Child safety door with barrier tensioning device

Abstract

A child safety door has a flexible retractable barrier member (3) wound on a rotating roller (R), including a locking device (10) connected to the rotating roller (R). In the unlocked position, the locking device (10) allows the barrier member (3) to be pulled out in the spreading direction of the roller (R). In the locked position, the locking device (10) prevents the barrier member (3) from being further pulled out in the deployment direction. The locking device (10) comprises an actuator (11) movable between a first position corresponding to the unlocked position and a second position corresponding to the locked position. Upon actuation of the actuator (11) in the closed door position, the barrier member (3) is reversed in a direction opposite the pull-out direction to provide additional tensioning of the barrier member (3).

Description

Technical Field

[0001] The present invention generally relates to a child safety gate for a passageway, such as a door opening, and a locking device included in such a child safety gate. Background Art

[0002] Child safety gates, also known as child safety barriers, have been in use for decades. By the end of 1990, Lascal AB (Sweden) developed a new type of child safety gate whose gate components were made of a mesh fabric wrapped around and retracted from a vertical shaft fixed to one side of the door opening. The retractable child safety gate was first introduced to the world market by Lascal AB and then by Lascal Ltd (Hong Kong, China) under the trade name "KiddyGuard".

[0003] Other examples of child safety door structures are disclosed, for example, in WO94 / 00664A1 and US5690317A. These types of child safety doors have a barrier component made of a flexible material, which is wound around a vertical roller, which is contained in a roller unit installed on one side of the passage. When the door is closed, the barrier component is unfolded and rolled out from the roller unit. In the closed position, the free end of the barrier component is attached to the opposite side of the passage. In the closed position, the barrier component is usually slightly tensioned by a return spring, which pulls the barrier component in the direction opposite to the unfolding direction. Further background technology is reflected in, for example, US7219709B1, US6375165B1, US20080121354A1 and US20150376942A1.

[0004] The problem with most existing door structures is that when the door is closed and the barrier is pressed down or lifted upward, for example by a child, the extent of vertical movement of the barrier in its closed position is determined solely by the spring force. Therefore, if the spring force is too large, the door will require too much closing force, which is inconvenient for the user. Conversely, if the spring force is too small, a child may easily step over the barrier or crawl under the barrier, which is dangerous and may cause serious injury. As can be understood from the above, there is room for improvement. Summary of the invention

[0005] The object of the present invention is to solve or at least alleviate the problems associated with the prior art. This object is achieved by a child safety gate according to the present invention, which has the features set out in the attached claim 1; preferred embodiments are defined in the associated dependent claims. The invention also relates to a locking device having the features set out in the attached claim 13.

[0006] In a first aspect, a child safety gate is provided, which has a flexible retractable barrier component wound on a rotating roller. A locking device is connected to the rotating roller and has at least an unlocked position and a locked position. The locking device is configured to allow the barrier component to be pulled out at least in the deployment direction of the roller in its unlocked position, and to prevent the barrier component from being further pulled out in the deployment direction in its locked position. In addition, the locking device includes an actuating assembly, which is movable between a first position corresponding to the unlocked position of the locking device and a second position corresponding to the locked position of the locking device. When the actuating assembly is actuated, the barrier component is reversed in a direction opposite to the deployment direction. By means of this improved child safety gate, effective and safe tensioning of the flexible barrier component is achieved in the locked position.

[0007] In one embodiment, the actuation assembly is actuated by translational movement of the actuation assembly from its first position to its second position.

[0008] In another embodiment, a child safety gate includes a locking mechanism movably connected to the actuation assembly and configured to reverse the barrier component in a direction opposite to the deployment direction.

[0009] Actuation of the actuation assembly may cause rotational movement of the first and second members of the locking mechanism to engage, thereby reversing the roller and tensioning the flexible retractable barrier component.Preferably, the first and second members of the locking mechanism are configured to be rotatably coupled to each other.

[0010] The first member and the second member may have corresponding gears configured to mesh with each other upon actuation of the actuation assembly.

