Lock core, lock and unlocking head

Abstract

The present invention provides a lock core, a lock and an unlocking head, wherein the lock core comprises: a lock body assembly, wherein the lock body assembly comprises a lock core shell and a rotating core, wherein the inner wall of the lock core shell is provided with a limiting groove in the axial direction and a guide groove in the circumferential direction, wherein the limiting groove and the guide groove are intersecting and communicating, wherein the rotating core is rotatably arranged inside the lock core shell, and wherein the rotating core comprises a limiting rod, wherein a limiting block is provided on the side of the limiting rod, and wherein the limiting rod can move in the axial direction relative to the rotating core, and the limiting block is located in the limiting groove or the guide groove; and a leaf spring, wherein the leaf spring has a bending portion, wherein the bending portion abuts against one end of the limiting rod and can generate an elastic force that enables the limiting rod to move in the axial direction relative to the rotating core. The present invention solves the problem that the existing lock core is thick and difficult to be adapted to ultra-thin doors.

Description

Technical Field

[0001] The present invention relates to the technical field of lock cores, and in particular to a lock core, a lock and an unlocking head. Background Art

[0002] Locks are everywhere in people's daily lives, protecting people's lives and property. The core anti-theft part of a lock is the lock core, and the performance of the lock core directly affects the anti-theft performance of the entire lock.

[0003] The length of the lock core is generally fixed. In order to protect the lock core from being damaged and affecting the anti-theft effect, a lock core that matches the thickness of the door is usually selected so that the lock core has a certain thickness from the front and back panels of the door. However, with the development of minimalist style, people tend to make the thickness of various doors thinner so that they occupy less space, which requires a thinner lock core. However, the current lock core is thick and difficult to adapt to ultra-thin doors, which also greatly affects the development of ultra-thin doors. Summary of the invention

[0004] The problem solved by the present invention is that the existing lock core is relatively thick and difficult to be adapted to an ultra-thin door.

[0005] In order to solve the above problems, the present invention provides a lock core, comprising:

[0006] A lock body assembly, the lock body assembly comprising a lock core shell and a rotating core, the inner wall of the lock core shell is provided with a limiting groove along the axial direction and a guide groove along the circumferential direction, the limiting groove and the guide groove are intersected and communicated, the rotating core is rotatably arranged inside the lock core shell, and the rotating core comprises a limiting rod, a limiting block is provided on the side of the limiting rod, and the limiting rod can move in the axial direction relative to the rotating core, and the limiting block is located in the limiting groove or the guide groove;

[0007] The leaf spring has a bent portion, the bent portion abuts against one end of the limit rod and can generate an elastic force that enables the limit rod to move in an axial direction relative to the rotating core.

[0008] Furthermore, an unlocking hole is provided at one end of the lock core shell, and a limiting portion surrounding the unlocking hole is provided at the end of the lock core shell where the unlocking hole is provided, and the limiting portion cooperates with the bending portion to limit the movement of the limiting rod in the axial direction relative to the lock core shell.

[0009] Furthermore, the limiting portion is provided with an unlocking head positioning component, and the unlocking head positioning component includes at least one protrusion and at least one groove, and the protrusion and the groove are used for angular positioning of the unlocking head when it is inserted.

[0010] Furthermore, the rotating core also includes a lock core, which includes an unlocking column and blades arranged around the unlocking column, an unlocking cavity is opened between the blades and the unlocking column, at least two of the blades are arranged axially, and an accommodating cavity for accommodating the limiting rod is formed between any two adjacent blades.

[0011] Furthermore, the limiting rod and the two adjacent blades are slidably arranged, and the circumferential surface of the limiting rod abuts against the side surfaces of the two adjacent blades.

[0012] Furthermore, the limiting rod also includes an unlocking portion and a force-bearing portion, the unlocking portion is arranged in the unlocking hole or in a space where the unlocking hole extends axially toward the interior of the lock core shell, the force-bearing portion is arranged on a side opposite to the unlocking portion and abuts against the bending portion, and the limiting block is arranged on a side surface close to the force-bearing portion.

[0013] Furthermore, the leaf spring is provided with a through hole and at least two bent portions arranged on the circumferential surface surrounding the outer side of the through hole, and the two bent portions are bent toward one side.

[0014] Furthermore, each of the bent portions is in the shape of an arc strip, and a protrusion is formed at one end of the bent portion away from the through hole, and the protrusion is in contact with the limiting rod.

[0015] The present invention also provides a lock comprising the lock core as described in any one of the above items.

