A clutch drive device built into the rear handle of an electronic door lock

Abstract

The clutch transmission device built into the rear handle of an electronic door lock proposed by the present invention includes a handle and a handle seat for mounting the handle on the rear panel of the door. The handle has a receiving chamber, in which a motor, a spur gear, an intermediate transmission gear and a transmission output mechanism are provided. The motor has an output shaft, on which a spur gear is fixed. The spur gear is arranged on one side of the intermediate transmission gear, and a transmission output mechanism is provided on the other side of the intermediate transmission gear opposite to the spur gear. The handle shaft of the transmission output mechanism extends out of the receiving chamber of the handle, passes through the handle seat and is connected to the lock core mechanism inside the door panel. When the motor operates to rotate the spur gear, it drives the intermediate transmission gear to rotate, thereby driving the handle shaft of the transmission output mechanism to rotate forward / backward, realizing the electric clutch of the lock core mechanism. The advantages of the present invention are that the electric and manual drive clutches are integrated into the rear handle, with good versatility, and the installation of the non-destructive clutch transmission device can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and particularly relates to a clutch transmission device built into the rear handle of an electronic door lock. Background Art

[0002] The door handle is an important part of the door lock. By controlling the door handle to drive the door lock transmission member to rotate, the opening of the door lock can be achieved. In the prior art, the door handle of an electronic door lock is only a component for transmitting the force of people twisting to unlock. Generally, such a door handle is solid. Even if the door handle is of a hollow structure, the internal space is very narrow. Therefore, people usually design the complex clutch control mechanism and electronic components of the electronic door lock in the lock body rather than in the door handle. Since there is sufficient space in the lock body to accommodate all the detection and automatic control mechanisms, this kind of lock body structure is generally large in volume, high in price, and not convenient for installation and maintenance.

[0003] As we know, the clutch control mechanisms of current electronic door locks on the market are divided into two categories. One category has the clutch on the electronic lock panel. By controlling the disconnection and connection of the electronic lock handle and the square rod through the clutch, when the clutch is closed, the square rod can transfer the rotation on the handle to the lock body to open the door. The advantage of this type of lock is that the lock body is a pure mechanical component with relatively good reliability and low cost. However, there are also significant compatibility problems. There are a wide variety of mechanical lock bodies on the market currently, and there is no unified standard for the sizes and specifications of the positions of the square rods. Even more troublesome is that some mechanical lock bodies can only open one diagonal bolt for the external square rod connection hole, unable to meet the need for the electronic lock to open all the lock tongues. Therefore, when installing this type of electronic lock, it is necessary to remove the original lock body on the door and replace it with a mechanical lock body that matches the electronic lock to ensure the normal operation of the electronic lock. The other category has the clutch built into the lock body. The door handle is connected to the square rod hole on the inner lock body of the door through the square rod. After the electronic module passes the authentication, it controls the clutch in the lock body to connect and close the square rod hole of the lock body and the actuator of the lock body. In this way, the square rod can convert the force on the handle into the force to control the lock tongues of the lock body, thereby opening the door. This type of electronic lock with the clutch in the lock body must replace the mechanical lock body on the door during the installation process, facing the same process of lock body disassembly as the first type of electronic lock. Since during the process of replacing the lock body, the opening on the door for the new lock body may be different from the position of the lock body, it is necessary to make a new opening on the door. Even worse, the position and size of the insertion holes for the lock tongues on the door frame also need to be adjusted according to different lock bodies. This installation method damages the original structure of the door and the door frame, which is called "destructive" installation in the industry. It will directly cause the original door and door frame of the user to be damaged, and the work mistakes of the installation workers will lead to the replacement of the door and the door frame, bringing great trouble to the user. Even more troublesome is that since the lock bodies selected by each electronic lock are different, when the user replaces an electronic lock of another brand, the door and the door frame are very likely to be damaged again.

