CN112963055A

CN112963055A - Door lock capable of automatically limiting bolt

Info

Publication number: CN112963055A
Application number: CN202110133985.5A
Authority: CN
Inventors: 薛红涛; 丁殿勇
Original assignee: Jiangsu University
Current assignee: Shenzhen Espe Technology Co ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-06-15
Anticipated expiration: 2041-02-01
Also published as: CN112963055B

Abstract

The invention discloses a door lock capable of automatically limiting a lock tongue.A movable magnet is arranged right on the right side of a fixed magnet, a driving wedge block extending downwards is arranged below a driving rod, a wedge-shaped mechanism is formed when the driving wedge block is contacted with a wedge surface at the upper end of a longitudinal rack below the driving wedge block, the lower end of the longitudinal rack is meshed with a gear, the gear is meshed with a transverse rack, and the left end of the transverse rack is rigidly connected with the right end of the movable magnet; the rear end face of the transverse rack is provided with a large wedge, the upper section of the rotating buckle plate is provided with a limiting block extending forwards, the front side face of the lower section of the rotating buckle plate is provided with a small wedge extending forwards, a wedge-shaped mechanism is formed when the small wedge is in contact with the large wedge, and the left section of the limiting plate is provided with a rectangular limiting groove which is communicated from front to back and can be matched with the limiting block; when the door is closed, the transverse rack moves by utilizing the principle that like poles of magnets repel each other, the buckling state of the rotary buckle plate and the limiting plate is relieved, and the spring bolt is popped out to realize the door closing.

Description

Door lock capable of automatically limiting bolt

Technical Field

The invention relates to a lockset, in particular to a door lock capable of manually opening and closing a door, which can automatically limit the position of a bolt so that the bolt is not exposed outside the door when the door is opened.

Background

The common household indoor door lock in daily life is mostly opened by a rotary handle and is designed in a pure mechanical mode. Compared with an outdoor door lock, the safety performance requirement of the indoor door lock is lower, and the use performance of the indoor door lock is usually more emphasized. The bolt of mechanical lock all is outstanding to expose outside the door after opening the door, and the bolt that often can take place to scrape with outstanding bolt when personnel walk, leads to skin scratch or clothing damage, and is more common when the user carries article especially. For example, in a lock body disclosed in a document named as 'a silent lock body with a magnet' with Chinese patent number 201410191484.2, the effect of directly sucking out a lock tongue under the action of magnetic force to complete the action of locking a door is realized, but the door can be opened by overcoming the mutual attraction of the magnet when the door is opened, and when a user carries an iron object, the magnet in the lock tongue can be popped up due to the mutual attraction of the magnet and the iron object, so that the limit of the lock tongue cannot be ensured.

Disclosure of Invention

The invention aims to solve the problem that a bolt is popped out after an existing household indoor door lock is opened, and personnel and the bolt are scratched, and provides a limitable bolt door lock which is simple in structure and good in stability.

In order to realize the technical problems, the invention adopts the following technical scheme: the lock comprises a lock body, a lock bolt baffle plate, a lock bolt return spring, a lock bolt buckle, a lock bolt, a cam stop lever, a lock bolt return spring, a lock; a fixed magnet is fixedly embedded in the lower part of the buckle box, a moving magnet generating repulsion with the fixed magnet is arranged right side of the fixed magnet, and the lower half part of the lock tongue baffle is connected with the left end of the limiting plate through a T-shaped rod; a driving wedge block extending downwards is arranged below the driving rod, and a wedge-shaped mechanism is formed when the driving wedge block is contacted with a wedge surface at the upper end of the longitudinal rack below the driving wedge block; the longitudinal rack is vertical up and down, the lower end of the longitudinal rack is meshed with the gear, the gear is meshed with the horizontal rack which is horizontal left and right, and the left end of the horizontal rack is rigidly connected with the right end of the moving magnet; a large wedge block extending backwards is arranged on the rear end face of the transverse rack, and a rotary buckle plate is arranged on the rear side of the large wedge block; the upper section of the rotating buckle plate is provided with a limiting block extending forwards, the middle section of the rotating buckle plate penetrates through the small positioning rod and can rotate around the small positioning rod forwards and backwards, the small positioning rod is fixedly connected to the square lock box, the rear side surface of the lower section of the rotating buckle plate is fixedly connected to the square lock box through buckle plate springs horizontally arranged forwards and backwards, the front side surface of the lower section of the rotating buckle plate is provided with a small wedge block extending forwards, and a wedge-shaped mechanism is formed when the small wedge block is in contact with the large wedge block; the limiting plate is arranged on the front side of the limiting block, and a rectangular limiting groove which is communicated from front to back and can be matched with the limiting block is arranged on the left section of the limiting plate; the baffle spring is arranged in the front-back direction, the front end of the baffle spring is rigidly connected with the lower half part of the lock tongue baffle, and the rear end of the baffle spring is rigidly connected with the limiting plate.

