A double door lock for easy use

Abstract

The utility model relates to a double-leaf door lock convenient to use, solve the problem that the existing double-leaf door lock structure is complex, and it is inconvenient to use with effort operation, including left outer handle, right outer handle, lock core, lock tongue, lock tongue drive mechanism and door bolt, left outer handle is connected with door body rotation, right outer handle is fixedly connected with door body, and the lock core is located in right outer handle, when using, the key is rotated to left side when unlocking, and the driving link assembly is driven by the driving link assembly and is moved up and unlocked, then the left outer handle is rotated to right, and the door bolt moves to left and unlocks. When locking, the left outer handle is rotated to left, and the door bolt moves to right, under the guidance of the arc-shaped guide surface, only needs the very small thrust of the door bolt, and the lock tongue is rotated to be located on the door bolt and moves, when the lock tongue is aligned with the lock groove, the lock tongue is inserted into the lock groove and locked under the action of gravity, thereby simple structure, and only one hand operation can be carried out when locking, and the safety is high. The right inner handle can control the lock tongue extension and contraction in the door inner side, and the operation is convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of door locks, specifically to a convenient double-leaf door lock. Background Technology

[0002] Door locks are the locking devices installed on the main doors of a building that lead to the outside, to protect personal safety and property. Currently, double-leaf doors are locked using single-sided locks, which have low structural strength and are easily damaged. Existing double-sided locks are either complex to unlock, have high manufacturing costs, and require both hands to operate whether locking or unlocking from the inside or outside of the door, making them laborious and inconvenient to use. Utility Model Content

[0003] The purpose of this utility model is to solve the problems of existing double-leaf door locks being complex in structure, laborious to operate, and inconvenient to use.

[0004] The technical solution adopted to solve the technical problem proposed by this utility model is as follows: The convenient double-leaf door lock of this utility model includes a left outer handle installed on the outside of the left door body, a right outer handle installed on the outside of the right door body, a lock cylinder, a lock tongue, a lock tongue drive mechanism, and a door bolt. The left outer handle is rotatably connected to the door body through a left rotating shaft, and the right outer handle is fixedly connected to the door body. The lock cylinder is located inside the right outer handle. A left housing is provided on the inner side of the left door body, and a right housing is provided on the inner side of the right door body. The door bolt is located below the left and right housings. A left door bolt seat that cooperates with the door bolt is provided on the inner side of the left door body. The door bolt has a lock groove and a tooth groove. The lock tongue is installed on the right housing through a lock tongue mounting rod. The lock tongue is located at the lower right of the lock tongue mounting rod. The lock tongue is configured to cooperate with the lock groove. The left end of the lock tongue mounting rod is rotatably mounted on the right housing. The lock tongue drive mechanism includes... The device includes a linkage assembly for rotating and moving the right end of the latch mounting rod upwards, and a drive component. The lower end of the linkage assembly is connected to the right end of the latch mounting rod. The linkage assembly is movably mounted on the right housing. The drive component is connected to the lock cylinder and has a drive rod that drives the linkage assembly upwards to disengage the latch from the lock groove. The left side of the latch has an arc-shaped guide surface. The right housing has a reset component for pulling the drive rod back to its original position. The inside of the right housing has a right inner handle for internal unlocking connected to the drive component. The right inner handle is rotatably connected to the right housing via a right rotating shaft, which is connected to the drive component. The left housing has a gear transmission assembly that meshes with the toothed groove on the bolt to move the bolt. The inside of the left housing has a left inner handle for internally driving the gear transmission assembly. Both the left outer handle and the left inner handle are connected to the gear transmission assembly.

[0005] The technical solutions that further define this utility model include:

[0006] The linkage assembly includes a first linkage and a second linkage. The first linkage is located above the drive rod. The left side of the first linkage is rotatably connected to the right housing. The right side of the first linkage is rotatably connected to the upper end of the second linkage. The lower end of the second linkage is rotatably connected to the right end of the latch mounting rod.

[0007] The second connecting rod is provided with a limiting groove, and the right housing is provided with a limiting pin that extends into the limiting groove.

[0008] The right housing has a base plate and a sealing plate on its inner side. The first connecting rod is rotatably mounted on the base plate, the limiting pin is fixed on the base plate, the left end of the locking tongue mounting rod is rotatably mounted on the base plate, one end of the driving component passes through the base plate and is connected to the left rotating shaft, and the other end of the driving component passes through the sealing plate and is connected to the right inner handle.

