Memory combination lock

Abstract

A memory combination lock, comprising: a locking seat (1) provided with a receiving container (10), wherein an end portion of the locking seat (1) is provided with a recess (12), wherein a first projection (13) is arranged at the position corresponding to the recess (12) in the receiving container (10) of the locking seat (1), wherein the inner wall of the recess (12) is provided with a first through-bore (14) and two plug-in grooves (15), wherein the first through-bore (14) and the two plug-in grooves (15) are continuously connected to the receiving container (10), wherein the locking seat (1) is provided with a slot (16) continuously connected to the first through-bore (14), wherein a second projection (17) which is arranged at a position opposite to the first projection (13) in the receiving container (10) of the locking seat (1),wherein a second through-hole (170) is provided in the second projection (17) and the second through-hole (170) is provided with a notch (171); , a number change button (21) arranged in the recess (12) of the locking seat (1), wherein an outer end surface of the number change button (21) is provided with a projection (210), wherein the projection (210) is provided with a slot (211), wherein the outer end surface of the number change button (21) is further provided with a limiting rod (212), wherein an end portion of the number change button (21) is provided with two guide slots (213), and wherein one side of the two guide slots (213) is each formed as an arc portion (214); a number change stop (22) which is plugged onto the first projection (13) of the locking seat (1) and provided with a through hole (220), wherein an end portion of the number change stop (22) is provided with two guide tabs (221), wherein the two guide tabs (221) are each inserted into the two plug-in grooves (15) of the locking seat (1) and arranged in the two guide slots (213) of the number change button (21), wherein the side opposite the two guide tabs (221) is designed as a curved surface (222) and a positioning slot (223) is provided on the wall of the number change stop (22) and is aligned with the slot (16) of the locking seat (1); a number wheel set arranged in the receiving container (10) of the locking seat (1) and consisting of a plurality of number wheels (3) and a plurality of locking sleeves (4), wherein the outer wall of each number wheel (3) is provided annularly with ten digits (30) from zero to nine, wherein a plurality of positioning engagement recesses (31) are provided annularly at one end portion of the inner wall of a respective number wheel (3), wherein a recess (32) is provided at the other end portion of a respective number wheel (3) and a through hole (33) is provided in the center of a respective number wheel (3), wherein a respective locking sleeve (4) is arranged in the corresponding number wheel (3), wherein the outer wall of a respective locking sleeve (4) has a large diameter wall (400) and a small diameter wall (401), wherein a respective small diameter wall (401) passes through the through hole (33) of the corresponding number wheel (3) is pushed through,wherein a large-diameter through-hole (402) and a small-diameter through-hole (403) are provided in the respective locking sleeve (4), wherein the respective small-diameter through-hole (403) is provided with a gap (404), wherein the locking sleeves (4) are manufactured in ten types and a corresponding groove (405) is provided at the positions of the outer walls of the ten locking sleeves (4) corresponding to the ten digits (30) zero to nine of the corresponding digit wheel (3), whereby the gaps (404) and the corresponding grooves (405) of the ten locking sleeves (4) represent the corresponding positions of the ten digits (30) of the digit wheels (3), wherein the small-diameter wall (401) of a respective locking sleeve (4) is further provided with a plurality of positioning projections (406) for engaging in the positioning engagement recesses (31) of the corresponding number wheel (3); , a spring (6) which is fitted onto the second projection (17) of the locking seat (1); a lock bolt (7) inserted into the number change stop (22) and the number wheel set and provided with a projecting sliding block (70), wherein a projecting limiting strip (71) is arranged on one side of the sliding block (70) of the lock bolt (7) and is provided with a plurality of slots (72); and a cover (8) covering the locking seat (1), the upper side of the cover (8) being provided with a sliding groove (80) through which the sliding block (70) of the lock bolt (7) is inserted, a through-opening (81) being provided at each of the positions of the upper side of the cover (8) corresponding to the number wheels (3) of the number wheel set, an end surface of the cover (8) being provided with a through-hole (83), the through-hole (83) of the cover (8) serving for the insertion of the projection (210) of the number change button (21), and an arcuate groove (84) being provided on the inner wall of the cover (8) and serving for the insertion of the limit rod (212) of the number change button (21).

Description

Field of the invention

[0001] The present invention relates to a memory combination lock and, more particularly, to a combination lock structure capable of retrieving the originally set unlock code. State of the art

[0002] A combination lock is a type of lock commonly used for door locks, bicycle locks, suitcases, safes, and other items. It allows the lock to be unlocked without a key, thus avoiding the problems caused by keyless unlocking and key loss in the prior art. However, the ordinary combination lock does not have a mechanism for the user to retrieve the correct code. If the user forgets the previously set code, they must try to figure it out by blindly guessing it or simply destroy the combination lock. However, this renders the lock unusable. Alternatively, the user can ask a professional locksmith to crack the lock code so that the lock can be used normally again.However, this method is not only time-consuming and labor-intensive, but the user also often has to pay additional fees, which causes problems in using it.

