Child-resistant tamper-resistant padlock

Abstract

This utility model relates to the field of lock technology, specifically a child-proof bar lock, comprising a housing, a lever on the front of the housing, and a fork on the back of the housing connected to the lever. Its key feature is that the front of the housing has a shaped groove, which consists of an upper lever cavity, a lower lever cavity, and a hinged transition groove between the upper and lower lever cavities, with the width of the hinged transition groove being smaller than the widths of the upper and lower lever cavities. One end of the lever is hinged to the hinged transition groove, and the other end is concealed within either the upper or lower lever cavity. A damping structure is also provided at the connection between the lever and the fork. This utility model avoids the lever hitting the user by completely concealing it within the shaped groove, prevents the lever from being stressed when pushing or pulling doors and windows via the upper or lower lever cavity, and increases the difficulty of operating the lever through the damping structure, thus preventing children from accidentally opening doors and windows.

Description

Technical Field

[0001] This utility model relates to the field of locks, and in particular to a strip lock used on aluminum alloy doors and windows. Background Technology

[0002] Bar locks are widely used in sliding doors and windows due to their small size. Current bar lock technology typically uses a sliding bar to move a lever up and down to lock or unlock the door or window. However, children can easily reach into the sliding bar and pull it down, accidentally opening the door or window, posing a significant safety hazard.

[0003] Chinese utility model patent application number 202123189147.4, entitled "A Screen Window Lock with Key and Password Combination," discloses a technical solution in which a handle with a sector gear is hinged to the lock housing. The transmission bar has teeth, so when the handle rotates, the sector gear drives the transmission bar to slide through the teeth, thereby causing a fork or latch on the transmission bar to lock or unlock the door / window. After the door / window is locked, the handle is pressed back into the lock seat to prevent children from accidentally opening the lock. However, this technology has the following technical problems in use:

[0004] First, as shown in the specification of the patent document... Figure 1 As shown, when the lock is in the open position, the handle is pulled up and protrudes outside the lock case; this makes it easy for a person to bump into it when they get close, causing injury. Therefore, this type of lock is only suitable for screen windows that are closed for a long time, and is not suitable for doors and windows that need to be opened frequently, such as balcony doors, room doors, and room windows. Its scope of application is relatively small.

[0005] Secondly, when the doors and windows are opened, they can only be pushed and pulled by the handle, which puts a lot of load on the handle and makes it easy to damage the handle. Therefore, this lock can only be used on very light windows such as screens, and is not suitable for heavy doors and windows such as glass or wood, which further limits its scope of application.

[0006] Given the above-mentioned shortcomings of the existing technology, the applicant believes it is necessary to make technical improvements to provide a more widely applicable bar lock that can prevent children from accidentally opening it. Utility Model Content

[0007] The purpose of this utility model is to solve the above-mentioned problems and shortcomings, and to provide a child-proof bar lock. By completely embedding the lever in the irregular groove, the lever is prevented from hitting the human body when the door or window is opened. Furthermore, the door or window can be pushed or pulled by the upper or lower lever cavity, thereby avoiding stress on the lever when pushing or pulling the door or window, and thus greatly improving the service life of the lever. In addition, the damping structure increases the difficulty of turning the lever, which can also prevent children from accidentally opening the door or window, thereby greatly improving the safety of the door and window.

[0008] The technical solution of this utility model is implemented as follows: a child-proof bar lock includes a housing, a lever on the front of the housing, and a fork on the back of the housing connected to the lever; characterized in that: the front of the housing is provided with an irregular groove, which is composed of an upper lever cavity, a lower lever cavity, and a hinged transition groove between the upper and lower lever cavities, and the width of the hinged transition groove is smaller than the width of the upper and lower lever cavities; one end of the lever is hinged in the hinged transition groove, and the other end of the lever is embedded in the upper or lower lever cavity; a damping structure is also provided at the connection between the lever and the fork.

[0009] Furthermore, a fixed base is provided inside the housing next to the hinge transition groove, and a drive gear is provided inside the fixed base. One side of the drive gear is engaged with the shift fork, and the other side of the drive gear passes through the fixed base and is connected to the shift lever.

[0010] Furthermore, the damping structure is disposed between the fixed base and the connecting side of the lever component; the damping structure consists of a ball groove, a ball, a return spring, and a spring hole.

