A chain lock

Abstract

The present invention relates to a chain lock, comprising a lock body, a lock head and a chain, wherein one end of the chain is connected to the lock head, and the other end of the chain is connected to the lock body, a locking cavity for inserting the lock head is provided on one side of the lock body, and a lock hole for inserting a key is provided on the other side of the lock body, and a lock core assembly is provided in the lock body, wherein the lock core assembly comprises a lock core and a locking sleeve, wherein the lock core is rotatably arranged in the lock body, the locking sleeve is fixedly arranged in the lock body, the locking sleeve is hollowly arranged to form a locking cavity, the locking sleeve has at least one locking groove, a locking column is arranged in the locking groove, an arc groove matching with the locking column is provided at the end of the lock head, an opening for partially exposing the locking column and inserting into the arc groove is provided at the bottom of the locking groove, and a pressing sheet for sliding into the locking groove to squeeze the locking column when the lock core rotates is also provided in the lock body, and the pressing sheet squeezes the locking column into the arc groove to realize locking of the lock head. In the chain lock of the present invention, the locking column forms a linear contact with the arc groove, thereby increasing the contact area between the two, and the locking effect is good.

Description

Technical Field

[0001] The invention relates to the field of hardware locks, in particular to a chain lock. Background Art

[0002] Patent application document CN200620106039.2 discloses a chain lock, which includes a lock body, a lock head and a chain. A lock core is arranged in one side of the lock body, and the other side is connected to one end of the chain. The other end of the chain is connected to the lock head. A lock head hole is arranged on the lock body, and the lock head can be inserted into the lock head hole. A steel ball is connected to one end of the lock core, and an annular groove matching the size and position of the steel ball is arranged on the lock head. The lock core controls the switch of the lock head and the lock body through the steel ball. This chain lock controls the steel ball to be clamped in the annular groove of the lock head through the lock core, so that the lock head and the lock body are fixedly connected. However, the cross section of the annular groove is an arc shape, and the steel ball and the annular groove are point contact, the contact surface is small, the fixing effect between the lock head and the lock body is poor, the lock head is easy to shake, and the transmission structure between the lock core and the steel ball is unstable, and the steel ball cannot quickly enter or leave the arc groove, so as to realize the locking and unlocking of the chain, and the operation is inconvenient. Summary of the invention

[0003] Purpose of the invention: In order to overcome the defects of the prior art, the present invention provides a chain lock, in which the locking column in the lock body forms a linear contact with the arc groove of the lock body, thereby increasing the contact area between the locking column and the arc groove, so that the fixing effect between the lock head and the lock body is better, and the chain is convenient to lock and unlock, and the use effect is good.

[0004] The technical solution of the present invention is as follows: a chain lock comprises a lock body, a lock head and a chain, one end of the chain is connected to the lock head, and the other end of the chain is connected to the lock body. A locking cavity for inserting the lock head is provided on one side of the lock body, and a lock hole for inserting the key is provided on the other side of the lock body. A lock core assembly is provided in the lock body. The lock core assembly comprises a lock core and a locking sleeve. The lock core is rotatably arranged in the lock body, and the locking sleeve is fixedly arranged in the lock body. The locking sleeve is hollow to form a locking cavity. There is at least one locking groove on the locking sleeve, and a locking column is arranged in the locking groove. An arc groove cooperating with the locking column is provided at the end of the lock head, and an opening for partially exposing the locking column and inserting it into the arc groove is provided at the bottom of the locking groove. A pressing sheet is also provided in the lock body for sliding into the locking groove to squeeze the locking column when the lock core rotates. The pressing sheet squeezes the locking column in the arc groove to achieve locking of the lock head.

[0005] By adopting the above technical scheme, the locking column in the lock body forms a linear contact with the arc groove of the lock body, which increases the contact area between the locking column and the arc groove, so that the fixing effect between the lock head and the lock body is better, and the locking and unlocking of the lock head are convenient. After the key is inserted into the keyhole and rotated forward and backward, the lock core synchronously rotates forward and backward to drive the pressure plate in and out of the locking groove. When the pressure plate slides into the locking groove, it squeezes the locking column, so that part of the locking column is exposed and stuck in the arc groove, so that the lock head can be locked. When the pressure plate slides out of the arc groove, the pressure plate does not interfere with the locking column, and the lock head can be pulled out of the locking cavity to achieve unlocking of the lock head, and the use effect is good.

[0006] The present invention is further configured as follows: there are two locking grooves, which are symmetrically arranged along the axis of the lock body, a locking column is installed in each locking groove, and there are two pressing sheets, which correspond to the locking grooves one by one.

[0007] With the above further arrangement, two locking columns are provided and are symmetrically arranged along the axis of the lock body, which has a good locking effect on the lock head and the lock head is not easy to shake.

