CN210768209U - Double-quick-acting mortise lock body - Google Patents

Abstract

The utility model relates to the technical field of lock, and discloses a double-quick real mortise lock body, which comprises a bottom plate, a panel vertical to the bottom plate, an oblique tongue locking piece and a square tongue locking piece arranged on the bottom plate, the bottom plate is also provided with a latch bolt driving piece for driving the latch bolt locking piece to unlock and a latch bolt driving piece for driving the latch bolt locking piece to lock and unlock, the latch bolt driving piece is linked with a handle connected with an electronic unlocking system, the latch bolt locking piece is connected with a linkage piece which is linked with the latch bolt locking piece and can drive the latch bolt locking piece to unlock, the linkage piece comprises a transmission piece and a push strip, one end of the transmission piece and the push strip are hinged with each other, and a movable block is fixed on the dead bolt locking piece, the free end of the push strip is close to the square tongue driving piece, the free end of the transmission piece is close to the oblique tongue locking piece, and a movable hole for sliding of the movable block is formed in the push strip. The utility model discloses have the effect that still can open the door when the outage of electron unblock system is inefficacy.

Description

Double-quick-acting mortise lock body

Technical Field

The utility model relates to a technical field of tool to lock, more specifically say that it relates to a double fast real mortise lock body.

Background

With the great application of electronic products in life, the traditional lock manufacturing industry gradually enters new fields of informatization and intellectualization, such as remote control unlocking of mobile phones, face and fingerprint identification unlocking and the like, and the lock manufacturing industry continuously enters the home life of common consumers.

At present, a chinese patent with an authorization publication number of CN206053598U discloses a fingerprint electronic lock, which includes a built-in mechanical lock body and a panel installed outside a door panel, wherein the panel is provided with a handle capable of being unlocked for the second time by rotating a lock bolt after primary unlocking and a lock cylinder position capable of being mechanically unlocked directly by a key; the handle is provided with a fingerprint input device which is electrically connected with an internal electronic unlocking system to realize one-time unlocking.

However, most of the existing locks are provided with a square bolt besides an anti-insertion latch bolt to lock the door panel doubly, so as to prevent other people from opening the door by destroying the handle, and the anti-insertion latch bolt and the square bolt are controlled by an electronic unlocking system and a key respectively. However, the electronic unlocking system is controlled to be switched on and off by electric power, and the electronic unlocking system fails to stop running under the condition of power failure, so that the handle cannot rotate to realize unlocking, and the door cannot be unlocked after being locked, and people need to recharge or dismantle the lockset to open the door to be improved.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model provides a double fast true mortise lock body has the effect that still can open the door when the outage of electron unblock system became invalid.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a double-fast true lock pin lock body, includes the panel of bottom plate, perpendicular to bottom plate and sets up oblique tongue locking piece and the square tongue locking piece on the bottom plate, still be provided with the oblique tongue driving piece of the unlocking of drive oblique tongue locking piece and drive square tongue locking piece locking and the square tongue driving piece of unblock on the bottom plate, oblique tongue driving piece and the handle linkage that is connected with electron unblock system, be connected with on the square tongue locking piece and order about the linkage piece of oblique tongue locking piece unblock with oblique tongue locking piece linkage, the linkage piece includes the mutual articulated drive plate of one end and pushes away the strip and fix the movable block on the square tongue locking piece, push away the free end of strip and press close to the square tongue driving piece the oblique tongue locking piece is pressed close to the free end of drive plate, it is equipped with the movable hole that supplies the movable block to slide.

Through adopting above-mentioned technical scheme, the door receives double locking when oblique tongue locking piece and square tongue locking piece combined action, and factor of safety is high, and electron unblock system control handle rotates to make the oblique tongue driving piece unblock oblique tongue locking piece. When the electronic unlocking system is in power failure, people can drive the push strip to move to one side close to the transmission piece through the square tongue driving piece, the movable block moves relative to the movable hole at the moment, the transmission piece rotates by taking the hinged position of the transmission piece and the push strip as the circle center, and then the inclined tongue locking piece is driven to unlock so as to open the door, and the door is prevented from being locked and cannot enter.

