Double-track type mechanical password metering lock

Abstract

The utility model discloses a double-rail type mechanical password metering lock which comprises a lock body, a lock beam installed on the lock body, a spring bolt installed in a bolt channel, a locking spring arranged between the spring bolt and the lock body, an anti-retreating base body installed in the lock body, and two anti-retreating spring pieces fixedly arranged on the anti-retreating base body and extending downwards into the bolt channel. The lock body is provided with a password wheel assembly pressing the anti-retreating base body downwards, and an elastic delimiting structure is arranged between the anti-retreating base body and the lock body. An unlocking lock cylinder is rotationally installed in the lock body, two unlocking shifting forks extending upwards to the position between the two anti-retreating spring pieces are fixedly arranged on the unlocking lock cylinder, and a first lock rotating structure is arranged between the unlocking lock cylinder and the lock body. Unlocking can be achieved through the unlocking key, when the key is lost or emergency situations occur, unlocking can be achieved by shifting the password wheel assembly to correct passwords, dependence on key loss is low, the influence of the key on the emergency events can be reduced, the whole lock is achieved through a mechanical structure, and the price is low.

Description

Technical Field

[0001] The utility model relates to a lock, in particular to a double-track mechanical password metering lock. Background Art

[0002] In the power sector, in order to protect the safety of power assets, locks are widely used. The metering locks used as metering box closure measures are one of the most common locks. The metering locks are not only used as protective equipment, but also have management functions, which are reflected in the configuration and use of unlocking keys. At present, most power departments adopt the management method of using the same master key in the unit area, such as using the same master key in the same village, the same community, or the same substation. This method is convenient for managers to open and close all metering boxes in the unit area, but there are two obvious problems. First, after the key is lost, the opening of all metering boxes in the unit area becomes a problem, which will lead to the failure to timely discover theft of electricity, destruction and other behaviors, making it difficult to ensure the safety of power assets. Second, in the event of emergency repairs, it is difficult to find the relevant keys in time, so it is often necessary to equip special personnel for on-site unlocking. On-site unlocking will have a more obvious operation process, which will delay the time for emergency repairs. Other locks with low key dependence, such as smart locks, are generally more expensive and are not suitable for large-scale promotion in the field of large numbers of metering boxes. Therefore, it is necessary to propose a metering lock which is low in price, less dependent on key loss and can reduce the impact of keys on emergency events to improve the above situation. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a double-track mechanical password metering lock which has low price, low dependence on key loss and can reduce the influence of keys on emergency events.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a double-track mechanical password metering lock, comprising a lock body, a lock beam is installed on the lock body, a beam channel for inserting and removing the lock beam is provided on the lock body, a tongue channel connected to the lock beam channel is opened on the lock body, a lock tongue is installed in the tongue channel, a locking spring for pushing the lock tongue to lock the lock beam is provided between the lock tongue and the lock body, and a tongue-retracting smooth surface for facilitating the insertion and removal of the lock beam is provided on the lock tongue and / or the lock beam;

[0005] An anti-retraction base is installed in the lock body, and two anti-retraction spring pieces extending downward into the tongue channel are fixedly arranged on the anti-retraction base, and the anti-retraction spring pieces are arranged to limit the lock tongue from being away from the end surface of the lock beam; a password wheel assembly pressing the anti-retraction base downward is installed on the lock body, and the password wheel assembly releases the pressing setting of the anti-retraction base when the correct password is converted, and a release elastic structure for making the anti-retraction spring piece withdraw from the tongue channel is arranged between the anti-retraction base and the lock body;

[0006] A release lock core is rotatably installed in the lock body, and two release forks are fixed on the release lock core and extend upward between the two anti-retraction spring sheets. The release fork is used to prop open the two anti-retraction spring sheets when the release lock core rotates, and a first lock rotation structure is provided between the release lock core and the lock body.

