Memory combination lock

Abstract

The present invention provides a memory combination lock, comprising a lock base, a number-changing knob, a number-changing gear body, a number wheel assembly, a spring, a lock bolt, and an upper cover. The number wheel assembly comprises a plurality of number wheels, a plurality of lock bushings, and a plurality of indicator plates. Each of the lock bushings is disposed in each number wheel. A large-diameter through-hole and a small-diameter through-hole are disposed in the lock bushing. A notch is disposed in the small-diameter through-hole. A corresponding groove is disposed on the outer wall of the lock bushing corresponding to the position of the notch. An inlay is convexly disposed in the middle through-hole of each indicator plate and is embedded in the corresponding groove of each lock bushing. An indicator protrusion is disposed on the outer circumferential wall of each of the ten indicator plates, respectively, corresponding to the positions of the ten digits (0-9) on the number wheel. In this way, each combination lock is formed by the combination of different indicator plates and lock bushings to form an internal code, and the original password set for the combination lock can be retrieved by using the internal code.

Description

Technical Field

[0001] The present invention relates to a memory combination lock, in particular to a combination lock structure capable of retrieving an originally set unlocking password. Background Art

[0002] Combination locks are commonly used on items such as door locks, bicycle locks, luggage, and safes. They can be unlocked without a key, avoiding the trouble caused by losing the key when opening with a traditional key. However, typical combination locks do not have a mechanism for users to retrieve the correct password. When users forget the previously set password, they must blindly try the password based on their memory or directly break the combination lock, which makes the lock unusable. Alternatively, they can hire a professional locksmith to crack the lock's password to make it work properly. This method is not only time-consuming and labor-intensive, but also often requires users to incur additional costs, resulting in user problems.

[0003] The existing combination lock generally comprises a lock shell and a number wheel group, the number wheel group is arranged in the lock shell, the number wheel group is composed of a lock bolt, a plurality of lock bushings and a plurality of wheels, the lock bushing is sleeved on the lock bolt and can limit the extension and contraction of the lock bolt, and the middle through-hole of the lock bushing is provided with a notch for the protrusion on the lock bolt to pass through, and the wheel is sleeved on the lock bushing and can rotate with the lock bushing. When the wheel is rotated, the lock bushing can be rotated relative to the lock bolt. When the wheels on the combination lock are rotated to the set password, the locks are unlocked. The notches on the buckle bushing will be arranged in a row, which can release the axial limit between the lock bushing and the lock bolt, so that the protrusion of the lock bolt can pass through the notches on the lock bushing and slide axially in the lock bushing, thereby unlocking the lock bolt. However, in order to facilitate the assembly of each lock bushing and each number wheel, the existing number wheel assembly has corresponding grooves on the outer wall surface of each lock bushing as marks to facilitate the assembly by the assembler. Moreover, the notches and grooves of each existing lock bushing are all set at the same position, which is convenient for manufacturing and assembly, but easy to crack. Summary of the Invention

[0004] The main purpose of the present invention is to provide a memory combination lock which can effectively solve the shortcomings of the existing combination locks when in use.

[0005] The present invention provides a memory combination lock, comprising:

[0006] A lock base, the lock base having a receiving groove, a groove formed at one end of the lock base, a first protrusion formed in the receiving groove of the lock base at a position corresponding to the groove, a first through-hole and two insertion grooves formed on an inner wall of the groove, the first through-hole and the two insertion grooves being connected to the receiving groove, a notch formed on the lock base being connected to the first through-hole, a second protrusion formed inwardly at the other end of the receiving groove of the lock base at a position corresponding to the first protrusion, a second through-hole formed in the second protrusion, and a notch formed on the second through-hole;

[0007] A number-changing knob is disposed in the groove of the lock base, and a protrusion is provided on the outer end surface of the number-changing knob, and a notch is provided on the protrusion. A limiting protrusion is also provided on the outer end surface of the number-changing knob, and two guide grooves are provided on the other end of the number-changing knob, and one side of the two guide grooves is configured as an arc section;

[0008] A number-changing body is sleeved on the first protrusion of the lock base, the number-changing body is provided with a through hole, and one end of the number-changing body is provided with two guide protrusions facing each other, the two guide protrusions are respectively inserted into the two insertion grooves of the lock base and located in the two guide grooves of the number-changing knob, the opposite side edges of the two guide protrusions are configured as arc surfaces, and a positioning groove is provided on the wall surface of the number-changing body, wherein one of the positioning grooves is aligned with the groove of the lock base;

