Transmission mechanism and smart lock adapter

Abstract

The present application relates to a transmission mechanism, comprising a connecting head and a fixing base rotatably connected to the connecting head. A motor, a control circuit board, a battery, and a gear transmission assembly are connected to the fixing base. The motor and the battery are both electrically connected to the control circuit board. A motor gear capable of rotating with a motor shaft is connected to the motor. A first annular recess is recessed inwardly in the connecting head. A plurality of internal gear teeth are circumferentially arranged on the side wall of the first annular recess. The gear transmission assembly meshes with the internal gear teeth. The motor gear passes upward through the fixing base and meshes with the gear transmission assembly. The motor is capable of driving the gear transmission assembly, so that the gear transmission assembly moves around the internal gear teeth. The arrangement of the internal gear teeth provides stable support for the gear transmission assembly, guides a final motion trajectory of the gear transmission assembly, ensures that the gear transmission assembly rotates smoothly along a predetermined path, and avoids power loss or failure caused by gear displacement. The present application further provides a smart lock adapter comprising the transmission mechanism.

Description

A transmission mechanism and a smart lock Technical Field

[0001] This utility model relates to the field of locks, specifically to a transmission mechanism and a smart lock sticker. Background Technology

[0002] With the rapid development of technologies such as the Internet of Things (IoT), mobile internet, and artificial intelligence (AI), smart locks have been rapidly adopted as part of smart homes. Smart locks not only offer enhanced security but also provide functions such as remote control, automatic unlocking, user access management, and access logging. However, existing smart locks typically require a complete replacement of the original mechanical lock system, which increases costs for users and wastes resources.

[0003] Against this backdrop, smart lock stickers have emerged as an innovative solution. A smart lock sticker is a device specifically designed to connect to a standard mechanical lock cylinder, adding intelligent features without altering the original mechanical lock's structure. By installing a smart lock sticker, users can retain their existing mechanical lock cylinder while enjoying the various conveniences and advanced functions offered by smart locks.

[0004] Currently, in existing smart lock designs, the stability and reliability of the transmission mechanism are key performance indicators. Existing smart lock gear transmission components often lack a stable support structure, making them prone to misalignment or wobbling during rotation, leading to inaccurate power transmission or even failure. Especially after prolonged use, the precision of the gear engagement decreases, further affecting system stability. Simultaneously, the gear movement trajectory is not precisely guided, easily causing gears to deviate from the predetermined path. This not only affects the accuracy of unlocking / locking actions but may also lead to gear jamming or damage, increasing maintenance costs and failure rates. For example, the Chinese invention patent with authorization announcement number CN114562157B, publication date May 31, 2022, entitled "An Installation Structure for a Mechanical Lock Drive Device," exhibits these issues.

[0005] Therefore, how to overcome the above-mentioned defects and provide a transmission mechanism and an intelligent lock that are stable in support, transmission, and precision has become an important issue that needs to be addressed by those skilled in the art. Utility Model Content

[0006] This invention overcomes the shortcomings of the above-mentioned technologies and provides a transmission mechanism and an intelligent lock.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A transmission mechanism includes a connector and a fixed base rotatably connected to the connector. A motor, a control circuit board, a battery, and a gear transmission assembly are connected to the fixed base. Both the motor and the battery are electrically connected to the control circuit board. A motor gear, capable of rotating with the motor shaft, is connected to the motor. A first annular groove is recessed in the connector. A plurality of internal gear teeth are circumferentially arranged on the sidewall of the first annular groove. The gear transmission assembly meshes with the internal gear teeth. The motor gear extends upward through the fixed base and meshes with the gear transmission assembly. The motor can drive the gear transmission assembly, causing the gear transmission assembly to move around the internal gear teeth.

[0009] Furthermore, the gear transmission assembly includes a first gear meshing with a motor gear, a second gear coaxially connected above the first gear and rotating synchronously with the first gear, a third gear meshing with the second gear, a fourth gear coaxially connected above the third gear and rotating synchronously with the third gear, a swing arm coaxially disposed above the fourth gear and capable of rotating relative to the fourth gear, a clutch gear rotatably connected to the swing arm and meshing with the fourth gear, a fifth gear meshing with the clutch gear after the clutch gear has rotated to its position, and a sixth gear coaxially connected above the fifth gear and rotating synchronously with the fifth gear, wherein the sixth gear meshes with an inner gear tooth.

