Rotary crank lock

Abstract

The utility model relates to a rotary crank lock, which comprises a lock shell with a handle groove, a handle, a rotating mechanism and a handle limiting mechanism, a pivoting hole is arranged in the handle groove, the rotating mechanism comprises a pivoting seat and a pivoting shaft, the pivoting seat is rotatably matched on the pivoting hole, the pivoting end of the handle is rotatably matched on the pivoting seat through the pivoting shaft, and the handle limiting mechanism is arranged on the handle limiting mechanism. The handle limiting mechanism comprises a limiting fulcrum arranged at the pivoting end of the handle, an avoiding groove and a supporting wall, the avoiding groove and the supporting wall are correspondingly matched with the limiting fulcrum and distributed in the circumferential direction of the pivoting base, the handle limiting mechanism further comprises a protective gasket, and the protective gasket is fixed to the bottom wall of the handle groove of the lock shell in a circumferential locking mode. The protection gasket and the pivoting hole are coaxial, the pivoting base penetrates through the hole of the protection gasket, the pivoting end of the handle corresponds to the protection gasket in position, and an avoiding groove and a supporting wall which are distributed in the circumferential direction are arranged on the wall, facing the pivoting end of the handle, of the protection gasket. By adopting the design of the protective gasket, the lock shell is effectively protected from being extruded and damaged.

Description

Technical Field

[0001] The utility model relates to a lock, in particular to a rotary crank lock. Background Art

[0002] The handle of the rotary crank lock is assembled to the lock shell through a rotating mechanism. The rotating mechanism includes a pivot seat, which is rotatably arranged on the lock shell. The handle is rotatably mounted on the pivot seat through a mounting shaft. In this way, the handle has two moving tracks relative to the lock shell. One is to rotate relative to the pivot seat under the guidance of the mounting shaft to pop out or buckle into the handle slot of the lock shell (then the handle is in an expanded or closed state on the lock shell), and the other is to deflect laterally toward the handle slot under the guidance of the pivot seat to complete the unlocking action. This makes it easy for the handle to be misoperated during the use of the crank lock, causing the handle to crush the lock shell.

[0003] To solve the above technical problems, the "Anti-friction Structure between the Handle and the Base of the Crank Lock" disclosed in the patent document with authorization announcement number CN 205089060 U adopts a fulcrum set at the pivot mounting end of the handle and an avoidance groove set on the lock shell (the base in the document). Only when the handle rotates around the pivot seat (the first pivot in the document) to a closed angle facing the handle groove, the fulcrum corresponds to the position of the avoidance groove, and the handle can be buckled into the handle groove in a closed state. Similarly, when the handle has not popped out of the handle groove and is in place, the fulcrum corresponds to the avoidance groove, and the handle cannot be rotated smoothly around the pivot seat. When the handle rotates around the pivot seat (the first pivot in the document) to a non-closed angle offset from the handle groove, the fulcrum and the avoidance groove are staggered, and the fulcrum and the wall stop on the side of the avoidance groove prevent the handle from being pressed down and buckled into the handle groove. Thereby, the handle is not operated into place and the next operation cannot be performed, thereby avoiding accidental operation of the handle and damaging the lock shell. However, the avoidance groove is directly formed on the lock shell, and the fulcrum is supported by the lock shell wall on the side of the avoidance groove, that is, the fulcrum on the handle still cooperates with the wall around the pivot hole of the pivot seat on the lock shell to achieve the handle position limit. The fulcrum of the handle still has the problem of crushing the lock shell, but the position is changed to the assembly position of the pivot seat on the lock shell. Summary of the invention

[0004] Purpose of the utility model: To overcome the defects of the prior art, the utility model provides a rotary crank lock which adopts a protective gasket design to avoid damage to the lock housing when the handle is limited.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A rotary crank lock comprises a lock shell with a handle groove, a handle, a rotating mechanism and a handle limiting mechanism. A pivot hole is provided in the handle groove, the rotating mechanism comprises a pivot seat and a pivot shaft, the pivot seat is rotatably engaged with the pivot hole, the pivot end of the handle can be rotatably engaged with the pivot seat via the pivot shaft, the handle limiting mechanism comprises a limit fulcrum arranged on the pivot end of the handle, and an avoidance groove and a support wall corresponding to the limit fulcrum, the avoidance groove and the support wall are distributed along the circumference of the pivot seat, and is characterized in that: the handle limiting mechanism also includes a protective washer, the protective washer is fixed on the bottom wall of the handle groove of the lock shell in a circumferentially locked manner, the protective washer is coaxial with the pivot hole, the pivot seat passes through the hole of the protective washer and the pivot end of the handle corresponds to the position of the protective washer, and the wall of the protective washer facing the pivot end of the handle has avoidance grooves and support walls distributed along the circumference.

