Mortise lock

Abstract

The utility model provides a mortise lock which comprises a first lock body used for being connected with a latch structure, the first lock body is provided with a fixing ring, and the fixing ring comprises a locking part; the pushing block is arranged in the first lock body, the pushing block comprises a locking matching part, and the pushing block can move relative to the fixing ring; the first elastic piece is connected with the fixing ring and used for abutting against the pushing block after the locking part and the locking matching part are separated; the knob can drive the pushing block to rotate relative to the first lock body and is used for driving the shifting fork of the second lock body to rotate; in a locking state, the locking part and the locking matching part are mutually locked; in the unlocking state, the pushing block moves in the direction away from the fixing ring, the locking part is separated from the locking matching part, the first elastic piece abuts against the pushing block, and the rotary knob is used for driving the pushing block and the shifting fork to rotate relative to the first lock body. According to the technical scheme, in the unlocking process, torsion is provided mainly through the rotary knob, large torsion borne by the key is reduced, and meanwhile the situation that the key deforms can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of locks, in particular to a plug-in core lock. BACKGROUND

[0002] When the existing lock is unlocked, the key directly rotates the lock tongue knob of the lock body to unlock, so that the key bears a large torsion force, which causes the key to be twisted, broken and deformed for a long time, resulting in that the subsequent key cannot be inserted into the lock core. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a plug-in core lock, which mainly provides torsion force through the knob during the unlocking process, reduces the large torsion force borne by the key, and can also reduce the deformation of the key.

[0004] In order to solve the above technical problems, the present application adopts the following technical solutions:

[0005] In a first aspect, the present application provides a plug-in core lock, comprising: a first lock body configured to be connected with a door latch structure, the first lock body is provided with a fixing ring, the fixing ring comprises a locking part;

[0006] A push block is arranged in the first lock body, the push block comprises a locking matching part matched with the locking part, the push block is movable relative to the fixing ring and separated from the fixing ring;

[0007] A first elastic member is connected with the fixing ring, the first elastic member is used for abutting against the push block after the locking part and the locking matching part are separated; a knob is in contact with the push block and can drive the push block to rotate relative to the first lock body, the knob is used for driving the rotation of a yoke of a second lock body; in a locked state, the locking part and the locking matching part are locked to each other to limit the rotation of the push block; in an unlocked state, the push block moves away from the fixing ring, the locking part is separated from the locking matching part, the first elastic member abuts against the push block, the locking part is limited to contact the locking matching part, and the knob is used for driving the rotation of the push block and the yoke relative to the first lock body.

[0008] As an embodiment, the plug-in core lock further comprises a rotatable member arranged in the knob, the rotatable member and the push block are both provided with second locking structures matched with each other, in the locked state, the rotatable member and the push block are locked to each other; in the unlocked state, the rotatable member rotates independently relative to the knob, and the rotatable member and the push block are separated from each other.

[0009] As an implementation form, the fixing ring comprises a positioning portion protruding in a radial direction, the first elastic member is sleeved on an outer periphery of the fixing ring and abuts against the positioning portion, and the first lock body is provided with a positioning slot and a positioning notch matched with the positioning portion.

[0010] As an implementation form, the locking portion comprises at least one first notch, the first elastic member comprises a limiting portion arranged towards the pushing block and located at a position of the first notch, the locking matching portion protrudes in a length direction of the pushing block, and a number of the locking matching portions corresponds to a number of the first notches; in a locked state, the locking matching portion is located in the first notch, and the limiting portion is attached to an end face of the locking matching portion in a protruding direction; in an unlocked state, the locking matching portion is away from the first notch, and a side of the limiting portion towards the pushing block is used for abutting against the locking matching portion.

[0011] As an implementation form, the locking matching portion is provided with an abutting area towards a side of the limiting portion, the limiting portion comprises a pressing segment and two inclined segments located at two ends of the pressing segment, and the two inclined segments respectively extend outward from different directions away from a center of the first elastic member.

[0012] As an implementation form, the first elastic member further comprises a ring-shaped body and a connecting segment, two ends of the connecting segment are respectively connected with the ring-shaped body and the pressing segment, and the connecting segment extends in a radial direction of the ring-shaped body and inclines inward.

[0013] As an implementation form, the plug-in core lock further comprises a second elastic member, the second elastic member is arranged in the knob, one end of the second elastic member abuts against the knob, and the other end abuts against the pushing block.

[0014] As an implementation form, the knob comprises a handle portion and an insertion portion connected with the handle portion, the insertion portion is used for being inserted into the first lock body, the fixing ring is located at an outer periphery of the insertion portion, the insertion portion is provided with a through hole extending in an axial direction of the insertion portion, the through hole corresponds to the first notch, the locking matching portion protrudes from the through hole and is movable along the through hole, and in the locked state, the locking matching portion protruding from the through hole is located in the first notch.

[0015] As an implementation form, the number of the first notches is two; the plug-in core lock further comprises a rotating ring, the rotating ring is arranged on the outer periphery of the insertion part, the rotating ring comprises a ring body and two first bosses connected with the ring body, a second boss is further arranged on the ring body, the fixed ring is provided with a second notch corresponding to the second boss; in the locked state, the first bosses are matched with the locking matching parts and located in the first notches, the connecting line of the two first bosses intersects with the connecting line of the two locking matching parts, and the second boss is located in the second notch; in the unlocked state, the first bosses are matched with the locking matching parts for abutting against the limiting part, the push block can be independently rotated relative to the rotating ring, and one of the locking matching parts abuts against the second boss and drives the rotating ring to rotate synchronously.

[0016] As an implementation form, the rotating ring is further provided with a third boss, the third boss is located on the two sides of the first boss respectively, and the fixed ring is provided with a third notch corresponding to the third boss.

[0017] As an implementation form, on the same ring body, the arc length between the second boss and the first boss is greater than the arc length between the third boss and the first boss below.

[0018] As an implementation form, the periphery of the insertion part is further provided with a positioning block, the rotating ring is provided with a positioning area matched with the positioning block; one end of the positioning block towards the fixed ring is configured to be a first distance from one end of the fixed ring, and the first distance is greater than the axial length of the rotating ring.