[0007] As a preferred technical solution, the password wheel assembly includes a wheel channel arranged parallel to the tongue channel, a wheel axle is installed in the wheel channel, a plurality of password wheels arranged in an array on the wheel axle are installed on the lock body, a plurality of password marks are evenly distributed on the outer circumference of the password wheel, the outer circumference of the password wheel protrudes from the lock body, and the lock body is provided with a wheel avoidance opening corresponding to the password wheel; an anti-retraction pressure wheel mounted on the wheel axle is respectively installed in the lock body corresponding to each of the password wheels, the anti-retraction pressure wheel can rotate synchronously with the corresponding password wheel, the anti-retraction pressure wheel is used to press the anti-retraction matrix, and the anti-retraction pressure wheel is provided with a decompression notch which does not press the anti-retraction matrix when the password wheel rotates to the correct password.

[0008] As a preferred technical solution, a wheel slot for changing the password is respectively provided on the inner circumferential surface of the password wheel corresponding to each of the password marks, a pressure wheel slot is provided on the inner circumferential surface of the anti-retraction pressure wheel, and a shaft sleeve is rotatably installed at each group of the pressure wheel slots and the wheel slot on the wheel axle, and the shaft sleeve is provided with a holding key that is clamped in the corresponding pressure wheel slot, and the holding key extends to the corresponding wheel slot; each anti-retraction pressure wheel is arranged on the same side of the corresponding password wheel, and a password changing lock cylinder is rotatably installed at one end of the wheel axle on the lock body, and a top shaft protrusion is fixed on the password changing lock cylinder, and the top shaft protrusion pushes the wheel axle to make it slide axially when the password changing lock cylinder rotates, and the holding key withdraws from the wheel slot when the wheel axle slides axially, and a wheel axle reset spring is installed on the other end of the wheel axle on the lock body; a second lock rotation structure is provided between the password changing lock cylinder and the lock body.

[0009] As a preferred technical solution, a pressure transmission roller is respectively installed on the anti-recession base corresponding to each of the anti-recession pressure wheels.

[0010] As a preferred technical solution, the first lock rotation structure includes a first key insertion hole axially arranged on the release lock core, a plurality of core side pin holes penetrating the first key insertion hole are arranged in the axial direction on the outer peripheral surface of the release lock core, and the lock body is provided with shell side pin holes corresponding to the core side pin holes one by one; a core side elastic column is installed in the core side pin hole, and at least two of the core side elastic columns are set with different lengths; a shell side elastic column is installed in the shell side pin hole, and a first lock rotation spring is installed between the shell side elastic column and the shell side pin hole, and the first lock rotation spring pushes the shell side elastic column between the core side pin hole and the shell side pin hole or into the core side pin hole.

[0011] As a preferred technical solution, a failure ball is installed in at least one of the core-side pin holes at one end of the core-side elastic column close to the shell-side elastic column, and a failure groove for accommodating the failure ball is provided on the outer peripheral surface of the release lock core in the circumferential direction of the core-side pin hole where the failure ball is installed.

[0012] As a preferred technical solution, the release elastic structure includes release spring pieces respectively fixedly arranged on both sides of the anti-retraction base, and the lock body is provided with release force application steps respectively corresponding to the free ends of each of the release spring pieces.

