CN120739412B

CN120739412B - A multi-stage gear linkage automatic locking mechanism for prison doors

Info

Publication number: CN120739412B
Application number: CN202511260864.1A
Authority: CN
Inventors: 仇顺青; 仇意柯; 朱银洪
Original assignee: Jingjiang Shuangdun Public Safety Equipment Co ltd
Current assignee: Jingjiang Shuangdun Public Safety Equipment Co ltd
Priority date: 2025-09-04
Filing date: 2025-09-04
Publication date: 2025-10-31
Anticipated expiration: 2045-09-04
Also published as: CN120739412A

Abstract

The invention relates to the technical field of lockset transmission devices, in particular to a multistage gear linkage type automatic locking mechanism of a monitoring gate. Including door frame, door frame articulated door body, first jam plate and two second jam plates, the articulated department of door frame and door body is equipped with first torsional spring, rotates on the door body and installs the axle, and is equipped with the spacing electron locking system of axle electron, installs driving gear on the axle, all is equipped with the spring bolt of door body sliding connection on first jam plate and the second jam plate, installs the guide post on the first jam plate, slides on the guide post and has the internal tooth strip of being connected with driving gear transmission, the cover is equipped with the spacing spring who prescribes a limit to internal tooth strip position on the guide post. The invention has the beneficial effects that the traditional multi-bolt structure has the defects that the bolts are not synchronous in expansion and contraction due to loose transmission links and uneven stress, and part of bolts cannot be completely embedded into lock holes to form a half-lock state.

Description

Multistage gear linkage type automatic locking mechanism of monitoring gate

Technical Field

The invention relates to the technical field of lockset transmission devices, in particular to a multistage gear linkage type automatic locking mechanism of a monitoring gate.

Background

In special security places such as monitoring stations, guardianship stations, prisons, etc., the locking safety and the reliability of the door body directly relate to the supervision order and personnel safety, and are core components of a security system, and the traditional monitoring station door locking mechanism adopts a single lock tongue or a simple mechanical linkage structure, so that a plurality of technical defects are gradually exposed in long-term use:

The traditional multi-bolt structure often causes asynchronous bolt expansion and contraction due to loose transmission links and uneven stress, part of bolts cannot be completely embedded into lock holes to form a half-lock state, and potential safety hazards of illegal opening exist;

on the other hand, the traditional mechanical locking relies on a single mechanical structure, lacks an electronic monitoring and active early warning mechanism, is easy to be pried by violence and broken by tools, and part of the mechanism is exposed when the door body is opened, so that a person under the control can pry the door body or insert tools to unlock the door body by taking the door body as a fulcrum, potential escape risks exist on the structure, in addition, manual locking operation relies on human intervention, and if operation omission easily forms a semi-opening and semi-closing state, security and protection holes are further amplified;

moreover, the traditional mechanism lacks effective mechanical energy storage and unidirectional locking design, and the locking can be realized only by completely closing the door by external force, so that the locking failure can be caused by insufficient external force under emergency conditions;

based on the above, the present invention provides a multi-stage gear linkage type automatic locking mechanism for a monitor door to solve the above-mentioned problems in the prior art.

Disclosure of Invention

The traditional multi-bolt structure has the defects that the bolts are not synchronous in expansion and contraction due to loose transmission links and uneven stress, and part of bolts cannot be completely embedded into lock holes to form a half-lock state.

The technical scheme includes that the multi-stage gear linkage type automatic locking mechanism of the monitoring door comprises a door frame, a door body hinged with the door frame, a first locking plate and two second locking plates, wherein a first torsion spring is arranged at the hinged position of the door frame and the door body, a handle shaft is rotatably arranged on the door body, an electronic locking system for limiting the handle shaft electronically is fixedly arranged on the door body, a driving gear is arranged on the handle shaft, locking bolts which are in sliding connection with the door body are arranged on the first locking plate and the second locking plate, a guide post is arranged on the first locking plate, an internal tooth bar which is in transmission connection with the driving gear is arranged on the guide post in a sliding manner, a limiting spring for limiting the position of the internal tooth bar is sleeved on the guide post, and a lock hole is formed in the door frame and corresponds to the position of each locking bolt;

A group of elastic connecting pieces are connected to the two second locking plates, the other ends of the two elastic connecting pieces are connected to the driving plates, a synchronization system is arranged on the door body, the first locking plates and the second locking plates are linked through the synchronization system and synchronously approach or depart from the door body, and a trigger system is arranged at the top and the bottom of the door body;