When the handle is rotated and the door is pushed, the driving rod, the lock tongue buckle, the lock tongue baffle and the lock tongue horizontally move rightwards, the wedge-shaped block is driven to be not in contact with the wedge-shaped upper end of the longitudinal rack in the moving process, the wedge-shaped block is just in contact with the wedge-shaped upper end of the longitudinal rack after the movement is finished, and the limiting plate is embedded into the limiting through groove of the limiting plate; when the handle is rotated continuously, the wedge-shaped block is driven to drive the longitudinal rack to move, the movable magnet moves leftwards to a limit position which is flush with the left side face of the square lock box, the large wedge-shaped block drives the small wedge-shaped block to move backwards, and the limiting block is embedded in the limiting through groove of the limiting plate; when the handle is released, the handle returns.

When closing the door, removal magnet receives the repulsion force horizontal migration right of fixed magnet, and big wedge is fast staggers with little wedge, and rotatory buckle receives buckle spring's elasticity to resume to initial position, and the stopper withdraws from spacing logical groove on the limiting plate, and the spring bolt baffle is promoted the spring bolt and is popped out left by spring bolt return spring's elasticity, and the actuating lever moves left, and whole mechanism resumes to the position state before opening the door.

After the technical scheme is adopted, the invention has the beneficial effects that:

compared with the traditional door lock, the door lock is additionally provided with the limiting mechanism. When the door is opened, the driving mechanism drives the limiting mechanism, so that the rotating buckle plate is buckled with the limiting plate, the spring bolt is limited to be popped out and always in a contraction state in the whole door opening state, and the spring bolt is retracted in the door lock after the door is opened; when the door is closed, the transverse rack is transversely moved along the designated direction by utilizing the principle that like poles of magnets repel each other, the buckling state of the rotary buckle plate and the limiting plate is relieved, and the lock tongue can be popped out under the elastic force of the lock tongue return spring to close the door. The problem of traditional mechanical lock the spring bolt still be in outdoors after opening the door, personnel self or clothing probably take place to scratch with the spring bolt when the process, cause unnecessary loss is overcome, set up spacing clearance simultaneously and need not to overcome the interact power of magnet and can accomplish the action of opening the door, can not make the spring bolt pop out because of the attraction of iron article after opening the door yet, reached better protection effect.

Drawings

The invention is described in further detail below with reference to the following figures and detailed description:

FIG. 1 is a front view of a door lock with an automatic deadbolt restraint in the closed position;

fig. 2 is a schematic view of the internal structure of the square lock case 1 and the buckle case 19 in fig. 1;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 5 is a front view of a door lock with an automatic deadbolt restraint in the open position;

fig. 6 is a schematic view of the internal structure of the square lock case 1 and the buckle case 19 in fig. 5;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6;

FIG. 8 is a cross-sectional view taken along line D-D of FIG. 6;

fig. 9 is an enlarged 45 ° isometric view of the deadbolt 2, deadbolt cover 3 and deadbolt buckle 5 assembly of fig. 2;

fig. 10 is an enlarged 135 isometric view of the deadbolt 2, deadbolt cover 3 and deadbolt buckle 5 assembly of fig. 2;

fig. 11 is a 45 ° enlarged isometric view of the drive mechanism of fig. 1.

