阅读说明：本技术 防止技术开锁的锁芯结构 (Lock core structure for preventing technical unlocking ) 是由 雷学杰 于 2020-08-17 设计创作，主要内容包括：一种防止技术开锁的锁芯结构,包括锁壳、外锁胆和内锁胆；锁壳具有容置孔,外锁胆设置在容置孔中；外锁胆具有安装孔,内锁胆包括联合部和啮合部,联合部设置在安装孔中；容置孔具有啮合位置,在啮合位置设置有啮合件；内锁胆设置有钥匙孔,锁壳内沿轴向设置有多个与弹子通道,弹子通道内设置有弹子组件；容置孔设置有第一弹性件,第一弹性件向内锁胆施加推力,使啮合部与啮合件保持啮合状态,啮合件限制内锁胆相对锁壳转动；弹子组件满足第一条件：仅当钥匙孔内插入解锁钥匙时,弹子组件解除对外锁胆相对锁壳转动的限制,当钥匙孔内插入解锁钥匙时,弹子组件解除对内锁胆相对外锁胆沿轴向移动的限制。本发明可以有效防止技术开锁。(A lock core structure for preventing technical unlocking comprises a lock shell, an outer lock liner and an inner lock liner; the lock shell is provided with a containing hole, and the outer lock liner is arranged in the containing hole; the outer lock core is provided with a mounting hole, the inner lock core comprises a joint part and an engaging part, and the joint part is arranged in the mounting hole; the containing hole is provided with an engaging position, and an engaging piece is arranged at the engaging position; the inner lock liner is provided with a key hole, a plurality of marble passages are axially arranged in the lock shell, and marble components are arranged in the marble passages; the accommodating hole is provided with a first elastic piece, the first elastic piece applies thrust to the inner lock cylinder to enable the meshing part and the meshing piece to keep a meshing state, and the meshing piece limits the inner lock cylinder to rotate relative to the lock shell; the bullet assembly satisfies a first condition: the spring assembly releases the restriction of the rotation of the outer cylinder with respect to the housing only when the unlocking key is inserted into the key hole, and releases the restriction of the axial movement of the inner cylinder with respect to the outer cylinder when the unlocking key is inserted into the key hole. The invention can effectively prevent technical unlocking.)

1. The utility model provides a prevent lock core structure that technique was unblanked which characterized in that: comprises a lock shell, an outer lock liner and an inner lock liner; the lock shell is provided with a containing hole, and the outer lock liner is rotatably arranged in the containing hole; the outer lock cylinder is provided with a mounting hole, the inner lock cylinder comprises a joint part and an engagement part, the joint part is arranged in the mounting hole, the joint part can axially move relative to the outer lock cylinder, and the joint part and the outer lock cylinder are linked in the direction of rotating around the axial direction; the accommodating hole is provided with an engaging position, and an engaging piece is arranged at the engaging position; the lock comprises an inner lock liner, a lock shell and a plurality of pin tumbler channels, wherein the inner lock liner is provided with a key hole, the lock shell is internally provided with a plurality of pin tumbler channels communicated with the key hole along the axial direction, the pin tumbler channels are internally provided with pin tumbler assemblies and consist of a first pin tumbler hole penetrating through the inner lock liner, a second pin tumbler hole penetrating through the outer lock liner and a pin tumbler groove arranged on the inner wall of a containing hole; the accommodating hole is provided with a first elastic piece, and the first elastic piece applies thrust to the inner lock cylinder along the axial direction so as to enable the engagement part to move to the engagement position and keep the engagement state with the engagement piece; in the meshing state, the first pin hole, the second pin hole and the pin groove are coaxially arranged, and the meshing part limits the inner lock cylinder to rotate relative to the lock shell but does not limit the inner lock cylinder to axially move relative to the outer lock cylinder; the projectile assembly satisfies a first condition: the spring assembly releases the restriction of the rotation of the outer cylinder with respect to the housing only when the unlocking key is inserted into the key hole, and releases the restriction of the axial movement of the inner cylinder with respect to the outer cylinder when the unlocking key is inserted into the key hole.

