CN215443572U - Buckle lock - Google Patents

Abstract

The utility model relates to the technical field of locks, in particular to a lock, which comprises a first lock seat component and a second lock seat component; the first lock seat component comprises at least two unlocking components, a first lock seat and a flip cover hinged in the first lock seat, and the flip cover is provided with a buckling mechanism buckled with the second lock seat component; one unlocking assembly is fixedly arranged on the first lock seat, and the other unlocking assembly is fixedly arranged on the flip cover; the first lock seat component is also provided with a rotatable lock block for limiting the movement of the buckling mechanism; during unlocking, any unlocking component drives the locking block to rotate, and the locking block rotates to remove the motion limitation on the buckling mechanism. Compared with the prior art, the area of the first lock seat is reduced, the structure of the first lock seat is simplified, the overall size of the padlock is reduced, and the structure of the padlock is optimized.

Description

Buckle lock

Technical Field

The utility model relates to the technical field of locks, in particular to a lock catch.

Background

For some cases, luggage or cases, a snap lock is often used as the primary locking anti-theft mechanism.

The box includes box and lower box, and traditional padlock generally all includes two lock seat subassemblies, on first lock seat subassembly fixed mounting goes up the box, the second lock seat subassembly is installed under on the box, the first lock seat subassembly of installing on the box is provided with the latch hook, and the second lock seat subassembly of installing on the box down is provided with flip that can overturn, and flip carries out the lock with the latch hook of last box, accomplishes the closure of box promptly.

In order to achieve the anti-theft performance of the padlock, the existing padlock is also provided with a code wheel assembly and a lock cylinder assembly for unlocking, and the code wheel assembly and the lock cylinder assembly are both arranged on the lock cylinder body of the second lock cylinder assembly. In order to avoid flip to receive the side direction striking and damage, current lock seat body all extends the outer surrounding part that surrounds at flip periphery side upwards, because on this lock seat body is also installed to password wheel subassembly and lock core subassembly equally, consequently, the volume of lock seat body can be great, and the structure is comparatively complicated, and the assembly is very troublesome, and the lock seat body occupies great installation space, can lead to whole padlock volume too big, inconvenient installation and use, and is not pleasing to the eye.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lock catch with small volume and compact structure aiming at the defects in the prior art.

The purpose of the utility model is realized by the following technical scheme: the application provides a padlock, which comprises a first lock seat component and a second lock seat component; the first lock seat component comprises at least two unlocking components, a first lock seat and a flip cover hinged in the first lock seat, and the flip cover is provided with a buckling mechanism buckled with the second lock seat component; one unlocking assembly is fixedly arranged on the first lock seat, and the other unlocking assembly is fixedly arranged on the flip cover; the first lock seat component is also provided with a rotatable lock block for limiting the movement of the buckling mechanism; during unlocking, any unlocking component drives the locking block to rotate, and the locking block rotates to remove the motion limitation on the buckling mechanism.

Wherein, first lock seat is equipped with the first mounting groove that is used for encircleing flip, and one of them tip of flip passes through the articulated elements and articulates in first mounting groove.

Wherein, second lock seat subassembly includes second lock seat, and second lock seat is equipped with the second mounting groove that is used for surrounding flip, and second lock seat is equipped with the second latch hook with the lock mechanism lock towards the one side of lock mechanism.

The buckling mechanism comprises a button capable of sliding along the length direction of the flip cover, and the button extends towards the second lock seat component to form a first lock hook buckled with the second lock seat component.

Wherein, one side of the button facing the lock block is outward provided with a limit part, and one side of the lock block facing the button is outward provided with an unlocking part; when locking, the unlocking part is abutted against the limiting part, so that the locking block limits the sliding of the button; when unlocking, any unlocking mechanism drives the lock block to rotate, and the unlocking part is staggered with the limiting part, so that the lock block releases the sliding limitation on the button.

Wherein, the unblock subassembly is provided with two kinds, and one of them is the lock core subassembly of installing on flip, and the other kind is the password wheel subassembly of installing on first lock seat.

Wherein, the locking piece is arranged in a circular ring shape.