[0011] Preferably, the second member of the locking mechanism is fixedly connected to the roller.

[0012] In one embodiment, the first member has a cover with a cam protruding radially outwardly from the cover. There may also be more than one cam protrusion.

[0013] Furthermore, the locking device may also have a housing with a cam groove, and the protruding cam is configured to slide in the cam groove from the first end to the second end when the first member and the second member are engaged.

[0014] In one embodiment, the first member of the locking mechanism is connected to the actuation assembly via a connector.The actuation assembly is preferably manually actuated by a user.

[0015] In a second aspect, a locking device for a child safety gate is provided, the child safety gate having a flexible retractable shielding member wound on a rotating roller. The locking device is connectable to the rotating roller and has at least an unlocked position and a locked position. In its unlocked position, the locking device is configured to allow the barrier member to be pulled out at least in the deployment direction of the roller, and in its locked position prevents further pulling out of the barrier member in the deployment direction. The locking device includes an actuating assembly that is movable between a first position corresponding to the unlocked position of the locking device and a second position corresponding to the locked position. When the actuating assembly is actuated, the barrier member is reversed in a direction opposite to the deployment direction by means of a locking mechanism.

[0016] In general, the locking device of the present invention is configured to make a child gate safer by an additional locking step, which further tensions the retractable barrier member in the closed position compared to conventional safety gates in the prior art. The additional locking and barrier tensioning effect is achieved by an ingenious locking device that cooperates with the actuating assembly. The locking device may include the aforementioned components of the locking mechanism, which in a preferred embodiment includes a sliding locking engagement of the cam protrusion in the cam groove between the first and second different positions. In other words, when the locking device is locked, the roller is reversed by the apparent movement of the cam in the cam groove, thereby tensioning the flexible retractable barrier member that has been stretched between the opposite sides of the channel. Effectively, the barrier member is reversed in a direction opposite to the pull-out direction to provide additional tensioning of the barrier member.

[0017] The advantage of tensioning is that a wide range of openings can be secured and therefore there is adaptability to different households. Furthermore, tensioning results in a relatively more tensioned barrier, with a tensioning effect on the upper part of the barrier facing away from the floor and on the bottom of the barrier close to the floor. In this way, children or pets are even further prevented from climbing or crawling under the safety door as described above due to the tensioning effect of the locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Embodiments of the present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0019] Figure 1 The figure shows a child safety door arranged at the passage in an open state.

[0020] Figure 2 Shows the closed state Figure 1 Child safety gates,

[0021] Figure 3 The locking device of the child safety door is shown in the unlocked state.

[0022] Figure 4 yes Figure 3Detailed view of the locking device after unlocking,

[0023] Figure 5 yes Figure 3 Detailed view of the locking device in the locked state,

[0024] Figure 6 Shows Figure 4 The cross section of the locking device in the unlocked state,

[0025] Figure 7 Shows Figure 5 The cross section of the locking device in the locked state, and

[0026] Figure 8 Shows the installation Figure 1-2 Optional child safety door. DETAILED DESCRIPTION

[0027] Reference Figure 1-2 , shows a child safety gate 1, also known as a retractable safety barrier. The child safety gate 1 is installed in a passage, such as a door opening, and comprises a flexible barrier member 3 wound on a rotating roller R (see Figure 3 ). Alternatively, the barrier member 3 may also be referred to as a flexible barrier sheet or screen. For example, the barrier member 3 may be made of a natural or synthetic material, such as cloth or textile fabric, or any flexible material that can be attached to and wrapped around the roller R. Optionally, the roller with the barrier member is housed in a roller housing with an elongated slot from which the barrier member can be retracted (not shown).

