CN217681080U - Lock tongue mechanism and lock body using same - Google Patents

Abstract

A lock bolt mechanism and a lock body applied by the same are used for locking a door leaf and comprise a bolt box body, an inclined lock bolt, a push block and a push block spring; the oblique spring bolt comprises a bolt box cavity, a bolt hole, an oblique spring bolt, a lock shell, a spring bolt mechanism, a door handle and a lock core, wherein the bolt box body is provided with a bolt box cavity and a bolt hole, the oblique spring bolt comprises a bolt left end region and a bolt right end region, the oblique spring bolt, the push block and the spring bolt are sequentially arranged in the bolt box cavity, the oblique spring bolt mechanism comprises the lock shell and the spring bolt mechanism arranged in the lock shell, the door handle and the lock core are movably arranged on the lock shell and are linked with the spring bolt mechanism, the lock core is used for locking or unlocking the swing locking state of the oblique spring bolt, and the door handle can rotate so as to unlock the swing locking state of the oblique spring bolt.

Description

Lock tongue mechanism and lock body using same

Technical Field

The invention relates to the technical field of locks, in particular to a telescopic and turnable bolt mechanism and a lock body applied to the same.

Background

The lockset is a common accessory in home decoration, and the opening and the locking of the door and the window can be well controlled by installing the lockset on the door and the window. The common lockset structure comprises an inclined bolt which can stretch and move, and the inclined bolt extends out and is combined with a buckling hole on a door frame so as to lock a door and a window; the door is opened by rotating the door handle to drive the inclined bolt to move inwards and retract. In order to let the door and window switching more convenient, people improve the lockset, chinese utility model patent like publication No. CN207761428U discloses a scalable and pivoted spring bolt, including casing assembly and tongue body subassembly, tongue body subassembly includes tongue body, telescopic platform and spring, and spring one end is fixed in casing assembly's bottom, and telescopic platform is connected to the other end, and the tongue body rotationally adorns on telescopic platform, and is flexible along with telescopic platform, tongue body both sides have the ear of rectangular form protruding, with the ear is protruding to match, has rectangular locking groove on the lock shell, blocks the ear protruding after the bayonet lock inserts locking groove, makes the tongue body can not rotate. The structure can enable the lock tongue to rotate and retract to open the door through the sliding door, and the experience of opening and closing the door is well improved.

In order to reliably reset and extend the lock tongue to the locking distance, the spring needs to have a large enough pushing force to ensure that the lock tongue is popped out and reset, but the lock tongue collides with the shell assembly, so that high noise is generated, and the rest of family members is influenced particularly when people are quiet at night. Chinese utility model patent that bulletin number is CN213175178U discloses a spring bolt mechanism, and it includes housing assembly, spring, push rod, spring bolt body and silencing device establish in housing assembly, on the push rod was located to the spring housing, housing assembly was extended to the one end of push rod, and silencing device and the one end contact of spring bolt body are passed through to the other end of push rod, silencing device is the attenuator. The bolt mechanism can slow down the reset speed of the push rod, thereby reducing the noise in the process of opening and closing the door lock. However, the silencing device is arranged between the lock tongue body and the push rod, and the three parts are continuously collided and extruded to damage the silencing device, so that the silencing device fails, and the lock tongue mechanism is blocked to open and close the door and window in serious conditions.

Disclosure of Invention

Although the convenience of opening and closing of a door and window can be improved by using the telescopic rotating inclined lock tongue, the inclined lock tongue can perform two actions when the inclined lock tongue is popped outwards and reset, the inclined lock tongue which horizontally slides collides with the shell to generate primary noise, and the rotating inclined lock tongue can perform secondary collision with the shell to generate secondary noise; the inclined lock tongue comprises an inclined lock tongue body, a push block and a push block spring, wherein the inclined lock tongue body is provided with a tongue box cavity and a tongue hole, the inclined lock tongue comprises a tongue left end area and a tongue right end area, the inclined lock tongue, the push block and the push block spring are sequentially arranged in the tongue box cavity, the push block spring pushes the push block to be kept leftwards, the push block pushes the inclined lock tongue to be kept leftwards and can push the tongue left end area of the inclined lock tongue to extend out of the tongue box body from the tongue hole, the push block and the tongue right end area of the inclined lock tongue can be relatively slidably abutted together, and after the tongue left end area of the inclined lock tongue extends out of the tongue box body, the inclined lock tongue can be extruded and retracted into the tongue box cavity and can also swing relative to the tongue box body and the push block; the push block is characterized in that a rotatable gear is arranged on the push block, the gear is not in contact with an inclined lock tongue and a push block spring, a rack is arranged on the tongue box body, when the inclined lock tongue or the push block spring pushes the push block to move left and right, the push block also drives the gear to move left and right, and the gear is simultaneously in meshing transmission with the rack.

