Three-rod coded lock
By designing a three-bar combination lock with a meshing connection structure, the problems of low security in mechanical locks and susceptibility to environmental influences in electronic locks are solved, resulting in a door lock with high security and convenient operation, while reducing maintenance complexity and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-27
AI Technical Summary
Existing mechanical locks have low security and are easily pried open or have their keys copied, while electronic locks suffer from short battery life, susceptibility to environmental factors, complex operation, and high cost.
A three-bar combination lock was designed. The combination knob is connected to the connecting rod by a gear, which ensures that the lock can only be activated when the combination knob is pressed correctly. Combined with the knob spring and snap ring, a combination of security and convenience is achieved.
It improves door lock security, has a compact structure, is easy to assemble, disassemble and maintain, and is simple to operate, reducing maintenance complexity and cost.
Smart Images
Figure CN224048873U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of door lock, specifically relates to a three -rod coded lock. BACKGROUND
[0002] As an important safety device in family and commercial buildings, the safety and convenience of door lock have always been the focus of attention. With the development of science and technology, the traditional mechanical lock has been gradually replaced by new lock such as electronic lock, intelligent lock. However, these new locks, while improving safety, also bring some new problems, such as short battery life, vulnerable to environmental influences, complex operation, etc. Therefore, there is an urgent need in the market for a door lock structure that has high security and is easy to operate.
[0003] The existing door lock is mainly divided into mechanical lock and electronic lock two categories. Mechanical lock realizes unlocking through the physical contact between key and lock core, its structure is simple, cost is low, but the safety is lower, is easy to pry or copy key. Electronic lock realizes unlocking through password, fingerprint identification and other ways, has higher security, but also has some problems, such as short battery life, vulnerable to environmental influences (such as temperature, humidity), complex operation, etc. In addition, the cost of electronic lock is higher, and the maintenance is relatively complex.
[0004] Therefore, overcoming the defects of the prior art is an urgent problem to be solved in the technical field. CONTENT OF THE UTILITY MODEL
[0005] In view of the technical problems mentioned in the background art, the utility model aims to provide a three-rod coded lock to solve the technical problems mentioned in the background art.
[0006] To achieve the above-mentioned purpose, the utility model provides a technical scheme: a three-rod coded lock, which comprises a front handle and a rear handle, a connecting square tube is connected between the front handle and the rear handle, a lock ruler is connected in the connecting square tube, the front handle comprises a front handle mounting tube, one end of the front handle mounting tube is connected with a coded knob, one end of the coded knob is connected with a connecting rotating rod, the connecting rotating rod is connected in the front handle mounting tube, the other end of the front handle mounting tube is connected with a connecting fitting, the connecting fitting is connected between the lock ruler, a connecting recess is concavely arranged in the middle part of the connecting fitting, a rotating rod joint is arranged at the end of the connecting rotating rod, the rotating rod joint is connected in the connecting recess, a first connecting tooth part is arranged on the inner side wall of the connecting recess, a second connecting tooth part is arranged on the outer side wall of the rotating rod joint, when the coded knob is pressed, the second connecting tooth part and the first connecting tooth part are connected by teeth.
[0007] Further, the outer side of the connecting rotating rod is sleeved with a knob spring, one end of the knob spring is provided with a small spring washer, one end of the small spring washer is provided with a small spring, the outer side of the small spring is provided with a handle core inner spring, and the connecting rotating rod is provided with a fitting spring between the connecting rotating rod and the connecting fitting.
[0008] Further, one end of the front handle mounting pipe is connected with a front steel cover, one end of the connecting fitting is provided with a flower spring, one end of the flower spring is provided with a handle rubber washer, one end of the handle rubber washer is provided with an AB front piece, the middle part of the front steel cover is provided with a torsion spring, the middle part of the torsion spring is provided with a galvanized washer, the two sides of the galvanized washer are symmetrically provided with limiting cylinders, one end of the limiting fitting is connected with the connecting fitting, and one end of the ruler is connected with the connecting fitting through the limiting fitting.
