CN216690648U - Escape door lock - Google Patents

Abstract

The utility model discloses an escape door lock, comprising: the lock comprises a lock shell, an inclined bolt and a square bolt, and is characterized in that a sliding block is arranged on the lock shell, the sliding block is connected to the lock shell in a sliding manner, a driving groove is formed in the sliding block, a movable driving plate is connected in the driving groove, a positioning groove is formed in the lock shell, a limiting plate is arranged in the center of the positioning groove, and a locking groove and an unlocking groove which are matched with the driving plate are formed in two sides of the limiting plate; handle components, including the inside cover, the outside cover, spacer and square tongue unlocking sheet, the inside cover, outside cover and square tongue unlocking sheet all rotate to be connected in the lock shell, the inside cover, the outside cover can drive the slide bar withdrawal, interior side cover fixed connection is in the spacer, the spacer is equipped with first baffle, the periphery that the square tongue unlocking sheet was equipped with the second baffle, first baffle can the butt second baffle, the square tongue unlocking sheet still is equipped with the unblock flange, the drive flange, the unblock flange can the butt drive plate remove in order to promote the drive plate, the slider is equipped with the boss, drive flange butt boss removes the lockgroove from locking the groove with promoting the drive plate, drive square tongue withdrawal.

Description

Escape door lock

Technical Field

The utility model relates to the technical field of hardware locks, in particular to an escape door lock.

Background

The common escape door lock is mainly used for emergency exit access doors in public places with large people flow, such as large supermarkets, shopping malls, office buildings, hospitals, schools, factory buildings and the like, can be unlocked by a door handle on one side inside the door or a key, cannot be unlocked by the door handle on one side outside the door, and a user can conveniently open the door from one side inside the door under emergency.

In order to realize quick unlocking, most of the common escape door locks are provided with channel locks (single-tongue locks) and cannot be locked, and the escape door locks without anti-theft functions are unlocked.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the escape door lock provided by the utility model has an anti-theft function under the condition that the function of conveniently opening the escape door is reserved.

An escape door lock according to an embodiment of the present invention includes: a lock case; the inclined bolt is connected to the sliding rod, and the sliding rod is connected to the lock shell in a sliding mode so as to drive the inclined bolt to extend out or retract; the square spring bolt is provided with a sliding block, the sliding block is connected to the lock shell in a sliding mode, the sliding block is provided with a driving groove, a movable driving plate is connected into the driving groove, the lock shell is provided with a positioning groove, a limiting plate is arranged in the center of the positioning groove, and a locking groove and an unlocking groove which are matched with the driving plate are formed in two sides of the limiting plate; handle components, including interior side cover, outside cover, spacer and square tongue unlocking sheet, the inside cover the outside cover and the square tongue unlocking sheet all rotate connect in the lock shell, the inside cover the outside cover all is equipped with oblique tongue plectrum, in order to drive the slide bar withdrawal, inside cover fixed connection in the spacer, the spacer is equipped with first baffle, the square tongue unlocking sheet's periphery is equipped with the second baffle, first baffle can the butt the second baffle, the square tongue unlocking sheet still is equipped with unblock flange, drive flange, unblock flange can the butt the drive plate is in order to promote the drive plate removes, the slider is equipped with the boss, the drive flange butt the boss is in order to promote the slider removes, and then drives the drive plate by go up the locked groove and remove the unlocked groove.

According to the utility model name of the embodiment of the utility model, the beneficial effects are as follows: when a user closes the door, the inclined bolt impacts the door frame, the inclined surface of the inclined bolt is driven by the sliding sheet of the inclined bolt to retract into the lock shell instantly under the action of the pressure of the door frame, and the inclined bolt extends out to realize locking when reaching the position of the lock slot. The square bolt can strengthen the anti-theft and anti-prying functions. After the square spring bolt locks, when the user need flee through the emergency exit under emergency, from indoor rotation inside square cover, the inside square cover drives oblique spring bolt withdrawal to drive central spacer and rotate, first baffle butt second baffle drives square spring bolt unblock piece and rotates, and the unblock lug promotes the drive plate and leaves the locked groove, and drive lug butt boss promotes the drive plate and removes to the unlocked groove, realizes that square spring bolt and oblique spring bolt retract simultaneously, has guaranteed the convenient function of the lock of fleing the lock door of opening the door. But the outer square sleeve can only drive the inclined lock tongue to retract after rotating from the outside of the door, and the square lock tongue cannot be driven to retract, so that the anti-theft capacity of the escape door is improved, and the use experience of a user is further improved.

