Lock with emergency unlocking feature

Abstract

A lock with an emergency unlocking feature includes a latch bolt, a top rotation member, a restriction plate and a driving member. The driving member is connected to the deadbolt. When the top rotation member is rotated from a close position to an open position while the lock is locked, a restriction member drives the restriction plate to press a resilient unit. The restriction plate is moved to disengage the engaging member on the restriction plate from the second notch of the driving member. The guide slot of the transmission plate pulls the second guide member to move the deadbolt to the unlocked position, and the latch bolt moves to the open position. When in an emergency situation, the user rotates the handle to retract both of the deadbolt and the latch bolt without using a key to unlock the deadbolt to save time.

Description

BACKGROUND OF THE INVENTION

1. Fields of the Invention

The present invention relates to a lock with emergency unlocking feature, and more particularly, to a lock whose deadbolt and latch bolt can both be retracted by rotating either one of the two handles in emergency situations to save time for rescue and people's lives in buildings.

2. Descriptions of Related Art

A conventional escape or emergency door is equipped for emergency use, and prevents unauthorized persons from entering into the buildings. Generally, the emergency door has a lock that includes a latch bolt and a deadbolt, wherein the latch bolt can be operated by operating the handles, and the deadbolt has to be operated by using a key to rotate the core of the lock. Therefore, the emergency door usually is locked from inside of the door such that people cannot open the door by rotating the handle on the outside of the door except for using a correct key. It still require an unlocking device to open the door from the inside of the building without using a key in an emergency situation. However, such locks have a complicated structure and a high price, and become a burden for the users.

The present invention is intended to provide a lock to eliminate the drawbacks mentioned above.

SUMMARY OF THE INVENTION

The present invention relates to a lock which comprises a case having a latch bolt recess, an installation recess, a restriction recess, a core recess and a deadbolt recess defined in sequence in the lateral side thereof. The core recess has a first guide member and defines a loop-like rail. The case has an installation hole defined in the Z-axis thereof and the installation hole is located within the inner bottom of the installation recess. A latch bolt is located in the latch bolt recess and includes a head, a passive member and a spring. The passive member is fixed to the head. The spring biased between inside of the latch bolt recess and the passive member. When in a closed position, the spring extends to protrude the head out from the case. When in an opened position, the spring is compressed and the head does not protrude out from the case. A top rotation member is located in the installation recess and includes a first transmission member, a first hole located corresponding to the installation hole, and a first contact portion. The installation recess includes a first positioning portion located corresponding to the distal end of the latch bolt recess. A first resilient member is connected to the first positioning portion and biases the first contact portion. When the first transmission member is assigned to the top rotation member and is rotated by the top rotation member, the first contact portion compresses the first resilient member and pushes the passive member so that the spring is compressed and the head does not protrude out from the case. When in the closed position, the first resilient member bounces and contacts the first contact portion, the first transmission member does not press the passive member. The top rotation member has a pivotal member which has a transmission plate pivotably connected thereto. A restriction plate has a first guide hole defined therein. The first guide member extends through the first guide hole. The restriction plate has a restriction part. The case having a third positioning wall. A second positioning portion is formed at the inner bottom of the third positioning wall. A resilient unit is located in the third positioning portion and biased between the restriction plate and the bottom of the third positioning wall. A resilient direction of the resilient unit is correspondent to the first guide hole. The restriction plate includes at least one engaging member. The bottom of the restriction plate is located on the rail. A driving member has one end thereof fixed to a deadbolt, and the deadbolt is movable within the deadbolt recess. The driving member has a slide slot in which the first guide member is slidably received therein. The driving member has a second guide member on one end face thereof. The driving member includes a first notch and a second notch defined in the top thereof. The first and second notches are located corresponding to the at least one engaging member. The at least one engaging member has a third notch defined in the underside thereof. The transmission plate includes a guide slot to which the second guide member is mounted. The transmission plate includes an engaging recess located corresponding to the restriction part which has a space that is larger than the restriction part. The engaging recess includes an inclined guide face which is located corresponding to a position where the restriction part compresses the resilient unit. The third notch is located at the rail. When in a locked position, the deadbolt protrudes beyond the deadbolt recess. The first guide member is located in one end of the slide slot and located opposite to the deadbolt. The at least one engaging member is engaged with the second notch. The top rotation member is located at the closed position. When in an unlocked position, the deadbolt is located in the deadbolt recess. The at least one engaging member is engaged with the first notch. The first guide member is located in another end of the slide slot. The second guide member is located at the top of the guide slot. When in an opened position, the second guide member is located at a bottom of the guide slot. When at the locked position, the top rotation member is rotated from the closed position to the opened position, the transmission plate operates the restriction part to drive the restriction plate to compress the resilient unit by the guide face. The restriction plate moves to disengage the engaging member from the second notch. The guide slot pulls the second guide member to move the deadbolt to the unlocked position, and the latch bolt moves to the opened position.

Preferably, the lock includes an extension plate which has an end thereof eccentrically and is pivotably connected to the second guide member. The extension plate includes an extension slot which extends toward two opposite extension directions which are located corresponding to the slide slot. The first guide member is slidable within the extension slot. The extension plate is located at the rail.

Preferably, the extension plate includes a concaved portion defined in the lateral side corresponding to the second guide member. The concaved portion and the lateral wall of the concaved portion are located at the rail.

Preferably, the case includes a longitudinal slot defined in one end face thereof and the restriction part slides within the longitudinal slot.

Preferably, the bottom rotation member is located in the installation recess. The bottom rotation member includes a second transmission member. The top rotation member and the bottom rotation member are overlapped with each other and do not drive mutually. The bottom rotation member includes a second transmission member, a second hole which is located corresponding to the installation hole, and a second contact portion. The first resilient member biases first and second contact portions. When the first transmission member and the second transmission member are assigned to the top rotation member or the bottom rotation member, and are rotated, the first contact portion or the second contact portion compresses the first resilient member and pushes the passive member so that the spring is compressed and the head does not protrude out from the case. When in the closed position, the first resilient member bounces and pushes the first contact portion and the second contact portion, the first and second transmission members do not contact the passive member.

Preferably, the latch bolt recess includes a positioning recess, a connection recess and the installation recess defined in communication with each other along the X-axis of the latch bolt recess. A fifth positioning wall is formed on one end of the X-axis of the latch bolt recess. The positioning recess is defined between the fifth positioning wall and the second positioning wall. The case includes a connection groove defined in one end of the fifth positioning wall. A first connector protrudes from another end of the fifth positioning wall. The second positioning wall includes a second connector which is located corresponding to the first connector. The connection recess is defined between the first connector and the second connector. The passive member is engaged with the connection groove and includes a bent portion extending from each of two ends thereof. Each bent portion includes a through hole. The latch bolt includes a shank which extends through the through holes and is connected to the head. The shank includes a positioning ring mounted thereto which is located between the bent portions. The spring is located between the positioning ring and the bent of the head so that the positioning ring is located in the positioning recess and biased by the spring and contacts the first and second connectors.