The trigger system comprises a guide groove arranged on a door frame, a positioning hole arranged on the guide groove, a trigger rod connected to the door body in a sliding manner, a ratchet shaft, an energy storage shaft and a scroll, wherein the ratchet shaft, the energy storage shaft and the scroll are rotationally connected to the door body, the trigger rod is provided with a trigger spring, the rotational connection part of the energy storage shaft and the ratchet shaft with the door body is provided with a second torsion spring, the ratchet shaft is provided with a one-way pawl, the energy storage shaft is provided with an energy storage gear matched with the one-way pawl, the energy storage gear stores energy when the energy storage gear is far away from the door body through a second locking plate, and a locking system is arranged between the one-way pawl and the scroll.

As the preferable technical scheme of the invention, the locking system comprises an arc gear ring arranged on a unidirectional pawl, the bottom end of a trigger rod is provided with an outer rack meshed with the arc gear ring, one reel is linked with the inner rack, a steel rope is wound on the reel, the other end of the steel rope is fixedly connected with the outer rack, reels in the two trigger systems are linked through a synchronous gear belt, and the steel rope pulls the outer rack to be meshed with the arc gear ring when the reels are wound.

As a preferable technical scheme of the invention, the synchronous system comprises an intermediate gear rotationally connected to a door body, two driving plates are fixedly provided with tooth frames, the two tooth frames are provided with first tooth surfaces, the two first tooth surfaces are in transmission connection with the intermediate gear, the two first tooth surfaces are respectively arranged on two sides of the intermediate gear, two sides of an internal tooth bar are respectively provided with a second tooth surface and a third tooth surface, the second tooth surface is in transmission connection with the intermediate gear, the third tooth surface is in meshed connection with the driving gear, and two groups of symmetrically arranged reset springs are respectively arranged between the first lock plate and the door body and between the second lock plate and the door body.

As a preferable technical scheme of the invention, each elastic connecting piece comprises a T-shaped pull rod arranged on the driving plate, the T-shaped pull rod is in sliding connection with the second locking plate, the top end of the T-shaped pull rod is provided with a convex annular edge, and a compression spring is sleeved on the T-shaped pull rod and corresponds to the position between the convex annular edge and the second locking plate.

As the preferable technical scheme of the invention, the electronic locking system comprises a central control panel and an electric push rod which are arranged on a door body, a self-locking gear is arranged on a handle shaft, a locking plate matched with the self-locking gear is arranged at the movable end of the electric push rod, an audible and visual alarm, a vibration sensor and an audio acquisition sensor are respectively arranged on the door body, and the data end of the audible and visual alarm, the data end of the vibration sensor and the audio acquisition sensor and the electric control end of the electric push rod are respectively connected with the central control panel in a data mode.

As a preferable technical scheme of the invention, the triggering system further comprises a fourth tooth surface arranged on the rack, the fourth tooth surface is meshed with the energy storage gear, a driven inclined surface is fixedly arranged at the top end of the triggering rod, a guide inclined surface matched with the driven inclined surface is fixedly arranged on the door frame, and the included angles between the driven inclined surface and the horizontal plane are 45 degrees.

As an optimal technical scheme of the invention, the handle is arranged on the handle shaft, the door body is fixedly provided with a hinge shaft hinged with the door frame, the first torsion spring is arranged at the rotating connection part of the hinge shaft and the door frame, the lock tongue is made of high-carbon alloy steel, and the door body is made of stainless steel.

As the preferable technical scheme of the invention, the trigger rod is provided with the limiting ring, the trigger spring is sleeved on the trigger rod, two ends of the trigger spring are fixedly connected with the limiting ring and the door body respectively, the height of the trigger rod is 1.2-1.3 times of the height of the guide groove, the guide groove is an arc-shaped groove, and the arc center of the guide groove is arranged on the axis of the hinge shaft.

As a preferable technical scheme of the invention, the pretwist direction of the second torsion spring on the energy storage shaft is set to be the direction for driving the energy storage gear to face the fourth tooth surface of the meshing rack, the pretwist direction of the second torsion spring on the ratchet shaft is set to be the direction for driving the unidirectional pawl to face the meshing energy storage gear, and the first torsion spring and the second torsion spring are made of spring steel materials.

As a preferred technical scheme of the invention, the winding gear is fixedly arranged on the winding shaft and is in meshed connection with the second tooth surface.

