A rotary dial lock capable of automatically clearing the code

Abstract

The present application relates to a kind of automatic code clearing turntable cipher lock, including zero reset unit, including zero reset cam and pawl, zero reset cam is arranged on alphabet wheel group;When pawl and zero reset part contact, zero reset cam is locked;Matching part includes the guide portion of the inner circle of knob, lock tongue moves along guide portion and is cooperated with locking groove and unlocking groove, so that alphabet wheel unit has locking state and unlocking state;Lock tongue has first stroke and second stroke on guide portion;In first stroke, lock tongue is at least partially contacted with the inner surface of guide portion, and moves along the inner surface;After alphabet wheel group is zero reset, lock tongue enters second stroke, and lock tongue is located below guide portion and is contacted with the lower end surface of guide portion.The beneficial effects of the present application are that: by the cooperation of the guide portion and the movable lock tongue with special structure, the cipher lock can be zero reset when it is unlocked after successful unlocking, reducing the possibility of correct password being leaked, and the security performance is stronger.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of locks, in particular to a rotating disc password lock capable of automatically clearing codes. BACKGROUND

[0002] At present, the password locks in use mainly include mechanical and electronic types, wherein the mechanical password lock is favored by the majority of consumers due to its simple use method, ability to withstand quite harsh environment, wide use range, energy saving and environmental protection and other advantages. The mechanical password locks circulating on the market will display the correct password after unlocking and locking, and need to be manually cleared. If the user forgets to clear the code, the correct password can be easily identified by others, which may cause significant loss and poor security. Therefore, it is particularly important to develop a mechanical password lock capable of automatically clearing codes after unlocking.

[0003] The Chinese utility model patent with the authorized announcement number CN211144035U discloses an automatic random code password lock, which comprises a panel, a character wheel assembly, a knob and a fixed seat; the knob is rotatably installed between the panel and the fixed seat; the character wheel assembly is installed in the knob, and the character wheel of the character wheel assembly and the secondary bushing are movably clamped.

[0004] However, the random code program of the password lock can only be started when the knob is reversely rotated for locking, and the character wheel still displays the correct password in the unlocking state, which is still insufficient in security. SUMMARY

[0005] In order to solve the above problems in the prior art, the present application provides a rotating disc password lock capable of automatically clearing codes.

[0006] The technical scheme for solving the technical problems of the present application is as follows:

[0007] A shell assembly; the shell assembly comprises a shell with an installation space composed of a panel, a knob and a fixed seat; the back of the shell assembly is provided with a lock tongue, and the knob drives the lock tongue to rotate and lock with a door cabinet;

[0008] A character wheel unit; comprising a plurality of character wheel groups and a core shaft penetrating the center of the character wheel group; the end of the core shaft is provided with a lock tongue, and the inner ring wall of the knob is provided with a matching part corresponding to the lock tongue;

[0009] A zero reset unit, comprising a zero reset cam and a pawl, the zero reset cam is arranged on the character wheel group and rotates with the character wheel group; the pawl is driven by the shell assembly, and is close to and contacts the drive zero reset cam;

[0010] The zero reset cam is provided with a zero reset part and a driving part, the pawl and the driving part are in contact to drive the zero reset cam to rotate, and the pawl and the zero reset part are in contact to lock the zero reset cam;

[0011] The pawl is provided with a first driving shaft, and the shell assembly is provided with a first driving part capable of driving the first driving shaft to move; the first driving part drives the pawl to approach and contact the zero reset cam to drive the zero reset cam to rotate and reset to zero;

[0012] The matching part comprises a guide part provided on the inner ring of the knob, and the guide part is provided with a locking groove and an unlocking groove at two ends respectively; the locking tongue moves along the guide part and cooperates with the locking groove and the unlocking groove to make the dial unit have a locking state and an unlocking state;

[0013] The locking tongue has a first stroke and a second stroke on the guide part;

[0014] In the first stroke, the locking tongue is at least partially in contact with the inner surface of the guide part and moves along the inner surface;

[0015] After the dial assembly is reset to zero, the locking tongue enters the second stroke, and the locking tongue is located below the guide part and in contact with the lower end surface of the guide part.

[0016] The above technical solution is further provided as follows: the guide part is an arc-shaped convex part provided on the inner ring of the knob in the circumferential direction, and the locking groove and the unlocking groove are connected with the two ends of the arc-shaped convex part;

[0017] The distance between the lower end surface of the guide part and the fixed seat gradually increases in the direction from the locking groove to the unlocking groove.

