handle lock

Abstract

The invention relates to a handle lock, the guide connection structure of the lock core protection cover guide arranged on the handle guides the guide slot arranged on the two sides of the handle transversely, the rocker arm mounting seat is arranged on the back side of the handle, the guide rocker arm is pivotally arranged on the rocker arm mounting seat, the guide slot extends along the direction corresponding to the length direction of the handle, the guide slot is adapted to the swing direction of the guide rocker arm, the guide pin of the lock core protection cover is slidably and rotatably supported in the guide slot, the top surface of the handle is provided with the avoiding channel leading to the rocker arm mounting seat, the guide pin of the lock core protection cover extends into the avoiding channel and is hinged to the top end of the guide rocker arm, the guide rocker arm has a vertical position, a first deflection position and a second deflection position, the first deflection position and the second deflection position are respectively located on the two sides of the vertical position, and the lock core protection cover is attached to the handle in the covering position and the opening position. The structure of the lock core protection structure is compact and convenient to use.

Description

Technical Field

[0001] This invention relates to crank locks and belongs to the field of lock technology. Background Technology

[0002] A type of crank lock has its lock cylinder located on the handle. The handle typically has a protective cover for the lock cylinder at the keyhole, providing dust and water protection. Traditionally, the protective cover is fastened to the handle with screws, making opening and closing cumbersome and prone to falling off. Some crank locks have a recessed section on the top surface of the handle. One end of the protective cover is hinged to this recess via a hinge connector. A torsion spring at the hinged end allows the cover to automatically spring open. A latching mechanism is also located at the swinging end of the cover, linking it to the handle. However, this design has the following problems: 1. Opening and closing the cover remains cumbersome, and the hinged installation on the top surface of the handle results in a less compact structure; 2. When opened, the cover lifts off the handle, which is not only unsightly but also interferes with key operation, causing inconvenience in lock use. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects of the existing technology and provide a crank lock with a compact lock cylinder protection structure and convenient use.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A crank lock includes a lock housing with a handle groove and a handle disposed within the handle groove. One end of the handle is rotatably disposed within the handle groove, and the other end of the handle has a lock cylinder seat protruding towards the back of the handle. A lock cylinder is mounted on the lock cylinder seat, and the head end of the lock cylinder is exposed on the top surface of the handle. A lock cylinder protection device is provided on the handle, including a lock cylinder protective cover. The lock cylinder protective cover is connected to the handle via a guide connection structure, which guides the lock cylinder protective cover to move between a covered position and an open position relative to the handle. The guide connection structure includes a pivot pin located at the center of the bottom of the lock cylinder protective cover, a guide pin located at one end of the bottom of the lock cylinder protective cover, and guide grooves located on both lateral sides of the handle. A lock cylinder is provided on the back of the handle. The device has a rocker arm mounting base on which a guide rocker arm is pivotally mounted. The guide rocker arm swings in a direction corresponding to the length of the handle. The extension direction of the guide groove is adapted to the swing direction of the guide rocker arm. The guide pin is slidably and rotatably supported in the guide groove. The top surface of the handle has a clearance channel leading to the rocker arm mounting base. The pivot foot of the lock cylinder protective cover extends into the clearance channel and is hinged to the top of the guide rocker arm. The guide rocker arm has a vertical position perpendicular to the top surface of the handle, a first sway position corresponding to the covered position of the lock cylinder protective cover, and a second sway position corresponding to the open position of the lock cylinder protective cover. The first sway position and the second sway position are located on both sides of the vertical position. The lock cylinder protective cover is against the handle in both the covered and open positions.

[0005] Preferably, the guiding connection structure further includes a swing spring. The fixed pivot end of the guiding rocker arm is provided with a driving arm that rotates with the guiding rocker arm. The driving arm abuts against the swing end of the swing spring. The fixed end of the swing spring abuts against the rocker arm mounting seat. The swing spring is in a compressed state. The driving arm has two extreme positions and a dead point position. The two extreme positions of the driving arm correspond one-to-one with the first and second yaw positions of the guiding rocker arm. The dead point position is located between the two extreme positions. At the dead point position, the axis of the driving arm coincides with the line of action of the spring force formed by the swing spring.