The lock core assembly comprises a lock core body, the lock core body is arranged in the middle of a lock block, the peripheral side surface of the lock core body outwards extends out of a shifting part, and the inner ring surface of the lock block inwards extends out of a first rotating part; when the lock core assembly is unlocked, the lock core body is rotated, and the stirring part makes circular motion and abuts against the first rotating part of the lock block so as to rotate the lock block.

The password wheel assembly comprises a moving piece and a code adjusting wheel, the code adjusting wheel is provided with a groove, and one side of the moving piece, facing the groove, extends out of a guide part which can be inserted into the groove; the outer ring surface of the locking block extends outwards to form a second rotating part, and the movable piece extends towards the second rotating part to form a stop block positioned on the side of the second rotating part; when the lock is locked, the groove and the guide part are staggered, and the stop block is positioned on the side of the second rotating part so that the movable part can limit the rotation of the locking block; when the lock is unlocked, the password is correct, the guide part is inserted into the groove, and the stop block is staggered with the second rotating part, so that the movable part releases the rotation limitation of the lock block.

The password wheel assembly comprises a code adjusting switch and a clutch block, the clutch block is rotatably mounted on the first lock base, a clamping protrusion is formed on one side, facing the code adjusting switch, of the end of the clutch block, a clamping groove for the clamping protrusion to insert is formed in the code adjusting switch, a guide portion extends upwards from one surface, facing the moving member, of the clamping protrusion, and a chute for the guide portion to insert is formed in the bottom of the moving member; when the movable piece is unlocked, the movable piece moves to an unlocking position, the guide portion is positioned at the inlet of the clamping groove, and the clamping protrusion is separated from the clamping groove; when locking, the moving part moves to the locking position, the guide part slides to the middle part of the clamping groove, and the clamping protrusion is inserted into the clamping groove to limit the sliding of the code adjusting switch.

The utility model has the beneficial effects that: according to the padlock, one unlocking component is fixedly arranged on the first lock seat, and the other unlocking component is fixedly arranged on the flip cover, so that the area of the first lock seat is reduced, the structure of the first lock seat is simplified, the overall volume of the padlock is reduced, and the structure of the padlock is optimized.

Drawings

The utility model is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the utility model, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

Fig. 1 is a schematic structural view of a buckle lock of embodiment 1.

Fig. 2 is an exploded view of the buckle of embodiment 1.

Fig. 3 is a first exploded view of the first lock holder assembly of embodiment 1.

Fig. 4 is a second exploded view of the first lock holder assembly of embodiment 1.

Fig. 5 is a third exploded view of the first lock holder assembly of embodiment 1.

Fig. 6 is a schematic structural diagram of the first lock holder assembly according to embodiment 1 after the lock cover and the flip cover are hidden.

Fig. 7 is a schematic structural diagram of the first lock holder assembly of embodiment 1 in an up-lock state after the lock cover and the flip cover are hidden.

Fig. 8 is a schematic structural diagram of the first lock holder assembly of embodiment 1 in an unlocked state after the lock cover and the flip cover are hidden.

Fig. 9 is a schematic structural view of the buckle lock of embodiment 2.

Figure 10 is an exploded view of the code wheel assembly of example 2.

Fig. 11 is a schematic structural view of the first lock holder assembly of embodiment 2 in an unlocked state after hiding the first lock holder.

Fig. 12 is a schematic structural view of the first lock holder assembly of embodiment 2 in an up-lock state after hiding the first lock holder.

Description of the drawings: the lock core assembly comprises a first lock seat assembly 1, a first lock seat 11, a lock cover 12, a clamping part 13, a second lock seat assembly 2, a second lock seat 21, a second lock hook 22, a protrusion 23, a clamping hole 24, a flip cover 3, a limiting groove 31, a rotating shaft 32, a button 4, a first lock hook 41, a limiting part 42, a lock core assembly 5, a lock core body 51, a shifting part 52, a code wheel assembly 6, a code adjusting wheel 61, a groove 611, a code wheel 62, a wheel shaft 63, a first reset spring 71, a second reset spring 72, a third reset spring 73, a lock block 8, an unlocking part 81, a first rotating part 82, a second rotating part 83, a moving part 9, a stop block 91, a guide part 92, a chute 93, a code adjusting switch 10, a clamping groove 101, a clutch block 200, a clamping protrusion 201 and a guide part 202.