[0009] The driving component includes a first driving component and a second driving component. The first driving component is disposed on the right housing, and the second driving component is rotatably disposed on the first driving component. The driving rod includes a first driving rod disposed on the first driving component and a second driving rod disposed on the second driving component. The first driving component is fixedly connected to the right inner handle, and the second driving component is fixedly connected to the lock cylinder. The reset component includes a first reset elastic component that pulls the first driving rod to reset and a second reset elastic component that pulls the second driving rod to reset.

[0010] The first reset elastic element is a coil spring mounted on the right rotating shaft to drive the right rotating shaft to rotate and reset the first driving element. The second reset elastic element is a reset spring located below the second driving rod. One end of the reset spring is fixedly connected to the second driving rod, and the other end is fixedly connected to the right housing.

[0011] The lower end of the locking tongue is provided with a roller.

[0012] The gear transmission assembly includes a drive gear fixedly connected to the left rotating shaft and a driven gear meshing with the drive gear. The driven gear passes through the left housing and meshes with the tooth groove on the door bolt. The left housing is provided with a left opening for the driven gear to pass through.

[0013] Both the right and left doors are equipped with brackets for supporting door bolts.

[0014] The right door body is provided with a right door bolt seat that cooperates with the door bolt.

[0015] The beneficial effects of this utility model through the above technical solution are as follows: When using the convenient double-leaf door lock of this utility model, to unlock, simply insert the key into the lock cylinder inside the right outer handle of the door body, turn the key to the left, the lock cylinder drives the drive rod to rotate, the drive rod drives the connecting rod assembly to move upward, causing the bolt to disengage from the lock groove. Then turn the left outer handle to the right, the left outer handle drives the gear transmission assembly to rotate, thereby moving the bolt to the left to unlock. When locking, the left part of the bolt is located in the left bolt seat. Turning the left outer handle to the left, the left outer handle drives the bolt to the right through the gear transmission assembly. When the bolt contacts the arc-shaped guide surface on the left side of the bolt, under the guidance of the arc-shaped guide surface, only a small pushing force is needed from the bolt, and the bolt rotates upward and moves onto the bolt. When the bolt aligns with the lock groove, the bolt automatically inserts into the lock groove under the action of gravity to lock the door. Therefore, the structure is simple, unlocking and locking are easy and convenient, locking only requires one hand, and it has high security. Additionally, the latch can be extended or retracted via the right inner handle from the inside of the door, while the left outer handle and left inner handle can control the rotation of the gear transmission assembly to move the bolt, making operation convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the outer structure of the door body of a convenient double-leaf door lock according to this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of a convenient double-leaf door lock according to this utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of a convenient double-leaf door lock according to the present invention.

[0019] Figure 4 This is an exploded structural diagram of a convenient double-leaf door lock according to the present invention.

[0020] Figure 5 This is a schematic diagram of the bolt drive mechanism of a convenient double-leaf door lock according to the present invention.

[0021] In the diagram, the components are: left door body - 10, left outer handle - 11, left housing - 12, left opening - 121, left bolt seat - 13, left inner handle - 14, right door body - 20, right outer handle - 21, right housing - 22, right inner handle - 23, gear transmission assembly - 24, driving gear - 241, driven gear - 242, right bolt seat - 25, limit pin - 26, base plate - 27, sealing plate - 28, lock cylinder - 30, bolt - 40, bolt mounting rod - 41. Arc-shaped guide surface-42, roller-43, latch drive mechanism-50, linkage assembly-51, first linkage-511, second linkage-512, limiting groove-5121, drive member-52, drive rod-521, first drive rod 5211, second drive rod 5212, first drive member 522, second drive member 523, reset member 53, second reset elastic member-531, bolt-60, lock groove-61, tooth groove-62, support-70. Detailed Implementation

[0022] The structure of this utility model will be further described below with reference to the accompanying drawings.