2. The lock cylinder structure for preventing technical unlocking according to claim 1, characterized in that: the marble component comprises a first marble, a plurality of marble pieces, a second marble, a third marble and a second elastic piece which are sequentially arranged along the direction far away from the key hole.

3. The lock cylinder structure of preventing a technical unlocking according to claim 2, wherein the pin tumbler assembly satisfies a second condition when the engaging portion is in an engaged state with the engaging member and the key is not inserted into the key hole: the spring piece is positioned at the dividing position of the inner lock container and the outer lock container; or all the marble pieces are positioned in the first marble hole and the second marble does not extend into the first marble hole; or all the marble pieces are positioned in the second marble hole and the first marble does not extend into the second marble hole.

4. The lock cylinder structure for preventing technical unlocking according to claim 1, characterized in that: the engaging part is disc-shaped and is provided with a gap, the accommodating hole is provided with a ring opening matched with the engaging part, the engaging position is positioned on the inner wall of the ring opening, and the engaging part is a clamping block for filling the gap.

5. The lock cylinder structure for preventing technical unlocking according to claim 1, characterized in that: the cross-sectional shape of the joint part is a polygon, and the shape of the mounting hole is a polygon matched with the joint part.

6. The lock cylinder structure for preventing technical unlocking according to any one of claims 1 to 5, wherein: the lock shell is characterized in that a cover body is arranged at one end, located on the inner side, of the lock shell, the first elastic body is a first spring, one end of the first spring abuts against the inner side wall of the cover body, and the other end of the first spring abuts against the end face of the joint portion.

7. The lock cylinder structure for preventing technical unlocking according to claim 6, characterized in that: the end face of one end, close to the first spring, of the joint part is provided with a limiting part protruding outwards in the axial direction, and the first spring is sleeved on the outer side of the limiting part.

8. The lock cylinder structure for preventing technical unlocking according to claim 7, characterized in that: the cover body is provided with an opening which axially penetrates through the cover body along the key hole, and the first spring surrounds the opening.

9. The lock cylinder structure for preventing technical unlocking according to any one of claims 1 to 5, wherein: the containing hole is provided with a convex first boss on the inner wall of one end of the outer side, the containing hole is provided with a convex limiting part on the inner wall of one end of the inner side, and the first boss and the limiting part are respectively abutted to the end faces of the two ends of the outer lock cylinder.

10. The lock cylinder structure for preventing technical unlocking according to any one of claims 1 to 5, wherein: the bullet assemblies are positioned on the same straight line axially parallel to the key hole, and the bullet assemblies positioned on the same straight line form a group; the key hole is in a straight shape, and a group of corresponding bullet components is arranged; or the key hole is of a two-sided type, and two groups of corresponding bullet components are arranged; or the key hole is three-sided, and three groups of corresponding elastic component are arranged; or the key hole is of a four-side shape, and four groups of corresponding spring assemblies are arranged; or the key hole is of a multi-surface type with more than four surfaces, and the bullet components are correspondingly provided with more than four groups.

Technical Field

The invention relates to the technical field of mechanical locks, in particular to a lock core structure for preventing technical unlocking.

Background

Mechanical locks are common locks in daily life, and the mechanical locks are various, wherein the cylinder mechanical locks are the most common. The mechanical lock is unlocked by utilizing the transmission of a mechanical structure, the machining precision of the mechanical lock is limited, and machining errors are inevitable, and the technical unlocking just utilizes the machining errors that the lock cylinder can rotate at a certain angle relative to the axial direction, so that the marble is shifted to a proper position to realize unlocking. No matter how the processing precision is further improved, the technical unlocking can not be effectively prevented all the time.

Disclosure of Invention

The invention provides a lock cylinder structure for preventing technical unlocking, which can effectively prevent technical unlocking.

