Lock cylinder protective cover mounting structure of lock

Abstract

The utility model relates to a lock cylinder protective cover mounting structure of a lock, which is characterized in that a lock cylinder protective cover is configured to have one end limited on a handle, a first state in which the lock cylinder protective cover is overturned and buckled into an upper concave part of the handle to cover a lock cylinder seat hole and a second state in which the lock cylinder protective cover is overturned out of the concave part to expose the lock cylinder seat hole, and the lock cylinder protective cover comprises a cover plate and a connecting block, a first hinge end of one end of the connecting block is hinged to the hinge seat on one side of the concave part, a second hinge end of the connecting block is hinged to the hinge part of the cover plate, and the connecting block can turn around the first hinge end to be in a tilting state that the second hinge end tilts in the concave part and a horizontal state that the second hinge end is buckled into the concave part; the cover plate can rotate relative to the connecting block around the second hinged end, when the lock cylinder protection cover is in the first state, the cover plate and the connecting block are in a straight and flattened state, and when the lock cylinder protection cover is in the second state, the connecting block is tilted, the cover plate is turned over relative to the connecting block, and then the back side of the cover plate is attached to the handle. The lock cylinder protection cover can be attached to the handle after being turned over and opened, and use is safer and more reliable.

Description

Technical Field

[0001] This utility model relates to locks, specifically to the installation structure of a lock cylinder protective cover for covering and protecting the lock cylinder. Background Technology

[0002] To protect the keyhole, existing locks typically feature a lock cylinder cover. This cover protects the keyhole while maintaining a clean and aesthetically pleasing exterior. A common type of lock cylinder cover is the flip-up design, found in numerous product solutions, such as CN217602345U. This design involves a recessed area on the handle surface, with the lock cylinder cover positioned within it, and the cover uses a single-axis hinge. However, this flip-up design causes the lock cylinder cover to tilt upwards on the handle when opened, making it susceptible to damage and, in severe cases, breakage due to accidental stress. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects of the existing technology and provide a lock cylinder protective cover installation structure that allows the flip-type lock cylinder protective cover to be flipped open and then attached to the handle, thereby making it safer and more reliable to use.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A lock cylinder protective cover mounting structure includes a handle and a lock cylinder protective cover. The top surface of the handle has a recess with a built-in lock cylinder mounting hole, and a hinge seat is provided on one side of the recess. The lock cylinder protective cover is configured such that one end is restricted to the handle. The lock cylinder protective cover has a first state of flipping into the recess to cover the lock cylinder mounting hole and a second state of flipping out of the recess to expose the lock cylinder mounting hole. The lock cylinder protective cover includes a cover plate with a hinge portion at one end. The lock cylinder protective cover further includes a connecting block, with each end of the connecting block having a first hinge. The lock cylinder protective cover has a first hinge end and a second hinge end. The first hinge end is hinged to the hinge seat, and the second hinge end is hinged to the hinge part of the cover plate. The connecting block can be rotated around the first hinge end to be in a raised state where the second hinge end is raised in the recess and in a flat state where the second hinge end is snapped into the recess. The cover plate can rotate relative to the connecting block around the second hinge end. In the first state, the cover plate and the connecting block are in a flat and straight state. In the second state, the connecting block is raised and the back side of the cover plate is against the handle after being flipped relative to the connecting block.

[0006] Preferably, a rotation limiting structure is provided between the second hinge end and the hinge portion. The rotation limiting structure is configured to limit the rotation angle of the cover plate relative to the connecting block. The cover plate forms a flipping stroke relative to the connecting block through the rotation limiting structure, and a first flipping position and a second flipping position at both ends of the flipping stroke. In the first flipping position, the cover plate and the connecting block are in a flat state. In the second flipping position, the cover plate and the connecting block are arranged at an angle and the lock cylinder protective cover can enter the second state. Under the restriction of the rotation limiting structure, the cover plate can drive the connecting block to flip around the first hinge end.

[0007] Preferably, the rotation limiting structure includes an arc-shaped groove on the second hinge end and a stop protrusion on the hinge portion. The arc-shaped groove extends along the pivot direction of the cover plate, and has a first limiting stop surface and a second limiting stop surface at both ends of the arc-shaped groove. The stop protrusion is inserted into the arc-shaped groove and stops and cooperates with the first limiting stop surface and the second stop surface.

[0008] Preferably, the hinge portion protrudes from the front side of the cover plate, and a recessed groove is provided in the recess to accommodate the hinge portion.

[0009] Preferably, both the first hinge end and the second hinge end are provided with press-fit through holes. The press-fit through holes include a circular main hole and an anti-rotation side hole connected to one radial side of the circular main hole. A shaft assembly is inserted into the press-fit through hole. The shaft assembly includes a sleeve portion adapted to the circular main hole and a side wing plate adapted to the anti-rotation side hole. A hinge shaft is inserted into the sleeve portion. The hinge shafts of the two hinge ends of the connecting block are respectively fixed on the hinge seat and the hinge portion.

