AU2015101583A4 - Locking device implementing multiple locked states for a door - Google Patents

Abstract

Abstract A locking device capable of implementing a plurality of locked states for a door, comprising a lock housing, a lock core positioned on the lock housing, and a lock bolt capable of locking the door, wherein the lock core is provided with a rotatable shifting fork, wherein the lock housing is provided with a first opening corresponding to the lock bolt; characterized by, further comprising: a locking member, being movably provided and capable of transmitting a rotational motion of the shifting fork to conditionally lock the lock bolt, the lock bolt being provided with a locking portion capable of binding the locking member; wherein a first groove capable of binding the shifting fork is provided at a rear location of the locking member, wherein the shifting fork extends to the first groove to drive the locking member to move during the rotation motion of the shifting fork; a shifting arm, being rotatably provided beside the locking member and capable of binding an internal knob, wherein a head end arm body of the shifting arm binds the locking member to drive the locking member to move when rotating the shifting arm; a hook arm, having a hook-shaped hook portion at a head end, the hook portion being provided with a stop projection, the shifting fork being able to bind to the hook portion; wherein the hook arm is rotatably provided and binds a first reset spring to be driven by the first reset spring to press against the shifting fork, so that when the shifting fork is rotated to the location of the stop projection, the stop projection is able to temporarily limit the shifting fork to achieve a first locked state, when the shifting fork continues rotating, the shifting fork passes beyond the stop projection to achieve a second locked state; wherein the hook arm is further provided with a positioning portion, the locking member is further provided with a locking portion adapted to the positioning portion, wherein in the second locked state, the first reset spring drives the positioning portion and the locking portion to be bound together, preventing the locking member being reversely retracted by the shifting arm. St2.1 A-3 3, ---- 115/ 44. .3 1) 9N 4-,4 tii Fig. 1