[0019] As an implementation form, the push block comprises a push body, two ends of the push body are respectively provided with the locking matching parts; the plug-in core lock further comprises a limiting block, the limiting block is connected with the push body, the limiting block is arranged in a spaced manner with the locking matching parts, and the limiting block is used for axially limiting the rotating ring.

[0020] As an implementation form, the first lock body is further provided with a relief space for the elastic deformation of the limiting part.

[0021] As an implementation form, the first lock body is further provided with at least one stop block, the stop block is located on one side of the limiting block, and is used for limiting the rotation of the rotating knob in a set direction in the unlocked state.

[0022] The technical scheme of the application has the following beneficial effects:

[0023] The plug-in core lock comprises a first lock body connected with a door latch structure, a fixing ring is arranged on the first lock body, the fixing ring comprises a locking part; a push block is arranged in the first lock body, the push block comprises a locking matching part capable of matching the locking part, and the locking part and the locking matching part can be matched and locked; the push block can also move relative to the fixing ring and separate from the fixing ring; a first elastic member connected with the fixing ring is further arranged, the first elastic member can abut against the push block after the locking part and the locking matching part are separated, so as to limit the locking part from contacting the locking matching part; a rotary knob is further arranged, the rotary knob is in contact with the push block; in the locked state, the locking part and the locking matching part are locked with each other, the fixing ring cannot rotate with the first lock body, the rotation of the push block is limited, and the rotary knob cannot be rotated to be unlocked; in the unlocked state, the push block moves in the direction away from the fixing ring, the locking part and the locking matching part are separated, the first elastic member abuts against the push block, and the locking part is limited from contacting the locking matching part; at this time, the rotary knob is rotated to drive the push block to rotate, the rotary knob is connected with a yoke of the second lock body, the rotary knob can drive the yoke to rotate, the rotation of the yoke can drive a locking bolt structure on the door latch structure to be unlocked, so that the plug-in core lock in the embodiment of the application is realized by rotating the rotary knob in the unlocking process, and the unlocking driven by the key is cancelled, the torsion borne by the key is reduced, and the deformation of the key is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 The structure diagram of the plug-in core lock connected with the door latch structure provided by the embodiment of the present application is shown.

[0026] Figure 2 The explosion structure diagram of the plug-in core lock and the door latch structure provided by the embodiment of the present application is shown.

[0027] Figure 3 The explosion structure diagram of the plug-in core lock and the door latch structure provided by the embodiment of the present application is shown.

[0028] Figure 4 The explosion structure diagram of the plug-in core lock and the door latch structure provided by the embodiment of the present application is shown.

[0029] Figure 5 The explosion structure diagram of the plug-in core lock provided by the embodiment of the present application is shown.

[0030] Figure 6A cross-sectional structure schematic view of the plug-in core lock in the unlocking state is provided for the embodiment of the present application.

[0031] Figure 7 A cross-sectional structure schematic view of the plug-in core lock in the locking state is provided for the embodiment of the present application.

[0032] Figure 8 A partial structure schematic view of the plug-in core lock in the locking state is provided for the embodiment of the present application.

[0033] Figure 9 A partial structure schematic view of the plug-in core lock in the unlocking state is provided for the embodiment of the present application.

[0034] Figure 10 A schematic view of the plug-in core lock in the unlocking state with a small angle rotation is provided for the embodiment of the present application.

[0035] Figure 11 A relative position schematic view of the fixed ring, the rotating ring and the pushing block of the plug-in core lock in the unlocking state is provided for the embodiment of the present application.

[0036] Figure 12 A relative position schematic view of the fixed ring, the rotating ring and the pushing block of the plug-in core lock in the unlocking state with the knob rotating 90 degrees clockwise is provided for the embodiment of the present application.

[0037] Figure 13 A relative position schematic view of the fixed ring, the rotating ring and the pushing block of the plug-in core lock in the unlocking state with the knob rotating 180 degrees clockwise is provided for the embodiment of the present application.

[0038] Figure 14 A relative position schematic view of the fixed ring, the rotating ring and the pushing block of the plug-in core lock in the unlocking state with the knob rotating 360 degrees clockwise is provided for the embodiment of the present application.

[0039] Figure 15 A relative position schematic view of the fixed ring, the rotating ring and the pushing block of the plug-in core lock in the unlocking state with the knob rotating 360 degrees clockwise and then rotating 180 degrees counterclockwise is provided for the embodiment of the present application.

[0040] Figure 16 A structure schematic view of the first lock body is provided for the embodiment of the present application.

[0041] Figure 17 A cross-sectional structure schematic view of the plug-in core lock is provided for the embodiment of the present application.

[0042] Icon: 1 - first lock body; 11 - positioning groove; 12 - avoiding space; 13 - stop block; 2 - second lock body; 21 - pull fork; 3 - door latch structure; 4 - second lock cylinder; 5 - fixing ring; 51 - positioning part; 52 - first notch; 53 - second notch; 54 - third notch; 6 - push block; 61 - locking matching part; 611 - abutting area; 7 - rotary knob; 71 - insertion part; 711 - through hole; 72 - positioning block; 8 - rotatable piece; 9 - first elastic piece; 91 - limiting part; 911 - compression section; 912 - inclined section; 92 - connecting section; 10 - second elastic piece; 14 - rotary ring; 141 - first boss; 142 - second boss; 143 - third boss; 15 - limiting block. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0044] It should be noted that similar reference numerals and letters refer to similar items throughout the accompanying drawings, and thus once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] The plug core lock provided by the embodiments of the present application can be matched with the original second lock body 2 without modifying the original second lock body 2, and can cancel the direct unlocking of the lock tongue by the key in the unlocking and locking process, thereby reducing the large torsion force suffered by the key and reducing the problem of key deformation.