[0006] Preferably, the swing spring is a torsion spring, with mounting rings at both ends. Mounting shafts are provided on both the drive arm and the rocker arm mounting base, and the two mounting rings of the torsion spring are fitted onto the two mounting shafts in a one-to-one correspondence.

[0007] Preferably, the rocker arm mounting base is provided with an arc-shaped guide groove, and the drive arm is provided with a guide protrusion. The guide protrusion is positioned and inserted into the arc-shaped guide groove and slides along the arc-shaped guide groove.

[0008] Preferably, the top surface of the handle is provided with a recess, and the head end of the lock cylinder is correspondingly located in the recess. The recess is for the lock cylinder protective cover in the covered position to be snapped in, so that the top surface of the lock cylinder protective cover in the covered position is flush with the top surface of the handle.

[0009] Preferably, in the direction of movement of the lock cylinder protective cover from the covered position to the open position, the guide groove extends obliquely close to the top surface of the handle, so as to cause the lock cylinder protective cover to be stacked on the handle parallel to the top surface of the handle when it is in the open position.

[0010] Preferably, the guide groove extends from one end near the top surface of the handle to have a disassembly and assembly opening that extends through the top surface of the handle, through which the guide pin is inserted into and slid out of the guide groove.

[0011] Preferably, the lock cylinder protective cover has pivot feet on both sides in the lateral direction, each pivot foot is equipped with a guide rocker arm, the rocker arm mounting base has mounting cavities on both sides in the lateral direction, the clearance channel is connected to the mounting cavity, the guide rocker arm is assembled in the mounting cavity, the mounting cavity has an inner mounting wall, and an outer cover plate is fixedly installed on the inner mounting wall.

[0012] By adopting the above technical solution, the lock cylinder protective cover, guided by the guide rocker arm and guide groove, switches between the covered and open positions along the handle. Correspondingly, the guide rocker arm switches between a first tilting position and a second tilting position. The guide rocker arm has a vertical position between the first and second tilting positions. Therefore, the hinged end of the guide rocker arm and the pivot joint is lower than the vertical position in both the first and second tilting positions. The guide pin at one end of the lock cylinder protective cover is restricted and guided by the guide groove. The lock cylinder protective cover is raised and lowered under the guidance of the guide rocker arm. Specifically, when the guide rocker arm swings to the vertical position, the lock cylinder protective cover is raised; when it enters the first and second tilting positions, the lock cylinder protective cover falls back. The lock cylinder protective cover can rest against the handle in both the covered and open positions, thus preventing the lock cylinder protective cover from tilting up on the handle in the open state, resulting in a cleaner appearance and more convenient use of the lock. The guide rocker arm is installed and arranged using the space on the back of the handle, resulting in a compact structure. 2. The lock cylinder protective cover can reliably and stably remain in both the covered and open positions.

[0013] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a diagram showing the closed state of the lock cylinder protective cover of the crank lock of the present invention; Figure 2 This is a diagram showing the lock cylinder protective cover of the crank lock of the present invention in an open state; Figure 3 This is an exploded view of the lock cylinder protection device of the crank lock of the present invention; Figure 4 This is a schematic diagram of the guide connection structure of the lock cylinder protective cover of the crank lock of the present invention when it is closed; Figure 5 This is a schematic diagram of the guide connection structure of the lock cylinder protective cover of the crank lock of the present invention when it is in the open state; Figure 6This is a schematic diagram of the guide rocker arm of the lock cylinder protection device of the present invention in the vertical position. Detailed Implementation