[0009] A number wheel set is arranged in the receiving groove of the lock seat. The number wheel set is composed of several number wheels, several lock bushings and several indicator plates. The outer wall surface of each number wheel is ringed with ten numbers (0 to 9). One end of the inner wall surface of each number wheel is ringed with several positioning slots. The other end of each number wheel is provided with a groove. The middle of each number wheel is provided with a through hole. Each lock bushing is respectively arranged in each number wheel. The outer wall surface of the lock bushing is provided with a large diameter wall surface and a small diameter wall surface. The small diameter wall surface is provided through the through hole of the number wheel. The lock bushing is provided with a large diameter through hole and a small diameter through hole. A notch is provided on the small diameter through hole. The outer wall surface of the lock bushing corresponds to A corresponding groove is provided at the position of the notch, and a plurality of positioning protrusions are provided on the outer wall surface of the locking bushing for being locked in the positioning groove of the character wheel. Each indicator plate is respectively provided on one side of each character wheel. The indicator plates are manufactured in ten types. Each indicator plate has a through hole in the middle, and an inlay is protruded in the through hole of each indicator plate. The inlay of the indicator plate is for being locked in the corresponding groove of the locking bushing. An indicating convex piece is provided on the outer peripheral wall surface of each of the ten indicator plates, corresponding to the positions of the ten numbers (0-9) on the character wheel, so that the indicating protrusions of the ten indicator plates correspond to the corresponding positions of the inlays for the ten numbers on the character wheel. A portion of each indicator plate is provided in the groove of each character wheel.

[0010] a spring sleeved on the second protrusion of the lock base;

[0011] A lock bolt is inserted into the number-changing gear body and the number wheel assembly, and a push block is protruded from the lock bolt. A limiting convex strip is provided on one side of the push block, and a plurality of grooves are provided on the limiting convex strip;

[0012] An upper cover is provided on the lock base, and a sliding groove is provided on the top surface of the upper cover for the push block of the lock bolt to pass through. A through hole is provided on the top surface of the upper cover corresponding to the position of each wheel of the number wheel group. A through hole is provided on one end surface of the upper cover, and the through hole of the upper cover is for the convex body of the number change knob to pass through. An arc groove is provided on the inner wall surface of the upper cover, and the arc groove is for the limiting convex column of the number change knob to be set in.

[0013] The memory combination lock of the present invention has a plurality of convex blocks equidistantly arranged in the receiving groove of the lock seat, and a limiting groove is formed between the convex blocks for positioning the position of each number wheel.

[0014] The memory combination lock of the present invention has a positioning groove at the bottom of the lock seat, and a positioning inlay is provided on the inner wall surface of the upper cover at a position corresponding to the positioning groove of the lock seat.

[0015] The present invention provides a memory combination lock, wherein the indicating convex pieces of the ten indicating plates are respectively: the indicating convex piece of the first indicating plate corresponds to the position of the number (1) on the character wheel, the indicating convex piece of the second indicating plate corresponds to the position of the number (2) on the character wheel, the indicating convex piece of the third indicating plate corresponds to the position of the number (3) on the character wheel, the indicating convex piece of the fourth indicating plate corresponds to the position of the number (4) on the character wheel, the indicating convex piece of the fifth indicating plate corresponds to the position of the number (5) on the character wheel, the indicating convex piece of the sixth indicating plate corresponds to the position of the number (6) on the character wheel, the indicating convex piece of the seventh indicating plate corresponds to the position of the number (7) on the character wheel, the indicating convex piece of the eighth indicating plate corresponds to the position of the number (8) on the character wheel, the indicating convex piece of the ninth indicating plate corresponds to the position of the number (9) on the character wheel, and the indicating convex piece of the tenth indicating plate corresponds to the position of the number (0) on the character wheel.

[0016] The memory combination lock of the present invention has at least one pseudo corresponding groove provided on the small diameter wall surface of the lock bushing.

[0017] The memory combination lock of the present invention has corresponding marks between the through holes on the top surface of the upper cover.

[0018] The memory combination lock of the present invention has a lock number on the upper cover.

[0019] The memory combination lock of the present invention has the advantages of utilizing the different corresponding positions of the indicator protrusions and inlays of the ten indicator plates so that each combination lock is provided with an internal code. Even if a thief peeks into the corresponding groove or pseudo-corresponding groove on the lock catch bushing inside the combination lock, he or she will still be unable to guess the exact position of the notch of the lock catch bushing and will be unable to unlock the lock, thereby effectively preventing theft. Moreover, each combination lock is provided with its own internal code, and its unlocking password can be retrieved by means of the internal code, thereby ensuring the safety of the lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a perspective exploded view of an embodiment of the present invention.

