CN212927412U - Protective safety door lock - Google Patents

Abstract

The utility model discloses a protective safety door lock, which comprises a bottom plate, a lock shell, a lock plate, a pin rod, an escape handle, a lock slider, a movable handle and a lock catch seat, wherein the front end of the lock plate is provided with a lock tongue, the lock plate is connected with the escape handle through a handle fixing pin, and a baffle is fixed on the handle fixing pin; and a stop lever is fixed on the pin rod and is in butt joint with the baffle, and the stop lever is clamped at the rear side of the baffle when the door lock is in a locked state. The utility model relates to an escape structure composed of an escape handle, a baffle, a handle fixing pin, a stop lever and the like, so that when the door lock is locked, the door lock can be opened by rotating the escape handle at the inner side, but the door lock can not be locked at the inner side by rotating the escape handle, therefore, firstly, the door lock is safer and more reliable, and the potential safety hazard is eliminated; secondly, after the locking, the stop lever is not contacted with the baffle and can not be locked from the inside through the escape handle, so that the effect that the escape handle cannot be locked can be achieved without damaging the baffle.

Description

Protective safety door lock

Technical Field

The utility model relates to a tool to lock product technical field especially relates to an occasion such as mainly be applied to guardrail, rail is used for realizing safety protection function safety lock.

Background

In many fields, such as storage isolation, equipment guardrails, machine protecting nets, workshop fences and the like, a closed area is often enclosed by a net guardrail and the like, and a door is arranged on the closed area for people, equipment, materials and the like to enter and exit, and generally comprises a sliding door, a vertical hinged door, a folding door, a telescopic door and the like. For safety, it is generally necessary to install a safety door lock on a door to prevent a safety accident in which a person is trapped. Traditional safety door lock, though some have set up the handle of fleing, can realize opening in the door inside and flee, nevertheless can close the lock inside through the handle of fleing, this is not conform to the safety standard, still has the potential safety hazard. In addition, some conventional safety door locks are provided with a blocking plate inside the door lock for preventing the door lock from being locked inside, and the escape handle can be unlocked by breaking the blocking plate, but this method is troublesome to operate and is usually irreversible.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to the defect that prior art exists, provide a realize that simple structure, operation are more convenient, more safe and reliable, need not to make the protection safety door lock that the handle of fleing can not lock through destroying inner structure.

In order to solve the technical problem, the utility model adopts the following technical scheme: a protective safety door lock comprises a bottom plate, a lock shell, a lock plate, a pin rod, an escape handle, a lock sliding block, a movable handle and a lock catch seat, wherein the front end of the lock plate is provided with the lock tongue; the handle of fleing sets up in the bottom plate back in order to stretch into in the door inside, its characterized in that: a handle fixing pin which is vertical to the locking plate and can rotate is arranged on the locking plate, the escape handle is vertically and fixedly connected with the handle fixing pin, and a baffle which can synchronously rotate along with the handle fixing pin is also fixed on the handle fixing pin; a stop lever is fixed on the pin rod and is in butt joint with the baffle, and the stop lever is clamped at the rear side of the baffle when the door lock is in a locked state, so that a structure that the baffle is linked by rotating the escape handle to push the stop lever to move backwards so as to pull the pin rod and the lock plate backwards to unlock is formed; when the door lock is in an unlocking state, the baffle is in a suspended state, so that the door lock cannot be locked from the inner side by rotating the escape handle.

Furthermore, the lock tongue is of a forward and downward extending inverted L-shaped structure, three guide grooves with different positions and shapes, namely a first guide groove, a second guide groove and a third guide groove, are arranged on the lock plate, the first guide groove is arranged behind the lock tongue, the first guide groove is of a flat L-shaped structure, and the vertical groove of the first guide groove extends upwards from the rear end of the transverse groove; a fixed positioning pin is arranged in the first guide groove, the fixed positioning pin is fixedly connected with the bottom plate, the moving track of the locking plate is limited by the matching of the first guide groove and the fixed positioning pin, and when the locking plate slides to the top end of the vertical groove of the first guide groove, the locking dog extends forwards and is buckled downwards to be locked with the locking catch seat; when the locking plate slides to the front end of the transverse groove of the first guide groove, the lock bolt is withdrawn from the lock catch seat and is in an unlocking state.

