CN216110454U - Door sill limiting device - Google Patents

Abstract

The utility model relates to the technical field of door tools, in particular to a door sill limiting device. Comprises a lock seat and a lock head; the lock seat comprises a lock frame, a lock tongue, a button, a first elastic piece, a second elastic piece and a positioning piece; a limit cavity is formed in the lock frame, and the lock tongue is connected to the lock frame in a sliding manner; part of the structure of the button is positioned in the limiting cavity and is connected with the lock tongue; the first elastic piece is connected with the button; the second elastic piece is connected with the bolt; the locating piece is arranged on the button, and the lock frame is provided with a locating hole communicated with the limiting cavity. Through setting up the setting element to set up the button to slide in the structure of lock frame along the width direction of lock frame and along the length direction of lock frame simultaneously, will open the door fence and need press the button earlier, drive the button again and move in order to drive the spring bolt motion of connecting on the button to the rear side, keep away from and break away from the fore shaft completely until the spring bolt. Therefore, the lock tongue cannot be separated from the lock opening only by pressing the button, and the door sill is prevented from being opened by an infant when the infant touches the button unintentionally.

Description

Door sill limiting device

Technical Field

The utility model relates to the technical field of door tools, in particular to a door sill limiting device.

Background

The door sill is a piece of furniture which is commonly applied at present. The prior door fence has wide application, can be used in infant appliances and can also be used in kitchens. To prevent the door fence from being easily opened, a limiting device is usually installed on the door fence.

The existing limiting device is simple to open and close, and children easily come out from a safe closed environment to cause an unmeasured result. The potential safety hazard is great, leads to children to receive the injury easily.

SUMMERY OF THE UTILITY MODEL

The utility model solves the problem of how to improve the safety of the door sill.

In order to solve the problems, the utility model provides a door fence limiting device which comprises a lock seat and a lock head, wherein the lock seat and the lock head are respectively suitable for being connected with a door fence and a door frame;

the lock seat comprises a lock frame, a lock tongue, a button, a first elastic piece, a second elastic piece and a positioning piece;

a limiting cavity is formed in the lock frame, part of the structure of the lock tongue is suitable for penetrating through the lock frame and is connected to the lock frame in a sliding mode along the length direction of the lock frame, and the lock tongue is suitable for being clamped with the lock head;

part of the structure of the button penetrates through the lock frame and slides on the lock frame along the width direction of the lock frame and the length direction of the lock frame, and the button is connected with the lock tongue;

the first elastic piece is arranged in the limiting cavity and is suitable for being connected with the button;

the second elastic piece is arranged in the limiting cavity and is suitable for being connected with the lock tongue;

the locating part sets up on the button, the locating hole has been seted up on the lock frame relative the locating part, the locating hole is seted up along the width direction of lock frame and with spacing chamber intercommunication.

Optionally, the number of the buttons is two, the two buttons are respectively arranged on two sides of the lock frame along the width direction of the lock frame, and each end of the first elastic member is suitable for being connected with one of the buttons.

Optionally, the button includes pressing part, first joint spare and second joint spare, first elastic component sets up two between the pressing part and be suitable for with two the pressing part is connected, the setting element sets up the upside and/or the downside of pressing part, first joint spare with second joint spare sets up on the pressing part and all be suitable for to pass the lock frame is located spacing intracavity, first joint spare and second joint spare all are suitable for to follow the width direction of lock frame with lock frame sliding connection, one in the button first joint spare and another in the button second joint spare sets up relatively and is suitable for mutual lock joint, first joint spare and/or second joint spare with the spring bolt is connected.

Optionally, a clamping hole is formed in the first clamping piece, the clamping hole extends along the width direction of the lock frame, a buckle is arranged on the second clamping piece, one of the buttons is suitable for being arranged on the other of the buttons, the other of the buttons is arranged in the clamping hole, and the buckle in the button is connected to the other of the buttons in a sliding mode along the width direction of the lock frame.

Optionally, a limit groove is formed in the first clamping piece of one of the buttons relative to the second clamping piece of the other button, the limit groove is formed in the width direction of the lock frame, and the second clamping piece is suitable for being arranged in the limit groove.

