A mechanical password lock for quick password replacement and a method for modifying password

Abstract

The present application relates to the technical field of lock, in particular to a mechanical password lock capable of quickly changing password and a method for modifying password, the password lock comprises a switch piece, a plurality of keys, a handle, a reset mechanism and a code changing mechanism, a plurality of first grooves are formed on the switch piece, and a locking part is arranged between every two first grooves, the keys are located in the first grooves, second grooves and third grooves are formed on the side walls of the keys, the keys comprise password keys and common keys, the second groove of the password key faces the switch piece, and the third groove of the common key faces the switch piece, the embodiment of the present application has appropriate complexity, high safety and reliability and extremely low cracking probability, in addition, the embodiment of the present application does not need key, power supply and battery, and has no waste pollutants, the whole mechanical structure is adopted, the working environment can be adapted to, the use range is wide, the handle is rotated to unlock, the operation is simple, the unlocking time is short, the password can be conveniently changed, and the operation is easy.

Description

Technical Field

[0001] This invention relates to the field of lock technology, specifically a mechanical combination lock with a quick password change mechanism and a method for modifying the password. Background Technology

[0002] Currently, domestic combination locks are generally divided into three main categories: mechanical combination locks, electronic combination locks, and electromechanical combination locks. Mechanical combination locks have a long history. With people's higher requirements for the performance of anti-theft locks and the development of digital technology, a new type of electronic combination lock controlled by a microprocessor has been widely used in recent years. Its characteristics are: no key required, electronic touch buttons for inputting the password, easy and convenient to open, a large number of possible passwords, and easy to change the password. However, its disadvantages are also obvious, such as the reliability and stability of electronic components, the vibration resistance of electronic circuit boards, and battery life issues, all of which can easily cause the electronic lock to fail to open. In practical applications, it can be found that electronic combination locks are usually expensive, and because they rely on electrical energy, they are quite sensitive to harsh environments such as electromagnetic fields, temperature, and humidity. Once they fail, it will have serious consequences.

[0003] Therefore, a mechanical combination lock with a quick password change function is provided. Summary of the Invention

[0004] The purpose of this invention is to provide a mechanical combination lock with a quick password change and a method for modifying the password, so as to at least solve one of the problems mentioned in the background art.

[0005] The technical solution of this invention is:

[0006] A mechanical combination lock with quick password change capability, comprising:

[0007] A switch piece, wherein a plurality of first slots are provided on the switch piece, and a locking part is provided between every two first slots;

[0008] The device includes multiple buttons located within a first slot. A second and a third slot are formed on the sidewall of each button. The plane of the second slot is perpendicular to the plane of the third slot. When the button is not pressed, the second slot is higher than the switch piece, and the third slot is flush with the switch piece. When the button is pressed, the second slot is flush with the switch piece, and the third slot is lower than the switch piece. The buttons include a password key and a normal key. Both the password key and the normal key have a second and a third slot. The second slot of the password key faces the switch piece, and the third slot of the normal key faces the switch piece.

[0009] The handle, when rotated, causes the switch plate to move horizontally; when the key is pressed, the locking part of the switch plate can pass through the second slot of the key and the third slot of the normal key.

[0010] A reset mechanism that enables the button to be reset after being pressed.

[0011] A code-changing mechanism that drives the button to rotate.

[0012] Furthermore, the code-changing mechanism includes a first cam, a code-changing component, and a code-changing piece. The first cam rotates to drive the code-changing piece to translate. The code-changing piece is provided with a code-changing hole, and the code-changing component is provided with a code-changing protrusion. The code-changing protrusion is located inside the code-changing hole. The code-changing component is sleeved on the button and rotatably connected to the button. The code-changing component is provided with a quarter-circle arc groove. A first notch is provided below one end of the arc groove near the first cam, and a second notch is provided below the other end. A first protrusion is provided on the side of the button. When the button is not pressed, the first protrusion is located inside the arc groove.

[0013] Furthermore, a camshaft is fixedly connected below the first cam, and a limiting groove is provided on the side of the camshaft away from the handle. A limiting piece is sleeved on the camshaft and is inserted into the limiting groove. A first spring is provided between the end of the limiting piece away from the limiting groove and the first cam, and the switch piece can push the limiting piece away from the limiting groove.

