Double door lock

Abstract

A double door lock relates to the field of lock manufacturing. The lock is installed on both sides of the double door, and its lock core is covered with a lock bolt. The lock bolt is provided with a rotating paddle. The paddle of the rotating paddle is slidably matched with the locking plate and the square tongue assembly. The pressure spring is used to reset the locking plate. The locking plate moves laterally along the transverse mounting column, and the square tongue assembly moves vertically in the locking plate. When locking the door, it is pressed against the side end surface of the hook tongue. The two hook tongues inside and outside lock the double door. Due to the narrow door gap, the sawing tool cannot be operated, and the hook tongue is sawed off. The hook tongue is relatively long, and the double door is pushed from the inside and kicked from the outside, which is not easy to deform the double door, making it difficult to open the double door. The lock enhances the safety performance of the lock while also enhancing the reliability of the lock, giving users a better user experience.

Description

Technical Field

[0001] The invention relates to the field of lock manufacturing, in particular to a double-door lock. Background Art

[0002] At present, U-shaped locks and double door locks are commonly used for double doors.

[0003] However, the existing door locks still have the following technical defects:

[0004] 1. The extended lock tongue of the double door lock is short, and the anti-theft and anti-pry performance is poor;

[0005] Second, the exposed part of the U-shaped lock is easy to be sawed off with tools, and the anti-theft and anti-pry performance is poor.

[0006] In summary, how to overcome the above technical defects of locks in traditional technology is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0007] The object of the present invention is to provide a double door lock to solve the above problems.

[0008] In order to achieve the above object, the technical solution of the present invention is achieved as follows:

[0009] A double door lock, comprising a lock body and a lock tongue housing, wherein the lock body and the lock tongue housing are symmetrically installed on the inner and outer sides of the double door in pairs, and the lock body comprises: a lock shell, a lock core, a lock bolt, a lock shell bottom plate, a handle, and a handle connecting rod, wherein:

[0010] The lock housing comprises: a lock hole, a handle hole, a mounting column A, a mounting column B and a mounting column C arranged on the inner surface of the lock housing, and a lock tongue opening I arranged on the side plate of the lock housing;

[0011] The lock core is installed in the lock hole and is sleeved with a lock bolt;

[0012] The lock housing bottom plate is used to enclose the lock housing and the components therein;

[0013] The two ends of the handle connecting rod are respectively connected to the handle by passing through the handle connecting rod hole on the lock shell bottom plate which is symmetrically installed inside and outside and the handle hole on the lock shell;

[0014] The lock tongue housing comprises: a lock tongue opening II arranged on a side plate of the lock tongue housing;

[0015] The lock tongue housing bottom plate is used to enclose the lock tongue housing and the components therein;

[0016] The lock body further comprises: a rotating paddle, a locking plate, a square tongue assembly, a pressure spring, a hook tongue, and a torsion spring, wherein:

[0017] The rotating paddle comprises: a rotating paddle body, an inner circular hole at the center of the rotating paddle body, and a paddle arranged at the outer edge of the rotating paddle body and extending vertically, wherein: the inner circular hole is sleeved in the annular groove at the top of the lock bolt and fixed by a snap ring;

[0018] The locking piece is a groove-shaped structure, one side of which is a sawtooth-shaped structure and is slidably matched with the paddle. A limit plate is provided at the inner lower part of the groove-shaped structure on the other side, and a circular protrusion is provided at the outer side. The groove wall has a through transverse sliding hole I and a transverse sliding hole II. The transverse sliding hole I and the transverse sliding hole II are respectively sleeved on the mounting column A and the mounting column B, and can be slidably matched.

[0019] The pressure spring is arranged between the circular protrusion and the inner side of the side plate of the lock housing;

[0020] The square tongue assembly comprises: a square tongue and a square tongue connecting piece and a sliding hole arranged on the square tongue connecting piece, wherein the square tongue connecting piece is a double-layer structure and is placed in the groove-shaped structure of the locking piece, one side of which is serrated and slidably matched with the paddle, and the other side is provided with a limiting groove and slidably matched with the limiting plate, and a through vertical sliding hole is provided on the double-layer square tongue connecting piece, and is sleeved on the mounting column B and can be slidably matched;

[0021] The hook tongue comprises a head, a middle part and a tail part, the tail part has a connecting hole and is sleeved on the shaft section above the handle connecting rod, the head part is hook-shaped, and the middle part is provided with a through hole;

[0022] One end of the torsion spring is sleeved with the mounting column C, and the other end is sleeved with the through hole;

[0023] The lock tongue housing also includes: a hook clip that matches the hook tongue portion;

[0024] The square tongue of the square tongue assembly presses the side end surface of the hook tongue tail when locked.