Furthermore, the second guide groove is positioned at the rear upper part of the first guide groove and is formed by two straight grooves forming a bending structure, the two straight grooves are backward and downward inclined, and the inclination angle of the rear straight groove is larger than that of the front straight groove; the lowest position of the second guide groove is not lower than the highest position of the first guide groove, and the lower part of the locking slide block is connected with the locking plate through a sliding positioning pin which can slide in the second guide groove; when the sliding positioning pin slides to the foremost end of the second guide groove, the locking plate is pushed to move forwards, the front end of the locking plate rotates downwards around the fixing positioning pin to buckle the lock tongue into the lock catch seat, and when the sliding positioning pin slides to the rearmost end of the second guide groove, the front end of the locking plate is pushed to rotate upwards around the fixing positioning pin to enable the locking plate to move backwards to pull the lock tongue out of the lock catch seat.

Furthermore, a third guide groove is positioned at the tail part of the lock plate and is a straight groove parallel to the pin rod, and the handle fixing pin is arranged in the third guide groove through a pin sleeve to form a structure capable of sliding back and forth; the handle fixing pin and the sliding positioning pin are movable shafts, and the fixing positioning pin is a fixing shaft. The lock is unlocked in two modes, namely a movable handle is pulled or an escape handle is rotated in the reverse direction (hereinafter referred to as backward direction) of locking, when the movable handle is pulled to retreat, a lock sliding block retreats along with the movable handle to drive a sliding positioning pin to move from the front end to the rear end of a second guide groove, and the second guide groove is integrally of a structure which is inclined backwards and downwards, so that a lock plate can be integrally lifted upwards in the retreating process of the sliding positioning pin, a fixed positioning pin is separated from the top end of a vertical groove of a first guide groove and enters a transverse groove of the first guide groove, and a lock tongue also moves upwards to be separated from fastening of a lock catch seat; the lock plate and the pin rod are also retreated along with the continuous retreating of the movable handle and the lock sliding block until the sliding positioning pin slides into the tail end of the second guide groove, the lock tongue and the pin rod are completely retracted into the lock shell, the unlocking is realized, and the locking process through the movable handle is opposite to the locking process. When the escape handle is rotated, the door lock can drive the stop lever to move forward through the pin rod when in a locking state, so that the stop lever pushes the baffle forward until the baffle is in a stress state. The baffle can be driven to rotate backwards by the rotation of the escape handle, so that the stop lever can be pushed to retreat, the whole pin lever is driven to retreat until the stop lever completely leaves the baffle, and finally unlocking is realized. When the escape handle is unlocked, the baffle plate cannot touch the stop lever no matter how the escape handle is rotated, namely, no impact force exists, and therefore the escape handle cannot be used for locking from the inside.

Furthermore, the lock sliding block is fixed at the middle section of the pin rod through a nylon sleeve, the movable handle is fixedly connected with the lock sliding block and extends upwards from the lock shell to form a locking and unlocking structure capable of pushing the lock sliding block to move left and right, and when the movable handle is pulled, the lock sliding block and the pin rod can synchronously move left and right.

Furthermore, a fixed handle extending out in the same direction as the movable handle is fixed at the tail part of the lock shell, and the fixed handle forms a force-borrowing structure when the movable handle is operated. The existing safety lock only has one movable handle for locking and unlocking, and the locking and unlocking of the safety lock need large force, so that the force is not used everywhere when the movable handle is pulled, and the operation is inconvenient and laborious. After the fixed handle is arranged, the movable handle can be pulled by one hand to lock or unlock, and the fixed handle is held by the other hand to assist the force, so that the operation is more convenient and labor-saving.

