A convenient snap lock

Abstract

The application relates to the technical field of locks, in particular to a convenient lock, which comprises a first box shell and a second box shell, the second box shell is fixedly installed with a base, the base is hingedly connected with a surface shell which is buckled and locked with the first box shell; the inner side of the surface shell is provided with a locking mechanism which is buckled with the base; the surface shell is further provided with a lock cylinder, the lock cylinder is provided with a lock block which drives the locking mechanism to be unlocked, the lock block extends out a first clamping convex towards the surface shell, the surface shell extends out a second clamping convex towards the lock block, the lock block is hingedly connected with a clutch block through a hinge piece, and the base extends out a clutch part towards the clutch block. The lock of the application can pull out the key after being unlocked, can be locked in the state without inserting the key, is simple to use and convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of lock technology, and more specifically to a convenient latch. Background Technology

[0002] Most locks on the market can be unlocked with a key or a combination. However, when unlocking with a key, the key must first be inserted into the lock cylinder and then rotated 90 degrees clockwise to make the lock cylinder rotate and thus unlock the lock. But when locking, the key must be inserted and rotated counterclockwise to make the lock cylinder rotate and lock the lock. If the key is removed by rotating counterclockwise while the lock is unlocked, the lock cannot be locked. Therefore, the requirement to insert a key to lock the lock is inconvenient for users. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing a convenient lock that can be unlocked with a key and then locked without the need for a key.

[0004] The objective of this invention is achieved through the following technical solution: This application provides a convenient latch, including a first housing and a second housing. The second housing is fixedly mounted with a base, and the base is hinged to a faceplate that snaps into the first housing. The faceplate has a locking mechanism that snaps into the base. The faceplate also has a lock cylinder, which has a locking block that drives the locking mechanism to unlock. The locking block extends a first latching protrusion toward the faceplate, and the faceplate extends a second latching protrusion toward the locking block. The locking block is hinged to a clutch block via a hinge member, and the base extends a clutch portion toward the clutch block.

[0005] The convenient locking mechanism of this application operates as follows: In the locked state, the first locking protrusion is located on the locking side of the second locking protrusion. When unlocking, inserting the key and turning the lock cylinder clockwise unlocks the lock. The lock cylinder causes the lock block to slide horizontally. The first locking protrusion moves past the second locking protrusion to the unlocking side of the second locking protrusion. The clutch block moves below the clutch part, and external force is applied to flip the faceplate to unlock. The faceplate causes the clutch block to move towards the clutch part, interfering with its movement. The second locking protrusion abuts against the first locking protrusion, restricting the horizontal sliding of the lock block. The clutch part forces the clutch block to rotate in the unlocking direction. After unlocking, the clutch block moves towards the locking direction. When the key is rotated and positioned above the clutch, it can be turned counterclockwise and then removed. Since the second locking protrusion abuts against the first locking protrusion, restricting the sliding of the lock block, turning the key and removing it will not lock the latch. The entire latch remains unlocked. When locking, an external force is applied to flip the faceplate back into place. The faceplate drives the clutch block to interfere with the clutch. The clutch forces the clutch block and the lock block to slide horizontally to lock the locking mechanism. The first locking protrusion passes over the second locking protrusion and returns to the locked side of the second locking protrusion, and the lock block returns to the locked position.

[0006] The locking block extends a rotating shaft toward the clutch block. The clutch block has a through hole for inserting the rotating shaft. The rotating shaft is inserted into the through hole, and a rotating part extends outward from the outer peripheral side of the rotating shaft. The hole wall of the through hole forms a rotating groove for limiting the rotation range of the clutch block. The rotating part is placed in the rotating groove and can slide along the rotating groove.

[0007] The clutch portion is formed on the base, with the upper end face of the clutch portion being a first inclined surface that slopes downwards and the lower end face of the clutch portion being a second inclined surface that slopes upwards.

[0008] The faceplate has a slot on the locking side of the second protrusion. In the locked state, the first protrusion is inserted into the slot.

[0009] The first shell has a snap-fit ​​groove, and the end of the front shell facing the snap-fit ​​groove has a hook. In the locked state, the hook engages with the snap-fit ​​groove.

[0010] The locking mechanism includes a button, which is hinged to the base via an adapter pin. The button extends a retaining part towards the base, and the base has a retaining groove on the side facing the button. When locked, the retaining part is inserted into the retaining groove, and the button latches onto the base.

