Door lock drive mechanism

Abstract

The application discloses a door lock transmission mechanism for controlling the state of a door lock, the door lock comprising a first base body and a main lock on the first base body, the transmission mechanism comprising a rotating shaft arranged on the first base body and a clutching rod; one end of the clutching rod is provided with a first blocking part, and the other end of the clutching rod is provided with a first driving part; the main lock is provided with a first blocking matching part matched with the first blocking part; one end of the rotating shaft is provided with a second driving part, the second driving part can rotate along with the rotating shaft, and the second driving part drives the first driving part to move along a predetermined track through rotation, so that the first blocking part is combined with or separated from the first blocking matching part; the door lock transmission mechanism drives the clutching rod to move along the predetermined track through the rotating shaft, the transmission efficiency is high, and the problem that the transmission efficiency of a worm gear mechanism is low can be effectively eliminated; in addition, the scheme is designed through cooperation of the clutching rod and the main lock, the working reliability is high, and the failure rate and the maintenance and production costs are reduced.

Description

Technical Field

[0001] This invention relates to the field of security door lock technology, and in particular to a door lock transmission mechanism. Background Technology

[0002] In existing door lock systems, a common transmission mechanism is the worm gear mechanism. While this mechanism can transmit power, it also has some unavoidable drawbacks. First, the transmission efficiency of the worm gear mechanism is low because its working principle prevents it from achieving full gear transmission, thus significantly reducing power transmission efficiency. Second, due to its enclosed transmission and complex structure, cleaning and maintenance require considerable time and effort. Furthermore, the worm gear mechanism has high requirements for assembly tolerances, resulting in high design and assembly costs. In addition, the worm gear mechanism is noisy, leading to a poor user experience. Therefore, it is necessary to develop a new door lock transmission mechanism to address the problems existing in current technology. Summary of the Invention

[0003] The purpose of this invention is to provide a door lock transmission mechanism that is simple in structure, easy to maintain, and reliable in performance.

[0004] To achieve the above objectives, the present invention discloses a door lock transmission mechanism for controlling the state of a door lock. The door lock includes a first base and a main lock located on the first base. The transmission mechanism includes a rotating shaft and a clutch rod disposed on the first base.

[0005] One end of the clutch lever is provided with a first blocking part, and the other end of the clutch lever is provided with a first driving part;

[0006] The main lock is provided with a first blocking engagement part that is adapted to the first blocking part. When the first blocking part is engaged with the first blocking engagement part, the first blocking part restricts the free extension and retraction movement of the main lock.

[0007] One end of the rotating shaft is provided with a second driving part, which can rotate with the rotating shaft. The second driving part drives the first driving part to move along a predetermined trajectory by rotating, so that the first blocking part and the first blocking mating part can be engaged or disengaged.

[0008] Preferably, the first blocking mating part is a slot.

[0009] Preferably, the second driving part is a lever protruding from the rotating shaft. The lever and the first driving part can move elastically and retract relative to each other to provide clearance space for the rotation of the lever. During the rotation of the lever, there is an interference force between the lever and the first driving part, so that the lever provides a forward driving force or a backward driving force to the first driving part during the rotation. The forward driving force is used to drive the clutch lever to move forward so that the first blocking part engages with the first blocking engagement part. The backward driving force is used to drive the clutch lever to move backward so that the first blocking part disengages from the first blocking engagement part.

[0010] Preferably, the first drive unit includes a receiving cavity disposed on the clutch lever and a movable block disposed within the receiving cavity. The receiving cavity is provided with a first opening facing the shift block, so that the shift block can enter and exit the receiving cavity through the first opening and abut against the movable block. The receiving cavity is also provided with a first elastic member for the movable block, and by means of the first elastic member, the movable block can extend and retract relative to the shift block within the receiving cavity.

[0011] Preferably, the bottom wall of the first base for supporting the clutch lever has a through groove opposite to the first drive part, the bottom wall of the receiving cavity has a second opening, the bottom of the movable block has a navigation post, and the navigation post extends into the through groove through the second opening; a first protrusion extending toward the opposite side of the through groove is provided on the side of the through groove near the lever, and a channel is left between the first protrusion and the other side of the through groove for the navigation post to pass through.

[0012] Preferably, the door lock further includes a first auxiliary lock disposed on a second base, the second base being independent of the first base. The first base is also provided with a first connecting rod capable of reciprocating along a predetermined trajectory. The first connecting rod controls the movement of the first auxiliary lock, causing it to be in a locked or unlocked state. A clutch plate is also disposed between the first connecting rod and the clutch lever. A second blocking portion is disposed on the clutch plate near the first connecting rod, and a second blocking engagement portion is disposed on the first connecting rod that is adapted to the second blocking portion. The clutch lever and the clutch plate are connected by a linkage mechanism, allowing the clutch lever to drive the clutch plate to move synchronously, and causing the second blocking portion to engage or disengage with the second blocking engagement portion. The clutch plate, through the second blocking portion and the second blocking engagement portion, controls the first connecting rod to be in a free or fixed state.

[0013] Preferably, the linkage mechanism between the clutch lever and the clutch plate includes a groove disposed on the clutch plate and a pin disposed on the clutch lever, the pin passing through the groove, and the groove being inclined along the moving direction of the clutch lever.

[0014] Preferably, the first base is further provided with a first drive mechanism, which is connected to the main lock and the first link in a transmission manner to synchronously drive the movement of the main lock and the first link.

