Lock cylinder mechanism

Abstract

The utility model discloses a lock cylinder mechanism, which belongs to the field of locks, solves the problem that the sealing effect of a sealing gasket is affected by poor stability between a rigid base plate and an outer lock cylinder shaft, and adopts the technical scheme that the lock cylinder mechanism mainly comprises an inner lock cylinder body, an outer lock cylinder body and a connecting rod, the inner lock cylinder body is provided with an unlocking handle, and the outer lock cylinder body is provided with a lock cylinder shaft; an unlocking dial wheel is arranged between the unlocking handle and the lock cylinder shaft, the unlocking handle is provided with an inner transmission block, the lock cylinder shaft is provided with an outer transmission block, the unlocking dial wheel is in transmission connection with the inner transmission block and the outer transmission block, the connecting rod is provided with a fixing block, the fixing block is provided with a through hole, a sealing gasket is arranged between the fixing block and the outer lock cylinder body, and the outer transmission block penetrates through the sealing gasket. A protection cover is arranged between the outer lock cylinder body and the fixing block, wraps the sealing gasket in the circumferential direction and is fixed to the inner end of the lock cylinder shaft, and the sealing gasket abuts against the inner end face of the lock cylinder shaft. The utility model mainly improves the connection stability of the protective cover and the lock cylinder shaft piece so as to improve the sealing effect of the sealing gasket.

Description

Technical Field

[0001] The utility model relates to the field of locks, in particular to a lock core mechanism. Background Art

[0002] In order to prevent the protective performance of the door lock from being invalidated after the lock core of the door lock is violently damaged, a locking member is usually provided in the lock core structure of the door lock so that the lock core can actively limit the rotation and opening of the unlocking dial after being violently damaged. For example, the lock core structure disclosed in the prior art CN203939302U and CN205000743U includes a left lock core body and a right lock core body connected by a connecting rod, an unlocking dial is provided between the left lock core body and the right lock core body, the unlocking dial and the left unlocking handle are connected and transmitted by a left transmission block passing through the unlocking dial, the front end of the left transmission block forms a linkage clamping head, the right lock core shaft links the right transmission block, the front end of the right transmission block forms a linkage slot, the linkage slot cooperates with the linkage clamping head, a sliding locking pin is provided on the upper and lower diameter of the unlocking dial, one end of the sliding locking pin is connected to the compression spring, and the other end cooperates with the right transmission block, an annular groove is provided on the circumference of the sliding locking pin, and the unlocking dial is radially moved up and down. Two locking grooves are provided, in which locking springs and locking pins are installed, and the locking pins cooperate with the annular grooves. When the left lock core body (the side outside the door) is violently damaged, this lock core structure can use the movement of the sliding locking pin to actively limit the rotation and opening of the unlocking dial. It has the advantages of compact structure, strong anti-theft performance, wide application range, and high reliability. However, when facing quick-freezing violent disassembly, water or freezing agents will penetrate into the unlocking dial, causing the sliding locking pin to be frozen and move outward. The position of the sliding locking pin remains unchanged, and the annular groove cannot cooperate with the locking groove, so that the locking piece cannot be inserted into the annular groove to lock, and the unlocking dial cannot self-lock. The door lock can be opened by turning the unlocking dial, and the anti-theft function fails.

[0003] In order to solve the above technical problems, in the prior art CN221298845U, a sealing gasket is provided between the fixed block and the outer core body to seal the through hole, and the outer transmission block passes through the sealing gasket and seals and cooperates to prevent the sliding locking pin from being frozen in the initial position and failing. However, in the prior art CN221298845U, a receiving groove is provided on the inner end face of the outer core shaft, and the sealing gasket is placed in the receiving groove, and then a rigid pad is used to prevent the sealing gasket from detaching from the receiving groove. Since the rigid pad is only in contact with the inner end face of the outer core shaft, the stability between the rigid pad and the inner end of the outer lock core shaft is poor, and the sealing gasket may detach from the receiving groove, thereby affecting the sealing effect of the sealing gasket. Utility Model Content