[0004] The Chinese patent publication number is CN106223731A, and the title is a direct drive transmission device for a door lock motor. This patent discloses a direct drive transmission device for a door lock motor, which includes a lock core, a bar, an unlocking knob, a driving bevel gear, a reduction motor, a motor bevel gear, an optoelectronic switch, a grating encoding disk, an inner door panel, a bottom plate, a buffer pad, and a locking cover. The driving bevel gear meshes with the motor bevel gear, and the reduction motor is connected and cooperated with the motor bevel gear through its power output end. Specifically, the motor bevel gear and the driving bevel gear are a pair of meshing bevel gears. The reduction motor transmits the power stage torque to the motor bevel gear through its power output end. The motor bevel gear meshes with the driving bevel gear to transfer the power to the bar through the buffer pad inside the driving bevel gear, and the bar rotates to drive the lock core and the unlocking knob to rotate, realizing automatic locking or unlocking. The unlocking knob is arranged on the inner door panel, and the inner door panel is installed on the inner side of the door during installation. The driving bevel gear, the reduction motor, the motor bevel gear, the optoelectronic switch, the grating encoding disk, the buffer pad, and the locking cover are arranged on the bottom plate, and the buffer pad is tightly combined with the driving bevel gear. The grating encoding disk is arranged between the end faces of the reduction motor and the motor bevel gear, and the notch of the optoelectronic switch cooperates with the grating encoding disk. When the reduction motor is in motion, its power output end drives the grating encoding disk to rotate, and the optoelectronic switch is used to detect the rotation signal of the grating encoding disk. The buffer pad is arranged inside the driving bevel gear, and the protruding part of the driving bevel gear passes through the round hole of the bottom plate and is fixedly connected with the locking cover. The bar passes through the inner door panel, sequentially passing through the driving bevel gear, the bottom plate, the lock core, the buffer pad, and the locking cover. Specifically, the bar passes through the center of the driving bevel gear, one end is connected to the unlocking knob, and the other end is connected to the lock core. However, this solution has the following disadvantages: 1. The direct drive transmission device of the motor is installed inside the lock body, and the lock body needs to be disassembled during installation and maintenance, resulting in high costs. 2. The handle of this patent is a pure torque component.

[0005] In summary, on the one hand, how to solve non-destructive installation will be an important issue in the after-market of electronic locks. On the other hand, in order to reduce the cost, reduce the volume, and realize the function of electronic unlocking of electronic door locks, technicians are striving to explore whether all the functions of electronic door lock control can be realized inside the rear handle. The clutch drive mechanism arranged inside the rear handle is the key component. Summary of the Invention

[0006] To solve the above existing problems, the present invention provides a clutch drive device built into the rear handle of an electronic door lock.

[0007] The technical solution of the present invention is realized as follows:

[0008] The present invention discloses a clutch transmission device built into the rear handle of an electronic door lock, which includes a handle and a handle seat for mounting the handle on the door rear panel. The handle has a receiving chamber, and a motor, a spur gear, an intermediate transmission gear, and a transmission output mechanism are arranged in the receiving chamber. The motor has an output shaft, and a spur gear is fixed on the output shaft. The spur gear is arranged on one side of the intermediate transmission gear, and a transmission output mechanism is arranged on the other side of the intermediate transmission gear opposite to the spur gear. The handle shaft of the transmission output mechanism extends out of the receiving chamber of the handle, passes through the handle seat, and is connected to the lock core mechanism inside the door panel. When the motor operates to rotate the spur gear, it drives the intermediate transmission gear to rotate, thereby driving the handle shaft of the transmission output mechanism to rotate forward / backward to lock or unlock the lock core mechanism.

[0009] Further, the intermediate transmission gear includes a main gear and a sub-gear. The sub-gear is provided at the center of the upper end of the main gear. An annular friction surface is provided around the central axis at the lower end of the main gear. The outer diameter of the main gear is larger than that of the sub-gear. A ring of teeth is provided circumferentially at the upper end edge of the main gear, and the ring of teeth meshes with the spur gear.

[0010] Further, it also includes a manual operation mechanism fixedly installed on the handle. When the manual operation mechanism abuts against the intermediate transmission gear, the manual operation mechanism rotates synchronously with the handle, driving the handle shaft of the transmission output mechanism to rotate, so as to open the lock core mechanism.

[0011] Further, the manual operation mechanism includes a key plate, an operating rod, and a return spring. One end of the key plate is rotatably connected to the handle, and the other end of the key plate is a free end, which is fixedly connected to one end of the operating rod. The other end of the operating rod penetrates into the receiving chamber of the handle and cooperates with the annular friction surface of the main gear of the intermediate transmission gear. One end of the return spring is connected to the free end close to the key plate, and the other end is connected to the handle.

[0012] Further, the end of the operating rod corresponding to the annular friction surface of the main gear of the intermediate transmission gear has a wear-resistant contact part.

