A key-turn lock body

Abstract

The present invention relates to a key-turning lock body, which includes a lock shell and a square tongue assembly and a lock core installed in the lock shell. A guide block capable of rotating relative to the lock shell around a rotation center axis is arranged in the lock shell, and an arc-shaped tooth composed of several teeth is arranged on the outer peripheral wall of the guide block; the square tongue assembly includes a square tongue frame and a square tongue installed on the square tongue frame. A straight rack is arranged on the square tongue frame, and the straight rack is meshed and connected with the arc-shaped tooth; the pick of the lock core is connected to the guide block, and the forward or reverse rotation of the pick can drive the guide block to rotate forward or reverse around the rotation center axis, and the forward or reverse rotation of the guide block makes the square tongue retract into the lock body or extend out of the lock body. The advantages of the present invention are that through the meshing transmission of the straight tooth and the arc-shaped tooth, it can overcome the problems of relatively large operating noise and jamming in the transmission of components in the existing structure, with silent operation, smooth transmission and labor saving.

Description

Technical Field

[0001] The present invention relates to a key-turning lock body. Background Art

[0002] The existing lock body includes a lock case and a square tongue assembly and a lock core installed in the lock case. The square tongue assembly includes a square tongue frame and a square tongue installed on the square tongue frame. The square tongue frame is provided with a bayonet opening, and the pick of the lock core is inserted into the bayonet opening. After the key is inserted into the lock core, the pick of the lock core swings back and forth under the drive of the key and acts on the two side walls of the bayonet opening, thereby driving the left and right movement of the square tongue frame, so as to realize locking or unlocking. However, the existing structure makes a relatively loud noise during operation, and the transmission of components is sometimes stuck. Therefore, there is a need for improvement in the existing structure. Summary of the Invention

[0003] The purpose of the present invention is to provide a key-turning lock body with silent operation and smooth transmission.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A key-turning lock body includes a lock case and a square tongue assembly and a lock core installed in the lock case. A guide block that can rotate relative to the lock case around a rotation center axis is arranged in the lock case, and an arc-shaped tooth composed of several teeth is arranged on the outer peripheral wall of the guide block; the square tongue assembly includes a square tongue frame and a square tongue installed on the square tongue frame. A straight rack is arranged on the square tongue frame, and the straight rack is meshed and connected with the arc-shaped tooth; the pick of the lock core is connected to the guide block, and the forward or reverse rotation of the pick can drive the guide block to rotate forward or reverse around the rotation center axis, and the forward or reverse rotation of the guide block makes the square tongue retract into the lock body or extend out of the lock body.

[0006] The advantage of the present invention is that through the meshing transmission of the straight tooth and the arc-shaped tooth, it can overcome the problems of relatively loud noise during operation and stuck transmission of components in the existing structure, with silent operation, smooth transmission and labor saving. Brief Description of the Drawings

[0007] Figure 1 is a three-dimensional state structure diagram of the lock body in the embodiment;

[0008] Figure 2 is a decomposed three-dimensional state structure diagram of the key-turning lock body in the embodiment;

[0009] Figure 3 is a cross-sectional view of the key-turning lock body in the embodiment;

[0010] Figure 4 is another cross-sectional view of the key-turning lock body in the embodiment;

[0011] Figure 5 is a three-dimensional state structure diagram (with part of the lock case removed) of the lock body with an inverted tongue in the embodiment;

[0012] Figure 6 It is a schematic diagram of the three-dimensional state structure of the inclined tongue component in the embodiment;

[0013] Figure 7 It is a schematic diagram of the decomposed three-dimensional state structure of the inclined tongue component in the embodiment;

[0014] Figure 8 It is a schematic diagram of the decomposed three-dimensional state structure of the inclined tongue component from another perspective in the embodiment;

[0015] Figure 9 It is a sectional view of the lock body structure of the inverted tongue in the embodiment (the inclined tongue tends to move out of the lock case under the action of the spring);

[0016] Figure 10 It is a sectional view of the lock body structure of the inverted tongue in the embodiment (the inclined tongue is inverted and retracted into the lock case by overcoming the spring force under the action of the doorframe);

[0017] Figure 11 It is a sectional view of the lock body structure of the inverted tongue in the embodiment (the inclined tongue tends to move out of the lock case under the action of the spring, and the limiting member leaves the limiting portion). Detailed implementation manners

[0018] As shown in the attached Figure 1 to the attached Figure 11 A lock body as shown includes a lock case 1 and a square tongue component, an inclined tongue component and a lock core 4 installed in the lock case 1.

