CN216974690U

CN216974690U - Safety door fence

Info

Publication number: CN216974690U
Application number: CN202121524136.4U
Authority: CN
Inventors: 张醒星
Original assignee: Zhongshan Jinlang Daily Products Co ltd
Current assignee: Zhongshan Jinlang Daily Products Co ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2022-07-15
Anticipated expiration: 2031-07-06

Abstract

The utility model discloses a safety door sill, which comprises a door frame and a door sill which is hinged in the door frame and can be opened and closed and is in a grid shape, wherein a door hinge device which can enable the door sill to rotate to be opened and closed to serve as a pivot and a door locking device which can enable the door sill to be locked and fixed are arranged between the door frame and the door sill, and the door locking device is provided with two independent switches which are not linked. The upper lock catch of the button of the press slide block is opened, and the lower lock catch of the press switch handle is opened. The utility model has double locking of the upper lock catch and the lower lock catch which vertically moves, increases the unlocking difficulty of children pets when the safety door fence is opened, effectively increases the safety of the safety door fence, makes the safety door fence more stable, can open the door conveniently and rapidly by one hand, and is firm, durable and convenient to open and close.

Description

Safety door sill

Technical Field

The utility model relates to the technical field of indoor doorways, in particular to a safety doorway.

Background

Along with the economic development, the living standard of people is higher and higher, and more families for raising pets are provided; children in the family will be more and more in the future; because children and pets are not high in intelligence and are easily attracted by fresh things, the children and the pets are easy to independently enter and exit spaces such as kitchens, toilets, stairs and the like without attention, and danger is easily caused. It becomes necessary to install the safety door sill at these places.

At present, the door fence on the market is either single hasp door fence or double-hasp linkage door fence, and these door fences are many unstable, are opened by the pet of large-scale a bit or the children that imitate the ability reinforce easily, so this hasp requirement to the door fence is very high, because both need stabilize to be difficult to open by children, convenient and simple swift when adult passes in and out again, do not cause the hindrance to daily life.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a safety door sill, which overcomes the defects of insecurity, easy opening, complex structure and difficult opening and closing of a single-lock catch and a double-lock catch linkage door sill.

In order to achieve the purpose, the utility model adopts the following scheme: a safety door sill comprises a door frame and a grille-shaped door sill which is hinged in the door frame and can be opened and closed, wherein a door hinge device which can enable the door sill to rotate to be opened and closed as a pivot and a door lock catch device which can enable the door sill to be locked and fixed are arranged between the door frame and the door sill, and the door lock catch devices are two independent switches.

In a further aspect of the present invention, the door hinge device includes an upper hinge portion provided at a connection portion of the door fence and the upper left side of the door frame, and a lower hinge portion provided at a connection portion of the door fence and the lower left side of the door frame.

As a further aspect of the present invention, the door latch apparatus. The door lock comprises an upper lock catch at the joint of the door fence and the upper right of the door frame and a lower lock catch at the joint of the door fence and the lower right of the door frame.

As a further aspect of the present invention, the upper hinge portion includes a shaft hole base provided on the door frame and a rotating shaft portion provided on the adjacent door sill, the shaft hole base is vertically provided with a hollow cylindrical shaft hole and a shaft hole outer edge for bearing the shaft hole, the upper edge of the outer edge of the shaft hole is an inclined plane, the top point of the inclined plane of the upper edge of the outer edge of the shaft hole is provided with a baffle which protrudes upwards, the rotating shaft part comprises a rotating shaft, the lower edge of the rotating shaft part is provided with an inclined plane which can be matched with the inclined plane of the outer edge of the shaft hole and can be rotatably inserted into the shaft hole for rotating and opening, a groove which can be matched with the baffle to limit the rotation opening and closing angle of the rotating shaft part is arranged on the inclined plane of the lower edge of the rotating shaft, the lower hinge part comprises an inserting shaft fixed at the bottom of the door frame and a right-angle rotating shaft which is fixed at the bottom of the door sill and can be nested on the inserting shaft to rotate.