[0014] Furthermore, the reset mechanism includes a reset button and a reset plate. The reset button drives the reset plate to move horizontally. A latch is provided on the side wall of the button, and a spring is provided on the reset plate corresponding to the latch. When the button is pressed, the latch engages with the spring. When the reset button is pressed, the reset plate drives the spring to move horizontally, and the latch disengages from the spring.

[0015] Furthermore, the button comprises, from top to bottom, a pressure plate, a key component, and a positioning seat. The fastener is sleeved on the key component. The pressure plate and the key component are connected by a second spring, and the key component and the positioning seat are slidably connected by a third spring.

[0016] Furthermore, the code-changing mechanism also includes a positioning piece and a second cam. The second cam is located below the first cam and is fixedly connected to the first cam. The second cam drives the positioning piece to translate. The positioning piece has multiple positioning holes, and positioning protrusions are provided in the positioning holes. The bottom of the positioning seat is located in the positioning holes, and a positioning groove is provided on the bottom surface of the positioning seat. The positioning protrusions are inserted into the positioning groove or moved away from the positioning groove as the positioning piece translates.

[0017] Furthermore, the first cam and the second cam are fixedly connected. The first cam has a keyhole in the middle. Both the first cam and the second cam rotate around the keyhole. The first cam is a quarter-circle arc shape. The first cam includes a first right-angled side, a second right-angled side, a first arc side, and a second arc side. The second arc side is located between the first right-angled side and the second right-angled side. The keyhole is equidistant from the first right-angled side, the second arc side, and the second right-angled side. The keyhole is more equidistant from the first arc side than from the second right-angled side. The second cam includes a first right-angled side and a third arc side. The rotation axis of the second cam is less equidistant from the first right-angled side than from the third arc side. The first right-angled side is parallel to the first right-angled side. When the code is not changed, the first right-angled side is in contact with the code-changing piece and the positioning piece.

[0018] Furthermore, it also includes a base, in which the switch plate, button, handle, reset mechanism and code-changing mechanism are all located. A ball is connected to the side wall of the camshaft by a fourth spring. A receiving groove is provided on the base near the ball, and a rounded corner is provided on one side of the receiving groove.

[0019] Furthermore, the handle is fixedly connected to a third cam, and the rotation of the third cam causes the switch piece to translate.

[0020] This invention also provides a method for modifying the password of the aforementioned quick-change mechanical combination lock. The modification steps are as follows:

[0021] S1. Enter the correct password;

[0022] S2, Rotating handle

[0023] S3. Insert the key and rotate it 90° clockwise.

[0024] S4. Release the handle;

[0025] S5. Press the reset button;

[0026] S6. Rotate the key clockwise 90°;

[0027] S7. Enter the new password;

[0028] S8. Rotate the key clockwise 180°;

[0029] S9. Press the reset button;

[0030] S10. Remove the key that changed the code.

[0031] This invention provides an improved mechanical combination lock for quick password changing and a method for modifying the password, which, compared with the prior art, has at least one of the following improvements and advantages:

[0032] The embodiments of this invention have an appropriate level of complexity and offer high security and reliability with an extremely low probability of being cracked. Furthermore, these embodiments require no key, power supply, or batteries, and generate no waste or pollutants. Employing a fully mechanical structure, they can withstand harsh working environments, have a wide range of applications, and utilize a rotating handle for easy unlocking, resulting in simple operation, short unlocking time, and convenient password changes. Attached Figure Description

[0033] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0034] Figure 1 This is a schematic diagram of the mechanical combination lock described in this invention;

[0035] Figure 2 This is a schematic diagram of the structure of the password key and the ordinary key described in this invention;

[0036] Figure 3 is a schematic diagram of the alteration of the mechanical combination lock described in this invention;

[0037] Figure 4 This is a schematic diagram of the structure of the positioning piece described in this invention;

[0038] Figure 5 This is a schematic diagram of the structure of the code-changing component described in this invention;

[0039] Figure 6 is a partial structural schematic diagram of the button described in this invention;

[0040] Figure 7 This is a schematic diagram of the structure of the button described in this invention;

[0041] Figure 8 This is a schematic diagram of the reset mechanism described in this invention;

