Mechanical coded lock

Abstract

The mechanical coded lock comprises a lock frame, a handle assembly, a pushing assembly and a plurality of knob assemblies, the lock frame is provided with an inner cavity, a first penetrating hole, a second penetrating hole and a plurality of limiting holes, the inner cavity comprises a first cavity, a connecting hole and a second cavity which are sequentially communicated, the first penetrating hole and the second penetrating hole are both communicated with the first cavity, and the limiting holes are communicated with the second cavity; the handle assembly penetrates through the first penetrating hole, the first cavity and the second penetrating hole and is provided with a containing cavity and an avoiding groove communicated with the containing cavity, the pushing assembly comprises a pin, a limiting plate, a first spring and a second spring, one end of the pin is located in the avoiding groove, and the other end of the pin is installed in the containing cavity through the first spring. One end of the limiting plate is located in the connecting hole and abuts against the pin nail, the other end of the limiting plate abuts against the second spring to the inner wall of the second cavity, the limiting plate is provided with a plurality of first through holes, and positioning blocks are arranged on the inner walls of the first through holes. The knob assembly penetrates through the limiting hole and then is located in the first through hole. The knob assembly is provided with a first positioning groove connected with the positioning block in a clamped mode.

Description

Technical Field

[0001] This invention relates to the field of combination lock structure technology, and more particularly to a mechanical combination lock. Background Technology

[0002] In daily life, people use keys to open doors, so they need to carry keys with them at all times.

[0003] However, in reality, people sometimes forget or lose their keys for various reasons, resulting in them being unable to open the door when they get home. They have to call a locksmith to unlock the door, which wastes both time and money. Summary of the Invention

[0004] This invention provides a mechanical combination lock, which aims to solve the technical problem in the prior art where people forget or lose their keys for various reasons, resulting in them being unable to open the door when they return home and having to call a locksmith to unlock it, which is both time-consuming and costly.

[0005] The technical solution of the present invention is as follows: To achieve the above objectives, the present invention provides a mechanical combination lock, comprising: A lock frame is provided with an inner cavity, a first through hole, a second through hole, and a plurality of limiting holes. The inner cavity includes a first chamber, a second chamber, and a connecting hole. The first chamber is connected to the second chamber through the connecting hole. The front and rear ends of the first chamber are connected to the first through hole and the second through hole, respectively. Each of the limiting holes is connected to the front end of the second chamber. A handle assembly that passes sequentially through the first through hole, the first chamber, and the second through hole from the front side of the lock frame and protrudes from the rear side of the lock frame. The handle assembly is provided with a cavity and a relief groove, and the relief groove can communicate with the connecting hole through the cavity. A pushing component is located in the inner cavity. The pushing component includes a pin, a limiting plate, a first spring, and a second spring. One end of the pin is located in the clearance groove, and the other end is slidably installed in the cavity through the first spring. One end of the limiting plate is located in the connecting hole and abuts against the pin, and the other end presses against the second spring against the inner wall of the second chamber. The elastic force of the second spring is greater than that of the first spring. The limiting plate is provided with a plurality of first through holes, and a positioning block protrudes from the inner wall of the first through holes. Multiple knob assemblies are provided. The knob assembly passes through the limiting hole from the outside of the lock frame and is located in the first through hole. The outer wall of the knob assembly is provided with a first positioning groove. The positioning block is engaged in the first positioning groove. When locking is required, at least one of the knob assemblies is rotated. The positioning block separates from the corresponding first positioning groove. The limiting plate moves toward the second spring and compresses the second spring. The pin separates from the clearance groove under the action of the first spring and moves into the connecting hole.

[0006] Furthermore, the pin includes a pin rod that abuts against the limiting plate and a retaining ring protruding from the middle of the pin rod. The retaining ring and the first spring are both located in the cavity. The first spring is located on the side of the retaining ring away from the limiting plate. One end of the pin rod is located in the cavity, and the other end passes through the first spring and is located in the clearance groove.

[0007] Furthermore, the handle assembly includes a handle, a rotating head, an output seat, a pin, and a square shaft for connection with the lock. The output seat protrudes from the rear end of the lock frame after passing through the first through hole, the first chamber, and the second through hole sequentially from the front end of the lock frame. The output seat has a receiving groove and a cavity communicating with the receiving groove. The rotating head is inserted into the receiving groove. The outer wall of the rotating head has an annular groove and a first notch groove. One end of the pin is fixed to the inner wall of the receiving groove, and the other end is inserted into the annular groove. The inner wall of the first notch groove and part of the inner wall of the receiving groove form the clearance groove. The handle is fixed to the rotating head, and the square shaft is fixed to the output seat.

[0008] Furthermore, the limiting plate includes a first plate body, a plurality of positioning blocks, and two push rods respectively protruding from both sides of the first plate body, wherein one push rod is located in the connecting hole and abuts against the pin, and the other push rod is inserted into the second spring. Each of the first through holes is provided on the first plate body, and the positioning block protrudes from the inner wall of the first through hole near the second spring.

