Patent Publication Number: US-11655655-B2

Title: Door lock device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Taiwan Application Serial No. 109202437, filed on Mar. 5, 2020. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to locks, and more particularly, to a door lock device for a fire door. 
     2. Description of Related Art 
     Conventionally, an emergency exit door lock is unlocked by pushing so as to open the door for an escape route. 
     However, since the lock is generally arranged outside the door with its lock head extending or retracting at a door position, it is easily stolen or damaged during long-term use. 
     Therefore, how to overcome the above-described drawbacks of the prior art has become an urgent issue in the art. 
     SUMMARY 
     In view of the above-described drawbacks, the present disclosure provides a door lock device, which comprises: a lock assembly comprising a driving member, an acting member connected to the driving member, an active member cooperating with the acting member for operation, and a main lock member interlocked with the active member, wherein the driving member drives the acting member to swing and the acting member touches the active member to displace the active member and synchronously displace the main lock member; and an operation assembly interlocked with the driving member of the lock assembly. 
     In an embodiment, the lock assembly further comprises a housing structure configured with the main lock member and the active member, and wherein the main lock member is displaced relative to the housing structure to extend out of or retract into the housing structure and the active member is displaceably disposed on the housing structure and securely connected to the main lock member. For example, the lock assembly further comprises a carrier structure fastened onto the housing structure, and wherein the main lock member is connected to the carrier structure in a manner that the main lock member is displaceable relative to the carrier structure. 
     In an embodiment, the driving member is a shaft body, wherein one end portion of the driving member is formed with a sliding portion displaceably connected to the operation assembly and another end portion of the driving member is securely connected to the acting member to drive the acting member to swing. 
     In an embodiment, the acting member is of a spoon shape and has a spoon body engaged on the driving member and a handle portion connected to the spoon body to swing about the driving member as an axis. 
     In an embodiment, the active member has a displacement portion displaceable toward a certain direction, a force bearing portion disposed on the displacement portion, and a fastening portion disposed on the displacement portion and securely connected to the main lock member, wherein the acting member hooks and causes the force bearing portion to displace and enables the displacement portion to displace linearly and to drive the fastening portion, allowing the fastening portion to displace together with the main lock member. 
     In an embodiment, the operation assembly comprises at least one acting mechanism and an interlocking mechanism interlocking the acting mechanism and the driving member. For example, the acting mechanism has a rotating member, an actuating member and a fastening member, wherein the rotating member has a shaft portion, with a first arm portion and a second arm portion connected to different sides of the shaft portion, the shaft portion being connected to the fastening member, the first arm portion being connected to the actuating member, and the second arm portion being connected to the interlocking mechanism. In an embodiment, the interlocking mechanism has an interlocking member connected to the acting mechanism and an inactive member connected to the interlocking member, wherein one side of the inactive member is connected to the interlocking member and another side of the inactive member is displaceably connected to the driving member. 
     In an embodiment, the door lock device further comprises a handle assembly encapsulating the operation assembly. 
     Therefore, the door lock device according to the present disclosure allows the lock assembly to be buried in a door frame through cooperation of the driving member, the acting member and the active member, thereby protecting the lock assembly from being damaged or stolen. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1 A  is a schematic front perspective view of a door lock device in use according to the present disclosure; 
         FIG.  1 B  is a schematic partially exploded perspective view of  FIG.  1 A ; 
         FIG.  2 A  is a schematic partial front perspective view of a door lock device according to the present disclosure; 
         FIG.  2 B  is a schematic exploded perspective view of  FIG.  2 A ; 
         FIG.  2 C  is a schematic partial rear perspective view of a door lock device according to the present disclosure; 
         FIG.  2 D  is a schematic partially exploded perspective view of  FIG.  2 C ; 
         FIGS.  3 A and  3 B  are schematic partial front views of a door lock device in operation according to the present disclosure; and 
         FIGS.  3 A ′ and  3 B′ are schematic partial rear views of a door lock device in operation according to the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The following illustrative embodiments are provided to illustrate the present disclosure, these and other advantages and effects can be apparent to those in the art after reading this specification. 
     It should be noted that all the drawings are not intended to limit the present disclosure. Various modifications and variations can be made without departing from the spirit of the present disclosure. Further, terms such as “up,” “down,” “front,” “rear,” “left,” “right,” “a,” etc., are merely for illustrative purposes and should not be construed to limit the scope of the present disclosure. 
       FIGS.  1 A and  1 B  are schematic views illustrating application of a door lock device  1  to a door structure  9  according to the present disclosure. As shown in  FIGS.  1 A and  1 B , the door structure  9  comprises a set of a door frame  90  corresponding in size to a door opening and a door plate  91  attached to the door frame  90 . The door lock device  1  is, for example, a headless lock box type fireproof door lock, which includes a lock assembly  2  buried in the door frame  90 , an operation assembly  3  disposed outside the door frame  90  and the door plate  91  and interlocked with the lock assembly  2 , and a handle assembly  1 ′ encapsulating the operation assembly  3 . 