[0042] Figure 9 This is a schematic diagram of the button from another angle according to the present invention;

[0043] Figure 10 This is a schematic diagram of the structure of the receiving groove described in this invention;

[0044] Figure 11 This is a partial structural diagram of the mechanical combination lock described in this invention;

[0045] Figure 12 This is a schematic diagram of the structure of the limiting piece described in this invention;

[0046] Figure 13 This is a schematic diagram of the structure of the first cam of the present invention;

[0047] Figure 14 This is a schematic diagram of the structure of the second cam of the present invention;

[0048] Figure 15 This is a schematic diagram of the structure of the code-changing hole described in this invention.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Switch plate; 2. Button; 3. Handle; 4. Reset mechanism; 5. Code change mechanism; 6. Limit plate;

[0051] 7. Base; 11. First groove; 12. Locking part; 21. Second groove; 22. Third groove; 23. First protrusion; 24. Buckle; 25. Pressure plate; 26. Password component; 27. Positioning seat; 271. Positioning groove; 28. Second spring; 29. ​​Third spring; 201. Normal key; 202. Password key; 31. Third cam; 41. Reset key; 42. Reset plate; 421. Spring; 51. First cam; 52. Code changer;

[0052] 53. Code-changing chip; 54. Positioning chip; 55. Second cam; 56. Camshaft; 511. Limiting groove;

[0053] 512. Keyhole; 513. First right-angled side; 514. Second right-angled side; 515. First rounded side;

[0054] 516. Second rounded edge; 521. Rounded groove; 522. First notch; 523. Second notch; 524. Code changer protrusion; 531. Code changer hole; 541. Positioning hole; 542. Positioning protrusion; 551. First straight edge; 552. Third rounded edge; 562. Ball; 61. First spring; 71. Receiving groove; 711. Rounded corner. Detailed Implementation

[0055] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described.

[0056] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "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 invention 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 invention.

[0057] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. It should also be understood that the term "and / or" as used in this application specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. The terms "comprising," "including," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0058] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0059] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0060] This invention provides an improved mechanical combination lock for quick password changing and a method for modifying the password. The technical solution of this invention is as follows:

[0061] like Figure 1 As shown, a mechanical combination lock with quick password change includes: a switch plate 1, multiple buttons 2, a handle 3, a reset mechanism 4, and a password change mechanism 5.

[0062] In some embodiments, such as Figure 11 As shown, the switch piece 1 has multiple first slots 11, and a locking part 12 is provided between every two first slots 11. The first slots 11 are used to avoid the button 2, and the locking part 12 is used to lock the handle 3, so that the handle 3 cannot be rotated.

[0063] In some embodiments, such as Figure 2 As shown in Figure 6(a), the button 2 is located within the first groove 11. The side wall of the button 2 has a second groove 21 and a third groove 22, with the plane of the second groove 21 perpendicular to the plane of the third groove 22. Figure 2As shown, when button 2 is not pressed, the second groove 21 is higher than the switch piece 1, and the third groove 22 is flush with the switch piece 1. When button 2 is pressed, the second groove 21 is flush with the switch piece 1, and the third groove 22 is lower than the switch piece 1. The button 2 includes a password key 202 and a normal key 201. Both the password key 202 and the normal key 201 are provided with a second groove 21 and a third groove 22. The second groove 21 of the password key 202 faces the switch piece 1, and the third groove 22 of the normal key 201 faces the switch piece 1. When the normal key 201 is not pressed, the third groove 22 faces the switch piece 1, and the locking part 12 on the switch piece 1 can pass through the third groove 22 of the normal key 201. When the wrong password is entered, that is, when the normal key 201 is pressed, the third groove 22 drops, and the locking part 12 cannot pass through the third groove 22, achieving the effect of preventing unlocking when the wrong password is entered. When the password key 26 is not pressed, the second groove 21 faces the switch piece 1 and is higher than the switch piece 1, so the locking part 12 of the switch piece 1 cannot pass through, achieving the effect of not being able to unlock without entering a password; when the correct password key 202 is pressed, the second groove 21 of the password key 202 descends, and the locking part 12 can pass through, thus realizing the unlocking function.

