CN113279631B - Delay trigger mechanism and lock body - Google Patents

Abstract

The invention provides a delay trigger mechanism and a lock body. The locking assembly includes a locking member and a second biasing member. The locking member has a passive trigger portion, a locking portion, and a holding portion. The delay triggering mechanism with the structure is applied to a door lock body, when the door frame is closed after unlocking, the delay locking is realized through the movement of the locking member between the locking position and the holding position, the first triggering end is ensured to be completely extended into the door frame hole and then locked, the main lock tongue is ensured to be extended into the lock tongue hole, and false locking is prevented; meanwhile, the door frame is prevented from being closed after the lock tongue pops up, noise during closing can be effectively reduced, and the door frame and the lock tongue are prevented from being damaged. The delay triggering mechanism can avoid the problem that the dead bolt component cannot be effectively locked at the locking position due to movement abrasion between the sliding pin and the hollow feeler lever, and can stably and reliably control the locking in and the locking out of the main dead bolt mechanism.

Description

Delay trigger mechanism and lock body

Technical Field

The invention relates to the technical field of locks, in particular to a delay trigger mechanism and a lock body.

Background

In the prior art, a self-spring lock body structure, such as CN2604490Y, discloses a locking control mechanism of an automatic door lock, and when a door of the automatic door lock equipped with the locking control mechanism enters a door frame, one end of a trolley with a roller protruding from a front panel of a lock shell contacts with the door frame and is pressed into the lock shell by the door frame. Simultaneously, the other end of the feeler lever presses the actuating end of the sliding pin of the unidirectional actuating mechanism arranged on the locking lever, so that the sliding pin can retract into a pin hole formed on the locking lever against the biasing force of the sliding pin spring. And then when the actuating hook formed on one end of the feeler lever in the lock shell passes over the sliding pin, the sliding pin is ejected out of the pin hole and is engaged with the actuating hook on the feeler lever under the action of the biasing force of the sliding pin spring. When the end of the feeler lever with the roller contacts the bolt hole on the door frame, the feeler lever is ejected from the lock shell under the biasing force of the feeler lever spring. At the same time, the actuating hook on the feeler lever drives the sliding pin and causes the locking lever to pivot about its pivot against the biasing force of the locking lever spring, causing the locking abutment on the locking lever to disengage from engagement with the latch member. The spring bolt component which loses the locking effect of the locking rod moves towards the spring bolt ejecting direction under the biasing force of the locking spring, and the spring bolt is clamped into the spring bolt hole on the door frame, so that the door closing action is completed.

The lock body structure is characterized in that the trigger assembly is too sensitive, the lock tongue is ejected to lock at the moment that the trigger assembly contacts the door frame, at the moment, the trigger assembly is not completely pressed to the bottom or stretches into the trigger assembly hole, the lock tongue is ejected to lock when not completely aiming at the lock tongue hole, the false lock is caused, the door is continuously closed after the lock tongue is ejected, the door is collided to scrape the door frame, the door frame and the lock tongue are damaged, and meanwhile, larger noise is generated.

To solve the above problems, chinese patent document CN2849050Y discloses a lock-out control mechanism of an automatic door lock. The locking trigger assembly comprises a hollow feeler lever slidably mounted on a dead bolt member, a release biasing member applying a biasing force causing a trigger end of the hollow feeler lever to protrude from a front panel of a lock housing, and a positioning biasing member applying a biasing force to a sliding pin provided in the hollow feeler lever facing away from the trigger end; the locking assembly is movably disposed on the latch member and includes a locking member having a locking tab and a limit stop, a locking biasing member exerting a biasing force on the locking member tending to urge the limit stop against a member secured to the housing, the locking tab being coupled to the securing member of the housing in a non-self locking relationship.

When the latch bolt member is in the latched condition, the locking member is in contact with the slide pin, and such a force on the slide pin has a component force that causes the slide pin to contact the hollow feeler lever. The above prior art requires that the sum of the friction force generated by the contact of the slide pin with the hollow feeler lever and the biasing force of the positioning biasing member acting on the slide pin is greater than the component force of the locking member acting on the slide pin so that the slide pin tends to retract into the hollow feeler lever, thereby maintaining the locking member in its locking position against the member fixed on the housing by maintaining the lengths of the slide pin and the hollow feeler lever unchanged.

However, during use, the telescoping movement between the slide pin and the hollow feeler bar necessarily causes the contact portion therebetween to be sanded, which over time causes a reduction in the coefficient of friction of the contact portion, once the sum of the friction force and the biasing force of the positioning biasing member on the slide pin is less than the component force of the locking member on the slide pin tending to retract the slide pin into the hollow feeler bar, the tongue member will no longer be locked in the locked position.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that in the prior art, the locking part is required to act on the sliding pin to enable the sliding pin and the hollow feeler lever to generate a component force of friction force, so that the locking control mechanism has unstable work.

To this end, the invention provides a time delay trigger mechanism comprising

The stop piece is arranged in the shell and is fixed on the main bolt mechanism;

A trigger assembly having a trigger member reciprocally disposed within a housing between a locked position and an unlocked position, and a first biasing member disposed between said trigger member and said housing for biasing said trigger member toward said locked position; the first trigger end of the trigger piece stretches out of and retracts into the shell in the reciprocating movement, and the trigger piece is also provided with an active trigger part;

A lock assembly having a lock member reciprocally disposed within the housing between a lock position and a hold position, and a second biasing member disposed between the lock member and the housing to apply a biasing force to the lock member in the lock position; the locking component is provided with a passive trigger part which is matched with the active trigger part of the trigger piece to drive the locking component to move from the locking position to the holding position in the process of moving the trigger piece from the locking position to the locking position; the locking member further has a locking portion adapted to cooperate with the stopper in a locking position to prevent movement of the main latch mechanism in a lock-out direction;

The locking component is also provided with a retaining part which is matched with the stop piece in a retaining position and prevents the main lock tongue mechanism from moving towards the locking direction, one of the retaining part and the stop piece is provided with a contact point, a retaining point and a sliding edge which connects the contact point and the retaining point; at the contact point, the position where the locking member contacts the stopper is more biased toward the locking-out direction of the main-lock-tongue mechanism than the position where the stopper is disengaged from the locking portion, and at the holding position of the locking member, the stopper cooperates with the holding point to hold the main-lock-tongue mechanism in the locking-in position.

