Locking mechanism of safety door guardrail

Abstract

The utility model discloses a locking mechanism of a safety door guardrail, which comprises a first lock component, a second lock component and a lock groove, the first lock component and the second lock component are arranged on an upper frame of an inner door of the door guardrail, the lock groove is arranged on an outer frame of the door guardrail, and the first lock component is provided with a first movable locking piece which can extend into the lock groove to lock or retreat from the lock groove to unlock. The second lock assembly is provided with a second movable locking piece which can interfere with the first lock assembly, the first movable locking piece and the second movable locking piece are each provided with a locking position and an unlocking position, and when the second movable locking piece is located at the locking position, the first lock assembly is prevented from being operated to be unlocked. And when the second movable locking piece is located at the unlocking position, one lock assembly is allowed to be operated for unlocking. According to the utility model, the one-way lock assembly and the two-way lock assembly are adopted, and the one-way lock assembly can be operated only when the two-way lock assembly is in an unlocking state, so that the first movable locking piece is separated from the lock groove for unlocking, and therefore, misoperation of children can be reduced, and the safety and the practicability of the door guardrail are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a locking mechanism of safety door guard rail. BACKGROUND

[0002] The safety door guard rail is generally arranged at the stairway and the public environment needing to limit the exit to ensure that the children are in a relatively safe environment, but the existing door guard rail usually only sets a locking mechanism, and the children can easily open the inner door and be in the dangerous environment. CONTENT

[0003] The utility model discloses a locking mechanism of safety door guard rail which is simple in structure, low in cost and high in safety.

[0004] The utility model discloses a locking mechanism of safety door guard rail, which is characterized by comprising a one-way lock assembly, a two-way lock assembly arranged on the upper frame of the inner door of the door guard rail and a lock slot arranged on the outer frame of the door guard rail.

[0005] The utility model discloses a one-way lock assembly and a two-way lock assembly, and the one-way lock assembly can be operated to make the first movable locking piece out of the lock slot to unlock only when the two-way lock assembly is in the unlocked state.

[0006] The utility model discloses a one-way lock assembly, a two-way lock assembly and a lock slot, and the one-way lock assembly can be operated to make the first movable locking piece out of the lock slot to unlock only when the two-way lock assembly is in the unlocked state.

[0007] The utility model discloses a one-way lock assembly, a two-way lock assembly and a lock slot, and the one-way lock assembly can be operated to make the first movable locking piece out of the lock slot to unlock only when the two-way lock assembly is in the unlocked state.

[0008] The first connecting rod is composed of two parallel rods, one end of the two rods is connected by a sliding shaft, an elongated sliding hole is arranged on the rod end of the rod, the sliding shaft passes through the sliding hole and can slide in the sliding hole to form a sliding connection between the rod and the first connecting rod.

[0009] The utility model discloses on the two side walls of the door guardrail inner door upper frame and the two side walls of the first unlocking key are equipped with the elongated guide hole, and the both ends of the sliding shaft pass through the guide hole to guide the sliding of the first connecting rod.

[0010] The utility model discloses a two-way lock assembly, which comprises a shell-shaped second unlocking key and two telescopic second movable locking members, the second unlocking key is sleeved on the first unlocking key and can slide on the first unlocking key, the second movable locking members are transversely arranged on the door guardrail inner door upper frame and the first unlocking key, the inner walls on the two sides of the second unlocking key are provided with inclined surfaces, when the second unlocking key slides away from the lock groove, the inclined surfaces abut against the two ends of the second movable locking members to compress the two ends and make the two ends out of the first unlocking key to be unlocked.

[0011] The utility model discloses a second movable locking member, which is composed of a pair of pipe caps, a fixed pipe and a second spring, the pair of pipe caps are sleeved on the two ends of the second spring and extend into the fixed pipe, the two ends of the fixed pipe are fixed on the inner walls on the two sides of the door guardrail inner door upper frame and correspond to the through holes for the second movable locking members to pass through, the through hole for the second movable locking members to pass through in the first unlocking key is an elongated slot, the inclined surfaces extend into the elongated slot and move in the elongated slot when the second unlocking key slides on the first unlocking key, so that the inclined surfaces abut against the pipe caps to compress the pipe caps and make the pipe caps out of the elongated slot to be unlocked or reset into the elongated slot to be locked after the abutment is removed.