[0046] As Figures 1 to 3, 8 and 9, the mortise lock comprises a first lock body 1 connected with the door latch structure 3, the first lock body 1 is provided with a fixing ring 5, the fixing ring 5 comprises a locking part; further comprising a push block 6, the push block 6 is arranged in the first lock body 1, the push block 6 comprises a locking matching part 61 capable of cooperating with the locking part, the locking part and the locking matching part 61 can be locked with each other; of course, the push block 6 can also move relative to the fixing ring 5, separate from the fixing ring 5, and realize unlocking; the mortise lock further comprises a first elastic member 9 connected with the fixing ring 5, the first elastic member 9 can abut against the push block 6 after the locking part and the locking matching part 61 are separated, so as to limit the locking part and the locking matching part 61 from contacting; further comprising a rotary knob 7, the rotary knob 7 is in contact with the push block 6; in the locking state, the locking part and the locking matching part 61 are locked with each other, and the fixing ring 5 and the first lock body 1 are connected with the door latch structure 3 and cannot rotate, so as to limit the rotation of the push block 6, and the rotary knob 7 cannot rotate to unlock; in the unlocking state, the push block 6 moves away from the fixing ring 5, the locking part and the locking matching part 61 are separated, the first elastic member 9 abuts against the push block 6, and the locking part and the locking matching part 61 are limited from contacting, at this time, the rotary knob 7 can rotate freely, the rotary knob 7 drives the push block 6 to rotate by rotating, the rotary knob 7 is connected with the yoke of the second lock body 2, the rotary knob 7 can drive the yoke 21 to rotate, the yoke 21 rotating can drive the locking bolt on the door latch structure 3 to unlock, so that the mortise lock in the embodiment of the application is realized by rotating the rotary knob 7 in the unlocking process, and the rotation unlocking by the key is cancelled, the torsion force borne by the key is reduced, and the deformation of the key is further reduced.

[0047] As shown in Figure 4 and 5 , optionally, the first lock body 1 is connected with the door latch structure 3 through the second lock body 2, the first lock body 1 is inserted and matched with the second lock body 2, and one end of the rotary knob 7 can be connected with the first lock cylinder in the second lock body 2 through positioning cooperation, and then connected with the yoke 21, so that the rotary knob 7 can be used to realize locking and unlocking.

[0048] Optionally, since the door latch structure 3 is fixed, the first lock body 1 and the fixing ring 5 are also fixed.

[0049] Optionally, the second lock body 2 can be a lock body structure in the prior art, and the second lock body 2 is connected with the door latch structure 3, the second lock body 2 comprises the yoke 21, when the yoke rotates, the original locking bolt on the door latch structure 3 can be unlocked, wherein the locking bolt on the door latch structure 3 comprises at least two of an inclined locking bolt, a square locking bolt or a cylindrical locking bolt.

[0050] In the prior art, the plug-in core lock is mostly a plug-in core lock directly driven by a lock cylinder. Since the lock body exerts a torsion on the lock cylinder, the lock cylinder bears a large torsion, which causes the displacement of the pin to be unable to be unlocked. In the plug-in core lock of the embodiment of the present application, the lock cylinder does not bear a large torsion during unlocking and locking, but the torsion is transferred to the external rotary knob 7, thereby prolonging the service life of the lock cylinder.

[0051] In the prior art, the whole operation of the existing lockset to unlock and lock is complex, and the omission of the operation causes the lockset to be not completely locked, especially after unlocking, the rotary knob 7 cannot be reversed to achieve the locking of the lockset, and the lock cylinder needs to be operated again to achieve the locking. In the plug-in core lock of the embodiment of the present application, the rotary knob 7 can be directly rotated to achieve the locking during the locking.

[0052] As shown in Figures 4 to 7 As an embodiment, the plug-in core lock further comprises a rotatable member 8 arranged in the rotary knob 7. The rotatable member 8 and the push block 6 are provided with second locking structures matched with each other. In the locked state, the rotatable member 8 and the push block 6 are locked with each other. In the unlocked state, the rotatable member 8 is independently rotated relative to the rotary knob 7, and the rotatable member 8 and the push block 6 are separated from each other.

[0053] As shown in Figure 4 and 6 Optionally, the rotary knob 7 is further provided with a second lock cylinder 4. The second lock cylinder 4 can be a lock cylinder structure in the prior art. One end of the second lock cylinder 4 is connected with the rotatable member 8, and the other end of the second lock cylinder 4 is further provided with a wireless code sheet arranged beside the key hole of the second lock cylinder 4 to provide a unique ID code for the lockset. When the computer key is inserted into the second lock cylinder 4, the wireless code sheet is identified, and the ID code of the lockset is identified. If the ID code of the lockset is consistent with the ID code of the lockset authorized by the computer key, the operation permission of the lockset is obtained. If the ID code is not consistent, the operation permission cannot be obtained, and the lockset cannot be operated.

[0054] As shown in Figure 5 and 6 Optionally, the second locking structure comprises a helical section. One end of the rotatable member 8 towards the push block 6 is provided with a helical section, and the other end of the push block 6 towards the rotatable member 8 is also provided with a helical section matched with each other. In the locked state, the push block 6 and the rotatable member 8 are inserted into the corresponding cutout positions of the helical sections and are in contact with each other. In the unlocked state, the computer key is inserted into the second lock cylinder 4, the rotatable member 8 is controlled to rotate by driving the second lock cylinder 4 in the rotary knob 7, the push block 6 is pushed away from the fixed ring 5 by the helical section, and then is abutted by the first elastic member 9.

[0055] As a possible implementation, the pushing block 6 can also be pushed away from the fixed ring 5 by a button push, for example, a structure for unlocking by pushing a button is arranged in the first lock body 1, the button is pushed before unlocking, and the direct movement directly pushes the pushing block 6 to move away from the fixed ring 5, and the pushing block 6 is separated from the fixed ring 5 and abuts against the first elastic member 9.

[0056] Optionally, the design angle of the helical section of the second locking structure can be designed to be 180 degrees clockwise to separate the pushing block 6 from the fixed ring 5, that is, the computer key is inserted into the second lock cylinder 4, and when it is rotated by 180 degrees, the pushing block 6 is abutted by the first elastic member 9; of course, in actual operation, when it is rotated by 170 degrees, the pushing block 6 has been separated from the fixed ring 5 and is abutted by the first elastic member 9. At this time, since the knob 7 can be freely rotated, the rotatable member 8 and the second lock cylinder 4 can also be idling, and the computer key can be pulled out by 180 degrees or 360 degrees clockwise.