Optionally, in the delay trigger mechanism, the contact point, the holding point and the sliding edge connecting the contact point and the holding point are both disposed on the holding portion.

Optionally, in the delay triggering mechanism, the locking part is a part capable of moving relative to the holding part, and the locking part is connected with the holding part through a first linkage mechanism; the first linkage mechanism keeps the locking part and the holding part to move synchronously when the passive triggering part is driven by the active triggering part; when the main latch mechanism moves towards the locking direction, the first linkage mechanism is suitable for enabling the locking part to move relative to the retaining part under the pushing of the retaining part so as to open the moving path of the retaining part, and after the main latch mechanism reaches the locking position, the locking part is reset to move under the action of a biasing force and is matched with the retaining part so as to prevent the main latch mechanism from moving towards the locking direction.

Optionally, in the delay trigger mechanism, the first linkage mechanism includes a stopper fixed on one of the locking portion and the holding portion, and a reset bias member that resets the locking portion after moving; the stop block is suitable for keeping the locking part and the holding part to move synchronously when the passive triggering part is driven by the active triggering part, and does not influence the independent movement of the locking part relative to the holding part when the main lock tongue mechanism moves towards the locking direction.

Optionally, in the delay trigger mechanism, the stopper is disposed on the holding portion, and the second biasing member also functions as the reset biasing member.

Optionally, in the delay trigger mechanism, the stop member is a stop pin fixed on the main lock tongue mechanism; the retaining part is a retaining hook formed on the locking member, and the locking part is a locking hook formed on the locking member; the hook-shaped ends of the holding hook and the locking hook are opposite, and the stop pin is suitable for passing between the two hook-shaped ends.

Optionally, in the delay trigger mechanism, the stop pin includes a holding pin that is respectively fixed on the main latch mechanism and is matched with the holding hook, and a locking pin that is matched with the locking hook.

Optionally, in the above delay trigger mechanism, the locking pin is biased to a position of the main latch mechanism in a locking direction with respect to the holding pin.

Optionally, in the delay triggering mechanism, the locking member is rotatably disposed in the housing through a first fixed shaft disposed on the housing, so as to form a lever using the first fixed shaft as a fulcrum;

Wherein the passive trigger part is positioned on one side of a power arm of the lever relative to the trigger acting force of the active trigger part of the trigger assembly;

the retaining portion and the locking portion are located on a side of the resistance arm of the lever with respect to a trigger force of the active trigger portion of the trigger assembly.

Optionally, in the delay trigger mechanism, the locking portion and the holding portion are coaxially rotatably mounted on the first fixing shaft, and an axis of the first fixing shaft is disposed near an extension line of the locking-out locking-in direction of the stopper acted by the locking portion.

Optionally, the delay trigger mechanism further comprises

The trigger seat assembly can be arranged in the shell in a switching manner between a trigger state of establishing transmission between the active trigger part and the passive trigger part and an avoidance state of disconnecting the transmission between the active trigger part and the passive trigger part;

The avoidance driving assembly is arranged in the shell, and converts the trigger seat assembly into an avoidance state after the main lock tongue member reaches a locking position; and when the trigger piece reaches the locking position, the avoidance driving assembly converts the trigger seat assembly into a trigger state.

Optionally, the delay trigger mechanism, the avoidance driving assembly includes a third biasing member for applying a force to the trigger assembly to maintain the triggered state; and the driving assembly is driven by unlocking acting force to convert the trigger seat assembly into an avoidance state.

Optionally, in the delay trigger mechanism, the trigger seat assembly has a trigger seat installed in the casing in a first moving manner and a trigger transmission member installed on the trigger seat in a second moving manner; one of the first moving mode and the second moving mode guides the trigger transmission member to participate in the transmission between the active trigger part and the passive trigger part in the trigger state, and the other moving mode guides the trigger transmission member to move between a trigger position forming the trigger state and an avoidance position forming the avoidance state against the biasing force of the third biasing member under the action of the driving assembly.

Optionally, in the delay trigger mechanism, the trigger seat is slidably and translationally mounted in the housing, the trigger transmission member is slidably and translationally mounted on the trigger seat, and the translational and sliding of the trigger seat drives the trigger transmission member to switch between a trigger position and an avoidance position; the third biasing member is disposed between the trigger seat and the housing.

Optionally, in the delay trigger mechanism, the trigger seat has a seat bottom plate slidably arranged in cooperation with the housing, and a first pin slot guiding mechanism extending along a moving direction of the trigger position and the avoiding position is arranged between the seat bottom plate and a corresponding position of the housing;

the trigger seat is also provided with a seat top plate matched with the trigger transmission piece in a sliding manner, and a second pin groove guide mechanism extending along the moving direction of the active trigger part is arranged between the seat top plate and the trigger transmission piece.

Optionally, the delay trigger mechanism is characterized in that the driving assembly is provided with a main driving piece connected with the handle shaft and/or the lock head through a one-way clutch mechanism and/or a gear transmission mechanism, and the acting end of the main driving piece is suitable for driving the trigger seat assembly to act.

Optionally, in the delay trigger mechanism, the driving assembly further includes an auxiliary driving member disposed between the active end of the main driving member and the trigger seat; the auxiliary driving piece is rotatably arranged on the shell, is deflected under the action of the action end of the main driving piece, and drives the trigger seat to move through the contact end of the auxiliary driving piece and the trigger seat.

Optionally, in the delay triggering mechanism, a first protruding portion is disposed at one end of the main driving member facing the auxiliary driving member, and a first recess portion matched with the first protruding portion is disposed at one side of the auxiliary driving member facing the main driving member; and in the avoidance state, the first protruding part slides to one side of the first recessed part, which is close to the trigger seat, so as to drive the other end of the auxiliary driving part to deviate from the passive trigger part for movement.

Optionally, in the delay triggering mechanism, a section of an end of the triggering seat, which is close to the auxiliary driving member, is in a U shape, and a first accommodating cavity into which the contact end of the auxiliary driving member extends is formed.

Optionally, in the delay trigger mechanism, a second linkage mechanism is disposed between the main driving member and the first biasing member, and the first biasing member applies a reset biasing force to the main driving member through the second linkage mechanism.

The invention provides a lock body, which comprises the delay trigger mechanism.

