A universal fingerprint lock body

Abstract

A universal fingerprint lock body relates to a lock body, which is composed of a universal part and a lock body connecting part A. The universal part includes a lock cover, a lock body, and a circuit board, a battery and a motor fixing plate arranged in the lock cover and connected in sequence. The lock body is fixedly connected to the lock cover, and extended arc-shaped ear plates are provided on both sides of the rear part of the circuit board fixing plate, and a recessed surface is opened on the front part of the arc-shaped ear plate. Screw holes are provided at the bottom of the recessed surface. The circuit board and the battery are clamped between the arc-shaped ear plates on both sides, and a motor is fixed behind the motor fixing plate. The lock body is sleeved on the outside of the motor, and the motor fixing plate is fixedly connected to the lock body by a countersunk screw A. The present invention facilitates unified production by arranging universal parts to match different lock plates or lock cores, and can effectively reduce the difficulty and cost of production, and has good universality.

Description

Technical Field

[0001] The present invention relates to a lock body, in particular to a universal fingerprint lock body. Background Art

[0002] Fingerprint locks are well-known smart locks, and fingerprint authentication is convenient, fast, and accurate. With the popularization of technology and the development of smart homes, more and more people are beginning to choose fingerprint locks. However, existing fingerprint locks have a corresponding lock core for each lock body, which cannot achieve universality and is difficult to manufacture, making it difficult to produce uniformly. Summary of the Invention

[0003] In order to overcome the deficiencies in the background technology, the present invention discloses a universal fingerprint lock body.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] A universal fingerprint lock body, consisting of universal components and a lock body connector A. The universal components include a lock cover, a lock body, and a circuit board, a battery, and a motor fixing plate arranged in sequence inside the lock cover. The lock body is fixedly connected to the lock cover. Extended arc-shaped ear plates are provided on both sides of the rear portion of the circuit board fixing plate. A recessed surface is provided on the front portion of the arc-shaped ear plates. Screw holes are provided at the bottom of the recessed surface. The circuit board and battery are clamped between the two arc-shaped ear plates. A motor is fixed to the rear of the motor fixing plate. The lock body is sleeved on the outside of the motor. The motor fixing plate is fixed to the lock body via countersunk screws A.

[0006] The lock body connector A includes a base and a locking plate A. The base is mounted on the outside of the lock body through a rubber gasket. The base is cylindrical and has an external thread on the outer surface. Both sides of the base are milled with flat surfaces and are fixedly connected to the lock body through a spring and a positioning pin in the through hole at the rear of the outer surface. A nut is fitted on the external thread of the base, and an oblong locking plate A is fitted on the arc-shaped extension piece at the rear of the base. The locking plate A is fixed to the screw hole at the rear end of the lock body by screws.

[0007] A universal fingerprint lock body, consisting of universal components and a lock body connector B. The universal components include a lock cover, a lock body, and a circuit board, a battery, and a motor fixing plate arranged in sequence inside the lock cover. The lock body is fixedly connected to the lock cover. Extended arc-shaped ear plates are provided on both sides of the rear portion of the circuit board fixing plate. A recessed surface is provided on the front portion of the arc-shaped ear plates. Screw holes are provided at the bottom of the recessed surface. The circuit board and battery are clamped between the two arc-shaped ear plates. A motor is fixed to the rear of the motor fixing plate. The lock body is sleeved on the outside of the motor. The motor fixing plate is fixed to the lock body via countersunk screws A.

[0008] The lock body connector B includes a base and a locking piece B. The base is mounted on the outside of the lock body through a rubber gasket. The base is cylindrical and has an external thread on the outer surface. Both sides of the base are milled with flat surfaces and are fixedly connected to the lock body through a spring and a positioning pin in the through hole at the rear of the outer surface. A nut is fitted on the external thread of the base, and a horizontally placed "L"-shaped locking piece B is fitted on the arc-shaped extension piece at the rear of the base. The locking piece B is fixed to the screw hole at the rear end of the lock body by screws.

[0009] A universal fingerprint lock body, consisting of universal components and a lock body connector C. The universal components include a lock cover, a lock body, and a circuit board, a battery, and a motor fixing plate arranged in sequence inside the lock cover. The lock body is fixedly connected to the lock cover. Extended arc-shaped ear plates are provided on both sides of the rear portion of the circuit board fixing plate. A recessed surface is provided on the front portion of the arc-shaped ear plates. Screw holes are provided at the bottom of the recessed surface. The circuit board and battery are clamped between the two arc-shaped ear plates. A motor is fixed to the rear of the motor fixing plate. The lock body is sleeved on the outside of the motor. The motor fixing plate is fixed to the lock body via countersunk screws A.