According to some embodiments of the utility model, a double torsion spring is fixedly connected to both sides of the slider, and the double torsion spring is fixedly mounted to the lock case.

According to some embodiments of the utility model, the lock case is slidably connected with a safety slide sheet, the safety slide sheet is fixedly connected with a safety latch bolt, when the door is closed, the safety latch bolt abuts against a buckle plate, the buckle plate is installed on a door frame, the buckle plate is provided with a latch bolt lock groove and a square bolt lock groove, the safety slide sheet is provided with a latch bolt, the lock case is connected with a movable latch bolt self-locking plate, the latch bolt self-locking plate is provided with a convex plate, the convex plate abuts against the latch bolt, the latch bolt self-locking plate is connected with a positioning spring, the positioning spring is fixed on the lock case, when the safety latch bolt retracts, the safety slide sheet slides towards the lock case, the latch bolt deviates from the convex plate, and the latch bolt self-locking plate abuts against the latch bolt.

According to some embodiments of the utility model, a safety guide plate is fixedly connected to the lock case, the safety guide plate is provided with a safety guide groove, the safety slide plate is clamped into the safety guide groove, the safety guide groove is connected with one end of a safety reset spring, and the other end of the safety reset spring is connected to the safety latch bolt.

According to some embodiments of the present invention, the sliding rod is fixedly connected with a latch bolt driving plate, the latch bolt driving plate has a first side plate and a second side plate, the latch bolt shifting piece abuts against the second side plate, and when the latch bolt shifting piece drives the latch bolt to retract, the first side plate abuts against the latch bolt self-locking plate to drive the latch bolt self-locking plate to leave the latch bolt.

According to some embodiments of the utility model, the lock case is fixedly connected with a latch bolt guide sheet, the latch bolt guide sheet is provided with a latch bolt guide groove, the slide rod is clamped into the latch bolt guide groove, the latch bolt and the first side plate are connected with a latch bolt return spring, and a slide rod return spring is connected between the first side plate and the latch bolt guide sheet.

According to some embodiments of the utility model, a baffle is arranged at the tail end of the sliding rod, and the second side plate and the baffle are connected with a square set of return springs.

According to some embodiments of the utility model, the lock shell is rotatably connected with a lock cylinder, the lock cylinder is fixedly connected with a shifting piece, and the shifting piece can abut against the driving plate and the groove wall of the driving groove to drive the square bolt to extend or retract.

According to some embodiments of the utility model, the sliding block is rotatably connected with an oblique bolt driving piece, one end of the oblique bolt driving piece is abutted against the first side plate, and the shifting piece can be abutted against the oblique bolt driving piece to drive the oblique bolt to retract.

According to some embodiments of the utility model, the slider is provided with a square tongue guide groove, the lock case is fixedly connected with a square tongue guide rail, and the square tongue guide rail is clamped in the square tongue guide groove to limit the sliding direction of the square tongue.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the following figures and examples, in which:

FIG. 1 is a sectional view of an escape door lock according to an embodiment of the present invention;

FIG. 2 is a three-dimensional view of an escape door lock according to an embodiment of the present invention in another orientation;

FIG. 3 is a cross-sectional view taken along the line A-A shown in FIG. 2;

fig. 4 is a burst view of an escape door according to an embodiment of the present invention.

