A self-locking lock core that prevents breakage

Abstract

The invention relates to an anti-breaking self-locking lock core, wherein an outer clutch and an inner clutch are arranged in the lock shell for realizing the linkage between the pull and the outer lock core; a transverse pin hole and a first longitudinal hole are arranged in the inner clutch, a second longitudinal hole is arranged in the outer clutch, and a pin is fixedly arranged on the outer lock core, the pin has a pin portion which can be inserted into the transverse pin hole, so that the outer clutch and the inner clutch are linked to each other through the first limiting bead; when the lock shell is broken, the outer lock core and the pin are taken out, and the first limiting bead completely enters the first longitudinal hole, and at the same time, the locking component locks the outer clutch and the lock shell into an anti-breaking self-locking state, at this time, the inner clutch will rotate idly, and the outer clutch cannot be subjected to force, which can effectively prevent drilling and twisting off, has a clever design and high safety. In addition, the pull and the outer lock core, and the pull and the inner lock core are switched and linked by the turning key component, which ensures that after the front half of the lock core is broken by criminals, the rear half can still work normally, and has high safety.

Description

[Technical field]

[0001] The invention relates to the technical field of locks, in particular to an anti-breakage self-locking lock core. [Background technology]

[0002] At present, most of the ordinary double-sided lock cylinders on the market (that is, the lock can be opened by inserting the key from both inside and outside the door), when the criminals use tools to forcibly break the lock cylinder outside the door, the lock shell will generally break at the opening groove, and the pull or the turn key connected to the pull will be exposed. The criminals can then use various tools to turn the turn key or pull to unlock the door. This is also one of the means that many thieves often use violently to open the door; in this case, once the front half of the lock cylinder is broken by the criminals, the user cannot open the lock cylinder to open the door by using the correct key on the other side of the lock cylinder (that is, inside the room). Therefore, the user cannot open the door in the room to save himself, but must seek help from a professional locksmith, which brings great trouble to the users and poses great safety hazards to their lives and property.

[0003] Although some lock core structures that can prevent this phenomenon have appeared on the market, such locks have the disadvantages of high difficulty in production, many accessories, and difficult installation. Aiming at these disadvantages, the present invention has made improvements. [Summary of the invention]

[0004] In order to solve the above problems, the present invention provides a self-locking lock core with high safety which can effectively prevent drilling and twisting.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A self-locking lock core that prevents breaking, comprising a lock shell, a puller installed in an open groove in the middle of the lock shell, an outer lock core and an inner lock core respectively installed in the lock shell located on both sides of the puller, the lock shell is also provided with an outer clutch located between the puller and the outer lock core and linked to the puller through a turning key assembly, and an inner clutch that can be linked to the outer clutch or idling relative to the outer clutch, the outer lock core is linked to the inner clutch; the inner clutch is provided with transverse pin holes distributed along the key insertion direction and a first longitudinal hole vertically penetrating the transverse pin holes, the outer clutch is provided with a second longitudinal hole penetrating the first longitudinal hole, and a second longitudinal hole penetrating the first longitudinal hole is provided in the outer clutch. The first limiting bead is arranged in the hole and the second longitudinal hole, which can make the inner clutch and the outer clutch linked together. A pin is fixed on the outer lock core, and the pin has a pin portion which can be inserted into the transverse pin hole and make a part of the first limiting bead remain in the first longitudinal hole and the other part remain in the second longitudinal hole. In the non-anti-breaking self-locking state, the outer clutch and the inner clutch are linked together through the first limiting bead. When the lock shell is broken and the outer lock core and the pin are taken out, the first limiting bead completely enters the first longitudinal hole, so that the inner clutch can idle relative to the outer clutch and enter the anti-breaking self-locking state.

[0007] As a preferred embodiment, it is further defined as: a locking assembly is also provided in the lock housing, which can lock the external clutch member with the lock housing in the anti-break self-locking state.