[0010] The lock body connecting part C includes a lock core and a back seat. The lock core is fixed to the rear of the lock body by a rubber washer and a countersunk screw C. The back seat consists of a cylindrical section on one side and a square seat extending from the rear. The rear of the lock body and the lock core are sleeved in the cylindrical section of the back seat and locked by a spring and a locating pin. A U-shaped lock plate C is fixed on the connecting surface between the cylindrical section and the square seat. A cavity for placing the lock plate D is provided in the square seat. The protrusion on the lock core cooperates with the "U"-shaped concave surface on the lock plate D.

[0011] The universal fingerprint lock body is provided with convex columns on both sides of the interior of the lock cover, and the convex columns are arranged in the concave surfaces of the arc-shaped ear plates on both sides of the circuit board fixing plate.

[0012] The universal fingerprint lock body has "U"-shaped steps on both sides of the motor fixing plate, each with screw holes, and an arc-shaped groove on the outer side of the step. Three insertion holes are spaced between the two "U"-shaped steps, and an extension piece is provided on the upper and lower parts of the middle insertion hole. The opposing surfaces of the two extension pieces are both flat, and the outer sides are arc-shaped. Flat surfaces are milled on the upper and lower surfaces of the front of the motor, and the flat surfaces on the motor are respectively matched with the two extension pieces.

[0013] The lock body includes a flange at the front and a cylindrical section at the rear. The two extension pieces of the motor fixing plate are matched with the plane of the motor and then sleeved in the cylindrical section. "L"-shaped connecting seats are fixed on both sides of the front of the lock body flange. The transverse sections of the "L"-shaped connecting seat are respectively arranged in the "U"-shaped steps on both sides of the motor fixing plate. The screw holes on the transverse sections of the "L"-shaped connecting seat are respectively arranged corresponding to the screw holes on the step surface of the "U"-shaped step, and are fixedly connected by countersunk screws A; the vertical sections of the "L"-shaped connecting seat pass through the arc-shaped grooves on the outer side surface of the step and are respectively arranged corresponding to the screw holes at the bottom of the concave surface of the arc-shaped ear plate, and are fixedly connected by countersunk screws B.

[0014] The universal fingerprint lock body is provided with a through hole in the middle of the circuit board fixing plate, and three recessed grooves are provided outside the through hole along its circumferential direction. A convex circle is provided on the inner surface of the circuit board to match the through hole of the circuit board fixing plate, and three protrusions are provided outside the convex circle along its circumferential direction and are respectively arranged in the three recessed grooves.

[0015] The universal fingerprint lock body has an arc-shaped notch on the outer circular surface of the lower part of the lock piece A, which matches the arc-shaped extension piece on the rear part of the base. The lower surface of the lock piece A is provided with a through hole for passing the screw.

[0016] The universal fingerprint lock body, the lock piece B includes a rotating piece and a long handle. The rotating piece is pear-shaped with one end larger than the other and is arranged in the arc-shaped extension piece at the rear of the base. A through hole for passing the screw is provided in the middle of the rotating piece, and the long handle is fixedly connected to the small end face of the rotating piece.

[0017] The universal fingerprint lock body has connecting holes at the four corners of the back seat, which are respectively arranged corresponding to the through holes at the four corners of the lock plate C and fixed by screws.

[0018] The universal fingerprint lock body has a notch on the outer circumferential surface of the positioning pin, the eccentric shaft at the rear of the motor is clamped in the notch, and the spring is sleeved on the convex column at the lower part of the positioning pin.

[0019] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0020] The universal fingerprint lock body of the present invention facilitates unified production by providing universal parts to match different lock plates or lock cores, can effectively reduce manufacturing difficulty and cost, and has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the rear structure of Example 1 of the present invention.

[0022] Figure 2 It is a schematic side structural diagram of Example 1 of the present invention.

[0023] Figure 3 yes Figure 2 Exploded diagram.

[0024] Figure 4 It is a schematic diagram of the side structure of Example 2 of the present invention.

[0025] Figure 5 It is a schematic diagram of the rear structure of Example 2 of the present invention.

[0026] Figure 6 yes Figure 4 Exploded diagram.

[0027] Figure 7 It is a schematic diagram of the rear structure of Example 3 of the present invention.