[0004] The purpose of the present invention is to provide a lock core mechanism to solve the problem that the poor stability between the rigid pad and the outer lock core shaft affects the sealing effect of the sealing gasket, and to improve the connection stability between the protective cover and the lock core shaft to improve the sealing effect of the sealing gasket.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a lock core mechanism, comprising an inner lock core body, an outer lock core body and a connecting rod fixedly connected to the inner lock core body and the outer lock core body, the inner lock core body is provided with an unlocking handle, the outer lock core body is provided with a lock core shaft, an unlocking dial wheel is provided between the unlocking handle and the lock core shaft, the unlocking handle is provided with an inner transmission block, the lock core shaft is provided with an outer transmission block, the unlocking dial wheel is transmission-connected with the inner transmission block and the outer transmission block, the connecting rod is provided with a fixed block, the fixed block is provided with a through hole for the outer transmission block to pass through, a sealing gasket is provided between the fixed block and the outer lock core body to seal the through hole, the outer transmission block passes through the sealing gasket and seals, a protective cover is provided between the outer lock core body and the fixed block, the protective cover circumferentially wraps the sealing gasket, the protective cover is fixed to the inner end of the lock core shaft and abuts the sealing gasket against the inner end face of the lock core shaft.

[0006] The invention can prevent the outer lock wheel from being driven by the tool and the outer lock core shaft from being violently disassembled and violently unlocked by rotating the outer drive block with a tool, so as to prevent the sealing gasket from being separated from the lock core shaft and affecting the sealing effect of the sealing gasket, a sealing gasket is installed at the inner end of the lock core shaft to prevent the sealing gasket from being separated from the lock core shaft and affecting the sealing effect of the sealing gasket. A protective cover is installed, which wraps the sealing gasket circumferentially to prevent the sealing gasket from extending radially outward after being over-extruded and affecting the sealing effect of the sealing gasket. The protective cover is fixed to the inner end of the lock core shaft and the sealing gasket abuts against the inner end face of the lock core shaft to prevent the lock core shaft and the protective cover from detaching and causing the sealing gasket to be unstable, thereby avoiding affecting the sealing effect of the sealing gasket. After the protective cover is fixed, it abuts against the sealing gasket, so that the sealing gasket fits better to the outer peripheral wall of the outer transmission block when squeezed between the lock core shaft and the protective cover, thereby improving the sealing effect of the sealing gasket; by fixing the protective cover to the inner end of the lock core shaft, the stability of the protective cover is improved, the stability of the sealing gasket is improved, and thus the sealing effect of the sealing gasket is improved.

[0007] Furthermore, a limiting portion is provided on the outer side of the protective cover, and a limiting surface is provided on the outer peripheral wall of the inner end of the lock core shaft. The limiting portion abuts against the limiting surface to fix the sealing gasket in the axial direction.

[0008] By adopting the above-mentioned technical solution, when the protective cover is fixed to the inner end of the lock core shaft, the limiting portion is fitted with the limiting surface of the outer peripheral wall of the lock core shaft to fix the sealing gasket in the axial direction, thereby improving the axial stability of the protective cover on the lock core shaft, preventing the protective cover from detaching from the lock core shaft and affecting the stability of the sealing gasket, and further ensuring the sealing effect of the sealing gasket.

[0009] Furthermore, the inner diameter of the limiting portion gradually decreases from the inside to the outside so that the inner side wall of the limiting portion forms a tapered portion with a larger inner side and a smaller outer side, and the limiting surface cooperates with the inner side wall of the tapered portion.

[0010] Using the above-mentioned technical solution, the inner diameter of the limiting part is set to a tapered part with a larger inner end and a smaller outer end, and then the limiting surface is matched with the inner side wall of the tapered part. When the lock core shaft moves axially, the protective cover and the sealing gasket are driven to move synchronously, further improving the stability of the connection between the protective cover and the lock core shaft, thereby preventing the protective cover from separating from the lock core shaft and affecting the sealing effect of the sealing gasket.

[0011] Furthermore, the unlocking dial has a transmission connection part at its inner end and a sleeve part at its outer end, the inner transmission block is transmission-connected to the transmission connection part, and the outer transmission block extends into the sleeve part and is transmission-connected to the inner transmission block.

[0012] By adopting the above-mentioned technical solution, the inner transmission block is connected to the unlocking dial wheel through the transmission connection part, so that when the unlocking handle is rotated, the inner transmission block drives the unlocking dial wheel to rotate, thereby unlocking or locking the door. The outer transmission block is extended into the sleeve part and is connected to the inner transmission block. When using the key to unlock, the lock core shaft is rotated to drive the outer transmission block to rotate, thereby driving the inner transmission block and the unlocking dial wheel to rotate, thereby improving the stability of the lock core shaft and the unlocking handle driving the unlocking dial wheel to rotate, thereby improving the smoothness of the user opening or locking the door.