[0010] Furthermore, the swing arm includes an upwardly facing connecting column, and the swing arm also includes a downwardly facing first gear shaft, on which the clutch gear is rotatably sleeved.

[0011] Furthermore, both the first gear shaft and the clutch gear are provided in twos. When the motor rotates forward to the position, one of the clutch gears can mesh with the fifth gear, and when the motor rotates in reverse to the position, the other clutch gear can mesh with the fifth gear.

[0012] Furthermore, a second gear shaft and a third gear shaft are also fixedly installed on the fixed base. The first gear and the second gear are coaxially sleeved on the second gear shaft and can rotate synchronously. The third gear and the fourth gear are coaxially sleeved on the third gear shaft and can rotate synchronously.

[0013] Furthermore, the gear transmission mechanism also includes a fourth gear shaft. The fifth gear and the sixth gear are coaxially connected and fixed through the fourth gear shaft and rotate synchronously. The upper end of the fixed seat is provided with a second limiting hole, and the lower end of the fourth gear shaft is fixedly connected in the second limiting hole. When the fixed seat rotates relative to the connector, the sixth gear moves around the inner gear teeth.

[0014] Furthermore, the side wall of the fixing base is recessed to form a motor receiving cavity for accommodating the motor, and the side wall of the fixing base is also recessed to form a battery receiving cavity for accommodating the battery.

[0015] A smart lock includes a transmission mechanism as described above, and a housing rotatably connected to a connector. The fixing seat is detachably connected to the housing and is circumferentially fixed relative to the housing so that it can rotate synchronously with the housing. The bottom of the housing is provided with a button for driving a motor. The middle of the connector is rotatably connected to a connecting shaft with both ends protruding from the connector. One end of the connecting shaft is fixedly connected to the housing, and the other end is used to connect to an external mechanical lock cylinder.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this design, the inner gear teeth are located on the side wall of the first annular groove of the connector, and several are evenly distributed circumferentially, always maintaining meshing with the gear transmission assembly. The inner gear teeth provide stable support to the gear transmission assembly, ensuring it does not deviate or wobble during rotation. They also determine and guide the final motion trajectory of the gear transmission assembly, ensuring smooth rotation along a predetermined path, guaranteeing the accuracy and stability of power transmission, and preventing power loss or failure due to gear misalignment. The precise meshing of the inner gear teeth and the gear transmission assembly forms a closed transmission chain, effectively ensuring that the power transmitted by the motor through the gear transmission assembly accurately reaches the connector. This tight meshing design reduces energy loss during power transmission, improves the system's accuracy and efficiency, and avoids failures due to transmission errors. Precise gear meshing also reduces vibration and noise, making the unlocking action smoother. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the overall assembly state of the transmission mechanism in this case.

[0019] Figure 2 is a structural diagram of the connector in this case.

[0020] Figure 3 is a structural schematic diagram of the fixing base in this case.

[0021] Figure 4 is a structural schematic diagram of the motor and gear transmission assembly in this case.

[0022] Figure 5 is a structural diagram of the smart lock sticker in this case. Detailed Implementation

[0023] The following examples provide a more detailed description of the features and other related characteristics of this utility model, to facilitate understanding by those skilled in the art:

[0024] As shown in Figures 1 to 5, this invention provides a transmission mechanism, including a connector 1 and a fixed base 3 rotatably connected to the connector 1. A motor 4, a control circuit board 5, a battery 6, and a gear transmission assembly 7 are connected to the fixed base 3. The connector 1 is used to connect to an external mechanical lock cylinder, thereby fulfilling the requirement for intelligent control of the mechanical lock cylinder. The fixed base 3 is used to support, install, and fix internal components such as the motor 4, control circuit board 5, battery 6, and gear transmission assembly 7. In specific implementation, both the motor 4 and the battery 6 are electrically connected to the control circuit board 5. A motor gear 42, which can rotate with the motor shaft 41, is connected to the motor 4. A first annular groove 15 is recessed in the connector 1, and several internal gear teeth 151 are circumferentially arranged on the sidewall of the first annular groove 15. The gear transmission assembly 7 meshes with the internal gear teeth 151. The motor gear 42 extends upward through the fixed base 3 and meshes with the gear transmission assembly 7. The motor 4 can drive the gear transmission assembly 7, thereby causing the gear transmission assembly 7 to move around the internal gear teeth 151. This design provides stable support for the gear transmission assembly 7 by setting the inner gear tooth 151, ensuring that it will not deviate or wobble during rotation, thus improving the stability and reliability of power transmission. The inner gear tooth 151 determines and guides the motion trajectory of the gear transmission assembly 7, ensuring that it rotates smoothly along the predetermined path and avoiding power loss or failure caused by gear misalignment. The inner gear tooth 151 and the sixth gear 78 form a closed transmission chain through precise meshing, reducing energy loss during power transmission and improving system efficiency.

[0025] Specifically, as shown in Figures 2 and 4, the gear transmission assembly 7 includes a first gear 71 meshing with the motor gear 42, a second gear 72 coaxially connected above the first gear 71 and rotating synchronously with the first gear 71, a third gear 73 meshing with the second gear 72, a fourth gear 74 coaxially connected above the third gear 73 and rotating synchronously with the third gear 73, a rocker arm 75 coaxially disposed above the fourth gear 74 and capable of rotating relative to the fourth gear 74, a clutch gear 76 rotatably connected to the rocker arm 75 and meshing with the fourth gear 74, a fifth gear 77 meshing with the clutch gear 76 after the clutch gear 76 has rotated to its position, and a sixth gear 78 coaxially connected above the fifth gear 77 and rotating synchronously with the fifth gear 77. The sixth gear 78 meshes with the inner gear teeth 151. The rotation of the swing arm 75 allows for flexible control of the clutch gear 76's movement. This control, through the engagement and disengagement of the clutch gear 76 and the fifth gear 77, enables switching between motor 4 unlocking and knob unlocking. Even if the motor 4 is damaged or the battery 6 is dead, the user can still unlock using the knob unlocking method. This structure also effectively protects the motor 4. Specifically, if the motor 4 fails when the clutch gear 76 and fifth gear 77 are disengaged, or if the battery 6 is dead and cannot unlock, the user can unlock by rotating the housing 2. If the motor 4 fails when the clutch gear 76 and fifth gear 77 are engaged, or if the battery 6 is dead and cannot unlock, this usually occurs when the motor 4's unlocking action is halfway through. In this case, the user can still unlock by rotating the housing 2. Specifically, the rotation of the housing 2 activates the reverse drive gear transmission mechanism 7. Preferably, the first gear 71 and the second gear 72 are integrally designed double gears, and the third gear 73 and the fourth gear 74 are integrally designed double gears. These are separated and named for clarity of description and understanding. The multi-stage gear meshing transmission design of the aforementioned gear transmission assembly 7 facilitates smoother and more precise unlocking.

[0026] Continuing as shown in Figures 2 and 4, the rocker arm 75 further includes an upward-facing connecting post 751. The connecting post 751 is used to rotatably connect the rocker arm 75 to the outside, ensuring that the rocker arm 75 can rotate relative to the outside, while also limiting the rocker arm 75 to prevent displacement that could affect the entire gear transmission mechanism 7. The rocker arm 75 also includes a downward-facing first gear shaft 752, on which the clutch gear 76 is rotatably mounted. The first gear shaft 752 provides a stable rotational fulcrum and limiting support for the clutch gear 76, effectively preventing the clutch gear 76 from disengaging from the fourth gear 75.

