Lock and safety door fence with same

Abstract

According to the lock and the safety door fence with the lock, a lock groove is formed in an outer door fence body, the lock is arranged on an inner door fence body, the inner door fence body can swing relative to the outer door fence body to open or close the door, and when the lock groove is aligned with a spring bolt of the lock, the spring bolt can stretch into the lock groove to lock the inner door fence body and the outer door fence body. The lock comprises a first connecting base movably provided with the spring bolt, a driving piece and a limiting piece are movably arranged on the first connecting base, the driving piece is used for driving the spring bolt to move in the direction of exiting from the lock groove, and the limiting piece is used for making contact with the spring bolt to limit the spring bolt to move in the direction of exiting from the lock groove. The limiting piece needs to be firstly driven to move to be staggered with the lock tongue to relieve limitation on the lock tongue, then the driving piece drives the tongue lock to retreat from the lock groove, and therefore locking of the inner door fence and the outer door fence is achieved, compared with a traditional mode, the unlocking action is operated in two steps, the unlocking difficulty is improved, children cannot learn the unlocking difficulty easily, and the problem that the children can unlock the lock easily by themselves is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of protective door fences, in particular to a lock and a safety door fence having the same. Background Art

[0002] With the progress of social economy, people's safety awareness is getting higher and higher, especially for children. They not only pay attention to their safety outdoors, but also pay attention to their safety indoors. Therefore, parents usually set up safety gates in indoor corridors, stairwells and other locations to eliminate potential dangers.

[0003] The safety gates for children or pets currently on the market generally include an outer gate and an inner gate. The outer gate is fixed at a position to be installed, and the outer gate is rotatably connected to one side of the inner gate. A gate lock is provided on the other side, and a lock slot that cooperates with the gate lock is provided on the outer gate. The outer gate and the inner gate are locked together through the cooperation of the gate lock and the lock slot. However, the gates in the prior art are mainly unlocked by pressing a button or rotating a knob, and the operation method is relatively simple, so that children can unlock by themselves, and therefore, children cannot be effectively confined in a safe area. Utility Model Content

[0004] The main purpose of the utility model is to provide a lock and a safety gate having the same, aiming to solve the problem that the door lock of the existing safety gate is relatively simple to unlock and a child can easily unlock it by himself.

[0005] In order to achieve the above object, the utility model provides a lock, comprising:

[0006] Lock slot;

[0007] A first connecting seat, wherein the first connecting seat is movably provided with a locking tongue, and the locking tongue can move relative to the first connecting seat between a position of extending into the locking groove and a position of withdrawing;

[0008] A driving member, the driving member is arranged on the first connecting seat and is used to drive the locking tongue to perform the movement;

[0009] A limiter is movably arranged on the first connecting seat and can move between a position of contact with the lock tongue and a position offset relative to the first connecting seat. When the limiter contacts the lock tongue, it can limit the lock tongue from moving in a direction of exiting the lock slot, and when offset, it can unlock the restriction.

[0010] Preferably, the driving member is fixedly connected to the locking tongue, or the driving member drives the locking tongue to move via a linkage structure.

[0011] Preferably, when driven by a linkage structure, the driving member includes a button and a first top spring, the first top spring is used to apply an elastic force to the lock tongue to move in the direction of extending into the lock slot, the button is movably arranged at a position above the lock tongue corresponding to the first connecting seat, and can make vertical reciprocating motion relative to the first connecting seat, the linkage structure includes a first inclined surface and a second inclined surface respectively formed on the button and the lock tongue, and during the downward movement of the button, the lock tongue can be driven to move in the direction of exiting the lock slot through the cooperation of the first inclined surface and the second inclined surface.

[0012] Preferably, a button groove with an open top is provided on the top of the first connecting seat, the locking tongue is located at a position inside the first connecting seat corresponding to below the button groove, the button is arranged in the button groove, a vertically extending strip member is formed at the bottom of the button, an end surface of the strip member away from the button is the first inclined surface, the locking tongue sleeve is provided with a clamping sleeve, and the outer wall of the clamping sleeve is formed with the second inclined surface at a position corresponding to below the strip member.

[0013] Preferably, the button groove has limiting grooves formed on two opposite side plates, and the outer wall of the button is formed with a limiting portion for extending into the limiting groove at a position corresponding to the limiting groove. The limiting portion can move in the limiting groove with the movement of the button, and can cooperate with the limiting groove to limit the button from detaching from the top opening of the button groove.

[0014] Preferably, the locking tongue comprises a base and a tongue, the base is movably sleeved with the clamping sleeve, and a through hole is provided on the front side of the clamping sleeve at a position corresponding to the tongue for the tongue to pass through.

[0015] Preferably, a receiving groove for accommodating the locking tongue is formed inside the first connecting seat, and the receiving groove extends in the direction of the locking groove to penetrate the front end wall of the first connecting seat, and a positioning portion is provided on the side of the locking tongue away from the locking groove, and a long arch portion is extended in the direction away from the locking groove on the side of the first connecting seat away from the locking groove, and the receiving groove is connected to the internal space of the arch portion, and the limiting member is arranged in the arch portion, and the front end of the limiting member extends into the receiving groove, and the rear end of the limiting member is rotatably connected to the arch portion so that the limiting member can swing vertically relative to the first connecting seat to drive the front end of the limiting member to move to a position opposite to the positioning portion to limit the locking tongue from moving in the direction of exiting the lock slot or staggering to release the restriction.