[0008] As a preferred embodiment, it is further defined as: a third longitudinal hole coaxial with the second longitudinal hole is provided on the lock shell, and the locking assembly includes a steel ball and a limiting flat ball arranged in the third longitudinal hole from bottom to top, the lower end of the steel ball abuts against the upper end surface of the first limiting ball, and the lower end surface of the limiting flat ball abuts against the upper end of the steel ball; when the inner clutch drives the outer clutch to rotate, the steel ball rotates in the third longitudinal hole and contacts the side end surface of the outer clutch; when entering the anti-break self-locking state, the first limiting ball completely enters the first longitudinal hole, and at the same time, the steel ball enters the second longitudinal hole and abuts against the upper end surface of the first limiting ball, and the lower end of the limiting flat ball enters the second longitudinal hole to lock the outer clutch with the lock shell; when the inner clutch is idling relative to the outer clutch, the steel ball rotates in the second longitudinal hole and contacts the side end surface of the inner clutch.

[0009] As a preferred embodiment, it is further defined as: the side end surface of the inner clutch is concave to form an arc-shaped slide groove located outside the first longitudinal hole, and when entering the anti-break self-locking state, the lower end of the steel ball passes through the second longitudinal hole into the arc-shaped slide groove and abuts against the upper end surface of the first limiting bead.

[0010] As a preferred embodiment, it is further defined as: the outer clutch is also provided with a fourth longitudinal hole located at the lower end of the inner clutch and coaxial with the second longitudinal hole, a second limiting bead is provided in the fourth longitudinal hole, the upper end of the second limiting bead extends into the arc-shaped slide groove and abuts against the side end surface of the inner clutch.

[0011] As a preferred embodiment, it is further defined as: at least one stop cavity located on the outside of the third longitudinal hole is provided in the lock shell, and the locking assembly also includes a stop pin and a stop spring arranged in the stop cavity; a stop hole connected to the third longitudinal hole is provided at the bottom of the stop cavity, and one end of the stop pin is convexly formed with an insertion portion which can pass through the stop hole and be inserted into the third longitudinal hole under the action of the stop spring; when the anti-break self-locking state is not entered, the front end of the insertion portion passes through the stop hole and abuts against the side end surface of the limiting flat bead; when the anti-break self-locking state is entered, after the limiting flat bead falls, the insertion portion passes through the stop hole and is inserted into the third longitudinal hole and is located at the upper end of the limiting flat bead.

[0012] As a preferred embodiment, it is further defined as: the lock housing is further provided with a sealing sheet covering the outer side of the upper stop cavity.

[0013] As a preferred embodiment, it is further defined as: the locking assembly also includes a self-locking spring disposed in the third longitudinal hole and capable of pushing the limiting flat bead to move downward.

[0014] As a preferred embodiment, it is further defined as: one end of the outer clutch has an opening toward the outer lock core and is used to accommodate a rotating cavity of the inner clutch, and the other end is connected to the turning key assembly, and when entering the anti-break self-locking state, the inner clutch idles in the rotating cavity; a first slot is provided on the side of the outer lock core facing the inner clutch, and a first key matching the first slot is provided on the side of the inner clutch facing the outer lock core; a pin cavity for accommodating the pin and second slots located on both sides of the pin cavity and connected to the pin cavity are also provided on the side of the outer lock core facing the inner clutch, and the pin has a second key inserted into the second slot.

[0015] As a preferred embodiment, it is further defined as: a first meson bayonet is provided on the outer side of the outer lock core and is located between the first slot and the second slot and is communicated with the first slot and the second slot respectively; a second meson bayonet corresponding to the first meson bayonet is provided on the second key; the first meson bayonet and the second meson bayonet form an arc-shaped meson groove; a meson is provided in the meson groove for axially fixing the outer lock core and the pin.

