Passive motor lock cylinder

Abstract

The utility model relates to a passive motor lock cylinder which aims at solving the technical problems that an existing similar product lacks idling structural design, false locking is prone to being generated, and production, assembly and use are inconvenient due to the fact that the structural design is not good enough. The passive motor lock cylinder is characterized in that a core shaft of the passive motor lock cylinder is positioned, inserted and connected to a circuit board in a lock cylinder assembly, one end of a motor is sleeved and fixed to a clamping sleeve and a clamping base, meanwhile, a motor shaft of the motor extends out of the clamping sleeve and the clamping base and is wedged with a cam groove in the bottom in a transmission base through a special-shaped cam at the position of the motor shaft, and a clamping column of the clamping sleeve is buckled with a clamping groove of the clamping base. The mounting columns on the two sides of the fixing seat are respectively wedged with the column grooves of the clamping seat and are connected into a whole through screws; steel ball holes communicated with the cam groove in the bottom of the transmission seat are symmetrically formed in the two sides of the protruding circular truncated cone at the bottom of the clamping seat, steel balls are arranged in the steel ball holes respectively and abut against the inner wall of the steel ball groove in the top of the transmission seat through unlocking grooves or locking faces of the outer diameters of the two sides of the special-shaped cam, and the inner wall of the steel ball groove in the top of the transmission seat is in arc connection and quincunx shape.

Description

Technical Field

[0001] This utility model relates to a lock cylinder, specifically a passive motor lock cylinder. Background Technology

[0002] Currently, the main component of lock products is the lock cylinder, which is classified into mechanical lock cylinders and electronic lock cylinders based on its working principle. Electronic lock cylinders are further divided into passive electronic locks and active electronic locks based on their power supply structure, with some electronic lock cylinders incorporating motor lock cylinders. Previously, electronic lock cylinders used solenoid valves as the medium for unlocking and locking, but this method has two major fatal weaknesses: firstly, high power consumption, requiring frequent charging of the electronic key; and secondly, poor stability, allowing unlocking and locking to occur without power under strong external magnetic interference. To address this, some lock cylinders adopt a passive structure design, such as application number 20222323635.9 disclosed in Chinese patent literature, authorized on June 6, 2023, with the utility model name "Small Hollow Cup-Shaped Motor Lock Cylinder Mechanism." However, the aforementioned product and similar products lack an integrated steel bolt structure design, and the cam structure of the motor is too simple, especially lacking a free-spinning structure, which easily leads to false locks. Summary of the Invention

[0003] To overcome the aforementioned shortcomings, the purpose of this utility model is to provide a motor lock cylinder that solves the technical problems of existing similar products lacking a free-spinning structure design, easily causing false locks, and having poor structural design leading to inconvenience in production, assembly, and use. This objective is achieved through the following technical solution.

[0004] A passive motor lock cylinder includes a lock cylinder assembly housed within its base. The lock cylinder assembly contains a motor and a circuit board. A drive shaft protrudes from one side of the drive seat plane at one end of the lock cylinder assembly. The drive shaft inserts into the drive hole of a shaped steel bolt within the base. One end of the shaped steel bolt extends out of a bolt hole on the bottom side of the base. A spring is located at the other end of the shaped steel bolt within the base. A spindle is located in a top groove at the other end of the lock cylinder assembly within a keyhole at the top of the base. An electronic key connects to the power circuit board and the motor via the keyhole at the top of the base and the top groove of the lock cylinder assembly, triggering the motor shaft at the motor within the lock cylinder assembly to rotate the drive seat. The drive shaft of the drive seat then causes the shaped steel bolt to extend or retract into the base. The key structural design features a mandrel mounted on a top groove of the lock cylinder assembly's fixing seat via a bushing. The mandrel is positioned and inserted into a circuit board connected within the lock cylinder assembly. Symmetrically protruding mounting posts are provided on both sides of the bottom of the fixing seat. The top opening of the sleeve is equidistantly provided with protruding locking posts. The top opening of the corresponding locking post has symmetrically arranged column grooves and equidistant locking slots. While one end of the motor is fitted and fixed to the sleeve and locking seat, the motor shaft extends out of the sleeve and locking seat and weds into a cam groove at the bottom of the transmission seat via a shaped cam on the motor shaft. The locking posts of the sleeve engage with the locking slots of the locking seat. The mounting posts on both sides of the fixing seat... The slotted wedge of the card seat is connected to the card seat by screws; the bottom of the card seat has symmetrical steel ball holes on both sides of the raised truncated cone, which communicate with the bottom cam groove of the transmission seat. Steel balls are placed in the steel ball holes. When the truncated cone of the card seat is fitted into the transmission seat of the lock cylinder assembly, the steel balls abut against the inner wall of the steel ball groove at the top of the transmission seat. The unlocking groove or locking surface on both sides of the outer diameter of the irregular cam at the motor shaft in the transmission seat abuts against the steel balls. The inner wall of the steel ball groove at the top of the transmission seat is connected in an arc shape to form a plum blossom shape. The outer diameter of the transmission seat is provided with a sealing ring, and the outer diameter of the fixed seat is provided with another sealing ring. The fixed seat is interference-fitted to the retaining ring groove on the inner wall of the base by the retaining ring at the outer diameter ring groove. The aforementioned motor and spindle are connected to the circuit board via wiring. The lock cylinder assembly inside the base has added a card holder and a card sleeve to stabilize the assembly of the motor and the corresponding components. At the same time, when the steel balls on both sides are located on the unlocking surfaces on both sides of the irregular cam, the lock cylinder assembly is in an idle state; when the upper locking surface of the irregular cam pushes out the steel balls on both sides, the steel balls abut into the steel ball groove of the transmission seat, and the lock cylinder assembly drives the transmission seat to rotate.