The beneficial effects of the invention are as follows:

1. The invention solves the problem through the multi-stage gear cooperative transmission of a synchronous system, the driving gear on the door body receives power through the third tooth surface of the inner rack, the second tooth surface of the inner rack drives the middle gear to rotate, the middle gear simultaneously meshes with the first tooth surfaces of the racks on two sides to drive the two second lock plates to synchronously approach or separate from the door body, the reset spring assists the lock plates to reset after the power is released, the lock plates on the first lock plates and the two second lock plates are ensured to synchronously stretch, the single driving source and the gears of multiple execution ends are in linkage design, the accurate synchronous action of the side surface, the top and the bottom of the door body is realized, the half-locking risk caused by the loose transmission of the traditional structure is avoided, and the locking reliability is improved from the mechanical transmission source.

2. The traditional mechanical locking relies on a single structure, lacks electronic monitoring and early warning, is easy to be broken by violence and has no abnormal response, the invention fuses the cooperative protection of an electronic locking system and the mechanical locking, in the electronic locking system, a central control panel is linked with an electric push rod, a self-locking gear, a locking plate, a vibration sensor and an audio acquisition sensor, when a door body is prized by violence or abnormal sound occurs, the sensor captures signals in real time and triggers the electric push rod to drive the locking plate to clamp the self-locking gear, thus realizing the electronic forced limit of a shaft, and simultaneously, an audible and visual alarm immediately starts early warning.

3. The invention realizes automatic and reliable locking through the cooperative design of the triggering system and the energy storage mechanism, when the door body is opened, the rack drives the energy storage gear to rotate, so that the second torsion spring on the energy storage shaft can finish energy storage, the unidirectional pawl is matched with the energy storage gear to realize unidirectional locking and store energy, in the door closing process, the triggering rod is matched with the compression triggering spring through a 45-degree inclined plane to drive the outer rack to be engaged with the arc gear ring of the unidirectional pawl to release limit, the second torsion spring releases energy to drive the lock tongue to be embedded into the lock hole, and the mechanical logic of opening energy storage, closing energy release and automatic locking is eliminated, thus the dependence on the external force of closing the door is eliminated, the locking action can be ensured to be in place even under the emergency, and the security vulnerability of the traditional manual locking, which is easy to be caused by operation omission or insufficient external force, is solved.

4. The traditional lock tongue is easy to cause friction interference and door body blocking, and has the escape risk of being utilized, the invention adopts the dynamic built-in structure of the lock tongue, when the door body is opened, the lock tongue is completely built-in the door body under the drive of the synchronous system, the friction interference with the door frame and the ground is avoided, the door body is ensured to rapidly and smoothly rotate under the action of the first torsion spring, meanwhile, the built-in design wraps the lock tongue transmission path and the core structure in the door body, the opportunity of observing and researching the lock by an on-press person is reduced, the risk of utilizing the exposed lock tongue to pry the door body or to insert a tool for unlocking is prevented, the design not only improves the emergency response efficiency of opening and closing the door body, reduces the abrasion and maintenance cost of the lock tongue, but also strengthens the anti-destruction capability through the structure hiding property, and the potential safety hazard and operation defect of the traditional exposed lock tongue are solved in a targeted way.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a multi-stage gear linked automatic locking mechanism for a monitor door;

FIG. 2 is a schematic structural diagram of a central control panel;

FIG. 3 is a schematic view of the structure of the positioning hole and the guide groove;

FIG. 4 is a schematic view of a partial enlarged structure at A in FIG. 3;

FIG. 5 is a schematic view of a partial enlarged structure at B in FIG. 3;

FIG. 6 is a schematic view of the structure of the intermediate gear and the first lock plate;

FIG. 7 is a schematic view of a partial enlarged structure at C in FIG. 6;

FIG. 8 is a schematic view of a partial enlarged structure at D in FIG. 6;

FIG. 9 is a schematic view of the driven ramp and outer rack configuration;

fig. 10 is a schematic view of the structure of the internal rack and the intermediate gear;

FIG. 11 is a schematic view of the driven ramp and latch bolt;

Fig. 12 is a schematic structural view of the first torsion spring.