[0018] The above technical solution is further provided as follows: the first driving part is sequentially provided with a close area and a contact area; when the first driving part is driven by the close area, the pawl approaches the zero reset cam; when the first driving part is driven by the contact area, the pawl is in contact with the surface of the zero reset cam and drives the zero reset cam to rotate.

[0019] The above technical solution is further provided as follows: an inclined tongue pressing surface is provided on the upper end surface of the locking tongue, and the outer end of the tongue pressing surface is lower than the bottom of the unlocking end of the guide part.

[0020] The above technical solution is further provided as follows: the end of the mandrel is provided with a locking tongue holder, the locking tongue is arranged in the locking tongue holder, and the front end extends out of the locking tongue holder;

[0021] A resilient top holding piece is arranged between the bottom of the locking tongue and the locking tongue holder.

[0022] A further configuration of the above technical solution is as follows: the pawl is mounted on a drive rod, and the first drive shaft is located on the drive rod; the drive rod is also provided with a spring-loaded pawl and a second drive shaft for driving the spring-loaded pawl to move, and the housing assembly is provided with a second drive part that can move with the second drive shaft.

[0023] A further provision of the above technical solution is that the first driving unit and the second driving unit are misaligned.

[0024] The above technical solution is further configured to include:

[0025] The code-finding assembly includes a lock cylinder, a drive component, and a code-finding key connected in sequence.

[0026] The code-finding key includes a code-finding claw and a code-finding shaft located at corresponding positions on the code-finding lever; the driving component pulls the code-finding shaft outward, causing the code-finding lever to rotate and bringing the code-finding claw closer to the character wheel assembly.

[0027] A further configuration of the above technical solution is as follows: one end of the driving component is fixed to the lock cylinder, and the other end is a hook to hook the code-finding shaft.

[0028] A further provision of the above technical solution is that: the spindle is also provided with a code-changing tongue, the code-changing tongue and the locking tongue are located at the same end, and the outer shell assembly is provided with a corresponding code-changing groove;

[0029] The character wheel assembly includes a plurality of character wheels that are sleeved on the spindle and marked with numbers in the circumferential direction. A character wheel core is provided between the inner ring of the character wheel and the spindle, and the character wheel and the character wheel core are connected by a keyway.

[0030] The other end of the spindle is provided with a push block and a second spring to press the character wheel core tightly against the end of the code-changing tongue.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting a zeroing unit, the combination lock can return to zero immediately after successful unlocking by cooperating with the guide part with a special structure and the movable locking tongue, thereby reducing the possibility of the correct password being leaked and improving the security performance. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the explosion structure of the invention.

[0033] Figure 2 This is a schematic diagram of the exploded structure of the character wheel assembly.

[0034] Figure 3 This is an exploded structural diagram of the housing assembly.

[0035] Figure 4 This is an isometric sectional view of the knob.

[0036] Figure 5 Structure diagram of the pawl and the elastic pawl.

[0037] Figure 6 Structure diagram of the connection between the pawl and the dial set.

[0038] Figure 7 Structure diagram of the position of the locking tongue and the guide part in the unlocked state.

[0039] Figure 8 Structure diagram of the dial set and the code searching assembly.

[0040] Figure 9 Structure diagram of the cross section of the application in the locked state.

[0041] Figure 10 Structure diagram of the cross section of the connection between the locking tongue and the spindle.

[0042] Figure 11 Structure diagram of the position of the driving rod, the code searching rod and the spindle on the dial frame.

[0043] The annotations on the drawings are as follows: 100, housing assembly; 110, faceplate; 120, knob; 121, driving plate; 130, fixed seat; 122, first driving part; 123, guide part; 124, connecting column; 130, thickened wall; 122.1, close area; 122.2, contact area; 122.3, far area; 124, limiting groove; 125, second driving part; 125.1, elastic pawl area; 125.2, idling area;

[0044] 200, dial set; 210, dial; 211, elastic pawl ring; 211.1, elastic pawl groove; 220, dial core; 230, code searching ring; 231, code searching groove;

[0045] 300, spindle; 310, locking tongue frame;

[0046] 400, locking tongue; 401, pressing surface;

[0047] 500, reset cam; 510, driving position; 520, reset position;

[0048] 610, pawl; 620, first driving shaft; 630, driving rod; 640, elastic pawl; 650, second driving shaft;

[0049] 700, code searching assembly; 710, lock cylinder; 720, driving component; 730, code searching key; 731, code searching pawl; 732, code searching rod; 733, code searching shaft;

[0050] 800, code changing tongue;

[0051] 1, lock piece; 2, elastic top holding piece; 3, short shaft; 4, guide column; 5, pushing block; 6, second spring; 7, dial holder; 8, reset spring; a, unlocking groove; b, locking groove; c, code changing groove; d, auxiliary groove; 10, first spring. DETAILED DESCRIPTION

[0052] In order to further clarify the technical means and effects of the present application for achieving the predetermined object, the specific embodiments, structures, features and effects according to the present application are described in detail as follows in combination with the drawings and preferred embodiments.