[0011] Furthermore, the ball groove is composed of two adjacent and interconnected circular grooves formed on the side of the fixed base; the spring hole is provided on the connecting side of the lever.

[0012] Furthermore, the fixed base is also provided with a lock cylinder and a limiting block; the housing is correspondingly provided with a lock hole.

[0013] The beneficial effects of this utility model are:

[0014] Firstly, when the lock is open, the lever is concealed within the upper lever cavity; when locked, it is concealed within the lower lever cavity. This ensures that the lever is completely embedded in the irregular groove and does not protrude from the casing, preventing it from bumping into people. Therefore, it is suitable for balcony doors, room doors, and windows that require frequent opening for entry, exit, or ventilation. Furthermore, when the lock is open, the door or window can be pushed or pulled through either the upper or lower lever cavity. The force for pushing or pulling is borne by the door or window frame, and the lever only functions to open and close the bar lock, unaffected by external forces, thus preventing damage. This makes the invention particularly suitable for heavy doors and windows made of glass or wood, giving it a very wide range of applications.

[0015] Secondly, the width of the hinge transition groove is smaller than the width of the upper and lower lever chambers. This allows for the use of a narrower housing to meet the installation requirements of the lever, resulting in a narrower overall width of the bar lock, making it very suitable for use on narrow-frame sliding doors. Furthermore, the lever part can be made wider than the hinge part, making it more comfortable and convenient to operate, and easier to open or lock the bar lock.

[0016] Furthermore, since a damping structure is provided at the connection between the lever and the fork, a greater force must be used to turn the lever to open the door or window, thus effectively preventing children from accidentally opening the door or window, making this invention very safe. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention in the locked state.

[0018] Figure 2 This is a front view of the present invention in its open state.

[0019] Figure 3 This is a schematic diagram of the disassembled structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the lever component in this utility model.

[0021] Figure 5 This is a schematic diagram of the assembly structure of the shift fork, fixed base, drive gear and lever in the locked state of this utility model.

[0022] Figure 6 This is a schematic diagram of the assembly structure of the shift fork, fixed base, drive gear and lever in the open state of this utility model.

[0023] Figure 7 This is a schematic diagram of the structure of the fixed base in this utility model.

[0024] Figure 8 This is a schematic diagram of the shell structure in this utility model. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0026] like Figure 1 , 2 As shown in Figure 3, the child-proof bar lock of this utility model includes a housing 1, a lever 2 disposed on the front of the housing 1, and a fork 3 disposed on the back of the housing 1 and connected to the lever 2. To achieve the purpose proposed by this utility model, the front of the housing 1 is provided with a shaped groove 11, which is composed of an upper lever cavity 111, a lower lever cavity 112, and a hinge transition groove 113 disposed between the upper lever cavity 111 and the lower lever cavity 112, and the width of the hinge transition groove 113 is smaller than the width of the upper lever cavity 111 and the lower lever cavity 112. One end of the lever 2 is hinged in the hinge transition groove 113, and the other end of the lever 2 is embedded in the upper lever cavity 111 or the lower lever cavity 112. A damping structure 4 is also provided at the connection between the lever 2 and the fork 3. In this way, whether in the open or locked state, the lever 2 is hidden inside the irregular groove, so it will not bump into the human body. Therefore, it can be used on doors and windows in various occasions. Due to the damping structure, a greater force must be used to open the lever 2, which can effectively prevent children from accidentally opening the doors and windows, thereby preventing accidents.

[0027] like Figure 1 , 3 As shown in Figures 5 and 6, a fixed base 5 is also provided inside the housing 1, located beside the hinge transition groove 113. A drive gear 52 is provided inside the fixed base 5. One side of the drive gear 52 is engaged with the fork 3, and the other side of the drive gear 52 passes through the fixed base 5 and is connected to the lever 2. In this way, the lever 2 and the drive gear 52 are coaxially connected together and located on the left and right sides of the side plate of the fixed base 5, respectively. The lever 2 is connected to the fork 3 through the drive gear 52, and when the lever 2 is turned, the fork 3 can be driven to slide, thereby realizing the opening or locking of the lock. In use, as the lever 2 flips from the lower lever cavity 112 to the upper lever cavity 111, the lever 2 drives the drive gear 52 to rotate, which in turn drives the fork 3 to slide downward to open the door or window; conversely, it locks the door or window.

