Number-variable card inserting lock

Abstract

The utility model relates to the technical field of locks, in particular to a number-variable card-inserting lock, a locking mechanism comprises an inner shell and a supporting seat fixed in the inner shell, and card-inserting grooves for an unlocking card to be inserted are formed in the inner shell and a lock shell; a limiting column and a marble column are arranged in each supporting hole of the supporting seat in a penetrating manner; the locking mechanism further comprises an unlocking assembly installed on the supporting base. The unlocking assembly comprises a locking block, a number changing plate and a push button, a plurality of transition holes are formed in the number changing plate, and middle beads are arranged in part of the transition holes; when the unlocking assembly is in the unlocking position state, the unlocking clamping piece with the coordination hole is inserted, the middle bead in the transition hole aligned with the coordination hole moves into the supporting hole, and after the unlocking assembly is reset to the locking position, the middle bead in the supporting hole moves into other transition holes, number changing is achieved, and the number changing structure is simpler and more ingenious. In addition, the locked object is clamped through the elastic arm in the lock hole, the locking device is suitable for locking an object in a special shape similar to a rope locking head, the structure is simple, production is easy, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, in particular to a card lock with a changeable number. Background Art

[0002] Luggage locks are commonly used locks on suitcases, trolley cases and other luggage. Luggage and luggage are currently closed with zippers, and the zipper head is provided with a keyhole that cooperates with the luggage lock. There is currently a type of luggage lock that is a long lock shell as a whole, with a push block set at one end of the lock shell, a password lock in the middle, and a zipper head insertion opening at the other end. A slider movable part is provided in the lock shell to lock the zipper head. When the password is entered correctly, a push rod in the password lock can slide relative to the lock shell, and the push block pushes the push rod, and the push rod pushes the slider movable part to disengage the slider movable part from the zipper head.

[0003] Most locking mechanisms are code wheel mechanisms and key lock mechanisms, with a small number of them using card-insertion unlocking. For example, the Chinese patent document with announcement number CN202007573U discloses a composite card-insertion luggage lock. When opening a case, the number plate is inserted, and the depth of the engagement between the pressing portion and the keyhole is different to achieve different displacements of the door lock pin, so that the locking rod is exactly moved to the corresponding insertion position. The pin mechanism can drive the paddle to move, and the paddle drives the knob to rotate through the control member. The knob drives the second fork pressing on the top rod to rotate. Pressing the button to press the top rod to move, thereby separating the locking rod from the locking hole on the suitcase and opening the case; inserting a special tool, using the special tool to rotate the lock core, and the lock core drives the lever, which drives the lever to rotate, and the knob drives the second fork pressing on the top rod to rotate. Pressing the button to press the top rod to move, thereby separating the locking rod from the locking hole on the suitcase and opening the case. Through the above two methods, the owner of the case and specific personnel can easily open the case.

[0004] Another example is a composite luggage lock disclosed in Chinese patent publication number CN102747905A. The lock comprises an upper shell and a bottom cover, wherein the upper shell is formed with a card slot and a card hole, and the bottom cover is mounted with a bottom plate. A storage space is formed between the upper shell and the bottom plate, which accommodates: a plurality of card points fixed to the card point slot, which is engaged by a slider that slides with the displacement of the unlocking card; during the sliding process, the slider drives the transmission shaft to move, thereby driving the protrusion of the lock gear switching block to move, thereby rotating the lock gear switching block to achieve the switching between unlocking and locking states; at the same time, the lock gear switching block can also be rotated by a special key. The lock can be opened by using the unlocking card or by rotating the lock cylinder by a special key, providing flexible opening methods to meet specific needs. At the same time, the cooperation of the number-changing card slot, the card points, and the unlocking card can also realize a numbering function.

[0005] The above-mentioned composite luggage lock is aimed at the structure of unlocking by inserting a card. Although numbering can be achieved through the number-changing card slot piece, its structure is complex and the manufacturing cost is high.

