Door lock with more compact handle structure

Abstract

The application relates to a door lock with a more compact handle structure and belongs to the technical field of locks. The door lock comprises a shell, a dial block assembly, a square lock bolt assembly, an inclined lock bolt assembly and a dial piece. The square lock bolt assembly and the inclined lock bolt assembly are arranged at intervals along the length direction of the shell. The dial piece is slidably installed along the length direction of the shell. The dial block assembly comprises a dial block, a reset torsion spring, a pressing piece, a limiting protrusion and a dial column. The dial block is rotationally installed in the shell and is provided with a square hole matched with a door handle. The dial block rotates to drive the dial piece to slide and has a certain ineffective angle. The pressing piece and the reset torsion spring are sleeved on the dial block. The dial block is provided with the dial column. The end portions of the reset torsion spring are reset ends. The dial column is located between the two reset ends. The dial block drives the pressing piece to rotate to extrude the inclined lock bolt of the inclined lock bolt assembly to retract. The limiting protrusion is fixedly installed in the shell and located between the two reset ends. The application has the effects of fewer components, fewer assembly procedures and lower cost.

Description

Technical Field

[0001] This application relates to the field of locks, and in particular to a door lock with a more compact handle structure. Background Technology

[0002] As the name suggests, a door lock is a device used to lock a door to prevent others from opening it. They are generally divided into interior door locks and entrance door locks.

[0003] For interior door locks, such as those for bedrooms, bathrooms, children's rooms, or elderly people's rooms, since the main entrance door lock already has strong security features, the design of interior door locks primarily considers the need for privacy protection. Consequently, interior door locks eliminate the need for a key to unlock from the outside; that is, the door can be opened directly from either the inside or outside handle. Like the main entrance door lock, interior door locks generally have two sets of latches: one using a beveled latch to operate the door handle, and the other using a square latch to operate the lock cylinder. The square latch, in conjunction with the lock cylinder... The lock mechanism can lock the door to prevent the door handle from opening. Common door locks have a lever inside the door handle to drive the latch. The lever rotates with the door handle. Since the door handle needs to return to the center position after being pressed, a torsion spring is usually installed inside the lock. The torsion spring is connected to a reset block. The torsion spring restricts the reset block to the corresponding position inside the lock. When the lever rotates, it will move the reset block in a straight line. When the door handle is no longer pressed, the torsion spring will move the reset block back to its original position, and then move the lever back to the door handle to its original position.

[0004] The torsion spring and reset block of the aforementioned door lock both require a certain amount of space inside the door lock. At the same time, the production and installation of the reset block require more costs and more installation procedures. Utility Model Content

[0005] To reduce costs and assembly steps, it is best to eliminate the reset block component. This application provides a door lock with a more compact handle structure.

[0006] The door lock with a more compact handle structure provided in this application adopts the following technical solution: A door lock with a more compact handle structure includes a housing, a toggle assembly, a square latch assembly, a bevel latch assembly, and a paddle connecting the toggle assembly and the square latch assembly, all installed within the housing. The square latch assembly and the bevel latch assembly are spaced apart along the length of the housing. The paddle is slidably installed along the length of the housing. The toggle assembly includes a toggle block, a return torsion spring, a pressing plate, a limiting protrusion, and a paddle post. The toggle block is rotatably installed within the housing and has a square hole that mates with the door handle. The toggle block rotates, causing the paddle post to slide with a certain ineffective angle. The pressing plate and the return torsion spring are fitted onto the toggle block. The paddle block is provided with the paddle post. The ends of the return torsion spring are designated as return ends. The paddle post is located between the two return ends. The toggle block drives the pressing plate to rotate via the paddle post, causing the bevel latch of the bevel latch assembly to retract. The limiting protrusion is fixedly installed inside the housing and located between the two return ends.

[0007] By adopting the above technical solution, the reset torsion spring is integrated into the lever block. The two reset ends of the reset torsion spring are then restricted by the limiting protrusion inside the housing, preventing the reset torsion spring from rotating. The lever pin on the lever block then presses against the pressing plate, causing the pressing plate to rotate. The pressing plate then drives the angled latch assembly, achieving the retraction function of the angled latch. During this process, the lever pin also presses against the reset end of the reset torsion spring. When the door handle no longer drives the lever block to rotate, the lever pin, under the action of the reset torsion spring, can reset the lever block, realizing the reset function of the door handle on the door lock. Since the reset torsion spring is mounted on the lever block, installation is more convenient and can be installed together with the lever block, reducing assembly steps. The reset torsion spring directly drives the reset of the lever block, resulting in fewer parts and reduced production costs.