In the figure: 1. a square lock box; 1a, a large positioning rod; 1b, a small positioning rod; 2. a latch bolt; 3. a deadbolt guard; a T-shaped slot; 4. a bolt return spring; 5. a lock tongue buckle; 5a, buckling a through groove with a lock tongue; 6. blocking the box; 7. a drive rod; 7a, a cam stop lever; 7b, driving the wedge-shaped block; 7c, a clasp; 7d, long grooves of the driving rod; 8. a drive cam; 9. a square core; 10. a longitudinal rack; 11. a gear; 12. a transverse rack; 12a. a large wedge; 13. moving the magnet; 14. fixing a magnet; 15. rotating the buckle plate; 15a, a limiting block; 15b, small wedge-shaped blocks; 16. a limiting plate; a T-bar; 18. a baffle spring; 19. buckling a box; 20. a handle; 20a, a handle rectangular plate; 21. a handle spring; 22. and a buckle spring.

Detailed Description

To facilitate understanding of the arrangement orientation of the components, it is defined that the spring bolt ejecting direction in fig. 1 is "left", the reverse direction is "right", the buckle box 19 is on the left side of the square lock box 1, the driving rod 7 is "up", the longitudinal rack 10 is "down", the direction perpendicular to the paper surface is "front", and the reverse direction is "back".

As shown in fig. 1 and 2, the door lock capable of automatically limiting the bolt of the present invention includes a fixing mechanism, a moving mechanism, a driving mechanism and a limiting mechanism. Wherein, the fixing mechanism comprises a buckle box 19, a fixed magnet 14, a square lock box 1 and a baffle box 6. The moving mechanism comprises a bolt 2, a bolt baffle 3, a bolt return spring 4 and a bolt buckle 5. The driving mechanism comprises a handle 20, a square core 9, a driving cam 8, a driving rod 7 and a handle spring 21. Referring to fig. 3 again, the limiting mechanism includes a longitudinal rack 10, a gear 11, a transverse rack 12, a moving magnet 13, a rotary buckle 15, a buckle spring 22, a limiting plate 16, a T-shaped rod 17, and a baffle spring 18.

The box 19 that detains among the fixed establishment inlays on the door frame, and its upper portion is equipped with the square groove of opening towards spring bolt 2 towards the right side, and the right side is spring bolt 2, and spring bolt 2 is arranged along left right direction, and square groove can cooperate with spring bolt 2, thereby spring bolt 2 moves left and can stretch in square groove and lock the door. A fixed magnet 14 is fixedly embedded in the lower part of the buckle box 19, a moving magnet 13 is arranged right to the right side of the fixed magnet 14, and the moving magnet 13 and the fixed magnet 14 have the same polarity and can generate mutual repulsive force with the fixed magnet 14.

Square lock box 1 among the fixed establishment is fixed to be inlayed in the door, and square lock box 1 is hollow structure, and inside upper portion left side is fixed to be provided with and keeps off box 6, keeps off box 6 left side and square lock box 1 rigid connection, keeps off that 6 insides of box are hollow, and the right side does not link to each other with any part and is provided with logical groove on the right flank, makes things convenient for spring bolt buckle 5 and actuating lever 7 to stretch into and stretch out. Referring to fig. 9 and 10, the right end of the bolt 2 is rigidly connected to the upper half of the bolt shield 3, the right side of the upper half of the bolt shield 3 is provided with a bolt buckle 5, the upper half of the bolt shield 3 is rigidly connected to bolt buckles 5 arranged in the left-right direction, the bolt buckles 5 are rectangular, and bolt buckle through grooves 5a penetrating in the front and back are formed in the bolt buckles 5. The left end of the driving rod 7 is detachably connected with the bolt buckle 5, the driving rod 7 is horizontally arranged left and right, and the left end of the driving rod 7 is clamped in the bolt buckle through groove 5a and detachably buckled with the bolt buckle 5. The spring bolt buckle 5 is sleeved with a spring bolt return spring 4, and the spring bolt return spring 4 is positioned inside the baffle box 6 and sleeved on the spring bolt buckle 5 with a gap. The left end of the spring bolt return spring 4 is rigidly connected with the spring bolt baffle 3, the right end of the spring bolt return spring is rigidly connected with the right side surface of the retaining box 6, and the retaining box 6 facilitates the fixation of the right end of the spring bolt return spring 4 and the movement of the driving mechanism. In the door closing state, the bolt 2 extends into the buckle box 19, and the bolt return spring 4 is in the original state.

