Double-password word wheel mechanism

Abstract

The present invention discloses a word wheel mechanism with double passwords, which includes a password shaft, a password seat, a word wheel assembly, a stop block and a return spring; the password seat is provided with a plurality of word wheel grooves, and word wheel assemblies are arranged in the word wheel grooves; the password shaft is slidably connected to the password seat and penetrates through the word wheel assembly; a locking convex block is arranged on the password shaft, and the locking convex block corresponds to the word wheel assembly; the word wheel assembly includes a word wheel, a bushing and an inner sleeve; the bushing is sleeved on the password shaft, and an unlocking groove for the locking convex block to slide is arranged on its inner wall, and a bushing convex part is arranged on the circumferential surface; the word wheel and the inner sleeve are both sleeved on the bushing; the word wheel is circumferentially limited with the bushing, and the word wheel and the inner sleeve are elastically coupled to each other; the inner sleeve is provided with an inner sleeve notch; the stop block can move axially and is provided with a convex arm corresponding to the word wheel assembly; the convex arm penetrates into the password seat and is provided with a stop block convex part corresponding to the inner sleeve notch and a stop block blocking part corresponding to the bushing convex part; the return spring acts on the stop block so that the stop block does not contact the inner sleeve. The present invention sets double passwords for unlocking and retrieving passwords respectively.

Description

Technical Field

[0001] The present invention relates to the technical field of password locks, and particularly to a word wheel mechanism with dual passwords. Background Art

[0002] A word wheel password lock is a pure mechanical lock, but it can combine the convenience of an electronic password lock and the stability of a key mechanical lock, and has a wide range of applications in the market. The operation of a word wheel password lock is unique. Whenever a word wheel is toggled to rotate to a pre-set number, one digit of the password is input. Repeating this operation for other word wheels until the last digit of the password is input, the lock can be opened.

[0003] Existing word wheel password locks are opened by a set of pre-set passwords. However, when the user forgets the password, the lock cannot be opened normally and can only be opened by external force, which may cause damage to the lock and make it unusable again. The user needs to replace the new lock, which is costly, laborious and time-consuming. Some word wheel password locks are equipped with an emergency lock cylinder and can be opened emergently with a key. However, using the key can only open the lock and cannot retrieve the pre-set password. When using the lock subsequently, the key has to be used to open the lock, losing the superiority of the password lock.

[0004] In existing improved technologies, the methods for retrieving the password of a password lock include using a probe assembly and a plug-in structure. For the former, the probe assembly is inserted into the lock body of the password lock, and then the elastic expansion and contraction of the probe is realized through the spring in the probe assembly to find the password. This operation is troublesome and the internal structure of the lock becomes more complex. For the latter, an administrator key is inserted to find the password, so a lock cylinder structure matching the administrator key needs to be added to the structure of the lock, which will also make the structure of the lock more complex and the volume bloated. Summary of the Invention

[0005] The purpose of the present invention is to provide a word wheel mechanism with dual passwords, which is set with a common password and an administrative password. The common password is used to open the lock, and the administrative password is used to retrieve the common password, and the product structure is simpler and the code searching efficiency is higher.

[0006] To achieve the above object, the solution of the present invention is:

[0007] A double-password character wheel mechanism, comprising a code shaft, a code seat, a character wheel assembly, a stopper and a reset spring; the code seat is provided with a plurality of parallel character wheel grooves; a group of character wheel assemblies are provided in each character wheel groove; the code shaft is slidably engaged with the code seat and sequentially penetrates each character wheel assembly; a plurality of locking protrusions are provided on the axial direction of the code shaft, each locking protrusion corresponds to a group of character wheel assemblies; the character wheel assembly comprises a character wheel, a bushing and an inner sleeve; the bushing is rotatably engaged with the code shaft, and an unlocking groove for sliding engagement of the locking protrusion is provided on its inner wall, and a bushing convex portion is provided on its peripheral surface ; The character wheel and the inner sleeve are both sleeved on the bushing; the character wheel and the bushing are circumferentially limited, and there is an elastic coupling relationship between the character wheel and the inner sleeve; the inner sleeve is provided with an inner sleeve notch; the stopper can move axially parallel to the password axis, and is provided with a convex arm corresponding to the character wheel assembly; the convex arm is penetrated by the password seat, and is provided with a stopper protrusion located on the circumferential track of the inner sleeve notch, and a stopper stopper located on the circumferential track of the bushing protrusion; the reset spring acts on the stopper to reset the stopper to a state where it is not in contact with the inner sleeve.

[0008] The character wheel mechanism further comprises a code-finding knob; the code-finding knob is in transmission connection with the stopper, so that when the code-finding knob rotates, the stopper is pushed to move axially.

[0009] Preferably, a first slope and a second slope are respectively provided on the opposite surfaces of the stopper and the code-finding knob; the first slope abuts against the second slope to achieve a transmission connection between the code-finding knob and the stopper.

[0010] A character wheel matching portion and an inner sleeve elastic portion are respectively arranged between the inner annular surface of the character wheel and the outer circumferential surface of the inner sleeve, and the character wheel matching portion is elastically coupled with the inner sleeve elastic portion.

[0011] Preferably, a coaxial bushing hole and an inner sleeve hole are provided on the axis of the character wheel, and the bushing hole is circumferentially limited on the circumferential surface of the bushing; the inner sleeve is movably fitted in the inner sleeve hole, and the side wall of the inner sleeve hole is provided with the ratchet teeth; a plurality of bushing grooves are provided at equal angles on the side wall of the bushing hole; at least one limiting protrusion is provided on the circumferential surface of the bushing, and the limiting protrusion is embedded in the bushing groove.

