Safety lock cylinder and key thereof

Abstract

The utility model discloses a safety lock cylinder which comprises an inner cylinder, a cylinder sleeve and at least two lock wheels. The inner core is sleeved in the core sleeve and can rotate in the core sleeve for unlocking; the lock wheels are arranged in the inner core in parallel in a sleeved mode and can rotate in the inner core for unlocking. According to the key, the cross section of one end, extending into the lock cylinder, of the key is arc-shaped so as to correspond to the arc-shaped key hole of the lock wheel; and lock teeth corresponding to the rotation angle of the unlocking opening of the lock wheel are arranged on the opening edge of one side, corresponding to the unlocking opening of the lock wheel, of one end, extending into the lock cylinder, of the key. The anti-theft lock is good in anti-theft performance and simple in structure.

Description

Technical Field

[0001] The utility model relates to a safety lock core, and also relates to a key for opening the lock core. Background Art

[0002] For the current pin tumbler lock in use, its lock core structure generally includes an inner core and an outer core. The inner core is provided with a pin channel and a keyhole, and the pin channel is communicated with the keyhole. After the pins enter the pin channel, the pins are extended into the keyhole by the spring expansion. When the key is inserted into or pulled out of the keyhole, the pins are squeezed or the pins return to their original positions by the key teeth to unlock or lock the lock.

[0003] Since the pins extend into the keyhole, it is possible to use a wire or a steel needle to push the pins back into the pin channel of the inner core to unlock the lock, that is, the lock can be opened even without a key, resulting in poor anti-theft performance and insecurity. Moreover, since the pins enter the pin channel and then are extended into the keyhole by the spring expansion, there are many components, the structure is complex, and the production cost is high. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a safety lock core with good anti-theft performance and simple structure to overcome the above-mentioned defects of the prior art. At the same time, a key for opening the lock core is also provided.

[0005] To solve the above technical problem, the safety lock core of the utility model includes an inner core, a core sleeve and at least two lock wheels; the inner core is sleeved in the core sleeve and can rotate in the core sleeve to unlock; the lock wheels are arranged in parallel and sleeved in the inner core and can rotate in the inner core to unlock;

[0006] The core sleeve is fixedly connected to the lock housing; an end cover is provided at the outer end of the core sleeve, and a key insertion hole is provided in the middle of the end cover;

[0007] The inner core is in transmission connection with the lock tongue; a key piece seat groove is provided on the inner wall of the inner core; a spring and an unlocking key piece are provided in the key piece seat groove, and the unlocking key piece is elastically connected to the bottom of the key piece seat groove through the spring;

[0008] An arc-shaped keyhole is provided in the middle of the lock wheel; an unlocking opening is provided on the outer edge of the lock wheel; the unlocking openings of each lock wheel are arranged staggeredly and are staggered at a certain angle from each other, so that the key rotates forward to drive the lock wheels to rotate successively, making the unlocking openings all align with the key piece seat groove of the inner core to clamp the unlocking key piece, and driving the inner core to rotate forward to realize unlocking; the unlocking opening of the lock wheel is a one-way opening, so that the key drives the inner core to rotate in a predetermined direction and cannot rotate in the reverse direction.

[0009] The outer edge of the locking wheel is also provided with an anti-locking opening; the anti-locking opening of the locking wheel is a one-way opening, so that the key drives the inner core to rotate in a predetermined direction and cannot rotate in the reverse direction; the opening directions of the unlocking opening and the anti-locking opening are opposite; an anti-locking key seat groove corresponding to the locking wheel is also provided on the inner wall of the inner core; a spring and an anti-locking key are arranged in the anti-locking key seat groove, and the anti-locking key is elastically connected to the bottom of the seat groove through the spring; the positions of the anti-locking openings of the locking wheels are set to be consistent, so that the anti-locking key can be caught by reversing the locking wheel to align the anti-locking opening with the anti-locking key seat groove of the inner core, driving the inner core to reverse to achieve anti-locking.

[0010] The number of the locking wheels is 3-8.

[0011] The key hole of the locking wheel is semi-circular arc-shaped.

[0012] A key for opening the safety lock of the present invention, the cross-section of one end of the key extending into the lock core is circular arc-shaped to correspond to the circular arc-shaped key hole of the locking wheel; on the side edge corresponding to the unlocking opening of the locking wheel at one end of the key extending into the lock core, there are lock teeth corresponding to the rotation angle of the unlocking opening of the locking wheel, so that the key can drive the locking wheels to rotate successively in sequence to align their unlocking openings with the key piece seat groove of the inner core to catch the unlocking key piece, driving the inner core to rotate to achieve unlocking.

