Double-tongue external door lock capable of automatically popping up

Abstract

A double-tongue external door lock capable of being popped up automatically comprises a lock body, an escapement hook, an inclined tongue, a dead tongue and a dragging body, the dragging body is provided with a limiting hole, a bottom plate of the lock body is provided with a screw hole column contained in the limiting hole, the screw hole column is in threaded connection with a first screw, the escapement hook is provided with a first through hole, and the dragging body is located between the head of the first screw and the end face of the screw hole column. The first screw penetrates through the limiting hole and the first through hole, and the escapement hook and the tow body are located between the head of the first screw and the end of the screw hole column. According to the utility model, a rotary connecting column does not need to be additionally arranged, so that the structure is simpler and more compact.

Description

Technical Field

[0001] The utility model relates to the field of locks, in particular to an automatically pop-up double-tongue exterior door lock. Background Art

[0002] The exterior anti-theft door lock is an old-fashioned product that entered ordinary households in the late 1980s. It has won a long-lasting reputation in the market due to its simple structure, easy installation and low price, especially in urban rental apartments.

[0003] Chinese patent announcement No. CN2674028Y discloses an external door lock, comprising a lock body and a base plate, wherein a base plate shift fork is installed at the lock hole on the base plate; a pull rod and a large plate (drag body) are installed in parallel in the lock body, and a rotating shift rod (escapement hook) is provided on the lock body between the pull rod and the large plate, and the rotating shift rod is movably connected with the pull rod; an oblique tongue is connected to the end of the pull rod, and a return spring is installed on the pad; a dead tongue is installed at one end of the large plate, and a large plate travel spring is installed between the other end and the lock body; a rear lock head is installed at the approximate center of the lock body, a rear lock head shift fork is provided on the rear lock head, the rear lock head shift fork is located in the lock body, a knob is provided on the rear lock head, a special-shaped hole is provided on the large plate, and a shift bar is provided on the knob that can drive the large plate to move through the special-shaped hole, and the shift bar can be movably contacted with the base plate shift fork, the rear lock head shift fork and the rotating shift rod respectively.

[0004] When closing the door, the pull rod drives the rotating lever to release the large plate, and the large plate automatically pops out the dead bolt under the push of the large plate travel spring, and the torsion spring pushes the knob to reset at the same time, and the door is locked. When opening the room, rotate the knob, and the toggle bar on the knob drives the large plate to move through the special-shaped hole on the large plate, so that the dead bolt is retracted into the lock body, and continue to rotate the knob, the toggle bar drives the rotating lever to rotate, and the rotating lever drives the pull rod to move, so that the oblique bolt is retracted into the lock body, thereby achieving the purpose of opening the door lock. The large plate is provided with a limited position hole, and the lock body is provided with a screw hole column accommodated in the limited position hole. The screw hole column is threadedly connected with a first screw, and the large plate is located between the head of the first screw and the end face of the screw hole column.

[0005] In the prior art, a torsion spring and a rotation connection column that is rotationally connected to the rotation lever are required, and the structure is relatively complicated. Utility Model Content

[0006] The utility model aims to provide an automatically pop-up double-tongue exterior door lock, which does not need to be provided with a rotating connecting column.

[0007] In order to achieve the above-mentioned purpose, the utility model provides an automatically pop-up double-tongue exterior door lock, including a lock body, an escapement hook, a slanted tongue, a dead tongue, and a drag body, the drag body being provided with a limiting hole, the bottom plate of the lock body being provided with a screw hole column accommodated in the limiting hole, the screw hole column being threadedly connected with a first screw, the escapement hook being provided with a first through hole, the drag body being located between the first screw head and the end face of the screw hole column, the first screw passing through the limiting hole and the first through hole, the escapement hook and the drag body being located between the first screw head and the end of the screw hole column.

[0008] In an embodiment of the present invention, a liner is provided between the first screw and the first through hole and the limiting hole, and the liner is integrally formed with the screw hole column.

[0009] In one embodiment of the utility model, the oblique tongue is connected to a pull rod, the lock body is provided with a guide plate sleeved outside the pull rod, and a first compression spring sleeved outside the pull rod is provided between the oblique tongue and the guide plate.

[0010] In one embodiment of the utility model, the end of the pull rod facing away from the inclined tongue is threadedly connected with a second screw, the pull rod is sleeved with a linkage plate located between the head of the second screw and the guide plate, a second compression spring is provided between the linkage plate and the head of the second screw, the escapement hook is provided with a linkage arm connected to the linkage plate, the drag body is provided with an engagement column cooperating with the escapement hook, the escapement hook is provided with a bayonet for engaging the engagement column, and the escapement hook is also provided with an open guide surface in contact with the engagement column.