[0028] like Figure 1 and 2 As shown, the door 1 also has a support structure 2, which is mounted to a vertical wall portion 4 of a passage, such as a doorway DW defined by the wall portion 4 and an opposite wall portion 5, to which the fastening device 6 of the child safety door 1 is mounted. For example, the wall portions 4, 5 can be part of a door frame. The fastening device 6 includes an upper retaining device 7 and a lower retaining device 8 suitable for receiving and holding the barrier component 3 when the child safety door 1 is in its closed position. Optionally, the upper retaining devices are interconnected by rails to form a single unit (not shown). Preferably, the support structure 2 and the fastening device 6 of the door 1 are mounted to the wall portions 4, 5 by screws, although other special accessories, nails, adhesives or strong magnets can also be used. Preferably, the support structure 2 and the fastening device 6 are mounted substantially parallel to each other, as defined by their longitudinal extensions.

[0029] In order to close the doorway DW, the barrier component 3 is manually pulled out and the fixing means 3A at its upper free end is attached to the fastening means 6 at the upper retaining means 7 mounted to the opposite wall portion 5. The fastening means 6 is adapted to hold the barrier component 3 in its pulled-out position. The corresponding fixing means 3B at the lower free end of the barrier component 3 is connected to the fastening means 6 at the lower retaining means 8. Preferably, the barrier component 3 is provided with a barrier handle 3C for the convenience of the user.

[0030] Furthermore, the child safety gate 1 comprises a locking device 10 located on the top of the support structure 2, i.e. at the upper end of the support structure 2, which will be combined with the following Figure 4-7 The child safety gate 1 has an open position and a closed position corresponding to the unlocked position and the locked position of the locking device 10 , respectively.

[0031] The roller R is connected at its upper end to a locking device 10, see Figure 3 At its lower end, the roller R is connected to a rewinding device 9 configured to provide a torque for rotating the roller R to rewind the barrier member 3 onto the roller R after the barrier member 3 has been pulled out. In other words, the barrier member 3 is biased so that it automatically reverses or rewinds from the unrolled state to the wound state.

[0032] As briefly mentioned, the locking device 10 has at least a locked state or position, and an unlocked state. In its unlocked state, the locking device 10 is configured to allow at least the pulling out of the barrier component 3. In other words, in the unlocked state of the locking device 10, the barrier component 3 can be pulled out in the unwinding direction of the roller R, and once pulled out can be retracted in the winding direction of the roller R. In its locked state, the locking device 10 is configured to indirectly rotate the barrier component 3 in the winding direction of the roller R, so that the barrier component 3 is tensioned. Tensioning is an internal locking mechanism 12 (see Figure 4 and 5 ), which will be described further below. Thus, in the locked state or position of the locking device 10, further pulling out of the barrier component 3 is prevented, and the barrier component 3 is tensioned in a manner that further prevents children or pets from crawling under or climbing the safety door, compared to most child safety doors that simply lock the door without further tensioning.

[0033] Figure 3 The locking device 10 is shown in an unlocked state, wherein the barrier element 3 can be moved back and forth in the direction indicated by the double arrow A. Here, the barrier element 3 is partially extended and wound around a roller R. The dotted line marks the circumference of the roller R. The rotation axis of the roller R coincides with the center axis CA of the locking device 10 .

[0034] Now go to Figure 4-7 , an overview of the locking device 10 and its components will be presented.

[0035] As described above, the locking device 10 is movable between an unlocked position and a locked position. Figure 1 , 3 , 4 and 6, the locked position is Figure 2 , 5 , 7 and 8. The conversion of the locking device 10 between these two positions is actuated or performed by an actuating assembly or an actuator having a locking handle 11. As shown, the locking handle 11 can be moved between a first position corresponding to the unlocked position of the locking device 10 and a second position corresponding to the locked position of the locking device 10. For example, the locking handle 11 can be raised and lowered corresponding to the open position and the closed position of the child safety door 1, respectively. When lifted, the locking handle 11 disengages or disconnects the previously mentioned internal locking mechanism 12, which unlocks the locking device 10 and thereby also unlocks the safety door 1 and enables at least the barrier component 3 to be pulled out. Optionally, the door 1 is unlocked by rotating or pulling the locking handle 11. In other words, the locking handle 11 should not be interpreted as being limited to the shape of the handle itself. For example, in Figure 3 In the embodiment of the present invention, the locking handle 11 is lifted upward, and the barrier member 3 rolls on / off the roller R freely.