[0006] In addition, existing luggage locks are generally provided with a lock hole, in which a lock hook is provided for the zipper piece to be inserted and locked. The lock hook is only suitable for ordinary zipper pieces with holes. For special-shaped column structures (such as lock rope heads), the existing lock hole lock hook cannot lock. Utility Model Content

[0007] In view of all or part of the above technical problems in the prior art, the utility model provides a card lock with a variable number.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] A card lock with a variable number includes a lock housing, a locking mechanism, and a transmission member. The locking mechanism is mounted on the lock housing, and the transmission member is movably mounted on the lock housing and is restricted by the locking mechanism. The transmission member can only be operated to move after the locking mechanism inputs a correct instruction.

[0010] The locking mechanism includes an inner shell and a support seat fixed in the inner shell. The inner shell and the lock shell are provided with a card slot for inserting an external unlocking card.

[0011] The support seat is provided with a plurality of support holes, each of which is provided with a limit column and a pin column. The support seat is provided with a spring that applies force to the limit column, so that the limit column keeps pushing the pin column into the card slot.

[0012] The locking mechanism also includes an unlocking assembly slidably mounted on the support base, and the transmission member can slide together with the unlocking assembly to unlock; the unlocking assembly includes a lock block, a number change plate and a push knob, and the push knob extends out of the lock housing; the limit column is provided with a first locking portion, and the lock block is provided with a second locking portion, and the first locking portion and the second locking portion abut against each other to prevent the unlocking assembly from sliding to unlock;

[0013] The number-changing plate is located at the intersection of the limit column and the pin column. The number-changing plate is provided with multiple transition holes. The number of transition holes is greater than the number of supporting holes. When the unlocking assembly is in the unlocking position and the locking position, the supporting holes are aligned with different transition holes. Intermediate beads are provided in some of the transition holes.

[0014] There is no intermediate bead between the limiting post and the pin post and when the pin post is inserted into the card slot, the first locking portion and the second locking portion abut against each other to lock the card. Inserting an unlocking card into the card slot pushes the pin post and the limiting post to move, so that the first locking portion and the second locking portion are offset and unlocked.

[0015] When there is an intermediate bead between the limiting column and the pin column, the first locking portion and the second locking portion remain staggered;

[0016] When the unlocking assembly is in the unlocking position, insert the unlocking card with the matching hole, align the middle bead in the transition hole of the matching hole and move it to the supporting hole. After the unlocking assembly is reset to the locked position, the middle bead in the supporting hole is transferred to the other transition hole to achieve the number change;

[0017] The lock housing is further provided with a lock hole open to the outside, a lock seat is installed in the lock housing, and the lock seat includes a clamping seat, the clamping seat is provided with a clamping groove aligned with the lock hole, the side wall of the clamping groove is integrally formed with an elastic arm, the inner side of the elastic arm is provided with a clamping protrusion extending toward the clamping groove, and is used to clamp the peripheral locked object placed through the lock hole; the elastic arm is forced to swing away from the clamping groove to release the peripheral locked object;

[0018] A stop seat is also provided at the clamping seat. In the locked state, the stop seat presses against the outer side of the elastic arm to limit its swing; in the unlocked state, the transmission member drives the stop seat to move to release the restriction on the elastic arm.

[0019] As a further optional technical solution, the stop seat can be installed in a liftable manner at the bottom of the holding seat. In the locked state, the transmission member presses against the stop seat and is in a high position; in the unlocked state, the transmission member drives the stop seat to a low position; the movement direction of the transmission member is perpendicular to that of the stop seat, a limiting protrusion is provided on the top of the transmission member, and a yield groove is provided on the bottom of the stop seat. In the unlocked state, the transmission member moves and causes the limiting protrusion to sink into the yield groove, thereby causing the stop seat to descend.

[0020] As a further optional technical solution, the stop seat includes a stop base and a stop stand which are integrated structures with each other. The clamping seat is provided with an avoidance hole located beside the elastic arm, and the stop stand is passed through the avoidance hole; the two clamping grooves are arranged side by side, and the elastic arms are respectively provided on the opposite sides of each clamping groove. There are three stop stands, and the stop stand located in the middle limits one of the elastic arms of the two clamping grooves at the same time.

[0021] As a further optional technical solution, the support seat includes a first seat body and a second seat body that are fixed to each other, and the first seat body, the number changing plate, the second seat body and the locking block are arranged in sequence in a direction away from the card insertion slot.

[0022] As a further optional technical solution, the first seat body and the second seat body are fitted and fixed together, and a storage groove for the number changing plate to slide in is opened between the first seat body and the second seat body, and the length of the ball column is equal to the length of the support hole in the first seat body.