Preferably, the driving member includes a third guide member. A stop plate is pivotably connected to the third guide member and includes an extension portion which includes a corner. The extension portion includes a rod which is slidable in the elongate groove defined in one end face of the case. When in the locked position, the rod is moved to the top inner end of the elongate groove. When in the unlocked position, the rod is located at the bottom inner end of the elongate groove. The corner is removed from the rail when at the unlocked position.

Preferably, the first resilient member is a torsion spring, and the torsion spring contacts the wall of the installation recess and first and second contact portions.

Preferably, a handle is installed to a first hole of the top rotation member via the installation hole.

Preferably, the core recess includes a core and the core includes a cam which is rotatably along the rail.

The advantages of the present invention are that, the lock includes the transmission plate, the second guide member, the engaging recess and the restriction part. The engaging recess has a space that is larger than the restriction part, and engaging recess includes an inclined guide face. When the deadbolt is in the locked position, by rotating the handle, the transmission plate operates the restriction part to drive the restriction plate to compress the resilient unit by the guide face. The restriction plate moves to disengage the engaging member from the second notch. The guide slot pulls the second guide member to move the deadbolt to the unlocked position, and the latch bolt moves to the opened position. The lock of the present invention can be used on emergency doors so that the latch bolt and the deadbolt can be unlocked and opened by operating the handle on the inside of the door without using the key.

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view to show the first embodiment of the lock of the present invention;

FIG. 2 is an exploded view of the first embodiment of the lock of the present invention;

FIG. 3 is another exploded view of the first embodiment of the lock of the present invention;

FIG. 4 is a right side view, the second part of the case being removed, showing the first and second guiding slots and the longitudinal slot;

FIG. 5 is a left side view with the first part of the case being removed;

FIG. 6 shows that the handle of the top rotation member of the disclosure in FIG. 4 is rotated and in an opened position;

FIG. 7 shows that the handle of the bottom rotation member of the disclosure in FIG. 5 is rotated and in an opened position;

FIG. 8 shows the stop position of the disclosure in FIG. 4;

FIG. 9 shows that the cam in FIG. 4 is rotated to lift the restriction plate;

FIG. 10 shows that the lock in FIG. 9 is operated to the middle position;

FIG. 11 shows that the lock in FIG. 9 is operated to the locked position;

FIG. 12 shows that the cam in FIG. 11 is rotated to lift the restriction plate;

FIG. 13 shows that the lock in FIG. 12 is operated to the middle position;

FIG. 14 shows that the lock in FIG. 13 is transmitted to the cam to push the corner of stop plate;

FIG. 15 shows that the lock in FIG. 4 is transmitted to the cam to push the transmission plate to the opened position;

FIG. 16 shows the lock block of the lock of the present invention;

FIG. 17 is a right side view of the second embodiment of the lock which is located at the first position and shows the bore, with the second part of the case being removed;

FIG. 18 shows the second position of the disclosure in FIG. 17;

FIG. 19 is a right side view with the second part of the case being removed of the third embodiment of the lock of the present invention, and shows the longitudinal slot, wherein the lock is in the locked position;

FIG. 20 shows that the transmission plate in FIG. 19 cooperates with the guide face to let the restriction part drive the restriction plate so that the restriction plate moves to the position where the engaging member is removed from the second notch;

FIG. 21 shows the unlocked position and the opened position of the disclosure in FIG. 20;

FIG. 22 shows another engaging member of the present invention;

FIG. 23 is a right side view of the fourth embodiment of the present invention wherein the second part of the case is remove, and the lock is at the closed position;

FIG. 24 shows that the lock in FIG. 23 is in the locked position;

FIG. 25 shows the roller-type deadbolt in the fifth embodiment of the lock of the present invention;

FIG. 26 is an exploded view of the disclosure of FIG. 25;

FIG. 27 shows that the body in FIG. 25 is removed;

FIG. 28 shows the right side view of the fifth embodiment of the present invention, wherein the second part of the case is removed, and the lock is at the unlocked position and the non-transmission position;

FIG. 29 is a right side view of the locked position of the lock of FIG. 28;

FIG. 30 is a right side view to show that the engaging member, the deadbolt and the core are located at the transmission position in the fifth embodiment of the present invention;

FIG. 31 is a right side view to show that the engaging member, the deadbolt and the core are located at the non-transmission position in the fifth embodiment of the present invention;

FIG. 32 is a top view of the disclosure of the fifth embodiment of the present invention;

FIG. 33 is a right side view of the sixth embodiment of the present invention, wherein the second part of the case is removed;

FIG. 34 is a right side view of the seventh embodiment of the present invention, wherein the second part of the case is removed;

FIG. 35 is a right side view of the eighth embodiment of the present invention, wherein the second part of the case is removed, and

FIG. 36 is a right side view of the ninth embodiment of the present invention, wherein the second part of the case is removed,

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1 to 5, the present invention provides a multiple functions and module replaceable lock, and the lock comprises a case 1 which includes a first part 11 and a second part 12 which is connected to the first part 11 to form the case 1. The case 1 is installed to a door (not shown).

The case 1 includes a latch bolt recess 13, a restriction recess 14 and a deadbolt recess 15 defined in a lateral side from top to bottom of the case 1.

The distal end of the X-axis of the latch bolt recess 13 communicates with an installation recess 16. The installation recess 16 includes a first positioning portion 161 located corresponding to the distal end of the latch bolt recess 13. The case 1 includes an installation hole 162 defined in the Z-axis thereof and located within the installation recess 16. The case 1 includes a first positioning wall 131 formed at the bottom of the latch bolt recess 13. The first positioning wall 131 connects with the second positioning wall 132, and forms a first slot 133. The bottom of the latch bolt recess 13 communicates with the restriction recess 14 via the first slot 133. The distal end of the restriction recess 14 communicates with the installation recess 16. The first slot 133 further includes a first fixing recess 134 and a second fixing recess 135 defined in the second positioning wall 132.

The case 1 includes a core recess 17 defined in the distal end of the X-axis of the deadbolt recess 15, and the core recess 17 communicates with the installation recess 16. The deadbolt recess 15 includes a first guiding slot 151 defined in a wall thereof. The core recess 17 includes a second guiding slot 171 defined in a wall thereof. The core recess 17 includes a third positioning wall 172 on the top thereof, and the third positioning wall 172 includes a first positioning portion 161 on the top thereof. The third positioning wall 172 includes a second positioning portion 173 formed on the bottom thereof. The core recess 17 includes a fourth positioning wall 174 which is located corresponding one end of the third positioning wall 172. The core recess 17 includes an elongate groove 175 defined in one end of the fourth positioning wall 174. A core hole 176 is defined through the inner bottom of the core recess 17 and located along the Z-axis of the core recess 17.