The utility model discloses further set up to: the inclined tongue locking piece comprises an anti-insertion inclined tongue, a pull rod, a positioning piece and a return spring, wherein the anti-insertion inclined tongue, the pull rod and the positioning piece are fixedly connected with each other, the return spring is sleeved on the pull rod, a fixing piece sleeved outside the pull rod is arranged on the bottom plate, the return spring is positioned between the anti-insertion inclined tongue and the fixing piece, a positioning hole is formed in the bottom plate, and one end of the positioning piece is slidably arranged in the positioning hole; the panel is provided with an oblique tongue hole for the anti-insertion oblique tongue to move out, and the anti-insertion oblique tongue extends out of the oblique tongue hole under the action of the reset spring.

By adopting the technical scheme, when the latch bolt locking piece is unlocked, the positioning piece is controlled to move towards one side far away from the latch bolt hole through the latch bolt driving piece until the anti-insertion latch bolt is received in the latch bolt hole, one end of the positioning piece is slidably arranged in the positioning hole, and the reset spring is abutted against the fixing piece and generates elasticity. When the latch bolt locking piece is locked, the latch bolt driving piece is separated from the positioning piece, and the anti-plugging latch bolt can automatically extend out of the latch bolt hole under the action of the return spring, so that the door is kept in a normally closed state when not influenced by external force.

The utility model discloses further set up to: and a fastening hole is formed in one side of the anti-insertion oblique tongue, which is far away from the pull rod, and an anti-insertion small tongue with a different inclination angle from the anti-insertion oblique tongue is hinged in the fastening hole.

By adopting the technical scheme, the small anti-insertion tongue improves the connection tightness of the anti-insertion oblique tongue and the door frame when the door is locked, so that the anti-insertion oblique tongue is not easy to separate from the door frame.

The utility model discloses further set up to: and a rubber pad is arranged on one side of the fixed piece, which faces the return spring.

Through adopting above-mentioned technical scheme, the cushion plays the effect of buffering protection when reset spring is flexible, stability when having improved the locking of oblique tongue locking piece and unblock.

The utility model discloses further set up to: the latch driving piece comprises a square core column and a lower chip, wherein a first rotating hole is formed in the lower chip and is arranged on the square core column through the first rotating hole, a rotating block is integrally formed on the side wall of the square core column and is provided with a square hole for the handle to stretch into, a first limiting groove for the rotating block to rotate by a certain angle is formed in the side wall of the first rotating hole, and an upward pushing piece abutted to the positioning piece is arranged on one side, facing the latch locking piece, of the lower chip.

Through adopting above-mentioned technical scheme, during unblock oblique tongue locking piece, the handle stretches into the square hole and drives the square core post and rotate for the turning block rotates with the lateral wall butt of first spacing groove, and the below chip uses the square core post to rotate as the centre of a circle, and the push-up piece drive spacer moves to one side of keeping away from the oblique tongue hole, thereby makes to prevent inserting the oblique tongue and stretch into the oblique tongue hole inboard in order to realize the unblock.

The utility model discloses further set up to: the square bolt locking piece comprises a square bolt and a connecting plate which are fixedly connected, and a square lock hole for the square bolt to extend out is formed in the panel; the dead bolt driving piece comprises a shifting wheel, a moving block fixed on the side wall of the shifting wheel and a shifting piece rotationally connected to the bottom plate, a key hole for inserting a key is formed in the shifting wheel, and a moving groove matched with the moving block is formed in one side, facing the shifting wheel, of the shifting piece; the connecting plate is provided with a guide hole and a sliding hole which is obliquely arranged, and the poking piece is fixed with a guide post which is arranged in the guide hole in a sliding way and a sliding post which is arranged in the sliding hole in a sliding way.

