TWI727892B - Lock core with a hidden key hole - Google Patents

Abstract

A lock core with a hidden keyhole is provided to solve the problem that prior lock cores are easily cracked. This lock core includes an outer sleeve with a first locking region; an inner sleeve inside the outer sleeve, with a second locking region facing to the first locking region; a locking assembly is located to the first locking region and the second locking region, with a plurality of locking members locates in the parting of the outer sleeve and the inner sleeve while the locking assembly presents in a locking status; and a rotating assembly associates with the inner sleeve, with a key seat is axial movably set inside the inner sleeve. When the key seat rotates, the key seat drives the inner sleeve to rotate relatively to the outer sleeve.

Description

Hidden lock cylinder

The present invention relates to a hidden lock core, especially a hidden lock core that does not expose its lock components.

Please refer to Figure 1, which is a conventional lock anti-theft device 9 attached to the outer side of a lock body 91 with a cover 92 corresponding to the lock of the lock body 91 The hole 911 has an opening 921. A magnetic plate 93 is provided on the inner surface of the cover sheet 92 at a position corresponding to the opening 921, and the magnetic plate 93 has a through hole 931 with a diameter slightly smaller than the opening 921. Thereby, the through hole 931 can be aligned with the opening 921 to form a receiving slot with a magnetic inner edge, and the receiving slot can be used to absorb a decorative cover 94 to hide the lock hole 911. An embodiment similar to the conventional lock anti-theft device 9 has been disclosed in the Republic of China Patent Publication No. M287361.

However, the conventional lock anti-theft device 9 is a very negative way of shielding the keyhole. Those who are interested only need to use a magnet with a magnetic attraction force greater than the magnetic plate 93 to remove the decorative cover 94, or use a sharp tip. The object is inserted from the edge of the decorative cover 94 and the accommodating groove, and the decorative cover 94 can also be picked out. As a result, the lock hole 911 of the lock body 91 will be exposed, which causes the conventional lock anti-theft device 9 to hide the lock hole 911 function of it. Furthermore, since the lock hole 911 can be opened only by the tooth portion 951 of a key 95, when the decorative cover 94 is removed, a person of interest can use foreign objects to invade the lock hole 911 to open the lock. The body 91 causes the anti-theft effect of the conventional lock anti-theft device 9 to be poor.

In view of this, the conventional lock anti-theft device does still need to be improved.

In order to solve the above-mentioned problems, the object of the present invention is to provide a hidden lock core that can hide its lock assembly, but cannot use a tool from the outside of the hidden lock core to damage the lock assembly.

The second objective of the present invention is to provide a hidden lock core, and when it is damaged by an external force, its lock assembly will not be damaged and be unlocked.

Another object of the present invention is to provide a hidden lock core with a double anti-theft mechanism.

Another object of the present invention is to provide a hidden lock cylinder whose corresponding key is extremely difficult to be cracked and copied.

The directionality described in the full text of the present invention or its similar terms, such as "front", "rear", "left", "right", "up (top)", "down (bottom)", "inner", "outer" , "Side", etc., mainly refer to the directions of the attached drawings, and the terms of directionality or similar terms are only used to assist in the description and understanding of the embodiments of the present invention, and are not intended to limit the present invention.

The elements and components described in the full text of the present invention use the quantifiers "one" or "one" for convenience and to provide the general meaning of the scope of the present invention; in the present invention, it should be construed as including one or at least one, and single The concept of also includes the plural, unless it clearly implies other meanings.

Approximate terms such as "combination", "combination" or "assembly" mentioned in the full text of the present invention mainly include the types that can be separated without destroying the components after being connected, or the components cannot be separated after being connected, which are common knowledge in the field Those can be selected based on the materials of the components to be connected or assembly requirements.

The hidden lock core of the present invention includes: an outer sleeve having a first locking area; an inner sleeve located in the outer sleeve, the inner sleeve having a second locking area aligned with the first Locking area; a locking assembly is located in the first locking area and the second locking area. When the locking assembly is in a locked state, several locking parts are located on the outer sleeve and the inner sleeve The cylinder boundary; and a rotating assembly, combined with the inner sleeve, and has a key holder arranged in the inner sleeve so as to be axially displaceable, the circumferential surface of the key holder has a key positioning groove, and the key holder is rotated The inner sleeve can be linked to rotate relative to the outer sleeve.

Accordingly, the concealed lock core of the present invention can conceal its lock assembly, but cannot use tools to damage the lock assembly from the outside of the hidden lock core, and has a good anti-theft effect.