[0013] Due to the adoption of the above technical scheme, the dual-track mechanical password metering lock comprises a lock body, a lock beam is installed on the lock body, a beam channel for inserting and removing the lock beam is provided on the lock body, a tongue channel connected to the lock beam channel is opened on the lock body, a lock tongue is installed in the tongue channel, a locking spring for pushing the lock tongue to lock the lock beam is provided between the lock tongue and the lock body, and a tongue-retracting smooth surface for facilitating the insertion and removal of the lock beam is provided on the lock tongue and / or the lock beam; an anti-retraction base is installed in the lock body, and two anti-retraction spring sheets extending downward into the tongue channel are fixedly provided on the anti-retraction base, and the anti-retraction spring sheets restrict The lock tongue is arranged at the end face away from the lock beam; a password wheel assembly is installed on the lock body to press the anti-retraction base downward, and the password wheel assembly releases the pressing setting of the anti-retraction base when the password is converted to the correct password, and a release elastic structure for making the anti-retraction spring piece withdraw from the tongue channel is provided between the anti-retraction base and the lock body; a release lock core is rotatably installed in the lock body, and two release forks extending upward between the two anti-retraction spring pieces are fixed on the release lock core, and the release fork is used to prop open the two anti-retraction spring pieces when the release lock core rotates, and a first lock rotation structure is provided between the release lock core and the lock body. When the utility model is locked, the two anti-retraction spring pieces are relied on to produce a rigid abutment against the lock tongue, so that the lock beam cannot be disengaged from the lock tongue, so a good locking state can be maintained. When unlocking is required, the unlocking key can be inserted into the release lock core to release the rotational locking effect of the first lock rotation structure, and then the unlocking key can be rotated to make the two release forks spread the two anti-retraction spring sheets and release the abutment between the two anti-retraction spring sheets; the lock body is pulled manually so that the lock beam can be pulled out of the beam channel by squeezing out the lock tongue to achieve unlocking. When the key is lost or an emergency occurs, the password of the password wheel assembly can be obtained, and after the password wheel assembly is dialed to the correct password, the pressure of the password wheel assembly on the anti-retraction base can be released, and the release elastic structure drives the anti-retraction spring sheet to withdraw from the lock tongue position. Similarly, after the lock body is pulled manually, unlocking can be achieved. Accordingly, the utility model has low dependence on key loss and can reduce the impact of keys on emergency events, and the overall mechanical structure is adopted, and the price is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0015] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0016] Figure 2 yes Figure 1 A magnified schematic diagram of the AA structure;

[0017] Figure 3 yes Figure 2 Schematic diagram of the state after all the password wheels are rotated to the correct password;

[0018] Figure 4 yes Figure 1 Schematic diagram of the state in which the lock tongue is squeezed out when the lock beam is pulled out after the password is unlocked;

[0019] Figure 5 yes Figure 4 Schematic diagram of the state where the lock beam is completely pulled out;

[0020] Figure 6 yes Figure 1 A schematic diagram of the structure of the cipher wheel assembly;

[0021] Figure 7 yes Figure 6 Status diagram when changing password;

[0022] Figure 8 yes Figure 1 Schematic diagram of the state when key A is inserted;

[0023] Fig. 9 yes Figure 8 The enlarged schematic diagram of the BB structure in the middle shows the state when the A key is not inserted;

[0024] Fig.10 yes Figure 8 The enlarged diagram of the CC structure in the figure shows the state when the A key is not inserted;

[0025] Fig.11 yes Fig.10 State diagram after inserting key A;

[0026] Fig.12 yes Fig.10 State diagram of the unlocked lock cylinder after rotation;

[0027] Fig.13 yes Fig. 9 A state diagram of the anti-retraction spring piece being stretched open after the limit release lock core rotates;

[0028] Fig.14 yes Figure 1 Schematic diagram of the state when the B key is inserted;

[0029] Fig.15 yes Fig.14 A magnified schematic diagram of the DD structure;

[0030] Fig.16 yes Fig.15 State diagram of the unlocked lock cylinder after rotation;

[0031] Fig.17 yes Fig.16The state diagram of the failure ball falling into the failure groove after the release lock cylinder rotates;

[0032] Fig.18 yes Fig.17 The state diagram after rotation back to the original position.

[0033] In the figure: 1-lock body; 11-beam channel; 12-tongue channel; 13-wheel channel; 2-lock beam; 3-lock tongue; 31-locking spring; 32-tongue smooth surface; 4-anti-retraction base; 41-anti-retraction spring sheet; 42-release elastic structure; 43-pressure transmission roller; 5-code wheel assembly; 51-wheel axle; 52-code rotary wheel; 521-rotor slot; 53-anti-retraction pressure wheel; 531-release notch; 532-pressure wheel slot; 54-holding key; 55-password change lock cylinder; 56-top shaft protrusion; 57-axle return spring; 58-sleeve; 6-unlock lock cylinder; 61-unlock fork; 7-first lock rotation structure; 71-first key insertion hole; 72-core side pin hole; 73-shell side pin hole; 74-core side elastic column; 75-shell side elastic column; 76-first lock rotation spring; 77-disabled ball; 78-disabled slot; 81-A key; 82-B key. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0035] like Figure 1 and Figure 5 As shown, the double-track mechanical password metering lock comprises a lock body 1, a lock beam 2 is mounted on the lock body 1, and a beam channel 11 is provided on the lock body 1 for inserting and removing the lock beam 2. Conventionally, the lock beam 2 is J-shaped, and the short end thereof is inserted into the corresponding beam channel 11 and locked to realize the locking function, and the short end is pulled out of the corresponding beam channel 11 to realize the unlocking function. The above is easy to understand based on the known padlock structure, and will not be repeated here.