[0025] Preferably, the lock bolt of the inner lock body is connected to the lock bolt of the outer lock body through a connecting rod, so that the lock can be unlocked from both inside and outside.

[0026] Preferably, the hook tongue portion is engaged with the hook clip.

[0027] Preferably, the limiting groove comprises at least one.

[0028] Preferably, the vertical sliding hole is sleeved on the mounting column B to guide the square tongue connecting piece to slide vertically in the locking piece.

[0029] Preferably, the transverse sliding hole I and the transverse sliding hole II are respectively sleeved on the mounting column A and the mounting column B to guide the locking plate to slide transversely.

[0030] Preferably, the pressure spring is used for resetting the locking plate.

[0031] Preferably, the handle is rotated to rotate the hook tongue around the handle connecting rod, so that the head of the hook tongue passes through the corresponding lock tongue opening I and lock tongue opening II to engage with the hook in the lock tongue housing.

[0032] Beneficial Effects

[0033] The double-door lock provided by the present invention not only enhances the safety performance of the lock, but also enhances the reliability of the lock, thereby providing users with a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is an assembly diagram of the lock of the present invention;

[0035] Figure 2 is a structural schematic diagram of the lock housing;

[0036] Figure 3 is a structural schematic diagram of the lock tongue housing;

[0037] Figure 4 is a schematic structural diagram of the locking piece;

[0038] Figure 5 is a structural schematic diagram of the square tongue assembly;

[0039] Figure 6 is a schematic structural diagram of the hook tongue;

[0040] Figure 7 is a schematic structural diagram of the rotating paddle;

[0041] Figure 8 This is the state diagram after unlocking;

[0042] Fig. 9 This is the state diagram after locking. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In one embodiment, if Figure 1-9As shown, a double-door lock comprises a lock body and a lock tongue housing, wherein the lock body and the lock tongue housing are symmetrically installed on the inner and outer sides of the double door in pairs, and the lock body comprises: a lock housing (1), a lock core (2), a lock bolt (3), a lock housing bottom plate (4), a handle, and a handle connecting rod (5), wherein:

[0045] The lock housing (1) comprises: a lock hole (6), a handle hole (7), a mounting column A (8), a mounting column B (9) and a mounting column C (10) arranged on the inner surface of the lock housing (1), and a lock tongue opening I (11) arranged on the side plate of the lock housing (1);

[0046] The lock core (2) is installed in the lock hole (6) and is sleeved with a lock bolt (3);

[0047] The lock housing bottom plate (4) is used to seal the lock housing (1) and the components therein;

[0048] The two ends of the handle connecting rod (5) respectively pass through the handle connecting rod hole (12) on the lock housing bottom plate (4) symmetrically installed inside and outside and the handle hole (7) on the lock housing (1) to be connected to the handle;

[0049] The lock tongue housing (13) comprises: a lock tongue opening II (14) arranged on a side plate of the lock tongue housing (13);

[0050] The lock tongue housing bottom plate (15) is used to seal the lock tongue housing (13) and the components therein;

[0051] The lock body further comprises: a rotating paddle (16), a locking plate (17), a square tongue assembly (18), a pressure spring (19), a hook tongue (20), and a torsion spring (21), wherein:

[0052] The rotating paddle (16) comprises: a rotating paddle body (22), an inner circular hole (23) at the center of the rotating paddle body (22), and a paddle (24) arranged at the outer edge of the rotating paddle body (22) and extending vertically, wherein: the inner circular hole (23) is sleeved in the annular groove at the top of the lock bolt (3), and the rotating paddle body (22) is fixed to the lock bolt (3) by a snap ring (25), so that the rotating paddle body (22) can rotate with the rotation of the lock bolt (3);

[0053] The locking piece (17) is a groove-shaped structure, one side of which is a sawtooth-shaped structure (39) and is slidably matched with the paddle (24). The setting of the sawtooth-shaped structure can enable the locking piece (17) to move when the paddle (24) is turned. A limit plate (26) is provided at the inner lower part of the groove-shaped structure on the other side, and a circular protrusion (27) is provided at the outer side. The groove wall has a through transverse sliding hole I (28) and a transverse sliding hole II (29). The transverse sliding hole I (28) and the transverse sliding hole II (29) are respectively sleeved on the mounting column A (8) and the mounting column B (9), and can be slidably matched, so as to guide the locking piece (17) to move on the mounting column A (8) and the mounting column B (9).