[0027] Continuing as shown in Figures 2 and 4, further, both the first gear shaft 752 and the clutch gear 76 are provided in duplicate. When the motor 4 rotates forward to its position, one clutch gear 76 can engage with the fifth gear 77; when the motor 4 rotates in reverse to its position, the other clutch gear 76 can engage with the fifth gear 77. In this case, both the first gear shaft 752 and the clutch gear 76 are provided in duplicate. When the motor 4 rotates forward to its position, one clutch gear 76 can engage with the fifth gear 77; when the motor 4 rotates in reverse to its position, the other clutch gear 76 can engage with the fifth gear 77. By using different clutch gears 76 to lock / unlock through the forward and reverse rotation of the motor 4, the stability and service life of the clutch gear 76 and the entire gear transmission mechanism 7 are effectively improved, the unlocking stroke of the motor 4 is reduced, and a faster response is achieved. As mentioned above, by setting two clutch gears 76, power can be effectively saved, losses reduced, wear on the clutch gear 76 distributed, and the stability and service life of the entire gear transmission mechanism 7 improved. It should be noted that the dual-clutch gear 76 makes the system more stable and reduces the probability of overall failure due to the failure of a single component. Even if one clutch gear 76 malfunctions, the other can still work normally, and the entire gear transmission mechanism 7 can still operate normally, enhancing the system's fault tolerance. By using two clutch gears 76 to handle the forward and reverse rotation of the motor 4 respectively, the logic design of the control system is simplified. The control system only needs to select the corresponding clutch gear 76 according to the rotation direction of the motor 4, without the need for complex intermediate state switching, reducing the complexity of the control system, improving control accuracy, and avoiding malfunctions caused by intermediate state switching.

[0028] Furthermore, as shown in Figures 1, 3, and 4, a second gear shaft 711 and a third gear shaft 731 are also fixedly installed on the fixed base 3. The first gear 71 and the second gear 72 are coaxially sleeved on the second gear shaft 711 and can rotate synchronously. The third gear 73 and the fourth gear 74 are coaxially sleeved on the third gear shaft 731 and can rotate synchronously. The second gear shaft 711 and the third gear shaft 731, which are fixedly installed on the fixed base 3, provide stable rotation shafts for the first gear 71 and the second gear 72, the third gear 73, and the fourth gear 74, respectively, and also serve as supports, ensuring synchronous rotation among these gears and improving the efficiency of power transmission.

[0029] Further referring to Figures 1, 3, and 4, the gear transmission mechanism 7 also includes a fourth gear shaft 771. The fifth gear 77 and the sixth gear 78 are coaxially connected and fixed through the fourth gear shaft 771 and rotate synchronously. The upper end of the fixed base 3 is provided with a second limiting hole 36, and the lower end of the fourth gear shaft 771 is fixedly connected to the second limiting hole 36. When the fixed base 3 rotates relative to the connecting head 1, the sixth gear 78 moves around the inner gear teeth 151. The design of the second limiting hole 36 provides installation space for the fourth gear shaft 771. Since the fourth gear shaft 771 is fixedly connected to the fixed base 3, when the user rotates the fixed base 3, the sixth gear 78 can move around the inner gear teeth 151 to achieve smooth and precise knob-like locking / unlocking.

[0030] As shown in Figures 1 and 3, furthermore, a motor receiving cavity 33 for accommodating the motor 4 is recessed in the side wall of the fixing base 3, and a battery receiving cavity 34 for accommodating the battery 6 is also recessed in the side wall of the fixing base 3. The motor receiving cavity 33 allows the motor 4 to be securely installed on the fixing base 3, and the battery receiving cavity 34 allows the battery 6 to be securely installed on the fixing base 3, improving the stability of the overall structural connection. Through this structural design, the installation space is further reduced by making reasonable use of space design, so that the overall volume of the transmission mechanism of this case is small, making it convenient to apply to smart locks.

[0031] This invention also provides a smart lock, including the aforementioned transmission mechanism, and a housing 2 rotatably connected to the connector 1. A fixing base 3 is detachably connected to the housing 2, and is circumferentially fixed relative to the housing 2 so that it can rotate synchronously with the housing 2. The bottom of the housing 2 is provided with a button 2221 for driving the motor 4. A connecting shaft 12 with both ends extending out of the connector 1 is rotatably connected to the middle of the connector 1. One end of the connecting shaft 12 is fixedly connected to the housing 2, and the other end is used to connect to an external mechanical lock cylinder. By inserting the connecting shaft 12 into the external mechanical lock cylinder, the intelligent control of the mechanical lock cylinder is achieved.

[0032] As stated above, this case protects a transmission mechanism and a smart lock sticker, and all technical solutions that are the same as or similar to this case should be considered to fall within the protection scope of this case.