[0023] As a further optional technical solution, the inner shell includes a "["-shaped frame and a locking plate. A guide slide is provided between the ends of the first seat body and the second seat body and the frame body. The locking plate and the frame body jointly lock the first seat body and the second seat body.

[0024] As a further optional technical solution, the support seat is also provided with a position holding column, which is arranged in parallel with the pin column. The position holding column is provided with an outer ring groove, and the number changing plate is provided with a positioning hole for the position holding column to pass through. The positioning hole is a long hole with large ends and a small middle. When the number changing plate is in the locked position or the unlocked position, the outer ring groove and the positioning hole are staggered, and the number changing plate is blocked in the sliding direction. Only after the unlocking card is inserted into the card slot to push the position holding column inward and align the outer ring groove with the positioning hole, can the position holding column's obstruction to the number changing plate in the sliding direction be released.

[0025] As a further optional technical solution, the end of the pin column close to the card slot and the end of the limit column close to the pin column are arc-shaped, the end of the transition hole facing the limit column downward is in the shape of a flared trumpet, the middle bead is cylindrical and has chamfers on both ends.

[0026] As a further optional technical solution, the side wall of the card slot is provided with a curved portion to hinder the smooth insertion of the unlocking card.

[0027] As a further optional technical solution, the push-twist is provided with a key lock core, a convex column is provided at the bottom of the key lock core at a position offset from the center axis, and the transmission part is provided with a long hole perpendicular to the sliding direction, and the convex column is embedded in the long hole so that the transmission part can be driven to slide when the key lock core rotates.

[0028] Beneficial effects of the utility model:

[0029] The utility model discloses a card lock with a changeable number. Compared with the prior art, the number changing structure of the utility model is simpler and more ingenious, thereby reducing manufacturing costs. The locked object is clamped by an elastic arm in the lock hole, and is suitable for locking objects with special shapes such as lock rope ends. The utility model has a simple structure, is easy to produce, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional diagram of the lock in the embodiment.

[0031] Figure 2 2 is a top view of the lock in the embodiment.

[0032] Figure 3 Schematic diagram of the locking mechanism, transmission member and lock seat in the embodiment.

[0033] Figure 4 2 is an exploded view of the lock in the embodiment.

[0034] Figure 5-1 This is a schematic diagram of the locking mechanism in the embodiment when no unlocking card is inserted and the four middle beads are staggered with the pin column.

[0035] Figure 5-2 The locking mechanism in the embodiment is in Figure 5-1 Exploded view of the state shown.

[0036] Figure 5-3 The locking mechanism of the lock in the embodiment is in Figure 5-1 Cross-sectional view of the state shown.

[0037] Figure 5-4 for Figure 5-1 Schematic diagram from another perspective.

[0038] Figure 6-1 This is a schematic diagram of the lock in the embodiment with the unlocking card inserted and the four middle beads staggered with the pin columns.

[0039] Figure 6-2 The locking mechanism is in Figure 6-1 Exploded view of the state shown.

[0040] Figure 6-3 for Figure 6-1 sectional view of .

[0041] Figure 6-4 for Figure 6-1 Schematic diagram of the locking mechanism in the shown state.

[0042] Figure 7-1 For Figure 6-1 Schematic diagram of the unlocking component after it moves further to the unlocking position in the state.

[0043] Figure 7-2 for Figure 7-1 Schematic diagram of the locking mechanism in the closed state, hiding the second seat.

[0044] Figure 8-1 This is a schematic diagram of the unlocking mechanism after the unlocking card with the matching hole is inserted when the unlocking component is in the unlocking position.

[0045] Figure 8-2 for Figure 8-1 Exploded diagram of .

[0046] Figure 8-3 For locks in Figure 8-1 Cross-sectional view of the state.

[0047] Figure 8-4 The locking mechanism is in Figure 8-1 Schematic diagram of the state, hiding the second seat.

[0048] Figure 9-1 For the locking mechanism Figure 8-1 Based on this, a schematic diagram of further unlocking the component moving to the locked position.

[0049] Figure 9-2 for Figure 9-1 Exploded view of the locking mechanism in this state.