[0021] Figure 2 Shown is a three-dimensional exploded view from another angle of an embodiment of the present invention.

[0022] Figure 3 Shown is a perspective view of an indicator plate according to an embodiment of the present invention.

[0023] Figure 4 Shown is a three-dimensional combination diagram of an embodiment of the present invention.

[0024] Figure 5 Shown is a combined cross-sectional view of an embodiment of the present invention.

[0025] Figure 6 Shown is a schematic cross-sectional view of an embodiment of the present invention from above.

[0026] Figure 7 Shown Figure 6 Schematic diagram of the cross section along the AA line.

[0027] Figure 8 Shown Figure 6 Schematic diagram of the cross section of the BB section line.

[0028] Figure 9 FIG. 1 is a schematic diagram of pushing a lock bolt according to an embodiment of the present invention.

[0029] Figure 10 FIG2 is a cross-sectional view of the embodiment of the present invention showing the case where the character wheel is rotated to drive the lock bushing to lock.

[0030] Figure 11 Shown is a schematic three-dimensional diagram of the interior of a lock with a rotary sign-changing knob according to an embodiment of the present invention.

[0031] Figure 12 FIG2 is a schematic diagram showing the embodiment of the present invention in which the number-changing knob is rotated and the locking bush is pushed to disengage the number wheel buckle.

[0032] Figure 13 It is a schematic internal perspective view of an embodiment of the present invention in which the rotating character wheel drives the indicating protrusions of the indicating plate to rotate upward and align with each other.

[0033] Figure 14 It is a cross-sectional schematic diagram showing each indicator plate aligned upward in an embodiment of the present invention.

[0034] Figure 15 Shown Figure 13 A schematic cross-sectional view of the combination of the third indicator plate and the locking bushing.

[0035] Figure 16 Shown Figure 15 A cross-sectional diagram of retrieving the original password by rotating the character wheel to drive the lock bushing so that its notch aligns with the limiting ridge of the lock bolt.

[0036] Figure 17 Shown Figure 13 A schematic cross-sectional view of the combination of the fifth indicator plate and the locking bushing.

[0037] Figure 18 Shown Figure 13 A schematic cross-sectional view of the combination of the first indicator plate and the locking bushing.

[0038] Figure 19 Shown Figure 13 A schematic cross-sectional view of the assembly of the seventh indicator plate and the locking bushing.

[0039] Explanation of reference numerals: 1 lock seat; 10 receiving groove; 11 protrusion; 110 limiting groove; 12 groove; 13 first protrusion; 14 first through-hole; 15 insertion groove; 16 notch; 17 second protrusion; 170 second through-hole; 171 notch; 18 positioning groove; 21 number-changing knob; 210 protrusion; 211 notch; 212 limiting protrusion; 213 guide notch; 214 arc section; 22 number-changing gear body; 220 through-hole; 221 guide protrusion; 222 arc section; 223 positioning notch; 3 character wheel; 30 number; 31 positioning slot; 32 groove; 33 through-hole; 4 lock bushing; 40 large diameter wall; 41 small diameter wall; 42 Large diameter perforation; 43 Small diameter perforation; 44 Notch; 45 Corresponding groove; 46 Pseudo-corresponding groove; 47 Positioning convex body; 5 Indicator plate; 500 Perforation; 501 Inlay; 502 Indicator convex piece; 51 First indicator plate; 52 Second indicator plate; 53 Third indicator plate; 54 Fourth indicator plate; 55 Fifth indicator plate; 56 Sixth indicator plate; 57 Seventh indicator plate; 58 Eighth indicator plate; 59 Ninth indicator plate; 50 Tenth indicator plate; 6 Spring; 7 Lock bolt; 70 Push block; 71 Limiting convex strip; 72 Notch; 8 Upper cover; 80 Slide groove; 81 Through hole; 82 Corresponding mark; 83 Perforation; 84 Arc groove; 85 Positioning inlay; 86 Lock number. DETAILED DESCRIPTION

[0040] Regarding the technical means adopted by the present invention to achieve the above-mentioned purpose and effect, the preferred feasible embodiments are listed herewith and illustrated in conjunction with the accompanying drawings and described in detail as follows:

[0041] For an embodiment of the present invention, please refer to Figures 1 to 3As shown, the memory combination lock mainly includes: a lock base 1, the lock base 1 is provided with a receiving groove 10, the receiving groove 10 is provided with a plurality of convex blocks 11 at equal intervals, and a limiting groove 110 is formed between the convex blocks 11 and the convex blocks 11. One end of the lock base 1 is provided with a groove 12, and a first convex body 13 is provided in the receiving groove 10 of the lock base 1 at a position corresponding to the groove 12. A first through hole 14 and two insertion grooves 15 are provided on the inner wall of the groove 12. The first through hole 14 and two insertion grooves 15 are provided opposite to each other. A through hole 14 and the two insertion slots 15 are connected to the receiving slot 10. A cutout 16 is provided on the lock base 1 to connect to the first through hole 14. A second protrusion 17 is provided inwardly at the other end of the receiving slot 10 of the lock base 1 corresponding to the position of the first protrusion 13. A second through hole 170 is provided in the second protrusion 17. A notch 171 is provided on the second through hole 170. A positioning groove 18 is provided at the bottom of the lock base 1; a number change knob 21 is provided in the groove of the lock base 1. 12, the outer end surface of the number-changing knob 21 is provided with a convex body 210, and a groove 211 is provided on the convex body 210. A limiting boss 212 is further provided on the outer end surface of the number-changing knob 21, and two guide grooves 213 are provided on the other end of the number-changing knob 21. One side of the two guide grooves 213 is set as an arc section 214; a number-changing gear body 22 is provided in the receiving groove 10 of the lock seat 1 and is sleeved on the first convex body 13. The number-changing gear body 2 A through hole 220 is provided. Two guide tabs 221 are provided on one end of the number-changing body 22. The two guide tabs 221 are respectively inserted into the two insertion slots 15 of the lock base 1 and disposed in the two guide slots 213 of the number-changing knob 21. Opposite sides of the two guide tabs 221 are provided as arc surfaces 222. A positioning slot 223 is provided on the wall surface of the number-changing body 22. One of the positioning slots 223 is aligned with the slot 16 of the lock base 1.A number wheel group is provided in the receiving groove 10 of the lock seat 1. The number wheel group is composed of several character wheels 3, several lock bushings 4 and several indicator plates 5. The outer wall of each character wheel 3 is ringed with ten numbers (0 to 9) 30, one end of the inner wall of each character wheel 3 is ringed with several positioning grooves 31, the other end of each character wheel 3 is provided with a groove 32, and the middle of each character wheel 3 is provided with a through hole 33. Each lock bushing 4 is respectively provided in each character wheel 3. The outer wall of the lock bushing 4 is provided with a large diameter wall 40 and a small diameter wall 41. The small diameter wall 41 is passed through the through hole 33 of the character wheel 3. 4 is provided with a large diameter through-hole 42 and a small diameter through-hole 43, a notch 44 is provided on the small diameter through-hole 43, a corresponding groove 45 is provided on the small diameter wall surface 41 of the lock bushing 4 at a position corresponding to the notch 44, at least one pseudo corresponding groove 46 is provided on the small diameter wall surface of the lock bushing 4 at a position staggered from the corresponding groove 45, a plurality of positioning protrusions 47 are further provided on the small diameter wall surface 41 of the lock bushing 4 for being clamped in the positioning clamping groove 31 of the character wheel 3, and each of the indicator plates 5 is respectively provided on one side of each character wheel 3, and a part of each of the indicator plates 5 is provided in the groove 32 of each character wheel 3. The indicator plates 5 can be made in ten types (such as; Figure 3As shown), each of the indicator plates 5 is provided with a through hole 500 in the middle, and an inlay 501 is convexly provided in the through hole 500 of each of the indicator plates 5. The inlay 501 is provided for embedding in the corresponding groove 45 of each of the lock bushings 4. The outer peripheral wall surfaces of the ten indicator plates 5 are respectively provided with an indicating convex piece 502 corresponding to the positions of the ten numbers (0 to 9) on the character wheel 3, so that the indicating convex pieces 502 of the ten indicator plates 5 correspond to the corresponding positions of the inlay 501 for the ten numbers 30 on the character wheel 3. A portion of each of the indicator plates 5 is provided in the groove 32 of each of the character wheels 3. The positions of the indicating convex pieces 502 of the ten indicator plates 5 are as follows: the indicating convex piece 502 of the first indicator plate 51 is The indicating convex piece 502 of the second indicating plate 52 corresponds to the position of the number (1) on the character wheel 3, the indicating convex piece 502 of the third indicating plate 53 corresponds to the position of the number (3) on the character wheel 3, the indicating convex piece 502 of the fourth indicating plate 54 corresponds to the position of the number (4) on the character wheel 3, the indicating convex piece 502 of the fifth indicating plate 55 corresponds to the position of the number (5) on the character wheel 3, the indicating convex piece 502 of the sixth indicating plate 56 corresponds to the position of the number (6) on the character wheel 3, the indicating convex piece 502 of the seventh indicating plate 57 corresponds to the position of the number (7) on the character wheel 3, and the indicating convex piece 502 of the eighth indicating plate 58 corresponds to the position of the number (8) on the character wheel 3. The indicating convex piece 502 of the ninth indicating plate 59 corresponds to the position of the number (8) on the character wheel 3, the indicating convex piece 502 of the ninth indicating plate 59 corresponds to the position of the number (9) on the character wheel 3, and the indicating convex piece 502 of the tenth indicating plate 50 corresponds to the position of the number (0) on the character wheel 3; a spring 6 is arranged in the accommodating groove 10 of the lock seat 1 and is sleeved on the second convex body 17 of the lock seat 1; a lock bolt 7 is passed through the number-changing gear body 22 and the number character wheel group, and a push block 70 is convexly provided on the lock bolt 7, and a limiting convex strip 71 is provided on one side of the push block 70, and a number cutting groove 72 is provided on the limiting convex strip 71; an upper cover 8 is arranged on the lock seat 1, and the top surface of the upper cover 8 is provided with a There is a slide groove 80 for the push block 70 of the lock bolt 7 to pass through, and the top surface of the upper cover 8 is provided with a through hole 81 corresponding to the position of each wheel 3 of the number wheel group. Corresponding marks 82 are provided between each of the through holes 81 on the top surface of the upper cover 8. One end surface of the upper cover 8 is provided with a through hole 83. The through hole 83 of the upper cover 8 is provided for the convex body 210 of the number change knob 21 to pass through, and an arc groove 84 is provided on the inner wall surface of the upper cover 8. The arc groove 84 is provided for the limiting boss 212 of the number change knob 21 to be set into, and the inner wall surface of the upper cover 8 is provided with a positioning inlay 85 corresponding to the positioning groove 18 position of the lock seat 1, and the upper cover 8 is provided with a lock number 86. Thus, it is a memory number lock structure.