[0023] Reference Figures 1 to 5The convenient double-leaf door lock of this utility model includes a left outer handle 11 installed on the outside of the left door 10, a right outer handle 21 installed on the outside of the right door 20, a lock cylinder 30, a bolt 40, a bolt drive mechanism 50, and a bolt 60. The left outer handle 11 is rotatably connected to the door body via a left pivot, and the right outer handle 21 is fixedly connected to the door body. The lock cylinder 30 is located inside the right outer handle 21. The left door 10 has a left housing 12 on its inner side, and the right door 20 has a right housing 22 on its inner side. The bolt 60 is located below the left housing 12 and the right housing 22. A left bolt seat 13, which mates with the bolt 60, is provided on the inner side of the left door body 10. The bolt 60 has a lock groove 61 and a toothed groove 62. The latch 40 is mounted to the right housing 22 via a latch mounting rod 41. The latch 40 is located to the lower right of the latch mounting rod 41 and mates with the lock groove 61. The left end of the latch mounting rod 41 is rotatably mounted on the right housing 22. The latch drive mechanism 50 includes a right end for pulling the latch mounting rod 41. The linkage assembly 51 and the drive member 52 rotate upwards. The lower end of the linkage assembly 51 is connected to the right end of the latch mounting rod 41. The linkage assembly 51 is movably mounted on the right housing 22. The drive member 52 is connected to the lock cylinder 30. The drive member 52 is provided with a drive rod 521 that drives the linkage assembly 51 upwards to disengage the latch 40 from the lock groove 61. An arc-shaped guide surface 42 is provided on the left side of the latch 40. A reset member 53 is provided on the right housing 22 to pull the drive rod 521 back to its original position. The inner side of the right housing 22... A right inner handle 23 for internal unlocking is provided and connected to the drive unit 52. The right inner handle 23 is rotatably connected to the right housing 22 via a right rotating shaft, which is connected to the drive unit 52. A gear transmission assembly 24 is provided inside the left housing 12, which meshes with the toothed groove 62 on the bolt 60 to drive the bolt 60 to move. A left inner handle 14 is rotatably provided inside the left housing 12 for internally driving the gear transmission assembly 24 to rotate. Both the left outer handle 11 and the left inner handle 14 are connected to the gear transmission assembly 24.

[0024] In this embodiment, the linkage assembly 51 includes a first linkage 511 and a second linkage 512. The first linkage 511 is located above the drive rod 521. The left side of the first linkage 511 is rotatably connected to the right housing 12 and can be rotatably connected to the right housing via a first pin. The right side of the first linkage 511 is rotatably connected to the upper end of the second linkage 512 and can be rotatably connected to the upper end of the second linkage 512 via a second pin. The lower end of the second linkage 512 is rotatably connected to the right end of the latch mounting rod 41 and can be rotatably connected to the right end of the latch mounting rod 41 via a third pin. When the drive rod moves upward, it drives the first linkage to rotate upward, which in turn drives the second linkage to move upward, thereby causing the latch to rotate upward and disengage from the lock groove. In this embodiment, the second linkage 512 is provided with a limiting groove 5121, and the right housing 22 is provided with a limiting pin 26 extending into the limiting groove 5121. The limiting groove is used to limit the vertical displacement of the second link, so that the link assembly can work stably.

[0025] In this embodiment, a base plate 27 and a sealing plate 28 are provided on the inner side of the right housing 22. The first connecting rod 511 is rotatably mounted on the base plate 27, the limiting pin 26 is fixed on the base plate 27, the left end of the locking tongue mounting rod 41 is rotatably mounted on the base plate 27, one end of the driving member 52 passes through the base plate 27 and is connected to the left rotating shaft, and the other end of the driving member 52 passes through the sealing plate 28 and is connected to the right inner handle 23. During installation, the components on the base plate can be installed first and then installed on the right housing, which facilitates assembly and saves costs.

[0026] In this embodiment, the driving component 52 includes a first driving component 522 and a second driving component 523. The first driving component 522 is disposed on the right housing 22, and the second driving component 523 is rotatably disposed on the first driving component 522. The first driving component is provided with a connecting shaft, and the second driving component is provided with a connecting shaft assembly hole that mates with the connecting shaft. The connecting shaft is inserted into the connecting shaft assembly hole. The driving rod includes a first driving rod 5211 disposed on the first driving component 522 and a second driving rod 5212 disposed on the second driving component 523. The first driving component 522 is fixedly connected to the right inner handle 23. Next, the right inner handle is provided with a right inner handle square shaft, and the first driving member is provided with a right inner handle square shaft mounting hole that mates with the right inner handle square shaft. The right inner handle square shaft is inserted into the right inner handle square shaft mounting hole. The second driving member 523 is fixedly connected to the lock cylinder 30. The lock cylinder is provided with a lock cylinder mounting rod, and the second driving member is provided with a lock cylinder mounting rod mounting hole that mates with the lock cylinder mounting rod. The lock cylinder mounting rod is inserted into the lock cylinder mounting rod mounting hole. The reset member 53 includes a first reset elastic member that pulls the first driving rod 5211 to reset and a second reset elastic member 531 that pulls the second driving rod 5212 to reset. In this embodiment, the first reset elastic member is a coil spring provided on the right rotating shaft that drives the right rotating shaft to rotate and drive the first driving member 522 to reset. The second reset elastic member 531 is a reset spring. The reset spring is located below the second driving rod 5212. One end of the reset spring is fixedly connected to the second driving rod 5212, and the other end is fixedly connected to the right housing 22.