     In an embodiment, a front or rear direction such as an arrow direction X is defined along an entry or exit direction of the door, a left or right direction such as an arrow direction Y is defined along a direction of a short side of the door plate  91 , and an up or down direction such as an arrow direction Z is defined along a direction of a height of the door plate  91 . It should be noted that the arrow directions X, Y and Z are used for illustrative purposes and not intended to limit the present disclosure. 
     Further, the door plate  91  is a rectangular plate body. The door frame  90  comprises vertical hollow rod bodies  90   a  arranged at the left and right sides of the door plate  91 , respectively. The lock assembly  2  is buried in one of the rod bodies  90   a , and the operation assembly  3  is disposed on the two rod bodies  90   a  and across the door plate  91  (approximately at the middle of the door plate  91 ). 
     Furthermore, the handle assembly  1 ′ is disposed at the front side of the door plate  91 . The handle assembly  1 ′ comprises a handle structure  1   a  and a plurality of fastening structures  10  arranged on outer surfaces of the two rod bodies  90   a  and engaged with the handle structure  1   a . For example, the handle structure  1   a  comprises a handle portion  11  and a cover portion  12  cooperating with one another. The fastening structure  10  has a positioning portion  10   a  and a base portion  10   b  connected to the positioning portion  10   a . The fastening structures  10  are fastened to the door frame  90  through the positioning portions  10   a , the cover portion  12  is securely connected to the positioning portions  10   a , and the handle portion  11  is displaceably engaged to the base portion  10   b  so as to displace along the front or rear direction (e.g., the arrow direction X) relative to the base portion  10   b . The handle portion  11  and the cover portion  12  cooperatively form a long hollow tube body corresponding to the operation assembly  3 , and the positioning portion  10   a  and the base portion  10   b  are combined into a groove body with an opening of the groove body correspondingly receiving an end portion of the long hollow tube body. The handle assembly  1 ′ has a lot of specific parts, which are well known in the art and detailed description thereof are omitted herein. 
     The operation assembly  3  comprises at least one acting mechanism  3   a ,  3   b  and an interlocking mechanism  3   c  interlocked with the acting mechanism  3   a ,  3   b.    
     In an embodiment, the operation assembly  3  is substantially arranged along the width of the door plate  91  (e.g., in the arrow direction Y) and has two sets of acting mechanisms  3   a ,  3   b  (as shown  FIG.  1 B ). As shown in  FIGS.  2 A and  2 B , a set of the acting mechanism  3   a  has a rotating member  30 , an actuating member  31  connected to the handle portion  11  through such as fastening holes  310 , and a fastening member  32  connected to the cover portion  12  through such as fastening holes  320 . The rotating member  30  has a shaft portion  300  such as a shaft member  303 , and a first arm portion  301  and a second arm portion  302  connected to different sides of the shaft portion  300 . As such, the shaft portion  300  is connected to the fastening member  32 , the first arm portion  301  is connected to the actuating member  31 , and the second arm portion  302  is connected to the interlocking mechanism  3   c . For example, the rotating member  30  is substantially of a boomerang shape and the fastening member  32  has a pinch shape allowing the interlocking mechanism  3   c  to pass therethrough. The set of the acting mechanism  3   b  has substantially the same configuration. 
     The interlocking mechanism  3   c  has an interlocking member  33  connected to the acting mechanism  3   a  (the second arm portion  302  thereof), an inactive member  35  connected to one end of the interlocking member  33 , and a connecting member  34  connecting the acting mechanism  3   b  (the second arm portion  302  thereof) and the other end of the interlocking member  33 . Therefore, the second arm portions  302  of the two sets of the acting mechanisms  3   a ,  3   b  are connected to the interlocking member  33  and the connecting member  34 , respectively, so as to interlock the acting mechanisms  3   a ,  3   b . For example, the interlocking member  33  and the connecting member  34  are both rod bodies, the right side of the inactive member  35  is connected to the interlocking member  33  and the left side of the inactive member  35  is displaceably disposed on the positioning portion  10   a . The inactive member  35  has a first groove  350  formed on the left side thereof and the positioning portion  10   a  has a bump  100  corresponding to the first groove  350  so as to allow the inactive member  35  to displace relative to the positioning portion  10   a.    
     As shown in  FIGS.  2 B and  2 C , the lock assembly  2  comprises a lock body  2   a  disposed inside the door frame  90  and at least one assembling structure  2   b  for fastening the lock body  2   a  inside the door frame  90 . The lock body  2   a  has a housing structure  20 , a driving member  21  connected to the inactive member  35 , an acting member  22  connected to the driving member  21 , an active member  23  arranged on the housing structure  20 , a main lock member  24  arranged on the housing structure  20 , an auxiliary lock member  25  arranged on the housing structure  20 , and a carrier structure  26  fastened on the housing structure  20  and connected to the main lock member  24  and the auxiliary lock member  25  in a manner that the main lock member  24  and the auxiliary lock member  25  are displaceable relative to the carrier structure  26 . 
