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 and a plurality of lock catch bushings. Each of the lock catch bushings is disposed within each number wheel. A large-diameter through-hole and a small-diameter through-hole are disposed within the lock catch bushing. A notch is disposed on the small-diameter through-hole. There are ten types of lock catch bushings. The outer walls of the ten types of lock catch bushings are each provided with a corresponding groove corresponding to the positions of the ten numbers (0-9) on the number wheel. In this way, each combination lock is formed by combining different lock catch bushings to form an internal code, and the original password set for the combination lock can be retrieved by means of 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 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 wheels and several lock bushings. The outer wall of each wheel is ringed with ten numbers (0 to 9). One end of the inner wall of each wheel is ringed with several positioning slots. The other end of each wheel is provided with a groove. The middle of each wheel is provided with a through hole. Each lock bushing is respectively arranged in each wheel. The outer wall of the lock bushing has a large diameter wall surface and a small diameter wall surface. The small diameter wall is penetrated by A large-diameter through-hole and a small-diameter through-hole are provided in the locking bushing in the through-hole of the character wheel. A notch is provided in the small-diameter through-hole. The locking bushing is manufactured in ten different types. A corresponding groove is provided on the outer wall surface of each of the ten types of locking bushings, corresponding to the positions of the ten numerals (0 to 9) on the character wheel, so that the notches and corresponding grooves of the ten types of locking bushings correspond to the positions of the ten numerals on the character wheel. A plurality of positioning protrusions are also provided on the small-diameter wall surface of the locking bushing for locking in the positioning grooves of the 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 number lock, wherein the corresponding grooves of the ten lock buckle bushings are respectively: the corresponding groove of the first lock buckle bushing corresponds to the position of the number (1) on the character wheel, the corresponding groove of the second lock buckle bushing corresponds to the position of the number (2) on the character wheel, the corresponding groove of the third lock buckle bushing corresponds to the position of the number (3) on the character wheel, the corresponding groove of the fourth lock buckle bushing corresponds to the position of the number (4) on the character wheel, the corresponding groove of the fifth lock buckle bushing corresponds to the position of the number (5) on the character wheel, the corresponding groove of the sixth lock buckle bushing corresponds to the position of the number (6) on the character wheel, the corresponding groove of the seventh lock buckle bushing corresponds to the position of the number (7) on the character wheel, the corresponding groove of the eighth lock buckle bushing corresponds to the position of the number (8) on the character wheel, the corresponding groove of the ninth lock buckle bushing corresponds to the position of the number (9) on the character wheel, and the corresponding groove of the tenth lock buckle bushing corresponds to the position of the number (0) on the character wheel.

[0016] In the memory combination lock of the present invention, the corresponding groove of the lock bushing is provided on the small diameter wall surface of the lock bushing.

[0017] In the memory combination lock of the present invention, the corresponding groove of the lock bushing is arranged on the large diameter wall surface of the lock bushing.

[0018] The memory combination lock of the present invention comprises a number wheel assembly comprising a plurality of number wheels, a plurality of lock bushings and a plurality of indicator plates, each indicator plate being respectively arranged on one side of each number wheel, a portion of each indicator plate being arranged in a groove of each number wheel, a through-hole being provided in the middle of each indicator plate, an inlay being protruding from the through-hole of each indicator plate, the inlay being provided to be embedded in a corresponding groove of the lock bushing, and an indicator tab being protruding from the outer peripheral wall surface of each indicator plate at a position corresponding to the inlay.

[0019] The memory combination lock of the present invention has corresponding marks between the through holes on the top surface of the upper cover.

[0020] The memory combination lock of the present invention has a lock number on the upper cover.

[0021] The memory combination lock of the present invention has the advantages of utilizing the different corresponding positions of the notches and corresponding grooves of ten types of lock buckle bushings so that each combination lock is provided with an internal code. Even if a thief peeks into the corresponding groove on the lock buckle bushing inside the combination lock, he or she still cannot guess the position of the notch and cannot 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

[0022] Figure 1 Shown is a perspective exploded view of an embodiment of the present invention.

[0023] Figure 2 Shown is a three-dimensional exploded view from another angle of an embodiment of the present invention.

[0024] Figure 3 Shown is a three-dimensional view of a locking bushing according to an embodiment of the present invention.

[0025] Figure 4 Shown is a three-dimensional view of another locking bushing according to an embodiment of the present invention.

[0026] Figure 5 Shown is a three-dimensional combination diagram of an embodiment of the present invention.