[0036] The lock body 1 is provided with a tongue channel 12 connected to the beam channel 11 of the lock beam 2, a lock tongue 3 is installed in the tongue channel 12, and a locking spring 31 is provided between the lock tongue 3 and the lock body 1 for pushing the lock tongue 3 to lock the lock beam 2. The lock tongue 3 is installed in the tongue channel 12 in a sliding manner, which can be easily achieved by clearance fit, etc.; when the lock tongue 3 extends out of the tongue channel 12, it can be clamped in the clamping groove on the short end of the lock beam 2. The locking spring 31 provides a spring force for the lock tongue 3 to extend out of the tongue channel 12. Of course, an extension limiting structure corresponding to the lock tongue 3 is provided in the tongue channel 12 to limit the length of the lock tongue 3 extending out of the tongue channel 12. The extension limiting structure can be achieved by setting a step, etc., which can be easily obtained by those skilled in the art in combination with conventional technical means and the description of this embodiment, and will not be repeated here and is not shown in the figure.

[0037] like Figure 4 As shown, the lock tongue 3 and / or the lock beam 2 are provided with a tongue-retracting smooth surface 32 for facilitating the insertion and extraction of the lock beam 2, so that the lock beam 2 can be inserted and extracted by pushing the lock tongue 3 back into the tongue channel 12. This tongue-retracting smooth surface 32 is a common technical means for converting the force along the axial direction of the lock beam 2 into the force along the axial direction of the lock tongue 3, and its principle is not repeated here. This embodiment is illustrated by providing the tongue-retracting smooth surface 32 on both the lock tongue 3 and the lock beam 2.

[0038] like Figure 1 As shown, an anti-retraction base 4 is installed in the lock body 1, and two anti-retraction spring pieces 41 extending downward into the tongue channel 12 are fixedly arranged on the anti-retraction base 4, and the anti-retraction spring pieces 41 are arranged to limit the lock tongue 3 from being away from the end surface of the lock beam 2. The anti-retraction spring pieces 41 form a rigid restriction on the lock tongue 3 to retreat into the tongue channel 12. Under this rigid restriction, the lock tongue 3 can be reliably kept in the state of extending out of the tongue channel 12, thereby forming a rigid lock on the lock beam 2. In this case, the lock beam 2 cannot be pulled out of the beam channel 11, and the locking is reliable.

[0039] like Figures 1 to 5As shown, the lock body 1 is provided with a code wheel assembly 5 which presses the anti-retraction base 4 downwards. Through this pressing action, the anti-retraction spring piece 41 is kept at the inner end position of the lock tongue 3, that is, the rigid restriction effect of preventing the lock tongue 3 from retreating into the tongue channel 12 is maintained. When the code wheel assembly 5 is converted to a correct password, the pressing setting on the anti-retraction base 4 is released. A release elastic structure 42 for allowing the anti-retraction spring piece 41 to withdraw from the tongue channel 12 is provided between the anti-retraction base 4 and the lock body 1; that is, when the code wheel assembly 5 is converted to a correct password, the elastic force of the release elastic structure 42 will drive the two anti-retraction spring pieces 41 to withdraw from the tongue channel 12 upwards, and the rigid restriction effect on the lock tongue 3 disappears. The lock beam 2 can be pulled out of the beam channel 11 by pushing the lock tongue 3 back into the tongue channel 12 to achieve unlocking. Therefore, by converting the code wheel assembly 5 to a correct password, it becomes a means of unlocking in this embodiment.