[0057] As shown in Figure 5 , optionally, the rotatable member 8 and one end of the second lock cylinder 4 can be connected through a special-shaped structure.

[0058] As shown in Figure 3 , 5 , 6 and 8, as an implementation, the fixed ring 5 includes a positioning portion 51 protruding in the radial direction, the first elastic member 9 is sleeved on the outer periphery of the fixed ring 5 and abuts against the positioning portion 51, thereby improving the stability between the first elastic member 9 and the fixed ring 5 and axially limiting the first elastic member 9; the first lock body 1 is provided with a positioning groove 11 and a positioning notch matched with the positioning portion 51, so that the fixed ring 5 and the first lock body 1 can be stably connected, and the situation that the fixed ring 5 rotates with the first lock body 1 is reduced.

[0059] Optionally, the positioning portion 51 is located at one end close to the second lock cylinder 4, and the first elastic member 9 is directed towards the pushing block 6, so that the first elastic member 9 can abut against the pushing block 6.

[0060] As shown in Figure 5 , optionally, the first elastic member 9 is a non-closed ring structure, which can be conveniently sleeved on the outer periphery of the fixed ring 5.

[0061] Optionally, the fixed ring 5 can be embedded in the first lock body 1, the two positioning portions 51 correspond to the positioning groove 11 and the positioning notch respectively, and the locking portion is inserted into the first lock body 1 to facilitate cooperation with the pushing block 6 for locking.

[0062] As shown in Figure 3 , 5As shown in FIGS. 7, as an embodiment, the locking portion includes at least one first notch 52, the first elastic member 9 includes a limiting portion 91, the limiting portion 91 is arranged towards the pushing block 6, and is located at the position of the first notch 52; the locking matching portion 61 is protrudingly arranged along the length direction of the pushing block 6, so that the locking matching portion 61 can be located in the first notch 52 and lockingly match with the first notch 52, the number of the locking matching portion 61 corresponds to the number of the first notch 52, so that the corresponding lockingly matching of the pushing block 6 and the fixed ring 5 can be achieved;

[0063] As shown in FIGS. 7, as an embodiment, the locking portion includes at least one first notch 52, the first elastic member 9 includes a limiting portion 91, the limiting portion 91 is arranged towards the pushing block 6, and is located at the position of the first notch 52; the locking matching portion 61 is protrudingly arranged along the length direction of the pushing block 6, so that the locking matching portion 61 can be located in the first notch 52 and lockingly match with the first notch 52, the number of the locking matching portion 61 corresponds to the number of the first notch 52, so that the corresponding lockingly matching of the pushing block 6 and the fixed ring 5 can be achieved; Figure 7 and 8 As shown in FIGS. 7, as an embodiment, the locking portion includes at least one first notch 52, the first elastic member 9 includes a limiting portion 91, the limiting portion 91 is arranged towards the pushing block 6, and is located at the position of the first notch 52; the locking matching portion 61 is protrudingly arranged along the length direction of the pushing block 6, so that the locking matching portion 61 can be located in the first notch 52 and lockingly match with the first notch 52, the number of the locking matching portion 61 corresponds to the number of the first notch 52, so that the corresponding lockingly matching of the pushing block 6 and the fixed ring 5 can be achieved; Figure 6 and 9 As shown in FIGS. 7, as an embodiment, the locking portion includes at least one first notch 52, the first elastic member 9 includes a limiting portion 91, the limiting portion 91 is arranged towards the pushing block 6, and is located at the position of the first notch 52; the locking matching portion 61 is protrudingly arranged along the length direction of the pushing block 6, so that the locking matching portion 61 can be located in the first notch 52 and lockingly match with the first notch 52, the number of the locking matching portion 61 corresponds to the number of the first notch 52, so that the corresponding lockingly matching of the pushing block 6 and the fixed ring 5 can be achieved;

[0064] As shown in FIGS. 7, as an embodiment, the locking portion includes at least one first notch 52, the first elastic member 9 includes a limiting portion 91, the limiting portion 91 is arranged towards the pushing block 6, and is located at the position of the first notch 52; the locking matching portion 61 is protrudingly arranged along the length direction of the pushing block 6, so that the locking matching portion 61 can be located in the first notch 52 and lockingly match with the first notch 52, the number of the locking matching portion 61 corresponds to the number of the first notch 52, so that the corresponding lockingly matching of the pushing block 6 and the fixed ring 5 can be achieved;

[0065] As shown in FIGS. 7, as an embodiment, the locking portion includes at least one first notch 52, the first elastic member 9 includes a limiting portion 91, the limiting portion 91 is arranged towards the pushing block 6, and is located at the position of the first notch 52; the locking matching portion 61 is protrudingly arranged along the length direction of the pushing block 6, so that the locking matching portion 61 can be located in the first notch 52 and lockingly match with the first notch 52, the number of the locking matching portion 61 corresponds to the number of the first notch 52, so that the corresponding lockingly matching of the pushing block 6 and the fixed ring 5 can be achieved;

[0066] As shown in FIGS. 7, as an embodiment, the locking portion includes at least one first notch 52, the first elastic member 9 includes a limiting portion 91, the limiting portion 91 is arranged towards the pushing block 6, and is located at the position of the first notch 52; the locking matching portion 61 is protrudingly arranged along the length direction of the pushing block 6, so that the locking matching portion 61 can be located in the first notch 52 and lockingly match with the first notch 52, the number of the locking matching portion 61 corresponds to the number of the first notch 52, so that the corresponding lockingly matching of the pushing block 6 and the fixed ring 5 can be achieved;

[0067] As a preferred embodiment, the locking portion can also include two first notches 52, which are oppositely arranged respectively, and the locking matching portion 61 is also correspondingly provided with two, when the limiting portion 91 abuts against the locking matching portion 61, the knob 7 can be rotated by 180 degrees to be unlocked, when the knob 7 is rotated by 180 degrees, the two locking matching portions 61 are inverted to each other and are aligned with the two first notches 52 respectively, and the pushing block 6 has pushed away the first elastic member 9, and can be locked with the fixed ring 5, so that the plug lock can be unlocked by the knob 7, and the knob 7 can be automatically locked after being unlocked; similarly, in this scheme, when the knob 7 is rotated by 180 degrees, it is actually in the locked state, therefore, the second lock body 2 as the prior art needs to be designed to rotate the pulling fork 21 by not more than 170 degrees to unlock all the locking bolts of the door latch structure 3, and since the knob 7 is automatically locked after being rotated by 180 degrees, the pushing block 6 needs to be pushed by the rotatable member 8 at this time, so that the knob 7 can be reversely rotated by 180 degrees to realize the locking function.