Description

LOCKING DEVICE IMPLEMENTING MULTIPLE LOCKED STATES FOR A DOOR Technical Field [0001] The present invention relates to a lock body, in particular, relates to a lock capable of implementing two or more locked states for a door. In a first locked state, the door can be opened by rotating a door handle in the situation of rotating an internal knob. In a second locked state, a lock bolt is completely locked. It is not possible to open the door by rotating the door handle both inside and outside the door, but can only open the door by a key. In a third locked state, the lock bolt is not locked, and the door can be opened by freely rotating internal and external door handles. Background [0002] Existing door locks generally have two working states. The first working state is that the lock bolt is not locked, and the door can be opened by freely rotating the internal and external door handles. The first working state is usually also referred to as a windproof function. The second working state is that after being locked by the internal knob or a lock core, the door cannot be opened by rotating the handle inside and outside the door. However, the limitations in the function of the lock body with this structure are apparent. For example, when adults are out of home and the elderly or children is at home, it is not desired to allow others, except family members holding the key, to freely enter the room. At the same time, it is also desired that the elderly or children can freely open the door. Therefore, it is necessary to further improve the structure of the exiting lock body to provide more functions. Summary [0003] The present invention provides a locking device capable of implementing a plurality of locked states for a door. The locking device includes a lock housing, a lock core positioned on the lock housing, and a lock bolt capable of locking the door. A rotatable shifting fork is provided on the lock core. A first opening corresponding to the lock bolt is provided on the lock housing. The invention is characterized by further comprising: [0004] A locking member movably provided and capable of transmitting rotational motion of the shifting fork to conditionally lock the lock bolt. The lock bolt is provided with a locking portion for bonding with the locking member. A first groove capable of bonding with the shifting fork is provided at the rear position of the locking member. The shifting fork extends to the first groove so as to be capable of driving the locking member to move during the rotational motion of the shifting fork. [0005] A shifting arm rotationally provided at the side of the locking member and capable of binding an internal knob. The head end of the arm body of the shifting arm bonds the locking member, so as to be capable of driving the locking member to move when rotating the shifting arm. [0006] A hook arm having a hook-shaped hook portion at the head end. The hook portion is provided with a stop projection. The shifting fork is capable of bonding to the hook portion. The hook arm is rotationally located and bonding a first reset spring, so as to be capable of holding against the shifting fork when driven by the first reset spring. When the shifting fork is rotated to the location of the stop projection, the stop projection can temporarily limit the shifting fork so as to achieve a first locked state. When the shifting fork continues to be rotated, it can pass beyond the stop projection so as to achieve a second locked state. The hook arm is further provided with a positioning portion. The locking member is further provided with a locking portion adapted to the positioning portion. In the second locked state, the first reset spring drives the positioning portion and the locking portion to be bonded, preventing the locking member being reversely retracted by the shifting arm. [0007] According to the above technical solution, the locking device can utilize the shifting fork of the lock core, the hook arm, the shifting arm and the locking member to realize various locking, so as to provide the lock bolt or the locking device with at least two locked states. In particular, the selective first locked state can be formed, so as to achieve ease of use and increase safety of lock usage. [0008] A further embodiment may provide, in the lock housing, a rotatable lock bolt matching member and a second reset spring capable of resetting the lock bolt matching member. The head end of the lock bolt matching member is provided with a connecting arm, wherein the connecting arm connects to the lock bolt by transmission connection. A further embodiment may provide, on the lock bolt, a linkage arm capable of bonding with 2 the connecting arm. The lock bolt forms a transmission connection through the bonding of the linkage arm and the connecting arm. [0009] A further embodiment may be provided, wherein the lock bolt is rotationally provided and is binding with a third reset spring. The side location of the lock bolt is further provided with a side protrusion. The lock housing is provided with an arc-shaped sliding groove adapted with the side protrusion. The side protrusion is housed within the arc-shaped sliding groove. The extension direction of the arc-shaped sliding groove is adapted to the trajectory of the side protrusion. [0010] A further embodiment may be provided, wherein a handle hole bindable with the door handle is provided at the position of the rotating shaft of the lock bolt. [0011] A further embodiment may be provided, wherein the lock bolt is movable in an axial direction. The rotation of the lock bolt matching member is able to drive the lock bolt to be retracted. The lock bolt matching member is provided with a handle hole bindable with the door handle outside the door. [0012] A further embodiment may be provided, wherein the hook arm is located below the locking member. A concave space formed by the hook portion is also located below the first groove. [0013] A further embodiment is provided, wherein an arc-shaped transitional protrusion is provided at the top