Door lock facilitating change of latch direction

Abstract

The application discloses a door lock facilitating the reversing of a latch, which comprises a lock shell, a latch hole is formed in the lock shell, a latch is slidably arranged in the hole and rotationally connected with a connecting rod, the connecting rod is inserted into the lock shell, an outer circumferential wall of the connecting rod is provided with a contact protrusion, a latch spring is sleeved on the connecting rod and in contact with the lock shell, a lock groove is formed in a side wall of the latch hole of the lock shell, a step is slidably arranged in the groove to form a first sliding part and a second sliding part, a dismounting opening is arranged on the lock shell and corresponds to the second sliding part, a notch groove is formed at an end of the step, and lengths of the two sliding parts are greater than an exposed length of the latch. An activity shaft assembly is arranged in the latch, which comprises a shaft body and an elastic sheet, the shaft body is movably arranged in a latch activity groove, and the elastic sheet is used for keeping the shaft body in the sliding part; a guide slope is arranged at the notch groove of the step and is used for driving the shaft body to slide along the groove. The application has the advantages of simple structure, convenient reversing operation of the latch, reliable and stable use and good application effect.

Description

Technical Field

[0001] This invention relates to a door lock that facilitates the reversing of the latch. Background Technology

[0002] During door lock installation and use, since doors can open to the left or right, and the installation position needs to be compatible with both sides of the door, the latch reversing function has become one of the core basic functions of door lock products to improve the versatility and adaptability of locks and avoid designing and manufacturing door locks separately for different door opening directions. Currently, existing door locks have various latch reversing structures, but they generally suffer from technical defects such as cumbersome operation and insufficient reliability, making it difficult to meet the needs of efficient on-site installation and long-term stability requirements. Some traditional structures require disassembling the lock panel and flipping the lock body to allow the reversing plate to fall naturally for reversing. This method is not only complicated and time-consuming, but also prone to scratching the lock surface and damaging internal transmission components during disassembly, reducing the lock's assembly precision and service life. Other structures use an external reversing design, where the latch is pushed out or rotated to reversing after being pressed or flicked. Although this type of structure does not require disassembling the lock body, there is a risk of the latch accidentally popping out or getting stuck during reversing. Furthermore, the positioning stability after reversing is poor, and long-term use can easily cause the latch to shift due to vibration and wear, affecting the normal function of the door lock. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a door lock that facilitates the reversing of the latch bolt. It has a simple structure, convenient reversing operation, reliable and stable use, and good performance.

[0004] To achieve the above objectives, the present invention provides a door lock that facilitates latch reversal, comprising a lock housing, a latch hole on the lock housing, a latch slidably disposed in the latch hole, a connecting rod rotatably fitted on the latch, the connecting rod being inserted into the lock housing, an abutting boss on the outer peripheral wall of the connecting rod, a latch spring abutting between the abutting boss and the lock housing, the latch spring being sleeved on the connecting rod, a lock groove on the side wall of the latch hole on the lock housing, a sliding step in the lock groove, the step surface of the sliding step and one side wall of the lock groove forming a first sliding part, the side wall of the sliding step, the bottom surface of the lock groove and the other edge of the lock groove forming a second sliding part. The lock housing has a disassembly port corresponding to the second sliding part for disengaging the latch from the lock housing. The sliding step has a notch groove at the end away from the disassembly port. The lengths of the first and second sliding parts are longer than the length of the latch exposed outside the lock housing. A movable shaft assembly is provided in the latch. The movable shaft assembly includes a shaft body and an elastic piece for holding the end of the shaft body in the first or second sliding part. A movable groove is provided on the side wall of the latch along the height direction. The shaft body is movably disposed in the movable groove. One end of the elastic piece abuts against the end face of the shaft body, and the other end is connected to the latch. The sliding step has a guide slope for driving the shaft body to slide along the movable groove at the notch groove position.