[0028] Figure 8 It is a schematic diagram of the side structure of Example 3 of the present invention.

[0029] Figure 9 yes Figure 8 Exploded diagram.

[0030] In the figure: 1. Lock cover; 2. Circuit board fixing plate; 3. Circuit board; 4. Battery; 5. Countersunk screw; 6. Motor fixing plate; 7. Motor; 8. Lock body; 9. Rubber gasket; 10. Boss; 11. Recessed surface; 12. Screw hole; 13. Arc ear plate; 14. Groove; 15. Extension plate; 16. Flat surface; 17. Vertical section; 18. Screw hole; 19. Spring; 20. Locating pin; 21. Base; 22. Countersunk screw B; 23. Nut; 24. Lock plate A; 25. Screw; 26. Lock plate B; 27. Protrusion; 28. Countersunk screw D; 29. ​​Lock cylinder; 30. Back seat; 31. Lock plate C; 32. Lock plate D. DETAILED DESCRIPTION

[0031] The present invention can be explained in detail by the following examples, the purpose of which is to disclose the present invention and to protect all technical improvements within the scope of the present invention.

[0032] Combined with attachment Figure 1-3 The universal fingerprint lock body is composed of universal parts and lock body connector A. The universal parts include a lock cover 1, a lock body 8, and a circuit board 3, a battery 4, and a motor fixing plate 2 arranged in sequence in the lock cover 1. The lock body 8 is fixedly connected to the lock cover 1. Extended arc-shaped ear plates 13 are provided on both sides of the rear part of the circuit board fixing plate 2. A recessed surface 11 is provided on the front part of the arc-shaped ear plate 13. A screw hole 12 is provided at the bottom of the recessed surface 11. The circuit board 3 and the battery 4 are clamped between the arc-shaped ear plates 13 on both sides. A motor 7 is fixed on the back of the motor fixing plate 2. The lock body 8 is sleeved on the outside of the motor 7. The motor fixing plate 6 is fixedly connected to the lock body 8 by a countersunk screw A5.

[0033] The lock body connector A includes a base 21 and a locking piece A24. The base 21 is sleeved on the outside of the lock body 8 through a rubber gasket 9. The base 21 is cylindrical and has an external thread on the outer surface. Both sides of the base 21 are milled with flat surfaces and are fixedly connected to the lock body 8 through a spring 19 and a positioning pin 20 in the through hole at the rear of the outer surface. A nut 23 is fitted on the external thread of the base 21, and an oblong locking piece A24 is fitted on the arc-shaped extension piece at the rear of the base 21. The locking piece A24 is fixed to the screw hole 18 at the rear end of the lock body 8 by a screw 25.

[0034] Combined with attachment Figure 4-6 The universal fingerprint lock body is composed of universal parts and a lock body connector B. The universal parts include a lock cover 1, a lock body 8, and a circuit board 3, a battery 4, and a motor fixing plate 2 arranged in sequence inside the lock cover 1. The lock body 8 is fixedly connected to the lock cover 1. Extended arc-shaped ear plates 13 are provided on both sides of the rear part of the circuit board fixing plate 2. A recessed surface 11 is provided on the front part of the arc-shaped ear plates 13. A screw hole 12 is provided at the bottom of the recessed surface 11. The circuit board 3 and the battery 4 are clamped between the arc-shaped ear plates 13 on both sides. A motor 7 is fixed to the back of the motor fixing plate 2. The lock body 8 is sleeved on the outside of the motor 7. The motor fixing plate 6 is fixed to the lock body 8 by a countersunk screw A5.

[0035] The lock body connector B includes a base 21 and a locking piece B26. The base 21 is sleeved on the outside of the lock body 8 through a rubber gasket 9. The base 21 is cylindrical and has an external thread on the outer surface. Both sides of the base 21 are milled with flat surfaces and are fixedly connected to the lock body 8 through a spring 19 and a positioning pin 20 in the through hole at the rear of the outer surface. A nut 23 is fitted on the external thread of the base 21, and a horizontally placed "L"-shaped locking piece B26 is fitted on the arc-shaped extension piece at the rear of the base 21. The locking piece B26 is fixed to the screw hole at the rear end of the lock body 4 through a screw 13.