[0053] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0054] It should be understood that although the terms upper, middle, lower, top end, one end, etc. appear in the text to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for the purpose of understanding, not for defining any direction or sequence limitation.

[0055] As Figures 1-11 shown, the present embodiment provides a turntable password lock capable of automatically clearing the code.

[0056] It should be pointed out that the said zero reset in the present embodiment does not mean only that the number displayed on the dial is zero, but to return to the set number, and the set value is not the correct unlocking password.

[0057] Referring to Figure 1 shown, it specifically comprises,

[0058] a housing assembly 100; the housing assembly 100 comprises a shell with an installation space inside, which is composed of a panel 110, a knob 120 and a fixed seat 130; the back of the housing assembly 100 is provided with a lock piece 1, and the knob 120 drives the lock piece 1 to rotate and lock with the cabinet;

[0059] a dial 210 unit; comprising a plurality of dial groups 200 and a core shaft 300 penetrating through the center of the dial group 200; the end of the core shaft 300 is provided with a lock tongue 400, and the inner ring wall of the knob 120 is provided with a matching part corresponding to the lock tongue 400;

[0060] a zero reset unit, comprising a zero reset cam 500 and a pawl 610, the zero reset cam 500 is arranged on the dial group 200 and rotates with the dial group 200; the pawl 610 is driven by the knob 120, and is close to and contacts the driving zero reset cam 500;

[0061] The zero reset cam 500 is provided with a zero reset part 520 and a driving part 510. When the pawl 610 contacts the driving part 510, the zero reset cam 500 is driven to rotate. When the pawl 610 contacts the zero reset part 520, the zero reset cam 500 is locked.

[0062] The pawl 610 is provided with a first driving shaft 620. The housing assembly 100 is provided with a first driving part 122 capable of driving the first driving shaft 620 to move. The first driving part 122 drives the pawl 610 to move close to and contact the zero reset cam 500, and drives the zero reset cam 500 to rotate to zero reset.

[0063] The housing assembly 100 is provided with a guide part 123 corresponding to the stroke of the zero reset unit. The guide part 123 is provided with a locking groove b and an unlocking groove a at two ends respectively. The locking tongue 400 moves along the guide part 123 and cooperates with the locking groove b and the unlocking groove a, so that the dial unit has a locking state and an unlocking state.

[0064] The locking tongue 400 moves along the guide part 123 and has a first stroke and a second stroke.

[0065] In the first stroke, the locking tongue 400 at least partially contacts the inner surface of the guide part 123 and moves along the inner surface.

[0066] After the dial set 200 is reset to zero, the locking tongue 400 enters the second stroke, and the locking tongue 400 is located below the guide part 123 and contacts the lower end surface of the guide part 123.

[0067] The above is the basic scheme of the embodiment. After the user dials the dial 210 set 200 to the correct password, the dial 210 unit is unlocked, and the mandrel 300 can move. Rotate the knob 120, and the inner circle of the knob 120 moves relative to the locking tongue 400.

[0068] The locking tongue 400 first enters the first stroke, contacts the inner circle surface of the guide part 123, and slides along the inner circle. At the same time, the pawl 610 on the zero reset unit gradually approaches the zero reset cam 500 during the first stroke. When the pawl 610 contacts the driving part 510 of the zero reset cam 500, the pawl 610 generates pressure on the zero reset cam 500, drives the zero reset cam 500 to rotate, until the pawl 610 contacts the driving part 510 on the zero reset cam 500. At this time, the zero reset cam 500 rotates to the set position, that is, the zero reset position.

[0069] At this time, the locking tongue 400 has moved to the set position of the guide part 123. At this position, the locking tongue 400 slides to the lower side of the guide part 123 and contacts the lower end surface of the guide part 123.

[0070] At the same time, due to the action of the reset unit, the dial unit is locked, and the spindle 300 cannot be retracted, i.e., the spindle 300 is in a locked state.

[0071] When the knob 120 is rotated reversely to be locked, the locking tongue 400 always abuts against the lower end surface of the guide portion 123 and moves until it returns to the locked position.

[0072] Preferably, in the embodiment, the reset cam 500 is a logarithmic spiral cam.