As a further proposal of the utility model, the upper lock catch comprises an upper lock catch base arranged on the door frame and a handle base arranged on the door rail and provided with an inner cavity, the top of the handle base penetrates a notch capable of being communicated with the inner cavity of the handle base, the upper lock catch base is internally provided with an upper locking groove with an upward inclined outer edge, a handle inner sleeve with a hollow cavity is movably arranged in the cavity at the end part of the handle base close to one side of the door frame, the handle inner sleeve is nested on the door rail at the right upper corner, the top of the handle inner sleeve penetrates an upper through hole capable of being communicated with the handle inner sleeve, a slide block with a cavity with the same direction is movably arranged in the cavity at one side of the handle inner sleeve close to the upper lock catch base, the front and back side wall surfaces of the slide block are respectively provided with symmetrical slopes inclined upwards and leftwards, and an upper switch locking piece capable of being inserted into the upper locking groove is movably arranged in the cavity of the slide block, the slider top activity is equipped with and drives this slider to the slider button that contracts back in the handle inner tube, and this slider button activity sets up in the scarce groove the slider button is kept away from upper lock base one end front and back both sides and extends and have a cylindric articulated buckle of symmetry, and this articulated buckle articulates in the handle inner tube is sheathe in, the vertical downward front and back symmetry in slider button below is equipped with can pass the long ear of button of last through-hole, the one end of the long ear of this button towards ground has the inclined plane with slider side slope matched with.

As a further scheme of the utility model, the lower lock catch comprises a lower locking base arranged on the door frame and a switch fixing piece arranged on the door sill, the switch fixing piece is provided with a fixing piece cavity which is vertically upward and internally provided with a cavity with a downward opening, the fixing piece cavity is provided with a fixing piece through hole penetrating through the cavity, a lower switch locking piece is movably arranged in the cavity of the fixing piece cavity, one end of the lower switch locking piece facing the ground is provided with a lower lock tongue which vertically extends downward, the middle of the lower locking base is provided with a lower locking groove capable of locking the lower lock tongue, the door sill is internally provided with a pull wire of which the tail end is connected with the head end of the lower switch locking piece, and a switch handle capable of pulling the pull wire is movably arranged in the inner cavity of the handle base at one end far away from the slide block.

As a further scheme of the utility model, at least one of the front side and the rear side of the upper locking groove is provided with an inner concave inclined surface, and one surface of the upper switch locking piece, which is close to the upper lock catch base, is provided with an upper lock tongue which can be matched with the inner concave inclined surface to extrude and guide the upper switch locking piece to retract into a cavity of the slider.

As a further aspect of the present invention, a slider locking hole penetrates through the upper end surface of the slider, and an upper locking catch that is movably engaged with the slider locking hole and prevents the upper switch locking member from being disengaged from the slider when the door fence is opened is disposed at the upper end of the upper switch locking member, and the upper locking catch is movably disposed in the slider locking hole.

As a further scheme of the utility model, a bolt is fixed transversely at one end of the traction wire far away from the lower switch locking piece, strip-shaped holes capable of accommodating two ends of the bolt to extend out are formed in two side wall surfaces of the door sill where the bolt is located, a right long lug symmetrically extends out of one end of the switch handle, and the two right long lugs are respectively supported below the front end part and the rear end part of the bolt.

As a further scheme of the utility model, return springs are respectively arranged between the switch handle and the door sill, between the handle inner sleeve and the sliding block, between the sliding block and the upper switch locking piece, and between the switch fixing piece and the lower switch locking piece.

In summary, the utility model has double locking of the upper lock catch and the vertically moving lower lock catch, and the two lock catch switches are independent and not linked with each other. The long lug of the button extrudes the sliding block by pressing the button of the sliding block with a thumb, so that the upper locking tongue is separated from the upper locking groove, and the upper lock catch is opened. Other fingers press the switch handle to pull out the lower switch locking piece, so that the lower lock catch is opened to push the door sill to be opened. Because two switches do not link, increased the degree of difficulty of children's unblock when opening the security door fence, the effectual security that increases the security door fence makes the security door fence more firm, and convenient and fast one-hand both can open the door, and is sturdy and durable, the convenience is opened and shut.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is an exploded view of the upper latch of the present invention.

Figure 4 is an exploded view of the upper hinge of the present invention.

Fig. 5 is an exploded view of the lower latch of the present invention.

Fig. 6 is an enlarged cross-sectional view of the upper latch at a in fig. 2.

Fig. 7 is an enlarged cross-sectional view of the upper latch at B in fig. 2.