[0007] Preferably, a gasket groove is recessed on the bottom wall of the handle groove of the lock housing, and the protective gasket is installed in the gasket groove.

[0008] Preferably, a positioning pit and a press-fitting hole are provided on the bottom wall of the gasket groove, and a positioning protrusion and a press-fitting column are provided on the bottom of the protective gasket. The positioning protrusion is inserted into the positioning pit, and the press-fitting column is press-fitted into the press-fitting hole.

[0009] Preferably, the pivot seat includes a mounting shaft section and a head for mounting the handle, the diameter of the mounting shaft section is larger than the diameter of the head, the protective gasket has an inner edge protruding radially inward from the mounting shaft section and matching the diameter of the head, and the support wall extends to the inner edge.

[0010] Preferably, a mounting buckle is provided on the outer side of one end of the lock shell opposite to the pivot hole, and the mounting buckle includes a buckle base, and a locking finger protrudes outward from the buckle base. The lock shell is provided with an insertion cavity with an insertion opening opened along the left and right lateral directions of the lock shell, and an insertion seat is formed on the buckle base, and the insertion seat is inserted into the insertion cavity along the left and right lateral directions of the lock shell.

[0011] Preferably, an elastic support plate is provided at the bottom of the buckle base, and a boss supporting the elastic support plate is provided on the lock shell. The elastic support plate is supported on the boss and provides elastic buckle force for the card finger, and there is a matching amount of movement between the insertion seat and the insertion cavity.

[0012] Preferably, the elastic support plate is arched, a positioning recess is provided in the middle of the elastic support plate, and the boss is inserted into the positioning recess.

[0013] By adopting the above technical solution, a special protective gasket is used to match the fulcrum on the handle. In this way, the protective gasket can be designed with a material different from that of the lock shell to provide more appropriate protection. When the handle is operated incorrectly, the fulcrum of the handle will be pressed against the protective gasket without causing damage to the lock shell; it is also convenient for later replacement and maintenance. At the same time, the lock is installed by means of the installation buckle, which has the advantage of convenient lock installation. The installation buckle is assembled to the lock shell in an insertion manner, which can be replaced, and the insertion manner is along the left and right directions of the lock shell, which is perpendicular to the direction of the force of the installation buckle elastically clamped on the door panel, thereby ensuring that the lock is installed firmly and reliably, and is assembled along the left and right sides, which is convenient for the lock to be fixed on the door panel; the installation buckle relies on a specially formed elastic support plate to provide elastic force. Under this design, when mating, a certain amount of mating activity is allowed between the insertion seat and the insertion cavity of the installation buckle, thereby reducing the processing accuracy requirements of the insertion seat and the insertion cavity, and after assembly, the elastic support plate can provide elastic force to elastically press the insertion seat to fix it, thereby preventing the insertion seat from moving at will in the insertion cavity. At the same time, when the lock is assembled, the activity quota and the elastic support plate are coordinated to provide elastic pressing of the card finger on the door panel.

[0014] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the rotary crank lock of the utility model;

[0016] Figure 2 for Figure 1 Sectional view along line AA;

[0017] Figure 3 for Figure 2 A partial enlarged view of part B;

[0018] Figure 4 for Figure 2 A partial enlarged view of part C in the middle;

[0019] Figure 5 A diagram showing the handle of the rotary crank lock of the utility model in an unfolded state;

[0020] Figure 6 This is an exploded view of the rotary crank lock of the utility model;

[0021] Figure 7 It is a partial exploded view of the buckle installation part of the rotary crank lock of the utility model;

[0022] Figure 8 It is a structural schematic diagram of the protective gasket of the utility model. DETAILED DESCRIPTION

