阅读说明：本技术 一种可取消密码开锁功能的门锁 (Door lock with unlocking function capable of taking and eliminating secret code ) 是由 陈贤栋 刘振林 汪剑楠 王忠清 于 2020-07-21 设计创作，主要内容包括：本发明属于门锁技术领域,特指一种可取消密码开锁功能的门锁,包括朝向室外并连接有外执手的外锁壳,以及朝向室内并连接有内执手的内锁壳,外执手与内执手可同步转动,外锁壳内设有可阻止外执手转动的锁条,以及与锁条相连接的拉簧,拉簧使得锁条具有向下移动的趋势,外锁壳上还连接有可阻止锁条向下移动的密码拨轮,外执手与内执手之间连接有贯穿外锁壳与内锁壳的方杆,方杆可随外执手与内执手转动,并可相对外执手与内执手前后移动,方杆上固定有可与锁条相配合的锁块,锁块上形成有朝向锁条的锁死槽,锁条上端形成有可伸入锁死槽的锁死凸体。用户可根据自身需求来开启与取消该门锁的密码开锁功能,该门锁为用户提供了更多的选择。(The invention belongs to the technical field of door locks, in particular to a door lock capable of achieving a password-eliminating unlocking function, which comprises an outer lock shell facing outdoors and connected with an outer handle, an inner lock shell facing indoors and connected with an inner handle, wherein the outer handle and the inner handle can synchronously rotate, a lock bar capable of preventing the outer handle from rotating and a tension spring connected with the lock bar are arranged in the outer lock shell, the tension spring enables the lock bar to have a downward moving trend, a password dial wheel capable of preventing the lock bar from moving downwards is also connected to the outer lock shell, a square rod penetrating through the outer lock shell and the inner lock shell is connected between the outer handle and the inner handle, the square rod can rotate along with the outer handle and the inner handle and can move back and forth relative to the outer handle and the inner handle, a lock block capable of being matched with the lock bar is fixed on the square rod, a lock dead slot facing the lock bar is formed on the lock block, and a lock dead convex body capable of extending into the lock dead slot is formed at. The user can open and cancel the password function of unblanking of this lock according to self demand, and this lock provides more choices for the user.)

1. A door lock capable of achieving a password-eliminating unlocking function comprises an outer lock shell (11) facing outdoors and connected with an outer handle (1), and an inner lock shell (21) facing indoors and connected with an inner handle (2), wherein the outer handle (1) and the inner handle (2) can synchronously rotate, a lock bar (3) capable of preventing the outer handle (1) from rotating and a tension spring (31) connected with the lock bar (3) are arranged in the outer lock shell (11), the tension spring (31) enables the lock bar (3) to have a downward moving trend, a password dial wheel (4) capable of preventing the lock bar (3) from moving downwards is further connected onto the outer lock shell (11), the door lock is characterized in that a square rod (5) penetrating through the outer lock shell (11) and the inner lock shell (21) is connected between the outer handle (1) and the inner handle (2), and the square rod (5) can rotate along with the outer handle (1) and the inner handle (2), the lock can move back and forth relative to the outer handle (1) and the inner handle (2), a lock block (51) which can be matched with the lock bar (3) is fixed on the square rod (5), a dead lock groove (511) facing the lock bar (3) is formed on the lock block (51), and a dead lock convex body (32) which can stretch into the dead lock groove (511) is formed at the upper end of the lock bar (3);

when the square rod (5) moves to the position that the dead lock groove (511) of the lock block (51) is not aligned with the dead lock convex body (32), the lock bar (3) cannot influence the rotation of the outer handle (1).

2. The door lock with the function of eliminating the password unlocking according to claim 1, wherein a first linkage through hole (52) is formed in the square bar (5), and a second linkage through hole (22) communicated with the first linkage through hole (52) is formed in the inner handle (2);

when the bolt penetrates through the second linkage through hole (22) and is inserted into the first linkage through hole (52), the bolt is moved back and forth, and the square rod (5) moves back and forth along with the bolt.

