Transmission structure of electronic lock

Abstract

A transmission structure of an electronic lock comprises a front handle internally provided with a transmission cavity, the transmission cavity is communicated with a front transmission through hole penetrating through the outer side of the front handle, a rotatable front shaft sleeve is installed in the front transmission through hole, and a linkage groove is formed in the front shaft sleeve; a clutch insertion shaft used for being inserted into the linkage groove and a clutch block used for enabling the clutch insertion shaft to act relative to the linkage groove are installed in the transmission cavity in a sliding mode, and the movement direction of the clutch insertion shaft is the same as that of the clutch block. A driving groove is formed in the clutch block, a spiral groove is formed in the driving groove, a driving shaft is inserted into the driving groove in a penetrating mode, the driving shaft is in transmission connection with an output shaft of the motor, and a sliding protruding part sliding in the spiral direction of the spiral groove is fixedly arranged on the peripheral face of the driving shaft. According to the front handle, lateral component force causing inclination of the clutch insertion shaft is eliminated, the risk of inclination of the clutch insertion shaft is reduced, and therefore the reliability of the whole front handle is improved, and the service life of the whole front handle is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of electronic lock technology, specifically to a transmission structure for an electronic lock. Background Technology

[0002] To achieve intelligent unlocking, existing technologies include ball locks with electric switches. Referring to the technical solution disclosed in application number CN202420549295.7, an intelligent ball lock is described. In this solution, when unlocking, the output end of the motor is connected to a screw threaded into a plastic sliding shaft. When the motor rotates forward, the plastic sliding shaft moves forward, contacting a pin and compressing a spring, causing the pin to retract inward and insert into the linkage groove, connecting with a square rod sleeve. The square rod is fixed inside the square rod sleeve. At this time, rotating the front lock body drives the square rod to rotate the latch lock body, unlocking it and disengaging the latch lock body from the door strike hole. When locking, the motor rotates in reverse, and the plastic sliding shaft moves backward. Due to the spring force, the pin extends outward, separating from the square rod sleeve. At this time, rotating the front lock body is free-spinning and cannot unlock.

[0003] The above-mentioned structural scheme can realize the clutch control between the front lock body and the square rod sleeve. However, when the plastic slide shaft pushes the pin inward, the movement direction of the plastic slide shaft is perpendicular or nearly perpendicular to the movement direction of the pin. This causes the lateral thrust of the plastic slide shaft to be converted into the axial displacement of the pin through the inclined surface during the inward process. This non-axial force will generate a large lateral component force on the pin. When the pin retracts, it is prone to tilting due to the influence of the lateral component force, which makes it impossible for the pin end to be accurately aligned with the axis of the linkage groove, or even misaligned. This not only increases the resistance of the pin to inserting into the linkage groove, but may also prevent the pin from being inserted into the linkage groove, causing the linkage function between the front lock body and the square rod sleeve to fail. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a transmission structure for an electronic lock.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An electronic lock transmission structure includes a front handle with an internal transmission cavity. The transmission cavity is connected to a front transmission through-hole penetrating the outside of the front handle. A rotatable front axle sleeve is installed in the front transmission through-hole. The front axle sleeve has a linkage groove. The characteristic feature is that a clutch insert shaft for insertion into the linkage groove and a clutch block for enabling the clutch insert shaft to move relative to the linkage groove are slidably installed in the transmission cavity. The clutch insert shaft and the clutch block move in the same direction. The clutch block has a drive groove with a helical groove inside. A drive shaft passes through the drive groove and is drively connected to the output shaft of a motor. A sliding protrusion that slides along the helical direction of the helical groove is fixed on the outer circumferential surface of the drive shaft.

[0007] In this invention, the motor is connected to a control circuit board, and the control circuit board is electrically connected to an unlocking control panel located at the front end of the front handle.

[0008] In this invention, the control circuit board integrates a charging interface, and the first front housing of the front handle is provided with a charging opening corresponding to the charging interface.

[0009] In this utility model, a mounting base is provided inside the transmission cavity, a guide module is provided on the mounting base, a translation guide groove is provided on the guide module, and the clutch block is guided and engaged with the translation guide groove.

[0010] In this invention, the output shaft of the motor is provided with a driving gear, and one end of the drive shaft is provided with a driven gear, which meshes with the driving gear.