[0050] Figure 9-3 for Figure 9-1 Cross-sectional view of the lock in this state.

[0051] Figure 9-4 for Figure 9-1 Schematic diagram of the locking mechanism from another perspective in this state, hiding the second seat.

[0052] Figure 10-1 Schematic diagram of the cooperation between the transmission member, the clamping seat and the stop seat in the embodiment.

[0053] Figure 10-2 for Figure 10-1 Exploded diagram of .

[0054] Figure 10-3 for Figure 10-1 sectional view of .

[0055] Reference numerals:

[0056] Lock housing 1, lock hole 01, extension slot 02;

[0057] Transmission member 2, limiting protrusion 21, matching inclined surface 22, lock seat 300;

[0058] The clamping seat 3, the clamping groove 31, the elastic arm 32, the clamping protrusion 33, and the avoidance hole 34;

[0059] Stop seat 4, yielding groove 41, stop base 42, stop stand 43;

[0060] Locking mechanism 5;

[0061] Inner housing 6, card slot 61, curved portion 611, frame 62, locking plate 63, guide slide 64;

[0062] Support seat 7, supporting hole 71, first seat body 72, second seat body 73, receiving groove 74;

[0063] Limiting column 8, first locking portion 81, ball column 9;

[0064] Unlocking assembly 10, locking block 101, second locking portion 1011; number changing plate 102, transition hole 1021, positioning hole 1022;

[0065] Push and twist 11, middle bead 12;

[0066] Position holding column 13, outer ring groove 131;

[0067] Key lock 14;

[0068] Unlocking card 15 and matching hole 151. DETAILED DESCRIPTION

[0069] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0070] The lock of this embodiment, such as Figures 1 to 9-4 As shown, the lock comprises a lock housing 1, a locking mechanism 5, and a transmission member 2. The locking mechanism 5 is mounted on the lock housing 1, and the transmission member 2 is movably mounted on the lock housing 1 and is restrained by the locking mechanism 5. The transmission member 2 can only be operated to move after the locking mechanism 5 inputs the correct command. The lock housing 1 is provided with a lock hole 01, and a lock seat 300 is provided within the lock hole 01 for clamping the peripheral locked object. When unlocking, the transmission member 2 slides to drive the lock seat 300 to release the restraint on the locked object. The main improvements are:

[0071] The locking mechanism 5 includes an inner shell 6 and a support base 7 fixed in the inner shell 6. The inner shell 6 and the lock shell 1 are provided with a card slot 61 for inserting an external unlocking card 15. The card slot 61 passes through the top of the lock shell 1.

[0072] The support base 7 has eight support holes 71, each of which is penetrated by a limiting post 8 and a pin post 9. A spring (not shown) is provided on the support base 7 to apply force to the limiting post 8, thereby ensuring that the limiting post 8 continues to push the pin post 9 into the card insertion slot 61. The pin post 9 is inserted into the card insertion slot 61 perpendicular to the direction in which the unlocking card 15 is inserted.

[0073] The locking mechanism 5 also includes an unlocking assembly 10 slidably mounted on the support base 7. The transmission member 2 can slide with the unlocking assembly 10 to unlock the door. The unlocking assembly 10 includes a locking block 101, a number change plate 102, and a push knob 11. These three components can slide as a whole relative to the support base 7. The push knob 11 partially extends outside the lock housing 1 for operation to open and close the lock. The rear end of the limit post 8 is provided with a first locking portion 81, and the locking block 101 is provided with a second locking portion 1011. The first locking portion 81 and the second locking portion 1011 abut against each other to prevent the unlocking assembly 10 from sliding to unlock the door.