3. The door lock with the function of eliminating the secret code unlocking according to claim 1, characterized in that an outer driving part (6) which is inserted into the outer handle (1) and can rotate along with the outer handle (1) is arranged in the outer lock shell (11), an outer pushing block (61) is formed in the outer lock shell (11) on the outer driving part (6), outer reset pieces (7) are arranged at the upper end and the lower end of the outer pushing block (61) in the outer lock shell (11), an outer reset spring (71) is connected in each outer reset piece (7), the outer reset springs (71) enable the outer reset pieces (7) to have the trend of being far away from each other, an inner driving part (8) which is inserted into the inner handle (2) and can rotate along with the inner handle (2) is arranged in the inner lock shell (21), and an inner pushing block (81) is formed in the inner lock shell (21) on the inner driving part (8), inner reset pieces (9) are arranged at the upper end and the lower end of the inner pushing block (81) in the inner lock shell (21), an inner reset spring (91) is connected in each inner reset piece (9), the inner reset springs (91) enable the inner reset pieces (9) to have a trend of being close to each other, and the square rods (5) are inserted into the outer driving piece (6) and the inner driving piece (8) simultaneously;

when outer handle (1) and interior handle (2) rotate, outer driving piece (6) are through outer ejector pad (61) promote outer piece (7) that resets keep away from each other, interior driving piece (8) are through interior ejector pad (81) promote interior piece (9) keep away from each other.

4. A door lock with a removable code unlocking function according to claim 3, characterized in that the outer driving member (6) is formed with an outer retainer ring (62) for pressing the outer return member (7) into the outer lock housing (11), and the inner driving member (8) is formed with an inner retainer (82) for pressing the inner return member (9) into the inner lock housing (21).

5. The door lock with the function of canceling the password unlocking according to claim 4, wherein the outer retainer ring (62) is formed with a fitting through hole (621) for the locking piece (51) to enter, and the outer reset piece (7) is formed with a limiting groove (72) which is matched with the fitting through hole (621) in shape and can be used for the locking piece (51) to be embedded in.

6. The door lock with the encryption and decryption functions as claimed in claim 1, wherein the code wheel (4) is formed with a rotating shaft (41) inserted into the outer lock case (11) and extending into the lock bar (3), the rotating shaft (41) is sleeved with a lock ring (42) positioned in the lock bar (3) and rotatable with the code wheel (4), the lock ring (42) is formed with an unlocking slot (421), and the lock bar (3) is formed with an unlocking protrusion (33) abutting against the upper end of the lock ring (42);

when the lock ring (42) is rotated to the direction in which the unlocking groove (421) faces the unlocking protrusion (33), the lock bar (3) can be moved downward and the unlocking protrusion (33) is caused to protrude into the unlocking groove (421).

7. A door lock with a removable secret code unlocking function according to claim 6, characterized in that a bracket (10) pressed by the lock bar (3) is arranged in the outer lock shell (11), support plates (101) are formed on the bracket (10), a socket (102) for the rotation shaft (41) to pass through is defined between the support plates (101), and a ring groove (411) for the support plates (101) to insert is formed on the rotation shaft (41).

8. The door lock with the function of canceling the unlocking of the secret code according to claim 6 is characterized in that a baffle plate (103) abutting against the side end of the locking bar (3) is formed on the bracket (10).

9. A door lock with a removable secret code unlocking function according to claim 6, characterized in that the bracket (10) is formed with a toggle clamping piece (104) extending out of the outer lock shell (11), and one end of the secret code thumb wheel (4) facing to the outer lock shell (11) is formed with a toggle groove (43) for the toggle clamping piece (104) to extend into.

10. The door lock with the function of eliminating the secret code unlocking according to claim 1, wherein a limiting through hole (34) is formed in the lock bar (3), a guide post (111) inserted into the limiting through hole (34) is formed in the outer lock case (11), and the limiting through hole (34) can move up and down relative to the guide post (111).