[0016] As a preferred embodiment, it is further defined as: the turn key assembly is mainly composed of an outer turn key and an inner turn key hinged to the outer turn key, the outer clutch is provided with an outer turn key cavity for accommodating the outer turn key and a third slot located on both sides of the outer turn key cavity and connected to the outer turn key cavity on one side of the outer clutch toward the pull, the outer turn key is provided with a third insertion key matching the third slot; the pull is provided with a linkage hole adapted to the turn key assembly, when the outer clutch is linked with the pull, one end of the outer turn key is located in the outer clutch, and the other end is located in the linkage hole; the inner lock gall is linked with the pull through the inner turn key, and the inner lock gall is provided with an inner turn key cavity for accommodating the inner turn key and a third slot located on both sides of the inner turn key cavity and connected to the outer turn key cavity A fourth slot communicating with the inner turn key cavity, the inner turn key is provided with a fourth insertion key matching the fourth slot; the turn key assembly also includes a turn key spring, and the outer turn key is provided with a spring cavity for accommodating the turn key spring at one end facing the inner clutch, one end of the turn key spring abuts against the side end of the inner clutch, and the other end abuts against the bottom of the spring cavity; when the inner lock core is inserted with a key, the front end of the key pushes the outer turn key and the inner turn key toward the inner clutch to compress the turn key spring, and at the same time the outer turn key withdraws from the linkage hole, and one end of the inner turn key is inserted into the linkage hole so that the inner lock core is linked with the pull-pull; when the key is pulled out of the inner lock core, the turn key spring drives the outer turn key and the inner turn key to reset.

[0017] The beneficial effects of the present invention are:

[0018] The lock assembly of the present invention is characterized in that the outer clutch and the inner clutch are provided in the lock shell for realizing the linkage between the pull and the outer lock core; the inner clutch is provided with a transverse pin hole and a first longitudinal hole, the outer clutch is provided with a second longitudinal hole, and the outer lock core is fixed with a pin, the pin has a pin portion which can be inserted into the transverse pin hole, so that the outer clutch and the inner clutch are linked with each other through the first limiting bead; when the lock shell is broken, the outer lock core and the pin are taken out, and the first limiting bead enters the first longitudinal hole completely, so that the inner clutch can rotate idly relative to the outer clutch and enter the anti-breaking self-locking state, and at the same time, the locking assembly locks the outer clutch and the lock shell. At this time, the inner clutch will rotate idly, and the outer clutch cannot be subjected to force, which can effectively prevent drilling and twisting off. The design is ingenious, so that the lawbreakers cannot use tools to drive the pull and the pull to rotate when violently opening the door, which effectively prevents the lawbreakers from violently opening the door, and has high safety.

[0019] 2. The lever and the outer lock cylinder, as well as the lever and the inner lock cylinder, are switched and linked via a turning key assembly, ensuring that even if the front half of the lock cylinder is broken by criminals, the back half can still work normally, providing high security.

Brief Description of the Drawings

[0020] Figure 1 It is a structural schematic diagram of the invention;

[0021] Figure 2 yes Figure 1 Sectional view at AA;

[0022] Figure 3 It is a cross-sectional view of the transverse structure of the present invention;

[0023] Figure 4 It is a cross-sectional view of the structure in the anti-break self-locking state;

[0024] Figure 5 It is a longitudinal structural cross-sectional view in the anti-break self-locking state;

[0025] Figure 6 It is an exploded schematic diagram of the invention;

[0026] Figure 7 It is a structural diagram of the pull-and-drag;

[0027] Figure 8 It is a schematic diagram of the structure of the outer locking gallbladder;

[0028] Fig. 9 It is a schematic diagram of the structure of the inner locking gallbladder;

[0029] Fig.10 is a schematic diagram of the structure of the turn key assembly;

[0030] Fig.11 is an exploded schematic diagram of the turn key assembly;

[0031] Fig.12 It is one of the structural schematic diagrams of the external clutch;

[0032] Fig.13 This is the second schematic diagram of the structure of the external clutch;

[0033] Fig.14 It is a schematic diagram of the structure of the inner clutch;

[0034] Fig.15 It is a structural diagram of the pin. [Specific implementation method]