[0015] Preferably, the first drive mechanism includes a gear mechanism and a lever sleeved on the shaft of the gear mechanism. The tail of the main lock is provided with a stop post. The free end of the lever abuts against the stop post of the main lock. The lever drives the main lock to retract the lock body by moving the stop post. The first connecting rod is provided with a first tooth that meshes with the gear mechanism.

[0016] Preferably, a third elastic element is further provided in the first base, the third elastic element being used to provide an outwardly extending elastic restoring force for the main lock.

[0017] Preferably, the gear mechanism includes a third gear and a fourth gear that mesh with each other, the lever is sleeved on the shaft of the fourth gear, and the third gear meshes with the first gear teeth.

[0018] Preferably, a toothed plate is also fitted onto the shaft of the third gear, and the toothed plate has a second tooth. The third gear meshes with the first tooth through the second tooth. The toothed plate has a first limiting groove, and a second protrusion located in the first limiting groove is also provided on the outer wall of the shaft of the third gear. The arc length of the first limiting groove is greater than the tooth pitch of the third gear and the arc length of the second protrusion. The second protrusion is used to push the toothed plate to rotate. A third protrusion is provided on the outer wall of the shaft of the fourth gear, and a second limiting groove is provided at the connection part of the lever with the fourth gear. The third protrusion is located in the second limiting groove, and the arc length of the second limiting groove is greater than the tooth pitch of the fourth gear and the arc length of the third protrusion. The third protrusion is used to push the lever to rotate.

[0019] Preferably, the second base is further provided with a second auxiliary lock, and the first base is further provided with a second link and a second drive mechanism that can reciprocate along a predetermined trajectory. The second drive mechanism is used to drive the second link to reciprocate so that the second link performs locking or unlocking operations on the second auxiliary lock.

[0020] Preferably, the first link and the second link are arranged vertically opposite each other.

[0021] Preferably, the second connecting rod is provided with a first waist-shaped hole, and the second driving mechanism includes a swing rod, which can rotate and swing based on rotational force. The free end of the swing rod is provided with a connector that is inserted into the first waist-shaped hole. The diameter of the connector is smaller than the length of the first waist-shaped hole, so that the swing rod drives the second connecting rod to move in a straight line by rotating and swinging.

[0022] Preferably, the system further includes a second base, on which the first and second auxiliary locks are disposed. A third link and a fourth link are disposed on the second base, wherein the third link is connected to the first link and the fourth link is connected to the second link; the third link is used to control the state of the first auxiliary lock and the fourth link is used to control the state of the second auxiliary lock.

[0023] Preferably, the second substrate includes a first carrier plate and a second carrier plate disposed opposite to each other; the third link is slidably connected to the first carrier plate, and the fourth link is slidably connected to the second carrier plate; the third link is connected to the first auxiliary lock via an L-shaped connecting piece, the connecting piece including a first connecting arm, a second connecting arm, and a central portion located between the first connecting arm and the second connecting arm, the connecting piece being pivotally connected to the first carrier plate via the central portion, the first connecting arm being slidably pivotally connected to the first auxiliary lock, and the second connecting arm being slidably pivotally connected to the third link.

[0024] Preferably, the second carrier plate is provided with a first through hole, and the fourth connecting rod is provided with a second through hole. By sliding the fourth connecting rod relative to the second carrier plate, the degree of overlap between the second through hole and the first through hole changes, and the common area of ​​the first through hole and the second through hole forms a lock hole.

[0025] Compared with the prior art, the door lock transmission mechanism disclosed in this invention drives the clutch lever to move along a predetermined trajectory through a rotating shaft, which has high transmission efficiency and can effectively eliminate the problem of low transmission efficiency of worm gear mechanisms. In addition, the solution has high reliability through the cooperation design of the clutch lever and the main lock, which reduces the failure rate and maintenance and production costs. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of a door lock according to one embodiment of the present invention.

[0027] Figure 2 for Figure 1 A structural diagram of the middle door lock without its upper outer casing.

[0028] Figure 3 for Figure 1 Installation and assembly structure diagram of the transmission mechanism.

[0029] Figure 4 for Figure 3 Top view

[0030] Figure 5 for Figure 3 The assembly structure diagram with the supporting substrate removed.

[0031] Figure 6 This is a structural diagram showing the installation and assembly of some structural components inside the door lock in another embodiment of the present invention.

[0032] Figure 7 This is a three-dimensional structural diagram of the clutch lever in an embodiment of the present invention.

[0033] Figure 8 for Figure 5 Structural diagram from the perspective of the outer bottom surface.

[0034] Figure 9 for Figure 8 Enlarged view of section C.

[0035] Figure 10 for Figure 9 Plan view of the through channel.

[0036] Figure 11 for Figure 5 Diagram of the mating structure of the gear mechanism.

[0037] Figure 12 This is a three-dimensional structural diagram of a three-point linkage door lock according to another embodiment of the present invention.

[0038] Figure 13 for Figure 12 A side view of the central main body of the structure.

[0039] Figure 14 for Figure 13 Diagram showing the connection structure between the middle pendulum rod and the second connecting rod.

[0040] Figure 15 for Figure 14 The exploded diagram.

[0041] Figure 16 for Figure 12 A three-dimensional structural diagram of the second matrix from one perspective.

[0042] Figure 17 for Figure 12 A three-dimensional structural diagram of the second matrix from another perspective.

[0043] Figure 18 for Figure 12 The diagram shows the installation and assembly structure of the first carrier plate and the third connecting rod.