In the drawings, the list of components represented by the various numbers is as follows:

1. door frame, 2, door body, 3, first lock plate, 4, second lock plate, 5, first torsion spring, 6, handle shaft, 7, driving gear, 8, lock tongue, 9, guide post, 10, inner tooth bar, 11, limit spring, 12, lock hole, 13, driving plate, 14, guide groove, 15, positioning hole, 16, trigger rod, 17, ratchet shaft, 18, energy storage shaft, 19, reel, 20, second torsion spring, 21, unidirectional pawl, 22, energy storage gear, 23, arc gear ring, 24, outer tooth bar, 25, steel rope, 26, intermediate gear, 27, tooth frame, 28, reset spring, 29, elastic connector, 30, central control panel, 31, electric push rod, 32, self-locking gear, 33, locking plate, 34, audible and visual alarm, 35, vibration sensor, 36, audio acquisition sensor, 37, driven inclined plane, 38, handle, 39, hinge shaft, 40, winding gear, 41, trigger spring.

Detailed Description

The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.

As shown in figures 1-12, the invention provides a multi-stage gear linkage type automatic locking mechanism of a monitor door, which comprises a door frame 1, a door body 2 hinged with the door frame 1, a first locking plate 3 and two second locking plates 4, wherein a first torsion spring 5 is arranged at the hinge position of the door frame 1 and the door body 2, a handle shaft 6 is rotatably arranged on the door body 2, and an electronic locking system for electronically limiting the handle shaft 6 is fixedly arranged;

by the arrangement of the first torsion spring 5, the door body 2 has a trend of automatically approaching the door frame 1, so that the door body 2 can be automatically closed and locked when no external force is introduced;

The handle 38 is arranged on the handle shaft 6, and the door body 2 is fixedly provided with a hinge shaft 39 hinged with the door frame 1;

The electronic locking system comprises a central control panel 30 and an electric push rod 31 which are arranged on a door body 2, a self-locking gear 32 is arranged on a handle shaft 6, a locking plate 33 matched with the self-locking gear 32 is arranged at the movable end of the electric push rod 31, an audible and visual alarm 34, a vibration sensor 35 and an audio acquisition sensor 36 are respectively arranged on the door body 2, and the data ends of the audible and visual alarm 34, the vibration sensor 35 and the audio acquisition sensor 36 and the electric control end of the electric push rod 31 are respectively in data connection with the central control panel 30;

the central control panel 30 is linked with the electric push rod 31, the self-locking gear 32, the locking plate 33 and various sensors through an electronic locking system, so that triple safety guarantee of electronic monitoring, mechanical locking and abnormal early warning is formed;

When the door body 2 is subjected to violent prying, vibration or abnormal sound, the vibration sensor 35 and the audio acquisition sensor 36 capture signals in real time and transmit the signals to the central control panel 30, the central control panel 30 immediately controls the electric push rod 31 to drive the locking plate 33 to be clamped with the self-locking gear 32, so that the electronic forced limiting of the handle shaft 6 is realized, illegal opening is prevented, meanwhile, the audible and visual alarm 34 is started to give out warning, the problems that the traditional prison door is easily damaged by violent locking only by relying on machinery and lacks an active early warning function are solved, and the illegal opening prevention capability and the safety early warning timeliness of the door body 2 are remarkably improved;

The central control panel 30 is internally provided with an electronic password program, and when the electronic password program does not input a correct password, the locking plate 33 is clamped with the self-locking gear 32, so that electronic self-locking is realized;

meanwhile, when the door body 2 is used, the door body can be opened only in one direction by one side of the central control panel 30;

the central control panel 30 is internally provided with a standby emergency power supply for supplying power to the door body 2 in an emergency or power-off state;

the handle shaft 6 is provided with a driving gear 7, and the first lock plate 3 and the second lock plate 4 are respectively provided with a lock tongue 8 which is in sliding connection with the door body 2;

The stroke design of the lock tongue 8 meets the requirement of being completely retracted into the door body by more than 2 mm;

the lock tongue 8 is made of high-carbon alloy steel, and the door body 2 is made of stainless steel;

A guide post 9 is arranged on the first lock plate 3, an internal tooth bar 10 in transmission connection with the driving gear 7 is slidingly arranged on the guide post 9, and the internal tooth bar 10 is in transmission connection with the driving gear 7;

The second tooth surface and the third tooth surface are respectively arranged on two sides of the inner rack 10;

The third tooth surface is in meshed connection with the driving gear 7;

A limiting spring 11 for limiting the position of the inner rack 10 is sleeved on the guide post 9, and a lock hole 12 is formed in the door frame 1 and corresponds to the position of each lock tongue 8;