[0068] As shown in Figure 3 and 4 , as an embodiment, the locking matching portion 61 is provided with an abutting area 611 on the side facing the limiting portion 91, by arranging the abutting area 611, the limiting portion 91 is facilitated to abut against the pushing block 6; the limiting portion 91 includes a pressing section 911 and inclined sections 912 located at both ends of the pressing section 911, the pressing section 911 is used to press and fit with the locking matching portion 61 in the locked state, and can stop and limit the locking matching portion 61 in the unlocked state; the two inclined sections 912 respectively extend outward from different directions away from the center of the first elastic member 9, that is, when the first elastic member 9 is placed horizontally, the inclined sections 912 are outside the annular body by observing from the top view, so that when the pushing block 6 is rotated by the knob 7, the locking matching portion 61 will be out of the limitation of the limiting portion 91, the pushing block 6 will be pushed by the second elastic member 10 to move towards the fixed ring 5, and at this time the locking matching portion 61 is out of position with the first notch 52, the pushing block 6 cannot be locked with the fixed block, and the knob 7 continues to rotate to make the pushing block 6 rotate along the edge of the end of the fixed ring 5, and the inclined sections 912 extend outward away from the center of the first elastic member 9, when the pushing block 6 rotates by half a circle or a circle, the locking matching portion 61 can be pushed away by the inclined sections 912, so as to facilitate the locking matching portion 61 to be inserted into the first notch 52, and the pressing section 911 can be pressed and fitted on the end face of the locking matching portion 61 in the protruding direction.

[0069] As shown in Figure 10As shown, optionally, each limiting portion 91 includes two inclined segments 912, because when the knob 7 is rotated clockwise, the user does not want to unlock when the knob 7 is not rotated by 180 degrees or 360 degrees, the knob 7 can be reversed, and the locking portion 61 can push away the inclined segment 912 on the right side; when the knob 7 continues to rotate by 180 degrees or 360 degrees, the inclined segment 912 on the left side can be continuously pushed away; the left and right sides are defined from the perspective of the user during the unlocking process.

[0070] Optionally, when the first elastic member 9 is installed on the first lock body 1, and the limiting portion 91 is provided with one, the two inclined segments 912 on the upper side extend upwardly in different directions, respectively; when the limiting portion 91 is provided with two, the inclined segment 912 on the upper side extends upwardly, and the inclined segment 912 on the lower side extends downwardly.

[0071] Optionally, the abutting area 611 makes the locking portion 61 have a stepped structure on the side facing the fixed ring 5.

[0072] Optionally, the fixed ring 5 is provided with a stepped structure on the end facing the locking portion 61, which can be matched and clamped with the abutting area 611, so that the pushing block 6 is further pushed to abut against the fixed ring 5, and when the knob 7 drives the pushing block 6 to rotate relative to the fixed ring 5, it is more stable.

[0073] As shown in Figure 3 and 9 As an embodiment, the first elastic member 9 further includes a ring-shaped body and a connecting segment 92, the two ends of the connecting segment 92 are connected with the ring-shaped body and the compression segment 911, respectively, and the connecting segment 92 extends inwardly and inclines along the radial direction of the ring-shaped body, so that the limiting portion 91 is arranged in a narrow manner when it is not pushed away by the locking portion 61, and thus when the locking portion 61 is separated from the locking portion, the connecting segment 92 can make the compression segment 911 abut against the abutting area 611.

[0074] Optionally, the connecting segment 92 on the upper side extends downwardly, and the connecting segment 92 on the lower side extends upwardly.

[0075] As shown in Figure 4 , 5 , 7 and 10, as an embodiment, the mortise lock further includes a second elastic member 10, which is arranged in the knob 7, one end of the second elastic member 10 abuts against the knob 7, and the other end abuts against the pushing block 6; by arranging the second elastic member 10, when the pushing block 6 is pushed to separate from the fixed ring 5, the pushing block 6 compresses the second elastic member 10; when the knob 7 drives the pushing block 6 to rotate, the second elastic member 10 restores the elastic force, so that the pushing block 6 abuts against the fixed ring 5, but at this time the locking portion 61 is misaligned with the first notch 52, and the abutting area 611 of the pushing block 6 abuts against the stepped structure of the fixed ring 5; as shown inFigure 8 As shown, when the push block 6 is rotated by 180 degrees, the locking matching part 61 pushes away the limiting part 91 through the inclined section 912, the locking matching part 61 is aligned with the first notch 52, the push block 6 is pushed into contact with the fixed ring 5 through the second elastic member 10, the locking part and the locking matching part 61 are locked with each other, and the second locking structure of the push block 6 and the rotatable part 8 are also in contact with each other, so as to realize the automatic locking of the rotary knob 7 after unlocking; when locking is needed, the second lock cylinder 4 is driven to rotate through the computer key, so that the rotatable part 8 pushes away the push block 6 again, and the rotary knob 7 is reversed by 180 degrees to realize the locking process, thereby reducing the torque borne by the key during the locking process.

[0076] As shown in Figure 3 and 4 , as an embodiment, the rotary knob 7 comprises a handle part and an insertion part 71 connected with the handle part, the insertion part 71 is used for insertion into the first lock body 1, the handle part is located outside the first lock body 1, which is convenient for a user to rotate and operate the rotary knob 7; the fixed ring 5 is located outside the periphery of the insertion part 71, the insertion part 71 is provided with a through hole 711 extending along the axial direction of the insertion part 71, the through hole 711 corresponds to the first notch 52, and the locking matching part 61 protrudes from the through hole 711, so that the rotary knob 7 can abut against the locking matching part 61 when rotating and drive the push block 6 to rotate synchronously; by providing the through hole 711, when the push block 6 is rotated and pushed away by the rotatable part 8 in the unlocked state, the push block 6 can change the rotary motion into linear motion and move axially along the through hole 711 to separate from the fixed ring 5; in the locked state, the locking matching part 61 protruding from the through hole 711 is located in the first notch 52, and the push block 6 is locked with the fixed ring 5.