[0028] like Figure 3 , 4As shown, the damping structure 4 is disposed between the fixed base 5 and the connecting side of the lever 2. The damping structure 4 consists of a ball groove 41, a ball 44, a return spring 43, and a spring hole 42. The return spring 43 is placed inside the spring hole 42, and the ball 44 elastically rests on the end of the return spring 43. In this way, when the lever 2 rotates, the return force of the return spring 43 presses the ball 44 between the fixed base 5 and the lever 2, thereby forming a point contact between the lever 2 and the fixed base 5. This not only facilitates the smooth rotation of the lever 2 but also ensures that the ball 44 will not fall out during rotation. Preferably, two sets of damping structures 4 are provided symmetrically arranged between the fixed base 5 and the lever 2. In this way, when the lever 2 reaches the upper lever cavity 112 or the lower lever cavity 111, the ball 44 can fall into the ball groove 41, forming a limiting structure for the lever 2. This allows the lever 2 to be stably placed in the irregular groove 11, and requires a large amount of force to lift the lever 2, further preventing children from accidentally turning the lever 2 and improving safety performance.

[0029] like Figure 3 , 4 As shown in Figure 7, the ball groove 41 is composed of two adjacent and interconnected circular grooves formed on the side of the fixed base 5; the spring hole 42 is provided on the connecting side of the lever 2. In this way, the curved mechanical properties of the circular groove can be used to disperse stress, thereby dispersing the damage to the groove wall caused by the ball 44 when entering and exiting the ball groove 41, and extending its service life.

[0030] like Figure 3 , 5 As shown in Figures 6 and 7, the inner side of the fixed base 5 is also provided with a cavity 50 for accommodating the drive gear 52. The fixed base 5 is also provided with a shaft hole 501 that extends horizontally through the cavity 50 and allows the other side of the drive gear 52 to pass through. In this way, since the drive gear 52 is placed in the cavity 50, the structure of the bar lock is more compact, and the width of the bar lock can be reduced, thus making it suitable for narrow-frame doors and windows. One side of the drive gear 52 passes through the shaft hole 501 and is coaxially connected to the lever 2.

[0031] like Figure 3 , 5 As shown in Figure 6, the shift fork 3 has a rack portion 31 in the middle, which is embedded in the cavity 50 and meshes with the drive gear 52. In this way, the rack portion 31 is integrally formed on the shift fork 3, which not only has a simple structure but is also particularly easy to assemble.

[0032] like Figure 3 , 5As shown in Figure 6, the shift fork 3 has sliding stroke holes 33 at both its upper and lower ends. The housing 1 has screw holes 10 corresponding to the sliding stroke holes 33 and an elongated hole 20 for the rack part 31 to pass through. The shift lever 2 also has a corresponding screw hole (not shown in the figure). During assembly, the shift lever 2 and the drive gear 52 are first assembled on the fixed base 5 and inserted into the housing 1. Then, the rack part 31 of the shift fork 3 is inserted into the housing 1 through the elongated hole 20 and meshed with the drive gear 52. Then, the screw 100 is passed through the sliding stroke holes 33 and the screw holes 10 in sequence and screwed into the screw holes of the fixed base to quickly assemble the components together. In this way, the sliding stroke holes 33 form a clearance for the screw 100, allowing the shift fork 3 to slide smoothly up and down along the housing 1.

[0033] like Figure 3 , 5 As shown in Figure 6, a limiting baffle 32 is also provided on the side of the rack portion 31 on the fork 3 to prevent the drive gear 52 from disengaging. In this way, the drive gear 52 and the rack portion 31 are sandwiched between the limiting baffle 32 and the fixed base 5. During the transmission process, the drive gear 52 is not easy to deviate, so it can mesh and transmit very stably with the rack portion 31, ensuring the reliability of the bar lock.

[0034] like Figure 3 , 7 As shown, the side of the fixed base 5 is also provided with a protrusion 51 that limits the running trajectory of the lever 2. Preferably, a protrusion 51 is provided at the upper and lower ends of the side edge of the fixed base 5. In this way, when the lever 2 is moved to the upper lever cavity 111 or the lower lever cavity 112, the ball 44 can fall into the ball groove 41 very accurately under the limiting action of the protrusion 51. Thus, under the action of the damping structure, the lever 2 can be stably embedded in the upper lever cavity 111 or the lower lever cavity 112.

