Locks with bead-in-bead anti-theft structure

Abstract

This utility model discloses a lock with a bead-in-bead anti-theft structure, including a lock shell, a lock cylinder, an upper bead assembly, and a lower bead assembly. The lock shell has a shell hole, and the lock cylinder has a core hole. The upper bead assembly includes several upper beads that are sequentially nested and can move relative to each other, and the lower bead assembly includes several lower beads that are sequentially nested and can move relative to each other. When the shell hole and the core hole are connected, several upper beads abut against several lower beads respectively. When several upper beads and several lower beads abut against each other at the connection between the shell hole and the core hole, the lock cylinder can rotate relative to the lock shell. When at least one upper bead abuts against a corresponding lower bead at a position away from the connection between the shell hole and the core hole, the rotation of the lock cylinder relative to the lock shell is restricted. Because this lock with a bead-in-bead anti-theft structure unlocks when several upper beads and several lower beads abut against each other at the connection between the shell hole and the core hole, and locks when at least one upper bead abuts against a corresponding lower bead at a position away from the connection between the shell hole and the core hole, the lock's locking / unlocking is complex, and its anti-theft performance is excellent.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and in particular to a lock with a bead-in-bead anti-theft structure. Background Technology

[0002] A lock is a device installed on a door for anti-theft purposes. Existing pin tumbler locks include a lock case, a lock cylinder, an upper pin, and a lower pin. The lock cylinder has a keyhole, the lock case has a housing hole for the upper pin, and the lock cylinder has a core hole for the lower pin. The lock cylinder is located inside the lock case and can rotate relative to the lock case, allowing the core hole to connect with the housing hole. When locking a pin tumbler lock, the core hole and housing hole are connected, and the upper pin is inserted into the core hole, restricting the rotation of the lock cylinder relative to the lock case. When unlocking a pin tumbler lock, the key is inserted into the keyhole, causing the lower pin to move upward and push against the upper pin. When the upper and lower pins abut against each other at the connection point between the housing hole and the core hole, the lock cylinder can rotate relative to the lock case to unlock. Because existing pin tumbler locks lock by the upper pin moving downward to insert into the core hole and unlock by the lower pin moving upward to push against the upper pin, the locking / unlocking structure is simple, but the anti-theft performance is poor. Summary of the Invention

[0003] The purpose of this utility model is to provide a lock with a pin-in-pin anti-theft structure to solve the problem that existing pin-type locks have a simple locking / unlocking structure and poor anti-theft performance, which involves the upper pin moving down to insert into the core hole to lock and the lower pin moving up to push the upper pin to unlock.

[0004] This utility model is achieved through the following technical solution:

[0005] A lock with a bead-in-bead anti-theft structure includes a lock case, a lock cylinder, an upper bead assembly, and a lower bead assembly. The lock case has a case hole for accommodating the upper bead assembly, and the lock cylinder has a core hole for accommodating the lower bead assembly. The lock cylinder is disposed within the lock case and can rotate relative to the lock case to communicate with the case hole. The upper bead assembly includes a plurality of upper beads, which are sequentially sleeved and can move relative to each other in the axial direction of the case hole. The lower bead assembly includes a plurality of lower beads, which are sequentially sleeved and can move relative to each other in the axial direction of the core hole. When the case hole and the core hole are in communication, the plurality of upper beads abut against the plurality of lower beads respectively. When the plurality of upper beads and the plurality of lower beads abut against each other at the point where the case hole and the core hole are in communication, the lock cylinder can rotate relative to the lock case. When at least one upper bead abuts against a corresponding lower bead at a position away from the point where the case hole and the core hole are in communication, the rotation of the lock cylinder relative to the lock case is restricted.

[0006] Furthermore, there are two upper beads and two lower beads. Of the two upper beads, one upper bead is defined as the upper outer bead and the other upper bead is defined as the upper inner bead. The upper outer bead is fitted over the upper inner bead. Of the two lower beads, one lower bead is positioned as the lower outer bead and the other lower bead is defined as the lower inner bead. The lower outer bead is fitted over the lower inner bead.