[0027] Figure 6 Shown is a combined cross-sectional view of an embodiment of the present invention.

[0028] Figure 7 Shown is a schematic cross-sectional view of an embodiment of the present invention from above.

[0029] Figure 8 Shown Figure 7 Schematic diagram of the cross section along the AA line.

[0030] Figure 9 Shown Figure 7 Schematic diagram of the cross section of the BB section line.

[0031] Figure 10 FIG. 1 is a schematic diagram of pushing a lock bolt according to an embodiment of the present invention.

[0032] Figure 11 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.

[0033] Figure 12 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.

[0034] Figure 13FIG2 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.

[0035] Figure 14 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.

[0036] Figure 15 It is a cross-sectional schematic diagram showing each indicator plate aligned upward in an embodiment of the present invention.

[0037] Figure 16 Shown Figure 14 Schematic diagram of the combined cross-section of the seventh locking bushing.

[0038] Figure 17 Shown Figure 16 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.

[0039] Figure 18 Shown Figure 14 A schematic diagram of the combined cross-section of the fifth locking bushing.

[0040] Figure 19 Shown Figure 14 Schematic diagram of the combined cross-section of the ninth locking bushing.

[0041] Figure 20 Shown Figure 14 A schematic diagram of the combined cross-section of the third locking bushing.

[0042] 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; 400 large diameter wall; 401 small diameter wall; 402 large diameter through-hole; 403 small diameter through-hole; 404 notch ; 405 corresponding groove; 406 positioning protrusion; 41, 41' first lock bushing; 42, 42' second lock bushing; 43, 43' third lock bushing; 44, 44' fourth lock bushing; 45, 45' fifth lock bushing; 46, 46' sixth lock bushing; 47, 47' seventh lock bushing; 48, 48' eighth lock bushing; 49, 49' ninth lock bushing; 40, 40' tenth lock bushing; 5 indicator plate; 50 perforation; 51 inlay; 52 indicator protrusion; 6 spring; 7 locking bolt; 70 push block; 71 limiting protrusion; 72 cutting groove; 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

[0043] 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:

[0044] For an embodiment of the present invention, please refer to Figures 1 to 4As shown, the memory number 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 limited 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 at a position corresponding to the groove 12 in the receiving groove 10 of the lock base 1, and a first through-hole 14 and two insertion grooves 15 are provided on the inner wall surface of the groove 12, the first through-hole 14 and the two insertion grooves 15 are connected to the receiving groove 10, and a groove 16 is provided on the lock base 1 to connect to the first through-hole 14, and the other end of the receiving groove 10 of the lock base 1 corresponds to the first convex body 1 3 is provided with a second convex body 17 inwardly, a second through-hole 170 is provided in the second convex body 17, a notch 171 is provided on the second through-hole 170, and a positioning groove 18 is provided at the bottom of the lock seat 1; a number-changing knob 21 is provided in the groove 12 of the lock seat 1, a convex body 210 is provided on the outer end surface of the number-changing knob 21, a groove 211 is provided on the convex body 210, and a limiting boss 212 is 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 provided as an arc section 214; a number-changing gear body 22 is provided in the accommodating groove 10 of the lock seat 1 and is sleeved on On the first convex body 13, the number change gear body 22 is provided with a through hole 220, and one end of the number change gear body 22 is relatively convexly provided with two guide protrusions 221, and the two guide protrusions 221 are respectively inserted into the two insertion grooves 15 of the lock seat 1 and provided in the two guide grooves 213 of the number change knob 21. The opposite side of the two guide protrusions 221 is set as an arc surface 222, and a positioning groove 223 is relatively provided on the wall surface of the number change gear body 22, one of which is aligned with the groove 16 of the lock seat 1; a number character wheel group is provided in the accommodating groove 10 of the lock seat 1, and the number character wheel group is composed of several character wheels 3, several lock bushings 4 and several indicator plates 5. , the outer wall surface of each character wheel 3 is ringed with ten numbers (0-9) 30, one end of the inner wall surface 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, and each locking bushing 4 is respectively arranged in each character wheel 3, the outer wall surface of the locking bushing 4 is provided with a large diameter wall surface 400 and a small diameter wall surface 401, the small diameter wall surface 401 is passed through the through hole 33 of the character wheel 3, the locking bushing 4 is provided with a large diameter through hole 402 and a small diameter through hole 403, and a notch 404 is provided on the small diameter through hole 403. The locking bushing 4 can be made into ten types (such as Figure 3 As shown), the small diameter wall surface 401 of the ten kinds of lock bushings 4 is provided with a corresponding groove 405 corresponding to the positions of the ten numbers 30 (0 to 9) on the character wheel 3, so that the notches 404 on the ten kinds of lock bushings 4 and the corresponding grooves 405 are the corresponding positions of the ten numbers 30 on the character wheel 3 (as shown). Figure 3 、 Figure 4 As shown in FIG. 1 , a plurality of positioning protrusions 406 are relatively provided on the small diameter wall surface 401 of the locking bushing 4 for being clamped in the positioning clamping groove 31 of the character wheel 3. The corresponding grooves 405 of the ten locking bushings 4 are respectively: the corresponding groove 405 of the first locking bushing 41 corresponds to the position of the number (1) on the character wheel 3, the corresponding groove 405 of the second locking bushing 42 corresponds to the position of the number (2) on the character wheel 3, the corresponding groove 405 of the third locking bushing 43 corresponds to the position of the number (3) on the character wheel 3, the corresponding groove 405 of the fourth locking bushing 44 corresponds to the position of the number (4) on the character wheel 3, and the corresponding groove 405 of the fifth locking bushing 45 corresponds to the position of the number (6) on the character wheel 3. The corresponding groove 405 of the sixth locking bushing 46 corresponds to the position of the number (5) on the character wheel 3, the corresponding groove 405 of the seventh locking bushing 47 corresponds to the position of the number (7) on the character wheel 3, the corresponding groove 405 of the eighth locking bushing 48 corresponds to the position of the number (8) on the character wheel 3, the corresponding groove 405 of the ninth locking bushing 49 corresponds to the position of the number (9) on the character wheel 3, and the corresponding groove 405 of the tenth locking bushing 40 corresponds to the position of the number (0) on the character wheel 3. The corresponding groove 405 of the locking bushing 4 can also be provided on the large diameter wall surface 400 of the locking bushing 4' (such as Figure 4 As shown, another embodiment of the locking bushing is shown), as Figure 3As shown in the manner, the corresponding groove 405 of the first locking bushing 41' corresponds to the position of the number (1) on the character wheel 3, the corresponding groove 405 of the second locking bushing 42' corresponds to the position of the number (2) on the character wheel 3, the corresponding groove 405 of the third locking bushing 43' corresponds to the position of the number (3) on the character wheel 3, the corresponding groove 405 of the fourth locking bushing 44' corresponds to the position of the number (4) on the character wheel 3, the corresponding groove 405 of the fifth locking bushing 45' corresponds to the position of the number (5) on the character wheel 3, the corresponding groove 405 of the sixth locking bushing 46' corresponds to the position of the number (6) on the character wheel 3, The corresponding groove 405 of the seventh locking bushing 47' corresponds to the position of the number (7) on the character wheel 3, the corresponding groove 405 of the eighth locking bushing 48' corresponds to the position of the number (8) on the character wheel 3, the corresponding groove 405 of the ninth locking bushing 49' corresponds to the position of the number (9) on the character wheel 3, and the corresponding groove 405 of the tenth locking bushing 40' corresponds to the position of the number (0) on the character wheel 3, and each of the indicator plates 5 is respectively arranged on one side of each character wheel 3, a part of each of the indicator plates 5 is arranged in the groove 32 of each of the character wheels 3, and a through hole 50 is provided in the middle of each of the indicator plates 5, and a convex protrusion is provided in the through hole 50 of each of the indicator plates 5. There is an inlay 51, which is embedded in the corresponding groove 405 of each lock bushing 4, and an indicating convex piece 52 is convexly provided on the outer peripheral wall surface of each indicator plate 5 corresponding to the position of the inlay 51; a spring 6 is provided 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 shift body 22 and the number word 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 provided on the lock seat 1, and the top surface of the upper cover 8 is provided with a push block 70 for the lock bolt 7 to pass through A slide groove 80 is provided, and the top surface of the upper cover 8 corresponds to the position of each wheel 3 of the number wheel group and is provided with a through hole 81. A corresponding mark 82 is 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. 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 inserted. The inner wall surface of the upper cover 8 corresponds to the position of the positioning groove 18 of the lock seat 1 with a positioning inlay 85. The upper cover 8 is provided with a lock number 86. In this way, it is a memory number lock structure.