[0015] See appendix Figures 1-6 This invention discloses a crank lock, comprising a lock housing 1 with a handle groove 11, and a handle 2 disposed within the handle groove 11. One end of the handle 2 is rotatably disposed within the handle groove 11, and the other end of the handle 2 has a lock cylinder seat 21 protruding towards the back of the handle 2. A lock cylinder 3 is mounted on the lock cylinder seat 21, and the head end 31 of the lock cylinder 3 is exposed on the top surface of the handle 2. A lock cylinder protective device is provided on the handle 2, comprising a lock cylinder protective cover 4. The lock cylinder protective cover 4 is connected to the handle 2 via a guide connection structure, which guides the lock cylinder protective cover 4 relative to the handle 2 in a covered position (e.g., ...). Figure 1 and Figure 3 (as shown) and opening position (as shown) Figure 2 and Figure 4 The guide connection structure includes a pivot foot 41 located at the bottom center of the lock cylinder protective cover 4, a guide pin 42 located at one end of the bottom of the lock cylinder protective cover 4, and guide grooves 22 located on both sides of the handle 2. A rocker arm mounting seat 23 is provided on the back side of the handle 2, and a guide rocker arm 5 is pivotally mounted on the rocker arm mounting seat 23. The guide rocker arm 5 swings in a direction corresponding to the length direction of the handle 2. The extension direction of the guide groove 22 is adapted to the swing direction of the guide rocker arm 5. The guide pin 42 is slidably and rotatably supported in the guide groove 22. The top surface of the handle 2 is provided with a clearance channel 24 leading to the rocker arm mounting seat 23. The pivot foot 41 of the lock cylinder protective cover 4 extends into the clearance channel 24 and is hinged to the top of the guide rocker arm 5. The guide rocker arm 5 has a vertical position perpendicular to the top surface of the handle 2 (e.g., Figure 6 As shown), and the position covered by the lock cylinder protective cover 4 (as shown). Figure 4 The first sway position corresponding to (as shown), and the opening position of the lock cylinder protective cover 4 (as shown). Figure 5 As shown, the second tilt position corresponds to the first tilt position and the second tilt position are located on both sides of the vertical position. The lock cylinder protective cover 4 is attached to the handle 2 in both the covered and open positions. The lock cylinder protective cover 4 is associated with the handle 2, making it less likely to be lost and easy to operate; more importantly, as shown... Figure 2 and Figure 4 As shown, when the lock cylinder protective cover 4 is in the covered position and the open position, the lock cylinder protective cover 4 rests against the top surface of the handle 2, thereby preventing the lock cylinder protective cover 4 from protruding too much from the handle 2 when open, resulting in a cleaner appearance and more convenient use of the lock. The guide rocker arm 5 is arranged in the space on the back side of the handle 2, while the guide groove 22 is located on both sides of the handle, resulting in a compact structure.

[0016] To further facilitate the opening and closing of the lock cylinder protective cover, the guide connection structure also includes a swing spring 6. The fixed pivot end of the guide rocker arm 5 is provided with a drive arm 5-1 that rotates with the guide rocker arm 5. In a simpler design, the drive arm 5-1 and the guide rocker arm 5 are integrally formed. The drive arm 5-1 abuts against the swing end of the swing spring 5, and the fixed end of the swing spring 6 abuts against the rocker arm mounting base 23. The swing spring 5 is in a compressed state. The drive arm 5-1 has two extreme positions and one dead point position. The two extreme positions of the drive arm 5-1 correspond one-to-one with the first and second deflection positions of the guide rocker arm 5, that is, they correspond to the covered and open positions of the lock cylinder protective cover 4. The dead point position is located between the two extreme positions. At the dead point position, the axis of the drive arm 5-1 coincides with the line of action of the spring force formed by the swing spring 6. When the lock cylinder protective cover 4 is pushed, in the initial stage, the swing spring is compressed, which drives the swing spring 6 to swing. When the drive arm 5-1 reaches the dead point position, the axis of the drive arm 5-1 coincides with the line of action of the spring force formed by the swing spring 6. Theoretically, without external force input, the drive arm 5-1 can remain at the dead point position. However, under the drive of external force, after the drive arm 5-1 passes the dead point position, the swing spring 6 provides spring force to drive the drive arm 5-1 into the limit position, that is, drive the lock cylinder protective cover 4 into and maintain the covered position or the open position, making the opening and closing operation of the lock cylinder protective cover 4 more convenient, and the covered and open states more stable and reliable. Since it is difficult for the operation of the lock cylinder protective cover to stop at the dead point position of the drive arm during actual operation, the possibility of the lock cylinder protective cover stopping at the dead point position is small, thereby avoiding the lock cylinder protective cover being in a half-open and half-closed intermediate state.