[0013] Further, the transmission output mechanism includes a fixed internal gear ring, a rotating shaft, a first-stage transmission pair, and a second-stage transmission pair. The first-stage transmission pair and the second-stage transmission pair are sleeved on the rotating shaft, and the fixed internal gear ring is arranged in cooperation with the outside of the first-stage transmission pair and the second-stage transmission pair.

[0014] Further, the first-stage transmission pair includes a sun gear, a first planetary gear carrier, and first planetary gears. The first planetary gear carrier is evenly provided with three first planetary shafts around the central axis. There are three first planetary gears, which are respectively sleeved on the first planetary shafts. One side of the three first planetary gears close to the central axis of the first planetary gear carrier meshes with the output teeth of the sun gear, and the other side of the three first planetary gears meshes with the internal teeth of the fixed internal gear ring.

[0015] Further, the second-stage transmission pair includes a second planetary gear carrier fixed on the rotating shaft. The second planetary gear carrier is evenly provided with four second planetary shafts around the rotating shaft. Each second planetary shaft is sleeved with a second planetary gear. One side of the four second planetary gears close to the rotating shaft meshes with the first planetary gear carrier, and the other side of the four second planetary gears meshes with the internal teeth of the fixed internal gear ring.

[0016] Further, the rotating shaft, the handle shaft, the second planetary gear carrier, and the four second planetary shafts are all of an integrally formed structure.

[0017] Further, a spring return mechanism for mechanically rotating the handle is provided between the handle and the handle seat.

[0018] Implementing a clutch transmission device built into the rear handle of an electronic door lock of the present invention has the following beneficial technical effects:

[0019] Different from the prior art where the clutch is arranged inside the door lock body, the clutch transmission device built into the rear handle of the electronic door lock of the present invention integrates a manual and an electric drive mechanism. The clutch is installed inside the rear handle, with a high degree of integration, and can realize the installation of a non-destructive clutch transmission device. Therefore, it has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic exploded view of the clutch transmission device built into the rear handle of the electronic door lock of the present invention;

[0022] Figure 2 It is a schematic partial structure view of the clutch transmission device built into the rear handle of the electronic door lock of the present invention;

[0023] Figure 3 is Figure 2 a schematic structural view of another perspective;

[0024] Figure 4 Another exploded structural schematic diagram of the clutch transmission device built into the rear handle of the electronic door lock according to the present invention;

[0025] Figure 5 A transmission structural schematic diagram of the clutch transmission device built into the rear handle of the electronic door lock according to the present invention;

[0026] Figure 6 A structural schematic diagram of the intermediate transmission gear of the clutch transmission device built into the rear handle of the electronic door lock according to the present invention;

[0027] Figure 7 A connection structural schematic diagram of the first planetary gear carrier and the first planetary shaft of the clutch transmission device built into the rear handle of the electronic door lock according to the present invention;

[0028] Figure 8 A structural schematic diagram of the rotating shaft, the handle shaft and the second planetary gear carrier of the clutch transmission device built into the rear handle of the electronic door lock according to the present invention.

[0029] In the figure, handle - 1, handle bottom shell - 1a, handle cover - 1b, handle seat - 2, motor - 3, spur gear - 4, intermediate transmission gear - 5, main gear - 51, sub - gear - 52, annular friction surface - 53, ring teeth - 54, transmission output mechanism - 6, handle shaft - 61, square hole - 610, fixed internal gear ring - 62, rotating shaft - 63, first - stage transmission pair - 64, second - stage transmission pair - 65, sun gear - 641, first planetary gear carrier - 642, first planetary gear - 643, first planetary shaft - 644, first - stage transmission teeth - 645, second planetary gear carrier - 651, second planetary shaft - 652, second planetary gear - 653, manual operation mechanism - 7, key board 71, free end - 710, operating rod - 72, return spring - 73, spring return mechanism - 8, return fixing plate - 81, return torsion spring - 82. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0032] Please refer to Figures 1 to 5, the present invention provides a preferred embodiment of a clutch transmission device built into the rear handle of an electronic door lock, including a handle 1 and a handle base 2 for mounting the handle 1 on the door rear panel. The handle 1 has a receiving chamber, and the hand-held portion of the handle 1 is composed of a handle bottom shell 1a and a handle cover 1b. The shape of the handle 1 conforms to ergonomics to facilitate hand-held operation. A motor 3, a spur gear 4, an intermediate transmission gear 5, and a transmission output mechanism 6 are provided in the receiving chamber of the handle 1. Specifically, the motor 3 is fixedly installed on the handle bottom shell 1a. The motor 3 has an output shaft, and a spur gear 4 is fixed on the output shaft. The spur gear 4 is also called a straight gear. The spur gear 4 is disposed on one side of the intermediate transmission gear 5, and a transmission output mechanism 6 is provided on the other side of the intermediate transmission gear 5 opposite to the spur gear 4. The transmission output mechanism 6 has a handle shaft 61. The handle shaft 61 extends out of the receiving chamber of the handle 1 and passes through the handle base 2 and then is connected to the lock core mechanism inside the door panel. When the motor 3 is powered on and operates, the motor 3 drives the spur gear 4 to rotate, and the spur gear 4 drives the intermediate transmission gear 5 to rotate, thereby driving the handle shaft 61 of the transmission output mechanism 6 to rotate forward / backward to lock or unlock the lock core mechanism.

