A combination lock and storage box

Abstract

The invention discloses a combination lock and a storage box; it relates to the field of locks; the combination lock comprises an upper cover lock tongue and a lock body, the upper cover lock tongue side wall is provided with an upper cover lock tongue hole, the lock body is provided with a lock tongue, one end of the lock tongue is provided with a lock tongue spring, when the upper cover lock tongue end vertically enters the lock body, the lock tongue can be pushed back to a position away from the lock tongue hole of the lock body and squeeze the lock tongue spring; when the upper cover lock tongue end moves to the upper cover lock tongue hole and is coaxial with the lock tongue, the lock tongue spring drives the lock tongue forward to the lock body lock tongue hole, at this time, the lock part of the lock tongue enters the upper cover lock tongue hole; the password part is arranged in the lock body, and when the password wheel assembly thereof is turned to the set sequence, the knob can drive the lock tongue forward or backward. The storage box adopting the combination lock of the invention can also push the lock tongue backward by pressing the upper cover lock tongue into the lock body when the password is wrong, and when the upper cover lock tongue moves to the set position, the lock tongue advances to the upper cover lock tongue hole under the action of elastic force to achieve the locking effect.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and in particular to a combination lock and a storage box. Background Art

[0002] A combination lock is a lock that is opened and closed based on a password input. Mechanical combination locks are widely used because they do not rely on electricity but use mechanical mechanisms to set and verify passwords. Common mechanical combination locks include multiple combination wheels, which are rotated to the correct combination to achieve the opening and closing function. Current combination locks cannot ensure that the combination wheel is in the correct combination position when closing the lock. If the password is wrong, forcing the lock to close will not only prevent the lock from closing smoothly due to obstacles, but also easily cause damage to the locking mechanism.

[0003] Therefore, it is urgent to design a technical solution that can successfully lock the door even when the password is wrong. Summary of the invention

[0004] The purpose of the present invention is to provide a combination lock and a storage box to solve the problems existing in the above-mentioned prior art. When the password is wrong, pressing the upper cover lock tongue into the lock body can also push the lock tongue back. When the upper cover lock tongue moves to the set position, the lock tongue moves forward to the upper cover lock tongue hole under the action of elastic force to achieve the locking effect.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a password lock, comprising:

[0007] An upper cover lock tongue, whose side wall is provided with an upper cover lock tongue hole, and the head end of the upper cover lock tongue is fixedly arranged on the first locking part;

[0008] The lock body is arranged on the second locking part, a lock tongue is arranged in the lock body, a lock tongue spring is arranged at one end of the lock tongue, a lock tongue hole for the upper cover lock tongue to enter and exit is opened at the top of the lock body, and the upper cover lock tongue can push the lock tongue back to a position away from the lower part of the lock tongue hole and squeeze the lock tongue spring when the upper cover lock tongue end vertically enters the lock body; when the upper cover lock tongue end moves to the point where the upper cover lock tongue hole is coaxial with the lock tongue, the lock tongue spring drives the lock tongue forward to the lower part of the lock body lock tongue hole, and at this time, the lock buckle part of the lock tongue enters the upper cover lock tongue hole, thereby locking the first locking part and the second locking part;

[0009] The password part is arranged in the lock body, and comprises a password wheel assembly and a knob. When the password wheel assembly is turned to a set sequence, the knob can drive the lock tongue to move forward or backward.

[0010] Optionally, the lock catch portion is fixedly provided at the end of the lock tongue, the lock catch portion is a wedge-shaped structure, and the upper end surface of the lock catch portion is a planar structure that gradually tilts downward from close to the lock tongue end to away from the lock tongue end. When the end of the upper cover lock tongue vertically enters the lock body, it squeezes the upper end surface of the lock catch portion and slides relative to the upper end surface, so that the lock tongue retreats to a position directly below the lock tongue hole away from the lock body.