The tongue box body comprises an upper box wall body, a lower box wall body and a left side wall body located between the upper box wall body and the lower box wall body, the tongue box cavity is arranged between the upper box wall body, the lower box wall body and the left side wall body, and the tongue hole is arranged on the left side wall body. In order to limit the extending distance of the inclined lock tongue, the width or height of the tongue hole is smaller than the tongue right end area of the inclined lock tongue; in order to enable the inclined lock tongue, the push block and the push block spring to be conveniently installed in the tongue box cavity, part of the wall body is of a detachable structure.

The inclined lock tongue is a component which can be combined with or separated from an external matched lock groove through sliding or swinging, and is rhombic when viewed transversely, the left end area of the inclined lock tongue is provided with two inclined surfaces which are acute angles, namely a first front inclined slope surface and a second front inclined slope surface, and the right end area of the inclined lock tongue is provided with two inclined surfaces which are acute angles, namely a first rear inclined slope surface and a second rear inclined slope surface; after the left end area of the inclined lock tongue extends out of the tongue box body, the first front inclined slope surface is basically parallel to the upper box wall body, and the second front inclined slope surface is obliquely arranged; the first front inclined slope surface is parallel to the second rear inclined slope surface, the second front inclined slope surface is parallel to the first rear inclined slope surface, and the upper box wall body and the lower box wall body are arranged in parallel and used for limiting the inclined lock tongue to move up and down; when the inclined lock tongue is subjected to lateral extrusion force from left to right, the inclined lock tongue can be retracted into the tongue box cavity in a translation manner. In addition, the first front sloping surface and the first rear sloping surface are in smooth transition connection, the transition connection part between the first front sloping surface and the first rear sloping surface forms an upper sliding matching surface, the second front sloping surface and the second rear sloping surface are in smooth transition connection, and the transition connection part between the second front sloping surface and the second rear sloping surface forms a lower sliding matching surface; the upper sliding matching surface and the lower sliding matching surface are matched to form a fulcrum of the inclined lock tongue swinging along the front direction or the rear direction. The oblique spring bolt is arranged go up box wall body, between the box wall body down, work as when the oblique spring bolt receives the effort of upper and lower direction, oblique spring bolt with go up box wall body, box wall body down for supporting the luffing motion the upper and lower swing in-process of oblique spring bolt go up sliding fit face, lower sliding fit face can respectively with go up box wall body, box wall body down and form sliding connection. Furthermore, after the inclined lock tongue swings downwards, the first front inclined slope is arranged in an inclined mode, and acting force applied to the inclined lock tongue in the original up-down direction can form component force in the left-right direction, so that the inclined lock tongue slides into the tongue box cavity from left to right.

The gear is a component which is arranged on the push block and moves along with the push block, and the gear and the rack are in meshing transmission to increase the moving resistance of the push block so as to reduce the moving speed of the push block and form a buffering effect. Further, the gear may be a damping gear to increase the moving resistance; on the other hand, the gear is installed and limited on the push block and does not directly touch the inclined bolt, so that repeated extrusion of the gear can be effectively reduced.

According to the technical scheme, compared with the prior art, the invention has the beneficial technical effects that: first, the gear setting is in on the ejector pad, the gear is contactless with oblique spring bolt, ejector pad spring, is favorable to guaranteeing the gear can rotate freely. Secondly, the moving speed of the push block can be effectively reduced by arranging the gears and the racks which are meshed with each other, so that the speed of the inclined lock tongue moving leftwards is reduced, the impact force of collision of the inclined lock tongue and the tongue box body is effectively reduced, and the noise generated during stamping is reduced; on the other hand, the slow movement is also beneficial to keeping the push block and the inclined lock tongue in a connected state, and the collision noise generated by frequent separation and combination in the moving process of the push block and the inclined lock tongue is reduced; thirdly, the mutually meshed gear and rack enable the push block to move back and forth along the arrangement direction of the rack, so that the push block and the inclined lock tongue can stably move back and forth along a fixed path; and fourthly, the bolt mechanism capable of sliding and swinging in a translation manner can realize door opening only through the swinging of the inclined bolt and the rightward sliding when the door leaf is opened, so that the door opening action can be realized without rotating or rotating the door handle with a small force, and the convenience of door opening is greatly improved.