[0007] Furthermore, a first elastic element is provided inside the shell hole, and the upper outer bead is driven by the first elastic element to be inserted into the core hole.

[0008] Furthermore, the upper outer bead has an upper bead hole for accommodating the upper inner bead, and the lower outer bead has a lower bead hole for accommodating the lower inner bead. A second elastic element is provided in the upper bead hole, and the upper inner bead is driven to be inserted into the lower bead hole by the second elastic element.

[0009] Furthermore, the upper inner bead is provided with a hanging rod extending out of the upper bead hole in a direction away from the lower inner bead. The hanging rod can abut against the upper outer bead when the upper inner bead is inserted into the lower bead hole, thereby restricting the upper inner bead from detaching from the upper outer bead. The second elastic member passes through the hanging rod.

[0010] Furthermore, the outer wall of the lower outer bead is provided with a first shoulder, and the wall of the core hole is provided with a second shoulder. When the lower outer bead moves downward and deviates from the upper opening of the core hole, the first shoulder can abut against the second shoulder, thereby restricting the lower outer bead from moving away from the core hole.

[0011] Furthermore, the lower outer bead has a lower bead hole for accommodating the lower inner bead, the outer wall of the lower inner bead is provided with a third shoulder, and the wall of the lower bead hole is provided with a fourth shoulder. When the lower inner bead moves downward and deviates from the upper opening of the core hole, the third shoulder can abut against the fourth shoulder, thereby restricting the lower inner bead from moving away from the lower bead hole.

[0012] Furthermore, the shell hole and the core hole extend radially in the lock housing, and there are several upper pin groups, the lower pin group, the shell hole and the core hole, which correspond one-to-one. Several upper pin groups are spaced apart axially in the lock housing.

[0013] Furthermore, the lock cylinder has a keyhole located on the side of the lower pin group opposite to the upper pin group and communicating with the core hole.

[0014] Furthermore, the lock cylinder is provided with a locking rod and a locking block. The locking rod is located on one radial side of the lower pin assembly. The locking rod has an unlocking block extending into the keyhole on one radial side and an unlocking groove on the other radial side. The locking rod can move relative to the lock cylinder to the unlocking position. The locking block can move into or out of the unlocking groove. When the locking rod moves away from the unlocking position, the locking block moves out of the unlocking groove and abuts against the locking rod to restrict the rotation of the lock cylinder. When the locking rod moves to the unlocking position, the locking block can move into the unlocking groove to release the lock cylinder.

[0015] The advantage of this technical solution is that by configuring an upper pin group on the lock shell and a lower pin group on the lock cylinder, the upper pin group includes several upper pins that are sequentially sleeved from the inside out and can move relative to each other in the axial direction of the cylinder hole, and the lower pin group includes several lower pins that are sequentially sleeved from the inside out and can move relative to each other in the axial direction of the shell hole. Since this lock with a pin-in-pin anti-theft structure unlocks when several upper pins and several lower pins abut against each other at the connection between the shell hole and the cylinder hole, and locks when at least one upper pin and the corresponding lower pin abut against each other at a position away from the connection between the shell hole and the cylinder hole, the locking / unlocking of the lock is complex and the anti-theft performance is excellent. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a perspective view of a lock with a bead-in-bead anti-theft structure according to an embodiment of the present invention;

[0019] Figure 2 This is a top view of a lock with a bead-in-bead anti-theft structure according to an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 A cross-sectional view at point AA (several upper and lower beads abut against each other at the connection between the shell hole and the core hole).

[0021] Figure 4 yes Figure 3 A magnified view of a section at point C;

[0022] Figure 5 yes Figure 2Cross-sectional view at point AA (the upper bead and the corresponding lower bead are aligned at the point where they are offset from the connection between the shell hole and the core hole).