[0013] The cross-section of one end of the key extending into the lock core is semi-circular arc-shaped.

[0014] The set angles of the unlocking openings of the locking wheels are equal to the sum of the set angles of the corresponding key lock teeth.

[0015] Adopting the structure of the present invention, since the lock core includes an inner core, a core sleeve and at least two locking wheels, the locking wheels are arranged in parallel and sleeved in the inner core and can rotate in the inner core to unlock. The inner wall of the inner core is provided with a key piece seat groove, a spring and an unlocking key piece are arranged in the key piece seat groove, the middle of the locking wheel is provided with a circular arc-shaped key hole, the outer edge of the locking wheel is provided with an unlocking opening, and the unlocking openings of the locking wheels are staggered from each other at a certain angle. By rotating the locking wheels successively in sequence by the forward rotation of the key to align the unlocking openings with the key piece seat groove of the inner core, the unlocking key piece passes through the key piece groove of the inner core and extends into the unlocking opening, and the unlocking opening catches the unlocking key piece, which can drive the inner core to rotate forward to achieve unlocking; if the unlocking opening of one locking wheel is not aligned with the key piece groove of the inner core, the unlocking key piece cannot extend out of the key piece seat groove of the inner core, the unlocking opening of the locking wheel cannot catch the key piece, and the inner core cannot be driven to rotate forward to achieve unlocking; because the key only contacts the locking wheel and does not contact the key piece, that is, if a non-matching key is not used, the unlocking key piece cannot be contacted and unlocked from the key hole, so it is not easily stolen and has great safety. The more the number of locking wheels, the higher the safety.

[0016] The key component locking wheel of the present invention has a simple structure, but has extremely strong concealment. The angle of the unlocking opening of each locking wheel cannot be known by simple mechanical means, so it cannot be unlocked without a matching key.

[0017] Since an anti-lock notch is also provided on the outer edge of the lock wheel, an anti-lock key seat groove corresponding to the lock wheel is further provided on the inner wall of the inner core. A spring and an anti-lock key are arranged in the anti-lock key seat groove. The anti-lock key is elastically connected to the bottom of the seat groove through the spring. The positions of the anti-lock notches of the lock wheels are set to be consistent. By reversing the lock wheel with the key, the anti-lock notch can be aligned with the anti-lock key seat groove of the inner core to catch the anti-lock key, driving the inner core to reverse to achieve anti-lock.

[0018] In order to smoothly achieve unlocking and anti-lock, the unlocking notch and the anti-lock notch of the lock wheel are unidirectional openings, and the opening directions of the unlocking notch and the anti-lock notch are opposite. In this way, the key can only drive the inner core to rotate in a predetermined direction and cannot rotate in the reverse direction. If you want to unlock, you can only drive the inner core to rotate forward to achieve unlocking. If you want to anti-lock, you can only drive the inner core to rotate in reverse to achieve anti-lock.

[0019] The lock core of the present utility model has a simple structure, but has strong safety and good anti-theft performance.

[0020] For the key of the present utility model, since the cross-section of the end extending into the lock core is arc-shaped to correspond to the arc-shaped keyhole of the lock wheel, a lock tooth corresponding to the rotation angle of the unlocking notch of the lock wheel is provided on the edge of the side of the end of the key extending into the lock core corresponding to the lock wheel. When the key can drive two or more lock wheels to rotate successively in sequence so that their unlocking notches are all aligned with the key piece seat groove of the inner core, the unlocking key piece extends out of the key piece groove of the inner core and extends into the unlocking notch, and the unlocking notch catches the unlocking key piece, thereby driving the inner core to rotate to achieve unlocking. After unlocking, the key can be withdrawn.

[0021] The key of the present utility model has a simple structure, but has strong safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the safety lock core of the present utility model;

[0023] Figure 2 is Figure 1 a cross-sectional view along A-A;

[0024] Figure 3 is a schematic structural diagram of the key of the present utility model;

[0025] Figure 4 is Figure 3 a cross-sectional view along B-B;

[0026] Figure 5 is a schematic diagram of the method for determining the position of the unlocking notch of the lock wheel recommended by the present utility model. DETAILED DESCRIPTION OF THE INVENTION

[0027] The present utility model will be described in detail below in conjunction with the drawings and the specific embodiments:

[0028] Such as Figure 1 、 Figure 2 、Figure 3 , Figure 4 As shown, the utility model includes a safety lock core and a key.