[0011] Optionally, the lock tongue is a rectangular frame structure, the outer side of the first vertical side of the lock tongue is connected to the lock tongue spring, the inner side of the first vertical side and the outer side of the second vertical side of the lock tongue are each fixedly provided with a lock catch portion, and the first locking portion is symmetrically provided with two upper cover lock tongues; the lock catch portion is a wedge-shaped structure, and the upper end surface of the lock catch portion is a planar structure that gradually tilts downward from close to the lock tongue end to away from the lock tongue end, and during the process of the upper cover lock tongue end vertically entering the lock body, it squeezes the corresponding upper end surface of the lock catch portion and slides relative to the upper end surface, so that the lock tongue retreats to a position directly below the lock tongue hole away from the lock body.

[0012] Optionally, the lock tongue also includes a lock tongue spring and a connecting plate, one end of the connecting plate is hinged to the lock tongue, and the other end of the connecting plate is in contact with the knob; the lock tongue spring is fixedly connected to the outer side of one end of the connecting plate to which the lock tongue is hinged, and the lock tongue spring abuts against the inner wall of the lock body.

[0013] Optionally, the bottom wall of the lock body is opened, and the knob is inserted into the opening of the lock body; a steel wire retaining ring for the shaft is sleeved on the outer wall of the knob, and the steel wire retaining ring for the shaft is rotatably connected to the opening of the lock body; one end of the knob located in the lock body is contacted and connected to the connecting plate through a pin rod.

[0014] Optionally, a knob groove is provided at one end of the knob located in the lock body, a support portion is provided in the knob groove and is fitted against an inner wall of the knob groove, and the pin rod is fixed on the support portion; a deformation groove is provided on the inner side of the connecting plate away from one end of the lock tongue, and the side wall of the pin rod abuts against the deformation groove.

[0015] Optionally, the deformation groove includes a first arc groove and a second arc groove that are smoothly connected, the depth of the first arc groove is less than the depth of the second arc groove, the first arc groove is located on the inner side of the connecting plate away from one end of the locking tongue, and the second arc groove is located on the inner side of the connecting plate near the middle position.

[0016] Optionally, a strip groove is provided in the lock body, the bottom of the lock tongue is slidably disposed in the strip groove, and the lock tongue can move horizontally in the strip groove to just below the lock tongue hole of the lock body or away from just below the lock tongue hole of the lock body.

[0017] Optionally, the knob side wall is provided with two circumferentially arranged shaft grooves, a sliding surface is connected between the two shaft grooves, and the end of the sliding surface is connected to the adjacent shaft groove by an inclined convex ridge; the code wheel assembly includes a locking rod arranged in the lock body, a locking rod spring is sleeved on the locking rod, one end of the locking rod spring is fixedly connected to the lock body, and the other end is fixedly connected to the locking rod, and the end of the locking rod abuts against one of the shaft grooves on the knob side wall; a plurality of wheel disc holes are symmetrically provided on the bottom wall of the lock body, a code wheel is movably provided at the wheel disc hole, and the code wheel A digital password is provided on the outer circumferential surface; the password wheel is inserted into the locking rod, and the side wall of the locking rod is fixedly provided with limiting protrusions with the same number as the password wheel; a coaxial positioning wheel is provided on the inner circumferential surface of the password wheel, and the positioning wheel is sleeved on the locking rod, and a limiting groove is provided on the inner side of the positioning wheel, and the limiting groove and one of the digital passwords of the password wheel are located on the same radial section, and the limiting protrusion can slide in the corresponding limiting groove; when the end of the locking rod is located in the shaft groove, the limiting protrusion is located on the outer side of the corresponding password wheel close to the knob end.