[0045] When assembling the embodiment of the present invention, please refer to Figures 1 to 9As 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 lock bushings 4 can be selected. In this embodiment, four lock bushings 4 are selected. The four selected lock bushings 4 are the "internal code" of the lock, and the corresponding slots 405 on the four selected lock bushings 4 can be different or the same. For example: Figure 1 、 Figure 2 As shown, it is selected Figure 3 The seventh lock bushing 47, the fifth lock bushing 45, the ninth lock bushing 49 and the third lock bushing 43 in the combination lock are arranged. The corresponding grooves 405 positions of the four lock bushings 4 are the "inner codes" of the lock (from left to right they are "7, 5, 9, 3" respectively). The four lock bushings 4 are respectively arranged in the four character wheels 3, and the notches 404 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". The outer code of this embodiment is "0, 0, 0, 0", which is the "unlocking code" of the combination lock), and the small-diameter wall surface 401 of each lock bushing 4 extends through the through hole 33 of each character wheel 3, and the positioning protrusion 406 on each lock bushing 4 is embedded in the positioning slot 31 of each character wheel 3 (as shown in FIG. Figure 7 、 Figure 9 As shown), four indicator plates 5 are respectively arranged on one side of the four character wheels 3, and the small diameter wall surface 401 of the lock bushing 4 extends through the through hole 50 of the indicator plate 5, and the inlay 51 of each indicator plate 5 is embedded in the corresponding groove 405 of each lock bushing 4. (If Figure 4In another embodiment, the lock bushing 4' is assembled. Each indicator plate 5 is assembled on the other side of each character wheel 3, and the large diameter wall surface 400 of the lock bushing 4' extends through the through hole 50 of the indicator plate 5, and the inlay 51 of each indicator plate 5 is embedded in the corresponding groove 405 of each lock bushing 4'. Then, the number change body 22 is set in front of the lock bushing 4 at the leftmost end, and the lock bolt 7 is extended from the through hole 220 of the number change body 22 into the large diameter through hole 402 of each lock bushing 4. And the small diameter through-hole 403, the limiting ridge 71 on the lock bolt 7 corresponds to the notch 404 of each lock bushing 4, and one end of the spring 6 is placed on 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 set together in the accommodating groove 10 of the lock base 1, and the other end of the spring 6 is set on the second convex body 17 of the lock base 1, and the left end of the lock bolt 7 is passed through the first through-hole 14 of the lock base 1, and the lock bolt The push block 70 of 7 protrudes from the slot 16 of the lock seat 1, and the right end of the lock bolt 7 is inserted into the second through-hole 170 of the lock seat 1. The two guide protrusions 221 of the number change block 22 are respectively inserted into the two insertion slots 15 of the lock seat 1, and the lower ends of the character wheels 3 are respectively located in the respective limit slots 110 of the lock seat 1. The number change knob 21 is also provided in the groove 12 of the lock seat 1, and the two guide protrusions 221 of the number change body 22 are respectively located in the guide slots of the number change knob 21. 213, 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 groove 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, and 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.

[0046] When using this invention, please refer to Figures 5 to 11 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 10 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 404 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 404 of each lock bushing 4 rotates (as shown). Figure 11When 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 404 of the lock bushings 4 are aligned with each other again, and the notches 404 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.

[0047] To change the password, please refer to Figure 12 、 Figure 13 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, rotate the number change knob 21, and the limiting protrusion 212 on the number change knob 21 is rotated in the arc groove 84 of the upper cover 8. 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, and 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 406 of each lock bushing 4 is disengaged from the positioning slot 31 of each character wheel 3 (as shown in FIG. Figure 13 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 6 As shown), each lock bushing 4 and the number-changing gear body 22 are axially pushed back to their original positions. The positioning protrusions 406 of each lock bushing 4 are again locked 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.