[0008] Optionally, the lever includes a column and a plate. The two ends of the column are cylindrical and are rotatably mounted on the housing. The middle section of the column is located inside the housing for mounting the reset torsion spring, the pressing plate, and the plate. The plate is fitted onto the column and rotates with the column. The reset torsion spring is clamped between the plate and the pressing plate. The lever is integrally protruding from the plate toward the pressing plate.

[0009] By adopting the above technical solution, the push block is composed of two independent parts: a column and a plate, which reduces the difficulty of production. Both the column and the plate can be replaced separately when damaged. At the same time, since the plate is also mounted on the column, it is convenient to remove and install the plate, and it is also convenient to install the reset torsion spring. The column can be installed first, and then the reset torsion spring and the plate can be mounted in sequence, making the assembly process simpler and eliminating complicated assembly requirements.

[0010] Optionally, the pressing pad is integrally provided with a stroke column protruding in the direction of the pad body.

[0011] By adopting the above technical solution, a stroke column is set on the pressing tablet, which on the one hand facilitates the assembly of the pressing tablet, especially the gripping in the automated assembly process, and on the other hand, limits the stroke limit of the tablet body.

[0012] Optionally, the paddle has a connecting notch on its side, and the paddle has a connecting post protruding integrally, the connecting post being located within the connecting notch and being movable within the connecting notch.

[0013] By adopting the above technical solution, the interaction between the associated column and the associated notch enables the rotating block to drive the sliding plate to have a certain ineffective angle. Compared with the existing door locks, where the column and plate of the block are designed to achieve the ineffective angle, and the plate and the sliding plate are linked in real time, the block structure is simpler, thus providing sufficient installation space for the installation of the reset torsion spring, simplifying the overall structure and reducing the difficulty of production and assembly.

[0014] Optionally, the lever further includes a limiting piece, which is fitted onto the column and located on the side of the piece facing away from the pressing piece.

[0015] By adopting the above technical solution and setting the limiting plate, on the one hand, the movement space on the column is filled, so that the fluctuation of the plate on the column inside the housing is limited, and the function of the plate driving the pressing plate and the paddle is stable. On the other hand, the friction between the plate and the inner wall of the housing is reduced, and the replacement of the limiting plate after wear is more convenient.

[0016] Optionally, the limiting protrusion is fixed to the housing.

[0017] By adopting the above technical solution, the limiting protrusion is installed in an insert manner, making it easier to produce as an independent component. Furthermore, the limiting protrusion can be removed for replacement and maintenance in the future.

[0018] Optionally, a tension spring is installed between the paddle and the inner wall of the housing.

[0019] By adopting the above technical solution, the spring allows the paddle to have a normal position, and the paddle can return to its original position when it is not driven by other components.

[0020] Optionally, the paddle has a mounting hole, a tension spring cover is installed in the mounting hole, the tension spring cover has a protruding tension spring post that is inserted into the mounting hole, and one end of the tension spring is fitted onto the tension spring post.

[0021] By adopting the above technical solution, the tension spring is secured to the lever by the tension spring cover, which is inserted into the lever through the tension spring post, making the installation of the tension spring convenient.

[0022] In summary, by incorporating the return torsion spring onto the lever, and then restricting the two return ends of the return torsion spring through the limiting protrusion inside the housing, the return torsion spring is prevented from rotating. The lever on the lever then presses against the pressing plate, causing the pressing plate to rotate. The pressing plate then drives the angled latch assembly, achieving the retraction function of the angled latch. During this process, the lever also presses against the return end of the return torsion spring. When the door handle no longer drives the lever to rotate, the lever, under the action of the return torsion spring, can return the lever to its original position, thus achieving the door handle's return function on the door lock. Since the return torsion spring is mounted on the lever, installation is more convenient and can be done together with the lever, reducing assembly steps. The return torsion spring directly drives the return of the lever, resulting in fewer parts and reduced production costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the door lock structure in an embodiment of this application; Figure 2 This is a schematic diagram of the internal components of the door lock in an embodiment of this application; Figure 3 This is a schematic diagram of the installation structure of the toggle assembly and the angled locking tongue assembly in the embodiments of this application; Figure 4 This is a top view of the mounting structure of the oblique locking tongue assembly in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the toggle assembly in the embodiments of this application; Figure 6 This is a schematic diagram of the mounting structure of the column, pressing piece, and reset torsion spring in the embodiments of this application; Figure 7 This is a partial structural schematic diagram of the paddle in the embodiments of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Outer shell; 11. Lock cylinder mounting hole; 12. Shell plate; 13. Side plate; 131. Angled latch hole; 14. Sliding limiting plate; 141. Loose protrusion; 15. Loose hole; 16. Sliding space; 17. Guide plate; 171. Oblong hole; 2. Toggle assembly; 21. Toggle block; 211. Column; 212. Plate; 213. Square hole; 214. Mounting part; 215. Connecting notch; 22. Return torsion spring ; 221, Reset end; 23, Pressing piece; 231, Pressing part; 232, Stroke post; 24, Limiting piece; 25, Limiting protrusion; 26, Toggle post; 3, Square latch assembly; 4, Angled latch assembly; 41, Angled latch; 411, Angled latch post; 412, Spring baffle; 42, Latch spring; 43, Blocking plate; 5, Toggle piece; 51, Connecting post; 52, Mounting hole; 6, Tension spring; 7, Tension spring cover; 71, Tension spring post. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-7This application will be described in further detail.