[0027] When the right inner handle is turned, it drives the first driving component to rotate via the right pivot, which in turn drives the first driving rod to rotate. The first driving rod drives the first connecting rod to rotate upward, thereby driving the bolt to rotate upward to unlock. At this time, the coil spring retracts. When the right inner handle is released, under the rebound of the coil spring, if there is no obstruction below the bolt, the bolt will fall under gravity. If the bolt aligns with the lock groove, it will insert into the lock groove and lock. When the lock cylinder is turned, it drives the second driving component to rotate, which in turn drives the second driving rod to rotate. The second driving rod drives the first connecting rod to rotate upward, thereby driving the bolt to rotate upward to unlock. At this time, the return spring is in a stretched state. When the lock cylinder is released, under the rebound of the return spring, if there is no obstruction below the bolt, the bolt will fall under gravity. If the bolt aligns with the lock groove, it will insert into the lock groove and lock. This makes it convenient to use.

[0028] In this embodiment, a roller 43 is provided at the lower end of the latch 40. When the latch is unlocked or before it is locked, the latch slides on the bolt. The roller below the latch makes the latch slide smoothly, avoids friction damage, and also makes unlocking and locking easier.

[0029] In this embodiment, the gear transmission assembly 24 includes a driving gear 241 fixedly connected to the left rotating shaft and a driven gear 242 meshing with the driving gear 241. The driven gear 242 passes through the left housing 12 and meshes with the tooth groove 62 on the door bolt 60. The left housing 12 is provided with a left opening 121 for the driven gear 242 to pass through. A left inner handle square shaft is fixedly provided on the left inner handle. The left inner handle square shaft passes through the driving gear and is fixedly connected to the left rotating shaft. When the left outer handle or the left inner handle is rotated, the left outer handle or the left inner handle drives the driving gear to rotate, which in turn drives the driven gear to rotate. The driven gear drives the door bolt to move left and right through the tooth groove on the door bolt to open and lock the door.

[0030] In this embodiment, both the right door body 20 and the left door body 10 are provided with supports 70 for supporting the door bolt 60. This prevents the door bolt 60 from falling off and ensures that the movement of the door bolt 60 is smooth and safe.

[0031] In this embodiment, a right bolt seat 25 is provided on the inner side of the right door body 20 to cooperate with the bolt 60. When locking the door, the left part of the bolt is inserted into the left bolt seat 13, and the right part of the bolt is inserted into the right bolt seat 25, which enhances security.

[0032] When using this convenient double-leaf door lock, to unlock it, simply insert the key into the lock cylinder 30 inside the right outer handle 21 of the door body, turn the key to the left, the lock cylinder 30 drives the drive rod 521 to rotate, the drive rod 521 drives the connecting rod assembly 51 to move upward, causing the lock tongue 40 to disengage from the lock groove 61, and then turn the left outer handle 11 to the right, the left outer handle 11 drives the gear transmission assembly 24 to rotate, thereby causing the door bolt 60 to move to the left to unlock. When locking the door, the left side of the bolt 60 is located within the left bolt 60 seat. Turning the left outer handle 11 to the left causes the bolt 60 to move to the right via the gear transmission assembly 24. When the bolt 60 contacts the arc-shaped guide surface 42 on the left side of the latch 40, the latch 40 rotates upwards and moves onto the bolt 60 under the guidance of the arc-shaped guide surface 42, requiring only a small pushing force from the bolt 60. When the latch 40 aligns with the lock groove 61, it automatically inserts into the lock groove 61 under gravity, locking the door. This design is simple, making unlocking and locking easy and convenient. Locking can be done with just one hand, and it offers high security. Additionally, the right inner handle 23 can control the extension and retraction of the latch 40 from the inside of the door, while the left outer handle 11 and left inner handle 14 can control the rotation of the gear transmission assembly 24 to move the bolt 60, making operation convenient.