[0012] The character wheel grooves are arranged at equal width intervals along the axial direction of the password seat.

[0013] The first retaining ring and the second retaining ring are respectively installed at both ends of the password seat; the two ends of the password shaft are respectively circumferentially limited and penetrated through the first retaining ring and the second retaining ring; the two ends of the locking spring respectively abut against the second retaining ring and the end of the password shaft.

[0014] Preferably, the word wheel mechanism further includes a cage sleeved on the password shaft, and a code-changing spring sleeved on the second retaining ring; the first retaining ring and the second retaining ring are cooperatively arranged at both outer ends of the cage, and the bushings at both ends of the word wheel assembly respectively abut against both inner ends of the cage; both ends of the code-changing spring respectively abut against the second retaining ring and the end of the cage, and the elastic force of the code-changing spring enables the cage to push the first retaining ring to abut against the circumferential surface of the locking mechanism; a relief groove for the active cooperation of the first retaining ring is arranged on the circumferential surface of the locking mechanism.

[0015] The word wheel mechanism further includes an upper locking spring, and the upper locking spring acts on the password shaft to keep the locking lug disengaged from the bushing.

[0016] A first magnet is embedded on the password shaft, and a second magnet is embedded on each word wheel, and the first magnet and the second magnet are magnetically coupled; the word wheel mechanism further includes a rotation-stopping component acting on the word wheel, and the rotation-stopping component unlocks the rotation-stopping of the word wheel after unlocking, so that the word wheel is reset under the action of the first magnet and the second magnet.

[0017] After adopting the above technical solution, the present invention has the following technical effects:

[0018] ① By arranging an inner sleeve in the word wheel, the inner sleeve and the word wheel are movably cooperated through the coupling relationship between the ratchet teeth and the inner sleeve spring arms; when the blocking convex part of the block is embedded in the inner sleeve notch, the inner sleeve is restricted from rotating, and at this time the word wheel can only rotate in one direction, so as to drive the bushing to rotate until the bushing convex part abuts against the blocking part of the block, thereby achieving the purpose of finding the common password.

[0019] ② The double-password word wheel mechanism including the common password and the management password does not need to additionally design an emergency lock core mechanism or a code-searching mechanism, the structure design of the lock is simpler, the cost is lower, and the common password can be quickly retrieved by inputting the management password, which is easy to operate and has high efficiency. Description of the Drawings

[0020] Figure 1 It is an exploded view of a specific embodiment of the present invention;

[0021] Figure 2 It is a three-dimensional view of the switch knob of a specific embodiment of the present invention;

[0022] Figure 3 It is a three-dimensional view of the rotating sleeve of a specific embodiment of the present invention;

[0023] Figure 4 It is a three-dimensional view of the first embodiment of the word wheel of a specific embodiment of the present invention;

[0024] Figure 5Front view of the first embodiment of the character wheel in the specific embodiment of the present invention;

[0025] Figure 6 Stereogram of the first embodiment of the inner sleeve in the specific embodiment of the present invention;

[0026] Figure 7 Stereogram of the second embodiment of the character wheel in the specific embodiment of the present invention;

[0027] Figure 8 Front view of the second embodiment of the character wheel in the specific embodiment of the present invention;

[0028] Figure 9 Stereogram of the second embodiment of the inner sleeve in the specific embodiment of the present invention;

[0029] Figure 10 Stereogram of the bushing in the specific embodiment of the present invention;

[0030] Figure 11 Stereogram of the password shaft in the specific embodiment of the present invention;

[0031] Figure 12 Stereogram of the stop block in the specific embodiment of the present invention;

[0032] Figure 13 Stereogram of the code-seeking knob in the specific embodiment of the present invention;

[0033] Figure 14 Stereogram of the baffle in the specific embodiment of the present invention;

[0034] Figure 15 Stereogram of the rotation-stop block in the specific embodiment of the present invention;

[0035] Figure 16 Cross-section view of the locked state in the specific embodiment of the present invention Figure 1 ;

[0036] Figure 17 Cross-section view of the locked state in the specific embodiment of the present invention Figure 2 ;

[0037] Figure 18 Cross-section view of the code-seeking state in the specific embodiment of the present invention Figure 1 ;

[0038] Figure 19 Cross-section view of the code-seeking state in the specific embodiment of the present invention Figure 2 ;

[0039] Figure 20 Cross-section view of the code-changing state in the specific embodiment of the present invention;

[0040] Explanation of the reference numerals in the drawings:

[0041] 1 ---- Lock body;

[0042] 11---Lock seat; 111--Mounting hole; 112--Mounting slot;

[0043] 113--locking groove; 12---cover plate; 121--movable hole;

[0044] 122--Word wheel hole; 13---Screw; 14---Anti-drilling sheet;

[0045] 2----Locking mechanism;

[0046] 21---switch knob; 211--limiting groove; 212--insertion column;

[0047] 213--movable slot; 213a-large opening; 213b-small opening;

[0048] 214--giving groove; 22---swivel sleeve; 221--swivel sleeve convex part;

[0049] 221a-high point; 221b-low point; 221c-transition line segment;

[0050] 222--jack; 223--guide hole; 224--push block;