[0074] The number changing plate 102 is located at the intersection of the limiting column 8 and the ball column 9. The number changing plate 102 has sixteen transition holes 1021. The number of transition holes 1021 is greater than the number of supporting holes 71. When the unlocking assembly 10 is in the unlocking position and the locking position, the supporting holes 71 are aligned with different transition holes 1021. Four of the transition holes 1021 are provided with intermediate beads 12. Figure 5-1 to Figure 5-4As shown, in this state, all the intermediate beads 12 have no corresponding limit posts 8 and pin posts 9, that is, the limit posts 8 all directly press against the pin posts 9. At this time, there are no intermediate beads 12 between the limit posts 8 and the pin posts 9, and the pin posts 9 are inserted into the card slot 61. The first locking portion 81 and the second locking portion 1011 press against each other to lock, and the limit post 8 passes through the transition hole 1021. Therefore, the limit post 8 blocks the lock block 101 and the number change plate 102 at the same time, and the entire unlocking assembly 10 cannot slide to unlock. Figure 6-1 to Figure 6-4 As shown, the unlocking card 15 is inserted into the card slot 61 to push the pin column 9 and the limit column 8 to move. The unlocking card 15 shown in the figure does not have the matching hole 151, so all the pin columns 9 and the limit column 8 can be pushed inward, so that the first locking portion 81 and the second locking portion 1011 can be staggered and unlocked, and the limit column 8 retracts until only the end thereof penetrates the transition hole 1021, so that the limit column 8 no longer blocks the lock block 101 and the number change plate 102. Figure 7-2 and Figure 7-2 As shown, the entire unlocking assembly 10 and the transmission member 2 slide to the unlocking position.

[0075] Continue as Figure 7-1 and Figure 7-2 As shown, when there is an intermediate bead 12 between the limiting column 8 and the ball column 9, the first locking portion 81 and the second locking portion 1011 remain staggered. Figures 8-1 to 8-4 As shown, when the unlocking assembly 10 is kept in the unlocking position, the unlocking card 15 with the matching hole 151 is inserted, and the middle bead 12 in the transition hole 1021 aligned with the matching hole 151 is shifted into the support hole 71. There are two matching holes 151 in the figure, and the head of the ball column 9 is inserted into the corresponding matching hole 151. In this way, the middle bead 12 between the ball column 9 and the limiting column 8 is separated from the transition hole 1021 and enters the support hole 71 under the action of the spring. Figures 9-1 to 9-4 As shown, after the unlocking assembly 10 is reset to the locked position, the middle bead 12 in the supporting hole 71 is transferred to the other transition hole 1021 to achieve the number change.

[0076] During use, the lock is equipped with several unlocking cards 15. If the pin column 9 corresponds to a support hole 71 with an intermediate bead 12, the corresponding stopper 8 does not block the unlocking assembly 10, regardless of whether the corresponding position of the unlocking card 15 has a matching hole 151. However, if the pin column 9 corresponds to a support hole 71 without an intermediate bead 12, the corresponding stopper 8 blocks the unlocking assembly 10, and the corresponding position of the unlocking card 15 must not have a matching hole 151 in order to unlock the lock. Therefore, depending on whether the support hole 71 has an intermediate bead 12, different unlocking cards 15 are configured with or without matching holes 151, enabling unlocking with different unlocking cards 15.

[0077] Specifically, the support base 7 includes a first base body 72 and a second base body 73 fixed to each other. The first base body 72, the number change plate 102, the second base body 73, and the locking block 101 are arranged in sequence in a direction away from the card insertion slot 61. The first base body 72 and the second base body 73 are fixed together, and a receiving groove 74 for the number change plate 102 to slide therein is defined between the first base body 72 and the second base body 73. The length of the ball column 9 is equal to the length of the support hole 71 in the first base body 72, and the length of the intermediate bead 12 is approximately equal to the thickness of the number change plate 102.

[0078] Specifically, the inner shell 6 includes a "["-shaped frame 62 and a locking plate 63. A guide slide 64 is provided between the ends of the first seat 72 and the second seat 73 and the frame 62. The locking plate 63 and the frame 62 jointly lock the first seat 72 and the second seat 73, which is convenient to assemble and easy to produce.

[0079] Specifically, the support holes 71 and the transition holes 1021 are arranged in two rows, one above the other, and a transition hole 1021 is arranged between two adjacent support holes 71 in the same row.

[0080] Specifically, the support seat 7 is also provided with a position holding column 13, which is arranged in parallel with the pin column 9. The position holding column 13 elastically passes through the card insertion slot 61. The position holding column 13 is provided with an outer ring groove 131, and the number changing plate 102 is provided with a positioning hole 1022 for the position holding column 13 to pass through. The positioning hole 1022 is a long hole with large ends and a small middle; when the number changing plate 102 is in the locked position or the unlocked position, the outer ring groove 131 is staggered with the positioning hole 1022, and the position holding column 13 is located at both ends of the positioning hole 1022, so the number changing plate 102 is blocked in the sliding direction; only after the unlocking card 15 is inserted into the card insertion slot 61 to push the position holding column 13 inward and align the outer ring groove 131 with the embedded positioning hole 1022, can the position holding column 13 remove the obstruction of the number changing plate 102 in the sliding direction. That is, no matter whether the unlocking assembly 10 is located in the unlocking position or the locking position, as long as the unlocking card 15 is pulled out, the unlocking assembly 10 remains in the position.