[0023] Figure 6 yes Figure 5 A magnified view of a section at point D;

[0024] Figure 7 yes Figure 2 Sectional view at point BB;

[0025] Figure 8 This is an exploded view of a lock with a bead-in-bead anti-theft structure according to an embodiment of the present invention;

[0026] Figure 9 This is a perspective view of a key used in conjunction with a lock having a bead-in-bead anti-theft structure according to an embodiment of this utility model. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example: Figure 1-8 As shown, the lock with the bead-in-bead anti-theft structure includes a lock shell 1, a lock cylinder 2, an upper pin assembly 3 and a lower pin assembly 4. The lock shell 1 has a shell hole 101 for accommodating the upper pin assembly 3, and the lock cylinder 2 has a core hole 201 for accommodating the lower pin assembly 4. The lock cylinder 2 is located inside the lock shell 1 and can rotate relative to the lock shell 1 to make the core hole 201 communicate with the shell hole 101.

[0029] The upper ball set 3 includes several upper ball sets 301, which are sequentially sleeved from the inside to the outside and can move relative to each other in the axial direction of the shell hole 101. The lower ball set 4 includes several lower ball sets 401, which are sequentially sleeved from the inside to the outside and can move relative to each other in the axial direction of the core hole 201.

[0030] When the shell hole 101 is connected to the core hole 201, a number of upper bead 301 abut against a number of lower bead 401 respectively. When the upper bead 301 and the lower bead 401 abut against each other at the connection between the shell hole 101 and the core hole 201, the lock cylinder 2 can rotate relative to the lock shell 1. When at least one upper bead 301 abuts against the corresponding lower bead 401 at a position away from the connection between the shell hole 101 and the core hole 201, the rotation of the lock cylinder 2 relative to the lock shell 1 is restricted.

[0031] The lock cylinder 2 has a keyhole 203, which is located on the side of the lower pin group 4 away from the upper pin group 3 and is connected to the core hole 201.

[0032] The connection between the shell hole 101 and the core hole 201 specifically refers to the lower opening of the shell hole 101 or the upper opening of the core hole 201 when the shell hole 101 and the core hole 201 are connected.

[0033] like Figure 3-4 As shown, several upper bead 301 and several lower bead 401 abut against each other at the connection between the shell hole 101 and the core hole 201.

[0034] like Figure 5-6 As shown, the upper bead 301 and the corresponding lower bead 401 abut against each other at the position away from the connection between the shell hole 101 and the core hole 201.

[0035] like Figure 9 As shown, the key 7 used in conjunction with the lock having a bead-in-bead anti-theft structure has several key portions 701, and each key portion 701 corresponds to a number of lower beads 401.

[0036] When the lock with the bead-in-bead anti-theft structure is locked, the shell hole 101 is connected to the core hole 201. Under the action of gravity, the upper ball set 3 moves down and inserts into the core hole 201. At this time, a number of upper balls 301 and a number of lower balls 401 abut against each other at a position away from the connection between the shell hole 101 and the core hole 201, restricting the rotation of the lock cylinder 2 and realizing the locking of the lock.

[0037] When key 7 is inserted into keyhole 203, several key parts 701 abut against several lower bead 401 respectively, causing several lower bead 401 to move upward and push against several upper bead 301, so that several upper bead 301 and several lower bead 401 abut against each other at the connection between shell hole 101 and core hole 201, so that lock cylinder 2 can rotate relative to lock shell 1, thereby unlocking the lock.