A group of elastic connecting pieces 29 are connected to the two second lock plates 4, and the other ends of the two elastic connecting pieces 29 are connected with the driving plates 13;

Each elastic connecting piece 29 comprises a T-shaped pull rod arranged on the driving plate 13, the T-shaped pull rod is in sliding connection with the second locking plate 4, the top end of the T-shaped pull rod is provided with a convex annular edge, and a compression spring is sleeved on the T-shaped pull rod and corresponds to the position between the convex annular edge and the second locking plate 4;

The door body 2 is provided with a synchronizing system, and the first locking plate 3 and the second locking plate 4 are linked through the synchronizing system and synchronously approach to or depart from the door body 2;

The synchronous system comprises an intermediate gear 26 rotatably connected to the door body 2, two driving plates 13 are fixedly provided with tooth frames 27, the two tooth frames 27 are provided with first tooth surfaces, the two first tooth surfaces are in transmission connection with the intermediate gear 26, and the two first tooth surfaces are respectively arranged on two sides of the intermediate gear 26;

the second tooth surface is in transmission connection with the intermediate gear 26, and two groups of symmetrically arranged reset springs 28 are respectively arranged between the first lock plate 3 and the door body 2 and between the second lock plate 4 and the door body 2;

The synchronous system constructs an accurate linkage mechanism of a single driving source and multiple execution ends through the meshing transmission of the intermediate gear 26 with tooth surfaces of the tooth frames 27 and the inner tooth bars 10, when the shaft 6 drives the driving gear 7 to rotate, the inner tooth bars 10 receive power through a third tooth surface and drive the intermediate gear 26 to rotate through a second tooth surface, the intermediate gear 26 simultaneously meshes with the first tooth surfaces of the tooth frames 27 at two sides, so that the two second lock plates 4 and the first lock plates 3 are synchronously close to or far away from the door body 2, and the reset spring 28 assists the lock plates to reset after the power is released;

the structure solves the problems that the locking plate actions of the traditional multi-bolt 8 door body 2 are asynchronous and part of bolts 8 cannot be reliably locked, ensures that the bolts 8 on the side face, the top and the bottom of the door body 2 are simultaneously telescopic, realizes omnibearing synchronous locking, and improves the overall reliability and safety of a locking mechanism;

The first tooth surfaces of the intermediate gear 26 and the tooth frames 27 on the two sides are externally meshed, the transmission ratio is 1:1, and the synchronous displacement of the two second locking plates 4 is ensured;

the top and the bottom of the door body 2 are provided with trigger systems;

The triggering system comprises a guide groove 14 arranged on the door frame 1, a positioning hole 15 arranged on the guide groove 14, a triggering rod 16 connected to the door body 2 in a sliding manner, a ratchet shaft 17 connected to the door body 2 in a rotating manner, an energy storage shaft 18 and a scroll 19;

the trigger lever 16 is provided with a trigger spring 41;

The trigger rod 16 is provided with a limiting ring, the trigger spring 41 is sleeved on the trigger rod 16, two ends of the trigger spring 41 are respectively fixedly connected with the limiting ring and the door body 2, the height of the trigger rod 16 is 1.25 times that of the guide groove 14, the guide groove 14 is an arc-shaped groove, and the arc center of the guide groove 14 is arranged on the axis of the hinge shaft 39;

The energy storage shaft 18 and the ratchet shaft 17 are respectively provided with a second torsion spring 20 at the rotation connection part with the door body 2;

The pretwist direction of the second torsion spring 20 on the energy storage shaft 18 is set to be the direction of driving the energy storage gear 22 to the fourth tooth surface of the meshing rack 27, the pretwist direction of the second torsion spring 20 on the ratchet shaft 17 is set to be the direction of driving the unidirectional pawl 21 to the meshing energy storage gear 22, and the first torsion spring 5 and the second torsion spring 20 are made of spring steel materials;

The triggering system further comprises a fourth tooth surface arranged on the rack 27, the fourth tooth surface is meshed with the energy storage gear 22, a driven inclined surface 37 is fixedly arranged at the top end of the triggering rod 16, a guide inclined surface matched with the driven inclined surface 37 is fixedly arranged on the door frame 1, and the included angles between the driven inclined surface 37 and the guide inclined surface and the horizontal plane are 45 degrees;