[0005] The irregularly shaped cam has symmetrically inwardly curved steel ball edges on both sides of its outer diameter. One side of the irregularly shaped cam between the steel ball edges has an arc-shaped opening positioning groove. A fixed end face bracket is provided at the motor shaft, and a protruding positioning post on one side of the bracket's end face inserts into the positioning groove of the irregularly shaped cam, limiting its swing. Steel balls on both sides are embedded in the steel ball edges on both sides of the irregularly shaped cam, or the grooves on both sides of the steel ball edges abut against each other, pushing the steel balls. The outer diameter of the bracket is provided with a flat key surface and a fixing post. The bracket is fixedly installed in the bottom cam groove of the transmission seat via the flat key surface and the fixing post. The steel ball edges are unlocking grooves, and the grooves on both sides of the steel ball edges are locking surfaces.

[0006] The irregularly shaped cam has a deformation groove with an opening on the opposite side of its positioning groove. A torsion spring for resetting the irregularly shaped cam is provided at the deformation groove. The torsion spring is provided as needed, and one end of the torsion spring is fixed to the deformation groove of the irregularly shaped cam.

[0007] The irregularly shaped steel bolt has symmetrically arranged arc-shaped protruding guide edges on both sides. The tongue protrusion at one end of the irregularly shaped steel bolt has an opening in the middle, and the middle protrusion at the other end of the irregularly shaped steel bolt has a column. The transmission hole is located in the middle between the column and the tongue of the irregularly shaped steel bolt. The bottom of the irregularly shaped steel bolt on both sides of the transmission hole has symmetrically arranged protruding square blocks. Springs are symmetrically arranged on both sides of the column at the rear of the guide edge of the irregularly shaped steel bolt. The guide edge of the irregularly shaped steel bolt corresponds to the steel bolt hole of the base, and the square of the irregularly shaped steel bolt corresponds to the guide groove at the bottom of the steel bolt hole in the base.

[0008] The arc-shaped protrusions at the guide edge of the irregular steel bolt arch downwards, with the arches extending above the bottom plane of the irregular steel bolt but below the height of the block.

[0009] The inner side of the ferrule has two symmetrically arranged L-shaped protruding hooks, and one end of the motor inserted into the ferrule is limited to the hooks on both sides of the ferrule.

[0010] The transmission seat has an arc-shaped groove at one end corner of its outer diameter bottom. A limiting block is located inside the base bottom corresponding to the arc-shaped groove. Below the arc-shaped groove, the rectangular transmission hole at the irregularly shaped steel bolt arches outwards inwards to form an arc-shaped edge. While the lock cylinder assembly is housed within the base, the limiting block of the base, located within the arc-shaped groove of the transmission seat, limits the rotation of the transmission seat. Simultaneously, as the transmission seat of the lock cylinder assembly within the base rotates, the transmission shaft of the transmission seat reciprocates within the arc-shaped edge of the transmission hole of the irregularly shaped steel bolt below the rotating transmission seat.