[0003] A conventional combination lock typically comprises a lock cylinder housing and a number wheel set. The number wheel set is arranged in the lock cylinder housing and consists of a lock bolt, several locking sleeves, and several number wheels. The locking sleeves are attached to the lock bolt and can limit the telescoping of the lock bolt. The through holes located in the center of the locking sleeves are provided with slots through which the protruding blocks of the lock bolt pass. The number wheels are attached to the locking sleeves and can be rotated together with the locking sleeves. By turning the number wheels, the locking sleeves can be rotated relative to the lock bolt.When the number wheels of the combination lock are rotated to the set code, the gaps of all the locking sleeves are aligned, thus eliminating the axial limitation between the locking sleeves and the lock bolt, allowing the protruding blocks of the lock bolt to pass through the gaps of the locking sleeves and slide axially within the locking sleeves, thus unlocking the lock bolt. However, to facilitate the assembly of the locking sleeves and the number wheels in the conventional number wheel set, a corresponding recess is provided on the outer wall of each locking sleeve as a mark to facilitate alignment and assembly. In the prior art, the gaps and recesses of the locking sleeves are arranged in the same position. Although conventional combination locks are convenient to manufacture and assemble, they are easily picked.The picking method is demonstrated in the online video (how to pick a realtor lock box: https: / / www.youtube.com / watch?v=JM44uRI3rLo). A thin, strip-shaped probing tool is inserted into the gap between the number wheels and the lock cylinder housing, causing the end of the probing tool to rest against the outer peripheral surfaces of the locking sleeves. The number wheels are then rotated to feel whether the probing tool continues to move forward. If the probing tool can continue to move forward, it can be concluded that this location is a recess in a locking sleeve. Then, this principle is followed one after the other to find the recess of the next locking sleeve. After the recesses of all locking sleeves have been aligned, the gaps of all locking sleeves are also aligned accordingly.Then, all the number wheels are rotated one after the other, driving the locking sleeves until the gaps of all the locking sleeves are aligned with the protruding blocks of the lock bolt. This allows the protruding blocks of the lock bolt to pass through the gaps of the locking sleeves and move axially within the gaps of all the locking sleeves, thus unlocking the lock bolt. The video is published online, making most combination locks easy to crack.

[0004] DE 10 2007 028 916 A1 discloses a lock with multiple selector devices, which includes reset selectors that can be rotated about a locking shaft. Each reset selector device must be in a specific angular position to allow a user to unlock the lock or reset the combination. Each reset selector device has a magnet. A master key contains sensors, each of which is connected to a signaling device. Each of the signaling devices indicates to a user that a corresponding magnet is adjacent to a corresponding sensor, thereby assisting a user in retrieving a lost combination. A rotary lock includes a selector device that rotates a driver cam, which in turn rotates several wheels to their unlocking positions. A magnet for each wheel is provided on the driver cam.Each magnet is connected to a sensor provided on a master key, which also includes signaling devices indicating that a corresponding magnet is adjacent to a corresponding sensor, thereby assisting the user in retrieving a lost combination.

[0005] CN 1 15 263 085 A relates to a password lock in the form of a character wheel lock. This is used to unlock a set of digital or symbol types using a password. A user only has to remember the password itself and requires no keys. The password lock has a double password. The lock comprises a password seat, a password shaft, a locking part, a character wheel assembly, a lock body, an actuating part, a lock shaft, and an elastic release piece. A password base body is arranged in the lock body and is equipped with several parallel character wheel grooves. Each character wheel groove is arranged internally with a group of character wheel assemblies. The encryption shaft is in sliding connection with the password base body and engages successively through all of the character wheel assemblies.A character wheel assembly includes a common bushing, a guide bushing, and a character wheel. The common bushing and the guide bushing are rotatably mounted on the password shaft in an axial direction, and a first unlocking groove and a second unlocking groove are formed in the outer side end surfaces of the common bushing and the guide bushing, respectively. The locking member is disposed on the outer wall of the password seat and is in communication with the password shaft. An operating member is disposed on the surface of the lock body and is relatively fixed to the password shaft. A lock shaft with an upper lock unlocking function penetrates the lock body and is restricted by the locking member. An unlocking elastic member is disposed in the lock body and acts on the lock shaft.

[0006] From DE 603 ​​04 113 T2 a door locking handle assembly with a built-in combination lock is known, wherein the assembly has a base body which is fixedly attached to a door of a box.A handle is pivoted toward said base body in such a way that said handle is pulled out forwards and pushed back relative to said base body and is further rotated sideways on a locking shaft after completion of its pulling out operation, wherein a locking element serving as a door latch for locking said door to a main body of said box is directly or indirectly connected to said handle in such a way that it can be engaged with and released from a receiving part of a stationary frame member, such as said main body of said box, when said handle is pulled out forwards and then rotated sideways on said locking shaft after completion of the pulling out operation of said handle.The combination lock provided with a plurality of marked dials is incorporated in said handle and constructed such that a locking plate is brought into its unlocked position when a plurality of marked dials are rotated a given number of times so as to form a predetermined combination of unlocking marks provided in the outer peripheral surfaces of said marked dials, while the locking plate is held in its locked position when said predetermined combination of unlocking marks is not formed. Object of the invention

[0007] The primary object of the present invention is to provide a memory combination lock that effectively eliminates the disadvantages of conventional combination locks in use. This object is achieved by a memory combination lock having the features of claim 1.