Detailed Description

The utility model is further described with reference to the following examples.

Example 1

One embodiment of a lock latch of the present invention, as shown in fig. 1 and 2, includes a first housing assembly 1 and a second housing assembly 2. The first lock holder assembly 1 comprises at least two unlocking assemblies, a first lock holder 11 and a flip 3 hinged in the first lock holder 11, and it should be noted that in the present embodiment, the unlocking assemblies are provided with two types, one type is a lock cylinder assembly 5 installed on the flip 3, and the other type is a password wheel assembly 6 installed on the first lock holder 11, besides, the lock cylinder assembly 5 can also be installed on the first lock holder 11, and the password wheel assembly 6 is installed on the flip 3, and the setting can be specifically selected according to actual requirements. Besides the combination form of the lock cylinder component 5 and the password wheel component 6, the unlocking component can also adopt an electric unlocking component to replace one unlocking component, or a group of electric unlocking components is additionally arranged. Preferably, the ratio of the volume of the first lock housing assembly to the volume of the second lock housing assembly may be 0.1-10.

In the present embodiment, in order to prevent the flip cover 3 of the latch from being damaged by lateral impact, the first lock seat 11 is provided with a first mounting groove for surrounding the flip cover 3, the second lock seat component 2 includes a second lock seat 21, the second lock seat 21 is also provided with a second mounting groove for surrounding the flip cover 3, in the locked state, the flip cover 3 is surrounded and protected by the first mounting groove and the second mounting groove, since the first lock seat 11 and the second lock seat 21 are both fixed on the luggage when being installed, and when the latch is impacted, the lock seat can effectively protect the flip cover 3. In addition, in order to avoid the flip 3 moving in the locked state, the groove bottom of the second mounting groove extends upwards to form a protrusion 23, the flip 3 is provided with a limiting groove 31 matched with the protrusion 23, and in the locked state, the protrusion 23 is inserted into the limiting groove 31 of the lock cover 12, so that the flip 3 is limited, the flip 3 is prevented from loosening in the locked state, the structure of the padlock is more compact, and the anti-theft performance is improved. In addition, the end portion of the second lock base 21 facing the first lock base 11 is provided with a clamping hole 24, the end portion of the first lock base 11 facing the second lock base 21 extends outwards to form a clamping portion 13 inserted into the clamping hole 24, and in the fastening state, the clamping portion 13 is inserted into the clamping hole 24, so that the first lock base assembly 1 is prevented from sliding relative to the second lock base assembly 2, the compactness of the fastening structure is further enhanced, and the anti-theft performance is further improved.

In this embodiment, referring to fig. 3 to 5, a lock cover 12 is detachably connected above the first lock seat 11, one end of the flip cover 3 is hinged to the lock cover 12 through a hinge, and the hinge is a rotating shaft 32. The first lock holder assembly 1 is further provided with a rotatable lock block 8, specifically, the lock block 8 is rotatably installed on the inner side surface of the flip cover 3, and the rotating shafts 32 on the two sides extend inwards and oppositely to the bottom of the lock block 8, so that the lock block 8 is hung on the ground of the flip cover 3. It should be noted that how to limit the position of the lock block 8 and how to limit the rotation angle of the lock block 8 may be specifically to continue limiting the position of the lock block 8 in a manner of clamping and matching the groove and the convex point, and may be specifically set according to actual requirements.

In the present embodiment, the second lock seat 21 is provided with a second lock hook 22, and the flip cover 3 is provided with a buckling mechanism buckled with the second lock hook 22. The buckling mechanism comprises a button 4 which can slide along the length direction of the flip cover 3, and a first locking hook 41 buckled with the second locking hook 22 extends out of one surface of the button 4 facing the second locking hook 22. When locking, the first locking hook 41 is engaged with the second locking hook 22, and for convenience of locking, an end surface of the first locking hook 41 facing the second locking hook 22 is configured as a wedge surface, and the locking can be smoothly performed by using a guiding function of the wedge surface. During the unblock, exert pressing force through the outside to button 4, button 4 drives first latch hook 41 and slides towards the unblock direction, thereby make first latch hook 41 and second latch hook 22 throw off, accomplish the unblock, in addition, carry out the return for convenience button 4, still be equipped with between flip 3 and the button 4 and order about button 4 lock the first reset spring 71 of direction motion up, the same thing, for convenience flip 3 can bounce automatically after the unblock, be equipped with between flip 3 and the first lock seat 11 and order about flip 3 towards the second reset spring 72 of unblock direction motion.