Optionally, the button further includes a first limiting head, the first limiting head is disposed on one side of the pressing member close to the limiting cavity, and each end of the first elastic member is adapted to be sleeved on one of the first limiting heads.

Optionally, a baffle is arranged in the lock frame, the baffle is arranged on one side, close to the second elastic piece, of the lock bolt and is suitable for being abutted to the lock bolt, one end of the second elastic piece is suitable for being connected with the lock bolt, and the other end of the second elastic piece is suitable for penetrating through the baffle and being connected with the door sill.

Optionally, the part of the mechanism on the spring bolt, which is located in the limiting cavity, is provided with a clamping hole, and the button is suitable for penetrating through the clamping hole and clamping with the spring bolt.

Optionally, the end of the lock tongue far away from the limiting cavity is provided with a chamfer, and the chamfer is of a structure which gradually shrinks from the end close to the limiting cavity to the end far away from the limiting cavity.

Optionally, the lock holder further includes an outer lock case, the outer lock case is disposed outside the lock frame and slidably connected to the lock frame along a length direction of the lock frame, and the button is adapted to penetrate through the outer lock case.

The utility model has the technical effects that: through setting up the setting element to set up the button to follow simultaneously the width direction of lock frame with follow the length direction of lock frame slide in the structure of lock frame will divide into two parts to the step of fence unblock, and first step needs press the button earlier, makes the setting element move to spacing chamber from the locating hole, relieves the lock frame and to the location of button, and second step needs actuating button to the motion of rear side in order to drive the spring bolt motion of connecting on the button, keeps away from and breaks away from the fore shaft completely up to the spring bolt. Therefore, the lock tongue and the lock opening cannot be separated only by pressing the button, the door sill is prevented from being opened by an infant when the infant touches the button unintentionally, and the safety of the door sill limiting device is improved.

Drawings

FIG. 1 is a schematic view of a door sill according to an embodiment of the present invention;

FIG. 2 is an exploded view of a door sill according to an embodiment of the present invention;

FIG. 3 is a partial cross-sectional structural view of a door sill according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of the structure shown in FIG. 3;

FIG. 5 is a schematic structural view of the lock seat of the present invention;

FIG. 6 is a view showing a state of use of the lock housing of the present invention;

FIG. 7 is an exploded view of the lock housing of the present invention;

FIG. 8 is an exploded view of the lock housing of the present invention;

FIG. 9 is a schematic view of the button of the present invention;

fig. 10 is a sectional view taken along the line a-a in fig. 5.

Reference numerals:

1. a lock seat; 11. a lock frame; 111. a limiting cavity; 112. positioning holes; 113. a baffle plate; 12. a latch bolt; 121. a second limiting head; 122. a clamping hole; 13. a button; 131. a pressing member; 132. a first clip member; 133. a second clip member; 134. a clamping hole; 135. buckling; 136. a limiting groove; 137. a first stopper; 14. a first elastic member; 15. a second elastic member; 16. a positioning member; 17. an outer lock case; 2. a lock head; 21. locking the opening; 3. a door sill; 4. a door frame.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

XYZ coordinate axes are provided herein wherein a forward direction of the X axis represents a forward direction, a reverse direction of the X axis represents a rearward direction, a forward direction of the Y axis represents a right direction, a reverse direction of the Y axis represents a left direction, a forward direction of the Z axis represents an upward direction, and a reverse direction of the Z axis represents a downward direction.