Technical Field

The invention belongs to the technical field of door locks, and relates to a door lock capable of achieving a password unlocking function.

Technical Field

Password unblanking is a common function on modern lock, and this function makes the user just can rotate the handle and open the lock under the condition of correct input password, and this function has increased the security of lock for the lock can protect user's house not invaded better, has further ensured user's personal and property safety.

However, when the user repeatedly enters and exits the room in a short time, the password unlocking function also causes a certain trouble to the user. Because ordinary password lock closes the back at the user, its lock just can pin the door, and at the in-process of business turn over repeatedly, the user opens the lock at every turn and all need input correct password and just can rotate the handle and open the lock, and this just can make user's the step of opening the door become very loaded down with trivial details to make the user waste a large amount of time in the fact of unblanking. If the door is directly opened, so that a user can repeatedly enter and exit in a short time, although the unlocking step can be omitted, and the time of the user is saved, under the condition that the user is not indoors, hidden dangers are caused to the indoor by the opened door, and the user is unwilling to see the hidden dangers.

To above-mentioned problem, can design one kind and can cancel the lock of password function of unblanking at any time according to the user's demand for the user only needs directly to rotate the handle alright open this lock after the password function of unblanking of cancellation lock.

Disclosure of Invention

The invention provides a door lock capable of canceling the password unlocking function according to the problems, and a user can freely cancel and restore the password unlocking function of the door lock, thereby providing more choices for the user when using the door lock.

The purpose of the invention is realized as follows:

a door lock with a password-eliminating unlocking function comprises an outer lock shell facing outdoors and connected with an outer handle, and an inner lock shell facing the indoor and connected with an inner handle, the outer handle and the inner handle can synchronously rotate, a lock bar capable of preventing the outer handle from rotating is arranged in the outer lock shell, and a tension spring connected with the locking bar, wherein the tension spring makes the locking bar have a downward moving trend, the outer lock shell is also connected with a password thumb wheel which can prevent the lock bar from moving downwards, a square rod which penetrates through the outer lock shell and the inner lock shell is connected between the outer handle and the inner handle and can rotate along with the outer handle and the inner handle, the square rod is fixed with a locking block which can be matched with the locking bar, the locking block is provided with a locking groove facing the locking bar, and the upper end of the locking bar is provided with a locking convex body which can extend into the locking groove;

when the square bar moves to the state that the dead lock groove of the lock block is not aligned with the dead lock convex body, the lock bar cannot influence the rotation of the outer handle.

Furthermore, a first linkage through hole is formed in the square rod, and a second linkage through hole communicated with the first linkage through hole is formed in the inner handle;

when the bolt penetrates through the second linkage through hole and is inserted into the first linkage through hole, the bolt is moved back and forth, and the square rod moves back and forth along with the bolt.

Furthermore, an outer driving part which is inserted into the outer handle and can rotate along with the outer handle is arranged in the outer lock shell, an outer pushing block is formed in the outer lock shell on the outer driving part, outer reset pieces are arranged at the upper end and the lower end of the outer pushing block in the outer lock shell, an outer reset spring is connected in the outer reset pieces, the outer reset spring enables the outer reset pieces to have a trend of being away from each other, an inner driving part which is inserted into the inner handle and can rotate along with the inner handle is arranged in the inner lock shell, an inner push block is formed in the inner lock shell on the inner driving part, inner reset pieces are arranged at the upper end and the lower end of the inner push piece in the inner lock shell, an inner reset spring is connected in the inner reset piece, the inner reset spring enables the inner reset pieces to have a trend of being close to each other, and the square rod is simultaneously inserted into the outer driving part and the inner driving part;

when the outer handle and the inner handle rotate, the outer driving piece pushes the outer reset pieces to be away from each other through the outer pushing block, and the inner driving piece pushes the inner reset pieces to be away from each other through the inner pushing block.