For the arrangement of the first and second parts 11, 12, in one embodiment, a stop wall 177 is located between the deadbolt recess 15 and the core recess 17. The first and second fixing recesses 134, 135, the stop wall 177, the elongate groove 175 and the fourth positioning wall 174 are located in the first part 11. The first and second guiding slots 151, 171 are located in the second part 12. The rest of the components can be installed to the first and second parts 11, 12, but not limited thereto.

The present invention may use different components to be installed to the lock so as to obtain different functions. In the first embodiment, the case 1 has more functions and can be used to the gate door.

Function 1: The Latch Bolt 2 Locking the Lock.

The latch bolt recess 13 includes a latch bolt 2 which includes a head 21, a passive member 22 and a spring 23. The passive member 22 is fixed to the head 21, and the spring 23 is biased between the inside of the latch bolt recess 13 and the passive member 22. When in a closed position, the spring 23 extends to protrude the head 21 out from the case 1. When in an opened position, the spring 23 is compressed so that the head 21 does not protrude out from the case 1. The installation recess 16 includes a top rotation member 24 and a bottom rotation member 25. The top rotation member 24 and the bottom rotation member 25 are overlapped with each other and do not drive each other. The top rotation member 24 includes a first transmission member 241, a first hole 242 located corresponding to the installation hole 162 and a first contact portion 243. The bottom rotation member 25 includes a second transmission member 251, a second hole 252 which is located corresponding to the installation hole 162, and a second contact portion 253. The first positioning portion 161 includes a first resilient member 26 which biases the first contact portion 243. In one embodiment, the first resilient member 26 is a torsion spring, and the torsion spring includes two legs which respectively contact a wall of the installation recess 16 and first and second contact portions 243, 253. The torsion spring provides pivotal force.

In order to control the rotation of the top and bottom rotation members 24, 25, a handle 27 is installed to a first hole 242 and a second hole 252, so that the top and bottom rotation members 24, 25 do not drive mutually. The two respective handles 27 are installed individually and do not drive mutually.

Regarding to the transmission and positioning of the latch bolt 2 and the passive member 22, the latch bolt recess 13 includes a positioning recess 136, a connection recess 137 and the installation recess 16 defined in communication with each other along the X-axis of the latch bolt recess 13. A fifth positioning wall 138 is formed on one end of the X-axis of the latch bolt recess 13. The positioning recess 136 is defined between the fifth positioning wall 138 and the second positioning wall 132. The case 1 includes a connection groove 1381 defined in one end of the fifth positioning wall 138. A first connector 1382 protrudes from the other end of the fifth positioning wall 138. The second positioning wall 132 includes a second connector 1321 which is located corresponding to the first connector 1382. The connection recess 137 is defined between the first connector 1382 and the second connector 1321. The passive member 22 is engaged with the connection groove 1381 and includes a bent portion 221 extending from each of two ends thereof. Each bent portion 221 includes a through hole 222. The latch bolt 2 includes a shank 223 which extends through the through holes 222 and is connected to the head 21. The shank 223 includes a positioning ring 224 mounted thereto which is located between the bent portions 221. The spring 23 is located between the positioning ring 224 and the bent 221 of the head 21 so that the positioning ring 224 is located in the positioning recess 136 and biased by the spring 23 and contacts the first and second connectors 1382, 1321.

The first transmission member 241 is installed as disclosed in FIG. 6 which is a view from inside of the door, when the users rotate the handle 27 and rotates the top rotation member 24, the first transmission member 241 compresses the first resilient member 26 and contacts the passive member 22, so that the spring 23 is compressed and the head 21 does not protrudes out from the case 1. As shown in FIG. 7 which is a view from outside of the door, the second transmission member 251 is installed as disclosed in FIG. 7. When the users rotate the other handle 27 and rotates the bottom rotation member 25, the second transmission member 251 compresses the first resilient member 26 and contacts the passive member 22, so that the spring 23 is compressed and the head 21 does not protrudes out from the case 1. As the head 21 does not protrudes out from the case 1, the lock is in the opened position and the door can be opened. When in the closed position as shown in FIG. 4, the first resilient member 26 bounces back and contacts the first contact portion 243 and the second contact portion 253. The first transmission member 241 and the second transmission plate 251 do not contact the passive member 22. The head 21 of the latch bolt 2 protrudes out from the case 1 and is inserted into the door frame. The door cannot be opened by rotating the handles 27 form inside or from outside.

Function 2: Preventing the Latch Bolt 2 from being Shifted to Open the door.

In order to prevent the latch bolt 2 from being shifted to the opened position to open the door by rotating the handle 27 from outside, or to prevent the latch bolt 2 from being directly shifted to the opened position to open the door from outside, the case 1 has a first restriction member 141 in the restriction recess 14. The restriction recess 14 can be installed to the first part 11 but not limited thereto. The restriction recess 14 includes a restriction bolt 3 which has a restriction member 31 and a slide 32. The slide 32 includes a first shifting recess 321 located corresponding to the first restriction member 141. A transmission block 322 is located on the Z-axis of the slide 32. The slide 32 includes a stop face 323 formed on an end face thereof which is located corresponding to the transmission block 322. The second positioning wall 132 includes a second restriction member 1322 which is pivotably connected to a stop plate 33 which has a pivotal portion 331, a transmission portion 332, a stop portion 333 and a guiding portion 334. The pivotal portion 331 is located between the transmission portion 332 and the stop portion 333, and is pivotably connected to the second restriction member 1322. The transmission portion 332 is located corresponding to the second positioning wall 132, and has a contact portion 3321 protruding toward the first fixing recess 134. The top rotation member 24 includes a push block 244 that is able to be rotated from the closed position to the opened position to push the transmission portion 332. And the push block 244 pushes the stop plate 33 to pivot from a stop position to a non-stop position. The stop portion 333 is located corresponding to the first slot 133 and the fifth positioning wall 138. The guiding portion 334 is located corresponding to the slide 32. The guiding portion 334 includes an inclined second shifting recess 335 and an inclined third shifting recess 336. The transmission block 322 is engaged with the second shifting recess 335, and the first restriction member 141 is engaged with the third shifting recess 336. The first fixing recess 134 includes a second resilient member 34 whose one end contacts the contact portion 3321. The second fixing recess 135 includes a third resilient member 35 whose one end contacts the stop face 323. In one embodiment, the second and third resilient members 34, 35 are both torsion springs to provide pivotal forces.