[0036] Combined with attachment Figure 7-9 The universal fingerprint lock body shown is composed of universal parts and lock body connector C. The universal parts include a lock cover 1, a lock body 8, and a circuit board 3, a battery 4, and a motor fixing plate 2 arranged in sequence inside the lock cover 1. The lock body 8 is fixedly connected to the lock cover 1. Extended arc-shaped ear plates 13 are provided on both sides of the rear part of the circuit board fixing plate 2. A recessed surface 11 is provided on the front part of the arc-shaped ear plates 13. Screw holes 12 are provided at the bottom of the recessed surface 11. The circuit board 3 and the battery 4 are clamped between the arc-shaped ear plates 13 on both sides. A motor 7 is fixed to the back of the motor fixing plate 2. The lock body 8 is sleeved on the outside of the motor 7. The motor fixing plate 6 is fixed to the lock body 8 by countersunk screws A5.

[0037] The lock body connector C includes a lock core 29 and a rear seat 30. The lock core 29 is fixed to the rear of the lock body 8 by a rubber washer 9 and a countersunk screw C28. The rear seat 30 consists of a cylindrical section on one side and a square seat extending from the rear. The rear of the lock body 8 and the lock core 29 are sleeved in the cylindrical section of the rear seat 30 and locked by a spring 19 and a locating pin 20. A U-shaped lock plate C31 is fixed on the connecting surface between the cylindrical section and the square seat. A cavity for placing the lock plate D32 is provided in the square seat. The protrusion 27 on the lock core 29 cooperates with the "U"-shaped concave surface on the lock plate D32.

[0038] The universal fingerprint lock body is provided with protruding columns 10 on both sides of the interior of the lock cover 1 . The protruding columns 10 are arranged in the recessed surfaces 11 of the arc-shaped ear plates 13 on both sides of the circuit board fixing plate 2 .

[0039] The universal fingerprint lock body has "U"-shaped steps on both sides of the motor fixing plate 6, each of which has screw holes on the step surface, and an arc-shaped groove 14 on the outer side of the step. Three insertion holes are spaced between the two "U"-shaped steps, and an extension piece 15 is provided on the upper and lower parts of the middle insertion hole. The opposing surfaces of the two extension pieces 15 are both flat, and the outer surfaces are set as arc surfaces. Flat surfaces 16 are milled on the upper and lower surfaces of the front of the motor 7, and the flat surfaces 16 on the motor 7 are respectively matched with the two extension pieces 15.

[0040] The lock body 8 includes a flange at the front and a cylindrical section at the rear. The two extension pieces 15 of the motor fixing plate 6 are fitted with the flat surface 16 of the motor 7 and are sleeved in the cylindrical section. "L"-shaped connecting seats are fixed on both sides of the front of the flange of the lock body 8. The transverse sections of the "L"-shaped connecting seat are respectively arranged in the "U"-shaped steps on both sides of the motor fixing plate 6. The screw holes on the transverse sections of the "L"-shaped connecting seat are arranged corresponding to the screw holes on the step surface of the "U"-shaped step, and are fixedly connected by countersunk screws A5; the vertical sections of the "L"-shaped connecting seat pass through the arc-shaped grooves 14 on the outer side surface of the step and are arranged corresponding to the screw holes 12 at the bottom of the recessed surface 11 of the arc-shaped ear plate 13, and are fixedly connected by countersunk screws B22.

[0041] The universal fingerprint lock body is provided with a through hole in the middle of the circuit board fixing plate 2, and three recessed grooves are provided outside the through hole along its circumferential direction. A convex circle is provided on the inner surface of the circuit board to match the through hole of the circuit board fixing plate 2, and three protrusions are provided outside the convex circle along its circumferential direction and are respectively arranged in the three recessed grooves.

[0042] The universal fingerprint lock body has an arc-shaped notch on the outer circular surface of the lower part of the lock piece A24, which matches the arc-shaped extension piece on the rear part of the base 21. The lower surface of the lock piece A24 is provided with a through hole for passing the screw 25.

[0043] The universal fingerprint lock body, the lock piece B26 includes a rotating piece and a long handle. The rotating piece is pear-shaped with one end larger than the other end and is arranged in the arc-shaped extension piece at the rear of the base 21. A through hole is provided in the middle of the rotating piece for passing the screw 25, and the long handle is fixedly connected to the small end face of the rotating piece.

[0044] The universal fingerprint lock body has connecting holes at the four corners of the rear seat 30, which are respectively arranged corresponding to the through holes at the four corners of the lock plate C31 and fixed by screws.

[0045] The universal fingerprint lock body has a notch on the outer circumferential surface of the positioning pin 20, the eccentric shaft at the rear of the motor 7 is clamped in the notch, and the spring 19 is sleeved on the convex column at the lower part of the positioning pin 20.