[0016] The present invention also provides an unlocking head, which comprises a head portion, an end portion of the head portion is provided with a matching hole and an unlocking portion surrounding the matching hole, and the unlocking portion is circumferentially provided with a protrusion and a recess.

[0017] The invention provides a limit rod with a limit block on the rotating core, and provides an axial limit groove and a circumferential guide groove used in conjunction with the limit block on the inner wall of the lock core shell, and the limit rod is pressed by the unlocking head to make the limit block slide from the axial limit groove into the circumferential guide groove, so that the rotating core can rotate relative to the lock core shell, and a leaf spring with a bent portion is provided, and the bent portion is abutted against one end of the limit rod, and under the action of the restoring elastic force of the leaf spring, the limit rod is pushed to move in the axial direction relative to the rotating core, so that the limit block slides from the circumferential guide groove into the axial limit groove and is embedded in the limit groove, so that the lock core cannot rotate and lock is achieved; the thickness of the leaf spring after compression is relatively low, and after the leaf spring is compressed to the limit position, the thickness of only one spring leaf is left, which greatly reduces the thickness of the spring compared with the use of a spiral spring, can reduce the thickness of the lock core, and thus can realize the manufacture of an ultra-thin lock core; in addition, the entire lock core structure is simple and compact, the assembly of the leaf spring is simple and the cost is low, and the manufacturing cost of the lock core can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an exploded schematic diagram of a lock core in an embodiment of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a lock core housing in an embodiment of the present invention;

[0020] Figure 3 It is a schematic structural diagram of a limit rod in an embodiment of the present invention;

[0021] Figure 4 It is a front view schematic diagram of a leaf spring in an embodiment of the present invention;

[0022] Figure 5 A schematic side view of a leaf spring in an embodiment of the present invention;

[0023] Figure 6 A rear view schematic diagram of a lock core in an embodiment of the present invention;

[0024] Figure 7 When the lock cylinder is in unlocked state, Figure 6 The cross-sectional schematic diagram of the lock core shown in the BB direction;

[0025] Figure 8 When the lock cylinder is in the locked state, Figure 6 The cross-sectional schematic diagram of the lock core shown in the BB direction;

[0026] Fig. 9 It is a schematic front view of an unlocking head in an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1- lock core shell; 2- rotating core; 3- leaf spring; 4- unlocking head; 5- screw;

[0029] 11-unlocking hole; 12-limiting part; 13-guide groove; 14-limiting groove; 21-locking core; 22-limiting rod; 31-through hole; 32-bending part; 41-head; 42-assembly part;

[0030] 121-bump; 211-unlocking column; 212-blade; 213-accommodating cavity; 221-unlocking portion; 222-force bearing portion; 223-limiting block; 321-protrusion; 411-matching hole; 412-unlocking portion;

[0031] 4121- protrusion; 4122- recessed portion. DETAILED DESCRIPTION

[0032] The length of the lock core is generally fixed. In order to protect the lock core from being damaged and affecting its anti-theft effect, the lock core is usually selected to match the thickness of the door. However, with the development of minimalist style, people tend to make the thickness of various doors thinner so that they occupy less space, which requires a thinner lock core. However, the current lock core is thick and difficult to adapt to ultra-thin doors.

[0033] Although there is a method in the prior art to install a coil spring in the lock core and reduce the thickness of the lock core by compressing the spring, even after the coil spring is compressed to the limit, the coil spring still has a certain thickness, and the extent to which the thickness of the lock core can be reduced is limited. There are also certain difficulties in making an ultra-thin lock core.

[0034] In order to solve the above technical problems, an embodiment of the present invention provides a lock core, a lock and an unlocking head. By adopting a leaf spring with a specific structure in the lock core, the thickness of the spring is greatly reduced compared with the spiral spring used in the prior art, and the thickness of the lock core can be reduced, thereby realizing the manufacture of an ultra-thin lock core.

[0035] The technical solutions in the embodiments of the present application will be described clearly and in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, the meaning of "at least one" is one or more than one, unless otherwise clearly and specifically defined.

[0036] In the description of the embodiments of the present application, the term "in some preferred embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one preferred embodiment or preferred example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same implementation or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] Combination Figure 1 As shown, this embodiment provides a lock core, including a lock core assembly and a leaf spring 3, wherein the lock core assembly includes a lock core shell 1 and a rotating core 2.