By adopting the technical scheme, when the square bolt locking piece is locked, a key is inserted into the key hole and drives the shifting wheel to rotate, so that the moving block extends into the moving groove, the shifting piece rotates by taking the hinged position of the shifting piece and the bottom plate as the circle center, the sliding column is driven to move relative to the sliding hole, the guide column moves relative to the guide hole, and the connecting plate drives the square bolt to extend out of the square lock hole so as to realize locking. Similarly, when the square bolt locking piece is unlocked, the shifting wheel is reversely rotated, the moving block drives the shifting piece to reversely rotate firstly, and then the connecting plate is driven to drive the square bolt to move towards one side far away from the square lock hole. After the square tongue is unlocked, the thumb wheel is continuously rotated to drive the push strip to move, and the transmission piece pushes the positioning piece to unlock the inclined tongue locking piece.

The utility model discloses further set up to: an upper chip is arranged between the lower chip and the transmission piece, a second rotating hole is formed in the upper chip and is sleeved on the square core column through the second rotating hole, a second limiting groove for the rotating block to rotate for a certain angle is formed in the inner wall of the second rotating hole, and the second limiting groove and the first limiting groove are arranged in a staggered mode; one side of the upper chip, which faces the square tongue driving piece, is connected with a return lifting piece, and one side of the shifting piece, which faces the upper chip, is provided with a shifting block matched with the return lifting piece.

Through adopting above-mentioned technical scheme, utilize handle drive side stem to its one side rotation of pressing close to with the second spacing groove lateral wall, the relative below chip of square stem idles this moment, and the top chip uses the square stem to rotate as the centre of a circle, returns and carries the piece and stir the piece butt and orders about the plectrum and rotate to make even board drive side spring bolt stretch out the side lockhole. People can also control the locking of the square bolt through the handle, and the opening and closing modes of the door are various.

The utility model discloses further set up to: and a lower pushing sheet used for limiting the rotation range of the poking block is arranged on one side of the lower chip facing the poking sheet.

By adopting the technical scheme, the lower push plate can limit the maximum rotating position of the shifting block, so that the limiting effect is achieved, and the phenomenon that the matching of the moving block and the moving groove is influenced by the overlarge rotating angle of the shifting plate is avoided.

The utility model discloses further set up to: the side of the shifting piece close to the bottom plate is integrally formed with a cushion block, one end of the cushion block close to the square spring bolt is fixed with a limiting column, the bottom plate is provided with an installation column, the installation column is connected with the limiting column through a locking torsion spring, and two ends of the locking torsion spring are respectively sleeved on the installation column and the limiting column.

By adopting the technical scheme, when the square bolt locking piece is locked, the locking torsion spring is tightly abutted against the limiting column and generates acting force towards the locking direction on the shifting piece, so that the locking stability is improved; when the dead bolt locking piece unblock, the locking torsional spring supports tightly the erection column and produces towards unblock direction pivoted effort to the plectrum, avoids the plectrum gyration.

To sum up, the utility model discloses following beneficial effect has:

1. when the oblique tongue driving piece cannot work due to failure of the electronic unlocking system in power failure, people can insert a key into the key hole to drive the shifting wheel to rotate, so that the moving block drives the pushing block and the transmission piece to rotate around the hinged position of the pushing block and the transmission piece, and further drives the positioning piece and the anti-insertion oblique tongue to move to unlock the oblique tongue locking piece, and the influence on the use of a user due to the fact that a door cannot be opened is avoided;

2. when the control module core column is controlled to drive the lower chip to rotate, the square core column idles relative to the upper chip, and the lower chip pushes the positioning piece and the anti-insertion latch bolt to move so as to realize unlocking of the latch bolt locking piece; when the square core column is controlled by the handle to drive the upper chip to rotate, the square core column idles relative to the lower chip, returns to lift the piece and drives the shifting block to abut and drive the shifting piece to rotate, so that the connecting plate and the square lock bolt move to one side close to the square lock hole to realize locking, the handle can be used for unlocking the lock bolt locking piece, the lock bolt locking piece can be locked, and the function is various.

Drawings

FIG. 1 is a schematic structural view of the present embodiment;

FIG. 2 is a schematic structural view of the present embodiment with the latch bolt locking member and the dead bolt locking member removed;

FIG. 3 is an exploded view of the present embodiment with the square stem, upper and lower dies, and the driver blade separated;

fig. 4 is an exploded view of the square-tongue locking member, the pick and the spacer in this embodiment.