As shown in fig. 1 to 8, an embodiment of the present invention provides a door fence limiting device, which includes a lock base 1 and a lock head 2, where the lock base 1 and the lock head 2 are respectively adapted to be connected to a door fence 3 and a door frame 4; the lock base 1 comprises a lock frame 11, a bolt 12, a button 13, a first elastic piece 14, a second elastic piece 15 and a positioning piece 16; the lock frame 11 is suitable for being arranged on the door sill 3 and is internally provided with a limiting cavity 111, part of the structure of the bolt 12 is suitable for penetrating through the lock frame 11 and is positioned in the limiting cavity 111, part of the structure of the bolt 12 is connected to the lock frame 11 in a sliding mode along the length direction of the lock frame 11, and the bolt 12 is suitable for being clamped with the lock head 2; part of the structure of the button 13 penetrates through the lock frame 11 and is positioned in the limit cavity 111, the button 13 is suitable for sliding on the lock frame 11 along the width direction of the lock frame 11 and along the length direction of the lock frame 11, and the button 13 is connected with the bolt 12; the first elastic piece 14 is arranged in the limiting cavity 111 and arranged along the width direction of the lock frame 11, and the first elastic piece 14 is positioned between the button 13 and the lock frame 11 and is suitable for being connected with the button 13; the second elastic element 15 is arranged in the limiting cavity 111 and arranged along the length direction of the lock frame 11, and the second elastic element 15 is positioned between the bolt 12 and the door sill 3 and is suitable for being connected with the bolt 12; the positioning element 16 is arranged on the button 13, a positioning hole 112 is formed in the lock frame 11 opposite to the positioning element 16, and the positioning hole 112 is formed in the width direction of the lock frame 11 and is communicated with the limiting cavity 111. Specifically, the first elastic member 14 and the second elastic member 15 may be provided as a spring, a spring sheet, an elastic rubber, or the like, and in the present embodiment, a spring is preferably used.

In this embodiment, the door frame 4 is fixed to a wall, a crib, or the like. When the door sill 3 needs to be closed in use, the button 13 positioned on the left side and/or the right side (Y-axis forward and/or reverse) of the lock frame 11 is pressed, the first elastic part 14 is compressed, and the positioning part 16 is driven to move into the limiting cavity 111 from the positioning hole 112, so that the limiting effect of the lock frame 11 on the button 13 is relieved; then, the button 13 is driven to move to the rear side (X-axis reverse), and since the button 13 is connected to the latch 12, the latch 12 is driven to move to the rear side (X-axis reverse), and the second elastic member 15 is compressed; then, the door sill 3 is closed, and the bolt 12 corresponds to the locking notch 21 on the lock head 2; finally, the button 13 is released, the first elastic part 14 and the second elastic part 15 are extended and reset, the second elastic part 15 can drive the bolt 12 to move towards the front side (X-axis forward direction) in the extension and reset process until part of the structure of the bolt 12 is clamped in the locking notch 21, so that the bolt 12 is positioned, meanwhile, the first elastic part 14 drives the positioning part 16 to return to the positioning hole 112 from the limiting cavity 111 in the extension and reset process, and the positioning part 16 is positioned by utilizing the side wall of the positioning hole 112, so that the button 13 is positioned in the front and back direction, namely, the movement in the X-axis direction. Similarly, when the door sill 3 needs to be opened, the button 13 positioned on the left side and/or the right side (the Y axis is forward and/or reverse) of the lock frame 11 is pressed, the positioning piece 16 is driven to move into the limiting cavity 111 from the positioning hole 112, and therefore the limiting effect of the lock frame 11 on the button 13 is relieved; then, the driving button 13 moves to the rear side (X-axis reverse), and since the button 13 is connected to the latch 12, the latch 12 is driven to move to the rear side (X-axis reverse) until the latch 12 is completely separated from the locking notch 21; finally, the door sill 3 is opened.

To sum up, through setting up the locating piece 16, and set up button 13 to slide in the structure of lock frame 11 along the width direction of lock frame 11 and along the length direction of lock frame 11 simultaneously, will divide into two parts to the step of door grating 3 unblock, first step needs to press button 13 earlier, makes locating piece 16 move to spacing chamber 111 from locating hole 112, relieves the location of lock frame 11 to button 13, second step needs drive button 13 to move to the rear side in order to drive the tongue 12 motion of connecting on button 13, and it is far away from and breaks away from fore shaft 21 completely to tongue 12. Therefore, the bolt 12 cannot be separated from the locking notch 21 only by pressing the button 13, the door sill 3 is prevented from being opened by an infant when the infant touches the button 13 unintentionally, and the safety of the door sill limiting device is improved.

Further, as shown in FIG. 8, the alignment holes 112 are provided in an "Contraband" configuration.