[0038] Combination Figure 1 and Figure 2As shown, the lock cylinder housing 1 has a front end face (the front end in this application refers to the end for inserting the unlocking head of the key), and an unlocking hole 11 and an annular limiting portion 12 surrounding the unlocking hole 11 are provided on the front end face, and the limiting portion 12 and the side wall of the lock cylinder housing 1 are integrally formed. The rear end of the lock cylinder housing 1 (the rear end in this application refers to the end away from the front end face of the lock cylinder housing 1) is open, and a leaf spring 3 is arranged at the opening. The inner wall of the lock cylinder housing 1 near the opening is provided with a guide groove 13 along the circumferential direction (the circumferential direction in this application refers to the direction around the circumference of the lock cylinder housing 1), and the inner wall of the lock cylinder housing 1 between the guide groove 13 and the limiting portion 12 is provided with a plurality of limiting grooves 14 along the axial direction (the axial direction in this application refers to the direction where the central axis of the lock cylinder housing 1 is located and the direction parallel to the central axis), and the plurality of limiting grooves 14 and the guide groove 13 are intersecting and communicating. The rotating core 2 is rotatably arranged inside the lock cylinder housing 1, and the limiting portion 12 and the leaf spring 3 limit the movement of the rotating core 2 relative to the lock cylinder housing 1 in the axial direction.

[0039] Combination Figure 2 As shown, the limit portion 12 is provided with an unlocking head positioning component, which includes at least one protrusion 121 and at least one groove (not shown in the figure) for angular positioning when the key is inserted. The inner wall of the lock cylinder housing 1 is provided with at least two limiting grooves 14 along the axial direction, and each limiting groove 14 is provided in a one-to-one correspondence with a protrusion 121 or a groove (that is, the position where the limiting groove 14 is provided corresponds to a protrusion 121 or a groove provided on the limit portion 12).

[0040] Combination Figure 1 As shown, the rotating core 2 includes a lock core 21 and a limiting rod 22. The lock core 21 includes an unlocking column 211 and a blade 212 arranged on the circumferential surface around the outer side of the unlocking column 211. An unlocking cavity (not shown in the figure) is opened between the blade 212 and the unlocking column 211. The unlocking head is inserted into the unlocking cavity through the unlocking hole 11 for unlocking. At least two blades 212 are arranged axially, and a receiving cavity 213 for accommodating the limit rod 22 is formed between any two adjacent blades, that is, the limit rod 22 and the blades 212 are arranged around the circumferential surface on the outside of the unlocking column 211; the cross-sectional shape of each blade 212 is similar to a "fan shape", and the two side surfaces of each blade 212 are arc-shaped to form an arc-shaped receiving cavity 213 matching the shape of the limit rod 22, so that it can better match the shape of the limit rod 22, so that the limit rod 22 is slidably set in the receiving cavity 213, and the limit rod 22 can move in the axial direction relative to the blade 212, and the circumferential surface of the limit rod 22 is in contact with the side surface of the blade 212, so that when the limit rod 22 rotates under the action of external force, it can rotate with the lock core 21 to unlock.

[0041] It should be noted that the number of the limit rods 22, blades 212 and limit grooves 14 is not further limited in the present application, and those skilled in the art can set them according to actual needs, as long as the locking function can be better achieved and the unlocking is convenient, but the number of the limit rods 22, blades 212 and limit grooves 14 is not less than two; similarly, the number of the protrusions 121 and grooves that cooperate with the limit rods 22 is not further limited, and the number of the protrusions 121 and grooves is determined according to the number of the limit rods 22, and the number of the protrusions 121 and grooves is not less than one.

[0042] In order to better achieve the locking effect, in some preferred embodiments, the number of the limiting rods 22, the blades 212 and the limiting grooves 14 are all four, and the number of the protrusions 121 and the grooves are all two.

[0043] Combination Figure 3 As shown, the limit rod 22 includes an unlocking portion 221, a force-bearing portion 222 and a limit block 223, wherein the limit block 223 is arranged on the side of the limit rod 22 and is used to limit the position of the limit rod 22; the unlocking portion 221 is used for the unlocking head to press when the unlocking head is inserted into the unlocking cavity. When in use, the unlocking head presses the unlocking portion 221 and pushes the limit block 223 to slide out of the limit groove 14 and slide into the guide groove 13, so that the rotary core 2 can rotate relative to the lock core shell 1 to achieve unlocking; the force-bearing portion 222 is used to abut against the leaf spring 3, so that under the elastic force of the leaf spring 3, the limit rod 22 is pushed to rotate and the limit block 223 moves toward the direction of the limit portion 12, so that the limit block 223 is clamped in the limit groove 14, so that the rotary core 2 cannot rotate, thereby achieving locking.