Reference numerals: 1. a base plate; 11. positioning holes; 12. a fixing sheet; 121. a rubber pad; 13. mounting a column; 14. locking the torsion spring; 2. a panel; 21. an oblique tongue hole; 22. a slanting tongue sleeve; 23. a square lock hole; 24. a square lock sleeve; 3. a latch bolt locking member; 31. the anti-insertion latch bolt; 311. a fastening hole; 312. the tongue is prevented from being inserted; 32. a pull rod; 33. positioning plates; 34. a return spring; 4. a dead bolt locking member; 41. a square bolt; 42. connecting plates; 421. a guide hole; 422. a slide hole; 5. a latch tongue driving member; 51. a square core column; 511. a square hole; 512. rotating the block; 52. a lower chip; 521. a first rotation hole; 522. a first limit groove; 523. pushing up the sheet; 524. downward pushing the sheet; 6. a dead bolt driving member; 61. a thumb wheel; 611. a key hole; 62. a moving block; 63. a shifting sheet; 631. a moving groove; 632. a guide post; 633. a sliding post; 634. a shifting block; 64. cushion blocks; 641. a limiting column; 7. a linkage member; 71. a driving strap; 72. pushing the strips; 721. a movable hole; 73. a movable block; 8. an upper chip; 81. a second rotation hole; 82. a second limit groove; 83. and returning and lifting the tablets.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses a double-bolt lock body, as shown in fig. 1 and 2, the double-bolt lock body comprises a bottom plate 1, a panel 2 fixed at one end of the bottom plate 1 and perpendicular to the bottom plate 1, and a latch bolt locking piece 3 and a latch bolt locking piece 4 arranged on the bottom plate 1, wherein a latch bolt driving piece 5 and a latch bolt driving piece 6 are installed on the bottom plate 1, the latch bolt driving piece 5 can be used for controlling unlocking of the latch bolt locking piece 3, and the latch bolt driving piece 6 can be used for controlling locking and unlocking of the latch bolt driving piece 6. The square tongue locking piece 4 is provided with a linkage piece 7, and the linkage piece 7 can be used for driving the inclined tongue locking piece 3 to unlock, so that the door is prevented from being locked and cannot be opened.

As shown in fig. 1 and 2, the left end surface of the panel 2 is provided with an oblique tongue hole 21, and an oblique tongue sleeve 22 is fixed on the inner wall of the oblique tongue hole 21. The latch bolt locking piece 3 comprises an anti-insertion latch bolt 31, a pull rod 32, a positioning piece 33 and a return spring 34 sleeved on the pull rod 32, wherein the anti-insertion latch bolt 31 is fixed at the left end of the pull rod 32, and the positioning piece 33 is fixed at the right end of the pull rod 32. The bottom plate 1 is provided with a positioning hole 11 extending along the horizontal direction, and the rear end of the positioning sheet 33 is slidably arranged in the positioning hole 11. The bottom plate 1 is also fixed with a fixing plate 12, the fixing plate 12 is provided with a through hole, the left side of the fixing plate is fixed with a rubber pad 121, a pull rod 32 penetrates through the through hole, and a return spring 34 is positioned between the anti-insertion latch bolt 31 and the fixing plate 12. When the latch bolt locking piece 3 is unlocked, the latch bolt driving piece 5 drives the positioning piece 33 to move right, so that the anti-insertion latch bolt 31 is retracted into the latch bolt hole 21 to realize unlocking, and the return spring 34 is pressed on the fixing piece 12 to generate elasticity. When the latch bolt driving piece is separated from the positioning piece 33, the anti-insertion latch bolt 31 can be extended under the elastic force of the return spring 34 to realize the return locking.

As shown in fig. 1, the left end of the anti-insertion latch bolt 31 is provided with a fastening hole 311, an anti-insertion small bolt 312 is hinged in the fastening hole 311, the anti-insertion small bolt 312 and the anti-insertion latch bolt 31 are arranged in a staggered manner and have different inclination angles, so that the tightness of the connection between the anti-insertion latch bolt 31 and the door frame is improved.