The embodiment of the invention provides a lock core structure for preventing technical unlocking, which comprises a lock shell, an outer lock liner and an inner lock liner; the lock shell is provided with a containing hole, and the outer lock liner is rotatably arranged in the containing hole; the outer lock cylinder is provided with a mounting hole, the inner lock cylinder comprises a joint part and an engagement part, the joint part is arranged in the mounting hole, the joint part can axially move relative to the outer lock cylinder, and the joint part and the outer lock cylinder are linked in the direction of rotating around the axial direction; the accommodating hole is provided with an engaging position, and an engaging piece is arranged at the engaging position; the lock comprises an inner lock liner, a lock shell and a plurality of pin tumbler channels, wherein the inner lock liner is provided with a key hole, the lock shell is internally provided with a plurality of pin tumbler channels communicated with the key hole along the axial direction, the pin tumbler channels are internally provided with pin tumbler assemblies and consist of a first pin tumbler hole penetrating through the inner lock liner, a second pin tumbler hole penetrating through the outer lock liner and a pin tumbler groove arranged on the inner wall of a containing hole; the accommodating hole is provided with a first elastic piece, and the first elastic piece applies thrust to the inner lock cylinder along the axial direction so as to enable the engagement part to move to the engagement position and keep the engagement state with the engagement piece; in the meshing state, the first pin hole, the second pin hole and the pin groove are coaxially arranged, and the meshing part limits the inner lock cylinder to rotate relative to the lock shell but does not limit the inner lock cylinder to axially move relative to the outer lock cylinder; the projectile assembly satisfies a first condition: the spring assembly releases the restriction of the rotation of the outer cylinder with respect to the housing only when the unlocking key is inserted into the key hole, and releases the restriction of the axial movement of the inner cylinder with respect to the outer cylinder when the unlocking key is inserted into the key hole.

Preferably, the ball group component comprises a first ball, a plurality of ball blades, a second ball, a third ball and a second elastic element which are arranged in sequence along the direction far away from the key hole.

Preferably, when the engaging portion is in an engaged state with the engaging member and the key is not inserted into the key hole, the bullet assembly satisfies a second condition: the spring piece is positioned at the dividing position of the inner lock container and the outer lock container; or all the marble pieces are positioned in the first marble hole and the second marble does not extend into the first marble hole; or all the marble pieces are positioned in the second marble hole and the first marble does not extend into the second marble hole.

Preferably, the engaging part is disc-shaped and has a notch, the accommodating hole is provided with a ring opening matched with the engaging part, the engaging position is located on the inner wall of the ring opening, and the engaging part is a clamping block filling the notch.

Preferably, the joint portion has a polygonal cross-sectional shape, and the mounting hole has a polygonal shape matching the joint portion.

Preferably, one end of the lock shell, which is located at the inner side, is provided with a cover body, the first elastic body is a first spring, one end of the first spring abuts against the inner side wall of the cover body, and the other end of the first spring abuts against the end face of the joint part.

Preferably, the end face of the joint part, which is close to one end of the first spring, is provided with a limiting part which protrudes outwards in the axial direction, and the first spring is sleeved on the outer side of the limiting part.

Preferably, the cover body is provided with an opening which axially penetrates through the cover body along the key hole, and the first spring surrounds the opening.

Preferably, the inner wall of the end of the accommodating hole on the outer side is provided with a convex first boss, the inner wall of the end of the accommodating hole on the inner side is provided with a convex limiting part, and the first boss and the limiting part are respectively abutted against the end faces at the two ends of the outer lock cylinder.

Preferably, the bullet components are positioned on the same straight line axially parallel to the key hole, and the bullet components positioned on the same straight line form a group; the key hole is in a straight shape, and a group of corresponding bullet components is arranged; or the key hole is of a two-sided type, and two groups of corresponding bullet components are arranged; or the key hole is three-sided, and three groups of corresponding elastic component are arranged; or the key hole is of a four-side shape, and four groups of corresponding spring assemblies are arranged; or the key hole is of a multi-surface type with more than four surfaces, and the bullet components are correspondingly provided with more than four groups.

Preferably, the opening of the containing hole at the outermost side of the inner lock cylinder is a circular hole, a cylindrical rotating part is arranged at one end, located at the outer side, of the inner lock cylinder, and the rotating part is arranged in the circular hole.