[0044] Figure 19 To and Figure 16A plan view of the lock head that works with the second lock. Detailed Implementation

[0045] To illustrate the technical content, structural features, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0046] This embodiment discloses a novel door lock transmission mechanism for controlling the state of a door lock. The door lock in this embodiment includes a first base and a main lock located on the first base. Based on this, as... Figures 1 to 7 The transmission mechanism includes a rotating shaft 2 and a clutch lever 3 disposed on the first base B1.

[0047] One end of the clutch lever 3 is provided with a first blocking part 30, and the other end of the clutch lever 3 is provided with a first driving part 31.

[0048] The main lock S1 is provided with a first blocking engagement part S10 that is adapted to the first blocking part 30. When the first blocking part 30 is engaged with the first blocking engagement part S10, the first blocking part 30 restricts the free extension and retraction of the main lock S1. Correspondingly, when the first blocking part 30 is separated from the first blocking engagement part S10, the main lock S1 can move freely, thereby releasing the locked state of the main lock S1. The user can rotate the door handle to drive the main lock S1 to move, so that the main lock S1 can exit from the lock groove on the door frame.

[0049] A second driving part 20 is provided at one end of the rotating shaft 2. The second driving part 20 can rotate with the rotating shaft 2. The second driving part 20 drives the first driving part 31 to move along a predetermined trajectory by rotating, so that the first blocking part 30 engages or disengages with the first blocking engagement part S10. In this embodiment, the rotating shaft 2 drives the clutch lever 3 to move back and forth in a straight line through the second driving part 20 and the first driving part 31.

[0050] In this embodiment, the clutch lever 3 is driven by the rotating shaft 2 to reciprocate along a predetermined trajectory in a push-pull manner, causing one end of the clutch lever 3 to engage or disengage with the main lock S1, thereby locking or unlocking the main lock S1. This improves the transmission efficiency of the door lock transmission mechanism and effectively eliminates the problem of low transmission efficiency in worm gear mechanisms. Furthermore, this solution, through the cooperative design of the clutch lever 3 and the main lock S1, offers high reliability and reduces the failure rate, maintenance, and production costs.

[0051] Specifically, the first blocking engagement part S10 on the main lock S1 is a slot, and correspondingly, the first blocking part 30 on the clutch lever 3 is a cylindrical structure, so that the first blocking part 30 and the first blocking engagement part S10 can be engaged or disengaged.

[0052] On the other hand, the second driving part 20 is a lever 20 protruding from the rotating shaft 2. The lever 20 and the first driving part 31 can move elastically and retract relative to each other to provide clearance space for the rotation of the lever 20. That is, when the lever 20 approaches the first driving part 31 from one side due to rotation, the lever 20 and the first driving part 31 are relatively moved away due to the compression of the lever 20, so that the lever 20 rotates to the other side of the first driving part 31. During the rotation of the lever 20, there is an interference force between the lever 20 and the first driving part 31, so that the lever 20 provides a forward driving force or a backward driving force to the first driving part 31 during the rotation. The forward driving force is used to drive the clutch lever 3 to move forward so that the first blocking part 30 engages with the first blocking engagement part S10. The backward driving force is used to drive the clutch lever 3 to move backward so that the first blocking part 30 separates from the first blocking engagement part S10.

[0053] In this embodiment, when unlocking is required, the drive shaft 2 rotates, and the drive shaft 2 drives the toggle block 20 to rotate, such as... Figure 4 The lever 20 rotates from side A to side B of the first drive unit 31. During the rotation of the lever 20, the friction between the lever 20 and the first drive unit 31 causes the first drive unit 31 to move backward, thereby separating the first blocking part 30 from the first blocking engagement part S10. Conversely, when locking is required, the rotating shaft 2 reverses, causing the lever 20 to rotate from side B to side A of the first drive unit 31. During the rotation of the lever 20, the friction between the lever 20 and the first drive unit 31 causes the first drive unit 31 to move forward, thereby engaging the first blocking part 30 with the first blocking engagement part S10.

[0054] Specifically, the first drive unit 31 includes a receiving cavity 310 disposed on the clutch lever 3 and a movable block 311 disposed within the receiving cavity 310. The receiving cavity 310 is provided with a first opening 312 facing the shift block 20, so that the shift block 20 can enter and exit the receiving cavity 310 through the first opening 312 and abut against the movable block 311. It should be noted that the first opening 312 includes a window formed in the receiving cavity 310 on the side facing the shift block 20 and a U-shaped groove formed in the top wall of the receiving cavity 310.

[0055] The cavity 310 also houses a first elastic element (not shown) for the movable block 311. With the aid of this first elastic element, the movable block 311 can extend and retract relative to the lever 20 within the cavity 310. In this embodiment, one end of the first elastic element abuts against the movable block 311, and the other end abuts against the rear sidewall of the cavity 310, which is the sidewall opposite to the first opening 312.

[0056] For the first drive unit 31 with the above structure, when the toggle block 20 presses against the movable block 311 due to rotation, the movable block 311 compresses the first elastic member and moves into the receiving cavity 310, thereby providing rotational clearance space for the toggle block 20. When the toggle block 20 rotates to the other side of the movable block 311, the pressing force of the toggle block 20 on the movable block 311 disappears, and then the movable block 311 returns to its original position under the action of the elastic restoring force of the first elastic member.