[0009] Further, the rear handle comprises a rear handle mounting pipe, one end of the rear handle mounting pipe is connected with a rear steel cover, the inside of the rear steel cover is provided with a rear steel cover bottom cover, the inside of the front steel cover is provided with a front steel cover mounting frame, and a threaded tooth pipe is connected between the rear steel cover bottom cover and the front steel cover mounting frame, so that the front handle and the rear handle are relatively connected.
[0010] Further, the middle part of the rear handle mounting pipe is connected with a large knob, the large knob is connected between the large knob and the ruler, one end of the large knob is provided with a large knob rubber washer, the outer side of the large knob is connected with a connecting head, one end of the connecting head is provided with a plastic buckle, and the plastic buckle is provided with a knob spring between the connecting head.
[0011] The utility model mainly has the following beneficial effects: one end of the front handle mounting pipe is connected with a password knob, one end of the password knob is connected with a connecting rotating rod, the connecting rotating rod is connected in the front handle mounting pipe, the other end of the front handle mounting pipe is connected with a connecting fitting, the middle part of the connecting fitting is concave and is provided with a connecting groove, the tail end of the connecting rotating rod is provided with a rotating rod connector, the rotating rod connector is connected in the connecting groove, the inner side wall of the connecting groove is provided with a first connecting tooth part, the outer side wall of the rotating rod connector is provided with a second connecting tooth part, the second connecting tooth part corresponds with the first connecting tooth part, when the password knob is pressed, the second connecting tooth part is connected with the first connecting tooth part, the utility model discloses a three-bar password lock, adopts the toothed connection, ensures that the password knob is pressed correctly and can drive the ruler, improves the security, and the structure is compact, convenient to assemble, disassemble and maintain. BRIEF DESCRIPTION OF DRAWINGS
[0012] Fig. 1 It is the whole three-dimensional structure schematic diagram of the utility model.
[0013] Fig. 2 It is the whole exploded view schematic diagram of the utility model.
[0014] Fig. 3The utility model discloses a password knob, connecting rotary rod and connecting accessory exploded structure schematic view.
[0015] Reference signs: front handle 10, rear handle 20, connecting square tube 30, lock ruler 31, front handle mounting pipe 11, password knob 12, connecting rotary rod 13, connecting accessory 14, connecting groove 141, rotary rod joint 131, first connecting tooth part 142, second connecting tooth part 132, knob spring 121, small clasp washer 122, small clasp 123, handle core inner clasp 124, accessory spring 15, front steel cover 16, flower elastic piece 143, handle rubber washer 144, AB front piece 145, torsion spring 161, galvanized washer 162, limiting cylinder 163, limiting accessory 146, rear handle mounting pipe 21, rear steel cover 22, rear steel cover bottom cover 23, front steel cover mounting frame 17, screw thread tooth pipe 40, big knob 24, big knob rubber washer 241, connecting head 25, plastic buckle 26, knob piece spring 27. DETAILED DESCRIPTION
[0016] As Figs. 1 to 3 shown, a three-rod password lock includes a front handle 10 and a rear handle 20, the front handle 10 and the rear handle 20 are connected with a connecting square tube 30, the connecting square tube 30 is connected with a lock ruler 31, when the front handle 10 or the rear handle 20 is rotated in use, the lock ruler 31 drives the connecting square tube 30 to rotate, and unlocking is realized.
[0017] In the specific implementation, the front handle 10 includes a front handle mounting pipe 11, one end of the front handle mounting pipe 11 is connected with a password knob 12, one end of the password knob 12 is connected with a connecting rotating rod 13, the connecting rotating rod 13 is connected in the front handle mounting pipe 11, the other end of the front handle mounting pipe 11 is connected with a connecting fitting 14, the connecting fitting 14 is connected with the lock ruler 31, the middle part of the connecting fitting 14 is recessed with a connecting groove 141, the end of the connecting rotating rod 13 is provided with a rotating rod joint 131, the rotating rod joint 131 is connected in the connecting groove 141, the inner side wall of the connecting groove 141 is provided with a first connecting tooth part 142, the outer side wall of the rotating rod joint 131 is provided with a second connecting tooth part 132, the second connecting tooth part 132 corresponds to the first connecting tooth part 142, in use, when the password knob 12 is not pressed, the second connecting tooth part 132 is separated from the first connecting tooth part 142, at this time, the connecting rotating rod 13 cannot drive the connecting fitting 14 to rotate, so that the lock cannot be opened, when the password knob 12 is pressed, the rotating rod joint 131 is inserted in the connecting groove 141 to form a mechanical connection, at the same time, the second connecting tooth part 132 is in meshing connection with the first connecting tooth part 142 to realize torque transmission, when the front handle 10 is rotated, the connecting rotating rod 13 drives the connecting fitting 14 to rotate, further drives the lock ruler 31 to rotate, finally drives the connecting square pipe 30 to rotate, and the lock is opened, the lock body structure is compact, the operation is convenient, and the safety is high.