[0013] Furthermore, the outer end of the outer transmission block is transmission-connected to the lock core shaft, and the inner end is provided with a plug-in slot. The outer end of the inner transmission block extends into the plug-in slot to make the inner transmission block and the outer transmission block transmission-connected. The transmission connection part is provided with a pushing member for pushing the outer transmission block after the lock core shaft is violently disassembled to make the outer transmission block separate from the inner transmission block to prevent violent unlocking.

[0014] When adopting the above-mentioned technical solution, when the outer transmission block and the inner transmission block are connected in transmission, the outer end of the inner transmission block is plugged into the plug-in slot of the inner end of the outer transmission block. When the lock core shaft is forcibly disassembled, the outer end of the outer transmission block lacks obstruction, and the pushing member pushes the outer transmission block outward on the transmission connection part, causing the outer end of the inner transmission block to disengage from the plug-in slot, so that the outer transmission block and the inner transmission block are no longer connected in transmission, avoiding the use of tools to rotate the outer transmission block and violent unlocking.

[0015] Furthermore, the pushing member includes a first pushing rod and a first limit pin, the transmission connection part is provided with a first chamber, the first pushing rod is slidably arranged in the first chamber, the first pushing rod abuts the outer transmission block and the first pushing rod has a tendency to push the outer transmission block to slide outward to disengage from the inner transmission block, the outer peripheral wall of the inner end of the first pushing rod is provided with a first anti-riot groove, the first limit pin is provided in the transmission connection part, the first limit pin has an initial position that does not affect the unlocking of the unlocking dial wheel and a locking position that locks the unlocking dial wheel after the lock core shaft is violently disassembled, when the first limit pin is in the locking position, the first limit pin extends into the first anti-riot groove to keep the outer transmission block and the inner transmission block disengaged so that the unlocking dial wheel is locked.

[0016] When the lock core shaft is forcibly disassembled, the first push rod pushes the outer transmission block outward, and the use of tools cannot drive the unlocking dial to rotate. In order to avoid forcibly pushing the outer transmission block inward so that the inner transmission block and the outer transmission block are connected again, the pushing member is provided with a first push rod and a first limit pin. When the lock core shaft is not disassembled, the first limit pin is in the initial position and does not affect the transmission connection between the outer transmission block and the inner transmission block. The unlocking dial can be driven to rotate normally to open or lock the door; when the lock core shaft is forcibly disassembled, the first push rod pushes the outer transmission block outward, and the use of tools cannot drive the unlocking dial to rotate. The push rod pushes the outer transmission block to slide outward, and the outer transmission block is separated from the inner transmission block; the first limit pin changes from the initial position to the locked position. At this time, the first limit pin extends into the first anti-riot groove, so that the outer transmission block and the inner transmission block remain disengaged. When the outer transmission block is violently pushed inward, the first limit pin is inserted into the lower first anti-riot groove, so that the first push rod remains in contact with the outer transmission block, and the outer transmission block cannot slide inward to connect the inner transmission block, thereby preventing the unlocking dial wheel from being unlocked after being violently pushed, thereby improving the safety performance of the lock cylinder.

[0017] Furthermore, the outer end of the inner transmission block and the outer end of the transmission connection part are eccentrically arranged so that the inner wall of the outer end of the transmission connection part forms an abutment platform, the outer peripheral wall of the inner end of the first limit rod is provided with a second anti-riot groove, and the abutment platform is provided with a second limit pin. The second limit pin has an initial position that does not affect the unlocking of the unlocking dial wheel and a locking position that locks the unlocking dial wheel after the lock core shaft is violently disassembled. When the second limit pin is in the locking position, the second limit pin extends into the second anti-riot groove to keep the outer transmission block and the inner transmission block disengaged so that the unlocking dial wheel is locked.

[0018] By adopting the above-mentioned technical solution, the outer end of the inner transmission block and the outer end of the transmission connection part are eccentrically arranged, so that the outer end of the inner transmission block forms a torque between the transmission connection part, which is convenient for driving the unlocking dial wheel to rotate to unlock, and an abutment platform is formed on the inner side wall of the outer end of the transmission connection part, and a second limit pin is provided on the abutment platform. The first push rod is provided with a second anti-riot groove, and the second limit pin extends into the second anti-riot groove, so that the first limit pin and the second limit pin lock the first push rod at the same time, further avoiding violent pushing that causes the outer transmission block to be connected to the inner transmission block again, thereby further improving the anti-riot safety of the lock core.