[0008] The memory combination lock according to the invention comprises the following: a locking seat provided with a receiving container, wherein an end portion of the locking seat is provided with a recess, wherein a first projection is arranged at the position corresponding to the recess in the receiving container of the locking seat, wherein the inner wall of the recess is provided with a first through-hole and two plug-in grooves, wherein the first through-hole and the two plug-in grooves are continuously connected to the receiving container, wherein the locking seat is provided with a slot continuously connected to the first through-hole, wherein a second projection is arranged at a position opposite to the first projection in the receiving container of the locking seat, wherein a second through-hole is provided in the second projection and the second through-hole is provided with a notch; a number change knob disposed in the recess of the locking seat, wherein an outer end surface of the number change knob is provided with a projection, the projection being provided with a slot, the outer end surface of the number change knob being further provided with a limiting rod, one end portion of the number change knob being provided with two guide slots, and one side of the two guide slots being each formed as an arc portion; a number change stopper fitted onto the first projection and provided with a through hole, wherein an end portion of the number change stopper is provided with two guide tabs, wherein the two guide tabs are each fitted into the two insertion grooves of the locking seat and arranged in the two guide slots of the number change knob, wherein the side opposite the two guide tabs is formed as a curved surface and a positioning slot is provided on the wall of the number change stopper and is aligned with the slot of the locking seat; a number wheel set arranged in the receiving container of the locking seat and consisting of a plurality of number wheels and a plurality of locking sleeves, the outer wall of each number wheel being ring-shaped with ten digits zero to nine is provided, wherein a plurality of positioning engagement recesses are provided in a ring shape at one end portion of the inner wall of a respective number wheel, wherein a recess is provided at the other end portion of a respective number wheel and a through hole is provided in the center of a respective number wheel, wherein a respective locking sleeve is arranged in the corresponding number wheel, wherein the outer wall of a respective locking sleeve has a large-diameter wall and a small-diameter wall, wherein a respective small-diameter wall is inserted through the through hole of the corresponding number wheel, wherein a large-diameter through hole and a small-diameter through hole are provided in the respective locking sleeve, wherein the respective small-diameter through hole is provided with a gap,wherein the locking sleeves are manufactured in ten types, and a corresponding groove is provided at the positions of the outer walls of the ten locking sleeves corresponding to the ten digits zero to nine of the corresponding digit wheel, whereby the gaps and the corresponding grooves of the ten locking sleeves represent the corresponding positions of the ten digits of the digit wheels, wherein the small-diameter wall of a respective locking sleeve is further provided with a plurality of positioning projections for engaging in the positioning engagement recesses of the corresponding digit wheel; a spring fitted onto the second projection of the locking seat; a lock bolt inserted into the number change stop and the number wheel set and provided with a projecting sliding block, wherein a projecting limiting strip is arranged on one side of the sliding block and is provided with a plurality of slots; and a cover covering the locking seat, the top of the cover being provided with a sliding groove through which the sliding block of the lock bolt is inserted, a through-hole being provided at each of the positions of the top of the cover corresponding to the number wheels of the number wheel set, an end surface of the cover being provided with a through-hole, the through-hole of the cover serving for the projection of the number change button to pass through, and an arcuate groove being provided on the inner wall of the cover and serving for the insertion of the limit rod of the number change button.

[0009] According to an advantageous embodiment of the memory combination lock according to the invention, several protruding blocks are arranged equidistantly in the receiving container, wherein a limiting gap is provided between each two protruding blocks for positioning the number wheels.

[0010] According to an advantageous embodiment of the memory combination lock according to the invention, a positioning locking recess is provided on the underside of the locking seat, wherein a positioning locking body is arranged at the position of the inner wall of the cover corresponding to the positioning locking recess of the locking seat.

[0011] According to an advantageous embodiment of the memory combination lock according to the invention, the positions of the corresponding grooves of the ten locking sleeves are described below: the corresponding groove of the first locking sleeve corresponds to the position of the number one of the corresponding number wheel; the corresponding groove of the second locking sleeve corresponds to the position of the number two of the corresponding number wheel; the corresponding groove of the third locking sleeve corresponds to the position of the number three of the corresponding number wheel; the corresponding groove of the fourth locking sleeve corresponds to the position of the number four of the corresponding number wheel; the corresponding groove of the fifth locking sleeve corresponds to the position of the number five of the corresponding number wheel;the corresponding groove of the sixth locking sleeve corresponds to the position of the number six of the corresponding number wheel; the corresponding groove of the seventh locking sleeve corresponds to the position of the number seven of the corresponding number wheel; the corresponding groove of the eighth locking sleeve corresponds to the position of the number eight of the corresponding number wheel; the corresponding groove of the ninth locking sleeve corresponds to the position of the number nine of the corresponding number wheel; and the corresponding groove of the tenth locking sleeve corresponds to the position of the number zero of the corresponding number wheel.

[0012] According to an advantageous embodiment of the memory combination lock according to the invention, the corresponding groove of a respective locking sleeve is provided on the small-diameter wall of this locking sleeve.

[0013] According to an advantageous embodiment of the memory combination lock according to the invention, the corresponding groove of a respective locking sleeve is provided on the wall with a large diameter of this locking sleeve.

[0014] According to an advantageous embodiment of the memory combination lock according to the invention, the number wheel set consists of a plurality of number wheels, a plurality of locking sleeves and a plurality of indicator rings, wherein an indicator ring is arranged on one side of a respective number wheel, a part of a respective indicator ring is located in the recess of the corresponding number wheel, a through hole is provided in the center of a respective indicator ring, a protruding locking body is provided in the through hole of a respective indicator ring and is locked into the corresponding groove of the corresponding locking sleeve and a protruding indicator projection is provided at the position corresponding to a respective locking body on the outer peripheral wall surface of the corresponding indicator ring.

[0015] According to an advantageous embodiment of the memory combination lock according to the invention, a corresponding marking is arranged between the through openings on the upper side of the cover.

[0016] According to an advantageous embodiment of the memory combination lock according to the invention, the cover is provided with a lock number.