[0016] Preferably, the locking tongue has two opposite side walls formed with the positioning portion, and the accommodating groove is formed with a vertically extending positioning hole at a position corresponding to the rear of the positioning portion to connect the accommodating groove with the interior of the arch portion, and the front end of the limiting member is formed with a contact portion at a position corresponding to the positioning hole, and the contact portion can extend into the accommodating groove through the positioning hole.

[0017] Preferably, an arc-shaped pivoting portion is formed at the rear end of the limiting member. A supporting portion is formed on one side of the pivoting portion away from the front end of the limiting member. An arc-shaped concave position adapted to the pivoting portion is formed inside the arch portion at a position corresponding to the upper side of the pivoting portion. A connecting cover is further provided. The connecting cover is detachably installed inside the arch portion at a position adjacent to the pivoting portion. A supporting groove is formed on one side of the connecting cover close to the pivoting portion. The supporting portion can extend into the supporting groove. When the front end of the limiting member moves to a position offset from the positioning portion, the supporting portion follows and moves to contact the bottom wall of the supporting groove.

[0018] The present utility model further provides a safety railing, which includes an outer railing, an inner railing and a lock. The lock is the above-mentioned lock. The lock groove and the first connecting seat are respectively arranged on the outer railing and the inner railing. The side of the inner railing away from the first connecting seat is rotatably connected to the side of the outer railing away from the lock groove. The inner railing can swing relative to the outer railing between positions where the lock groove is aligned with and offset from the lock tongue.

[0019] Preferably, the lock groove is directly formed on the outer railing, or a second connecting seat with the lock groove is further provided, and the second connecting seat is installed on the outer railing.

[0020] Preferably, a moving block is movably installed in the lock groove. The moving block can move between a position flush with the opening of the lock groove and a position away from the opening of the lock groove. A second top spring is further provided. The second top spring is used to apply an elastic force to the moving block in the direction of moving flush with the opening of the lock groove.

[0021] Preferably, a limiting strip is provided on the side of the moving block away from the opening of the lock groove. The limiting strip extends in the direction away from the opening of the lock groove and movably passes through the inner wall of the lock groove and extends into the second connecting seat. A check portion is formed at one end of the limiting strip away from the moving block. The moving block is restricted from disengaging from the lock groove by the check portion. One end of the second top spring elastically abuts against the inner wall of the lock groove, and the other end elastically abuts against the moving block.

[0022] Preferably, a third inclined surface is formed on the outer wall of the second connecting seat, and the third inclined surface is adjacent to the opening of the lock groove.

[0023] Preferably, one side of the inner railing is rotatably connected to the outer railing through a rotating shaft, or the inner railing is rotatably connected to the outer railing through a first hinge structure and a second hinge structure.

[0024] Preferably, the first hinge structure comprises a seat body fixed to the outer door rail and a first swinging member fixed to the inner door rail, the first swinging member is provided with a vertically extending connecting shaft, the seat body is vertically formed with an axial hole open at both ends, the connecting shaft is inserted into the axial hole from top to bottom to realize the rotational cooperation between the swinging member and the seat body, the free end of the connecting shaft is provided with a check valve for limiting the connection shaft from being separated from the axial hole from bottom to top, the upper end opening of the axial hole is formed with a guide groove, the position of the swinging member corresponding to the upper part of the guide groove is formed with a guide part for contacting the guide groove, and in the process of the swinging member swinging in the direction staggered with the lock groove, the cooperation between the guide part and the guide groove can make the swinging member rise relative to the seat body;

[0025] The second hinged structure includes a second swinging member fixed to the inner door rail and a latch inserted into the outer door rail. The latch is rotatably connected to an end of the second swinging member away from the inner door rail. A latch position is formed on the upper end of the latch, and a latch block adapted to the latch position is formed on the second swinging member. The latch block can move between a position entering the latch slot and a position away from the latch slot as the inner door rail swings. When the lock tongue is aligned with the lock slot, the latch block is located in the latch slot.

[0026] Preferably, a third connecting seat with a slot is provided at a position below the lock slot corresponding to the outer door fence, and a telescopic member is movably provided at a position corresponding to the slot of the inner door fence. The telescopic member can move between a position of partial insertion into the slot and a position of withdrawal relative to the inner door fence. A fourth top spring is also provided. The fourth top spring is used to apply an elastic force to the telescopic member to move in the direction of partial insertion into the slot. The outer wall of the third connecting seat is formed with a fourth inclined surface, and the fourth inclined surface is adjacent to the slot opening.

[0027] Preferably, the outer door rail is fixed to the installation position directly or by means of a fixing mechanism, the fixing mechanism includes a locking member movably screwed to the outer door rail, the locking member can move relative to the outer door rail between a position in close contact with and separation from the installation position, the locking member is also screwed to a locking member, the locking member can move relative to the locking member between a position in close contact with the outer door rail to lock and separate the locking member, a plurality of clip portions are formed at annular intervals on one side of the locking member close to the outer door rail, a recess is formed at a position of the outer door rail corresponding to the clip portion, and when the locking member is in close contact with the outer door rail, the clip portion is located in the recess.