[0064] In some embodiments, such as Figure 11 As shown in Figure 3(c), when the handle 3 is rotated, the switch piece 1 is moved horizontally. When the password key 202 is pressed, the locking part 12 of the switch piece 1 can pass through the second groove 21 of the password key 202 and the third groove 22 of the ordinary key 201.

[0065] In some embodiments, such as Figure 8 As shown, the reset mechanism 4 enables the button 2 to be reset after being pressed. The reset mechanism 4 includes a reset button 41 and a reset plate 42. The reset button 41 drives the reset plate 42 to move horizontally. Specifically, the reset plate 42 has an inclined surface near the reset button 41. When the reset button 41 is pressed, it squeezes the inclined surface, thereby causing the reset plate 42 to move horizontally. Figure 9 As shown, a latching piece 24 is provided on the side wall of the button 2, and a spring piece 421 is provided on the reset plate 42 corresponding to the latching piece 24. When the button 2 is pressed, the latching piece 24 and the spring piece 421 are engaged. When the reset button 41 is pressed, the reset plate 42 drives the spring piece 421 to move horizontally, and the latching piece 24 and the spring piece 421 are disengaged, thereby realizing the reset operation of the button 2.

[0066] In some embodiments, such as Figure 9As shown, the button 2, from top to bottom, includes a pressure plate 25, a key component 26, and a positioning seat 27. A clip 24 is fitted onto the key component 26. The pressure plate 25 and the key component 26 are connected by a second spring 28, and the key component 26 and the positioning seat 27 are slidably connected by a third spring 29. The pressure plate 25 is used to lower the key component 26, which is used to unlock and lock the switch piece 1. The clip 24 cooperates with the spring piece 421 to fix and reset the button 2 after it is pressed.

[0067] In some embodiments, the code-changing mechanism 5 drives the button 2 to rotate. (See Figure 3(a)). Figure 5 As shown in Figure 6, the code-changing mechanism 5 includes a first cam 51, a code-changing component 52, and a code-changing piece 53. The rotation of the first cam 51 drives the code-changing piece 53 to translate. Figure 15 As shown, the code-changing chip 53 is provided with a code-changing hole 531, such as... Figure 5 As shown in Figure 6, the code-changing component 52 is provided with a code-changing protrusion 524, which is located within the code-changing hole 531. As shown in Figure 6, the code-changing component 52 is sleeved on the button 2 and rotatably connected to the button 2. Figure 5 As shown, the code-changing component 52 is provided with a quarter-circle arc groove 521. The arc groove 521 is provided with a first notch 522 below one end near the first cam 51, and a second notch 523 below the other end. The button 2 is provided with a first protrusion 23 on its side. When the button 2 is not pressed, the first protrusion 23 is located in the arc groove 521.

[0068] In some embodiments, as shown in FIG3(a), a camshaft 56 is fixedly connected below the first cam 51, such as... Figure 12 As shown, a limiting groove 511 is provided on the side of the camshaft 56 away from the handle 3. A limiting piece 6 is sleeved on the camshaft 56, and the limiting piece 6 is engaged in the limiting groove 511. Figure 11 As shown, a first spring 61 is provided between the end of the limiting piece 6 away from the limiting groove 511 and the first cam 51. The switch piece 1 can push the limiting piece 6 away from the limiting groove 511. The limiting piece 6 is used to lock into the limiting groove 511 to limit the rotation of the first cam 51, and the first spring 61 is used to reset the limiting piece 6.

[0069] In some embodiments, as shown in Figure 3(a), Figure 4 and Figure 9As shown, the code-changing mechanism 5 further includes a positioning piece 54 and a second cam 55. The second cam 55 is located below the first cam 51 and is fixedly connected to the first cam 51. The second cam 55 drives the positioning piece 54 to translate. The positioning piece 54 has multiple positioning holes 541, and positioning protrusions 542 are provided in the positioning holes 541. The bottom of the positioning seat 27 is located in the positioning holes 541, and the bottom surface of the positioning seat 27 is provided with a positioning groove 271. The positioning protrusions 542 are inserted into or moved away from the positioning groove 271 as the positioning piece 54 translates. When the combination lock is used normally, the key 2 does not need to be rotated. The positioning piece 54 and the positioning protrusions 542 are used to restrict the rotation of the key 2.