Furthermore, an outer retainer ring capable of pressing the outer reset piece into the outer lock shell is formed on the outer driving piece, and an inner baffle capable of pressing the inner reset piece into the inner lock shell is formed on the inner driving piece.

Furthermore, a matching through hole for the locking block to enter is formed in the outer retaining ring, and a limiting groove matched with the matching through hole in shape and used for the locking block to be embedded in is formed in the outer reset piece.

Furthermore, a rotating shaft inserted into the outer lock shell and extending into the lock bar is formed on the code thumb wheel, a lock ring which is positioned in the lock bar and can rotate along with the code thumb wheel is sleeved on the rotating shaft, an unlocking groove is formed on the lock ring, and an unlocking convex body abutting against the upper end of the lock ring is formed in the lock bar;

when the lock ring is rotated to the direction in which the unlocking groove faces the unlocking protrusion, the lock bar may be moved downward and the unlocking protrusion is caused to protrude into the unlocking groove.

Furthermore, a support compressed by the lock bar is arranged in the outer lock shell, support sheets are formed on the support, an insertion opening through which the rotating shaft can pass is defined between the support sheets, and a ring groove into which the support sheets can be inserted is formed on the rotating shaft.

Furthermore, a baffle plate which is abutted against the side end of the locking bar is formed on the bracket.

Furthermore, a poking clamping piece extending out of the outer lock shell is formed on the support, and a poking groove for the poking clamping piece to extend into is formed at one end, facing the outer lock shell, of the password poking wheel.

Furthermore, a limiting through hole is formed in the lock bar, a guide pillar inserted into the limiting through hole is formed in the outer lock shell, and the limiting through hole can move up and down relative to the guide pillar.

Compared with the prior art, the invention has the outstanding and beneficial technical effects that:

1. the user can drive the lock block to move by moving the square rod back and forth, when the lock block is positioned at the upper end of the lock bar, the password unlocking function of the door lock is opened, when the lock block is moved away from the upper end of the lock bar, the password unlocking function of the door lock is closed, the user can freely open and close the password unlocking function of the door lock according to the situation, and the requirements of the user are better met.

2. The password door lock is simple in structure, convenient to operate by a user and easy to produce and install.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a perspective view illustrating an exploded state of the present invention.

Fig. 3 is a perspective view of the outer lock case.

Fig. 4 is a perspective view of the inner lock case.

Fig. 5 is a schematic view of the internal structure of the outer lock case.

Fig. 6 is a perspective view of the locking bar.

Fig. 7 is a perspective view of the square bar.

Fig. 8 is a perspective view of the combination wheel.

Fig. 9 is a perspective view of the stand.

1-outer handle, 11-outer lock case, 111-guide post, 2-inner handle, 21-inner lock case, 22-second linkage through hole, 3-locking bar, 31-tension spring, 32-deadlocking protrusion, 33-unlocking protrusion, 34-limit through hole, 4-code wheel, 41-rotation axis, 411-ring groove, 42-locking ring, 421-unlocking groove, 43-toggle groove, 5-square bar, 51-locking piece, 511-deadlocking groove, 52-first linkage through hole, 6-outer driving piece, 61-outer pushing piece, 62-outer retainer ring, 621-mating through hole, 7-outer restoring piece, 71-outer restoring spring, 72-limit groove, 8-inner driving piece, 81-inner pushing piece, 82-inner baffle, 9-inner reset piece, 91-inner reset spring, 10-bracket, 101-support piece, 102-socket, 103-baffle and 104-toggle clamping piece.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The invention will be further described in the following with reference to specific embodiments thereof,