[0042] When assembling the embodiment of the present invention, please refer to Figures 1 to 8As shown, each memory combination lock has a lock number 86 on the upper cover 8, and each lock number 86 has an "internal code". The "internal code" is set by the manufacturer during assembly. Three or four indicator plates 5 and lock bushings 4 can be selected. In this embodiment, four indicator plates 5 and lock bushings 4 are used. The four indicator plates 5 selected and the four lock bushings 4 are the "internal code" of the lock. The positions of the indicator tabs 502 on the four indicator plates 5 can be different or the same. For example, as in this embodiment, Figure 1 、 Figure 2 As shown, select Figure 3 The third indicator plate 53, the fifth indicator plate 55, the first indicator plate 51 and the seventh indicator plate 57 in the combination lock are shown in FIG. 5. The corresponding positions of the indicator protrusions 502 of the four indicator plates 5 and the corresponding grooves 45 of the lock bushings 4 are the "inner codes" of the lock ("3, 5, 1, 7" from left to right). The four lock bushings 4 are respectively assembled in the four character wheels 3, and the notches 44 of each lock bushing 4 correspond to the topmost number 30 on each character wheel 3 (the password number set in this embodiment is at the position of "0", and the number on the character wheel 3 is the "outer code", and the outer code in this embodiment is "0, 0, 0, 0", which is the "unlocking code" of the combination lock). The small-diameter wall surface 41 of each lock bushing 4 extends through the through hole 33 of each character wheel 3, and the positioning protrusion 47 on each lock bushing 4 is embedded in the positioning slot 31 of each character wheel 3 (as shown in FIG. Figure 6 、 Figure 8As shown), four indicator plates 5 (third indicator plate 53, fifth indicator plate 55, first indicator plate 51 and seventh indicator plate 57) are respectively arranged on one side of the four character wheels 3, and the small diameter wall surface 41 of each lock bushing 4 extends through the through hole 500 of each indicator plate 5, and the inlay 501 of each indicator plate 5 is respectively embedded in the corresponding groove 45 of each lock bushing 4, and then the number change gear body 22 is arranged in front of the lock bushing 4 at the far left end, and the lock bolt 7 is inserted through the through hole of the number change gear body 22. 220 extends into the large diameter through-hole 42 and the small diameter through-hole 43 of each lock bushing 4, and the limiting ridge 71 on the lock bolt 7 corresponds to the notch 44 of each lock bushing 4. Another end of the spring 6 is placed against the lock bushing 4 at the right end, and then the lock bolt 7, the number shift body 22 and the number wheel assembly and the spring 6 are placed together in the receiving groove 10 of the lock seat 1, and the other end of the spring 6 is set on the second convex body 17 of the lock seat 1, and the left end of the lock bolt 7 is passed through the lock seat 1, the push block 70 of the lock bolt 7 protrudes from the slot 16 of the lock base 1, and the right end of the lock bolt 7 is inserted into the second through-hole 170 of the lock base 1. The two guide protrusions 221 of the number-changing block 22 are respectively inserted into the two insertion slots 15 of the lock base 1, and the lower ends of the character wheels 3 are respectively located in the respective limit slots 110 of the lock base 1. The number-changing knob 21 is set in the groove 12 of the lock base 1, and the two guide protrusions 221 of the number-changing gear body 22 are respectively located in the number-changing knob 2 1, and then the upper cover 8 is placed on the lock base 1, so that the positioning inlay 85 of the upper cover 8 is embedded in the positioning inlay 18 of the lock base 1, and the protrusion 210 of the number change knob 21 corresponds to the through-hole 83 of the upper cover 8, the limiting boss 212 of the number change knob 21 is located in the arc groove 84 of the upper cover 8, and the push block 70 of the lock bolt 7 protrudes from the slide groove 80 of the upper cover 8. The upper end of each character wheel 3 protrudes from the through-hole 81 of the upper cover 8. In this way, the overall assembly can be completed.