[0040] like Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the password wheel assembly 5 of this embodiment includes a wheel channel 13 arranged in parallel with the tongue channel 12, a wheel axle 51 is installed in the wheel channel 13, and a plurality of password wheels 52 arranged on the wheel axle 51 are installed on the lock body 1. A plurality of password marks are evenly distributed on the outer circumference of the password wheel 52, and the password marks can be realized by numbers or letters. The outer circumference of the password wheel 52 protrudes from the lock body 1 so that the staff can dial the password wheel 52 when using it. Of course, the lock body 1 is provided with a wheel avoidance corresponding to the password wheel 52.

[0041] Corresponding to each of the code wheels 52 in the lock body 1, there is respectively installed an anti-retraction pressure wheel 53 sleeved on the wheel shaft 51, and the anti-retraction pressure wheel 53 can rotate synchronously with the corresponding code wheel 52. The anti-retraction pressure wheel 53 is used to press the anti-retraction matrix 4, and the anti-retraction pressure wheel 53 is provided with a decompression notch 531 for not pressing the anti-retraction matrix 4 when the code wheel 52 rotates to the correct code.

[0042] When the password wheel 52 is turned to rotate, the anti-retraction pressure wheel 53 rotates synchronously. When the password wheel 52 is in the wrong password position, the anti-retraction pressure wheel 53 maintains the pressure on the anti-retraction base 4, and the two anti-retraction spring pieces 41 can maintain their rigid restriction effect, and the lock tongue 3 maintains the locking effect. When the password wheel 52 is in the correct password position, the decompression notch 531 on the anti-retraction pressure wheel 53 is in the position of the anti-retraction base 4, and its shape is concave in the outer circumferential surface of the anti-retraction pressure wheel 53, so that the pressure of the anti-retraction pressure wheel 53 on the anti-retraction base 4 disappears; when all the password wheels 52 are in the correct password position, the anti-retraction base 4 is not subject to any pressure, and it can bounce upward under the action of the limit release elastic structure 42, and the two anti-retraction spring pieces 41 release the rigid restriction effect, and the lock tongue 3 can be unlocked.

[0043] like Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the inner circumference of the password wheel 52 is respectively provided with a wheel slot 521 for changing the password corresponding to each of the password marks, and the inner circumference of the anti-retraction pressure wheel 53 is provided with a pressure wheel slot 532, and the wheel axle 51 is rotatably mounted at each group of the pressure wheel slot 532 and the wheel slot 521, and the shaft sleeve 58 is provided with a holding key 54 that is clamped in the corresponding pressure wheel slot 532, and the holding key 54 extends to the corresponding wheel slot 521; each of the anti-retraction pressure wheels 53 is located on the same side of the corresponding password wheel 52. It is arranged that a password changing lock cylinder 55 is rotatably installed at one end of the wheel axle 51 on the lock body 1, and a top shaft protrusion 56 is fixedly provided on the password changing lock cylinder 55. When the password changing lock cylinder 55 rotates, the top shaft protrusion 56 pushes the wheel axle 51 to make it slide axially, and the holding key 54 withdraws from the rotating wheel slot 521 when the wheel axle 51 slides axially, and a wheel axle reset spring 57 is installed on the lock body 1 at the other end of the wheel axle 51; a second lock rotation structure is provided between the password changing lock cylinder 55 and the lock body 1.

[0044] When the password change lock cylinder 55 is locked in the initial position by the second lock rotation structure, the top shaft protrusion 56 does not push the wheel shaft 51, and the holding key 54 is simultaneously held in the corresponding pressure wheel slot 532 and the rotating wheel slot 521, and the anti-retraction pressure wheel 53 can rotate with the corresponding password rotating wheel 52. When the second lock rotation structure is unlocked and the password change lock cylinder 55 rotates, the top shaft protrusion 56 pushes the wheel shaft 51, and the axial movement of the wheel shaft 51 causes the holding key 54 to exit the rotating wheel slot 521, and the password rotating wheel 52 can rotate relative to the anti-retraction pressure wheel 53; through this rotation, the angle relationship between different password marks and the decompression notch 531 on the password rotating wheel 52 can be switched to achieve password change. After replacement, the rotating wheel slot 521 corresponding to the replaced password mark is aligned with the pressure wheel slot 532. After rotating the password replacement lock cylinder 55 and releasing the pushing of the top shaft protrusion 56, the wheel axle 51 slides back under the action of the wheel axle reset spring 57, and the holding key 54 is held in the new rotating wheel slot 521 to complete the password replacement.