as shown in fig. 1-7, a door lock capable of achieving a password-free unlocking function comprises an outer lock case 11 facing outdoors and connected with an outer handle 1, an inner lock case 21 facing indoors and connected with an inner handle 2, wherein the outer handle 1 and the inner handle 2 can synchronously rotate, a lock bar 3 capable of preventing the outer handle 1 from rotating and a tension spring 31 connected with the lock bar 3 are arranged in the outer lock case 11, the tension spring 31 enables the lock bar 3 to have a downward moving trend, a password dial wheel 4 capable of preventing the lock bar 3 from moving downwards is further connected on the outer lock case 11, a square rod 5 penetrating through the outer lock case 11 and the inner lock case 21 is connected between the outer handle 1 and the inner handle 2, the square rod 5 can rotate along with the outer handle 1 and the inner handle 2 and can move back and forth relative to the outer handle 1 and the inner handle 2, a lock block 51 capable of being matched with the lock bar 3 is fixed on the square rod 5, the locking piece 51 is formed with a locking groove 511 facing the locking bar 3, and the upper end of the locking bar 3 is formed with a locking protrusion 32 capable of extending into the locking groove 511. Specifically, outer handle 1 passes through outer lock shell 11 is installed in the outdoor one side of door orientation, interior handle 2 passes through interior lock shell 21 is installed in the indoor one side of door orientation to square bar 5 through running through door and outer lock shell 11 and interior lock shell 21 is right outer handle 1 is connected with interior handle 2, makes outer handle 1 can realize synchronous the rotation with interior handle 2, square bar 5 links with the spring bolt that can stretch out and draw back at the door side when running through the door, rotates when the user during outer handle 1 or interior handle 2, square bar 5 drives in the spring bolt withdrawal room to realize opening the door action, when the user loosens outer handle 1 and interior handle 2 after, the spring bolt pops out from the door side again from the door. In the door lock, when the dial wheel 4 is not rotated to the correct password position, and the user moves the square rod 5 to the position where the lock block 51 is located at the upper end of the lock bar 3, the dial wheel 4 will prevent the tension spring 31 from pulling the lock bar 3 downward, the deadlocking protrusion 32 of the lock bar 3 will extend into the deadlocking groove 511 of the lock block 51, i.e. the lock bar 3 will block the lock block 51, the square rod 5 will not be rotated accordingly, so that the user cannot rotate the outer handle 1 and the inner handle 2, only after the dial wheel 4 is rotated to the correct password position, the tension spring 31 will smoothly pull the lock bar 3 downward, so that the deadlocking protrusion 32 of the lock bar 3 will leave the deadlocking groove 511 of the lock block 51 downward, i.e. the square rod 5 will be blocked by the lock bar 3 when the lock block 51 is driven to rotate, and the user can freely rotate the outer handle 1 or the inner handle 2 to unlock, at this time, the password unlocking function of the door lock is opened. When the user moves the square bar 5 to make the lock block 51 leave from the upper end of the lock bar 3, because the dead-lock convex body 32 of the lock bar 3 does not extend into the dead-lock groove 511 of the lock block 51 all the time, that is, the square bar 5 is not blocked by the lock bar 3 all the time when driving the lock block 51 to rotate, the user can freely rotate the outer handle 1 or the inner handle 2 all the time to realize unlocking, and at this time, the password unlocking function of the door lock is closed.

As shown in fig. 2 and 7, a first coupling through hole 52 is formed in the square bar 5, and a second coupling through hole 22 communicating with the first coupling through hole 52 is formed in the inner handle 2. Specifically, when a user passes a bolt with a matched shape through the second linkage through hole 22 of the inner handle 2 and inserts the first linkage through hole 52 of the square rod 5, the user only needs to pull the bolt back and forth to drive the square rod 5 to translate back and forth in the door lock, so that the lock block 51 translates back and forth at the upper end of the lock bar 3, and the unlocking function of the door lock is controlled to be opened and closed. The structure enables a user to control the unlocking and closing of the password unlocking function of the door lock more conveniently, and the square rod 5 can be controlled to move back and forth without disassembling the door lock.