[0023] See attached Figures 1 to 8The utility model discloses a rotary crank lock, comprising a lock housing 1 with a handle groove 11, a handle 2, a rotating mechanism and a handle limiting mechanism. A pivot hole 12 is provided in the handle groove 11. The rotating mechanism comprises a pivot seat 3 and a pivot shaft 4. The pivot seat 3 is rotatably matched with the pivot hole 12. The pivot end 21 of the handle 2 can be rotatably matched with the pivot seat 3 via the pivot shaft 4. The handle limiting mechanism comprises a limit fulcrum 22 provided on the pivot end 21 of the handle 2, and an avoidance groove 51 and a support wall 52 corresponding to the limit fulcrum 22. The avoidance groove 51 and the support wall 52 are distributed along the circumference of the pivot seat 3. The avoidance groove 51 is rotated to the handle groove 11 when the handle 2 rotates to the handle groove 11. When in the facing position, the fulcrum 22 on the handle 2 is inserted to provide a fixed-point locking of the handle. When the handle 2 is misaligned with the handle slot 11, the support wall 52 supports the fulcrum 22, thereby preventing the handle 2 from buckling into the handle slot 11 and moving. The handle limiting mechanism also includes a protective washer 5, which is fixed to the bottom wall of the handle slot 11 of the lock housing 1 in a circumferentially locked manner, that is, the protective washer 5 will not rotate. The protective washer 5 is coaxial with the pivot hole 12, the pivot seat 3 passes through the hole of the protective washer 5, and the pivot end 21 of the handle 2 corresponds to the position of the protective washer 5. The wall of the protective washer 5 facing the pivot end 21 of the handle has a circumferentially distributed avoidance groove 51 and a support wall 52. During the misoperation process when the handle is not in place, the handle squeezes the protective washer instead of squeezing the lock housing. The protective washer can be selected from a suitable material according to needs, such as plastic, and can be replaced and repaired if damaged later.

[0024] A gasket groove 13 is recessed in the bottom wall of the handle groove 11 of the lock housing 1, and the protective gasket 5 is installed in the gasket groove 13. A positioning pit 131 and a press-fitting hole 132 are provided on the bottom wall of the gasket groove 13, and a positioning convex block 53 and a press-fitting column 54 are provided at the bottom of the protective gasket 5. The positioning convex block 53 is inserted into the positioning pit 131, and the press-fitting column 54 is press-fitted into the press-fitting hole 132. The gasket groove is recessed in the bottom wall of the handle groove of the lock housing to provide installation for the protective gasket, which not only makes the protective gasket convenient and reliable in positioning, but also realizes the sinking installation of the protective gasket, making the structure more compact. The protective gasket is positioned by the positioning convex block and fixed by the press-fitting column, which is convenient to install and reliable in anti-rotation locking.

[0025] In order to ensure that the protective washer and the fulcrum are matched, the pivot seat 3 includes a mounting shaft section 31 and a head 32 for mounting the handle, the diameter of the mounting shaft section 31 is larger than the diameter of the head 32, the protective washer 5 has an inner edge 55 that protrudes radially inward from the mounting shaft section 31 and matches the diameter of the head 32, and the support wall 52 extends to the inner edge 55. In this way, the protective washer can be closer to the pivot end of the handle, ensuring that the protective washer has enough parts to support the fulcrum.

[0026] As another embodiment provided by the utility model, it aims to provide a more convenient and reliable installation of the lock. Specifically, a mounting buckle 6 is provided on the outer side of the end of the lock housing 1 opposite to the pivot hole 12. The mounting buckle 6 includes a buckle base 61, and a clamping finger 62 protrudes outward from the buckle base 61. The lock housing 1 is provided with an insertion cavity 14 with an insertion opening opened along the left and right lateral direction of the lock housing 1. An insertion seat 611 is formed on the buckle base 61, and the insertion seat 611 is inserted into the insertion cavity 14 along the left and right lateral direction of the lock housing 1. The mounting buckle is assembled to the lock housing by insertion, and the insertion is along the left and right direction of the lock housing, so that the assembly of the buckle and the clamping operation of the door panel are more convenient. The force of the clamping finger of the mounting buckle pressing on the door panel is perpendicular to the installation direction of the mounting buckle, which can ensure that the mounting buckle is firmly and reliably fixed to the lock housing, and at the same time ensure that the lock is firmly and reliably installed.