[0017] The advantages of the memory combination lock according to the invention are that the different corresponding positions of the column and the corresponding grooves of the ten locking sleeves are created, thus providing a combination lock with an internal code. Even if a thief peers into the corresponding grooves of the locking sleeves of a combination lock, they cannot guess the positions of the column and unlock the combination lock, thus truly achieving an anti-theft function. A combination lock is equipped with its own internal code, which can be used to retrieve the unlock code, thus ensuring the security of the lock. Brief description of the drawings Fig. 1 shows an exploded perspective view of an embodiment according to the present invention; Fig. 2 shows an exploded perspective view of the embodiment according to the present invention from a different angle; Fig. 3 shows a perspective view of a locking sleeve of the embodiment according to the present invention; Fig. 4 shows a perspective view of another locking sleeve of the embodiment according to the present invention; Fig. 5 shows a perspective view of the embodiment according to the present invention; Fig. 6 shows a sectional view of the embodiment according to the present invention; Fig. 7 shows a top sectional view of the embodiment according to the present invention; Fig. Figure 8 shows a sectional view along the section line AA according to Fig. 7; Fig. 9 shows a sectional view along the section line BB according to Fig. 7; Fig. 10 shows a schematic view of the embodiment according to the present invention in which the lock bolt is displaced; Fig. 11 shows a schematic sectional view of the embodiment according to the present invention in which the locking sleeves are driven and thereby locked by rotating the number wheels; Fig. 12 shows a schematic perspective view of the interior of the lock of the embodiment according to the present invention, in which the number change knob is rotated; Fig. 13 shows a schematic view of the embodiment according to the present invention in which the number change knob is rotated and the locking sleeves are pressed to separate them from the number wheels; Fig. 14 is a schematic perspective view of the interior of the lock of the embodiment according to the present invention, in which the indicator projections of the indicator rings are driven to rotate upward and aligned with each other by rotating the number wheels; Fig. 15 shows a schematic sectional view of the embodiment according to the present invention in which all the indicator rings are rotated upwards and aligned with each other; Fig. 16 shows a schematic sectional view of the seventh locking sleeve of the embodiment according to Fig. 14; Fig. 17 shows a schematic sectional view of the embodiment according to Fig. 16, in which the locking sleeves are driven by rotating the number wheels so that the gaps are aligned with the projecting limit strip of the lock bolt in order to recover the original code; Fig. 18 shows a schematic sectional view of the fifth locking sleeve of the embodiment according to Fig. 14; Fig. 19 shows a schematic sectional view of the ninth locking sleeve of the embodiment according to Fig. 14; Fig. 20 shows a schematic sectional view of the third locking sleeve of the embodiment according to Fig. 14. Detailed description of the embodiment

[0018] In order to enable a better understanding of the objectives and advantageous effects of the present invention, a preferred embodiment will be described in detail below with reference to the accompanying drawings.