[0018] The present invention also provides a storage box, comprising the above-mentioned combination lock;

[0019] An upper cover, the upper cover being a first locking portion, and an upper cover locking tongue being provided at the bottom of one side of the upper cover;

[0020] The bottom shell is the second locking part, the side of the upper cover away from the upper cover lock tongue is hinged to the bottom shell, and the side of the bottom shell close to the upper cover lock tongue is fixed with the lock body.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] In a traditional mechanical password lock, when the password is wrong, the knob will be restricted and cannot be rotated, and then the lock tongue will be fixed and the locking function cannot be realized. The lock tongue of the present invention is provided with a lock tongue spring on the side away from the upper cover lock tongue, and the knob can drive the lock tongue to move forward and backward to realize the opening and closing of the lock. At the same time, the knob will not restrict and lock the lock tongue, so that the upper cover lock tongue can push the lock tongue backward when it enters the lock body downward. When it retreats to the upper cover lock tongue hole and the end of the lock tongue are at the same height, the lock tongue is pushed forward to the upper cover lock tongue hole under the elastic force of the lock tongue spring to achieve the locking effect. Therefore, when the password is wrong and the knob is restricted and cannot be rotated, the locking function can still be realized, and no impact damage will be caused to the upper cover lock tongue and the lock tongue. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the storage box of the present invention;

[0025] Figure 2 It is a schematic diagram of the bottom shell of the storage box of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the lock body of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the cipher part of the present invention;

[0028] Figure 5 This is a schematic diagram of the upper cover of the storage box of the present invention;

[0029] Figure 6 It is a schematic diagram of the lock tongue, lock tongue spring and password wheel assembly of the present invention;

[0030] Figure 7 It is a schematic diagram of the pin rod of the present invention;

[0031] Figure 8 It is a schematic diagram of the knob of the present invention;

[0032] Fig. 9 A schematic diagram of the internal structure of the lock body when the lock tongue is at an end away from the lock tongue hole of the lock body;

[0033] Fig.10 This is an exploded view of the lock body;

[0034] Fig.11 A schematic diagram of one structure of the first locking portion and the second locking portion of the present invention;

[0035] Fig.12 It is a schematic diagram of the structure of the cipher part of the present invention;

[0036] Fig.13 It is a schematic diagram of the lock body structure of the present invention.

[0037] In the figure: 100-first locking part, 200-second locking part, 300-password part, 301-password wheel assembly, 1-bottom shell, 2-upper cover, 3-upper cover lock tongue, 4-upper cover lock tongue hole, 5-lock body, 501-lock body cover, 5011-wheel hole, 502-lock body bottom shell, 5021-strip groove, 5022-installation groove, 6-lock tongue, 7-lock buckle part, 8-connecting plate, 80 1-deformation groove, 9-lock tongue spring, 10-knob, 11-wire retaining ring for shaft, 12-pin rod, 13-knob groove, 14-support part, 15-first arc groove, 16-second arc groove, 17-shaft groove, 18-inclined convex ridge, 19-lock rod, 20-lock rod spring, 21-password wheel, 22-limiting protrusion, 23-positioning wheel, 2301-limiting groove, 24-lock body lock tongue hole. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The purpose of the present invention is to provide a combination lock and a storage box to solve the problems existing in the above-mentioned prior art. When the password is wrong, pressing the upper cover lock tongue into the lock body can also push the lock tongue back. When the upper cover lock tongue moves to the set position, the lock tongue moves forward to the upper cover lock tongue hole under the action of elastic force to achieve the locking effect.