of the hook portion. The stop projection is located at the inner side of the arc-shaped transitional protrusion. [0014] In a further embodiment, the shifting arm includes a rotating shaft portion and a head end arm body extending from the rotating shaft portion. The shifting arm is rotatably provided on the lock housing through the rotating shaft portion. The locking member is provided with a second groove. The head end arm body of the shifting arm binds the second groove, so as to drive the locking member to move when rotating the shifting arm. [0015] In a further embodiment, the rotating shaft portion of the shifting arm is provided with a binding hold in an axial direction. The internal knob provided inside the door may be inserted into the binding hole so as to drive the shifting arm to be rotated when rotating the internal knob. 3 [0016] In a further embodiment, a stop post is provided at the starting position of the shifting fork. The stop post is positioned on the lock housing. The stop post limits a maximum retraction journey of the shifting fork in a counterclockwise direction. [0017] In a further embodiment, the locking member is provided with a blind hole capable of accommodating a marble group. The marble group includes a spring provided in the blind hole and a marble provided on the spring. The lock housing is correspondingly provided with two marble holes having diameters smaller than the marble. The marble is pressed on one of the marble holes by the spring. [0018] A further embodiment may be a multi-point lock system using the locking device, including a linkage rod, an upper lock body and a lower lock body. A connecting point of the linkage rod passes through a second opening provided on the lock housing and binds onto a socket on the locking member. The upper end and the lower end of the linkage rod are connected to the upper lock body and the lower lock body, respectively, so as to simultaneously drive the upper lock body and the lower lock body to be synchronously locked when the locking member is implementing a locked state. [0019] Due to the above features and advantages, the present invention is applicable to lock products. Brief Description of the Drawings Fig. 1 is an exploded schematic diagram of the structure of a locking device according to the present invention; Fig. 2 is a perspective schematic diagram of the structure of the locking member in the locking device according to the present invention; Fig. 3 is a perspective schematic diagram of the structure of the locking bolt in the locking device according to the present invention; Fig. 4 is a perspective schematic diagram of the structure of the hook arm in the locking device according to the present invention; Fig. 5 is a perspective schematic diagram of the structure of the hook arm shown in Fig. 4 viewed from an opposite direction; Fig. 6 is a schematic diagram of the structure of the lock housing installed with the lock bolt and the hook arm in the locking device according to the present invention; 4 Fig. 7 is a schematic diagram showing the structure after a further installation of the lock core, the locking member and the shifting arm on the basis of Fig. 6, wherein the locking member shown in the figure binds and locks the lock bolt. Fig. 8 is a structural schematic diagram showing the positional relationship of dragging the locking member to be separated from the locking bolt to release the locked state, when reversely rotating the lock core to the starting position on the basis of Fig. 7. Secondly, a lock hook used in conjunction with the lock bolt is provided outside the door leaf where the locking device is located; Fig. 9 is a schematic diagram showing, on the basis of Fig. 8, a process where a hook body of an opposite lock hook enters into the lock housing, when the door leaf is moved to the location of a door frame or to the location of an opposite door leaf; Fig. 10 is a structural schematic diagram showing, on the basis of Fig. 9, the hook body of the lock hook completely enters into the lock housing and forms a third locked state with the lock bolt; Fig. 11 is a structural schematic diagram showing, on the basis of Fig. 10, the locking member locks the lock bolt to form a first conditional locked state by the lock bolt, when rotating the shifting fork using a key and forming a hooked state by the shifting fork and the hook arm; Fig. 12 is a structural schematic diagram showing a second locked state formed by a further rotation of the shifting fork on the basis of Fig. 11; Fig. 13 is a structural schematic diagram of the locking device of the present invention applied to a door lift with multi-point locking structure. Detailed Description [0020] In the following description, structures of a locking device according to the present invention are further described with reference to Fig. 1 to Fig. 13. It is to be noted that the terms "left", "right", "up", "down", "clockwise", or "counterclockwise" etc. described in various embodiments of the invention, are used to define relative orientations or directions for convenience of explaining the structure of the embodiments only. [0021] A locking device 100 is capable of implementing a plurality of locked states for a door. In an embodiment, the locking device 100 is embedded in a translational 5 movable door leaf, so as to bind a lock hook 2 provided on the door frame or on the opposite door leaf to form a locked state of the door leaf. [0022] As shown in Fig. 1, the locking device includes a lock housing 1. The lock housing 1 includes a face cover 11, a bottom cover 12 and a side cover 13. The face cover 11, the bottom cover 12 and the side cover 13 form a complete outer shell through screw positioning. The side cover 13 is provided with a first opening 131 for a hook body 21 of the outside lock hook 2 to enter into the lock housing 1 so as to bind with the lock bolt 3. [0023] As shown in Fig. 1, the lock housing is further provided with the lock bolt 3, a locking member 4, a hook arm 5 and a shifting arm 7. The face cover 11 is provided with a