[0019] Furthermore, the transmission connection portion is provided with a second chamber, and the second chamber is provided with a second push rod abutting against the inner end surface of the outer transmission block, and the second push rod has a tendency to abut the inner transmission block outward.

[0020] By adopting the above-mentioned technical solution, during the outward sliding process of the outer transmission block, the second push rod pushes the outer transmission block from a position different from the first push rod, thereby avoiding the deflection of the outer transmission block due to unilateral push during the outward sliding process, which causes the outer transmission block and the inner transmission block to be stuck and not disengaged, thereby affecting the anti-riot effect of the lock core mechanism.

[0021] Furthermore, the outer peripheral wall of the inner end of the second push rod is provided with a third anti-riot groove, and the transmission connection part is provided with a third limit pin. The third limit pin has an initial position that does not affect the unlocking of the unlocking dial wheel and a locking position that locks the unlocking dial wheel after the lock core shaft is violently disassembled. When the third limit pin is in the locking position, it extends into the third anti-riot groove to keep the outer transmission block and the inner transmission block disengaged so that the unlocking dial wheel is locked.

[0022] By adopting the above-mentioned technical solution, after the second push rod assists the first push rod to push the outer transmission block outward, the third limit pin extends into the third anti-riot groove, thereby locking the second push rod in the axial direction of the unlocking dial wheel, so that the second push rod and the first push rod both abut against the outer transmission block after violent disassembly, further improving the anti-riot safety of the lock core; by the first push rod and the second push rod abutting against the outer transmission block at the same time, the safety is further improved, and the outer transmission block is prevented from sliding inward and connecting with the inner transmission block under violent abutment.

[0023] Furthermore, the third limit pin is arranged to slide radially along the transmission connection part, and a groove is provided on the side of the third limit pin away from the second push rod. The elastic member extends into the groove and abuts the third limit pin toward the second push rod, so that the third limit pin has a tendency to be inserted into the third riot-proof groove.

[0024] By adopting the above-mentioned technical solution, the elastic member pushes the third limit pin in the radial direction of the transmission connection part, so that after the second push rod pushes the outer transmission block outward, the elastic member pushes the third limit pin so that the third limit pin extends into the third riot-proof groove, thereby improving the stability of the second push rod after being locked; the elastic member extends into the groove to prevent the elastic member from disengaging from the third limit pin and affecting the riot-proof effect of the second push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of a lock core mechanism of the present utility model;

[0027] Figure 2 This is an exploded schematic diagram of the overall mechanism of the utility model;

[0028] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0029] Figure 4 For this utility model Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 For this utility model Figure 3 Middle B shows the enlarged image;

[0031] Figure 6 Schematic diagram of the locking positions of the first limit pin, the second limit pin and the third limit pin in the present invention;

[0032] Figure 7 This is a schematic diagram of the installation of the first limiting pin, the second limiting pin and the third limiting pin in the present utility model. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0034] The terms "first," "second," and so on (if any) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or precedence. Even if "second" is used before a technical feature to distinguish it, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. It should be understood that in this utility model, "plurality" refers to two or more. "And / or" is merely a description of an association between related objects, indicating that three relationships can exist. For example, "X and / or Y" can mean: X exists alone, X and Y exist simultaneously, or Y exists alone. The character " / " generally indicates that the related objects are in an "or" relationship. "Including X, Y, and Z" means that all three of X, Y, and Z are included. "Including X, Y, or Z" means that one of X, Y, and Z is included. "Including X, Y, and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0035] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0036] like Figure 1 As shown, the utility model provides a lock core mechanism, including an inner lock core body 2, an outer lock core body 1, and a connecting rod 3 fixedly connected to the inner lock core body 2 and the outer lock core body 1, as shown in FIG. Figure 2 As shown, the inner lock core body 2 is provided with an unlocking handle 21, the outer lock core body 1 is provided with a lock core shaft 11, and an unlocking dial wheel 4 is provided between the unlocking handle 21 and the lock core shaft 11. Figure 3 As shown, the unlocking handle 21 is provided with an inner transmission block 22, the lock core shaft 11 is provided with an outer transmission block 14, the unlocking dial wheel 4 is transmission-connected to the inner transmission block 22 and the outer transmission block 14, the connecting rod 3 is provided with a fixed block 31, the fixed block 31 is provided with a through hole 311 for the outer transmission block 14 to pass through, and a sealing gasket 12 is provided between the fixed block 31 and the outer lock core body 1 to seal the through hole 311, and the outer transmission block 14 passes through the sealing gasket 12 and is sealed.