In order to limit the movement of the button 4 and thus implement the anti-theft function, in conjunction with fig. 6, the present embodiment is implemented by a mode that the locking block 8 is linked with the unlocking component. Specifically, the locking piece 8 is arranged in a circular ring shape, the locking piece 8 is located on the outer peripheral side of the lock cylinder assembly 5, but the locking piece 8 and the lock cylinder assembly 5 can move relatively, a limiting part 42 is formed on one side of the button 4 facing the locking piece 8, and an unlocking part 81 is formed on one side of the locking piece 8 facing the button 4; when locking, the unlocking part 81 abuts against the limiting part 42, so that the locking block 8 limits the sliding of the button 4; when unlocking, the lock block 8 is driven to rotate by any unlocking mechanism, and the unlocking part 81 is staggered with the limiting part 42, so that the lock block 8 releases the sliding limitation of the button 4.

In this embodiment, referring to fig. 6, the plug assembly 5 includes a plug body 51, the plug body 51 is installed in the middle of the lock block 8, the peripheral side surface of the plug body 51 extends outwards to form the striking portion 52, and the inner ring surface of the lock block 8 extends inwards to form the first rotating portion 82. When the lock cylinder assembly 5 is unlocked, the lock cylinder body 51 is rotated, and the toggle part 52 makes a circular motion and abuts against the first rotating part 82 of the lock block 8, so that the lock block 8 rotates.

In this embodiment, referring to fig. 7 and 8, the code wheel assembly 6 is a conventional wheel axle type code wheel assembly, the code wheel assembly 6 includes a movable member 9, a wheel axle 63, and a code wheel 61 sleeved on the wheel axle 63, and a code wheel 62 is clamped on an outer circumferential side surface of the code wheel 61. As an improvement, the code wheel 61 is provided with a groove 611, and one side of the movable piece 9 facing the groove 611 extends out of a guide part 92 which can be inserted into the groove 611; the outer ring surface of the locking piece 8 extends outward to form a second rotating portion 83, and the movable piece 9 extends toward the second rotating portion 83 to form a stopper 91 located at the side of the second rotating portion 83. When locking, the groove 611 and the guide part 92 are dislocated, and the stop 91 is located at the side of the second rotating part 83, so that the movable piece 9 limits the rotation of the locking piece 8; when the lock is unlocked, the code is correct, the guide portion 92 is inserted into the groove 611, and the stopper 91 is offset from the second rotating portion 83, so that the movable member 9 releases the rotational restriction of the lock block 8.

In the present embodiment, in order to automatically shift the unlocking portion 81 of the lock block 8 from the stopper 42 of the push button 4, a third return spring 73 for urging the lock block 8 to rotate in the unlocking direction is provided between the lock block 8 and the lid 3.

The working process of the padlock of the embodiment is as follows: when the lock is locked, any one unlocking component is in an unlocking state, at the moment, the unlocking part 81 of the lock block 8 is dislocated with the limiting part 42 of the button 4, an external force is applied to press the flip cover 3 to move towards the locking direction, the wedge-shaped surface of the first lock hook 41 of the button 4 can guide the button 4 to move towards the unlocking direction, when the first lock hook 41 moves to the side of the second lock hook 22, the first reset spring 71 can drive the button 4 to move towards the locking direction, so that the first lock hook 41 is buckled with the second lock hook 22, the unlocking component in the unlocking state is switched to the locking state, the unlocking part 81 of the lock block 8 abuts against the limiting part 42 of the button 4, the lock block 8 limits the sliding of the button 4, and the locking of the buckle lock is completed.

When the key is unlocked, the key is inserted into the lock cylinder body 51, the lock cylinder body 51 is rotated, the stirring part 52 of the lock cylinder body 51 can move circularly along with the lock cylinder body 51, the stirring part 52 rotates and abuts against the first rotating part 82 of the locking block 8, so that the locking block 8 rotates, the unlocking part 81 of the locking block 8 is staggered with the limiting part 42 of the button 4, the button 4 is externally pressed, the button 4 drives the first locking hook 41 to slide towards the unlocking direction, and therefore the first locking hook 41 is separated from the second locking hook 22, and unlocking is completed.