[0057] Furthermore, please refer to the following: Figures 5 to 10 The first base B1 has a through groove 4 on its bottom wall that supports the clutch lever 3, which is opposite to the first drive part 31. The bottom wall of the receiving cavity 310 has a second opening 313. A navigation post 314 is provided at the bottom of the movable block 311, and the navigation post 314 extends into the through groove 4 through the second opening 313. A first protrusion 40 is provided on the side of the through groove 4 near the lever 20, extending toward the opposite side of the through groove 4, and a channel 41 is left between the first protrusion 40 and the other side of the through groove 4 for the navigation post 314 to pass through.

[0058] In this embodiment, the through groove 4 is divided into two interconnected parts by setting a first protrusion 40 in the through groove 4, namely a first positioning groove 42 and a second positioning groove 43. The navigation post 314 on the movable block 311 can move back and forth between the first positioning groove 42 and the second positioning groove 43 via the channel 41. When the navigation post 314 is in the first positioning groove 42, due to the action of the first elastic member, if the movable block 311 moves the navigation post 314 backward, it will be blocked by the first protrusion 40, thereby limiting the movable block 311 to this position and preventing unlocking due to vibration.

[0059] Specifically, when the clutch lever 3 is in the locked state, the first blocking part 30 on the clutch lever 3 engages with the first blocking mating part S10 on the main lock S1, and the navigation column 314 is located in the first positioning groove 42. When it is necessary to perform an unlocking operation on the clutch lever 3, the toggle block 20 rotates, pushing the movable block 311 to compress the first elastic element and move to the other side of the first positioning groove 42, thereby causing the navigation column 314 to break free from the restriction of the first protrusion 40 and enter the second positioning groove 43 through the channel 41. At this time, the squeezing force applied by the toggle block 20 to the movable block 311 disappears, and under the action of the elastic restoring force of the first elastic element, the navigation column 314 stays in the second positioning groove 43, and under the blocking action of the first protrusion 40, the movable block 311 is restricted from moving forward autonomously.

[0060] To facilitate user operation, a first operating handle P1 is provided at one end of the rotating shaft 2, which is used to drive the rotating shaft 2 to rotate. Additionally, a lock cylinder X can be installed at the other end of the rotating shaft 2. When installing the door lock, the side with the first operating handle P1 is installed on the inside of the door, and the side with the key cylinder X is installed on the outside of the door.

[0061] In another preferred embodiment of the present invention, to enhance the security performance of the door lock, the door lock is a three-point linkage door lock, that is, as shown in the figure. Figure 12 In addition to the main lock S1, two first auxiliary locks S2 are also configured. The main lock S1 is used to lock the middle of the security door, and the two first auxiliary locks S2 are used to lock the upper and lower ends of the security door respectively. For this three-point linkage door lock, in order to simultaneously control the state of the auxiliary locks while operating the clutch lever 3 to control the state of the main lock S1, the transmission mechanism inside the door lock is further improved. Please refer to the following embodiment for details.

[0062] Please refer to the following: Figures 3 to 5 and Figure 12 The first base B1 is also provided with a first connecting rod 5 that can reciprocate along a predetermined trajectory. The first connecting rod 5 is used to control the movement of the first auxiliary lock S2, so that the first auxiliary lock S2 is in a locked or unlocked state. That is, the first connecting rod 5 controls the first auxiliary lock S2 to exit or enter the lock slot on the door frame. Specifically, the two first auxiliary locks S2 are respectively connected to the two ends of the first connecting rod 5. When the first connecting rod 5 moves, it simultaneously controls the two first auxiliary locks S2 to move synchronously.

[0063] A clutch plate 6 is also provided between the first connecting rod 5 and the clutch lever 3. A second blocking part 60 is provided on the side of the clutch plate 6 near the first connecting rod 5. A second blocking mating part 50 adapted to the second blocking part 60 is provided on the first connecting rod 5. Specifically, the second blocking part 60 is a protrusion, and the second blocking mating part 50 is a groove.

[0064] The clutch lever 3 and the clutch plate 6 are connected by a linkage mechanism so that the clutch lever 3 can drive the clutch plate 6 to move synchronously, and the second blocking part 60 and the second blocking engagement part 50 can be engaged or disengaged. The clutch plate 6 controls the first connecting rod 5 to be in a free state or a fixed state by means of the second blocking part 60 and the second blocking engagement part 50.

[0065] With the configuration of the first link 5 and clutch plate 6 in the above structure, when unlocking is required, the clutch rod 3 is moved backward by rotating shaft 2. The clutch rod 3 drives the clutch plate 6 away from the first link 5 through the linkage mechanism, so that the second blocking part 60 separates from the second blocking engagement part 50. This allows the main lock S1 and the first link 5 to be in a freely movable state. In this way, the main lock S1 can be controlled to exit from its corresponding lock groove by the door handle operating mechanism, and the first auxiliary lock S2 can be controlled to exit from its corresponding lock groove by pulling the first link 5.

[0066] Therefore, when the rotating shaft 2 rotates, it can simultaneously drive the clutch lever 3 and the clutch plate 6 to move, which not only has a simple structure but also makes it convenient for users to operate.

[0067] Specifically, the clutch mechanism is configured as follows: the linkage between the clutch lever 3 and the clutch plate 6 includes a groove 61 on the clutch plate 6 and a pin 32 on the clutch lever 3. The pin 32 passes through the groove 61, which is inclined along the direction of movement of the clutch lever 3. In this embodiment, through the arrangement of the groove 61 and the pin 32, when the clutch lever 3 moves backward in a straight line, it pulls the clutch plate 6 to move away from the first connecting rod 5, thereby enabling the clutch lever 3 and the clutch plate 6 to move synchronously in two perpendicular directions.

