Opening structure of square bar seat of lock body

Abstract

The application discloses a kind of lock body square bar seat opening structure, including lock body shell, square bar seat, driving arm and sub lock tongue component, square bar seat can be rotatably installed in lock body shell, sub lock tongue component can be elastically reciprocatingly slidably installed in lock body shell, and sub lock tongue on sub lock tongue component extends out lock body shell to realize locking door under normal state, square bar seat rotation can drive sub lock tongue component to slide by driving arm so that its sub lock tongue is withdrawn into lock body shell to realize unlocking, a limit sheet is fixed on the circumferential outer side wall of square bar seat, the limit sheet can be connected with lock body shell with opposite rotation setting angle, the two ends of square bar seat reset elastic element elastically deformed in lock body shell are respectively connected with lock body shell and limit sheet, square bar seat reset elastic element provides elastic force for limit sheet so that square bar seat remains in locking position state, the application makes a kind of door handle can adapt to the different installation direction of lock, effectively improve the versatility of lock.

Description

TECHNICAL FIELD

[0001] The present application relates to a door lock, in particular to a lock body square bar seat opening structure. BACKGROUND

[0002] When the door lock is unlocked and the door is opened, the square bar seat is rotated in the lock body to achieve unlocking by rotating the door handle. After unlocking, the door handle needs to be reset to the original state. At present, the rotation angle of the door handle and the reset to the original state are limited by the rotation angle of the door handle on the lock body shell, and the door handle is elastically reset by the door handle reset spring. This structure causes the door handle to have directionality. When the door lock needs to be reversed, a lock with a door handle having different rotation and reset directions needs to be selected, which makes the lock difficult to be universal. SUMMARY

[0003] In order to overcome the above defects, the present application provides a lock body square bar seat opening structure which can be universal for different installation directions of the lock body, and the rotating handle is more comfortable when opening the door.

[0004] The technical scheme adopted by the present application to solve the technical problems is: a lock body square bar seat opening structure, comprising a lock body shell, a square bar seat, a driving arm and a secondary lock tongue assembly. The square bar seat is rotatably installed in the lock body shell. The secondary lock tongue assembly is elastically and reciprocally slidably installed in the lock body shell, and the secondary lock tongue on the secondary lock tongue assembly extends out of the lock body shell to lock the door in the normal state. The square bar seat can drive the secondary lock tongue assembly to slide by the driving arm to make the secondary lock tongue on it retreat into the lock body shell to achieve unlocking. A limiting piece is fixedly arranged on the circumferential outer side wall of the square bar seat. The limiting piece is connected with the lock body shell at a set angle relative to the rotation. The lock body shell further comprises a square bar seat reset elastic member. The two ends of the square bar seat reset elastic member are elastically deformed and connected with the lock body shell and the limiting piece, respectively. The square bar seat reset elastic member provides elastic force to the limiting piece to keep the square bar seat in the locked position state.

[0005] As a further improvement of the present application, an arc-shaped hole with its center on the axis of the square bar seat is arranged on the limiting piece, and a limiting column is fixedly arranged on the inner side wall of the lock body shell.

[0006] Alternatively, an arc-shaped hole with its center on the axis of the square bar seat is arranged on the inner side wall of the lock body shell, and a limiting column is fixedly arranged on the limiting piece.

[0007] The limiting column is inserted into the arc-shaped hole, and the limiting column and the arc-shaped hole can slide relative to each other in the extension direction of the arc-shaped hole. When the limiting column is at one end of the extension direction of the arc-shaped hole, the square bar seat is in the locked position state. When the limiting column is at the other end of the extension direction of the arc-shaped hole, the square bar seat is in the unlocked position state.

[0008] As a further improvement of the present application, the limiting column is a rivet riveted on the inner side wall of the lock body shell or the limiting sheet.

[0009] As a further improvement of the present application, the square bar seat reset elastic member is a torsion spring, a torsion spring mounting shaft is fixedly arranged on the inner side wall of the lock body shell, the coil of the torsion spring is sleeved outside the torsion spring mounting shaft, one leg of the torsion spring is tightly abutted against the inner side wall surface of the lock body shell parallel to the torsion spring mounting shaft, and the other leg of the torsion spring is tightly abutted against the side wall surface of the limiting sheet in the rotating direction of the limiting sheet.