Wherein, the circumferential surface of the key holder can be circular. In this way, in order to be processed and manufactured and rotate smoothly with respect to the inner sleeve, it has the functions of improving the convenience of manufacturing and the smoothness of rotation.

The concealed lock cylinder may further include a key that can be placed in the key positioning slot. When the key positioning slot is located in the second lock area of the inner sleeve, the key can change the lock assembly from the locked state Switch to the unlocked state. In this way, it has the effect of improving the convenience of operation.

Wherein, the key may have an arc surface facing the second lock area, and the arc of the arc surface may be consistent with the arc of the circumferential surface of the key holder. In this way, as long as the arc of the arc is wrong, it will affect the unlocking function of the key on the lock assembly, making it difficult for non-genuine keys to unlock smoothly, and the key will be extremely difficult to be cracked and copied, which has the effect of enhancing the anti-theft effect.

Wherein, the arc surface may have a plurality of lock bead holes arranged in a two-dimensional array. In this way, the difficulty of counterfeiting the key can be increased, and the anti-theft effect can be further improved.

Wherein, the rotating assembly may have a linkage pin combined with the key holder, and rotate the inner sleeve when the key holder is rotated, the linkage pin may have at least one weakened portion, and the structural strength of the linkage pin at the weakened portion may be Less than the structural strength of the latch, when the latch assembly is in the locked state, rotating the key holder can cause the interlocking pin to form a fracture at the weakened portion, and the key holder can rotate idly relative to the inner sleeve. In this way, when the key holder is rotated by improper external force, the breakage of the interlocking pin can be used to cause the key holder to rotate idly relative to the inner sleeve, so as to ensure that the lock assembly will not be damaged and unlocked. Further enhance the effectiveness of the anti-theft effect.

Wherein, the rotating assembly may have a guide post located in the inner sleeve, the guide post can be combined with the inner sleeve and can penetrate into an axial passage of the key holder, and the interlocking pin can be combined with the key holder and It can penetrate into a guide rail of the guide post. When the key holder is axially displaced relative to the inner sleeve, the interlocking pin can move synchronously along the guide rail. The weakened portion of the interlocking pin can oppose the ring of the guide post. Peripheral surface. In this way, a simple structure can be used to assist in guiding the key holder relative to the inner sleeve when the axial displacement is not accompanied by rotation, so as to ensure that after the key holder is pushed in, the part for setting the key can be accurately positioned in the inner sleeve. The second locking area of the sleeve is convenient for unlocking, and has the functions of reducing manufacturing cost, improving assembly and operation convenience, and the like.

Wherein, the guide rail can penetrate two opposite sides of the circumferential surface of the guide post, the linkage pin can penetrate the guide rail, the number of weakened portions of the linkage pin can be two, and the two weakened portions can respectively align the guide post的环面。 The circumferential surface. In this way, the interlocking pin can have two circumferential surfaces that align with the guide post, so as to further enhance the effect of guiding the axial displacement of the key holder and restricting the rotation of the key holder.

Wherein, the inner sleeve may have an opening and an end plate opposite to each other, and the rotating assembly may have an operating part connected to an end of the key holder away from the end plate. In this way, it has the effect of improving the convenience of operation.

Wherein, the key holder may have a first shoulder located in the axial passage adjacent to the end plate, the end of the guide post located in the axial passage may form a second shoulder, and the key holder is pulled When exiting, the first shoulder and the second shoulder can abut against each other. In this way, the key holder can be prevented from being pulled out excessively and coming out of the inner sleeve, which has the effect of improving the convenience of operation.

Wherein, the key holder can be divided into a first seat body and a second seat body that are axially adjacent, and the inner wall surface of a groove of the first seat body may have at least one rotating convex part, and the second seat body There may be a convex block penetrating into the groove of the first seat body, the at least one rotating convex part may align into a ring groove of the convex block, and a safety pin may be fixedly connected to the first seat body and the second seat body. In the seat body, the safety pin may have at least one weakened portion on the circumferential surface of the convex block, and the structural strength of the safety pin at the weakened portion may be less than the structural strength of the latch. In this way, when the second seat body is rotated by improper external force, the breakage of the safety pin can be used to cause the second seat body to form idling relative to the first seat body, thereby ensuring that the locking assembly will not be damaged When unlocked, it has the effect of further enhancing the anti-theft effect.