[0068] On the other hand, a first driving mechanism is also provided on the first base B1. The first driving mechanism is connected to the main lock S1 and the first connecting rod 5 for synchronously driving the movement of the main lock S1 and the first connecting rod 5. In this embodiment, when the clutch lever 3 is disengaged from the main lock S1 by rotating the shaft 2 and the clutch plate 6 is disengaged from the first connecting rod 5, the first driving mechanism drives the main lock S1 and the first connecting rod 5 to move synchronously, thereby causing the main lock S1 and the first auxiliary lock S2 to exit the lock groove synchronously, so as to unlock.

[0069] Specifically, the first drive mechanism includes a gear mechanism 70 and a lever 71 sleeved on the shaft of the gear mechanism 70. A stop post S11 is provided at the tail of the main lock S1. The free end of the lever 71 abuts against the stop post S11 of the main lock S1. The lever 71 drives the main lock S1 to retract the lock body by moving the stop post S11. The first connecting rod 5 is provided with a first tooth 51 that meshes with the gear mechanism 70.

[0070] In this embodiment, the working principle of the first driving mechanism is as follows: After the clutch lever 3 and clutch plate 6 are separated from the main lock S1 and the first connecting rod 5 respectively, the gear mechanism 70 rotates, which drives the lever 71 to rotate. The free end of the lever 71 pushes the stop pin S11 on the main lock S1 backward, thereby causing the main lock S1 to exit from its corresponding lock slot. At the same time as the gear mechanism 70 rotates, it also drives the first connecting rod 5 to move in a straight line through the first tooth 51, thereby pulling the two first auxiliary locks S2 at both ends out of their corresponding lock slots.

[0071] Furthermore, after unlocking, in order to automatically reset the main lock S1 and the two first auxiliary locks S2 to their extended locked state, a third elastic element T is also provided inside the first base B1. The third elastic element T is used to provide the main lock S1 with an outward elastic restoring force. In this embodiment, the third elastic element T is a torsion spring.

[0072] It should be noted that, as Figure 2In this embodiment, the main lock S1 includes two parallel locking tongues, namely the first locking tongue S1' and the second locking tongue S1"". The tail of the first locking tongue S1' abuts against the tail of the second locking tongue S1"". A stop bar S11 is provided on the first locking tongue S1'. Thus, when the lever 71 moves the first locking tongue S1' backward, the first locking tongue S1' will also move the second locking tongue S1" backward synchronously.

[0073] In addition, a torsion spring (such as) is configured for the first latch S1' and the second latch S1" respectively. Figure 6 This allows the first and second locking tongues to automatically return to their extended positions.

[0074] On the other hand, such as Figures 3 to 6 The gear mechanism 70 includes a third gear 72 and a fourth gear 73 that mesh with each other. The lever 71 is sleeved on the shaft of the fourth gear 73, and the third gear 72 meshes with the first tooth 51. In this embodiment, the first connecting rod 5 and the main lock S1 are driven by the cooperation of the third gear 72 and the fourth gear 73, respectively, which results in better stability and higher reliability.

[0075] Furthermore, the third gear 72 is the driving gear, the fourth gear 73 is the driven gear, and the first base B1 is also provided with a second operating handle P2 connected to the third gear 72 (e.g., Figure 2 A toothed plate 74 is also fitted on the rotating shaft 2 of the third gear 72. The toothed plate 74 is provided with a second tooth 741. The third gear 72 meshes with the first tooth 51 through the second tooth 741. That is, the toothed plate 74 directly meshes with the first connecting rod 5. The third gear 72 drives the toothed plate 74 to rotate, and the toothed plate 74 then drives the first connecting rod 5 to move in a straight line through the first tooth 51 and the second tooth 741.

[0076] Furthermore, the gear 74 is provided with a first limiting groove 740, and the outer wall of the shaft of the third gear 72 is also provided with a second protrusion 720 located in the first limiting groove 740. The arc length of the first limiting groove 740 is greater than the tooth pitch of the third gear 72 and the arc length of the second protrusion 720. The second protrusion 720 is used to push the gear 74 to rotate.

[0077] A third protrusion 730 is provided on the outer wall of the shaft of the fourth gear 73. A second limiting groove 710 is provided on the connection part of the lever 71 and the fourth gear 73. The third protrusion 730 is located in the second limiting groove 710. The arc length of the second limiting groove 710 is greater than the tooth pitch of the fourth gear 73 and the arc length of the third protrusion 730. The third protrusion 730 is used to push the lever 71 to rotate. In this embodiment, the tooth pitch of the third gear 72 and the fourth gear 73 are equal.

[0078] Based on the above structural configuration, when the rotating shaft 2 rotates at a small angle, the second protrusion 720 cannot abut against the side wall inside the first limiting groove 740, and the third protrusion 730 cannot abut against the side wall inside the second limiting groove 710. Therefore, the third gear 72 will not drive the gear 74 to rotate, and the third gear 72 will not drive the lever 71 to rotate. Consequently, the main lock S1 and the two first auxiliary locks S2 cannot be operated and will not activate. This design avoids the immediate response of the main lock S1 and the two first auxiliary locks S2 when the rotating shaft 2 rotates by a small amount due to user error, effectively improving the user experience and extending the lifespan of the door lock.

