Telescopic door sill

Abstract

The utility model discloses a telescopic door fence, which is characterized in that a first connecting piece and a second connecting piece are matched to form an outer door fence with a passage space, an inner door fence matched with the passage space is pivotally arranged on the outer door fence, and a door fence lock is used for locking the outer door fence and the inner door fence. After the size of the passing space is correspondingly adjusted according to the size of a to-be-installed position, the first connecting piece and the second connecting piece are locked through the locking structure, so that an outer door fence matched with the to-be-installed position is obtained, then the outer door fence is assembled on the to-be-installed position, and the inner door fence and the outer door fence are assembled, so that the assembly of the door fence is completed. Compared with the prior art, a consumer can correspondingly adjust the fixing device to a proper size according to the size of a to-be-installed position and then assemble and fix the fixing device on the to-be-installed position, the fixing device can be suitable for assembly positions of different sizes, and the requirements of the consumer are effectively met.

Description

Technical Field

[0001] This utility model relates to the field of gate technology, and in particular to a retractable gate. Background Technology

[0002] For example, the utility model patent application CN202020070927.3 discloses a door lock and door frame, which includes an inner door frame and an outer door frame. The outer door frame is a U-shaped structure formed by multiple connecting rods and is a non-adjustable structure. When purchasing the door frame, consumers need to choose the appropriate length of door frame according to the size of the installation location. Although the length of the door frame can be in various specifications, consumers may not be able to purchase the door frame of the specifications they need, resulting in the inability to meet consumer needs. Utility Model Content

[0003] The main purpose of this utility model is to provide a retractable door frame, which aims to provide a door frame whose length can be adjusted according to the size of the installation location to meet consumer needs.

[0004] To achieve the above objectives, this utility model proposes a retractable gate, comprising:

[0005] The outer gate includes a first connector and a second connector. The first connector and the second connector cooperate to form an expandable or shrinkable passage space. After the passage space is expanded or shrunk by the cooperation of the first connector and the second connector, the first connector and the second connector are locked by a locking structure.

[0006] The inner door is adapted to the passage space. One side of the inner door is pivotally connected to the first connector and can swing horizontally relative to the outer door to open or close the passage space.

[0007] A gate lock, used to lock the inner gate and the outer gate.

[0008] Preferably, the first connector and the second connector are L-shaped. The lower end of the second connector has a plug-in position for the lower end of the first connector to be inserted into or withdrawn from. When the first connector moves towards the lower end to be inserted into the plug-in position, the passage space can be reduced. When the first connector moves towards the lower end to withdraw from the plug-in position, the passage space can be expanded.

[0009] Preferably, the lower end of the second connector is provided with a strip-shaped member having the insertion position, or the insertion position is directly formed on the lower end of the second connector.

[0010] Preferably, the locking structure is a bolt locking or a snap-fit ​​structure. When it is bolt locking, the lower end of the second connector is provided with a plurality of first locking holes, which are spaced apart along the length of the lower end of the second connector. The lower end of the first connector is provided with a second locking hole. When the first locking hole and the second locking hole are aligned, the first connector and the second connector are locked by screwing in the bolt.

[0011] Preferably, the inner door railing includes a first door body and a second door body that are movably connected. The second door body can move between positions that coincide with or are offset from the first door body, so as to shorten or lengthen the inner door railing.

[0012] Preferably, the inner door frame is further provided with a locking mechanism for locking the first door and the second door. The locking mechanism includes a fastener and a locking plate. The fastener is C-shaped and is used to cover a portion of the top of the first door and a portion of the top of the second door. The locking plate is locked to the fastener by screws to secure the portion of the top of the first door and the portion of the top of the second door, thereby locking the first door and the second door.

[0013] Preferably, the inner door frame is provided with two locking mechanisms, which are respectively located at the top and bottom of the inner door frame.

[0014] Preferably, the inner door frame is further provided with a guide mechanism, the guide mechanism including a first guide member provided on the first door body and a second guide member provided on the second door body, the first guide member having a first guide hole for the top of the second door body to move through, and the second guide member having a second guide hole for the top of the first door body to move through.

[0015] Preferably, the inner door frame is provided with two guide mechanisms, which are respectively located at the top and bottom of the inner door.