[0051] 23---locking shaft; 231--locking shaft protrusion; 232--guide shaft;

[0052] 24---unlocking spring; 25---lock tongue; 251--lock tongue protrusion;

[0053] 252--Guide ramp; 26---Insert; 27---Let go spring;

[0054] 28---Snap ring;

[0055] 3----Word wheel mechanism;

[0056] 31---password shaft; 311--locking protrusion; 312--first magnet;

[0057] 32---password seat; 321--character wheel groove; 33---character wheel assembly;

[0058] 331--character wheel; 3311-character wheel matching part; 3312-bushing hole;

[0059] 3313-inner sleeve hole; 3314-sleeve embedding groove; 3315-second magnet;

[0060] 3316- anti-rotation groove; 332- bushing; 3321- unlocking groove;

[0061] 3322 - bushing convex part; 3323 - limit projection; 333 - inner sleeve

[0062] 3331 - inner sleeve notch; 3332 - inner sleeve elastic part; 34 - stop block

[0063] 341 - convex arm; 342 - stop block convex part; 343 - stop block blocking part

[0064] 344 - first ramp; 35 - locking spring; 36 - first retaining ring

[0065] 37 - second retaining ring; 38 - cage; 39 - code change spring

[0066] 310 - return spring; 320 - code search knob; 3201 - second ramp

[0067] 330 - anti - rotation assembly; 3301 - anti - rotation spring; 3302 - anti - rotation block

[0068] 33021 - second inclined plane; 3303 - baffle; 33031 - inclined convex block

[0069] 33032 - first inclined plane; 3304 - locking spring Detailed implementation mode

[0070] In order to further explain the technical solution of the present invention, the present invention will be elaborated in detail through specific embodiments below.

[0071] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0072] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of the present invention to be protected.

[0073] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0074] In the description of the embodiments of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the embodiments of the present invention and simplifies the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0075] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0076] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0078] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0079] In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0080] Reference Figures 1 to 20 As shown, the present invention discloses a password lock, which includes a lock body 1, and a locking mechanism 2 and a word wheel mechanism 3 provided on the lock body 1;

[0081] The locking mechanism 2 and the word wheel mechanism 3 cooperate with each other to realize the locking and unlocking functions of the password lock;

[0082] The locking mechanism 2 is rotationally matched with the lock body 1 and has a locked state and an unlocked state: when the locking mechanism 2 rotates, it can be switched between the locked state and the unlocked state;

[0083] The word wheel mechanism 3 includes a password shaft 31, and the password shaft 31 is disposed opposite to the circumferential surface of the locking mechanism 2 for restricting the rotation of the locking mechanism 2 so that the locking mechanism 2 maintains the locked state; when the user inputs the correct common password on the word wheel mechanism 3, the password shaft 31 can move axially and has no restrictive effect on the rotation of the locking mechanism 2, so that the locking mechanism 2 can be switched between the locked state and the unlocked state.

[0084] The following shows specific embodiments of the present invention, mainly disclosing the specific structures of the lock body 1, the locking mechanism 2 and the word wheel mechanism 3.

[0085] The specific structure of the above-mentioned lock body 1 is as follows:

[0086] The above-mentioned lock body 1 includes a lock base 11 and a cover plate 12 that are mutually covered; the lock base 11 is provided with an installation hole 111 for installing the locking mechanism 2 and an installation groove 112 for installing the word wheel mechanism 3. The installation hole 111 and the installation groove 112 are arranged in parallel and partially communicate, and the communicating part is for the password shaft 31 to pass through; the cover plate 12 is respectively provided with a movable hole 121 and a plurality of word wheel holes 122 corresponding to the installation hole 111 and the installation groove 112.

[0087] Furthermore, the above-mentioned lock base 11 is also provided with a locking groove 113 disposed opposite to the installation hole 111, and the locking groove 113 is used for placing the object to be locked; the locking mechanism 2 acts on the locking groove 113 to realize the locking and unlocking of the lock.

[0088] Secondly, the tail end of the above-mentioned cover plate 12 is locked to the lock base 11 by screws 13 to realize the relative fixation of the lock base 11 and the cover plate 12.

[0089] Furthermore, an anti-drilling piece 14 is provided on the inner side of the above-mentioned cover plate 12 to improve the anti-violent opening performance of the word wheel mechanism 3.

[0090] The specific structure of the above-mentioned locking mechanism 2 is as follows:

[0091] The above-mentioned locking mechanism 2 includes a switch knob 21, a rotating sleeve 22, a locking shaft 23 and an unlocking spring 24;

[0092] The switch knob 21 is coaxially connected to the rotating sleeve 22 and is rotatably fitted in the lock body 1 (i.e., the above-mentioned mounting hole 111). When the switch knob 21 rotates, it can drive the rotating sleeve 22 to rotate synchronously;

[0093] A limiting groove 211 is provided on the circumferential surface of the switch knob 21 and is disposed opposite to the password shaft 31 of the character wheel mechanism 3. When the password shaft 31 is inserted into the limiting groove 211, the switch knob 21 cannot rotate, that is, the entire locking mechanism 2 cannot rotate;

[0094] The locking shaft 23 is rotatably fitted in the rotating sleeve 22;

[0095] A rotating sleeve convex portion 221 is provided on the inner wall of the rotating sleeve 22. The rotating sleeve convex portion 221 is provided with a high point 221a and a low point 221b, and a transition line segment 221c is connected between the high point 221a and the low point 221b;