[0018] In the specific implementation, the outer side of the connecting rotating rod 13 is sleeved with a knob spring 121, one end of the knob spring 121 is provided with a small snap spring pad 122, one end of the small snap spring pad 122 is provided with a small snap spring 123, the outer side of the small snap spring 123 is provided with a handle core inner snap spring 124, the connecting rotating rod 13 and the connecting fitting 14 are provided with a fitting spring 15, in use, the knob spring 121 controls the password knob 12 to reset and prevents accidental touch, the cooperation of the small snap spring pad 122, the small snap spring 123 and the handle core inner snap spring 124 ensures that the knob spring 121 is stable, the fitting spring 15 ensures that the rotating rod joint 131 can reset after the password knob 12 is released, automatically disconnects the meshing, and restores the locking, and the design can ensure the safety and convenience of the password lock.
[0019] In the specific implementation, one end of the front handle mounting pipe 11 is connected with a front steel cover 16, one end of the connecting fitting 14 is provided with a flower-shaped elastic sheet 143, one end of the flower-shaped elastic sheet 143 is provided with a handle rubber gasket 144, one end of the handle rubber gasket 144 is provided with an AB front sheet 145, the middle part of the front steel cover 16 is provided with a torsion spring 161, the middle part of the torsion spring 161 is provided with a galvanized gasket 162, the two sides of the galvanized gasket 162 are symmetrically provided with limiting cylinders 163, one end of the connecting fitting 14 is connected with a limiting fitting 146, one end of the lock ruler 31 passes through the limiting fitting 146 and is connected with the connecting fitting 14, in use, the torsion spring 161, the galvanized gasket 162 and the limiting cylinders 163 cooperate to ensure the return of the front handle 10, avoid damage to the spring due to excessive rotation, the flower-shaped elastic sheet 143 and the handle rubber gasket 144 cooperate to provide buffering and sound attenuation, improve the operation feeling, the limiting fitting 146 and the lock ruler 31 are connected to ensure stable movement of the lock ruler and prevent jamming or misplacement.
[0020] In the specific implementation, the rear handle 20 includes a rear handle mounting pipe 21, one end of the rear handle mounting pipe 21 is connected with a rear steel cover 22, the inside of the rear steel cover 22 is provided with a rear steel cover bottom cover 23, the inside of the front steel cover 16 is provided with a front steel cover mounting frame 17, a threaded pipe 40 is connected between the rear steel cover bottom cover 23 and the front steel cover mounting frame 17, so that the front handle 10 and the rear handle 20 are relatively connected, the structure is simple and the assembly is convenient.
[0021] In the specific implementation, the middle part of the rear handle mounting pipe 21 is connected with a large knob 24, the large knob 24 is connected with the lock ruler 31, one end of the large knob 24 is provided with a large knob rubber gasket 241, the outer side of the large knob 24 is connected with a connecting head 25, one end of the connecting head 25 is provided with a plastic buckle 26, the plastic buckle 26 and the connecting head 25 are provided with a knob spring 27, in use, when the large knob 24 is rotated, the large knob 24 drives the connecting head 25 to rotate, and then transmits power to the lock ruler 31 to realize the locking or unlocking function, the knob spring 27 provides a reset force, when the user releases the large knob 24, the large knob 24 can return to the original position, avoiding misplacement of the lock ruler 31 due to excessive rotation, the plastic buckle 26 plays a limiting role to ensure that the rotation angle of the large knob 24 is within the designed range, preventing misoperation or damaging the internal structure.