Preferably, the rotating portion, the engaging portion, the combining portion and the stopper portion are sequentially arranged in an insertion direction of the key.

Preferably, the bullet piece is provided with 5 pieces.

The invention has the following technical effects: according to the invention, the engagement structure is arranged in the lock shell, and when the engagement part is engaged with the engagement element, the inner lock liner and the outer lock liner cannot rotate relative to the lock shell, so that the marble cannot be debugged, and technical unlocking cannot be carried out. Only when the unlocking key is inserted into the keyhole, the elastic component removes the limitation of the rotation of the outer lock cylinder relative to the lock shell and removes the limitation of the axial movement of the inner lock cylinder relative to the outer lock cylinder, a user can push the inner lock cylinder to separate the meshing part from the meshing part, so that the limitation of the rotation of the outer lock cylinder relative to the lock shell by the meshing part is removed, the inner lock cylinder and the outer lock cylinder can rotate relative to the lock shell, and then the unlocking can be realized. Therefore, the invention can effectively prevent technical unlocking and greatly improve the safety of the lock core.

Drawings

FIG. 1 is a cross-sectional view of a lock cylinder arrangement of an unassembled cartridge assembly to prevent technical unlocking in accordance with one embodiment of the present invention;

FIG. 2 is a schematic view of a lock housing according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an outer lock cylinder according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of an inner lock cylinder according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a lock cylinder structure of one embodiment of the present invention preventing technical unlocking when an engaging portion and an engaging piece are engaged;

FIG. 6 is a cross-sectional view of a lock cylinder structure of one embodiment of the present invention preventing technical unlocking when the engagement portion and the engagement piece are separated;

fig. 7 is a cross-sectional view of a lock cylinder structure for preventing a technical unlocking according to an embodiment of the present invention, when a non-unlocking key is inserted.

Wherein the reference numerals are: the lock shell 1, a pin groove 10, an engaging piece 11, a first elastic piece 12, a ring opening 13, a first boss 14, a second boss 15, a containing hole 100, an outer lock liner 2, a second pin hole 20, a mounting hole 200, an inner lock liner 3, a first pin hole 30, a combining part 31, an engaging part 32, a limiting part 33, a rotating part 34, a key hole 300, a notch 321, a first pin 41, a pin sheet 42, a second pin 43, a third pin 44, a second elastic piece 45, a cover body 5, a limiting part 51 and an opening 52.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.

The embodiment of the invention provides a lock core structure for preventing technical unlocking, which comprises a lock shell 1, an outer lock core 2 and an inner lock core 3, wherein the lock shell 1 is generally cylindrical, and when the lock core structure is used, the lock shell 1 is arranged in a lock core hole reserved in a door, so that the position of the lock shell 1 is fixed and cannot rotate or move along the axial direction relative to the door. The lock shell 1 is provided with a containing hole 100, the containing hole 100 can axially penetrate through the lock shell 1, the outer lock liner 2 is rotatably arranged in the containing hole 100, under the condition that no marble is considered, the outer lock liner 2 can freely rotate relative to the lock shell 1, and the outer lock liner 2 does not axially move along the lock shell 1. The outer lock core 2 is internally provided with a mounting hole 200, and the mounting hole 200 axially penetrates through the outer lock core 2. The inner cylinder 3 includes a joint portion 31 and an engaging portion 32, the joint portion 31 and the engaging portion 32 may be located at different positions in the axial direction, and the joint portion 31 and the engaging portion 32 may be connected to each other. The joint part 31 is arranged in the mounting hole 200, the engaging part 32 is positioned outside the mounting hole 200, and the structure of the mounting hole 200 and the joint part 31 satisfies that: the joint portion 31 is axially movable relative to the outer cylinder 2, and the joint portion 31 and the outer cylinder 2 are linked in a direction of rotating around the axial direction. That is, when the inner cylinder 3 is rotated relative to the lock case 1, the outer cylinder 2 is rotated together with the inner cylinder 3.