Claims

1. A transmission mechanism comprising a connecting head (1) and a fixed seat (3) rotatably connected with the connecting head (1), a motor (4), a control circuit board (5), a battery (6) and a gear transmission assembly (7) being connected on the fixed seat (3), the motor (4) and the battery (6) being electrically connected with the control circuit board (5), a motor gear (42) rotatable with a motor shaft (41) being connected on the motor (4), characterized in that: The connector (1) has a first annular groove (15) formed inward. The sidewall of the first annular groove (15) is provided with a plurality of inner gear teeth (151) in the circumferential direction. The gear transmission assembly (7) meshes with the inner gear teeth (151). The motor gear (42) passes through the fixed seat (3) upward and meshes with the gear transmission assembly (7). The motor (4) can drive the gear transmission assembly (7) so that the gear transmission assembly (7) moves around the inner gear teeth (151).

2. A transmission mechanism according to claim 1, characterised in that: The gear transmission assembly (7) includes a first gear (71) meshing with a motor gear (42), a second gear (72) coaxially connected above the first gear (71) and rotating synchronously with the first gear (71), a third gear (73) meshing with the second gear (72), a fourth gear (74) coaxially connected above the third gear (73) and rotating synchronously with the third gear (73), a swing arm (75) coaxially disposed above the fourth gear (74) and capable of rotating relative to the fourth gear (74), a clutch gear (76) rotatably connected to the swing arm (75) and meshing with the fourth gear (74), a fifth gear (77) meshing with the clutch gear (76) after the clutch gear (76) has rotated to its position, and a sixth gear (78) coaxially connected above the fifth gear (77) and rotating synchronously with the fifth gear (77). The sixth gear (78) meshes with the inner gear teeth (151).

3. A transmission mechanism according to claim 2, wherein: The swing arm (75) includes an upwardly facing connecting column (751), and the swing arm (75) also includes a downwardly facing first gear shaft (752), and the clutch gear (76) is rotatably sleeved on the first gear shaft (752).

4. A transmission mechanism according to claim 3, wherein: The first gear shaft (752) and the clutch gear (76) are both provided in twos. When the motor (4) rotates forward to the position, one of the clutch gears (76) can mesh with the fifth gear (77). When the motor (4) rotates in reverse to the position, the other clutch gear (76) can mesh with the fifth gear (77).

5. A transmission mechanism according to claim 4, wherein: The fixed base (3) is also fixedly installed with a second gear shaft (711) and a third gear shaft (731). The first gear (71) and the second gear (72) are coaxially sleeved on the second gear shaft (711) and can rotate synchronously. The third gear (73) and the fourth gear (74) are coaxially sleeved on the third gear shaft (731) and can rotate synchronously.

6. A transmission mechanism according to claim 5, characterized in that: The gear transmission mechanism 7 also includes a fourth gear shaft (771). The fifth gear (77) and the sixth gear (78) are coaxially connected and fixed and rotate synchronously through the fourth gear shaft (771). The upper end of the fixed seat (3) is provided with a second limiting hole (36). The lower end of the fourth gear shaft (771) is fixedly connected in the second limiting hole (36). When the fixed seat (3) rotates relative to the connector (1), the sixth gear (78) moves around the inner gear tooth (151).

7. A transmission mechanism according to claim 1, characterized in that: The side wall of the fixed base (3) is recessed to provide a motor receiving cavity (33) for accommodating the motor (4), and the side wall of the fixed base (3) is also recessed to provide a battery receiving cavity (34) for accommodating the battery (6).

8. A smart lock, comprising the transmission mechanism as described in any one of claims 1-7, characterized in that: It also includes a housing (2) rotatably connected to the connector (1), the fixing seat (3) is detachably connected to the housing (2), the fixing seat (3) is circumferentially fixed relative to the housing (2) so that it can rotate synchronously with the housing (2), the bottom of the housing (2) is provided with a button (2221) for driving the motor (4) to work, the middle of the connector (1) is rotatably connected to a connecting shaft (12) with both ends protruding from the connector (1), one end of the connecting shaft (12) is fixedly connected to the housing (2), and the other end is used to connect to an external mechanical lock cylinder.

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