Referring to fig. 9 and 10, the upper half of the latch bolt baffle 3 is a plate-shaped structure and is located inside the baffle box 6, the lower half of the latch bolt baffle 3 extends downward below the baffle box 6, the lower half of the latch bolt baffle 3 is an L-shaped structure, the L-shaped structure is composed of a vertical plate and a horizontal plate, the vertical plate extends downward from the upper half of the latch bolt baffle 3, the horizontal plate extends in the left-right direction, a T-shaped groove 3a with an opening facing the right is formed in the vertical plate of the L-shaped structure, a T-shaped rod 17 is connected in the T-shaped groove 3a, the lower half of the latch bolt baffle 3 is connected with the left end of the T-shaped rod 17 through the T-shaped groove, and the right end of.

As shown in fig. 1 and 11, the front and rear outer portions of the square lock case 1 are the knobs 20 in the driving mechanism, one knob 20 is provided on each of the front and rear outer portions of the square lock case 1, and the front and rear knobs 20 are arranged in a plane-symmetric manner with respect to the front and rear outer portions of the square lock case 1.

A vertical handle rectangular plate 20a arranged in the front-rear direction is provided below each handle 20 for connecting a handle spring 21. The left and right sides of handle rectangular plate 20a respectively has the handle spring 21 that the level was arranged about one, and this handle rectangular plate 20a of handle spring 21 one end rigid connection, other end rigid connection are in square lock box 1. There are thus a total of four handle springs 21, and when the handle 20 is not rotated manually, the handle springs 21 are all in the original state. There is a square core 9 rigidly connected between two handles 20, and the level is arranged around the square core 9, and handle 20 of each rigid connection in both ends, square core 9 pass the circular logical groove that corresponds on the side around square lock box 1, and when rotating handle 20, drive square core 9 and rotate.

The left end of the driving rod 7 is a hook 7c bent forwards and clamped in the bolt buckling groove 5a through the hook 7c. A driving rod long groove 7d which is penetrated through from front to back is formed in the right section of the driving rod 7, the driving rod long groove 7d is horizontally arranged from left to right, and the length direction of the driving rod long groove 7d is along the left-right direction. The middle section of the square core 9 passes through the long driving rod groove 7d. And the front side and the rear side of the long groove 7d of the driving rod are respectively provided with a driving cam 8, and the driving cams 8 are rigidly and coaxially connected with a square core 9. The same play exists between the two drive cams 8 and the drive rod 7 so that the drive cam 8 rotates about the axis of the square core 9 with the outer convex side of the drive cam 8 facing to the left. Cam stop levers 7a arranged in the front-back direction are embedded on the upper side and the lower side of the driving rod 7, the cam stop levers 7a are distributed in an up-down symmetrical mode along the symmetrical surface of the driving rod 7, the driving cam 8 is arranged between the upper cam stop lever 7a and the lower cam stop lever 7a, the distance from the farthest point on the outer convex side of the driving cam 8 to the circle center of the driving cam 8 is larger than the distance from any point on the cam stop lever 7a to the circle center of the driving cam 8 in the whole movement process, the purpose is to enable the driving cam 8 to be in contact with the cam stop levers 7a in the rotation process, so that the driving rod 7 can be driven to move rightwards, a driving wedge block 7b extending downwards is arranged below the driving rod 7, the wedge face of the driving wedge block 7b corresponds to the wedge face at the upper.

Referring to fig. 2, 3 and 7, a large positioning rod 1a is arranged on the left side of the square core 9, the large positioning rod 1a is parallel to the square core 9, the large positioning rod 1a is a fixed cylindrical rod and is horizontally arranged front and back, the front end and the back end are fixedly connected to the front side and the back side of the square lock box 1, and the middle of the large positioning rod passes through the long groove 7d of the driving rod and is connected with the long groove 7d of the driving rod in a sliding manner. In the use process, lubricating oil is coated on the large positioning rod 1a, so that the purpose is to position the driving rod 7 and facilitate the left and right movement of the driving rod 7.