Reference numerals are as follows: the lock comprises a lock shell 100, an oblique bolt 110, a sliding rod 111, an oblique bolt self-locking plate 112, a first side plate 113, a second side plate 114, a baffle plate 115, a positioning spring 116, a square bolt 120, a sliding block 121, a driving plate 122, a driving groove 123, a boss 124, a double torsion spring 125, a safety oblique bolt 130, a safety slide plate 131, a safety return spring 132, a safety guide plate 133, an oblique bolt driving plate 140, a handle assembly 200, an inner square sleeve 210, an outer square sleeve 220, a spacer 230, a first baffle plate 231, a square bolt unlocking plate 240, a second baffle plate 241, an unlocking convex plate 242, a driving convex plate 243, an oblique bolt shifting plate 250, a positioning groove 300, a limiting plate 310, an unlocking groove 320, an upper locking groove 330, a lock core 400 and a shifting plate 410.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, 2 and 3, the escape door lock disclosed by the utility model comprises a lock case 100, an inclined bolt 110, wherein the inclined bolt 110 is connected to a sliding rod 111, and the sliding rod 111 is slidably connected to the lock case 100 to drive the inclined bolt 110 to extend or retract. It can be understood that, when the user closes the door, the inclined bolt 110 strikes the door frame, and the inclined surface of the inclined bolt 110 is pressed by the door frame, and is instantaneously retracted into the lock case 100 under the driving of the inclined bolt sliding piece, and extends out to achieve the basic locking function when reaching the lock slot position. The escape door lock further comprises a square bolt 120, the square bolt 120 is provided with a sliding block 121, the sliding block 121 is connected to the lock shell 100 in a sliding mode, and the square bolt 120 can further improve the anti-theft function of the escape door lock. The slider 121 is provided with a driving groove 123, a movable driving plate 122 is connected to the driving groove 123, the lock case 100 is provided with a positioning groove 300, a limiting plate 310 is arranged at the center of the positioning groove 300, and a locking groove 330 and a locking groove 320 matched with the driving plate 122 are formed on two sides of the limiting plate 310. Specifically, when the driving plate 122 abuts against the wall of the driving groove 123 and is located in the upper locking groove 330, the driving plate 122 moves to the unlocking groove 320 and drives the sliding block 121 to retract, thereby driving the square bolt 120 to retract.

Specifically, the escape door lock further comprises a handle assembly 200, the handle assembly 200 comprises an inner square sleeve 210, an outer square sleeve 220, a spacer 230 and a square tongue unlocking piece 240, the inner square sleeve 210, the outer square sleeve 220 and the square tongue unlocking piece 240 are all rotatably connected to the lock shell 100, and the inner square sleeve 210 and the outer square sleeve 220 are both provided with an oblique tongue shifting piece 250 to drive the sliding rod 111 to retract. It is understood that the sliding rod 111 retracts to retract the latch bolt 110, and the user can unlock the latch bolt 110 by rotating the inner sleeve 210 or the outer sleeve 220 either inside or outside the door. The inner sleeve 210 is fixedly connected to the spacer 230, so that a user can open the door from the door and the spacer 230 can be driven to rotate when the inner sleeve 210 rotates. The spacer 230 is provided with a first baffle 231, the periphery of the dead bolt unlocking sheet 240 is provided with a second baffle 241, and when the spacer 230 rotates, the first baffle 231 can abut against the second baffle 241, so as to push the dead bolt unlocking sheet 240 to rotate. The dead bolt unlocking sheet 240 is further provided with an unlocking convex plate 242 and a driving convex plate 243, when the dead bolt unlocking sheet 240 rotates, the unlocking convex plate 242 can abut against the driving plate 122 and pushes the driving plate 122 to move, it can be understood that the limiting plate 310 loses the limiting effect on the driving plate 122 at the moment, and the driving plate 122 abuts against the top surface of the limiting plate 310 and can move along the direction of the positioning groove 300. The slider 121 is provided with a boss 124, and the driving plate 243 abuts against the boss 124 and pushes the slider 121 to move integrally, thereby driving the driving plate 122 to move from the upper locking slot 330 to the unlocking slot 320.

It can be understood that, when a user needs to escape through the escape door in an emergency, the inner square sleeve 210 is rotated from the indoor, so that the square bolt 120 and the inclined bolt 110 retract simultaneously, and the function of opening the door of the escape door lock is ensured to be convenient. However, the outer square sleeve 220 can only drive the inclined bolt 110 to retract when being rotated from the outside of the door, and cannot drive the square bolt 120 to retract, so that the anti-theft capability of the escape door is improved, and the use experience of a user is further improved.

Referring to fig. 2 and 4, a double torsion spring 125 is fixedly connected to both sides of the slider 121, and the double torsion spring 125 is fixedly installed on the lock case 100. It should be noted that, when the square bolt 120 is in the extended state, the driving plate 122 is located in the upper lock slot 330, and the double torsion springs 125 at both sides of the sliding block 121 are elastically deformed to apply an elastic force to the sliding block 121 in the direction toward the inside of the lock case 100. When the square bolt 120 retracts, the driving plate 122 moves towards the unlocking slot 320, and the slider 121 is pushed to move by the elastic force applied to the slider 121 by the double torsion spring 125, so that the square bolt 120 retracts more quickly. When the user rotates the inner square sleeve 210 to retract the inclined bolt 110 and the square bolt 120, the unlocking speed is faster, which is beneficial to the use of the escape door by the user in an emergency state. Alternatively, the limit plate 310 may be configured as a limit swash plate having a front slope inclined downward toward the upper locking groove 330 and a rear slope inclined downward toward the unlocking groove 320. It can be understood that when the user rotates the inner square sleeve 210, the spacer 230 drives the square bolt unlocking sheet 240 to rotate, the unlocking convex plate 242 and the driving convex plate 243 drive the driving plate 122 and the sliding block 121 to move, and when the driving plate 122 moves to the highest point of the connection of the front inclined surface and the rear inclined surface of the limiting inclined plate, the elastic force of the double torsion spring 125 is matched with the guide of the rear inclined surface, so that the retraction speed of the square bolt 120 can be further increased, and the use experience of the user is optimized.