[0035] like Figure 1 , 5As shown in Figure 6, the fixed base 5 is also provided with a lock cylinder 6 and a limiting block 61; the housing 1 is correspondingly provided with a lock hole 62, and the side of the lever 2 located in the hinge transition groove 113 is correspondingly provided with a limiting hole 63 for locking the lock cylinder 6. In this way, the key can be inserted into the lock cylinder 6 through the lock hole 62, driving the lock cylinder 6 to rotate, thereby causing the lock pin inside the lock cylinder 6 to extend into the limiting hole 63. At the same time, the limiting block 61 positions the lock cylinder 6, thereby locking the lever 2 and firmly locking the door and window, further increasing the security of the door and window. Furthermore, the lock cylinder 6 and the limiting block 61 are arranged side by side, so that the limiting block 61 does not occupy extra space in the width and thickness directions, thereby making the width and thickness of the fixed base 5 smaller, and thus reducing the overall width and thickness of the bar lock, so that this utility model can be applied to extremely narrow door frames, further improving the product's grade and applicability.

Claims

1. A child-proof bar lock, comprising a housing (1), a lever (2) disposed on the front of the housing (1), and a fork (3) disposed on the back of the housing (1) and connected to the lever (2); characterized in that: The front of the housing (1) is provided with an irregular groove (11), which is composed of an upper derailleur cavity (111), a lower derailleur cavity (112) and a hinge transition groove (113) disposed between the upper derailleur cavity (111) and the lower derailleur cavity (112). The width of the hinge transition groove (113) is smaller than the width of the upper derailleur cavity (111) and the lower derailleur cavity (112). One end of the lever (2) is hinged in the hinge transition groove (113), and the other end of the lever (2) is embedded in the upper lever cavity (111) or the lower lever cavity (112); The connection between the lever (2) and the fork (3) is also provided with a damping structure (4).

2. The child-proof bar lock according to claim 1, characterized in that: A fixed base (5) is also provided inside the housing (1) on the side of the hinge transition groove (113). A drive gear (52) is provided inside the fixed base (5). One side of the drive gear (52) is meshed with the fork (3), and the other side of the drive gear (52) passes through the fixed base (5) and is connected to the lever (2).

3. The child-proof bar lock according to claim 2, characterized in that: The damping structure (4) is located between the fixed base (5) and the connecting side of the lever (2); the damping structure (4) is composed of a ball groove (41), a ball (44), a return spring (43), and a spring hole (42).

4. The child-proof bar lock according to claim 3, characterized in that: The ball groove (41) is composed of two adjacent circular grooves that are opened on the side of the fixed base (5) and are interconnected; the spring hole (42) is provided on the connecting side of the lever (2).

5. The child-proof bar lock according to claim 2, characterized in that: The inner side of the fixed base (5) is also provided with a cavity (50) for the drive gear (52) to be accommodated. The fixed base (5) is also provided with a shaft hole (501) that runs horizontally through the cavity (50) and allows the drive gear (52) to pass through on the other side.

6. The child-proof bar lock according to claim 5, characterized in that: The fork (3) has a rack (31) in the middle, which is embedded in the cavity (50) and meshes with the drive gear (52).

7. The child-proof bar lock according to claim 6, characterized in that: The fork (3) has sliding stroke holes (33) at its upper and lower ends respectively. The housing (1) has screw holes (10) corresponding to the sliding stroke holes (33) and elongated holes (20) for the rack part (31) to pass through.

8. The child-proof bar lock according to claim 6, characterized in that: The fork (3) is also provided with a limiting baffle (32) on the side of the rack (31) to prevent the drive gear (52) from disengaging.

9. The child-proof bar lock according to claim 2, characterized in that: The fixed base (5) is also provided with a protrusion (51) on the side to limit the running trajectory of the lever (2).

10. The child-proof bar lock according to claim 2, characterized in that: The fixed base (5) is also provided with a lock cylinder (6) and a limiting block (61); the housing (1) is provided with a lock hole (62) correspondingly.

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