positioning hole 115 for positioning the lock core 6. The bottom cover 12 is also provided with a corresponding positioning hole 125 correspondingly. The locking core 6 is positioned on the face cover 11 and the bottom cover 12 through a screw 62. As shown in Fig. 7 and Fig. 8, the lock core 6 is further provided with a shifting fork 61 rotatable with a key and a lock cylinder. [0024] As shown in Fig. 1, a lock bolt matching member 32 is further provided in the lock housing 1. A hook-shaped connecting arm 321 is provided at the head end of the lock bolt matching member 32. The face cover 11 is provided with a positioning hole 112 for positioning an end of a rotating shaft 39 of the lock bolt matching member 32. The bottom cover 12 is correspondingly provided with a corresponding positioning hole 122 for positioning the other end of the rotating shaft 39 of the lock bolt matching member 32. The rear end of the lock bolt matching member 32 is rotatably provided and covered on the rotating shaft 39, so as to be positioned between the face cover 11 and the bottom cover 12. Secondly, a second reset spring 33 capable of driving the lock bolt matching member 32 to be reset is further provided in the lock housing 1. In more detail, the second reset spring 33 is provided around the rear end of the lock bolt matching member 32. One end arm of the second reset spring 33 is pressed against the lock housing 1, and the other end is pressed against a boss 322 on the lock bolt matching member 32. [0025] As shown in Fig. 1, Fig. 3 and Fig 6, the lock bolt 3 has a rear rotating shaft portion 30. A handle hole 35 allowing an external handle to pass through and a linkage arm 34 are provided on the rear rotating shaft portion 30. The lock bolt 3 forms a hook connected transmission connection structure through the bonding of the linkage arm 34 6 and the connecting arm 321. Of course, a direct-connected transmission connection structure may also be adopted between the linkage arm 34 and the connecting arm 321, as long as a rotational torque of the linkage arm 321 can be transmitted to the lock bolt 3. Secondly, a hook portion 38 is provided at the top of the lock bolt 3. The hook portion 38 is used to hook the hook body 21 of the lock hook 2 to lock the door leaf. Side protrusions 36 are provide at the two side edge locations of the top end of the lock bolt 3, respectively. The second arc-shaped sliding grooves (113, 123) adapted to the side protrusions 36 are provided on the face cover 11 and the bottom cover 12, respectively. The side protrusions 36 at the two sides are accommodated within the second arc-shaped sliding grooves (113, 123). The extension direction of the second arc-shaped sliding grooves (113, 123) is adapted to the trajectory of the side protrusions 36. The two ends of the rotating shaft portion 30 of the lock bolt 3 are respectively positioned in the positioning holes (111, 121) respectively provided on the face cover 11 and the bottom cover 12. In this manner, the second arc-shaped sliding grooves (113, 123) not only can guide the side protrusions 36 to provide a stable rotation of the lock bolt 3, but more importantly the binding of the second arc-shaped sliding grooves (113, 123) and the side protrusions 36 can greatly increase the tensile strength of the lock bolt 3 in the axial direction, in other words, can increase the resistance to the axial tension applied to the lock bolt 3 in the axial direction by the hook body 21 of the lock hook 2, and reduce possible damages to the locking device 100 upon external violent force to open the door. [0026] Next, the lock bolt 3 further binds a third reset spring 31. In more detail, as shown in Fig. 1 and Fig. 6, the third reset spring 31 capable of driving the lock bolt 3 to be rotated in a clockwise direction to a reset position is provided between the lock bolt 3 and the lock housing 1. According to the above embodiments, when the door installed with the locking device 100 is approaching the door frame provided with the lock hook 2, the hook body 21 passes through the first opening 131 along the direction shown in Fig. 8 and drives the hook portion 38 to be slightly rotated counterclockwise, and then enters the locking device 100 as shown in Fig. 9. The third reset spring 31 then drives the lock bolt 3 to turn back to the original position and binds with the hook portion 38 according to the location shown in Fig. 10, so as to make the locking device 100 achieve the third locked state (the first and the second locked state will be described below). When using the external handle to drive the lock bolt 3 to be rotated in the counterclockwise direction, the 7 hook portion 38 of the lock bolt 3 can release the hook body 21 of the lock hook 2 bound through hook connection. The lock hook 2 can leave the locking device 100 in the directions shown from Fig. 10 to Fig. 9 and then to Fig. 8, so as to unlock the third locked state. Further, the lock bolt matching member 32 can alleviate the inertia force of the clockwise rotation of the lock bolt 3, and increase the elasticity of the hook body 21 of the lock hook 2 entering into the locking device 100. [0027] The lock bolt 3 is further provided with a side concave portion 37 for binding a head end 48 of the locking member 4 described below. Accordingly, the side concave portion 37 forms a locking portion of the lock bolt 3. [0028] As shown in Fig. 1 and Fig. 2, the locking member 4 is in rod-shape as a whole and is movably provided, and is able to transmit rotational motion of the shifting fork so as to conditionally lock the lock bolt. The locking member 4 has a rod-shaped head end 48, and is provided with the first groove 41 capable of binding to the shifting fork 61 inside the rear location of the locking member 4. The shifting fork 61 extends to the first groove 41 so as to be able to drive the locking member 4 to move towards the lock bolt 3 during the clockwise rotational motion of the shifting fork 61, and drive the locking member 4 to leave the lock bolt 3 during the counterclockwise rotational