A multi-point lock with simple structure

Abstract

This invention discloses a simple multi-point lock, belonging to the field of multi-point lock technology. The key technical features are: a lock housing, a straight latch, a bevel latch, a rotating component, a transmission component, and two deadbolts. The straight latch and bevel latch are slidably disposed within the lock housing. The transmission component is slidably disposed within the lock housing, with both ends connected to corresponding deadbolts. The rotating component is rotatably disposed within the lock housing and connected to a handle. Rotation of the rotating component causes the bevel latch to slide back into the lock housing. A limiting component is slidably disposed within the lock housing to prevent the bevel latch from completely disengaging from the lock housing. An elastic component is also provided within the lock housing to allow the bevel latch to slide out of the lock housing and to reset the limiting component. Rotation of the rotating component drives the transmission component to slide, thereby causing the transmission component to extend the straight latch out of the lock housing or retract it into the lock housing. A locking plate is rotatably disposed within the lock housing to lock the extended position of the straight latch. A lever is also rotatably disposed within the lock housing to lock the locking plate and restrict its rotation. The overall structure of this multi-point lock is simple.

Description

Technical Field

[0001] This invention belongs to the field of multi-point lock technology, and specifically relates to a multi-point lock with a simple structure. Background Technology

[0002] Currently, multi-point locks are widely used in the door and window hardware industry. Chinese patent CN223753848U discloses a multi-point lock body, including a locking assembly and a driving assembly. The driving assembly includes a driving block, a first washer of the driving block, and a third driving bar. The locking assembly includes a second latch and a driving spring. The second latch is connected to a spring pressing block through a thrust spring. The spring pressing block is fixed in the lock body. The first washer of the driving block is fixedly connected to the driving block and has a toggle end for actuating the second latch to compress the thrust spring and drive the second latch to retract. The driving spring is set in the driving spring mounting groove of the lock body and is limited by the driving spring mounting groove. The third driving bar includes a first bow and a second bow. The first bow covers the driving spring, and the second bow accommodates and pushes the driving block. The driving spring drives the third driving bar to return the rotated driving block to the center.

[0003] The above technical solution has the following drawbacks: the multi-point lock body structure is too complex and has a large number of parts, which not only increases the cost of molds and materials, but also leads to cumbersome assembly processes and low production efficiency. At the same time, the complex transmission mechanism is prone to failure due to wear, jamming or mismatch during operation, which affects the service life and security of the lock body. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a multi-point lock with a simple structure. The technical problem to be solved by this invention is: how to simplify the structure and reduce the number of components.

[0005] The above-mentioned technical objective of the present invention can be achieved through the following technical solution: a multi-point lock with a simple structure, including a lock shell, a straight latch, a bevel latch, a rotating component, a transmission component, and two deadbolts. The straight latch and the bevel latch are slidably disposed in the lock shell. The transmission component is slidably disposed within the lock shell, and its two ends are respectively connected to the corresponding deadbolts. The rotating component is rotatably disposed within the lock shell and connected to an external handle. The rotation of the rotating component can cause the bevel latch to slide back into the lock shell. A limiting component is slidably disposed within the lock shell to prevent the bevel latch from completely disengaging from the lock shell. An elastic component is disposed within the lock shell to allow the bevel latch to slide out of the lock shell and to reset the limiting component. The rotation of the rotating component can drive the transmission component to slide, thereby causing the transmission component to drive the straight latch to extend out of the lock shell or retract into the lock shell. A locking piece for locking the extended position of the straight latch is rotatably disposed within the lock shell. A knob is rotatably disposed within the lock shell to lock the locking piece to restrict its rotation.

[0006] In the aforementioned simple multi-point lock, a pull plate is provided on the straight tongue, and a strip hole is provided on the pull plate. A limit shaft is provided inside the lock housing, and the limit shaft passes through the strip hole.

[0007] In the above-mentioned simple multi-point lock, the locking plate is rotatably mounted on the limiting shaft, the locking plate has a locking groove, the toggle switch can rotate to enter or disengage from the locking groove, and a reset torsion spring is provided inside the lock housing for rotating and resetting the locking plate.