[0019] It is based on the Fig. 1 to 4, which show an embodiment of the present invention. The memory combination lock primarily comprises the following: a locking seat 1 provided with a receiving container 10, wherein a plurality of protruding blocks 11 are arranged equidistantly in the receiving container 10, a limiting gap 110 is provided between each two protruding blocks 11, an end portion of the locking seat 1 is provided with a recess 12, a first projection 13 is arranged at the position corresponding to the recess 12 in the receiving container 10 of the locking seat 1, the inner wall of the recess 12 is provided with a first through-hole 14 and two insertion grooves 15, the first through-hole 14 and the two insertion grooves 15 are continuously connected to the receiving container 10, the locking seat 1 is provided with a slot 16 continuously connected to the first through-hole 14,a second projection 17 is arranged at the position corresponding to the first projection 13 in the receiving container 10 of the locking seat 1, a second through-hole 170 is provided in the second projection 17, the second through-hole 170 is provided with a notch 171, and a positioning recess 18 is provided on the underside of the locking seat 1; a number change knob 21 disposed in the recess 12 of the locking seat 1, the outer end surface of the number change knob 21 being provided with a projection 210, the projection 210 being provided with a slot 211, the outer end surface of the number change knob 21 being further provided with a limiting rod 212, the other end portion of the number change knob 21 being provided with two guide slots 213, and one side of the two guide slots 213 being formed as an arcuate portion 214; a number change stopper 22,which is arranged in the receiving container 10 of the locking seat 1 and plugged onto the first projection 13 and provided with a through hole 220, wherein an end portion of the number change stopper 22 is provided with two guide tabs 221, the two guide tabs 221 are each inserted into the two plug-in grooves 15 of the locking seat 1 and arranged in the two guide slots 213 of the number change button 21, the side opposite the two guide tabs 221 is formed as a curved surface 222 and a positioning slot 223 is provided on the wall of the number change stopper 22 and is aligned with the slot 16 of the locking seat 1; a number wheel set arranged in the receiving container 10 of the locking seat 1 and consisting of a plurality of number wheels 3, a plurality of locking sleeves 4 and a plurality of display rings 5, the outer wall of each number wheel 3 being provided with ten (0 to 9) numbers 30 in a ring shape,a plurality of positioning engagement recesses 31 are provided in a ring shape at one end portion of the inner wall of each number wheel 3, a recess 32 is provided at the other end portion of each number wheel 3 and a through hole 33 is provided in the center of each number wheel 3, a respective locking sleeve 4 is arranged in the corresponding number wheel 3, the outer wall of each locking sleeve 4 has a large diameter wall 400 and a small diameter wall 401, a respective small diameter wall 401 is inserted through the through hole 33 of the corresponding number wheel 3, a large diameter through hole 402 and a small diameter through hole 403 are provided in the respective locking sleeve 4, a respective small diameter through hole 403 is provided with a gap 404, the locking sleeves 4 are manufactured in ten types (as in , Fig. 3) and a corresponding groove 405 is provided at the positions of the small diameter walls 401 of the ten locking sleeves 4 corresponding to the ten digits 30 zero to nine of the corresponding digit wheel 3, whereby the gaps 404 and the corresponding grooves 405 of the ten locking sleeves 4 represent the corresponding positions of the ten digits 30 of the digit wheels 3 (as shown in the Fig. 3 and Fig. 4), wherein the small diameter wall 401 of a respective locking sleeve 4 is further provided with a plurality of positioning projections 406 for engaging the positioning engagement recesses 31 of the corresponding number wheel 3, the positions of the corresponding grooves 405 of the ten locking sleeves 4 being described below: the corresponding groove 405 of the first locking sleeve 41 corresponds to the position of the number 30 one of the corresponding number wheel 3; the corresponding groove 405 of the second locking sleeve 42 corresponds to the position of the number 30 two of the corresponding number wheel 3; the corresponding groove 405 of the third locking sleeve 43 corresponds to the position of the number 30 three of the corresponding number wheel 3; the corresponding groove 405 of the fourth locking sleeve 44 corresponds to the position of the number 30 four of the corresponding number wheel 3;the corresponding groove 405 of the fifth locking sleeve 45 corresponds to the position of the number 30 five of the corresponding number wheel 3; the corresponding groove 405 of the sixth locking sleeve 46 corresponds to the position of the number 30 six of the corresponding number wheel 3; the corresponding groove 405 of the seventh locking sleeve 47 corresponds to the position of the number 30 seven of the corresponding number wheel 3; the corresponding groove 405 of the eighth locking sleeve 48 corresponds to the position of the number 30 eight of the corresponding number wheel 3; the corresponding groove 405 of the ninth locking sleeve 49 corresponds to the position of the number 30 nine of the corresponding number wheel 3;and the corresponding groove 405 of the tenth locking sleeve 40 corresponds to the position of the number 30 zero of the corresponding number wheel 3, wherein the corresponding groove 405 of a respective locking sleeve 4 can also be provided on the large diameter wall 400 of a respective locking sleeve 4' (as in ; Fig. 4, this is a different embodiment of the respective locking sleeves), where, as in Fig. 4, the corresponding groove 405 of the first locking sleeve 41' corresponds to the position of the number 30 [1] of the corresponding number wheel 3; the corresponding groove 405 of the second locking sleeve 42' corresponds to the position of the number 30 [2] of the corresponding number wheel 3; the corresponding groove 405 of the third locking sleeve 43' corresponds to the position of the number 30 [3] of the corresponding number wheel 3; the corresponding groove 405 of the fourth locking sleeve 44' corresponds to the position of the number 30 [4] of the corresponding number wheel 3; the corresponding groove 405 of the fifth locking sleeve 45' corresponds to the position of the number 30 [5] of the corresponding number wheel 3; the corresponding groove 405 of the sixth locking sleeve 46' corresponds to the position of the number 30 [6] of the corresponding number wheel 3; the corresponding groove 405 of the seventh locking sleeve 47' corresponds to the position of the number 30[7] of the corresponding number wheel 3; the corresponding groove 405 of the eighth locking sleeve 48' corresponds to the position of the number 30 [8] of the corresponding number wheel 3; the corresponding groove 405 of the ninth locking sleeve 49' corresponds to the position of the number 30 [9] of the corresponding number wheel 3; and the corresponding groove 405 of the tenth locking sleeve 40' corresponds to the position of the number 30 [0] of the corresponding number wheel 3, wherein an indicator ring 5 is arranged on one side of a respective number wheel 3, a part of a respective indicator ring 5 is located in the recess 32 of the corresponding number wheel 3, a through-hole 50 is provided in the center of a respective indicator ring 5, a protruding locking body 51 is provided in the through-hole 50 of a respective indicator ring 5 and is locked into the corresponding groove 405 of the corresponding locking sleeve 4 and aa protruding indicator projection 52 is provided at the position corresponding to a respective detent body 51 on the outer peripheral wall surface of the corresponding indicator ring 5; a spring 6 arranged in the receiving container 10 of the locking seat 1 and fitted onto the second projection 17 of the locking seat 1; a lock bolt 7 fitted into the number change stopper 22 and the number wheel set and provided with a protruding slide block 70, a protruding limiting strip 71 being arranged on one side of the slide block 70 and provided with a plurality of slots 72; and a cover 8 covering the locking seat 1, wherein the upper side of the cover 8 is provided with a sliding groove 80 through which the sliding block 70 of the lock bolt 7 is inserted, a through hole 81 is provided at the positions of the upper side of the cover 8 corresponding to the number wheels 3 of the number wheel set, aA corresponding marking 82 is arranged between the through-holes 81 on the upper side of the cover 8, an end surface of the cover 8 is provided with a through-hole 83, the through-hole 83 of the cover 8 serves for the insertion of the projection 210 of the number change button 21, an arcuate groove 84 is provided on the inner wall of the cover 8 and serves for the insertion of the limit rod 212 of the number change button 21, a positioning detent body 85 is arranged at the position of the inner wall of the cover 8 corresponding to the positioning detent recess 18 of the locking seat 1, and the cover 8 is provided with a lock number 86. In this way, a memory combination lock is formed.