motion of the shifting fork 61. To limit the maximum location of the reverse rotation (i.e. counterclockwise direction) of the shifting fork 61, a stop post 8 is provided on the lock housing 1. The stop post 8 limits a maximum retraction journey of the shifting fork 61 in the counterclockwise direction. [0029] In order to make the locking member 4 move stably, protrusions (46, 461, 462) are respectively provided at three locations of the locking member 4. On the lock housing 1 are provided with straight sliding grooves (117, 127) adapted to the protrusion 46, straight sliding grooves (116, 126) adapted with the protrusion 462, and a straight sliding groove (128) adapted to the protrusion 461, so that these straight sliding grooves can guide the left and right movement of the locking member 4. [0030] To provide at least two anchor points for the locking member 4, the face cover 11 is further provided with two marble holes (A, B), and the locking member 4 is provided with a blind hole 42 capable of receiving a marble group. The marble group includes a spring 43 provided in the blind hole 42 and a marble 44 provide on the spring 8 43.The diameters of the two marble holes are smaller than that of the marble 44. Accordingly, the marble 44 can be pressed against one of the two marble holes (A, B) by the spring 43. [0031] On the other side of the locking member opposite to the first groove 41 is provided a pit-shaped locking portion 49 for binding the positioning portion 55 of the hook arm 5 described below to lock the locking member 4. [0032] A shifting arm 7 is further provided beside the locking member 4. The shifting arm 7 has a rotating shaft portion 72 and a head end arm body 71 extending from the rotating shaft portion 72. The shifting arm 7 is rotationally provided on the positioning holes (114, 124) provided on the lock housing 1 through the rotating shaft portion 72. The rotating shaft portion 72 of the shifting arm 7 is provided with a binding hole 70 in an axial direction. An internal knob provided inside the door can be inserted into the binding hole 70, so as to drive the shifting arm to be rotated when rotating the internal knob. The locking member 4 is provided with a second groove 47. The head end arm body 71 of the shifting arm 7 binds in the second groove 47, so as to drive the locking member 4 to move when rotating the shifting arm 7. [0033] The hook arm 5, as shown in Fig. 1 and Figs. 4-6, has a hook-shaped hook portion 58 at the head end, so as to form a concave space 50 approximate to an arc shape. The hook arm 5 is provided below the locking member 4, and the concave space 50 is approximately located below the first groove 41. The shifting fork 61 can simultaneously extends to the concave space 50 and the first groove 41, and binds the hook portion 58 and the locking member 4. The rear end of the hook arm 5 is provided with a rotating shaft hole 56, and is installed onto a positioning post 52 through the rotating shaft hole 56. The positioning post 52 is positioned on the lock housing 1, so that the hook arm 5 can be rotated around the positioning post 52. A first reset spring 51 is further installed around the positioning post 52. The first reset spring 51 has one end pressed against the lock housing 1 and the other end pressed against the hook arm 5, so that the first reset spring 51 can drive the hook arm to be rotated in the clockwise direction, and the first reset spring 51 drives the hook arm 5 to press against the shifting fork 61. To make the hook arm rotate smoothly, the lower side surface of the head end of the hook arm 5 is further provided with a projected post 57 oriented towards the lock housing. The bottom 9 cover 12 is further provided with a first arc-shaped sliding groove 129 correspondingly. The projected post 57 is received in the first arc-shaped sliding groove 129, and the extension direction of the first arc-shape sliding groove 129 is adapted to the moving trajectory of the projected post 57. [0034] The hook portion 58 is provided with a stop projection 54 oriented towards the shifting fork 61. The stop projecting 54 projects to the concave space 50, so as to temporarily limit the shifting fork so as to achieve a first locked state when using the key to drive the shifting fork 61 to be rotated to the location of the stop projection 54. When the shifting fork 61 continues to be rotated, it can pass beyond the stop projection 54 so as to achieve a second locked state. The hook arm is further provided with a positioning portion 55 at the head end. The locking member 4 is further provided with a locking portion 49 adapted to the positioning portion 55. In the second locked state, at the same time that the first reset spring 51 drives the hook arm 5 to rotate in the clockwise direction, the positioning portion 55 enters into the locking portion 49 and binds with each other, preventing the locking member 4 being retracted by reverse rotation of the shifting arm. The stop projection 54 may be located at the tail end of the hook portion 58, or may be located at the non-tail location of the hook portion 58 as in the embodiment shown in Fig. 4. For this reason, as shown in Fig. 4, the top end of the hook portion 58 is further provided with an arc-shaped transitional protrusion 541. The stop projection 54 is located at the inner side of the arc-shaped transitional protrusion 541. Accordingly, when the shifting fork 61 returns counterclockwise from the second locked state, the arc-shaped transitional protrusion 541 is able to allow the shifting fork 61 to return and glide smoothly due to its arc-shaped outer surface. [0035] According to the above technical solution, after installing the components of the lock bolt 3, the lock bolt matching member 32, the third reset spring 33, the second reset spring 31, the locking member 4, the hook arm 5, the first reset spring 51, the lock core 6, the shifting arm 7, the stop post 8, etc. according to the order shown from Fig. 6 to Fig. 7, the shifting fork 61 is located at the starting position as shown in Fig. 8. At