[0008] In the aforementioned simple multi-point lock, the locking plate has a supporting protrusion that abuts against the end of the pull plate away from the straight tongue.

[0009] In the aforementioned simple multi-point lock, the transmission component has a linkage groove, and the rotating component has a linkage protrusion. The sidewall of the linkage protrusion abuts against the sidewall of the linkage groove. When the rotating component rotates, the linkage protrusion can push the transmission component to slide.

[0010] In the aforementioned simple multi-point lock, the pull plate is provided with a guide protrusion, and the transmission component is provided with a guide hole. The guide protrusion passes through the guide hole and the two are movably engaged.

[0011] In the aforementioned simple multi-point lock, the guide hole includes an inclined section, a first horizontal positioning section, and a second horizontal positioning section. The first horizontal positioning section and the second horizontal positioning section are located at both ends of the inclined section. When the guide protrusion is located in the first horizontal positioning section, the straight tongue extends to the outside of the lock housing. When the guide protrusion is located in the second horizontal positioning section, the straight tongue retracts into the lock housing.

[0012] In the aforementioned simple multi-point lock, an auxiliary torsion spring is provided inside the lock housing. One end of the auxiliary torsion spring is connected to the lock housing, and the other end of the auxiliary torsion spring is connected to the transmission component.

[0013] In the aforementioned simple multi-point lock, a rod is connected to the latch and the two are rotatably engaged. A base plate is provided on the rod. A limiting hole is provided on the lock housing. The end of the base plate extends into the limiting hole and the two are slidably engaged. A limiting member can be pressed onto the base plate. The limiting member can disengage from the base plate. The limiting member has a limiting block. A limiting hole is provided on the lock housing, and the limiting block extends into the limiting hole.

[0014] In the aforementioned simple multi-point lock, the elastic component includes a rotary torsion spring. The middle part of the rotary torsion spring is fixed to the lock housing by a pin. One end of the rotary torsion spring is connected to the limiting member, and the other end of the rotary torsion spring is connected to the rod body.

[0015] In summary, the advantages of this invention compared to the prior art are as follows: The latch of this multi-point lock can slide out to the outside of the lock housing through an elastic component. The rotation of the rotating component can cause the latch to slide back into the lock housing. The rotation of the rotating component can also drive the transmission component to slide, which in turn causes the transmission component to drive the straight latch to extend out to the outside of the lock housing or retract into the lock housing. The straight latch is locked by the cooperation of the locking plate and the lever. The overall structure is simple, effectively reducing the number of parts and simplifying the structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 This is a partial structural schematic diagram of an embodiment; Figure 3 This is a schematic diagram of another part of the structure of the embodiment; Figure 4 This is a schematic diagram of the transmission component in an embodiment; Figure 5 This is a schematic diagram of another embodiment.

[0017] Reference numerals: 1. Lock case; 2. Straight latch; 3. Angled latch; 4. Rotating component; 5. Transmission component; 6. Top and bottom hooks; 7. Limiting component; 8. Locking piece; 9. Toggle switch; 10. Pull plate; 11. Strip hole; 12. Limiting shaft; 13. Locking groove; 14. Return torsion spring; 15. Support protrusion; 16. Linkage groove; 17. Linkage protrusion; 18. Guide protrusion; 19. Guide hole; 191. Inclined section; 192. First horizontal positioning section; 193. Second horizontal positioning section; 20. Auxiliary torsion spring; 21. Rod body; 22. Base plate; 23. Limiting hole one; 24. Limiting hole two; 25. Rotary torsion spring; 26. Limiting block; 27. Bearing. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] A simple multi-point lock, such as Figures 1 to 5 As shown, it includes a lock housing 1, a straight latch 2, a slanted latch 3, a rotating component 4, a transmission component 5, and two deadbolts 6.