[0005] The beneficial effects of this design are as follows: During normal use, the latch slides within the lock groove. Due to the limited length of the latch exposed outside the lock housing, it only slides along the first sliding section when opening and closing the door, never reaching the notch groove and thus preventing it from entering the second sliding section. This avoids structural malfunctions during normal operation. When a latch reversal is required, it is pressed further in by hand. The movable shaft on the latch slides along the first sliding section into the notch groove and then to the second sliding groove. At this point, the movable shaft also slides within the movable groove and is continuously pressed against the lock groove by the elastic plate. It can then slide to the notch groove position under the action of the latch spring. This allows the latch to slide completely out of the lock case. Rotating the latch 180° completes the reversing action. The movable shaft is pressed into the latch by hand, and then the latch is inserted into the latch hole. For reusability, the lock groove and shaft structure can be centrally symmetrically arranged on the latch. Alternatively, it can be designed for single-use only, with only one guide groove on the other side corresponding to the shaft, lacking a disassembly port for sliding out of the lock case, making it impossible to remove the latch once inserted. By setting a first sliding section longer than the exposed length of the latch, the movable shaft of the latch will not reach the notch position during normal door opening and closing, completely avoiding accidental reversing caused by entering the second sliding section during use, ensuring the stability of the door lock. To reverse the direction, simply press the latch to allow the movable shaft to enter the notch along the first sliding section, then slide it into the second sliding section to remove the latch and reverse the direction. No disassembly of the lock body or panel is required, greatly simplifying the operation and improving on-site installation efficiency. The movable shaft assembly, combined with the elastic plate structure, ensures that the movable shaft always abuts against the sliding part, guaranteeing the positioning accuracy during the sliding of the tongue and preventing shaking or jamming.

[0006] As a further feature of the present invention, one end of the shaft is connected to a movable seat, the movable seat is disposed in the inclined tongue, the elastic plate includes a connecting part and an abutting part for abutting the movable seat so that the shaft abuts against the first sliding part or the second sliding part, the connecting part is inclined and connected to the inner wall of the inclined groove, the movable shaft assembly also includes a push spring for pushing the shaft from the elastic plate abutting part to the connecting part, the push spring abuts between the inclined tongue and the side wall of the movable seat, and the push spring is correspondingly disposed at the position of the elastic plate abutting part.

[0007] The beneficial effects of this design are as follows: This design, through the push-spring structure, makes the shaft position more stable. Furthermore, during the process of inserting the tongue into the tongue hole after reversal, the shaft can more stably enter the position of the first sliding part, improving the smoothness of structural assembly. The push-spring and the elastic plate work together to accurately push the movable shaft to the target sliding part, ensuring smooth shaft movement during sliding and reversal, avoiding jamming or reset failure. Simultaneously, the dual force of the spring and the elastic plate effectively buffers the impact force during shaft sliding, reducing wear between components.

[0008] As a further feature of the present invention, movable shaft assemblies are provided on both sides of the oblique tongue, and the movable shafts on both sides of the oblique tongue are arranged in a centrally symmetrical manner. Lock grooves are provided on the two side walls of the lock housing corresponding to the oblique tongue hole, and the lock grooves on the two side walls of the oblique tongue hole are arranged in a centrally symmetrical manner.

[0009] The advantages of this design are: the dual-sided centrally symmetrical movable shaft assembly and lock groove structure ensure that the latch is subjected to balanced force during sliding, avoiding tilting or jamming caused by force on one side, and improving the smoothness of sliding; the centrally symmetrical design allows the latch to be directly installed into the lock case without adjusting its direction after reversing, without distinguishing between left and right installation positions, further simplifying the reversing operation process.

[0010] As a further feature of the present invention, a limiting wall is provided at one end of the first sliding part near the disassembly port, and the limiting wall is connected to the edge of the disassembly port through an inclined guide surface.

[0011] The advantages of this design are as follows: The limiting wall restricts the inward travel of the latch during normal use, further eliminating the possibility of the movable shaft accidentally entering the notch groove and enhancing the anti-misalignment effect. The inclined guide surface guides the movable shaft to smoothly slide into the notch groove during reversal pressing, reducing operating resistance and improving user feel. The inclined angle design of the guide surface can accommodate pressing operations of different strengths, improving operational tolerance and meeting the needs of different users.

[0012] As a further feature of the present invention, a baffle plate is provided on the outer wall of the lock housing at the position corresponding to the disassembly port, and the baffle plate is connected to the outer wall of the lock housing by screws.

[0013] The advantages of this design are: the baffle can effectively prevent dust and debris from entering the disassembly port and the lock groove, avoiding problems such as jamming or poor sliding of the moving shaft caused by foreign objects; the screw-connected baffle is removable and does not affect the tongue reversing operation, while ensuring the cleanliness of the door lock's appearance; the baffle can also serve as a marker component, making it easy for installers to quickly locate the disassembly port and improving installation efficiency.