When in the non-stop position as shown in FIGS. 4 and 5, the third resilient member 35 pushes the restriction member 31 to protrude out from the case 1 via the stop face 323, and makes the transmission block 322 and the first restriction member 141 respectively contact the second and third shifting recesses 335, 336 to let the stop portion 333 not to protrude from the latch bolt recess 13. Alternatively, as shown in FIG. 6, the third resilient member 35 is compressed to make the restriction member 31 not to protrude out from the case 1, and makes the transmission block 322 and the first restriction member 141 are not being pushed. The transmission portion 332 is pushed by the push block 244 of the top rotation member 24 to make the stop portion 333 not to protrude from the latch bolt recess 13. When in the stop position as shown in FIG. 8, the third resilient member 35 is compressed and the restriction member 31 does not protrude out from the case 1. That is to say, the door frame does not have a hole for the restriction bolt 3, and the door frame has a hole that is located corresponding to the latch bolt 2, so that when the door is closed to the door frame, the latch bolt 2 is located at the closed position, and the restriction member 31 does not protrude out from the case 1. The transmission block 322 and the first restriction member 141 are not pushed, and the stop plate 33 is pushed by the recovery force from the second resilient member 34 to pivot the stop plate 33 by the contact portion 3321, so that the stop portion 333 protrudes into the latch bolt recess 13 when in the closed position. The latch bolt 2 cannot be retracted into the latch bolt recess 13 by neither a force applied from outside of the case 1, not by rotating the handle 27 to rotate the bottom rotation member 25 from outside of the door. The only way is to rotate the handle 27 from the inside of the door to let the push block 244 of the top rotation member 24 push the transmission portion 332 to remove the stop portion 333 from the latch bolt recess 13 to shift the latch bolt 2 from the closed position to the opened position.

Function 3: The Locking Feature of the Deadbolt 8.

In order to enhance the locking feature of the deadbolt 8, the core recess 17 includes a first guide member 178, a restriction plate 4, an engaging member 5, an extension plate 6 and a stop plate 7. The core recess 17 includes a core 18 via the core hole 176, the core 18 includes a cam 181 which is rotatable. The range of the rotation of the cam 181 defines a loop-like rail “R”. The core 18 includes a keyhole in each of two ends thereof. A knob may be connected to the core 18 at the inside of the door to directly rotate the cam 181, and the core 18 has a keyhole at the outside of the door for accepting a key inserted therein.

The bottom of the restriction plate 4 is located at the rail “R”. The first guide member 178 extends through a first guide hole 41 defined in the restriction plate 4 so as to balance and restrict the moveable range of the restriction plate 4. A resilient unit 42 is biased between the restriction plate 4 and the bottom of the third positioning wall 172. The resilient unit 42 is connected to the second positioning portion 173 and the resilient direction of the resilient unit 42 is correspondent to the first guide hole 41. The restriction plate 4 includes at least one engaging member 43.

One end of the driving member 5 is connected to the deadbolt 8 which is movable in the deadbolt recess 15 and is stopped by the stop wall 177. The driving member 5 includes a slide slot 51 in which the first guide member 178 extends. The driving member 5 includes a second guide member 52 which is slidable in the first guiding slot 151 and located corresponding to one end face of the restriction plate 4. The driving member 5 includes a first notch 53 and a second notch 54 defined in the top thereof, and the first and second notches 53, 54 are located corresponding to the engaging member 43. The driving member 5 includes a third notch 55 which is located corresponding to the bottom of the deadbolt 8. The driving member 5 includes a third guide member 56 that is located opposite to one end of the deadbolt 8 and one end face of the restriction plate 4, and the third guide member 56 is slidable in the second guiding slot 171 so as to stabilize the transmission direction of the driving member 5.

The extension plate 6 has an end thereof eccentrically and pivotably connected to the second guide member 52, and the extension plate 6 includes an extension slot 61 which extends toward two opposite extension directions which are located corresponding to the slide slot 51. An intermediate point 63 is formed at the turning position where the two opposite extension directions meet. The first guide member 178 slidable within the extension slot 61. The extension plate 6 includes a concaved portion 62 defined in the lateral side corresponding to the second guide member 52.

A stop plate 7 is pivotably connected to the third guide member 56, and the stop plate 7 includes an extension portion 71 which includes a corner 72. The extension portion 71 includes a rod 73 which is slidable in the elongate groove 175 defined in an end face of the case 1.

The top rotation member 24 includes a pivotal member 245 which is pivotably connected to a transmission plate 28. The transmission plate 28 includes a guide slot 281 to which the second guide member 52 is mounted.

When in the locked position, as shown in FIGS. 4 and 9, the cam 181 of the core 18 first pushes the restriction plate 4 upward to compress the resilient unit 42, and the cam 181 contacts the left wall of the third notch 55 of the driving member 5 so that the driving member 5 gradually moves toward left. In the meanwhile, the stop plate 7 is pulled toward the left by the third guide member 56, and the rod 73 is engaged with the elongate slot 175, so that the stop plate 7 is pivoted. The first guide member 178 is located in one of the extension direction of the extension slot 61. As shown in FIG. 10, the first guide member 178 is located at the middle position. Because the extension slot 61 includes two extension directions so that there will be a mediate point 63 at the position where the two extension directions meet. When at the middle position, the deadbolt 8 partially protrudes into the deadbolt recess 15 as mentioned before, and the first guide member 178 is located at the mediate position 63, and the extension plate 6 is located at the rail “R”. When the cam 181 continuously rotates counter clockwise, the cam 181 pivots the extension plate 6 and drives the driving member 5 toward the left. The first guide member 178 moves toward the other direction of the extension slot 61 so that the driving member 5 moves a long distance by one single rotation of the cam 181, and the deadbolt 8 protrudes a long distance as well. The concaved portion 62 is formed to allow the extension plate 6 to be pivoted by the cam 181. In one embodiment, the concaved portion 62 can be omitted and the function can also be proceeded by a specific shape of the extension plate 6. As shown in FIG. 11, after the extension plate 6 is pivoted, the lock is at its locked position, the deadbolt 8 protrudes into the deadbolt recess 15. The cam 181 is disengaged from the restriction plate 4 and the restriction plate 4 is moved to its initial position by recovery force. The engaging member 43 is engaged with the second notch 54 to prevent the deadbolt 8 from being retracted into the deadbolt recess 15 by a force from outside of the case 1. The first guide member 178 is located at one inner end of the extension slot 61 and the slide slot 51 and opposite to the deadbolt 8. The transmission plate 28 is not rotatable by the restriction of the second guide member 52. When rotating the top rotation member 24, because the transmission plate 28 is stopped by the second guide member 52, the top rotation member 24 is located at the closed position, and the rod 73 is moved to the top inner end of the elongate groove 175.

During the process to the unlocked position, as shown in FIGS. 12, 13 and 9 in sequence, the cam 181 rotates clockwise to lift the restriction plate 4 to disengage the engaging member 43 from the second notch 54. The can 181 contacts the right wall of the third notch 55 so that the driving member 5 gradually moves to the left. As shown in FIG. 14, in order to allow the deadbolt 8 to be completely inserted into the deadbolt recess 15, by the corner 72 of the stop plate 7, the cam 181 contacts the corner 72 when returning to the unlocked position, so that the stop plate 7 drives the driving member 5 to let the deadbolt 8 return to the unlocked position as shown in FIG. 4. The corner 72 is then removed from the rail “R”, and the engaging member 43 is engaged with the first notch 53 because the cam 181 is removed from the restriction plate 4. The first guide member 178 is located at the other inner end of the extension slot 61 and the slide slot 51. The second guide member 52 is located at the top inner end of the guide slot 281. By the function 1 mentioned before, the latch bolt 2 moves to the open position by rotating the top rotation member 24, and the second guide member 52 is located at the bottom inner end of the guide slot 281. As shown in FIG. 15, by the rotation of the cam 181 in the unlocked position, the cam 181 pushes the transmission plate 28 upward so as to operate the top rotation member 24. As mentioned before, the latch bolt 2 and the top rotation member 24 are located at the open position.