[0016] Preferably, the upper end of the first connector is provided with a first pivot seat and a second pivot seat at an interval between the upper and lower parts. The first door body is provided with a first pivot part and a second pivot part on the side close to the first connector, corresponding to the positions of the first pivot seat and the second pivot seat. The first pivot part and the second pivot part are respectively movably inserted into the first pivot seat and the second pivot seat from top to bottom, so as to realize the pivotal connection between the inner door frame and the first connector.

[0017] Preferably, the upper end of the first connector is fixed with a first back plate and a second back plate at an interval, and the first pivot seat and the second pivot seat are respectively detachably plugged into the first back plate and the second back plate to realize the quick assembly or quick disassembly of the inner door frame and the outer door frame.

[0018] Preferably, the first connector is provided with two lugs spaced apart vertically, and the first back plate and the second back plate are respectively fixed to the two lugs.

[0019] Preferably, the first pivot seat is movably provided with a locking key, which can move relative to the first pivot seat between a position partially opposite to the bottom wall of the first back plate to restrict the first pivot seat from disengaging from the first back plate and a position offset to release the restriction. A first top spring is also provided, which is used to apply a spring force to the locking key in a direction that partially moves towards the bottom wall of the first back plate.

[0020] Preferably, the first pivot portion includes a base and a tube. The base is used for fixed connection with the inner door frame. The upper end of the tube is movably connected to the base. The lower end of the tube is integrally formed with the first pivot seat, or the lower end of the tube is inserted into the first pivot seat from top to bottom and kept fastened to the first pivot seat, so as to realize the pivotable assembly of the base and the first pivot seat.

[0021] Preferably, the door lock includes a first latch and a first lock groove. The first lock groove is located at the upper end of the second connector. The first latch is movably located on the second door body and can move relative to the second door body between positions where it is partially inserted into the first lock groove to lock the inner and outer door rails and where it is released from locking the inner and outer door rails.

[0022] Preferably, the second door body is provided with a limiting member having a through hole. The limiting member can reciprocate vertically relative to the second door body so that the through hole moves to be partially aligned with or offset from the first latch. When offset, the limiting member is opposite to the first latch to restrict the movement of the first latch. When aligned, the first latch can partially move through the through hole to release the limiting member's restriction on the first latch.

[0023] Preferably, the gate lock further includes a second lock groove and a second lock tongue. The second lock groove is located at the lower end of the second connector. The second lock tongue is movably located on the second door body and can move relative to the second door body between a partially inserted position into the second lock groove and a partially withdrawn position. The second lock tongue and the limiting member are linked by a rope. When the limiting member is partially aligned with the first lock tongue in the through hole, the rope can drive the second lock tongue to move in the direction of withdrawing from the second lock groove. A fifth top spring is also provided, which is used to apply a spring force to the second lock tongue to move in the direction of partially inserting into the second lock groove.

[0024] Preferably, the first fastener is pivotally screwed onto the side of the first connector away from the inner door frame, and the second fastener is pivotally screwed onto the side of the second connector away from the inner door frame. The first fastener can move relative to the first connector between a position that is locally close to and away from the installation position, and the second fastener can move relative to the second connector between a position that is locally close to and away from the installation position. When both the first fastener and the second fastener are closely close to their respective positions, the outer door frame is secured to the installation position.

[0025] Preferably, both the side of the first connector away from the inner door frame and the side of the second connector away from the inner door frame are provided with vertically extending connecting strips.

[0026] This utility model's technical solution uses a first connecting member and a second connecting member to form an outer doorway with passage space. An inner doorway, pivotally mounted to fit the passage space, is provided within the outer doorway. A doorway lock is used to lock both the outer and inner doorways. During assembly, the passage space is adjusted according to the size of the installation location, and the first and second connecting members are locked using the locking structure, resulting in an outer doorway adapted to the installation location. The outer doorway is then assembled into the installation location, and the inner doorway is assembled with the outer doorway to complete the assembly of this utility model. Compared to traditional methods, consumers can adjust this utility model to a suitable size according to the size of the installation location before assembling and fixing it in place, making it suitable for different sized installation locations and effectively meeting consumer needs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the present invention when it is extended;

[0028] Figure 2 This is a schematic diagram of the present invention when it is shortened;

[0029] Figure 3 This is a perspective view of the first connector;

[0030] Figure 4 This is a perspective view of the second connector;

[0031] Figure 5 This is a three-dimensional diagram of the first gate.