[0011] In one embodiment of the utility model, it also includes a knob, which is connected and fixed with a long fork A and a short fork B for driving the drag body, the drag body is provided with a notch for accommodating the long fork, the escapement hook is provided with a swing arm C cooperating with the short fork B, the drag body and the long fork A are linked and cooperated, a tension spring is provided between the long fork and the bottom plate, the bottom plate is provided with a tension spring column connected to the tension spring, one end of the tension spring is sleeved outside the tension spring column, and the other end is sleeved outside the long fork, the tension spring is used to squeeze the left wall of the notch by driving the long fork A to keep the deadbolt in a locked position.

[0012] In one embodiment of the utility model, the right wall of the notch is provided with an arc-shaped avoidance section and an arc-shaped right extrusion section whose curvature gradually decreases toward the avoidance section; the left wall of the notch is provided with a left extrusion section and a non-return recessed section adjacent to the left extrusion section.

[0013] In one embodiment of the present utility model, the lock body front cover is provided with a lock cylinder fork D for connecting the lock cylinder, and the lock cylinder fork is used to drive the long fork A to rotate.

[0014] In an embodiment of the present utility model, the front cover is rotatably connected by a rotating shaft O to a transmission lever located between the long shift fork A and the lock core shift fork D. The lock core shift fork D is used to squeeze the root of the transmission lever close to the rotating shaft O. When the lock core is in the locked position and the transmission lever abuts against the lock core shift fork D, the long shift fork can move from the locked position in the accommodating anti - return recess to the avoiding position where it abuts against the avoiding section. The lock core shift fork D squeezes the long shift fork through the transmission lever to move from this locked position to the avoiding position.

[0015] In an embodiment of the present utility model, the lock core shift fork D is provided with a square hole for connecting the lock core, and the cross - section of the linkage plate is J - shaped.

[0016] In an embodiment of the present utility model, the lock body is provided with a battery box.

[0017] In the present utility model, there is no need to additionally provide a rotating connection column, and the structure is relatively simple and compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the automatic - pop - up double - tongue surface - mounted door lock in the locked state according to the first embodiment of the present utility model.

[0019] Figure 2 It is Figure 1 an exploded view of the lock body.

[0020] Figure 3 It is Figure 1 a structural diagram of the hidden lock body of the automatic - pop - up double - tongue surface - mounted door lock.

[0021] Figure 4 It is Figure 3 an exploded view.

[0022] Figure 5 It is Figure 3 a structural diagram of the body and the escapement hook.

[0023] Figure 6 It is Figure 3 a schematic structural diagram of the hidden lock body of the automatic - pop - up double - tongue surface - mounted door lock in another direction. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0025] Please refer to Figures 1-6 , the automatic pop-up double-tongue surface-mounted door lock of the first embodiment of the present utility model includes a lock body, a lock box 2, an escapement hook 3, a bevel tongue 4, a dead tongue 5, a drag body 6, and a knob 7.

[0026] The lock body includes a bottom plate 11, a front cover 12, a frame 13, and a plastic cover 14. The plastic cover 14 is provided with a battery box 141.

[0027] The bottom plate 11 of the lock body is provided with a screw hole column 111 accommodated in a limit hole 60. The screw hole column 111 is threadedly connected with a first screw 112. The escapement hook 3 is provided with a first through hole 30. The drag body 6 is located between the head of the first screw 112 and the end face of the screw hole column 111. The first screw 112 passes through the limit hole 60 and the first through hole 30. The escapement hook 3 and the drag body 6 are located between the head of the first screw 112 and the end of the screw hole column 111. The bottom plate 11 is provided with a spring post 115 connected to a tension spring 114. One end of the tension spring 114 is sleeved outside the spring post 115, and the other end is sleeved outside a long fork A. The tension spring 114 is used to keep the dead tongue 5 in the locked position by driving the long fork A to squeeze the left wall of the notch. A liner 111a is provided between the first screw 112 and the first through hole 30 and the limit hole 60. The liner 111a is integrally formed with the screw hole column 111.