In one embodiment, the functions 1, 2, and 3 are combined. The lock includes the latch bolt 2, the deadbolt 8 and the restriction bolt 3. The case 1 includes a strike plate 19 which includes a first hole located corresponding to the latch bolt recess 13, a second hole located corresponding to the restriction recess 14, and a third hole located corresponding to the deadbolt recess 15. The latch bolt 2 can be inserted into the first hole, the restriction bolt 3 can be inserted into the second hole, and the deadbolt 8 can be inserted into the third hole. The first, second and third holes of the strike plate 19 may vary according the installation of the latch bolt 2, the restriction bolt 3 and the deadbolt 8 to the lock.

Function 4: Long Travel Distance of the Deadbolt 8.

It is noted that the functions 1, 2 and 3 are described before, wherein the extension plate 6 is mainly used to allow the deadbolt 8 to extend at least 22 mm by one-time rotation of the core 18 to meet the related regulations and improve the shortcoming of the conventional locks which require multiple rotation of the core. The function 4 includes all of the functions 1, 2 and 3. In one embodiment, the case 1 may not be used, other type of case may also be used.

In one embodiment, the following structure and components are required to obtain the function. The present invention provide another embodiment of the lock wherein the deadbolt has a long travel distance by one-time operation.

The lock comprises a case 1 having a core recess 17 and a deadbolt recess 15. An elongate groove 175 is defined in one end face of the case 1. The core recess 17 including a first guide member 178 and defines a loop-shaped rail “R”.

A driving member 5 has an end fixed to a deadbolt 8 which is movably in the deadbolt recess 15. The driving member 5 has a slide slot 51 in which the first guide member 178 is slidably received therein. The driving member 5 has a second guide member 52 on an end face thereof. A third notch 55 is defined in the bottom of the driving member 5. For the deadbolt 8, the case 1 includes a stop wall 177 located between the core recess 17 and the deadbolt recess 15, the deadbolt 8 is movable in the deadbolt recess 15 and stopped by the stop wall 177. The third notch 55 is located at the rail “R”.

An extension plate 6 has an end thereof eccentrically and pivotably connected to the second guide member 52. The extension plate 6 includes an extension slot 61 which extends toward two opposite extension directions which are located corresponding to the slide slot 51. An intermediate point 63 is formed at a turning position where the two opposite extension directions meet. The first guide member 178 is slidable within the extension slot 61. In order to let the cam 181 pushes the extension plate 6 at the middle position, the extension plate 6 includes a concaved portion 62 defined in the lateral side corresponding to the second guide member 52. The concaved portion 62 and a sidewall of the concaved portion 62 are located at the rail “R” when at the middle position.

In order to help the deadbolt 8 to be moved to the unlocked position, in one embodiment, the driving member 5 includes a third guide member 56 on one end face. A stop plate 7 is pivotably connected to the third guide member 56, and the stop plate 7 includes an extension portion 71 which includes a corner 72. The extension portion 71 includes a rod 73 which is slidable in an elongate groove 175 defined in an end face of the case 1.

The lock includes the function 3 that the core 18 drives the deadbolt 8. As shown in FIGS. 4 and 9-14, when in the unlocked position, the deadbolt 8 is located in the deadbolt recess 15, and the first guide member 178 is located in the extension slot 61 and one end of the slide slot 51. The rod 73 is located at the bottom inner end of the elongate groove 175. The corner 72 is removed from the rail “R” when at the unlocked position. When at the middle position, the deadbolt 8 partially protrudes into the deadbolt recess 15, and the first guide member 178 is located at the mediate point 63. The extension plate 6 is located at the rail “R” and can be pushed by the cam 181 to increase the travel distance of the deadbolt 8. When at the locked position, the deadbolt 8 partially protrudes into the deadbolt recess 15, and the extension plate 6 is pivoted by the first guide member 178 so that the first guide member 178 is located in the extension slot 61 and the other end of the slide slot 51 that is located opposite to the deadbolt 8. The rod 73 is located at the inner top end of the elongate slot 175.

In order to prevent the deadbolt 8 from being retracted into the deadbolt recess 15 by a force from outside of the case 1, the restriction plate 4 as mentioned before can be installed. The operation and function will not be repeated here.

If the lock with the long travel distance of the deadbolt can be unlocked from operation of the handle 27 located the inside of the case 1, the case 1 includes a latch bolt recess 13 and an installation recess 16. The case 1 includes an installation hole 162 defined in the Z-axis of the installation recess 16. The latch bolt recess 13 includes a latch bolt 2 which includes a head 21, a passive member 22 and a spring 23. The passive member 22 is fixed to the head 21. The spring 23 is biased between the inside of the latch bolt recess 13 and the passive member 22. When in a closed position, the spring 23 extends to protrude the head 21 out from the case 1. When in an opened position, the spring 23 is compressed so that the head 21 does not protrude out from the case 1. The installation recess 16 includes a top rotation member 24 which includes a first transmission member 241, a first hole 242 located corresponding to the installation hole 162, and a first contact portion 243. The installation recess 16 includes a first positioning portion 161 located corresponding to the distal end of the latch bolt recess 13. The first positioning portion 161 includes a first resilient member 26 which biases the first contact portion 243. When the first transmission member 241 is assigned to the top rotation member 24 and is rotated by the top rotation member 24, the first contact portion 243 compresses the first resilient member 26 and pushes the passive member 22 so that the spring 23 is compressed and the head 21 does not protrude out from the case 1.

In another embodiment, if the lock can be unlocked by operation of the handle 27 at the outside of the case 1, the installation recess 16 includes a bottom rotation member 25. The top rotation member 24 and the bottom rotation member 25 are overlapped with each other and do not drive mutually. The bottom rotation member 25 includes a second transmission member 251, a second hole 252 which is located corresponding to the installation hole 162, and a second contact portion 253. Preferably, the first resilient member 26 is a torsion spring. The torsion spring includes two legs which respectively contact the wall of the installation recess 16 and first and second contact portions 243, 253. When the first transmission member 241 and the second transmission member 251 are assigned to the top rotation member 24 or the bottom rotation member 25, and are rotated, the first contact portion 243 or the second contact portion 253 compresses the first resilient member 26 and pushes the passive member 22 so that the spring 23 is compressed and the head 21 does not protrude out from the case 1.