[0037] In this embodiment, in order to improve the stability and sealing effect of the sealing gasket 12, as shown in FIG. Figure 3 and Figure 4 As shown, a protective cover 13 is provided between the outer lock core body 1 and the fixed block 31. The protective cover 13 wraps the sealing gasket 12 circumferentially to prevent the sealing gasket 12 from excessively extending radially outward after being squeezed, thereby affecting the sealing effect of the sealing gasket 12 on the through hole 311. The protective cover 13 is fixed to the inner end of the lock core shaft 11 and abuts the sealing gasket 12 against the inner end surface of the lock core shaft 11. By fixing the protective cover 13 to the inner end of the lock core shaft 11, it is prevented that the protective cover 13 is separated from the inner end surface of the lock core shaft 11 and affects the sealing effect of the sealing gasket 12. After the sealing gasket 12 is abutted, it is also wrapped by the protective cover 13 in the circumferential direction, causing the sealing gasket 12 to extend inward after being abutted, so that the sealing gasket 12 is more closely fitted to the outer peripheral wall of the outer transmission block 14.

[0038] In order to improve the stability of the protective cover 13, as Figure 3 and Figure 4 As shown, a limiting portion 131 is provided on the outside of the protective cover 13. Specifically, the inner diameter of the limiting portion 131 gradually decreases from the inside to the outside so that the inner side wall of the limiting portion 131 forms a tapered portion with a larger inner side and a smaller outer side. A limiting surface 111 is provided on the outer peripheral wall of the inner end of the lock core shaft 11. The inner side wall of the limiting portion 131 fits with the limiting surface 111 to fix the sealing gasket 12 in the axial direction, so as to improve the stability of the protective cover 13 after it is fixed, and ensure that the protective cover 13 abuts against the sealing gasket 12 so that the sealing gasket 12 seals the through hole 311, thereby reducing the liquid from penetrating from the through hole 311 to the unlocking dial 4 and the inner transmission block 22, causing the inner transmission block 22 to be frozen in the initial position and violently unlocked; ensuring the sealing effect of the sealing gasket 12 to avoid violent unlocking; In another embodiment, the inner wall of the limiting portion 131 can be corrugated or serrated, and the limiting surface 111 cooperates with the inner circumferential wall of the limiting portion 131 to improve the stability of the protective cover 13 after it is fixed, thereby ensuring the stability of the sealing gasket 12 to improve the sealing effect.

[0039] In order to improve the smoothness of the lock core mechanism when unlocking, as shown in Figure 3 and Figure 5 , the inner end of the unlocking dial 4 has a transmission connection part 41, and the outer end has a sleeve connection part 42. The inner transmission block 22 is in transmission connection with the transmission connection part 41, and the outer end of the inner transmission block 22 extends to the sleeve connection part 42. The outer transmission block 14 extends into the sleeve connection part 42. The inner end surface of the outer transmission block 14 is provided with a plug-in groove 141, and the outer end of the inner transmission block 22 is plugged into the plug-in groove 141, so that the outer transmission block 14 and the inner transmission block 22 are in transmission connection. When a user unlocks from the outside, the lock core shaft 11 is rotated by a matching key, which drives the outer transmission block 14 to rotate. The outer transmission block 14 and the inner transmission block 22 are connected by plug-in connection, which drives the inner transmission block 22 to rotate, and then drives the unlocking dial 4 to rotate through the transmission connection part 41, thereby unlocking or locking the door. When a user is inside, the inner transmission block 22 is rotated by rotating the unlocking handle 21, and then the unlocking dial 4 is rotated through the transmission connection part 41 to unlock or lock the door.

[0040] As shown in Figure 3 and Figure 5 , in order to avoid violent disassembly of the lock core shaft 11, the inner transmission block 22 and the outer transmission block 14 still maintain transmission connection and are violently unlocked, the transmission connection part 41 is provided with a pusher 5 which pushes the outer transmission block 14 after the lock core shaft 11 is violently disassembled to make the outer transmission block 14 separate from the inner transmission block 22 to prevent violent unlocking.