[0054] The pressure spring (19) is arranged between the circular protrusion (27) and the inner side of the side plate of the lock housing (1), and its purpose is to reset the lock plate (17) which is laterally displaced when the paddle (24) is moved;

[0055] The square tongue assembly (18) comprises: a square tongue (30) and a square tongue connecting piece (31) and a vertical sliding hole (32) arranged on the square tongue connecting piece (31), wherein the square tongue connecting piece (31) is a double-layer structure and is placed in the groove structure of the locking piece (17), one side of which is a sawtooth structure (40) and is slidably matched with the paddle (24), and the other side is provided with a limiting groove (33) and is slidably matched with the limiting plate (26), and the vertical sliding hole (32) is sleeved on the mounting column B (9) and can be slidably matched;

[0056] The hook tongue (20) comprises a head, a middle part and a tail part, the tail part has a connecting hole (34) and is sleeved on the upper shaft section of the handle connecting rod (12), the head part is hook-shaped, and the middle part is provided with a through hole (35);

[0057] One end of the torsion spring (21) is sleeved with the mounting column C (10), and the other end is sleeved with the through hole (35);

[0058] The lock tongue housing (13) further comprises: a hook (36) matched with the head of the hook tongue (20);

[0059] The square tongue (30) of the square tongue assembly (18) presses against the side end surface (37) of the tail of the hook tongue (20) when locking, thereby locking the hook tongue (20).

[0060] In one embodiment, if Figure 1 As shown, the lock bolt (3) of the inner lock body is connected to the lock bolt (3) of the outer lock body via a connecting rod (38), so that the lock can be opened from both inside and outside.

[0061] In one embodiment, if Fig. 9As shown, the head of the hook tongue (20) is engaged with the hook clip (36) to lock the double-open door.

[0062] In one embodiment, if Figure 5 As shown, the limiting groove (33) includes three limiting grooves (33), and the tongue assembly (18) is slid (moved) vertically up and down through the three limiting grooves (33).

[0063] In one embodiment, if Figure 1 , 5 As shown in FIGS. 8 and 9 , the vertical sliding hole (32) is sleeved on the mounting column B (9) to guide the square tongue connecting piece (31) to slide vertically in the locking piece (17).

[0064] In one embodiment, if Figure 1 , 2 As shown in FIGS. 4, 8 and 9, the transverse sliding hole I (28) and the transverse sliding hole II (29) are respectively mounted on the mounting column A (8) and the mounting column B (9) to guide the locking plate (17) to slide transversely.

[0065] In one embodiment, if Figure 1 , 8 As shown in Figure 9, the pressure spring (19) is used to reset the locking plate (17).

[0066] In one embodiment, if Figure 1 , 8 As shown in FIG. 9 , the handle is used to rotate the hook tongue (20) around the handle connecting rod (12) so that the head of the hook tongue (20) passes through the corresponding lock tongue opening I (11) and lock tongue opening II (14) and engages with the hook (36) in the lock tongue housing (13).

[0067] In one embodiment, if Figure 1-9As shown, when it is necessary to lock the door, the handle is turned by hand, and the rotation of the handle connecting rod (12) drives the hook tongue (20) to rotate around the handle connecting rod (12) as the axis, so that the head of the hook tongue (20) is engaged with the hook card (36) in the lock tongue shell (13), and then the key is used to unlock the door, and the lock cylinder (2) is rotated clockwise to drive the lock bolt (3) to rotate, thereby driving the rotating paddle (16) to rotate, and the paddle (24) of the rotating paddle (16) is slidably matched with the lock plate (17) and the square tongue assembly (18), and at the same time, the lock plate (17) moves horizontally along the horizontal sliding hole I (28) and the horizontal sliding hole II (29) along the mounting column I (8) and the mounting column (9) toward one side of the lock shell (1), and the vertical sliding hole (32) of the square tongue assembly (18) moves downward along the mounting column (9), so that the end of the square tongue (30) moves down to the side end (37) of the hook tongue (20). On, the hook tongue (20) is pressed tightly so that the hook tongue (20) is locked.

[0068] In one embodiment, if Figure 1-9 As shown, when the door needs to be opened, the key is rotated counterclockwise to drive the lock core (2) to rotate, drive the lock bolt (3) to rotate, and then drive the rotating paddle (16) to rotate, so that the paddle (24) slides with the lock plate (17) and the tongue assembly (18), and at the same time, the reset lock plate (17) moves laterally along the transverse sliding hole I (28) and the transverse sliding hole II (29) along the mounting column I (8) and the mounting column (9) to one side of the lock housing (1), and the tongue assembly (18) is locked. The vertical sliding hole (32) of the assembly (18) moves upward along the mounting column (9), so that the end of the square tongue (30) moves upward, so that the square tongue (30) is separated from the side end (37) of the hook tongue (20). Then, the handle is turned by hand, and the rotation of the handle connecting rod (12) drives the hook tongue (20) to rotate around the handle connecting rod (12) as the axis, so that the head of the hook tongue (20) is separated from the hook card (36) in the lock tongue housing (13) and returns to its original position, and the door can be opened.