Referring to fig. 1, a safety slide piece 131 is slidably connected to a lock case 100, a safety latch bolt 130 is fixedly connected to the safety slide piece 131, when the door is closed, the safety latch bolt 130 abuts against a buckle plate, the buckle plate is installed on a door frame, and the buckle plate is provided with a latch bolt lock groove and a square bolt lock groove. It will be appreciated that when the door is closed, the angled bolt 110 snaps into the angled bolt lock slot, the square bolt 120 snaps into the square bolt lock slot, and the safety bolt 130 abuts the striker plate and retracts into the housing 100 under the pressure of the striker plate. The safety slide sheet 131 is provided with an inclined pressing plate, the lock case 100 is connected with a movable inclined tongue self-locking plate 112, the inclined tongue self-locking plate 112 is provided with a convex plate, the convex plate abuts against the inclined pressing plate, the inclined tongue self-locking plate 112 is connected with a positioning spring 116, the positioning spring 116 is fixed on the lock case 100, specifically, the elastic force of the positioning spring 116 forms a pulling force on the inclined tongue self-locking plate 112 to drive the inclined tongue self-locking plate 112 to abut against the inclined locking plate 110, and when the safety inclined tongue 130 is in an extending state, the inclined pressing plate abuts against the inclined tongue self-locking plate 112 and drives the inclined tongue self-locking plate 112 to separate from the inclined locking plate 110.

It should be noted that, when the door is opened, the safety latch bolt 130 is in an extended state, and the latch bolt 110 can be retracted. When the door is closed, the safety latch bolt 130 retracts into the lock case 100 under the action of the door frame, the inclined pressing plate leaves the convex plate, the latch bolt self-locking plate 112 abuts against the latch bolt 110 under the tension of the positioning spring 116, and at the moment, the latch bolt 110 cannot retract into the lock case 100. The anti-prying function of the inclined bolt 110 is improved, the anti-theft effect of the escape door lock is optimized, and the use experience of a user is improved.

Referring to fig. 1 and 4, a safety guide piece 133 is fixedly connected to the lock case 100, the safety guide piece 133 is provided with a safety guide groove, and the safety slide piece 131 is clamped into the safety guide groove to limit the sliding direction of the safety slide piece 131, so that the safety latch 130 can only extend or retract in a linear motion. The safety guide slot is connected with one end of a safety reset spring 132, and the other end of the safety reset spring 132 is connected with the safety latch bolt 130, it can be understood that the safety latch bolt 130 is pressed by the buckle plate to retract into the lock case 100, the safety latch bolt 130 presses the safety reset spring 132 to generate elastic deformation, the safety reset spring 132 generates elastic force to the safety latch bolt 130, when the door is opened, the safety latch bolt 130 loses the pressure of the buckle plate, and is pushed by the elastic force of the safety reset spring 132 to extend out of the lock case 100. The user does not need to manually or additionally set a reset mechanism to drive the safety latch bolt 130 to extend, so that the latch bolt 110 is unlocked, and the use by the user is facilitated.

Referring to fig. 1 and 4, the sliding rod 111 is fixedly connected with a latch bolt driving plate 122, the latch bolt driving plate 122 has a first side plate 113 and a second side plate 114, a latch bolt shifting piece 250 abuts against the second side plate 114, when a user rotates the inner square sleeve 210 or the outer square sleeve 220, the latch bolt shifting piece 250 is driven to rotate, the latch bolt shifting piece 250 applies a pushing force to the second side plate 114, and then the sliding rod 111 connected with the latch bolt 110 is driven to retract, so as to realize unlocking. The first side plate 113 abuts against the latch bolt self-locking plate 112, and when the user rotates the inner square sleeve 210 and the outer square sleeve 220 to drive the sliding rod 111 to retract, the first side plate 113 moves along with the sliding rod 111 to push the latch bolt self-locking plate 112 to leave the latch bolt 110. It can be understood that when a user opens the door, the oblique bolt 110 is not resisted by the oblique bolt self-locking plate 112, but it is very difficult to directly pry the oblique bolt 110 to retract into the lock case 100 by using an appliance, so that the normal use of the user is not influenced while the prying-resistant function is enhanced, and the use experience of the user is improved.