The accommodation hole 100 has therein an engagement position where the engagement member 11 is provided, and the engagement member 11 is adapted to be engaged with the engagement portion 32. The center of the inner cylinder 3 is provided with a key hole 300 for inserting a key. A plurality of marble channels communicated with the key hole 300 are distributed in the lock shell 1 along the axial direction of the key hole 300, an marble assembly is arranged in each marble channel, each marble assembly comprises a plurality of marbles, each marble channel sequentially penetrates through the inner lock liner 3 and the outer lock liner 2 from the key hole 300 and extends to the inner wall of the lock shell 1, and each marble channel is specifically composed of a first marble hole 30 penetrating through the inner lock liner 3, a second marble hole 20 penetrating through the outer lock liner 2 and a marble groove 10 arranged on the inner wall of the accommodating hole 100. In fig. 2, an exemplary pin groove 10 is shown, and one end of the pin groove 10 near the outer surface of the lock case 1 should be closed to accommodate a pin assembly, which functions to limit the movement of the cylinder. The first ball hole 30, the second ball hole 20 and the ball groove 10 constituting the ball passage are arranged in parallel and coaxially in some states, and the radii of the first ball hole 30, the second ball hole 20 and the ball groove 10 are the same so that the ball assembly moves in the ball passage.

The first elastic member 12 is provided in the accommodation hole 100, and the first elastic member 12 applies a pushing force to the inner cylinder 3 in the axial direction, so that the engagement portion 32 is held at the engagement position, and the engagement portion 32 is held in an engaged state with the engagement member 11. As shown in fig. 5, when the engaging portion 32 is engaged with the engaging member 11, the first pin hole 30, the second pin hole 20 and the pin groove 10 are coaxially arranged, and at this time, the engaging member 11 restricts the inner cylinder 3 from rotating relative to the lock case 1, and unlocking cannot be achieved, but the engaging member 11 does not restrict the inner cylinder 3 from moving axially relative to the outer cylinder 2. When the inner lock core 3 is pushed axially inwards to overcome the elastic force of the first elastic member 12 and the spring assembly does not limit the axial movement of the inner lock core 3 relative to the outer lock core 2, the engaging portion 32 and the engaging member 11 are separated from each other, and the engaging member 11 does not affect the rotation of the inner lock core 3 relative to the lock case 1.

When a key is not inserted, the whole lock core is in a locking state, the outer lock cylinder 2 is necessarily limited to rotate relative to the lock shell 1 by the pin tumbler assembly, the inner lock cylinder 3 can be limited to move axially relative to the outer lock cylinder 2 by the pin tumbler assembly, meanwhile, due to the action of the first elastic piece 12, the meshing part 32 and the meshing piece 11 are in a meshing state, and the meshing piece 11 is limited to rotate relative to the lock shell 1 by the inner lock cylinder 3. The bullet assembly satisfies the following first condition: only when an unlocking key is inserted into the key hole 300, the spring assembly releases the limitation of the rotation of the outer lock cylinder 2 relative to the lock shell 1, when no key is inserted into the key hole 300 or a non-unlocking key is inserted into the key hole 300, the spring assembly can not release the limitation of the rotation of the outer lock cylinder 2 relative to the lock shell 1, and the outer lock cylinder 2 and the inner lock cylinder 3 can not rotate relative to the lock shell 1, so that the unlocking can not be realized; meanwhile, when the unlocking key is inserted into the key hole 300, the pin assembly releases the restriction of the movement of the inner cylinder 3 in the axial direction with respect to the outer cylinder 2, as shown in fig. 5, and when the unlocking key is inserted, the pin assembly releases the restriction of the rotation of the outer cylinder 2 with respect to the lock case 1, and the pin assembly releases the restriction of the movement of the inner cylinder 3 in the axial direction with respect to the outer cylinder 2.