[0096] A locking shaft convex portion 231 is provided on the circumferential surface of the locking shaft 23 and is disposed opposite to the rotating sleeve convex portion 221;

[0097] The unlocking spring 24 is disposed in the lock body 1 (i.e., the above-mentioned mounting hole 111) and acts on the locking shaft 23;

[0098] Under the elastic force of the unlocking spring 24, the locking shaft convex portion 231 abuts against the rotating sleeve convex portion 221, so that when the rotating sleeve 22 rotates, the locking shaft 23 can smoothly move between the high point 221a and the low point 221b of the rotating sleeve convex portion 221 through the locking shaft convex portion 231, realizing the telescopic movement of the end portion of the locking shaft 23 in the above-mentioned locking groove 113. Thus, the locking mechanism 2 can be switched between the locked state and the unlocked state through the telescopic movement of the locking shaft 23.

[0099] The above-mentioned locking mechanism 2 pushes the locking shaft 23 towards the rotating sleeve 22 through the unlocking spring 24, and through the active cooperation between the rotating sleeve convex portion 221 of the rotating sleeve 22 and the locking shaft convex portion 231 of the locking shaft 23, during the rotation of the rotating sleeve 22, the locking shaft 23 only needs a relatively small force to perform telescopic movement to switch the locked state and the unlocked state of the locking mechanism 2. The user only needs to use a relatively small force to rotate the switch knob 21 to drive the rotating sleeve 22 to rotate and make the locking shaft convex portion 231 disengage from the low point 221b of the rotating sleeve convex portion 221. The force of the locking shaft convex portion 231 abutting against the transition line segment 221c will be converted into a circumferential driving force for driving the rotation of the rotating sleeve 22. Finally, the user only needs to use a relatively small force to rotate the switch knob 21 to unlock the lock, and the operation is more labor-saving, and the unlocking process is smoother and more convenient.

[0100] In some embodiments of the above-mentioned locking mechanism 2, a plugging structure is provided on the opposite surfaces of the switch knob 21 and the rotating sleeve 22. The separate design of the switch knob 21 and the rotating sleeve 22 facilitates the production and assembly of product components, and the coaxial connection can be achieved between the two through the plugging structure, enabling the switch knob 21 to drive the rotating sleeve 22 to rotate synchronously.

[0101] Further, the plugging structure includes a plurality of plug posts 212 provided on the end face of the switch knob 21, and a plurality of plug holes 222 provided on the end face of the rotating sleeve 22 and matching the plug posts.

[0102] In some embodiments of the above-mentioned locking mechanism 2, a guiding hole 223 is provided on the axis of the rotating sleeve 22. One end of the locking shaft 23 facing the guiding hole 223 is a guiding shaft 232, and the guiding shaft 232 is inserted into the guiding hole 223 to maintain the axial movement of the locking shaft 23 within the rotating sleeve 22 and improve the functional stability of the locking shaft 23.

[0103] In some embodiments of the above-mentioned locking mechanism 2, the locking mechanism 2 further includes a locking tongue 25 provided in the above-mentioned limiting groove 211; the end of the password shaft 31 acts on the locking tongue 25 to achieve the anti-rotation function of the locking mechanism 2.

[0104] Further, refer to Figure 1 and Figure 17As shown, the above-mentioned locking mechanism 2 further includes an insert block 26 and a yielding spring 27; an activity groove 213 communicating with the limiting groove 211 is provided on the circumferential surface of the switch knob 21; both ends of the activity groove 213 are respectively a large opening 213a and a small opening 213b; the locking tongue 25 is movably fitted in the activity groove 213, and a locking tongue convex part 251 penetrating through the small opening 213b is provided, and a guiding inclined surface 252 is provided on the upper locking side (the rotation direction when the switch knob 21 is locked) of the locking tongue convex part 251; the insert block 26 is fixedly connected at the large opening 213a; the yielding spring 27 is arranged between the locking tongue 25 and the insert block 26, so that the locking tongue 25 is kept in abutment against the inner side of the small opening 213b, so that the locking tongue convex part 251 protrudes from the small opening 213b for the password shaft 31 to cooperate. Under the guiding action of the activity groove 213, the elastic force of the yielding spring 27 enables the locking tongue 25 to maintain the state where its locking tongue convex part 251 protrudes, so as to contact the end part of the password shaft 31 during the rotation of the switch knob 21, realizing the anti-rotation function of the password shaft 31 on the locking tongue 25 and the switch knob 21; however, a situation needs to be considered. When the display password of the word wheel mechanism 3 is disrupted when the switch knob 21 rotates to the unlocked state, the password shaft 31 cannot move axially anymore. At this time, if the switch knob 21 is rotated to the locked state, the problem that the locking tongue 25 contacts the end part of the password seat 31 and cannot be reset to the locked state (that is, cannot be locked) will occur. After the cooperation mode of the locking tongue 25 is improved in the manner described in this paragraph, because the guiding inclined surface 252 is provided on the locking tongue convex part 251, when the password shaft 31 contacts the guiding inclined surface 252, the locking tongue 25 will be gradually squeezed back into the activity groove 213 during the rotation of the switch knob 21, so that the end part of the password shaft 31 can cross over the locking tongue convex part 251, that is, the switch knob 21 can be rotated to the locked state.