[0017] The swing spring 6 is a torsion spring, with mounting rings 61 at both ends. Mounting shafts are provided on both the drive arm 5-1 and the rocker arm mounting base 23, and the two mounting rings 61 of the torsion spring are fitted onto the two mounting shafts in a one-to-one correspondence. However, as a feasible implementation, the swing spring can also be a helical spring. An arc-shaped guide groove 231 is provided on the rocker arm mounting base 23, and a guide protrusion 5-11 is provided on the drive arm 5-1. The guide protrusion 5-11 is positioned and inserted into the arc-shaped guide groove 231 and slides along the arc-shaped guide groove 231. Similarly, the mounting shafts for mounting the torsion spring can also be confined to slide within the arc-shaped guide groove. In this specific embodiment, pivot feet 41 are provided on both sides of the lock cylinder protective cover 4, and each pivot foot 41 is equipped with a guide rocker arm 5, so that both sides of the lock cylinder protective cover 4 are restricted and guided, making the operation of the lock cylinder protective cover 4 more stable and reliable. Mounting cavities are provided on both sides of the rocker arm mounting base 23, and the guide rocker arm 5 is assembled in the mounting cavity. Correspondingly, the swing spring 6, which is matched with the guide rocker arm 5, is also placed in the mounting cavity. The clearance channel 24 is connected to the mounting cavity. The mounting cavity has an inner mounting wall 232, on which an outer cover plate 233 is fixedly installed. This design not only makes the lock cylinder protective cover installation more stable and reliable, but also has the advantages of simple and convenient assembly operation. In addition, the outer cover plate provides protection for the guide rocker arm and the swing spring. Therefore, as those skilled in the art would readily conceive, a single pivot foot could be provided at the center of the bottom of the lock cylinder protective cover, etc.

[0018] Under the above design, the lock cylinder protective cover has a movement trajectory of rising and falling relative to the top surface of the handle 2 when it is opened and closed. Therefore, a recess 25 can be provided on the top surface of the handle 2, and the head end 31 of the lock cylinder 3 corresponds to the recess 25. The recess 25 is for the lock cylinder protective cover 4 in the covered position to be snapped in, so that the top surface of the lock cylinder protective cover 4 in the covered position is flush with the top surface of the handle 2.

[0019] Along the direction of movement of the lock cylinder protective cover 4 from the covered position to the open position, the guide groove 22 extends obliquely towards the top surface of the handle 2, so that when the lock cylinder protective cover 4 is in the open position, it is stacked on the handle 2 parallel to the top surface of the handle 2. With this design, when the lock cylinder protective cover 4 reaches the open position, the end of the lock cylinder protective cover 4 defined by the guide groove 22 is also raised a certain distance, so that the top surface of the lock cylinder protective cover 4 and the handle 2 remain parallel. The guide groove 22 extends towards the opening position of the lock cylinder protective cover 4 and has a disassembly opening 221 that extends through the top surface of the handle 2. That is, with the guide groove inclined design, it is also the end of the guide groove 22 near the top surface of the handle 2 as shown in the figure. The guide pin 42 is inserted into and slid out of the guide groove 22 through the disassembly opening 221. One end of the guide groove 22 extends to form the disassembly opening 221. During normal use, when the lock cylinder protective cover is slid to the open position, the guide pin is still in the guide groove. When the guide rocker arm is released from the restriction of the lock cylinder protective cover, the guide support can slide out through the disassembly opening to complete the disassembly.