Wherein, the interlocking pin may be combined with the first base body, the key positioning groove may be located on the circumferential surface of the first base body, and the rotating assembly may have a manipulation portion connected to the second base body. In this way, it has the effect of improving the convenience of assembly.

The hidden lock core may further include a lock shell, and the outer sleeve may be located in the lock shell and combined with the lock shell.

In order to make the above and other objectives, features and advantages of the present invention more comprehensible, the following describes the preferred embodiments of the present invention in conjunction with the accompanying drawings in detail as follows:

Please refer to Figure 2, which is the first embodiment of the hidden lock cylinder of the present invention. It includes an outer sleeve 1, an inner sleeve 2, a lock assembly 3 and a rotating assembly 4. The inner sleeve 2 is located in the outer sleeve 1, the rotating assembly 4 is generally located in the inner sleeve 2, and the locking assembly 3 can restrict the outer sleeve 1 and the inner sleeve 2 from rotating relative to each other.

Please refer to Figures 2 and 3, the outer sleeve 1 can be generally hollow and tubular, and the outer sleeve 1 has a first locking area 11 for the locking assembly 3 to be arranged. In this embodiment, the first locking area 11 may be a plurality of holes penetrating the inner and outer circumferential surfaces of the outer sleeve 1 to accommodate the upper half of the locking assembly 3, and can be covered by the outer sleeve A lock shell 5 on the outer circumference of the sleeve 1 prevents the lock assembly 3 from protruding from the outer circumferential surface of the outer sleeve 1 to help locate the lock assembly 3, and the lock shell 5 can be combined with the The lock to which the lock cylinder is to be hidden (not shown in the figure); wherein the lock can be various types of locks such as U-shaped locks, disc brake locks, steering wheel locks or door locks, and the invention is not limited. In addition, the outer sleeve 1 and the lock shell 5 can be combined by tight fitting or pin connection, so that there is almost no relative displacement or rotation between the two.

The inner sleeve 2 is located in the outer sleeve 1, and the inner sleeve 2 has a second locking area 21 aligned with the first locking area 11; in this embodiment, the second locking area 21 is the same It may be a number of through holes to accommodate the lower half of the lock assembly 3, and make the lower half of the lock assembly 3 protrude from the inner circumferential surface of the inner sleeve 2 in a normal state In a state of extending into the inner space of the inner sleeve 2. In addition, the inner sleeve 2 of this embodiment may be roughly cup-shaped and have an opening 22 and an end plate 23 opposite to the opening 22. The inner sleeve 2 may also have an actuating portion 24 protruding from the end plate. The outer surface of 23 is connected by the actuating portion 24 to the relevant parts of the lock to be used for the hidden lock core, and when the inner sleeve 2 rotates, the actuating portion 24 links the lock bolt of the lock .

The lock assembly 3 can be located in the first lock area 11 and the second lock area 21, so that the lock assembly 3 is hidden, and the lock assembly 3 cannot be seen from the outside of the hidden lock core. It is also impossible to use tools such as magnets or sharp objects to destroy the lock assembly 3. Also, please refer to Figures 3 and 5, when the second lock area 21 of the inner sleeve 2 is not aligned with a key K, the lock assembly 3 can assume a locked state, and the lock assembly 3 Several latches 31 are located at the boundary between the outer sleeve 1 and the inner sleeve 2, so that the outer sleeve 1 and the inner sleeve 2 cannot rotate relative to each other; please also refer to Figure 7, the inner sleeve When the second lock area 21 of 2 is aligned with the key K, the lock assembly 3 can assume an unlocked state, and the latches 31 will not be located at the boundary between the outer sleeve 1 and the inner sleeve 2 At this point, the outer sleeve 1 and the inner sleeve 2 can be relatively rotated.

Please refer to Figures 2 and 3 again. The present invention does not limit the type of the lock assembly 3, and is based on the principle that the lock assembly 3 can be used with the corresponding key K to achieve the aforementioned locking and unlocking functions. It is not limited to the up and down lock bead type, the lock row piece type, or other structures with similar functions. In this embodiment, each of the latching members 31 can be an upper locking ball, and each of the upper locking balls can be matched with a pair of positioning members 32 such as a lower locking ball, and a return member 33 such as a spring. ; And in terms of the direction shown in Figure 3, the positioning member 32, the locking member 31 and the reset member 33 are arranged in order from bottom to top. Wherein, the positioning member 32 is substantially located in the second locking region 21 of the inner sleeve 2, and the bottom ends of the plurality of positioning members 32 can pass through the second locking region 21 to extend into the inner sleeve The inner space of the barrel 2 is retracted into the second locking area 21 when pushed; the restoring member 33 is substantially located in the first locking area 11 of the outer sleeve 1, and the bottom of the restoring member 33 The end can abut against the latching member 31, and the top end of the resetting member 33 can be blocked and restricted by the lock shell 5.