[0035] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0036] As attached Figure 1 To Attachment Figure 6As shown, an anti-breakage self-locking lock core comprises a lock shell 1, a puller 2 installed in an open groove in the middle of the lock shell 1, an outer lock core 3 and an inner lock core 4 respectively installed in the lock shell 1 on both sides of the puller 2, the lock shell 1 is also provided with an outer clutch 6 located between the puller 2 and the outer lock core 3 and linked with the puller 2 through a turning key assembly 5, and an inner clutch 7 that can be linked with the outer clutch 6 or idling relative to the outer clutch 6, the outer lock core 3 is linked with the inner clutch 7; the inner clutch 7 is provided with transverse pin holes 71 distributed along the key insertion direction and a first longitudinal hole 72 vertically penetrating the transverse pin holes 71, The outer clutch 6 is provided with a second longitudinal hole 61 which is interlinked with the first longitudinal hole 72, and the first limiting bead 8 which enables the inner clutch 7 to be linked with the outer clutch 6 is provided in the first longitudinal hole 72 and the second longitudinal hole 61, and a pin 9 is fixedly provided on the outer lock 3, and the pin 9 has a latch portion 91 which can be inserted into the transverse pin hole 71 and enables a part of the first limiting bead 8 to be kept in the first longitudinal hole 72 and another part to be kept in the second longitudinal hole 61; in the non-anti-break self-locking state, the outer clutch 6 and the inner clutch 7 are linked with each other through the first limiting bead 8; as shown in the attached Figure 4 and attached Figure 5 As shown, when the lock shell 1 is broken and the outer lock core 3 and the pin 9 are taken out, the first limiting bead 8 completely enters the first longitudinal hole 72, so that the inner clutch 7 can idle relative to the outer clutch 6 and enter the anti-breaking self-locking state. In addition, the lock shell 1 is also provided with a locking assembly 10 that can lock the outer clutch 6 with the lock shell 1 in the anti-breaking self-locking state. At this time, the inner clutch will idle, and the outer clutch cannot be subjected to force, which can effectively prevent drilling and twisting. The design is ingenious, so that criminals cannot use tools to drive the turning and rotation when violently opening the door, and the safety is high.

[0037] Furthermore, the lock housing 1 is provided with a third longitudinal hole 11 coaxial with the second longitudinal hole 61, and the locking assembly 10 includes a steel ball 101 and a limiting flat ball 102 sequentially arranged in the third longitudinal hole 11 from bottom to top, the lower end of the steel ball 101 abuts against the upper end surface of the first limiting ball 8, and the lower end surface of the limiting flat ball 102 abuts against the upper end of the steel ball 101; when the inner clutch 7 drives the outer clutch 6 to rotate, the steel ball 101 rotates in the third longitudinal hole 11 and contacts with the side end surface of the outer clutch 6; as shown in the attached Figure 4 and attached Figure 5As shown, when entering the anti-breakage self-locking state, the first limiting bead 8 completely enters the first longitudinal hole 72, and at the same time the steel ball 101 enters the second longitudinal hole 61 and rests on the upper end surface of the first limiting bead 8, and the lower end of the limiting flat bead 102 enters the second longitudinal hole 61 to lock the outer clutch 6 and the lock housing 1; when the inner clutch 7 is idling relative to the outer clutch 6, the steel ball 101 rotates in the second longitudinal hole 61 and contacts the side end surface of the inner clutch 7.

[0038] In this embodiment, in order to further improve the smoothness of the movements between the various components and prevent the machine from getting stuck, the side end surface of the inner clutch 7 is concavely formed with an arc-shaped slide groove 73 located outside the first longitudinal hole 72. When entering the anti-break self-locking state, the lower end of the steel ball 101 passes through the second longitudinal hole 61 into the arc-shaped slide groove 73 and abuts against the upper end surface of the first limiting bead 8. The steel ball 101 has a larger rotation space in the arc-shaped slide groove 73, which can effectively prevent the steel ball from jamming the outer clutch 6 and the inner clutch 7, and ensure the smoothness of the relative rotation between the outer clutch 6 and the inner clutch 7.