[0022] In summary, one end of the front handle mounting pipe 11 is connected with a password knob 12, one end of the password knob 12 is connected with a connecting rotating rod 13, the connecting rotating rod 13 is connected in the front handle mounting pipe 11, the other end of the front handle mounting pipe 11 is connected with a connecting fitting 14, the middle part of the connecting fitting 14 is concave with a connecting groove 141, the end of the connecting rotating rod 13 is provided with a rotating rod joint 131, the rotating rod joint 131 is connected in the connecting groove 141, the inner side wall of the connecting groove 141 is provided with a first connecting tooth part 142, the outer side wall of the rotating rod joint 131 is provided with a second connecting tooth part 132, the second connecting tooth part 132 corresponds with the first connecting tooth part 142, when the password knob 12 is pressed, the second connecting tooth part 132 and the first connecting tooth part 142 are in engagement, the three-rod password lock of the utility model adopts engagement, ensures that the password knob can be correctly pressed to drive the lock ruler, improves safety, the structure is compact, and assembly, disassembly and maintenance are facilitated.
Claims
1. A three-bar combination lock, characterized in that, It includes the front handle (10) and the rear handle (20), the front handle (10) is connected with the rear handle (20), the connecting square tube (30) is connected with the lock ruler (31), the front handle (10) includes the front handle mounting tube (11), one end of the front handle mounting tube (11) is connected with the password knob (12), one end of the password knob (12) is connected with the connecting rotating rod (13), the connecting rotating rod (13) is connected in the front handle mounting tube (11), the other end of the front handle mounting tube (11) is connected with the connecting accessory (14), the connecting accessory (14) is connected between the lock ruler (31), the middle part of the connecting accessory (14) is recessed with the connecting recess (141), the end of the connecting rotating rod (13) is provided with the rotating rod joint (131), the rotating rod joint (131) is connected in the connecting recess (141), the inner side wall of the connecting recess (141) is provided with the first connecting tooth part (142), the outer side wall of the rotating rod joint (131) is provided with the second connecting tooth part (132), when the password knob (12) is pressed, the second connecting tooth part (132) is connected with the first connecting tooth part (142) between the teeth.
2. The three-bar combination lock of claim 1, wherein, The outer side of the connecting rotating rod (13) is sleeved with the knob spring (121), one end of the knob spring (121) is provided with the small spring washer (122), one end of the small spring washer (122) is provided with the small spring (123), the outer side of the small spring (123) is provided with the handle core inner spring (124), the connecting accessory (14) is provided with the accessory spring (15) between the connecting rotating rod (13).
3. The three-bar combination lock of claim 2, wherein, One end of the front handle mounting tube (11) is connected with the front steel cover (16), one end of the connecting accessory (14) is provided with the flower spring piece (143), one end of the flower spring piece (143) is provided with the handle rubber pad (144), one end of the handle rubber pad (144) is provided with the AB front piece (145), the middle part of the front steel cover (16) is provided with the torsion spring (161), the middle part of the torsion spring (161) is provided with the galvanized pad (162), the both sides of the galvanized pad (162) are symmetrically provided with the limiting cylinder (163), one end of the connecting accessory (14) is connected with the limiting accessory (146), one end of the lock ruler (31) passes through the limiting accessory (146) and is connected with the connecting accessory (14).
4. The three-bar combination lock of claim 3, wherein, The rear handle (20) includes the rear handle mounting tube (21), one end of the rear handle mounting tube (21) is connected with the rear steel cover (22), the inside of the rear steel cover (22) is provided with the rear steel cover bottom cover (23), the inside of the front steel cover (16) is provided with the front steel cover mounting frame (17), the rear steel cover bottom cover (23) and the front steel cover mounting frame (17) are connected with the threaded tooth tube (40), so that the front handle (10) and the rear handle (20) are connected relative to each other.
5. The three-bar combination lock of claim 4, wherein, The middle part of the rear handle mounting pipe (21) is connected with a large knob (24), the large knob (24) is connected with the lock ruler (31), one end of the large knob (24) is provided with a large knob rubber gasket (241), the outer side of the large knob (24) is connected with a connecting head (25), one end of the connecting head (25) is provided with a plastic buckle (26), the plastic buckle (26) and the connecting head (25) are provided with a knob spring (27) therebetween.