[0036] The locking mechanism 12 has a first member in the shape of an upper locking wheel LWU and a second member in the shape of a lower locking wheel LWL. The upper and lower locking wheels LWU, LWL are configured to be rotatably coupled to each other. In addition, when the locking device 10 is unlocked, the upper and lower locking wheels LWU, LWL can rotate relative to each other. Figure 6 and 7 In the embodiment shown, the wheels LWU, LWL are connected by screws S.

[0037] The upper locking wheel LWU has an outer cover 13 and an inner gear 14 along the inner circumference of the outer cover 13, see Figure 4 The lower locking wheel LWL is fixedly connected to the roller R and has an outer gear 15 adapted to cooperate with the corresponding inner gear 14 of the upper locking wheel LWU. When the locking handle 11 is lifted upward from the floor, the inner and outer gears 14, 15 are disengaged, as shown in FIG. Figure 6 On the contrary, when the locking handle 11 is pressed toward the floor, the inner and outer gears 14 and 15 mesh with each other, as shown in FIG. Figure 7 Optionally, there may be additional gears (not shown) cooperating in the meshing between the upper locking wheel LWU and the lower locking wheel LWL.

[0038] In other words, the rotational engagement between the upper locking wheel LWU and the lower locking wheel LWL is caused by pushing the locking handle 11 toward the upper locking wheel LWU in a direction substantially perpendicular to the central axis CA passing through the locking device 10. In this case, the central axis CA corresponds to the rotation axis of the upper locking wheel LWU and the lower locking wheel LWL. Figure 4-7 As shown, and as Figure 6 and 7 As more clearly shown, the upper locking wheel LWU moves axially along the central axis CA of the locking device 10 towards and away from the lower locking wheel LWL in response to lifting or lowering of the activation locking handle 11 .

[0039] Back to Figure 3 The locking device 10 has a housing 16. Figure 4-7 In order to show the interior of the locking device 10, a large portion of the housing 16 is removed for illustrative purposes. Figure 4 and 5 It can be clearly seen in the figure that the locking device 10 is provided with an inclined cam groove 17, and the corresponding cam or cam protrusion 18 is configured to slide in the cam groove 17. The cam groove 17 can also be called a rotation groove 17, which is semicircular or arc-shaped. Figure 4 and 5 As schematically shown in the figure, a cam protrusion 18, shown as a knob in this embodiment, is arranged on a side of the cover 13 of the upper locking wheel LWU opposite to the internal gear 14, and is able to slide in the rotation groove 17 between different first upper ends and different second lower ends of the rotation groove 17. As an embodiment, when the locking handle 11 is lifted, the knob 18 slides from the lower end to the upper end as the locking wheels LWU, LWL are disengaged. In this case, the locking mechanism 12 is deactivated. On the contrary, when the upper locking wheel LWU and the lower locking wheel LWL are engaged, the knob 18 slides from the upper end to the lower end. Preferably, the knob 18 protrudes radially outward from the cover 13. The cam protrusion 18 can also be in the shape of a pin or the like.

[0040] exist Figure 4 and 5 In the figure, only two knobs 18 and grooves 17 are shown. However, in reality, there may be one, two or more knobs 18. The knobs 18 are arranged spaced apart along the surface of the cover 13 of the upper locking wheel LWU. In addition, the rotation grooves 17 and the knobs 18 are arranged at corresponding positions along the circumference of the locking mechanism 12. Preferably, the knobs 18 and the rotation grooves 17 are spaced apart substantially equidistantly along the locking mechanism 12. Figure 4 It can be clearly seen in FIG. 1 that when the locking handle 11 is lifted, the knob 18 is located at the upper end of the rotation slot 17, and Figure 5 When the locking handle 11 is lowered, the knob 18 slides downward in the winding direction of the roller R to the lower end of the rotation groove 17.