[0077] Optionally, the through hole 711 is provided with two through holes, and the two through holes are oppositely arranged, so that part of the insertion part 71 is a through structure, and the two ends of the push block 6 can pass through the two through holes respectively.

[0078] As shown in Figure 3 , 11 , as an embodiment, the number of the first notches 52 is two; the plug lock further comprises a rotating ring 14, the rotating ring 14 is arranged outside the periphery of the insertion part 71, the rotating ring 14 comprises a ring body and two first bosses 141 connected with the ring body, and a second boss 142 is further arranged on the ring body, and the fixed ring 5 is provided with a second notch 53 corresponding to the second boss 142; as shown in Figure 11 , in the locked state, the first boss 141 is matched with the locking matching part 61 and located in the first notch 52, and the connecting line of the two first bosses 141 intersects with the connecting line of the two locking matching parts 61, and the second boss 142 is located in the second notch 53;

[0079] As shown in Figure 6 , 9As shown, in the unlocked state, the pushing block 6 drives the rotating ring 14 away from the first gap 52, the first boss 141 is used to abut against the limiting portion 91, and the knob 7 can drive the pushing block 6 to rotate independently relative to the rotating ring 14. During the rotation of the pushing block 6, since the connecting line of the two first bosses 141 intersects with the connecting line of the two locking portions 61, the rotating ring 14 does not rotate synchronously, as shown in Figure 12 and 13 As shown, one of the locking portions 61 will abut against the second boss 142 first and drive the rotating ring 14 to rotate synchronously, and at this time, after rotating 360 degrees, as shown in Figure 14 the pushing block 6 and the rotating ring 14 cannot be locked with the fixed ring 5, and the first boss 141, the second boss 142 and the locking portion 61 are staggered, so as to realize the purpose that the knob 7 will not be automatically locked after rotating 360 degrees, and then realize the purpose of locking after reversing the knob 7 by 360 degrees. During the entire locking process, it is controlled by the knob 7. Compared with the automatic locking of the knob 7 after rotating 360 degrees, the rotating ring 14 can reduce the operation of the computer key during the locking process, avoid the deformation of the computer key, and also reduce the operation steps during the locking process; also reduce the large torsion of the lock cylinder, and transfer the torsion to the external knob 7, thereby prolonging the service life of the lock cylinder.

[0080] Optionally, most of the first lock cylinder structures of the prior art generally unlock all the locking bolts of the door latch structure 3 after rotating 360 degrees, and cannot continue to rotate, so that the plug core lock of the embodiment of the application can be adapted to most of the first lock cylinders, thereby improving the application scenarios of the plug core lock.

[0081] As shown in Figure 11 Optionally, the intersection of the connecting line of the two first bosses 141 and the connecting line of the two locking portions 61 means that, in the clockwise direction, the upper locking portion 61 is in front of the upper first boss 141, and the lower locking portion 61 is in the rear of the lower first boss 141, so that when the second boss 142 is located on the right side of the ring body, the upper locking portion 61 can abut against the second boss 142 first; if the second boss 142 is located on the left side of the ring body, the lower locking portion 61 can abut against the second boss 142 first.

[0082] For example, assuming that the second protrusion 142 is arranged in the clockwise direction of the two first protrusions 141, that is, the second protrusion 142 is located on the right side and at the middle position of the ring body, the upper first protrusion 141 is referred to as the upper protrusion, and the lower first protrusion 141 is referred to as the lower protrusion, the pushing block 6 is rotated clockwise to prepare for unlocking, the rotating ring 14 does not rotate with the pushing block 6, the upper locking matching part 61 preferentially collides with the second protrusion 142 and synchronously rotates the rotating ring 14, and after one rotation, the upper first gap 52 corresponds to the locking matching part 61 and the second protrusion 142, at this time, the pushing block 6, the rotating ring 14 and the fixed ring 5 are staggered and cannot be locked, and the knob 7 cannot be locked. Meanwhile, due to the limitation of the first lock cylinder in the prior art, the knob 7 cannot be rotated after 360 degrees of rotation, but it is ensured that the knob 7 cannot be automatically locked, and the automatic locking can be realized by rotating the knob 7 by 360 degrees, so that the knob 7 cannot be automatically locked after 360 degrees of rotation, but is reversed to the initial position to realize automatic locking, and the first lock cylinder does not need to be driven by the computer key during the locking process, thereby reducing the locking steps.

[0083] As shown in Figures 11 to 14 , of course, the second protrusion 142 is arranged in the counterclockwise direction of the two first protrusions 141, that is, arranged on the right side, and the principle is the same, only that when the pushing block 6 is rotated clockwise, the lower locking matching part 61 preferentially collides with the second protrusion 142, and due to the limitation of the lock cylinder in the prior art, the knob 7 cannot be rotated after 360 degrees of rotation, as shown in Figure 15 , and the knob 7 cannot be locked after being reversed by 180 degrees, and the automatic locking can be realized by being reversed by 360 degrees.

[0084] Optionally, the structure of the first protrusion 141 is the same as that of the locking matching part 61.

[0085] Optionally, when the knob 7 drives the pushing block 6 to rotate, the rotating ring 14 can rotate with the pushing block 6 or not, and in general, the rotating ring 14 will not rotate with the pushing block 6, because the rotating ring 14 can only synchronously rotate with the pushing block 6 when the knob 7 is initially rotated by a small angle, and cannot rotate with the pushing block 6 in the subsequent rotation process, and the rotating ring 14 has no direct connection with the pushing block 6, that is, the rotating ring 14 is a separate part for the pushing block 6 and the knob 7.

[0086] In one possible implementation, the friction between the rotating ring 14 and the pushing block 6 causes the knob 7 to rotate with the rotating ring 14 when the knob 7 is rotated, and in the case that the rotating ring 14 rotates with the pushing block 6, the knob 7 is automatically locked after 360 degrees of rotation, at this time, the pushing block 6 needs to be pushed away by the computer key, so that the knob 7 can be reversed for locking.