As shown in fig. 2, 3 and 4, the longitudinal rack 10 in the limiting mechanism is arranged below the driving wedge block 7b, the longitudinal rack 10 is vertically arranged up and down, the upper end of the longitudinal rack is wedge-shaped, and the longitudinal rack and the driving wedge block 7b form a wedge-shaped mechanism. The longitudinal rack 10 faces to the left, the lower end of which is engaged with a gear 11, the gear 11 simultaneously engaging with a transverse rack 12. The transverse rack 12 is horizontally arranged left and right on the lower side of the gear 11. The left end of the transverse rack 12 is rigidly connected to the right end of the moving magnet 13, and the left magnetic pole of the moving magnet 1 is the same as the right magnetic pole of the fixed magnet 14, thereby forming a repulsive force. A large wedge block 12a extending backwards is arranged at the rear end face of the transverse rack 12, and a rotary buckle plate 15 is arranged at the rear side of the large wedge block 12a. The rotating buckle plate 15 is a rectangular plate arranged in the vertical direction, and the middle section of the rotating buckle plate 15 penetrates through the small positioning rod 1b, so that the rotating buckle plate can rotate around the small positioning rod 1b.

The small positioning rod 1b is a T-shaped rod consisting of a rectangular rod and a cylindrical rod, the rotary buckle plate 15 is sleeved on the cylindrical rod horizontally arranged on the left and right, and the rectangular rod is arranged on the rear side of the rotary buckle plate 15 and extends backwards to the rear side wall of the square lock box 1 to be fixedly connected with the square lock box 1. Under little locating lever 1b to the rear side that is located rotatory buckle 15 hypomere is equipped with buckle spring 22, and buckle spring 22 is horizontal around arranging, and buckle spring 22's front end fixed connection is in the trailing flank of rotatory buckle 15 hypomere, and rear end fixed connection is in square lock box 1. The front-rear length of the rectangular bar of the small positioning bar 1b is the same as the length of the buckle spring 22 in the original state. In the use process of the small positioning rod 1b, lubricating oil is coated on the cylindrical rod, so that the rotating buckle plate 15 can rotate around the axis of the cylindrical rod conveniently, and the rotating buckle plate 15 is positioned. In the closed state, the rotating buckle 15 is in a vertical state.

The upper section of the rotating buckle plate 15 is provided with a limiting block 15a extending forwards, the front side surface of the lower section is provided with a small wedge-shaped block 15b extending forwards, a large wedge-shaped block 12a is arranged right in front of the small wedge-shaped block 15b, the small wedge-shaped block 15b corresponds to the large wedge-shaped block 12a, and a wedge-shaped mechanism is formed when the small wedge-shaped block and the large wedge-shaped block are in contact. The limiting plate 16 is arranged on the front side of the limiting block 15a, a rectangular limiting groove which is through from front to back is formed in the left section of the limiting plate 16, and the rectangular limiting groove can be matched with the limiting block 15a. The limiting plate 16 is positioned on the right side of the T-shaped rod 17, the T-shaped rod 17 extends out of the T-shaped groove 3a rightwards and is fixedly connected with the left end of the limiting plate 16, and therefore the limiting plate 16 is linked with the bolt baffle 3 through the T-shaped rod 17 and the T-shaped groove 3a. Like this, after spring bolt baffle 3, T shape pole 17 and limiting plate 16 moved right together, until the rectangle spacing groove on the limiting plate 16 with stopper 15a front and back just to the right, rotatory buckle 15 is rotatory, just makes stopper 15a can insert in the rectangle spacing groove to play limiting displacement.

The horizontal plate of 3 the latter half of spring bolt baffle sets up baffle spring 18 in the place ahead of limiting plate 16 between the horizontal plate of 16 and 3 the latter half of spring bolt baffle, and baffle spring 18 arranges for the fore-and-aft direction, and the horizontal plate of 3 the latter half of its front end rigid connection spring bolt baffle, rear end rigid connection limiting plate 16, four baffle springs 18 arrange along four summit circumference of limiting plate 16, see fig. 3. In the closed state, the four striker springs 18 are in their original state, which is intended to facilitate the bolt-restraining action.