[0038] In summary, this embodiment provides a lock with a pin-in-pin anti-theft structure to solve the problem of existing pin-type locks that lock by lowering the upper pin and inserting it into the core hole, and unlock by raising the lower pin and pushing against the upper pin. This results in a simple locking / unlocking structure with poor anti-theft performance. The solution mainly involves configuring an upper pin group 3 on the lock housing 1 and a lower pin group 4 on the lock cylinder 2. The upper pin group 3 includes several upper pins 301 that are sequentially nested from the inside out and can move relative to each other axially in the core hole 201. The lower ball assembly 4 includes several lower balls 401 that are sequentially sleeved from the inside out and can move relative to each other in the axial direction of the housing hole 101. Since the lock with the ball-in-ball anti-theft structure unlocks when several upper balls 301 and several lower balls 401 abut against each other at the connection between the housing hole 101 and the core hole 201, and locks when at least one upper ball 301 and the corresponding lower ball 401 abut against each other at a position away from the connection between the housing hole 101 and the core hole 201, the lock has a complex locking / unlocking mechanism and good anti-theft performance.

[0039] In this embodiment of the invention, there are two upper bead 301s and two lower bead 401s. Of the two upper bead 301s, one is defined as the upper outer bead 302, and the other is defined as the upper inner bead 303. The upper outer bead 302 is fitted over the upper inner bead 303. Of the two lower bead 401s, one is positioned as the lower outer bead 402, and the other is defined as the lower inner bead 403. The lower outer bead 402 is fitted over the lower inner bead 403. By configuring two upper bead 301s and two lower bead 401s, the lock with the bead-in-bead anti-theft structure has complex locking / unlocking capabilities and excellent anti-theft performance, while also ensuring a reasonable number of upper bead 301s and lower bead 401s and simple assembly.

[0040] In this embodiment of the invention, the shell hole 101 and the core hole 201 extend radially in the lock shell 1. There are multiple upper pin assemblies 3, lower pin assemblies 4, shell holes 101, and core holes 201, all corresponding to each other. The multiple upper pin assemblies 3 are spaced apart axially in the lock shell 1. This arrangement, by configuring multiple upper pin assemblies 3 and lower pin assemblies 4 and spaced apart axially in the lock shell 1, gives the lock with the pin-in-pin anti-theft structure excellent anti-theft performance.

[0041] In this embodiment of the invention, a first elastic element 102 is provided inside the shell hole 101, and the upper outer bead 302 is driven by the first elastic element 102 to insert into the core hole 201. This arrangement, by configuring the first elastic element 102 inside the shell hole 101 to drive the upper outer bead 302 into the core hole 201, allows the upper outer bead 302 to quickly insert into the core hole 201 when the key 7 is pulled out of the keyhole 203, thus achieving rapid locking of the lock cylinder 2.

[0042] In this embodiment of the invention, the upper outer bead 302 has an upper bead hole 304 for accommodating the upper inner bead 303, and the lower outer bead 402 has a lower bead hole 404 for accommodating the lower inner bead 403. A second elastic element 305 is provided in the upper bead hole 304, and the upper inner bead 303 is driven into the lower bead hole 404 by the second elastic element 305. This arrangement, by configuring the second elastic element 305 in the upper bead hole 304 to drive the upper inner bead 303 into the lower bead hole 404, allows the upper inner bead 303 to quickly insert into the lower bead hole 404 when the key 7 is pulled out of the keyhole 203, thus achieving multiple locking of the lock cylinder 2.

[0043] In this embodiment of the invention, the upper inner bead 303 is provided with a hanging rod 306 extending out of the upper bead hole 304 in a direction opposite to that of the lower inner bead 403. The hanging rod 306 can abut against the upper outer bead 302 to restrict the upper inner bead 303 from moving downward and disengaging from the upper outer bead 302. This arrangement, by configuring the hanging rod 306 on the upper inner bead 303 to abut against the upper outer bead 302 and restrict the upper inner bead 303 from moving downward and disengaging from the upper outer bead 302, prevents the upper inner bead 303 from excessively moving downward and disengaging from the upper outer bead 302 when inserted into the lower bead hole 404.