[0043] When using this invention, please refer to Figures 4 to 10 As shown, the combination lock assembly of the present invention is set on the object to be locked, such as a door lock, a bicycle lock, a suitcase, a safe, etc. When locking, only the push block 70 of the lock bolt 7 is moved (as shown in FIG. Figure 9 As shown), one end of the lock bolt 7 protrudes out of the second through hole 170 of the lock base 1, and the limiting ridge 71 of the lock bolt 7 is separated from the notch 44 of each lock bushing 4 and is no longer restricted by each lock bushing 4, then the character wheels 3 can be rotated to produce random numbers, and each character wheel 3 drives the lock bushing 4 to rotate, and the lock bushing 4 and the indicator plate 5 rotate together, so that the notch 44 of each lock bushing 4 rotates (as shown). Figure 10When the lock is unlocked, the number 30 on each wheel 3 is the password set for the lock (the unlocking password in this embodiment is "0, 0, 0, 0"), and the notches 44 of the lock bushings 4 are aligned with each other again, and the notches 44 are aligned with the limiting ridges 71 of the lock bolt 7. The lock bolt 7 is no longer restricted by the lock bushing 4 and can be axially retracted to form an unlocked state (as shown in the figure). Figure 6 In this way, the unlocking action can be completed.

[0044] To change the password, please refer to Figure 11 、 Figure 12 As shown, it is only necessary to insert a tool into the groove 211 on the convex body 210 of the number change knob 21 and rotate the number change knob 21. The limiting protrusion 212 on the number change knob 21 is rotated in the arc groove 84 of the upper cover 8, and the arc surface 222 of the two guide protrusions 221 of the number change gear body 22 is pushed to the right along the arc section 214 of the number change knob 21 by the rotation of the number change knob 21. The number change gear body 22 pushes each lock bushing 4 to move to the right together, and pushes the spring 6 to be in an elastically compressed state, and the positioning protrusion 47 of each lock bushing 4 is disengaged from the positioning slot 31 of each character wheel 3 (as shown in FIG. Figure 12 As shown), each character wheel 3 is no longer restricted by the lock bolt 7 and the lock bushing 4 and can be rotated, so that the password of the lock can be freely set. When each character wheel 3 is rotated to the password to be set, the number change knob 21 is turned back to its original position with a tool, so that the number change gear body 22 is no longer blocked by the arc section 214 of the number change knob 21, and the spring 6 is elastically restored (as shown). Figure 5 As shown), each lock bushing 4 and the number-changing gear body 22 are axially pushed back to their original positions. The positioning protrusions 47 of each lock bushing 4 are again clamped in the positioning slots 31 of each character wheel 3, and the guide protrusions 221 of the number-changing gear body 22 are again located in the guide grooves 213 of the number-changing knob 21. In this way, the number-changing setting of the memory number lock can be completed.