Referring to fig. 4 again, in the door closing state, a front-back distance is left between the limiting block 15a and the limiting plate 16, the front-back distance is not in contact with each other, the small wedge 15b is not in contact with the transverse rack 12 and the large wedge 12a, the large wedge 12a and the small wedge 15b are staggered by a certain distance from left to right, the front end of the buckle spring 22 is rigidly connected with the rotary buckle 15, the rear end of the buckle spring is rigidly connected with the square lock box 1, and the buckle spring 22 is in the original state in the door closing state.

Referring to fig. 2, in a door closing state, the bolt 2 is ejected leftwards, and the moving magnet 13 is retracted rightwards; referring to fig. 6, in the door-opened state, the latch 2 is retracted to the right, and the moving magnet 13 is moved to the right and pushed to the limit position flush with the left side surface of the lock case 1.

Referring to fig. 6 and 8, the mechanism is divided into three phases of movement when the door is opened. The first movement stage is that a user rotates the handle 20 and pushes the door, in the movement stage, the handle 20 drives the driving cam 8 fixedly connected to the square core 9 to rotate around the central line of the square core 9, the driving cam 8 pushes the cam stop lever 7a on the driving rod 7 to enable the driving rod 7 to horizontally move rightwards, the driving rod 7 drives the bolt buckle 5, the bolt baffle 3 and the bolt 2 to move rightwards together, meanwhile, the limit plate 16 moves rightwards along with the bolt baffle 3, the bolt baffle 3 compresses the bolt return spring 4, in the movement stage, the driving wedge block 7b below the driving rod 7 is not in contact with the wedge at the upper end of the longitudinal rack 10, in the movement process, two parts are just in contact after the movement is finished, the limit plate 16 also just reaches the position where the limit block 15a can be embedded into the limit through groove, and the purpose of the movement stage is to shrink the bolt 2 and eliminate the limit, so that the door opening can be prevented from overcoming the interaction force of the magnets. The second movement stage is that the user continues to rotate the handle 20, in the movement stage, the driving wedge 7b below the driving rod 7 extrudes the wedge surface part at the upper end of the longitudinal rack 10, so that the longitudinal rack 10 moves vertically downwards, the gear 11 meshed with the longitudinal rack 10 rotates and drives the transverse rack 12 meshed with the longitudinal rack to move horizontally leftwards, so as to drive the moving magnet 13 to move leftwards to a limit position, at the moment, the large wedge 12a on the transverse rack 12 extrudes the small wedge 15b at the lower end of the rotating buckle 15, so as to drive the small wedge 15b to move backwards, so as to drive the rotating buckle 15 to rotate backwards around the small positioning rod 1b, the lower section of the rotating buckle 15 compresses the buckle spring 22 backwards, meanwhile, the limit block 15a at the upper section of the rotating buckle 15 is embedded in the limit through groove of the limit plate 16, so that the lock tongue 2 is in a contraction state in the whole door opening stage, the purpose of this movement phase is to restrain the bolt 2. In the third motion stage, a user releases the handle 20, the handle spring 21 restores to the initial state and drives the handle 20 to return, and the driving cam 8 also restores to the state before the door is opened.

Referring to fig. 2 and 4, when the door is closed, due to the principle that like poles of magnets repel each other, the moving magnet 13 is horizontally moved rightwards by the repulsive force of the fixed magnet 14, the transverse rack 12 also moves rightwards, the gear 11 meshed with the transverse rack 12 drives the longitudinal rack 10 to move upwards vertically, the large wedge block 12a on the transverse rack 12 is staggered with the small wedge block 15b on the rotary buckle plate 15, the rotary buckle plate 15 is restored to the initial position by the elastic force of the buckle plate spring 22, the limiting block 15a is also withdrawn from the limiting through groove on the limiting plate 16, due to the restriction release, the bolt baffle 3 pushes the bolt 2 to be ejected leftwards by the elastic force of the bolt return spring 4, the driving rod 7 is driven by the bolt buckle 5 to move leftwards, and the whole mechanism is.

The invention realizes the actions of the bolt 2 after the door is opened and the bolt 2 pops out after the door is closed by the cooperation of the limiting block 15a and the limiting plate 16, ensures that the bolt can not pop out in the state of opening the door, ensures that the excessive resistance is not required to be overcome by arranging the limiting clearance when the door is opened, improves the practicability of the door lock, and achieves the purposes of convenient use and protecting passers-by.