[0009] Furthermore, the lock frame includes a bottom frame and a top cover. The bottom frame includes a bottom shell and an annular side plate disposed on the inner wall of the bottom shell. The annular side plate has an opening. The top cover is installed on the bottom shell and covers the annular side plate. The inner wall of the annular side plate, part of the bottom shell, and part of the top cover enclose to form a first chamber. The outer wall of the annular side plate, part of the bottom shell, and part of the top cover enclose to form a second chamber. The inner wall of the opening, part of the bottom shell, and part of the top cover enclose to form the connecting hole. The first through hole and the limiting hole are both disposed on the top cover, and the second through hole is disposed on the bottom shell.

[0010] Furthermore, the mechanical combination lock also includes multiple fasteners, the bottom frame also includes multiple first positioning posts all disposed on the bottom shell, and the bottom frame is also provided with a third through hole, the third through hole passing through the bottom shell and the first positioning posts in sequence; The upper cover includes an upper shell and a plurality of second positioning posts disposed on the upper shell. The upper shell is connected to the bottom shell and surrounds the inner cavity. The first positioning post and the second positioning post are both located in the second cavity. The second positioning post is provided with a first threaded hole. The limiting plate is also provided with a plurality of first positioning holes. The first positioning post is sleeved in the first positioning hole. The outer diameter of the first positioning post is smaller than the inner diameter of the first positioning hole. The fastener passes through the third through hole and is connected to the first threaded hole.

[0011] Furthermore, the knob assembly includes a knob body, a release wheel, a dial plate, a dial base, and a third spring. The release wheel, the dial plate, the dial base, and the third spring are all located in the second cavity. The dial base includes a base fixed to the inner cavity and a plurality of protrusions all provided on the base. The base is provided with a second through hole, and each of the protrusions is arranged around the second through hole. The dial has a third through hole, a first positioning groove and a plurality of fourth through holes, each of the fourth through holes being arranged around the third through hole, and the first positioning groove being arranged on the outer side wall of the dial. The separating wheel has a polygonal fourth through hole and multiple grooves all surrounding the fourth through hole, and the number of protrusions is less than the number of grooves; The knob body includes a knob plate, a grip, and a rotating rod. The rotating rod and the grip are respectively located on the front and rear sides of the knob plate. The outer wall of the rotating rod is a polygonal structure adapted to the fourth through hole. The protruding post passes through the corresponding fourth through hole and is inserted into the corresponding groove. One end of the third spring abuts against the inner wall of the inner cavity, and the other end passes through the second through hole and the third through hole in sequence and abuts against the release wheel. The knob plate and the grip are both located outside the lock frame. The rotating rod passes through the fourth through hole and extends into the third spring. The knob plate has multiple marks, and each mark is arranged around the grip.

[0012] Furthermore, the knob assembly also includes a fourth spring and a first ball bearing. The rotating rod includes a first rod body connected to the knob and a second rod body connected to the first rod body. The outer side wall of the first rod body is provided with a slot. The inner wall of the limiting hole is provided with a plurality of second positioning slots respectively corresponding to each of the marks. The first ball bearing is installed in the slot through the fourth spring, and the first ball bearing part protrudes out of the slot and is engaged with one of the second positioning slots. The outer side wall of the second rod body has a polygonal structure. The second rod body passes through the fourth through hole and extends into the third spring.

[0013] Furthermore, the mechanical combination lock also includes a setting plate and an adjusting component. The setting plate and the adjusting component are both located in the second cavity. The setting plate includes a second plate body and a plurality of hooks respectively provided on both sides of the second plate body. The second plate body is located on the side of the separating wheel away from the limiting plate. The second plate body is provided with a second threaded hole, a plurality of second positioning holes and a plurality of fifth through holes. The second positioning pin passes through the second positioning hole. The upper cover is also provided with a clearance hole communicating with the second chamber. The bottom frame also includes a third positioning post provided on the bottom shell. The limiting plate is also provided with a third positioning hole and a plurality of second notches. The third positioning post is located in the inner cavity and passes through the third positioning hole. The inner diameter of the third positioning hole is larger than the outer diameter of the third positioning post. The adjusting member is threadedly installed on the second threaded hole and abuts against the third positioning post. The adjusting member is correspondingly provided with the clearance hole. The hook passes through the second notch and engages with the limiting plate. The rotating rod passes through the fifth through hole, the fourth through hole and the third spring in sequence.

[0014] Furthermore, the knob assembly also includes a plurality of second balls, and the separating wheel has a plurality of embedding grooves on the side away from the limiting plate. The second balls are installed in the embedding grooves, and the second balls partially protrude from the separating wheel and abut against the setting plate.