[0011] The outer diameter of the mounting post at the fixed seat of the lock cylinder assembly, which is connected to the card seat and the transmission seat in sequence, is smaller than the outer diameter of the upper fixed seat. The step edge of the mounting post at the outer diameter of the fixed seat is located in the stepped groove that is narrowed inside the base. The snap ring is set in the groove of the outer diameter of the fixed seat above the mounting post.

[0012] The keyhole on one end of the cylindrical outer diameter of the base protrudes into a square block, and the plane of the top groove at the fixing seat of the lock cylinder assembly is lower than the keyhole of the base.

[0013] This utility model has a reasonable structural design, is convenient to use, assemble and install, has low power consumption, good stability, is not prone to false locks, and has a wide range of applications; it is suitable for use as a motor lock cylinder in similar lock products, and for structural improvements of similar products. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the exploded structure of this utility model. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the exploded structure of this utility model. Figure 2 The torsion spring at the deformation groove of the irregular cam is omitted in the figure, as is another sealing ring on the outer diameter of the fixed seat.

[0016] Figure 3 yes Figure 2 A schematic diagram of the bottom structure inside the base.

[0017] Figure 4 yes Figure 2 A magnified structural diagram of the irregularly shaped cam on the motor, omitting the torsion spring at the deformation groove of the irregularly shaped cam in the diagram.

[0018] Figure 5 yes Figure 2 A magnified schematic diagram of the bottom structure of the irregularly shaped steel bolt.

[0019] Figure 6 yes Figure 1 Schematic diagram of the assembled cross-section structure Figure 1 The torsion spring at the deformation groove of the irregular cam is omitted in the figure.

[0020] Figure 7 yes Figure 1 Schematic diagram of the assembled cross-section structure Figure 2 In the figure, the base and the irregular steel bolt are shown as dashed lines, and the torsion spring at the deformation groove of the irregular cam is omitted.

[0021] Figure 8 yes Figure 1 A schematic diagram of the assembled three-dimensional structure.

[0022] Attached Figure Numbers and Names: 1. Lock Cylinder Assembly; 2. Base; 201. Guide Groove; 202. Limiting Block; 3. Spring; 4. Irregularly Shaped Steel Bolt; 401. Guide Edge; 402. Tongue; 403. Column; 404. Square Block; 5. Spindle; 6. Bushing; 7. Fixing Seat; 701. Mounting Column; 8. Snap Ring; 9. Circuit Board; 10. Motor; 11. Fixing Frame; 1101. Positioning Column; 1102. 1103. Flat key surface; 12. Fixed column; 13. Irregular cam; 14. Steel ball edge; 15. Positioning groove; 16. Deformation groove; 17. Sleeve; 18. Snap pin; 19. Hook pin; 20. Snap pin seat; 21. Column groove; 22. Snap groove; 33. Frustum; 44. Steel ball; 55. Transmission seat; 66. Transmission shaft; 77. Arc groove; 88. Sealing ring. Implementation