[0045] The sleeve 58 can be installed on the axle 51 by only rotating it through clearance fit with the axle 51 and by providing steps corresponding to the two ends of the sleeve 58 on the axle 51. The password wheel 52 is clearance fit with the sleeve 58 to avoid the sleeve 58 from rotating when changing the password. The second locking rotation structure can be implemented by the same principle as the first locking rotation structure 7. For details, please refer to the description of the first locking rotation structure 7 below, which will not be repeated here.

[0046] Preferably, the release elastic structure 42 includes release spring pieces respectively fixedly arranged on both sides of the anti-retraction base 4, and the lock body 1 is provided with release force application steps respectively corresponding to the free ends of each release spring piece, so that the spring piece simplifies the structural setting, so that the anti-retraction base 4, the anti-retraction spring piece 41, and the release spring piece form a whole, and simplify the installation. Preferably, the anti-retraction base 4 is respectively equipped with a pressure transmission roller 43 corresponding to each anti-retraction pressure wheel 53 to reduce the resistance during the rotation of the password wheel 52, while facilitating the password input, reducing the difference in feel between the anti-retraction pressure wheel 53 and the anti-retraction base 4 due to the presence or absence of elastic pressure.

[0047] like Figure 1 , Fig. 9 and Fig.13As shown, a release lock core 6 is rotatably installed in the lock body 1, and two release forks 61 are fixed on the release lock core 6 and extend upward to between the two anti-retraction spring sheets 41. The release forks 61 are used to spread the two anti-retraction spring sheets 41 when the release lock core 6 rotates, and a first lock rotation structure 7 is provided between the release lock core 6 and the lock body 1.

[0048] When the unlocking key is inserted, the rotation locking function of the first lock rotation structure 7 is released, and then after the release lock cylinder 6 is rotated, the two release forks 61 can open the two anti-retraction spring sheets 41, such as Fig.13 As shown, this also releases the rigid restriction effect of the anti-retraction spring piece 41, and the lock tongue 3 can be unlocked. Thus, the use of the unlocking key becomes another means of unlocking in this embodiment.

[0049] like Figure 8 and 10 As shown, the first lock rotation structure 7 includes a first key insertion hole 71 axially arranged on the release lock core 6, a plurality of core side pin holes 72 penetrating the first key insertion hole 71 are arranged in the axial direction on the outer peripheral surface of the release lock core 6, and shell side pin holes 73 corresponding to the core side pin holes 72 are provided on the lock body 1; core side elastic columns 74 are installed in the core side pin holes 72, and at least two core side elastic columns 74 are set with different lengths; shell side elastic columns 75 are installed in the shell side pin holes 73, and a first lock rotation spring 76 is installed between the shell side elastic column 75 and the shell side pin hole 73, and the first lock rotation spring 76 pushes the shell side elastic column 75 between the core side pin hole 72 and the shell side pin hole 73 or into the core side pin hole 72.

[0050] like Fig.10 As shown, when the unlocking key is not inserted, the shell side spring column 75 located between the core side pin hole 72 and the shell side pin hole 73 can play a locking role in the rotation of the unlocking lock core 6. Figure 8 As shown in FIG. 1 , when the unlocking key is inserted, the notches of different heights on the unlocking key cause the corresponding shell-side elastic column 75 to just retreat into the corresponding shell-side pin hole 73, that is, the contact surface of the shell-side elastic column 75 and the core-side elastic column 74 is just at a position that is nearly coplanar with the outer peripheral surface of the unlocking lock core 6, as shown in FIG. Fig.11 As shown, the rotation locking effect of the shell side elastic column 75 on the release lock cylinder 6 disappears, as shown in FIG. Fig.12 As shown, by rotating the unlocking key, the rotation of the unlocking lock cylinder 6 can be realized. The locking and unlocking principle between the unlocking key and the unlocking lock cylinder 6 is easily understood by those skilled in the art based on the known padlock knowledge, and will not be repeated here.