After the unlocking key is inserted into the key hole 300, as shown in fig. 6, the user may push the unlocking key inward in the axial direction so that the engagement portion 32 and the engagement member 11 are separated from each other, at which time the spring assembly releases the restriction of the rotation of the outer cylinder 2 relative to the lock case 1 and the engagement member 11 also releases the restriction of the rotation of the inner cylinder 3 relative to the lock case 1, and the inner cylinder 3 and the outer cylinder 2 may rotate relative to the lock case 1. The user can rotate the unlocking key, so that the inner lock liner 3 and the outer lock liner 2 rotate relative to the lock shell 1 to realize unlocking. When the key is withdrawn from the keyhole 300, the first elastic member 12 applies a pushing force to the inner cylinder 3, so that the engaging portion 32 returns to the engaging position, and the engaging portion 32 and the engaging member 11 continue to maintain the engaged state, waiting for the next unlocking. When the engagement portion 32 and the engagement member 11 are engaged, the inner cylinder 3 and the outer cylinder 2 cannot rotate relative to the lock case 1, and thus the technical unlocking cannot be performed by adjusting the pins.

It should be noted that, a transmission structure which is in transmission with the lock tongue is arranged on the inner lock container 3 or the outer lock container 2, when the inner lock container 3 and the outer lock container 2 rotate relative to the lock case 1, the transmission structure drives the lock tongue to act, and unlocking can be achieved. This is a conventional structure of the lock core and will not be described herein.

In one embodiment, the pin tumbler assembly comprises a first pin 41, a plurality of pin tumblers 42, a second pin 43, a third pin 44 and a second resilient member 45 arranged in series in a direction away from the keyway 300. The first pin 41 mainly moves in the first pin hole 30, and in some cases, the first pin 41 may extend into the second pin hole 20, the second pin 43 mainly moves in the second pin hole 20, and in some cases, the second pin 43 may extend into the first pin hole 30 or the pin slot 10, and the third pin 44 mainly moves in the pin slot 10, and in some cases, the third pin 44 may extend into the second pin hole 20. The second elastic member 45 applies an elastic force, which may be a spring, to the third pins 44. When an unlocking key is inserted into the keyhole 300, the second pin 43 is located in the second pin hole 20, and the third pin 44 is located in the pin slot 10, if the engaging portion 32 is separated from the engaging member 11, the outer cylinder 2 can rotate relative to the lock case 1, so as to unlock the lock.

Since the thickness of the spring plate 42 is very thin, when the spring plate 42 is located at the boundary position between the inner cylinder 3 and the outer cylinder 2, the inner cylinder 3 can still move axially relative to the outer cylinder 2 under the axial force, and the engagement state between the engagement portion 32 and the engagement member 11 can be released. Therefore, as shown in fig. 7, when a part of the non-unlocking key is inserted into the keyhole 300, as long as the pin piece 42 is still located at the boundary position between the inner cylinder 3 and the outer cylinder 2, the inner cylinder 3 can be pushed inwards, at this time, because of the non-unlocking key, the second pin 43 or the third pin 44 will limit the outer cylinder 2 to rotate relative to the lock case 1, the inner cylinder 3 cannot be rotated, and the first pin hole 30 and the second pin hole 20 are dislocated, so that the second pin 43 and the third pin 44 cannot be adjusted through technical unlocking, and the difficulty of technical unlocking is further increased.

The number of the bullet pieces 42 can be multiple, for example, 5 bullet pieces are provided, the number of the bullet assemblies is also multiple, for example, 8 bullet pieces in the figure, and multiple combinations are formed by multiple bullet pieces 42 of the bullet assemblies, so that the difficulty of technical unlocking is increased.

The present invention provides an embodiment such that the pin will not block relative axial movement between the inner cylinder 3 and the outer cylinder 2 after a partially non-unlocking key is inserted into the keyway 300 or after a key is not inserted. Specifically, when the engaging portion 32 is in the engaged state with the engaging member 11 and the key is not inserted into the key hole 300, the bullet assembly satisfies the second condition: the spring piece is positioned at the boundary position of the inner lock container 3 and the outer lock container 2; alternatively, all of the ball tabs 42 are located in the first ball holes 30 and the second ball 43 does not extend into the first ball holes 30; alternatively, all of ball segments 42 are located in second ball aperture 20 and first ball 41 does not extend into second ball aperture 20. In the above three cases, the first pin 41 and the second pin 43 do not go beyond the boundary position between the inner cylinder 3 and the outer cylinder 2, and do not block the relative axial movement between the inner cylinder 3 and the outer cylinder 2, while the thickness of the pin piece 42 is very thin and does not block the relative axial movement between the inner cylinder 3 and the outer cylinder 2.