The technical scheme of the invention has the following advantages:

1. The delay triggering mechanism provided by the invention is applied to a door lock body, when the door lock body is unlocked, the main lock tongue mechanism drives the stop piece to move towards the locking position to the locking part under the action of driving force, the second biasing piece applies biasing force towards the locking position to the locking part, the locking part is matched with the stop piece to lock the locking part, the stop piece is prevented from moving towards the locking direction, and the locking member is at the locking position. When the fan body is opened, the stop piece is kept at the locking position, and the first trigger end of the trigger piece extends out of the shell; then the fan body is closed, the first trigger end is extruded by the door frame and retracted into the shell, the active trigger part moves towards the passive trigger part to drive the passive trigger part to move, and the passive trigger part drives the locking member to move from the locking position to the holding position against the biasing force of the second biasing member. In the holding position, the holding point cooperates with the stopper to fix the stopper, preventing the main latch mechanism from moving in the latch-out direction.

When the first trigger end stretches into the door frame hole, the trigger piece moves to the locking position to reset under the action of the first biasing piece, the first trigger end stretches out of the shell, the active trigger part resets to be separated from the passive trigger part, and the locking component moves to the locking position under the action of the biasing force of the second biasing piece. In the moving process of the locking member, the retaining point is separated from the stop piece firstly, the stop piece slides to the contact point along the sliding edge, the retaining part cannot lock the stop piece at the contact point, and meanwhile, the contact position of the locking member and the stop piece is deviated to the locking out direction of the main lock tongue mechanism relative to the position of the stop piece separated from the locking part, namely, the position of the stop piece is separated from the range capable of being matched with the locking part, the stop piece cannot be locked after the locking part is reset, and the main lock tongue mechanism continues to move to the locking out direction to realize locking out.

The delay locking is realized through the movement of the locking member between the locking position and the holding position, so that the first trigger end is ensured to fully extend into the door frame hole and then locked, the main lock tongue is ensured to extend into the lock tongue hole, and false locking is prevented; meanwhile, the door frame is prevented from being closed after the lock tongue pops up, noise during closing can be effectively reduced, and the door frame and the lock tongue are prevented from being damaged. The delay triggering mechanism can avoid the problem that the dead bolt component cannot be effectively locked at the locking position due to movement abrasion between the sliding pin and the hollow feeler lever, and can stably and reliably control the locking in and the locking out of the main dead bolt mechanism.

2. The delay trigger mechanism provided by the invention is provided with the avoidance driving component, when the fan body is opened after unlocking, the handle is screwed clockwise, the main driving component rotates clockwise, the acting end of the main driving component drives the auxiliary driving component to rotate anticlockwise, the trigger seat and the trigger transmission component are pushed outwards, and the trigger transmission component moves to the avoidance state. When the fan body is opened, the trigger transmission piece can not trigger the passive trigger part, the locking part is still kept at the locking position, the main lock tongue mechanism is prevented from being locked out in the fan body opening state, and the main lock tongue mechanism is not required to be driven to move towards the locking direction again by a key or a handle when the fan body is closed again, so that the fan body is convenient to open and close.

3. The lock body provided by the invention can prevent false lock; meanwhile, the noise generated when the door is closed can be effectively reduced, and the door frame and the lock tongue are prevented from being damaged; and simultaneously, the locking in and the locking out of the main bolt mechanism can be controlled stably and reliably.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a delayed trigger mechanism latch and a master latch locked into position according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a main bolt locking and oblique bolt extending state of a delay trigger mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the main tongue lock and the out-of-lock state of the oblique tongue of the delay trigger mechanism according to the embodiment of the present invention;

FIG. 4 is a cross-sectional view of a delay trigger mechanism provided by an embodiment of the present invention;

FIG. 5 is a schematic illustration of the engagement of the primary latch mechanism with the bypass drive assembly;

FIG. 6 is a schematic view of the engagement of the locking member with the first linkage mechanism;

FIG. 7 is a schematic diagram illustrating the cooperation of the trigger piece and the trigger seat;

FIG. 8 is a schematic view of a primary latch mechanism;

Fig. 9 is a cross-sectional view of the time delay trigger mechanism.

Reference numerals illustrate:

11-a stopper; 111-a retaining pin; 112-locking pin; 12-a tongue-locking plate; 121-a first tank; 122-fifth guide holes; 13-main bolt; 2-a housing; 311-oblique tongue; 312-a tongue bar; 313-a first fixing plate; 32-a first biasing member; 331-trigger seat; 332-triggering the transmission member; 333-a first pin slot guide mechanism; 334-a second pin slot guide mechanism; 341-a third biasing member; 3421—a main drive; 34211-second protrusions; 3422—an auxiliary drive; 411-locking part; 412-a holding portion; 42-a second biasing member; 43-stop; 44-a first fixed shaft; 5-handle shaft; 61-a first drive plate; 71-a second fixed shaft; 72-a first gear; 721-first protrusions; 73-a second gear; 74-a third gear; 75-hanging pin.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

The present embodiment provides a time delay trigger mechanism, as shown in fig. 1 to 5 and 9, which includes a stopper 11, a trigger assembly, and a lock assembly.

Wherein, the stop piece 11 is arranged in the shell 2 and fixed on the main bolt mechanism; the trigger assembly has a trigger member reciprocally disposed within the housing 2 between a locked position and an unlocked position, and a first biasing member 32 disposed between the trigger member and the housing 2 for applying a biasing force to the trigger member toward the locked position; the first trigger end of the trigger piece extends out of and retracts into the housing 2 during the reciprocating movement, and the trigger piece is also provided with an active trigger part.

The locking assembly includes a locking member and a second biasing member 42. Wherein a locking member is reciprocally disposed within said housing 2 between a locking position and a retaining position, and a second biasing member 42 is disposed between said locking member and said housing 2 exerting a biasing force of the locking position on said locking member.

The locking member has a passive trigger portion, a locking portion 411, and a holding portion 412. Wherein, in the course that the trigger piece moves from locking out position to locking in position, the passive trigger part cooperates with initiative trigger part of the trigger piece to drive the locking component to move from locking position to holding position; the locking portion 411 is adapted to cooperate with the stopper 11 in the locked position to prevent movement of the main bolt mechanism in the locking direction.