[0045] Each memory combination lock of the present invention is provided with an "internal code". The user can save or record the "internal code" for future use. Consumers can also log in their personal information and the lock number 86 online. If they forget their password, they can call the manufacturer or log in online to check the "internal code" of the memory combination lock. Even if the user changes the password, as long as they remember the "internal code", they can easily retrieve the original password without having to ask a professional to open the lock or destroy the lock. This can achieve the purpose of convenient unlocking and protection of the combination lock. If the user forgets the password and wants to retrieve the password of the lock, please refer to Figures 13 to 19As shown, it is only necessary to rotate the wheel 3 of the memory combination lock so that the wheel 3 drives the lock bushing 4 and the indicator plate 5 to rotate, and turn the indicator protrusion 502 of each indicator plate 5 corresponding to each wheel 3 to the top (as shown in FIG. Figure 13 、 Figure 14 、 Figure 15 As shown in FIG5 , each indicating protrusion 502 is aligned with the corresponding mark 82 of the upper cover 8. At this time, the number 30 on each character wheel 3 is not the set password. Since each lock bushing 4 is provided with a pseudo corresponding groove 46, the thief does not know whether he has found the corresponding groove 45 on the lock bushing 4 or the pseudo corresponding groove 46. Therefore, he still cannot know which position the notch 44 of the lock bushing 4 corresponds to. In this way, the user only needs to obtain the "inner code" of the memory combination lock, align the indicating protrusions 502 of each indicating plate 53, 55, 51, 57 with each other, and then rotate each character wheel 3 to the corresponding position in sequence according to the "inner code" of the memory combination lock to retrieve the password. For example, if the "inner code" of the memory combination lock is "3, 5, 1, 7", then turn the leftmost character wheel 3 downward (clockwise) three times (as shown in FIG5 ). Figure 15 、 Figure 16 As shown), the notch 44 of the lock bushing 4 can be rotated to align with the position of the limiting ridge 71 of the lock bolt 7, and the second character wheel 3 on the left is turned down five times (as shown). Figure 17 As shown), turn the third character wheel 3 on the left downwards (as shown Figure 18 As shown) and turn the rightmost character wheel 3 downward seven times (as shown) Figure 19As shown), the notches 44 of each lock bushing 4 can be aligned with each other to achieve the purpose of retrieving the unlocking code. The reverse dial can also be used to dial the leftmost character wheel 3 upward (counterclockwise) seven times, and so on, the second character wheel 3 on the left is dialed upward five times, the third character wheel 3 on the left is dialed upward nine times, and the rightmost character wheel 3 is dialed upward three times. By turning each character wheel 3 upward to the corresponding number of times, the notches 44 of each lock bushing 4 can be aligned. Alternatively, the corresponding number 30 on the character wheel 3 after alignment of each indicator plate 5 and the corresponding "inner code" can be summed to take the units digit. In this way, the correct unlocking code is obtained. For example, the number 30 on the character wheel 3 is (3), the inner code is (7), and the sum is "10". Take its units digit, and the positive number of the character wheel 3 If the correct password is "0", turn the number 30 of the character wheel 3 to (0), or if the number 30 on the character wheel 3 is (8), the internal code is (7), and the sum is "15", take the units digit, and the correct password of the character wheel 3 is "5". Turn the number 30 of the character wheel 3 to (5) to retrieve the original set password, and so on. In this way, thieves cannot guess the "internal code" of the memory code lock, and can effectively prevent thieves from completing the unlocking by peeking at the position of the corresponding groove 45 of the lock buckle bushing 4. With the memory code lock structure of the present invention, thieves cannot know whether the cut groove on the lock buckle bushing 4 they peeped at is the correct corresponding groove 45 or the false corresponding groove 46. Unless they obtain the "internal code" of the memory code lock, it is difficult to guess the unlocking password, which has the effect of truly preventing peeking to unlock and retrieve the password.

[0046] In summary, the present invention has indeed achieved the intended purpose and efficacy, and is more ideal and practical than the prior art. The above-mentioned embodiments are only specific descriptions of the preferred embodiments of the present invention, and the embodiments are not intended to limit the scope of protection of the patent of the present invention. For example, all other equivalent changes and modifications that are achieved without departing from the technical means disclosed by the present invention should be included in the scope of protection covered by the present invention.