[0081] Specifically, the ends of the pin column 9 near the card slot 61 and the end of the stop column 8 near the pin column 9 are arc-shaped, the end of the transition hole 1021 facing downward toward the stop column 8 is flared, and the middle bead 12 is cylindrical with chamfered edges at both ends, facilitating perpendicular movement or squeeze-to-displacement.

[0082] In this embodiment, Figure 2 As shown, the side wall of the card slot 61 is provided with a curved portion 611 to hinder the insertion of a flat unlocking card 15, that is, to limit the insertion of ordinary flat cards without matching holes 151, and only cards with the same curved shape can be inserted to avoid malicious unlocking.

[0083] In this embodiment, the push knob 11 is equipped with a key lock core 14. A protrusion is provided at the bottom of the key lock core 14, offset from the center axis. The transmission member 2 is provided with an elongated hole perpendicular to the sliding direction. The protrusion is embedded in the elongated hole, so that when the key lock core 14 rotates, the transmission member 2 slides. Two unlocking methods are provided: card unlocking and key unlocking.

[0084] Combined with the above Figures 10-1 to 10-3 As shown, in this embodiment, the top of the lock case 1 is further provided with two outwardly open lock holes 01. A retaining seat 3 is installed within the lock case 1. The retaining seat 3 is provided with two retaining grooves 31 aligned one-to-one with the lock holes 01. The opposite side walls of each retaining groove 31 are integrally formed with elastic arms 32. The inner side of the elastic arms 32 is provided with retaining protrusions 33 extending toward the retaining grooves 31, which are used to retain the peripheral locked object inserted through the lock hole 01. The elastic arms 32 are forced to swing away from the retaining grooves 31 to release the peripheral locked object. The side of the lock hole 01 is provided with an extension groove 02 that runs through the side of the lock case 1 to facilitate the insertion of the locked object.

[0085] A stop seat 4 is also provided at the clamping seat 3. In the locked state, the stop seat 4 presses against the outer side of the elastic arm 32 to limit its swing; in the unlocked state, the transmission member 2 drives the stop seat 4 to move to release the restriction on the elastic arm 32.

[0086] In this embodiment, the stop seat 4 is movably mounted at the bottom of the retaining seat 3. In the locked state, the transmission member 2 abuts the stop seat 4 in the upper position; in the unlocked state, the transmission member 2 drives the stop seat 4 to the lower position. The transmission member 2 and the stop seat 4 are perpendicular to each other in their directions of movement. A limiting protrusion 21 is provided on the top of the transmission member 2, and a clearance groove 41 is provided at the bottom of the stop seat 4. In the unlocked state, the transmission member 2 moves, causing the limiting protrusion 21 to sink into the clearance groove 41, thereby lowering the stop seat 4. A spring is installed within the lock housing 1 to apply force to the stop seat 4. One end of the spring abuts the retaining seat 3, while the other end abuts the stop seat 4, thereby maintaining the downward unlocking tendency of the stop seat 4, and automatically descending after unlocking. Along the sliding direction of the transmission member 2, a matching inclined surface 22 is provided between the wall of the clearance groove 41 and the limiting protrusion 21. This surface can actually be replaced with a matching curved surface to facilitate perpendicular movement from the unlocked position to the locked position.

[0087] In this embodiment, the stop base 4 comprises an integrated stop base 42 and a stop stand 43. The retaining base 3 is provided with a clearance hole 34 adjacent to the elastic arm 32, and the stop stand 43 is inserted into the clearance hole 34. Two retaining slots 31 are arranged side by side, with the elastic arm 32 positioned on opposite sides of each retaining slot 31. There are three stop stands 43, with the center stop stand 43 simultaneously restraining one of the elastic arms 32 in both retaining slots 31. Both the clearance hole 34 and the stop stand 43 are arc-shaped.