In the holding position, the holding part 412 cooperates with the stopper 11 to prevent the main bolt mechanism from moving in the locking direction, one of the holding part 412 and the stopper 11 is provided with a contact point, a holding point and a sliding edge connecting the contact point and the holding point; at the contact point, the position where the lock member contacts the stopper 11 is more biased toward the lock-out direction of the main latch mechanism than the position where the stopper 11 is disengaged from the lock portion 411, and at the holding position of the lock member, the stopper 11 cooperates with the holding point to hold the main latch mechanism at the lock-in position.

When the delay trigger mechanism with the structure is applied to a door lock body, during unlocking, the main lock tongue mechanism drives the stop piece 11 to move to the locking part 411 towards the locking position under the action of driving force, the second biasing piece 42 applies biasing force towards the locking position to the locking part 411, the locking part 411 and the stop piece 11 are matched to lock the locking part 411, the stop piece 11 is prevented from moving towards the locking direction, and at the moment, the locking member is at the locking position. When the fan body is opened, the stop piece 11 is kept at the locking position, and the first triggering end of the triggering piece extends out of the shell 2; then the fan body is closed, the first triggering end is extruded by the door frame and retracted into the shell 2, the active triggering part moves towards the passive triggering part to drive the passive triggering part to move, and the passive triggering part drives the locking member to move from the locking position to the holding position against the biasing force of the second biasing member 42. In the holding position, the holding point cooperates with the stopper 11 to fix the stopper 11, preventing the main lock tongue mechanism from moving in the lock-out direction.

When the first trigger end extends into the door frame hole, the trigger piece moves to reset towards the locking position under the action of the first biasing piece 32, the first trigger end extends out of the shell 2, the active trigger part resets to be separated from the passive trigger part, and the locking member moves towards the locking position under the action of the biasing force of the second biasing piece 42. In the moving process of the locking member, the retaining point is separated from the stopper 11, the stopper 11 slides along the sliding edge to a contact point, at the contact point, the retaining part 412 cannot lock the stopper 11, and at the same time, the contact position of the locking member and the stopper 11 is more biased to the locking direction of the main latch mechanism relative to the position of the stopper 11 separated from the locking part 411, that is, the position of the stopper 11 is separated from the range capable of being matched and locked with the locking part 411, the stopper 11 cannot be locked after the locking part 411 is reset, and the main latch mechanism continues to move to the locking direction to realize locking.

The delayed locking is realized through the movement of the locking member between the locking position and the holding position, so that the first trigger end is ensured to fully extend into the door frame hole and then locked, the main lock tongue 13 is ensured to extend into the lock tongue hole, and false locking is prevented; meanwhile, the door frame is prevented from being closed after the lock tongue pops up, noise during closing can be effectively reduced, and the door frame and the lock tongue are prevented from being damaged. The delay triggering mechanism can avoid the problem that the dead bolt component cannot be effectively locked at the locking position due to movement abrasion between the sliding pin and the hollow feeler lever, and can stably and reliably control the locking in and the locking out of the main dead bolt mechanism.

Preferably, the contact point, the holding point, and the sliding edge connecting the contact point and the holding point are all provided on the holding portion 412.

The locking part 411 is a member movable relative to the holding part 412, and the locking part 411 and the holding part 412 are connected by a first linkage mechanism; the first linkage mechanism keeps the locking part 411 and the holding part 412 moving synchronously when the passive trigger part is driven by the active trigger part; when the main latch mechanism moves in the locking direction, the first linkage mechanism is adapted to move the locking portion 411 relative to the holding portion 412 under the pushing of the stopper 11 to open the moving path of the stopper 11, and after the main latch mechanism reaches its locking position, the locking portion 411 is reset to move under the action of a biasing force and cooperates with the stopper 11 to prevent the main latch mechanism from moving in the locking direction.

For example, the first linkage includes a stopper 43 and a return biasing member. Referring to fig. 6, the stopper 43 is fixed to the holding portion 412, and the return biasing member is used for return after the movement of the locking portion 411, and the second biasing member 42 simultaneously functions as a return biasing member. The stopper 43 is adapted to hold the locking portion 411 and the holding portion 412 in synchronization when the passive trigger portion is driven by the active trigger portion, and to prevent the locking portion 411 from moving alone with respect to the holding portion 412 when the main latch mechanism moves in the latch direction.

Referring to fig. 1 to 3, the stopper 11 is a stopper pin fixed to the main latch mechanism; the holding part 412 is a holding hook formed on the locking member, and the locking part 411 is a locking hook formed on the locking member; the hook-shaped ends of the holding hook and the locking hook are opposite, and the stop pin is suitable for passing between the two hook-shaped ends.

The casing 2 is provided with a first fixed shaft 44, the locking member is rotatably arranged on the first fixed shaft 44 and arranged in the casing 2, and the locking member forms a lever taking the first fixed shaft 44 as a fulcrum; wherein the passive trigger part is positioned on one side of a power arm of the lever relative to the trigger acting force of the active trigger part of the trigger assembly; the holding portion 412 and the locking portion 411 are located on the resistance arm side of the lever with respect to the trigger force of the active trigger portion of the trigger assembly.

The locking part 411 and the holding part 412 are coaxially and rotatably mounted on the first fixed shaft 44, the holding hook and the locking hook are positioned on one side of the lever resistance arm, the holding part 412 extends on one side of the lever power arm to form a first extending part, and the end part of the first extending part is used as a passive triggering part. The locking portion 411 extends on the lever power arm side to form a second extension portion. The second extension portion is located below the first extension portion, and the stopper 43 of the first linkage mechanism is disposed on the first extension portion and extends downward to the side surface of the second extension portion. When the passive trigger part on the first extension part receives trigger force, the first extension part moves towards the second extension part, and the stop block 43 abuts against the side surface of the second extension part to push the locking hook to move away from the retaining hook.

The axis of the first fixed shaft 44 is close to the extending line of the locking direction of the locking member 11 acted by the locking portion 411, and the locking portion 411 rotates around the first fixed shaft 44 by a small angle to hook or separate from the locking member 11, thereby locking or unlocking.