[0079] On the other hand, in some applications, an inner door (such as a screen door) is also installed inside the security door, and the inner door is also equipped with a lock. Therefore, to enable the lock to simultaneously lock and unlock the inner door, the lock in this embodiment also includes a second lock S3. Figure 16 ),like Figure 12 , 13 The first base B1 is also provided with a second connecting rod 8 and a second driving mechanism that can reciprocate along a predetermined trajectory. The second driving mechanism is used to drive the second connecting rod 8 to reciprocate, so that the second connecting rod 8 performs locking or unlocking operations on the second auxiliary lock S3. In this embodiment, when it is necessary to operate the second auxiliary lock S3 to lock or unlock the inner door, the second driving mechanism drives the second connecting rod 8 to move linearly along the predetermined trajectory. In this embodiment, there are also two second auxiliary locks S3, respectively arranged at both ends of the second connecting rod 8.

[0080] Specifically, the first link 5 and the second link 8 are arranged vertically opposite each other to save layout space.

[0081] In addition, such as Figure 14 and Figure 15 The second connecting rod 8 is provided with a first oblong hole 80. The second driving mechanism includes a swing rod 9, which can rotate and swing based on rotational force. The free end of the swing rod 9 is provided with a connector 90 that plugs into the first oblong hole 80. The diameter of the connector 90 is smaller than the length of the first oblong hole 80, so that the swing rod 9 drives the second connecting rod 8 to move in a straight line through rotational swing. In this embodiment, the first oblong hole 80 on the swing rod 9 and the second connecting rod 8 achieves the purpose of driving linear motion through rotational motion, which is more efficient and saves more installation space.

[0082] Furthermore, to facilitate the control of the rotation of the lever 9, such as Figure 2 A third operating handle P3 is also provided on the first base B1. The third operating handle P3 is connected to the swing arm 9 via a connecting rod G. When the third operating handle P3 is rotated, the swing arm 9 can be rotated and swung through the connecting rod G, which facilitates operation.

[0083] Furthermore, such as Figure 12 And from 16 to 18, the installation structure of the first auxiliary lock S2 and the second auxiliary lock S3 is as follows: a second base B2 is provided, which is separate from the first base B1. The first auxiliary lock S2 and the second auxiliary lock S3 are mounted on the second base B2. A third link 100 and a fourth link 101 are provided on the second base B2. The third link 100 is connected to the first link 5, and the fourth link 101 is connected to the second link 8. The third link 100 is used to control the state of the first auxiliary lock S2, and the fourth link 101 is used to control the state of the second auxiliary lock S3.

[0084] Specifically, since there are two first locks S2 and two second locks S3, two second bases B2 are correspondingly configured. In use, the first base B1 is generally installed in the middle of the door, and the two second bases B2 are installed at the upper and lower ends of the door, respectively. When the first link 5 is activated, it simultaneously drives the third link 100 on the two upper and lower second bases B2 to activate, thereby activating the two first locks S2. When the second link 8 is activated, it simultaneously drives the fourth link 101 on the two upper and lower second bases B2 to activate, thereby activating the two second locks S3.

[0085] Furthermore, such as Figures 16 to 18 The second substrate B2 includes a first carrier plate B20 and a second carrier plate B21 disposed opposite to each other. A third connecting rod 100 is slidably connected to the first carrier plate B20, and a fourth connecting rod 101 is slidably connected to the second carrier plate B21.

[0086] The third link 100 is connected to the first auxiliary lock S2 via an L-shaped connecting piece 102. The connecting piece 102 includes a first connecting arm 1020, a second connecting arm 1021, and a central portion 1022 located between the first connecting arm 1020 and the second connecting arm 1021. The connecting piece 102 is pivotally connected to the first carrier plate B20 via the central portion 1022. The first connecting arm 1020 is slidably pivotally connected to the first auxiliary lock S2, and the second connecting arm 1021 is slidably pivotally connected to the third link 100.

[0087] Specifically, the third link 100 is provided with a second oblong hole 103, and the first carrier plate B20 is provided with a first connecting post 104 that is adapted to the second oblong hole 103. When the first link 5 applies a pushing / pulling force to the third link 100, the third link 100 slides along the first connecting post 104 through the second oblong hole 103.

[0088] The first connecting arm 1020 has a third oblong hole 106, and the second connecting arm 1021 has a fourth oblong hole 109. The first auxiliary lock S2 has a second connecting post 107 adapted to the third oblong hole 106, and the third connecting rod 100 has a third connecting post 108 adapted to the fourth oblong hole 109. A linear groove 110 is provided on the first carrier plate B20, which is slidably connected to the second connecting post 107, to limit the movement trajectory of the second connecting post 107, thereby allowing the first auxiliary lock S2 to perform telescopic movement in a linear motion. Figure 18 When the third link 100 is pulled down along direction F1, the second connecting arm 1021 is driven to rotate downwards in an arc shape through the third connecting post 108 and the fourth oblong hole 109. Correspondingly, the first connecting arm 1020 is driven to rotate upwards in an arc shape. Then, with the cooperation of the third oblong hole 106, the second connecting post 107, and the linear slide groove 110, the first auxiliary lock S2 is driven to extend outwards (lock). Similarly, when the third link 100 is pushed up along direction F2, the second connecting arm 1021 is driven to rotate upwards in an arc shape through the third connecting post 108 and the fourth oblong hole 109. Correspondingly, the first connecting arm 1020 is driven to rotate downwards in an arc shape. Then, with the cooperation of the third oblong hole 106, the second connecting post 107, and the linear slide groove 110, the first auxiliary lock S2 is driven to retract inwards (unlock).