[0012] The utility model discloses a protective sleeve is installed in the port of the door guardrail inner door upper frame, and the lock head moves in the protective sleeve, so that the anti-skid sleeve can effectively prevent the lock head from directly rubbing against the inner door frame.

[0013] The first unlocking key is provided with a recess position corresponding to the second unlocking key, the second unlocking key is located in the recess position, and the surfaces of the second unlocking key and the first unlocking key are flush.

[0014] Compared with the prior art, the utility model has the following remarkable effects:

[0015] (1) The utility model adopts a one-way lock assembly and a two-way lock assembly, and only when the two-way lock assembly is in an unlocked state can the one-way lock assembly be operated to make the first movable locking member out of the lock groove to be unlocked, so that the utility model can reduce the misoperation of children and improve the safety and practicality of the door guardrail.

[0016] 2. In order to meet the security test requirements of the portal column, the pressure between the one-way lock assembly and the outer door frame reaches 45 pounds, the one-way lock assembly of the utility model comprises a first spring and an elongated sliding hole provided on the rod portion of the first movable locking piece, when the one-way lock assembly needs to be changed from the unlocking state to the locking state, the first unlocking key is rotated clockwise, the first connecting rod continues to push not the first movable locking piece but the spring, in this way, the reaction force of the first movable locking piece extruding the outer door lock groove wall can be utilized to increase the pressure between the first movable locking piece and the outside.

[0017] 6. The utility model has the advantages of simple structure, low cost, strong practicability, wide application and popularization. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0019] Figure 1 It is the structure schematic view of the utility model installed on the safety door guardrail;

[0020] Figure 2 It is the structure schematic view of the utility model after removing the one-way lock assembly and the two-way lock assembly on the safety door guardrail;

[0021] Figure 3 It is the structure schematic view of the utility model in the locking state;

[0022] Figure 4 It is the structure explosion drawing of the one-way lock assembly and the two-way lock assembly of the utility model;

[0023] Figure 5 It is the structure cross-sectional view of the utility model in the locking state;

[0024] Figure 6 It is the structure cross-sectional view of the utility model in the locking state;

[0025] Figure 7 It is the structure schematic view of the utility model in the unlocking state;

[0026] Figure 8 It is the structure cross-sectional view of the utility model in the unlocking state;

[0027] Figure 9 It is the structure cross-sectional view of the utility model in the unlocking state.

[0028] In the figure: 1 - the inner door upper frame of the door guard, 2 - the outer frame of the door guard, 3 - the lock slot, 4 - the avoiding slot, 5 - the recess, 6 - the first unlocking key, 7 - the first spring, 8 - the first connecting rod, 9 - the second connecting rod, 10 - the third connecting rod, 11 - the first hinged shaft, 12 - the first through hole, 13 - the second through hole, 14 - the lock head, 15 - the rod part, 16 - the second hinged shaft, 17 - the third hinged shaft, 18 - the fourth hinged shaft, 19 - the sliding hole, 20 - the sliding shaft, 21 - the guide hole, 22 - the second unlocking key, 23 - the inclined surface, 24 - the pipe cap, 25 - the fixed pipe, 26 - the second spring, 27 - the third through hole, 28 - the long slot, 29 - the protective sleeve, 30 - the recess, 31 - the movable plate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.