[0073] Referring to Figure 2 As shown, the reset cam 500 is connected to the dial 210 through a key groove; the logarithmic spiral cam has an approximately peach-shaped and symmetrical outer periphery, and one end thereof is provided with a flat surface, which is a reset portion 520; one end of the pawl 610 is a flat surface, when the pawl 610 contacts the driving portion 510, since the driving portion 510 is an arc surface, a line contact is formed, and when the pawl 610 exerts a force on the driving portion 510, the direction of the force is inclined to the driving portion 510, thus pushing the reset cam 500 to rotate; when the pawl 610 contacts the reset portion 520, the reset portion 520 is a flat surface, and a surface contact is formed between the reset portion 520 and the pawl 610, and the force of the pawl 610 on the reset portion 520 is perpendicular to the flat surface and directed to the rotation axis of the logarithmic spiral cam, thus the logarithmic spiral cam cannot rotate.

[0074] In order to realize the change of the two position states of the locking tongue 400 on the guide portion 123, the guide portion 123 is an arc convex portion provided on the inner circle of the knob 120 in the circumferential direction, and the locked slot b and the unlocking slot a are connected to the two ends of the arc convex portion;

[0075] Referring to Figure 7 As shown, the distance between the lower end surface of the guide portion 123 and the fixed seat 130 gradually increases from the locked end to the unlocking end.

[0076] Thus, in the first stroke, the outer end of the locking tongue 400 contacts the inner circle of the guide portion 123 and moves under the guidance of the guide portion 123; and in the moving process, since the lower end surface of the guide portion 123 is an inclined surface and the inclined direction is upward along the rotation direction, i.e., the contact area between the outer end of the locking tongue 400 and the inner circle of the guide portion 123 gradually decreases in the moving process; at the moment when the reset unit is activated, the contact area between the outer end of the locking tongue 400 and the inner circle of the guide portion 123 is zero, the position of the locking tongue 400 in the vertical direction is below the guide portion 123, and due to the action of the reset unit, the spindle 300 pushes the locking tongue 400 out, so that the locking tongue 400 moves outwardly below the guide portion 123.

[0077] In this embodiment, in order to make the lock tongue 400 return smoothly when the lock is closed, an inclined tongue pressing surface 401 is arranged on the upper end surface of the lock tongue 400, and the outer end of the tongue pressing surface 401 is lower than the bottom of the unlocking end of the guide part 123.

[0078] With specific reference Figure 7 As shown in the figure, the thickened wall 130 is arranged near the two ends of the guide part 123 in the inner circle of the knob 120, and a gap is left between the thickened wall 130 and the two ends of the guide part 123 to form a groove, the unlocking groove a is formed on the unlocking end side of the guide part 123, and the locking groove b is formed on the locking end side of the guide part 123.

[0079] When the lock is closed, the lock tongue 400 needs to slide from the unlocking groove a to the locking groove b along the guide part 123, and when the lock tongue 400 is in the unlocking groove a, the upper end surface of the lock tongue 400 is basically not higher than the lower end surface of the unlocking end of the guide part 123. Therefore, in this embodiment, the tongue pressing surface 401 is arranged on the upper end surface of the lock tongue 400, and when the lock tongue 400 is in the unlocking groove a, the tongue pressing surface 401 is located near the guide part 123. The tongue pressing surface 401 is inclined, and the outer end is lower than the inner end in height, which ensures that the lock tongue 400 can enter below the guide part 123 and slide along the guide part 123 to achieve the closing of the lock.

[0080] In the unlocking process, when the lock tongue 400 slides below the guide part 123, the gap between the lower end surface of the guide part 123 and the lock tongue 400 gradually increases; in the locking process, as the lock tongue 400 slides, the height of the lower end surface of the guide part 123 decreases. Since the lock tongue 400 is always located below the guide part 123, the lower end surface of the guide part 123 will press the lock tongue 400, causing the lock tongue 400 to move downward.

[0081] In order to ensure the contact between the lock tongue 400 and the guide part 123, a movable lock tongue 400 needs to be arranged, and in this embodiment, the specific implementation for solving this problem is that: the end of the mandrel 300 is provided with a lock tongue holder 310, and the lock tongue 400 is arranged in the lock tongue holder 310, and the front end extends out of the lock tongue holder 310.

[0082] A resilient top holding piece 2 is arranged between the bottom of the lock tongue 400 and the lock tongue holder 310.

[0083] In the unlocking process, the gap between the lower end surface of the guide part 123 and the lock tongue 400 gradually increases, at this time, the resilient top holding piece 2 lifts the lock tongue 400 upward, so that the upper end surface of the lock tongue 400 is always in contact with the lower end surface of the guide part 123, and remains in the abutting state;

[0084] During the locking process, the lower end of the guide part 123 presses against the bolt 400, causing the bolt 400 to move downward and press down the elastic support member 2. When the bolt 400 slides out of the guide part 123 and enters the position below the unlocking groove a, the pressure of the lower end of the guide part 123 against the bolt 400 disappears, the elastic support member 2 resets, and pushes the bolt 400 upward, so that the bolt 400 enters the locking groove b, completing the locking state of the entire combination lock.