     In an embodiment, the housing structure  20  has a main housing  20   a  positioned on the left side thereof and configured with the main lock member  24  and the auxiliary lock member  25 , and a first plate body  20   b  and a second plate body  20   c  disposed on the front and rear sides of the main housing  20   a  and configured with the active member  23 . The driving member  21  is a shaft body, which passes through the first plate body  20   b  and extends into the positioning portion  10   a . As such, two ends of the driving member  21  are connected to the inactive member  35  and the acting member  22 , respectively. For example, one end portion of the driving member  21  has a sliding portion  210  (as shown in  FIG.  2 B ) extending therefrom and displaceably connected to the inactive member  35  (the second groove  351  of the inactive member  35 ), and the other end portion of the driving member  21  is securely connected to the acting member  22  so that the inactive member  35  can drive the acting member  22  to swing. The acting member  22  is of a spoon shape, which has a spoon body  220  engaged on the end portion of the driving member  21  so that a handle portion  221  of the acting member  22  can swing about the end portion of the driving member  21  as an axis. 
     Further, the active member  23  is displaceably disposed on the first plate body  20   b  and the second plate body  20   c  and securely connected to the main lock member  24 . As shown in  FIG.  2 D , the active member  23  has a displacement portion  230  displaceably disposed on the first plate body  20   b  and the second plate body  20   c  (e.g., through sliding grooves  200  of  FIG.  2 B ), a force bearing portion  231  disposed on the displacement portion  230 , a fastening portion  232  disposed on the displacement portion  230  and securely connected to the main lock member  24 , and a driving portion  233  interlocked with the auxiliary lock member  25 . As such, when swinging, the handle portion  221  of the acting member  22  hooks and causes the force bearing portion  231  to displace and hence causes the displacement portion  230  to displace linearly along the sliding grooves  200 , thereby allowing the fastening portion  232  to displace together with the main lock member  24 . Meanwhile, the driving portion  233  drives the auxiliary lock member  25  to displace. 
     Further, the carrier structure  26  is a sheet body, which is engaged with engaging grooves  201  of the first plate body  20   b  and the second plate body  20   c  through a plurality of engaging bars  260  so as to be fastened onto the housing structure  20 , and connected to the main lock member  24  and the auxiliary lock member  25  through a plurality of elastic elements  240 ,  250  such as springs, respectively. As such, the main lock member  24  and the auxiliary lock member  25  can extend out of or retract into the main housing  20   a.    
     Further, the assembling structures  2   b  are fastened onto the main housing  20   a  of the housing structure  20  so as to be connected to the door frame  90 . There is no limit on the type of the assembling structures  2   b.    
       FIGS.  3 A and  3 B  illustrate operation of the door lock device  1  according to the present disclosure. As shown in  FIG.  3 A , the user pushes the handle portion  11  with a pushing force P (as shown in  FIG.  1 A ). As such, the handle portion  11  pushes the actuating members  31  of the acting mechanisms  3   a ,  3   b  (as shown in  FIGS.  2 A and  2 B ) so as to drive the rotating members  30  to rotate. Therefore, the second arm portions  302  drive the interlocking member  33  and the connecting member  34  to moves linearly in a direction away from the lock assembly  2  (e.g., in an acting direction F 1  of  FIG.  3 A ), thus causing the inactive member  35  to move in a direction away from the main housing  20   a  (as shown in  FIGS.  3 A and  3 B ). 
     At this point, the sliding portion  210  of the driving member  21  is pushed to move upward along the second groove  351 , thereby driving the spoon body  220  of the acting member  22  to swing. Hence, the handle portion  221  of the acting member  22  swings in a direction away from the main housing  20   a  (in an acting direction R of  FIG.  3 A ′) so as to hook and cause the force bearing portion  231  of the active member  23  to displace (as shown in  FIG.  3 B ′). Accordingly, the displacement portion  230  displaces linearly in a direction away from the main housing  20   a  along the sliding grooves  200  of the first plate body  20   b  and the second plate body  20   c  (in an acting direction L of  FIG.  3 A ′), thus causing the fastening portion  232  to displace. Therefore, the main lock member  24  and the auxiliary lock member  25  compress the elastic elements  240 ,  250  in a direction toward the inside of the housing structure  20  (in an acting direction F 2  of  FIGS.  3 A and  3 A ′) and retract into the housing structure  20 . 
     After the user releases the handle portion  11 , the operating assembly  3  returns to the original position (as shown in  FIG.  3 A ) so as to cause the lock assembly  2  to return to original shape (as shown in  FIG.  3 A ). 
     Therefore, the door lock device  1  of the present disclosure allows the lock assembly  2  to be buried in the door frame  90  through cooperation of the driving member  21 , the acting member  22  and the active member  23 , thereby protecting the lock assembly  2  from being damaged or stolen. 
     The above-described descriptions of the detailed embodiments are to illustrate the preferred implementation according to the present disclosure, and it is not to limit the scope of the present disclosure. Accordingly, all modifications and variations completed by those with ordinary skill in the art should fall within the scope of the present disclosure defined by the appended claims.