When the password is unlocked, the password is correct, the guide portion 92 of the movable member 9 is inserted into the groove 611 of the password adjusting wheel 61, so that the movable member 9 moves in the unlocking direction as a whole, the stop 91 of the movable member 9 is staggered with the second rotating portion 83 of the lock block 8, the movable member 9 releases the rotation limitation of the lock block 8, the button 4 is pressed by the outside, the button 4 drives the first lock hook 41 to slide in the unlocking direction, and the first lock hook 41 is separated from the second lock hook 22, so that the unlocking is completed.

The padlock of this embodiment through setting up one of them unblock subassembly fixed mounting on first lock seat 11, another kind unblock subassembly fixed mounting on flip 3, has reduced the area of first lock seat 11, has simplified the structure of first lock seat 11, has reduced the whole volume of padlock, has optimized the structure of padlock, and the padlock of this embodiment compact structure, structural strength is high, and the closure smoothness is good, and is small and pleasing to the eye.

Example 2

Referring to fig. 9, the main technical solution of this embodiment is the same as that of embodiment 1, and the features not explained in this embodiment adopt the explanations in embodiment 1, and are not described again here. This example differs from example 1 in that: password wheel subassembly 6 is carousel formula password wheelset, combines fig. 10, and password wheel subassembly 6 includes moving part 9 and transfers the sign indicating number wheel 61, and the top joint of transferring the sign indicating number wheel 61 has password wheel 62, and moving part 9 has been seted up and has been supplied to transfer the inserted installation position of sign indicating number wheel 61, and the medial surface of installation position is transferred the sign indicating number wheel 61 towards and is extended guide portion 92, transfers the periphery side of sign indicating number wheel 61 to set up and supply guide portion 92 male recess 611. The outer ring surface of the locking piece 8 extends outward to form a second rotating portion 83, and the movable piece 9 extends toward the second rotating portion 83 to form a stopper 91 located at the side of the second rotating portion 83. When locking, the groove 611 and the guide part 92 are dislocated, and the stop 91 is located at the side of the second rotating part 83, so that the movable piece 9 limits the rotation of the locking piece 8; when the lock is unlocked, the code is correct, the guide portion 92 is inserted into the groove 611, and the stopper 91 is offset from the second rotating portion 83, so that the movable member 9 releases the rotational restriction of the lock block 8.

In this embodiment, the combination wheel assembly 6 includes a combination switch 10 and a clutch block 200. It should be noted that the code adjusting switch 10 is located at the bottom of the movable member 9, the working principle of the conventional code adjusting switch is that the code adjusting switch cannot move when locked, the code adjusting switch can slide when unlocked, and the code adjusting switch can separate the code wheel from the code adjusting wheel in the height direction after the code adjusting switch slides, so that the code adjusting operation can be performed by rotating the code wheel; but traditional carousel formula cipher code group, it can not move about in order to realize down the yard switch of transferring of locking state, generally all can inject the motion of transferring yard switch through setting up stop gear on the locking piece, can lead to the locking piece structure more complicated like this undoubtedly, influences the structural strength of locking piece, reduces the life of padlock.

The clutch block 200 is installed on the first lock seat 11 in a rotatable manner, a locking protrusion 201 is formed on one side, facing the code adjusting switch 10, of the end of the clutch block 200, the code adjusting switch 10 is provided with a clamping groove 101 for inserting the locking protrusion 201, a guide portion 202 extends upwards from one surface, facing the movable member 9, of the locking protrusion 201, and a chute 93 for inserting the guide portion 202 is formed at the bottom of the movable member 9.