[0087] As shown in Figure 5As shown, as an embodiment, the rotating ring 14 is further provided with a third boss 143, which is located on the two sides of the first boss 141 respectively; the fixing ring 5 is provided with a third notch 54 corresponding to the third boss 143; by arranging the third boss 143, the rotating ring 14 can be balanced when abutting against the fixing ring 5, so that the rotating ring 14 is more stable when rotating, avoiding the situation of jamming.

[0088] As shown in Figure 11 and 12 As shown, as an embodiment, the arc length between the second boss 142 and the first boss 141 on the same ring body is greater than the arc length between the third boss 143 and the first boss 141 below, so that when the push block 6 rotates clockwise in the unlocked state, the lower locking matching part 61 will preferentially collide with the second boss 142, thereby driving the rotating ring 14 to rotate synchronously; the arc length between the second boss 142 and the two first bosses 141 can be 90 degrees, and the arc length between the third boss 143 and the first boss 141 below can be 70 degrees, so that the lower locking matching part 61 can collide with the second boss 142 first, and after rotating 360 degrees, the push block 6 will not be automatically locked, that is, after the knob 7 rotates 360 degrees clockwise to unlock, it will not be automatically locked, but can be rotated 360 degrees to achieve automatic locking, reducing the operation steps when locking; it can also achieve that the knob 7 rotates how many degrees clockwise to unlock, and needs to be rotated corresponding angle to lock.

[0089] At the same time, it also achieves that the plug core lock rotates how many degrees clockwise to unlock, and rotates corresponding angle counterclockwise to lock.

[0090] For example, Figure 11 is the initial state; Figure 12 is that the push block 6 rotates 90 degrees clockwise, and the lower locking matching part 61 will preferentially collide with the second boss 142, while the upper locking matching part 61 cannot collide with the third boss 143; Figure 13 is that the push block 6 rotates 180 degrees, Figure 14 is that the push block 6 rotates 360 degrees, at this time, the locking matching part 61, the first boss 141, the second boss 142 and the third boss 143 are completely staggered with the first notch 52, the second notch 53 and the third notch 54, so as to achieve that after the knob 7 rotates 360 degrees, the push block 6 will not be pushed into the locking with the fixing ring 5 by the second elastic member 10, and the situation that the knob 7 cannot rotate occurs; the knob 7 is rotated back, Figure 15 is rotated back 180 degrees, at this time, the second boss 142 and the third boss 143 are located on different sides respectively, the second notch 53 and the third notch 54 are at different heights and cannot be inserted into the second notch 53 and the third notch 54, thereby limiting the rebound of the push block 6, and it needs to be continuously rotated back 180 degrees to achieve complete locking.

[0091] As shown in Figure 3 , as an embodiment, the periphery of the insertion part 71 is also provided with a positioning block 72, and the rotating ring 14 is provided with a positioning area matched with the positioning block 72; one end of the positioning block 72 towards the fixed ring 5 is configured with the fixed ring 5 at a first distance, and the first distance is greater than the axial length of the rotating ring 14. By setting the positioning block 72, when the push block 6 is pushed away and the knob 7 has not been rotated, the positioning block 72 can make the knob 7 rotate the rotating ring 14 and the push block 6 together. After the knob 7 is rotated by a small angle, the rotating ring 14 and the push block 6 are pushed by the second elastic member 10 and abut against the edge of the fixed ring 5. At this time, the rotating ring 14 is located between the positioning block 72 and the fixed ring 5, the positioning block 72 does not contact the rotating ring 14, and the rotating ring 14 will not rotate synchronously with the knob 7. Only when the locking matching part 61 abuts against the second boss 142, the rotating ring 14 can be driven to rotate synchronously.

[0092] As shown in Figure 10 , optionally, when the push block 6 and the rotating ring 14 abut against the limiting part 91, the knob 7 can be rotated clockwise by 20 degrees to drive the rotating ring 14 and the push block 6 to rotate synchronously. At this time, the first boss 141 and the locking matching part 61 will be separated from the abutment of the limiting part 91, and abut against the edge of the fixed ring 5 through the second elastic member 10.

[0093] As shown in Figure 4 and 5 , as an embodiment, the push block 6 comprises a push body, and the two ends of the push body are respectively provided with a locking matching part 61; the plug lock further comprises a limiting block 15 connected with the push body, and the limiting block 15 is arranged in a spaced manner with the locking matching part 61, for axially limiting the rotating ring 14. In the unlocked state, when the second elastic member 10 pushes the push block 6, the limiting block 15 cooperates with the push block 6 to enable the rotating ring 14 to move synchronously and abut against the fixed ring 5; in the locked state, the rotatable member 8 can also be pushed away synchronously, and simultaneously move axially along the through hole 711.

[0094] Optionally, the limiting block 15 is connected with the push body through a positioning pin.

[0095] As shown in Figure 3 , as an embodiment, the first lock body 1 is also provided with an avoiding space 12 for elastic deformation of the limiting part 91. By setting the avoiding space 12, there is a deformation space when the limiting part 91 is pushed away.

[0096] As shown in Figure 16 and 17 , as an embodiment, the first lock body 1 is also provided with at least one stop block 13 located on one side of the limiting block 15, for limiting the rotation of the knob 7 in a set direction in the unlocked state.

[0097] Optionally, the stop block 13 makes the knob 7 only rotate clockwise when just unlocked, and when rotating 20 degrees clockwise, the locking matching part 61 is disengaged from the limit of the first boss 141, the limiting block 15, the rotating ring 14 and the pushing block 6 are pushed by the second elastic member 10 to move towards the fixed ring 5, the stop block 13 is not in contact with the limiting block 15, and the knob 7 can be freely rotated.