this time, the head end 48 of the locking member 4 and the side concave portion 37 of the lock bolt 3 are separated from each other, and the lock bolt 3 can directly receive the hook body 21 of the lock hook 2, thereby forming the third locked state for the door leaf. In this state, people from inside and outside of the door can release the locked state to open the 10 door leaf by directly driving the lock bolt 3 to rotate counterclockwise via the door handle directly. Further, at this time the marble 44 provided on the locking member 4 is pressed on the marble hole B by the spring 43. [0036] When inserting the key into the lock core 6 to drive the shifting fork 61 to rotate from the starting position in the clockwise direction, not only the hook arm 5 can be driven to be slightly rotated counterclockwise, but the locking member 4 can be driven to move towards the lock bolt 3. At this time, the shifting arm 7 is rotating accordingly, and the marble 44 is also gliding accordingly. When using the key to drive the shifting fork 61 to rotate to the location of the stop projection 54, the key can be pull out as shown in Fig. 11 to complete the first locking. The marble 44 provided on the locking member 4 is pressed on the marble hole A by the spring 43. The stop projection 54 can temporarily limit the shifting fork 61 to stop it from moving on. The head end 48 of the locking member 4 is inserted into the side concave portion 37 of the lock bolt 3 to lock the lock bolt 3 and stop the lock bolt 3 from rotating counterclockwise. At this time, even rotating the door handle linked with the lock bolt 3 cannot make the lock bolt 3 rotate counterclockwise to open the door. If a person in the room wishes to come out, he can make the shifting arm 7 rotate reversely by rotating an internal knob inside the door so as to drive the locking member 4 to retract reversely. The locking member 4 in turn drives the shifting fork 61 to retract along with the locking member 4. The head end 48 leaves the side concave portion 37 of the lock bolt 3 so as to release the locking of the lock bolt 3, and the person in the room can open the door by rotating the door handle again. At this time a person outside the room can certainly open the door through the key as well. This state is the first locked state formed for the door, i.e., conditionally implementing locking of the lock bolt 3 to form the first locked state for the door. In this state, pulling out the key from the lock core would not make the shifting fork 61 retract along with the action of pulling out the key. According to the above embodiments, it is also found that rotating the internal knob inside the door can also drive the locking member to move forward to the side concave portion 37 of the lock bolt 3 through the shifting arm 7, so as to realize the locking of the lock bolt 3. [0037] When inserting the key into the lock core 6 to drive the shifting fork 61 to continue rotating beyond the location of the stop projection 54 so as to be separate from the hook arm 5, i.e., at the location shown in Fig. 7 and Fig. 12, the key can be pulled out 11 to complete the second locking. The hook arm 5 is driven by the first reset spring 51 to be completely pushed to the right location. At this time, the positioning portion 55 on the hook arm 5 binds together with the locking portion 49. The head end 48 of the locking member 4 is inserted again into the side concave portion 37 of the lock bolt 3 so as to lock the lock bolt 3 to stop the lock bolt 3 from rotating counterclockwise. The positioning portion 55 can prevent the locking member 4 from being retracted reversely by the shifting arm 7 or the internal knob. At this time, no matter inside or outside of the door, when it can only use the key to reversely drive the shifting fork 61 to rotate back in the reverse direction, the shifting fork 61 drives the hook arm 5 to rotate towards the left to make the positioning portion 55 and the locking portion 49 separated from each other, and to further drive the locking member 4 to be reversely retracted and leave the lock bolt 3. In other words, the key must be used to open the door from inside and outside of the door. This is the second locked state for the door formed by completely locking the lock bolt 3, i.e., another locked state formed for the door by conditionally locking the lock bolt 3. [0038] In a further embodiment (not shown in figures), the lock bolt 3 may further to changed to a structure moved in an axial direction (i.e. along the direction of the first opening 131). In a structure wherein the lock bolt 3 is provided to be axial movable, the lock bolt 3 can not only be extended or retracted in the first opening 131, but the handle hole binding with the external door handle is provided on the lock bolt matching member 32 instead of on the lock bolt 3. In this manner, the lock bolt matching member 32 can be driven to be rotated when rotating the door handle, and the rotated lock bolt matching member 32 can drive the lock bolt to be moved in the axial direction so as to lock the door. [0039] A further embodiment may be shown in Fig. 13, wherein the locking device 100 of the present application may further be applied to a multi-point lock system. Fig. 13 illustrates that the locking device 100 is connected with a linkage rod 103. A connecting point of the linkage rod 103 passes through a second opening 120 provided on the lock housing 1 and binds onto a socket 45 provided on the locking member 4 as shown in Fig. 1. Further, the upper end and the lower end of the linkage rod 103 are connected to lock bolt driving members of an upper lock body 101 and a lower lock body 102, respectively, so as to simultaneously drive the lock bodies (101, 102) to be locked synchronously when 12 the locking member 4 is implementing a locked state. The upper lock body 101 and the lower lock body 102 may also be referred to as auxiliary lock bodies, which have relatively simple structure and can also form a locked state with mechanism of the opposite door leaf or the door frame. 13