Alternatively, the retaining pin includes a retaining pin 111 and a locking pin 112 respectively fixed to the main tongue mechanism, the retaining pin 111 being engaged with the retaining hook, and the locking pin 112 being engaged with the locking hook. The locking pin 112 is biased to the position of the locking direction of the main bolt mechanism relative to the retaining pin 111, so that when the main bolt mechanism is locked, the locking pin 112 firstly contacts with the locking hook and pushes the locking hook to rotate back to the stop piece 11 against the biasing force of the second biasing member 42, and after the locking hook passes over the stop piece 11, the locking hook automatically resets under the biasing force of the second biasing member 42 and hooks the stop pin, thereby realizing locking. In the unlocking process, only the locking hook is pushed to move, the holding hook is still, and the unlocking is labor-saving. The two stop pins are arranged simultaneously, so that the hook-shaped parts of the holding hook and the locking hook are mutually close to each other without interference, and the locking member has a compact structure.

The retaining pin 111 is provided with a ball bearing which facilitates sliding from the retaining point along the sliding edge to the contact point, reducing friction between the retaining pin 111 and the retaining hook sliding edge.

For example, the second biasing member 42 is a torsion spring, which is sleeved on the first fixing shaft 44, one leg of the second biasing member 42 acts on the first extension portion of the holding portion 412, and the other leg abuts on the housing 2.

Referring to fig. 7, for example, the triggering member is a latch 311 mechanism, which includes a latch 311 and a latch lever 312, the latch 311 is connected to the latch lever 312, a first fixing plate 313 is fixed on the housing 2, a middle portion of the latch lever 312 is slidably disposed on the first fixing plate 313 in a penetrating manner, the first biasing member 32 is a spring, and the first biasing member 32 is sleeved on the latch lever 312 between the first fixing plate 313 and the latch 311. The inclined tongue 311 is pressed by the compressed spring, and the inclined tongue rod 312 is retracted to drive the trigger transmission piece 332.

Referring to the figures, the trigger assembly further includes a trigger seat 331 assembly and a back-out drive assembly. The trigger seat 331 is configured in the housing 2 in a manner of being capable of switching between a trigger state of establishing transmission between the active trigger part and the passive trigger part and an avoidance state of disconnecting transmission between the active trigger part and the passive trigger part; the avoidance driving component is arranged in the shell 2, and after the main lock tongue 13 component reaches the locking position, the trigger seat 331 component is converted into an avoidance state; and when the trigger piece reaches the locking position, the avoidance driving component converts the trigger seat 331 component into a trigger state.

The bypass drive assembly includes a third biasing member 341 and a drive assembly, the third biasing member 341 applying a biasing force to the trigger assembly tending to maintain a triggered state; the driving assembly is driven by unlocking acting force to drive the trigger seat assembly to be converted into an avoidance state.

The trigger block 331 assembly includes a trigger block 331, a trigger transmission 332, a first pin slot guide mechanism 333, and a second pin slot guide mechanism 334. Wherein, the trigger seat 331 is mounted in the housing 2 in a first moving manner, and the trigger transmission member 332 is mounted on the trigger seat 331 in a second moving manner. One of the first moving mode and the second moving mode guides the trigger transmission member 332 to participate in the transmission between the active trigger portion and the passive trigger portion in the trigger state, and the other moving mode guides the trigger transmission member 332 to move between a trigger position constituting the trigger state and an avoidance position constituting the avoidance state against the biasing force of the third biasing member 341 by the force of the driving assembly.

For example, the trigger seat 331 is mounted in the housing 2 in a sliding manner, the trigger transmission member 332 is mounted on the trigger seat 331 in a sliding manner, and the sliding manner of the trigger seat 331 drives the trigger transmission member 332 to switch between the trigger position and the avoiding position; the third biasing member 341 is disposed between the trigger seat 331 and the housing 2.

The trigger seat 331 has a seat bottom plate and a seat top plate, the seat bottom plate is slidably disposed in cooperation with the housing 2, the first pin slot guide mechanism 333 is disposed between the seat bottom plate and the corresponding position of the housing 2, and the first pin slot guide mechanism 333 extends along the movement direction of the trigger position and the avoidance position. The seat top plate is slidably arranged in cooperation with the trigger transmission member 332, the second pin slot guiding mechanism 334 is arranged between the seat top plate and the trigger transmission member 332, and the second pin slot guiding mechanism 334 extends along the moving direction of the active trigger portion.

Optimally, the second pin slot guide 334 is perpendicular to the first pin slot guide 333. The first pin slot guiding mechanism 333 includes two parallel first guiding holes disposed on the base plate, and each first guiding hole is internally provided with a first guiding shaft, optionally, the third biasing member 341 is a torsion spring, the third biasing member 341 is sleeved on one of the first guiding shafts, and two feet of the third biasing member 341 are respectively disposed and connected with the base plate. The second pin slot guide mechanism 334 guides the trigger seat 331 to slide in translation on the housing 2.

The trigger transmission member 332 is disposed on the seat top plate, and the second pin slot guiding mechanism 334 includes a second guiding hole, a third guiding shaft, and a fourth guiding shaft, wherein the second guiding hole, the third guiding shaft are disposed on the seat top plate and the trigger transmission member 332, the third guiding shaft is fixed on the seat top plate and penetrates through the second guiding hole, the fourth guiding shaft is fixed on the trigger transmission member 332 and penetrates through the third guiding hole, and the trigger transmission member 332 moves in a translational manner along the second pin slot guiding mechanism 334.

The drive assembly includes a primary drive member 3421 and a secondary drive member 3422. Wherein the main driving member 3421 is connected to the handle shaft 5 through a one-way clutch mechanism. One end of the main driving member 3421 is sleeved on the handle shaft 5, and the other end extends towards the inclined tongue rod 312. The other end of the main driving member 3421, which is far from the handle shaft 5, is used as an acting end thereof, and the acting end thereof is suitable for driving the trigger seat 331 to act.

The auxiliary driving member 3422 is disposed between the active end of the main driving member 3421 and the trigger seat 331. The auxiliary driving member 3422 is rotatably disposed on the housing 2 at an end close to the acting end, the contact end of the auxiliary driving member 3422 away from the acting end extends toward the trigger seat 331, and the auxiliary driving member 3422 is deflected by the acting end of the main driving member 3421 and drives the trigger seat 331 to move through the contact end with the trigger seat 331.