[0008] The present invention is further configured as follows: a sliding sleeve is arranged outside the lock core, the sliding sleeve can slide along the axial direction of the lock core, the pressing piece and the sliding sleeve slide synchronously, a spiral groove is arranged on the outer periphery of the lock core, a transmission column is arranged on the inner wall of the sliding sleeve, and the transmission column is inserted in the spiral groove.

[0009] By adopting the above further arrangement, the structure is simple and the design is reasonable, so that when the lock core rotates, the sliding sleeve can slide forward and backward along the axial direction of the lock body through the cooperation of the spiral groove and the transmission column.

[0010] The present invention is further configured as follows: a mounting portion is extended outwardly from the locking sleeve, two mounting portions are provided, and are symmetrically arranged along the axial direction of the lock body, a locking groove is provided on the corresponding mounting portion, a guide groove for sliding of the pressure plate is provided on the side of the mounting portion close to the lock core, the guide groove extends along the axial direction of the lock body, and an end of the guide groove away from the lock core is connected to the locking groove.

[0011] With the above further arrangement, the pressing piece slides in the guide groove, thereby guiding the pressing piece to slide axially along the lock body.

[0012] The present invention is further configured as follows: a fixing cavity is further provided on the side wall of the lock body, a fixing head is provided on the other end of the chain, pins are installed on the two opposite inner walls of the fixing cavity, a groove matching with the pin is provided on the fixing head, and the pin part is located in the groove to realize locking of the fixing head.

[0013] With the above further configuration, a linear contact is formed between the pin shaft and the groove, thereby increasing the contact area between the pin shaft and the groove, thereby achieving a better fixing effect between the fixing head and the lock body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1This is a structural diagram of a chain locked in a specific embodiment of the present invention;

[0015] Figure 2 This is a diagram of the internal structure after the chain is locked in a specific embodiment of the present invention;

[0016] Figure 3 It is an assembly diagram between the locking sleeve, the sliding sleeve and the lock core in a specific embodiment of the present invention;

[0017] Figure 4 It is a structural diagram of a locking sleeve in a specific embodiment of the present invention;

[0018] Figure 5 It is a structural diagram of a sliding sleeve in a specific embodiment of the present invention;

[0019] Figure 6 It is a structural diagram of a lock core in a specific embodiment of the present invention;

[0020] Figure 7 It is a structural diagram of one side of the fixed cavity in a specific embodiment of the present invention;

[0021] Figure 8 It is a structural diagram of a lock in a specific embodiment of the present invention;

[0022] Fig. 9 It is a structural diagram of a fixed head in a specific embodiment of the present invention;

[0023] Fig.10 for Figure 2 A partial enlarged view of part I. DETAILED DESCRIPTION

[0024] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1-10As shown, a chain lock of the present invention comprises a lock body 1, a lock head 2 and a chain 3, one end of the chain 3 is connected to the lock head 2, and the other end of the chain 3 is connected to the lock body 1, one side of the lock body 1 is provided with a locking cavity 11 for inserting the lock head 2, and the other side of the lock body 1 is provided with a lock hole 12 for inserting a key, and a lock core assembly is arranged in the lock body 1, and the lock core assembly comprises a lock core 41 and a locking sleeve 42, the lock core 41 is rotatably arranged in the lock body 1, the locking sleeve 42 is fixedly arranged in the lock body 1, the locking sleeve 42 is hollowly arranged to form the locking cavity 11, the locking sleeve 42 has at least one locking groove 5, and a locking column 6 is arranged in the locking groove 5, an arc groove 21 cooperating with the locking column 6 is arranged at the end of the lock head 2, and an opening 51 for partially exposing the locking column 6 and inserting it into the arc groove 21 is arranged at the bottom of the locking groove 5, and a pressing sheet 7 for sliding into the locking groove 5 to squeeze the locking column 6 when the lock core 41 rotates is also arranged in the lock body 1, and the pressing sheet 7 squeezes the locking column 6 The lock head 2 is locked in the arc groove 21; there are two locking grooves 5, which are symmetrically arranged along the axial direction of the lock body 1, and a locking column 6 is installed in each locking groove 5. There are also two pressing pieces 7, which correspond to the locking grooves 5 one by one; a sliding sleeve 8 is arranged on the outer surface of the lock core 41, and the sliding sleeve 8 can slide axially along the lock core 41. The pressing piece 7 slides synchronously with the sliding sleeve 8. The pressing piece 7 is fixed or integrally arranged on the sliding sleeve 8. A spiral groove 411 is arranged on the outer periphery of the lock core 41, and a transmission column 81 is arranged on the inner wall of the sliding sleeve 8. The transmission column 81 is inserted in the spiral groove 411; a mounting portion 9 is extended outwardly from the locking sleeve 42, and two mounting portions 9 are arranged symmetrically along the axial direction of the lock body 1. The locking groove 5 is arranged on the corresponding mounting portion 9. A guide groove 91 for sliding the pressing piece 7 is opened on the side of the mounting portion 9 close to the lock core 41, and the guide groove 91 extends axially along the lock body 1. The end of the guide groove 91 away from the lock core 41 is connected to the locking groove 5. The locking column 6 in the lock body 1 forms a linear contact with the arc groove 21 of the lock body 1, which increases the contact area between the locking column 6 and the arc groove 21, so that the fixing effect between the lock head 2 and the lock body 1 is better, and the lock head 2 is not easy to shake; and the locking and unlocking of the lock head 2 are convenient. After the key is inserted into the lock hole 12 and rotated forward and backward, the lock core 41 rotates forward and backward synchronously, and the sliding sleeve 8 cooperates with the transmission column 81 through the spiral groove 411 to slide forward and backward along the axial direction of the lock body 1, driving the pressing piece 7 to enter and exit the locking groove 5. When the pressing piece 7 slides into the locking groove 5, the locking column 6 is squeezed, so that part of the locking column 6 is exposed and stuck in the arc groove 21, and the locking of the lock head 2 can be achieved. When the pressing piece 7 slides out of the arc groove 21, the pressing piece 7 does not conflict with the locking column 6, and the lock head 2 can be pulled out of the locking cavity 11 to achieve unlocking of the lock head 2, and the use effect is good.