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] In the related art, the mechanical combination lock can only rotate the knob when the combination wheel is rotated to the correct combination position, thereby driving the lock tongue to move forward and backward to realize the opening and closing lock function. When the combination lock is in the open state, if the combination wheel is accidentally touched, causing the combination wheel to rotate to an incorrect combination, the knob is fixed and the lock tongue cannot move forward and backward. If the lock is forcibly closed at this time, the upper cover lock tongue will interfere with the lock tongue, thereby damaging the upper cover lock tongue or the lock tongue. In order to avoid this problem, the locking function can be realized regardless of whether the password is correct or not. Therefore, the present invention provides a combination lock, reference Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 As shown, it includes an upper cover lock tongue 3, a lock body 5 and a password part 300. The upper cover lock tongue 3 has an upper cover lock tongue hole 4 on its side wall, and the upper cover lock tongue 3 is fixedly mounted on the first locking part 100 at its head end. The first locking part 100 of this embodiment is Fig.11 The cover plate structure with a groove in the lock body 5 is arranged on the second locking portion 200, such as Fig.11 The second locking portion 200 of this embodiment is Fig.11 The cross section of the tub-shaped structure is an elliptical one, and other similar structures can also be used instead, such as Fig.13 As shown, the lock body 5 includes a lock body cover 501 and a lock body bottom shell 502 that can be docked, and the two are docked to form an installation space. A lock tongue 6 is provided at the installation space in the lock body 5, and a lock tongue spring 9 is provided at one end of the lock tongue 6. A lock body lock tongue hole 24 for the upper cover lock tongue 3 to enter and exit is opened on the top of the lock body 5. During the process of the upper cover lock tongue 3 vertically entering the lock body 5 through the lock body lock tongue hole 24, the lock tongue 6 can be pushed back to the end away from the lock body lock tongue hole 24 directly below the lock body lock tongue hole 24 and squeeze the lock tongue spring 9; when the upper cover lock tongue 3 moves to the upper cover lock tongue hole 4 and is coaxial with the lock tongue 6, the lock tongue spring 9 drives the lock tongue 6 to move forward to the lock body lock tongue hole 24 directly below the lock body lock tongue hole 24. At this time, the lock buckle part 7 of the lock tongue 6 enters the upper cover lock tongue hole 4 to achieve the locking of the first locking part 100 and the second locking part 200; the password part 300 is arranged in the lock body 5, which includes a password wheel assembly 301 When the password wheel assembly 301 is turned to the set sequence, the knob 10 can drive the lock tongue 6 to move forward or backward, thereby making the lock tongue 6 switch between the end directly below the lock tongue hole 24 of the lock body and the end directly away from the lock tongue hole 24 of the lock body. The knob 10 of the present invention abuts against the lock tongue spring 9, so that when the knob 10 is rotated, the lock tongue spring 9 can be moved forward and backward, thereby driving the lock tongue 6 to move forward and backward, thereby realizing the switch lock function. At the same time, the knob 10 will not limit the autonomous movement of the lock tongue 6 and the lock tongue spring 9. When locking, the upper cover lock tongue 3 presses down the end of the lock tongue 6, and cooperates with the lock tongue spring 9 to realize the locking function. The lock will not be unable to be locked due to incorrect passwords. After locking, the lock tongue spring 9 pushes the end of the lock tongue 6 into the upper cover lock tongue hole 4, and the upper cover lock tongue 3 cannot vertically extend out of the lock body 5, thereby realizing the locking function of the password lock.

[0042] In order to enable the upper cover lock tongue 3 to smoothly push the lock tongue 6 back during the locking process, a lock catch portion 7 is fixedly provided at the end of the lock tongue 6 in this embodiment. The lock catch portion 7 is a wedge-shaped structure, and the upper end surface of the lock catch portion 7 is a plane structure that gradually tilts downward from the end close to the lock tongue 6 to the end away from the lock tongue 6. A strip groove 5021 is provided in the lock body bottom shell 502 of the lock body 5, and the bottom of the lock tongue 6 is slidably arranged in the strip groove 5021, and the lock tongue 6 can move horizontally in the strip groove 5021 to the position directly below the lock body lock tongue hole 24 or away from the lock body lock tongue hole 2 4; when the end of the upper cover lock tongue 3 vertically enters the lock body 5, the end of the upper cover lock tongue 3 abuts against the upper end surface, presses the upper end surface of the lock buckle part 7, and slides relatively along the inclined direction of the upper end surface. Since the upper cover lock tongue 3 is fixed in the horizontal direction, the vertical direction of the lock tongue 6 is limited, and the lock tongue 6 can move horizontally, when the upper cover lock tongue 3 falls vertically, the lock buckle part 7 retreats, achieving the effect of relative sliding of the end of the upper cover lock tongue 3 along the inclined direction of the upper end surface, so that the lock tongue 6 retreats to a position directly below the lock tongue hole 24 away from the lock body.