[0041] When the inner gear 14 of the upper locking wheel LWU and the outer gear 15 of the lower locking wheel LWL are in contact, the upper locking wheel LWU moves further toward the lower locking wheel LWL, for example, when the user pushes the actuation locking handle 11 downward, the push knob 18 slides from the upper end of the rotation groove 17 to the lower end of the rotation groove 17, so that the gear 14 of the upper locking wheel LWU and the gear 15 of the lower locking wheel LWL are engaged. In this way, the locked flexible retractable barrier component 3 is not only locked, but also tensioned. Therefore, the actuation of the locking handle 11 causes the upper locking wheel LWU and the lower locking wheel LWL of the locking mechanism 12 to engage with the rotational movement, thereby reversing the roller R and tensioning the flexible retractable barrier component 3 in the direction opposite to the unfolding direction of the roller R.

[0042] In order to improve safety during operation, the locking handle 11 can be equipped with a locking release element, such as a locking release button 19. The purpose of the locking release button 19 is to keep the locking handle 11 in the locked position when the child safety gate 1 is about to be closed. The locking release button 19 is spring-biased so that when the user pulls the locking release button 19, the locking handle 11 can be lifted. When the biasing spring contracts, which occurs when the user pulls the locking release button 19, the locking handle 11 can move, for example, lift upward. This is Figure 3 , 4 6. When the locking handle 11 is lifted, the door, i.e. the flexible barrier member 3, can be pulled out and / or retracted. Conversely, when the actuating locking handle 11 is pushed downward from the raised position, once the child safety door 1 is fixed at the wall portion 5 opposite to the locking device 10 and the roller R, the flexible barrier member 3 is stretched and tensioned by the locking mechanism 12.

[0043] When the actuator is actuated, in this case the locking handle 11 is lifted, the flexible retractable barrier element 3 is reversed by the locking mechanism 12 in the direction opposite to the unwinding direction of the roller R, and it is the action of the locking mechanism 12 that determines whether the barrier element 3 can be extended / retracted. In other words, when the door is closed and the locking device 10 is in its locked state, the locking mechanism 12 ensures the tensioning of the barrier element 3. This occurs when the knob 18 has moved to the lower end of the rotation slot 17, as shown in FIG. Figure 5 shown.

[0044] As an example, when actuated, the actuator 11 may provide a full retraction of the barrier member 3. In other words, the actuator 11 may cause the barrier member 3 to be reversed all the way back into the roller R.

[0045] In order to convert the basic pivoting movement of the locking handle 11 into a vertically displaceable rotational movement of the internal locking mechanism 12 along the central axis CA of the locking device 10, the locking mechanism 12 is movably connected to the locking handle 11 via a series of intermediate elements 20-25 (see description below), which together can be considered as a translation assembly.

[0046] The translational movement of the actuated locking handle 11 can be described as a linear displacement towards the upper locking wheel LWU, which in turn causes a rotational movement of the upper locking wheel LWU towards the lower locking wheel LWL. Alternatively, the translational movement of the locking handle 11 is described as a rotational translational movement, whereby the linear movement of the locking handle 11 or the actuator along the central axis CA of the locking device 10 is converted into a rotational movement of the locking mechanism 12. Furthermore, the translational movement of the locking handle 11 can be described as a rotational movement, which in turn causes a further rotational movement of the locking mechanism 12 once it has been actuated, for example by rotation.