In order to lock the door leaf after the door leaf is closed, the door leaf locking device further comprises a brake arranged on the outer side of the tongue box body, and the brake is used for combining the inclined lock tongue to stop the inclined lock tongue from swinging. The brake is plate-shaped, the jack capable of avoiding the brake is arranged on the tongue box body, the inclined spring bolt is provided with a slot capable of receiving the brake, and when the brake is inserted into the tongue box cavity through the jack, the brake can be combined with the slot on the inclined spring bolt to stop the inclined spring bolt from swinging. Under the state of limiting the swing of the inclined lock tongue, the left end area of the inclined lock tongue keeps an extending state under the action of the push block and the push block spring, so that the door leaf keeps a closed state.

The door leaf is closed in two states, wherein one state is a windproof closing state, namely the door can be opened by rotating the handle after being closed, the other state is a locking closing state, the door can be opened only by matching a key with the rotating handle, and in order to enable the lock tongue mechanism to realize the two states, the lock further adopts the technical scheme that the lock further comprises a lock shell, an opening part is arranged on one side of the lock shell, the tongue box body is arranged in the lock shell, and the tongue hole is opposite to the opening part, so that the left end area of the tongue of the inclined lock tongue can not only extend out of the tongue hole but also extend out of the opening part; the lock shell is internally provided with a handle shifting fork related to a door handle and a lock cylinder shifting fork related to a lock cylinder, the brake arranged in the lock shell comprises a first brake and a second brake, the first brake and the second brake are respectively arranged at the front side and the rear side of the lock cylinder body, the first brake is a normally closed mechanism and automatically keeps combined with the inclined lock cylinder to stop the inclined lock cylinder from swinging, the first brake is related to the handle shifting fork and can shift the first brake to leave the inclined lock cylinder through the handle shifting fork when the door handle is rotated so as to relieve the normally closed state, the second brake is a normally open mechanism and automatically keeps leaving the inclined lock cylinder, and the second brake is related to the lock cylinder shifting fork and can shift the second brake to combine with the inclined lock cylinder through the lock cylinder shifting fork so as to realize locking. Obviously, the two brakes can be used in cooperation to realize two states of closing the door leaf, in the windproof closed state, the first brake is in a normally closed state, and the second brake is in a normally open state, so that the door can be opened by rotating the door handle; in the locking and closing state, the first brake is in a normally closed state, the second brake is switched to a locking state, the second brake cannot leave the inclined lock tongue by rotating the door handle, and the second brake can leave the inclined lock tongue by a key or by shifting the lock cylinder shifting fork in the door so as to switch the lock tongue mechanism to a wind-proof and closing state.

In order to enable the brake to be better combined with the inclined bolt, a further technical scheme may be that the brake further includes a first return spring, the first return spring is disposed between the first brake and the lock housing, and the first return spring is used for driving the first brake to be combined with the inclined bolt.

The brake further comprises a second return spring, the second return spring is arranged between the second brake and the lock shell, and the second return spring is used for driving the second brake to be combined with the inclined bolt; the lock cylinder shifting fork is rotatably arranged in the lock shell, a shifting rod is arranged on the lock cylinder, one end of the lock cylinder shifting fork is connected with the shifting rod of the lock cylinder, the other end of the lock cylinder shifting fork is connected with the second brake, and when the shifting rod shifts the lock cylinder shifting fork to rotate in the forward direction, the lock cylinder shifting fork can drive the second brake to overcome the acting force of the second return spring to leave the inclined lock tongue and enable the second brake to keep a normally open state; when the poking rod pokes the lock cylinder shifting fork to rotate reversely, the lock cylinder shifting fork can release the second brake and enable the second brake to be combined to the inclined lock tongue under the action force of the second return spring.

Due to the advantages of the latch bolt mechanism, the latch bolt mechanism can be applied to a lock body, the lock body comprises a lock shell, the latch bolt mechanism arranged in the lock shell, and a door handle and a lock cylinder which are movably arranged on the lock shell and are linked with the latch bolt mechanism, the lock cylinder is used for locking or releasing the swing locking state of the inclined latch bolt, and the door handle can rotate so as to release the swing locking state of the inclined latch bolt.

The invention has the characteristics and advantages, so the invention can be applied to the bolt mechanism and the lock body thereof.

Drawings

Fig. 1 is a schematic view of an exploded structure of the door leaf;

fig. 2 is an exploded view of the deadbolt mechanism;

fig. 3 is a schematic structural view of a front section of the latch bolt mechanism, showing the state that the inclined latch bolt extends;

fig. 4 is a schematic structural view of a front section of the latch bolt mechanism, which shows a state after the inclined latch bolt swings;

FIG. 5 is a schematic view of the structure of the oblique locking bolt in the axial direction;

fig. 6 is a schematic structural diagram of the latch bolt mechanism from the top view, showing a state that the first brake and the second brake are both combined with the inclined latch bolt;

fig. 7 is a schematic top view of the latch mechanism, showing the first actuator engaged with the inclined latch bolt and the second actuator disengaged from the inclined latch bolt;

fig. 8 is a schematic structural diagram of the latch bolt mechanism in a top view, which shows a state that the first brake and the second brake are both separated from the inclined latch bolt.