[0020] It is based on the Fig. 1 to 9. During assembly of the embodiment of the present invention, a memory combination lock is provided with a lock number 86 on the cover 8, wherein each lock number 86 is provided with an "internal code," and the "internal code" is determined by the manufacturing company during assembly. Optionally, three or four locking sleeves 4 can be provided. In the present embodiment, four locking sleeves 4 are provided. The four locking sleeves 4 represent the "internal code" of the lock, wherein the positions of the corresponding grooves 405 of the four locking sleeves 4 can be different or the same. As shown in the Fig. 1 and Fig. 2 of the present embodiment, for example, the seventh locking sleeve 47, the fifth locking sleeve 45, the ninth locking sleeve 49 and the third locking sleeve 43 (in the Fig. 3), the corresponding positions of the four corresponding grooves 405 of the locking sleeves 4 representing the "internal code" of the lock (from left to right, "7, 5, 9, 3"). The four locking sleeves 4 are each housed in the corresponding number wheels 3. The gaps 404 of the locking sleeves 4 correspond to the numbers 30 located on the top side of the corresponding number wheels 3 (the code set in the present embodiment is located at the "0" position, the number on the corresponding number wheel 3 being the "external code," and in the present embodiment, the external code is "0,0,0,0," which represents the "unlock code" of this combination lock). The small-diameter wall 401 of each locking sleeve 4 is inserted through the through-hole 33 of the corresponding number wheel 3.The positioning projection 406 of a respective locking sleeve 4 is engaged in the positioning engagement recess 31 of the corresponding number wheel 3 (as shown in FIGS. Fig. 7 and Fig. 9). In addition, four indicator rings 5 ​​are arranged on each side of the four number wheels 3, wherein the small diameter wall 401 of a respective locking sleeve 4 is pushed through the through-bore 50 of the corresponding indicator ring 5 and the locking body 51 of the corresponding indicator ring 5 is engaged in the corresponding groove 405 of the corresponding locking sleeve 4 (when assembling the locking sleeves 4' of a number wheel as shown in Fig. 4, the indicator rings 5 ​​are each mounted on the other side of the corresponding number wheels 3, with the large-diameter wall 400 of a respective locking sleeve 4' being pushed through the through-bore 50 of the corresponding indicator ring 5, and the locking body 51 of a respective indicator ring 5 being engaged in the corresponding groove 405 of the corresponding locking sleeve 4'. Subsequently, the number change stop 22 is arranged in front of the locking sleeve 4 located at the far left end. The lock bolt 7 is pushed through the through-hole 220 of the number change stop 22 through the large-diameter through-bores 402 and the small-diameter through-bores 403 of all locking sleeves 4.The protruding limiting strip 71 of the lock bolt 7 corresponds to the gaps 404 of the corresponding locking sleeves 4. Furthermore, one end of the spring 6 rests against the locking sleeve 4 located at the rightmost end. The lock bolt 7, the number change stop 22, the digit wheel set, and the spring 6, which are already assembled, are then inserted into the receptacle 10 of the locking seat 1. The other end of the spring 6 is placed onto the second projection 17 of the locking seat 1. The left end of the lock bolt 7 is inserted through the first through-hole 14 of the locking seat 1. The sliding block 70 of the lock bolt 7 protrudes from the slot 16 of the locking seat 1. The right end of the lock bolt 7 is inserted into the second through-hole 170 of the locking seat 1.the two guide tabs 221 of the number change stop 22 are each pushed through the two plug-in grooves 15 of the locking seat 1, the lower end of a respective number wheel 3 is located in the corresponding limiting gap 110 of the locking seat 1, the number change button 21 is arranged in the recess 12 of the locking seat 1 and the two guide tabs 221 of the number change stop 22 are located in the corresponding guide slots 213 of the number change button 21. Subsequently, the locking seat 1 is covered by the cover 8, whereby the positioning locking body 85 of the cover 8 is engaged in the positioning locking recess 18 of the locking seat 1, wherein the projection 210 of the number change button 21 corresponds to the through hole 83 of the cover 8, the limiting rod 212 of the number change button 21 is arranged in the curved groove 84 of the cover 8,The sliding block 70 of the lock bolt 7 protrudes from the sliding groove 80 of the cover 8, and the end sections of the number wheels 3 protrude from the corresponding through holes 81 of the cover 8. This completes the overall assembly.

[0021] It is based on the Fig. 5 to 11. When using the present invention, the combination lock according to the invention is attached to an object to be locked, such as a door lock, a bicycle lock, a suitcase, a safe, etc. To lock, only the sliding block 70 of the lock bolt 7 needs to be pressed to move it (as in Fig. 10), wherein one end of the lock bolt 7 protrudes from the second through-hole 170 of the locking seat 1 and the protruding limiting strip 71 of the lock bolt 7 is separated from the gaps 404 of the corresponding locking sleeves 4 and is no longer limited by the corresponding locking sleeves 4, so that the number wheels 3 can be rotated to generate the random numbers. The locking sleeves 4 are driven to rotate by the corresponding number wheels 3, wherein the indicator rings 5 ​​are driven to rotate by the locking sleeves 4, whereby the gaps 404 of the locking sleeves 4 are rotated and moved (as in Fig. 11) and no longer aligned with the protruding limiting strip 71 of the lock bolt 7 in order to lock the lock bolt 7 without it being retracted. In this way, the object to be locked can be locked to complete the locking process. To unlock, only the number wheels 3 need to be rotated so that, when the numbers 30 of the number wheels 3 are the set code of the lock (in the present embodiment, the unlocking code is "0,0,0,0"), the gaps 404 of the locking sleeves 4 are again aligned with each other and with the protruding limiting strip 71 of the lock bolt 7, so that the lock bolt 7 is no longer limited by the locking sleeves 4, but can be retracted axially to achieve an unlocked state (as in Fig. 6). This completes the unlocking process.

[0022] It is based on the Fig. 12 and Fig. 13. In the embodiment of the present invention, when the code is to be changed, only to rotate the number change knob 21, a tool needs to be inserted into the slot 211 of the projection 210 of the number change knob 21, wherein the limit rod 212 of the number change knob 21 is rotated in the arcuate groove 84 of the cover 8, the curved surfaces 222 of the two guide tabs 221 of the number change stop 22 are pushed to the right by the rotation of the number change knob 21 along the arcuate portion 214 of the number change knob 21, all the locking sleeves 4 are also pushed to the right by the number change stop 22, and the spring 6 is elastically compressed, whereby the positioning projections 406 of the locking sleeves 4 are separated from the positioning engagement recesses 31 of the corresponding number wheels 3 (as in Fig. 13), whereby the number wheels 3 are no longer limited by the lock bolt 7 and the locking sleeves 4 and are thus rotatable, so that the desired code of the lock can be freely set. After the number wheels 3 have been rotated so that the desired code is set, the number change button 21 is turned back to its original position by means of a tool, whereby the number change stop 22 is no longer blocked by the curved section 214 of the number change button 21 and the spring 6 is elastically reset (as in Fig. 6). The locking sleeves 4 and the number change stop 22 are axially retracted to their original positions, with the positioning projections 406 of the locking sleeves 4 re-engaged in the positioning engagement recesses 31 of the corresponding number wheels 3, and the guide tabs 221 of the number change stop 22 re-engaged in the guide slots 213 of the number change knob 21. This completes the number change setting of the memory combination lock.