[0023] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-8As shown, the base 2 of the passive motor lock cylinder is equipped with a lock cylinder assembly 1, which contains a motor 10 and a circuit board 9. A transmission shaft 1601 protrudes from one side of the plane of the transmission seat 16 at one end of the lock cylinder assembly. The transmission shaft of the transmission seat is inserted into the transmission hole of the irregular steel bolt 4 in the base. One end of the irregular steel bolt extends out of the bolt hole on the bottom side of the base. A spring 3 is provided at the other end of the irregular steel bolt in the base. A spindle 5 is provided in the top groove of the lock cylinder assembly at the other end of the key hole at the top of the base. The electronic key connects the power supply circuit board and the motor through the key hole at the top of the base and the top groove of the lock cylinder assembly, triggering the motor shaft at the motor in the lock cylinder assembly to drive the transmission seat to rotate. The transmission shaft of the transmission seat drives the irregular steel bolt to extend or retract into the base. Its specific structure is as follows: The aforementioned spindle is set in the top groove of the fixing seat 7 of the lock cylinder assembly through the bushing 6. The spindle is positioned and inserted into the circuit board connected to the lock cylinder assembly. The bottom of the fixing seat has symmetrically provided protruding mounting posts 701 on both sides. The top opening of the sleeve 13 has equidistantly provided protruding locking posts 1301. The top opening of the corresponding locking post 14 has symmetrically provided column grooves 1401 and equidistantly provided locking grooves 1402. When one end of the motor is fitted and fixed to the sleeve and locking post, the motor shaft of the motor extends out of the sleeve and locking post and is wedged into the cam groove at the bottom of the transmission seat through the irregular cam 12 at the motor shaft. The locking post of the sleeve and the locking groove of the locking post are engaged. The mounting posts on both sides are connected to the column slot wedges of the card seat by screws; the bottom of the card seat has a raised truncated cone 1403 with symmetrical steel ball holes on both sides that communicate with the bottom cam groove of the transmission seat. Steel balls 15 are respectively installed in the steel ball holes. When the cone of the card seat is fitted into the transmission seat of the lock core assembly, the steel balls abut against the inner wall of the steel ball groove at the top of the transmission seat. The unlocking groove or locking surface of the outer diameter of the irregular cam on both sides of the motor shaft in the transmission seat abuts against the steel balls. The inner wall of the steel ball groove at the top of the transmission seat is connected in an arc shape to form a plum blossom shape. The outer diameter of the transmission seat is provided with a sealing ring 17, and the outer diameter of the fixed seat is provided with another sealing ring. The fixed seat is interference-fixed to the retaining ring groove on the inner wall of the base by the retaining ring 8 at the outer diameter ring groove.

[0024] The aforementioned irregularly shaped cam has symmetrically arranged inwardly curved steel ball edges 1201 on both sides of its outer diameter. One side of the irregularly shaped cam between the steel ball edges has an arc-shaped opening positioning groove 1202 on its outer diameter. A fixed end face bracket 11 is provided at the motor shaft, and a protruding positioning post 1101 on one side of the fixed end face inserts into the positioning groove of the irregularly shaped cam, limiting the cam's swing. Steel balls on both sides are embedded in the steel ball edges on both sides of the irregularly shaped cam, or the grooves on both sides of the steel ball edges abut against each other, pushing the steel balls. The outer diameter of the fixed bracket has a flat key surface 1102 and a fixing post 1103, respectively. The fixed bracket is fixedly installed in the bottom cam groove inside the transmission seat via the flat key surface and the fixing post. The steel ball edges are unlocking grooves, and the grooves on both sides of the steel ball edges are locking surfaces. A deformation groove 1203 with an opening is provided on the symmetrical other side of the positioning groove of the irregularly shaped cam, and a torsion spring for resetting the irregularly shaped cam is provided at the deformation groove.

[0025] The aforementioned irregularly shaped steel bolt has symmetrically arranged arc-shaped protruding guide edges 401 on both sides. One end of the irregularly shaped steel bolt (tongue 402) has an opening in the middle, and the other end has a centrally protruding column 403. A transmission hole is located between the column and the tongue of the irregularly shaped steel bolt. Symmetrically arranged at the bottom of the irregularly shaped steel bolt on both sides of the transmission hole are protruding square blocks 404. Springs are symmetrically arranged on both sides of the column at the rear of the guide edges of the irregularly shaped steel bolt. The guide edges of the irregularly shaped steel bolt correspond to the bolt holes in the base, and the square blocks correspond to the guide grooves 201 at the bottom of the bolt holes in the base. The arc-shaped protrusions at the guide edges of the irregularly shaped steel bolt arch downwards, with the arches exceeding the bottom plane of the irregularly shaped steel bolt but lower than the height of the square blocks.

[0026] The aforementioned ferrule has two symmetrically arranged, L-shaped protruding hook posts 1302 on its inner side. One end of the motor inserted into the ferrule is limited by the hook posts on both sides of the ferrule. The bottom corner of the outer diameter of the transmission base has an arc-shaped groove 1602. The bottom side of the base corresponding to the arc-shaped groove has a limiting block 202. The rectangular transmission hole at the irregular steel bolt below the arc-shaped groove arches outward inward to form an arc-shaped edge. While the lock cylinder assembly is set in the base, the limiting block of the base is located in the arc-shaped groove of the transmission base to limit the rotation of the transmission base.