[0105] Meanwhile, the above-mentioned locking mechanism 2 further includes a C-shaped snap ring 28 sleeved on the circumferential surface of the switch knob 21 near one end of the rotating sleeve 22, which is used for axially limiting the switch knob 21 to prevent the switch knob 21 from disengaging from the lock body 1 (that is, the activity hole 121 of the above-mentioned cover plate 12), realizing the axial fixation of the switch knob 21 on the lock body 1.

[0106] The specific structure of the above-mentioned word wheel mechanism 3 is as follows:

[0107] The above-mentioned word wheel mechanism 3 is a double-password word wheel mechanism, and a common password and a management password are set at the same time. The common password is used for unlocking, and the management password is used to retrieve the common password when the user forgets the common password (that is, the common password is the "unlocking password" and the management password is the "code-searching password").

[0108] The above-mentioned word wheel mechanism 3 includes a password shaft 31, a password seat 32, a word wheel assembly 33, a stop block 34 and a locking spring 35;

[0109] The password seat 32 is provided with a plurality of parallel character wheel grooves 321; each character wheel groove 321 is provided with a set of character wheel components 33;

[0110] The password shaft 31 is slidably matched with the password seat 32 and passes through each character wheel assembly 33 in sequence; a plurality of locking protrusions 311 are arranged on the axial direction of the password shaft 31, and each locking protrusion 311 corresponds to a group of character wheel assemblies 33;

[0111] The character wheel assembly 33 includes a character wheel 331, a bushing 332 and an inner sleeve 333; the bushing 332 is rotatably engaged with the password shaft 31, and the inner wall thereof is provided with an unlocking groove 3321 for sliding engagement with the locking protrusion 311, and the peripheral surface is provided with a bushing protrusion 3322; the character wheel 331 and the inner sleeve 333 are both sleeved on the bushing 332; the character wheel 331 and the bushing 332 are circumferentially limited, and there is an elastic coupling relationship between the character wheel 331 and the inner sleeve 333, and the inner sleeve 333 can rotate synchronously with the character wheel 331 in a non-restricted state, that is, when the character wheel 331 is turned, the bushing 332 and the inner sleeve 333 both rotate synchronously; the inner sleeve 333 is provided with an inner sleeve notch 3331;

[0112] The stopper 34 can move axially parallel to the password shaft 31, and is provided with a convex arm 341 corresponding to the character wheel assembly 33; the convex arm 341 is penetrated through the password seat 32, and is provided with a stopper protrusion 342 located on the circumferential track of the inner sleeve notch 3331, and a stopper stopper 343 located on the circumferential track of the bushing protrusion 3322: when the management password is input into the character wheel mechanism 3 and the stopper 34 moves axially, the stopper protrusion 342 is embedded in the inner sleeve notch 3331 to stop the inner sleeve 333 from rotating, and when the character wheel 331 drives the bushing 333 to rotate and the bushing protrusion 3322 abuts against the stopper stopper 343, the number displayed on the character wheel 331 is the set common password;

[0113] The locking spring 35 acts on the password shaft 31 to keep the locking protrusion 311 away from the bushing 332, that is, the password shaft 31 is in a locked state.

[0114] The above-mentioned character wheel mechanism 3 is achieved by arranging an inner sleeve 333 in the character wheel 331, and the inner sleeve 333 and the character wheel 331 are movablely matched through an elastic coupling relationship; when the block protrusion 342 of the stop block 34 is embedded in the inner sleeve notch 3331, the inner sleeve 333 is restricted from rotating, and the character wheel 331 can only rotate in one direction at this time, thereby driving the bushing 332 to rotate until the bushing protrusion 3322 abuts against the block stopper 343, thereby achieving the purpose of finding the common password; the dual-password character wheel mechanism 3 including the common password and the management password does not need to design an additional emergency lock core mechanism or code-finding mechanism, the structural design of the lock is simpler and the cost is lower, and the common password can be quickly retrieved by entering the management password, which is easy to operate and efficient.

[0115] In some embodiments of the above-mentioned digit wheel mechanism 3, a digit wheel mating portion 3311 and an inner sleeve elastic portion 3332 are respectively provided between the inner ring surface of the digit wheel 331 and the outer peripheral surface of the inner sleeve 333 to achieve elastic coupling therebetween. Specifically, there are at least the following two mating methods: one is that the digit wheel mating portion 3311 is a ratchet tooth and the inner sleeve elastic portion 3332 is a spring arm. When searching for the code (that is, when the inner sleeve 333 is stopped from rotating), the digit wheel 331 can only rotate unidirectionally (clockwise) to search for the common password, which can avoid invalid operations; the other is that the digit wheel mating portion 3311 is a card slot and the inner sleeve elastic portion 3332 is an elastic protrusion. When searching for the code, the digit wheel 331 can rotate bidirectionally, but only when rotating clockwise can it search for the common password. The two only differ in the specific structure and operation, but both have the basis for realizing the code search function.

[0116] Further, a coaxial bushing hole 3312 and an inner sleeve hole 3313 are provided on the axis of the digit wheel 331. The bushing hole 3312 is sleeved on the circumferential surface of the bushing 332 with circumferential limit; the inner sleeve 333 is movably fitted in the inner sleeve hole 3313, and the side wall of the inner sleeve hole 3313 is provided with the above-mentioned digit wheel mating portion 3311.