[0015] Compared with the prior art, the beneficial effects of the present invention include at least the following: The mechanical combination lock of this invention has a simple and novel structure, is easy to operate, has a large number of digits in the combination, and has high security performance. Users can unlock the door at any time without carrying a key in their daily lives, which can provide convenience for users, solve the pain point of forgetting keys, make travel more convenient, use more convenient, and avoid wasting money. Moreover, this mechanical combination lock is a pure mechanical structure, with good working stability and low manufacturing cost. Attached Figure Description

[0016] Figure 1 This is a partial structural diagram of a mechanical combination lock provided in an embodiment of the present invention; Figure 2 for Figure 1 explosion Figure 1 ; Figure 3 for Figure 1 explosion Figure 2 ; Figure 4 This is a schematic diagram of the structure of the upper cover provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the bottom frame provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the limiting plate provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the output seat and square shaft combined according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the rotating head provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the setting plate provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the combination of the dial switch and the dial switch socket provided in an embodiment of the present invention; Figure 11 for Figure 10 Exploded view; Figure 12 A schematic diagram of the separation wheel provided in an embodiment of the present invention. Figure 1 ; Figure 13 A schematic diagram of the separation wheel provided in an embodiment of the present invention. Figure 2 ; Figure 14 This is a schematic diagram of the structure of the knob body provided in an embodiment of the present invention; Figure 15 Partial cross-section of a mechanical combination lock provided in an embodiment of the present invention. Figure 1 ; Figure 16 Partial cross-section of a mechanical combination lock provided in an embodiment of the present invention. Figure 2 ; Figure 17 Partial cross-section of a mechanical combination lock provided in an embodiment of the present invention. Figure 3 ; Figure 18 Partial cross-section of a mechanical combination lock provided in an embodiment of the present invention. Figure 4 .

[0017] In the picture: 10. Lock frame; 11. Inner cavity; 111. First chamber; 112. Second chamber; 12. First through hole; 13. Second through hole; 14. Limiting hole; 141. Second positioning groove; 15. Bottom frame; 151. Bottom shell; 1511. Mounting groove; 152. Annular side plate; 1521. Opening; 153. First positioning post; 154. Third through hole; 155. Support post; 1551. Recess; 156. Third positioning post; 16. Top cover; 161. Top shell; 162. Second positioning post ; 1621, First threaded hole; 163, Clearance hole; 17, Locking element; 20, Handle assembly; 21, Cavity; 22, Clearance groove; 23, Handle; 24, Rotating head; 241, Annular groove; 242, First notch groove; 25, Output seat; 251, Receiving groove; 252, Pin hole; 26, Pin shaft; 27, Square shaft; 30, Pushing assembly; 31, Pin pin; 311, Pin rod; 312, Retaining ring; 32, Limiting plate; 321, First through hole; 322, Positioning block; 323, First... 324. Plate body; 325. Top rod; 326. First positioning hole; 327. Third positioning hole; 328. Second notch; 33. First spring; 34. Second spring; 40. Knob assembly; 41. Knob body; 411. Knob plate; 4111. Mark; 412. Grip; 413. Rotating rod; 4131. First rod body; 4132. Second rod body; 4133. Slot; 4134. Insertion slot; 42. Separating wheel; 421. Fourth through hole; 422. Groove; 423. Embedding 43. Slot; 431. Dial switch; 432. Third through hole; 433. First positioning slot; 433. Fourth through hole; 44. Dial switch base; 441. Base; 4411. Second through hole; 442. Protrusion; 45. Third spring; 46. Fourth spring; 47. First ball bearing; 48. Snap ring; 49. Second ball bearing; 50. Fastener; 60. Setting plate; 61. Second plate; 611. Second threaded hole; 612. Second positioning hole; 613. Fifth through hole; 62. Hook; 70. Adjusting component. Detailed Implementation

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0019] Please see Figures 1 to 8 ,as well as Figures 15 to 17As shown, this embodiment of the invention discloses a mechanical combination lock, including a lock frame 10, a handle assembly 20, a push assembly 30, and multiple knob assemblies 40. The lock frame 10 has an inner cavity 11, a first through hole 12, a second through hole 13, and multiple limiting holes 14. The inner cavity 11 includes a first chamber 111, a second chamber 112, and a connecting hole. The first chamber 111, the second chamber 112, and the connecting hole are all located inside the lock frame 10. The first chamber 111 communicates with the second chamber 112 through the connecting hole. The first through hole 12 and each limiting hole 14 are opened on the front side of the lock frame 10, and the second through hole 13 is opened on the rear side of the lock frame 10. The front and rear ends of the first chamber 111 are respectively connected to the first through hole 12 and the second through hole 13. Each limiting hole 14 is connected to the front end of the second chamber 112.

[0020] The handle assembly 20 passes through the first through hole 12, the first chamber 111 and the second through hole 13 in sequence from the front side of the lock frame 10 and then protrudes from the rear side of the lock frame 10. The handle assembly 20 can rotate relative to the lock frame 10. The handle assembly 20 is provided with a cavity 21 and a relief groove 22. When the handle assembly 20 is rotated to the desired position, the relief groove 22 can communicate with the connecting hole through the cavity 21.