[0010] As a further improvement of the present application, the other leg end of the torsion spring is formed with a bending structure, the side wall surface of the limiting sheet in the rotating direction of the limiting sheet is formed with an open slot structure, and the bending structure of the other leg end of the torsion spring is inserted into the open slot structure and tightly abutted against the bottom surface of the open slot structure.

[0011] As a further improvement of the present application, the driving arm is hingedly arranged on the inner side wall of the lock body shell through a hinge shaft, the driving arm forms a lever structure with the hinge shaft as a fulcrum, a poking protrusion is fixedly arranged on the limiting sheet, a poking step is arranged on the auxiliary lock tongue assembly, and the two end side walls of the driving arm are respectively tightly abutted against the surfaces of the poking protrusion and the poking step.

[0012] As a further improvement of the present application, a bearing is sleeved outside the poking protrusion, and the circumferential outer surface of the bearing can roll along the one end side wall of the driving arm.

[0013] As a further improvement of the present application, a poking protrusion is formed on the other end side wall of the driving arm, and the poking protrusion is in contact with the surface of the poking step on the auxiliary lock tongue assembly through a circular arc surface.

[0014] As a further improvement of the present application, the distance from the contact point of the driving arm and the poking step on the auxiliary lock tongue assembly to the hinge shaft is greater than the distance from the contact point of the driving arm and the poking protrusion on the limiting sheet to the hinge shaft.

[0015] The present application has the following beneficial effects: the present application sets the limiting sheet on the square bar seat, the limiting sheet and the inner side wall of the lock body shell are matched through the limiting column and the arc-shaped hole to limit the rotating angle of the square bar seat, the square bar seat is automatically elastically reset through the square bar seat reset elastic member, the rotating angle limiting structure and the elastic reset structure in the door handle are avoided, and then one door handle can adapt to different installation directions of the lock, the universality of the lock is effectively improved, the driving arm is designed as a lever structure, the square bar seat rolls on the one end side surface of the driving arm through the bearing to drive the driving arm, the torque output by the square bar seat is large, the door lock is opened with less labor, the transmission of the bearing is more comfortable, the overall structure of the present application is simple, and the transmission is smooth. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a front view of the present application;

[0017] Figure 2 is a lock state diagram of the present application;

[0018] Figure 3 is a lock state diagram of the present application. DETAILED DESCRIPTION

[0019] Embodiment: a square bar seat 2 opening structure of a lock body, including a lock body shell 1, a square bar seat 2, a driving arm 3 and a sub-latch assembly 4, the square bar seat 2 is rotatably installed in the lock body shell 1, the sub-latch assembly 4 is elastically reciprocatingly installed in the lock body shell 1, and the sub-latch on the sub-latch assembly 4 extends out of the lock body shell 1 to achieve door locking in normal state, the square bar seat 2 is rotatable to drive the sub-latch assembly 4 to slide through the driving arm 3 to make the sub-latch on it retreat into the lock body shell 1 to achieve unlocking, a limiting piece 5 is fixedly arranged on the circumferential outer side wall of the square bar seat 2, the limiting piece 5 is rotatably connected with the lock body shell 1 at a set angle, and the square bar seat 2 reset elastic member is further arranged in the lock body shell 1, the two ends of the square bar seat 2 reset elastic member elastically deformed are respectively connected with the lock body shell 1 and the limiting piece 5, and the square bar seat 2 reset elastic member provides elastic force for the limiting piece 5 to make the square bar seat 2 remain in the position state of locking.

[0020] By arranging the limiting piece 5 on the circumferential outer side wall of the square bar seat 2, the rotation angle of the limiting piece 5 is limited by the lock body shell 1, thereby limiting the rotation angle of the square bar seat 2, and the square bar seat 2 is automatically elastically reset through the square bar seat 2 reset elastic member, the above structure avoids arranging the rotation angle limiting structure and the door handle elastic reset structure in the door handle, thereby making a door handle adapt to different installation directions of the lock, effectively improving the universality of the lock, greatly simplifying the internal structure of the door handle, and reducing the manufacturing cost and operation failure rate of the door handle.