[0026] This application discloses a door lock with a more compact handle structure.

[0027] Reference Figure 1 and Figure 2 A door lock with a more compact handle structure includes a housing 1, a lever assembly 2, a square bolt assembly 3, a bevel bolt assembly 4, and a lever 5 associated with the lever assembly 2 and the square bolt assembly 3, all installed within the housing 1. The lever assembly 2 cooperates with the door handle, and the door handle drives the bevel bolt 41 of the bevel bolt assembly 4 to extend and retract into and out of the housing 1 via the lever assembly 2. The housing 1 also has a lock cylinder mounting hole 11 for the lock cylinder to pass through. The square bolt assembly 3 is positioned close to the lock cylinder mounting hole 11 within the housing 1, allowing the lock cylinder to operate the square bolt assembly 3. The cooperation structure between the lever 5 and the square bolt assembly 3, the cooperation structure between the lock cylinder and the square bolt assembly 3, and the structure of the square bolt assembly 3 are all existing conventional technologies and will not be described in detail here.

[0028] Reference Figure 2 and Figure 3 The outer shell 1 is elongated and hollow inside. The outer shell 1 includes two upper and lower shell plates 12 and a side plate 13. The two shell plates 12 are assembled and fixed with screws to form a shell with an opening on one side. The side plate 13 is installed at the opening formed by the two shell plates 12, and the two ends of the side plate 13 extend beyond the two ends of the shell plate 12 in the length direction. The connection between the side plate 13 and the shell plate 12 is as follows: sliding limiting plates 14 are installed at both ends of the opening side of the two shell plates 12 in the length direction. One end of the sliding limiting plate 14 is located between the two shell plates 12, and a locking protrusion 141 is provided on the upper and lower sides of the sliding limiting plate 14. The two shell plates 12 have locking holes 15 for the locking protrusion 141 to be inserted, so that the sliding limiting plate 14 is clamped and fixed between the two shell plates 12. The two sliding limiting plates 14 are fixed to the side plate 13 with screws, and finally the indirect fixation between the side plate 13 and the shell plate 12 is achieved.

[0029] Meanwhile, the sliding limiting plate 14 has a C-shaped cross-section and abuts against the side plate 13 at the top and bottom. A sliding space 16 is formed between the sliding limiting plate 14 and the side plate 13 at a certain distance. A guide plate 17 is slidably installed in the sliding space 16. The guide plate 17 has an oblong hole 171 in the extension direction, so that the screws that fix the side plate 13 and the sliding limiting plate 14 are located in the oblong hole 171 and do not hinder the sliding of the guide plate 17. The two ends of the lever 5 in the length direction are respectively inserted into the two guide plates 17 to limit the sliding path of the lever 5. In this embodiment, the specific insertion and engagement method between the lever 5 and the guide plate 17 is to make a hole in the lever 5 for the protrusion on the guide plate 17 to be inserted.