[0041] As shown in Figures 3 to 7 , specifically, as shown in Figure 3 and Figure 5 , the pusher 5 includes a first push rod 51, and the transmission connection part 41 is provided with a first cavity 411 which is eccentrically arranged relative to the inner transmission block 22, and the length direction of the first cavity 411 is parallel to the axis direction of the unlocking dial 4. The first push rod 51 is slidingly arranged in the first cavity 411, and the first push rod 51 abuts against the inner end surface of the outer transmission block 14, and the first push rod 51 has a tendency to push the outer transmission block 14 to slide outward to separate from the inner transmission block 22; as shown in Figure 5 and Figure 6As shown, a first spring 513 is provided between the first push rod 51 and the outer end face of the unlocking handle 21, and the first spring 513 keeps pushing the first push rod 51 outward. When the lock core shaft 11 is forcibly disassembled, the outer end face of the outer transmission block 14 is free of obstruction, and the first push rod 51 pushes the outer transmission block 14 to slide outward, causing the outer end of the inner transmission block 22 to completely disengage from the insertion groove 141, so that the outer transmission block 14 and the inner transmission block 22 are no longer in transmission connection, thereby preventing the outer transmission block 14 from being rotated by a tool after the lock core shaft 11 is forcibly disassembled, thereby driving the unlocking dial wheel 4 to rotate and unlock. In order to further prevent the outer transmission block 14 from being forcibly pushed inward so that the outer transmission block 14 and the inner transmission block 22 are in transmission connection again and thus forcibly unlocking, as shown in FIG. Figure 5 As shown, the push member 5 also includes a first limit pin 52, and the outer peripheral wall of the inner end of the first push rod 51 is provided with a first anti-riot groove 511. The first limit pin 52 is slidably provided on the transmission connection part 41. The axis of the first limit pin 52 is perpendicular to the axis of the first push rod 51. The first limit pin 52 has an initial position that does not affect the unlocking of the unlocking dial 4 and a locked position that allows the unlocking dial 4 to be locked after the lock core shaft 11 is violently disassembled; specifically, the transmission connection part 41 is provided with a second spring 521 located at the first limit pin 52 away from the first push rod 51, as shown in FIG. Figure 6 As shown, when the first push rod 51 pushes the outer transmission block 14 to put the first limit pin 52 in the locked position, the second spring 521 pushes the first limit pin 52 toward the first push rod 51, so that the first limit pin 52 extends into the first anti-riot groove 511, thereby locking the first push rod 51 in the axial direction of the unlocking dial 4, avoiding the outer transmission block 14 from being violently pushed inward so that the outer transmission block 14 and the inner transmission block 22 are connected again, ensuring that the outer transmission block 14 and the inner transmission block 22 remain disengaged so that the unlocking dial 4 is locked, thereby avoiding the outer transmission block 14 from being violently pushed so that the outer transmission block 14 and the inner transmission block 22 are connected and violently unlocked, thereby improving the safety of the lock core mechanism.

[0042] In order to further improve the anti-riot safety of the first push rod 51, Figure 5 and Figure 6As shown, the outer end of the inner transmission block 22 and the outer end of the transmission connection part 41 are eccentrically arranged so that the inner wall of the outer end of the transmission connection part 41 forms an abutment platform 413. The eccentric connection mode makes it possible for the inner transmission block 22 to drive the unlocking dial 4 to rotate and form an eccentric distance to form a torque, which is convenient for the user to turn the unlocking handle 21 or the key to open or lock the door; the outer peripheral wall of the inner transmission block 22 is provided with a first abutment surface 221, and the abutment platform 413 is formed by the inner wall of the outer end of the transmission connection part 41 protruding toward the axis, and the inner side wall of the abutment platform 413 forms a second abutment surface 4131. When the unlocking dial 4 and the inner transmission block 22 are installed, the first abutment surface 221 is provided on the outer peripheral wall of the inner transmission block 22. The surface 221 abuts against the second abutting surface 4131, so as to prevent the inner transmission block 22 from sliding outwards and remaining plugged with the outer transmission block 14 and being violently unlocked when the lock core shaft 11 is violently disassembled; the outer peripheral wall of the inner end of the first push rod 51 is provided with a second anti-riot groove 512, and the abutting platform 413 is provided with a second limiting pin 53, the axis of the second limiting pin 53 is parallel to the axis of the first limiting pin 52, and is perpendicular to the axis direction of the first push rod 51, and the second limiting pin 53 has an initial position that does not affect the unlocking of the unlocking dial 4 and a locked position that allows the unlocking dial 4 to be locked after the lock core shaft 11 is violently disassembled, such as Figure 6 As shown, when the second limiting pin 53 is in the locked position, the second limiting pin 53 extends into the second anti-riot groove 512 to lock the first push rod 51, so that the outer transmission block 14 and the inner transmission block 22 remain disengaged so that the unlocking dial 4 is locked, thereby preventing violent unlocking; specifically, a third spring 531 is provided between the abutment platform 413 and the second limiting pin 53, and the third spring 531 has a tendency to push the second limiting pin 53 into the second anti-riot groove 512; as shown Figure 7 As shown, the first limiting pin 52 and the second limiting pin 53 are distributed up and down and lock the first push rod 51 from two parallel directions respectively, thereby improving the anti-riot safety of the first push rod 51.