The rotating assembly 4 is combined with the inner sleeve 2 and has a key holder 41. The key holder 41 is axially displaceable in the inner sleeve 2, and the inner sleeve 2 can be linked by rotating the key holder 41. It rotates relative to the outer sleeve 1. The circumferential surface of the key holder 41 may be circular, so as to be manufactured and rotate smoothly relative to the inner sleeve 2. The circumferential surface of the key holder 41 may have a key positioning groove 411. The key holder 41 can be pulled out a predetermined distance to expose the key positioning groove 411 for the user to place the key K in the key positioning groove 411. Continued Move the key holder 41 toward the end plate 23 of the inner sleeve 2 so that the key positioning slot 411 is located in the second lock area 21 of the inner sleeve 2 so that the key K can remove the lock assembly 3 from The locked state is switched to the unlocked state.

Wherein, the key K used in this embodiment can be generally in the form of a piece. The key K can have an arc surface K1 facing the second locking area 21, and the arc surface K1 has at least one unlocking groove K2, and the unlocking groove K2 The type corresponding to the lock assembly 3; for example, the lock assembly 3 adopts the lock ball type, and the corresponding unlock groove K2 can be several lock ball holes (as shown in Figure 2), and the lock For the lock assembly 3 of the plate row type, the corresponding unlocking groove K2 can be a serpentine groove (as shown in Fig. 14). It is worth noting that the arc of the arc surface K1 of the key K can be consistent with the arc of the circumferential surface of the key holder 41; thus, if the key K is not a genuine one, as long as the arc of the arc surface K1 is not correct, the arc will be affected. The unlocking function of the key K on the lock assembly 3 prevents the lock assembly 3 from being reliably switched from the locked state to the unlocked state. Furthermore, in this embodiment, the plurality of lock bead holes can be further arranged in a two-dimensional array to increase the difficulty of imitating the key K, and in combination with the arc of the arc surface K1, the key K Even if it is obtained by Xiao Xiao, it is extremely difficult to be cracked and copied.

Please refer to Figures 2 and 3 again, the key holder 41 can be directly or indirectly combined with the inner sleeve 2, so that when the lock assembly 3 is in an unlocked state, the key holder 41 can be rotated to drive the key holder 41 to rotate. The inner sleeve 2 rotates synchronously with respect to the outer sleeve 1. In this embodiment, the key holder 41 can be indirectly combined with the inner sleeve 2 by a guide post 42, and the guide post 42 assists in guiding the key holder 41 relative to the inner sleeve 2 when axially displaced. It will be generated with rotation to ensure that after the key holder 41 is moved toward the end plate 23 of the inner sleeve 2 to be positioned, the key K can be accurately positioned in the second locking area 21 of the inner sleeve 2.

In detail, the key holder 41 may have an axial passage 412, which is generally located at the axis of the key holder 41, and may be in a penetrating shape for processing. The guide post 42 is located in the inner sleeve 2, and the guide post 42 mainly penetrates the axial passage 412. One end of the guide post 42 may be located outside the axial passage 412 so as to be pin-connected to the inner sleeve 2. The guide post 42 has a guide rail 421 extending in the axial direction. A linkage pin 43 is combined with the key holder 41 and penetrates the guide rail 421, so that when the key holder 41 is axially displaced relative to the inner sleeve 2, the linkage pin 43 43 can move synchronously along the guide rail 421, and when the key holder 41 rotates relative to the inner sleeve 2, the interlocking pin 43 will be stuck to the upper or lower wall of the guide rail 421, so the interlocking The cooperation of the pin 43 and the guide rail 421 restricts that the key holder 41 can only be axially displaced relative to the inner sleeve 2 under normal operation, and will not rotate relative to the inner sleeve 2. In addition, the guide rail 421 of this embodiment can penetrate two opposite sides of the circumferential surface of the guide post 42, and the linkage pin 43 can penetrate the guide rail 421, so that the linkage pin 43 can have two rings that align the guide post 42. The peripheral surface can further enhance the effect of guiding the axial displacement of the key holder 41 and restricting the rotation of the key holder 41.