[0044] Specifically, the unlocking portion 221 is arranged on the front end face of the limiting rod 22, and a part of the unlocking portion 221 is arranged in the unlocking hole 11 or in the space where the unlocking hole 11 extends axially toward the inside of the lock core shell 1 (that is, the space where the unlocking hole 11 extends toward the open end of the lock core shell 1), and the unlocking portion 221 is arranged opposite to the protrusion 121 or the groove, thereby ensuring that when the unlocking head is inserted into the unlocking hole, the unlocking head can contact the limiting rod 22 and form a pressing effect; the force-bearing portion 222 is arranged on the side opposite to the unlocking portion 221, and the force-bearing portion 222 is located in the lock core shell 1, thereby, by arranging both the limiting rod 22 and the lock core 21 in the lock core shell 1, the thickness of the lock core can be further reduced.

[0045] The limit block 223 is arranged on the side of the limit rod 22. The present application does not further limit the specific position of the limit block 223 on the side of the limit rod 22, as long as it can ensure that the limit rod 22 slides out of the limit groove 14 under the push of the unlocking head and slides into the guide groove 13, and under the elastic force of the leaf spring 3, it can slide from the guide groove 13 into the limit groove 14. In order to further reduce the thickness of the lock core and make it suitable for ultra-thin doors, in some preferred embodiments, the limit block 223 is arranged on the side close to the force-bearing part 222, and the rear end face of the limit block 223 is arranged flush with the force-bearing part 222.

[0046] Combination Figure 4 and Figure 5 As shown, the leaf spring 3 is provided with a through hole 31 and a plurality of bent portions 32 arranged on the circumferential surface surrounding the outer side of the through hole 31 in sequence, forming a shape similar to a "Hot Wheels", wherein the through hole 31 is used to assemble the leaf spring 3 with the lock core shell 1 and the rotating core 2 as a whole, and the plurality of bent portions 32 are all bent toward one side and toward the side close to the limiting portion 12, and each bent portion 32 is in contact with the force-bearing portion 222, thereby, when the unlocking head presses the limiting rod 22, it can push the leaf spring 3 to bend and deform toward the side away from the limiting portion 12, so that in the locked state, a reset elastic force can be generated to push the limiting rod 22 to rotate and move in the axial direction, toward the side close to the limiting portion 12, so that the limiting block 223 moves to the limiting groove 14 and is clamped in the limiting groove 14.

[0047] In some embodiments, the through hole 31 is a threaded hole, and the screw 5 passes through the through hole 31 to assemble the leaf spring, the lock cylinder housing 1 and the rotary core into one body.

[0048] Each bending portion 32 is in the shape of an arc strip, and the head of the bending portion 32 (the head in this application refers to the end close to the through hole 31) is connected to the circumferential surface outside the through hole 31, and the cross-sectional area of ​​the tail of the bending portion 32 (the tail in this application refers to the end away from the through hole 31) is increased to form a protrusion 321, and the cross-sectional shape of the protrusion 321 is similar to a "C" shape. Therefore, the protrusion 321 with a larger cross-sectional area abuts against the force-bearing portion 222 to increase the contact area between the bending portion 32 and the limiting rod 22, so that the limiting rod 22 can be better pushed to move under the action of the reset elastic force. The bending portion 32 is bent toward one side at a preset angle from the head to the tail of the bending portion 32. The preset angle is not further limited in this application. Those skilled in the art can determine it according to the elastic force of the leaf spring 3. For example, the preset angle can be 5 degrees or 10 degrees.

[0049] It should be noted that in the present application, the number of the bending portions 32 is the same as the number of the limiting rods 22, and the number of the bending portions 32 is not less than two. The specific number can be set by technicians in this field according to actual needs.

[0050] The lock core provided in this embodiment can be used in various locks, for example, locks used in the field of industrial anti-error control, power locks, or civil locks.

[0051] Combination Fig. 9 As shown, this embodiment also provides an unlocking head 4, including: a head 41 and an assembly portion 42, a matching hole 411 and an annular unlocking portion 412 surrounding the matching hole 411 are opened at the end of the head 41, the matching hole 411 is arranged at one end away from the assembly portion 42 and extends in the direction of the assembly portion 42, and is used to cooperate with the unlocking column 211, and the unlocking portion 412 is circumferentially provided with protrusions 4121 and recesses 4122, and the number of protrusions 4121 and recesses 4122 is respectively the same as the number of protrusions 121 and recesses 4122, and each protrusion 4121 and recess 4122 is matched with each protrusion 121 and recess 4122 in the unlocking head positioning component of the lock core, and is used to press the limit rod 22 after the unlocking head 4 is inserted into the unlocking hole 11; the assembly portion 42 is used to fix the unlocking head 4 on the key handle.