[0030] Reference Figure 2 and Figure 4Inside the outer casing 1, along the length direction, are arranged a slanted latch assembly 4, a lever assembly 2, a square latch assembly 3, and a lock cylinder mounting hole 11. When the door lock is installed on the door, the slanted latch assembly 4 and the square latch assembly 3 are arranged vertically at intervals. The slanted latch assembly 4 includes a slanted latch 41, a latch spring 42, and a blocking plate 43. The side plate 13 has a slanted latch hole 131 for the slanted latch 41 to extend and retract into and out of the outer casing 1. One end of the slanted latch 41 located inside the outer casing 1 has a protruding slanted latch post 411. The latch spring 42 is fitted onto the slanted latch. A spring baffle 412 is provided on the locking tongue post 411. The locking tongue spring 42 is clamped between the spring baffle 412 and the inner wall of the outer shell 1. The locking tongue spring 42 pushes the oblique locking tongue 41 out of the outer shell 1. The blocking plate 43 is inserted and fixed between the two shell plates 12. The blocking plate 43 is located on the side of the oblique locking tongue post 411 away from the toggle block assembly 2 and on the side of the spring baffle 412 away from the locking tongue spring 42. The oblique locking tongue 41 is restricted from fully extending out of the outer shell 1 by the blocking plate 43 abutting against the spring baffle 412.

[0031] Reference Figure 4 , Figure 5 and Figure 6 The toggle assembly 2 includes a toggle block 21, a reset torsion spring 22, a pressing plate 23, a limiting plate 24, a limiting protrusion 25, and a toggle post 26. The toggle block 21 includes a column 211 and a plate 212. The two ends of the column 211 are cylindrical. The two shell plates 12 of the outer shell 1 have circular holes for the two ends of the column 211 to be inserted, so that the column 211 can rotate. The column 211 has a square hole 213 coaxially provided to cooperate with the door handle, so that when the door handle is installed on the column 211, the column 211 can be rotated by operating the door handle. The middle part of the column 211 is a square column, and the part between the middle part and the two ends of the column 211 is set as the mounting part 214. The four sides of the mounting part 214 are located on the same plane as the middle part of the column 211. A portion of the four corners of the mounting part 214 is cut off to form a cylindrical surface, and the diameter of the cylindrical surface of the mounting part 214 is larger than the diameter of the end of the column 211, so that the column 211 is restricted between the two shell plates 12.

[0032] The column 211 is equipped with a pressing piece 23, a return torsion spring 22, a plate 212, and a limiting piece 24. The pressing piece 23 is installed separately in one mounting part 214, while the plate 212 and the limiting piece 24 are installed in another mounting part 214. The limiting piece 24 is located on the side of the plate 212 away from the pressing piece 23. The return torsion spring 22 is clamped between the plate 212 and the pressing piece 23. Meanwhile, the paddle 5 and the pressing piece 23 are positioned above and below each other. That is, the paddle 5 is located above the plate 212 next to the limiting piece 24. The limiting piece 24 is open on the side near the paddle 5 and has a portion removed so as not to interfere with the paddle 5.

[0033] The plate body 212 extends outward toward the lever 5, and the lever 26 protrudes from the extended portion of the plate body 212 toward the pressing plate 23. The ends of the reset torsion spring 22 extend outward and are set as reset ends 221. The lever 26 is located between the two reset ends 221. At the same time, the lever 26 extends downward to the height of the pressing plate 23. The pressing plate 23 extends a pressing part 231 in an arc below the lever 5 and abuts against the spring baffle 412 of the oblique locking tongue 41. When the lever body 211 rotates, the lever 26 can drive the pressing plate 23 to rotate. Furthermore, the pressing plate 23 can push the spring baffle 412, thereby driving the oblique locking tongue 41 to retract into the outer shell 1. At the same time, the pressing plate 23 has a stroke post 232 protruding from the pressing part 231 toward the plate body 212.

[0034] The limiting protrusion 25 is inserted and fixed on the shell plate 12 near the pressing piece 23, and the limiting protrusion 25 is located between the two reset ends 221. In this embodiment, the limiting protrusion 25 is located between the toggle post 26 and the side plate 13. The limiting protrusion 25 restricts the two reset ends 221. When the toggle post 26 rotates, it needs to overcome the elastic force of the two reset ends 221 of the reset torsion spring 22 moving away from each other.

[0035] Reference Figure 2 , Figure 3 and Figure 7 The aforementioned plate 212 extends into the area between the lever 5 and the side plate 13 and has an associated notch 215. The lever 5 has an integrally protruding associated post 51. The associated post 51 is located within the associated notch 215 and can move within the associated notch 215. The length of the associated notch 215 is greater than the diameter of the associated post 51, so that the plate 212 needs to rotate a certain angle to drive the lever 5, thereby realizing the function of rotating the lever 21 to drive the lever 5 to slide and having a certain ineffective angle.