[0014] As a further feature of the present invention, a reversing seat is provided in the lock housing, and a tongue outlet is provided in the reversing seat corresponding to the disassembly port. The reversing seat is also provided with a rod outlet for insertion and engagement with a connecting rod. The lock groove is provided on the side wall of the reversing seat, and the oblique tongue is slidably engaged in the reversing seat.

[0015] The advantages of this design are as follows: This configuration integrates the lock groove, tongue outlet, and lever outlet into the reversing seat, enabling a modular design that facilitates individual machining and assembly, reducing overall production complexity. The reversing seat precisely guides the sliding trajectory of the latch, ensuring the installation accuracy of the latches before and after reversing. The modular reversing seat can be replaced individually; when the lock groove wears, it is not necessary to replace the entire lock housing, reducing maintenance costs. The independent design of the reversing seat optimizes the internal space layout of the lock housing, facilitating the integration of other functional components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall assembly of the present invention in a door lock according to an embodiment of the invention;

[0017] Figure 2 This is a schematic diagram of the reversing seat in an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the guarantee structure of the oblique tongue and the reversing seat in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the assembly structure of the oblique tongue and the reversing seat in an embodiment of the present invention;

[0020] Figure 5 This is a schematic cross-sectional view of the oblique tongue in an embodiment of the present invention;

[0021] Figure 6 This is a magnified view of the oblique tongue position in an embodiment of the present invention. Detailed Implementation

[0022] This invention provides an embodiment of a door lock that facilitates the reversing of the latch bolt, such as... Figures 1 to 6As shown, the lock includes a lock housing 1, which has a latch hole. A latch 2 is slidably disposed in the latch hole. A connecting rod 21 is rotatably fitted onto the latch 2. The connecting rod 21 is inserted into the lock housing 1. An abutment boss 22 is provided on the outer peripheral wall of the connecting rod 21. A latch spring 23 abuts against the latch boss 22 and the lock housing. A lock groove 4 is provided on the side wall of the latch hole in the lock housing 1. A sliding step is provided in the lock groove 4. The step surface of the sliding step and one side wall of the lock groove 4 combine to form a first sliding part 41. The side wall of the sliding step, the bottom surface of the lock groove 4, and the other edge of the lock groove 4 combine to form a second sliding part 42. The lock housing 1 has a corresponding position for the second sliding part 42 for the latch 2. The sliding step is detached from the disassembly port 11. A notch 43 is provided at one end of the sliding step away from the disassembly port 11. The lengths of the first sliding part 41 and the second sliding part 42 are longer than the length of the latch 2 exposed outside the lock case 1. A movable shaft assembly is provided in the latch 2. The movable shaft assembly includes a shaft body 5 and an elastic piece 52 for holding the end of the shaft body 5 in the first sliding part 41 or the second sliding part 42. A movable groove is provided on the side wall of the latch 2 along the height direction. The shaft body 5 is movably disposed in the movable groove. One end of the elastic piece 52 abuts against the end face of the shaft body 5, and the other end is connected to the latch 2. A guide slope for driving the shaft body 5 to slide along the movable groove is provided at the position of the sliding step corresponding to the notch 43. The beneficial effects of this design are as follows: During normal use, the latch 2 slides in the lock groove 4. Because the length of the latch 2 exposed outside the lock housing 1 is limited, it only slides on the first sliding part 41 when opening and closing the door, and does not reach the notch 43, thus preventing it from entering the second sliding part 42. This avoids structural accidents during normal operation. When a reversing action of the latch 2 is required, it is further pressed in by hand. The movable shaft 5 on the latch 2 enters the notch 43 along the first sliding part 41 and then reaches the second sliding groove. At this time, the movable shaft 5 also slides in the movable groove and is continuously pressed against the lock groove 4 by the elastic plate 52. It can also slide to the notch 43 under the action of the latch 2 spring. Finally, the latch can slide out of the lock case 1 completely. The latch is rotated 180° to complete the reversing action. The movable shaft 5 is pressed into the latch 2 by hand, and then the latch 2 is inserted into the latch 2 hole. For reuse, the lock groove 4 and the shaft 5 structure can be centrally symmetrically set on the latch 2. Alternatively, it can be set for single use only. The other side is only set with a guide groove position corresponding to the shaft 5, without a disassembly port 11 for sliding out of the lock case 1, so that the latch 2 cannot be pulled out after insertion. By setting a first sliding part 41 with a length longer than the exposed length of the latch 2, the movable shaft of the latch 2 will not reach the notch 43 position when the door is opened and closed normally, completely avoiding the problem of accidental reversing caused by entering the second sliding part 42 during use, and ensuring the stability of the door lock.When reversing, simply press the latch 2 to allow the movable shaft to enter the notch 43 along the first sliding part 41, and then slide it into the second sliding part 42 to remove the latch 2 for reversing. No disassembly of the lock body or panel is required, greatly simplifying the operation and improving on-site installation efficiency. The movable shaft assembly, combined with the elastic plate 52 structure, ensures that the movable shaft always abuts against the sliding part, guaranteeing the positioning accuracy of the latch 2 during sliding and preventing shaking or jamming.