[0070] In some embodiments, as shown in Figure 3(a), Figure 13 and Figure 14 As shown, the first cam 51 and the second cam 55 are fixedly connected. The first cam 51 has a keyhole 512 in the middle. Both the first cam 51 and the second cam 55 rotate around the keyhole 512. The first cam 51 is a quarter-circle arc shape. The first cam 51 includes a first right-angled side 513, a second right-angled side 514, a first arc side 515, and a second arc side 516. The second arc side 516 is located between the first right-angled side 513 and the second right-angled side 514. The keyhole 512 is equidistant from the first right-angled side 513, the second arc side 516, and the second right-angled side 514. The keyhole 512 is more distant from the first arc side 515 than from the second right-angled side 514. The second cam 55 includes a first right-angled side 551 and a third arc side 552. The distance between the rotation axis of the second cam 55 and the first right-angled side 551 is less than the distance between the rotation axis and the third arc side 552. The first right-angled side 551 is parallel to the first right-angled side 513. As shown in Figure 3(a), Figure 13 and Figure 14 As shown, when the code is not modified, the first right-angled edge 513 is in contact with the code modification piece 53, and the first straight edge 551 is in contact with the positioning piece 54.

[0071] The initial state of the code-changing mechanism 5 is shown in Figure 3(a). Figure 13 and Figure 14 As shown, at this time, the first right-angled edge 513 is in contact with the code-changing piece 53, the first straight edge 551 is in contact with the positioning piece 54, the limiting piece 6 is inserted into the limiting groove 511, and the first cam 51 cannot rotate. Therefore, without knowing the password, the code-changing operation cannot be performed.

[0072] When you need to reset your password for a password change operation, the specific steps are as follows:

[0073] 1. As shown in Figure 3(b), first press the correct password key 202, then turn the handle 3 to move the switch piece 1 to the left. The switch piece 1 pushes the limiting piece 6 to the left, moving the limiting piece 6 away from the limiting groove 511. Only then can the first cam 51 rotate.

[0074] 2. As shown in Figure 3(c), inserting the key into the keyhole 512 of the first cam 51 causes the first cam 51 and the second cam 55 to rotate 90° clockwise. At this time, the first straight edge 551 of the second cam 55 moves away from the positioning piece 54, and the third arcuate edge 552 moves closer to the positioning piece 54. Since the distance between the rotation axis of the second cam 55 and the first straight edge 551 is less than the distance between the rotation axis and the third arcuate edge 552, the second cam 55 pushes the positioning piece 54 to the right. At this time, the positioning protrusion 542 moves away from the positioning groove 271, and the button 2 can rotate freely. When the first cam 51 rotates 90° clockwise, the first right-angled side 513 of the first cam 51 moves away from the code-changing piece 53, and the second right-angled side 514 moves closer to the code-changing piece 53. Since the keyhole 512 is equidistant from the first right-angled side 513, the second arc side 516, and the second right-angled side 514, the rotation of the first cam 51 at this time will not push the code-changing piece 53, and the code-changing piece 53 remains stationary. Then, the handle 3 is released, and the switch piece 1 resets. After the switch piece 1 resets, since the first cam 51 has rotated 90° clockwise, the limiting piece 6 cannot be temporarily engaged in the limiting groove 511, and the first cam 51 and the second cam 55 can continue to rotate.

[0075] III. As shown in Figure 3(d), first press the reset button 41 to reset the password key 202; then continue to rotate the key clockwise by 90°, causing the first cam 51 and the second cam 55 to continue rotating clockwise by 90°. At this time, the third arc edge 552 of the second cam 55 is always in contact with the positioning piece 54, while the second right-angled edge 514 of the first cam 51 is away from the code-changing piece 53, and the first arc edge 515 is close to the code-changing piece 53. Since the distance between the keyhole 512 and the first arc edge 515 is greater than its distance from the second right-angled edge 514, the first arc edge 515 pushes the code-changing piece 53 to the right. The code-changing piece 53 drives the code-changing component 52 to rotate through the code-changing hole 531 and the code-changing protrusion 524. As shown in Figures 6(a) and (b), the password key 202 and the normal key 201 have two states. Figure 6(a) shows the normal key 201, in which the first protrusion 23 of the normal key 201 is located at the right end of the arc groove 521, and the clockwise rotation of the code-changing component 52 will not cause the normal key 201 to rotate. Figure 6(b) shows the password key 202, in which the first protrusion 23 of the password key 202 is located at the left end of the arc groove 521, and the rotation of the code-changing component 52 will cause the password key 202 to rotate. That is to say, as shown in Figure 6(b), all password keys 202 are transformed into normal keys 201 as the code-changing component 52 rotates.