[0043] In another embodiment, in order to achieve a better locking effect and avoid shaking between the first locking part 100 and the second locking part 200 after locking, two upper cover lock tongues 3 arranged in parallel are provided in this embodiment. Similarly, two locking parts 7 corresponding to the upper cover lock tongue 3 are provided. In order to install the two locking parts 7, the lock tongue 6 is designed as a rectangular frame structure. The outer side of the first vertical side of the lock tongue 6 is connected to the lock tongue spring 9. A locking part 7 is fixedly provided on the inner side of the first vertical side and the outer side of the second vertical side of the lock tongue 6. When the end of the lock tongue 3 vertically enters the lock body 5, it squeezes the upper end surface of the corresponding lock catch part 7 and slides relative to the upper end surface, so that the lock tongue 6 retreats to a position directly below the lock tongue hole 24 of the lock body. Since the lock tongue 6 is a rectangular frame structure, one of the upper cover lock tongues 3 is outside the rectangular frame and corresponds to the lock catch part 7 outside the rectangular frame, and the other upper cover lock tongue 3 enters the space inside the rectangular frame. During the movement of the rectangular frame back and forth, the space inside the rectangular frame is larger and will not touch the upper cover lock tongue 3. Therefore, when the lock tongue 6 moves back and forth, it will not interfere with the two upper cover lock tongues 3.

[0044] The lock tongue 6 in this embodiment also includes a connecting plate 8, one end of the connecting plate 8 is hinged to the lock tongue 6, and the other end of the connecting plate 8 is in contact with the knob 10, so that the rotation of the knob 10 can drive the lock tongue 6 to move forward and backward through the connecting plate 8 to realize the switch lock. At the same time, when the upper cover lock tongue 3 falls and drives the lock tongue 6 to retreat, the connecting plate 8 follows the movement of the lock tongue 6 and will not be interfered by the knob 10; the outer side of one end of the connecting plate 8 hinged with the lock tongue 6 is fixedly connected to a lock tongue spring 9, and the lock tongue spring 9 abuts against the inner side wall of the lock body 5. When the upper cover lock tongue 3 falls and drives the lock tongue 6 to retreat, the lock tongue spring 9 is squeezed, so that when the upper cover lock tongue 3 falls to the upper cover lock tongue hole 4 and the lock buckle part 7 is opposite, the lock buckle part 7 enters the corresponding upper cover lock tongue hole 4, and the elastic force of the lock tongue spring 9 drives the lock tongue 6 to move forward, so that the lock buckle part 7 is clamped in the upper cover lock tongue hole 4 to achieve the locking effect.

[0045] In order to install the knob 10, a hole is opened in the bottom wall of the lock body 5 in this embodiment, and the knob 10 is inserted into the hole of the lock body 5. A shaft wire retaining ring 11 is sleeved on the outer wall of the knob 10, which is a ring-shaped structure with a circular cross-section. The shaft wire retaining ring 11 is rotatably connected to the inner side wall of the hole of the lock body 5, so that the knob 10 can be rotated at the hole of the lock body 5 through the shaft wire retaining ring 11. In other embodiments, a structure similar to a bearing can also be used here, and a bearing is provided at the hole of the lock body 5, and a bearing is inserted into the bearing. A knob 10 is provided, and the knob 10 can also realize a rotation function; in this embodiment, a knob groove 13 is opened at one end of the knob 10 located in the lock body 5, and a support portion 14 is provided in the knob groove 13 and is fitted with an inner side wall of the knob groove 13, and a pin rod 12 is fixed on the support portion 14; a deformation groove 801 is provided on the inner side of the end of the connecting plate 8 away from the lock tongue 6, and the side wall of the pin rod 12 abuts against the deformation groove 801. When the knob 10 is rotated, the pin rod 12 moves in the deformation groove 801, thereby pushing the connecting plate 8 to drive the lock tongue 6 to move forward and backward.