As shown in fig. 2-4, an outer driving member 6 inserted into the outer handle 1 and capable of rotating along with the outer handle 1 is arranged in the outer lock case 11, an outer pushing block 61 is formed in the outer lock case 11 on the outer driving member 6, outer reset members 7 are arranged at the upper and lower ends of the outer pushing block 61 in the outer lock case 11, an outer reset spring 71 is connected in the outer reset member 7, the outer reset spring 71 enables the outer reset members 7 to have a trend of being away from each other, an inner driving member 8 inserted into the inner handle 2 and capable of rotating along with the inner handle 2 is arranged in the inner lock case 21, an inner push block 81 is formed in the inner driving member 8 in the inner lock case 21, inner reset members 9 are arranged at the upper and lower ends of the inner push block 81 in the inner lock case 21, an inner reset spring 91 is connected in the inner reset member 9, the inner reset spring 91 enables the inner reset members 9 to have a trend of being close to each other, the square bar 5 is inserted into the external driving member 6 and the internal driving member 8 at the same time. Specifically, when the user rotates outer handle 1, outer driving piece 6 along with handle 1 rotates, and through outer pushing block 61 promotes outer piece 7 that resets is kept away from each other outer reset piece 7 in-process that keeps away from each other, outer reset spring 71 receives the compression, loosens at the user outer handle 1 back, because outer reset spring 71 no longer receives the pressure that comes from outer reset piece 7, reset spring 71 begins to kick-back and resets, and promotes outer reset piece 7 is close to each other, outer reset piece 7 makes through promoting outer pushing block 61 the gyration of outer driving piece 6, finally makes outer handle 1 gyration is reset in the in-process that is close to each other. Because square bar 5 inserts simultaneously outer driving piece 6 and interior driving piece 8 to make outer handle 1 realizes synchronous the rotation with interior handle 2, and the user is rotating interior handle 2 with loosen when interior handle 2, the motion process of interior handle 2 with the motion process of outer handle 1 is the same reason.

Further, the outer driving element 6 is formed with an outer stop ring 62 capable of pressing the outer reset element 7 into the outer lock case 11, and the inner driving element 8 is formed with an inner stop plate 82 capable of pressing the inner reset element 9 into the inner lock case 21. Specifically, the outer retainer ring 62 and the inner retainer 82 fix the outer reset piece 7 and the inner reset piece 9 in the outer lock case 11, so that the internal structure of the door lock is more stable.

Further, a matching through hole 621 for the locking block 51 to enter is formed on the outer retainer ring 62, and a limiting groove 72 matched with the matching through hole 621 in shape and used for the locking block 51 to be embedded is formed in the outer reset piece 7. Specifically, the matching through hole 621 can prevent the outer retainer ring 62 from blocking the movement of the lock block 51, and the limiting groove 72 limits the movement of the lock block 51, so that the square bar 5 is prevented from being excessively pushed into the outer driving member 6 when being moved by a user.

As shown in fig. 5-8, a rotating shaft 41 inserted into the outer lock case 11 and extending into the lock bar 3 is formed on the dial wheel 4, a lock ring 42 located in the lock bar 3 and rotatable with the dial wheel 4 is sleeved on the rotating shaft 41, an unlocking groove 421 is formed on the lock ring 42, and an unlocking protrusion 33 abutting against the upper end of the lock ring 42 is formed in the lock bar 3. Specifically, the surface of the code thumb wheel 4 is provided with numbers, the surface of the outer lock shell 11 is provided with scale marks, and when the code thumb wheel 4 rotates to the surface of the code thumb wheel to make the numbers of the codes align with the scale marks on the surface of the outer lock shell 11, the correct codes are input into the door lock. When the lock block 51 moves to the upper end of the lock bar 3, the password unlocking function of the door lock is turned on, and the user does not rotate the password thumb wheel 4 to the password correct position, the unlocking groove 421 of the lock ring 42 is not aligned with the unlocking protrusion 33 of the lock bar 3, and the unlocking protrusion 33 abuts against the lock ring 42, so that the tension spring 31 cannot pull down the lock bar 3, the tension spring 3 is pulled upward by the lock bar, the deadlocking protrusion 32 of the lock bar 3 extends upward into the deadlocking groove 511 of the lock block 51, the door lock is deadlocked, and the user cannot freely rotate the outer handle 1 and the inner handle 2. When the lock block 51 moves to the upper end of the lock bar 3, the password starting function of the door lock is opened, and the user rotates the password thumb wheel 4 to the position where the password is correct, the lock ring 42 rotates with the password thumb wheel 4 to the position where the unlocking slot 421 aligns with the lock bar 3, the unlocking protrusion 33 of the lock bar 3 does not abut against the lock ring 42, the tension spring 31 no longer receives the tension force from the lock bar 3 to start retracting, and pulls the lock bar 3 to move down in the retracting process, so that the unlocking protrusion 33 extends into the unlocking slot 421, and at this time, the user can freely rotate the outer handle 1 and the inner handle 2 to open the door lock.