In yet another embodiment, for the latch bolt 2, the latch bolt recess 13 includes a positioning recess 136, a connection recess 137 and the installation recess 16 defined in communication with each other along the X-axis of the latch bolt recess 13. A fifth positioning wall 138 is formed on one end of the X-axis of the latch bolt recess 13. The positioning recess 136 is defined between the fifth positioning wall 138 and the second positioning wall 132. The case 1 includes a connection groove 1381 defined in one end of the fifth positioning wall 138. A first connector 1382 protrudes from the other end of the fifth positioning wall 138. The second positioning wall 132 includes a second connector 1321 which is located corresponding to the first connector 1382. The connection recess 137 is defined between the first connector 1382 and the second connector 1321. The passive member 22 is engaged with the connection groove 1381 and includes a bent portion 221 extending from each of two ends thereof. Each bent portion 221 includes a through hole 222. The latch bolt 2 includes a shank 223 which extends through the through holes 222 and is connected to the head 21. The shank 223 includes a positioning ring 224 mounted thereto which is located between the bent portions 221. The spring 23 is located between the positioning ring 224 and the bent 221 of the head 21 so that the positioning ring 224 is located in the positioning recess 136 and biased by the spring 23 and contacts the first and second connectors 1382, 1321.

Function 5: Preventing the Bottom Rotation Member 25 from being Rotated by Operation of the Handle 27 at Outside of the Case 1.

As shown in FIGS. 16 to 18, a second embodiment of the lock is disclosed, and the differences between the first and second embodiments are that the restriction recess 14 includes a lock block 36, and does not have the restriction bolt 3 and the stop plate 33 as mentioned in function 2. Therefore, the function 5 and the function 2 cannot be existed simultaneously, but can be existed with the functions 1, 3 and 4. The second embodiment is used to the door of bathrooms, kitchens and hallways. The core 18 may have a keyhole in each of two ends thereof, alternatively, a knob can be connected to the core located at the inside of the door so as to directly rotate the cam 181. A key is used to be inserted into the keyhole from the outside of the door, depending on practical needs. The case 1 includes a bore 142 which is located corresponding to the restriction recess 14, and the bore 142 is defined in the second part 12 and includes the lock block 36 slidably received therein. The lock block 36 includes a control bar 361, a passage 362, an engaging portion 363 and an inclined portion 364. The control bar 361 protrudes beyond the bore 142. The first restriction member 142 extends through the passage 362. The bottom rotation member 25 includes an engaging notch 254 which is located corresponding to the engaging portion 363. The top rotation member 24 includes a push portion 246 which is located corresponding to the inclined portion 364. As shown in FIG. 17, when in the closed position, the lock block 36 is located at a first position where the lock block 36 slides to engage the engaging portion 363 with the engaging notch 254. Therefore, the operation of the handle 27 on the outside of the door cannot rotate the bottom rotation member 25 to position the latch bolt 2 at the unlocked position. As shown in FIG. 18, the top rotation member 24 is rotated by operating the handle 27 on the inside of the door. Alternatively, the top rotation member 24 can also be rotated by using the core 18 at the inside or outside to rotate the core 181 to rotate the top rotation member 24 by the transmission plate 28. Therefore, the top rotation member 24 is rotated from the closed position to the opened position, the push portion 246 contacts the inclined portion 364 to drive the lock block 36 to a second position such that the engaging portion 363 is disengaged from the engaging notch 254. The lock block 36 releases the bottom rotation member 25, and the latch bolt 2 is located at the opened position.

In this embodiment, because there is no restriction bolt 3, so that the case 1 includes the first hole located corresponding to the latch bolt recess 13, and the strike plate 19 having the third hole located corresponding to the deadbolt recess 15.

Function 6: Unlocking Feature in Emergency.

As shown in FIG. 19 which shows the third embodiment of the present invention, wherein the differences between the first and third embodiments are that the restriction plate 4 includes a restriction part 44 that is installed to the existed restriction plate 4. The second part 12 has a longitudinal slot 163 in which the restriction part 44 slides. The transmission plate 28 includes an engaging recess 282 located corresponding to the restriction part 44. The restriction part 44 has a sufficient length so that the engaging recess 282 can mount to the restriction part 44. The engaging recess 282 has a space that is larger than the restriction part 44, and engaging recess 282 includes an inclined guide face 283 which is located corresponding to the position where the restriction part 44 compresses the resilient unit 42. In other words, the deadbolt 8 is located at the locked position, and the latch bolt 2 is located at the closed position. When the core 18 does not rotate the cam 181, the users can operate the handle 27 on the inside of the door to rotate the top rotation member 24 to rotate the closed position to the opened position. As shown in FIG. 20, the transmission plate 28 operates the restriction part 44 to drive the restriction plate 4 to compress the resilient unit 42 by the guide face 283. The restriction plate 4 moves to disengage the engaging member 43 from the second notch 54. The guide slot 281 pulls the second guide member 52 to move the deadbolt 8 to the unlocked position, and the latch bolt 2 moves to the opened position as shown in FIG. 21. The embodiment can be used on emergency doors so that the latch bolt 2 and the deadbolt 8 can be unlocked and opened by operating the handle on the inside of the door without using the key.

Besides, if the cam 181 is rotated by rotating the core 18, the lock can also be set to the unlocked position and the opened position.

It is noted that the function 6 can be combined with the functions 1 to 3, however, in one embodiment, the third embodiment can also be used with different type of case instead of the case 1 as disclosed.

Function 7: Locking the Handle 27 at the Locked Position.

As shown in FIGS. 22 to 24, the fourth embodiment is disclosed, and the differences between the first and fourth embodiments are that the driving member 5 is not connected with the deadbolt 8, so that the embodiment cannot perform function 3. As shown in FIGS. 22, 23, the driving member 5 has a lug 57, and the transmission plate 28 has a protrusion 284 that is located corresponding to the lug 57. It is noted that in this embodiment, the handle 27 can only be installed to the top rotation member 24, and the installation hole 162 of the bottom rotation member 25 is closed. Alternatively, each of the top and bottom rotation members 24, 25 can be connected with a handle 27, and the two handles 27 have to be rotated simultaneously. As shown in FIG. 24, when in the locked position, the engaging member 43 is engaged with the second notch 54, and the protrusion 284 contacts the bottom of the lug 57 so that when trying to rotate the top rotation member 24, the top rotation member 24 is restricted by the protrusion 284 and the lug 57, and cannot be rotated. Even if there is a handle 27 installed to the outside of the door, because the two handles 27 are co-rotated, so that the latch bolt 2 cannot move to the opened position because the top rotation member 24 cannot be rotated. The only way is to rotate the cam 181 by the core 18 by moving the restriction plate 4 to disengage the engaging member 43 from the second notch 54, and to move the driving member 5 to the unlocked position to separate the protrusion 284 from the lug 57. Therefore, the latch bolt 2 can move to the opened position.

Function 8: Deadbolt 8 Having a Roller 83.