[0011] The locking mechanism includes a combination wheel assembly, which includes a movable piece. The movable piece is installed on the inner side of the faceplate and can slide left and right in the horizontal direction. The movable piece extends a first limiting part toward the button, and the button extends a second limiting part toward the movable piece. When locked, the first limiting part and the second limiting part abut against each other to restrict the button from flipping. When unlocked, the first limiting part and the second limiting part are offset in the horizontal direction to release the button from flipping restriction.

[0012] The code wheel assembly includes a code wheel, a code wheel spring, and a code wheel body. The code wheel body and the code wheel are installed on the top surface of the movable plate from top to bottom. The code wheel spring is located between the code wheel and the code wheel body. The outer periphery of the code wheel has a groove, and the top surface of the movable plate protrudes upward to form a protrusion.

[0013] When the password is incorrect, the protrusion and the groove are misaligned, and the protrusion abuts against the outer circumferential side of the code wheel; when the password is correct, the protrusion is placed in the groove, and the movable piece can slide horizontally.

[0014] The combination wheel assembly also includes a code switching component, and the locking mechanism includes a knurled pin mounted on the inner side of the housing. The knurled pin is arranged horizontally. One end of the code switching component is detachably fastened to the inner side of the housing, and the other end of the code switching component is sleeved on the outer periphery of the knurled pin. The movable piece extends an open retaining ring toward the knurled pin, and the retaining ring is sleeved on the outer periphery of the knurled pin. The knurled pin is also fitted with a return spring that drives the code switching component and the movable piece to move in the locking direction.

[0015] The lock block has a guide groove at one end facing the lock cylinder. The lock cylinder includes a rotatable lock cylinder body, and an actuating part extends from the lock cylinder body toward the guide groove and is inserted into the guide groove.

[0016] The convenient latch of the present invention has the following advantages:

[0017] (1) After the lock of this application is unlocked, the key can be pulled out, and the locking operation can be performed without inserting the key. It is simple to use and easy to operate.

[0018] (2) The overall structure of the latch is simple and compact, with high transmission efficiency and long service life. Attached Figure Description

[0019] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the latch structure in the embodiment.

[0021] Figure 2 This is an exploded view of the latch in the embodiment.

[0022] Figure 3 This is a schematic diagram of the structure after the first housing, the second housing, and the base are hidden by the latch in the embodiment.

[0023] Figure 4 This is a schematic diagram of the base structure in the embodiment.

[0024] Figure 5 This is an exploded view of the password wheel assembly in the locked state in the embodiment.

[0025] Figure 6 This is a schematic diagram of the structure of the movable piece in the embodiment.

[0026] Figure 7 This is a schematic diagram of the password wheel assembly in the unlocked state in the embodiment.

[0027] Figure 8 This is a schematic diagram of the cryptographic wheel assembly in a non-switching state in the embodiment.

[0028] Figure 9 This is a schematic diagram of the cipher wheel assembly in the code-switching state in the embodiment.

[0029] Figure 10 This is a schematic diagram of the shell structure in the embodiment.

[0030] Figure 11 This is a schematic diagram of the assembly of the lock cylinder and lock block in the embodiment.

[0031] Figure 12 This is a schematic diagram of the lock cylinder in the locked state in the embodiment.

[0032] Figure 13 This is a schematic diagram of the lock cylinder in the unlocked state in the embodiment.

[0033] Figure 14 This is a schematic diagram of the assembly of the locking block and the clutch block in the embodiment.

[0034] Figure 15 This is a schematic diagram of the latch after it is locked, as shown in the embodiment.

[0035] Figure 16 This is a schematic diagram of the latch during the unlocking process in the embodiment.

[0036] Figure 17 This is a schematic diagram of the latch during the unlocking process in the embodiment.

[0037] Figure 18 This is a schematic diagram of the latch structure after unlocking in the embodiment.

[0038] Reference numerals: First housing 11, latch groove 111, second housing 12, handle 2, lock cylinder 3, lock cylinder body 31, lock case 32, actuating part 33, face shell 4, latch hook 41, mounting base 42, second latching protrusion 43, latching groove 44, base 5, connecting rod 50, holding groove 51, clutch part 52, first inclined surface 53, second inclined surface 54, button 6, holding part 61, second limiting part 62, combination wheel assembly 7, movable piece 70, protrusion 701, First limiting part 702, Open retaining ring 703, Unlocking groove 704, Code wheel body 71, Code wheel spring 72, Code wheel 73, Groove 731, Code switch 8, Stop block 81, Reset spring 90, Adapter pin 91, Knurled pin 92, Clutch block 101, Locking block 102, Guide groove 103, Unlocking part 104, First locking protrusion 105, Rotating shaft 106, Rotating part 107, Through hole 108, Rotating groove 109. Detailed Implementation

[0039] The present invention will be further described in conjunction with the following embodiments.