[0021] The pushing component 30 is located in the inner cavity 11. The pushing component 30 includes a pin 31, a limiting plate 32, a first spring 33, and a second spring 34. One end of the pin 31 is located in the relief groove 22, and the other end is slidably installed in the cavity 21 through the first spring 33. One end of the limiting plate 32 is located in the connecting hole and abuts against the pin 31, and the other end presses against the second spring 34 on the inner wall of the second chamber 112. At this time, the first spring 33 is in a compressed state, and the elastic force of the second spring 34 is greater than the elastic force of the first spring 33. The limiting plate 32 is provided with a plurality of first through holes 321. The inner wall of the first through hole 321 is provided with a positioning block 322, which is a V-shaped block.

[0022] The knob assembly 40 passes through the limiting hole 14 on the outside of the self-locking frame 10 and is located in the first through hole 321. The outer wall of the knob assembly 40 is provided with a first positioning groove 432, which is a V-shaped groove. The positioning block 322 is engaged in the first positioning groove 432. The inner diameter of the first through hole 321 is larger than the corresponding outer diameter of the knob assembly 40 so that when the knob assembly 40 is rotated, the positioning block 322 can be misaligned with the first positioning groove 432. There are six knob assemblies 40. When locking, rotating at least one knob assembly 40 causes the positioning block 322 to separate from the corresponding first positioning groove 432. The limiting plate 32 is pressed by the outer side of the knob assembly 40, causing the limiting plate 32 to move towards the second spring 34 and compress the second spring 34. Under the action of the first spring 33, the pin 31 separates from the clearance groove 22 and moves into the connecting hole. The pin 31 is pushed towards the limiting plate 32, thus preventing the knob assembly 40 from rotating, completing the locking function. When unlocking is required, such as... Figure 15 and Figure 16 Rotate each knob assembly 40 to the desired position, and each positioning block 322 will be engaged in the first positioning groove 432. All positioning blocks 322 in the limiting plate 32 must be engaged with all knob assemblies 40. At this time, under the push of the second spring 34, the limiting plate 32 moves toward the first spring 33 and compresses the first spring 33. The pin 31 separates from the connecting hole under the action of the second spring 34 and moves into the clearance groove 22. Rotating the knob assembly 40 can complete the unlocking function. There is no need to carry a key, and the lock can be opened at any time.

[0023] The pin 31 includes a pin rod 311 that abuts against the limiting plate 32 and a retaining ring 312 protruding from the middle of the pin rod 311. The retaining ring 312 and the first spring 33 are both located in the cavity 21. The first spring 33 is located on the side of the retaining ring 312 away from the limiting plate 32. The second spring 34 acts on the pin rod 311 through the limiting plate 32, so that one end of the pin rod 311 is located in the cavity 21 and the other end passes through the first spring 33 and is located in the relief groove 22. The first spring 33 is in a compressed state.

[0024] In this embodiment, the handle assembly 20 includes a handle 23, a rotating head 24, an output seat 25, a pin 26, and a square shaft 27 for connection with the lock. The output seat 25 protrudes from the rear end of the lock frame 10 after passing through the first through hole 12, the first chamber 111, and the second through hole 13 sequentially from the front end of the lock frame 10. The output seat 25 is provided with a receiving groove 251 and a cavity 21 communicating with the receiving groove 251. The receiving groove 251 is located on the side of the output seat 25 facing the handle 23, and the cavity 21 is located on the side of the outer wall of the output seat 25 near its bottom end. The rotating head 24 is inserted into the receiving groove 251. The outer wall of the rotating head 24 is provided with an annular groove 241 and a first notch 242. The annular groove 241 is located on the side of the rotating head 24. In the middle position, the first notch 242 is set near the bottom of the rotating head 24. The inner wall of the receiving groove 251 is provided with a pin hole 252. One end of the pin 26 is fixed to the pin hole 252 on the inner wall of the receiving groove 251, and the other end of the pin 26 is inserted into the annular groove 241. The inner wall of the first notch 242 and part of the inner wall of the receiving groove 251 form the clearance groove 22. The handle 23 is fixed to the rotating head 24 and cannot be disassembled relative to the rotating head 24. The square shaft 27 is fixed to the output seat 25. When the pin 31 is disengaged from the clearance groove 22, that is, when it is in the locked state, the handle assembly 20 is rotated by the handle 23, and the rotating head 24 will rotate relative to the output seat 25, and the output seat 25 will be in a fixed state.

[0025] The limiting plate 32 includes a first plate body 323, a plurality of positioning blocks 322, and two push rods 324 respectively protruding from both sides of the first plate body 323. One push rod 324 is located in the connecting hole and abuts against the pin 31, and the other push rod 324 is partially inserted into the second spring 34. The first plate body 323 is located in the second chamber 112. Each first through hole 321 is provided on the first plate body 323. The positioning block 322 protrudes from the inner wall of the first through hole 321 near the second spring 34.