[0043] In the above embodiment, although the first limit pin 52 and the second limit pin 53 both lock the first push rod 51, the outer transmission block 14 is only pushed outward by the first push rod 51. Therefore, the outer transmission block 14 is subjected to unbalanced force during the outward sliding process, which can easily cause the outer transmission block 14 to deflect and get stuck.

[0044] To prevent the outer transmission block 14 from being stuck due to unilateral force, Figure 5 、 Figure 6 and Figure 7As shown, the transmission connection part 41 is provided with a second chamber 412, the axial direction of the second chamber 412 is parallel to the axial direction of the unlocking dial 4, and the second chamber 412 and the first chamber 411 are evenly distributed on both sides of the inner transmission block 22; the second chamber 412 is provided with a second push rod 54 that abuts the inner end face of the outer transmission block 14, and a fourth spring 541 is provided between the second push block and the outer end face of the unlocking handle 21, and the fourth spring 541 has a tendency to push the second push rod 54 outward, so that the second push rod 54 has a tendency to abut the inner transmission block 22 outward, and the first push rod 51 and the second push rod 54 abut the outer transmission block 14 on both sides of the axis of the unlocking dial 4, so that the outer transmission block 14 is subjected to force on both sides when it slides outward after the lock core shaft 11 is forcibly disassembled, thereby preventing the outer transmission block 14 from being stuck due to unilateral force, and thus preventing the outer transmission block 14 from being stuck and maintaining a transmission connection state with the inner transmission block 22 after the lock core shaft 11 is violently disassembled, and being violently unlocked.

[0045] In this embodiment, if Figure 5 、 Figure 6 and Figure 7 As shown, the outer peripheral surface of the inner end of the second push rod 54 is provided with a third anti-riot groove 542, and the transmission connection part 41 is provided with a third limit pin 543. The third limit pin 543 is perpendicular to the axial direction of the second push rod 54. The third limit pin 543 has an initial position that does not affect the unlocking of the unlocking dial 4 and a locked position that allows the unlocking dial 4 to be locked after the lock core shaft 11 is violently disassembled. When the third limit pin 543 is in the locked position, it extends into the third anti-riot groove 542 to keep the outer transmission block 14 and the inner transmission block 22 disengaged so that the unlocking dial 4 is locked; specifically, the third limit pin 543 is set to slide radially along the transmission connection part 41, and the third limit pin 543 is away from the second push rod 54. A groove 5431 is provided on one side of the movable rod 54, and an elastic member 544 is provided in the groove 5431. The groove 5431 is sleeved with the elastic member 544 to prevent the elastic member 544 from disengaging from the third limit pin 543 and affecting the third limit pin 543 from locking the second push rod 54. The other end of the elastic member 544 abuts against the inner wall of the outer shell of the lock core mechanism; when the third limit pin 543 is in the initial position, the third limit pin 543 abuts against the outer peripheral wall of the second push rod 54. When the third limit pin 543 is in the locked position, the elastic member 544 drives the limit pin to extend into the third anti-riot groove 542, thereby locking the second push rod 54, further preventing it from being violently unlocked, and improving the safety of the lock core mechanism.

[0046] In addition to the above-mentioned preferred embodiments, the present invention has other implementation methods. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A lock core mechanism, comprising an inner lock core body, an outer lock core body, and a connecting rod fixedly connected to the inner lock core body and the outer lock core body, the inner lock core body is provided with an unlocking handle, the outer lock core body is provided with a lock core shaft, an unlocking dial is provided between the unlocking handle and the lock core shaft, the unlocking handle is provided with an inner transmission block, the lock core shaft is provided with an outer transmission block, the unlocking dial is transmission-connected to the inner transmission block and the outer transmission block, the connecting rod is provided with a fixed block, the fixed block is provided with a through hole for the outer transmission block to pass through, a sealing gasket is provided between the fixed block and the outer lock core body to seal the through hole, the outer transmission block passes through the sealing gasket and is sealed and matched, characterized in that A protective cover is provided between the outer lock core body and the fixed block. The protective cover circumferentially wraps the sealing gasket. The protective cover is fixed to the inner end of the lock core shaft and abuts the sealing gasket against the inner end surface of the lock core shaft.