[0029] The safety lock core comprises an inner core 1, a core sleeve 6 and at least two locking wheels 3. The inner core is sleeved in the core sleeve and can be rotated in the core sleeve to unlock. The locking wheels are arranged in parallel and sleeved in the inner core and can be rotated in the inner core to unlock. The cross section of the locking wheels is circular, and the locking wheels are arranged in parallel and coaxially.

[0030] The number of locking wheels is preferably 3-8. The more locking wheels there are, the safer it is.

[0031] The core sleeve is fixedly connected to the lock shell. An end cover 7 is arranged at the outer end of the core sleeve, and a key insertion hole 8 is arranged in the middle of the end cover.

[0032] The inner core is in transmission connection with the lock tongue. The inner wall of the inner core is provided with a key plate seat groove. A spring and an unlocking key plate 5 are arranged in the key plate seat groove, and the unlocking key plate is elastically connected to the bottom of the key plate seat groove through the spring.

[0033] The middle part of the lock wheel is provided with an arc-shaped key hole 9. The key hole of the lock wheel is preferably in a semicircular arc shape. The key hole 9 of the lock wheel is concentric with the lock wheel.

[0034] The outer edge of the lock wheel is provided with an unlocking opening 4. The unlocking openings of each lock wheel are staggered and mutually staggered at a certain angle, so that the lock wheels are rotated successively by the forward rotation of the key so that the unlocking openings are aligned with the key seat groove of the inner core to clamp the unlocking key, and the inner core is driven to rotate forward to unlock. The unlocking opening of the lock wheel is a one-way opening, so that the key drives the inner core to rotate in a predetermined direction but not in the opposite direction.

[0035] The cross section of one end of the key 11 extending into the lock core is arc-shaped to correspond to the arc-shaped keyhole of the lock wheel.

[0036] The key is inserted into the lock core at one end, and the edge of the opening corresponding to the lock wheel is provided with a lock tooth 12 corresponding to the rotation angle of the lock wheel's unlocking opening, so that the key can drive the lock wheel to rotate successively so that the unlocking opening is aligned with the key plate seat groove of the inner core to clamp the unlocking key plate, and drive the inner core to rotate to unlock. The lock tooth structure is simple, such as Figure 3 , Figure 4 As shown, it is a short straight side, which is stepped with each other to correspond to the rotation angle of the unlocking opening of the lock wheel, so that each lock wheel rotates successively and finally reaches the unlocking opening while aligning with the key seat groove of the inner core.

[0037] The setting angle of the unlocking opening of each lock wheel is equal to the sum of the setting angles of the corresponding key lock teeth. For example, if the setting angle of the unlocking opening of lock wheel 1 is 90°, the setting angle of the unlocking opening of lock wheel 2 is 95°, and the setting angle of the lock teeth of the corresponding lock wheel 1 is 95°, then the setting angle of the lock teeth of the corresponding lock wheel 2 is 90°.

[0038] On the other side of the end of the key inserted into the lock core, there are no lock teeth along the edge, but a straight edge parallel to the key shaft, which is used to drive the lock wheel to lock in reverse.

[0039] The cross-section of the end of the key inserted into the lock core is preferably semi-circular. In this way, the manufacturing is simpler.

[0040] Considering that some room doors need to be locked in reverse, an anti-lock notch 10 can also be provided on the outer edge of the lock wheel. The anti-lock notch of the lock wheel is a one-way opening, so that the key drives the inner core to rotate in a predetermined direction and cannot rotate in the reverse direction.

[0041] The opening directions of the unlocking notch and the anti-lock notch are opposite. For example, if the opening direction of the unlocking notch is set to the clockwise direction, that is, the clockwise direction is the unlocking direction, then the opening direction of the anti-lock notch is set to the counterclockwise direction. Correspondingly, an anti-lock key seat groove corresponding to the lock wheel is also provided on the inner wall of the inner core. A spring and an anti-lock key 2 are provided in the anti-lock key seat groove, and the anti-lock key is elastically connected to the bottom of the seat groove through the spring. The anti-lock notch positions of each lock wheel are set to be consistent, so that the anti-lock notch is aligned with the anti-lock key seat groove of the inner core by reversing the lock wheel with the key to catch the anti-lock key, driving the inner core to reverse to achieve anti-lock.