Description of reference numerals: 10. a door hinge assembly; 11. a door latch device; 101. a door sill; 102. a door frame; 103. an upper hinge portion; 104. a shaft hole base; 105. a rotating shaft part; 106. locking a lock catch; 107. a handle base; 1071. notching; 108. a slider button; 109. mounting a lock catch base; 110. A lower hinge section; 111. a lower lock catch; 112. a switch firmware; 1121. a firmware cavity; 113. a lower locking base; 201. clamping and buckling; 202. a switch handle; 203. a handle inner sleeve; 204. A slider; 2041. a slope; 205. an upper switch lock; 206. a shaft hole; 207. blocking; 208. a shaft hole bottom cover; 209. a rotating shaft; 210. a groove; 211. a lower switch locking member; 212. a lower locking groove; 213. a through-hole for the fastener; 214. a locking bevel; 215. the outer edge of the shaft hole; 301. an upper through hole; 302. a sliding block lock hole; 303. the buckle is hinged; 304. a button long lug; 305. locking the buckle; 306. an upper lock tongue; 307. an upper locking groove; 308. a lower lock tongue; 309. a locking through hole; 310. an inner concave slope; 311. a right long ear; 312. a left long ear; 313. a long locking lug; 314. inserting a shaft; 315. a button is buckled; 401. a pull wire; 402. a first rail; 403. a bolt; 1101. A right-angle rotating shaft.

Detailed Description

The following detailed description provides many different embodiments or examples for implementing the utility model. Of course, these are merely embodiments or examples and are not intended to be limiting. In addition, repeated reference numbers, such as repeated numbers and/or letters, may be used in various embodiments. These iterations are for simplicity and clarity of describing the present invention and are not intended to represent a particular relationship between the various embodiments and/or configurations discussed.

Furthermore, spatially relative terms, such as "below" … "," below "," inside-out "," above "," upper "and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature during use or operation of the device, and may include different orientations of the device during use or operation of the device as illustrated in the figures. The devices may be rotated 90 degrees or other orientations from different orientations and the spatially relative descriptors used therein should be interpreted as such and are not to be construed as limiting the utility model, and the terms "first" and "second" are used for descriptive purposes only and are not intended to indicate or imply relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The utility model will be further described with reference to the following description and embodiments in conjunction with the accompanying drawings: as shown in fig. 1 to 7, the safety door fence includes a door frame 102 and a grille-shaped door fence 101 hinged in the door frame 102, wherein the door frame 102 on one side is connected to the door frame 102 by a door hinge 10, and a door locking device 11 capable of locking the door fence 101 and not capable of opening is arranged between the door frame 102 and the door fence 101 on the side far away from the door hinge 10. The door hinge device 10 includes an upper hinge portion 103 provided at a connection portion of the door sill 101 and the upper left of the door frame 102, and a lower hinge portion 110 provided at a connection portion of the door sill 101 and the lower left of the door frame 102. The door lock device 11 includes an upper lock 106 at a joint of the door sill 101 and the upper right of the door frame 102 and a lower lock 111 at a joint of the door sill 101 and the lower right of the door frame 102.

In this embodiment, please refer to fig. 1, fig. 2 and fig. 4, the upper hinge portion 103 includes a shaft hole base 104 disposed on the door frame 102 and a rotating shaft portion 105 disposed on the door sill 101, the shaft hole base 104 is vertically provided with a hollow cylindrical shaft hole 206 and a shaft hole outer edge 215 for bearing the shaft hole 206, an upper edge of the shaft hole outer edge 215 is an inclined surface, an upward protruding baffle 207 is disposed at a top point of the upper edge inclined surface of the shaft hole outer edge 215, a shaft hole bottom cover 208 is disposed below the shaft hole base 104, the rotating shaft portion 105 includes an inclined shaft outer edge 215 and a rotating shaft 209 at a lower edge, the lower edge of the rotating shaft outer edge 215 is provided with an inclined surface, the inclined shaft outer edge 215 and the rotating shaft 209 are capable of being matched with the baffle 207 to limit a rotating opening and closing angle of the rotating shaft portion 105, and the rotating shaft 209 can be rotatably inserted into a hollow cavity of the shaft hole 206 for rotating and opening and closing. The lower hinge portion 110 includes a vertical insertion shaft 314 fixed to the bottom of the door frame 102 and a right-angle rotation shaft 1101 fixed to the bottom of the door sill 101 and capable of being nested on the insertion shaft 314 for rotation.