[0032] Figure 6 This is a three-dimensional diagram of the second gate.

[0033] Figure 7 A cross-sectional view showing the mating of the first locking tongue and the limiting member;

[0034] Figure 8 A cross-sectional view showing the engagement of the moving block and the second locking tongue;

[0035] Figure 9 This is a cross-sectional view showing the mating of the first pivot part and the first pivot seat. Detailed Implementation

[0036] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0037] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0039] This utility model proposes a retractable gate.

[0040] In this embodiment of the utility model, such as Figures 1 to 9 As shown, the retractable gate includes an outer gate, a locking mechanism, an inner gate, and a gate lock.

[0041] The outer gate includes a first connector 1 and a second connector 2, which cooperate to form an expandable or shrinkable passage space. After the passage space is expanded or shrunk by the cooperation of the first connector 1 and the second connector 2, the first connector 1 and the second connector 2 are locked by a locking structure. The inner gate is adapted to the passage space. One side of the inner gate is pivotally connected to the first connector and can swing horizontally relative to the outer gate to open or close the passage space. The gate lock is used to lock the inner gate and the outer gate.

[0042] Specifically, the first connector 1 and the second connector 2 are L-shaped. The lower end of the second connector 2 is provided with a plug-in position 51 for the lower end of the first connector 1 to be inserted or withdrawn. When the first connector 1 moves in the direction of inserting into the plug-in position 51, the passage space can be reduced. When the first connector 1 moves in the direction of withdrawing from the plug-in position 51, the passage space can be expanded.

[0043] Specifically, the first connector 1 and the second connector 2 are integrally formed or are formed by connecting multiple connecting rods.

[0044] Specifically, the lower end of the second connector 2 is provided with a strip member 5 having the insertion position 51, or the insertion position 51 is directly formed on the lower end of the second connector 2. When the strip member is provided, the strip member 5 is locked to the lower end of the second connector 2 by screws or by a snap-fit ​​structure.

[0045] Specifically, the locking structure is either bolt locking or snap-fit ​​fixing. When bolt locking is used, the lower end of the second connector 2 is provided with a plurality of first locking holes 21, which are spaced apart along the length of the lower end of the second connector 2. The lower end of the first connector 1 is provided with a second locking hole 11. When the first locking hole 21 and the second locking hole 11 are aligned, the first connector 1 and the second connector 2 are locked by screwing in the bolt.

[0046] Specifically, in this embodiment, such as Figure 3 As shown, the first lock hole 21 is provided on the strip member 5.

[0047] Specifically, in one embodiment, the first connector 1 and the second connector 2 are not plugged into each other, but are directly fixed by screws or snap-fit ​​structures.

[0048] Specifically, the inner gate has multiple implementation schemes. In one embodiment, the inner gate is a single structure, and consumers can directly purchase the inner gate of the appropriate size according to the final required passage space of the outer gate.

[0049] In this embodiment, such as Figure 1 and Figure 2 As shown, the inner doorway includes a first door body 3 and a second door body 4 that are movably connected. The second door body 4 can move between positions that overlap with or are offset from the first door body 3, thereby shortening or lengthening the inner doorway. In this way, even if the size of the passageway changes, the length of the inner doorway can be adjusted accordingly, eliminating the hassle for consumers of purchasing inner doorways of a different size due to changes in passageway space.

[0050] Specifically, the inner door frame is also provided with a locking mechanism for locking the first door 3 and the second door 4. The locking mechanism includes a fastener 61 and a locking plate 62. The fastener 61 is C-shaped and is used to cover a portion of the top of the first door 3 and a portion of the top of the second door 4. The locking plate 62 is locked to the fastener 61 by screws to lock the portion of the top of the first door 3 and the portion of the top of the second door 4, thereby locking the first door 3 and the second door 4.

[0051] Specifically, the inner door frame is provided with two locking mechanisms, which are respectively located at the top and bottom of the inner door frame.

[0052] Specifically, the inner door frame is also provided with a guide mechanism, which includes a first guide member 71 provided on the first door body 3 and a second guide member 72 provided on the second door body 4. The first guide member 71 is provided with a first guide hole for the top of the second door body 4 to move through, and the second guide member 72 is provided with a second guide hole for the top of the first door body 3 to move through.