Alternatively, as shown in fig. 5 and 8, two buttons 13 are provided, two buttons 13 are respectively provided on two sides of the lock frame 11 along the width direction of the lock frame 11, two ends of the first elastic member 14 are respectively adapted to be connected with one of the buttons 13, a positioning member 16 is provided on each of the two buttons 13, and each of the two buttons 13 is adapted to be connected with the latch 12.

In the present embodiment, two buttons 13 are provided, the right button 13 is set to B, and the left button 13 is set to C. When the door sill 3 needs to be opened, the first elastic part 14 between the B and the C needs to be compressed by simultaneously pressing the B and the C on the left side and the right side (reverse and forward directions of the Y axis) of the lock frame 11, and the positioning part 16 moves into the limiting cavity 111 from the positioning hole 112, so that the limiting effect of the lock frame 11 on the button 13 is relieved; then, driving the bolts B and C to move to the rear side (X-axis reverse), and driving the bolts 12 to move to the rear side (X-axis reverse) until the bolts 12 completely disengage from the locking notches 21 because the bolts B and C are both connected with the bolts 12; finally, the door sill 3 is opened.

In summary, since the two buttons 13 are provided on the left and right sides (the Y axis is forward and backward) of the lock frame 11 and the positioning members 16 provided on the two buttons 13 are used to simultaneously position the buttons 13 and thereby position the latch 12, the two buttons 13 need to be pressed simultaneously when the door fence 3 is opened, and since a child or an infant is located only on one side of the door fence 3 and is difficult to simultaneously touch the two buttons 13, it is possible to prevent the child or the infant from simultaneously removing the positioning function of the two buttons 13 on the latch 12, thereby preventing the infant from unintentionally touching the buttons 13 to open the door fence 3, and thus improving the safety of the door fence 3. Meanwhile, when the button 13 is arranged at the upper end or the lower end of the lock frame 11, it is inconvenient to apply force to the button 13 to drive the button to move towards the rear side (in the X-axis reverse direction) so as to disengage the bolt 12 from the locking notch 21, and to subsequently apply force to the door sill 3 to push the door sill 3 open; the buttons 13 are arranged on the left side and the right side (the Y axis is forward and reverse) of the lock frame 11, so that the force can be applied to the buttons 13 and the door sill 3 conveniently, and the using effect of the door sill limiting device is improved.

Alternatively, as shown in fig. 8 and 9, the button 13 includes a pressing member 131, a first clamping member 132 and a second clamping member 133, the first elastic member 14 is disposed between the two pressing members 131 and is adapted to be connected with the two pressing members 131, the positioning member 16 is disposed on the upper side and/or the lower side of the pressing members 131, the first clamping member 132 and the second clamping member 133 are disposed on the pressing members 131 and are both adapted to pass through the lock frame 11 and are located in the limiting cavity 111, the first clamping member 132 and the second clamping member 133 are both adapted to be slidably connected with the lock frame 11 along the width direction of the lock frame 11, the first clamping member 132 in one button 13 is disposed opposite to the second clamping member 133 in another button 13 and are adapted to be fastened to each other, and the first clamping member 132 and/or the second clamping member 133 is connected with the lock tongue 12.

In this embodiment, when the button 13 is pressed, the pressing members 131 need to be acted on, the first elastic member 14 disposed between the two pressing members 131 is compressed, and drives the positioning member 16 disposed on the pressing members 131 to move from the positioning hole 112 into the limiting cavity 111; when the button 13 is released, the first elastic member 14 resets and drives the pressing member 131 to return, and the positioning member 16 is driven to move into the positioning hole 112 from the limiting cavity 111, so as to position the pressing member 131, thereby positioning the first clamping member 132, the second clamping member 133 and the lock tongue 12, because the first clamping member 132 and the second clamping member 133 are mutually fastened, after the first elastic member 14 resets, the two buttons 13 are connected through a fastening structure between the first clamping member 132 and the second clamping member 133, the position relationship between the buttons 13 and the lock frame 11 is limited by the fastening structure, and thus the buttons 13 can be prevented from being separated from the lock frame 11. Therefore, the action effect of the button 13 is ensured, and the repeated operation of the button 13 is facilitated.