[0040] A specific embodiment of a convenient latch of the present invention is as follows: Figures 1 to 3As shown, the suitcase includes a first shell 11 and a second shell 12. When the latch of this embodiment is installed in the suitcase, the suitcase includes an upper body and a lower body. The first shell 11 is fixedly installed in the upper body, and the second shell 12 is fixedly installed in the lower body. In this embodiment, the second shell 12 is fixedly mounted with a base 5. The base 5 is hinged to a faceplate 4 that engages with the first shell 11 via an adapter pin 91. A latching groove 111 is formed on the outward-facing side of the first shell 11, and a hook 41 is formed on the end of the faceplate 4 facing the latching groove 111. In the locked state, the hook 41 engages with the latching groove 111.

[0041] In this embodiment, combined with Figure 3 and Figure 4 The adapter pin 91 is U-shaped, with one end hinged to the hinge lug of the base 5 and the other end hinged to the inner side of the faceplate 4. The inner side of the faceplate 4 is provided with a locking mechanism for engaging with the base 5. The locking mechanism includes a button 6, which is hinged to the base 5 via the adapter pin 91. Figure 3 As can be seen, both the faceplate 4 and the button 6 are hinged to the base 5 via the same adapter pin 91. This can be understood as the end of the adapter pin 91 passing through the mounting lug inside the faceplate 4 and hinged to the button 6. To enable locking, the button 6 extends a retaining part 61 towards the base 5, and the base 5 has a retaining groove 51 on its side facing the button 6. When locked, the retaining part 61 is inserted into the retaining groove 51, and the button 6 latches onto the base 5. This means that when the retaining part 61 of the button 6 latches onto the retaining groove 51 of the base 5, if the button 6 is restricted from rotating by other mechanisms, that is, neither the button 6 nor the faceplate 4 can rotate relative to the base 5, thus achieving locking.

[0042] Combination Figure 5 The locking mechanism includes a combination wheel assembly 7, which comprises a movable plate 70, a dialing wheel 73, a dialing wheel spring 72, and a combination wheel body 71. The combination wheel body 71 and the dialing wheel 73 are sequentially mounted on the top surface of the movable plate 70 from top to bottom. The dialing wheel spring 72 is located between the dialing wheel 73 and the combination wheel body 71. The hinged connection is achieved by extending a hinge shaft from the inner side of the faceplate 4 toward the movable plate 70, allowing the combination wheel body 71, the dialing wheel spring 72, and the dialing wheel 73 to be fitted onto the hinge shaft. A groove 731 is provided on the outer periphery of the dialing wheel 73 for connection. Figure 6 The top surface of the movable piece 70 protrudes upward to form a protrusion 701, and the movable piece 70 is installed on the inner side of the face shell 4. The movable piece 70 can slide left and right in the horizontal direction. The movable piece 70 extends a first limiting part 702 toward the button 6, and the button 6 extends a second limiting part 62 toward the movable piece 70.

[0043] Combination Figure 8 and Figure 9The combination wheel assembly 7 also includes a code-changing switch 8, and the locking mechanism includes a knurled pin 92 mounted on the inner side of the face shell 4, arranged horizontally. One end of the code-changing switch 8 is detachably fastened to the inner side of the face shell 4. This can be achieved by forming a mounting base 42 on the inner side of the face shell 4, mounting the connecting rod 50 on the mounting base 42, and then forming an opening structure with a fastening function at the end where the code-changing switch 8 and the connecting rod 50 are fastened. Through the cooperation of the opening structure and the connecting rod 50, a detachable connection between the code-changing switch 8 and the connecting rod 50 can be achieved. In addition, the other end of the code-changing switch 8 is sleeved on the outer periphery of the knurled pin 92. The movable piece 70 extends an open retaining ring 703 toward the knurled pin 92. The retaining ring is sleeved on the outer periphery of the knurled pin 92. The knurled pin 92 is also sleeved with a return spring 90 that drives the code-changing switch 8 and the movable piece 70 to move in the locking direction. See below. Figure 8 In the non-switching state, the top surface of the switching switch 8 extends upward to form a stop 81 that presses against the movable piece 70. The stop 81 presses upward against the movable piece 70, causing the movable piece 70 to lift the switching wheel 73, thus engaging the switching wheel 73 with the combination wheel body 71. It should be noted that the engagement between the switching wheel 73 and the combination wheel body 71 is the same as in a conventional combination wheel assembly 7; that is, when the combination wheel body 71 and the switching wheel 73 are engaged, rotation of the combination wheel body 71 will cause the switching wheel 73 to rotate, thereby selecting the combination. If the switching wheel 73 and the combination wheel body 71 are separated in height, and the combination wheel assembly 7 is in the unlocked state, the combination can be reset. In this case, rotation of the combination wheel body 71 will not cause the switching wheel 73 to rotate. Please see... Figure 9 After applying external force to separate the code switching component 8 from the connecting rod 50, the code switching component 8 is flipped by applying external force, and the code wheel assembly 7 is in the code switching state. The code switching component 8 rotates around the knurled pin 92. The rotation of the code switching component 8 will drive its stop block 81 to rotate together, so that the stop block 81 no longer abuts against the movable piece 70. The code wheel spring 72, which is in a compressed state, will use its own elastic force to drive the code wheel 73 to separate from the code wheel body 71. At this time, the code can be reset.