[0028] Preferably, the outer door rail includes a cross bar and two vertical bars respectively fixed at both ends of the cross bar, and the inner door rail is located above the cross bar at a position corresponding to between the two vertical bars. The inner door rail is a frame-shaped component formed by multiple connecting rods or a sheet-shaped component with multiple hollows. When it is a frame-shaped component, the inner door rail is covered with software.

[0029] The technical solution of the utility model provides a lock groove on the outer door fence and a lock device on the inner door fence. The inner door fence can swing relative to the outer door fence to form an opening or closing action. When the lock groove is aligned with the lock tongue of the lock device, the lock tongue can extend into the lock groove to lock the inner door fence and the outer door fence. The lock device includes a first connecting seat on which the lock tongue is movably mounted. A driving member and a limiting member are movably arranged on the first connecting seat, respectively. The driving member is used to drive the lock tongue to move in a direction of exiting the lock groove, and the limiting member is used to contact with the lock tongue to limit the lock tongue from moving in a direction of exiting the lock groove. It is necessary to first drive the limiting member to move to be staggered with the lock tongue to release the restriction on the lock tongue, and then drive the tongue lock to exit the lock groove through the driving member to achieve the locking of the inner door fence and the outer door fence. Compared with the traditional method, the unlocking action is divided into two steps, the unlocking difficulty is increased, and it is not easy for children to learn, which effectively solves the problem that children can easily unlock the door by themselves. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional diagram of the utility model;

[0031] Figure 2 It is a schematic diagram of the inner gate fence and the outer gate fence;

[0032] Figure 3 This is a cross-sectional view of the utility model;

[0033] Figure 4 This is an exploded view of the lock;

[0034] Figure 5 for Figure 4 Schematic diagram from another angle. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0038] The utility model provides a lock.

[0039] In the embodiment of the utility model, Figures 1 to 5 As shown, the lock comprises a lock slot 100 , a first connecting seat 1 , a driving member and a limiting member 300 .

[0040] Among them, the first connecting seat 1 is movably provided with a lock tongue 200, and the lock tongue 200 can move relative to the first connecting seat 1 between the position of extending into the lock slot 100 and the position of withdrawing; the driving member is provided on the first connecting seat 1, and is used to drive the lock tongue 200 to perform the above movement; the limiting member 300 is movably provided on the first connecting seat 1, and can move relative to the first connecting seat 1 between the position of contacting with and staggered with the lock tongue 200. When the limiting member 300 contacts the lock tongue 200, it can limit the lock tongue 200 from moving in the direction of withdrawing from the lock slot 100, and can unlock the restriction when staggered.

[0041] Specifically, the driving member is fixedly connected to the locking tongue 200 , or the driving member drives the locking tongue 200 to move through a linkage structure.

[0042] Specifically, when driven by the linkage structure, the driving member includes a button 400 and a first top spring 11, wherein the first top spring 11 is used to apply an elastic force to the lock tongue 200 to move in the direction of extending into the lock slot 100, and the button 400 is movably arranged at a position above the lock tongue 200 corresponding to the first connecting seat 1, and can make vertical reciprocating motion relative to the first connecting seat 1, and the linkage structure includes a first inclined surface and a second inclined surface 201 formed on the button 400 and the lock tongue 200, respectively, and the button 400 can cooperate with the first inclined surface and the second inclined surface 201 to drive the lock tongue 200 to move in the direction of exiting the lock slot 100 during the downward movement. Usually, the first top spring 11 is compressed by manually pressing the button 400 to make a downward movement, and the first top spring 11 is released from the compressed state after the applied external force is removed.

[0043] Specifically, a button groove 12 with an open top is provided at the top of the first connecting seat 1. The locking tongue 200 is located inside the first connecting seat 1 at a position corresponding to the lower part of the button groove 12. The button 400 is arranged in the button groove 12. A strip-shaped member 401 extending vertically is formed at the bottom of the button 400. The end face of the strip-shaped member 401 far away from the button 400 is the first inclined surface. A sleeve 202 is sleeved on the locking tongue 200, and a second inclined surface 201 is formed on the outer wall of the sleeve 202 at a position corresponding to the lower part of the strip-shaped member 401.

[0044] Specifically, the tongue lock and the sleeve body are fixed by interference fit or locked by screws.

[0045] Specifically, the two opposite side plates of the button groove 12 are formed with limiting grooves 13. Limiting parts 402 for extending into the limiting grooves 13 are formed on the outer wall of the button 400 corresponding to the limiting grooves 13. The limiting parts 402 can move in the limiting grooves 13 along with the movement of the button 400, and the cooperation between the limiting parts 402 and the limiting grooves 13 can limit the button 400 from disengaging from the top opening of the button groove 12.

[0046] Specifically, a through hole 14 communicating with the button groove 12 is formed in the front end wall of the first connecting seat 1 corresponding to the button groove 12. A cover body 15 is detachably fixed to the through hole 14 by screw locking or a snap structure, which is convenient for installing or disassembling the button 400.