[0023] In the present invention, a memory combination lock is provided with an "internal code." The user can save or record the "internal code" for emergency use. The consumer can also enter their personal information and the lock number 86 online. If they forget the code, they can call the manufacturer or log in online to request the "internal code" of the memory combination lock. Even after changing the code, the user only needs to remember the "internal code" to retrieve the originally set code, eliminating the need to hire a professional to unlock or destroy the lock, thus achieving the purpose of convenient unlocking and protecting the combination lock. Fig. 14 to 20. If the user has forgotten the code and wants to find out the code of the lock, he only has to turn the number wheels 3 of the memory combination lock, whereby the locking sleeves 47, 45, 49, 43 are driven to rotate by the number wheels 3 and the indicator rings 5 ​​are rotated along with them, whereby the indicator projections 52 of the indicator rings 5 ​​corresponding to the number wheels 3 are turned all the way up (as in the Fig. 14, Fig. 15 and Fig. 16), whereby the indicator protrusions 52 are aligned with the corresponding corresponding marks 82 of the cover 8. At this time, the digits 30 of the digit wheels 3 are not the set code because the corresponding positions of the gap 404 and the corresponding grooves 405 of the locking sleeves 4 are all different. Therefore, even if a thief finds the corresponding groove 405 of a locking sleeve 4, he still cannot know which position the gap 404 of that locking sleeve 4 corresponds to. In this way, to retrieve the code, the user only needs to obtain the "internal code" of the memory combination lock. After aligning the indicator protrusions 52 of the indicator rings 5 ​​with each other, the digit wheels 3 are rotated sequentially to the corresponding positions according to the "internal code" of the memory combination lock.For example, if the "internal code" of the memory combination lock is "7,5,9,3", the leftmost number wheel 3 must be turned upwards (counterclockwise) seven times (as shown in the . Fig. 16 and Fig. 17), whereby the columns 404 of the locking sleeves 4 must be rotated to the positions in which they are aligned with the projecting limiting strip 71 of the lock bolt 7, whereby successively the second number wheel 3 located on the left side is rotated upwards five times (as in Fig. 18), the third digit wheel 3 on the right side is turned upwards nine times (as shown in Fig. 19) and the rightmost dial 3 must be turned upwards three times (as shown in Fig.20), whereby the columns 404 of the locking sleeves 47, 45, 49, 43 can be aligned with each other to achieve the purpose of retrieving the unlock code. The number wheels 3 can also be rotated in the opposite direction, in which case the leftmost number wheel 3 must be turned downward (clockwise) three times, the second number wheel 3 on the left side must be turned downward five times, the third number wheel 3 on the right side must be turned downward once, and the rightmost number wheel 3 must be turned downward seven times. The number wheels 3 are rotated downward the corresponding number of times in succession to align the columns 404 of the locking sleeves 47, 45, 49, 43 with each other.Furthermore, the sum of the corresponding digits 30 of the digit wheels 3 can also be used after aligning the indicator rings 5 ​​and the corresponding "internal code", with the last digit of the sum serving as the correct unlock code. For example, if the digit 30 of a digit wheel 3 is [3], the internal code is [7], the sum is "10", and the last digit is taken, the correct code for this digit wheel 3 is "0", so the digit 30 of this digit wheel 3 is simply turned to [0]. Or if the digit 30 of a digit wheel 3 is [8], the internal code is [7], the sum is "15", and the last digit is taken, the correct code for this digit wheel 3 is "5", so to regain the originally set code, the digit 30 of this digit wheel 3 is simply turned to [5].In this way, a thief cannot guess the "internal code" of the memory combination lock, thereby preventing the thief from spying into the corresponding grooves 405 of the locking sleeves 4 to unlock. Even if the thief peers into the corresponding grooves 405 of the locking sleeves 4, with the structure of the memory combination lock according to the invention, it is difficult to guess the unlocking code unless they obtain the "internal code" of the memory combination lock. Thus, the invention achieves the advantageous effects of preventing spying and unlocking and recovering the code.

[0024] In summary, it can be stated that the present invention actually achieves the stated objective and the desired advantageous effects, and the present invention is superior to the conventional technology. The above description represents only preferred embodiments of the invention and is not intended to limit the claims. All equivalent changes and modifications that can be made by one skilled in the art in accordance with the description and drawings of the invention are within the scope of the present invention.