[0039] In this embodiment, the outer clutch 6 is further provided with a fourth longitudinal hole 65 located at the lower end of the inner clutch 7 and coaxial with the second longitudinal hole 61, and a second limiting bead 66 is provided in the fourth longitudinal hole 65. The upper end of the second limiting bead 66 extends into the arc-shaped slide groove 73 and abuts against the side end surface of the inner clutch 7; the second limiting bead 66 has a limiting effect on the axial direction of the inner clutch 7, ensuring that the first longitudinal hole 72, the second longitudinal hole 61 and the third longitudinal hole 11 are coaxial, thereby improving the smoothness of the movement between the components and preventing mechanical jamming.

[0040] In this embodiment, in order to prevent criminals from prying the first limit bead 8, the steel ball 101 and the limit flat bead 102 upward, at least one upper stop cavity 12 located outside the third longitudinal hole 11 is provided in the lock housing 1. Figure 2As shown, there are two upper stop chambers 12, which are symmetrically distributed on both sides of the third longitudinal hole 11; the locking assembly 10 also includes a stop pin 103 and a stop spring 104 arranged in the upper stop chamber 12, and there are also two stop pins 103 and stop springs 104; the bottom of the upper stop chamber 12 is provided with a stop hole 13 connected to the third longitudinal hole 11, and one end of the stop pin 103 is convexly formed with a stop hole 13 that can be inserted into the stop spring 104 through the stop hole 13 under the action of the stop spring 104. The insertion part 1031 in the third longitudinal hole 11; when the anti-breakage self-locking state is not entered, the front end of the insertion part 1031 passes through the stop hole 13 and rests on the side surface of the limiting flat bead 102; when the anti-breakage self-locking state is entered, after the limiting flat bead 102 falls, the insertion part 1031 passes through the stop hole 13 and is inserted into the third longitudinal hole 11 and is located at the upper end of the limiting flat bead 102, which can prevent the limiting flat bead 102 from moving upward, and criminals cannot pry it, with high safety. In order to ensure that the first limiting bead 8, the steel ball 101 and the limiting flat bead 102 can move downward smoothly when entering the anti-breaking self-locking state, the locking assembly 10 also includes a self-locking spring 106 arranged in the third longitudinal hole 11 and capable of pushing the limiting flat bead 102 to move downward. In the non-anti-breaking self-locking state, the latch portion 91 is inserted into the transverse pin hole 71 and a part of the first limiting bead 8 is maintained in the first longitudinal hole 72 and the other part is maintained in the second longitudinal hole 61, while supporting the steel ball 101 and the limiting flat bead 102 and compressing the self-locking spring 106.

[0041] In this embodiment, the lock housing 1 is further provided with a sealing sheet 105 covering the outer side of the upper stop cavity 12. Furthermore, the lock housing 1 is provided with a sealing sheet groove 107, into which the sealing sheet 105 is inserted from the side end. In order to prevent the sealing sheet 105 from falling off, the sealing sheet groove 107 is a narrow outer and wide inner constriction structure.

[0042] In this embodiment, as shown in the attached Fig.12 To Attachment Fig.14 As shown, one end of the outer clutch 6 has a rotation cavity 62 which opens toward the outer lock core 3 and is used to accommodate the inner clutch 7, and the other end is connected to the turning key assembly 5. When entering the anti-break self-locking state, the inner clutch 7 idles in the rotation cavity 62; as shown in the attached Figure 8 As shown, the outer lock core 3 is provided with a first slot 31 on the side facing the inner clutch 7, and the inner clutch 7 is provided with a first key 74 that matches the first slot 31 on the side facing the outer lock core 3; the outer lock core 3 is also provided with a pin cavity 33 for accommodating the pin 9 on the side facing the inner clutch 7, and a second slot 32 located on both sides of the pin cavity 33 and connected to the pin cavity 33, as shown in the attached Fig.15As shown, the pin 9 has a second key 92 inserted into the second slot 32. The second slot 32 and the second key 92 cooperate to realize the linkage between the pin 9 and the outer lock core 3. The structure is simple and the design is ingenious.