The ratchet shaft 17 is provided with a one-way pawl 21, the energy storage shaft 18 is provided with an energy storage gear 22 matched with the one-way pawl 21, the energy storage gear 22 stores energy when being far away from the door body 2 through the second locking plate 4, and a locking system is arranged between the one-way pawl 21 and the scroll 19;

The locking system comprises an arc gear ring 23 arranged on a unidirectional pawl 21, an outer rack 24 meshed with the arc gear ring 23 is arranged at the bottom end of a trigger rod 16, one reel 19 is in linkage with the inner rack 10, a steel rope 25 is wound on the reel 19, the other end of the steel rope 25 is fixedly connected with the outer rack 24, the reels 19 in the two trigger systems are in linkage through a synchronous gear belt, and the steel rope 25 pulls the outer rack 24 to be meshed with the arc gear ring 23 when the reels 19 are wound;

when the door body 2 is in an open state, the outer gear rack 24 is disengaged from the arc gear ring 23 through the specification setting of the outer gear rack 24, and the unidirectional pawl 21 and the ratchet shaft 17 can move freely in a follow-up mode;

the winding gear 40 is fixedly arranged on the winding shaft 19, and the winding gear 40 is in meshed connection with the second tooth surface;

The trigger system realizes automatic and reliable locking after the door body 2 is closed and smooth unlocking when the door body is opened through the cooperative design of mechanical energy storage, unidirectional locking and inclined plane triggering;

When the door body 2 is in non-contact with the door frame 1, each lock tongue 8 is hidden in the door body 2, and through the realization of the state that the lock tongue 8 is hidden in the door body 2 when the door body 2 is opened, on one hand, the potential safety hazard in the opening process can be eliminated, the risk of violent blocking and escaping is prevented, the security and protection loopholes caused by the blocking and half-opening and half-closing of the door body 2 due to the exposure of the lock tongue 8 when the traditional lockset is opened are avoided, and the potential escape path is structurally cut off by the unlocking problem that the door body 2 is pried by the personnel under the control of the exposure of the lock tongue 8 and the penetrating tool is utilized;

Secondly, the smoothness of opening and closing of the door body 2 can be ensured, the emergency response efficiency is improved, the concealed lock tongue 8 is prevented from friction interference with the door frame 1 and the ground, the door body 2 is ensured to rapidly and smoothly rotate under the drive of the elastic pull rod or the torsional spring of the hinge shaft 39, the emergency time delayed by blocking is reduced, meanwhile, the abrasion deformation risk of the lock tongue 8 is reduced, and the maintenance frequency is reduced so as to adapt to the long-time high-load operation requirement of a monitoring station;

Thirdly, the hidden property of the structure can be enhanced, the possibility of illegal modification and damage is reduced, the transmission path of the lock tongue 8 and the core structure are wrapped by the door body 2 by the built-in design, the opportunity of observing and researching the lock structure by a person under the control of the person under the control is reduced, the external tool is prevented from directly contacting the lock tongue 8, the direct damage behavior is prevented, the integral security threshold is indirectly improved, the problems of security hole, operation blocking and easy damage in the process of opening the monitoring door are solved in a targeted manner through the synergistic effect of dynamic security protection, opening and closing efficiency guarantee and structure hidden enhancement, and reliable mechanical support is provided for a monitoring security system;

When the door body 2 is in non-contact with the door frame 1, the external gear 24 and the arc gear ring 23 are kept in non-meshing connection, and meanwhile, when the door body 2 is opened, the second torsion spring 20 at the energy storage gear 22 is fully stored by the downward movement of the gear rack 27;

when the door body 2 contacts the door frame 1, namely when the trigger rod 16 starts to contact the guide groove 14, the driven inclined surface 37 of the trigger rod 16 is attached to the guide inclined surface of the door frame 1, the trigger spring 41 is compressed through the inclined surface matching of an included angle of 45 degrees, the trigger rod 16 moves downwards, the trigger rod 16 drives the outer rack 24 to start to be meshed with the arc gear ring 23 of the unidirectional pawl 21 after moving downwards, and the limit on the energy storage gear 22 is released;

Triggering through an inclined plane with an included angle of 45 degrees to ensure closing, namely locking;

The process avoids possible omission of manual operation, is difficult to crack by the on-press personnel, and greatly reduces escape risk;

in the open state, the lock tongue 8 is hidden in the door body 2, so that potential safety hazards caused by the exposed lock tongue 8 are eliminated, for example, a person on the shelf is prevented from prying the door body 2 by the exposed lock tongue 8 and penetrating a tool to unlock, a potential escape path is structurally cut off, and the security of a prison is obviously improved;