[0089] In addition, a torsion spring 111 is provided on the third connecting post 108. The torsion spring 111 is used to provide the first auxiliary lock S2 with a lateral outward elastic restoring force so that the first auxiliary lock S2 can automatically reset to the locked state.

[0090] In the above embodiments, the main lock S1 and the first auxiliary lock S2 are both solid blocks that mate with lock slots on the door frame. However, for the second auxiliary lock S3, as... Figure 16 The lock hole is designed to fit the hook on the inner door. Therefore, in this embodiment, the second lock S3 is configured as follows: a first through hole S30 is provided on the second carrier plate B21, and a second through hole S31 is provided on the fourth connecting rod 101. By sliding the fourth connecting rod 101 relative to the second carrier plate B21, the degree of overlap between the second through hole S31 and the first through hole S30 changes, and the common area of ​​the first through hole S30 and the second through hole S31 forms the lock hole. That is, when the degree of overlap between the second through hole S31 and the first through hole S30 is zero, the first through hole S30 cannot be blocked by the fourth connecting rod 101, thus maximizing the common area of ​​the first through hole S30. When sliding the fourth connecting rod 101 increases the degree of overlap between the second through hole S31 and the first through hole S30, a portion of the first through hole S30 is blocked by the fourth connecting rod 101, thus reducing the common area of ​​the first through hole S30.

[0091] When using the second lock S3 with the above structure, as follows: Figure 19A columnar lock head M needs to be installed on the inner door or inner door. The front end of the lock head M is a pointed structure M1, and the rear end of the lock head M has a slot M2 that opens to one side.

[0092] For the second auxiliary lock S3 with the above structure, its locking process is as follows: When the second auxiliary lock S3 is separated from the lock head M, the overlap between the second through hole S31 and the first through hole S30 is relatively large, causing a portion of the first through hole S30 to be blocked by the fourth link 101. Then, the lock head M is manipulated to approach the first through hole S30, and the tip structure M1 at the front end of the lock head M is inserted into the first through hole S30 and the second through hole S31. As the lock head M extends, it pushes open the portion of the fourth link 101 that was blocking the first through hole S30, allowing the lock head M to fully enter the first through hole S30 and the second through hole S31. When the slot M2 on the lock head M enters the second through hole S31, the space freed up in the slot allows the fourth link 101 to reset to a state where the first through hole S30 and the second through hole are misaligned again, causing the opening of the first through hole S30 to decrease, thereby locking the lock head M in the part of the first through hole S30 that is directly opposite the second through hole S31.

[0093] In addition, after the lock head M enters the second through hole S31, in order to facilitate the automatic reset of the fourth link 101, a third elastic element 112 is provided between the fourth link 101 and the second base B2. The fourth elastic element 112 provides the fourth link 101 with a force that causes the first through hole S30 and the second through hole S31 to be misaligned.

[0094] In summary, this invention discloses a three-point linkage door lock, which includes a main lock S1 mounted on a first base B1, two first auxiliary locks S2 mounted on two second bases B2, and two second auxiliary locks S3. Rotation of the drive shaft 2 can simultaneously unlock the main lock S1 and the two first auxiliary locks S2. The structure is simple and highly reliable. Furthermore, the two second auxiliary locks S3 also provide a locking function for the inner door simultaneously.

[0095] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A door lock transmission mechanism for controlling the state of a door lock, the door lock comprising a first base and a main lock located on the first base, characterized in that, The transmission mechanism includes a rotating shaft and a clutch lever disposed on the first base; One end of the clutch lever is provided with a first blocking part, and the other end of the clutch lever is provided with a first driving part; The main lock is provided with a first blocking engagement part adapted to the first blocking part. When the first blocking part is engaged with the first blocking engagement part, the first blocking part restricts the free extension and retraction movement of the main lock. One end of the rotating shaft is provided with a second driving part. The second driving part can rotate with the rotating shaft. The second driving part drives the first driving part to move along a predetermined trajectory by rotating, so that the first blocking part and the first blocking mating part can be engaged or disengaged. The door lock also includes a first auxiliary lock disposed on a second base. The second base is independent of the first base. The first base is also provided with a first connecting rod that can reciprocate along a predetermined trajectory. The first connecting rod is used to control the movement of the first auxiliary lock so that the first auxiliary lock is in a locked state or an unlocked state. A clutch plate is also provided between the first connecting rod and the clutch rod. A second blocking part is provided on the clutch plate near the first connecting rod. A second blocking engagement part is provided on the first connecting rod that is adapted to the second blocking part. The clutch rod and the clutch plate are connected by a linkage mechanism so that the clutch rod can drive the clutch plate to move synchronously, and cause the second blocking part and the second blocking engagement part to engage or disengage. The clutch plate controls the first connecting rod to be in a free state or a fixed state by means of the second blocking part and the second blocking engagement part.

2. The door lock transmission mechanism according to claim 1, characterized in that, The first blocking part is a slot.

3. The door lock transmission mechanism according to claim 1, characterized in that, The second driving part is a lever protruding from the rotating shaft. The lever and the first driving part can move elastically and retract relative to each other to provide clearance space for the rotation of the lever. During the rotation of the lever, there is an interference force between the lever and the first driving part, so that the lever provides a forward driving force or a backward driving force to the first driving part during the rotation. The forward driving force is used to drive the clutch lever to move forward so that the first blocking part engages with the first blocking engagement part. The backward driving force is used to drive the clutch lever to move backward so that the first blocking part disengages from the first blocking engagement part.