[0044] Combination Figures 5 to 7The locking mechanism uses a password for unlocking or locking as follows: When the password is incorrect, the protrusion 701 of the movable piece 70 is misaligned with the groove 731 of the dial wheel 73, and the protrusion 701 abuts against the outer peripheral side of the dial wheel 73. At this time, the movable piece 70 is in the locked position, the return spring 90 is in a compressed state, the first limiting part 702 of the movable piece 70 and the second limiting part 62 of the button 6 abut against each other, and the retaining part 61 of the button 6 is inserted into the retaining groove 51 of the base 5 to restrict the flipping of the button 6 and achieve the locking of the latch. When unlocking, if the password is correct, the protrusion 701 of the movable piece 70 aligns with the groove 731 of the dial wheel 73. The compressed return spring 90 will drive the movable piece 70 to move horizontally. The movable piece 70 moves to the unlock position so that the protrusion 701 is placed in the groove 731, and the first limiting part 702 of the movable piece 70 and the second limiting part 62 of the button 6 are misaligned in the horizontal direction to release the flipping restriction of the button 6 and achieve unlocking.

[0045] In this embodiment, the faceplate 4 is also provided with a lock cylinder 3. Combined with... Figure 10 and Figure 11 The inner side of the faceplate 4 has a mounting base 42. The lock cylinder 3 includes a lock housing 32 and a lock cylinder body 31 rotatable within the lock housing 32. The lock housing 32 is fixedly mounted in the mounting base 42 of the faceplate 4, while the lock cylinder body 31, like a conventional pin tumbler lock, can rotate relative to the lock housing 32. The lock cylinder 3 is provided with a lock block 102 that drives the locking mechanism (movable plate 70) to unlock. A guide groove 103 is provided at one end of the lock block 102 facing the lock cylinder 3. The lock cylinder 3 includes a rotatable lock cylinder body 31, and an actuating part 33 extends from the lock cylinder body 31 toward the guide groove 103, which is inserted into the guide groove 103. An unlocking part 104 extends from the lock block 102 toward the movable plate 70, and an unlocking groove 704 is formed on the side of the movable plate 70 facing the lock block 102. In the assembled state, the unlocking part 104 is placed in the unlocking groove 704.

[0046] Combination Figure 12 and Figure 13 When the lock cylinder 3 is unlocked, the key is inserted and the lock cylinder body 31 is rotated. The lock cylinder body 31 rotates, and its actuating part 33 cooperates with the guide groove 103 to convert the rotation of the lock cylinder body 31 into the horizontal sliding of the lock block 102. The lock block 102 slides to the left, and the unlocking part 104 of the lock block 102 will abut against the groove wall of the unlocking groove 704 and push the movable piece 70 to the left, so that the first limiting part 702 of the movable piece 70 is misaligned with the second limiting part 62 of the button 6, thereby achieving the unlocked state. When locking, the movable piece 70 slides horizontally to the right in the locking direction. The first limiting part 702 and the second limiting part 62 are aligned and abut against each other. The movable piece 70 slides, and its unlocking groove 704 abuts against the lock block 102 and moves to the right in the locking direction. The lock block 102 returns to its original position, thus achieving locking.