In the present embodiment, please refer to fig. 1 and 3, the upper latch 106 includes an upper latch base 109 disposed on the door frame 102 and a handle base 107 disposed on the door sill 101 and having an inner cavity, a slot 1071 is formed through a top of the handle base 107 and is capable of communicating with the inner cavity of the handle base 107, an upper latch groove 307 having an upwardly inclined outer edge is formed in the upper latch base 109, and at least one of front and rear sides of the upper latch groove 307 is provided with an inner concave slope 310. A handle inner sleeve 203 with a hollow cavity is movably arranged in the cavity at the end part of the handle base 107 close to the door frame 102, two symmetrical upper through holes 301 which are directly communicated with the cavity are arranged at the top end of the handle inner sleeve 203 close to the upper lock catch base 109, and a switch handle 202 and a clamp 201 are embedded in the cavity of the handle base 107 below the handle inner sleeve 203. The switch handle 202 is provided with a right long ear 311 extending symmetrically at one end close to the upper lock catch base 109, and a left long ear 312 extending symmetrically in a semicircular arc shape at one end close to the clamp catch 201. One end of the clamp 201 close to the switch handle 202 is provided with a lock catch long lug 313 which is matched with the left long lug 312 to fix the switch handle 202 on the door sill 101 and the handle base 107, so that the switch handle 202 moves up and down with a certain opening and closing angle, and one end of the clamp 201 far away from the switch handle 202 is fixed on the door sill 101. A slider 204 having a cavity, symmetrical slopes 2041 inclined upward and backward is disposed on the front and rear sides of the cavity, and a slider locking hole 302 is disposed at the upper end of the slider 204, and is movably disposed in the cavity at one end of the handle inner sleeve 203 close to the upper lock catch base 109. The upper end of the slider 204 is provided with a slider button 108, and the slider button 108 is movably arranged in the notch 1071. The end of the sliding block button 108 close to the upper lock catch base 109 is provided with a button buckle 315 which extends and protrudes and can move up and down in a gap between the cavity of the handle base 107 and the handle inner sleeve 203, the front side and the rear side of the end of the sliding block button 108 far away from the upper lock catch base 109 are provided with cylindrical hinged buckles 303 which extend symmetrically, the upper end of the handle inner sleeve 203 is provided with a groove matched with the hinged buckles 303 to movably fix the hinged buckles 303 between the cavity of the handle inner sleeve 203 and the cavity of the handle base 107, the lower part of the sliding block button 108 is provided with a long button lug 304 which is symmetrical, vertical and downward in front and rear directions and provided with an inclined plane matched with a side slope 2041 of the sliding block 204 at one end facing the ground, and the long button lug 304 passes through the upper through hole 301 and extends into the cavity of the handle inner sleeve 203 to be contacted with the side slope 2041 of the sliding block 204. An upper switch locking piece 205 is movably arranged in the cavity of the sliding block 204, one end of the upper switch locking piece 205, which is close to the upper lock catch base 109, is provided with an upper lock tongue 306 which is matched with the upper lock groove 307, and the upper end of the upper switch locking piece 205 is provided with an upper lock catch 305 which is movably matched with the sliding block lock hole 302 and is used for preventing the upper switch locking piece 205 from being separated from the sliding block 204 when the door sill 101 is opened.

Reset springs are respectively arranged between the switch handle 202 and the door sill 101, between the handle inner sleeve 203 and the sliding block 204, and between the sliding block 204 and the upper switch locking piece 205. When the slider button 108 is pressed down to press the slider 204 downward by the button long ear 304, since the contact surfaces of the two are inclined surfaces with slopes, the pressing slider 204 is translated leftward to compress the return spring, the wall surface of the slider lock hole 302 presses the upper lock catch 305 to pull the upper switch lock 205 out of the upper lock groove 307, and the upper lock catch 106 is opened. When the door sill 101 is closed, the concave slope 310 presses the upper latch tongue 306 to compress the return spring, and when the upper latch tongue 306 moves into the upper latch groove 307, the return spring returns to push the upper latch tongue 306 into the upper latch groove 307, so that the upper latch 106 is latched.