[0085] It should be noted that in this embodiment, the highest position that the elastic support member 2 can lift the latch 400 to, that is, the height of the latch 400 in the unlocking groove a, is the position where the upper end surface of the latch 400 is not higher than the lower end surface of the guide part 123.

[0086] Preferably, in this embodiment, the elastic support member 2 is a spring.

[0087] At the same time, refer to Figure 10 As shown, a short shaft 3 in a vertical direction is provided in the locking tongue 400 frame 310. The locking tongue 400 is movably mounted on the short shaft 3, and a spring is sleeved on the short shaft 3 and located below the locking tongue 400.

[0088] In this embodiment, the first driving unit 122 is provided with a proximity region 122.1 and a contact region 122.2 in sequence; when the first driving unit 122 is driven by the proximity region 122.1, the pawl 610 approaches the zero-return cam 500; when the first driving unit 122 is driven by the contact region 122.2, the pawl 610 and the surface of the zero-return cam 500 come into contact and drive the zero-return cam 500 to rotate.

[0089] Specifically, refer to Figure 3 As shown, in this embodiment, the panel 110 and the fixing base 130 are fixed, and the knob 120 is disposed between the panel 110 and the fixing base 130. The knob 120 is an annular shell, and a drive plate 121 is provided at the end of the annular shell located on one side of the fixing base 130. A connecting post 124 is provided on the back of the drive plate 121 and connected to the locking piece 1, so that the knob 120 drives the locking piece to rotate. The drive plate 121 is provided with an arc-shaped limiting groove 124, and a guide post 4 is provided on the fixing base 130 and inserted into the limiting groove 124, so that the knob 120 can only rotate within the angular range of the limiting groove 124.

[0090] Reference Figure 4 As shown, the first driving part 122 is disposed inside the driving plate 121 and is a protrusion; the end face near the region 122.1 is an inclined surface, and the highest point is connected to the contact region 122.2, which is a plane; at the same time, there is a distant region 122.3 on the other side of the contact region 122.2, which is opposite to the region near the region 122.1.

[0091] When the knob 120 rotates, the first driving part 122 is driven to rotate; when the first driving part 122 rotates to the position corresponding to the pawl 610, the first driving shaft 620 first contacts the approaching area 122.1 and climbs along the inclined surface of the approaching area 122.1, so that the pawl 610 rotates; after the first driving shaft 620 reaches the top end of the approaching area 122.1, the pawl 610 contacts the zero-reset cam 500 and exerts pressure on the surface of the cam; at this time, the knob 120 continues to rotate, the first driving shaft 620 slides along the contact area 122.2, that is, the pawl 610 is always pressed against the zero-reset cam 500; in this process, the zero-reset cam 500 rotates to the zero-reset position; with the continuous rotation of the knob 120, the first driving shaft 620 reaches the end of the contact area 122.2 and moves downward along the inclined surface of the moving-away area 122.3, and the pawl 610 gradually separates from the zero-reset cam 500.

[0092] In the embodiment, the pawl 610 is arranged on a driving rod 630, and the first driving shaft 620 is arranged on the driving rod 630; the driving rod 630 is further provided with a spring pawl 640 and a second driving shaft 650 for driving the spring pawl 640 to move, and the shell assembly 100 is provided with a second driving part 125 which can move with the second driving shaft 650.

[0093] Preferably, the first driving part 122 and the second driving part 125 are arranged in a staggered manner.

[0094] Referring to Figures 4-6 The second driving part 125 is also arranged on the inner side of the driving plate 121 and arranged in a staggered manner with the first driving part 122. In the embodiment, the first driving part 122 and the second driving part 125 are both arranged in an arc shape along the rotation path, the second driving part 125 is provided with a spring pawl area 125.1 and an idling area 125.2 along the rotation direction, the upper end surface of the spring pawl area 125.1 is a horizontal surface, the upper end surface of the idling area 125.2 is an inclined surface, and the inclined direction is opposite to that of the approaching area 122.1 on the first driving part 122. The position of the idling area 125.2 and the position of the approaching area 122.1 are on the same radial line.

[0095] In the embodiment, the spring pawl 640 and the pawl 610 are arranged on the same driving rod 630, which can be arranged in an integral manner or one of the pawl parts can be combined by a plug-in connection or other connection manner.