[0043] In this embodiment, the outer side of the outer lock core 3 is provided with a first meson bayonet 34 located between the first slot 31 and the second slot 32 and communicated with the first slot 31 and the second slot 32 respectively, and the second plug key 92 is provided with a second meson bayonet 93 corresponding to the first meson bayonet 34, and the first meson bayonet 34 and the second meson bayonet 93 constitute an arc-shaped meson groove, and the meson groove is provided with a meson that axially fixes the outer lock core 3 and the pin 9. The outer lock core 3 is axially fixed to the pin 9 by the meson, and when the criminal breaks the front half of the lock shell 1, when the outer lock core 3 is taken out, it can be ensured that the pin 9 is also taken out at the same time, so that it can enter the anti-breaking self-locking state.

[0044] As attached Fig.10 and attached Fig.11 As shown, the key assembly 5 is mainly composed of an outer key 51 and an inner key 52 hinged to the outer key 51. The outer clutch 6 is provided with an outer key cavity 64 for accommodating the outer key 51 and a third slot 63 located on both sides of the outer key cavity 64 and connected to the outer key cavity 64 on the side facing the pull 2. The outer key 51 is provided with a third key 53 matching the third slot 63. Figure 7 As shown, the pull-out 2 is provided with a linkage hole 21 adapted to the turn key assembly 5. When the outer clutch 6 is linked with the pull-out 2, one end of the outer turn key 51 is located in the outer clutch 6, and the other end is located in the linkage hole 21; the inner lock core 4 is linked with the pull-out 2 through the inner turn key 52, as shown in the attached Fig. 9As shown, the inner lock core 4 is provided with an inner turn key cavity 42 for accommodating the inner turn key 52 and a fourth slot 41 located on both sides of the inner turn key cavity 42 and connected with the inner turn key cavity 42, and the inner turn key 52 is provided with a fourth insert key 54 matching the fourth slot 41; the turn key assembly 5 also includes a turn key spring 55, and the end of the outer turn key 51 facing the inner clutch 7 is provided with a spring cavity 56 for accommodating the turn key spring 55, and one end of the turn key spring 55 is against the inner clutch The side end of the member 7 and the other end are against the bottom of the spring cavity 56; when the inner lock core 4 is inserted with a key, the front end of the key pushes the outer turn key 51 and the inner turn key 52 toward the inner clutch member 7 to compress the turn key spring 55, and at the same time, the outer turn key 51 withdraws from the linkage hole 21, and one end of the inner turn key 52 is inserted into the linkage hole 21 so that the inner lock core 4 is linked with the puller 2; when the key is pulled out of the inner lock core 4, the turn key spring 55 drives the outer turn key 51 and the inner turn key 52 to reset. The puller 2 and the outer lock core 3, and the puller 2 and the inner lock core 4 are switched and linked through the turn key assembly 5, which ensures that after the front half of the lock core is broken by criminals, the back half can still work normally, and the safety is high.