Referring to fig. 1, a latch bolt guide plate is fixedly connected to a lock case 100, the latch bolt guide plate is provided with a latch bolt guide groove, and a slide rod 111 is clamped into the latch bolt guide groove to limit the latch bolt 110 to extend out or retract in a linear motion, so that the probability of damage caused by slipping of the latch bolt 110 is reduced, and the maintenance and replacement costs are reduced. The latch bolt 110 and the first side plate 113 are connected with a latch bolt return spring, and a slide rod 111 return spring is connected between the first side plate 113 and the latch bolt guide piece. When a user opens the door or the inclined bolt 110 is pressed by striking a door frame by rotating the inner square sleeve 210 or the outer square sleeve 220, and the inclined bolt 110 retracts into the lock shell 100, the inclined bolt reset spring and the slide rod 111 reset spring are compressed by pressure and generate elastic deformation to generate elastic force, after the user loosens the inner square sleeve 210 or the outer square sleeve 220 or the door frame and does not generate pressure on the inclined bolt 110 any more, the inclined bolt reset spring and the elastic force of the slide rod 111 reset spring push the inclined bolt 110 to extend out of the lock shell 100, the user does not need to manually or additionally arrange a mechanism to push the inclined bolt, the structure is simplified, and the use experience of the user is improved.

Referring to fig. 1, a stop plate 115 is disposed at the rear end of the sliding rod 111, and a square set of return springs are connected to the second side plate 114 and the stop plate 115. It can be understood that when the user rotates the inner square sleeve 210 or the outer square sleeve 220, the latch lifting tab 250 abuts against the second side plate 114 and pushes the second side plate 114 to move, the square sleeve return spring is elastically deformed by pressure and generates elastic force on the second side plate 114, when the user loosens the inner square sleeve 210 or the outer square sleeve 220, the elastic force of the square sleeve return spring pushes the second side plate 114 to move and reset, and then the latch lifting tab 250 is driven to move, and the inner square sleeve 210 or the outer square sleeve 220 rotated by the user is also driven to move and reset. The user does not need to receive reset, and the use experience of the user is improved.

Referring to fig. 1 and 3, lock shell 100 is rotatably connected with lock core 400, lock core 400 is fixedly connected with plectrum 410, plectrum 410 can butt the cell wall of drive plate 122 and drive groove 123, it should be noted that, when lock core 400 rotates, plectrum 410 can butt drive plate 122 in order to promote drive plate 122 to move to the top of limiting plate 310, limiting plate 310 loses the limiting effect to drive plate 122, plectrum 410 again butt drive groove 123's cell wall to promote drive plate 122 to move to unlock groove 320 or move to lock groove 330 by unlock groove 320 by lock groove 330, and then realize driving square lock tongue 120 and stretch out or retract. The user can control the second square bolt 130 through the key to realize locking and unlocking, so that the selection of the user is optimized, and the use experience of the user is improved.

Optionally, the sliding block 121 is rotatably connected with a latch bolt driving plate 140, one end of the latch bolt driving plate 140 abuts against the first side plate 113, and the shifting piece 410 can abut against the latch bolt driving plate 140 to drive the latch bolt 110 to retract. When the lock core 400 rotates, the poking piece 410 abuts against the latch bolt driving piece 140 to rotate, so that the first side plate 113 is driven to move, the first side plate 113 is fixedly connected to the sliding rod 111, and it can be understood that a user can rotate the lock core 400 through a key to unlock the latch bolts 110, so that the user can unlock all the latch bolts of the escape door lock through the key, the unlocking steps of the user are reduced, and the use experience of the user is optimized.