[0027] The outer diameter of the mounting post at the fixing seat of the aforementioned lock cylinder assembly, which is connected to the card seat and the transmission seat in sequence below, is smaller than the outer diameter of the upper fixing seat. The stepped edge of the mounting post at the outer diameter of the fixing seat is located in a stepped groove that narrows within the base. The retaining spring is set in the groove on the outer diameter of the fixing seat above the mounting post. One end of the keyhole on the cylindrical circumference of the base's outer diameter protrudes into a square block. The plane at the top groove of the fixing seat of the lock cylinder assembly is recessed and lower than the keyhole of the base.

[0028] In use, the electronic key is inserted into the keyhole of the base and into the groove at the top of the fixing seat of the lock cylinder assembly. The motor and circuit board are powered on, and the motor starts working, driving the irregularly shaped cam to rotate. The irregularly shaped cam pushes out the steel balls on both sides and pushes them into the steel ball grooves on the inner wall of the transmission seat. At this time, turning the electronic key will drive the irregularly shaped steel bolt into the base to unlock the lock. When the electronic key is removed, the motor is powered off, and the motor drives the irregularly shaped cam to reset. The irregularly shaped steel bolt is reset by the spring, and the irregularly shaped steel bolt drives the transmission seat to reset. The steel balls are wedged into the steel ball edges on both sides of the irregularly shaped cam, and the lock cylinder assembly is in an idle state.

[0029] In summary, this passive motor lock cylinder is a passive lock cylinder that triggers the motor to run by inserting an electronic key. It achieves both locking and unlocking functions with virtually no load, making it a low-power lock cylinder. When the motor stops rotating due to power failure or the electronic key is incompatible, the lock cylinder assembly remains in an idle state, preventing false locking and accidental damage. Regardless of the position of the steel ball on the irregularly shaped cam, the spring can reset the irregularly shaped bolt to its initial position.

Claims

1. A passive motor lock cylinder, the base (2) is provided with a lock cylinder assembly (1), the lock cylinder assembly is provided with a motor (10) and a circuit board (9), the transmission seat (16) of one end of the lock cylinder assembly is provided with a transmission shaft (1601) on one side of the plane, the transmission shaft of the transmission seat is inserted into the transmission hole of the special-shaped steel bolt (4) in the base, one end of the special-shaped steel bolt extends out of the steel bolt hole on one side of the bottom of the base, the other end of the special-shaped steel bolt in the base is provided with a spring (3), the top recess of the other end of the lock cylinder assembly in the key hole on the top of the base is provided with a spindle (5); the electronic key is connected with the spindle through the key hole on the top of the base and the top recess of the lock cylinder assembly to supply power to the circuit board and the motor, the motor shaft at the motor in the lock cylinder assembly is driven to rotate the transmission seat, the transmission shaft of the transmission seat drives the special-shaped steel bolt to extend out or be retracted into the base; characterized in that The core shaft (5) is arranged at the top groove of the fixed seat (7) of the lock cylinder assembly (1) through the shaft sleeve (6), the core shaft positioning insert is connected to the circuit board (9) in the lock cylinder assembly, the two sides of the bottom of the fixed seat are symmetrically provided with the protruding mounting column (701), the outer diameter of the top sleeve opening of the clamping sleeve (13) is provided with the protruding clamping column (1301) at equal intervals, the top seat opening of the clamping seat (14) corresponding to the clamping column is provided with the symmetrically arranged column groove (1401) and the equidistantly arranged clamping groove (1402), one end of the motor (10) is sleeved into the clamping sleeve and the clamping seat, the motor shaft of the motor extends out of the clamping sleeve and the clamping seat and is wedged with the cam groove in the bottom of the transmission seat (16) through the special-shaped cam (12) at the motor shaft, the clamping column of the clamping sleeve is buckled with the clamping groove of the clamping seat, the mounting columns on the two sides of the fixed seat are respectively wedged with the column grooves of the clamping seat and are integrated through screws; the bottom of the clamping seat is symmetrically provided with the steel ball hole communicated with the cam groove in the bottom of the transmission seat, the steel ball hole is respectively provided with the steel ball (15), the round table (1403) of the clamping seat is sleeved into the transmission seat of the lock cylinder assembly, meanwhile, the steel ball is abutted with the inner wall of the steel ball groove at the top of the transmission seat, the unlocking groove or the locking surface of the special-shaped cam at the motor shaft in the transmission seat is abutted with the steel ball, the inner wall of the steel ball groove at the top of the transmission seat is arc-shaped and connected to form a plum blossom shape, the outer diameter of the transmission seat is provided with a sealing ring (17), the outer diameter of the fixed seat is provided with another sealing ring, the fixed seat is fixed in the clamping spring groove of the inner wall of the base through the clamping spring (8) at the outer diameter ring groove.