After the arc gear ring 23 is acted by the unidirectional pawl 21, the unidirectional pawl 21 starts to lose the unidirectional limiting action on the energy storage gear 22, when the trigger rod 16 enters the positioning hole 15, the unidirectional pawl 21 completely loses the matching relation with the energy storage gear 22, under the action of the second torsion spring 20, the energy storage gear 22 is quickly reset under the action of the energy storage energy of the second torsion spring 20, and the energy storage gear 22 drives the lock to be ejected out of the door body 2 and combined with the positioning hole 15, so that the self-locking of the door body 2 and the door frame 1 is completed;

When the door body 2 needs to be opened, the handle 38 is rotated, after the handle 38 is rotated, the internal tooth bar 10 drives the first lock plate 3 to move in the direction away from the door body 2, after the internal tooth bar 10 is away from the door body 2, the second lock plate 4 is synchronously away from the door body 2, after the lock tongue 8 is completely hidden in the door body 2, the handle 38 is continuously rotated, the internal tooth bar 10 moves further under the action of the guide post 9 and the limit spring 11, and the compression spring in the elastic connecting piece 29 is compressed further;

Simultaneously, when the handle 38 continues to rotate, the unidirectional pawl 21 loses the limit function on the energy storage gear 22, so that the rack 27 and the internal tooth bar 10 can move freely;

After the handle 38 is continuously rotated, the internal tooth bar 10 drives the winding roller pair steel rope 25 to further wind up, and finally the trigger rod 16 is hidden in the door body 2, so that the trigger rod 16 loses the locking connection relation between the door body 2 and the door frame 1, and the door body 2 can be smoothly opened;

when the door body 2 is opened, the fourth tooth surface is meshed with the energy storage gear 22, and the second torsion spring 20 completes the energy storage process;

when the handle 38 is not acted by external force, under the action of a plurality of springs, the unidirectional pawl 21 is reset instantaneously and the energy storage gear 22 is limited instantaneously, so that a plurality of lock tongues 8 can be hidden in the door body 2 synchronously after the door body 2 is opened.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

1. A multi-stage gear linkage automatic locking mechanism for a prison door, comprising a door frame (1), a door body (2) hinged to the door frame (1), a first lock plate (3) and two second lock plates (4), wherein a first torsion spring (5) is provided at the hinge between the door frame (1) and the door body (2), characterized in that a handle shaft (6) is rotatably mounted on the door body (2), and an electronic locking system is provided for electronically limiting the handle shaft (6), a drive gear (7) is mounted on the handle shaft (6), and both the first lock plate (3) and the second lock plate (4) are provided with a lock tongue (8) slidably connected to the door body (2), a guide post (9) is mounted on the first lock plate (3), an internal rack (10) slidably connected to the drive gear (7) is mounted on the guide post (9), a limiting spring (11) is sleeved on the guide post (9) to limit the position of the internal rack (10), and a lock hole (12) is provided on the door frame (1) corresponding to the position of each lock tongue (8);

A synchronization system is installed on the door (2). The first lock plate (3) and the second lock plate (4) are linked by the synchronization system and move closer to or further away from the door (2) in a synchronized manner. A triggering system is installed on the top and bottom of the door (2).

The triggering system includes a guide groove (14) on the door frame (1), a positioning hole (15) on the guide groove (14), a trigger rod (16) slidably connected to the door body (2), a ratchet shaft (17) rotatably connected to the door body (2), an energy storage shaft (18) and a scroll (19). The trigger rod (16) is provided with a trigger spring (41). The energy storage shaft (18) and the ratchet shaft (17) are provided with a second torsion spring (20) at the rotatable connection between them and the door body (2). A one-way pawl (21) is installed on the ratchet shaft (17). An energy storage gear (22) that cooperates with the one-way pawl (21) is installed on the energy storage shaft (18). The energy storage gear (22) stores energy when it moves away from the door body (2) through the second lock plate (4). A locking system is provided between the one-way pawl (21) and the scroll (19).