On the other hand, please refer to Figures 3 and 6, the key holder 41 may have a first shoulder 413 located in the axial passage 412 adjacent to the end plate 23, and the guide post 42 is located in the axial passage The inner end of 412 can form a second shoulder 422. When the key holder 41 is pulled out, the first shoulder 413 and the second shoulder 422 can be abutted to prevent the key holder 41 from being excessively pulled out of the inner sleeve 2.

Please refer to Figures 2 and 4, the linkage pin 43 of this embodiment may have at least one weakened portion 431 on the circumferential surface of the guide post 42, so that the structural strength of the linkage pin 43 at the weakened portion 431 can be less than The structural strength of the latch 31. Wherein, the present invention does not limit the type of the weakened portion 431. The weakened portion 431 may be, for example, a ring groove provided on the circumferential surface of the guide post 42, or be surrounded by a plurality of small holes in a ring shape, or for the The weakened portion 431 is made of materials with weaker structural strength.

Also, please refer to numbers 1 and 2. In order to facilitate the manipulation of pulling out or pushing in the key holder 41 and manipulating the key holder 41 to rotate, the rotating assembly 4 may also have a manipulation portion 44 connected to the key holder 41 At one end far away from the end plate 23, the manipulation portion 44 can be integrally formed to connect to the key holder 41, or for example to be pin-connected to the key holder 41, and the present invention is not limited.

Please refer to Figures 3 and 6, a user with the key K can pull the control portion 44 to cause the key holder 41 to move axially away from the end plate 23 and expose the key positioning groove 411. For the user to place the key K in the key positioning slot 411. Continue to move the key holder 41 toward the end plate 23 of the inner sleeve 2 so that the positioning members 32 are pushed upward by the key K, and the locking members 31 are also driven to move upward. And compress the reset pieces 33 to the state shown in Fig. 7, so that the boundary between the alignment piece 32 and the latching piece 31 corresponding to each group can be positioned exactly on the outer sleeve 1 and the inner sleeve 1 The boundary of the sleeve 2; that is, the key K switches the lock assembly 3 from the locked state (as shown in Figure 6) to the unlocked state (as shown in Figure 7). In this way, as long as the manipulation portion 44 is rotated again, the key holder 41 can be linked to the inner sleeve 2 to rotate synchronously with respect to the outer sleeve 1, so that the actuating portion 24 of the inner sleeve 2 can link the concealed lock The lock bolt of the lock to be applied to the core is unlocked.

Please refer to Figures 3 and 8, when a user who does not have the key K (marked in Figure 2) (such as Xiao Xiao who wants to unlock and steal) pulls out the key holder 41 and clamps it with a tool T The circumferential surface of the key holder 41 and vigorously rotate the key holder 41 in an attempt to destroy the latching parts 31 of the lock assembly 3 with shear force, in order to forcibly drive the inner sleeve 2 relative to the outer sleeve 1 When rotating to achieve the purpose of unlocking, because the interlocking pin 43 of the hidden lock core is provided with the weakened portion 431, and the structural strength of the interlocking pin 43 at the weakened portion 431 is less than the structural strength of the latch 31; therefore, it is compulsory In the process of rotating the key holder 41 to rotate the inner sleeve 2, before the latch 31 is damaged by the shear force, the interlocking pin 43 can firstly form a fracture at the weakened portion 431, resulting in the key holder 41 It forms idling relative to the inner sleeve 2 (as shown in FIG. 9 ), so the key holder 41 will no longer be able to rotate the inner sleeve 2 relative to the outer sleeve 1 through the interlocking pin 43. In this way, although the hidden lock core has been damaged and must be replaced, it can be ensured that the user who hardly turns the key holder 41 without the key K will not be able to unlock it, so the hidden lock core can indeed provide a good anti-theft effect.

Please refer to Figure 10, which is the second embodiment of the hidden lock cylinder of the present invention. In this embodiment, the key holder 41 of the rotating assembly 4 can be optionally divided into a first seat body 41a and a first seat body 41a and a second seat body 41a adjacent in the axial direction. The two seat bodies 41b are also matched with a safety pin 45, so that the first seat body 41a and the second seat body 41b can be relatively idling when damaged by improper external force, so as to further enhance the anti-theft of the hidden lock core effect.