2. The lock core mechanism according to claim 1, characterized in that: A limiting portion is provided on the outer side of the protective cover, and a limiting surface is provided on the outer peripheral wall of the inner end of the lock core shaft. The limiting portion abuts against the limiting surface to fix the sealing gasket in the axial direction.

3. The lock core mechanism according to claim 2, characterized in that: The inner diameter of the limiting portion gradually decreases from the inside to the outside so that the inner side wall of the limiting portion forms a tapered portion that is larger inside and smaller outside, and the limiting surface cooperates with the inner side wall of the tapered portion.

4. The lock core mechanism according to claim 1, characterized in that: The inner end of the unlocking dial has a transmission connection part, and the outer end has a sleeve part. The inner transmission block is transmission-connected with the transmission connection part, and the outer transmission block extends into the sleeve part and is transmission-connected with the inner transmission block.

5. The lock core mechanism according to claim 4, characterized in that: The outer end of the outer transmission block is transmission-connected to the lock core shaft, and the inner end is provided with a plug-in slot. The outer end of the inner transmission block extends into the plug-in slot to make the inner transmission block and the outer transmission block transmission-connected. The transmission connection part is provided with a pushing member for pushing the outer transmission block after the lock core shaft is violently disassembled to make the outer transmission block separate from the inner transmission block to prevent violent unlocking.

6. The lock core mechanism according to claim 5, characterized in that: The pushing member includes a first pushing rod and a first limit pin, the transmission connection part is provided with a first chamber, the first pushing rod is slidably arranged in the first chamber, the first pushing rod abuts the outer transmission block and the first pushing rod has a tendency to push the outer transmission block to slide outward to disengage from the inner transmission block, the outer peripheral wall of the inner end of the first pushing rod is provided with a first anti-riot groove, the first limit pin is provided in the transmission connection part, the first limit pin has an initial position that does not affect the unlocking of the unlocking dial wheel and a locking position that locks the unlocking dial wheel after the lock core shaft is violently disassembled, when the first limit pin is in the locking position, the first limit pin extends into the first anti-riot groove to keep the outer transmission block and the inner transmission block disengaged so that the unlocking dial wheel is locked.

7. The lock core mechanism according to claim 6, characterized in that: The outer end of the inner transmission block and the outer end of the transmission connection part are eccentrically arranged to form an abutment platform on the inner wall of the outer end of the transmission connection part. The outer peripheral wall of the inner end of the first push rod is provided with a second anti-riot groove, and the abutment platform is provided with a second limit pin. The second limit pin has an initial position that does not affect the unlocking of the unlocking dial wheel and a locking position that locks the unlocking dial wheel after the lock core shaft is violently disassembled. When the second limit pin is in the locking position, the second limit pin extends into the second anti-riot groove to keep the outer transmission block and the inner transmission block disengaged so that the unlocking dial wheel is locked.

8. The lock core mechanism according to claim 4, characterized in that: The transmission connection portion is provided with a second chamber, and the second chamber is provided with a second push rod abutting against the inner end surface of the outer transmission block, and the second push rod has a tendency to abut the inner transmission block outward.

9. The lock core mechanism according to claim 8, characterized in that: The outer peripheral wall of the inner end of the second push rod is provided with a third anti-riot groove, and the transmission connection part is provided with a third limit pin. The third limit pin has an initial position that does not affect the unlocking of the unlocking dial wheel and a locking position that locks the unlocking dial wheel after the lock core shaft is violently disassembled. When the third limit pin is in the locking position, it extends into the third anti-riot groove to keep the outer transmission block and the inner transmission block disengaged so that the unlocking dial wheel is locked.

10. The lock cylinder mechanism according to claim 9, characterized in that: The third limit pin is arranged to slide radially along the transmission connection part. A groove is provided on the side of the third limit pin away from the second push rod. The elastic member extends into the groove and abuts the third limit pin toward the second push rod, so that the third limit pin has a tendency to be inserted into the third riot-proof groove.

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