[0044] In this embodiment of the invention, the second elastic element 305 is inserted through the hanging rod 306. This arrangement, by configuring the second elastic element 305 to pass through the hanging rod 306, ensures stable assembly of the second elastic element 305 and provides excellent driving performance.

[0045] In this embodiment of the invention, the outer wall of the lower outer bead 402 is provided with a first shoulder 405, and the wall of the core hole 201 is provided with a second shoulder 202. The first shoulder 405 abuts against the second shoulder 202 when the lower outer bead 402 moves downward and deviates from the upper opening of the core hole 201, thus restricting the lower outer bead 402 from moving away from the core hole 201. The above arrangement, by configuring the first shoulder 405 on the lower outer bead 402 and configuring the second shoulder 202 on the core hole 201 to abut against the first shoulder 405, prevents the lower outer bead 402 from detaching from the core hole 201 when it moves downward and deviates from the upper opening of the core hole 201.

[0046] In this embodiment of the invention, the outer wall of the lower inner bead 403 is provided with a third shoulder 406, and the wall of the lower bead hole 404 is provided with a fourth shoulder 407. The third shoulder 406 abuts against the fourth shoulder 407 when the lower inner bead 403 moves downward away from the upper opening of the core hole 201, thus restricting the lower inner bead 403 from moving away from the lower bead hole 404. This arrangement, by configuring the third shoulder 406 on the lower inner bead 403 and the fourth shoulder 407 abutting against the third shoulder 406 on the lower bead hole 404, prevents the lower inner bead 403 from detaching from the lower outer bead 402 when it moves downward away from the upper opening of the core hole 201.

[0047] In this embodiment of the invention, the lock cylinder 2 is provided with a locking rod 5 and a locking block 6. The locking rod 5 is located on one radial side of the lower pin assembly 4. The locking rod 5 has an unlocking block 501 extending into the keyhole 203 on one radial side and an unlocking groove 502 on the other radial side. The locking rod 5 can move relative to the lock cylinder 2 to the unlocking position. The locking block 6 can move into or out of the unlocking groove 502. When the locking rod 5 moves away from the unlocking position, the locking block 6 moves out of the unlocking groove 502 and abuts against the locking rod 5 to restrict the rotation of the lock cylinder 2. When the locking rod 5 moves to the unlocking position, the locking block 6 can move into the unlocking groove 502 to release the lock cylinder 2. Specifically, when the locking block 6 moves out of the unlocking groove 502, it abuts against the lock housing 1 and the locking rod 5 respectively to restrict the rotation of the lock cylinder 2. When the locking block 6 moves into the unlocking groove 502, it disengages from the lock housing 1 and releases the lock cylinder 2.

[0048] The key 7 has an unlocking guide groove 702 that slides with the unlocking block 501. When the key 7 is inserted into the keyhole 203, the unlocking block 501 moves along the unlocking guide groove 702, causing the locking rod 5 to move to the unlocked position. When the key 7 is pulled out of the keyhole 203, the locking rod 5 moves away from the unlocked position. This configuration, by arranging the locking rod 5 and the locking block 6 within the lock cylinder 2 to interact and lock the cylinder 2, gives the lock with the bead-in-bead anti-theft structure a good anti-theft effect.

[0049] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] The above description provides one or more embodiments in conjunction with specific content, and does not imply that the specific implementation of this utility model is limited to these descriptions. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered as protected by this utility model.

Claims

1. A lock with a bead-within-a-bead anti-theft structure, characterized in that, The lock includes a lock case, a lock cylinder, an upper pin assemblies, and a lower pin assemblies. The lock case has a shell hole for accommodating the upper pin assemblies, and the lock cylinder has a core hole for accommodating the lower pin assemblies. The lock cylinder is disposed inside the lock case and can rotate relative to the lock case to allow the core hole to communicate with the shell hole. The upper ball bearing assembly includes several upper ball bearings, which are sequentially sleeved and can move relative to each other in the axial direction of the shell hole. The lower ball bearing assembly includes several lower ball bearings, which are sequentially sleeved and can move relative to each other in the axial direction of the core hole. When the shell hole and the core hole are connected, the upper bead abuts against the lower bead respectively. When the upper bead and the lower bead abut against each other at the connection between the shell hole and the core hole, the lock cylinder can rotate relative to the lock shell. When at least one upper bead abuts against the corresponding lower bead at a position away from the connection between the shell hole and the core hole, the rotation of the lock cylinder relative to the lock shell is restricted.