Please refer to Figures 10 and 11. In detail, the surface of the first seat 41a facing the second seat 41b may have a groove 414, and the inner wall of the groove 414 has at least one rotating protrusion 415 . The surface of the second seat body 41 b facing the first seat body 41 a may correspondingly have a protrusion 416, and the outer circumferential surface of the protrusion 416 may have a ring groove 417. The second seat 41b can be penetrated by the protrusion 416 into the groove 414 of the first seat 41a, and the at least one rotating protrusion 415 can be aligned and penetrated into the ring groove 417 (please refer to Fig. 12 for cooperation) As shown), the first seat body 41a and the second seat body 41b can be relatively rotated without other limiting structures. In this embodiment, the circumferential surface of the first seat 41a has the key positioning groove 411, the interlocking pin 43 is combined with the first seat 41a and penetrates the guide rail 421 of the guide post 42, the second seat 41b can be connected to the manipulation portion 44; in other embodiments, the opposite can be provided, and the present invention is not limited.

In addition, the safety pin 45 can be fixedly connected to the first seat body 41a and the second seat body 41b to restrict the first seat body 41a and the second seat body 41b from being able to rotate relative to each other in a normal use state. Wherein, the safety pin 45 may have at least one weakened portion 451 on the circumferential surface of the protrusion 416 (as shown in Figures 11 and 12), so that the structural strength of the safety pin 45 at the weakened portion 451 can be smaller than the The structural strength of the locking member 31, and the present invention also does not limit the type of the weakened portion 451.

Please refer to Figures 11 and 13, according to the aforementioned structure, when a user who does not have the key K (marked in Figure 2) does not pull out the key holder 41, the tool T can be clamped directly When holding the control portion 44 (or the outer end of the second seat 41b) and rotating vigorously, the control portion 44 will be able to rotate the second seat 41b together. Before the latch 31 is damaged by the shear force, the The safety pin 45 can firstly form a fracture at its weakened portion 451, causing the second seat body 41b to form an idling relative to the first seat body 41a (as shown in Figure 13), so the second seat body 41b will not be able to advance. The part drives the first seat 41a to rotate, let alone the first seat 41a to drive the inner sleeve 2 to rotate. In this way, although the hidden lock core has been damaged and must be replaced, it can be ensured that the user who hardly turns the control part 44 without the key K will not be able to unlock it. Therefore, the hidden lock core can indeed provide a good anti-theft effect.

In addition, even if the user causes the second seat body 41b to spin freely with respect to the first seat body 41a, he further pulls out the key seat 41, and the tool T clamps the first seat body 41a. When the circumferential surface is rotated vigorously, as described in the first embodiment, the interlocking pin 43 will be broken and damaged, and the first seat body 41a will be idling relative to the inner sleeve 2. Therefore, in this embodiment, in addition to preventing the hidden lock cylinder from being cracked when the key holder 41 is pulled out by the linkage pin 43, the safety pin 45 can further prevent the hidden lock cylinder from being broken. When the key holder 41 is pulled out, it is cracked, and has a dual anti-theft mechanism to improve the anti-theft effect.

Please refer to Figure 14, which is the third embodiment of the concealed lock cylinder of the present invention. In this embodiment, a lock strip type of the lock assembly 3 can be selected, that is, the lock assembly 3 has several latches 31. It can be a lock row piece, and each lock row piece has a pair of protrusions 311. When the lock assembly 3 is in an unlocked state, the positioning protrusions 311 of the lock row pieces are not aligned in a straight line, so that the corresponding key K The unlocking groove K2 can form a serpentine groove.

In detail, the outer sleeve 1 of this embodiment can use the diameter difference of the inner wall to form the first locking area 11, and the inner wall of the inner sleeve 2 is formed with a plurality of stop ring grooves to form the second locking area 21, and the plurality of limit ring grooves penetrate through the left and right sides of the inner sleeve 2, so that when the lock assembly 3 is in a locked state, the plurality of latches 31 can partially penetrate their corresponding limit rings The groove extends into the first locking area 11 and is located at the boundary between the outer sleeve 1 and the inner sleeve 2 so that the outer sleeve 1 and the inner sleeve 2 cannot rotate relative to each other. In contrast, when the key K is displaced into the second locking area 21 of the inner sleeve 2, the unlocking groove K2 of the key K can drive the plurality of positioning protrusions 311 to move left and right, so that the plurality of The latching member 31 is driven to the center so that the latching members 31 will not extend into the first latching area 11 of the outer sleeve 1, so as to convert the latching assembly 3 into an unlocked state, so that the outer sleeve The barrel 1 and the inner sleeve 2 can rotate relatively.