[0047] To enable lock cylinder 3 to automatically lock and return to its original position when unlocked without requiring a key, combined with... Figure 10 and Figure 11 The locking block 102 extends towards the face shell 4 with a first locking protrusion 105. It should be noted that the locking block 102 has an elastic deformation window located below the first locking protrusion 105. This facilitates the first locking protrusion 105 to retract inwards towards the locking block 102, thereby extending the service life of the locking block 102 and ensuring the smooth movement of the lock. The face shell 4 extends towards the locking block 102 with a second locking protrusion 43. The locking block 102 is hinged to a clutch block 101 via a hinge joint. The base 5 extends towards the clutch block 101 with a clutch portion 52. Please see... Figure 14 A pivot 106 extends from the locking block 102 toward the clutch block 101. The clutch block 101 has a through hole 108 for inserting the pivot 106. The pivot 106 is inserted into the through hole 108, and a rotating part 107 extends outward from the outer peripheral side of the pivot 106. The hole wall of the through hole 108 has a rotating groove 109 for limiting the rotation range of the clutch block 101. The rotating part 107 is placed in the rotating groove 109 and can slide along the rotating groove 109. As a preferred embodiment, the cross-sectional shape of the rotating groove 109 and the cross-sectional shape of the rotating part 107 adopt a fan-shaped structure.

[0048] The convenient locking mechanism described in this application operates as follows: In the locked state, please see... Figure 15 The first locking protrusion 105 is located on the locking side of the second locking protrusion 43. To unlock, insert the key and turn the lock cylinder 3 clockwise. Figure 16 The lock cylinder 3 drives the lock block 102 to slide horizontally. The first locking protrusion 105 moves past the second locking protrusion 43 to the unlocking side of the second locking protrusion 43. The clutch block 101 moves below the clutch part 52, engaging. Figure 17 Applying external force flips and unlocks the faceplate 4. The faceplate 4 causes the clutch block 101 to move towards the clutch part 52, interfering with its movement. The second locking protrusion 43 abuts against the first locking protrusion 105, restricting the locking block 102 from sliding horizontally. The clutch part 52 forces the clutch block 101 to rotate in the unlocking direction, thus engaging the clutch. Figure 18 After unlocking, the clutch block 101 rotates back towards the locking direction and is positioned above the clutch part 52. At this time, the key can be turned counterclockwise and then pulled out. Since the second locking protrusion 43 abuts against the first locking protrusion 105, restricting the sliding of the lock block 102, turning the key back and pulling out the key will not lock the latch. The entire latch remains in the unlocked state. When locking, an external force is applied to flip the face shell 4 back to its original position. The face shell 4 drives the clutch block 101 to move towards the clutch part 52. The clutch part 52 forces the clutch block 101 and the lock block 102 to slide horizontally to lock the locking mechanism. The first locking protrusion 105 passes over the second locking protrusion 43 and returns to the locking side of the second locking protrusion 43. The lock block 102 returns to its original position, thus achieving locking.

[0049] To improve the stability of the latch operation, please see Figure 4 The clutch portion 52 is formed on the base 5. The upper end surface of the clutch portion 52 is a first inclined surface 53 that slopes downward, and the lower end surface of the clutch portion 52 is a second inclined surface 54 that slopes upward. Similarly, the faceplate 4 is formed with a slot 44 located on the locking side of the second latching protrusion 43. In the locked state, the first latching protrusion 105 is inserted into the slot 44.

[0050] For user convenience in using the latch, please see Figure 2 The base 5 is hinged to a handle 2, and a torsion spring is provided between the handle 2 and the base 5 to drive the handle 2 back to its original position.