[0021] An arc-shaped hole 6 with its center located on the axis of the square bar seat 2 is arranged on the limiting piece 5, and a limiting column 7 is fixedly arranged on the inner side wall of the lock body shell 1;

[0022] Alternatively, an arc-shaped hole 6 with its center located on the axis of the square bar seat 2 is arranged on the inner side wall of the lock body shell 1, and a limiting column 7 is fixedly arranged on the limiting piece 5;

[0023] The limiting column 7 is inserted into the arc-shaped hole 6, and the limiting column 7 and the arc-shaped hole 6 can slide relative to each other along the extension direction of the arc-shaped hole 6, when the limiting column 7 is at one end of the extension direction of the arc-shaped hole 6, the square bar seat 2 is in the position state of locking, and when the limiting column 7 is at the other end of the extension direction of the arc-shaped hole 6, the square bar seat 2 is in the position state of unlocking.

[0024] The limiting piece 5 is limited in rotation angle by the limiting column 7 and the arc-shaped hole 6 on the inner wall of the lock body shell 1, which is simple in structure and convenient for production, manufacturing and assembly. In addition, the rotation angle of the limiting piece 5 can also be limited by setting blocking protrusions on both sides of the rotation direction of the limiting piece 5, which are all equivalent replacements that can be thought of by those skilled in the art according to the present application and belong to the protection scope of the present application.

[0025] The limiting column 7 is a rivet arranged on the inner wall of the lock body shell 1 or the limiting piece 5. It can also be a pin, a convex bump or the like, which all belong to the protection scope of the present application.

[0026] The restoring elastic member of the square seat 2 is a torsion spring 8, and a torsion spring mounting shaft 9 is fixedly arranged on the inner wall of the lock body shell 1. The coil of the torsion spring 8 is arranged outside the torsion spring mounting shaft 9. One leg of the torsion spring 8 tightly abuts against the inner wall surface of the lock body shell 1 parallel to the torsion spring mounting shaft 9, and the other leg of the torsion spring 8 tightly abuts against the side wall surface of the limiting piece 5 in the rotation direction thereof. The torsion spring 8 provides a rotating torque for the square seat 2, and the square seat 2 automatically returns to the original position after losing external force. In addition to the torsion spring 8, a compression spring or a tension spring can also be used, which are all equivalent replacements that can be thought of by those skilled in the art according to the present application and belong to the protection scope of the present application.

[0027] The other leg end of the torsion spring 8 is formed with a bending structure, the side wall surface of the limiting piece 5 in the rotation direction thereof is formed with an open groove structure 10, and the bending structure of the other leg end of the torsion spring 8 is inserted into the open groove structure 10 and tightly abuts against the bottom surface of the open groove structure 10. The above structure can improve the stability of the torque provided by the torsion spring 8 for the square seat 2 and prevent the two from being separated.

[0028] The driving arm 3 is hingedly arranged on the inner wall of the lock body shell 1 through a hinge shaft 11. The driving arm 3 forms a lever structure with the hinge shaft 11 as the fulcrum. A poking protrusion 12 is fixedly arranged on the limiting piece 5, and a poking step 13 is arranged on the sub-lock tongue assembly 4. The two end side walls of the driving arm 3 tightly abut against the surfaces of the poking protrusion 12 and the poking step 13, respectively. The driving arm 3 is designed as a lever structure, so that the torque output by the square seat 2 is larger and the door lock is easier to open.

[0029] A bearing 14 is arranged outside the poking protrusion 12. The circumferential outer surface of the bearing 14 can roll along the one end side wall of the driving arm 3. The square seat 2 drives the driving arm 3 by rolling on the one end side wall of the driving arm 3 through the bearing 14. The transmission of the bearing 14 is smoother, the friction is smaller, and the hand feels more relaxed and comfortable when opening the door.

[0030] The driving arm 3 has a push protrusion 15 formed on the side wall of the other end, which is in surface contact with the push step 13 on the sub-latch assembly 4 through a circular arc surface. The surface contact between the circular arc surface and the push step 13 on the sub-latch assembly 4 can reduce friction and interference, and make the unlocking more smooth and easy.