[0052] In order to better realize the locking function, in some preferred embodiments, the unlocking portion 412 is respectively provided with two protrusions 4121 and two recessed portions 4122 along the circumferential direction, and the protrusion heights of the two protrusions 4121 (the protrusion height in this application refers to the height protruding along the head in the axial direction) and the recessed depths of the two recessed portions 4122 (the recessed depth in this application refers to the depth recessed along the head in the axial direction) are different. Therefore, by setting protrusions 4121 and recessed portions 4122 of different depths, different teeth can be distinguished, which makes it easier for the unlocking head 4 to be accurately inserted into the unlocking hole 11.

[0053] Combine the following Figures 6 to 8 The working principle of the lock core provided in this embodiment is described. Figure 6 This is a rear view of the lock cylinder. Figure 7 and Figure 8 The lock cylinder is in the unlocked state and the locked state. Figure 6 The cross-sectional view of the lock cylinder in the BB direction is shown as follows:

[0054] like Figure 8 As shown, when the rotary core is in a locked position relative to the lock core housing (the locked position in this application refers to the position before the unlocking head of the key drives the rotary core to rotate), one end of the limit rod abuts against the bent portion of the leaf spring, and under the action of the restoring elastic force of the leaf spring, the other end of the limit rod is pushed to abut against the limit portion of the lock core housing, and the limit block on the limit rod is embedded and slidably set in the limit groove, so that the rotary core cannot rotate; Figure 7As shown, when the unlocking head is inserted into the unlocking hole, the front end of the unlocking head presses the limit rod backward, causing the limit rod to move backward along the axial direction relative to the lock cylinder shell, thereby causing the limit block to move to the position where the guide groove and the limit groove intersect and connect, thereby causing the limit block to enter the guide groove, and when the key is turned, the unlocking head drives the rotary core to rotate, so that the rotary core is in an unlocked position relative to the lock cylinder shell (the unlocking position in this application refers to the position after the unlocking head drives the rotary core to rotate).

[0055] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A lock core, characterized in that: include: The lock body assembly comprises a lock core shell and a rotating core, the inner wall of the lock core shell is provided with a limiting groove along the axial direction and a guide groove along the circumferential direction, the limiting groove and the guide groove are intersected and communicated, the rotating core is rotatably arranged inside the lock core shell, and the rotating core comprises a limiting rod, the limiting rod comprises an unlocking part, a force-bearing part and a limiting block, the unlocking part and the force-bearing part are respectively arranged at two ends of the limiting rod along the axial direction, the limiting block is arranged on the side surface close to the force-bearing part, the rear end surface of the limiting block is arranged flush with the force-bearing part, and the limiting rod can move in the axial direction relative to the rotating core, and make the limiting block located in the limiting groove or the guide groove; A leaf spring, wherein the leaf spring has a bent portion, the bent portion abuts against one end of the limit rod and can generate an elastic force that enables the limit rod to move in an axial direction relative to the rotating core; The leaf spring is provided with a through hole and at least two bent portions arranged on the circumferential surface surrounding the outer side of the through hole, and the two bent portions are bent toward one side; each of the bent portions is in the shape of an arc strip, and a protrusion is formed at one end of the bent portion away from the through hole, and the protrusion abuts against the limit rod.

2. The lock core according to claim 1, characterized in that: An unlocking hole is provided at one end of the lock core shell, and a limiting portion surrounding the unlocking hole is provided at the end of the lock core shell where the unlocking hole is provided, and the limiting portion cooperates with the bending portion to limit the movement of the limiting rod in the axial direction relative to the lock core shell.

3. The lock core according to claim 2, characterized in that: The limiting portion is provided with an unlocking head positioning component, and the unlocking head positioning component includes at least one protrusion and at least one groove, and the protrusion and the groove are used for angular positioning when the unlocking head is inserted.

4. The lock core according to claim 1, characterized in that: The rotating core also includes a lock core, which includes an unlocking column and blades arranged around the unlocking column, an unlocking cavity is opened between the blades and the unlocking column, at least two of the blades are arranged axially, and an accommodating cavity for accommodating the limiting rod is formed between any two adjacent blades.

5. The lock core according to claim 4, characterized in that: The limiting rod and the two adjacent blades are slidably arranged, and the peripheral surface of the limiting rod abuts against the side surfaces of the two adjacent blades.

6. The lock core according to claim 2, characterized in that: The unlocking portion is arranged in the unlocking hole or in a space where the unlocking hole axially extends toward the interior of the lock core housing, and the force-bearing portion abuts against the bent portion.

7. A lock, characterized in that: The invention comprises the lock core as claimed in any one of claims 1 to 6.

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