Claims

1. The utility model provides a but lock of automatic spacing spring bolt, it inlays on the door frame to detain box (19), it is equipped with the square groove of opening towards spring bolt (2) to detain box (19) upper portion, square lock box (1) is fixed to be inlayed in the door, fixed fender box (6) that is equipped with in upper portion left side in square lock box (1), spring bolt (2) right-hand member rigid connection spring bolt baffle (3) first half, spring bolt baffle (3) first half right-hand member rigid connection spring bolt is detained (5), the cover has spring bolt return spring (4) on spring bolt is detained (5), the left end of actuating lever (7) is connected in spring bolt knot (5), open actuating lever (7 d) that link up around having on the right side section of actuating lever (7), the interlude of square core (9) passes actuating lever (7 d), handle (20) of each rigid connection in square core (9): the front side and the rear side of the long groove (7 d) of the driving rod are respectively provided with a driving cam (8) which is rigidly and coaxially connected with the square core (9), the upper side and the lower side of the driving rod (7) are respectively embedded with a cam stop lever (7 a), and the driving cam (8) keeps in contact with the cam stop lever (7 a) in the rotating process to drive the driving rod (7) to move rightwards; a fixed magnet (14) is fixedly embedded in the lower part of the buckle box (19), a moving magnet (13) generating repulsion with the fixed magnet (14) is arranged right on the fixed magnet (14), and the lower half part of the lock tongue baffle plate (3) is connected with the left end of the limiting plate (16) through a T-shaped rod (17); a driving wedge block (7 b) extending downwards is arranged below the driving rod (7), and a wedge-shaped mechanism is formed when the driving wedge block (7 b) is contacted with a wedge surface at the upper end of the longitudinal rack (10) below the driving wedge block; the vertical rack (10) is vertical up and down, the lower end of the vertical rack is meshed with the gear (11), the gear (11) is meshed with the horizontal rack (12) which is horizontal left and right, and the left end of the horizontal rack (12) is rigidly connected with the right end of the movable magnet (13); a large wedge-shaped block (12 a) extending backwards is arranged at the rear end face of the transverse rack (12), and a rotary buckle plate (15) is arranged at the rear side of the large wedge-shaped block (12 a); the upper section of the rotary buckle plate (15) is provided with a limiting block (15 a) extending forwards, the middle section of the rotary buckle plate (15) penetrates through the small positioning rod (1 b) and can rotate forwards and backwards around the small positioning rod (1 b), the small positioning rod (1 b) is fixedly connected to the square lock box (1), the rear side surface of the lower section of the rotary buckle plate (15) is fixedly connected to the square lock box (1) through buckle plate springs (22) which are horizontal forwards and backwards, the front side surface of the lower section of the rotary buckle plate (15) is provided with a small wedge-shaped block (15 b) extending forwards, and a wedge-shaped mechanism is formed when the small wedge-shaped block (15 b) is contacted with the large wedge-; the limiting plate (16) is arranged on the front side of the limiting block (15 a), and a rectangular limiting groove which is communicated from front to back and can be matched with the limiting block (15 a) is arranged on the left section of the limiting plate (16); the baffle spring (18) is arranged in the front-back direction, the front end of the baffle spring is rigidly connected with the lower half part of the bolt baffle (3), and the rear end of the baffle spring is rigidly connected with the limiting plate (16).

2. The door lock capable of automatically limiting the bolt of claim 1, which is characterized in that: when the handle (20) is rotated and a door is pushed, the driving rod (7), the bolt buckle (5), the bolt baffle (3) and the bolt (2) horizontally move rightwards, the wedge-shaped block (7 b) is driven to be not in contact with the wedge-shaped upper end of the longitudinal rack (10) in the moving process, the wedge-shaped block is just in contact with the wedge-shaped upper end of the longitudinal rack after the moving is finished, and the limiting plate (16) is embedded into the limiting through groove of the limiting block (15 a); when the handle (20) continues to rotate, the wedge-shaped block (7 b) is driven to drive the longitudinal rack (10) to move, the moving magnet (13) moves leftwards to a limit position which is flush with the left side face of the square lock box (1), the large wedge-shaped block (12 a) drives the small wedge-shaped block (15 b) to move backwards, and the limiting block (15 a) is embedded in a limiting through groove of the limiting plate (16); when the handle (20) is loosened, the handle (20) returns.