In this embodiment, please refer to fig. 1 and fig. 2 and fig. 5, the lower lock 111 includes a lower lock base 113 disposed on the door frame 102 and a vertical hollow switch fastener 112 disposed on the door sill 101, the switch fastener 112 is provided with a fastener cavity 1121 having a cavity opening downward in the vertical upward direction, the fastener cavity 1121 is provided with a fastener through hole 213 penetrating through the cavity, a lower switch lock 211 is movably disposed in the cavity of the fastener cavity 1121, the upper end of the fastener cavity 1121 is provided with a lock through hole 309 having left and right side surfaces penetrating through and communicating with the vertical upward slot to the upper end surface, and one end of the lower switch lock 211 facing the ground is provided with a lower lock tongue 308 extending vertically downward. A rectangular lower locking groove 212 is formed in the middle of the lower locking base 113, and a locking inclined surface 214 inclined upward toward the middle is formed around the lower locking groove 212. A return spring is arranged between the upper inner wall of the cavity of the switch fixing piece 112 and the lower switch locking piece 211. Be equipped with the pull wire 401 that one end can connect lower switch locking piece 211 afterbody locking through-hole 309 in first railing 402, the fixed bolt 403 that has violently put and can move about from top to bottom of the one end of keeping away from lower switch locking piece 211 at pull wire 401, be equipped with the bar hole that can hold bolt 403 both ends to stretch out at the both sides wall face of this bolt 403 place first railing 402, the right long ear 311 of switch handle 202 bears both ends portion below around bolt 403 respectively. When the switch handle 202 is pushed upwards, the right long lug 311 presses the latch 403, the latch 403 moves upwards to pull the pull wire 401, the pull wire 401 pulls the lower switch locking piece 211, the lower switch locking piece 211 compresses the return spring, the lower switch locking piece 211 moves upwards to enable the lower latch tongue 308 to be separated from the lower locking groove 212, and the lower latch 111 is opened. At this time, the upper lock catch 106 is opened, and the door sill 101 is pushed to be opened. When the lower lock catch 111 needs to be closed, the door sill 101 is directly pushed, the locking inclined surface 214 presses the lower lock tongue 308, the lower switch locking piece 211 is pushed to upwards compress the return spring, when the lower lock tongue 308 passes through the lower locking groove 212, the return spring returns to push the lower lock tongue 308 to be inserted into the lower locking groove 212, and the lower lock catch 111 is locked.

In summary, as shown in fig. 1 to 6, the present invention has dual locking of the upper latch 106 and the vertically moving lower latch 111, and the two latch switches are independent and do not link with each other. The upper latch 106 is opened by pressing the slider button 108 with the thumb to disengage the upper latch tongue 306 from the upper latch groove 307. The other fingers press the switch handle 202 to pull out the lower switch lock 211, and the lower latch 111 is opened to push the door sill 101 to open. Because two switches do not link, increased the degree of difficulty of children's unblock when opening the security door fence, the effectual security that increases the security door fence makes the security door fence more firm, and convenient and fast one-hand both can open the door, and is sturdy and durable, the convenience is opened and shut.

While there have been shown and described the fundamental principles and principal features of the utility model and advantages thereof, it will be understood by those skilled in the art that the utility model is not limited by the embodiments described above, which are given by way of illustration of the principles of the utility model, but is susceptible to various changes and modifications without departing from the spirit and scope of the utility model as defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a safe door grating, is the door grating (101) that is latticed that can open and shut including door frame (102) and articulate in door frame (102), its characterized in that: a door hinge device (10) which can enable the door fence (101) to rotate to open and close to serve as a hinge and a door lock catch device (11) which can enable the door fence (101) to be locked and fixed are arranged between the door frame (102) and the door fence (101), and the door lock catch devices (11) are two independent switches.

2. A security door hurdle according to claim 1, characterized in that the door hinge means (10) comprises an upper hinge part (103) at the upper left connection of the door hurdle (101) to the door frame (102) and a lower hinge part (110) at the lower left connection of the door hurdle (101) to the door frame (102).

3. A safety door hurdle according to claim 1, wherein the door locking device (11) comprises an upper catch (106) at the upper right connection of the door hurdle (101) to the door frame (102) and a lower catch (111) at the lower right connection of the door hurdle (101) to the door frame (102).

4. The safety door sill according to claim 2, characterized in that the upper hinge part (103) comprises a shaft hole base (104) arranged on the door frame (102) and a rotating shaft part (105) arranged adjacent to the door sill (101), the shaft hole base (104) is vertically provided with a hollow cylindrical shaft hole (206) and a shaft hole outer edge (215) bearing the shaft hole (206), the upper edge of the shaft hole outer edge (215) is an inclined surface, the top of the upper edge inclined surface of the shaft hole outer edge (215) is provided with a baffle (207) protruding upwards, the rotating shaft part (105) comprises a rotating shaft (209) with a lower edge provided with an inclined surface which can be matched with the inclined surface of the shaft hole outer edge (215) and can be rotatably inserted into the shaft hole (206) to be rotatably opened and closed, the lower edge inclined surface of the rotating shaft (209) is provided with a groove (210) which can be matched with the baffle (207) to limit the rotating opening and closing angle of the rotating shaft part (105), the lower hinge part (110) comprises an inserting shaft (314) fixed at the bottom of the door frame (102) and a right-angle rotating shaft (1101) which is fixed at the bottom of the door sill (101) and can be nested on the inserting shaft (314) to rotate.

