and right. Further, the movable plate  42  comprises an adjustment screw hole  421  located on a right end thereof (the end adjacent to the stop portions  412  of the holder frame  41 ). The axial direction of the adjustment screw hole  421  extends perpendicular to the axial direction of the through holes  415  of the holder frame  41 . The movable plate  42  further comprises a non-circular locating hole  422  located on an opposite left end thereof (i.e., the end remote from the stop portions  412  of the holder frame  41 ). 
     The adjustment screw  43  comprises a screw head  431  and a screw shank  432 . As illustrated in  FIG. 10 , the screw head  431  is positioned in the end groove  414  of the holder frame  41  and abutted against the stop portions  412  of the holder frame  41  at an outer side (the side of the stop portions  412  opposite to the accommodation chamber  411 ). The screw shank  432  is inserted through the gap  413  of the holder frame  41 , having one end thereof fixedly connected to the screw head  431  and an opposite end thereof threaded into the adjustment screw hole  421  of the movable plate  42 . Thus, as illustrated in  FIGS. 1 and 12 , the adjustment screw  43  can be driven to rotate on the axis thereof by a hand tool (not shown). When the adjustment screw  43  is rotated, the movable plate  42  is caused to move toward the first door jamb  23  of the door panel  30 . 
     The stop ring  44  is affixed to the screw shank  432  of the adjustment screw  43  and abutted against an opposing inner side of the stop portions  412  of the holder frame  41  (the side of the stop portions  412  that faces toward the accommodation chamber  411 ), as illustrated in  FIG. 10 , to prohibit the adjustment screw  43  from falling out of the holder frame  41 . 
     The abutment members  45  are respectively inserted into the through holes  415  of the holder frame  41 . Each abutment member  45  has the distal end thereof extending out of the respective through hole  415  and stopped against one respective long side of the movable plate  42 , as illustrated in  FIG. 10 , for adjusting the biasing angle of the movable plate  42 . In order to facilitate adjustment, each abutment member  45  is configured to provide an outer thread around the periphery, and each through hole  415  is configured to provide an inner thread for the threading of the outer thread of the respective adjustment member  45 . Thus, the user can use a hand tool (such as screwdriver) to drive each abutment member  45  axially forward or backward in the respective through hole  415 . 
     The locating shaft  46  has a bottom end thereof inserted into and affixed to the non-circular locating hole  422  of the movable plate  42 , as illustrated in  FIG. 9  and  FIG. 11  so that the locating shaft  46  is movable with the movable plate  42 . 
     The fixed gear  47  is fixedly mounted on the locating shaft  46  and abutted to a top surface of the movable plate  42 , as illustrated in  FIG. 9  and  FIG. 11  so that on the one hand, the fixed gear  47  is prohibited from rotation on its own axis, and on the other hand, the fixed gear  47  can be moved with the locating shaft  46  and the movable plate  42 . 
     The door closer  50  comprises a body  51 , a rotating shaft  54 , and a transmission gear  55 . Other component parts of the door closer  50  are of the known art and not within the scope of the invention, and we will not go into details herein. As illustrated in  FIG. 4  and  FIG. 11 , the body  51  is mounted in the mounting hole  31  of the door panel  30 , comprising a pivot hole  52  located on a bottom side near one end thereof and an axle hole  53  disposed adjacent to the pivot hole  62 . The pivot hole  52  of the body  51  is pivotally coupled to an opposing end of the locating shaft  46  of the adjustment mechanism  40  by an axle bearing  56  so that the body  51  is biasable relative to the locating shaft  46  upon opening or closing of the door panel  30 . As illustrated in  FIG. 9  and  FIG. 11 , the top end of the rotating shaft  54  is disposed inside the body  51 ; the bottom end of the rotating shaft  54  extends downwardly out of the body  51 . The transmission gear  55  is fixedly mounted on the bottom end of the rotating shaft  54  and meshed with the fixed gear  47  of the adjustment mechanism  40 . Thus, when opening or closing the door panel  30 , the transmission gear  55  is driven by the rotating shaft  54  to turn around the fixed gear  47 , as illustrated in  FIG. 13  and  FIG. 14 . Since the fixed gear  47  is not rotatable, the transmission gear  55  will rotate on its own axis when turned around the fixed gear  47 . Thus, the rotating shaft  54  can be rotated with the transmission gear  55  to drive a damping unit (not shown) in the body  51 , causing the damping unit to squeeze a hydraulic oil in producing a resistance against the opening or closing action of the door panel. 
     From the above we can see that the anti-folder hand safety door  10  utilizes the matching between the recess  25  of the door frame  20  and the convex hanging stile  32  of the door panel  30  to shield the door gap between the door panel  30  and the door frame  20  when the door panel  30  is opened through an angle (see  FIG. 7  and  FIG. 8 ). After installation of the door panel  30  or after several uses of the door panel  30 , the adjustment screw  43  can be rotated to adjust the position of the movable plate  42  relative to the first door jamb  23  of the door frame  20 . When rotating the adjustment screw  43  to move the movable plate  42  toward the first door jamb  23  of the door frame  20 , as illustrated in  FIG. 11  and  FIG. 13 , the locating shaft  46  is moved with the movable plate  42  to drive the body  51  and the door panel  30  toward the first door jamb  23  of the door frame  20 , ensuring that the convex hanging stile  32  of the door panel  30  can be received in the recess  25  of the door frame  20  when the door panel  30  is closed. Further, the abutment members  45  can be moved to finely adjust the bias angle of the movable plate  42 , ensuring that the door panel  30  maintains its proper position when closed (for example, the position shown in  FIG. 6  where the convex hanging stile  32  of the door panel  30  is disposed in the middle of the recess  25  of the door frame  20 . Thus, the anti-folder hand safety door  10  prevents jammed finger injuries to ensure safe use without affecting closing and opening of the door panel, and allows adjustment of the position of the door panel  30  at anytime in a convenient manner, achieving the purpose of enhancing the safety and convenience of use.