[0096] In the initial position, the second driving shaft 650 is in contact with the elastic click region 125.1 of the second driving part 125, so that the elastic click pawl 640 is in contact with the dial 210, and when the dial 210 rotates, the elastic click pawl 640 jumps, and the user can feel the elastic click force; as the knob 120 rotates, the second driving shaft 650 slides along the elastic click region 125.1 to the end of the elastic click region 125.1 and enters the idling region 125.2, at this time, the second driving shaft 650 reaches the bottom end of the approaching region; in the process of the second driving shaft 650 sliding down along the slope of the idling region 125.2, the first driving shaft 620 climbs along the slope of the approaching region, so as to realize the swing of the pawl 610 and the elastic click pawl 640.

[0097] In the embodiment, the side of the dial 210 is provided with an elastic click ring 211, the elastic click ring 211 is provided with an elastic click groove 211.1 capable of cooperating with the elastic click pawl 640, the elastic click groove 211.1 is an arc-shaped groove, the position of the elastic click groove 211.1 is consistent with the number on the dial 210, and when the dial 210 rotates, the elastic click pawl 640 slides from one arc-shaped groove to the next arc-shaped groove, so as to jump.

[0098] Through the above arrangement, the pawl 610 can be reset under the action of the second driving shaft 650 after being activated, and is away from the zero reset cam 500, so that the reset structure is omitted; meanwhile, in the zero reset process, the elastic click pawl 610 is separated from the dial 210, so that the dial 210 reduces the resistance in the zero reset process, and a relatively secret zero reset action can be realized.

[0099] In order to enable the user to find back after forgetting the password, the embodiment further comprises,

[0100] The code searching assembly 700 comprises a lock cylinder 710, a driving part 720 and a code searching key 730 connected in sequence;

[0101] The code searching key 730 comprises a code searching pawl 731 and a code searching shaft 733 arranged at corresponding positions on a code searching rod 732; the driving part 720 pulls the code searching shaft 733 outward, the code searching rod 732 rotates, and the code searching pawl 731 approaches the dial set 200.

[0102] Specifically, referring to Figure 8 As shown in the figure, the lock cylinder 710 is unlocked and rotated by a key, drives the driving part 720 to move in the rotating process, the driving part 720 contacts the code searching key 730, drives the code searching key 730 to rotate, so that the code searching pawl 731 on the code searching key 730 approaches and contacts the dial set 200, and the code searching is performed.

[0103] The embodiment can only be blamed for the reset spring 8 between the code shaft 733 and the lock core 710. When the lock core 710 is rotated and reset, the code shaft 733 is not driven by the driving part 720, and the reset spring 8 pushes the code shaft 733 out, so that the code key 730 rotates, and the code claw 731 is separated from the wheel 210 group 200.

[0104] The wheel 210 group 200 is provided with a code circle 230 protruding from the wheel 210, and the periphery of the code circle 230 is provided with a code groove 231, which cooperates with the code claw 731. The code claw 731 is clamped into the code groove 231, and the wheel 210 group 200 is locked.

[0105] Preferably, in the embodiment, one end of the driving part 720 is fixed to the lock core 710, and the other end is a hook part which hooks the code shaft 733.

[0106] When the lock core 710 rotates, one end of the driving part 720 is driven, and the driving part 720 rotates around the axis 300 of the lock core 710. Thus, the hook part also rotates around the axis of the lock core 710, hooks the code shaft 733 on the code key 730 and pulls it towards the lock core 710 side, so that the whole code key 730 rotates around the axis of the code rod 732, thereby making the code claw 731 close to the wheel 210 group 200.

[0107] In the embodiment, in order to increase the code changing function of the password lock, the core shaft 300 is also provided with a code changing tongue 800, the code changing tongue 800 is arranged at the same end as the lock tongue 400, and the shell assembly 100 is provided with a corresponding code changing groove c;

[0108] The wheel group 200 includes a plurality of wheels 210 indicating numbers in the circumferential direction, which are sleeved on the core shaft 300. The inner circle of the wheel 210 and the core shaft 300 are provided with a wheel core 220, and the wheel 210 and the wheel core 220 are connected by a key groove type.

[0109] The other end of the core shaft 300 is provided with a push block 9 and a second spring 6 to tightly push the wheel core 220 at the end of the code changing tongue 800.

[0110] Specifically, the code changing tongue 800 is located above the lock tongue 400, and extends a code changing block to the frame of the lock tongue 400. The wheel core 220 closest to the end of the code changing tongue 800 is in contact with the end face of the code changing block.

[0111] In the inner circle of the knob 120, the code changing groove c is located on the locking side of the locking groove b, and the auxiliary groove d is provided below the code changing groove c and at the same height as the locking groove b, which is used to accommodate the lock tongue 400.