[0019] The attached Figure 2 to the attached Figure 4 shows a lock body with a key twist. Specifically, a guide block 51 that can rotate relative to the lock case 1 around a rotation central axis 100 is provided in the lock case 1, and an arc-shaped tooth 511 composed of several teeth is provided on the outer peripheral wall of the guide block 51; more specifically, the guide block 51 is in the shape of an arc-shaped sheet, the arc central axis 101 of the guide block 51 is coaxial with the rotation central axis 100, and each tooth of the arc-shaped tooth 511 falls on the same circumference with the rotation central axis 100 as the central axis 101.

[0020] The square tongue component includes a square tongue frame 21 and a square tongue 22 installed on the square tongue frame 21. A straight rack 211 is provided on the square tongue frame 21, and the straight rack 211 is meshed and connected with the arc-shaped tooth 511; the pick 41 of the lock core 4 is connected to the guide block 51, and the forward or reverse rotation of the pick 41 can drive the guide block 51 to rotate forward or reverse around the rotation central axis 100, and the forward or reverse rotation of the guide block 51 makes the square tongue 22 retract into the lock body or extend out of the lock body. Through the meshing transmission of the straight rack 211 and the arc-shaped tooth 511, it can overcome the problems of relatively loud operation noise and jamming in the transmission of components in the existing structure, and is quiet, smooth in transmission and labor-saving.

[0021] An arc-shaped upper guide rail 52 and a lower guide rail 53 are provided on the lock housing 1. The central axis 101 of the arcs of the upper guide rail 52 and the lower guide rail 53 is coaxially arranged with the rotation central axis 100. The upper and lower end faces of the guide block 51 are correspondingly provided with an upper guide groove 512 and a lower guide groove 513 which are arc-shaped. The central axis 101 of the arcs of the upper guide groove 512 and the lower guide groove 513 is coaxially arranged with the rotation central axis 100. The upper guide rail 52 and the lower guide rail 53 are respectively in fit connection with the upper guide groove 512 and the lower guide groove 513.

[0022] The pick 41 of the lock core 4 extends into the space between two opposite ends of the guide block 51. The forward rotation of the pick 41 acts on one of the ends to drive the guide block 51 to rotate forward around the rotation central axis 100, and the reverse rotation of the pick 41 acts on the other end to drive the guide block 51 to rotate reversely around the rotation central axis 100. More specifically, the rotation central axis 101 of the pick 41 of the lock core 4 is coaxially arranged with the rotation central axis 100.

[0023] Attached Figure 5 to attached Figure 11 There is shown a lock body structure with a reverse tongue. Specifically, the inclined tongue assembly includes an inclined tongue bracket 31, an inclined tongue 32, an elastic member 33 and a pressing member 34 installed on the inclined tongue bracket 31. The inclined tongue bracket 31 is fixedly installed in the lock housing 1. The inclined tongue 32 abuts against the pressing member 34 and can rotate relative to the pressing member 34 around a central axis 101. The pressing member 34 is slidably arranged on the inclined tongue bracket 31 and under the action of the elastic member 33, it maintains a tendency to press the inclined tongue 32 to move out of the lock housing 1. The inclined tongue 32 rotates relative to the pressing member 34 around the rotation central axis 101 under the action of an external force and retracts into the lock housing 1 against the action of the elastic member 33.