2. The lock with a bead-in-bead anti-theft structure according to claim 1, characterized in that, There are two upper beads and two lower beads. Of the two upper beads, one upper bead is defined as the upper outer bead and the other upper bead is defined as the upper inner bead. The upper outer bead is fitted over the upper inner bead. Of the two lower bead sets, one lower bead is positioned as the lower outer bead, and the other lower bead is defined as the lower inner bead, with the lower outer bead fitted over the lower inner bead.

3. The lock with a bead-in-bead anti-theft structure according to claim 2, characterized in that, The shell hole is provided with a first elastic element, and the upper outer ball is driven by the first elastic element to be inserted into the core hole.

4. The lock with a bead-in-bead anti-theft structure according to claim 2, characterized in that, The upper outer bead has an upper bead hole for accommodating the upper inner bead, and the lower outer bead has a lower bead hole for accommodating the lower inner bead. A second elastic element is provided in the upper bead hole, and the upper inner bead is driven to be inserted into the lower bead hole by the second elastic element.

5. The lock with a bead-in-bead anti-theft structure according to claim 4, characterized in that, The upper inner bead is provided with a hanging rod that extends out of the upper bead hole in a direction away from the lower inner bead. The hanging rod can abut against the upper outer bead when the upper inner bead is inserted into the lower bead hole, thereby preventing the upper inner bead from detaching from the upper outer bead. The second elastic member is passed through the hanging rod.

6. The lock with a bead-in-bead anti-theft structure according to claim 2, characterized in that, The outer wall of the lower outer bead is provided with a first shoulder, and the wall of the core hole is provided with a second shoulder. When the lower outer bead moves downward and deviates from the upper opening of the core hole, the first shoulder can abut against the second shoulder, thereby restricting the lower outer bead from moving away from the core hole.

7. The lock with a bead-in-bead anti-theft structure according to claim 2, characterized in that, The lower outer bead has a lower bead hole for accommodating the lower inner bead. The outer wall of the lower inner bead is provided with a third shoulder, and the wall of the lower bead hole is provided with a fourth shoulder. When the lower inner bead moves downward and deviates from the upper opening of the core hole, the third shoulder can abut against the fourth shoulder, thereby restricting the lower inner bead from moving away from the lower bead hole.

8. The lock with a bead-in-bead anti-theft structure according to claim 1, characterized in that, The shell hole and the core hole extend radially in the lock housing. There are several upper pin groups, lower pin groups, shell holes, and core holes, and they correspond one-to-one. Several upper pin groups are spaced apart axially in the lock housing.

9. The lock with a bead-in-bead anti-theft structure according to claim 1, characterized in that, The lock cylinder has a keyhole located on the side of the lower pin group opposite to the upper pin group and communicating with the core hole.

10. The lock with a bead-in-bead anti-theft structure according to claim 9, characterized in that, The lock cylinder is provided with a locking rod and a locking block. The locking rod is located on one radial side of the lower pin tumbler assembly. The locking rod has an unlocking block that extends into the keyhole on one radial side and an unlocking groove on the other radial side. The locking rod can move relative to the lock cylinder to the unlocking position. The locking block can move into or out of the unlocking groove. When the locking rod moves away from the unlocking position, the locking block moves out of the unlocking groove and abuts against the locking rod to restrict the rotation of the lock cylinder. When the locking rod moves to the unlocking position, the locking block can move into the unlocking groove to release the lock cylinder.

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