The inner cylinder 3 can be pushed directly axially so that the engagement portion 32 and the engagement member 11 are separated from each other, but the cylinder assembly restricts relative rotation between the outer cylinder 2 and the lock case 1 due to the absence of the insertion of an unlocking key, and unlocking cannot be achieved. The meaning of this embodiment lies in, when not inserting the key or having inserted non-unlocking key, inner lock courage 3 also can be relative outer lock courage 2 along axial displacement, nevertheless can't rotate inner lock courage 3 and unblank, and this makes the opening of tool to lock more have stealthy and puzzlement nature, has further increased the degree of difficulty that the technique unblanked.

In one embodiment, as shown in fig. 1-4, the engaging portion 32 is disc-shaped and has a notch 321, such that the engaging portion 32 is segment-shaped, and a collar 13 matching with the engaging portion 32 is disposed in the receiving hole 100, and the radius of the collar 13 may be smaller than that of the receiving hole 100, such that the inner wall of the collar 13 is adjacent to the inner lock container 3, and the radius of the collar 13 may be slightly larger than that of the engaging portion 32. The engaging position is located on the inner wall of the ring opening 13, and the engaging member 11 is a block filling the gap 321 of the engaging portion 32. Therefore, the engaging portion 32 can be moved axially to the engaging position, and the engaging member 11 will be inserted into the notch 321, so that the engaging portion 32 and the engaging member 11 are engaged, and the inner cylinder 3 cannot rotate relative to the lock case 1.

In one embodiment, the joint 31 has a polygonal cross-sectional shape, and the mounting hole 200 has a polygonal shape matching the joint 31. As shown in fig. 3 and 4, the joint portion 31 and the mounting hole 200 are regular octagons that are matched with each other, so that the inner cylinder 3 can move axially relative to the outer cylinder 2, but the inner cylinder 3 cannot rotate relative to the outer cylinder 2, that is, the inner cylinder 3 and the outer cylinder 2 are linked in a direction of rotating around the axis.

The traditional lock core is of a cylindrical structure, and the end faces of the pins are required to be spherical surfaces or large-size chamfers, so that the adjacent pins can be separated on the outer surface of the lock core when the lock core rotates. Due to the structure of the marble, the contact area between two adjacent marbles is small, and the situation that the two adjacent marbles are not in place in contact easily occurs in the moving process of the lock cylinder, so that the marbles cannot be moved to a specified position, and the fault-tolerant rate is high due to the structure. The first pin hole 20 of the present embodiment is located on the plane of the multi-surface structure of the joint portion 31, so that the separating surfaces of the inner cylinder 3 and the outer cylinder 2 are multiple planes, the end surface of the pin can also be a plane, and when the end surface of the pin and the separating surfaces of the inner cylinder 3 and the outer cylinder 2 are located on the same plane, the inner cylinder 3 and the outer cylinder 2 can move relatively. Therefore, the contact surface between two adjacent marbles is a plane, the contact area is larger, the condition of not-in-place contact is not easy to occur in the relative movement process of the lock cylinder, the marbles can be accurately moved to the designated position, and the precision of the lock is improved.

In one embodiment, the cover 5 is disposed at one end of the lock case 1 located at the inner side (the key hole 300 needs to form an opening on the end surface of the inner lock cylinder 3 for inserting a key, where the one end of the inner side is the end far away from the key hole 300 in the key insertion direction and forms an opening on the end surface of the inner lock cylinder 3), the first elastic body 12 is a first spring, one end of the first spring abuts against the inner side wall of the cover 5, the other end abuts against the end surface of the joint portion 31, and the first spring continuously provides pushing force to the inner lock cylinder 3.