3. The door lock capable of automatically limiting the bolt of claim 2, wherein: when the door is closed, the movable magnet (13) is horizontally moved rightwards by repulsive force of the fixed magnet (14), the large wedge block (12 a) and the small wedge block (15 b) are staggered, the rotary buckle plate (15) is restored to the initial position by elastic force of the buckle plate spring (22), the limiting block (15 a) is withdrawn from the limiting through groove in the limiting plate (16), the bolt baffle (3) is pushed by elastic force of the bolt return spring (4) to eject the bolt (2) leftwards, and the driving rod (7) is moved leftwards to be restored to the position state before the door is opened.

4. The door lock capable of automatically limiting the bolt of claim 1, which is characterized in that: the lock tongue buckle (5) is provided with a lock tongue buckle through groove (5 a) which is through from front to back, the left end of the driving rod (7) is a clasp (7 c), and the clasp (7 c) is detachably clamped in the lock tongue buckle through groove (5 a).

5. The door lock capable of automatically limiting the bolt of claim 1, which is characterized in that: the spring bolt return spring (4) is located and keeps off the inside of box (6), and the left end rigid connection spring bolt baffle (3) of spring bolt return spring (4), right-hand member rigid connection keep off the right flank of box (6), and during the state of closing the door, spring bolt (2) are stretched in detaining box (19), and spring bolt return spring (4) are in original state.

6. The door lock capable of automatically limiting the bolt of claim 1, which is characterized in that: the upper half part of the bolt baffle (3) is of a plate-shaped structure and is positioned inside the baffle box (6), the lower half part of the bolt baffle (3) extends downwards below the baffle box (6), the lower half part of the bolt baffle (3) is of an L-shaped structure, the L-shaped structure consists of a vertical plate and a horizontal plate, the vertical plate extends downwards from the upper half part of the bolt baffle (3), the vertical plate of the L-shaped structure extends along the left-right direction, a T-shaped groove (3 a) with an opening facing the right is formed in the vertical plate of the L-shaped structure, and the T-shaped groove (3 a) is connected with the left end of the T-shaped rod (17).

7. The door lock capable of automatically limiting the bolt of claim 1, which is characterized in that: every handle (20) below is provided with along the vertically handle rectangular plate (20 a) that the fore-and-aft direction was arranged, and the left and right sides of handle rectangular plate (20 a) respectively has handle spring (21) that the level was arranged about one, this handle rectangular plate (20 a) of handle spring (21) one end rigid connection, other end rigid connection in square lock box (1).

8. The door lock capable of automatically limiting the bolt of claim 1, which is characterized in that: a front and back horizontal large positioning rod (1 a) is arranged on the left side of the square core (9), the front end and the back end of the large positioning rod (1 a) are fixedly connected to the square lock box (1), and the middle of the large positioning rod passes through a driving rod long groove (7 d) and is connected with the driving rod long groove (7 d) in a sliding mode.

9. The door lock capable of automatically limiting the bolt of claim 1, which is characterized in that: when the door is closed, the rotating buckle plate (15) is in a vertical state, the limiting block (15 a) is not in contact with the limiting plate (16), the small wedge block (15 b) is staggered with the transverse rack (12) and the large wedge block (12 a) and is not in contact with the transverse rack, the large wedge block (12 a) is not in contact with the rotating buckle plate (15), and the buckle plate spring (22) is in an original state.

10. The door lock capable of automatically limiting the bolt of claim 1, which is characterized in that: the small positioning rod (1 b) is a T-shaped rod consisting of a rectangular rod and a cylindrical rod, the rotary buckle plate (15) is sleeved on the cylindrical rod horizontally at the left and right, and the rectangular rod is fixedly connected with the square lock box (1) at the rear side of the rotary buckle plate (15) and extends backwards to the rear side wall of the square lock box (1).