Preferably, the trigger seat 331 has a U-shaped cross section near the end of the auxiliary driving member, and a first accommodating cavity into which the contact end of the auxiliary driving member extends is formed. A first protruding part is arranged at one end of the main driving part 3421 facing the auxiliary driving part, and a first concave part matched with the first protruding part is arranged at one side of the auxiliary driving part facing the main driving part 3421; and in the avoidance state, the first protruding part slides to one side, close to the trigger seat 331, of the first recessed part so as to drive the contact end of the auxiliary driving part to deviate from the passive trigger part. The contact end of the auxiliary driving piece pushes the trigger seat 331 outwards, and the trigger seat 331 drives the auxiliary driving piece to deviate from the passive trigger end to move to the avoiding position.

When the fan body is opened after unlocking, the handle is screwed clockwise, the main driving piece 3421 rotates clockwise, the acting end of the main driving piece 3421 drives the auxiliary driving piece to rotate anticlockwise, the trigger seat 331 and the trigger transmission piece 332 are pushed outwards, and the trigger transmission piece 332 moves to an avoidance state. In the state of opening the fan body, the trigger transmission piece 332 does not trigger the passive trigger part, the locking part 411 is still kept at the locking position, the main lock tongue mechanism is prevented from being locked out in the state of opening the fan body, and the main lock tongue mechanism is not required to be driven to move in the locking direction again by a key or a screwing handle when the fan body is closed again, so that the fan body is convenient to open and close.

A second linkage is provided between the main driving member 3421 and the first biasing member 32, and the first biasing member 32 applies a return biasing force to the main driving member 3421 through the second linkage. For example, the second linkage mechanism includes a first driving plate 61 and a fourth guiding hole, the fourth guiding hole is formed on a top plate and a bottom plate of the housing 2 on one side of the first fixing plate 313 near the trigger seat 331, the middle parts of the top and bottom of the first driving plate 61 are provided with outwardly protruding plugging parts, and the plugging parts are slidably plugged in the fourth guiding hole. The inclined tongue rod 312 is fixed on the first driving plate 61 in a penetrating way, and one side of the main driving piece 3421 away from the handle shaft 5 is positioned between the first fixing plate 313 and the first driving plate 61. When the door is closed, the inclined tongue 311 is extruded, the inclined tongue rod 312 is retracted, and the first driving plate 61 is driven to slide towards the trigger seat 331; the main driving member 3421 rotates to drive the trigger transmission member 332 to move to the avoiding position, when the inclined tongue 311 extends into the inclined tongue 311 hole, the inclined tongue rod 312 automatically extends out for resetting under the action of the resetting force of the first biasing member 32, and drives the first driving plate 61 to move towards the locking direction, and the first driving plate 61 drives the main driving member 3421 to rotate for resetting.

Referring to fig. 8, the main latch mechanism includes a latch plate 12, and a stopper pin, a retaining pin 111, and a main latch 13 are provided on the latch plate 12. The delay trigger mechanism further comprises a gear transmission mechanism comprising a second fixed shaft 71 fixed on the housing 2, a first gear 72, a second gear 73, a third gear 74 and a hanging pin 75. The first gear 72 and the second gear 73 are coaxially and rotatably connected to the second fixed shaft 71 and are respectively located at the upper side and the lower side of the latch plate 12, and the first gear 72 is engaged with the lock gear. The hanging pin 75 is fixed on the first gear 72 and the second gear 73, a first groove body 121 and a fifth guide hole 122 are arranged on the first gear 72, the first groove body 121 comprises a first groove section, a second groove section and a third groove section, the second groove section is perpendicular to the locking direction of the locking bolt plate 12, and the fifth guide hole 122 is perpendicular to the second groove section. The second fixing shaft 71 is penetrated in the fifth guide hole 122. The third gear 74 is connected to the handle shaft 5 by a one-way clutch mechanism, and the second gear 73 is meshed with the third gear 74. The first gear 72 is provided with a first protrusion 721, and the main driving member 3421 is provided with a second protrusion 34211 which is engaged with the first protrusion 721.

When the door is opened by the key, the lock is turned by the key, referring to fig. 2, the lock gear rotates clockwise and drives the first gear 72 to rotate anticlockwise, the hanging pin 75 rotates into the second groove section and continues to rotate to drive the lock tongue plate 12 to move towards the locking direction, the hanging pin 75 rotates into the third groove section, the lock tongue plate 12 is locked, and the locking hook hooks the locking pin 112 to keep the main lock tongue mechanism in a locked state. Continuing to screw the key again, the first gear 72 continues to rotate and the latch plate 12 is fixed, when the first protrusion 721 abuts against the second protrusion 34211, the first gear 72 rotates to drive the main driving member 3421 to rotate, the main driving member 3421 rotates to drive the auxiliary driving member to rotate, the trigger seat 331 and the trigger transmission member 332 are pushed to the avoiding position, and the trigger transmission member 332 is prevented from driving the passive trigger part and the main latch 13 to be locked out.

When the handle is opened, the handle shaft 5 is screwed, the third gear 74 rotates to drive the first gear 72 and the second gear 73 to rotate, the hanging pin 75 drives the locking pin 112 to move to the locking hook, the locking hook hooks the locking pin 112 to unlock and keep at the locking position, the handle shaft 5 continues to rotate, the handle shaft 5 drives the main driving piece 3421 to rotate, and the trigger seat 331 and the trigger transmission piece 332 are driven to push to the avoiding position.

When the delay trigger mechanism is applied to a door lock body, the main lock tongue mechanism drives the locking pin 112 to move to the locking hook under the action of key acting force or the handle shaft 5, the locking pin 112 pushes the locking hook to enable the locking part 411 to rotate back to the holding hook against the biasing force of the second biasing member 42, and after the locking pin 112 passes over the locking hook, the locking hook automatically resets under the action of the second biasing member 42 to clamp the locking pin 112 and is in a locking position.

After unlocking, the fan body is opened, the key is continuously screwed or the handle shaft 5 is screwed, the main driving piece 3421 drives the trigger seat 331 and the trigger transmission piece 332 to move to the avoiding position, the trigger transmission piece 332 cannot trigger the passive trigger part of the locking member, and the main lock tongue mechanism keeps the locked state.