Optionally, as shown in fig. 9, the first engaging member 132 is provided with an engaging hole 134, the engaging hole 134 extends along the width direction of the lock frame 11, the second engaging member 133 is provided with a catch 135, the catch 135 of one button 13 is adapted to be disposed in the engaging hole 134 of another button 13, and the catch 135 of one button 13 is slidably connected to the first engaging member 132 of another button 13 along the width direction of the lock frame 11.

In this embodiment, when the pressing member 131 is pressed, the first engaging member 132 in B and the second engaging member 133 in C move relatively, the buckle 135 moves from the left end of the clamping hole 134 to the right end of the clamping hole 134 along the length direction of the clamping hole 134, and the hole wall at the right end of the clamping hole 134 limits the buckle 135 to prevent the pressing member 131 from completely sinking into the limiting cavity 111, thereby avoiding affecting the returning of the pressing member 131. Meanwhile, when the first elastic member 14 is extended and reset, the pressing member 131 is driven to return, the buckle 135 moves from the right end of the clamping hole 134 to the left end of the clamping hole 134 along the length direction of the clamping hole 134, the hole wall at the left end of the clamping hole 134 limits the buckle 135 to prevent the pressing member 131 from completely separating from the lock frame 11, and the pressing of the pressing member 131 is prevented from being influenced. In summary, the first engaging member 132 is provided with the engaging hole 134, and the second engaging member 133 is provided with the engaging buckle 135, so that the position relationship between the pressing member 131 and the lock frame 11 can be limited, and the pressing member 131 can be operated repeatedly. Meanwhile, the clip 135 is limited by the clip hole 134, so that the first elastic member 14 is prevented from being damaged due to over-compression.

Optionally, as shown in fig. 9, a limiting groove 136 is formed on the first clamping member 132 of one of the buttons 13 relative to the second clamping member 133 of the other button 13, the limiting groove 136 is formed along the width direction of the lock frame 11, and the second clamping member 133 is adapted to be disposed in the limiting groove 136.

In this embodiment, set up the spacing groove 136 that extends along left right direction on the second joint spare 133, and set up first joint spare 132 in spacing groove 136, when first joint spare 132 and second joint spare 133 relative slip, because first joint spare 132 sets up in spacing groove 136, spacing groove 136 can carry on spacingly to the fore-and-aft direction and the vertical direction of first joint spare 132, first joint spare 132 only can be followed left right direction motion, can avoid buckle 135 to break away from card hole 134 from this, stability when having guaranteed relative slip between first joint spare 132 and the second joint spare 133.

Optionally, as shown in fig. 9, the button 13 further includes a first limiting head 137, the first limiting head 137 is disposed on one side of the pressing member 131 close to the limiting cavity 111, and each end of the first elastic member 14 is sleeved on one of the first limiting heads 137.

In this embodiment, when the first elastic element 14 is disposed between the two buttons 13, two ends of the first elastic element 14 are respectively sleeved on one of the first limiting heads 137, and the two first limiting heads 137 can limit the left and right ends of the first elastic element 14, so as to ensure the abutting action of the first elastic element 14 on the pressing element 131; meanwhile, the first elastic member 14 is located between the first clamping member 132 and the second clamping member 133, and the front side and the rear side of the first elastic member 14 can be limited. To sum up, the stability of the first elastic member 14 in the telescopic motion process can be ensured by limiting the front side, the rear side, the left side and the right side of the first elastic member 14.

Optionally, as shown in fig. 10, the lock holder 1 further includes a second limiting head 121, the second limiting head 121 is disposed on the lock tongue 12 and is close to one end of the second elastic member 15, and one end of the second elastic member 15 close to the second limiting head 121 is adapted to be sleeved on the second limiting head 121.

In this embodiment, the end of the second elastic element 15 is sleeved on the second limiting head 121, and the second limiting head 121 can limit the second elastic element 15, so as to prevent the second elastic element 15 from being separated from the bolt 12. Meanwhile, a groove is formed in the door sill 3 relative to the second elastic piece 15, so that the second elastic piece 15 is limited. In sum, the second limiting head 121 can limit the second elastic element 15, so as to ensure the driving action on the latch bolt 12 when the second elastic element 15 is reset.