As shown in fig. 2 and 3, the latch driving member 5 includes a square core 51 and a lower chip 52, a square hole 511 for mating with a handle is formed in the middle of the square core 51, and the handle is controlled by an electric unlocking system such as a fingerprint or a password. The middle part of the lower chip 52 is provided with a first rotating hole 521, the square core column 51 is arranged in the first rotating hole 521 in a penetrating manner, four first limiting grooves 522 are circumferentially distributed on the inner wall of the first rotating hole 521 by the circle center, four rotating blocks 512 are integrally formed on the side wall of the square core column 51, and gaps are reserved on the four rotating blocks 512 and the side wall of one side of each of the four first limiting grooves 522 in a butting manner and the other side of each of the four rotating blocks 512. The lower chip 52 includes a push-up piece 523 integrally provided on a sidewall thereof, the push-up piece 523 abuts against a left side of the positioning piece 33, and a push-down piece 524 is further fixed to a lower end of the sidewall of the lower chip 52. When the latch bolt locking piece 3 is unlocked, the square core column 51 is driven to rotate clockwise by the handle, the lower chip 52 rotates by taking the square core column 51 as a circle center, and the push-up piece 523 pushes the positioning piece 33 to move right, so that the anti-insertion latch bolt 31 moves right and is unlocked.

As shown in fig. 1 and 4, the square bolt locking member 4 includes a square bolt 41 and a connecting plate 42 fixedly connected to each other, the connecting plate 42 is located on the right side of the square bolt 41, a square locking hole 23 is formed in the left end face of the panel 2, the square locking hole 23 is located on the lower side of the inclined bolt hole 21, and a square locking sleeve 24 is fixed on the inner wall of the square locking hole. When the lock is locked, the left end of the square bolt 41 extends out of the square lock hole 23.

As shown in fig. 1 and 2, the dead bolt driving member 6 includes a dial wheel 61, a moving block 62 and a dial piece 63, the moving block 62 is fixed on a side wall of the dial wheel 61, a key hole 611 which is in plug-in fit with a key is arranged in the middle of the dial wheel 61, a cushion block 64 is fixed on one side of the dial piece 63 close to the bottom plate 1, the cushion block 64 is rotatably connected with the bottom plate 1, and the connecting plate 42 is located on the front side of the dial piece 63. The side wall of the dial plate 63 facing the dial wheel 61 is provided with a moving groove 631 matched with the moving block 62, the connecting plate 42 is provided with a guide hole 421 and a sliding hole 422, wherein the guide hole 421 extends along the horizontal direction, and the sliding hole 422 is obliquely arranged. The shifting piece 63 is fixed with a guide post 632 and a sliding post 633, the guide post 632 is slidably arranged in the guide hole 421, and the sliding post 633 is slidably arranged in the sliding hole 422. When the square bolt 41 is locked, a key is inserted into the key hole 611 and drives the thumb wheel 61 to rotate counterclockwise, the moving block 62 extends into the moving groove 631 and drives the thumb piece 63 to rotate clockwise, and the guide post 632 drives the connecting plate 42 to move left, so that the square bolt 41 extends out of the square lock hole 23. During unlocking, the driving dial wheel 61 rotates clockwise, the moving block 62 drives the dial piece 63 to rotate anticlockwise, and then the connecting plate 42 and the square lock tongue 41 are driven to move rightwards to unlock.

As shown in fig. 1 and 2, the linkage member 7 includes a transmission plate 71, a pushing bar 72 and a movable block 73 fixed on the connecting plate 42, the upper end of the pushing bar 72 is hinged to the transmission plate 71, the transmission plate 71 is sleeved on the outer side of the square stem 51, the pushing bar 72 is provided with a movable hole 721 extending along the vertical direction, and the movable block 73 is slidably disposed in the movable hole 721. The lower end of the push block is close to the thumb wheel 61, and the free end of the transmission piece 71 is abutted against the left side of the positioning piece 33. After the square bolt 41 is unlocked, the dial wheel 61 continues to rotate clockwise, the moving block 62 abuts against the push bar 72 and drives the hinged position of the push bar 72 and the transmission piece 71 to rotate as the center of circle, so that the positioning piece 33 moves to the right to unlock the anti-insertion latch bolt 31.