[0020] The latch 3 is slidably mounted on the lock housing 1. A rod 21 is connected to the latch 3 and the two rotate in coordination. The latch 3 can rotate relative to the rod 21, thereby realizing the reversal of the latch 3, which makes the installation of multi-point locks more convenient.

[0021] A base plate 22 is provided on the rod body 21, and a limiting hole 23 is provided on the lock housing 1. The end of the base plate 22 extends into the limiting hole 23 and the two slide in fit. The end of the base plate 22 is adapted to the limiting hole 23. By fitting the limiting hole 23 with the end of the base plate 22, the sliding guide of the base plate 22, the rod body 21 and the tongue 3 is realized, so that the tongue 3 slides more smoothly. Moreover, by limiting the stroke of the end of the base plate 22 through the limiting hole 23, the maximum stroke position of the tongue 3 can be precisely controlled.

[0022] A limiting member 7 is slidably provided inside the lock housing 1. The limiting member 7 is used to restrict the latch 3 from completely disengaging from the lock housing 1. Specifically, the limiting member 7 is pressed onto the base plate 22, thereby limiting the latch 3 and restricting the latch 3 from moving excessively to the outside of the lock housing 1. When it is necessary to change direction, the limiting member 7 can be moved to disengage it from the base plate 22. At this time, the latch 3 can continue to move to the outside of the lock housing 1 until it is completely disengaged from the lock housing 1. Then the latch 3 can be rotated to change direction.

[0023] Furthermore, the limiting member 7 has a limiting block 26, and the lock housing 1 has a limiting hole 24. The limiting block 26 is adapted to the limiting hole 24 and extends into the limiting hole 24. Through the cooperation between the limiting block 26 and the limiting hole 24, the sliding guide of the limiting member 7 is realized, and the stroke of the limiting member 7 is limited.

[0024] The lock housing 1 is provided with an elastic component that allows the latch 3 to slide out of the lock housing 1 and resets the limiting member 7. In this embodiment, the elastic component includes a rotary torsion spring 25. The middle part of the rotary torsion spring 25 is fixed to the lock housing 1 by a pin. One end of the rotary torsion spring 25 is connected to the limiting member 7, and the other end of the rotary torsion spring 25 is connected to the rod 21. When the user overcomes the elastic force of the rotary torsion spring 25, manually slides the limiting member 7 to disengage it from the base plate 22, and completes the turning of the latch 3, the external force is removed, and the rotary torsion spring 25 can drive the limiting member 7 to slide and reset.

[0025] The rotary torsion spring 25 can also realize the sliding reset of the latch 3. Specifically, the rotating part 4 is rotatably set inside the lock housing 1 and connected to the external handle. The rotation of the rotating part 4 can cause the latch 3 to slide back into the lock housing 1. That is, the user rotates the handle by external force and drives the rotating part 4 to rotate in the positive direction. As the rotating part 4 rotates, it abuts against the base plate 22 and overcomes the elastic force of the rotary torsion spring 25 to continuously push the base plate 22, the rod 21 and the latch 3 to slide, so that the latch 3 retracts into the lock housing 1. When the external force is removed, the restoring force of the rotary torsion spring 25 can push the rod 21 and drive the base plate 22 and the latch 3 to slide reset, so that the latch 3 extends out of the lock housing 1 again.

[0026] Alternatively, the elastic component can also employ two springs, namely, using a corresponding number of springs to slide the tongue 3 back to its original position and to slide the limiter 7 back to its original position.

[0027] In another embodiment, a bearing 27 is provided between the rotating component 4 and the lock housing 1 to reduce the frictional resistance when the rotating component 4 rotates, improve the smoothness and reliability of the rotation of the rotating component 4, and at the same time ensure the relative positional accuracy between the rotating component 4 and the lock housing 1, so as to avoid rotation jamming caused by wear due to long-term use.

[0028] The transmission component 5 is slidably disposed inside the lock housing 1. Both ends of the transmission component 5 are respectively connected to the corresponding deadbolts 6. The straight tongue 2 is slidably disposed in the lock housing 1. The rotation of the rotating component 4 can drive the transmission component 5 to slide, thereby causing the transmission component 5 to drive the straight tongue 2 to extend to the outside of the lock housing 1 or retract into the lock housing 1.