[0047] Specifically, the locking tongue 200 includes a base and a tongue. The base is movably sleeved with the sleeve 202. A through hole through which the tongue can pass is formed in the front side of the sleeve 202 corresponding to the tongue. When unlocking, the button 400 can drive the sleeve 202 to drive the locking tongue 200 away from the locking groove 100; when an external force presses the tongue, the locking tongue 200 can be forced to move alone in the direction away from the locking groove 100 to facilitate the automatic locking of the safety railing.

[0048] Specifically, a receiving groove 16 for accommodating the lock tongue 200 is formed inside the first connecting seat 1, and the receiving groove 16 extends toward the lock groove 100 to penetrate the front end wall of the first connecting seat 1, and a positioning portion 403 is provided on the side of the lock tongue 200 away from the lock groove 100, and a long arch 17 is extended in the direction away from the lock groove 100 on the side of the first connecting seat 1 away from the lock groove 100, and the receiving groove 16 is connected to the internal space of the arch 17, and the limiting member 300 is arranged in the arch 17, and the front end of the limiting member 300 extends into the receiving groove 16, and the rear end of the limiting member 300 is rotatably connected to the arch 17 so that the limiting member 300 can swing vertically relative to the first connecting seat 1 to drive the front end of the limiting member 300 to move to a position opposite to the positioning portion 403 to limit the lock tongue 200 from moving in the direction of exiting the lock groove 100 or staggering to release the restriction. The button 400 and the limit member 300 are arranged on the first connecting seat 1 in the form of an upper and lower interval, which conforms to the ergonomic design. When the first connecting seat 1 is grasped by the palm, the thumb contacts the button 400, and the other four fingers contact the limit member 300. The limit member 300 can be driven by the other four fingers to swing to release the restriction of the lock tongue 200 by the action of clenching the palm, and then the button 400 can be pressed by the thumb to complete the unlocking action.

[0049] Specifically, the locking tongue 200 has two opposite side walls formed with the positioning portion 403, and the accommodating groove 16 is formed with a vertically extending positioning hole 18 at a position corresponding to the rear of the positioning portion 403 to connect the accommodating groove 16 with the interior of the arch portion 17, and the front end of the limiting member 300 is formed with a contact portion 301 at a position corresponding to the positioning hole 18, and the contact portion 301 can extend into the accommodating groove 16 through the positioning hole 18. When the locking tongue 200 moves in a direction away from the locking groove 100, the locking tongue can be prevented from leaving the locking groove by the direction in which the positioning portion 403 and the contact portion 301 are opposed.

[0050] Specifically, in this embodiment, the positioning portion 403 is formed on the outer wall of the ferrule 202 at a position below the second inclined surface 201 .

[0051] Specifically, the rear end of the limiting member 300 is rotatably installed on the first connecting seat 1 through a rotating shaft, or the rear end of the limiting member 300 is formed with a pivot portion 302 with an arc surface, and a support portion is formed on the side of the pivot portion 302 away from the front end of the limiting member 300, and an arc-shaped recess adapted to the pivot portion 302 is formed at a position corresponding to the top of the pivot portion 302 inside the arch portion 17, and a connecting cover 19 is also provided. The connecting cover 19 is detachably installed at a position corresponding to the position adjacent to the pivot portion 302 inside the arch portion 17, and a supporting groove 191 is formed on the side of the connecting cover 19 close to the pivot portion 302, and the supporting groove 191 can be extended into the supporting groove 191. When the front end of the limiting member 300 moves to a position staggered with the positioning portion 403, the supporting portion moves with it until it contacts the bottom wall of the supporting groove 191 to avoid excessive movement of the front end of the limiting member 300.

[0052] Specifically, two pivoting portions 302 are formed at intervals at the rear end of the limiting member 300 .

[0053] Specifically, when installing the first connecting seat 1 on the inner door rail 3, the inner door rail 3 can be partially surrounded by the cooperation of the arch 17, the limiting member 300 and the connecting cover 19, and then the first connecting seat 1 can be assembled by screwing and locking them with the connecting cover 19, the inner door rail 3 and the arch 17 in sequence. After the screws are unscrewed, the arch 17, the connecting cover 19 and the limiting member 300 can be removed, and the installation and disassembly are very quick.

[0054] Specifically, the inner door rail 3 is provided with a long strip-shaped adjustment hole 21 for the screw to pass through, and when the first connecting seat 1 is too close or too far from the locking groove 100, the assembly position of the screw can be adjusted and then the screw can be locked.

[0055] Furthermore, the first connecting seat 1 and the inner door rail 3 may be screwed and locked in sequence by screws to further lock the first connecting seat 1.

[0056] The utility model also proposes a safety gate fence, including an outer gate fence 2, an inner gate fence 3 and a lock, wherein the lock slot 100 and the first connecting seat 1 are respectively arranged on the outer gate fence 2 and the inner gate fence 3, and the side of the inner gate fence 3 away from the first connecting seat 1 is rotatably connected to the side of the outer gate fence 2 away from the lock slot 100, and the inner gate fence 3 can swing between the positions of aligning and staggering the lock slot 100 and the lock tongue 200 relative to the outer gate fence 2. Other specific contents of the lock can refer to the above embodiment. Since the safety gate fence adopts all the technical solutions of all the embodiments of the above lock, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0057] Specifically, the lock slot 100 is directly formed on the outer door rail 2 , or a second connecting seat 4 having the lock slot 100 is further provided, and the second connecting seat 4 is installed on the outer door rail 2 .