[0042] As Figure 5 shown, the present utility model recommends a method for determining the unlocking notch position of the lock wheel. There are 4 lock wheels, E is the anti-lock notch position of the lock wheel, A, B, C, D are the positions of each lock tooth of the key, and each lock tooth corresponds to a lock wheel. Draw lines through the center point O through A, B, C, D and extend them to the edge of the lock wheel to obtain points A1, B1, C1, D1. Take point D1 as the unlocking notch position of the lock wheel corresponding to lock tooth D, then the unlocking notch position of the lock wheel corresponding to lock tooth A is determined as follows: arc D1E - A1E = D1A1, draw an arc D1F with D1 as the center, so that D1F = D1A1, that is, point F is the unlocking notch position of the lock wheel corresponding to lock tooth A; the unlocking notch position of the lock wheel corresponding to lock tooth B is determined as follows: arc D1E - B1E = D1B1, draw an arc D1G with D1 as the center, so that D1G = D1B1, that is, point G is the unlocking notch position of the lock wheel corresponding to lock tooth B; the unlocking notch position of the lock wheel corresponding to lock tooth C is determined as follows: arc D1E - C1E = D1C1, draw an arc D1H with D1 as the center, so that D1H = D1C1, that is, point H is the unlocking notch position of the lock wheel corresponding to lock tooth C. Of course, it can also be set in other ways, as long as the unlocking notches of each lock wheel are staggered and staggered at a certain angle, so that the unlocking notches are all aligned with the key piece seat groove of the inner core by driving the lock wheels to rotate successively in the forward rotation of the key to catch the unlocking key piece, driving the inner core to rotate forward to achieve unlocking.

Claims

1. A safety lock cylinder, characterized in that: It comprises an inner core (1), a core sleeve (6) and at least two locking wheels (3); the inner core is sleeved in the core sleeve and can be rotated in the core sleeve to unlock; the locking wheels are arranged in parallel and sleeved in the inner core and can be rotated in the inner core to unlock; The core sleeve is fixedly connected to the lock shell; an end cover (7) is provided at the outer end of the core sleeve, and a key insertion hole is provided in the middle of the end cover; The inner core is in transmission connection with the lock tongue; the inner wall of the inner core is provided with a key plate seat groove; a spring and an unlocking key plate (5) are provided in the key plate seat groove, and the unlocking key plate is elastically connected to the bottom of the key plate seat groove through the spring; A circular arc key hole (9) is provided in the middle of the lock wheel; an unlocking opening (4) is provided on the outer edge of the lock wheel; the unlocking openings of the lock wheels are staggered and mutually staggered at a certain angle, so that the lock wheels are successively rotated by the forward rotation of the key so that the unlocking openings are aligned with the key seat groove of the inner core to clamp the unlocking key, thereby driving the inner core to rotate forward to achieve unlocking; the unlocking opening of the lock wheel is a one-way opening, so that the key drives the inner core to rotate in a predetermined direction but cannot rotate in the opposite direction.

2. The safety lock core according to claim 1, characterized in that: The outer edge of the lock wheel is also provided with an anti-locking opening (10); the anti-locking opening of the lock wheel is a one-way opening, so that the key can drive the inner core to rotate in a predetermined direction but not in the opposite direction; the opening directions of the unlocking opening and the anti-locking opening are opposite; the inner wall of the inner core is also provided with an anti-locking key seat groove corresponding to the lock wheel; a spring and an anti-locking key (2) are provided in the anti-locking key seat groove, and the anti-locking key is elastically connected to the bottom of the seat groove through the spring; the anti-locking opening positions of each lock wheel are set to be consistent, so that the anti-locking opening is aligned with the anti-locking key seat groove of the inner core by reversing the lock wheel with the key to clamp the anti-locking key, thereby driving the inner core to reverse and realize anti-locking.

3. The safety lock core according to claim 1 or 2, characterized in that: The number of the locking wheels is 3-8.

4. The safety lock core according to claim 1, characterized in that: The key hole of the locking wheel is in a semicircular arc shape.

5. A key for opening the safety lock cylinder according to claim 1, characterized in that: The cross section of one end of the key (11) extending into the lock core is arc-shaped to correspond to the arc-shaped keyhole of the lock wheel; a lock tooth (12) corresponding to the rotation angle of the unlocking opening of the lock wheel is provided on the edge of one side of the end of the key extending into the lock core corresponding to the unlocking opening of the lock wheel, so that the key can drive the lock wheel to rotate successively so that the unlocking opening is aligned with the key plate seat groove of the inner core to clamp the unlocking key plate, thereby driving the inner core to rotate to achieve unlocking.

6. The key according to claim 5, characterized in that: The cross section of one end of the key extending into the lock core is semicircular.

7. The key according to claim 5, characterized in that: The setting angle of each lock wheel unlocking opening is equal to the sum of the setting angles of the corresponding key lock teeth.

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