[0117] Secondly, a plurality of bushing slots 3314 are provided on the side wall of the bushing hole 3312 at equal angular intervals; at least one limit protrusion 3323 is provided on the circumferential surface of the bushing 332, and the limit protrusion 3323 is embedded in the bushing slot 3314. The mating angle of the limit protrusion 3323 in the bushing hole 3312 (that is, the relative angle with the digit wheel 331) determines the common password corresponding to the group of digit wheel assemblies 33. When the user turns the digit wheel 331, the bushing 332 will be driven to rotate to input the common password. Of course, when the stop block 34 does not limit the inner sleeve 333, the digit wheel 331 can drive the inner sleeve 333 to rotate synchronously, and turning the digit wheel 331 is also inputting the management password. In the following related structures, when the bushing 332 is separated from the digit wheel 331, there is no longer a circumferential limit relationship between the two. At this time, the common password can be changed by first turning the digit wheel 331 and then nesting the bushing 332 with the digit wheel 331.

[0118] In some embodiments of the above-mentioned digit wheel mechanism 3, the digit wheel grooves 321 are arranged at equal angular intervals along the axial direction of the password seat 32 to enable the digit wheel assemblies 33 to be arranged equidistantly on the password seat 32.

[0119] In some embodiments of the above-mentioned character wheel mechanism 3, the first retaining ring 36 and the second retaining ring 37 are respectively installed at both ends of the above-mentioned password seat 32; the two ends of the password shaft 31 are respectively circumferentially limited and penetrated through the first retaining ring 36 and the second retaining ring 37, so that the password shaft 31 can only move axially and will not rotate due to external force, thereby improving the functional stability of the password shaft 31; the two ends of the locking spring 35 respectively abut the end of the second retaining ring 37 and the password shaft 31, and the elastic force of the locking spring 35 causes the password shaft 31 to move axially in the direction of the first retaining ring 36, so that the password shaft 31 is in a locked state.

[0120] Furthermore, the above-mentioned character wheel mechanism 3 also includes a retaining frame 38 sleeved on the password shaft 31, and a code-changing spring 39 sleeved on the second retaining ring 37; the first retaining ring 36 and the second retaining ring 37 are matched at the two ends of the outer side of the retaining frame 38, and the bushings 332 at the two ends of the character wheel assembly 33 respectively abut the two ends of the inner side of the retaining frame 38; the two ends of the code-changing spring 39 respectively abut the ends of the second retaining ring 37 and the retaining frame 38, and the elastic force of the code-changing spring 39 makes the retaining frame 38 push the first retaining ring 36 to abut on the peripheral surface of the locking mechanism 2 (that is, the above-mentioned switch knob 21); the peripheral surface of the locking mechanism 2 (switch knob 21) is provided with a clearance groove 214 for the first retaining ring 36 to flexibly cooperate with. Figure 20 As shown, after the correct common password is input, the switch knob 21 can be rotated in the opposite direction (opposite to the unlocking direction) to a certain angle (such as 60° in this embodiment) so that the clearance groove 214 is opposite to the first retaining ring 36. Then, under the action of the code change spring 39, the retaining frame 38, the bushing 332 and the first retaining ring 36 move in the direction of the locking mechanism 2. After the first retaining ring 36 is embedded in the clearance groove 214, the retaining frame 38 pushes the bushing 332 and disengages it from the character wheel 331. At this time, the character wheel 331 can be rotated to set the common password, and then the switch knob 21 is rotated until it is reset. The switch knob 21 pushes back the first retaining ring 36, the retaining frame 38 and the bushing 332, and the bushing 332 is coupled with the character wheel 331 to complete the replacement of the common password.

[0121] In some embodiments of the above-mentioned wheel mechanism 3, the above-mentioned wheel mechanism 3 also includes a reset spring 310; the reset spring 310 is arranged in the lock body 1 and acts on the stopper 34 to reset the stopper 34 to a state where it is not in contact with the inner sleeve 333, that is, the stopper protrusion 342 withdraws from the inner sleeve notch 3331, and the stopper 34 has no anti-rotation function on the inner sleeve 333.

[0122] In some embodiments of the above-mentioned wheel mechanism 3, the above-mentioned wheel mechanism 3 also includes a code-finding knob 320; the code-finding knob 320 is rotatably engaged with the lock body 1 and is transmission-connected with the stopper 34. When the code-finding knob 320 rotates, it pushes the stopper 34 to move axially, thereby realizing the function of finding a common password (see the working principle below for details).

[0123] Furthermore, the first slope 344 and the second slope 3201 are respectively provided on the opposite surfaces of the above-mentioned stopper 34 and the code-finding knob 320; under the action of the above-mentioned reset spring 310, the first slope 344 always abuts against the second slope 3201, so when the code-finding knob 320 is rotated, the code-finding knob 320 can transfer the torque to the first slope 344 through the second slope 3201 and convert it into an axial driving force of the stopper 34, so that the stopper 34 performs an axial movement parallel to the password axis 31 at the bottom of the password seat 32.

[0124] In some embodiments of the above-mentioned character wheel mechanism 3, a first magnet 312 is embedded on the above-mentioned password shaft 31, and a second magnet 3315 is embedded on each character wheel 331. Through the magnetic attraction between the first magnet 312 and the second magnet 3315, the character wheel 311 can automatically rotate to achieve automatic resetting of the currently displayed password to avoid password leakage.