[0027] The elastic snapping force of the snapping finger 62 on the door panel can be achieved by relying on the elastic deformation ability of the snapping finger 62 itself. However, for further optimization design, an elastic support plate 63 is provided at the bottom of the snapping base 61, and a boss 15 supporting the elastic support plate 63 is provided on the lock housing 1. The elastic support plate 63 is supported on the boss 15 and provides elastic snapping force for the snapping finger 62. During mating, a certain amount of mating movement is allowed between the insertion seat and the insertion cavity where the snapping is installed, thereby reducing the machining accuracy requirements of the insertion seat and the insertion cavity. After assembly, the elastic support plate can provide elastic force to elastically press the insertion seat to fix it, thereby preventing the insertion seat from moving freely in the insertion cavity. At the same time, when the lock is assembled, the mating movement allows the snapping to be supported by the elastic support plate, thereby achieving elastic compression of the snapping finger on the door panel.

[0028] Furthermore, the elastic support plate 63 is arched, and a positioning recess 631 is provided in the middle of the elastic support plate 63, and the boss 15 is inserted into the positioning recess 631. Under this design, the mounting buckle is reliably positioned to avoid displacement of the mounting buckle, and the arched elastic support plate provides more reliable elastic deformation capability.

Claims

1. A rotary crank lock, comprising a lock housing with a handle groove, a handle, a rotating mechanism and a handle limiting mechanism, wherein a pivot hole is provided in the handle groove, the rotating mechanism comprises a pivot seat and a pivot shaft, the pivot seat is rotatably engaged with the pivot hole, the pivot end of the handle is rotatably engaged with the pivot seat via the pivot shaft, the handle limiting mechanism comprises a limit fulcrum provided on the pivot end of the handle, and an avoidance groove and a support wall corresponding to the limit fulcrum, the avoidance groove and the support wall are distributed along the circumference of the pivot seat, and is characterized in that: The handle limiting mechanism also includes a protective washer, which is fixed on the bottom wall of the handle groove of the lock shell in a circumferentially locked manner. The protective washer is coaxial with the pivot hole. The pivot seat passes through the hole of the protective washer and the pivot end of the handle corresponds to the position of the protective washer. The wall of the protective washer facing the pivot end of the handle has circumferentially distributed avoidance grooves and support walls.

2. The rotary crank lock according to claim 1, characterized in that: A gasket groove is concavely arranged on the bottom wall of the handle groove of the lock housing, and the protective gasket is installed in the gasket groove.

3. The rotary crank lock according to claim 2, characterized in that: A positioning pit and a press-fitting hole are arranged on the bottom wall of the gasket groove, a positioning convex block and a press-fitting column are arranged on the bottom of the protective gasket, the positioning convex block is inserted into the positioning pit, and the press-fitting column is press-fitted into the press-fitting hole.

4. The rotary crank lock according to claim 1, 2 or 3, characterized in that: The pivot seat includes a mounting shaft section and a head for mounting the handle, the diameter of the mounting shaft section is larger than the diameter of the head, the protective gasket has an inner edge that protrudes radially inward from the mounting shaft section and matches the diameter of the head, and the support wall extends to the inner edge.

5. The rotary crank lock according to claim 1, characterized in that: A mounting buckle is provided on the outer side of one end of the lock shell opposite to the pivot hole, and the mounting buckle includes a buckle base, and a locking finger protrudes outward from the buckle base. The lock shell is provided with an insertion cavity with an insertion opening opened along the left and right lateral directions of the lock shell, and an insertion seat is formed on the buckle base, and the insertion seat is inserted into the insertion cavity along the left and right lateral directions of the lock shell.

6. The rotary crank lock according to claim 5, characterized in that: An elastic support plate is provided at the bottom of the buckle base, and a boss supporting the elastic support plate is provided on the lock shell. The elastic support plate is supported on the boss and provides elastic buckling force for the card finger. There is a matching amount of movement between the insertion seat and the insertion cavity.

7. The rotary crank lock according to claim 6, characterized in that: The elastic support plate is arched, a positioning recess is provided in the middle of the elastic support plate, and the boss is inserted into the positioning recess.

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