As shown in FIGS. 25 to 29, the fifth embodiment is disclosed, wherein the differences between the embodiments 1 and 5 are that the fifth embodiment can only perform functions 3 and 4, and cannot perform function 1 and 2. The deadbolt 8 includes a roller 83 and can be used for doors of storage rooms or plants. The deadbolt 8 including the roller 83 does not necessarily used in the case 1 as disclosed, different types of cases can also be used. This embodiment includes only the functions 3 and 4. The driving member 5 has a first slot 58 and a transverse slot 581. The driving member 5 includes two channels 582 defined in a distal end thereof. The driving member 5 is connected to a first spring 583, a second spring 584 and at least one positioning rod 585. The first spring 583 is located corresponding to the first slot 58.

The deadbolt 8 further includes a body 81, an insertion member 82, the roller 83 and a slide 84, wherein the body 81 has a fixing slot 811 to which a distal end of the driving member 5 is connected. The body 81 includes a receiving space 812 located opposite to one end of the driving member 5. The body 81 includes at least one fixing hole 813 which communicates with the fixing slot 811.

The insertion member 82 is received in the fixing hole 813 and includes two connection portions 821 which are respectively inserted into the channels 582. Each connection portion 821 has a through hole 822. An accommodating room 823 is formed between the two connection portions 821 so as to receive the roller 83 therein. A pin 831 extends through the roller 83, and two ends of the pin 831 are fixed with the two through holes 822. The insertion member 82 includes a guide rod 824 protruding therefrom which is located corresponding to the transverse slot 581. The second spring 584 biases the end face of the insertion member 82 that is located opposite to the roller 83. In order to allow the insertion member 82 to slide in the fixing slot 811 stably, the fixing slot 811 includes at least one guide way 814 which is located at the path that the roller 83 moves between non-transmission position and transmission position. The insertion member 82 includes ridges 825 which slide on the guide ways 814.

The slide 84 is restricted by the positioning rods 585. In one embodiment, the slide 84 includes a first receiving notch 841 defined in the bottom thereof, and an extension portion 842 extending from the top thereof. A second receiving notch 843 is formed at the lower end of the extension portion 842. The positioning rods 585 are respectively engaged with the first receiving notch 841, the lateral side of the extension portion 842 that faces the roller 83, and the second receiving notch 843 at the non-transmission position. Therefore, the slide 84 can only be moved longitudinally.

The slide 84 includes a first guide pin 844 and a guide hole 845. The first guide pin 844 extends through the first slot 58. The slide 84 includes an inclined surface 846 so that the first spring 583 biases the inclined surface 846 so that the slide 84 is movable along the first slot 58. The guide hole 845 includes an extension slot 847 and an inclined slot 848. The extension slot 847 is located at the top end of the guide hole 845 and located corresponding to the transverse slot 581. The inclined slot 848 communicates with the extension slot 847 and inclinedly extends toward a direction away from the roller 83. The slide 84 has a transmission rod 849 extending toward a direction away from the roller 83, and the transmission rod 849 is located at the rail “R” when the lock is at the unlocked position.

In order to balance the movement of the slid 84, the driving member 5 has a second slot 586 which is located corresponding to the first slot 58. The slide 84 has a second guide pin 8441 which is movable in the second slot 586.

As shown in FIGS. 28 and 29, when the deadbolt 8 is located at the locked position or the unlocked position, the deadbolt 8 is able to perform the function 3. When in the non-transmission position, as shown in FIGS. 28 and 30, the slide 84 is biased by the first spring 583 so that the first guide pin 844 is located the inner bottom end of the first slot 58. The insertion member 82 is biased by the second spring 584 and the roller 83 protrudes beyond the receiving space 812. When in the transmission position, as shown in FIG. 31, only the driving member 5, the deadbolt 8 and the core 18 are disclosed for clarity purpose, the transmission rod 849 is pushed by the cam 181 so that the slide 84 and the inclined slot 848 move toward the top of the first slot 58. The guide rod 824 contacts the inclined slot 848 to drive the slide 84 and the roller 83 to move along the transverse slot 581 and toward a direction opposite to the roller 83. Therefore, the roller 83 does not protrude beyond the receiving space 812. The purpose is that when in the unlocked position as shown in FIG. 27, the roller 83 partially protrudes beyond the case 1 so that by rotating the cam 181 clockwise to move the transmission rod 849, the roller 83 does not protrude beyond the case 1 so that the door can be opened and closed. Because in the non-transmission position, insertion member 82 is not restricted, and is only biased by the second spring 584 to press the roller 83 along a direction perpendicular to the axis of the roller 83, and this also makes the roller 83 be moved into the receiving space 812. Therefore, by a force applied to the door, the door can be opened or closed.

As shown in FIG. 32, for the receiving box 9 installed to the door frame, the receiving box 9 includes a receiving hole 91 that is located corresponding to the deadbolt 8. The receiving hole 91 includes two resilient members 92 received therein. Each receiving member 92 includes an installation portion 921 and a holding portion 922. The installation portion 921 is connected to the wall of the receiving hole 91, and the holding portion 922 is a bent portion and extends toward the opening of the receiving hole 91. A holding room is defined between the two holing portions 922 and located corresponding to the roller 83 and the deadbolt 8. When the door is opened, the roller 83 is stopped by the holding portions 922 so that the roller 83 is not retracted into the receiving room 812, so that the door cannot be closed. When the door is closed, by operating the core 18, the roller 83 is retracted into the receiving space 812, so that the roller 83 is not affected by the holding portions 922 and is successfully closed.

The lock may have at least one of the functions 1 to 8 according to practical needs, and can be used in different locations. For example, as shown in FIG. 33 which discloses the sixth embodiment, and can perform functions 1 and 5 so that the lock can be used on bathroom doors. As shown in FIG. 34 which discloses the seventh embodiment, and can perform functions 1, 5 and 7 so that the lock can be used on room doors. As shown in FIG. 35 which discloses the eighth embodiment, and can perform function 1 so that the lock can be used on bathroom doors, kitchen doors and hallway doors. The portion that does not have the core hole 176 can be sealed by inserting a seal member (not shown). As shown in FIG. 36 which discloses the ninth embodiment, and can perform function 3 so that the lock can be used on storage room doors.