[0036] A tension spring 6 is installed between the paddle 5 and the inner wall of the outer casing 1. In this embodiment, the tension spring 6 has round holes bent at both ends and in the middle. One end of the tension spring 6 is fitted onto the square locking tongue assembly 3 for fixation, and the other end is fixed to the middle area of ​​the paddle 5 through the tension spring cover 7. Specifically, the paddle 5 has an installation hole 52. The tension spring cover 7 has a protruding tension spring post 71 that is inserted into the installation hole 52. The tension spring post 71 consists of two stepped posts with different diameters. The tension spring 6 is fitted onto the larger diameter part of the tension spring post 71 near the tension spring cover 7, while the end of the tension spring post 71 away from the tension spring cover 7 is inserted or screwed into the installation hole 52. Finally, the tension spring 6 is fixed to the paddle 5 through the tension spring cover 7.

[0037] The implementation principle of a door lock with a more compact handle structure in this application embodiment is as follows: by designing the reciprocating delayed driving structure of the lever 21 that drives the lever 5 as a reciprocating delayed driving structure between the lever 21 and the lever 5, the structure of the lever 21 is simplified, thereby freeing up enough space on the lever 21 for the installation of the reset torsion spring 22. In this process, the reset structure of the lever 21 and the structure of the lever 21 itself are simplified, ultimately reducing the number of parts and lowering production costs.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A door lock with a more compact handle structure, characterized in that: The device includes a housing (1), a toggle assembly (2), a square latch assembly (3), a slanted latch assembly (4), and a paddle (5) associated with the toggle assembly (2) and the square latch assembly (3). The square latch assembly (3) and the slanted latch assembly (4) are spaced apart along the length of the housing (1). The paddle (5) is slidably installed along the length of the housing (1). The toggle assembly (2) includes a toggle block (21), a reset torsion spring (22), a pressing piece (23), a limiting protrusion (25), and a toggle post (26). The toggle block (21) is rotatably installed inside the housing (1) and has a square hole (213) that mates with a door handle. (21) Rotation causes the paddle (5) to slide and have a certain ineffective angle. The pressing piece (23) and the reset torsion spring (22) are fitted onto the paddle block (21). The paddle block (21) is provided with the paddle post (26). The ends of the reset torsion spring (22) are set as reset ends (221). The paddle post (26) is located between the two reset ends (221). The paddle block (21) drives the pressing piece (23) to rotate through the paddle post (26) and squeezes the oblique locking tongue (41) of the oblique locking tongue assembly (4) to retract. The limiting protrusion (25) is installed and fixed inside the outer shell (1) and located between the two reset ends (221).

2. A door lock with a more compact handle structure according to claim 1, characterized in that: The lever (21) includes a column (211) and a plate (212). The two ends of the column (211) are cylindrical and are rotatably mounted on the outer shell (1). The middle section of the column (211) is located inside the outer shell (1) for mounting the reset torsion spring (22), the pressing plate (23) and the plate (212). The plate (212) is fitted onto the column (211) and rotates with the column (211). The reset torsion spring (22) is clamped between the plate (212) and the pressing plate (23). The lever (26) is integrally protruded from the plate (212) toward the pressing plate (23).

3. A door lock with a more compact handle structure according to claim 2, characterized in that: The pressing plate (23) has a stroke column (232) integrally protruding in the direction of the plate body (212).

4. A door lock with a more compact handle structure according to claim 1, characterized in that: The paddle (26) has a connecting notch (215) on its side, and the paddle (5) has a connecting post (51) protruding from it. The connecting post (51) is located in the connecting notch (215) and can move within the connecting notch (215).

5. A door lock with a more compact handle structure according to claim 2, characterized in that: The lever (21) also includes a limiting piece (24), which is fitted onto the column (211) and is located on the side of the plate (212) away from the pressing piece (23).

6. A door lock with a more compact handle structure according to claim 1, characterized in that: The limiting protrusion (25) is inserted and fixed to the outer shell (1).

7. A door lock with a more compact handle structure according to claim 1, characterized in that: A tension spring (6) is installed between the paddle (5) and the inner wall of the outer casing (1).

8. A door lock with a more compact handle structure according to claim 7, characterized in that: The paddle (5) has a mounting hole (52), and a tension spring cover (7) is installed in the mounting hole (52). The tension spring cover (7) has a protruding tension spring post (71) that is inserted into the mounting hole (52), and one end of the tension spring (6) is fitted onto the tension spring post (71).

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