[0010] By adopting the above technical solution, the lock cylinder protective cover features a double-hinged design, allowing for secondary flipping. This ensures the cover fully conforms to the handle in both open and closed states, improving safety and reliability while enhancing the overall neatness and aesthetics. Furthermore, the rotation limit structure design enables the cover plate and connecting block to move in tandem, facilitating a convenient and reliable flipping of the lock cylinder protective cover into place.

[0011] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a first-state diagram of the installation structure of the lock cylinder protective cover of the lock of this utility model;

[0013] Figure 2 This is a second state diagram of the installation structure of the lock cylinder protective cover of the lock of this utility model;

[0014] Figure 3 This is an exploded view of the connecting block of this utility model;

[0015] Figure 4 This is an exploded view of the lock cylinder protective cover installation structure of the lock of this utility model. Detailed Implementation

[0016] See appendix Figures 1-4 This utility model discloses a lock cylinder protective cover mounting structure, including a handle 1 and a lock cylinder protective cover. The top surface of the handle 1 has a recess 11 with a built-in lock cylinder mounting seat hole. A lock cylinder 2 is installed in the lock cylinder mounting seat hole, and the keyhole end of the lock cylinder 2 corresponds to the recess 11. A hinge seat 111 is provided on one side of the recess 11. The lock cylinder protective cover is configured such that one end is restricted to the handle 1. The lock cylinder protective cover has a first state of flipping and snapping into the recess 11 to cover the lock cylinder seat hole (e.g., ...). Figure 1 (as shown) and the second state of turning out the recess 11 to expose the lock cylinder seat hole (as shown) Figure 2 As shown), the lock cylinder protective cover includes a cover plate 3 and a connecting block 4. A hinge portion 31 is provided at one end of the cover plate 3. The connecting block 4 has a first hinge end 41 and a second hinge end 42 at both ends. The first hinge end 41 is hinged to the hinge seat 111 via a hinge shaft 5, and the second hinge end 42 is hinged to the hinge portion 31 of the cover plate 3 via the hinge shaft 5. The connecting block 4 can be rotated around the first hinge end 41 to a tilted state where the second hinge end 42 is tilted up within the recess 11 (e.g., Figure 2 (as shown) and the second hinge end 42 is engaged in the recess 11 in a flat position (as shown) Figure 1 As shown in the diagram, the cover plate 3 can rotate relative to the connecting block 4 around the second hinge end 42. In the first state, the cover plate 3 and the connecting block 4 are in a flat, straight state. In the second state, the connecting block 4 is raised and the cover plate 3 flips relative to the connecting block 4, with the back side of the cover plate 3 resting against the handle 1. (It should be noted that the side of the cover plate 3 that is fastened to the recess 11 is the front side 3a, and the other side opposite to the front side 3a is the back side 3b. That is, when the lock cylinder protective cover covers and protects the lock cylinder, the side facing outward is the back side.) The lock cylinder protective cover achieves a double hinge point design through the connecting block, allowing the lock cylinder protective cover to flip twice. This not only ensures that the lock cylinder protective cover fits against the handle when covering the lock cylinder, but also allows the cover plate to rest against the handle when flipped out of the recess, thus avoiding the problem of traditional lock cylinder protective covers lifting up on the handle and being easily broken when opened.

[0017] The double-hinged design of the lock cylinder protective cover brings another problem: without special constraints, the connecting block often does not easily swing into place when the cover plate is flipped, which makes the use of the lock cylinder protective cover inconvenient. To address this, the following optimization design is adopted: a rotation limiting structure is provided between the second hinge end 42 and the hinge part 31. The rotation limiting structure is configured to limit the rotation angle of the cover plate 3 relative to the connecting block 4. The cover plate 3 forms a flipping stroke relative to the connecting block 4 through the rotation limiting structure, and a first flipping position and a second flipping position at both ends of the flipping stroke. In the first flipping position, the cover plate 3 and the connecting block 4 are in a flat state. In the second flipping position, the cover plate 3 and the connecting block 4 are arranged at an angle and the lock cylinder protective cover can enter the second state. Under the restriction of the rotation limiting structure, the cover plate 3 can drive the connecting block 4 to flip around the first hinge end 41. When the cover plate is flipped to a certain angle, that is, after the valve cover has flipped relative to the connecting block through the flipping stroke, the cover plate 3 and the connecting block 4 are connected in the corresponding flipping direction through the limiting structure. When the cover plate 3 is flipped again, the connecting block 4 can be flipped synchronously until the lock cylinder protective cover is flipped into place, making the operation simpler and more convenient.

[0018] Specifically, the rotation limiting structure includes an arc-shaped groove 420 on the second hinge end 42 and a stop protrusion 311 on the hinge portion 31. The arc-shaped groove 420 extends along the pivot direction of the cover plate 3, and has a first limiting stop surface 421 and a second limiting stop surface 422 at its two ends. The stop protrusion 311 is inserted into the arc-shaped groove 420 and stops and cooperates with the first limiting stop surface 421 and the second stop surface 422. Of course, as a feasible solution of this utility model, the positions of the stop protrusion and the arc-shaped groove can be interchanged between the second hinge end and the hinge portion; or a hinge shaft can be fixed on the second hinge end or the hinge portion, in which case the hinge shaft becomes part of the second hinge end or the hinge portion, and the stop protrusion can be configured on the hinge shaft.