[0026] The lock frame 10 includes a bottom frame 15 and a top cover 16. The bottom frame 15 and the top cover 16 are connected by multiple locking elements 17. The bottom frame 15 includes a bottom shell 151 and an annular side plate 152 disposed on the inner wall of the bottom shell 151. The annular side plate 152 has an opening 1521. The top cover 16 is installed on the bottom shell 151 and covers the annular side plate 152. The top cover 16 and the bottom shell 151 enclose the inner cavity 11. The annular side plate 152 is located in the inner cavity 11. The inner wall of the annular side plate 152... A portion of the bottom shell 151 and a portion of the top cover 16 enclose the first chamber 111. The outer wall of the annular side plate 152, another portion of the bottom shell 151, and another portion of the top cover 16 enclose the second chamber 112. The inner wall of the opening 1521, the remaining portion of the bottom shell 151, and the remaining portion of the top cover 16 enclose the connecting hole. The first through hole 12 and the limiting hole 14 are both provided on the top cover 16. The second through hole 13 is provided on the bottom shell 151. The locking element 17 is a screw.

[0027] The mechanical combination lock also includes multiple fasteners 50, and the bottom frame 15 also includes multiple first positioning posts 153, which are all located on the bottom shell 151. The first positioning posts 153 are located in the inner cavity 11. The bottom frame 15 also has a third through hole 154, which passes through the bottom shell 151 and the first positioning posts 153 in sequence. There are two first positioning posts 153 and two fasteners 50. The two first positioning posts 153 are located in the middle of the bottom frame 15.

[0028] The upper cover 16 includes an upper shell 161 and a plurality of second positioning posts 162, each located on the upper shell 161. The upper shell 161 is connected to the bottom shell 151 and encloses the inner cavity 11. The first positioning post 153 and the second positioning post 162 are both located in the second cavity 112. The second positioning post 162 is provided with a first threaded hole 1621. The limiting plate 32 is also provided with a plurality of first positioning holes 325. The first positioning post 153 is fitted into the first positioning hole 325. The outer diameter of the first positioning post 153 is smaller than the inner diameter of the first positioning hole 325, and the outer diameter of the second positioning post 162 is larger than the inner diameter of the first positioning hole 325. The first positioning post 153 can guide the sliding of the limiting plate 32. The fastener 50 passes through the third through hole 154 and is connected to the first threaded hole 1621 to enhance the stability of the first positioning post 153 and the second positioning post 162. The fastener 50 is a screw.

[0029] Please refer to further information. Figures 1 to 6 ,as well as Figures 9 to 18 In this embodiment, the knob assembly 40 includes a knob body 41, a release wheel 42, a dial 43, a dial base 44, and a third spring 45. The release wheel 42, the dial 43, the dial base 44, and the third spring 45 are all located in the second chamber 112. The dial base 44 includes a base 441 fixed to the inner cavity 11 and a plurality of protrusions 442 all provided on the base 441. The protrusions 442 are located on the side of the base 441 facing the knob body 41. A second through hole 4411 is provided in the middle of the base 441, and each protrusion 442 is arranged around the second through hole 4411.

[0030] The dial 43 is provided with a third through hole 431, the first positioning groove 432 and a plurality of fourth through holes 433. Each fourth through hole 433 is arranged around the third through hole 431. The first positioning groove 432 is provided on the outer side wall of the dial 43. The dial 43 is located inside the first through hole 321. Each third through hole 154 is connected to the third through hole 431. The separation wheel 42 is provided with a polygonal fourth through hole 421 and a plurality of grooves 422 arranged around the fourth through hole 421. The fourth through hole 421 is an octagonal hole. The grooves 422 are located on the side of the separation wheel 42 facing the dial 43. The number of protrusions 442 is less than the number of grooves 422. The number of protrusions 442 is the same as the number of fourth through holes 433.

[0031] The knob body 41 includes a knob plate 411, a grip portion 412, and a rotating rod 413. The rotating rod 413 and the grip portion 412 are respectively located on the front and rear sides of the knob plate 411. The outer wall of the lower end of the rotating rod 413 is a polygonal structure adapted to the fourth through hole 421. The outer wall of the lower end of the rotating rod 413 is an octagonal structure. The protrusion 442 passes through the corresponding fourth through hole 433 and is inserted into the corresponding groove 422. One end of the third spring 45 abuts against the inner wall of the inner cavity 11, and the other end passes through... After passing through the second through hole 4411 and the third through hole 431, it abuts against the separation wheel 42. The third spring 45 is in a compressed state. The knob 411 and the grip 412 are both located outside the lock frame 10. The rotating rod 413 passes through the fourth through hole 421 and extends into the third spring 45. The rotating rod 413 is spaced apart from the inner wall of the bottom shell 151. The knob 411 is provided with multiple marks 4111. Each mark 4111 is arranged around the grip 412. Each mark 4111 can be a number from 0 to 9.