Furthermore, a guide frame is arranged on the inner upper surface of the lock shell, the pin rod longitudinally penetrates through the whole guide frame, the lock sliding block is positioned between the guide frames, and the guide frames form a left-right moving range of the lock sliding block so as to prevent the pin rod and the lock plate from being excessively moved; the movable handle penetrates through the guide frame and then penetrates out of the lock shell.

Furthermore, a sliding plate which can move left and right along with the lock sliding block is fixed on the front surface of the lock sliding block, and a part of the sliding plate extends out of the lock shell when moving to the bottom in the unlocking direction, so that a structure for installing a safety door switch key and hanging a concentric lock is formed.

Furthermore, a limiting frame in an inverted V shape is installed at the bottom inside the lock shell, a limiting groove matched with the lock plate is formed in the limiting frame, the lock plate penetrates through the limiting groove, a stop limiting structure for the left-right moving process of the lock plate is formed through the limiting frame, and the lock plate is further prevented from being excessively moved.

Furthermore, a handle is arranged on the front surface of the upper part of the bottom plate, and the handle is suspended above the lock shell, so that the door can be conveniently closed by pulling the door.

The utility model relates to an escape structure composed of an escape handle, a baffle, a handle fixing pin, a stop lever and the like, so that when the door lock is locked, the door lock can be opened by rotating the escape handle at the inner side, but the door lock can not be locked at the inner side by rotating the escape handle, therefore, firstly, the door lock is safer and more reliable, conforms to the safety standard, and eliminates the potential safety hazard; secondly, promote the pin lever through the baffle, the pin lever of interlinkage retreats again and realizes unblanking, and the back pin lever of locking then does not contact with the baffle for can not lock from the inside through the handle of fleing, thereby need not reach the effect that can't lock through the handle of fleing through destroying the baffle, not only the operation is more convenient, but also can used repeatedly always.

Drawings

FIG. 1 is an overall structure diagram of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a structural diagram of the utility model with the bottom plate, the lock case and the guide frame removed;

FIG. 4 is an internal structure view of the present invention;

fig. 5 is an internal structure view of another aspect of the present invention.

In the figure, 1 is a bottom plate, 2 is a lock shell, 3 is a guide frame, 4 is a lock catch seat, 5 is a sliding plate, 6 is a lock plate, 61 is a lock tongue, 62 is a first guide groove, 63 is a second guide groove, 64 is a third guide groove, 7 is a baffle, 81 is a movable handle, 82 is a force-borrowing handle, 9 is an escape handle, 10 is a handle fixing pin, 11 is a nylon sleeve, 12 is a pin rod, 13 is a limiting frame, 14 is a lock sliding block, 15 is a handle, 16 is a pin sleeve, 17 is a sliding positioning pin, 18 is a fixing positioning pin, and 19 is a stop lever.

Detailed Description

The invention will be further explained by means of specific embodiments with reference to the accompanying drawings:

in this embodiment, referring to fig. 1 to 5, the protective safety door lock includes a bottom plate 1, a lock case 2, a lock plate 6, a pin rod 12, an escape handle 9, a lock slider 14, a movable handle 81, and a lock catch holder 4, where the lock plate 6 has a lock tongue 61 at the front end thereof, the lock catch holder 4 is in butt joint with the lock tongue 61 and the pin rod 12 to lock the door lock, the lock slider 14 is fixedly connected with the pin rod 12, the lock case 2 is fixed with the bottom plate 1, the pin rod 12 is inserted and fixed in the lock slider 14, the lock plate 6 is movably connected with the lock slider 14, the movable handle 81 is fixed with the lock slider 14 and extends out of the lock case 2, the pin rod 12, the lock plate 6, the movable handle 81, and the lock slider 14 form a structure capable of synchronously sliding left and right, and the lock tongue 61 of the lock plate 6 is inserted into the lock catch holder 4 together when the door lock; the escape handle 9 is arranged on the back of the bottom plate 1 to extend into the inner side of the door; a handle fixing pin 10 which is vertical to the locking plate 6 and can rotate is arranged on the locking plate 6, an escape handle 9 is vertically and fixedly connected with the handle fixing pin 10, and a baffle 7 which can synchronously rotate along with the handle fixing pin 10 is also fixed on the handle fixing pin 10; a stop lever 19 is fixed on the pin rod 12 and is in butt joint with the baffle 7, and the stop lever is clamped at the rear side of the baffle 7 when the door lock is in a locked state, so that a structure that the stop lever 19 can be pushed to move backwards by rotating the escape handle 9 to link the baffle 7 so as to pull the pin rod 12 and the lock plate 6 backwards to unlock is formed; when the door lock is in the unlocked state, the flap 7 is in a suspended state and therefore cannot be locked from the inside by rotating the escape handle 9.