While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims

1. A lock comprising: a case (1) having a latch bolt recess (13), an installation recess (16), a restriction recess (14), a core recess (17) and a deadbolt recess (15) defined in sequence in a lateral side thereof, the core recess (17) having a first guide member (178) and defining a loop-like rail (R), the case (1) having an installation hole (162) defined in a Z-axis thereof and the installation hole (162) is located within an inner bottom of the installation recess (16);a latch bolt (2) located in the latch bolt recess (13) and including a head (21), a passive member (22) and a spring (23), the passive member (22) fixed to the head (21), the spring (23) biased between an inside of the latch bolt recess (13) and the passive member (22), when in a closed position, the spring (23) extends to protrude the head (21) out from the case (1), when in an opened position, the spring (23) is compressed and the head (21) does not protrude out from the case (1);a top rotation member (24) located in the installation recess (16) and including a first transmission member (241), a first hole (242) located corresponding to the installation hole (162), and a first contact portion (243), the installation recess (16) including a first positioning portion (161) located corresponding to a distal end of the latch bolt recess (13), a first resilient member (26) connected to the first positioning portion (161) and biasing the first contact portion (243), when the first transmission member (241) is assigned to the top rotation member (24) and is rotated by the top rotation member (24), the first contact portion (243) compresses the first resilient member (26) and pushes the passive member (22) so that the spring (23) is compressed and the head (21) does not protrude out from the case (1), when in the closed position, the first resilient member (26) bounces and contacts the first contact portion (243), the first transmission member (241) does not press the passive member (22), the top rotation member (24) having a pivotal member (245) which has a transmission plate (28) pivotably connected thereto;a restriction plate (4) having a first guide hole (41) defined therein, the first guide member (178) extending through the first guide hole (41), the restriction plate (4) having a restriction part (44), the case (1) having a third positioning wall (172), a second positioning portion (173) formed at an inner bottom of the third positioning wall (172), a resilient unit (42) located in the third positioning portion (173) and biased between the restriction plate (4) and a bottom of the third positioning wall (172), a resilient direction of the resilient unit (42) being correspondent to the first guide hole (41), the restriction plate (4) including at least one engaging member (43), a bottom of the restriction plate (4) located on the rail (R);a driving member (5) having one end thereof fixed to a deadbolt (8), the deadbolt (8) movable within the deadbolt recess (15), the driving member (5) having a slide slot (51) in which the first guide member (178) is slidably received therein, the driving member (5) having a second guide member (52) on an end face thereof, the driving member (5) including a first notch (53) and a second notch (54) defined in a top thereof, the first and second notches (53, 54) located corresponding to the at least one engaging member (43), the at least one engaging member (43) having a third notch (55) defined in an underside thereof, the transmission plate (28) including a guide slot (281) to which the second guide member (52) is mounted, the transmission plate (28) including an engaging recess (282) located corresponding to the restriction part (44), the restriction part (44) having a space that is larger than the restriction part (44), the engaging recess (282) including an inclined guide face (283) which is located corresponding to a position where the restriction part (44) compresses the resilient unit (42), the third notch (55) located at the rail (R);when in a locked position, the deadbolt (8) protrudes beyond the deadbolt recess (15), the first guide member (178) is located in an end of the slide slot (51) and located opposite to the deadbolt (8), the at least one engaging member (43) is engaged with the second notch (54), the top rotation member (25) is located at the closed position, when in an unlocked position, the deadbolt (8) is located in the deadbolt recess (15), the at least one engaging member (43) is engaged with the first notch (53), the first guide member (178) is located is located in another end of the slide slot (51), the second guide member (52) is located at a top of the guide slot (281), when in an opened position, the second guide member (52) is located at a bottom of the guide slot (281);when at the locked position, the top rotation member (24) is rotated from the closed position to the opened position, the transmission plate (28) operates the restriction part (44) to drive the restriction plate (4) to compress the resilient unit (42) by the guide face (283), the restriction plate (4) moves to disengage the engaging member (43) from the second notch (54), the guide slot (281) pulls the second guide member (52) to move the deadbolt (8) to the unlocked position, and the latch bolt (2) moves to the opened position.

2. The lock as claimed in claim 1 further comprising an extension plate (6) which has an end thereof eccentrically and pivotably connected to the second guide member (52), the extension plate (6) including an extension slot (61) which extends toward two opposite extension directions which are located corresponding to the slide slot (51), the first guide member (178) slidable within the extension slot (61), the extension plate (6) located at the rail (R).

3. The lock as claimed in claim 1, wherein the extension plate (6) includes a concaved portion (62) defined in the lateral side corresponding to the second guide member (52), the concaved portion (62) and a lateral wall of the concaved portion (62) are located at the rail (R).

4. The lock as claimed in claim 1, wherein the case (1) includes a longitudinal slot (163) defined in one end face thereof and the restriction part (44) slides within the longitudinal slot (163).

5. The lock as claimed in claim 1, wherein a bottom rotation member (25) is located in the installation recess (16), the bottom rotation member (25) includes a second transmission member (251), the top rotation member (24) and the bottom rotation member (25) are overlapped with each other and do not drive mutually, the bottom rotation member (25) includes a second transmission member (251), a second hole (252) which is located corresponding to the installation hole (162), and a second contact portion (253), the first resilient member (26) biases first and second contact portions (243, 253), when the first transmission member (241) and the second transmission member (251) are assigned to the top rotation member (24) or the bottom rotation member (25), and are rotated, the first contact portion (243) or the second contact portion (253) compresses the first resilient member (26) and pushes the passive member (22) so that the spring (23) is compressed and the head (21) does not protrude out from the case (1), when in the closed position, the first resilient member (26) bounces and pushes the first contact portion (243) and the second contact portion (253), the first and second transmission members (241, 251) do not contact the passive member (22).

6. The lock as claimed in claim 1, wherein the latch bolt recess (13) includes a positioning recess (136), a connection recess (137) and the installation recess (16) defined in communication with each other along an X-axis of the latch bolt recess (13), a fifth positioning wall (138) is formed on one end of the X-axis of the latch bolt recess (13), the positioning recess (136) is defined between the fifth positioning wall (138) and the second positioning wall (132), the case (1) includes a connection groove (1381) defined in one end of the fifth positioning wall (138), a first connector (1382) protrudes from another end of the fifth positioning wall (138), the second positioning wall (132) includes a second connector (1321) which is located corresponding to the first connector (1382), the connection recess (137) is defined between the first connector (1382) and the second connector (1321), the passive member (22) is engaged with the connection groove (1381) and includes a bent portion (221) extending from each of two ends thereof, each bent portion (221) includes a through hole (222), the latch bolt (2) includes a shank (223) which extends through the through holes (222) and is connected to the head (21), the shank (223) includes a positioning ring (224) mounted thereto which is located between the bent portions (221), the spring (23) is located between the positioning ring (224) and the bent (221) of the head (21) so that the positioning ring (224) is located in the positioning recess (136) and biased by the spring (23) and contacts the first and second connectors (1382, 1321).

7. The lock as claimed in claim 1, wherein the driving member (5) includes a third guide member (56), a stop plate (7) is pivotably connected to the third guide member (56), the stop plate (7) includes an extension portion (71) which includes a corner (72), the extension portion (71) includes a rod (73) which is slidable in the elongate groove (175) defined in an end face of the case (1), when in the locked position, the rod (73) is moved to a top inner end of the elongate groove (175), when in the unlocked position, the rod (73) is located at the bottom inner end of the elongate groove (175), the corner (72) is removed from the rail (R) when at the unlocked position.

8. The lock as claimed in claim 1, wherein the first resilient member (26) is a torsion spring, and the torsion spring contacts a wall of the installation recess (16) and first and second contact portions (243, 253).

9. The lock as claimed in claim 1 further comprising a handle (27) which is installed to a first hole (242) of the top rotation member (24) via the installation hole (162).

10. The lock as claimed in claim 1, wherein the core recess (17) includes a core (18) and the core (18) includes a cam (181) which is rotatably along the rail (R).