Optionally, as shown in fig. 10, a baffle 113 is disposed in the lock frame 11, the baffle 113 is disposed on a side of the latch bolt 12 close to the second elastic member 15 and is adapted to abut against the latch bolt 12, one end of the second elastic member 15 is adapted to be connected to the latch bolt 12, and the other end of the second elastic member 15 is adapted to penetrate through the baffle 113 and is connected to the door sill 3.

In this embodiment, during the process of driving the latch bolt 12 to move to the left, the second elastic element 15 may be continuously compressed, which may cause the second elastic element 15 to be excessively compressed and damaged, thereby affecting the function of the second elastic element 15 to reset and drive the latch bolt 12 to return. By providing the baffle 113 in the lock frame 11, the movement of the latch 12 is stopped when the latch 12 moves to the left and abuts against the baffle 113, so that the latch 12 can be prevented from being separated from the lock opening 21 and the second elastic member 15 can be prevented from being damaged by excessive compression.

Optionally, as shown in fig. 8, a part of the mechanism of the lock tongue 12 located in the limiting cavity 111 is provided with a clamping hole 122, and the button 13 is adapted to penetrate through the clamping hole 122 and be clamped with the lock tongue 12.

In this embodiment, the first clamping member 132 may be clamped with the clamping hole 122, the second clamping member 133 may be clamped with the clamping hole 122, and the first clamping member 132 and the second clamping member 133 may be clamped with the clamping hole 122. Thereby, the latch 12 is moved by the movement of the button 13 in the left-right direction.

Optionally, as shown in fig. 5 to 8, a chamfer is provided at an end of the locking tongue 12 away from the limiting cavity 111, and at the same time, the chamfer is in a structure gradually shrinking from an end close to the limiting cavity 111 to an end away from the limiting cavity 111.

In this embodiment, when the door rail 3 is closed, the door rail 3 is directly pushed to approach the doorframe 4, and the latch 12 gradually approaches the locking notch 21. When the door sill 3 is pushed to the left side from the right side, a chamfer is arranged on the left side of the front end of the bolt 12, so that the bolt 12 can move into the locking notch 21 conveniently; similarly, when the door sill 3 is pushed from the left side to the right side, a chamfer is arranged on the right side of the front end of the bolt 12, so that the bolt 12 can move into the locking notch 21 conveniently.

Optionally, as shown in fig. 5-7, the lock holder 1 further comprises an outer lock case 17, the outer lock case 17 is disposed outside the lock frame 11 and slidably connected to the lock frame 11 along the length direction of the lock frame 11, and the button 13 is adapted to penetrate through the outer lock case 17.

In this embodiment, the button 13 is pressed until the outside of the pressing member 131 is flush with the outer lock case 17, that is, the positioning member 16 is completely immersed in the limiting cavity 111, and the outer lock case 17 is pushed to move to the left, so as to drive the button 13 and the latch 12 to move, so that the latch 12 is separated from the fore shaft 21. By providing the outer lock case 17, the area of the hand acting when the driving button 13 moves to the rear side is larger, facilitating the operation, and specifically, the outer lock case 17 may be provided with an anti-slip groove. Meanwhile, the outer lock shell 17 is arranged to protect the lock frame 11 structure, the limiting cavity 111 is sealed, and the button 13 and the bolt 12 structure are protected, so that the stability of the lock base 1 structure is guaranteed.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.

Claims (10)