[0046] The universal fingerprint lock body of the present invention is implemented as shown in the attached Figure 1-3 As shown, when in use, the lock is unlocked by identifying the fingerprint collected and stored in advance. After the fingerprint is successfully identified, the motor 7 is started by controlling the circuit board 3. The rotation of the eccentric shaft at the rear of the motor 7 drives the positioning pin 20 to be pulled out, and the lock piece A24 on the rotary lock body 8 is rotated 90 degrees to complete the unlocking.

[0047] The universal fingerprint lock body of the present invention is implemented as shown in the attached Figure 4-6 As shown, when in use, the lock is unlocked by identifying the fingerprint collected and stored in advance. After the fingerprint is successfully identified, the motor 7 is started by controlling the circuit board 3. The rotation of the eccentric shaft at the rear of the motor 7 drives the positioning pin 20 to be pulled out, and the lock piece B26 on the rotary lock body 8 is rotated 180 degrees to complete the unlocking.

[0048] The universal fingerprint lock body of the present invention is implemented as shown in the attached Figure 7-9 As shown, when in use, the lock is unlocked by identifying the fingerprint collected and stored in advance. After the fingerprint is successfully identified, the motor 7 is started by controlling the circuit board 3. The rotation of the eccentric shaft at the rear of the motor 7 drives the positioning pin 20 to be pulled out. While rotating the rear seat 30 to an angle of 90 degrees, the protrusion 27 on the rear of the lock cylinder 29 drives the lock piece D32 in the rear seat 30 to rotate, completing the unlocking.

[0049] The parts not described in detail in this invention are prior art.

[0050] The embodiments selected herein for the purpose of disclosing the invention are presently considered suitable, but it should be understood that the invention is intended to include all variations and modifications of the embodiments that fall within the scope of the concept and invention.

Claims

1. A universal fingerprint lock body, consisting of universal parts and a lock body connector A, characterized by: The universal parts include a lock cover, a lock body, and a circuit board, a battery, and a motor fixing plate that are sequentially connected and arranged inside the lock cover. The lock body is fixedly connected to the lock cover. Extended arc-shaped ear plates are provided on both sides of the rear part of the circuit board fixing plate. A recessed surface is provided on the front part of the arc-shaped ear plates. Screw holes are provided at the bottom of the recessed surface. The circuit board and battery are clamped between the arc-shaped ear plates on both sides. A motor is fixed behind the motor fixing plate. The lock body is sleeved on the outside of the motor. The motor fixing plate is fixed to the lock body by countersunk screws A. The lock body connector A includes a base and a locking plate A. The base is mounted on the outside of the lock body through a rubber gasket. The base is cylindrical and has an external thread on the outer surface. Both sides of the base are milled with flat surfaces and are fixedly connected to the lock body through a spring and a positioning pin in the through hole at the rear of the outer surface. A nut is fitted on the external thread of the base, and an oblong locking plate A is fitted on the arc-shaped extension piece at the rear of the base. The locking plate A is fixed to the screw hole at the rear end of the lock body by screws.

2. The universal fingerprint lock body according to claim 1, characterized in that: An arc-shaped notch is provided on the outer circular surface of the lower part of the locking piece A, and the arc-shaped notch matches the arc-shaped extension piece on the rear part of the base. A through hole is provided on the lower surface of the locking piece A for passing the screw.

3. A universal fingerprint lock body, consisting of universal parts and a lock body connector B, characterized by: The general parts include a lock cover, a lock body, and a circuit board, a battery and a motor fixing plate which are connected in sequence inside the lock cover. The lock body is fixedly connected to the lock cover. Extended arc-shaped ear plates are provided on both sides of the rear of the circuit board fixing plate. A recessed surface is provided on the front of the arc-shaped ear plate. Screw holes are provided at the bottom of the recessed surface. The circuit board and the battery are clamped between the arc-shaped ear plates on both sides. The motor is fixed behind the motor fixing plate. The lock body is sleeved on the outside of the motor, and the motor fixing plate is fixed to the lock body by a countersunk screw A; the lock body connecting part B includes a base and a locking plate B. The base is sleeved on the outside of the lock body through a rubber washer. The base is cylindrical and has an external thread on the outer circumferential surface. Flat surfaces are milled on both sides of the base and it is fixed to the lock body through a spring and a locating pin in the through hole at the rear of the outer circumferential surface. A nut is matched on the external thread of the base, and a horizontally placed "L"-shaped locking plate B is matched on the arc-shaped extension plate at the rear of the base. The locking plate B is fixed to the screw hole at the rear end of the lock body by a screw.