[0112] The tail of the mandrel 300 is also provided with a first spring 10 for supporting the mandrel 300.

[0113] In this embodiment, referring to Figure 11 As shown in the figure, in order to support and limit the mandrel 300, the code rod 732 and the driving rod 630, the shell assembly 100 is provided with a dial holder 7, and the mandrel 300, the code rod 732 and the driving rod 630 are all arranged in the rotating groove of the dial holder 7 and rotate in the rotating groove.

[0114] The code rod 732 and the driving rod 630 are arranged on both sides, and the elastic pawl 640 and the code pawl 731 are located on both sides of the dial set 200, and the pawl 610 is located below the dial set, which is a reasonable layout and makes full use of the space in the shell assembly 100, so that the whole password lock is compact and exquisite.

[0115] The use principle of this embodiment is as follows:

[0116] Locking: referring to Figure 9 The lock tongue 400 is located in the locking groove, the dial set 200 is in a random code state, and the mandrel 300 cannot move relative to the dial set 200, so the lock tongue 400 cannot be separated from the locking groove, and the knob 120 cannot be rotated;

[0117] At the same time, in this state, the elastic pawl 640 is in contact with the elastic pawl groove 211.1, and the dial 210 can bounce when it rotates;

[0118] Unlocking: the dial 210 is pushed to the correct number, at this time, the dial set 200 and the mandrel 300 are unlocked, the mandrel 300 can move relative to the dial set 200, the knob 120 is rotated, the thickened wall 130 on the side of the locking groove b pushes the lock tongue 400 to produce a pushing force, and the lock tongue 400 pushes the mandrel 300 to retreat together; when the knob 120 rotates, the lock piece 1 is driven to move, so that the lock piece 1 and the door lock or the cabinet lock are unlocked;

[0119] Resetting: in the rotating process of the knob 120, the first driving part 122 on the knob 120 plate is driven to rotate, and when the first driving part 122 rotates to the position corresponding to the pawl 610, the first driving shaft 620 first contacts the approaching area 122.1 and climbs along the inclined surface of the approaching area 122.1, so that the pawl 610 rotates;

[0120] In the climbing process of the first driving shaft 620, the second driving shaft 650 slides down along the idling area 125.2, so that the elastic pawl 640 moves away from the elastic pawl ring 211;

[0121] When the first driving shaft 620 reaches the top end of the approaching area 122.1, the pawl 610 contacts the reset cam 500 and exerts pressure on the surface of the reset cam 500. At this time, the knob 120 continues to rotate, the first driving shaft 620 slides along the contact area 122.2, that is, the pawl 610 is always pressed against the reset cam 500, and in this process, the reset cam 500 rotates to the reset position; as the knob 120 continues to rotate, the first driving shaft 620 reaches the end of the contact area 122.2 and moves downward along the slope away from the area 122.3, and the pawl 610 gradually separates from the reset cam 500;

[0122] Locking: reverse rotation of the knob 120, the lock tongue 400 slides reversely relative to the knob 120, and in the sliding process, the lock tongue 400 is always below the guide portion 123 and abuts against the guide portion 123. When the lock tongue 400 slides out of the guide portion 123 and enters below the locking groove b, the elastic top holder 2 lifts the lock tongue 400 upward, so that the lock tongue 400 enters the locking groove b and returns to the locking state;

[0123] Code changing: when the password lock is in the locking state, reverse rotation of the knob 120, the lock tongue 400 reversely rotates into the auxiliary groove d in the knob 120, and the code changing tongue 800 enters the code changing groove c. At this time, the top holding force of the second spring 6 at the end of the spindle 300 on the push block 9 pushes the wheel core 220 out of the wheel 210 in turn, so that the key groove connection between the wheel core 220 and the wheel 210 is disconnected. At this time, the wheel 210 is rotated, the password is set, and then the knob 120 is rotated to the locking position. The thickened wall 130 between the locking groove b and the code changing groove c pushes the code changing tongue 800 back, and at the same time, the wheel core 220 is retracted into the wheel 210 and connected with the wheel 210, completing the code changing;

[0124] Code searching: insert the key into the lock core 710 to unlock, rotate the lock core 710, the lock core 710 drives the code searching key 730 to rotate, the code searching key 730 pulls the code searching shaft 733 outward in the rotating process, so that the code searching rod 732 rotates, and the code searching claw 731 on the code searching rod 732 rotates toward the side of the wheel 210 and approaches the wheel 210; when the code searching claw 731 contacts the code searching ring 230 on the side of the wheel 210, the wheel 210 is rotated, the code searching claw 731 contacts and exerts pressure on the code searching ring 230; when the correct number is reached, the end of the code searching claw 731 is inserted into the code searching groove 231, and the wheel 210 cannot be rotated any more, and the code searching is completed.