[0030] As Figures 1-9 shown, it is a locking mechanism of a safety door guard, comprising a lock assembly arranged on the inner door upper frame 1 of the square tube-shaped door guard, a second lock assembly and a lock slot 3 arranged on the top end of the outer frame 2 of the door guard, the lock assembly has a first movable locking piece which can extend into the lock slot 3 to lock or exit the lock slot 3 to unlock, the first movable locking piece can slide along the length direction of the inner door upper frame and can extend out of the end port of the inner door upper frame to extend into or exit the lock slot of the outer door, thereby realizing the locking or unlocking of the inner door and the outer door. The second lock assembly has a second movable locking piece which can interfere with the lock assembly, the first movable locking piece and the second movable locking piece both have a locking position and an unlocking position, when the second movable locking piece is in the locking position, it prevents the operation of the lock assembly to unlock, and when the second movable locking piece is in the unlocking position, it allows the operation of the lock assembly to unlock.

[0031] In the embodiment, the lock assembly comprises a first unlocking key 6 in the shape of a shell, a first movable locking piece installed in the inner door upper frame 1 of the door guard, a first spring 7, and a first link 8, a second link 9 and a third link 10 (one end of the three links is rotatably installed on a fourth hinge shaft 18) connected at one end, the first unlocking key 6 is sleeved on the inner door upper frame 1 of the door guard and is hingedly connected to the inner door upper frame 1 at one end (a first hinge shaft 11 passes through a first through hole 12 of the first unlocking key 6 and a second through hole 13 of the inner door upper frame 1 of the door guard), the other end of the first unlocking key 6 is a free end, so that the first unlocking key can rotate relative to the inner door upper frame 1 about the first hinge shaft 11. The first movable locking piece is composed of a front lock head 14 and a rear rod part 15, the first spring 7 and a movable plate 31 abutting against the first spring 7 are sleeved on the rod part 15 in sequence, the rod end of the rod part 15 is slidably connected with the first link 8, and the end of the first link 8 abuts against the first spring 7 through the movable plate 31. An avoiding slot 4 is formed on the top surface of the inner door upper frame 1 of the door guard, the other end of the third link 10 passes through the avoiding slot 4 and is hingedly connected to the first unlocking key 6 (a second hinge shaft 16 is fixed on the first unlocking key 6, and the other end of the third link 10 is rotatably installed on the second hinge shaft 16 passing through the avoiding slot 4), and the other end of the second link 9 is hingedly connected to the inner door upper frame 1 of the door guard (a third hinge shaft 17 is fixed on the inner door upper frame 1 of the door guard and the first unlocking key 6, and the other end of the second link 9 is rotatably installed on the third hinge shaft 17).

[0032] The rod part 15 of the first movable locking piece has a sliding hole 19 extending along the length direction of the rod part 15, the first link 8 is composed of two parallel rod bodies, one end of the two rod bodies is connected by a sliding shaft 20, the other end of the two rod bodies is hingedly connected with the second link and the third link, the sliding shaft 20 passes through the sliding hole 19 and can slide in the sliding hole 19 to form the sliding connection between the first link 8 and the rod part 15. Long guide holes 21 are formed on the two side walls of the inner door upper frame 1 of the door guard and the two side walls of the first unlocking key 6, and the two ends of the sliding shaft 20 pass through the guide holes 21 to guide the sliding of the first link 8.

[0033] The first unlocking key 6 controls the locking and unlocking of the first movable locking piece and the outer door lock slot through the links, when the first unlocking key 6 is parallel to the inner door upper frame, the first movable locking piece is locked with the outer door, when the first unlocking key 6 is counterclockwise rotated, the first movable locking piece is unlocked with the outer door.