Detailed Description

The lock body is generally used for controlling the locking of a door leaf, in practical application, a door frame is installed on a wall body, the door leaf 11 is hinged to the door frame and can rotate to open and close, the lock body is installed on the door leaf 11, and a lock tongue mechanism is arranged on the lock body. The bolt mechanism comprises a movable inclined bolt 2, a lock groove matched with the inclined bolt 2 is formed in the door frame, and when the door leaf 11 rotates and is combined with the door frame, the inclined bolt 2 can be inserted into the lock groove so as to close the door leaf 11. In order to facilitate the opening and closing of the door leaf 11, an outer door handle 31 and an inner door handle 32 which are rotatably arranged on the inner side and the outer side of the door leaf 11 are arranged on the lock body; in order to enable the door leaf 11 to be locked after being closed and to prevent the door leaf 11 from being opened from the outside by the outer door handle 31, the lock body is further provided with a lock cylinder 13, the lock cylinder 13 can be rotated to a locking position to limit the outer door handle 31 from being unlocked, and the lock cylinder 13 can be driven to rotate away from the locking position only by a key matched with the lock cylinder 13 to open the door.

The structure of the latch bolt mechanism applying the technical scheme of the invention is further explained by combining the attached drawings. Various implementation details disclosed below may be either selectively applied or combined in one embodiment, even if not directly related or synergistic in functional terms, except where expressly specified as being equivalent or alternative embodiments.

As shown in fig. 1 to 3, the latch mechanism for locking the door leaf 11 includes a latch box 4, an inclined latch 2, a push block 5 and a push block spring 51; the tongue box body 4 comprises an upper box wall body 41, a lower box wall body 42 and a left side wall body 43 positioned between the upper box wall body 41 and the lower box wall body 42, a tongue box cavity 40 is formed between the upper box wall body 41, the lower box wall body 42 and the left side wall body 43, as shown in the figure, the tongue box body 4 further comprises a right side wall body 44 arranged opposite to the left side wall body 43, a front side wall body 45 and a rear side wall body 46 connected between the left side wall body 43 and the right side wall body 44, and the inclined lock tongue 2, the push block 5 and the push block spring 51 are sequentially arranged in the tongue box cavity 40; for the convenience of installation, the right sidewall 44 is detachably mounted and connected to the upper sidewall and the lower sidewall by screws or fasteners. The push block spring 51 is arranged between the push block 5 and the right side wall body 44, and the push block spring 51 pushes the push block 5 to be kept leftward. A tongue hole 430 is further formed in the left side wall body 43, the inclined locking tongue 2 includes a tongue left end region 21 and a tongue right end region 22, and the push block 5 pushes the inclined locking tongue 2 to be left-held and can push the tongue left end region 21 of the inclined locking tongue 2 to extend out of the tongue box body 4 from the tongue hole 430. Since the front and rear sides of the tongue right end region 22 are respectively provided with the front boss 221 and the rear boss 222, the front and rear widths of the front boss 221 and the rear boss 222 are greater than the front and rear widths of the tongue hole 430, and the extension distance of the tongue left end region 21 of the oblique tongue 2 can be controlled by providing the front boss 221 and the rear boss 222.

After the left end area 21 of the inclined bolt 2 extends out of the bolt box body 4 under the action of the push block 5, the inclined bolt 2 can slide and retract into the bolt box cavity 40 when the inclined bolt 2 is subjected to extrusion force in the direction opposite to the push block 5. And oblique spring bolt 2 with go up box wall body 41, leave certain clearance between the box wall body 42, go up box wall body 41, box wall body 42 down just can do in order to let the limiting plate of oblique spring bolt 2 up-and-down direction lets like this oblique spring bolt 2 can follow the free steady slip of upper and lower wall body. On the other hand, the upper box wall body 41 and the lower box wall body 42 can also be used as a swing support surface of the inclined bolt 2, and the push block 5 and the bolt right end area 22 of the inclined bolt 2 can be relatively and slidably abutted together, so that when the bolt left end area 21 is subjected to an extrusion force in the vertical direction, the inclined bolt 2 can swing vertically.