[0058] Specifically, the second connecting seat 4 is detachably fixed to the outer door sill 2 by screw locking or by a snap-fit ​​structure. The snap-fit ​​structure can refer to the prior art, and its specific structural principle will not be described in detail here.

[0059] Specifically, a moving block 41 is movably installed in the lock groove 100. The moving block 41 can move between a position flush with the opening of the lock groove 100 and a position away from the opening of the lock groove 100. Additionally, a second top spring 42 is provided. The second top spring 42 is used to apply an elastic force to the moving block 41 to move it in the direction flush with the opening of the lock groove 100, so as to avoid the situation where foreign objects enter the lock groove 100 and cause the lock tongue 200 to be unable to extend into the lock groove 100. Specifically, the elastic force applied by the second top spring 42 to the moving block 41 should be less than the elastic force applied by the first top spring 11 to the lock tongue 200, so as to ensure that the moving block 41 can be pushed by the lock tongue 200 during the process of the lock tongue 200 extending into the lock groove 100.

[0060] Specifically, a limiting strip 411 is provided on the side of the moving block 41 away from the opening of the lock groove 100. The limiting strip 411 extends in the direction away from the opening of the lock groove 100 and movably passes through the inner wall of the lock groove 100 and extends into the second connecting seat 4. A check portion 412 is formed at the end of the limiting strip 411 away from the moving block 41. The moving block 41 is restricted from disengaging from the lock groove 100 through the check portion 412. One end of the second top spring 42 elastically abuts against the inner wall of the lock groove 100, and the other end elastically abuts against the moving block 41.

[0061] Specifically, the lock groove 100 is in a T shape, and the shape of the moving block 41 is adapted to the shape of the lock groove 100.

[0062] Specifically, a third inclined surface 43 is formed on the outer wall of the second connecting seat 4. The third inclined surface 43 is adjacent to the opening of the lock groove 100. During the process of the inner door bar 3 swinging in the closing direction, the lock tongue 200 can be forced to move away from the lock groove 100 through the third inclined surface 43 until the inner door bar 3 swings to align the lock tongue 200 with the lock groove 100, and then the first top spring 11 applies a force to push the lock tongue 200 into the lock groove 100 to achieve locking.

[0063] Specifically, one side of the inner door bar 3 is rotatably connected to the outer door bar 2 through a rotating shaft, or the inner door bar 3 is rotatably connected to the outer door bar 2 through a first hinge structure and a second hinge structure.

[0064] Specifically, the first hinge structure includes a seat body 51 fixed to the outer door rail 2 and a first swinging member 52 fixed to the inner door rail 3, the first swinging member 52 is provided with a vertically extending connecting shaft 521, the seat body 51 is vertically formed with an axis hole 511 with two ends open, the connecting shaft 521 is inserted from top to bottom into the axis hole 511 to realize the rotational cooperation between the swinging member and the seat body 51, and the free end of the connecting shaft 521 is provided with a check 522 for limiting the connecting shaft 521 from being separated from the axis hole 511 from bottom to top. A guide groove 512 is formed at the upper opening of 511, and a guide portion for contacting the guide groove 512 is formed at a position above the swinging member corresponding to the guide groove 512. During the swinging of the swinging member in a direction offset from the lock groove 100, the swinging member can move upward relative to the seat body 51 through the cooperation between the guide portion and the guide groove 512. After the door is opened, under the influence of gravity and the cooperation between the guide portion and the guide groove 512, the inner door fence 3 always maintains the inertia of swinging in the direction of closing the door, that is, the inner door fence 3 can automatically close the door after opening the door.

[0065] Specifically, the connecting shaft 521 is sleeved with a third top spring 53, one end of the third top spring 53 elastically abuts against the check valve 522, and the other end elastically abuts against the inner wall of the shaft hole 511. After the door is opened, the third top spring 53 is compressed by force, and the elastic force released by the third top spring 53 after the compression is released can further increase the closing speed of the inner door fence 3;

[0066] The second hinged structure includes a second swinging member 61 fixed to the inner door fence 3 and a latch 62 inserted into the outer door fence 2. The latch 62 is rotatably plugged with an end of the second swinging member 61 away from the inner door fence 3. A latch position is formed on the upper end of the latch 62. The second swinging member 61 is formed with a latch block 611 adapted to the latch position. The latch block 611 can move between the position of entering the latch slot and the position of being away from the latch slot as the inner door fence 3 swings. When the lock tongue 200 is aligned with the lock slot 100, the latch block 611 is located in the latch slot.