[0032] In some embodiments, the bottom frame 15 further includes a plurality of support columns 155, the support columns 155 being located inside the inner cavity 11, the bottom wall of the bottom shell 151 being provided with a plurality of mounting grooves 1511, the support columns 155 protruding from the bottom wall of the mounting grooves 1511, the dial switch base 44 being installed in the mounting grooves 1511, the support columns 155 passing through the second through hole 4411 and the third through hole 431, the side of the support column 155 away from the bottom wall of the bottom shell 151 being provided with a recess 1551, the third spring 45 being partially sleeved on the outside of the support column 155, and the rotating rod 413 abutting against the inner wall of the recess 1551 to enhance the rotation strength of the knob body 41.

[0033] The knob assembly 40 also includes a fourth spring 46 and a first ball bearing 47. The rotating rod 413 includes a first rod body 4131 and a second rod body 4132 coaxially connected to the first rod body 4131. The first rod body 4131 is cylindrical and connected to the knob 411. The outer wall of the first rod body 4131 is provided with a groove 4133. The inner wall of the limiting hole 14 is provided with a plurality of second positioning grooves 141 respectively corresponding to each mark 4111. The fourth spring 46 is located inside the groove 4133. The first ball bearing... 47 is installed in the slot 4133 by the fourth spring 46, and the first ball 47 protrudes out of the slot 4133 and is engaged with one of the second positioning slots 141. When the knob body 41 is rotated, the first ball 47 on the knob body 41 can move from one of the second positioning slots 141 to the other required second positioning slot 141 in sequence to achieve precise rotation. The outer wall of the second rod 4132 is a polygonal structure. The second rod 4132 passes through the fourth through hole 421 and extends into the interior of the third spring 45.

[0034] The knob assembly 40 also includes a retaining spring 48. The outer wall of the rotating rod 413 is provided with an annular mounting groove 4134. The retaining spring 48 is located in the inner cavity 11 and is installed on the annular mounting groove 4134. The retaining spring 48 abuts against the upper cover 16 to prevent the knob body 41 from disengaging from the lock frame 10.

[0035] In this embodiment, the mechanical combination lock also includes a setting plate 60 and an adjusting member 70. Both the setting plate 60 and the adjusting member 70 are located in the second chamber 112. The setting plate 60 includes a second plate body 61 and a plurality of hooks 62 respectively provided at both ends of the second plate body 61. The second plate body 61 is located on the side of the separating wheel 42 away from the limiting plate 32. The second plate body 61 is provided with a second threaded hole 611, a plurality of second positioning holes 612 and a plurality of fifth through holes 613. There are two second positioning holes 612. Both second positioning holes 612 are located in the middle of the setting plate 60. The second threaded hole 611 is located between the two second positioning holes 612. The second positioning pin 162 passes through the second positioning hole 612.

[0036] The top cover 16 is also provided with a clearance hole 163 communicating with the second chamber 112. The bottom frame 15 also includes a third positioning post 156 provided on the bottom shell 151. The limiting plate 32 is also provided with a third positioning hole 326 and multiple second notches 327. The third positioning hole 326 is located between two first positioning holes 325. The third positioning post 156 is located in the inner cavity 11 and passes through the third positioning hole 326. The inner diameter of the third positioning hole 326 is larger than the outer diameter of the third positioning post 156. The adjusting component 70 is threaded onto the second threaded hole 611 and abuts against the third positioning post 156. The adjusting component 70 is correspondingly set with the clearance hole 163. The adjusting component 70 does not contact the limiting plate 32. The hook 62 passes through the second notch 327 and engages with the limiting plate 32. The rotating rod 413 passes through the fifth through hole 613, the fourth through hole 421 and the third spring 45 in sequence. The adjusting component 70 is an internal hex bolt. When it is necessary to change the password, such as Figure 17 and Figure 18 The mechanical combination lock needs to be in the unlocked state. An external screwdriver passes through the clearance hole 163 and acts on the adjusting member 70, turning the adjusting member 70 clockwise. This causes the setting plate 60 to rotate. The engagement of the second positioning hole 612 and the second positioning pin 162 restricts the rotation of the setting plate 60, causing it to move towards the upper cover 16. The hook 62 disengages from the second notch 327, and the setting plate 60 is positioned against the upper cover 16. The third spring 45 lifts the release wheel 42, allowing the dial switch base 44 to... The protrusion 442 separates from the groove 422 in the separating wheel 42. Rotate the required knob body 41. The knob body 41 only drives the separating wheel 42 to rotate, but cannot drive the dial 43 and dial base 44 to rotate. After rotating the knob body 41 to the required position according to the mark 4111 on it, the new password setting is completed. Then turn the adjusting part 70 counterclockwise back to make the setting plate 60 away from the side of the upper cover 16. The protrusion 442 in the dial base 44 can be inserted into the groove 422 in the separating wheel 42.