[0046] In order to make the moving process controllable, Figure 6Therefore, in one of the embodiments, the deformation groove 801 is designed to include a first arc groove 15 and a second arc groove 16 which are smoothly connected. The depth of the first arc groove 15 is less than the depth of the second arc groove 16. The first arc groove 15 is located on the inner side of the end of the connecting plate 8 away from the lock tongue 6, and the second arc groove 16 is located on the inner side of the connecting plate 8 near the middle position. The side wall of the pin rod 12 abuts against the first arc groove 15. When the knob 10 is fixed, the pin rod 12 is equivalent to a rotating shaft. At this time, when the upper cover lock tongue 3 falls and pushes the lock tongue 6 to retreat, the end of the connecting plate 8 hinged to the lock tongue 6 swings backward with the pin rod 12 as the axis to realize the retreat of the lock tongue 6. When the lock tongue spring 9 drives the lock tongue 6 forward, the end of the connecting plate 8 hinged to the lock tongue 6 swings forward with the pin rod 12 as the axis to realize the advancement of the lock tongue 6. When the password is correct and the knob 10 can be rotated, the knob 10 is turned, and the pin rod 12 moves along the side wall of the deformation groove 801, from the first arc groove 15 to the second arc groove 16. The second arc groove 16 is located near the middle position of the connecting plate 8. When the pin rod 12 moves to the second arc groove 16, it reaches the limit position and is limited by the second arc groove 16 of the connecting plate 8. The knob 10 continues to rotate, which will drive the pin rod 12 to drive the connecting plate 8 to move backward as a whole, and then drive the lock tongue 6 to retreat. The knob 10 is rotated in the opposite direction to move the pin rod 12 from the second arc groove 16 to the first arc groove 15. Under the pressure of the lock tongue spring 9, the connecting plate 8 can drive the lock tongue 6 to move forward.

[0047] In order to realize the limiting function of the code wheel assembly 301 on the knob 10, the present embodiment provides two circumferentially arranged shaft grooves 17 on the side wall of the knob 10, a sliding surface is connected between the two shaft grooves 17, and the end of the sliding surface is connected to the adjacent shaft groove 17 by an inclined convex ridge 18; the lock body 5 is provided with a mounting groove 5022 on one side of the strip groove 5021, and the code wheel assembly 301 includes a locking rod 19 arranged at the mounting groove 5022 in the lock body 5, and a locking rod spring 20 is sleeved on the locking rod 19, one end of the locking rod spring 20 is fixedly connected to the side wall of the mounting groove 5022 of the lock body 5, and the other end is fixedly connected to the locking rod 19, and the end of the locking rod 19 abuts against one of the shaft grooves 17 on the side wall of the knob 10, and the design position of the shaft groove 17 is aligned with the lock body lock tongue hole When the lock rod 19 is located in one of the shaft grooves 17, the pin rod 12 is located at the position of the first arc groove 15. At this time, the locking function can be realized, but once locked, it will be locked and the combination lock cannot be opened. When the password is correct, the knob 10 is turned to make the end of the lock rod 19 enter the other shaft groove 17 along the inclined ridge 18. During this process, the pin rod 12 gradually enters the second arc groove 16. When the end of the lock rod 19 enters the other shaft groove 17 along the inclined ridge 18, the pin rod 12 pushes the connecting plate 8 and the lock tongue 6 back to the end away from the lock body lock tongue hole 24. At this time, the lock buckle part 7 is separated from the lock tongue hole 4 of the upper cover, and the combination lock can be opened or locked again.