In addition, the rotating assembly 4 of this embodiment can also divide the key holder 41 into a first seat 41a and a second seat 41b that are axially adjacent, and the guide post 42, the linkage pin 43, and the control The structure of the part 44 and the insurance pin 45 are similar to the aforementioned second embodiment, so they will not be described in detail here, and only the differences will be described below.

The guide rail 421 of the guide post 42 of this embodiment can be recessed on the circumferential surface of the guide post 42 without penetrating the shape of the guide post 42, so that the linkage pin 43 can be combined with the first seat 41a and penetrated from one end The guide rail 421 and the weakened portion 431 of the interlocking pin 43 are also oppositely located on the circumferential surface of the guide post 42. Wherein, since the interlocking pin 43 does not penetrate the guide post 42, the circumferential surface of the guide post 42 of this embodiment may have another displacement surface 423, which is generally opposed to the guide rail 421 in a radial direction, and is matched with An abutting post 46 that is radially opposite to the linkage pin 43 is combined with the first seat 41a by the abutting post 46, and one end of the abutting post 46 penetrates the axial passage 412 and abuts the displacement surface 423 , Which can assist in improving the stability of the key holder 41 relative to the inner sleeve 2 when axially displaced.

According to the foregoing structure, the concealed lock cylinder of this embodiment can also rotate the manipulation portion 44 to rotate the second seat 41b without pulling out the key holder 41, when the latch 31 is received Before the shear failure, the safety pin 45 can firstly form a fracture failure at the weakened portion 451, causing the second seat body 41b to form an idling rotation relative to the first seat body 41a. And, when the key holder 41 is pulled out to rotate the first seat body 41a, before the locking member 31 is damaged by the shear force, the interlocking pin 43 can firstly form a fracture and damage at the weakened portion 431, causing the The first seat body 41a is idling with respect to the inner sleeve 2. Therefore, this embodiment can also have a dual anti-theft mechanism to achieve the effect of enhancing the anti-theft effect.

In summary, the concealed lock core of the present invention can conceal its lock assembly, and cannot use tools to damage the lock assembly from the outside of the hidden lock core, and has a good anti-theft effect. In addition, when the key holder is rotated by improper external force, the safety pin and/or the interlocking pin can also be broken and damaged, causing the key holder itself or relative to the inner sleeve to form idling, so as to ensure that the lock assembly does not Will be destroyed and unlocked. In addition, the key used with the hidden lock core can be extremely difficult to be cracked and copied by setting the unlocking slot on the curved surface.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art without departing from the spirit and scope of the present invention may make various changes and modifications relative to the above-mentioned embodiments. The technical scope of the invention is protected. Therefore, the scope of protection of the invention shall be subject to the scope of the attached patent application.

﹝this invention﹞ 1: Outer sleeve 11: The first lock area 2: inner sleeve 21: The second lock area 22: opening 23: End plate 24: Actuation Department 3: Locking component 31: Cards 311: Alignment protrusion 32: counterpoint 33: reset piece 4: Rotating components 41: key holder 41a: The first block 41b: second block 411: key positioning slot 412: Axial channel 413: first shoulder 414: Groove 415: Rotating convex part 416: bump 417: Ring Groove 42: guide post 421: Rail 422: second shoulder 423: Displacement Surface 43: Interlocking pin 431: Weakening Department 44: Control Department 45: Insurance sales 451: Weakening Department 46: Arrival 5: lock shell K: key K1: curved surface K2: unlock slot T: Tools ﹝Used ﹞ 9: Lock anti-theft device 91: Lock body 911: keyhole 92: cover sheet 921: hole 93: Magnetic board 931: Through hole 94: decorative cover 95: key 951: tooth

[Picture 1] A diagram of a conventional lock anti-theft device. [Figure 2] An exploded perspective view of the first embodiment of the present invention. [Figure 3] The combined cross-sectional view of the first embodiment of the present invention. [Figure 4] A cross-sectional view along the line A-A in Figure 3. [Figure 5] A cross-sectional view along the line B-B in Figure 4. [Figure 6] A cross-sectional view of the first embodiment of the present invention with the key holder pulled out. [Figure 7] A cross-sectional view of the push-in key holder according to the first embodiment of the present invention. [Figure 8] The first embodiment of the present invention uses a tool to rotate the pulled-out key holder. [Figure 9] A cross-sectional view along the line C-C in Figure 8. [Figure 10] An exploded perspective view of the second embodiment of the present invention. [Figure 11] The second embodiment of the present invention uses a tool to rotate the key holder that has not been pulled out. [Picture 12] A cross-sectional view along the line D-D in Fig. 11. [Figure 13] As shown in Figure 12, the second base body is idling relative to the first base body. [Figure 14] An exploded perspective view of the third embodiment of the present invention.