[0011] In this utility model, the first front housing of the front handle is provided with a linkage guide groove for guiding the movement of the clutch insert shaft. The linkage guide groove is provided with a linkage limiting groove. The clutch insert shaft is movably fitted in the linkage guide groove. The clutch insert shaft is provided with a clutch limiting part for moving in the linkage limiting groove.

[0012] In this invention, the clutch insert shaft is connected to an elastic element for keeping it disengaged from the linkage groove.

[0013] In this utility model, the elastic element is a first compression spring. The elastic element is fitted on the clutch insert shaft. One end of the elastic element presses against the groove wall of the linkage limiting groove, and the other end presses against the end of the clutch limiting part near the linkage groove.

[0014] In this utility model, the clutch block is provided with a mating groove, a first adapter through hole at one end of the mating groove, and a second adapter through hole at the other end of the mating groove. The mating groove, the first adapter through hole, and the second adapter through hole constitute the driving groove. A second compression spring fitted on the drive shaft is positioned and installed in the mating groove. The sliding protrusion passes through the spaces between the coils of the second compression spring. The gap between the coils of the second compression spring constitutes the spiral groove.

[0015] In this utility model, a telescopic lock cylinder is also provided inside the transmission cavity, and an unlocking hole communicating with the transmission cavity is also provided on the outer side of the front handle. The unlocking hole corresponds to the key hole of the telescopic lock cylinder, and the push rod head of the telescopic lock cylinder is connected to the clutch block.

[0016] The beneficial effects of this utility model are as follows: By setting the movement direction of the clutch block and the movement direction of the clutch insert shaft to be in the same direction, this utility model eliminates the lateral force that causes the clutch insert shaft to tilt, allowing the clutch insert shaft to maintain its axial stability throughout the entire retraction and extension process. This reduces the risk of the clutch insert shaft tilting, improves the success rate of the clutch insert shaft inserting into the linkage groove when it extends, and ensures the reliability of the linkage action between the front axle sleeve and the front handlebar. At the same time, it avoids hard friction, impact and jamming caused by the tilting of the clutch insert shaft, reduces abnormal wear and stress concentration of related parts, and thus improves the reliability and service life of the entire front handlebar. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 A three-dimensional view of the combination of the front handlebar, drive lever, and rear handlebar;

[0019] Figure 2 This is an exploded view of the front handle.

[0020] Figure 3 This is a sectional view of the front handle.

[0021] Figure 4 This is a schematic diagram of the transmission between the drive shaft and the motor;

[0022] Figure 5 This is a schematic diagram of the combination of the elastic element and the clutch insert shaft;

[0023] Figure 6 This is a schematic diagram of the combination of the drive shaft and the second compression spring;

[0024] Figure 7 A combined sectional view of the front handlebar, drive lever, and rear handlebar;

[0025] Figure 8 This is a sectional view of the rear handle. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0027] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] Furthermore, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection using welding, a detachable connection using bolts, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] Reference Figure 1-8 An electronic lock transmission structure includes a front handle 100 with an internal transmission cavity 101. The transmission cavity 101 is connected to a front transmission through hole 102 penetrating the outside of the front handle 100. A rotatable front bushing 1 is installed in a bushing rotation groove 103 of the front transmission through hole 102. The front bushing 1 has at least one linkage groove 11 distributed circumferentially thereon. A clutch insert 2 for insertion into the linkage groove 11 and a clutch block 3 for enabling the clutch insert 2 to move relative to the linkage groove 11 are slidably guided in the transmission cavity 101. The movement direction of the clutch insert 2 is the same as the movement direction of the clutch block 3. The clutch block 3 has a drive groove, and a spiral groove is provided in the drive groove. A drive shaft 4 passes through the drive groove. The drive shaft 4 is connected to the output shaft of a motor 5. The motor 5 is located in the transmission cavity 101. A sliding protrusion 41 that slides along the spiral direction of the spiral groove is fixed on the outer circumferential surface of the drive shaft 4.

[0031] When unlocking, the clutch block 3 slides and translates along the spiral direction of the spiral groove when the drive shaft 4 rotates. The clutch block 3 is based on the clutch insertion shaft 2 being inserted into the linkage groove 11 when it translates along the first direction, and the clutch insertion shaft 2 being able to disengage from the linkage groove 11 when it translates along the second direction. The first direction and the second direction are opposite. When the clutch insertion shaft 2 is inserted into the linkage groove 11, the front handle 100 and the front axle sleeve 1 can rotate synchronously, so that the front handle 100 can drive the transmission rod 300 to achieve transmission by using the front axle sleeve 1.