[0048] In this embodiment, a plurality of wheel holes 5011 are symmetrically provided on the bottom wall of the lock body 5, and the code wheel assembly 301 includes a code wheel 21, and the code wheel 21 is movably provided at the wheel hole 5011, and a digital code is provided on the outer circumferential surface of the code wheel 21, and a small part of the code wheel 21 is located outside the wheel hole, so that the digital code at this location can be displayed; the code wheel 21 is passed through the lock rod 19, and the side wall of the lock rod 19 is fixedly provided with a limiting protrusion 22 of the same number as the code wheel 21; a positioning wheel 23 is provided on the inner circumferential surface of the code wheel 21, and an axial limiting groove is provided on the inner side of the positioning wheel 23 2301, the limiting groove 2301 and one of the digital codes of the code wheel 21 are located on the same radial section, and the limiting protrusion 22 can slide in the limiting groove 2301 of the corresponding positioning wheel 23; when the end of the locking rod 19 is located in the shaft groove 17, the limiting protrusion 22 is located on the outer side of the corresponding code wheel 21 close to the end of the knob 10. At this time, the axial direction of the locking rod 19 is limited, and the limiting protrusion 22 abuts against one side of the corresponding code wheel 21, so that the locking rod 19 cannot move axially, and the knob 10 is also limited, so that the knob 10 cannot rotate, thereby achieving a locking effect. When the password wheel 21 is rotated so that the limiting protrusion 22 corresponds coaxially with the limiting groove 2301 of the corresponding positioning wheel 23, the number on the password wheel 21 is the correct password value at this time, and the limiting protrusion 22 can move axially in the limiting groove 2301 of the positioning wheel 23, and then the locking rod 19 can move axially. When the knob 10 is rotated, the locking rod 19 can move axially and stretch the locking rod spring 20, which will not limit the rotation of the knob 10, and the switch lock function can be realized. When the knob 10 is rotated into place, under the action of the restoring force of the locking rod spring 20, the locking rod 19 moves toward one end of the knob 10 to the corresponding shaft groove 17. At this time, the limiting protrusion 22 disengages from the positioning wheel 23, and the limiting protrusion 22 is located on the corresponding side of the password wheel 21. At this time, the password wheel 21 can be rotated to disrupt the numerical arrangement order of the password wheel 21, thereby realizing the password locking function.

[0049] In another embodiment, based on the above technical solution, the present invention further provides a storage box, such as Figure 1 , Figure 2 and Figure 5 As shown, it includes a bottom shell 1, and an upper cover 2 is hinged on one side of the bottom shell 1. Specifically for the storage box embodiment, the first locking part of this embodiment is the upper cover 2, and the second locking part is the bottom shell 1. An upper cover lock tongue 3 is provided at the bottom of the upper cover 2 away from the hinged end; a lock body 5 is fixedly provided on the side of the bottom shell 1 close to the upper cover lock tongue 3, so as to achieve locking of the upper cover 2 and the bottom shell 1. In this embodiment, the upper cover 2 is fitted with an upper cover lining inside, and the bottom shell 1 is fitted with a bottom shell lining inside.

[0050] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A combination lock, characterized in that: include: An upper cover lock tongue, a side wall of which is provided with an upper cover lock tongue hole, and a head end of the upper cover lock tongue is fixedly arranged on the first locking portion; The lock body is arranged on the second locking part, a lock tongue is arranged in the lock body, a lock tongue spring is arranged at one end of the lock tongue, a lock tongue hole for the upper cover lock tongue to enter and exit is opened at the top of the lock body, and the upper cover lock tongue can push the lock tongue back to a position away from the lower part of the lock tongue hole and squeeze the lock tongue spring when the upper cover lock tongue end vertically enters the lock body; when the upper cover lock tongue end moves to the point where the upper cover lock tongue hole is coaxial with the lock tongue, the lock tongue spring drives the lock tongue forward to the lower part of the lock body lock tongue hole, and at this time, the lock buckle part of the lock tongue enters the upper cover lock tongue hole, thereby locking the first locking part and the second locking part; The password part is arranged in the lock body, and includes a password wheel assembly and a knob. When the password wheel assembly is turned to a set sequence, the knob can drive the lock tongue to move forward or backward; The knob side wall is provided with two circumferentially arranged shaft grooves, a sliding surface is connected between the two shaft grooves, and the end of the sliding surface is connected to the adjacent shaft grooves through an inclined convex ridge; the code wheel assembly comprises a lock rod arranged in the lock body, a lock rod spring is sleeved on the lock rod, one end of the lock rod spring is fixedly connected to the lock body, and the other end is fixedly connected to the lock rod, and the end of the lock rod abuts against one of the shaft grooves on the knob side wall; a plurality of wheel disc holes are symmetrically provided on the bottom wall of the lock body, a code wheel is movably provided at the wheel disc hole, and the code wheel A digital code is arranged on the outer circumference of the code wheel; the code wheel is passed through the locking rod, and the side wall of the locking rod is fixedly provided with limit protrusions of the same number as the code wheel; a coaxial positioning wheel is arranged on the inner circumference of the code wheel, and a limit groove is arranged on the inner side of the positioning wheel, the limit groove and one of the digital codes of the code wheel are located on the same radial section, and the limit protrusion can slide in the corresponding limit groove; when the end of the locking rod is located in the shaft groove, the limit protrusion is located on the outer side of the corresponding code wheel close to the knob end.