[0033] As Figure 5 and Figure 6 shown, the intermediate transmission gear 5 includes a main gear 51 and a sub-gear 52. The sub-gear 52 is provided at the center of the upper end of the main gear 51. The main gear 51 and the sub-gear 52 are integrally formed coaxially, and the outer diameter of the main gear 51 is larger than the outer diameter of the sub-gear 52. An annular friction surface 53 is provided around the central axis at the lower end of the main gear 51. The annular friction surface 53 exactly corresponds to the handle bottom shell 1a. A ring of teeth 54 is provided circumferentially at the upper end edge of the main gear 51. The ring of teeth 54 meshes with the spur gear 4.

[0034] As Figure 4 , Figure 5 and Figure 7 shown, the transmission output mechanism 6 includes a fixed internal gear ring 62, a rotating shaft 63, a first-stage transmission pair 64, and a second-stage transmission pair 65. The first-stage transmission pair 64 and the second-stage transmission pair 65 are sleeved on the rotating shaft 63, and the fixed internal gear ring 62 is provided on the outer sides of the first-stage transmission pair 64 and the second-stage transmission pair 65 in a matching manner. The fixed internal gear ring 62 is fixedly installed on the handle 1. The rotating shaft 63 is fixedly connected to one end of the handle shaft 61. The other end of the handle shaft 61 has a square hole 610 for connecting the square rod of the lock core mechanism. The first-stage transmission pair 64 drives the second-stage transmission pair 65 to rotate, thereby driving the rotating shaft 63 and the handle shaft 61 to rotate.

[0035] The first-stage transmission pair 64 includes a sun gear 641, a first planetary gear carrier 642, and a first planetary gear 643. A first-stage transmission tooth 645 is provided at the center of the lower end of the first planetary gear carrier 642. Three first planetary shafts 644 are uniformly provided around the central axis at the upper end of the first planetary gear carrier 642 (as Figure 7) There are three first planetary gears 643, which are respectively sleeved on the first planetary shaft 644. The three first planetary gears 643 are meshed with the output teeth of the sun gear 641 on the side close to the central axis of the first planetary gear carrier 642, and the other sides of the three first planetary gears 643 are meshed with the internal teeth of the fixed internal gear ring 62. The sun gear 641 is composed of an input tooth and an output tooth. The input tooth and the output tooth are coaxially arranged, and the outer diameter of the input tooth is larger than the outer diameter of the output tooth. The input tooth of the sun gear 641 is meshed with the secondary gear 52 of the intermediate transmission gear 5.

[0036] The second-stage transmission pair 65 includes a second planetary gear carrier 651 fixed on the rotating shaft 63. Specifically, the second planetary gear carrier 651 is installed at the connection of the rotating shaft 63 and the handle shaft 61. There are four second planetary shafts 652 evenly arranged around the rotating shaft 63 on the second planetary gear carrier 651. Each second planetary shaft 652 is sleeved with a second planetary gear 653. The four second planetary gears 653 are meshed with the first-stage transmission teeth 645 of the first planetary gear carrier 642 on the side close to the rotating shaft 63, and the other sides of the four second planetary gears 653 are meshed with the internal teeth of the fixed internal gear ring 62. Further, as Figure 8 shown, the rotating shaft 63, the handle shaft 61, the second planetary gear carrier 651 and the four second planetary shafts 652 are all integrally formed structures, which is beneficial to improving the transmission stability of the transmission output mechanism.