[0029] Specifically, the transmission component 5 has a linkage groove 16, and the rotating component 4 is provided with a linkage protrusion 17. The side wall of the linkage protrusion 17 abuts against the side wall of the linkage groove 16. When the rotating component 4 rotates, the linkage protrusion 17 can push the transmission component 5 to slide. When the rotating component 4 rotates in the forward direction, the side wall of the linkage protrusion 17 abuts against one side wall of the linkage groove 16, thereby pushing the transmission component 5 to slide to one end. It should be noted that the side wall of the linkage groove 16 is inclined. Then, when the rotating component 4 rotates in the reverse direction, the linkage protrusion 17 first disengages from one side wall of the linkage groove 16, and then the side wall of the linkage protrusion 17 abuts against the other side wall of the linkage groove 16, thereby pushing the transmission component 5 to slide to the other end. It should be noted that the side wall of the linkage groove 16 is a vertical plane perpendicular to the sliding direction of the transmission component 5.

[0030] A pull plate 10 is provided on the straight latch 2, and a guide protrusion 18 is provided on the pull plate 10. A guide hole 19 is provided on the transmission component 5. The guide protrusion 18 is adapted to the guide hole 19. The guide protrusion 18 passes through the guide hole 19 and the two are in movable cooperation. When the transmission component 5 slides to one end, the guide protrusion 18 moves along the guide hole 19, thereby driving the pull plate 10 to move. The pull plate 10 drives the straight latch 2 to extend outward to the outside of the lock housing 1. When the transmission component 5 slides to the other end, the guide protrusion 18 moves along the guide hole 19. The guide protrusion 18 moves in the opposite direction along the guide hole 19, thereby driving the pull plate 10 to move in the opposite direction. The pull plate 10 then drives the straight latch 2 to retract inward into the lock housing 1.

[0031] Specifically, the guide hole 19 includes an inclined section 191, a first horizontal positioning section 192, and a second horizontal positioning section 193. The first horizontal positioning section 192 and the second horizontal positioning section 193 are located at the two ends of the inclined section 191, respectively. When the guide protrusion 18 is located in the first horizontal positioning section 192, the straight tongue 2 extends to the outside of the lock housing 1. When the guide protrusion 18 is located in the second horizontal positioning section 193, the straight tongue 2 retracts into the lock housing 1. The first horizontal positioning section 192 and the second horizontal positioning section 193 are parallel to the sliding direction of the transmission member 5. Therefore, when the guide protrusion 18 enters the first horizontal positioning section 192 or the second horizontal positioning section 193, the sliding of the transmission member 5 cannot continue to drive the pull plate 10 to move.

[0032] When the guide protrusion 18 enters the inclined section 191 from the second horizontal positioning section 193 and moves along the inclined section 191 towards the first horizontal positioning section 192, the sidewall of the guide protrusion 18 abuts against the sidewall of the inclined section 191, forming a thrust on the pull plate 10. This causes the pull plate 10 to move and pulls the bolt 2 to extend outward from the lock housing 1 until the guide protrusion 18 enters the first horizontal positioning section 192. At this time, the positions of the pull plate 10 and the bolt 2 remain stable. Conversely, when the guide protrusion 18 enters the inclined section 191 from the first horizontal positioning section 192 and moves along the inclined section 191 towards the second horizontal positioning section 193, the sidewall of the guide protrusion 18 abuts against the sidewall of the inclined section 191, forming a thrust on the pull plate 10. This causes the pull plate 10 to move and pulls the bolt 2 to retract into the lock housing 1 until the guide protrusion 18 enters the second horizontal positioning section 193. At this time, the positions of the pull plate 10 and the bolt 2 remain stable.