[0028] The escapement hook 3 is provided with a linkage arm 31 connected to a linkage plate 44. The escapement hook 3 is provided with a bayonet 301 for engaging a engaging column 61. The escapement hook 3 is further provided with an opening guide surface 32 in contact with the engaging column 61. The second compression spring 45 is a bevel tongue reversing spring, and the bevel tongue 4 can be pulled out and rotated 180 degrees to achieve commutation. The escapement hook 3 is provided with a swing arm C cooperating with a short fork B.

[0029] The bevel tongue 4 is connected with a pull rod 41. The lock body is provided with a guide plate 113 sleeved outside the pull rod 41. A first compression spring 42 sleeved outside the pull rod 41 is provided between the bevel tongue 4 and the guide plate 113. The end of the pull rod 41 facing away from the bevel tongue 4 is threadedly connected with a second screw 43. The pull rod 41 is sleeved with a linkage plate 44 located between the head of the second screw 43 and the guide plate 113. A second compression spring 45 is provided between the linkage plate 44 and the head of the second screw 43.

[0030] The drag body 6 is provided with a limit hole 60. The drag body 6 is provided with an engaging column 61 cooperating with the escapement hook 3. The right wall of the notch is provided with an arc-shaped avoidance section 62 and a right extrusion section 63 with an arc whose curvature gradually decreases towards the avoidance section 62; the left wall of the notch is provided with a left extrusion section 64 and a check recess section 65 adjacent to the left extrusion section 64.

[0031] The knob 7 is fixedly connected with a long fork A and a short fork B for driving the drag body 6. The drag body 6 is provided with a notch for accommodating the long fork A. The drag body 6 is linked and cooperated with the long fork A. A tension spring 114 is provided between the long fork A and the bottom plate 11.

[0032] The front cover 12 of the lock body is provided with a lock core fork D for connecting the lock core, and the lock core fork is used to drive the long fork A to rotate.

[0033] The front cover 12 is rotatably connected through a rotating shaft O with a transmission lever 8 located between the long fork A and the lock core fork D. The lock core fork D is used to squeeze the root of the transmission lever 8 close to the rotating shaft O. When the lock core is in the locked position and the transmission lever 8 abuts against the lock core fork D, the long fork A can move from the locked position in the accommodation check recess to the avoidance position where it abuts against the avoidance section 62. The lock core fork D squeezes the long fork through the transmission lever 8 to move from the locked position to the avoidance position.

[0034] The lock core fork D is provided with a square hole for connecting the lock core, and the cross-section of the linkage plate 44 is J-shaped. In the present utility model, there is no need to additionally provide a rotating connection column, and the structure is relatively simple and compact. A frame 13 is provided between the bottom plate 11 and the front cover 12.

[0035] The process of this application is as follows;

[0036] Drive the long fork A to rotate the first stroke, squeeze the right extrusion section 63 to gradually move towards the avoidance section 62 while the stay tongue 5 partially contracts, and the engaging column 61 moves to contact the escapement hook 3;

[0037] Drive the long fork A to rotate the second stroke, squeeze the right extrusion section 63 to move until the long fork A contacts the avoidance section 62, the stay tongue 5 completely contracts, the engaging column 61 squeezes the opening guiding surface, the escapement hook 3 rotates, and the linkage arm 31 squeezes the linkage plate 44 to cause the pull rod 41 and the inclined tongue 4 to partially contract, and the short fork B contacts the swing arm C;

[0038] Drive the long fork A to rotate the third stroke, the position of the stay tongue 5 remains unchanged, the short fork B squeezes the swing arm C, the escapement hook 3 rotates, and the linkage arm 31 squeezes the linkage plate 44 to cause the escapement hook 3 to rotate and the inclined tongue 4 to completely contract, completing the unlocking and allowing the door to be opened.

[0039] The user releases the knob 7, and under the elastic force of the first compression spring 42 and the tension spring 114, the long fork A rotates reversely in the fourth stroke to disengage from the avoidance section 62, the position of the stay tongue 5 remains unchanged, the short fork B separates from the swing arm C, the inclined tongue 4 completely extends, and the escapement hook 3 engages with the engaging column 61;

[0040] Under the elastic force of the first compression spring 42, the long fork A rotates reversely in the fourth stroke to move to the left extrusion section 64 against the left wall, and the lock is in the door-opening state;

[0041] When the user closes the door, the diagonal tongue 4 is completely contracted by being squeezed by the lock box 2, the escapement hook 3 rotates and completely disengages from the engagement post 61. When the dead tongue 5 and the diagonal tongue 4 are aligned with the corresponding lock holes of the lock box 2, the long fork A rotates in the reverse direction in the fifth stroke to squeeze the left extrusion section 64 and insert it into the corresponding lock hole. The long fork A moves into the anti-check recess section 65, and the diagonal tongue 4 is inserted into the corresponding lock hole under the elastic force of the first compression spring 42, realizing locking.