[0051] Preferably, if Figures 8 to 18As shown, a failure ball 77 is installed in at least one of the core-side pin holes 72 at one end of the core-side elastic column 74 close to the shell-side elastic column 75, and a failure groove 78 for accommodating the failure ball 77 is provided on the outer circumferential surface of the release lock core 6 in the circumferential direction of the core-side pin hole 72 where the failure ball 77 is installed. Based on this, multiple unlocking keys can be provided in this embodiment, such as A key 81 and B key 82. When the A key 81 is inserted into the release lock core 6, as shown in FIG. Figure 8 and Fig.10 As shown, the groove thereon can only make the shell side spring column 75 retreat into the shell side pin hole 73, and the failure ball 77 is still in the core side pin hole 72, that is, the contact point between the failure ball 77 and the shell side spring column 75, on the outer circumference of the release lock core 6, the A key 81 can realize the release of the rotation lock function, thereby realizing the overall unlocking function of this embodiment. After the A key 81 is lost, when the B key 82 is inserted into the release lock core 6, as shown in FIG. Fig.14 and Fig.15 As shown, the height of the groove allows the inoperative ball 77 to also retreat into the shell-side elastic column 75, that is, at this time, the contact point between the core-side elastic column 74 and the inoperative ball 77 is on the outer circumference of the release lock cylinder 6, and the B key 82 can also realize the release of the rotation lock function, thereby realizing the overall unlocking function. Fig.16 and 17 As shown, after the B key 82 releases the rotation lock and the release lock core 6 rotates, when the invalid ball 77 rotates to the invalid groove 78, the spring force of the first rotation lock spring 76 will push the invalid ball 77 into the invalid groove 78; after being pushed in, the invalid ball 77 is equivalent to filling the depth of the invalid groove 78, so that the contact point between the shell-side elastic column 75 and the invalid ball 77 can be on the outer peripheral surface of the release lock core 6, and the rotation of the release lock core 6 is not affected. After the subsequent insertion of the B key 82, the core-side elastic column 74 and the shell-side elastic column 75 without the invalid ball 77 can form a contact surface that is almost coplanar with the outer peripheral surface of the release lock core 6, as shown in FIG. Fig.18 As shown, the B key 82 can be used to unlock the door. However, the previously lost A key 81 cannot release the rotation lock and cannot be unlocked because it cannot completely retract the shell-side spring column 75 into the shell-side pin hole 73 after being inserted. Through this arrangement, the B key 82 can be used to unlock the door when the A key 81 is lost, thus avoiding the cost of replacing the lock, and the lost A key 81 cannot be used again, thereby ensuring the safety risk caused by the lost key.

[0052] This embodiment sets dual unlocking by key and password, so that when the key is lost or an emergency occurs, the lock can be unlocked by obtaining the password, which reduces the dependence on key loss and can reduce the impact of the key on emergency events. This embodiment also implements multi-key configuration, so that in the case of losing the A key 81, the B key 82 can still be enabled to unlock, which makes it more convenient to transfer and manage emergency situations without complicating key management. After using this embodiment, the rigid restriction of the anti-retraction spring sheet 41 is released through the previous unlocking means, that is, key unlocking or password unlocking, and the lock body 1 is pushed to make the lock beam 2 enter the beam channel 11, and after squeezing out the lock tongue 3, it is locked again by the lock tongue 3; then the unlocking key is withdrawn or the password is disrupted to complete the relocking operation. This embodiment is implemented as a whole with a mechanical structure and has a low price.