[0088] During use, the transmission member 2 moves to the unlocked position, the limiting protrusion 21 sinks into the clearance groove 41, the stop seat 4 is in a low position, and the stopper 43 does not contact the opposite side of the retaining protrusion 33 of the elastic arm 32. This allows the retaining protrusion 33 to deform outward, allowing an external object to be inserted through the lock hole 01 until it is securely engaged by the retaining protrusion 33. At this point, because the elastic arm 32 is not completely blocked by the stopping protrusion 43, the retaining protrusion 33 is squeezed and deformed. Therefore, external forces can still overcome the force of the retaining protrusion 33 and remove the locked object. To lock, the transmission member 2 moves to the locked position, the limiting protrusion 21 is offset from the clearance groove 41, the stop seat 4 is in a high position, and the stopping protrusion 43 contacts the elastic arm 32. This prevents the elastic arm 32 from deforming outward, and the retaining protrusion 33 faces inward to secure the locked object.

Claims

1. A card lock with a variable number, characterized by: The invention comprises a lock housing (1), a locking mechanism (5) and a transmission member (2), wherein the locking mechanism (5) is mounted on the lock housing (1), and the transmission member (2) is movably mounted on the lock housing (1) and is restricted by the locking mechanism (5). The transmission member (2) can be operated to move only after the locking mechanism (5) inputs a correct instruction. The locking mechanism (5) comprises an inner shell (6) and a support seat (7) fixed in the inner shell (6); the inner shell (6) and the lock shell (1) are provided with a card slot (61) for inserting an external unlocking card (15); The support seat (7) is provided with a plurality of support holes (71), each support hole (71) is provided with a limit column (8) and a pin column (9), and a spring is provided at the support seat (7) to apply force to the limit column (8), so that the limit column (8) keeps pushing the pin column (9) to penetrate into the card insertion slot (61); The locking mechanism (5) further comprises an unlocking assembly (10) slidably mounted on the support seat (7), and the transmission member (2) can slide together with the unlocking assembly (10) to unlock; the unlocking assembly (10) comprises a locking block (101), a number changing plate (102) and a push knob (11), and the push knob (11) extends out of the lock housing (1); the limiting column (8) is provided with a first locking portion (81), and the locking block (101) is provided with a second locking portion (1011), and the first locking portion (81) and the second locking portion (1011) abut against each other to prevent the unlocking assembly (10) from sliding to unlock; The number changing plate (102) is located at the intersection of the limiting column (8) and the pin column (9), and the number changing plate (102) is provided with a plurality of transition holes (1021). The number of the transition holes (1021) is greater than the number of the supporting holes (71), and when the unlocking assembly (10) is in the unlocking position and the locking position, the supporting holes (71) are aligned with different transition holes (1021); and intermediate beads (12) are provided in some of the transition holes (1021); When there is no intermediate bead (12) between the limiting column (8) and the pin column (9) and the pin column (9) is inserted into the card insertion slot (61), the first locking portion (81) and the second locking portion (1011) abut against each other to lock, and the unlocking card (15) is inserted into the card insertion slot (61) to push the pin column (9) and the limiting column (8) to move, so that the first locking portion (81) and the second locking portion (1011) are staggered and unlocked; When there is an intermediate bead (12) between the limiting column (8) and the ball column (9), the first locking portion (81) and the second locking portion (1011) remain staggered; When the unlocking assembly (10) is in the unlocking position, an unlocking card (15) with a matching hole (151) is inserted, and the middle bead (12) in the transition hole (1021) aligned with the matching hole (151) is shifted to the supporting hole (71). After the unlocking assembly (10) is reset to the locking position, the middle bead (12) in the supporting hole (71) is transferred to another transition hole (1021), thereby achieving a number change. The lock housing (1) is further provided with a lock hole (01) open toward the outside, a lock seat (300) is installed in the lock housing (1), and the lock seat (300) includes a holding seat (3), the holding seat (3) is provided with a holding groove (31) aligned with the lock hole (01), a side wall of the holding groove (31) is integrally formed with an elastic arm (32), and the inner side of the elastic arm (32) is provided with a holding protrusion (33) extending toward the holding groove (31), which is used to clamp the peripheral locked object inserted from the lock hole (01); the elastic arm (32) is able to swing in a direction away from the holding groove (31) under force to release the peripheral locked object; A stop seat (4) is also provided at the clamping seat (3). In the locked state, the stop seat (4) presses against the outer side of the elastic arm (32) to limit its swing; in the unlocked state, the transmission member (2) drives the stop seat (4) to move to release the restriction on the elastic arm (32).