[0032] This embodiment eliminates the lateral force that causes the clutch pin 2 to tilt by setting the movement direction of the clutch block 3 to be in the same direction as the movement direction of the clutch pin 2. This ensures that the clutch pin 2 maintains its axial stability throughout the entire retraction and extension process, reducing the risk of the clutch pin 2 tilting and improving the success rate of the clutch pin 2 inserting into the linkage slot 11 when it extends. This ensures the reliability of the linkage action between the front axle sleeve 1 and the front handlebar 100. At the same time, it avoids hard friction, impact and jamming caused by the tilt of the clutch pin 2, reduces abnormal wear and stress concentration of related parts, and thus improves the reliability and service life of the entire front handlebar 100.

[0033] In this embodiment, the front handle 100 includes a first front housing 104 and a second front housing 105 mounted on the front end of the first front housing 104. The front axle portion of the first front housing 104 is rotatably mounted in the front mounting shaft hole of the front mounting seat 106. A first retaining ring 107 is provided on the front axle portion of the first front housing 104 to restrict the front axle portion in the front mounting shaft hole, thereby completing the combined installation between the first front housing 104 and the front mounting seat 106. Simultaneously, the first front housing 104 and the second front housing 105 are connected by bolts. The inner cavity of the first front housing 104 and the inner cavity of the second front housing 105 form the transmission cavity 101. The rear end of the first front housing 104 is the front axle portion, and the front transmission through hole 102 is provided on the front axle portion. The front axle is provided with a front derailleur that rotates synchronously with it. The front derailleur and the front mounting base 106 are connected by a front return torsion spring. The front return torsion spring is used to rotate the front handle 100 to return to its original position by means of elasticity after the user rotates the front handle 100 to unlock and release the front handle 100. The front return torsion spring is not shown in the attached drawings.

[0034] In this embodiment, the motor 5 is connected to a control circuit board 51, which is electrically connected to a battery and an unlocking control panel 6 located at the front end of the front handlebar 100. The unlocking control panel 6 is used to allow the user to control the operation of the motor 5, thereby driving the motor 5 to control the clutch block 3 to move in conjunction with the clutch shaft 2. Specifically, the front end of the second front housing 105 is provided with a control groove, and the rear groove surface of the control groove is provided with a control through hole communicating with the transmission cavity 101. The unlock control panel 6 includes an unlock housing 61 filled and fastened in the control groove, a fingerprint unlock module 62 and a password input circuit board 63 installed in the unlock housing 61 through an unlock seat 65. The control circuit board 61 is connected to the fingerprint unlock module 62 and the password input circuit board 63 by wires. The password input circuit board 63 integrates multiple password switches. The unlock housing 61 is provided with a fingerprint unlock hole corresponding to the fingerprint unlock module 62 and a password unlock hole corresponding to the password switch. The fingerprint unlock hole is used to allow the user's finger to press on the fingerprint unlock module 62. The pressing end of the password switch is connected to a password button 64 passing through the password unlock hole. The password button 64 is used for the user to press the password switch to input the password.

[0035] In this embodiment, the control circuit board 51 integrates a charging interface 511, and the first front housing 104 is provided with a charging opening corresponding to the charging interface 511, so that the control circuit board 51 can be connected to an external power source to charge the battery.

[0036] In this embodiment, the transmission cavity 101 is provided with a mounting base 108, which is fixedly connected to the first front housing 104 of the front handle 100 by bolt connection. The mounting base 108 is provided with a guide module 109, which is provided with a translation guide groove. The clutch block 3 is guided and engaged with the translation guide groove.

[0037] Furthermore, the guide module 109 includes a guide seat 1091 and a guide cover 1092 that is snapped onto the guide seat 1091. The guide seat 1091 is bolted onto the mounting base 108. The guide seat 1091 has a main guide groove, and the guide cover 1092 has a secondary guide groove. The main guide groove and the secondary guide groove are combined to form the translation guide groove.