The lock tongue 61 is of a forward and downward extending inverted L-shaped structure, three guide grooves with different positions and shapes, namely a first guide groove 62, a second guide groove 63 and a third guide groove 64 are arranged on the lock plate 6, wherein the first guide groove 62 is arranged behind the lock tongue 61, the first guide groove 62 is of a flat L-shaped structure, and a vertical groove of the first guide groove extends upwards from the rear end of the transverse groove; a fixed positioning pin 18 is arranged in the first guide groove 62, the fixed positioning pin 18 is connected with the bottom plate 1 to form a fixed rotating shaft, the moving track of the locking plate 6 is limited by the cooperation of the first guide groove 62 and the fixed positioning pin 18, and when the locking plate 6 slides to the top end of the vertical groove of the first guide groove 62, the locking bolt 61 extends forwards and is buckled downwards to be locked with the lock catch seat 4; when the lock plate 6 slides until the fixing pin 18 is located at the front end of the transverse groove of the first guide groove 62, the lock tongue 61 is withdrawn from the latch holder 4 in the unlocked state.

The second guide groove 63 is located at the rear upper part of the first guide groove 62 and is formed by two straight grooves forming a bending structure, the two straight grooves are backward and downward inclined, and the inclination angle of the backward straight groove is larger than that of the forward straight groove; the lowest position of the second guide groove 63 is not lower than the highest position of the first guide groove 62, and the lower part of the lock slide block 14 is connected with the lock plate 6 through a slide positioning pin 17 which can slide in the second guide groove 63; when the sliding positioning pin 17 slides to the foremost end of the second guide groove 63, the locking plate 6 is pushed to move forward, the front end of the locking plate 6 rotates downward around the fixing positioning pin 18 to buckle the bolt 61 into the buckle seat 4, and when the sliding positioning pin 17 slides to the rearmost end of the second guide groove 63, the front end of the locking plate 6 is pushed to rotate upward around the fixing positioning pin 18 to make the locking plate 6 move backward to pull the bolt 61 out of the buckle seat 4.

The third guide groove 64 is positioned at the tail part of the locking plate 6 and is a straight groove parallel to the pin rod 12, and the handle fixing pin 10 is arranged in the third guide groove 64 through a pin sleeve 16 to form a structure capable of sliding back and forth; the handle fixing pin 10 and the sliding positioning pin 17 are movable shafts, and the fixing positioning pin 18 is a fixed shaft. The lock is unlocked in two ways, namely, the movable handle 81 is pulled or the escape handle 9 is rotated in the reverse direction (hereinafter referred to as backward direction) of the lock, when the movable handle 8 is pulled to backward, the lock sliding block 14 is backward along with the backward movement, the sliding positioning pin 17 is driven to move from the front end to the rear end of the second guide groove 63, and the second guide groove 63 is overall in a backward and downward inclined structure, so that the lock plate 6 can be integrally lifted upwards in the backward movement process of the sliding positioning pin 17, the fixed positioning pin 18 is separated from the top end of the vertical groove of the first guide groove 62 and enters the transverse groove of the first guide groove 62, and the lock tongue 61 also moves upwards to be separated from the fastening of the lock catch seat 4; as the movable handle 81 and the lock slider 14 continue to retreat, the lock plate 6 and the pin rod 12 also retreat until the slide positioning pin 17 slides into the tail end of the second guiding groove 63, and the lock tongue 61 and the pin rod 12 are completely retracted into the lock case 2, so that the lock is unlocked, and the process of locking through the movable handle 81 is reversed. When the escape handle 9 is rotated, the door lock in the locked state drives the stop lever 19 to move forward through the pin rod 12, so that the stop lever 19 pushes the baffle 7 forward until the baffle 7 is in a stressed state. The baffle 7 is driven to rotate backwards by the rotation of the escape handle 9, so that the stop lever 19 is pushed to retreat, the whole pin rod 12 is driven to retreat until the stop lever 19 completely leaves the baffle 7, and finally unlocking is realized. When the escape handle 9 is rotated in the unlocked state, the flap 7 does not touch the stop lever 19, i.e., no force is applied, and thus the escape handle 9 cannot be locked from the inside.