[0053] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A dual-track mechanical password metering lock, comprising a lock body, a lock beam mounted on the lock body, and a beam channel for inserting and removing the lock beam on the lock body, characterized in that: The lock body is provided with a tongue channel connected to the lock beam channel, a lock tongue is installed in the tongue channel, a locking spring for pushing the lock tongue to lock the lock beam is provided between the lock tongue and the lock body, and a tongue-removing smooth surface for facilitating the insertion and extraction of the lock beam is provided on the lock tongue and / or the lock beam; An anti-retraction base is installed in the lock body, and two anti-retraction spring pieces extending downward into the tongue channel are fixedly arranged on the anti-retraction base, and the anti-retraction spring pieces are arranged to limit the lock tongue from being away from the end surface of the lock beam; a password wheel assembly pressing the anti-retraction base downward is installed on the lock body, and the password wheel assembly releases the pressing setting of the anti-retraction base when the correct password is converted, and a release elastic structure for making the anti-retraction spring piece withdraw from the tongue channel is arranged between the anti-retraction base and the lock body; A release lock core is rotatably installed in the lock body, and two release forks are fixed on the release lock core and extend upward between the two anti-retraction spring sheets. The release fork is used to prop open the two anti-retraction spring sheets when the release lock core rotates, and a first lock rotation structure is provided between the release lock core and the lock body.

2. The double-track mechanical password metering lock according to claim 1, characterized in that: The password wheel assembly includes a wheel channel arranged parallel to the tongue channel, a wheel axle is installed in the wheel channel, a plurality of password wheels arranged in an array on the wheel axle are installed on the lock body, a plurality of password marks are evenly distributed on the outer circumference of the password wheel, the outer circumference of the password wheel protrudes from the lock body, and the lock body is provided with a wheel avoidance opening corresponding to the password wheel; an anti-retraction pressure wheel mounted on the wheel axle is respectively installed in the lock body corresponding to each of the password wheels, the anti-retraction pressure wheel can rotate synchronously with the corresponding password wheel, the anti-retraction pressure wheel is used to press the anti-retraction matrix, and the anti-retraction pressure wheel is provided with a decompression notch which does not press the anti-retraction matrix when the password wheel rotates to the correct password.

3. The double-track mechanical password metering lock according to claim 2, characterized in that: The inner circumference of the password wheel is respectively provided with a wheel slot for changing the password corresponding to each of the password marks, the inner circumference of the anti-retraction pressure wheel is provided with a pressure wheel slot, and the wheel axle is rotatably installed at each group of the pressure wheel slots and the wheel slot on the wheel axle, and the axle sleeve is provided with a holding key that is clamped in the corresponding pressure wheel slot, and the holding key extends to the corresponding wheel slot; each anti-retraction pressure wheel is arranged on the same side of the corresponding password wheel, and a password changing lock cylinder is rotatably installed at one end of the wheel axle on the lock body, and a top shaft protrusion is fixed on the password changing lock cylinder, and the top shaft protrusion pushes the wheel axle to make it slide axially when the password changing lock cylinder rotates, and the holding key withdraws from the wheel slot when the wheel axle slides axially, and a wheel axle reset spring is installed on the lock body at the other end of the wheel axle; a second lock rotation structure is provided between the password changing lock cylinder and the lock body.

4. The double-track mechanical password metering lock according to claim 2, characterized in that: The anti-recoil base is provided with pressure transmission rollers corresponding to each of the anti-recoil pressure wheels.

5. The double-track mechanical password metering lock according to claim 1, characterized in that: The first lock rotation structure includes a first key insertion hole axially arranged on the release lock core, a plurality of core side pin holes penetrating the first key insertion hole are arranged in the axial direction on the outer circumferential surface of the release lock core, and the lock body is provided with shell side pin holes corresponding to the core side pin holes one by one; a core side elastic column is installed in the core side pin hole, and at least two of the core side elastic columns are set with different lengths; a shell side elastic column is installed in the shell side pin hole, and a first lock rotation spring is installed between the shell side elastic column and the shell side pin hole, and the first lock rotation spring pushes the shell side elastic column between the core side pin hole and the shell side pin hole or into the core side pin hole.

6. The double-track mechanical password metering lock according to claim 5, characterized in that: A failure ball is installed in at least one of the core-side pin holes at one end of the core-side elastic column close to the shell-side elastic column, and a failure groove for accommodating the failure ball is provided on the outer peripheral surface of the release lock core in the circumferential direction of the core-side pin hole where the failure ball is installed.

7. The double-track mechanical password metering lock according to claim 1, characterized in that: The release elastic structure comprises release spring pieces respectively fixedly arranged on both sides of the anti-retraction base, and the lock body is provided with release force application steps respectively corresponding to the free ends of each of the release spring pieces.

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