[0125] Further, refer to Figure 1 , Figure 4 , Figure 14 and Figure 15 As shown, the above-mentioned character wheel mechanism 3 also includes a rotation-stopping assembly 330 acting on the character wheel 331. The elastic rotation-stopping assembly 330 has a rotation-stopping block 3302 that is extended and retracted by the rotation-stopping spring 3301, a baffle 3303 for movably limiting the rotation-stopping block 3302, and a locking spring 3304; a plurality of rotation-stopping grooves 3316 are arranged on the surface of the character wheel 331, and the rotation-stopping block 3302 is sequentially penetrated through the baffle 3303 and the bottom of the password seat 32 and abuts against the surface of the character wheel 331 under the action of the rotation-stopping spring 3301, and cooperates with the rotation-stopping groove 3316 for movably limiting after the character wheel 331 rotates, so as to realize the rotation-stopping function after the user turns the character wheel 331, and keep the current turning. The baffle 3303 is driven by the rotation of the locking mechanism 2 to move axially. For example, a push block 224 is provided on the circumferential surface of the rotating sleeve 22. After unlocking, the locking mechanism 2 rotates and causes the push block 224 to push the baffle 3303. The baffle 3303 pushes the anti-rotation block 3302 to compress the anti-rotation spring 3301, thereby realizing that the anti-rotation block 3302 is disengaged from the anti-rotation groove 3316. The character wheel 331 can be reset under the action of the first magnet 312 and the second magnet 3315 to realize the function of "automatically scrambling after unlocking"; the locking spring 3304 is used to drive the baffle 3303 to reset so that the anti-rotation spring 3301 can drive the anti-rotation block 3302 to embed into the anti-rotation groove 3316.

[0126] Secondly, one end of the above-mentioned baffle 3303 is provided with an inclined convex block 33031 for the push block 224 to come into active contact; at the same time, a first inclined surface 33032 and a second inclined surface 33021 with a sliding fit are arranged at the contact position between the baffle 3303 and the anti-rotation block 3302, so that the baffle 3303 can push and press the anti-rotation block 3302 more smoothly.

[0127] The working principle of the present invention is as follows:

[0128] ① Locked state:

[0129] Due to the elastic force of the locking spring 35, the password shaft 31 protrudes from the wheel mechanism 3 and inserts into the locking mechanism 2 under normal conditions, that is, the end of the password shaft 31 inserts into the limit groove 211 and is in active cooperation with the locking tongue protrusion 251 of the locking tongue 25. When in the locked state, the password of the wheel mechanism 3 is scrambled (not the correct ordinary password), and the password shaft 31 cannot be retracted. Therefore, when the switch knob 21 is rotated, it cannot be rotated because the locking tongue protrusion 251 abuts against the end of the password shaft 31, so that the lock remains in the locked state.

[0130] ② Unlocking process:

[0131] When the wheels 331 of each wheel assembly 33 are toggled to the ordinary password, the wheels 331 drive the bushings 332 to rotate, so that the unlocking grooves 3321 of the bushings 332 are aligned with the locking protrusions 311 on the password shaft 31. At this time, if the password shaft 31 is stressed, it can compress the locking spring 35 and retract. Therefore, when the switch knob 21 is rotated, the locking tongue 25 will push aside the password shaft 31 to rotate from the locked state to the unlocked state; while the switch knob 21 is rotated, the rotating sleeve 22 rotates synchronously, so that the relative angle between the rotating sleeve protrusion 221 in the rotating sleeve 22 and the locking shaft protrusion 231 of the locking shaft 23 changes. Under the elastic force of the unlocking spring 24, the locking shaft protrusion 231 of the locking shaft 23 moves from the low point 221b to the high point 221a along the transition line segment 221c, so that the locking shaft 23 moves axially towards the direction of the switch knob 21, thereby gradually withdrawing the locking shaft 23 from the locking groove 113 to complete the unlocking of the lock.

[0132] ③ Finding the ordinary password:

[0133] Refer to Figure 18 and Figure 19 As shown, when finding the ordinary password, first input the management password so that the inner sleeve notch 3331 of each inner sleeve 333 is opposite to the block protrusion 342 of the block 34; then rotate the code-searching knob 320, and the code-searching knob 320 drives the block 34 to move axially, so that the block protrusion 342 is embedded in the inner sleeve notch 3332 to fix the inner sleeve 333. At this time, due to the coupling of the wheel mating portion 3311 (ratchet teeth) and the inner sleeve elastic portion 3332 (elastic arm) restricting the rotation of the wheel 331, the wheel 331 can only rotate clockwise (toFigure 18 , 19 in the clockwise direction in 19 ); the user rotates the digit wheel 331 until the lug 3322 of the bushing 332 abuts against the stop portion 343 of the stop block 34, and the digit wheel 331 cannot be rotated any further and stops. At this time, the numbers displayed on each digit wheel 331 are the common password.

[0134] ④ Changing the common password:

[0135] Enter the correct common password, rotate the switch knob 21 counterclockwise by 60°, so that the relief groove 214 faces the first retaining ring 36. Then, under the action of the code-changing spring 39, the cage 38, the bushing 332 and the first retaining ring 36 move towards the switch knob 21. After the first retaining ring 36 is inserted into the relief groove 214, the cage 38 pushes the bushing 332 and disengages it from the digit wheel 331. At this time, the digit wheel 331 can be rotated to set the common password. Then rotate the switch knob 21 back to its reset position, and the switch knob 21 pushes the first retaining ring 36, the cage 38 and the bushing 332 back, and the bushing 332 is coupled with the digit wheel 331, completing the change of the common password.