The lock sliding block 14 is fixed at the middle section of the pin rod 12 through a nylon sleeve 11, the movable handle 81 is fixedly connected with the lock sliding block 14 and extends upwards from the lock shell 2 to form a locking and unlocking structure capable of pushing the lock sliding block 14 to move left and right, and when the movable handle 81 is pulled, the lock sliding block 14 and the pin rod 12 can synchronously move left and right.

A fixed handle 82 extending in the same direction as the movable handle 81 is fixed at the tail part of the lock shell 2, and the fixed handle 82 forms a force-assisting structure when the movable handle 81 is operated. The existing safety lock only has one movable handle for locking and unlocking, and the locking and unlocking of the safety lock need large force, so that the force is not used everywhere when the movable handle is pulled, and the operation is inconvenient and laborious. After the fixed handle 82 is arranged, the movable handle 81 can be pulled by one hand to lock or unlock, and the fixed handle 82 can be held by the other hand to assist the force, so that the operation is more convenient and labor-saving.

The guide frame 3 is arranged on the inner upper surface of the lock shell 2, the pin rod 12 longitudinally penetrates through the whole guide frame 3, the lock sliding block 14 is positioned between the guide frames 3, and the guide frame 3 forms a left-right moving range of the lock sliding block 14 to prevent the pin rod 12 and the lock plate 6 from being excessively moved; the movable handle 81 passes through the guide frame 3 and then passes out of the lock case 2.

A sliding plate 5 which can move left and right along with the lock sliding block 14 is fixed on the front surface of the lock sliding block 14, and a part of the sliding plate 5 extends out of the lock shell 2 when moving to the bottom in the unlocking direction, thereby forming a structure for installing a safety door switch key and hanging a concentric lock.

The bottom in the lock shell 2 is provided with an inverted V-shaped limiting frame 13, the limiting frame 13 is provided with a limiting groove matched with the lock plate 6, the lock plate 6 penetrates through the limiting groove, and a stop limiting structure for the left-right movement process of the lock plate 6 is formed through the limiting frame 13, so that the lock plate 6 is further prevented from being moved excessively.

A handle 15 is arranged on the upper front surface of the bottom plate 1, and the handle 15 is suspended above the lock shell 2, so that the door can be conveniently closed by pulling the door.

The above detailed description of the present invention is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereto, i.e. all equivalent changes and modifications made in accordance with the scope of the present invention should be covered by the present invention.

Claims (10)

1. A protective safety door lock comprises a bottom plate, a lock shell, a lock plate, a pin rod, an escape handle, a lock sliding block, a movable handle and a lock catch seat, wherein the front end of the lock plate is provided with the lock tongue; the handle of fleing sets up in the bottom plate back in order to stretch into in the door inside, its characterized in that: a handle fixing pin which is vertical to the locking plate and can rotate is arranged on the locking plate, the escape handle is vertically and fixedly connected with the handle fixing pin, and a baffle which can synchronously rotate along with the handle fixing pin is also fixed on the handle fixing pin; a stop lever is fixed on the pin rod and is in butt joint with the baffle, and the stop lever is clamped at the rear side of the baffle when the door lock is in a locked state, so that a structure that the baffle is linked by rotating the escape handle to push the stop lever to move backwards so as to pull the pin rod and the lock plate backwards to unlock is formed; when the door lock is in an unlocking state, the baffle is in a suspended state.