[0026] Specifically, a resistance surface 71 is provided on one side of the pressing piece 7 close to the bottom opening 51 of the locking groove 5 . The resistance surface 71 is tilted outward to facilitate the pressing piece 7 to slide into the locking groove 5 to squeeze the locking column 6 .

[0027] In a specific embodiment of the present invention, a fixing cavity 10 is further provided on the side wall of the lock body 1, a fixing head 31 is provided on the other end of the chain 3, a pin 101 is installed on the two opposite inner walls of the fixing cavity 10, a groove 311 matching with the pin 101 is provided on the fixing head 31, and the pin 101 is partially located in the groove 311 to achieve locking of the fixing head 31. Line contact is also formed between the pin 101 and the groove 311, which increases the contact area between the pin 101 and the groove 311, so that the fixing effect between the fixing head 31 and the lock body 1 is better.

Claims

1. A chain lock, comprising a lock body, a lock head and a chain, wherein one end of the chain is connected to the lock head, and the other end of the chain is connected to the lock body, one side of the lock body is provided with a locking cavity for inserting the lock head, and the other side of the lock body is provided with a lock hole for inserting a key, and a lock core assembly is provided in the lock body, characterized in that: The lock core assembly includes a lock core and a locking sleeve. The lock core is rotatably arranged in the lock body, and the locking sleeve is fixedly arranged in the lock body. The locking sleeve is hollow to form a locking cavity. The locking sleeve has at least one locking groove, and a locking column is installed in the locking groove. An arc groove cooperating with the locking column is provided at the end of the lock head, and an opening is provided at the bottom of the locking groove for part of the locking column to be exposed and inserted into the arc groove. A pressing piece is also provided in the lock body for sliding into the locking groove to squeeze the locking column when the lock core rotates. The pressing piece squeezes the locking column in the arc groove to lock the lock head.

2. The chain lock according to claim 1, characterized in that: There are two locking grooves, which are symmetrically arranged along the axis of the lock body. A locking column is installed in each locking groove. There are also two pressing sheets, which correspond to the locking grooves one by one.

3. The chain lock according to claim 2, characterized in that: A sliding sleeve is arranged outside the lock core, and the sliding sleeve can slide along the axial direction of the lock core. The pressing piece slides synchronously with the sliding sleeve. A spiral groove is arranged on the outer periphery of the lock core, and a transmission column is arranged on the inner wall of the sliding sleeve. The transmission column is inserted in the spiral groove.

4. The chain lock according to claim 3, characterized in that: The locking sleeve has an installation portion extending outward, and there are two installation portions, which are symmetrically arranged along the axial direction of the lock body. The locking groove is arranged on the corresponding installation portion. A guide groove for the pressing plate to slide is opened on the side of the installation portion close to the lock core. The guide groove extends along the axial direction of the lock body, and the end of the guide groove away from the lock core is connected to the locking groove.

5. The chain lock according to claim 4, characterized in that: The lock body side wall is also provided with a fixed cavity, the other end of the chain is provided with a fixed head, the two opposite inner walls of the fixed cavity are equipped with pins, the fixed head is provided with a groove matching with the pin, the pin part is located in the groove, so as to lock the fixed head.

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