[0042] The anti-check recess section 65 has an inclined surface 65a that contacts the long fork A and a locking surface 65b adjacent to the inclined surface. When the dead tongue 5 is pried and squeezed, the inclined surface squeezes the long fork until it abuts against the locking surface. Squeezing the long fork by the locking surface will generate a pressure on the body 6 perpendicular to the direction of the lock tongue contraction. The body 6 is restricted by the screw hole post 111 and cannot move perpendicular to the direction of the lock tongue, causing the dead tongue 5 to be stuck and unable to contract.

[0043] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic pop-up double-tongue exterior door lock, comprising a lock body, an escapement hook, a slanted tongue, a dead tongue, and a drag body, wherein the drag body is provided with a limit hole, the bottom plate of the lock body is provided with a screw hole column accommodated in the limit hole, the screw hole column is threadedly connected with a first screw, the escapement hook is provided with a first through hole, the drag body is located between the first screw head and the end face of the screw hole column, and is characterized in that: The first screw passes through the limiting hole and the first through hole, and the escapement hook and the drag body are located between the head of the first screw and the end of the screw hole column.

2. The automatic pop-up double-tongue exterior door lock according to claim 1, characterized in that: A liner is provided between the first screw and the first through hole and the limiting hole, and the liner is integrally formed with the screw hole column.

3. The automatic pop-up double-tongue exterior door lock according to claim 2, characterized in that: The oblique tongue is connected with a pull rod, the lock body is provided with a guide plate sleeved outside the pull rod, and a first compression spring sleeved outside the pull rod is provided between the oblique tongue and the guide plate.

4. The automatic pop-up double-tongue exterior door lock according to claim 3, characterized in that: The end of the pull rod facing away from the inclined tongue is threadedly connected with a second screw, the pull rod is sleeved with a linkage plate located between the head of the second screw and the guide plate, a second compression spring is provided between the linkage plate and the head of the second screw, the escapement hook is provided with a linkage arm connected to the linkage plate, the drag body is provided with an engagement column cooperating with the escapement hook, the escapement hook is provided with a bayonet for engaging the engagement column, and the escapement hook is also provided with an open guide surface in contact with the engagement column.

5. The automatic pop-up double-tongue exterior door lock according to claim 4, characterized in that: It also includes a knob, which is connected and fixed with a long fork A and a short fork B for driving the drag body, the drag body is provided with a notch for accommodating the long fork A, the escapement hook is provided with a swing arm C cooperating with the short fork B, the drag body and the long fork A are linked and cooperated, a tension spring is provided between the long fork and the bottom plate, the bottom plate is provided with a tension spring column connected to the tension spring, one end of the tension spring is sleeved outside the tension spring column, and the other end is sleeved outside the long fork, the tension spring is used to squeeze the left wall of the notch by driving the long fork A to keep the deadbolt in a locked position.

6. The automatic pop-up double-tongue exterior door lock according to claim 5, characterized in that: The right wall of the notch is provided with an arc-shaped avoidance section and an arc-shaped right extrusion section whose curvature gradually decreases toward the avoidance section; the left wall of the notch is provided with a left extrusion section and a non-return recessed section adjacent to the left extrusion section.

7. The automatic pop-up double-tongue exterior door lock according to claim 6, characterized in that: The front cover of the lock body is provided with a lock core fork D for connecting the lock core, and the lock core fork is used to drive the long fork A to rotate.

8. The automatic pop-up double-tongue exterior door lock according to claim 7, characterized in that: The front cover is rotatably connected to a transmission lever located between the long fork A and the lock core fork D through a rotating shaft O. The lock core fork D is used to squeeze the root of the transmission lever close to the rotating shaft O. When the lock core is in a locked position and the transmission lever abuts against the lock core fork D, the long fork can move from the locked position accommodated in the non-return recess to the avoidance position abutting against the avoidance section. The lock core fork D moves from the locked position to the avoidance position by squeezing the long fork through the transmission lever.

9. The automatic pop-up double-tongue exterior door lock according to claim 8, characterized in that: The lock core fork D is provided with a square hole for connecting the lock core, and the cross section of the linkage plate is J-shaped.

10. The automatic pop-up double-tongue exterior door lock according to claim 9, characterized in that: The lock body is provided with a battery box.

Images