[0047] The locking handle 11 is connected to a locking arm 20, which is provided with a slot 21 in its end, and a rivet 22 is configured to travel in the slot 21 between a first position corresponding to an unlocked position of the locking device 10 and a second position corresponding to a locked position of the locking device 10. The rivet 22 is coupled to a connector 23 (at Figure 4 and Figure 5 2 ), which in turn is connected to the cover 13 of the upper locking wheel LWU of the locking mechanism 12. Therefore, when the locking handle 11 is lifted, the locking arm 20 is automatically raised, and the connector 23 moves via the movement of the rivet 22 in the narrow slot 21, so that the upper locking wheel LWU follows the movement of the locking handle 11, that is, upward and away from the lower locking wheel LWL, so that the safety door 1 is unlocked and the retractable barrier 3 can be pulled out and / or retracted. Correspondingly, when the locking handle 11 is pushed downward, the locking arm 20 moves downward in the direction toward the upper locking wheel LWU. Therefore, the door 1 is locked and the barrier component 3 is extended.

[0048] In addition, the locking arm 20 has a toothed end 24 opposite the slotted end, which is configured to engage with matching teeth on a spring biasing element 25. As shown, the spring biasing element 25 is located in the locking device housing 16 at the height of the lower locking wheel LWL and, when it engages with the toothed end 24 of the locking arm 20, causes the locking handle 11 to have different upper and lower positions. This gradual engagement between the teeth Figure 6 and 7 Shown in.

[0049] Preferably, the locking device 10 is also equipped with a sensor device, for example comprising a magnet 26, which may be located on the locking arm 20 and sensed by a magnet sensor 27 (for example a PCB magnet sensor) located in the locking device 10. For example, the sensor device may be arranged in the housing 16 of the locking device 10. The magnet 26 and the sensor 27 are arranged in Figure 6 and 7 If the door 1 remains open for a predetermined amount of time, for example greater than about 20 seconds, the sensor device activates the alarm system of the locking device 10, which alerts the user.

[0050] Therefore, through a series of intermediate elements 20-25, the locking arm 20 converts the movement of the locking handle 11 into the rotational movement of the upper locking wheel LWU and the lower locking wheel LWL of the locking mechanism 12, so that when the locking handle 11 moves from the unlocking position to the locking position of the locking device 10, the internal gear 14 meshes with the external gear 15. In this movement, the knob 18 arranged on the cover 13 of the upper locking wheel LWU slides from the upper end to the lower end of the rotation groove 17, thereby reversing the roller R in the direction opposite to the unwinding direction of the roller R, and thus the flexible retractable barrier member 3 wound around the roller R is also reversed. In the embodiment described herein, this occurs when the locking handle 11 is pushed downward in the direction toward the upper locking wheel LWU. As described above, on the contrary, when the locking handle 11 is lifted, as Figure 4 and Figure 6 As shown, it will disengage or disconnect the upper locking wheel LWU and the lower locking wheel LWL of the internal locking mechanism 12, thereby unlocking the safety door 1.

[0051] The barrier tensioning mechanism can also be described as follows. After the safety door barrier component 3 is fixed on the opposite side of the passage to be blocked, the rewinding device 9 rewinds the barrier component 3 so that it stretches between the opposite sides of the opening. Next, the actuating locking handle 11 is pushed in the direction toward the upper locking wheel LWU, and the inner gear 14 of the upper locking wheel LWU first contacts the lower locking wheel LWL, which has a corresponding outer gear 15 and is fixed to the roller R, on which the barrier component 3 is wound. When the locking handle 11 is pushed further downward, the two locking wheels LWU and LWL that are now connected are forced to rotate in the opposite direction of the unwinding direction of the roller R because the rotating knob 18 of the upper locking wheel LWU follows the rotating groove 17. This rotation further stretches the barrier component 3. In particular, the movement of the knob 18 in the rotating groove 17 determines the tension of the barrier component 3. As an example, the tension of a passage of 80 cm width is substantially the same as the tension of a passage of 60 cm width.

[0052] Reference Figure 8 , shows an alternative installation of a child safety gate 1. The same principles apply to the gate locked by the locking device 10 and its related features as described above.