[0053] The first door 3 and the second door 4 can be movably connected through the first guide 71 and the second guide 72, and can be locked by the locking mechanism after being extended or shortened.

[0054] Specifically, the first guide member 71 and the second guide member 72 are detachably plugged into the first door body 3 and the second door body 4, respectively.

[0055] Specifically, the inner door frame is equipped with two guide mechanisms, which are respectively located at the top and bottom of the inner door. The two guide mechanisms are mirror images of each other.

[0056] Specifically, the upper end of the first connector 1 is provided with a first pivot seat 12 and a second pivot seat 13 spaced vertically. The first door body 3 is provided with a first pivot part 22 and a second pivot part 23 on the side close to the first connector 1, corresponding to the positions of the first pivot seat 12 and the second pivot seat 13. The first pivot part 22 and the second pivot part 23 are respectively inserted into the first pivot seat 12 and the second pivot seat 13 from top to bottom, so as to realize the pivotal connection between the inner door frame and the first connector 1.

[0057] Specifically, the upper end of the first connector 1 is fixed with a first back plate 14 and a second back plate 15 at intervals. The first pivot seat 12 and the second pivot seat 13 are respectively detachably plugged into the first back plate 14 and the second back plate 15 to realize the quick assembly or quick disassembly of the inner door frame and the outer door frame.

[0058] Specifically, the first connector 1 has two lugs 16 spaced apart vertically, and the first back plate 14 and the second back plate 15 are respectively fixed to the two lugs 16. The fixing method is screw locking or snap-fit ​​structure fixing.

[0059] Specifically, the first pivot seat 12 is movably provided with a locking key 17. The locking key 17 can move relative to the first pivot seat 12 between a position partially opposite to the bottom wall of the first back plate 14 to restrict the first pivot seat 12 from disengaging from the first back plate 14 and a position offset to release the restriction. A first top spring 18 is also provided, which applies a spring force to the locking key 17 to move it in the direction partially opposite to the bottom wall of the first back plate 14. The locking key 17 has a driving part; to unlock, the locking key 17 can be moved in the direction of releasing the restriction by pressing the driving part.

[0060] Specifically, the first pivot joint 22 includes a base 121 and a tube 122. The base 121 is fixedly connected to the inner door frame. The upper end of the tube 122 is movably connected to the base 121, and the lower end of the tube 122 is integrally formed with the first pivot joint 12, enabling the base 121 and the first pivot joint 12 to be pivotally assembled. Alternatively, the lower end of the tube 122 can be inserted into the first pivot joint 12 from top to bottom and secured to it via an interference fit, screw locking, or a snap-fit ​​structure. This allows for both pivotal assembly of the base 121 and the first pivot joint 12 and detachable assembly of the first pivot joint 12 and the base 121.

[0061] Specifically, a rivet 123 is movably provided at the upper end of the insertion tube 122. The lower end of the rivet 123 is located inside the insertion tube 122, and the upper end of the rivet 123 passes through the top wall of the insertion tube 122 and connects to the base 121, realizing a pivotal connection between the insertion tube 122 and the base 121. At the same time, the insertion tube 122 can also perform vertical reciprocating motion relative to the base 121. A second top spring 124 is sleeved on the part of the rivet 123 inside the insertion tube 122. The upper and lower ends of the second top spring 124 elastically abut against the inner top wall of the insertion tube 122 and the cap of the rivet 123, respectively. The pivot seat 12 is provided with a guide groove 125, and the base 121 is provided with a contact part 126 for contacting the guide groove 125. When the inner door bar swings in the opening direction, the guide groove 125 and the contact part 126 guide the inner door bar to rise relative to the outer door bar during the opening process, and the second top spring 124 is compressed accordingly. When the inner door bar swings in the closing direction, the second top spring 124 is released from compression. Through the elastic force released by the second top spring 124 and the guide groove 125 and the contact part 126, the inner door bar can automatically swing in the closing direction to achieve the automatic closing effect.

[0062] Specifically, the door lock includes a first locking tongue 81 and a first locking groove 82. The first locking groove 82 is located at the upper end of the second connector 2. The first locking tongue 81 is movably located on the second door body 4 and can move relative to the second door body 4 between the position of partially inserting into the first locking groove 82 to lock the inner door and the outer door and the position of withdrawing to release the inner door and the outer door from locking.