4. The door lock transmission mechanism according to claim 3, characterized in that, The first drive unit includes a receiving cavity disposed on the clutch lever and a movable block disposed within the receiving cavity. The receiving cavity is provided with a first opening facing the shift block, so that the shift block can enter and exit the receiving cavity through the first opening and abut against the movable block. The receiving cavity is also provided with a first elastic member for the movable block, and by means of the first elastic member, the movable block can extend and retract relative to the shift block within the receiving cavity.

5. The door lock transmission mechanism according to claim 4, characterized in that, The first base has a through groove on its bottom wall that supports the clutch lever, which is opposite to the first drive part. The bottom wall of the receiving cavity has a second opening. A navigation post is provided at the bottom of the movable block. The navigation post extends into the through groove through the second opening. A first protrusion is provided on the side of the through groove near the lever, extending toward the opposite side of the through groove. A channel is left between the first protrusion and the other side of the through groove for the navigation post to pass through.

6. The door lock transmission mechanism according to claim 1, characterized in that, The linkage mechanism between the clutch lever and the clutch plate includes a groove on the clutch plate and a pin on the clutch lever. The pin passes through the groove, and the groove is inclined along the direction of movement of the clutch lever.

7. The door lock transmission mechanism according to claim 1, characterized in that, The first base is also provided with a first driving mechanism, which is connected to the main lock and the first connecting rod for synchronously driving the movement of the main lock and the first connecting rod.

8. The door lock transmission mechanism according to claim 7, characterized in that, The first driving mechanism includes a gear mechanism and a lever sleeved on the shaft of the gear mechanism. The tail of the main lock is provided with a stop post. The free end of the lever abuts against the stop post of the main lock. The lever drives the main lock to retract the lock body by moving the stop post. The first connecting rod is provided with a first tooth that meshes with the gear mechanism.

9. The door lock transmission mechanism according to claim 8, characterized in that, The first base body is also provided with a third elastic element, which is used to provide the main lock with an outward elastic restoring force.

10. The door lock transmission mechanism according to claim 9, characterized in that, The gear mechanism includes a third gear and a fourth gear that mesh with each other. The lever is sleeved on the shaft of the fourth gear, and the third gear meshes with the first gear.

11. The door lock transmission mechanism according to claim 10, characterized in that, A toothed plate is also fitted onto the shaft of the third gear, and the toothed plate has a second tooth. The third gear meshes with the first tooth through the second tooth. The toothed plate has a first limiting groove, and a second protrusion located in the first limiting groove is also provided on the outer wall of the shaft of the third gear. The arc length of the first limiting groove is greater than the tooth pitch of the third gear and the arc length of the second protrusion. The second protrusion is used to push the toothed plate to rotate. A third protrusion is provided on the outer wall of the shaft of the fourth gear, and a second limiting groove is provided at the connection part of the lever with the fourth gear. The third protrusion is located in the second limiting groove, and the arc length of the second limiting groove is greater than the tooth pitch of the fourth gear and the arc length of the third protrusion. The third protrusion is used to push the lever to rotate.

12. The door lock transmission mechanism according to claim 1, characterized in that, The second base is also provided with a second auxiliary lock, and the first base is also provided with a second link and a second drive mechanism that can reciprocate along a predetermined trajectory. The second drive mechanism is used to drive the second link to reciprocate so that the second link can perform locking or unlocking operations on the second auxiliary lock.

13. The door lock transmission mechanism according to claim 12, characterized in that, The first link and the second link are arranged vertically opposite each other.

14. The door lock transmission mechanism according to claim 12, characterized in that, The second connecting rod is provided with a first waist-shaped hole, and the second driving mechanism includes a swing rod. The swing rod can rotate and swing based on rotational force. The free end of the swing rod is provided with a connector that is inserted into the first waist-shaped hole. The diameter of the connector is smaller than the length of the first waist-shaped hole, so that the swing rod drives the second connecting rod to move in a straight line by rotating and swinging.

15. The door lock transmission mechanism according to claim 12, characterized in that, It also includes a second base, on which the first and second auxiliary locks are disposed. A third link and a fourth link are disposed on the second base. The third link is connected to the first link, and the fourth link is connected to the second link. The third link is used to control the state of the first auxiliary lock, and the fourth link is used to control the state of the second auxiliary lock.

16. The door lock transmission mechanism according to claim 15, characterized in that, The second base includes a first carrier plate and a second carrier plate disposed opposite to each other; the third connecting rod is slidably connected to the first carrier plate, and the fourth connecting rod is slidably connected to the second carrier plate; the third connecting rod is connected to the first auxiliary lock through an L-shaped connecting piece, the connecting piece including a first connecting arm, a second connecting arm and a central portion located between the first connecting arm and the second connecting arm, the connecting piece being pivotally connected to the first carrier plate through the central portion, the first connecting arm being slidably pivotally connected to the first auxiliary lock, and the second connecting arm being slidably pivotally connected to the third connecting rod.

17. The door lock transmission mechanism according to claim 16, characterized in that, The second carrier plate is provided with a first through hole, and the fourth connecting rod is provided with a second through hole. By sliding the fourth connecting rod relative to the second carrier plate, the degree of overlap between the second through hole and the first through hole changes, and the common area of ​​the first through hole and the second through hole forms a lock hole.

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