Claims

1. A crank lock, comprising a lock housing with a handle groove, and a handle disposed within the handle groove, one end of the handle being rotatably disposed within the handle groove, and the other end of the handle having a lock cylinder seat protruding towards the back of the handle, a lock cylinder being mounted on the lock cylinder seat, the head end of the lock cylinder being exposed on the top surface of the handle, a lock cylinder protective device being provided on the handle, the lock cylinder protective device comprising a lock cylinder protective cover, the lock cylinder protective cover being connected to the handle via a guide connection structure, the guide connection structure guiding the lock cylinder protective cover to move relative to the handle between a covered position and an open position, characterized in that: The guiding connection structure includes a pivot foot located at the bottom center of the lock cylinder protective cover, a guide pin located at one end of the bottom of the lock cylinder protective cover, and guide grooves located on both sides of the handle. A rocker arm mounting seat is provided on the back side of the handle, and a guide rocker arm is pivotally mounted on the rocker arm mounting seat. The guide rocker arm swings in a direction corresponding to the length direction of the handle. The extension direction of the guide groove is adapted to the swing direction of the guide rocker arm. The guide pin is slidably and rotatably supported in the guide groove. The top surface of the handle has a clearance channel leading to the rocker arm mounting seat. The pivot foot of the lock cylinder protective cover extends into the clearance channel and is hinged to the top of the guide rocker arm. The guide rocker arm has a vertical position perpendicular to the top surface of the handle, a first sway position corresponding to the covered position of the lock cylinder protective cover, and a second sway position corresponding to the open position of the lock cylinder protective cover. The first sway position and the second sway position are located on both sides of the vertical position. The lock cylinder protective cover is in contact with the handle in both the covered position and the open position.

2. The crank lock according to claim 1, characterized in that: The guiding connection structure also includes a swing spring. The fixed pivot end of the guiding rocker arm is provided with a drive arm that rotates with the guiding rocker arm. The drive arm abuts against the swing end of the swing spring. The fixed end of the swing spring abuts against the rocker arm mounting seat. The swing spring is in a compressed state. The drive arm has two extreme positions and a dead point position. The two extreme positions of the drive arm correspond one-to-one with the first and second yaw positions of the guiding rocker arm. The dead point position is located between the two extreme positions. At the dead point position, the axis of the drive arm coincides with the line of action of the spring force formed by the swing spring.

3. The crank lock according to claim 2, characterized in that: The swing spring is a torsion spring, with mounting rings at both ends. Mounting shafts are provided on both the drive arm and the rocker arm mounting base, and the two mounting rings of the torsion spring are fitted onto the two mounting shafts in a one-to-one correspondence.

4. The crank lock according to claim 2, characterized in that: The rocker arm mounting base is provided with an arc-shaped guide groove, and the drive arm is provided with a guide protrusion. The guide protrusion is positioned and inserted into the arc-shaped guide groove and slides along the arc-shaped guide groove.

5. The crank lock according to claim 1, characterized in that: The top surface of the handle has a recess, and the head end of the lock cylinder is located in the recess. The recess allows the lock cylinder protective cover in the covered position to be snapped in, so that the top surface of the lock cylinder protective cover in the covered position is flush with the top surface of the handle.

6. The crank lock according to claim 5, characterized in that: In the direction of movement of the lock cylinder protective cover from the covered position to the open position, the guide groove extends obliquely close to the top surface of the handle, so as to cause the lock cylinder protective cover to be stacked on the handle parallel to the top surface of the handle when it is in the open position.

7. The crank lock according to claim 6, characterized in that: The guide groove extends from one end near the top surface of the handle, with a disassembly and assembly opening that extends through the top surface of the handle. The lead pin is inserted into and slid out of the guide groove through the disassembly and assembly opening.

8. The crank lock according to claim 1, characterized in that: The lock cylinder protective cover has pivot feet on both sides of the horizontal direction. Each pivot foot is equipped with a guide rocker arm. The clearance channel is connected to the mounting cavity. The rocker arm mounting base has mounting cavities on both sides of the horizontal direction. The guide rocker arm is assembled in the mounting cavity. The mounting cavity has an inner mounting wall. An outer cover plate is fixedly installed on the inner mounting wall.

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