[0033] An auxiliary torsion spring 20 is provided inside the lock housing 1. One end of the auxiliary torsion spring 20 is connected to the lock housing 1, and the other end of the auxiliary torsion spring 20 is connected to the transmission component 5. The auxiliary torsion spring 20 can provide a continuous elastic preload to the transmission component 5. When the transmission component 5 slides to one end, the elastic force of the torsion spring assists in pushing the transmission component 5 to move, making the movement of the transmission component 5 smoother and avoiding jamming due to resistance. It can also reduce the driving torque required by the rotating component 4. Conversely, when the transmission component 5 slides to the other end, the transmission component 5 needs to overcome the elastic force of the auxiliary torsion spring 20 to move. The auxiliary torsion spring 20 is twisted and stores elastic potential energy. At the same time, the continuously applied preload keeps the transmission component 5 in close contact with the linkage protrusion 17, eliminating transmission gaps, avoiding the empty stroke in the initial stage of the forward rotation of the rotating component 4, and improving the response speed.

[0034] Furthermore, a strip-shaped hole 11 is provided on the pull plate 10. The length direction of the strip-shaped hole 11 is the same as the moving direction of the pull plate 10. A limit shaft 12 is provided inside the lock housing 1. The limit shaft 12 passes through the strip-shaped hole 11. When the pull plate 10 moves to the limit position, the side wall of the limit shaft 12 can abut against the inner side wall of the strip-shaped hole 11, thereby restricting the pull plate 10 from moving further in this direction. That is, the stroke of the pull plate 10 is limited, thereby limiting the maximum extension stroke position and the maximum retraction stroke position of the straight tongue 2.

[0035] A locking plate 8 is rotatably provided inside the lock housing 1 to lock the extended position of the bolt 2. Specifically, the locking plate 8 is rotatably mounted on the limiting shaft 12. The locking plate 8 has a support protrusion 15. When the bolt 2 is fully extended, the side wall of the support protrusion 15 abuts against the end of the pull plate 10 away from the bolt 2. Through the abutting action of the two, the pull plate 10 is prevented from moving in the direction of bolt 2 retraction, thereby achieving the support and limiting of the bolt 2 and preventing the bolt 2 from being abnormally pushed back into the lock housing 1 under the action of external force.

[0036] A lever 9 is rotatably installed inside the lock housing 1. The lever 9 can lock the locking piece 8 to restrict its rotation. Specifically, the locking piece 8 has a locking groove 13. The lever 9 can enter or disengage from the locking groove 13 when rotated. When the lever 9 is rotated into the locking groove 13, it pushes the locking piece 8 to rotate and locks the locking piece 8. At this time, the rotation of the locking piece 8 is restricted. The side wall of the support protrusion 15 is always abutting against the end of the pull plate 10 away from the straight tongue 2. Therefore, the straight tongue 2 is locked in the state of extending out of the lock housing 1 and cannot be retracted. When the end of the lever 9 is disengaged from the locking groove 13, the locking piece 8 can rotate normally. At this time, the side wall of the support protrusion 15 cannot form an effective abutment with the end of the pull plate 10 away from the straight tongue 2. Therefore, the straight tongue 2 can be retracted into the lock housing 1.

[0037] Furthermore, a reset torsion spring 14 is provided inside the lock housing 1 to reset the locking piece 8 by rotation. When the end of the dial 9 disengages from the locking groove 13, the elastic restoring force of the reset torsion spring 14 causes the locking piece 8 to rotate and reset, and the side wall of the support protrusion 15 disengages from the end of the pull plate 10 away from the straight tongue 2.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the invention; those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A multi-point lock with a simple structure, characterized in that: The lock includes a lock housing (1), a straight latch (2), a beveled latch (3), a rotating component (4), a transmission component (5), and two deadbolts (6). The straight latch (2) and the beveled latch (3) are slidably disposed within the lock housing (1). The transmission component (5) is slidably disposed within the lock housing (1), and both ends of the transmission component (5) are respectively connected to the corresponding deadbolts (6). The rotating component (4) is rotatably disposed within the lock housing (1) and connected to an external handle. The rotation of the rotating component (4) allows the beveled latch (3) to slide back into the lock housing (1). A limiting component (7) is slidably disposed within the lock housing (1), and the limiting component (7) is used to restrict the beveled latch (3). The oblique tongue (3) is completely disengaged from the lock housing (1). The lock housing (1) is provided with an elastic component that allows the oblique tongue (3) to slide out of the lock housing (1) and reset the limiting member (7). The rotation of the rotating member (4) can drive the transmission member (5) to slide, thereby causing the transmission member (5) to drive the straight tongue (2) to extend out of the lock housing (1) or retract into the lock housing (1). The lock housing (1) is rotatably provided with a locking piece (8) for locking the extended position of the straight tongue (2). The lock housing (1) is rotatably provided with a dial (9), which can lock the locking piece (8) to restrict its rotation.