When the fan is closed, the key or the handle is released, and the trigger seat 331 is automatically reset to the trigger position under the action of the third biasing member 341. The inclined tongue 311 contacts the door frame to be extruded, the inclined tongue rod 312 is driven to retract to push the trigger transmission piece 332, the trigger transmission piece 332 pushes the passive trigger end on the holding part 412, the holding part 412 rotates and the locking part 411 is pushed by the stop block 43 to rotate back to the locking pin 112, and the locking hook is separated from the locking pin 112 to be unlocked; referring to fig. 1, the retaining hook rotates toward the retaining pin 111 and hooks the retaining pin 111 in the retaining position and the primary latch mechanism is not yet locked out. After the door frame continues to be closed, the inclined tongue 311 stretches into the inclined tongue 311 hole, the inclined tongue rod 312 moves towards the locking position under the action of the first biasing member 32 to reset and separate from the trigger transmission member 332, the inclined tongue 311 stretches out of the shell 2, the acting force acting on the passive trigger part disappears, the locking part 411 resets towards the locking pin 112 under the action of the second biasing member 42 to rotate and pushes the retaining part 412 to rotate back to the retaining pin 111 through the stop block 43, during the rotation process, the main locking tongue mechanism moves towards the locking direction for a certain distance, so that the locking pin 112 exceeds the locking range of the locking hook, and the main locking tongue mechanism continues to move towards the locking direction to realize locking.

As a first alternative embodiment of embodiment 1, the trigger seat 331 may be of any other shape, as long as it can move between the trigger position and the avoiding position, and can mount the trigger transmission member 332, and the contact end of the auxiliary driving member 3422 may be directly plugged into the trigger seat 331, or fixed to the trigger seat 331.

As a second alternative of embodiment 1, the main driving member 3421 may further include a plurality of gears, and the handle shaft 5 may rotate and then drive the auxiliary driving member 3422 to deflect back toward the passive triggering portion through the gear transmission.

As a third alternative embodiment of example 1, the trigger actuator 332 may also be rotatably mounted within the housing 2, for example, the trigger actuator 332 may be rotatably mounted on the latch lever 312 or rotatably mounted on the trigger seat 331, with the contact end of the auxiliary driving member 3422 contacting the trigger actuator 332 and pushing the active trigger end of the trigger actuator 332 to rotate away from the passive trigger end, such that the trigger actuator 332 is in the retracted position.

As a fourth alternative embodiment of embodiment 1, the locking portion 411 and the holding portion 412 may also be rotatably mounted on two fixed shafts as long as they can be switched between the locking position and the holding position by the first linkage mechanism to form a linked relationship. For example, the stopper 43 may not be provided, and the second extension portion of the locking portion 411 may directly extend to a side surface of the first extension portion of the holding portion 412 facing away from the trigger seat 331, and when the holding portion 412 rotates, the locking portion 411 is driven to rotate, so as to form a linkage between the two.

As a variant, the locking portion 411 and the holding portion 412 are also provided in the housing 2 so as to be able to translate and slide, and when the sectors are closed, the trigger drives the holding portion to slide towards the stopper 11, the locking portion 411 to slide against the stopper 11, and the locking member is shifted between the locking position and the holding position by means of translation.

Example 2

The present embodiment provides a lock body including the delay trigger mechanism of embodiment 1.

The lock body with the structure realizes delayed locking through the movement of the locking member between the locking position and the holding position, ensures that the first trigger end completely stretches into the door frame hole and then locks, ensures that the main lock tongue 13 stretches into the lock tongue hole, and prevents false locking; meanwhile, the door frame is prevented from being closed after the lock tongue pops up, noise during closing can be effectively reduced, and the door frame and the lock tongue are prevented from being damaged. The locking device can avoid the situation that the locking bolt member cannot be effectively locked at the locking position due to movement abrasion between the sliding pin and the hollow feeler lever, and can stably and reliably control the locking in and the locking out of the main locking bolt mechanism.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (21)

1. A time delay trigger mechanism, comprising

The stop piece (11) is arranged in the shell (2) and is fixed on the main bolt mechanism;

A trigger assembly having a trigger member reciprocally disposed within a housing (2) between a locked position and an unlocked position, and a first biasing member (32) disposed between said trigger member and said housing (2) for biasing said trigger member toward said locked position; the first trigger end of the trigger piece stretches out of and retracts into the shell (2) in the reciprocating movement, and the trigger piece is also provided with an active trigger part;

A lock assembly having a lock member provided in the housing (2) so as to be reciprocally movable between a lock position and a holding position, and a second biasing member (42) provided between the lock member and the housing (2) to apply a biasing force to the lock member in the lock position; the locking component is provided with a passive trigger part which is matched with the active trigger part of the trigger piece to drive the locking component to move from the locking position to the holding position in the process of moving the trigger piece from the locking position to the locking position; the locking member further has a locking portion (411) adapted to cooperate with the stopper (11) to prevent the main tongue mechanism from moving in a locking out direction in a locked position;

It is characterized in that

The locking member further comprises a holding part (412) which is matched with the stop piece (11) at a holding position and prevents the main lock tongue mechanism from moving towards the locking direction, one of the holding part (412) and the stop piece (11) is provided with a contact point, a holding point and a sliding edge which connects the contact point and the holding point; at the contact point, the contact position of the locking member with the stopper (11) is biased more toward the locking out direction of the main latch mechanism than the position where the stopper (11) is disengaged from the locking portion (411), and at the holding position of the locking member, the stopper (11) cooperates with the holding point to hold the main latch mechanism in the locking in position.

2. The time delay trigger mechanism of claim 1, wherein the contact point, the holding point and the sliding edge connecting the contact point and the holding point are all provided on the holding portion (412).

3. The time delay trigger mechanism according to claim 1 or 2, characterized in that the locking part (411) is a member movable relative to the holding part (412), the locking part (411) and the holding part (412) being connected by a first linkage mechanism; the first linkage mechanism keeps the locking part (411) and the holding part (412) to move synchronously when the passive trigger part is driven by the active trigger part; when the main latch mechanism moves towards the locking direction, the first linkage mechanism is suitable for enabling the locking part (411) to move relative to the retaining part (412) under the pushing of the stopping piece (11) so as to open the moving path of the stopping piece (11), and after the main latch mechanism reaches the locking position, the locking part (411) resets and moves under the action of the biasing force and is matched with the stopping piece (11) to prevent the main latch mechanism from moving towards the locking direction.