As shown in fig. 2 and 3, an upper chip 8 is disposed between the lower chip 52 and the transmission plate 71, a second rotation hole 81 is disposed in the middle of the upper chip 8, the square core column 51 is sleeved in the second rotation hole 81, four second limiting grooves 82 are disposed on the inner wall of the second rotation hole 81, four rotation blocks 512 are respectively disposed in the four second limiting grooves 82, a gap is reserved on one side wall of each rotation block and on the other side wall of each rotation block, and the four first limiting grooves 522 and the second limiting grooves 82 are arranged in a staggered manner. A return lifting piece 83 is fixed on the side wall of the upper chip 8 facing the lifting piece 63, and a lifting block 634 matched with the return lifting piece 83 is fixed on the side wall of the lifting piece 63 facing the upper chip 8. When the square core column 51 is rotated counterclockwise, the square core column 51 drives the upper core 8 to rotate reversely and rotate idly relative to the lower core 52, the return lifting piece 83 contacts the shifting block 634 and drives the shifting piece 63 to rotate clockwise, so that the connecting plate 42 and the square bolt 41 move leftwards to be locked.

As shown in fig. 2 and 4, a limiting column 641 is fixed at one end of the cushion block 64 close to the square bolt 41, an installation column 13 is fixed at a position on the bottom plate 1 close to the limiting column 641, the installation column 13 and the limiting column 641 are connected through a locking torsion spring 14, one end of the locking torsion spring 14 is sleeved on the installation column 13, and the other end is sleeved on the limiting column 641. When the dead bolt locking piece 4 is locked, the locking torsion spring 14 abuts against the limiting column 641 and generates an acting force which rotates towards the locking direction on the shifting piece 63, so that the stability is good; when the dead bolt locking member 4 is unlocked, the locking torsion spring 14 abuts against the mounting post 13 and generates an acting force on the shifting piece 63 rotating towards the unlocking direction, thereby preventing the shifting piece 63 from rotating.

The working process of the embodiment: when the electric power is sufficient, the handle can rotate, so that the unlocking of the inclined tongue locking piece 3 is controlled, and the locking and unlocking of the square tongue locking piece 4 are controlled by a key; when the power system is out of work in case of power failure, the handle cannot rotate. If the dead bolt locking piece 4 and the inclined bolt locking piece 3 are both in a locking state, at the moment, people can insert a key into the key hole 611 and rotate clockwise, so that the thumb wheel 61 drives the moving block 62 to rotate clockwise, the moving block 62 abuts against the side wall of the moving groove 631 and drives the thumb piece 63 to rotate counterclockwise, and the connecting plate 42 and the dead bolt 41 move rightwards to unlock the dead bolt locking piece 4. And when the thumb wheel 61 continues to rotate, the moving block 62 drives the push strip 72 and the transmission piece 71 to rotate by taking the hinged part as a circle center, so that the positioning piece 33 and the insertion-preventing latch bolt 31 are pushed to move rightwards, and the unlocking of the latch bolt locking piece 3 is realized.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims (9)

1. The utility model provides a two real mortise lock bodies that soon, includes panel (2) of bottom plate (1), perpendicular to bottom plate (1) and sets up latch bolt locking piece (3) and square bolt locking piece (4) on bottom plate (1), still be provided with latch bolt driving piece (5) and drive square bolt locking piece (4) locking and the square bolt driving piece (6) of unblock of drive latch bolt locking piece (3) unblock on bottom plate (1), latch bolt driving piece (5) and the handle linkage that is connected with electron unblock system, its characterized in that: be connected with on square tongue locking piece (4) and link and can order about linkage (7) of inclined tongue locking piece (3) unblock with inclined tongue locking piece (3), linkage (7) include one end mutual articulated transmission piece (71) and push away strip (72) and fix movable block (73) on square tongue locking piece (4), push away the free end of strip (72) and press close to square tongue driving piece (6) inclined tongue locking piece (3) is pressed close to the free end of transmission piece (71), it supplies activity hole (721) that movable block (73) slided to establish to be equipped with on strip (72) to push away.