Claims

1. An anti-breakage self-locking lock core, comprising a lock housing (1), a puller (2) mounted in an opening groove in the middle of the lock housing (1), an outer lock core (3) and an inner lock core (4) respectively mounted in the lock housing (1) on both sides of the puller (2), characterized in that The lock housing (1) is also provided with an external clutch (6) located between the puller (2) and the outer lock core (3) and linked to the puller (2) through a key assembly (5), and an internal clutch (7) capable of being linked to the external clutch (6) or idling relative to the external clutch (6), and the outer lock core (3) is linked to the internal clutch (7); the internal clutch (7) is provided with a transverse pin hole (71) distributed along the key insertion direction and a first longitudinal hole (72) vertically penetrating the transverse pin hole (71); the external clutch (6) is provided with a second longitudinal hole (61) penetrating the first longitudinal hole (72); and the first longitudinal hole (72) and the second longitudinal hole (61) are provided with a plurality of holes that enable the internal clutch (7) to be locked with the external clutch. The outer lock core (3) is provided with a first limiting bead (8) which is linked to the inner clutch (7). The outer lock core (3) is fixed with a pin (9), and the pin (9) has a pin portion (91) which can be inserted into the transverse pin hole (71) and allows a portion of the first limiting bead (8) to be retained in the first longitudinal hole (72) and another portion to be retained in the second longitudinal hole (61); in the non-anti-breaking self-locking state, the outer clutch (6) and the inner clutch (7) are linked through the first limiting bead (8); when the lock housing (1) is broken and the outer lock core (3) and the pin (9) are taken out, the first limiting bead (8) completely enters the first longitudinal hole (72), so that the inner clutch (7) can idle relative to the outer clutch (6) and enter the anti-breaking self-locking state.

2. The anti-breakage self-locking lock core according to claim 1, characterized in that The lock housing (1) is also provided with a locking assembly (10) which enables the external clutch component (6) to be locked with the lock housing (1) in the anti-breaking self-locking state.

3. The anti-breakage self-locking lock core according to claim 2, characterized in that The lock housing (1) is provided with a third longitudinal hole (11) coaxial with the second longitudinal hole (61); the locking assembly (10) comprises a steel ball (101) and a limiting flat ball (102) arranged in sequence from bottom to top in the third longitudinal hole (11); the lower end of the steel ball (101) abuts against the upper end surface of the first limiting ball (8), and the lower end surface of the limiting flat ball (102) abuts against the upper end of the steel ball (101); when the inner clutch (7) drives the outer clutch (6) to rotate, the steel ball (101) rotates in the third longitudinal hole (11) and engages with the outer clutch (6); when entering the anti-breakage self-locking state, the first limiting bead (8) completely enters the first longitudinal hole (72), and at the same time the steel ball (101) enters the second longitudinal hole (61) and abuts against the upper end surface of the first limiting bead (8), and the lower end of the limiting flat bead (102) enters the second longitudinal hole (61) so that the outer clutch (6) and the lock housing (1) are locked; when the inner clutch (7) is idling relative to the outer clutch (6), the steel ball (101) rotates in the second longitudinal hole (61) and contacts the side end surface of the inner clutch (7).

4. The anti-breakage self-locking lock core according to claim 3, characterized in that The side end surface of the inner clutch (7) is concavely formed with an arc-shaped slide groove (73) located outside the first longitudinal hole (72); when entering the anti-break self-locking state, the lower end of the steel ball (101) passes through the second longitudinal hole (61) into the arc-shaped slide groove (73) and abuts against the upper end surface of the first limiting bead (8).

5. The anti-breakage self-locking lock core according to claim 4, characterized in that The outer clutch component (6) is also provided with a fourth longitudinal hole (65) located at the lower end of the inner clutch component (7) and coaxial with the second longitudinal hole (61); a second limiting bead (66) is provided in the fourth longitudinal hole (65); the upper end of the second limiting bead (66) extends into the arc-shaped sliding groove (73) and abuts against the side end surface of the inner clutch component (7).

6. The anti-breakage self-locking lock core according to claim 3, characterized in that At least one stop cavity (12) is provided in the lock housing (1) and is located outside the third longitudinal hole (11). The locking assembly (10) also includes a stop pin (103) and a stop spring (104) provided in the stop cavity (12). A stop hole (13) communicating with the third longitudinal hole (11) is provided at the bottom of the stop cavity (12). One end of the stop pin (103) is convexly formed with a protrusion that can pass through the stop hole under the action of the stop spring (104). (13) an insertion portion (1031) inserted into the third longitudinal hole (11); when the anti-breakage self-locking state is not entered, the front end of the insertion portion (1031) passes through the upper stop hole (13) and abuts against the side end surface of the limiting flat bead (102); when the anti-breakage self-locking state is entered, after the limiting flat bead (102) falls, the insertion portion (1031) passes through the upper stop hole (13) and is inserted into the third longitudinal hole (11) and is located at the upper end of the limiting flat bead (102).