[0053] It should be understood that, although many features and advantages of the invention have been set forth in the foregoing description, as well as details of the structure and function of the invention, the description is illustrative only and that changes in detail, particularly in shape, size and arrangement of parts, may be made within the scope of the invention to the full extent indicated by the appended claims. Modifications are therefore possible without departing from the spirit of the invention as defined in the appended claims. For example, other movements of the actuator and the associated components of the barrier tensioning and locking device may be used, provided that additional tensioning of the barrier portion is achieved; in a direction opposite to the pull-out direction.

Claims

1. A child safety gate having: a flexible retractable barrier member (3), the barrier member (3) being wound around a rotating roller (R); and a locking device (10), the locking device (10) being connected to the rotating roller (R); wherein, The locking device (10) has at least an unlocking position and a locking position, wherein the locking device (10) is configured to at least allow the barrier component (3) to be pulled out along the unfolding direction of the roller (R) in its unlocking position, and wherein the locking device (10) is configured to prevent the barrier component (3) from being further pulled out along the unfolding direction in its locking position; wherein the locking device (10) comprises an actuating assembly (11), wherein the actuating assembly (11) is movable between a first position corresponding to the unlocking position of the locking device (10) and a second position corresponding to the locking position of the locking device (10); and wherein, when the actuating assembly (11) is actuated, the barrier component (3) is reversed in a direction opposite to the unfolding direction.

2. The child safety door according to claim 1, wherein: The actuating assembly (11) is actuated by a translational movement of the actuating assembly (11) from its first position to its second position.

3. The child safety gate according to claim 1 or 2, further comprising a locking mechanism (12) movably connected to the actuating assembly (11) and configured to reverse the barrier component (3) in the direction opposite to the deployment direction.

4. The child safety door according to claim 3, wherein: Actuation of the actuation assembly (11) causes rotational movement of the first member (LWU) and the second member (LWL) of the locking mechanism (12) to engage, thereby reversing the roller (R) and tensioning the flexible retractable barrier member (3).

5. The child safety door according to claim 4, wherein: The first member (LWU) and the second member (LWL) of the locking mechanism (12) are configured to be rotatably coupled to each other.

6. The child safety door according to claim 4 or 5, wherein: When the locking device (10) is in the unlocked position, the first member (LWU) and the second member (LWL) are rotatable relative to each other.

7. The child safety door according to any one of claims 4 to 6, wherein: The first member (LWU) and the second member (LWL) have corresponding gears (14, 15) configured to mesh with each other when the actuation assembly (11) is actuated.

8. The child safety door according to any one of claims 4 to 7, wherein: The second member (LWL) of the locking mechanism (12) is fixedly connected to the roller (R).

9. The child safety door according to any one of claims 4 to 8, wherein: The first member (LWU) has a cover (13) having a cam (18) protruding radially outward from the cover (13).

10. The child safety gate according to claim 9, wherein: The locking device (10) also includes a housing (16) having a cam slot (17), the cam (18) being configured to slide in the cam slot (17) from a first end to a second end when the first member (LWU) and the second member (LWL) are engaged.

11. The child safety door according to any one of claims 4 to 10, wherein: The first member (LWU) of the locking mechanism (12) is connected to the actuating assembly (11) via a connector (23).

12. A child safety gate according to any one of the preceding claims, wherein: The actuating assembly (11) is manually actuated by a user.

13. A locking device for a child safety gate (1) having a flexible retractable barrier member (3) wound on a rotating roller (R), wherein: The locking device (10) is connectable to the rotating roller (R), the locking device (10) having at least an unlocking position and a locking position; wherein the locking device (10) is configured to at least allow the barrier component (3) to be pulled out along the unfolding direction of the roller (R) in its unlocking position; wherein the locking device (10) is configured to prevent the barrier component (3) from being further pulled out along the unfolding direction in its locking position; wherein the locking device (10) comprises an actuating assembly (11), the actuating assembly (11) being movable between a first position corresponding to the unlocking position of the locking device (10) and a second position corresponding to the locking position of the locking device (10); and wherein, when the actuating assembly (11) is actuated, the barrier component (3) is reversed in a direction opposite to the unfolding direction.

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