4. The universal fingerprint lock body according to claim 3, characterized in that: The locking piece B includes a rotating piece and a long handle. The rotating piece is pear-shaped with one end larger than the other end and is arranged in the arc-shaped extension piece at the rear of the base. A through hole for passing the screw is provided in the middle of the rotating piece, and the long handle is fixedly connected to the small end face of the rotating piece.

5. A universal fingerprint lock body, consisting of universal parts and a lock body connector C, characterized by: The general parts include a lock cover, a lock body, and a circuit board, a battery and a motor fixing plate that are connected in sequence inside the lock cover. The lock body is fixedly connected to the lock cover. Extended arc-shaped ear plates are provided on both sides of the rear part of the circuit board fixing plate. A recessed surface is provided on the front part of the arc-shaped ear plate. Screw holes are provided at the bottom of the recessed surface. The circuit board and the battery are clamped between the arc-shaped ear plates on both sides. The motor is fixed behind the motor fixing plate. The lock body is sleeved on the outside of the motor, and the motor fixing plate is fixed to the lock body by a countersunk screw A; the lock body connecting part C includes a lock core and a back seat. The lock core is fixed to the back of the lock body by a rubber washer and a countersunk screw C. The back seat consists of a cylindrical section on one side and a square seat extending from the rear. The back of the lock body and the lock core are sleeved in the cylindrical section of the back seat and locked by a spring and a locating pin. A U-shaped lock plate C is fixed on the connecting surface of the cylindrical section and the square seat. A cavity for placing the lock plate D is provided in the square seat, and the protrusion on the lock core cooperates with the "U"-shaped concave surface on the lock plate D.

6. The universal fingerprint lock body according to claim 1, 3 or 5, characterized in that: Both sides of the interior of the lock cover are provided with convex columns, which are arranged in the concave surfaces of the arc-shaped ear plates on both sides of the circuit board fixing plate.

7. The universal fingerprint lock body according to claim 1, 3 or 5, characterized in that: There are "U"-shaped steps on both sides of the motor fixing plate, and screw holes are provided on the step surfaces. There are arc-shaped grooves on the outer sides of the steps. Three insertion holes are arranged between the two "U"-shaped steps. Extension pieces are provided on the upper and lower parts of the middle insertion hole. The opposite surfaces of the two extension pieces are set as flat surfaces, and the outer surfaces are set as arc surfaces. Flat surfaces are milled on the upper and lower surfaces of the front of the motor. The flat surfaces on the motor are respectively matched with the two extension pieces. The lock body includes a flange at the front and a cylindrical section at the rear. The two extension pieces of the motor fixing plate are aligned with the flat surfaces of the motor. After the surfaces are matched, they are sleeved in the cylindrical section. "L"-shaped connecting seats are fixed on both sides of the front of the lock body flange. The horizontal sections of the "L"-shaped connecting seat are respectively arranged in the "U"-shaped steps on both sides of the motor fixing plate. The screw holes on the horizontal sections of the "L"-shaped connecting seat are arranged corresponding to the screw holes on the step surface of the "U"-shaped step, and are fixedly connected by countersunk screws A; the vertical sections of the "L"-shaped connecting seat pass through the arc-shaped grooves on the outer side surface of the step and are arranged corresponding to the screw holes at the bottom of the concave surface of the arc-shaped ear plate, and are fixedly connected by countersunk screws B.

8. The universal fingerprint lock body according to claim 1, 3 or 5, characterized in that: A through hole is provided in the middle of the circuit board fixing plate, and three recessed grooves are provided outside the through hole along its circumferential direction. A convex circle is provided on the inner surface of the circuit board to match the through hole of the circuit board fixing plate, and three protrusions are provided outside the convex circle along its circumferential direction and are respectively arranged in the three recessed grooves.

9. The universal fingerprint lock body according to claim 5, characterized in that: The four corners of the rear seat are provided with connecting holes which correspond to the through holes on the four corners of the locking plate C and are fixed by screws.

10. The universal fingerprint lock body according to claim 1, 3 or 5, characterized in that: A notch is provided on the outer circumferential surface of the positioning pin, the eccentric shaft at the rear of the motor is clamped in the notch, and the spring is sleeved on the convex column at the lower part of the positioning pin.

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