In order to enable the inclined locking tongue 2 to swing smoothly, as shown in fig. 2 to 5, when viewed in a transverse direction, the inclined locking tongue 2 is in a diamond shape, a tongue left end region 21 of the inclined locking tongue 2 has two inclined surfaces which are acute angles, namely a first front inclined slope surface 23 and a second front inclined slope surface 24, and a tongue right end region 22 of the inclined locking tongue 2 has two inclined surfaces which are acute angles, namely a first rear inclined slope surface 25 and a second rear inclined slope surface 26; because the inclined lock tongue 2 can swing up and down, four slope surfaces of the inclined lock tongue 2 can present that part of the slope surfaces are in a horizontal state and other slope surfaces are in an inclined state due to the fact that the inclined lock tongue 2 swings to different states, for example, when the tongue left end area 21 of the inclined lock tongue 2 keeps an extending posture, the first front inclined slope surface 23 and the upper box wall body 41 are in a basically horizontal state, and the second front inclined slope surface 24 is in an inclined arrangement. The first front oblique slope surface 23 is parallel to the second back oblique slope surface 26, the second front oblique slope surface 24 is parallel to the first back oblique slope surface 25, the first front oblique slope surface 23 is in smooth transition connection with the first back oblique slope surface 25, an upper sliding matching surface 27 is formed at the transition connection position between the first front oblique slope surface 23 and the first back oblique slope surface 25, the second front oblique slope surface 24 is in smooth transition connection with the second back oblique slope surface 26, and a lower sliding matching surface 28 is formed at the transition connection position between the second front oblique slope surface 24 and the second back oblique slope surface 26. It is understood that when the inclined bolt 2 swings between the upper box wall 41 and the lower box wall 42, the contact points of the upper sliding fit surface 27 and the lower sliding fit surface 28 with the upper box wall 41 and the lower box wall 42 form the fulcrum of the swing of the inclined bolt 2 in the front direction or the rear direction, and the smooth curved surface and the flat surface have small resistance and smooth sliding when moving relatively.

On the other hand, when the left end region 21 of the latch tongue 2 is in a state of extending leftward, the front boss 221 and the rear boss 222 on the front and rear sides of the right end region 22 are pressed against the left side wall 43, and in order to enable the latch tongue 2 to smoothly swing, as shown in fig. 5, the front boss 221 and the rear boss 222 are provided with a left rounded transition surface 223 and a right rounded transition surface 224 at end corners close to the first front sloping surface 23, so that when the latch tongue 2 swings up and down, the left rounded transition surface 223 and the right rounded transition surface 224 can be slidably connected to the left side wall 43 and serve as a swing fulcrum of the latch tongue 2, which can also reduce the jamming of the door during swinging and improve the smoothness of opening and closing of the latch tongue 11.

After at least most of the inclined lock tongue 2 is retracted into the tongue box cavity 40, the inclined lock tongue 2 can be reset leftward due to the pushing of the pushing block 5, and the right end of the tongue right end region 22 and the left end of the pushing block can be slidably abutted together, which enables the inclined lock tongue 2 to swing relative to the pushing block 5, but in order to enable the pushing block 5 to swing and reset the inclined lock tongue 2 in the process of pushing leftward, a further technical solution may also be that the tongue right end region 22 is provided with a first abutting plane 225 and a second abutting plane 226 which can be combined with the pushing block 5 and arranged at an obtuse angle, and a transitional joining portion between the first abutting plane 225 and the second abutting plane 226 forms an abutting transition surface 227, wherein the first abutting plane 225 is perpendicular to the first front inclined surface 23, and the second abutting plane 226 is perpendicular to the second front inclined surface 24. The left end face 52 of the pushing block 5 is a vertically arranged plane in the up-down direction, in order to enable the pushing block 5 to better push the inclined lock tongue 2, the up-down extension height of the left end face 52 of the pushing block is substantially equal to the distance between the first front inclined slope surface 23 and the second rear inclined slope surface 26, and the left end face 52 of the pushing block 5 is arranged in the middle area of the inclined lock tongue 2 (i.e., between the upper box wall body 41 and the lower box wall body 42). As shown in fig. 3, when the first abutting plane 225 is combined with the pushing block left end surface 52, the contact surfaces of the pushing block left end surface 52 and the first abutting plane 225 are simultaneously distributed in the upper and lower side areas of the pushing block left end surface 52; as shown in fig. 4, when the second abutting plane 226 is combined with the pushing block left end surface 52, the contact surface of the pushing block left end surface 52 and the second abutting plane 226 is distributed on the lower side area of the pushing block left end surface 52. The advantage that sets up like this is, when the ejector pad 5 pushes away left oblique spring bolt 2, if oblique spring bolt 2 is in the gesture of downward wobbling, the ejector pad 5 pushes away in second top is leaned on the plane 226, and this lets oblique spring bolt 2 receive the moment of upwards moving and can swing upwards reset when moving left, and after the pendulum resets on oblique spring bolt 2, the ejector pad 5 pushes away on the first top of oblique spring bolt 2 is leaned on the plane 225 and let oblique spring bolt 2 can slide steadily.