[0063] Specifically, a third top spring (not shown) is also provided, which is used to apply a spring force to the first locking tongue 81 to move it in the direction of partial insertion into the first locking groove 82.

[0064] Specifically, the second connector 2 is provided with a window (not shown) that communicates with the first lock groove 82, through which it can be observed whether the first lock tongue 81 is inserted into the first lock groove 82.

[0065] Specifically, the second connector 2 has a first inclined surface (not shown) at a position adjacent to the opening of the first lock groove 82. During the swing of the inner door bar in the closing direction, it can contact the first latch 81 through the first inclined surface and force the first lock groove 82 to move in the direction of exiting the first lock groove 82. At the same time, the third top spring is compressed. When the inner door bar swings to the point where the first latch 81 is aligned with the first lock groove 82, the third top spring is released from compression and releases its elastic force to drive the first lock groove 82 to partially insert into the first lock groove 82, thereby achieving an automatic locking effect.

[0066] Specifically, the first locking tongue 81 includes a drive block. When the inner and outer door rails are unlocked, the first locking tongue 81 is driven out of the first locking groove 82 by the drive block.

[0067] Specifically, the second door body 4 is movably provided with a limiting member 83 having a through hole 84. The limiting member 83 can reciprocate vertically relative to the second door body 4 so that the through hole 84 moves to be partially aligned with or offset from the first latch 81. When offset, the limiting member 83 is opposite to the first latch 81 to restrict the movement of the first latch 81. When aligned, the first latch 81 can partially move through the through hole 84 to release the restriction of the first latch 81 by the limiting member 83.

[0068] Specifically, a fourth top spring (not shown) is also provided, which is used to apply a spring force to the limiting member 83 to move in a direction that partially offsets the through hole 84 from the first locking tongue 81.

[0069] Specifically, the gate lock also includes a second lock groove 86 and a second lock tongue 85. The second lock groove 86 is located at the lower end of the second connecting member 2. The second lock tongue 85 is movably mounted on the second door body 4 and can move relative to the second door body 4 between a partially inserted position into the second lock groove 86 and a partially withdrawn position. The second lock tongue 85 and the limiting member 83 are linked by a rope. When the limiting member 83 partially aligns with the first lock tongue 81 towards the through hole 84, the rope can drive the second lock tongue 85 to move in the direction of withdrawing from the second lock groove 86. A fifth top spring 87 is also provided, which is used to apply a spring force to the second lock tongue 85 to move in the direction of partially inserting into the second lock groove 86. The end of the rope away from the second lock tongue 85 can be connected to the first lock tongue 81 in addition to being connected to the limiting member 83, so that when the first lock tongue 81 withdraws from the first lock groove 82, the second lock tongue 85 can withdraw from the second lock groove 86.

[0070] Specifically, the second door body 4 has an inclined surface at a position adjacent to the opening of the second lock groove 86. During the swing of the inner door bar in the closing direction, it can contact the second lock tongue 85 through the inclined surface and force the second lock tongue 85 to move away from the second lock groove 86. At the same time, the fifth top spring 87 is compressed. When the inner door bar swings to the point where the second lock tongue 85 is aligned with the second lock groove 86, the fifth top spring 87 is released from compression and releases the elastic force so that the second lock tongue 85 is partially inserted into the second lock groove 86.

[0071] Specifically, the second door body 4 is movably provided with a moving block 88, which can reciprocate vertically relative to the second door body 4. The end of the rope away from the first locking tongue 81 is connected to the moving block 88. The second locking tongue 85 is movably installed on the moving block 88 and can reciprocate vertically relative to the moving block 88. A sixth top spring 89 is also provided, which is used to apply a spring force to the moving block 88 in the downward direction.

[0072] Specifically, the first connector 1 is pivotally connected to a first fastener 91 on the side away from the inner door frame, and the second connector 2 is pivotally connected to a second fastener 92 on the side away from the inner door frame. The first fastener 91 can move relative to the first connector 1 between a position that is locally close to and away from the installation position, and the second fastener 92 can move relative to the second connector 2 between a position that is locally close to and away from the installation position. When both the first fastener 91 and the second fastener 92 are closely close to their respective positions, the outer door frame is secured to the installation position.