Claims

[1] A memory combination lock comprising: a locking seat (1) provided with a receiving container (10), wherein an end portion of the locking seat (1) is provided with a recess (12), wherein a first projection (13) is arranged at the position corresponding to the recess (12) in the receiving container (10) of the locking seat (1), wherein the inner wall of the recess (12) is provided with a first through-bore (14) and two plug-in grooves (15), wherein the first through-bore (14) and the two plug-in grooves (15) are continuously connected to the receiving container (10), wherein the locking seat (1) is provided with a slot (16) continuously connected to the first through-bore (14), wherein a second projection (17) which is arranged at a position opposite to the first projection (13) in the receiving container (10) of the locking seat (1),wherein a second through-hole (170) is provided in the second projection (17) and the second through-hole (170) is provided with a notch (171);, a number change button (21) arranged in the recess (12) of the locking seat (1), wherein an outer end surface of the number change button (21) is provided with a projection (210), wherein the projection (210) is provided with a slot (211), wherein the outer end surface of the number change button (21) is further provided with a limiting rod (212), wherein an end portion of the number change button (21) is provided with two guide slots (213), and wherein one side of the two guide slots (213) is each formed as an arc portion (214); a number change stop (22) which is plugged onto the first projection (13) of the locking seat (1) and provided with a through hole (220), wherein an end portion of the number change stop (22) is provided with two guide tabs (221), wherein the two guide tabs (221) are each inserted into the two plug-in grooves (15) of the locking seat (1) and arranged in the two guide slots (213) of the number change button (21), wherein the side opposite the two guide tabs (221) is designed as a curved surface (222) and a positioning slot (223) is provided on the wall of the number change stop (22) and is aligned with the slot (16) of the locking seat (1); a number wheel set arranged in the receiving container (10) of the locking seat (1) and consisting of a plurality of number wheels (3) and a plurality of locking sleeves (4), wherein the outer wall of each number wheel (3) is provided annularly with ten digits (30) from zero to nine, wherein a plurality of positioning engagement recesses (31) are provided annularly at one end portion of the inner wall of a respective number wheel (3), wherein a recess (32) is provided at the other end portion of a respective number wheel (3) and a through hole (33) is provided in the center of a respective number wheel (3), wherein a respective locking sleeve (4) is arranged in the corresponding number wheel (3), wherein the outer wall of a respective locking sleeve (4) has a large diameter wall (400) and a small diameter wall (401), wherein a respective small diameter wall (401) passes through the through hole (33) of the corresponding number wheel (3) is pushed through,wherein a large-diameter through-hole (402) and a small-diameter through-hole (403) are provided in the respective locking sleeve (4), wherein the respective small-diameter through-hole (403) is provided with a gap (404), wherein the locking sleeves (4) are manufactured in ten types and a corresponding groove (405) is provided at the positions of the outer walls of the ten locking sleeves (4) corresponding to the ten digits (30) zero to nine of the corresponding digit wheel (3), whereby the gaps (404) and the corresponding grooves (405) of the ten locking sleeves (4) represent the corresponding positions of the ten digits (30) of the digit wheels (3), wherein the small-diameter wall (401) of a respective locking sleeve (4) is further provided with a plurality of positioning projections (406) for engaging in the positioning engagement recesses (31) of the corresponding number wheel (3);, a spring (6) which is fitted onto the second projection (17) of the locking seat (1); a lock bolt (7) inserted into the number change stop (22) and the number wheel set and provided with a projecting sliding block (70), wherein a projecting limiting strip (71) is arranged on one side of the sliding block (70) of the lock bolt (7) and is provided with a plurality of slots (72); and a cover (8) covering the locking seat (1), the upper side of the cover (8) being provided with a sliding groove (80) through which the sliding block (70) of the lock bolt (7) is inserted, a through-opening (81) being provided at each of the positions of the upper side of the cover (8) corresponding to the number wheels (3) of the number wheel set, an end surface of the cover (8) being provided with a through-hole (83), the through-hole (83) of the cover (8) serving for the insertion of the projection (210) of the number change button (21), and an arcuate groove (84) being provided on the inner wall of the cover (8) and serving for the insertion of the limit rod (212) of the number change button (21). [2] Memory combination lock according to claim 1, wherein a plurality of projecting blocks (11) are arranged equidistantly in the receiving container (10) of the locking seat (1), wherein a limiting gap (110) is provided between each two projecting blocks (11). [3] Memory combination lock according to claim 1, wherein a positioning locking recess (18) is provided on the underside of the locking seat (1), wherein a positioning locking body (85) is arranged at the position of the inner wall of the cover (8) corresponding to the positioning locking recess (18) of the locking seat (1). [4] Memory combination lock according to claim 1, wherein the positions of the corresponding grooves (405) of the ten locking sleeves (4) are described below: The corresponding groove (405) of the first locking sleeve (41) corresponds to the position of the number (30) one of the corresponding number wheel (3); the corresponding groove (405) of the second locking sleeve (42) corresponds to the position of the number (30) two of the corresponding number wheel (3); the corresponding groove (405) of the third locking sleeve (43) corresponds to the position of the number (30) three of the corresponding number wheel (3); the corresponding groove (405) of the fourth locking sleeve (44) corresponds to the position of the number (30) four of the corresponding number wheel (3); the corresponding groove (405) of the fifth locking sleeve (45) corresponds to the position of the number (30) five of the corresponding number wheel (3);the corresponding groove (405) of the sixth locking sleeve (46) corresponds to the position of the number (30) six of the corresponding number wheel (3); the corresponding groove (405) of the seventh locking sleeve (47) corresponds to the position of the number (30) seven of the corresponding number wheel (3); the corresponding groove (405) of the eighth locking sleeve (48) corresponds to the position of the number (30) eight of the corresponding number wheel (3); the corresponding groove (405) of the ninth locking sleeve (49) corresponds to the position of the number (30) nine of the corresponding number wheel (3); and the corresponding groove (405) of the tenth locking sleeve (40) corresponds to the position of the number (30) zero of the corresponding number wheel (3). [5] Memory combination lock according to claim 1, wherein the corresponding groove (405) of a respective locking sleeve (4) is provided on the small diameter wall (401) of this locking sleeve (4). [6] Memory combination lock according to claim 1, wherein the corresponding groove (405) of a respective locking sleeve (4) is provided on the large diameter wall (400) of this locking sleeve (4). [7] Memory combination lock according to claim 1, wherein the number wheel set consists of a plurality of number wheels (3), a plurality of locking sleeves (4) and a plurality of indicator rings (5), wherein an indicator ring (5) is arranged on one side of a respective number wheel (3), a part of a respective indicator ring (5) is located in the recess (32) of the corresponding number wheel (3), a through hole (50) is provided in the center of a respective indicator ring (5), a projecting locking body (51) is provided in the through hole (50) of a respective indicator ring (5) and is engaged in the corresponding groove (405) of the corresponding locking sleeve (4), and a projecting indicator projection (52) is provided at the position corresponding to a respective locking body (51) on the outer peripheral wall surface of the corresponding indicator ring (5). [8] Memory combination lock according to claim 1, wherein a corresponding marking (82) is arranged between the through openings (81) on the upper side of the cover (8). [9] Memory combination lock according to claim 1, wherein the cover (8) is provided with a lock number (86).

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