2. The secure door lock of claim 1, wherein: the lock bolt is of a forward and downward extending inverted L-shaped structure, three guide grooves with different positions and shapes, namely a first guide groove, a second guide groove and a third guide groove, are arranged on the lock plate, the first guide groove is arranged behind the lock bolt, the first guide groove is of a flat L-shaped structure, and a vertical groove of the first guide groove extends upwards from the rear end of the transverse groove; a fixed positioning pin is arranged in the first guide groove, the fixed positioning pin is fixedly connected with the bottom plate, the moving track of the locking plate is limited by the matching of the first guide groove and the fixed positioning pin, and when the locking plate slides to the top end of the vertical groove of the first guide groove, the locking dog extends forwards and is buckled downwards to be locked with the locking catch seat; when the locking plate slides to the front end of the transverse groove of the first guide groove, the lock bolt is withdrawn from the lock catch seat and is in an unlocking state.

3. The secure door lock of claim 2, wherein: the second guide groove is positioned at the rear upper part of the first guide groove and is formed by two straight grooves forming a bending structure, the two straight grooves are backward and downward inclined, and the inclination angle of the straight groove at the rear section is larger than that of the straight groove at the front section; the lowest position of the second guide groove is not lower than the highest position of the first guide groove, and the lower part of the locking slide block is connected with the locking plate through a sliding positioning pin which can slide in the second guide groove; when the sliding positioning pin slides to the foremost end of the second guide groove, the locking plate is pushed to move forwards, the front end of the locking plate rotates downwards around the fixing positioning pin to buckle the lock tongue into the lock catch seat, and when the sliding positioning pin slides to the rearmost end of the second guide groove, the front end of the locking plate is pushed to rotate upwards around the fixing positioning pin to enable the locking plate to move backwards to pull the lock tongue out of the lock catch seat.

4. The secure door lock of claim 3, wherein: the third guide groove is positioned at the tail part of the lock plate and is a straight groove parallel to the pin rod, and the handle fixing pin is arranged in the third guide groove through a pin sleeve to form a structure capable of sliding back and forth; the handle fixing pin and the sliding positioning pin are movable shafts, and the fixing positioning pin is a fixing shaft.

5. The secure door lock of claim 1, wherein: the lock sliding block is fixed at the middle section of the pin rod through a nylon sleeve, and the movable handle is fixedly connected with the lock sliding block and extends upwards from the lock shell to form a locking and unlocking structure capable of pushing the lock sliding block to move left and right.

6. The secure door lock of claim 1, wherein: the tail part of the lock shell is also fixed with a fixed handle which extends out in the same direction with the movable handle, and the fixed handle forms a force-borrowing structure when the movable handle is operated.

7. The secure door lock of claim 1, wherein: the upper surface of the inside of the lock shell is provided with a guide frame, a pin rod longitudinally penetrates through the whole guide frame, a lock sliding block is positioned between the guide frames, and the guide frames form the left and right moving range of the lock sliding block; the movable handle penetrates through the guide frame and then penetrates out of the lock shell.

8. The secure door lock of claim 1, wherein: the front of the lock sliding block is fixed with a sliding plate which can move left and right along with the lock sliding block, and when the sliding plate moves to the bottom in the unlocking direction, a part of the sliding plate extends out of the lock shell to form a structure for installing a safety door switch key and hanging a concentric lock.

9. The secure door lock of claim 1, wherein: the bottom in the lock shell is provided with an inverted V-shaped limiting frame, a limiting groove matched with the lock plate is formed in the limiting frame, the lock plate penetrates through the limiting groove, and a stop limiting structure for the left-right moving process of the lock plate is formed through the limiting frame.

10. The secure door lock of claim 1, wherein: the front surface of the upper part of the bottom plate is provided with a handle which is suspended above the lock shell.

Images