[0023] As a further feature of this embodiment, one end of the shaft 5 is connected to a movable seat 51, which is disposed in the inclined tongue 2. The elastic plate 52 includes a connecting part 521 and an abutting part 522 for abutting the movable seat 51 so that the shaft 5 abuts against the first sliding part 41 or the second sliding part 42. The connecting part 521 is inclined and connected to the inner wall of the inclined groove. The movable shaft assembly also includes a push spring 53 for pushing the shaft 5 from the abutting part 522 of the elastic plate 52 to the connecting part 521. The push spring 53 abuts between the inclined tongue 2 and the side wall of the movable seat 51. The push spring 53 is correspondingly disposed at the position of the abutting part 522 of the elastic plate 52. The beneficial effects of this design are as follows: With the push spring 53 structure, the position of the shaft 5 is more stable. Furthermore, during the process of inserting the tongue 2 into the tongue 2 hole after the reversal is completed, the shaft 5 can enter the position of the first sliding part 41 more stably, improving the smoothness of the structural assembly. The push spring 53 and the contact part 522 of the elastic plate 52 work together to accurately push the movable shaft to the target sliding part, ensuring that the shaft 5 moves smoothly during sliding and reversal, avoiding jamming or reset failure. At the same time, the dual force of the spring and the elastic plate 52 can effectively buffer the impact force when the shaft 5 slides, reducing wear between components.

[0024] As a further feature of this embodiment, movable shaft assemblies are provided on both sides of the latch 2, and the movable shafts on both sides of the latch 2 are arranged symmetrically at the center. Lock grooves 4 are respectively provided on the two side walls of the lock housing 1 corresponding to the hole of the latch 2, and the lock grooves 4 on the two side walls of the hole of the latch 2 are arranged symmetrically at the center. The beneficial effects of this configuration are: with this configuration, the movable shaft assemblies and lock groove 4 structure on both sides are symmetrically arranged, so that the latch 2 is subjected to balanced force during sliding, avoiding tilting or jamming caused by force on one side, and improving the smoothness of sliding; the symmetrical design allows the latch 2 to be directly installed into the lock housing 1 without adjusting its direction after reversing, without distinguishing between left and right installation positions, further simplifying the reversing operation process.

[0025] As a further feature of this embodiment, a limiting wall 44 is provided at one end of the first sliding part 41 near the disassembly port 11. The limiting wall 44 is connected to the edge of the disassembly port 11 via an inclined guide surface. The advantages of this design are: the limiting wall 44 restricts the inward travel of the tongue 2 during normal use, further eliminating the possibility of the movable shaft accidentally entering the notch 43, and enhancing the anti-misalignment effect. The inclined guide surface guides the movable shaft to smoothly slide into the notch 43 during reversal pressing, reducing operating resistance and improving the user's operating feel. The inclined angle design of the guide surface can adapt to different pressing forces, improving operational tolerance and meeting the needs of different users.

[0026] As a further feature of this embodiment, a baffle plate 12 is provided on the outer wall of the lock housing 1 at the position corresponding to the disassembly port 11. The baffle plate 12 is connected to the outer wall of the lock housing 1 by screws. The advantages of this configuration are: the baffle plate 12 can effectively prevent dust and debris from entering the disassembly port 11 and the interior of the lock groove 4, avoiding problems such as jamming or poor sliding of the moving shaft caused by foreign objects; the screw-connected baffle plate 12 is detachable and does not affect the reversing operation of the latch 2, while ensuring the cleanliness of the door lock's appearance; the baffle plate 12 can also serve as a marker component, making it easy for installers to quickly locate the position of the disassembly port 11, thus improving installation efficiency.