[0076] IV. As shown in Figure 3(e), press the newly set password, as follows: Figure 7 As shown, at this time, the first protrusion 23 of the button 2 descends into the first notch 522 of the code-changing piece 52. Then, the key is rotated 180° clockwise, and the first cam 51 and the second cam 55 rotate 180° clockwise. The first cam 51 and the second cam 55 return to their un-code-changing state, that is, the first right-angled edge 513 contacts the code-changing piece 53, and the first straight edge 551 contacts the positioning piece 54. The positioning piece 54 and the code-changing piece 53 both move to the left, and the positioning protrusion 542 is inserted into the positioning groove 271. The limiting piece 6 is also re-inserted into the limiting groove 511. The translation of the code-changing piece 53 causes the code-changing component 52 to rotate counterclockwise. At this time, the first protrusion 23 of the ordinary key 201 is located to the left of the arc groove 521 of the code-changing component 52. Therefore, the counterclockwise rotation of the code-changing component 52 does not cause the ordinary key 201 to rotate. However, the first protrusion 23 of the newly set password key 202 is located within the first notch 522. Therefore, the code-changing component 52 will cause the new password key 202 to rotate. After the password key 202 rotates, the second groove 21 aligns with the switch piece 1. The new password key 202 is then set.

[0077] 5. As shown in Figures 3(f) and (g), press the reset button 41 to reset the password key 202, and then remove the key to complete the password modification operation.

[0078] In some embodiments, such as Figure 10 As shown, the system also includes a base 7. The switch piece 1, button 2, handle 3, reset mechanism 4, and code-changing mechanism 5 are all located within the base 7. A ball bearing 562 is connected to the side wall of the camshaft 56 via a fourth spring. A receiving groove 71 is provided on the base 7 near the ball bearing 562. A rounded corner 711 is provided on one side of the receiving groove 71. The rounded corner 711 is located on the side that the ball bearing 562 will touch when the camshaft 56 rotates clockwise. The rounded corner 711 is used to limit the rotation direction of the camshaft 56, so that the camshaft 56 can only rotate clockwise. When rotating clockwise, the rounded corner 711 causes the ball bearing 562 to retract; when rotating counterclockwise, the ball bearing 562 is stuck against the side wall of the receiving groove 71, preventing the camshaft 56 from rotating counterclockwise.

[0079] In some embodiments, such as Figure 11 As shown, the handle 3 is fixedly connected to a third cam 31, and the rotation of the third cam 31 drives the switch piece 1 to translate.

[0080] This invention also provides a method for modifying the password of the aforementioned quick-change mechanical combination lock. The modification steps are as follows:

[0081] S1. Enter the correct password;

[0082] S2, Rotating handle 3

[0083] S3. Insert the key and rotate it 90° clockwise.

[0084] S4, release handle 3;

[0085] S5. Press the reset button 41;

[0086] S6. Rotate the key clockwise 90°;

[0087] S7. Enter the new password;

[0088] S8. Rotate the key clockwise 180°;

[0089] S9. Press the reset button 41;

[0090] S10. Remove the key that changed the code.