2. The combination lock according to claim 1, characterized in that: The lock catch portion is fixedly provided at the end of the lock tongue, and the lock catch portion is a wedge-shaped structure, and the upper end surface of the lock catch portion is a plane structure that gradually tilts downward from the end close to the lock tongue to the end away from the lock tongue. During the process of the upper cover lock tongue end vertically entering the lock body, the upper end surface of the lock catch portion is squeezed and slides relative to the upper end surface, so that the lock tongue retreats to a position directly below the lock tongue hole away from the lock body.

3. The combination lock according to claim 1, characterized in that: The lock tongue is a rectangular frame-shaped structure, the outer side of the first vertical side of the lock tongue is connected to the lock tongue spring, the inner side of the first vertical side of the lock tongue and the outer side of the second vertical side of the lock tongue are each fixedly provided with a locking portion, and two upper cover lock tongues are symmetrically provided on the first locking portion; the locking portion is a wedge-shaped structure, and the upper end surface of the locking portion is a plane structure that gradually tilts downward from the end close to the lock tongue to the end away from the lock tongue end, and when the upper cover lock tongue end vertically enters the lock body, it squeezes the corresponding upper end surface of the locking portion and slides relative to the upper end surface, so that the lock tongue retreats to a position directly below the lock tongue hole away from the lock body.

4. The combination lock according to claim 1, characterized in that: The lock tongue also includes a connecting plate, one end of which is hinged to the lock tongue, and the other end of which is in contact with the knob; the lock tongue spring is fixedly connected to the outer side of one end of the connecting plate to which the lock tongue is hinged, and the lock tongue spring abuts against the inner wall of the lock body.

5. The combination lock according to claim 4, characterized in that: The bottom wall of the lock body is opened, and the knob is inserted into the opening of the lock body. The outer wall of the knob is sleeved with a shaft wire retaining ring, and the shaft wire retaining ring is rotatably connected to the opening of the lock body; one end of the knob located in the lock body is contacted and connected to the connecting plate through a pin rod.

6. The combination lock according to claim 5, characterized in that: The knob is located at one end of the lock body and is provided with a knob groove, the knob groove is provided with a support portion that fits the inner wall of the knob groove, and the pin rod is fixed on the support portion; the inner side of the connecting plate away from the end of the lock tongue is provided with a deformation groove, and the side wall of the pin rod abuts against the deformation groove.

7. The combination lock according to claim 6, characterized in that: The deformation groove includes a first arc groove and a second arc groove which are smoothly connected. The depth of the first arc groove is less than the depth of the second arc groove. The first arc groove is located on the inner side of the connecting plate away from one end of the locking tongue, and the second arc groove is located on the inner side of the connecting plate near the middle position.

8. The combination lock according to claim 1, characterized in that: The lock body is provided with a strip groove, the bottom of the lock tongue is slidably arranged in the strip groove, and the lock tongue can move horizontally in the strip groove to the position directly below the lock tongue hole of the lock body or away from the position directly below the lock tongue hole of the lock body.

9. A storage box, characterized in that: Comprising the combination lock as claimed in any one of claims 1 to 8; An upper cover, the upper cover being a first locking portion, and an upper cover locking tongue being provided at the bottom of one side of the upper cover; The bottom shell is the second locking part, the side of the upper cover away from the upper cover lock tongue is hinged to the bottom shell, and the side of the bottom shell close to the upper cover lock tongue is fixed with the lock body.

Images