2. A multi-point lock with a simple structure according to claim 1, characterized in that: The straight tongue (2) is provided with a pull plate (10), the pull plate (10) is provided with a strip hole (11), and the lock housing (1) is provided with a limit shaft (12), the limit shaft (12) passes through the strip hole (11).

3. A multi-point lock with a simple structure according to claim 2, characterized in that: The locking piece (8) is rotatably mounted on the limiting shaft (12). The locking piece (8) has a locking groove (13). The knob (9) can rotate to enter or disengage from the locking groove (13). The lock housing (1) is provided with a reset torsion spring (14) for rotating and resetting the locking piece (8).

4. A multi-point lock with a simple structure according to claim 3, characterized in that: The locking piece (8) has a support protrusion (15) that abuts against the end of the pull plate (10) away from the straight tongue (2).

5. A multi-point lock with a simple structure according to claim 4, characterized in that: The transmission component (5) has a linkage groove (16), and the rotating component (4) is provided with a linkage protrusion (17). The side wall of the linkage protrusion (17) abuts against the side wall of the linkage groove (16). When the rotating component (4) rotates, the linkage protrusion (17) can push the transmission component (5) to slide.

6. A multi-point lock with a simple structure according to claim 5, characterized in that: The pull plate (10) is provided with a guide protrusion (18), and the transmission component (5) is provided with a guide hole (19). The guide protrusion (18) passes through the guide hole (19) and the two are in movable cooperation.

7. A multi-point lock with a simple structure according to claim 6, characterized in that: The guide hole (19) includes an inclined section (191), a first horizontal positioning section (192), and a second horizontal positioning section (193). The first horizontal positioning section (192) and the second horizontal positioning section (193) are located at both ends of the inclined section (191). When the guide protrusion (18) is located in the first horizontal positioning section (192), the straight tongue (2) extends to the outside of the lock housing (1). When the guide protrusion (18) is located in the second horizontal positioning section (193), the straight tongue (2) retracts into the lock housing (1).

8. A multi-point lock with a simple structure according to claim 7, characterized in that: An auxiliary torsion spring (20) is provided inside the lock housing (1). One end of the auxiliary torsion spring (20) is connected to the lock housing (1), and the other end of the auxiliary torsion spring (20) is connected to the transmission component (5).

9. A multi-point lock with a simple structure according to any one of claims 1, 2, 3, 4, 5, 6, 7, or 8, characterized in that: The tongue (3) is connected to a rod (21) and the two are rotatably engaged. A base plate (22) is provided on the rod (21). A limiting hole (23) is provided on the lock housing (1). The end of the base plate (22) extends into the limiting hole (23) and the two are slidably engaged. The limiting member (7) can be pressed onto the base plate (22). The limiting member (7) can disengage from the base plate (22). The limiting member (7) has a limiting block (26). A limiting hole (24) is provided on the lock housing (1). The limiting block (26) extends into the limiting hole (24).

10. A multi-point lock with a simple structure according to claim 9, characterized in that: The elastic component includes a rotary torsion spring (25), the middle part of which is fixed to the lock housing (1) by a pin, one end of which is connected to the limiting member (7), and the other end of which is connected to the rod body (21).

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