Claims (12)

1. A locking device capable of implementing a plurality of locked states for a door, comprising a lock housing, a lock core positioned on the lock housing, and a lock bolt capable of locking the door, wherein the lock core is provided with a rotatable shifting fork, wherein the lock housing is provided with a first opening corresponding to the lock bolt; characterized by, further comprising: a locking member, being movably provided and capable of transmitting a rotational motion of the shifting fork to conditionally lock the lock bolt, the lock bolt being provided with a locking portion capable of binding the locking member; wherein a first groove capable of binding the shifting fork is provided at a rear location of the locking member, wherein the shifting fork extends to the first groove to drive the locking member to move during the rotation motion of the shifting fork; a shifting arm, being rotatably provided beside the locking member and capable of binding an internal knob, wherein a head end arm body of the shifting arm binds the locking member to drive the locking member to move when rotating the shifting arm; a hook arm, having a hook-shaped hook portion at a head end, the hook portion being provided with a stop projection, the shifting fork being able to bind to the hook portion; wherein the hook arm is rotatably provided and binds a first reset spring to be driven by the first reset spring to press against the shifting fork, so that when the shifting fork is rotated to the location of the stop projection, the stop projection is able to temporarily limit the shifting fork to achieve a first locked state, when the shifting fork continues rotating, the shifting fork passes beyond the stop projection to achieve a second locked state; wherein the hook arm is further provided with a positioning portion, the locking member is further provided with a locking portion adapted to the positioning portion, wherein in the second locked state, the first reset spring drives the positioning portion and the locking portion to be bound together, preventing the locking member being reversely retracted by the shifting arm. 14