[0067] Specifically, the outer door fence 2 is provided with a third connection seat 7 having a slot 71 at a position corresponding to the lock slot 100, and the inner door fence 3 is provided with a telescopic member 72 at a position corresponding to the slot 71. The telescopic member 72 can move between a position of partial insertion into the slot 71 and a position of withdrawal relative to the inner door fence 3. A fourth top spring 73 is also provided. The fourth top spring 73 is used to apply an elastic force to the telescopic member 72 to move in a direction of partial insertion into the slot 71. The outer wall of the third connection seat 7 is formed with a fourth inclined surface 74, and the fourth inclined surface 74 is adjacent to the opening of the slot 71. During the swinging of the inner door fence 3 toward the direction in which the telescopic member 72 is aligned with the slot 71, the fourth inclined surface 74 can force the telescopic member 72 to move in a direction away from the slot 71 until the inner door fence 3 swings to align the telescopic member 72 with the slot 71.

[0068] Specifically, the telescopic member 72 can move toward the exit slot 71 by lifting the inner door rail 3 (the latch pin 62 is not fixed to the outer door rail 2), or by the swinging of the inner door rail 3 in cooperation with the guide surface provided on the telescopic member 72; it can also be achieved through a rope linkage, one end of the rope is connected to the button 400 or the limit member 300, and the other end is connected to the telescopic member 72. When the button 400 is pressed or the limit member 300 moves to be offset from the lock tongue 200, the telescopic member 72 can be driven by the rope to move away from the slot 71.

[0069] Specifically, the outer door fence 2 is fixed to the installation position directly (such as screw locking or snap-fit ​​structure fixing, etc.) or by a fixing mechanism, and the fixing mechanism includes a locking member 81 movably screwed to the outer door fence 2, and the locking member 81 can move between a position in close contact with and separation from the installation position relative to the outer door fence 2, and the locking member 81 is also screwed to a locking member 82, and the locking member 82 can move between a position in close contact with the outer door fence 2 to lock and separate the locking member 81 relative to the locking member 81, and a plurality of clips 83 are formed at annular intervals on one side of the locking member 82 close to the outer door fence 2, and a recess 84 is formed at a position of the outer door fence 2 corresponding to the clip 83, and when the locking member 82 is in close contact with the outer door fence 2, the clip 83 is located in the recess 84.

[0070] Specifically, the locking member 81 is arranged on the left outer wall and / or the right outer wall of the outer door fence 2. When it is arranged on the left outer wall or the right outer wall, the outer door fence 2 is fixed by the locking member 81 tightly abutting against the position to be installed and the outer wall of the outer door fence 2 tightly abutting against the position to be installed respectively; when it is arranged on the left outer wall and the right outer wall, the outer door fence 2 is fixed by the locking member 81 located on the left outer wall tightly abutting against the position to be installed and the locking member 81 located on the right outer wall tightly abutting against the position to be installed to form mutual exclusion.

[0071] It should be noted that the above-mentioned locations to be installed are mainly walls.

[0072] Specifically, the outer door fence 2 includes a horizontal bar and two vertical bars respectively fixed to the two ends of the horizontal bar, and the inner door fence 3 is located above the horizontal bar and corresponds to a position between the two vertical bars. The inner door fence 3 is a frame-shaped component formed by connecting multiple connecting rods or a sheet-shaped component with multiple hollows. When it is a frame-shaped component, a software covers the inner door fence 3. Of course, when it is a sheet-shaped component, it can also be covered with software.

[0073] Specifically, the inner door fence 3 can be a foldable structure or a non-foldable structure. When it is a foldable structure, folding is achieved through a joint mechanism. The joint mechanism can refer to the existing technology, and its specific structural principle will not be repeated here.

[0074] Specifically, the first connecting seat can also be installed on the outer door rail, and the second connecting seat is installed on the inner door rail.

[0075] The technical solution of the utility model provides a lock groove on the outer door fence and a lock device on the inner door fence. The inner door fence can swing relative to the outer door fence to form an opening or closing action. When the lock groove is aligned with the lock tongue of the lock device, the lock tongue can extend into the lock groove to lock the inner door fence and the outer door fence. The lock device includes a first connecting seat on which the lock tongue is movably mounted. A driving member and a limiting member are movably arranged on the first connecting seat, respectively. The driving member is used to drive the lock tongue to move in a direction of exiting the lock groove, and the limiting member is used to contact with the lock tongue to limit the lock tongue from moving in a direction of exiting the lock groove. It is necessary to first drive the limiting member to move to be staggered with the lock tongue to release the restriction on the lock tongue, and then drive the tongue lock to exit the lock groove through the driving member to achieve the locking of the inner door fence and the outer door fence. Compared with the traditional method, the unlocking action is divided into two steps, the unlocking difficulty is increased, and it is not easy for children to learn, which effectively solves the problem that children can easily unlock the door by themselves.

[0076] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A lock, characterized in that: include: lock slot (100); A first connecting seat (1), the first connecting seat (1) being movably provided with a locking tongue (200), the locking tongue (200) being movable relative to the first connecting seat (1) between a position of extending into the locking groove (100) and a position of withdrawing; a driving member, the driving member being arranged on the first connecting seat (1) and being used for driving the locking tongue (200) to perform the movement; A limiting member (300) is movably arranged on the first connecting seat (1) and can move relative to the first connecting seat (1) between a position of contact with the lock tongue (200) and a position of being offset; when the limiting member (300) is in contact with the lock tongue (200), the lock tongue (200) can be restricted from moving in a direction of exiting the lock slot (100); when the position is offset, the restriction can be released.