2. The passive motorized lock core of claim 1, wherein The outer diameter of the special-shaped cam (12) is symmetrically provided with the inwardly curved steel ball edge (1201) on the two sides, the outer diameter of the special-shaped cam on one side between the steel ball edges is provided with the arc-shaped opening positioning groove (1202), the end face fixing frame (11) fixed to the motor (10) is arranged at the motor shaft, the protruding positioning column (1101) on one side of the end face of the fixing frame is inserted into the positioning groove of the special-shaped cam to limit the swing of the positioning groove of the special-shaped cam, the two steel balls (15) are embedded in the steel ball edges on the two sides of the special-shaped cam or the grooves on the two sides of the steel ball edges to abut and push the steel balls, the outer diameter of the fixing frame is respectively provided with the flat key surface (1102) and the fixing column (1103), the fixing frame is fixedly arranged in the cam groove in the bottom of the transmission seat (16) through the flat key surface and the fixing column; the steel ball edge is an unlocking groove, and the groove on the two sides of the steel ball edge is a locking surface.

3. The passive motorized lock core of claim 2, wherein The positioning groove (1202) of the special-shaped cam (12) is symmetrically provided with the open deformation groove (1203) on the other side edge, and the torsional spring for resetting the special-shaped cam is arranged at the deformation groove.

4. The passive motorized lock core of claim 1, wherein The two sides of the special-shaped steel bolt (4) are symmetrically provided with the arc-shaped protruding guide edge (401), the protruding middle of the tongue (402) at one end of the special-shaped steel bolt is provided with an opening, the middle protrusion of the special-shaped steel bolt at the other end is provided with the column part (403), the transmission hole is arranged between the column part and the tongue of the special-shaped steel bolt, and the bottom of the special-shaped steel bolt on the two sides of the transmission hole is respectively symmetrically provided with the protruding square block (404); the springs (3) are symmetrically arranged on the two sides of the column part at the rear of the guide edge of the special-shaped steel bolt, the guide edge of the special-shaped steel bolt corresponds to the steel bolt hole of the base, and the square block of the special-shaped steel bolt corresponds to the guide groove (201) at the bottom of the steel bolt hole in the base.

5. The passive motorized lock core of claim 4, wherein The arc-shaped protrusions on the guide edges (401) of the special-shaped steel bolt (4) are respectively arched downward, and the arching height is higher than the bottom plane of the special-shaped steel bolt and lower than the height of the square block (404).

6. The passive motorized lock core of claim 1, wherein The inner side of the clamping column (1301) of the clamping sleeve (13) is provided with two symmetrically arranged L-shaped protruding hook columns (1302), and one end of the motor (10) inserted into the clamping sleeve is limited by the two hook columns on the two sides of the clamping sleeve.

7. The passive motorized lock core of claim 1, wherein The outer diameter bottom side end corner of the transmission seat (16) is provided with an arc-shaped groove (1602), the corresponding base (2) is provided with a limiting block (202) inside the bottom side inside, the arc-shaped side of the arc-shaped groove on one side is arched outward from the inner diameter of the rectangular transmission hole on one side of the special-shaped steel bolt (4) at the bottom; when the lock cylinder assembly (1) is arranged in the base, the limiting block of the base is located in the arc-shaped groove of the transmission seat to limit the rotation of the transmission seat.

8. The passive motorized lock core of claim 1, wherein The outer diameter of the clamping seat (14) and the transmission seat (16) connected in sequence below the mounting column (701) of the fixed seat (7) of the lock cylinder assembly (1) is smaller than the outer diameter of the upper fixed seat, the step edge of the mounting column of the outer diameter of the fixed seat is limited in the step groove reduced in the base, and the clamping spring (8) is arranged in the circle groove of the outer diameter of the fixed seat above the mounting column.

9. The passive motorized lock core of claim 1, wherein The outer diameter of the keyhole on one end of the cylindrical surface of the base (2) is protruded in a square block, and the plane of the top recess of the fixed seat (7) of the lock cylinder assembly (1) is sunken lower than the keyhole of the base.

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