In order to reduce noise generated when the inclined bolt 2 collides with the bolt box body 4 when the inclined bolt 2 is reset, the impact force between the inclined bolt 2 and the bolt box body 4 can be reduced by reducing the moving speed of the inclined bolt 2, and for this reason, a gear 61 is further provided on the push block 5, a rack 62 is provided on the bolt box body 4, when the inclined bolt 2 or the push block spring 51 pushes the push block 5 to move left and right, the push block 5 also moves left and right with the gear 61, and the gear 61 is simultaneously in meshing transmission with the rack 62. The gear 61 is a damper gear, rotational resistance of the gear is usually generated by a resistance spring or damper oil provided on a gear shaft, the gear 61 is driven by the push block 5 to move left and right and is engaged with the rack 62 to rotate, and the moving speed of the gear 61 can be reduced by reducing the rotational speed of the gear 61. The gear 61 is arranged on the push block 5, and one of the two meanings is that the gear 61 is limited on the push block 5 so as to reduce looseness or collision of the gear 61 and the push block 5 during movement, as shown in fig. 2, a pit is arranged on the upper side surface of the push block 5, the gear 61 is installed in the pit, and the gear 61 is not in contact with the inclined bolt 2 and the push block spring 51, so that the problem that the gear 61 is in contact with the inclined bolt 2 to generate noise is effectively solved, the problem that the gear 61 is damaged due to extrusion is also reduced, and the service stability and the service life of the gear are greatly improved.

In order to lock the door leaf 11 after closing and to open it only by means of a door handle, a further technical solution may be that, as shown in fig. 5, the lock body further includes a lock housing 14, an opening portion is provided at one side of the lock housing 14, the tongue box body 4 is arranged in the lock housing 14 and the tongue hole 430 faces the opening portion so that the tongue left end region 21 of the oblique locking tongue 2 can extend out of the tongue hole 430 and the opening portion. The bolt mechanism further comprises a brake arranged on the outer side of the bolt box body 4, the brake is used for combining the inclined bolt 2 to stop the inclined bolt 2 from swinging, and after the inclined bolt 2 is stopped from swinging, when the door leaf 11 is pushed reversely, the door leaf 11 cannot be opened because the inclined bolt 2 is kept in an extending state. Fig. 6 to 8 show that the latch mechanism hides the upper wall of the lock housing 14 and the latch box 4, the brake includes a first brake 71 disposed at the rear side of the latch box, the first brake 71 is plate-shaped, a rear insertion hole (not shown) capable of avoiding the first brake 71 from passing through is disposed on the rear side wall 46 of the latch box 4 (as shown in fig. 2, hidden by the upper box wall 41), a rear insertion slot 2220 is disposed on the rear boss 222 of the oblique latch bolt 2, and when the first brake 71 is inserted into the latch box cavity 40 through the rear insertion hole, the first brake 71 can combine with the rear insertion slot 2220 on the oblique latch bolt 2 to stop the oblique latch bolt 2 from swinging. Further, since the insertion groove 2220 is a left-right insertion groove, the first stopper 71 restricts the tilt tongue 2 from being able to swing, but does not affect the slide of the tilt tongue 2 in the left-right direction, and thus the tilt tongue 2 can be retracted into the tongue box chamber 40 by sliding to the right when the door 11 is closed, as in a normal lock body, to close the door.

The door 11 is normally closed in two states, one is a windproof closing state, that is, the door 11 can be opened by rotating the handle after being closed, a handle fork 15 associated with the outer door handle 31 and the inner door handle 32 is further disposed in the lock housing 14, the first brake 71 is rotatably disposed in the lock housing 14, the brake further includes a first return spring 73, the first return spring 73 is disposed between the first brake 71 and the lock housing 14, and the first return spring 73 is used for driving the first brake 71 to be coupled to the oblique bolt 2. The first stopper 71 is a normally closed mechanism which is automatically kept coupled to the inclined lock tongue 2 to stop the inclined lock tongue 2 from swinging, the first stopper 71 is associated with the handle fork 15 and can be used for pulling the first stopper 71 away from the inclined lock tongue 2 through the handle fork 15 when the outer door handle 31 or the inner door handle 32 is rotated to release a normally closed state, and the door leaf 11 can be pushed and opened after the inclined lock tongue 2 releases the normally closed state.