7. The anti-breakage self-locking lock core according to claim 6, characterized in that The lock housing (1) is also provided with a sealing sheet (105) which seals the outer side of the upper stop cavity (12).

8. The anti-breakage self-locking lock core according to claim 6, characterized in that The locking assembly (10) further comprises a self-locking spring (106) which is arranged in the third longitudinal hole (11) and can push the limiting flat bead (102) to move downward.

9. The anti-breakage self-locking lock core according to any one of claims 1 to 8, characterized in that One end of the outer clutch (6) has a rotating cavity (62) opening toward the outer lock core (3) and used to accommodate the inner clutch (7), and the other end is connected to the rotating key assembly (5). When entering the anti-break self-locking state, the inner clutch (7) idles in the rotating cavity (62); a first slot (31) is provided on the side of the outer lock core (3) facing the inner clutch (7), and a first key (74) matching with the first slot (31) is provided on the side of the inner clutch (7) facing the outer lock core (3); a pin cavity (33) for accommodating the pin (9) and a second slot (32) located on both sides of the pin cavity (33) and connected with the pin cavity (33) are provided on the side of the outer lock core (3) facing the inner clutch (7), and the pin (9) has a second key (92) inserted into the second slot (32).

10. The anti-breakage self-locking lock core according to claim 9, characterized in that The outer side of the outer lock core (3) is provided with a first meson slot (34) located between the first slot (31) and the second slot (32) and communicated with the first slot (31) and the second slot (32) respectively, and the second plug key (92) is provided with a second meson slot (93) corresponding to the first meson slot (34), the first meson slot (34) and the second meson slot (93) form an arc-shaped meson slot, and a meson is provided in the meson slot for axially fixing the outer lock core (3) and the pin (9).

11. The anti-breakage self-locking lock core according to claim 9, characterized in that The key assembly (5) is mainly composed of an outer key (51) and an inner key (52) hinged to the outer key (51); the outer clutch (6) is provided with an outer key cavity (64) for accommodating the outer key (51) and a third slot (63) located on both sides of the outer key cavity (64) and connected to the outer key cavity (64); the outer key (51) is provided with a third insertion key (53) matching the third slot (63); the dialing and pulling (2) A linkage hole (21) adapted to the key assembly (5) is provided. When the external clutch (6) is linked with the puller (2), one end of the external key (51) is located in the external clutch (6), and the other end is located in the linkage hole (21). The internal lock core (4) is linked with the puller (2) via an internal key (52). The internal lock core (4) is provided with an internal key cavity (42) for accommodating the internal key (52) and two keys located on both sides of the internal key cavity (42) and connected to the internal key cavity (42). 2) a fourth slot (41) extending therethrough, the inner turn key (52) being provided with a fourth insertion key (54) matching the fourth slot (41); the turn key assembly (5) further comprising a turn key spring (55), the outer turn key (51) being provided with a spring cavity (56) for accommodating the turn key spring (55) at one end thereof facing the inner clutch member (7), one end of the turn key spring (55) being against the side end of the inner clutch member (7), and the other end being against the bottom of the spring cavity (56); when the inner lock After the key is inserted into the cylinder (4), the front end of the key pushes the outer turn key (51) and the inner turn key (52) toward the inner clutch (7) to compress the turn key spring (55), and at the same time, the outer turn key (51) withdraws from the linkage hole (21), and one end of the inner turn key (52) is inserted into the linkage hole (21) so that the inner lock cylinder (4) is linked with the puller (2); when the key is pulled out of the inner lock cylinder (4), the turn key spring (55) drives the outer turn key (51) and the inner turn key (52) to reset.

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