[0038] In this embodiment, the output shaft of the motor 5 is provided with a drive gear 501, and one end of the drive shaft 4 is integrally formed with a driven gear 42. The driven gear 42 meshes with the drive gear 501, thereby realizing the transmission connection between the motor 5 and the drive shaft 4.

[0039] In this embodiment, the first front housing 104 of the front handle 100 is provided with a linkage guide groove 1041 for guiding the movement of the clutch pin 2. The linkage guide groove 1041 is provided with a linkage limiting groove 1042. The clutch pin 2 is movably engaged in the linkage guide groove 1041. The clutch pin 2 is provided with a clutch limiting part 21 for moving in the linkage limiting groove 1042. The clutch limiting part 21 is used to limit the translational stroke of the clutch pin 2.

[0040] Furthermore, the clutch insert 2 is connected to an elastic element 7 for keeping it disengaged from the linkage groove 11. The elastic element 7 is a first compression spring. The elastic element 7 is fitted onto the clutch insert 2. One end of the elastic element 7 presses against the groove wall of the linkage limiting groove 1042, and the other end presses against the end of the clutch limiting part 21 near the linkage groove 11. This allows the elastic element 7 to use its elastic force to push the clutch insert 2 to move away from the linkage groove 11, thereby keeping the clutch insert 2 disengaged from the linkage groove 11.

[0041] In this embodiment, the clutch block 3 is provided with a mating groove, a first adapting through hole at one end of the mating groove, and a second adapting through hole at the other end of the mating groove. The mating groove, the first adapting through hole, and the second adapting through hole constitute the driving groove. A second compression spring 8, which is fitted onto the driving shaft 4, is positioned and installed in the mating groove. The second compression spring 8 is non-rotatable. The sliding protrusion 41 passes through the spaces between the coils of the second compression spring 8. The gaps between the coils of the second compression spring 8 constitute the spiral groove. By using the spiral groove formed by the second compression spring 8, when the clutch block 3 is driven into position but the driving shaft 4 is still rotating, the compression deformation of the second compression spring 8 can prevent the clutch block 3 from excessively squeezing other components, reducing the probability of components being squeezed and damaged. In addition, the clutch block 3 is provided with a clutch pushing part for pushing the clutch insert shaft 2 to move towards the linkage groove 11. When the clutch pushing part moves away from the linkage groove 11, the elastic element 7 can drive the clutch insert shaft 2 to move synchronously away from the linkage groove 11 along with the clutch pushing part.

[0042] In this embodiment, a telescopic lock cylinder 9 is also provided in the transmission cavity 101, and an unlocking hole 110 communicating with the transmission cavity 101 is also provided on the outer side of the front handle 100. The unlocking hole 110 corresponds to the keyhole of the telescopic lock cylinder 9, and the push rod head of the telescopic lock cylinder 9 is connected to the clutch block 3. When the motor 5 or the unlocking control panel 6 malfunctions, the user can insert the key into the keyhole of the telescopic lock cylinder 9 from the unlocking hole 110 to manually unlock it. When unlocking, the push rod head of the telescopic lock cylinder 9 retracts and drives the clutch block 3 to move along the first direction, thereby enabling the clutch insertion shaft 2 to be inserted into the linkage groove 11.

[0043] In this embodiment, the front axle sleeve 1 is connected to the rear handle 200 via a transmission rod 300. One end of the rear handle 200 has a rear axle portion, which has a rear transmission hole communicating with the mounting cavity 201. The front axle sleeve 1 has a front transmission hole corresponding to the rear transmission hole. Both ends of the transmission rod 300 are respectively fitted into the rear transmission hole and the front transmission hole and fixed with screws. When the clutch insert 2 is inserted into the linkage groove 11, the front handle 100 and the front axle sleeve 1 can rotate synchronously, thereby allowing the front axle sleeve 1 to work in conjunction with the transmission rod 300 to link the rear handle 200. The outer contour cross-sectional shape of the transmission rod 300, the cross-sectional shape of the rear transmission hole, and the cross-sectional shape of the front transmission hole are all polygonal, preferably square.

[0044] In this embodiment, a battery holder 202 is installed in the mounting cavity 201, and the battery is installed on the battery holder 202. The battery is used to supply power. The transmission rod 300 is provided with a wire hole that connects the mounting cavity 201 and the transmission cavity 101, so as to facilitate the connection of the battery to the control circuit board 51 through the circuit.