The other closed state of the door 11 is a locked closed state, that is, the door can be opened only by matching a key with a rotating handle, and further, according to the technical solution, a second brake 72 disposed at the front side of the lock housing 14 is further disposed in the lock housing 14, a front insertion hole 450 through which the second brake 72 can pass is disposed on the front side wall body 45, a front insertion groove 2210 is disposed on the front boss 221 of the oblique bolt 2, and when the second brake 72 is inserted into the bolt box cavity 40 through the front insertion hole 450, the second brake 72 can be combined with the front insertion groove 2210 on the oblique bolt 2 to stop the oblique bolt 2 from swinging. The front slot 2210 is also through in the left-right direction, and only the swing of the inclined bolt 2 is limited but the left-right sliding is not affected. The lock housing 14 is further provided with a second return spring 74, the second return spring 74 is disposed between the second stopper 72 and the lock housing 14, and the second return spring 74 is used for driving the second stopper 72 to be coupled to the oblique bolt 2. The lock shell 14 is further provided with a lock cylinder shifting fork 16 which is associated with the lock cylinder 13, the second brake 72 is associated with the lock cylinder shifting fork 16, and the second brake 72 is a normally open mechanism and automatically keeps away from the inclined lock bolt 2 under the action of the lock cylinder shifting fork 16. Further, the lock core 13 is further provided with a shifting lever, when the lock core 13 is rotated, the shifting lever can shift the core shifting fork 16, and the second brake 72 is shifted by the core shifting fork 16 to be combined with the inclined bolt 2 so as to realize locking. This state is a locked closed state of the door 11, at this time, the door 11 cannot be opened by rotating the outer door handle 31 outside the door, a key is needed to rotate the lock cylinder 13 and make the lock cylinder fork 16 shift the second brake 72 to separate from the inclined lock tongue 2, and then the outer door handle 31 is rotated to make the first brake 71 also separate from the inclined lock tongue 2 to open the door 11. However, in general, when the door 11 is in the wind-proof closed state, the second brake 72 is a normally open mechanism that automatically keeps the inclined lock tongue 2 away so as to allow the door 11 to be opened and closed freely, and as shown in fig. 7, the second brake 72 is shifted away from the inclined lock tongue 2 by the cylinder fork 16.

Further, in order to facilitate that a person in a room can open the door by rotating the inner door handle 32 whether the door leaf 11 is in the wind-proof closed state or the locking closed state, the handle fork 15 includes a first clutch plate 151, a second clutch plate 152 and a third clutch plate 153 which are coaxially and rotatably arranged, wherein the second clutch plate 152 is associated with the first brake 71, the first clutch plate 151 is associated with the outer door handle 31 and the second clutch plate 152, and the third clutch plate 153 is associated with the inner door handle 32, the second clutch plate 152 and the container locking fork 16. When the outer door handle 31 is rotated, the outer door handle 31 can drive the first clutch plate 151 to rotate, the first clutch plate 151 pushes the second clutch plate 152 to rotate, and the second clutch plate 152 further drives the first brake 71 to leave the oblique bolt 2. When the inner door handle 32 rotates, the inner door handle 32 can drive the third clutch plate 153 to rotate, the third clutch plate 153 can drive the lock core shift fork 16 to rotate and drive the second clutch plate 152 to rotate, the lock core shift fork 16 shifts the second brake 72 to separate from the oblique lock tongue 2, the second clutch plate 152 drives the first brake 71 to separate from the oblique lock tongue 2, so that the first brake 71 and the second brake 72 can be separated from the oblique lock tongue 2 by rotating the inner door handle 32, and the locking state of the door leaf 11 is released to realize door opening.

Claims (9)

1. A lock tongue mechanism is used for locking a door leaf and comprises a tongue box body, an inclined lock tongue, a push block and a push block spring; the inclined lock tongue comprises an inclined lock tongue body, a push block and a push block spring, wherein the inclined lock tongue body is provided with a tongue box cavity and a tongue hole, the inclined lock tongue comprises a tongue left end region and a tongue right end region, the inclined lock tongue, the push block and the push block spring are sequentially arranged in the tongue box cavity, the push block spring pushes the push block to be kept leftward, the push block pushes the inclined lock tongue to be kept leftward and can push the tongue left end region of the inclined lock tongue to extend out of the tongue box body from the tongue hole, the push block and the tongue right end region of the inclined lock tongue are kept to be relatively slidably abutted together, and after the tongue left end region of the inclined lock tongue extends out of the tongue box body, the inclined lock tongue can be extruded and retracted into the tongue box cavity and can also swing relative to the tongue box body and the push block; the push block is characterized in that a rotatable gear is arranged on the push block, the gear is not in contact with an inclined lock tongue and a push block spring, a rack is arranged on the tongue box body, when the inclined lock tongue or the push block spring pushes the push block to move left and right, the push block also drives the gear to move left and right, and the gear is simultaneously in meshing transmission with the rack.