[0091] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A mechanical combination lock with a quick-change combination, characterized in that, include: A switch piece, wherein a plurality of first slots are provided on the switch piece, and a locking part is provided between every two first slots; The device includes multiple buttons located within a first slot. A second and a third slot are formed on the sidewall of each button. The plane of the second slot is perpendicular to the plane of the third slot. When the button is not pressed, the second slot is higher than the switch piece, and the third slot is flush with the switch piece. When the button is pressed, the second slot is flush with the switch piece, and the third slot is lower than the switch piece. The buttons include a password key and a normal key. Both the password key and the normal key have a second and a third slot. The second slot of the password key faces the switch piece, and the third slot of the normal key faces the switch piece. The handle, when rotated, causes the switch plate to move horizontally; when the key is pressed, the locking part of the switch plate can pass through the second slot of the key and the third slot of the normal key. A reset mechanism that enables the button to be reset after being pressed. A code-changing mechanism, which drives the button to rotate; The code-changing mechanism includes a first cam, a code-changing component, and a code-changing piece. The first cam rotates, causing the code-changing piece to translate. The code-changing piece is provided with a code-changing hole, and the code-changing component is provided with a code-changing protrusion located within the code-changing hole. The code-changing component is sleeved on the button and rotatably connected to the button. The code-changing component is provided with a quarter-circle arc groove. A first notch is provided below one end of the arc groove near the first cam, and a second notch is provided below the other end. A first protrusion is provided on the side of the button. When the button is not pressed, the first protrusion is located within the arc groove.

2. The mechanical combination lock for quick password changing according to claim 1, characterized in that, A camshaft is fixedly connected below the first cam. A limiting groove is provided on the side of the camshaft away from the handle. A limiting piece is sleeved on the camshaft and is inserted into the limiting groove. A first spring is provided between the end of the limiting piece away from the limiting groove and the first cam. The switch piece can push the limiting piece away from the limiting groove.

3. A mechanical combination lock for quick password changing according to claim 2, characterized in that, The reset mechanism includes a reset button and a reset plate. The reset button drives the reset plate to move horizontally. A latch is provided on the side wall of the button, and a spring is provided on the reset plate corresponding to the latch. When the button is pressed, the latch engages with the spring. When the reset button is pressed, the reset plate drives the spring to move horizontally, and the latch disengages from the spring.

4. A mechanical combination lock for quick password changing according to claim 3, characterized in that, The button comprises, from top to bottom, a pressure plate, a key component, and a positioning seat. The fastener is sleeved on the key component. The pressure plate and the key component are connected by a second spring, and the key component and the positioning seat are slidably connected by a third spring.

5. A mechanical combination lock for quick password changing according to claim 4, characterized in that, The code-changing mechanism further includes a positioning piece and a second cam. The second cam is located below the first cam and is fixedly connected to the first cam. The second cam drives the positioning piece to translate. The positioning piece has multiple positioning holes. Positioning protrusions are provided in the positioning holes. The bottom of the positioning seat is located in the positioning holes. The bottom surface of the positioning seat is provided with a positioning groove. The positioning protrusions are inserted into the positioning groove or moved away from the positioning groove as the positioning piece translates.

6. A mechanical combination lock for quick password changing according to claim 5, characterized in that, The first cam and the second cam are fixedly connected. The first cam has a keyhole in the middle. Both the first cam and the second cam rotate around the keyhole. The first cam is a quarter-circle arc shape and includes a first right-angled side, a second right-angled side, a first arc side, and a second arc side. The second arc side is located between the first right-angled side and the second right-angled side. The keyhole is equidistant from the first right-angled side, the second arc side, and the second right-angled side. The keyhole is more equidistant from the first arc side than from the second right-angled side. The second cam includes a first right-angled side and a third arc side. The rotation axis of the second cam is less equidistant from the first right-angled side than from the third arc side. The first right-angled side is parallel to the first right-angled side. When the code is not changed, the first right-angled side is in contact with the code-changing piece and the positioning piece.

7. A mechanical combination lock for quick password changing according to claim 6, characterized in that, It also includes a base, and the switch plate, button, handle, reset mechanism and code change mechanism are all located in the base. The camshaft sidewall is connected to a ball by a fourth spring. The base is provided with a receiving groove near the ball, and the receiving groove is provided with a rounded corner on one side.

8. A mechanical combination lock for quick password changing according to claim 1, characterized in that, The handle is fixedly connected to a third cam, and the rotation of the third cam causes the switch piece to move horizontally.

9. A method for modifying a password, characterized in that, The steps for modifying the password of the mechanical combination lock with quick password change as described in any one of claims 6-7 are as follows: S1. Enter the correct password; S2, Rotating handle S3. Insert the key and rotate it 90° clockwise. S4. Release the handle; S5. Press the reset button; S6. Rotate the key clockwise 90°; S7. Enter the new password; S8. Rotate the key clockwise 180°; S9. Press the reset button; S10. Remove the key that changed the code.

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