[0069] In one embodiment, if Figure 1-9 As shown, the function of the torsion spring (21) is that after the handle is rotated to a certain angle, the torsion spring (21) can change the direction of the force so that the hook tongue (20) is pushed to the position of the hook card (36) or returns to the original position (unlocked position) under the force of the torsion spring (21) changing the direction.

Claims

1. A double door lock, comprising a lock body and a lock tongue housing, wherein the lock body and the lock tongue housing are symmetrically installed on the inner and outer sides of the double door in pairs, and the lock body comprises: Lock case, lock core, lock bolt, lock case bottom plate, handle, handle connecting rod, wherein: The lock housing comprises: a lock hole, a handle hole, a mounting column A, a mounting column B and a mounting column C arranged on the inner surface of the lock housing, and a lock tongue opening I arranged on the side plate of the lock housing; The lock core is installed in the lock hole and is sleeved with a lock bolt; The lock housing bottom plate is used to enclose the lock housing and the components therein; The two ends of the handle connecting rod are respectively connected to the handle by passing through the handle connecting rod hole on the lock shell bottom plate which is symmetrically installed inside and outside and the handle hole on the lock shell; The lock tongue housing comprises: a lock tongue opening II arranged on a side plate of the lock tongue housing; The lock tongue housing bottom plate is used to enclose the lock tongue housing and the components therein; Features: The lock bolt of the inner lock body is connected to the lock bolt of the outer lock body through a connecting rod, so that the lock can be opened from both inside and outside; The lock body further comprises: a rotating paddle, a locking plate, a square tongue assembly, a pressure spring, a hook tongue, and a torsion spring, wherein: The rotating paddle comprises: a rotating paddle body, an inner circular hole at the center of the rotating paddle body, and a paddle arranged at the outer edge of the rotating paddle body and extending vertically, wherein: The inner circular hole is sleeved in the annular groove at the top of the lock bolt and fixed with a snap ring; The locking piece is a groove-shaped structure, one side of which is a sawtooth-shaped structure and is slidably matched with the paddle, a limit plate is provided at the inner lower part of the groove-shaped structure on the other side, and a circular protrusion is provided at the outer side, and the groove wall has a through transverse sliding hole I and a transverse sliding hole II, and the transverse sliding hole I and the transverse sliding hole II are respectively sleeved on the mounting column A and the mounting column B, and can be slidably matched; The pressure spring is arranged between the circular protrusion and the inner side of the side plate of the lock housing; The square tongue assembly comprises: a square tongue and a square tongue connecting piece and a sliding hole arranged on the square tongue connecting piece, wherein the square tongue connecting piece is a double-layer structure and is placed in the groove-shaped structure of the locking piece, one side of which is serrated and slidably matched with the paddle, and the other side is provided with a limiting groove and slidably matched with the limiting plate, and a through vertical sliding hole is provided on the double-layer square tongue connecting piece, and is sleeved on the mounting column B and can be slidably matched; The hook tongue comprises a head, a middle part and a tail part, the tail part has a connecting hole and is sleeved on the shaft section above the handle connecting rod, the head part is hook-shaped, and the middle part is provided with a through hole; One end of the torsion spring is sleeved with the mounting column C, and the other end is sleeved with the through hole; The lock tongue housing further comprises: a hook clip matched with the hook tongue portion, the hook clip being engaged with the hook tongue portion; The square tongue of the square tongue assembly presses the side end surface of the hook tongue tail when locked.

2. A double door lock according to claim 1, characterized in that: The limiting groove includes at least one.

3. A double door lock according to claim 1, characterized in that: The vertical sliding hole is sleeved on the mounting column B to guide the square tongue connecting piece to slide vertically in the locking piece.

4. A double door lock according to claim 1, characterized in that: The transverse sliding hole I and the transverse sliding hole II are respectively sleeved on the mounting column A and the mounting column B to guide the locking plate to slide transversely.

5. A double door lock according to claim 1, characterized in that: The pressure spring is used for resetting the locking plate.

6. A double door lock according to claim 1, characterized in that: The handle is rotated to rotate the hook tongue with the handle connecting rod as the axis, so that the head of the hook tongue passes through the corresponding lock tongue opening I and lock tongue opening II and is engaged with the hook in the lock tongue housing.

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