2. The locking device according to claim 1, wherein: within the lock housing is provided a rotatable lock bolt matching member and a second reset spring capable of resetting the lock bolt matching member, the lock bolt matching member is provided with a connecting arm, the connecting arm being connected to the lock bolt by transmission connection.

3. The locking device according to claim 2, wherein: The lock bolt is rotatably provided and binding a third reset spring; a side location of the lock bolt is further provided with a side protrusion, the lock housing is provided with an arc-shaped sliding groove adapted with the side protrusion, the side protrusion is housed within the arc-shaped sliding groove, an extension direction of the arc-shaped sliding groove is adapted to a trajectory of the side protrusion.

4. The locking device according to claim 3, wherein: a handle hole bindable with a door handle is provided at the position of a rotating shaft of the lock bolt.

5. The locking device according to claim 2, wherein: the lock bolt is movably provided in an axial direction, the rotation of the lock bolt matching member is able to drive the lock bolt to be retracted, the lock bolt matching member is provided with a handle hole bindable with a door handle outside the door.

6. The locking device according to any one of claims 1 to 5, wherein: the hook arm is located below the locking member, and a concave space formed by the hook portion is located below the first groove. 15

7. The locking device according to any one of claims 1 to 5, wherein: an arc-shaped transitional protrusion is provided at the top of the hook portion, the stop projection is located at an inner side of the arc-shaped transitional protrusion.

8. The locking device according to any one of claims 1 to 5, wherein: the shifting arm has a rotating shaft portion and a head end arm body extending from the rotating shaft portion, the shifting arm is rotatably provided on the lock housing through the rotating shaft portion; the locking member is provided with a second groove, the head end arm body of the shifting arm binds into the second groove, so as to drive the locking member to move when rotating the shifting arm.

9. The locking device according to claim 8, wherein: the rotating shaft portion of the shifting arm is provided with a binding hold in an axial direction, the internal knob provided inside the door can be inserted into the binding hole so as to drive the shifting arm to be rotated when rotating the internal knob.

10. The locking device according to any one of claims 1 to 5, wherein: a stop post is provided at a starting position of the shifting fork, the stop post is positioned on the lock housing, the stop post limits a maximum retraction journey of the shifting fork in a counterclockwise direction.

11. The locking device according to any one of claims 1 to 5, wherein: the locking member is provided with a blind hole capable of accommodating a marble group, the marble group includes a spring provided in the blind hole and a marble provided on the spring, the lock housing is correspondingly provided with two marble holes having diameters smaller than the marble, the marble is pressed on one of the marble holes by the spring. 16

12. A multi-point lock system including the locking device according to any one of claims 1 to 11, comprising a linkage rod, an upper lock body and a lower lock body, wherein a connecting point of the linkage rod passes through a second opening provided on the lock housing and binds onto a socket on the locking member, wherein an upper end and a lower end of the linkage rod are connected to the upper lock body and the lower lock body, respectively, so as to simultaneously drive the upper lock body and the lower lock body to be synchronously locked when the locking member is implementing a locked state. 17