5. A safety door hurdle according to claim 3, wherein the upper lock catch (106) comprises an upper lock catch base (109) arranged on the door frame (102) and a handle base (107) arranged on the door hurdle (101) and having an inner cavity, the top of the handle base (107) penetrates a slot (1071) capable of communicating with the inner cavity of the handle base (107), the upper lock catch base (109) is internally provided with an upper locking groove (307) with an upward inclined outer edge, the cavity of the handle base (107) close to one side end of the door frame (102) is movably provided with a handle inner sleeve (203) also having a hollow cavity, the handle inner sleeve (203) is nested on the door hurdle (101) at the upper right corner, the top of the handle inner sleeve (203) penetrates an upper through hole (301) capable of communicating with the handle inner sleeve (203), and the cavity of the handle inner sleeve (203) close to one side of the upper lock catch base (109) is also movably provided with a handle inner sleeve (203) A sliding block (204) with a cavity opening in the same direction, wherein the front and back side wall surfaces of the sliding block (204) are respectively provided with a symmetrical slope (2041) inclining upwards and leftwards, an upper switch locking piece (205) capable of being inserted into the upper locking groove (307) is movably arranged in the cavity of the sliding block (204), a sliding block button (108) capable of driving the sliding block (204) to retract towards the inner handle sleeve (203) is movably arranged above the sliding block (204), the sliding block button (108) is movably arranged in the notch (1071), symmetrical cylindrical hinged buckles (303) extend from the front and back sides of one end, far away from the upper lock catch base (109), of the sliding block button (108), the hinged buckles (303) are hinged on the inner handle sleeve (203), and button long lugs (304) capable of penetrating through the upper through hole (301) are vertically, downwards, longitudinally and symmetrically arranged below the sliding block button (108), the end of the long lug (304) of the button facing the ground is provided with a slope surface matched with the side slope (2041) of the sliding block (204).

6. The safety door sill according to claim 5, characterized in that the lower lock catch (111) comprises a lower lock base (113) arranged on the door frame (102) and a switch fastener (112) arranged on the door sill (101), the switch fastener (112) is provided with a fastener cavity (1121) which is vertically upward and has a cavity with a downward opening, the fastener cavity (1121) is provided with a fastener through hole (213) penetrating through the cavity, a lower switch locking member (211) is movably arranged in the cavity of the fastener cavity (1121), one end of the lower switch locking member (211) facing the ground is provided with a lower lock tongue (308) vertically extending downward, a lower lock groove (212) capable of locking the lower lock tongue (308) is arranged in the middle of the lower lock base (113), and a pull wire (401) with a tail end connected with a head end of the lower switch locking member (211) is arranged in the door sill (101), a switch handle (202) capable of lifting the pull wire (401) is movably arranged in an inner cavity at one end of the handle base (107) far away from the sliding block (204).

7. A safety door sill according to claim 5, characterized in that at least one of the front and rear sides of the upper locking groove (307) is provided with a concave slope (310), and an upper locking tongue (306) capable of guiding and retracting the upper switch locking piece (205) into the cavity of the slider (204) by being matched with the concave slope (310) is arranged on the side of the upper switch locking piece (205) close to the upper lock catch base (109).

8. A safety door sill according to claim 5, characterized in that a slider locking hole (302) is formed through the upper end surface of the slider (204), an upper locking catch (305) is provided at the upper end of the upper switch locking member (205) and is movably engaged with the slider locking hole (302) to prevent the upper switch locking member (205) from being disengaged from the slider (204) when the door sill (101) is opened, and the upper locking catch (305) is movably disposed in the slider locking hole (302).

9. The safety door sill according to claim 6, characterized in that a bolt (403) is fixed and transversely arranged at one end of the pull wire (401) far away from the lower switch locking piece (211), strip-shaped holes capable of allowing two ends of the bolt (403) to extend out are arranged on two side wall surfaces of the door sill (101) where the bolt (403) is located, a right long lug (311) symmetrically extends from one end of the switch handle (202), and the two right long lugs (311) are respectively supported below the front end and the rear end of the bolt (403).

10. A safety door hurdle according to claim 6, wherein return springs are provided between the switch handle (202) and the door hurdle (101), between the handle inner sleeve (203) and the slider (204), between the slider (204) and the upper switch locking member (205), and between the switch fastener (112) and the lower switch locking member (211), respectively.