[0034] In the embodiment, the second unlocking key 22 is in the form of a shell and the second movable locking member is retractable at both ends. The second unlocking key 22 is sleeved on the first unlocking key 6 and is slidable on the first unlocking key 6. The first unlocking key 6 has a recess 5 adapted to the second unlocking key 22. The second unlocking key 22 is located in the recess 5 and the surface of the second unlocking key 22 is flush with that of the first unlocking key 6. The second movable locking member is transversely arranged on the upper frame 1 of the inner door of the door guard and the first unlocking key 6. The second movable locking member is composed of a pair of caps 24, a fixed tube 25 and a second spring 26. The pair of caps 24 are sleeved on both ends of the second spring 26 and extend into the fixed tube 25. The fixed tube 25 is fixed at both ends on the inner walls of the upper frame 1 of the inner door of the door guard and corresponds to the third through hole 27 for the second movable locking member to pass through. The through hole of the first unlocking key 6 for the second movable locking member to pass through is an elongated slot 28. The inner walls of the second unlocking key 22 have inclined surfaces 23 which extend into the elongated slot 28 and move in the elongated slot 28 when the second unlocking key 22 slides on the first unlocking key 6 to abut against the caps 24 to make the caps 24 compressed and disengaged from the elongated slot 28 to unlock or reset the caps 24 to be engaged in the elongated slot 28 to lock after the abutment is removed. The caps 24 can interfere with the lower edge of the elongated slot 28 so that the second movable locking member limits the counterclockwise movement of the first unlocking key. If the counterclockwise movement of the first unlocking key is needed, the second movable locking member needs to be disengaged from the elongated slot 28 and the second unlocking key has this function.

[0035] A protective sleeve 29 made of plastic is arranged in the port of the upper frame 1 of the inner door of the door guard. The lock head slides in the protective sleeve so that the protective sleeve can effectively prevent the lock head from directly rubbing against the inner door frame.

[0036] The working principle of the utility model is as follows:

[0037] 1. When the inner door needs to be opened, the second unlocking key is pulled to slide towards the direction away from the lock slot. The inclined surfaces on the inner walls of the second unlocking key compress the two ends of the second movable locking member to make the two ends disengage from the elongated slot of the first unlocking key to unlock, as shown in Figure 8 . Then the first unlocking key is counterclockwise rotated. The first unlocking key pulls the third connecting rod upwards. At the same time, the first connecting rod and the second connecting rod move upwards to pass through the avoiding slot and then pull the first movable locking member to make the lock head disengage from the lock slot to unlock. At this time, the inner door can be opened, as shown in Figure 7 and Figure 9 .

[0038] 2. When the inner door needs to be locked, the first unlocking key is clockwise rotated. The first unlocking key pushes the third connecting rod downwards. At the same time, the first connecting rod and the second connecting rod move downwards to push the first movable locking member to make the lock head extend into the lock slot to lock, as shown in Figure 3Then, the second unlocking key is slid towards the direction of the approaching lock slot, the slope on the inner wall of the second unlocking key leaves the second movable locking member to release the compression, the two ends of the second movable locking member are reset under the restoring force of the spring and are clamped into the long slot to be locked, at this time, the inner door is locked, see Figure 5 and Figure 6 .

[0039] 3. The security test of the portal column requires that the pressure between the one-way lock assembly and the outer door frame reaches 45 pounds, in order to meet the safety requirement, the one-way lock assembly includes the first spring and the long sliding hole on the rod of the first movable locking member, when the one-way lock assembly needs to be transformed from the unlocking state to the locking state, the first unlocking key is rotated clockwise, the first connecting rod continues to push not the first movable locking member but the spring, in this way, the reaction force of the first movable locking member extruding the wall of the outer door lock slot can be utilized to increase the pressure between the first movable locking member and the outside. If the sliding hole is cancelled, the first movable locking member is simply pushed by the first connecting rod, the length of the first movable locking member is difficult to be retracted, and because the first unlocking key bears a large pressure, the consumer is difficult to operate.

[0040] It should be understood that the embodiments are only used for illustrating the present application and are not used for limiting the scope of the present application. In addition, it should be understood that after reading the content taught by the present application, those skilled in the art can make various modifications or changes to the present application, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims

1. A locking mechanism for a safety gate barrier, characterised in that: The application relates to a lock assembly for a door guard, which comprises a one-way lock assembly arranged on the upper frame of the inner door of the door guard, a two-way lock assembly and a lock slot arranged on the outer frame of the door guard, the one-way lock assembly has a first movable locking part capable of extending into the lock slot to lock or withdrawing from the lock slot to unlock, the two-way lock assembly has a second movable locking part capable of interfering with the one-way lock assembly, the first movable locking part and the second movable locking part both have a locking position and an unlocking position, when the second movable locking part is in the locking position, the one-way lock assembly is prevented from being operated to unlock, and when the second movable locking part is in the unlocking position, the one-way lock assembly is allowed to be operated to unlock.