[0136] ⑤ Changing the management password:

[0137] Enter the correct common password, rotate the switch knob 21 counterclockwise by 60°, so that the relief groove 214 faces the first retaining ring 36. Then, under the action of the code-changing spring 39, the cage 38, the bushing 332 and the first retaining ring 36 move towards the switch knob 21. After the first retaining ring 36 is inserted into the relief groove 214, the cage 38 pushes the bushing 332 and disengages it from the digit wheel 331; then rotate the digit wheel 331 to enter the management password, rotate the code-seeking knob 320 to drive the stop block 34 to move, and the lug 342 on the stop block 34 is inserted into the inner sleeve notch 3331 to fix it. At this time, the digit wheel 331 can be rotated to set the management password; finally, rotate the code-seeking knob 320 and the switch knob 21 back, and the switch knob 21 pushes the first retaining ring 36, the cage 38 and the bushing 332 back, and the bushing 332 is coupled with the digit wheel 331, completing the change of the management password.

[0138] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by those of ordinary skill in the art shall be regarded as not departing from the patent scope of the present invention.

Claims

1. A double-password word wheel mechanism, Features: It includes a password shaft, a password seat, a character wheel assembly, a stopper and a reset spring; The password seat is provided with a plurality of parallel character wheel grooves; each character wheel groove is provided with a group of character wheel components; The password shaft is slidably matched with the password seat and passes through each character wheel assembly in sequence; a plurality of locking protrusions are arranged on the axial direction of the password shaft, and each locking protrusion corresponds to a group of character wheel assemblies; The character wheel assembly comprises a character wheel, a bushing and an inner sleeve; the bushing is rotatably fitted on the password shaft, and its inner wall is provided with an unlocking groove for slidingly fitting the locking protrusion, and its peripheral surface is provided with a bushing protrusion; the character wheel and the inner sleeve are both sleeved on the bushing; the character wheel and the bushing are circumferentially limited, and there is an elastic coupling relationship between the character wheel and the inner sleeve, and the inner sleeve is provided with an inner sleeve notch; The stopper can move axially parallel to the password shaft and is provided with a convex arm corresponding to the character wheel assembly; the convex arm is penetrated through the password seat and is provided with a stopper convex portion located on the circumferential track of the inner sleeve notch and a stopper portion located on the circumferential track of the bushing convex portion; The return spring acts on the stopper to return the stopper to a state where the stopper is not in contact with the inner sleeve.

2. The double-code word wheel mechanism according to claim 1, Features: The character wheel mechanism further comprises a code-finding knob; the code-finding knob is in transmission connection with the stopper, so that when the code-finding knob rotates, the stopper is pushed to move axially.

3. The double-code word wheel mechanism according to claim 2, Features: A first slope and a second slope are respectively arranged on opposite surfaces of the stopper and the code-finding knob; the first slope abuts against the second slope to achieve transmission connection between the code-finding knob and the stopper.

4. The double-code word wheel mechanism according to claim 1, Features: A character wheel matching portion and an inner sleeve elastic portion are respectively arranged between the inner annular surface of the character wheel and the outer circumferential surface of the inner sleeve, and the character wheel matching portion is elastically coupled with the inner sleeve elastic portion.

5. The double-code word wheel mechanism according to claim 4, Features: A coaxial bushing hole and an inner sleeve hole are provided on the axis of the character wheel; the bushing hole is circumferentially limited on the circumferential surface of the bushing; the inner sleeve is movably fitted in the inner sleeve hole, and the side wall of the inner sleeve hole is provided with ratchet teeth; a plurality of bushing grooves are provided on the side wall of the bushing hole at equal angles; at least one limiting protrusion is provided on the circumferential surface of the bushing, and the limiting protrusion is embedded in the bushing groove.

6. The double-code word wheel mechanism according to claim 1, Features: The character wheel grooves are arranged at equal width intervals along the axial direction of the password seat.

7. The double-code character wheel mechanism according to claim 1, Features: The character wheel mechanism further comprises a locking spring, which acts on the password shaft to keep the locking protrusion in a state of being separated from the bushing.

8. The double-code word wheel mechanism according to claim 7, Features: A first retaining ring and a second retaining ring are respectively installed at two ends of the password base; two ends of the password shaft are respectively inserted through the first retaining ring and the second retaining ring in a circumferentially limited manner; two ends of the locking spring respectively abut against the second retaining ring and the end of the password shaft.

9. The two-password word wheel mechanism according to claim 8, characterized in that: The word wheel mechanism further includes a cage sleeved on the password shaft and a code-changing spring sleeved on the second retaining ring; the first retaining ring and the second retaining ring are cooperatively arranged at two outer ends of the cage, and bushings at two ends of the word wheel assembly respectively abut against two inner ends of the cage; two ends of the code-changing spring respectively abut against the second retaining ring and the end of the cage, and the elastic force of the code-changing spring enables the cage to push the first retaining ring to abut against the circumferential surface of the locking mechanism of the password lock; a relief groove for the first retaining ring to movably cooperate with is arranged on the circumferential surface of the locking mechanism.

10. The two-password word wheel mechanism according to claim 1, characterized in that: A first magnet is embedded on the password shaft, and a second magnet is embedded on each word wheel, and the first magnet and the second magnet are magnetically coupled; the word wheel mechanism further includes a rotation-stopping component acting on the word wheel, and the rotation-stopping component unlocks the rotation stop of the word wheel after unlocking, so that the word wheel is reset under the action of the first magnet and the second magnet.

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