[0019] To ensure a neat and aesthetically pleasing appearance of the lock, the hinge portion 31 protrudes from the front side 3a of the cover plate 3, and a receiving groove 112 is provided in the recess 11 to accommodate the hinge portion 31. Thus, when the lock cylinder protective cover is in its second state, i.e., after being snapped into the recess, the exposed back side of the lock cylinder protective cover is flat, resulting in a neat and aesthetically pleasing handle appearance.

[0020] To facilitate a more convenient and reliable protective design at the hinge position of the lock cylinder protective cover, a corresponding rotation protection structure is designed on the connecting block. Specifically, both the first hinge end 41 and the second hinge end 42 are provided with press-fit through holes 4-1. The press-fit through hole 4-1 includes a circular main hole 4-11, and an anti-rotation side hole 4-12 is connected to one radial side of the circular main hole 4-11. A shaft assembly 4-2 is inserted into the press-fit through hole 4-1. The shaft assembly 4-2 includes a sleeve portion 4-21 adapted to the circular main hole 4-11 and a side wing plate 4-22 adapted to the anti-rotation side hole 4-12. A hinge shaft 5 is inserted into the sleeve portion 4-21. The hinge shafts of the two hinge ends of the connecting block are respectively fixed on the hinge seat and the hinge portion. The shaft assembly provides the contact point for relative rotation of the hinge shaft. The shaft assembly can be made of wear-resistant material to achieve protection. The shaft assembly on the connecting block has the advantages of simple structure and convenient assembly.

Claims

1. A lock cylinder protective cover mounting structure for a lock, comprising a handle and a lock cylinder protective cover, wherein the top surface of the handle has a recess with a built-in lock cylinder mounting hole, a hinge seat is provided on one side of the recess, the lock cylinder protective cover is configured such that one end is restricted to the handle, the lock cylinder protective cover has a first state of flipping into the recess to cover the lock cylinder mounting hole and a second state of flipping out of the recess to expose the lock cylinder mounting hole, the lock cylinder protective cover includes a cover plate, and a hinge portion is provided at one end of the cover plate, characterized in that: The lock cylinder protective cover also includes a connecting block. The two ends of the connecting block have a first hinge end and a second hinge end, respectively. The first hinge end is hinged to the hinge seat, and the second hinge end is hinged to the hinge part of the cover plate. The connecting block can be rotated around the first hinge end to be in a raised state where the second hinge end is raised in the recess and in a flat state where the second hinge end is snapped into the recess. The cover plate can rotate relative to the connecting block around the second hinge end. In the first state, the cover plate and the connecting block are in a flat and straight state. In the second state, the connecting block is raised and the back side of the cover plate is against the handle after being flipped relative to the connecting block.

2. The lock cylinder protective cover mounting structure of the lock according to claim 1, characterized in that: A rotation limiting structure is provided between the second hinge end and the hinge part. The rotation limiting structure is configured to limit the rotation angle of the cover plate relative to the connecting block. The cover plate forms a flipping stroke relative to the connecting block through the rotation limiting structure, and a first flipping position and a second flipping position at both ends of the flipping stroke. In the first flipping position, the cover plate and the connecting block are in a flat state. In the second flipping position, the cover plate and the connecting block are arranged at an angle and the lock cylinder protective cover can enter the second state. Under the restriction of the rotation limiting structure, the cover plate can drive the connecting block to flip around the first hinge end.

3. The lock cylinder protective cover mounting structure of the lock according to claim 2, characterized in that: The rotation limiting structure includes an arc-shaped groove on the second hinge end and a stop protrusion on the hinge portion. The arc-shaped groove extends along the pivot direction of the cover plate, and has a first limiting stop surface and a second limiting stop surface at both ends of the arc-shaped groove. The stop protrusion is inserted into the arc-shaped groove and stops and cooperates with the first limiting stop surface and the second stop surface.

4. The lock cylinder protective cover mounting structure of the lock according to claim 1, 2, or 3, characterized in that: The hinge portion protrudes from the front side of the cover plate, and a recessed groove is provided in the recess to accommodate the hinge portion.

5. The lock cylinder protective cover mounting structure of the lock according to claim 1, characterized in that: Both the first hinge end and the second hinge end are provided with press-fit through holes. The press-fit through holes include a circular main hole and an anti-rotation side hole connected to one radial side of the circular main hole. A shaft assembly is inserted into the press-fit through hole. The shaft assembly includes a sleeve portion adapted to the circular main hole and a side wing plate adapted to the anti-rotation side hole. A hinge shaft is inserted into the sleeve portion. The hinge shafts of the two hinge ends of the connecting block are respectively fixed on the hinge seat and the hinge portion.

Images