2. A locking mechanism for a safety door guard according to claim 1, characterised in that: The one-way lock assembly comprises a first unlocking key in the shape of a shell, a first movable locking part arranged in the upper frame of the inner door of the door guard, and a first link, a second link and a third link hingedly connected at one end, the first unlocking key is sleeved on the upper frame of the inner door of the door guard and is hingedly connected at one end, the other end is a free end, the first movable locking part is connected with the other end of the first link, the other end of the second link is hingedly connected on the upper frame of the inner door of the door guard, an avoiding slot is arranged on the top surface of the upper frame of the inner door of the door guard, and the other end of the third link is hingedly connected on the first unlocking key through the avoiding slot.

3. A locking mechanism for a safety door guard according to claim 2, characterised in that: The first movable locking part is composed of a lock head at the front and a rod part at the back, a first spring and a movable plate abutting against the first spring are sleeved on the rod part in sequence, the rod end of the rod part is slidably connected with the first link, and the end of the first link abuts against the first spring through the movable plate.

4. A locking mechanism for a safety door guard according to claim 3, characterised in that: The first link is composed of two parallel rod bodies, one end of the two rod bodies is connected through a sliding shaft, an elongated sliding hole is arranged on the rod end of the rod part, and the sliding shaft passes through the sliding hole and can slide in the sliding hole to form the sliding connection between the rod part and the first link.

5. A locking mechanism for a safety door guard according to claim 4, characterised in that: Elongated guide holes are arranged on the two side walls of the upper frame of the inner door of the door guard and the two side walls of the first unlocking key, and the two ends of the sliding shaft pass through the guide holes to guide the sliding of the first link.

6. A locking mechanism for a safety door guard according to claim 5 wherein: The two-way lock assembly comprises a second unlocking key in the shape of a shell and a second movable locking part capable of being extended at two ends, the second unlocking key is sleeved on the first unlocking key and can slide on the first unlocking key, the second movable locking part is arranged on the upper frame of the inner door of the door guard and the first unlocking key in a transverse direction, the inner walls of the two sides of the second unlocking key have inclined surfaces, when the second unlocking key slides in a direction away from the lock slot, the inclined surfaces abut against the two ends of the second movable locking part to compress the two ends and make the second movable locking part out of the first unlocking key to unlock.

7. A locking mechanism for a safety door guard according to claim 6, characterised in that: The second movable locking part is composed of a pair of pipe caps, a fixed pipe and a second spring, the pair of pipe caps are sleeved on the two ends of the second spring and extend into the fixed pipe, the two ends of the fixed pipe are fixed on the inner walls of the two sides of the upper frame of the inner door of the door guard and correspond to the through holes for the second movable locking part to pass through, the through hole for the second movable locking part to pass through in the first unlocking key is an elongated slot, the inclined surfaces extend into the elongated slot and move in the elongated slot when the second unlocking key slides on the first unlocking key, the inclined surfaces abut against the pipe caps to compress the pipe caps and make the pipe caps out of the elongated slot to unlock, or the pipe caps are reset and clamped into the elongated slot to lock after the abutment is removed.

8. A locking mechanism for a safety door guard according to claim 7, characterised in that: The first unlocking key has a recessed position adapted to the second unlocking key, the second unlocking key is located in the recessed position, and the surface of the second unlocking key is flush with the surface of the first unlocking key.

9. A locking mechanism for a safety door guard according to claim 8, characterised in that: A protective sleeve is mounted in the port of the inner door upper frame of the door guard, and the lock head moves in the protective sleeve.

Images