[0033] Although specific embodiments of the present invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of the present invention. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of the present invention.

Claims

1. A convenient double-leaf door lock, comprising a left outer handle mounted on the outside of the left door, a right outer handle mounted on the outside of the right door, a lock cylinder, a bolt, a bolt drive mechanism, and a bolt, characterized in that: The left outer handle is rotatably connected to the door body via a left pivot, while the right outer handle is fixedly connected to the door body. The lock cylinder is located inside the right outer handle. A left housing is located on the inner side of the left door body, and a right housing is located on the inner side of the right door body. The bolt is located below the left and right housings. A left bolt seat, which mates with the bolt, is located inside the left door body. The bolt has a lock groove and a toothed groove. The latch is installed to the right housing via a latch mounting rod. The latch is located to the lower right of the latch mounting rod and mates with the lock groove. The left end of the latch mounting rod is rotatably mounted on the right housing. The latch drive mechanism includes a connecting rod assembly for pulling the right end of the latch mounting rod to rotate upwards and a drive component. The lower end of the connecting rod assembly is connected to the latch mounting rod. The right end of the rod is connected to the connecting rod assembly, which is movably mounted on the right housing. The driving component is connected to the lock cylinder. The driving component has a driving rod that drives the connecting rod assembly upward to disengage the lock tongue from the lock groove. The left side of the lock tongue has an arc-shaped guide surface. The right housing has a reset component that pulls the driving rod to reset. The inside of the right housing has a right inner handle for internal unlocking connected to the driving component. The right inner handle is rotatably connected to the right housing via a right rotating shaft, which is connected to the driving component. The left housing has a gear transmission assembly that meshes with the tooth groove on the bolt to drive the bolt to move. The inside of the left housing has a left inner handle for internally driving the gear transmission assembly to rotate. Both the left outer handle and the left inner handle are connected to the gear transmission assembly.

2. The convenient double-leaf door lock as described in claim 1, characterized in that: The linkage assembly includes a first linkage and a second linkage. The first linkage is located above the drive rod. The left side of the first linkage is rotatably connected to the right housing. The right side of the first linkage is rotatably connected to the upper end of the second linkage. The lower end of the second linkage is rotatably connected to the right end of the latch mounting rod.

3. A convenient double-leaf door lock as described in claim 2, characterized in that: The second connecting rod is provided with a limiting groove, and the right housing is provided with a limiting pin that extends into the limiting groove.

4. The convenient double-leaf door lock according to claim 3, characterized in that: The right housing has a base plate and a sealing plate on its inner side. The first connecting rod is rotatably mounted on the base plate, the limiting pin is fixed on the base plate, the left end of the locking tongue mounting rod is rotatably mounted on the base plate, one end of the driving component passes through the base plate and is connected to the left rotating shaft, and the other end of the driving component passes through the sealing plate and is connected to the right inner handle.

5. A convenient double-leaf door lock as described in claim 1, characterized in that: The driving component includes a first driving component and a second driving component. The first driving component is disposed on the right housing, and the second driving component is rotatably disposed on the first driving component. The driving rod includes a first driving rod disposed on the first driving component and a second driving rod disposed on the second driving component. The first driving component is fixedly connected to the right inner handle, and the second driving component is fixedly connected to the lock cylinder. The reset component includes a first reset elastic component that pulls the first driving rod to reset and a second reset elastic component that pulls the second driving rod to reset.

6. A convenient double-leaf door lock as described in claim 5, characterized in that: The first reset elastic element is a coil spring provided on the right rotating shaft to drive the right rotating shaft to rotate and drive the first driving element to reset. The second reset elastic element is a reset spring, which is located below the second driving rod. One end of the reset spring is fixedly connected to the second driving rod, and the other end is fixedly connected to the right housing.

7. A convenient double-leaf door lock as described in claim 1, characterized in that: The lower end of the locking tongue is provided with a roller.

8. A convenient double-leaf door lock as described in claim 1, characterized in that: The gear transmission assembly includes a drive gear fixedly connected to the left rotating shaft and a driven gear meshing with the drive gear. The driven gear passes through the left housing and meshes with the tooth groove on the door bolt. The left housing is provided with a left opening for the driven gear to pass through.

9. The convenient double-leaf door lock according to claim 1, characterized in that: Both the right and left doors are equipped with brackets for supporting door bolts.

10. The convenient double-leaf door lock according to claim 1, characterized in that: The right door body is provided with a right door bolt seat that cooperates with the door bolt.

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