4. A time delay trigger mechanism as claimed in claim 3, wherein said first linkage mechanism comprises a stopper (43) fixed to one of said lock part (411) and said holding part (412) and a reset bias member for resetting after moving said lock part (411); the stop (43) is adapted to keep the locking portion (411) moving synchronously with the holding portion (412) when the passive trigger portion is driven by the active trigger portion, and to not influence the locking portion (411) to move alone relative to the holding portion (412) when the main latch mechanism moves in the latch direction.

5. The time delay trigger mechanism of claim 4, wherein said stopper (43) is provided on said holding portion (412), and said second biasing member (42) also functions as said return biasing member.

6. A time delay trigger mechanism as claimed in claim 3, wherein the stop (11) is a stop pin fixed to the main latch mechanism; the holding part (412) is a holding hook formed on the locking member, and the locking part (411) is a locking hook formed on the locking member; the hook-shaped ends of the holding hook and the locking hook are opposite, and the stop pin is suitable for passing between the two hook-shaped ends.

7. The time delay trigger mechanism of claim 6, wherein the retaining pins comprise retaining pins (111) respectively secured to the master latch mechanism and cooperating with the retaining hooks, and locking pins (112) cooperating with the locking hooks.

8. The time delay trigger mechanism of claim 7, wherein the locking pin (112) is biased relative to the retaining pin (111) to a position in which the main latch mechanism is locked out.

9. A time delay trigger mechanism as claimed in claim 3, wherein said locking member is rotatably provided in said housing (2) by a first fixed shaft (44) provided in said housing (2) to constitute a lever with said first fixed shaft (44) as a fulcrum;

Wherein the passive trigger part is positioned on one side of a power arm of the lever relative to the trigger acting force of the active trigger part of the trigger assembly;

The holding part (412) and the locking part (411) are positioned on the resistance arm side of the lever relative to the triggering force of the active triggering part of the triggering assembly.

10. The time delay trigger mechanism according to claim 9, wherein the lock portion (411) is rotatably mounted on the first fixed shaft (44) coaxially with the holding portion (412), and an axial center of the first fixed shaft (44) is disposed near an extension line of a lock-out and lock-in direction of the stopper (11) to which the lock portion (411) acts.

11. The time delay trigger mechanism of claim 1 or 2, wherein the trigger assembly further comprises

The trigger seat (331) component is arranged in the shell (2) in a switching manner between a trigger state of establishing transmission between the active trigger part and the passive trigger part and an avoidance state of disconnecting the transmission between the active trigger part and the passive trigger part;

The avoidance driving component is arranged in the shell (2), and the trigger seat (331) component is converted into an avoidance state after the main lock tongue (13) component reaches a locking position; and when the trigger piece reaches the locking position, the avoidance driving component converts the trigger seat (331) component into a trigger state.

12. The time delay trigger mechanism of claim 11, wherein said back-out drive assembly comprises a third biasing member (341) that applies a force to said trigger assembly tending to maintain a triggered state; and the driving assembly is driven by unlocking acting force to convert the trigger seat assembly into an avoidance state.

13. The time delay trigger mechanism of claim 12, characterized in that the trigger block (331) assembly has a trigger block (331) mounted in a first movement within the housing (2) and a trigger transmission (332) mounted on the trigger block (331) in a second movement; one of the first and second modes of movement directs the trigger transmission member (332) to participate in the transmission between the active trigger portion and the passive trigger portion in the trigger state, and the other mode of movement directs the trigger transmission member (332) to move between a trigger position constituting the trigger state and an avoidance position constituting the avoidance state against the biasing force of the third biasing member (341) by the force of the drive assembly.

14. The time delay trigger mechanism of claim 13, wherein the trigger seat (331) is translationally slidably mounted within the housing (2), the trigger transmission member (332) is translationally slidably mounted on the trigger seat (331), and the translational sliding of the trigger seat (331) drives the trigger transmission member (332) to switch between a trigger position and an avoidance position; the third biasing member (341) is disposed between the trigger seat (331) and the housing (2).

15. The delay trigger mechanism of claim 14, wherein the trigger seat (331) has a seat bottom plate slidably arranged in cooperation with the housing (2), and a first pin slot guide mechanism (333) extending in a moving direction of the trigger position and the avoidance position is arranged between the seat bottom plate and a corresponding position of the housing (2);

The trigger seat (331) is also provided with a seat top plate matched with the trigger transmission piece (332) in a sliding mode, and a second pin groove guide mechanism (334) extending along the moving direction of the active trigger part is arranged between the seat top plate and the trigger transmission piece (332).

16. The time delay trigger mechanism of claim 12, characterized in that the drive assembly has a main drive member (3421) connected to the handle shaft (5) and/or to the lock head via a one-way clutch mechanism and/or via a gear transmission mechanism, respectively, the active end of the main drive member (3421) being adapted to drive the trigger seat (331) assembly into action.

17. The time delay trigger mechanism of claim 16, wherein said drive assembly further has a secondary drive member (3422) disposed between an active end of said primary drive member (3421) and said trigger seat (331); the auxiliary driving piece (3422) is rotatably arranged on the shell (2), is deflected under the action of the action end of the main driving piece (3421), and drives the trigger seat (331) to move through the contact end of the auxiliary driving piece and the trigger seat (331).

18. The time delay trigger mechanism of claim 17, wherein a first protrusion is provided at an end of the main driving member (3421) facing the auxiliary driving member, and a first recess cooperating with the first protrusion is provided at a side of the auxiliary driving member facing the main driving member (3421); and in an avoidance state, the first protruding part slides to one side, close to the trigger seat (331), of the first recessed part so as to drive the other end of the auxiliary driving part to deviate from the passive trigger part for movement.

19. The time delay trigger mechanism of claim 18, wherein an end of the trigger seat (331) adjacent to the auxiliary driving member has a U-shaped cross section, and a first accommodating cavity into which the contact end of the auxiliary driving member extends is formed.

20. The time delay trigger mechanism of claim 16, wherein a second linkage is provided between said main drive member (3421) and said first biasing member (32), said first biasing member (32) exerting a reset biasing force on said main drive member (3421) through said second linkage.

21. A lock body comprising a time delay trigger mechanism as claimed in any one of claims 1 to 20.