[0037] The electric clutch process of this embodiment is as follows: When powered on, press the unlock key on the handle 1 once, the motor 3 drives the spur gear 4 to rotate forward, the spur gear 4 drives the intermediate transmission gear 5 to rotate, thereby driving the handle shaft 61 of the transmission output mechanism 6 to rotate forward, and driving the lock core mechanism to realize the unlocking function; press the lock key on the handle 1 once, the motor 3 drives the spur gear to rotate in the reverse direction, the spur gear 4 drives the intermediate transmission gear 5 to rotate back, thereby driving the handle shaft 61 of the transmission output mechanism 6 to rotate in the reverse direction, and driving the lock core mechanism to realize the locking function. It should be noted that, different from the prior art, in the technical solution of the present invention, when the electric clutch unlocks or locks, the handle 1 does not rotate along with the clutch transmission device.

[0038] As Figure 3 and Figure 4As shown in the figure, an embodiment of the present invention further includes a manual operation mechanism 7 fixedly installed on the handle 1. The manual operation mechanism 7 includes a key panel 71, an operating rod 72, and a return spring 73. One end of the key panel 71 is rotatably connected to the handle 1, and the other end of the key panel 71 is a free end 710. The free end 710 is fixedly connected to one end of the operating rod 72. The other end of the operating rod 72 penetrates into the accommodation chamber of the handle 1 and cooperates with the annular friction surface 53 of the main gear 51 of the intermediate transmission gear 5. One end of the return spring 73 is connected to the free end 710 close to the key panel 71, and the other end is connected to the handle 1. Further, the end of the operating rod 72 corresponding to the annular friction surface 53 of the main gear 51 of the intermediate transmission gear 5 has a wear-resistant contact portion to increase the friction force when the operating rod 72 abuts against the intermediate transmission gear 5. When the manual operation mechanism 7 is in use, press the key panel 71 with your hand. The contact portion of the operating rod 72 connected to the key panel 71 abuts against the annular friction surface 53 of the main gear 51 of the intermediate transmission gear 5. At the same time, rotate the handle 1. The intermediate transmission gear 5 rotates together with the handle 1, and the intermediate transmission gear 5 drives the transmission output mechanism 6 to rotate the handle shaft 61, completing the manual door opening of the lock core mechanism.

[0039] In an embodiment of the present invention, as Figure 4 shown in the figure, a spring return mechanism 8 for mechanically rotating the handle is provided between the handle 1 and the handle base 2. The spring return mechanism 8 includes a return fixing plate 81 and a return torsion spring 82 installed on the return fixing plate 81. The spring return mechanism 8 is used in cooperation with the manual operation mechanism 7.

[0040] The manual clutch process of the embodiment is as follows: When it is necessary to manually open the door inside the door, while holding the handle 1 and rotating it, press the key panel 71 on the handle 1 (as Figure 3 shown in the figure). The manual operation mechanism 7 is connected to the intermediate transmission gear 5. The rotation of the handle 1 drives the intermediate transmission gear 5 to rotate, and drives the transmission output mechanism 6 to rotate, so that the handle shaft 61 rotates to drive the lock core mechanism to complete unlocking. When the handle 1 is released, the key panel 71 is reset under the action of the return spring 73. The intermediate transmission gear 5 is separated from the manual operation mechanism 7, and the handle 1 is reset under the action of the spring return mechanism 8. The lock core mechanism automatically locks due to the loss of the rotation force.

[0041] Implementing a clutch transmission device built into the rear handle of an electronic door lock according to the present invention has the following beneficial technical effects:

[0042] Different from the prior art where the clutch is arranged inside the door lock body, the clutch transmission device built into the rear handle of the electronic door lock of the present invention integrates a manual and an electric drive mechanism into one and is installed inside the rear handle, with a high degree of integration. It can achieve the installation of a non-destructive clutch transmission device. Therefore, it has good versatility.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A clutch transmission device built into the rear handle of an electronic door lock, comprising a handle (1) and a handle seat (2) for mounting the handle (1) on the rear panel of the door, characterized in that, The handle (1) has a receiving chamber, in which a motor (3), a spur gear (4), an intermediate transmission gear (5) and a transmission output mechanism (6) are arranged. The intermediate transmission gear (5) includes a main gear (51) and a sub-gear (52). At the center of the upper end of the main gear (51), a sub-gear (52) is provided. Around the central axis at the lower end of the main gear (51), an annular friction surface (53) is provided. The motor (3) has an output shaft, on which a spur gear (4) is fixed. The spur gear (4) is arranged on one side of the intermediate transmission gear (5). On the other side of the intermediate transmission gear (5) opposite to the spur gear (4), a transmission output mechanism (6) is provided. The handle shaft (61) of the transmission output mechanism (6) extends out of the receiving chamber of the handle (1), passes through the handle base (2), and is connected to the lock core mechanism in the door panel. When the motor (3) works to rotate the spur gear (4), it drives the intermediate transmission gear (5) to rotate, thereby driving the handle shaft (61) of the transmission output mechanism (6) to rotate forward / backward to lock or unlock the lock core mechanism. It further includes a manual operation mechanism (7) fixedly installed on the handle (1). The manual operation mechanism (7) includes a key plate (71) and an operating rod (72). One end of the key plate (71) is rotatably connected to the handle (1), and the other end of the key plate (71) is a free end (710). The free end (710) is fixedly connected to one end of the operating rod (72). The other end of the operating rod (72) penetrates into the receiving chamber of the handle (1) and cooperates with the annular friction surface (53) of the main gear (51) of the intermediate transmission gear (5). When the manual operation mechanism (7) abuts against the intermediate transmission gear (5), the manual operation mechanism (7) rotates synchronously with the handle (1), driving the handle shaft (61) of the transmission output mechanism (6) to rotate, so that the lock core mechanism opens the door.

2. The clutch transmission device built into the rear handle of an electronic door lock according to claim 1, characterized in that, The outer diameter of the main gear (51) is larger than that of the sub-gear (52). Around the upper end edge of the main gear (51) in the circumferential direction, a ring gear (54) is provided. The ring gear (54) meshes with the spur gear (4).

3. The clutch transmission device built into the rear handle of an electronic door lock according to claim 1, characterized in that, The manual operation mechanism (7) includes a return spring (73). One end of the return spring (73) is connected to the free end (710) close to the key plate (71), and the other end is connected to the handle (1).

4. The clutch drive device built into the rear handle of the electronic door lock according to claim 1, characterized in that, The end of the operating rod (72) corresponding to the annular friction surface (53) of the main gear (51) of the intermediate transmission gear (5) has a wear-resistant contact part.

5. The clutch transmission device built into the rear handle of the electronic door lock according to claim 1, characterized in that, The transmission output mechanism (6) includes a fixed internal gear ring (62), a rotating shaft (63), a first-stage transmission pair (64) and a second-stage transmission pair (65). The first-stage transmission pair (64) and the second-stage transmission pair (65) are sleeved on the rotating shaft (63), and the fixed internal gear ring (62) is provided in cooperation with the outside of the first-stage transmission pair (64) and the second-stage transmission pair (65).

6. The clutch transmission device built into the rear handle of the electronic door lock according to claim 5, characterized in that, The first-stage transmission pair (64) includes a sun gear (641), a first planet carrier (642), and first planet gears (643). The first planet carrier (642) is provided with three first planet shafts (644) evenly around the central axis. There are three first planet gears (643), which are respectively sleeved on the first planet shafts (644). One side of the three first planet gears (643) close to the central axis of the first planet carrier (642) meshes with the output teeth of the sun gear (641), and the other side of the three first planet gears (643) meshes with the internal teeth of the fixed internal gear ring (62).

7. The clutch drive device built into the rear handle of the electronic door lock according to claim 6, characterized in that, The second-stage transmission pair (65) includes a second planet carrier (651) fixed on the rotating shaft (63). The second planet carrier (651) is provided with four second planet shafts (652) evenly around the rotating shaft (63). A second planet gear (653) is sleeved on each second planet shaft (652). One side of the four second planet gears (653) close to the rotating shaft (63) meshes with the first planet carrier (642), and the other side of the four second planet gears (653) meshes with the internal teeth of the fixed internal gear ring (62).

8. The clutch transmission device built into the rear handle of the electronic door lock according to claim 7, characterized in that, The rotating shaft (63), the handle shaft (61), the second planet carrier (651), and the four second planet shafts (652) are integrally formed.

9. The clutch transmission device built into the rear handle of an electronic door lock according to any one of claims 1-8, characterized in that, A spring return mechanism (8) for the mechanical rotation of the handle (1) is provided between the handle (1) and the handle seat (2).

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