[0073] Specifically, there are two first fasteners 91, which are spaced apart vertically on the first connector 1; there are two second fasteners 92, which are spaced apart vertically on the second connector 2.

[0074] Specifically, both the first connector 1 and the second connector 2, located away from the inner door frame, are provided with vertically extending connecting strips 100, which are in an arc shape.

[0075] This utility model's technical solution uses a first connecting member and a second connecting member to form an outer doorway with passage space. An inner doorway, pivotally mounted to fit the passage space, is provided within the outer doorway. A doorway lock is used to lock both the outer and inner doorways. During assembly, the passage space is adjusted according to the size of the installation location, and the first and second connecting members are locked using the locking structure, resulting in an outer doorway adapted to the installation location. The outer doorway is then assembled into the installation location, and the inner doorway is assembled with the outer doorway to complete the assembly of this utility model. Compared to traditional methods, consumers can adjust this utility model to a suitable size according to the size of the installation location before assembling and fixing it in place, making it suitable for different sized installation locations and effectively meeting consumer needs.

[0076] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A retractable gate, characterized in that, include: The outer gate includes a first connector (1) and a second connector (2). The first connector (1) and the second connector (2) cooperate to form an enlargeable or shrinkable passage space. After the passage space is enlarged or reduced by the cooperation of the first connector (1) and the second connector (2), the first connector (1) and the second connector (2) are locked by a locking structure. The inner door is adapted to the passage space. One side of the inner door is pivotally connected to the first connector and can swing horizontally relative to the outer door to open or close the passage space. A gate lock, used to lock the inner gate and the outer gate.

2. The retractable gate as described in claim 1, characterized in that: The first connector (1) and the second connector (2) are L-shaped. The lower end of the second connector (2) is provided with a plug-in position (51) for the lower end of the first connector (1) to be inserted or withdrawn. When the first connector (1) moves in the direction of inserting into the plug-in position (51) at the lower end, the passage space can be reduced. When the first connector (1) moves in the direction of withdrawing from the plug-in position (51) at the lower end, the passage space can be expanded.

3. The retractable gate as described in claim 2, characterized in that: The lower end of the second connector (2) is provided with a strip member (5) having the insertion position (51), or the insertion position (51) is directly formed on the lower end of the second connector (2).

4. The retractable gate as described in claim 1, characterized in that: The locking structure is either bolt locking or snap-fit ​​structure fixing. When bolt locking is used, the lower end of the second connector (2) is provided with multiple first locking holes (21), and the multiple first locking holes (21) are distributed at intervals along the length direction of the lower end of the second connector (2). The lower end of the first connector (1) is provided with a second locking hole (11). When the first locking hole (21) and the second locking hole (11) are aligned, the first connector (1) and the second connector (2) are locked by screwing the bolts together.

5. The retractable gate as described in claim 1, characterized in that: The inner door railing includes a first door body (3) and a second door body (4) that are movably connected. The second door body (4) can move between positions that coincide with or are offset from the first door body (3) to shorten or lengthen the inner door railing.

6. The retractable gate as described in claim 5, characterized in that: The inner door frame is also provided with a locking mechanism for locking the first door (3) and the second door (4). The locking mechanism includes a fastener (61) and a locking plate (62). The fastener (61) is C-shaped and is used to cover the partial top of the first door (3) and the partial top of the second door (4). The locking plate (62) is locked to the fastener (61) by screws to lock the partial top of the first door (3) and the partial top of the second door (4), thereby locking the first door (3) and the second door (4).

7. The retractable gate as described in claim 6, characterized in that: The inner door frame is provided with two locking mechanisms, which are respectively located at the top and bottom of the inner door frame.

8. The retractable gate as described in claim 5, characterized in that: The inner door frame is also provided with a guide mechanism, which includes a first guide member (71) provided on the first door body (3) and a second guide member (72) provided on the second door body (4). The first guide member (71) is provided with a first guide hole for the top of the second door body (4) to move through, and the second guide member (72) is provided with a second guide hole for the top of the first door body (3) to move through.

9. The retractable gate as described in claim 8, characterized in that: The inner door is provided with two guide mechanisms, which are respectively located at the top and bottom of the inner door.