2. The variable number card lock according to claim 1, characterized in that: The stop seat (4) is movably mounted on the bottom of the holding seat (3). In the locked state, the transmission member (2) abuts against the stop seat (4) and is in a high position. In the unlocked state, the transmission member (2) drives the stop seat (4) to be in a low position. The movement directions of the transmission member (2) and the stop seat (4) are perpendicular. A limiting protrusion (21) is provided on the top of the transmission member (2), and a clearance groove (41) is provided on the bottom of the stop seat (4). In the unlocked state, the transmission member (2) moves to cause the limiting protrusion (21) to sink into the clearance groove (41), thereby causing the stop seat (4) to descend.

3. The variable number card lock according to claim 2, characterized in that: The stop seat (4) comprises a stop base (42) and a stop stand (43) which are integrated with each other. The clamping seat (3) is provided with an avoidance hole (34) at the side of the elastic arm (32), and the stop stand (43) is passed through the avoidance hole (34). The two clamping grooves (31) are arranged in parallel, and the elastic arms (32) are respectively provided on the opposite sides of each clamping groove (31). There are three stop stands (43), and the stop stand (43) located in the middle simultaneously limits one of the elastic arms (32) of the two clamping grooves (31).

4. The variable number card lock according to claim 1, characterized in that: The support seat (7) comprises a first seat body (72) and a second seat body (73) fixed to each other. The first seat body (72), the number changing plate (102), the second seat body (73) and the locking block (101) are arranged in sequence in a direction away from the card insertion slot (61).

5. The variable number card lock according to claim 4, characterized in that: The first base body (72) and the second base body (73) are fitted and fixed together, and a receiving groove (74) for the number changing plate (102) to slide therein is opened between the first base body (72) and the second base body (73), and the length of the ball column (9) is equal to the length of the supporting hole (71) in the first base body (72).

6. The card lock with a variable number according to claim 4, characterized in that: The inner shell (6) includes a "["-shaped frame (62) and a locking plate (63). A guide slideway (64) is provided between the ends of the first seat (72) and the second seat (73) and the frame (62). The locking plate (63) and the frame (62) jointly lock the first seat (72) and the second seat (73).

7. The card lock with a variable number according to claim 1, characterized in that: The support seat (7) is further provided with a position holding column (13), which is arranged in parallel with the pin column (9), the position holding column (13) is provided with an outer ring groove (131), and the number changing plate (102) is provided with a positioning hole (1022) for the position holding column (13) to pass through, and the positioning hole (1022) is a long hole with large ends and a small middle; when the number changing plate (102) is in the locked position or the unlocked position, the outer ring groove (131) and the positioning hole (1022) are staggered, and the number changing plate (102) is blocked in the sliding direction; only after the unlocking card (15) is inserted into the card slot (61) to push the position holding column (13) inward and align the outer ring groove (131) with the embedded positioning hole (1022), can the position holding column (13) remove the obstruction to the number changing plate (102) in the sliding direction.

8. The card lock with a variable number according to claim 1, characterized in that: The end of the pin column (9) close to the card slot (61) and the end of the limit column (8) close to the pin column (9) are arc-shaped, the end of the transition hole (1021) facing the limit column (8) downward is in the shape of a flared trumpet, and the middle bead (12) is cylindrical and has chamfered edges at both ends.

9. The card lock with a variable number according to claim 1, characterized in that: The side wall of the card insertion slot (61) is provided with a curved portion (611) to hinder the insertion of a flat unlocking card (15).

10. The card lock with a variable number according to claim 1, characterized in that: The push knob (11) is provided with a key lock core (14), a convex column is provided at the bottom of the key lock core (14) at a position deviated from the central axis, and the transmission member (2) is provided with a long hole perpendicular to the sliding direction, and the convex column is embedded in the long hole, so that when the key lock core (14) rotates, the transmission member (2) is driven to slide.

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