Further, under the condition that the door lock is unlocked by starting the password, when the password thumb wheel 4 drives the lock ring 42 to rotate to the correct position and rotates the outer handle 1, so that the unlocking convex body 33 of the lock bar 3 extends downwards into the unlocking groove 421 of the lock ring 42, the password thumb wheel 4 continues to be rotated forcibly, at this time, because the lock ring 42 is clamped by the unlocking convex body 33, the password thumb wheel 4 will rotate independently relative to the lock ring 42, the lock ring 42 does not rotate, at this time, when a user rotates the password thumb wheel 4 to the position where the number desired by the user is aligned with the scale mark on the surface of the lock case 11, the number is the unlocking password of the door lock set by the user.

As shown in fig. 5, 8 and 9, a support 10 pressed by the locking bar 3 is disposed in the outer lock case 11, support plates 101 are formed on the support 10, an insertion hole 102 for the rotation shaft 41 to pass through is defined between the support plates 101, and a ring groove 411 for the support plate 101 to insert is formed on the rotation shaft 41. Specifically, the locking strip 3 compresses tightly the support 10, and the support 10 is embedded into the annular groove 411 through the support sheet 101 to clamp the rotating shaft 41, so that the password thumb wheel 4 is finally fixed, the password thumb wheel 4 is prevented from shaking at will, and the structure of the door lock is more stable.

Furthermore, a baffle plate 103 is formed on the bracket 10 and abuts against the side end of the locking bar 3. Specifically, the baffle 103 abuts against the side end of the locking bar 3 to fix the support 10, so that the support 10 is prevented from sliding freely.

Furthermore, a toggle clamping piece 104 extending out of the outer lock shell 11 is formed on the support 10, and a toggle groove 43 into which the toggle clamping piece 104 can extend is formed at one end of the password thumb wheel 4 facing the outer lock shell 11. Specifically, after the user rotates the dial wheel 4, when the dial wheel 4 rotates to the position where the dial groove 43 is not aligned with the dial fastener 104, the dial wheel faces the end surface of the outer lock case 11 to press the dial fastener 104 back into the outer lock case 11, and when the dial wheel 4 rotates to the position where the dial groove 43 is aligned with the dial fastener 104, the dial fastener 104 pops out of the outer lock case 11 and extends into the dial groove 43. The matching of the toggle clamp 104 and the toggle groove 43 enables a user to generate a blocking feeling when rotating the password thumb wheel 4, the user can accurately rotate the password thumb wheel 4 to any scale, and the password thumb wheel 4 can accurately stop at the scale required by the user.

As shown in fig. 5, a limiting through hole 34 is formed in the locking bar 3, a guide post 111 inserted into the limiting through hole 34 is formed in the outer lock case 11, and the limiting through hole 34 can move up and down relative to the guide post 111. Specifically, the guide post 111 is matched with the limiting through hole 34 to guide the up-and-down movement of the locking bar 3, and limits the moving distance of the locking bar 3, so that the excessive movement of the locking bar 3 is avoided, and the internal structure of the door lock is further stabilized.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.