10. The retractable gate as described in claim 5, characterized in that: The first connector (1) is provided with a first pivot seat (12) and a second pivot seat (13) at an interval between its upper and lower parts. The first door body (3) is provided with a first pivot part (22) and a second pivot part (23) on the side of the first connector (1) corresponding to the first pivot seat (12) and the second pivot seat (13). The first pivot part (22) and the second pivot part (23) are respectively inserted into the first pivot seat (12) and the second pivot seat (13) from top to bottom, so as to realize the pivotal connection between the inner door frame and the first connector (1).

11. The retractable gate as described in claim 10, characterized in that: The upper end of the first connector (1) is fixed with a first back plate (14) and a second back plate (15) at intervals. The first pivot seat (12) and the second pivot seat (13) are respectively detachably plugged into the first back plate (14) and the second back plate (15) to realize the quick assembly or quick disassembly of the inner door frame and the outer door frame.

12. The retractable gate as described in claim 11, characterized in that: The first connector (1) is provided with two lugs (16) spaced apart vertically, and the first back plate (14) and the second back plate (15) are respectively fixed to the two lugs (16).

13. The retractable gate as described in claim 11, characterized in that: The first pivot (12) is movably provided with a locking key (17), which can move relative to the first pivot (12) between a position partially opposite to the bottom wall of the first back plate (14) to restrict the first pivot (12) from disengaging from the first back plate (14) and a position offset to release the restriction. A first top spring (18) is also provided, which is used to apply a spring force to the locking key (17) in a direction partially opposite to the bottom wall of the first back plate (14).

14. The retractable gate as described in claim 10, characterized in that: The first pivot part (22) includes a base (121) and a tube (122). The base (121) is used to be fixedly connected to the inner door frame. The upper end of the tube (122) is movably connected to the base (121). The lower end of the tube (122) is integrally formed with the first pivot seat (12), or the lower end of the tube (122) is inserted into the first pivot seat (12) from top to bottom and kept fastened to the first pivot seat (12), so as to realize the pivotable assembly of the base (121) and the first pivot seat (12).

15. The retractable gate as described in claim 5, characterized in that: The door lock includes a first latch (81) and a first lock groove (82). The first lock groove (82) is located at the upper end of the second connector (2). The first latch (81) is movably located on the second door body (4). The first latch (81) can move relative to the second door body (4) between the position where it is partially inserted into the first lock groove (82) to lock the inner door and the outer door and the position where it is released from locking the inner door and the outer door.

16. The retractable gate as described in claim 15, characterized in that: The second door body (4) is movably provided with a limiting member (83) having a through hole (84). The limiting member (83) can make vertical reciprocating movements relative to the second door body (4) so ​​that the through hole (84) moves to be partially aligned with or offset from the first latch (81). When offset, the limiting member (83) is opposite to the first latch (81) to restrict the movement of the first latch (81). When aligned, the first latch (81) can partially move through the through hole (84) to release the limitation of the limiting member (83) on the first latch (81).

17. The retractable gate as described in claim 16, characterized in that: The gate lock also includes a second lock groove (86) and a second lock tongue (85). The second lock groove (86) is located at the lower end of the second connector (2). The second lock tongue (85) is movably located on the second door body (4) and can move relative to the second door body (4) between the position of partially inserting into the second lock groove (86) and the position of withdrawing. The second lock tongue (85) and the limiting member (83) are linked by a rope. When the limiting member (83) is partially aligned with the first lock tongue (81) in the through hole (84), the second lock tongue (85) can be driven by the rope to move in the direction of withdrawing from the second lock groove (86). A fifth top spring (87) is also provided. The fifth top spring (87) is used to apply a spring force to the second lock tongue (85) to move in the direction of partially inserting into the second lock groove (86).

18. The retractable gate as described in claim 1, characterized in that: The first connector (1) is pivotally connected to a first fastener (91) on the side away from the inner door frame, and the second connector (2) is pivotally connected to a second fastener (92) on the side away from the inner door frame. The first fastener (91) can move relative to the first connector (1) between a position that is locally close to and away from the installation position, and the second fastener (92) can move relative to the second connector (2) between a position that is locally close to and away from the installation position. When both the first fastener (91) and the second fastener (92) are closely close to their respective positions, the outer door frame is secured to the installation position.

19. The retractable gate as described in any one of claims 1 to 18, characterized in that: The first connector (1) and the second connector (2) are both provided with vertically extending connecting strips (100) on the side away from the inner door frame.

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