[0037] When the mechanical combination lock is in the closed state, rotating the adjusting member 70 causes the limiting plate 32 to be pushed towards the second spring 34 by the outer circle of the dial plate 43. The second notches 327 on both sides of the limiting plate 32 are misaligned with the hooks 62 on the setting plate 60. When the adjusting member 70 is about to move the setting plate 60 towards the upper cover 16, the hooks 62 on the setting plate 60 first contact the limiting plate 32, causing the limiting plate 32 to also move towards the upper cover 16. However, because the upper cover 16 restricts the movement of the limiting plate 32 towards the upper cover 16, the setting plate 60 cannot move towards the upper cover 16. Therefore, the separating wheel 42 cannot separate from the protrusion 442 in the dial plate base 44. At this time, rotating the knob body 41 can drive the dial plate base 44 and the dial plate 43 to rotate, but the numbers on the knob body 41 cannot be changed. Therefore, the combination lock cannot be changed when it is in the closed state.

[0038] The knob assembly 40 also includes a plurality of second balls 49. The side of the separating wheel 42 away from the limiting plate 32 is provided with a plurality of embedding grooves 423. The second balls 49 are installed in the embedding grooves 423, and the second balls 49 are partially protruding from the separating wheel 42 and abutting against the setting plate 60 to reduce the friction between the separating wheel 42 and the inner wall of the setting plate 60.

[0039] In summary, the mechanical combination lock of this invention has a simple and novel structure, is easy to operate, has a large number of digits in the combination, and has high security performance. Users can unlock the door at any time without carrying a key in their daily lives, which can provide convenience for users, solve the pain point of forgetting keys, make travel more convenient, and make use more convenient without wasting money. Moreover, this mechanical combination lock is a pure mechanical structure with good working stability and low manufacturing cost.

[0040] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A mechanical combination lock, characterized in that, include: A lock frame is provided with an inner cavity, a first through hole, a second through hole, and a plurality of limiting holes. The inner cavity includes a first chamber, a second chamber, and a connecting hole. The first chamber is connected to the second chamber through the connecting hole. The front and rear ends of the first chamber are connected to the first through hole and the second through hole, respectively. Each of the limiting holes is connected to the front end of the second chamber. A handle assembly that passes sequentially through the first through hole, the first chamber, and the second through hole from the front side of the lock frame and protrudes from the rear side of the lock frame. The handle assembly is provided with a cavity and a relief groove, and the relief groove can communicate with the connecting hole through the cavity. A pushing component is located in the inner cavity. The pushing component includes a pin, a limiting plate, a first spring, and a second spring. One end of the pin is located in the clearance groove, and the other end is slidably installed in the cavity through the first spring. One end of the limiting plate is located in the connecting hole and abuts against the pin, and the other end presses against the second spring against the inner wall of the second chamber. The elastic force of the second spring is greater than that of the first spring. The limiting plate is provided with a plurality of first through holes, and a positioning block protrudes from the inner wall of the first through holes. Multiple knob assemblies are provided. The knob assembly passes through the limiting hole from the outside of the lock frame and is located in the first through hole. The outer wall of the knob assembly is provided with a first positioning groove. The positioning block is engaged in the first positioning groove. When locking is required, at least one of the knob assemblies is rotated. The positioning block separates from the corresponding first positioning groove. The limiting plate moves toward the second spring and compresses the second spring. The pin separates from the clearance groove under the action of the first spring and moves into the connecting hole.

2. The mechanical combination lock of claim 1, wherein, The pin includes a pin rod that abuts against the limiting plate and a retaining ring protruding from the middle of the pin rod. The retaining ring and the first spring are both located in the cavity. The first spring is located on the side of the retaining ring away from the limiting plate. One end of the pin rod is located in the cavity, and the other end passes through the first spring and is located in the clearance groove.

3. The mechanical combination lock of claim 1, wherein, The handle assembly includes a handle, a rotating head, an output seat, a pin, and a square shaft for connection with the lock. The output seat protrudes from the rear end of the lock frame after passing through the first through hole, the first chamber, and the second through hole sequentially from the front end of the lock frame. The output seat has a receiving groove and a cavity communicating with the receiving groove. The rotating head is inserted into the receiving groove. The outer wall of the rotating head has an annular groove and a first notch groove. One end of the pin is fixed to the inner wall of the receiving groove, and the other end is inserted into the annular groove. The inner wall of the first notch groove and part of the inner wall of the receiving groove form the clearance groove. The handle is fixed to the rotating head, and the square shaft is fixed to the output seat.

4. The mechanical password lock of claim 1, wherein, The limiting plate comprises a first plate body, a plurality of positioning blocks, and two top rods respectively protruding from two side ends of the first plate body, one of the top rods is located in the connecting hole and abuts against the spike, the other top rod is inserted into the second spring, each first through hole is arranged on the first plate body, and the positioning blocks protrude from the inner wall of the first plate body on the side close to the second spring.