1: Outer sleeve

11: The first lock area

2: inner sleeve

21: The second lock area

22: opening

23: End plate

24: Actuation Department

3: Locking component

31: Cards

32: counterpoint

33: reset piece

4: Rotating components

41: key holder

411: key positioning slot

412: Axial channel

413: first shoulder

42: guide post

421: Rail

422: second shoulder

43: Interlocking pin

431: Weakening Department

44: Control Department

5: lock shell

K: key

K1: curved surface

K2: unlock slot

Claims (13)

A hidden lock cylinder, including: An outer sleeve with a first locking area; An inner sleeve located in the outer sleeve, the inner sleeve having a second locking area aligned with the first locking area; A lock assembly is located at the first lock area and the second lock area. When the lock assembly is in a locked state, several latches are located at the boundary between the outer sleeve and the inner sleeve; and A rotating assembly is combined with the inner sleeve and has a key holder arranged in the inner sleeve so as to be axially displaceable. The circumferential surface of the key holder has a key positioning groove. Rotating the key holder can link the inner sleeve The barrel rotates relative to the outer sleeve. For example, the concealed lock cylinder of claim 1, wherein the circumferential surface of the key holder is circular. For example, the hidden lock core of claim 2 further includes a key, and the key is placed in the key positioning slot. When the key positioning slot is located in the second lock area of the inner sleeve, the key will lift the lock assembly from the top The locked state is switched to the unlocked state. For example, the hidden lock core of claim 3, wherein the key has an arc surface facing the second lock area, and the arc of the arc is consistent with the arc of the circumferential surface of the key holder. For example, the hidden lock cylinder of claim 4, wherein the curved surface has a plurality of lock bead holes arranged in a two-dimensional array. For example, the concealed lock cylinder of claim 1, wherein the rotating assembly has a linkage pin combined with the key holder, and rotates the inner sleeve when the key holder is rotated, the linkage pin has at least one weakened portion, and the linkage pin is The structural strength of the weakened portion is less than the structural strength of the latch. When the lock assembly is in the locked state, rotating the key holder causes the interlocking pin to fracture at the weakened portion, and the key holder will be relative to the inner sleeve. The cylinder is idling. For example, the hidden lock cylinder of claim 6, wherein the rotating assembly has a guide post located in the inner sleeve, the guide post is combined with the inner sleeve and penetrates into an axial channel of the key holder, the interlocking pin When the key holder is combined with the key holder and penetrates into a guide rail of the guide post, when the key holder is axially displaced relative to the inner sleeve, the interlocking pin synchronously moves along the guide rail, and the weakened portion of the interlocking pin is positioned on the guide post的环面。 The circumferential surface. For example, the hidden lock cylinder of claim 7, wherein the guide rail penetrates two opposite sides of the circumferential surface of the guide post, the linkage pin penetrates the guide rail, the number of weakened portions of the linkage pin is two, and the two weakened portions are respectively Align the circumferential surface of the guide post. For example, the concealed lock cylinder of claim 7, wherein the inner sleeve has an opposite opening and an end plate, and the rotating assembly has an operating portion connected to an end of the key holder away from the end plate. Such as the hidden lock cylinder of claim 9, wherein the key holder has a first shoulder located in the axial passage adjacent to the end plate, and the end of the guide post located in the axial passage forms a second shoulder When the key holder is pulled out, the first shoulder abuts against the second shoulder. For example, the concealed lock cylinder of claim 7, wherein the key seat is divided into a first seat body and a second seat body that are axially adjacent, and the inner wall surface of a groove of the first seat body has at least one rotating convex Part, the second seat body has a convex block penetrating into the groove of the first seat body, the at least one rotating convex part aligningly penetrates into a ring groove of the convex block, and a safety pin is fixed to the first seat body With the second base body, the safety pin has at least one weakened portion opposite to the circumferential surface of the convex block, and the structural strength of the safety pin at the weakened portion is less than the structural strength of the latch. For example, the concealed lock cylinder of claim 11, wherein the interlocking pin is combined with the first seat body, the key positioning groove is located on the circumferential surface of the first seat body, and the rotating assembly has a manipulation portion connected to the second seat body . For example, the hidden lock core of claim 1 further includes a lock shell, and the outer sleeve is located in the lock shell and combined with the lock shell.

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