[0125] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to make equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical solutions of the present application. Any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still falls within the scope of the technical solutions of the present application.

Claims

1. A rotary combination lock capable of automatically clearing codes, comprising: The housing assembly includes a housing with an internal installation space, consisting of a panel, a knob, and a mounting base; the back of the housing assembly is provided with a latch, which is rotated by the knob to lock with the door cabinet; A type wheel unit; comprising multiple type wheel groups and a spindle passing through the center of the type wheel groups; the end of the spindle is provided with a locking tongue, and the inner ring wall of the knob is provided with a mating part corresponding to the locking tongue; The zero-return unit includes a zero-return cam and a pawl. The zero-return cam is disposed on the character wheel assembly and rotates with the character wheel assembly. The pawl is driven by the housing assembly and approaches and contacts the driving zero-return cam. The zero-return cam is provided with a zero-return part and a driving part. When the pawl contacts the driving part, it drives the zero-return cam to rotate; when the pawl contacts the zero-return part, it locks the zero-return cam. The pawl is provided with a first drive shaft, and the housing assembly is provided with a first drive part capable of driving the first drive shaft to move; the first drive part drives the pawl to approach and contact the zero-return cam, thereby driving the zero-return cam to rotate back to zero. The mating part includes a guide portion disposed on the inner ring of the knob, and the two ends of the guide portion are respectively provided with a locking groove and an unlocking groove; the locking tongue moves along the guide portion and engages with the locking groove and the unlocking groove, so that the digit wheel unit has a locked state and an unlocked state; The locking tongue has a first stroke and a second stroke on the guide portion; In the first stroke, the latch at least partially contacts the inner surface of the guide and moves along the inner surface; After the digit wheel group returns to zero, the latch enters the second stroke, and the latch is located below the guide and in contact with the lower end face of the guide; The guide portion is an arc-shaped protrusion provided along the circumferential direction on the inner ring of the knob, and the locking groove and the unlocking groove are connected to the two ends of the arc-shaped protrusion; The distance between the lower end face of the guide and the fixed seat gradually increases in the direction from the locking groove to the unlocking groove; The first driving unit is provided with a proximity area and a contact area in sequence; when the first driving unit is driven by the proximity area, the pawl approaches the zero-return cam; when the first driving unit is driven by the contact area, the pawl contacts the surface of the zero-return cam and drives the zero-return cam to rotate. The pawl is mounted on a drive rod, and the first drive shaft is located on the drive rod; the drive rod is also provided with a spring-loaded pawl and a second drive shaft for driving the spring-loaded pawl to move, and the housing assembly is provided with a second drive part that can move with the second drive shaft; The first driving unit and the second driving unit are misaligned.

2. The rotary combination lock with automatic code clearing capability according to claim 1, characterized in that: The upper surface of the latch is provided with an inclined pressing surface, and the outer end of the pressing surface is lower than the bottom of the unlocking end of the guide portion.

3. The rotary combination lock with automatic code clearing capability according to claim 1, characterized in that: The end of the spindle is provided with a locking tongue bracket, the locking tongue is disposed inside the locking tongue bracket, and the front end extends out of the locking tongue bracket; An elastic support member is provided between the bottom of the latch and the latch frame.

4. The rotary combination lock with automatic code clearing capability according to claim 1, characterized in that: It also includes, The code-finding assembly includes a lock cylinder, a drive component, and a code-finding key connected in sequence. The code-finding key includes a code-finding claw and a code-finding shaft located at corresponding positions on the code-finding lever; the driving component pulls the code-finding shaft outward, causing the code-finding lever to rotate and bringing the code-finding claw closer to the character wheel assembly.

5. The rotary combination lock with automatic code clearing capability according to claim 4, characterized in that: One end of the drive component is fixed to the lock cylinder, and the other end is a hook that hooks the code-finding shaft.

6. The rotary combination lock with automatic code clearing capability according to claim 1, characterized in that: The spindle is also provided with a code-changing tongue, which is located at the same end as the lock tongue, and the outer shell assembly is provided with a corresponding code-changing slot. The character wheel assembly includes a plurality of character wheels that are sleeved on the spindle and marked with numbers in the circumferential direction. A character wheel core is provided between the inner ring of the character wheel and the spindle, and the character wheel and the character wheel core are connected by a keyway. The other end of the spindle is provided with a push block and a second spring to press the character wheel core tightly against the end of the code change tongue.

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