5. The mechanical password lock of claim 1, wherein, The lock frame comprises a bottom frame and an upper cover, the bottom frame comprises a bottom shell and an annular side plate arranged on the inner wall of the bottom shell, the annular side plate is provided with an opening, the upper cover is arranged on the bottom shell and covers the annular side plate, the inner wall of the annular side plate, part of the bottom shell and part of the upper cover form the first cavity, the outer wall of the annular side plate, part of the bottom shell and part of the upper cover form the second cavity, the inner wall of the opening, part of the bottom shell and part of the upper cover form the connecting hole, the first through hole and the limiting hole are arranged on the upper cover, and the second through hole is arranged on the bottom shell.

6. The mechanical combination lock of claim 5, wherein, The mechanical password lock further comprises a plurality of fasteners, the bottom frame further comprises a plurality of first positioning columns arranged on the bottom shell, and the bottom frame is further provided with a third through hole penetrating the bottom shell and the first positioning column in sequence. The upper cover comprises an upper shell and a plurality of second positioning columns arranged on the upper shell, the upper shell is connected with the bottom shell and forms the inner cavity, the first positioning column and the second positioning column are located in the second cavity, the second positioning column is provided with a first threaded hole, the limiting plate is further provided with a plurality of first positioning holes, the first positioning column is sleeved in the first positioning hole, the outer diameter of the first positioning column is smaller than the inner diameter of the first positioning hole, and the fastener is connected with the first threaded hole after penetrating the third through hole.

7. The mechanical combination lock of claim 6, wherein, The knob assembly comprises a knob body, a separating wheel, a dial, a dial seat and a third spring, the separating wheel, the dial, the dial seat and the third spring are located in the second cavity, the dial seat comprises a base fixed in the inner cavity and a plurality of protruding columns arranged on the base, the base is provided with a second through hole, and each protruding column is annularly arranged outside the second through hole. The dial is provided with a third through hole, the first positioning groove and a plurality of fourth through holes, each fourth through hole is annularly arranged outside the third through hole, and the first positioning groove is arranged on the outer side wall of the dial. The separating wheel is provided with a fourth through hole in a polygonal structure and a plurality of grooves annularly arranged outside the fourth through hole, and the number of the protruding columns is less than the number of the grooves. The knob body comprises a knob disc, a holding part and a rotating rod, the rotating rod and the holding part are respectively arranged on the front and back sides of the knob disc, the outer side wall of the rotating rod is a polygonal structure matched with the fourth through hole, the convex column is inserted into the corresponding recess after passing through the corresponding fourth through hole, one end of the third spring is in abutment with the inner wall of the inner cavity and the other end is in abutment with the separating wheel after sequentially passing through the second through hole and the third through hole, the knob disc and the holding part are located outside the lock frame, the rotating rod is inserted into the third spring after passing through the fourth through hole, the knob disc is provided with a plurality of marks, and each mark is annularly arranged outside the holding part.

8. The mechanical password lock of claim 7, wherein, The knob assembly further comprises a fourth spring and a first ball, the rotating rod comprises a first rod body connected with the knob disc and a second rod body connected with the first rod body, the outer side wall of the first rod body is provided with a clamping groove, the inner wall of the limiting hole is provided with a plurality of second positioning grooves corresponding to each mark, the first ball is installed in the clamping groove through the fourth spring, and the first ball is partially exposed outside the clamping groove and is clamped on one of the second positioning grooves, the outer side wall of the second rod body is a polygonal structure, and the second rod body is inserted into the third spring after passing through the fourth through hole.

9. The mechanical password lock of claim 7, wherein, The mechanical password lock further comprises a setting plate and an adjusting piece, the setting plate and the adjusting piece are located in the second cavity, the setting plate comprises a second plate body and a plurality of hooks respectively arranged at the two side ends of the second plate body, the second plate body is located on the side of the separating wheel away from the limiting plate, the second plate body is provided with a second threaded hole, a plurality of second positioning holes and a plurality of fifth through holes, the second positioning column passes through the second positioning hole; The upper cover is further provided with an avoiding hole in communication with the second cavity, the bottom frame further comprises a third positioning column arranged on the bottom shell, the limiting plate is further provided with a third positioning hole and a plurality of second notched grooves, the third positioning column is located in the inner cavity and passes through the third positioning hole, the inner diameter of the third positioning hole is greater than the outer diameter of the third positioning column, the adjusting piece is threadedly installed on the second threaded hole and is in abutment with the third positioning column, the adjusting piece is correspondingly arranged with the avoiding hole, the hook passes through the second notched groove and is clamped with the limiting plate, and the rotating rod sequentially passes through the fifth through hole, the fourth through hole and the third spring.

10. The mechanical password lock of claim 9, wherein, The knob assembly further comprises a plurality of second balls, the side of the separating wheel away from the limiting plate is provided with a plurality of embedding grooves, the second balls are installed in the embedding grooves, and the second balls are partially exposed outside the separating wheel and are in abutment with the setting plate.

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