Optionally, the sliding block 121 is provided with a dead bolt guide groove, the lock case 100 is fixedly connected with a dead bolt guide rail, the dead bolt guide rail is clamped in the dead bolt guide groove, and when the dead bolt 120 slides, the dead bolt guide rail is tightly attached to the side wall of the dead bolt guide groove to limit the dead bolt 120 to slide along a straight line. Further, the sliding block 121 may be provided with a guide shaft, the lock case 100 may be provided with a guide groove, the guide shaft is tightly attached to a groove wall of the guide groove, and the direction of the shake and slide of the square bolt 120 may also be limited, thereby reducing the probability of the slip of the square bolt 120 and reducing the maintenance and replacement costs.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. An escape door lock, comprising:

a lock case;

the inclined bolt is connected to the sliding rod, and the sliding rod is connected to the lock shell in a sliding mode so as to drive the inclined bolt to extend out or retract;

the square spring bolt is provided with a sliding block, the sliding block is connected to the lock shell in a sliding mode, the sliding block is provided with a driving groove, a movable driving plate is connected into the driving groove, the lock shell is provided with a positioning groove, a limiting plate is arranged in the center of the positioning groove, and a locking groove and an unlocking groove which are matched with the driving plate are formed in two sides of the limiting plate;

handle components, including interior side cover, outside cover, spacer and square tongue unlocking sheet, the inside cover the outside cover and the square tongue unlocking sheet all rotate connect in the lock shell, the inside cover the outside cover all is equipped with oblique tongue plectrum, in order to drive the slide bar withdrawal, inside cover fixed connection the spacer, the spacer is equipped with first baffle, the periphery that the square tongue unlocking sheet was equipped with second baffle, unblock flange and drive flange, first baffle can the butt the second baffle, institute the unblock flange can the butt the drive plate is in order to promote the drive plate removes, the slider is equipped with the boss, drive flange butt the boss is in order to promote the slider removes.

2. The escape door lock of claim 1, wherein a double torsion spring is fixedly connected to both sides of the slider, and the double torsion spring is fixedly mounted on the lock case.

3. The escape door lock according to claim 1, wherein the lock case is slidably connected with a safety slide sheet, the safety slide sheet is fixedly connected with a safety latch bolt, when the door is closed, the safety latch bolt abuts against a buckle plate on the door frame, the buckle plate is provided with a latch bolt lock groove and a dead bolt lock groove, the safety slide sheet is provided with a latch plate, the lock case is connected with a movable latch bolt self-locking plate, the latch bolt self-locking plate is provided with a convex plate, the convex plate abuts against the latch plate, the latch bolt self-locking plate is connected with a positioning spring, the positioning spring is fixed on the lock case, when the safety latch bolt retracts, the safety slide sheet slides and deviates from the convex plate, and the latch bolt self-locking plate abuts against the latch bolt under the action of the positioning spring.

4. The escape door lock according to claim 3, wherein a safety guide plate is fixedly connected to the lock housing, the safety guide plate is provided with a safety guide groove, the safety slide plate is clamped into the safety guide groove, the safety guide groove is connected with one end of a safety reset spring, and the other end of the safety reset spring is connected to the safety latch bolt.

5. The escape door lock according to claim 3, wherein the slide bar is fixedly connected with a latch bolt driving plate, the latch bolt driving plate is provided with a first side plate and a second side plate, the latch bolt shifting piece abuts against the second side plate, and when the latch bolt shifting piece drives the latch bolt to retract, the first side plate abuts against the latch bolt self-locking plate so as to drive the latch bolt self-locking piece to leave the latch bolt.

6. The escape door lock according to claim 5, wherein a latch bolt guide piece is fixedly connected to the lock case, the latch bolt guide piece is provided with a latch bolt guide groove, the slide rod is clamped into the latch bolt guide groove, the latch bolt and the first side plate are connected with a latch bolt reset spring, and a slide rod reset spring is connected between the first side plate and the latch bolt guide piece.

7. The escape door lock according to claim 5, wherein a baffle is provided at the tail end of the sliding rod, and a square set of return spring is provided between the second side plate and the baffle.

8. The escape door lock of claim 5 wherein the lock housing is connected to a lock cylinder, the lock cylinder having a pick, the pick being capable of abutting against the drive plate and a wall of the drive slot to drive the square bolt to extend or retract.

9. The escape door lock according to claim 8, wherein the sliding block is rotatably connected with a latch bolt driving piece, one end of the latch bolt driving piece is abutted against the first side plate, and the shifting piece can be abutted against the latch bolt driving piece to drive the latch bolt to retract.

10. The escape door lock of claim 1 wherein the slider is provided with a dead bolt guide slot, the lock housing is fixedly connected with a dead bolt guide rail, and the dead bolt guide rail is clamped in the dead bolt guide slot to limit the sliding direction of the dead bolt.

Images