[0024] There is also a locking device in the lock housing 1. The locking device includes a driving device and a limiting member 6 that moves under the action of the driving device. A limiting portion 321 is provided on the inclined tongue 32. When the inclined tongue 32 extends out of the lock housing 1, under the action of the driving device, the limiting member 6 engages with the limiting portion 321, and the inclined tongue 32 is prevented from rotating relative to the pressing member 34 around the central axis 101 and is in a locked state. When opening the door, the limiting member 6 leaves the limiting portion 321, and the inclined tongue 32 is only under the pressing action of the pressing member 34. At this time, when opening the door, the door frame 102 acts on the side surface of the inclined tongue 32, and the inclined tongue 32 will rotate relative to the pressing member 34 around the rotation central axis 101 and retract into the lock housing 1 against the action of the elastic member 33. Thus, it is avoided that in the process of the conventional inclined tongue 32 retracting into the lock housing 1 when opening the door, its side surface always contacts the lock housing 1, resulting in frictional force, making it difficult to open the door and causing damage to the inclined tongue 32. Especially when using electronic unlocking, since the frictional force can be reduced, when the inclined tongue 32 driven by the motor contracts, the load on the motor is reduced.

[0025] The mutually abutting surfaces of the abutting piece 34 and the oblique tongue 32 are correspondingly provided with a rotating recess 341 and a rotating protrusion 322 that cooperate with each other, and the rotating protrusion 322 falls into the rotating recess 341. Specifically, in the structure shown in the drawings, the rotating recess 341 is provided on the abutting piece 34 and the rotating protrusion 322 is provided on the oblique tongue 32.

[0026] The inclined tongue frame 31 is assembled by a left side plate 311, a right side plate 312, an upper cover plate 313, a lower cover plate 314 and a rear cover plate 315. The rear cover plate 315 is provided with a guide hole 316, and the upper cover plate 313 is provided with a guide groove 317 extending along the movement direction of the inclined tongue 32 extending out or retracting into the lock housing 1; the abutting member 34 is provided with a protrusion 342 and a guide column 343, and the protrusion 342 and the guide column 343 are respectively inserted into the guide groove 317 and the guide hole 316.

[0027] The elastic member 33 is a spring, which is sleeved on the guide pillar 343 , with one end of the spring abutting against the abutting member 34 and the other end abutting against the rear cover plate 315 .

[0028] The limiting portion 321 is a limiting groove arranged on the left side and the right side of the inclined tongue 32, or the limiting groove can be arranged only on the left side or the right side of the inclined tongue 32; correspondingly, the left plate 311 and the right plate 312 are provided with through grooves corresponding to the limiting grooves, or the left plate 311 or the right plate 312 are provided with through grooves corresponding to the limiting grooves. When the inclined tongue 32 is in a locked state, the limiting member 6 passes through the through groove and is stuck in the limiting groove.

[0029] The limiting member 6 maintains the state of being combined with the limiting portion 321 under the action of a return spring.

[0030] There are many ways for the limiting member 6 to move, one of which is described below. The driving device includes a motor and a motor gear driven by the motor, the motor gear is connected to the square tongue assembly to retract the square tongue 22 into the lock body or extend it out of the lock body, and a pull block is provided on the motor gear. When the motor gear acts on the square tongue assembly to retract the square tongue 22 into the lock body, the pull block acts on the limiting member 6 to overcome the action of the reset spring to disengage the limiting member 6 from the through groove and the limiting groove and allow the oblique tongue 32 to rotate relative to the abutting member 34 around the central axis 101.

[0031] Another movement mode of the limiting member 6 is introduced below: a mechanical gear is also provided in the lock housing 1, the mechanical gear is provided with a trigger head, the square tongue assembly is provided with a trigger part, and the limiting member 6 is provided with spur teeth meshing with the mechanical gear. When the puller 41 of the lock core 4 pulls the square tongue assembly to retract the square tongue 22 into the lock body, the trigger part acts on the trigger head to rotate the mechanical gear, and the mechanical gear and the spur teeth on the limiting member 6 are meshed for transmission. The limiting member 6 overcomes the action of the reset spring and disengages the limiting member 6 from the through groove and the limiting groove, allowing the inclined tongue 32 to rotate around the central axis 101 relative to the abutment member 34.