Claims

1. A memory combination lock, characterized in that: Includes: A lock base, the lock base having a receiving groove, a groove formed at one end of the lock base, a first protrusion formed in the receiving groove of the lock base at a position corresponding to the groove, a first through-hole and two insertion grooves formed on an inner wall of the groove, the first through-hole and the two insertion grooves being connected to the receiving groove, a notch formed on the lock base being connected to the first through-hole, a second protrusion formed inwardly at a position corresponding to the first protrusion in the receiving groove of the lock base, a second through-hole formed in the second protrusion, and a notch formed on the second through-hole; A number-changing knob is disposed in the groove of the lock base. A protrusion is provided on the outer end surface of the number-changing knob, and a notch is provided on the protrusion. A limiting boss is also provided on the outer end surface of the number-changing knob. Two guide grooves are provided on the other end of the number-changing knob. One side of the two guide grooves is configured as an arc section. A number-changing body is sleeved on the first protrusion of the lock base, the number-changing body is provided with a through hole, and one end of the number-changing body is provided with two guide protrusions facing each other, the two guide protrusions are respectively inserted into the two insertion grooves of the lock base and located in the two guide grooves of the number-changing knob, the opposite side edges of the two guide protrusions are configured as arc surfaces, and a positioning groove is provided on the wall surface of the number-changing body, wherein one of the positioning grooves is aligned with the groove of the lock base; A number wheel set is provided in the receiving groove of the lock seat. The number wheel set is composed of several wheels, several lock bushings and several indicator plates. Ten numbers are arranged on the outer wall of each wheel. One end of the inner wall of each wheel is provided with several positioning slots. The other end of each wheel is provided with a groove. A through hole is provided in the middle of each wheel. Each lock bushing is respectively provided in each wheel. The outer wall of the lock bushing is provided with a large diameter wall surface and a small diameter wall surface. The small diameter wall surface is provided through the through hole of the wheel. A large diameter through hole and a small diameter through hole are provided in the lock bushing. A notch is provided on the small diameter through hole. The outer wall of the lock bushing corresponds to A corresponding groove is provided at the position of the notch, and a plurality of positioning protrusions are provided on the outer wall surface of the lock bushing for being locked in the positioning groove of the character wheel. Each indicator plate is respectively provided on one side of each character wheel. There are ten types of indicator plates, each of which has a through hole in the middle, and an inlay is protruded in the through hole of each indicator plate. The inlay of the indicator plate is for being locked in the corresponding groove of the lock bushing. An indicating protrusion is provided on the outer peripheral wall surface of the ten types of indicator plates, respectively, corresponding to the positions of the ten numerals on the character wheel, so that the indicating protrusions of the ten types of indicator plates correspond to the corresponding positions of the inlays for the ten numerals on the character wheel, and a portion of each indicator plate is provided in the groove of each character wheel; a spring sleeved on the second protrusion of the lock base; A lock bolt is inserted into the number-changing gear body and the number wheel assembly, and a push block is protruded from the lock bolt. A limiting convex strip is provided on one side of the push block, and a plurality of grooves are provided on the limiting convex strip; An upper cover is provided on the lock base, and a sliding groove is provided on the top surface of the upper cover for the push block of the lock bolt to pass through. A through hole is provided on the top surface of the upper cover corresponding to the position of each wheel of the number wheel group. A through hole is provided on one end surface of the upper cover, and the through hole of the upper cover is for the convex body of the number change knob to pass through. An arc groove is provided on the inner wall surface of the upper cover, and the arc groove is for the limiting convex column of the number change knob to be set in.

2. The memory combination lock according to claim 1, wherein: A plurality of protrusions are equidistantly arranged in the accommodating groove of the lock seat, and limiting grooves are formed between the protrusions.

3. The memory combination lock according to claim 1, wherein: A positioning groove is provided at the bottom of the lock seat, and a positioning inlay is provided on the inner wall surface of the upper cover corresponding to the position of the positioning groove of the lock seat.

4. The memory combination lock according to claim 1, wherein: The arrangement positions of the indicating convex pieces of the ten indicating plates are as follows: the indicating convex piece of the first indicating plate corresponds to the position of the number 1 on the character wheel; the indicating convex piece of the second indicating plate corresponds to the position of the number 2 on the character wheel; the indicating convex piece of the third indicating plate corresponds to the position of the number 3 on the character wheel; the indicating convex piece of the fourth indicating plate corresponds to the position of the number 4 on the character wheel; the indicating convex piece of the fifth indicating plate corresponds to the position of the number 5 on the character wheel; the indicating convex piece of the sixth indicating plate corresponds to the position of the number 6 on the character wheel; the indicating convex piece of the seventh indicating plate corresponds to the position of the number 7 on the character wheel; the indicating convex piece of the eighth indicating plate corresponds to the position of the number 8 on the character wheel; the indicating convex piece of the ninth indicating plate corresponds to the position of the number 9 on the character wheel; and the indicating convex piece of the tenth indicating plate corresponds to the position of the number 0 on the character wheel.

5. The memory combination lock according to claim 1, wherein: At least one pseudo corresponding groove is provided on the outer wall surface of the lock bushing.

6. The memory combination lock according to claim 1, wherein: Corresponding marks are provided between the through holes on the top surface of the upper cover.

7. The memory combination lock according to claim 1, wherein: The upper cover is provided with a lock number.

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