2. The latch bolt mechanism according to claim 1, wherein the inclined latch bolt is diamond-shaped when viewed in a transverse direction, and a left end region of the inclined latch bolt has two inclined surfaces at an acute angle, namely a first front inclined surface and a second front inclined surface, and a right end region of the inclined latch bolt has two inclined surfaces at an acute angle, namely a first rear inclined surface and a second rear inclined surface; the first front oblique slope surface is parallel to the second rear oblique slope surface, the second front oblique slope surface is parallel to the first rear oblique slope surface, the first front oblique slope surface is in smooth transition connection with the first rear oblique slope surface, an upper sliding matching surface is formed at the transition connection part between the first front oblique slope surface and the first rear oblique slope surface, the second front oblique slope surface is in smooth transition connection with the second rear oblique slope surface, and a lower sliding matching surface is formed at the transition connection part between the second front oblique slope surface and the second rear oblique slope surface; the upper sliding matching surface and the lower sliding matching surface are matched to form a fulcrum of the inclined lock tongue swinging along the front direction or the rear direction.

3. The latch mechanism according to claim 2, wherein the latch case includes an upper case wall, a lower case wall, and a left side wall located between the upper case wall and the lower case wall, the latch case cavity is disposed between the upper case wall, the lower case wall, and the left side wall, the latch hole is disposed on the left side wall, the inclined latch is disposed between the upper case wall and the lower case wall, and the inclined latch swings up and down and slides left and right with the upper case wall and the lower case wall as a support.

4. The latch bolt mechanism of claim 1, 2, or 3, further comprising a brake disposed outside the bolt housing for engaging the angled bolt to hold the angled bolt from swinging.

5. The latch bolt mechanism according to claim 4, wherein the brake is plate-shaped, the bolt box body is arranged with an insertion hole capable of avoiding the brake, the inclined bolt is provided with an insertion groove capable of receiving the brake, and when the brake is inserted into the bolt box cavity through the insertion hole, the inclined bolt can be combined with the insertion groove on the inclined bolt to stop the inclined bolt from swinging.

6. The deadbolt mechanism of claim 4, further comprising a lock housing having an opening formed in one side thereof, said tongue housing disposed within said lock housing and said tongue opening facing said opening such that a left tongue end region of said angled deadbolt extends beyond both said tongue opening and said opening; the lock shell is internally provided with a handle shifting fork related to a door handle and a lock cylinder shifting fork related to a lock cylinder, the brake is arranged in the lock shell and comprises a first brake and a second brake, the first brake and the second brake are respectively arranged on the front side and the rear side of the lock cylinder body, the first brake is a normally closed mechanism and automatically keeps combined with the inclined lock cylinder to stop the inclined lock cylinder from swinging, the first brake is related to the handle shifting fork and can shift the first brake to leave the inclined lock cylinder through the handle shifting fork when the door handle is rotated so as to relieve the normally closed state, the second brake is a normally open mechanism and automatically keeps leaving the inclined lock cylinder, and the second brake is related to the lock cylinder shifting fork and can shift the second brake to combine with the inclined lock cylinder through the lock cylinder shifting fork so as to realize locking.

7. The deadbolt mechanism of claim 6, wherein the brake further comprises a first return spring disposed between the first brake and a lock housing, the first return spring configured to actuate the first brake to couple to the angled deadbolt.

8. The deadbolt mechanism of claim 6, wherein the brake further comprises a second return spring disposed between the second brake and the lock housing, the second return spring for actuating the second brake to couple to the angled deadbolt; the lock cylinder shifting fork is rotatably arranged in the lock shell, a shifting rod is arranged on the lock cylinder, one end of the lock cylinder shifting fork is connected with the shifting rod of the lock cylinder, the other end of the lock cylinder shifting fork is connected with the second brake, and when the shifting rod shifts the lock cylinder shifting fork to rotate in the forward direction, the lock cylinder shifting fork can drive the second brake to overcome the acting force of the second return spring to leave the inclined lock tongue and enable the second brake to be kept in a normally open state; when the poking rod pokes the lock cylinder shifting fork to rotate reversely, the lock cylinder shifting fork can release the second brake and enable the second brake to be combined to the inclined lock tongue under the action force of the second return spring.

9. A lock body is characterized by comprising a lock shell, a lock tongue mechanism which is arranged in the lock shell and is disclosed in any one of claims 1 to 8, and a door handle and a lock liner which are movably arranged on the lock shell and are linked with the lock tongue mechanism, wherein the lock liner is used for locking or releasing the swing locking state of an inclined lock tongue, and the door handle can rotate so as to release the swing locking state of the inclined lock tongue.

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