Claims

1. A key-turning lock body, comprising a lock case and a square tongue assembly and a lock core installed in the lock case, characterized in that, a guide block capable of rotating relative to the lock case around a rotation central axis is arranged in the lock case, and an arc-shaped tooth composed of several teeth is arranged on the outer peripheral wall of the guide block; the square tongue assembly includes a square tongue frame and a square tongue installed on the square tongue frame, a straight rack is arranged on the square tongue frame, and the straight rack is meshed and connected with the arc-shaped tooth; the pick of the lock core is connected to the guide block, the forward or reverse rotation of the pick can drive the guide block to rotate forward or reverse around the rotation central axis, the forward or reverse rotation of the guide block makes the square tongue retract into the lock body or extend out of the lock body, and each tooth of the arc-shaped tooth falls on the same circumference with the rotation central axis as the central axis, an arc-shaped upper guide rail and a lower guide rail are arranged on the lock case, and the arc central axes of the upper guide rail and the lower guide rail are coaxially arranged with the rotation central axis, upper guide grooves and lower guide grooves which are corresponding and arc-shaped are arranged on the upper and lower end faces of the guide block, the arc central axes of the upper guide grooves and the lower guide grooves are coaxially arranged with the rotation central axis, the upper guide rail and the lower guide rail are respectively in fit connection with the upper guide grooves and the lower guide grooves, the guide block is in the shape of an arc-shaped sheet body, the arc central axis of the guide block is coaxially arranged with the rotation central axis, the pick of the lock core extends into the space between two opposite ends of the guide block, the forward rotation of the pick acts on one of the ends to drive the guide block to rotate forward around the rotation central axis, and the reverse rotation of the pick acts on the other end to drive the guide block to rotate reverse around the rotation central axis.

2. The key-turning lock body according to claim 1, characterized in that, the rotation central axis of the pick of the lock core is coaxially arranged with the rotation central axis.

3. The key-turning lock body according to any one of claim 1 or claim 2, characterized in that, a bevel tongue assembly is installed in the lock case, the bevel tongue assembly includes a bevel tongue frame, a bevel tongue installed on the bevel tongue frame, an elastic member and an abutting member, the bevel tongue frame is fixedly installed in the lock case, the bevel tongue abuts against the abutting member and can rotate relative to the abutting member around a central axis, the abutting member is slidably arranged on the bevel tongue frame and under the action of the elastic member keeps the tendency of abutting the bevel tongue to move out of the lock case, and the bevel tongue rotates relative to the abutting member around the rotation central axis under the action of an external force and retracts into the lock case against the action of the elastic member.

4. The key-turning lock body according to claim 3, characterized in that, a locking device is further arranged in the lock case, the locking device includes a driving device and a limiting member moved under the action of the driving device, a limiting portion is arranged on the bevel tongue, when the bevel tongue extends out of the lock case, under the action of the driving device, the limiting member is combined with the limiting portion, and the bevel tongue is prevented from rotating relative to the abutting member around the central axis and is in a locked state.

5. The key-turning lock body according to claim 4, characterized in that, The limiting member is kept in a state of being combined with the limiting portion under the action of a return spring; a mechanical gear is further arranged in the lock case, a trigger head is arranged on the mechanical gear, a trigger portion is included on the square tongue assembly, straight teeth meshingly connected with the mechanical gear are arranged on the limiting member. When the square tongue is retracted into the lock body under the action of the pick of the lock core on the square tongue assembly, the trigger portion acts on the trigger head to rotate the mechanical gear, the mechanical gear and the straight teeth on the limiting member are in meshing transmission, and the limiting member overcomes the action of the return spring to disengage the limiting member from the through groove and the limiting groove, allowing the inclined tongue to rotate relative to the abutting member around the central axis.

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