The lid 5 sets up to be connected with lock shell 1 is detachable to be convenient for install parts such as inner lock courage 3, outer lock courage 2 and bullet subassembly, also be convenient for maintain parts such as change inner lock courage 3, outer lock courage 2 and bullet subassembly. For example, the cover 5 may be screwed to the housing 1.

In one embodiment, an end surface of the joint portion 31 near one end of the first spring is provided with a limiting portion 33 protruding outward in the axial direction, and the first spring is sleeved outside the limiting portion 33. The first spring is restrained by the restraining portion 33, and is prevented from coming out of contact with the joint portion 31.

In one embodiment, the cover 5 is provided with a hole 52 penetrating the cover 5 in the axial direction of the key hole 300, and the first spring surrounds the hole 52. The transmission structure connected with the lock tongue on the door body can be connected with the limiting part 33 of the inner lock cylinder 3 through the opening 52, so that unlocking is realized when the inner lock cylinder 3 rotates.

In one embodiment, the inner wall of the end of the receiving hole 100 located on the outside (the key hole 300 needs to be opened at the end face of the inner cylinder 3, where the outside end refers to the end of the key hole 300 that is opened at the end face of the inner cylinder 3 in the key insertion direction) is provided with a protruding first boss 14, and the inner wall of the first boss 14 forms the above-mentioned collar 13. A protruding limiting piece 51 is arranged on the inner wall of one end (the end close to the cover body 5) of the containing hole 100 positioned at the inner side, and the first boss 14 and the limiting piece 51 are respectively abutted against the end faces of the two ends of the outer lock core 2 to limit the outer lock core 2 to move along the axial direction relative to the lock shell 1.

Specifically, a limiting hole may be radially formed in the lock case 1, the limiting hole is communicated with the accommodating hole 100, and the limiting member 51 is a bolt disposed in the limiting hole. The limiting hole may also be a threaded hole, and the limiting member 51 may be a corresponding screw or bolt. An annular groove may be further formed in the inner wall of the accommodating hole 100, and the limiting member 51 is a snap spring disposed in the annular groove.

In one embodiment, the opening of the containing hole 100 at the outermost side of the inner lock cylinder is a circular hole, one end of the inner lock cylinder 3 at the outer side is provided with a cylindrical rotating part 34, the radius of the rotating part 34 is matched with that of the circular hole, and the rotating part 34 is arranged in the circular hole, so that the inner lock cylinder 3 can rotate relative to the lock shell 1 conveniently. Specifically, the second boss 15 can be arranged at the opening position, a circular hole is formed in the center of the second boss 15, the second boss 15 has the effect similar to a bearing seat, the rotating part 34 is supported, and the inner lock cylinder 3 is convenient to rotate. And the second boss 15 can hide the engaging piece 11 inside, so that the engaging structure of the engaging piece 11 and the engaging part 32 cannot be damaged, and the safety of the lock is further improved.

In one embodiment, as shown in fig. 4, the rotating portion 34, the engaging portion 32, the combining portion 31 and the limiting portion 33 are sequentially arranged along the insertion direction of the key 300, and the rotating portion 34, the engaging portion 32, the combining portion 31 and the limiting portion 33 are integrally connected, so that the overall structural strength is higher.

In one embodiment, the pin assemblies are in a line axially parallel to the keyway 300, and the pin assemblies in the line form a group, as shown in FIG. 1, which shows two groups of pin assemblies. The key hole 300 is in a straight shape, and a group of corresponding bullet components are arranged; or the keyhole 300 is of a two-sided type, and two groups of corresponding bullet components are arranged; or, the key hole 300 is three-sided, and three groups of corresponding elastic components are arranged; or the key hole 300 is of a four-sided type, and four groups of corresponding spring assemblies are arranged; alternatively, the keyhole 300 is a polygonal type with four or more sides, and four or more sets of spring assemblies are provided correspondingly. As shown in fig. 4, the present invention provides an embodiment in which the keyhole 300 is cross-shaped, and four sets of corresponding spring assemblies are provided and distributed on the circumferential surface of the outer cylinder 2.

The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. It will be apparent to those skilled in the art that a number of simple derivations or substitutions can be made without departing from the inventive concept.