[0045] In this embodiment, the rear axle portion of the rear handle 200 is rotatably mounted on the rear mounting base 203. The rear mounting base 203 has a rear mounting through hole, and the front mounting base 106 has a front mounting screw hole corresponding to the rear mounting through hole. During installation, the front mounting base 106 and the rear mounting base 203 are respectively positioned on both sides of the door panel. Then, the threaded portion of the mounting bolt passes through the rear mounting through hole and is threaded into the front mounting screw hole, thereby realizing the installation of the front handle 100 and the rear handle 200.

[0046] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. A transmission structure for an electronic lock, comprising a front handle (100) having an internal transmission cavity (101), the transmission cavity (101) being connected to a front transmission through hole (102) penetrating the outside of the front handle (100), a rotatable front bushing (1) being installed in the front transmission through hole (102), the front bushing (1) being provided with a linkage groove (11), characterized in that: The transmission cavity (101) is slidably installed with a clutch insert (2) for insertion into the linkage groove (11) and a clutch block (3) for enabling the clutch insert (2) to move relative to the linkage groove (11). The clutch insert (2) and the clutch block (3) move in the same direction. The clutch block (3) is provided with a drive groove, and a spiral groove is provided in the drive groove. A drive shaft (4) is inserted through the drive groove. The drive shaft (4) is connected to the output shaft of the motor (5). A sliding protrusion (41) that slides along the spiral direction of the spiral groove is fixed on the outer circumferential surface of the drive shaft (4).

2. The transmission structure of an electronic lock according to claim 1, characterized in that: The motor (5) is connected to a control circuit board (51), which is electrically connected to an unlocking control panel (6) located at the front end of the front handle (100).

3. The transmission structure of an electronic lock according to claim 2, characterized in that: The control circuit board (51) integrates a charging interface (511), and the first front housing (104) of the front handle (100) is provided with a charging opening corresponding to the charging interface (511).

4. The transmission structure of an electronic lock according to claim 1, characterized in that: The transmission cavity (101) is provided with a mounting base (108), the mounting base (108) is provided with a guide module (109), the guide module (109) is provided with a translation guide groove, and the clutch block (3) is guided and engaged with the translation guide groove.

5. The transmission structure of an electronic lock according to claim 1, characterized in that: The output shaft of the motor (5) is provided with a drive gear (501), and one end of the drive shaft (4) is provided with a driven gear (42), which meshes with the drive gear (501).

6. The transmission structure of an electronic lock according to claim 1, characterized in that: The first front housing (104) of the front handle (100) is provided with a linkage guide groove (1041) for guiding the movement of the clutch pin (2). The linkage guide groove (1041) is provided with a linkage limiting groove (1042). The clutch pin (2) is movably fitted in the linkage guide groove (1041). The clutch pin (2) is provided with a clutch limiting part (21) for moving in the linkage limiting groove (1042).

7. The transmission structure of an electronic lock according to claim 6, characterized in that: The clutch insert (2) is connected to an elastic element (7) for keeping it out of the linkage slot (11).

8. The transmission structure of an electronic lock according to claim 7, characterized in that: The elastic element (7) is a first compression spring. The elastic element (7) is fitted on the clutch insert (2). One end of the elastic element (7) presses against the groove wall of the linkage limiting groove (1042), and the other end presses against the end of the clutch limiting part (21) near the linkage groove (11).

9. The transmission structure of an electronic lock according to claim 1, characterized in that: The clutch block (3) is provided with a mating groove, a first adapter through hole at one end of the mating groove and a second adapter through hole at the other end of the mating groove. The mating groove, the first adapter through hole and the second adapter through hole form the driving groove. A second compression spring (8) is positioned and installed in the mating groove and is fitted on the driving shaft (4). The sliding protrusion (41) passes through the coils of the second compression spring (8). The gap between the coils of the second compression spring (8) forms the spiral groove.

10. The transmission structure of an electronic lock according to any one of claims 1-9, characterized in that: The transmission cavity (101) is also provided with a telescopic lock cylinder (9), and the outer side of the front handle (100) is also provided with an unlocking hole (110) that connects to the transmission cavity (101). The unlocking hole (110) corresponds to the key hole of the telescopic lock cylinder (9), and the push rod head of the telescopic lock cylinder (9) is connected to the clutch block (3).

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