[0098] Optionally, the length of the stop block 13 extending along the first lock body 1 in the axial direction cannot be too long, that is, the stop block 13 only limits the rotation of the knob 7 in a certain direction when the first boss 141 and the locking matching part 61 are pushed by the rotatable member 8 to abut against the limiting part 91, because the distance between the rotating ring 14, the pushing block 6 and the fixed block is the farthest at this time, and the knob 7 needs to be rotated to be unlocked at this time, when the knob 7 is rotated by a small angle, which can be 20 degrees, the first boss 141 and the locking matching part 61 are disengaged from the limit of the limiting part 91, the pushing block 6 is pushed by the second elastic member 10, the first boss 141 and the locking matching part 61 are both clamped with the fixed ring 5, and the stop block 13 is not in contact with the limiting block 15, that is, during the unlocking process, the stop block 13 cannot affect the free rotation of the limiting block 15 and the knob 7.

[0099] The above only describes the embodiments of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0100] The above only describes the embodiments of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0101] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

Claims

1. A mortise lock characterized by, The plug-in core lock comprises: a first lock body configured to be connected with a door latch structure, the first lock body being provided with a fixing ring, the fixing ring comprising a locking portion; a push block arranged in the first lock body, the push block comprising a locking matching portion configured to be matched with the locking portion, the push block being movable relative to the fixing ring and being separated from the fixing ring; a first elastic member connected with the fixing ring, the first elastic member being configured to abut against the push block after the locking portion and the locking matching portion are separated; a knob configured to contact the push block and drive the push block to rotate relative to the first lock body, the knob being configured to drive a yoke of a second lock body to rotate; a locked state in which the locking portion and the locking matching portion are locked to each other to restrict the push block from rotating; an unlocked state in which the push block is moved away from the fixing ring, the locking portion is separated from the locking matching portion, the first elastic member abuts against the push block, the locking portion is restricted from contacting the locking matching portion, and the knob is configured to drive the push block and the yoke to rotate relative to the first lock body.

2. The mortise lock according to claim 1, wherein The plug-in core lock further comprises a rotatable member arranged in the knob, the rotatable member and the push block are both provided with second locking structures configured to be matched with each other, the locked state is that the rotatable member and the push block are locked to each other, and the unlocked state is that the rotatable member is independently rotatable relative to the knob and the rotatable member is separated from the push block.

3. Mortice lock according to claim 1 or 2, characterized in that The fixing ring comprises a positioning portion protruding in a radial direction, the first elastic member is sleeved on an outer periphery of the fixing ring and abuts against the positioning portion; The first lock body is provided with a positioning slot and a positioning notch configured to be matched with the positioning portion.

4. The mortise lock according to claim 3, wherein, The locking portion comprises at least one first notch, the first elastic member comprises a limiting portion arranged towards the push block and located at a position of the first notch, the locking matching portion protrudes in a length direction of the push block, and a number of the locking matching portions corresponds to a number of the first notches; In the locked state, the locking matching portion is located in the first notch, and the limiting portion is attached to an end face of the locking matching portion protruding in a direction; In the unlocked state, the locking matching portion is away from the first notch, and a side of the limiting portion towards the push block is configured to abut against the locking matching portion.

5. The mortise lock according to claim 4, wherein, A side of the locking matching portion towards the limiting portion is provided with an abutting area; The limiting portion comprises a compression section and two inclined sections located at two ends of the compression section, the two inclined sections respectively extend outward from different directions away from a center of the first elastic member.

6. The mortise lock according to claim 5, wherein, The first elastic member further comprises a ring-shaped body and a connecting section, two ends of the connecting section are respectively connected with the ring-shaped body and the compression section, and the connecting section extends inwardly and obliquely along a radial direction of the ring-shaped body.

7. The mortise lock according to claim 1 or 2, wherein The plug-in core lock further comprises a second elastic member arranged in the knob, one end of the second elastic member abuts against the knob, and the other end of the second elastic member abuts against the push block.

8. The mortise lock according to any one of claims 4 to 6, wherein The knob comprises a handle part and an insertion part connected with the handle part, the insertion part is used for insertion into the first lock body, the fixing ring is located at the outer periphery of the insertion part, the insertion part is provided with a through hole extending along the axial direction of the insertion part, the through hole corresponds to the first notch, the locking matching part protrudes from the through hole and can move along the through hole; In the locked state, the locking matching part protrudes from the through hole and is located in the first notch.

9. The mortise lock according to claim 8, wherein, The number of the first notches is two; The plug-in core lock further comprises a rotating ring, the rotating ring is arranged at the outer periphery of the insertion part, the rotating ring comprises a ring body and two first bosses connected with the ring body, a second boss is further arranged on the ring body, and the fixing ring is provided with a second notch corresponding to the second boss; In the locked state, the first boss matches with the locking matching part and is located in the first notch, the connecting line of the two first bosses intersects with the connecting line of the two locking matching parts, and the second boss is located in the second notch; In the unlocked state, the first boss is used for abutting against the limiting part with the locking matching part, the push block can independently rotate relative to the rotating ring, one of the locking matching parts abuts against the second boss and drives the rotating ring to rotate synchronously.

10. The mortise lock according to claim 9, wherein, The rotating ring is further provided with a third boss, the third boss is located on the two sides of the first boss respectively from the second boss; The fixing ring is provided with a third notch corresponding to the third boss.

11. The mortise lock according to claim 10, wherein, On the same ring body, the arc length between the second boss and the first boss is greater than the arc length between the third boss and the first boss below.

12. The mortise lock according to any one of claims 9 to 11, wherein, The periphery of the insertion part is further provided with a positioning block, the rotating ring is provided with a positioning area matched with the positioning block; one end of the positioning block towards the fixing ring is configured with a first distance from one end of the fixing ring, and the first distance is greater than the axial length of the rotating ring.

13. The mortise lock according to any one of claims 9 to 11, wherein, The push block comprises a push body, and the two ends of the push body are respectively provided with the locking matching parts; The plug-in core lock further comprises a limiting block, the limiting block is connected with the push body, and the limiting block is arranged in space apart from the locking matching parts and used for axially limiting the rotating ring.

14. The mortise lock according to any one of claims 4 to 6, wherein The first lock body is further provided with a avoiding space for the elastic deformation of the limiting part.

15. The mortise lock according to claim 13, wherein, The first lock body is further provided with at least one stop block, the stop block is located on one side of the limiting block and used for limiting the rotation of the knob in a set direction in the unlocked state.

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