2. The lock according to claim 1, characterized in that: The driving member is fixedly connected to the locking tongue (200), or the driving member drives the locking tongue (200) to move via a linkage structure.

3. The lock according to claim 2, characterized in that: When driven by a linkage structure, the driving member comprises a button (400) and a first top spring (11), wherein the first top spring (11) is used to apply an elastic force to the lock tongue (200) to move in a direction extending into the lock slot (100), the button (400) is movably arranged at a position above the first connecting seat (1) corresponding to the lock tongue (200), and can perform vertical reciprocating motion relative to the first connecting seat (1), and the linkage structure comprises a first inclined surface and a second inclined surface (201) respectively formed on the button (400) and the lock tongue (200), and during the downward movement of the button (400), the lock tongue (200) can be driven to move in a direction of exiting the lock slot (100) through the cooperation of the first inclined surface and the second inclined surface (201).

4. The lock according to claim 3, characterized in that: The first connection seat (1) is provided with a button groove (12) with an open top at the top, the locking tongue (200) is located at a position inside the first connection seat (1) corresponding to the bottom of the button groove (12), the button (400) is arranged in the button groove (12), a vertically extending strip component (401) is formed at the bottom of the button (400), an end surface of the strip component (401) away from the button (400) is the first inclined surface, the locking tongue (200) is provided with a clamping sleeve (202), and the outer wall of the clamping sleeve (202) is formed with the second inclined surface (201) at a position corresponding to the bottom of the strip component (401).

5. The lock according to claim 4, characterized in that: The button groove (12) has two side plates opposite to each other and formed with limiting grooves (13); the outer wall of the button (400) is formed with a limiting portion (402) for extending into the limiting groove (13) at a position corresponding to the limiting groove (13); the limiting portion (402) can move within the limiting groove (13) along with the movement of the button (400); and the limiting portion (402) can cooperate with the limiting groove (13) to limit the button (400) from leaving the button groove (12) from the top opening of the button groove (12).

6. The lock according to claim 4, characterized in that: The locking tongue (200) comprises a base and a tongue, the base is movably sleeved with the clamping sleeve (202), and a through hole is provided on the front side of the clamping sleeve (202) at a position corresponding to the tongue, through which the tongue can pass.

7. The lock according to claim 1, characterized in that: The first connecting seat (1) has an accommodating groove (16) formed inside for accommodating the locking tongue (200), the accommodating groove (16) extending in the direction of the locking groove (100) until penetrating the front end wall of the first connecting seat (1), a positioning portion (403) is provided on a side of the locking tongue (200) away from the locking groove (100), and a long strip-shaped arch portion (17) is formed on a side of the first connecting seat (1) away from the locking groove (100) in the direction away from the locking groove (100), the accommodating groove (16) and the arch portion ( The inner space of the first connecting seat (17) is communicated with the inner space of the first connecting seat (17), the limiting member (300) is arranged in the arch portion (17), the front end of the limiting member (300) extends into the accommodating groove (16), and the rear end of the limiting member (300) is rotatably connected to the arch portion (17) so that the limiting member (300) can swing vertically relative to the first connecting seat (1) to drive the front end of the limiting member (300) to move to a position relative to the positioning portion (403) to limit the movement of the lock tongue (200) in the direction of exiting the lock groove (100) or to offset to release the restriction.

8. The lock according to claim 7, characterized in that: The locking tongue (200) has two opposite side walls on which the positioning portion (403) is formed, and a vertically extending positioning hole (18) is formed through the accommodating groove (16) at a position corresponding to the rear of the positioning portion (403) so that the accommodating groove (16) is communicated with the interior of the arch portion (17), and a contact portion (301) is formed at a front end of the limiting member (300) at a position corresponding to the positioning hole (18), and the contact portion (301) can extend into the accommodating groove (16) through the positioning hole (18).

9. The lock according to claim 7, characterized in that: A pivoting portion (302) having an arc surface is formed at the rear end of the limiting member (300), a support portion is formed on a side of the pivoting portion (302) away from the front end of the limiting member (300), an arc-shaped recessed portion adapted to the pivoting portion (302) is formed at a position corresponding to the top of the pivoting portion (302) inside the arch portion (17), and a connecting cover (19) is also provided. The connecting cover (19) is detachably mounted at a position corresponding to the position adjacent to the pivoting portion (302) inside the arch portion (17), a supporting groove (191) is formed on a side of the connecting cover (19) close to the pivoting portion (302), and the supporting groove (191) can be inserted into the supporting groove. When the front end of the limiting member (300) moves to a position offset from the positioning portion (403), the supporting portion moves with the movement until it contacts the bottom wall of the supporting groove (191).

10. A safety gate, characterized in that: The invention comprises an outer door fence (2), an inner door fence (3) and a lock as claimed in any one of claims 1 to 9, wherein the lock slot (100) and the first connecting seat (1) are respectively arranged on the outer door fence (2) and the inner door fence (3), and a side of the inner door fence (3) away from the first connecting seat (1) is rotatably connected to a side of the outer door fence (2) away from the lock slot (100), and the inner door fence (3) can swing relative to the outer door fence (2) between positions where the lock slot (100) and the lock tongue (200) are aligned and offset.