[0051] This embodiment presents a user-friendly latch. After unlocking, the key can be removed, allowing locking without a key. It is simple and convenient to use. The latch has a simple and compact overall structure, high transmission efficiency, and a long service life.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A user-friendly latch, characterized in that, It includes a first box shell and a second box shell, the second box shell is fixedly mounted with a base, and the base is hinged to a face shell that is snapped and locked with the first box shell; The inner side of the faceplate is provided with a locking mechanism that engages with the base; The faceplate is also provided with a lock cylinder, the lock cylinder is provided with a lock block that drives the locking mechanism to unlock, the lock block extends a first latching protrusion toward the faceplate, the faceplate extends a second latching protrusion toward the lock block, the lock block is hinged to a clutch block by a hinge member, and the base extends a clutch part toward the clutch block. The faceplate has a slot located on the locking side of the second latching protrusion; The locking block extends a rotating shaft toward the clutch block. The clutch block has a through hole for inserting the rotating shaft. The rotating shaft is inserted into the through hole. The outer peripheral side of the rotating shaft extends outward to form a rotating part. The hole wall of the through hole forms a rotating groove for limiting the rotation range of the clutch block. The rotating part is placed in the rotating groove and can slide along the rotating groove. The cross-sectional shape of the rotating groove and the cross-sectional shape of the rotating part adopt a fan-shaped structure. When the latch is in the locked state, the first latch protrusion is located on the locked side of the second latch protrusion, and the first latch protrusion is inserted into the latch slot; When the key is inserted and the lock cylinder is turned clockwise to unlock, the lock cylinder causes the lock block to slide horizontally. The first locking protrusion moves past the second locking protrusion to the unlocking side of the second locking protrusion, and the clutch block moves below the clutch part. If an external force is applied to flip the faceplate to unlock it, the faceplate will cause the clutch block to move toward the clutch part. The second latching protrusion abuts against the first latching protrusion, restricting the lock block from sliding in the horizontal direction. The clutch part applies a first force to the clutch block, which forces the clutch block to rotate in the unlocking direction. After unlocking, the clutch block rotates back in the locking direction and is located above the clutch part. At this time, the key can be turned counterclockwise and then pulled out. Since the second latching protrusion abuts against the first latching protrusion and restricts the sliding of the lock block, turning the key back and pulling out the key will not lock the latch. The entire latch is still in the unlocked state. When locked, an external force is applied to flip the faceplate back into place. The faceplate drives the clutch block to move toward the clutch part. The clutch part applies a second force to the clutch block. The second force forces the clutch block and the locking block to slide in the horizontal direction, so that the first locking protrusion passes over the second locking protrusion and returns to the locking side of the second locking protrusion in the slot.

2. The easy-to-use latch according to claim 1, characterized in that: The clutch portion is formed on the base, the upper end surface of the clutch portion is a first inclined surface that slopes downwards, and the lower end surface of the clutch portion is a second inclined surface that slopes upwards.

3. The easy-to-use latch according to claim 1, characterized in that: The first housing has a snap-fit ​​groove, and the end of the front shell facing the snap-fit ​​groove has a hook. In the locked state, the hook engages with the snap-fit ​​groove.

4. The easy-to-use latch according to claim 1, characterized in that: The locking mechanism includes a button, which is hinged to the base via an adapter pin. The button extends a retaining portion toward the base, and the base has a retaining groove on its side toward the button. When locked, the retaining part is inserted into the retaining slot, and the button is fastened to the base.

5. A convenient latch according to claim 4, characterized in that: The locking mechanism includes a combination wheel assembly, which includes a movable piece. The movable piece is installed on the inner side of the faceplate and can slide left and right in the horizontal direction. The movable piece extends a first limiting part toward the button, and the button extends a second limiting part toward the movable piece. When locked, the first limiting part and the second limiting part abut against each other to restrict the flipping of the button. When unlocked, the first limiting part and the second limiting part are offset in the horizontal direction to release the flipping restriction of the button.

6. A convenient latch according to claim 5, characterized in that: The cipher wheel assembly also includes a code-switching wheel, a code-switching wheel spring, and a cipher wheel body. The cipher wheel body and the code-switching wheel are installed sequentially from top to bottom on the top surface of the movable piece. The code-switching wheel spring is located between the code-switching wheel and the cipher wheel body. A groove is provided on the outer periphery of the code-switching wheel, and a protrusion is formed on the top surface of the movable piece facing upward. When the password is incorrect, the protrusion is misaligned with the groove, and the protrusion abuts against the outer peripheral side of the code wheel; When the password is correct, the protrusion is placed into the groove, and the movable piece can slide horizontally.

7. A convenient latch according to claim 5, characterized in that: The combination wheel assembly also includes a code switching component, and the locking mechanism also includes a knurled pin mounted on the inner side of the face shell. The knurled pin is arranged in a horizontal direction. One end of the code switching component is detachably fastened to the inner side of the face shell, and the other end of the code switching component is sleeved on the outer periphery of the knurled pin. The movable piece extends an open retaining ring toward the knurled pin, and the open retaining ring is sleeved on the outer periphery of the knurled pin. The knurled pin is also fitted with a return spring that drives the code switching component and the movable piece to move in the locking direction.

8. A convenient latch according to claim 1, characterized in that: The lock block has a guide groove at one end facing the lock cylinder. The lock cylinder includes a rotatable lock cylinder body. The lock cylinder body extends a toggle part towards the guide groove, and the toggle part is inserted into the guide groove.

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