[0027] As a further feature of this embodiment, a reversing seat 3 is provided in the lock housing 1. The reversing seat 3 has a tongue outlet corresponding to the disassembly port 11, and a rod outlet for insertion and engagement with the connecting rod 21. The lock groove 4 is provided on the side wall of the reversing seat 3, and the latch slidably engages in the reversing seat 3. The advantages of this configuration are: the reversing seat 3 integrates the lock groove 4, the tongue outlet, and the rod outlet, achieving a modular design that facilitates individual processing and assembly, reducing overall production difficulty. The reversing seat 3 can precisely guide the sliding trajectory of the latch 2, ensuring the installation accuracy of the latch 2 before and after reversing. The modular reversing seat 3 can be replaced individually; when the lock groove 4 wears, it is not necessary to replace the entire lock housing 1, reducing maintenance costs. The independent design of the reversing seat 3 optimizes the internal spatial layout of the lock housing 1, facilitating the integration of other functional components.

[0028] The above examples are merely one preferred embodiment of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included within the protection scope of the present invention.

Claims

1. A door lock facilitating latch reversal, comprising a lock housing, a latch hole provided on the lock housing, a latch slidably disposed in the latch hole, a connecting rod rotatably engaged on the latch, the connecting rod being inserted into the lock housing, an abutting boss provided on the outer peripheral wall of the connecting rod, a latch spring abutting between the abutting boss and the lock housing, the latch spring being sleeved on the connecting rod, characterized in that: The lock housing has a lock groove on the side wall of the latch hole. A sliding step is provided in the lock groove. The step surface of the sliding step and one side wall of the lock groove combine to form a first sliding part. The side wall of the sliding step, the bottom surface of the lock groove, and the other edge of the lock groove combine to form a second sliding part. The lock housing has a disassembly port corresponding to the second sliding part for disengaging the latch from the lock housing. A notch is provided at the end of the sliding step away from the disassembly port. The lengths of the first and second sliding parts are longer than the length of the latch exposed outside the lock housing. A movable shaft assembly is provided in the latch. The movable shaft assembly includes a shaft body and an elastic piece for holding the end of the shaft body in the first or second sliding part. A movable groove is provided along the height direction on the side wall of the latch. The shaft body is movably disposed in the movable groove. One end of the elastic piece abuts against the end face of the shaft body, and the other end is connected to… In the oblique tongue, the sliding step is provided with a guide slope at the notch position for driving the shaft to slide along the movable groove. One end of the shaft is connected to a movable seat, which is disposed in the oblique tongue. The elastic plate includes a connecting part and a contact part for abutting the movable seat so that the shaft abuts against the first sliding part or the second sliding part. The connecting part is obliquely disposed and connected to the inner wall of the oblique groove. The movable shaft assembly also includes a push spring for pushing the shaft from the elastic plate contact part to the connecting part. The push spring abuts between the oblique tongue and the side wall of the movable seat. The push spring is disposed at the position corresponding to the elastic plate contact part. A reversing seat is disposed in the lock housing. The reversing seat is provided with a tongue outlet corresponding to the disassembly port. The reversing seat is also provided with a rod outlet for inserting and engaging with the connecting rod. The lock groove is disposed on the side wall of the reversing seat. The oblique tongue is slidably engaged in the reversing seat.

2. The door lock for easy tongue reversal according to claim 1, characterized in that: Both sides of the latch are provided with movable shaft assemblies, and the movable shafts on both sides of the latch are arranged symmetrically at the center. The lock housing is provided with lock grooves on both sides of the latch hole, and the lock grooves on both sides of the latch hole are arranged symmetrically at the center.

3. The door lock for easy tongue reversal according to claim 1, characterized in that: A limiting wall is provided at one end of the first sliding part near the disassembly port, and the limiting wall is connected to the edge of the disassembly port through an inclined guide surface.

4. The door lock for easy tongue reversal according to claim 1, characterized in that: A baffle plate is provided on the outer wall of the lock case at the position corresponding to the disassembly port, and the baffle plate is connected to the outer wall of the lock case by screws.

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