11. The safety gate according to claim 10, characterized in that: The lock slot (100) is directly formed on the outer door rail (2), or a second connection seat (4) having the lock slot (100) is further provided, and the second connection seat (4) is mounted on the outer door rail (2).

12. The safety gate according to claim 10, characterized in that: A moving block (41) is movably mounted in the lock slot (100), and the moving block (41) can move between a position flush with the opening of the lock slot (100) and a position away from the opening of the lock slot (100). A second top spring (42) is also provided, and the second top spring (42) is used to apply an elastic force to the moving block (41) to move in a direction flush with the opening of the lock slot (100).

13. The safety gate according to claim 12, characterized in that: A limiting strip (411) is provided on one side of the movable block (41) away from the opening of the locking slot (100). The limiting strip (411) extends in a direction away from the opening of the locking slot (100) and moves through the inner wall of the locking slot (100) to extend into the second connecting seat (4). A check portion (412) is formed on one end of the limiting strip (411) away from the movable block (41). The check portion (412) limits the movable block (41) from leaving the locking slot (100). One end of the second top spring (42) elastically abuts against the inner wall of the locking slot (100), and the other end elastically abuts against the movable block (41).

14. The safety gate according to claim 11, characterized in that: The outer wall of the second connecting seat (4) is formed with a third inclined surface (43), and the third inclined surface (43) is adjacent to the opening of the locking groove (100).

15. The safety gate according to claim 10, characterized in that: One side of the inner door fence (3) is rotatably connected to the outer door fence (2) via a rotating shaft, or the inner door fence (3) is rotatably connected to the outer door fence (2) via a first hinge structure and a second hinge structure.

16. The safety gate according to claim 15, characterized in that: The first hinge structure comprises a seat body (51) fixed to the outer door rail (2) and a first swinging member (52) fixed to the inner door rail (3), the first swinging member (52) being provided with a vertically extending connecting shaft (521), the seat body (51) being vertically formed with an axial hole (511) with both ends open, the connecting shaft (521) being inserted into the axial hole (511) from top to bottom to realize rotational cooperation between the swinging member and the seat body (51), a check valve (522) being provided at the free end of the connecting shaft (521) for limiting the connection shaft (521) from being separated from the axial hole (511) from bottom to top, a guide groove (512) being formed at the upper end opening of the axial hole (511), a guide portion for contacting the guide groove (512) being formed at a position above the swinging member corresponding to the guide groove (512), and during the swinging member swinging in a direction offset from the lock groove (100), the swinging member can move upward relative to the seat body (51) through cooperation between the guide portion and the guide groove (512); The second hinge structure comprises a second swinging member (61) fixed to the inner door rail (3) and a latch (62) inserted into the outer door rail (2); the latch (62) is rotatably plugged into an end of the second swinging member (61) away from the inner door rail (3); a latch position is formed at the upper end of the latch (62); the second swinging member (61) is formed with a latch block (611) adapted to the latch position; the latch block (611) can move between a position of entering the latch slot and a position of being away from the latch slot as the inner door rail (3) swings; when the lock tongue (200) is aligned with the lock slot (100), the latch block (611) is located in the latch slot.

17. The safety gate according to claim 10, characterized in that: The outer door fence (2) is provided with a third connecting seat (7) having a slot (71) at a position below the lock slot (100); the inner door fence (3) is provided with a telescopic member (72) at a position corresponding to the slot (71); the telescopic member (72) can move between a position of being partially inserted into the slot (71) and a position of being withdrawn relative to the inner door fence (3); a fourth top spring (73) is further provided; the fourth top spring (73) is used to apply an elastic force to the telescopic member (72) to move in a direction of being partially inserted into the slot (71); and a fourth inclined surface (74) is formed on an outer wall of the third connecting seat (7); the fourth inclined surface (74) is adjacent to an opening of the slot (71).

18. The safety gate according to claim 10, characterized in that: The outer door fence (2) is fixed to the position to be installed directly or by a fixing mechanism, the fixing mechanism comprising a locking member (81) movably screwed to the outer door fence (2), the locking member (81) being movable between a position in close contact with and a position separated from the position to be installed relative to the outer door fence (2), the locking member (81) being further screwed to a locking member (82), the locking member (82) being movable between a position in close contact with the outer door fence (2) to lock and a position separated relative to the locking member (81), a plurality of locking portions (83) being formed at annular intervals on one side of the locking member (82) close to the outer door fence (2), a recessed portion (84) being formed on the outer door fence (2) at a position corresponding to the retaining portion (83), and when the locking member (82) is in close contact with the outer door fence (2), the retaining portion (83) is located in the recessed portion (84).

19. The safety gate according to claim 10, characterized in that: The outer door fence (2) comprises a crossbar and two vertical bars respectively fixed at both ends of the crossbar. The inner door fence (3) is located above the crossbar and corresponds to a position between the two vertical bars. The inner door fence (3) is a frame-shaped component formed by connecting multiple connecting rods or a sheet-shaped component with multiple hollow parts. When it is a frame-shaped component, the inner door fence (3) is covered with software.

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