The locking system includes an arc tooth ring (23) mounted on a one-way pawl (21), an outer rack (24) that meshes with the arc tooth ring (23) mounted at the bottom end of the trigger rod (16), a spool (19) linked with an inner rack (10), a second tooth surface and a third tooth surface respectively provided on both sides of the inner rack (10), a winding gear (40) fixedly mounted on the spool (19), the winding gear (40) meshing with the second tooth surface, a steel rope (25) wound on the spool (19), the other end of the steel rope (25) fixedly connected with the outer rack (24), the spools (19) in the two trigger systems are linked by a synchronous toothed belt, and the steel rope (25) pulls the outer rack (24) to mesh with the arc tooth ring (23) when the spool (19) is wound.

The pre-torque direction of the second torsion spring (20) on the energy storage shaft (18) is set to drive the energy storage gear (22) toward the fourth tooth surface of the meshing gear frame (27), and the pre-torque direction of the second torsion spring (20) on the ratchet shaft (17) is set to drive the one-way ratchet pawl (21) toward the meshing energy storage gear (22).

2. The automatic locking mechanism of a prison door with multi-stage gear linkage according to claim 1, characterized in that the synchronization system includes an intermediate gear (26) rotatably connected to the door body (2), a set of elastic connecting members (29) connected to each of the two second lock plates (4), a drive plate (13) connected to the other end of each of the two elastic connecting members (29), a gear frame (27) fixedly installed on each of the two drive plates (13), a first tooth surface provided on each of the two gear frames (27), the two first tooth surfaces being connected to the intermediate gear (26) in a transmission manner, the two first tooth surfaces being respectively provided on both sides of the intermediate gear (26), the second tooth surface being connected to the intermediate gear (26) in a transmission manner, the third tooth surface being meshed with the drive gear (7), and two sets of symmetrically arranged return springs (28) being installed between the first lock plate (3) and the door body (2) and between the second lock plate (4) and the door body (2).

3. The automatic locking mechanism of a prison door with multi-stage gear linkage according to claim 2, characterized in that each of the elastic connecting parts (29) includes a T-shaped pull rod installed on the drive plate (13), the T-shaped pull rod is slidably connected to the second locking plate (4), the top end of the T-shaped pull rod is provided with a convex ring edge, and an anti-compression spring is sleeved on the T-shaped pull rod at the position corresponding to the convex ring edge and the second locking plate (4).

4. The automatic locking mechanism of a prison door with multi-stage gear linkage according to claim 1, characterized in that the electronic locking system includes a central control panel (30) and an electric push rod (31) installed on the door body (2), a self-locking gear (32) is installed on the handle shaft (6), a locking plate (33) that cooperates with the self-locking gear (32) is installed on the movable end of the electric push rod (31), and an audible and visual alarm (34), a vibration sensor (35) and an audio acquisition sensor (36) are respectively installed on the door body (2), and the data terminals of the audible and visual alarm (34), the vibration sensor (35) and the audio acquisition sensor (36) and the electric control terminal of the electric push rod (31) are all connected to the central control panel (30) for data transmission.

5. The automatic locking mechanism of a prison door with multi-stage gear linkage according to claim 1, characterized in that the triggering system further includes a fourth tooth surface disposed on the gear frame (27), the fourth tooth surface meshing with the energy storage gear (22), the top end of the trigger rod (16) is fixedly provided with a driven inclined surface (37), the door frame (1) is fixedly provided with a guide inclined surface that cooperates with the driven inclined surface (37), and the angle between the driven inclined surface (37) and the guide inclined surface and the horizontal plane is 45°.

6. The automatic locking mechanism of a prison door with multi-stage gear linkage according to claim 1, characterized in that a handle (38) is installed on the shaft (6), a hinge shaft (39) is fixedly provided on the door body (2) and hinged to the door frame (1), the first torsion spring (5) is provided at the rotational connection between the hinge shaft (39) and the door frame (1), the lock tongue (8) is made of high carbon alloy steel, and the door body (2) is made of stainless steel.

7. The automatic locking mechanism of a prison door with multi-stage gear linkage according to claim 1, characterized in that a limiting ring is installed on the trigger rod (16), the trigger spring (41) is sleeved on the trigger rod (16), the two ends of the trigger spring (41) are fixedly connected to the limiting ring and the door body (2) respectively, the height of the trigger rod (16) is 1.2 times to 1.3 times the height of the guide groove (14), the guide groove (14) is an arc groove and the center of the arc of the guide groove (14) is on the axis of the hinge shaft (39).

8. The automatic locking mechanism of a prison door with multi-stage gear linkage according to claim 1, characterized in that the first torsion spring (5) and the second torsion spring (20) are both made of spring steel.