1. A door fence limiting device comprises a lock seat (1) and a lock head (2), wherein the lock seat (1) and the lock head (2) are respectively suitable for being connected with a door fence (3) and a door frame (4), and the door fence limiting device is characterized in that the lock seat (1) comprises a lock frame (11), a lock tongue (12), a button (13), a first elastic piece (14), a second elastic piece (15) and a positioning piece (16);

a limiting cavity (111) is formed in the lock frame (11), part of the structure of the lock tongue (12) is suitable for penetrating through the lock frame (11) and is connected to the lock frame (11) in a sliding mode along the length direction of the lock frame (11), and the lock tongue (12) is suitable for being clamped with the lock head (2);

the button (13) is partially structured to penetrate through the lock frame (11), the button (13) is adapted to slide on the lock frame (11) along the width direction of the lock frame (11) and along the length direction of the lock frame (11), and the button (13) is connected with the bolt (12);

the first elastic piece (14) is arranged in the limiting cavity (111) and is suitable for being connected with the button (13);

the second elastic piece (15) is arranged in the limiting cavity (111) and is suitable for being connected with the lock tongue (12);

the positioning piece (16) is arranged on the button (13), a positioning hole (112) is formed in the lock frame (11) relative to the positioning piece (16), and the positioning hole (112) is communicated with the limiting cavity (111).

2. The doorsill stop according to claim 1, characterized in that there are two push buttons (13), two push buttons (13) are respectively provided on both sides of the lock frame (11) in the width direction of the lock frame (11), and each end of the first elastic member (14) is adapted to be connected to one of the push buttons (13).

3. The doorsill limit device of claim 2, wherein the buttons (13) comprise a pressing member (131), a first clamping member (132) and a second clamping member (133), the first elastic member (14) is arranged between the two pressing members (131) and is suitable for being connected with the two pressing members (131), the positioning member (16) is arranged on the pressing members (131), the first clamping member (132) and the second clamping member (133) are arranged on the pressing members (131) and are both suitable for penetrating through the lock frame (11) and positioned in the limit cavity (111), the first clamping member (132) and the second clamping member (133) are both suitable for being slidably connected with the lock frame (11) along the width direction of the lock frame (11), the first clamping member (132) in one button (13) and the second clamping member (133) in the other button (13) are arranged opposite and are mutually clamped, the first clamping piece (132) and/or the second clamping piece (133) are connected with the lock tongue (12).

4. The doorsill limit device of claim 3, wherein the first engaging member (132) is provided with an engaging hole (134), the engaging hole (134) extends along the width direction of the lock frame (11), the second engaging member (133) is provided with a catch (135), the catch (135) of one of the buttons (13) is adapted to be disposed in the engaging hole (134) of the other of the buttons (13), and the catch (135) of one of the buttons (13) is slidably connected to the first engaging member (132) of the other of the buttons (13) along the width direction of the lock frame (11).

5. A doorsill limiting device according to claim 3, characterized in that the first engaging member (132) of one of the buttons (13) is provided with a limiting groove (136) opposite to the second engaging member (133) of the other button (13), the limiting groove (136) is provided along the width direction of the lock frame (11), and the second engaging member (133) is adapted to be disposed in the limiting groove (136).

6. A doorsill stop according to claim 3, wherein the push button (13) further comprises a first stop head (137), the first stop head (137) is arranged on the pressing member (131) and adapted to be arranged at a side close to the stop cavity (111), and each end of the first elastic member (14) is fitted over one of the first stop heads (137).

7. The doorsill limit device of claim 1, wherein a baffle (113) is arranged in the lock frame (11), the baffle (113) is arranged at one side of the lock tongue (12) close to the second elastic member (15) and is suitable for abutting against the lock tongue (12), one end of the second elastic member (15) is suitable for being connected with the lock tongue (12) and the other end of the second elastic member is suitable for penetrating through the baffle (113) and being connected with the doorsill (3).

8. The doorsill limit device of claim 1, wherein a part of the mechanism of the lock tongue (12) located in the limit cavity (111) is provided with a clamping hole (122), and the button (13) is suitable for penetrating through the clamping hole (122) and clamping with the lock tongue (12).

9. The doorsill limit device of claim 1, wherein an end of the bolt (12) away from the limit cavity (111) is provided with a chamfer, and the chamfer presents a structure gradually shrinking from an end close to the limit cavity (111) to an end away from the limit cavity (111).

10. Door sill limit device according to any of the claims 1-9, characterized in that the lock bracket (1) further comprises an outer lock housing (17), which outer lock housing (17) is arranged outside the lock frame (11) and is slidably connected to the lock frame (11) in the length direction of the lock frame (11), and that the push button (13) is adapted to penetrate the outer lock housing (17).

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