[0048] 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, they can retrieve the original password by remembering the "internal code". There is no need to ask a professional to open the lock or destroy the lock, which 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 14 to 20As shown, it is only necessary to rotate the wheel 3 of the memory combination lock, so that the wheel 3 drives the lock bushings 47, 45, 49, 43 to rotate, and the indicator plates 5 to rotate, and the indicator protrusions 52 of the indicator plates 5 corresponding to the wheel 3 are turned to the top (as shown in FIG. Figure 14 、 Figure 15 、 Figure 16 As shown), align each indicator protrusion 52 with the corresponding mark 82 on the upper cover 8. At this time, the number 30 on each character wheel 3 is not the set password. Because the corresponding positions of the notches 404 of each lock bushing 4 and the corresponding grooves 405 are different, even if the thief finds the corresponding groove 405 of the lock bushing 4, he still cannot know which position the notch 404 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 indicator protrusions 52 of each indicator plate 5 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 "7, 5, 9, 3", then turn the leftmost character wheel 3 upward (counterclockwise) seven times (as shown). Figure 16 、 Figure 17 As shown), the notch 404 of the lock bushing 47 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 upward five times (as shown). Figure 18 As shown), turn the third character wheel 3 on the left upward nine times (as shown Figure 19 As shown) and turn the rightmost character wheel 3 upward three times (as shown) Figure 20As shown), the notches 404 of the lock bushings 47, 45, 49, and 43 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 downward (clockwise) three times, and so on, the second character wheel 3 on the left is dialed down five times, the third character wheel 3 on the left is dialed down once, and the rightmost character wheel 3 is dialed down seven times. By turning each character wheel 3 downward to the corresponding number of times, the notches 404 of the lock bushings 47, 45, 49, and 43 can be aligned. Alternatively, the corresponding number 30 on the character wheel 3 after alignment of each indicator plate 5 and the sum of the corresponding "inner code" can be taken to obtain the correct unlocking code. For example, the number 30 on the character wheel 3 is (3), the inner code is (7), and the sum is " 10", take its unit digit, the correct password of the wheel 3 is "0", and the number 30 of the wheel 3 is turned to (0), or the number 30 on the wheel 3 is (8), the internal code is (7), and the sum is "15", take its unit digit, the correct password of the wheel 3 is "5", and the number 30 of the wheel 3 is turned to (5), and the original set password can be retrieved, and so on. In this way, the thief cannot guess the "internal code" of the memory code lock, and the thief can be prevented from completing the unlocking by peeping the corresponding groove 405 position of the lock buckle bushing 4. The memory code lock structure of the present invention has the effect of truly preventing peeping to unlock and retrieve the password, even if the thief peeks into the corresponding groove 405 of the lock buckle bushing 4.

[0049] 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 arranged in the receiving groove of the lock seat. The number wheel set is composed of several wheels and several lock bushings. Ten numbers are arranged on the outer wall of each wheel. One end of the inner wall of each wheel is arranged 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 arranged in each wheel. The outer wall of the lock bushing has a large diameter wall and a small diameter wall. The small diameter wall is penetrated by A large-diameter through-hole and a small-diameter through-hole are provided in the locking bushing in the through-hole of the character wheel. A notch is provided in the small-diameter through-hole. The locking bushing is manufactured in ten different types. A corresponding groove is provided on the outer wall surface of each of the ten types of locking bushings, corresponding to the positions of the ten numerals on the character wheel. The notches and corresponding grooves of the ten types of locking bushings correspond to the positions of the ten numerals on the character wheel. The small-diameter wall surface of the locking bushing is also provided with a plurality of positioning protrusions for locking in the positioning grooves of the 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 receiving 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 corresponding grooves of the ten types of locking bushings are: the corresponding groove of the first locking bushing corresponds to the position of number 1 on the character wheel, the corresponding groove of the second locking bushing corresponds to the position of number 2 on the character wheel, the corresponding groove of the third locking bushing corresponds to the position of number 3 on the character wheel, the corresponding groove of the fourth locking bushing corresponds to the position of number 4 on the character wheel, the corresponding groove of the fifth locking bushing corresponds to the position of number 5 on the character wheel, the corresponding groove of the sixth locking bushing corresponds to the position of number 6 on the character wheel, the corresponding groove of the seventh locking bushing corresponds to the position of number 7 on the character wheel, the corresponding groove of the eighth locking bushing corresponds to the position of number 8 on the character wheel, the corresponding groove of the ninth locking bushing corresponds to the position of number 9 on the character wheel, and the corresponding groove of the tenth locking bushing corresponds to the position of number 0 on the character wheel.

5. The memory combination lock according to claim 1, wherein: The corresponding groove of the locking bushing is arranged on the small diameter wall surface of the locking bushing.

6. The memory combination lock according to claim 1, wherein: The corresponding groove of the locking bushing is arranged on the large diameter wall surface of the locking bushing.

7. The memory combination lock according to claim 1, wherein: The number wheel assembly is composed of several number wheels, several locking bushings and several indicator plates. Each indicator plate is respectively arranged on one side of each number wheel, and a portion of each indicator plate is arranged in the groove of each number wheel. A through hole is provided in the middle of each indicator plate, and an inlay is protruded in the through hole of each indicator plate. The inlay is provided to be embedded in the corresponding groove of the locking bushing. An indicator convex piece is protruded on the outer peripheral wall surface of each indicator plate at the position corresponding to the inlay.

8. 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.

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

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