2. A double-snap true mortise lock according to claim 1, characterized in that: the inclined tongue locking piece (3) comprises an anti-insertion inclined tongue (31), a pull rod (32), a positioning piece (33) and a return spring (34) sleeved on the pull rod (32), the anti-insertion inclined tongue (31), the pull rod (32) and the positioning piece are fixedly connected, the return spring (34) is arranged on the bottom plate (1) and sleeved outside the pull rod (32), the return spring (34) is located between the anti-insertion inclined tongue (31) and the fixing piece (12), the bottom plate (1) is provided with a positioning hole (11), and one end of the positioning piece (33) is slidably arranged in the positioning hole (11); the panel (2) is provided with an oblique tongue hole (21) for the removal of the anti-insertion oblique tongue (31), and the anti-insertion oblique tongue (31) extends out of the oblique tongue hole (21) under the action of the return spring (34).

3. A double-snap true mortise lock according to claim 2 wherein: a fastening hole (311) is formed in one side, away from the pull rod (32), of the anti-insertion oblique tongue (31), and an anti-insertion small tongue (312) with a different inclination angle from the anti-insertion oblique tongue (31) is hinged in the fastening hole (311).

4. A double-snap true mortise lock according to claim 2 wherein: one side of the fixing piece (12) facing the return spring (34) is provided with a rubber pad (121).

5. A double-snap true mortise lock according to claim 2 wherein: the latch bolt driving piece (5) comprises a square core column (51) and a lower chip (52), wherein a first rotating hole (521) is formed in the lower chip (52) and is sleeved on the square core column (51) through the first rotating hole (521), a rotating block (512) is integrally formed on the side wall of the square core column (51) and is provided with a square hole (511) for the handle to stretch into, a first limiting groove (522) for the rotating block (512) to rotate by a certain angle is distributed in the side wall of the first rotating hole (521), and an upward pushing piece (523) abutted against a positioning piece (33) is arranged on one side, facing the latch bolt locking piece (3), of the lower chip (52).

6. A double-snap true mortise lock according to claim 5 wherein: the square bolt locking piece (4) comprises a square bolt (41) and a connecting plate (42) which are fixedly connected, and a square lock hole (23) for the square bolt (41) to extend out is formed in the panel (2); the dead bolt driving piece (6) comprises a shifting wheel (61), a moving block (62) fixed on the side wall of the shifting wheel (61) and a shifting piece (63) rotatably connected to the bottom plate (1), wherein a key hole (611) for inserting a key is formed in the shifting wheel (61), and a moving groove (631) matched with the moving block (62) is formed in one side, facing the shifting wheel (61), of the shifting piece (63); be equipped with guiding hole (421) on even board (42) and be slide hole (422) that the slope set up, be fixed with on plectrum (63) and slide guide post (632) and the slip post (633) of establishing in slide hole (422) in the slip post (632) of establishing in guiding hole (421) in a sliding manner.

7. A double-snap true mortise lock according to claim 6 wherein: an upper chip (8) is arranged between the lower chip (52) and the transmission piece (71), a second rotating hole (81) is formed in the upper chip (8) and is sleeved on the square core column (51) through the second rotating hole (81), a second limiting groove (82) for the rotating block (512) to rotate for a certain angle is formed in the inner wall of the second rotating hole (81), and the second limiting groove (82) and the first limiting groove (522) are arranged in a staggered mode; one side of the upper chip (8) facing the square tongue driving piece (6) is connected with a back lifting piece (83), and one side of the shifting piece (63) facing the upper chip (8) is provided with a shifting block (634) matched with the back lifting piece (83).

8. A double-snap true mortise lock according to claim 7 wherein: and a lower pushing sheet (524) used for limiting the rotation range of the poking block (634) is arranged on one side of the lower chip (52) facing the poking sheet (63).

9. A double-snap true mortise lock according to claim 6 wherein: one side integrated into one piece that plectrum (63) are close to bottom plate (1) has cushion (64), one end that cushion (64) are close to square lock tongue (41) is fixed with spacing post (641), be equipped with erection column (13) on bottom plate (1), connect through locking torsional spring (14) between erection column (13) and spacing post (641), the both ends of locking torsional spring (14) cup joint respectively on erection column (13) and spacing post (641).

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