When the unlocking is carried out, the movable piece 9 moves to the unlocking position, the guide part 202 is positioned at the inlet of the clamping groove 101, the clamping protrusion 201 is separated from the clamping groove 101, and therefore the clutch block 200 releases the sliding limitation on the code switch 10. When the locking device is locked, the movable piece 9 moves to the locking position, the guide portion 202 slides to the middle of the slot 101, and the locking protrusion 201 is inserted into the slot 101 to limit the sliding of the size-adjustable switch 10.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A padlock characterized in that: the lock comprises a first lock seat assembly and a second lock seat assembly;

the first lock seat assembly comprises at least two unlocking assemblies, a first lock seat and a flip cover hinged in the first lock seat, and the flip cover is provided with a buckling mechanism buckled with the second lock seat assembly;

one unlocking assembly is fixedly arranged on the first lock seat, and the other unlocking assembly is fixedly arranged on the flip cover;

the first lock seat assembly is also provided with a rotatable lock block for limiting the movement of the buckling mechanism;

during unlocking, any unlocking assembly drives the locking block to rotate, and the locking block rotates to remove the motion limitation of the buckling mechanism.

2. A lock hasp according to claim 1 wherein: the first lock seat is provided with a first mounting groove for surrounding the flip cover, and one end of the flip cover is hinged in the first mounting groove through a hinged piece.

3. A lock hasp as claimed in claim 1 or claim 2 wherein: the second lock seat assembly comprises a second lock seat, the second lock seat is provided with a second mounting groove for surrounding the flip cover, and the second lock seat faces towards one side of the buckling mechanism and is provided with a second lock hook buckled with the buckling mechanism.

4. A lock hasp according to claim 1 wherein: the buckling mechanism comprises a button capable of sliding along the length direction of the flip cover, and the button extends towards the second lock seat component to form a first lock hook buckled with the second lock seat component.

5. A lock hasp according to claim 4 wherein: a limiting part is formed on one side of the button facing the locking piece, and an unlocking part is formed on one side of the locking piece facing the button;

when the button is locked, the unlocking part abuts against the limiting part, so that the locking block limits the sliding of the button;

when the button is unlocked, any one unlocking mechanism drives the lock block to rotate, and the unlocking part and the limiting part are staggered, so that the lock block releases the sliding limitation of the button.

6. A lock hasp according to claim 1 wherein: the unblock subassembly is provided with two kinds, and one of them is for installing lock core subassembly on the flip, and the other kind is for installing password wheel subassembly on the first lock seat.

7. A lock hasp according to claim 6 wherein: the locking piece is arranged in a circular ring shape.

8. A lock hasp according to claim 7 wherein: the lock core assembly comprises a lock core body, the lock core body is arranged in the middle of the lock block, the peripheral side surface of the lock core body extends outwards to form a shifting part, and the inner ring surface of the lock block extends inwards to form a first rotating part;

when the lock core assembly is unlocked, the lock core body is rotated, and the stirring part does circular motion and abuts against the first rotating part of the locking block, so that the locking block rotates.

9. A lock hasp according to claim 6 wherein: the code wheel assembly comprises a moving piece and a code adjusting wheel, the code adjusting wheel is provided with a groove, and the moving piece extends out of one side, facing the groove, of the moving piece to form a guide part which can be inserted into the groove;

a second rotating part extends outwards from the outer ring surface of the locking block, and a stop block located on the side of the second rotating part extends towards the second rotating part from the movable piece;

when the lock is locked, the groove and the guide part are staggered, and the stop block is positioned on the side of the second rotating part so that the movable part can limit the rotation of the lock block;

when the lock is unlocked, the password is correct, the guide part is inserted into the groove, and the stop block and the second rotating part are staggered, so that the movable part releases the rotation limitation of the lock block.

10. A lock hasp according to claim 9 wherein: the password wheel assembly comprises a code adjusting switch and a clutch block, the clutch block is rotatably mounted on the first lock seat, a clamping protrusion is formed on one side, facing the code adjusting switch, of the end portion of the clutch block, a clamping groove for the clamping protrusion to insert is formed in the code adjusting switch, a guide portion extends upwards from one surface, facing the moving member, of the clamping protrusion, and a chute for the guide portion to insert is formed in the bottom of the moving member;

when the movable piece is unlocked, the movable piece moves to an unlocking position, the guide portion is located at the inlet of the clamping groove, and the clamping protrusion is separated from the clamping groove;

when the locking device is locked, the movable piece moves to a locking position, the guide portion slides to the middle of the clamping groove, and the clamping protrusion is inserted into the clamping groove to limit the sliding of the code adjusting switch.

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