[0031] The distance from the contact point between the driving arm 3 and the push step 13 on the sub-latch assembly 4 to the hinged shaft 11 is greater than the distance from the contact point between the driving arm 3 and the push protrusion 12 on the limiting sheet 5 to the hinged shaft 11. Through the above structure, the door can be opened by gently turning the door handle, which is more labor-saving.

Claims

1. A lock body square bar seat opening structure, comprising a lock body shell (1), a square bar seat (2), a driving arm (3) and an auxiliary lock tongue assembly (4), wherein the square bar seat is rotatably mounted in the lock body shell, the auxiliary lock tongue assembly is elastically slidably mounted in the lock body shell, and under normal conditions, the auxiliary lock tongue on the auxiliary lock tongue assembly extends out of the lock body shell to lock the door, and the square bar seat can rotate to drive the auxiliary lock tongue assembly to slide through the driving arm so that the auxiliary lock tongue on it retreats into the lock body shell to unlock the door, characterized in that: A limiting piece (5) is fixedly provided on the outer circumferential wall of the square bar seat, and the limiting piece can be connected to the lock body shell by a set angle of relative rotation. A square bar seat reset elastic member is also provided in the lock body shell, and the elastically deformed ends of the square bar seat reset elastic member are respectively connected to the lock body shell and the limiting piece. The square bar seat reset elastic member provides elastic force to the limiting piece so that the square bar seat is kept in a locked position. The limiting piece is provided with an arc-shaped hole (6) with the center of the circle on the axis of the square bar seat, and a limiting column (7) is fixedly provided on the inner side wall of the lock body shell. Alternatively, an arc-shaped hole with its center on the axis of the square bar seat is provided on the inner side wall of the lock body shell, and a limiting column is fixed on the limiting piece; The limiting post is inserted into the arc-shaped hole, and the limiting post and the arc-shaped hole can slide relative to each other along the extension direction of the arc-shaped hole. When the limiting post is at one end of the extension direction of the arc-shaped hole, the square bar seat is in a locked position state, and when the limiting post is at the other end of the extension direction of the arc-shaped hole, the square bar seat is in an unlocked position state; The driving arm is hingedly mounted on the inner side wall of the lock body shell via a hinge shaft (11), and the driving arm forms a lever structure with the hinge shaft as a fulcrum. A toggle protrusion (12) is fixedly mounted on the limit plate, and a toggle step (13) is provided on the auxiliary lock tongue assembly. The side walls at both ends of the driving arm are respectively pressed against the toggle protrusion and the toggle step surface.

2. The lock body square bar seat opening structure according to claim 1, characterized in that: The limiting column is a rivet riveted on the inner side wall of the lock body shell or on the limiting plate.

3. The lock body square bar seat opening structure according to claim 1, characterized in that: The square bar seat reset elastic member is a torsion spring (8), and a torsion spring mounting shaft (9) is fixedly provided on the inner side wall of the lock body shell. The coil of the torsion spring is sleeved on the outer side of the torsion spring mounting shaft. One leg of the torsion spring is pressed against the inner side wall surface of the lock body shell parallel to the torsion spring mounting shaft, and the other leg of the torsion spring is pressed against the side wall surface of the limit plate along its rotation direction.

4. The lock body square bar seat opening structure according to claim 3, characterized in that: The other leg end of the torsion spring is formed with a bent structure, and the side wall surface of the limiting plate along its rotation direction is formed with an open groove structure (10), and the bent structure at the other leg end of the torsion spring is inserted into the open groove structure and tightly abuts against the bottom surface of the open groove structure.

5. The lock body square bar seat opening structure according to claim 1, characterized in that: A bearing (14) is sleeved on the outer side of the toggle protrusion, and the outer circumferential surface of the bearing can roll along the side wall of one end of the driving arm.

6. The lock body square bar seat opening structure according to claim 1, characterized in that: A toggle convex point (15) is formed on the side wall of the other end of the driving arm, and the toggle convex point contacts the toggle step surface on the auxiliary lock tongue assembly through an arc surface.

7. The lock body square bar seat opening structure according to claim 1, characterized in that: The distance between the contact point between the driving arm and the toggling step on the auxiliary lock tongue assembly and the hinge axis is greater than the distance between the contact point between the driving arm and the toggling protrusion on the limiting piece and the hinge axis.

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