Locking structure and locking lock

Abstract

The utility model provides a locking structure which comprises a locking lock shell, a spring bolt assembly, a shifting peach and a protective cover, the locking lock shell is provided with a first limiting hole and an opening communicated with the first limiting hole, and the first limiting hole is communicated with the outside through the opening. The spring bolt assembly is movably arranged on the locking lock shell. The shifting peach can be assembled in the locking lock shell through the opening, and the shifting peach is connected with the spring bolt assembly and rotatably arranged on the locking lock shell so as to drive the spring bolt assembly to stretch out or retract relative to the locking lock shell; the protective cover is arranged on the locking lock shell and can seal the opening so that at least part of the shifting peach can be contained in the first limiting hole in a limited mode. According to the locking structure, the opening of the locking lock shell is closed through the protective cover, so that at least part of the shifting peach is limited and contained in the first limiting hole, the shifting peach is prevented from being separated from the locking lock shell during rotation, and the stability of the locking structure in the operation process is improved. The utility model further provides a locking lock.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lockset, specifically, relates to a locking structure and locking lockset. BACKGROUND

[0002] The locking is commonly known as dead lock, is one of many locksets at present and is widely used in house doors, cabinets and the like. The locking comprises a lock shell and a rotating knob rotatably installed in the lock shell, and the rotating knob can drive the bolt to extend or retract through rotation. However, the rotating knob on the market has a probability of falling out of the lock shell during rotation, which reduces the operation stability of the locking and is inconvenient for users to use. SUMMARY

[0003] The utility model embodiment aims to provide a locking structure and locking lockset to solve the above problems. The utility model embodiment realizes the above purpose through the following technical scheme.

[0004] In a first aspect, the utility model provides a locking structure, comprising:

[0005] A locking shell, the locking shell is provided with a first limiting hole and an opening in communication with the first limiting hole, and the first limiting hole is in communication with the outside through the opening;

[0006] A bolt assembly, the bolt assembly is movably arranged in the locking shell;

[0007] A rotating knob, the rotating knob can be assembled in the locking shell through the opening, the rotating knob is connected with the bolt assembly and is rotatably arranged in the locking shell to drive the bolt assembly to extend or retract relative to the locking shell; and

[0008] A protective cover, the protective cover is arranged in the locking shell and can close the opening, so that at least part of the rotating knob is limited and accommodated in the first limiting hole.

[0009] In an embodiment, the protective cover is provided with a second limiting hole, the second limiting hole corresponds to the position of the first limiting hole, and the outline of the second limiting hole at least partially coincides with the outline of the first limiting hole, and the rotating knob is also limited and accommodated in the second limiting hole.

[0010] In an embodiment, the protective cover is detachably connected with the locking shell, wherein one of the locking shell and the protective cover is provided with a clamping groove, and the other of the locking shell and the protective cover is provided with a clasp, and the clasp is matched with the clamping groove.

[0011] In one embodiment, the outer surface of the lock case is provided with the clamping groove, the inner surface of the protective cover is provided with the clamping buckle, the clamping buckle is provided with a guide slope, the distance from the guide slope to the inner surface of the protective cover gradually decreases along the direction in which the protective cover is installed to the lock case.

[0012] In one embodiment, the lock case comprises a first shell wall, a second shell wall, and a third shell wall connected between the first shell wall and the second shell wall, the first limiting hole penetrates through the first shell wall and the second shell wall; the protective cover comprises a first cover plate, a second cover plate, and a third cover plate connected between the first cover plate and the second cover plate, the first cover plate is attached to the first shell wall, the second cover plate is attached to the second shell wall, and the third cover plate is attached to the third shell wall.

[0013] In one embodiment, the protective cover covers the outside of the lock case, wherein:

[0014] The side of the first cover plate away from the first shell wall is provided with an identification part for indicating the installation direction of the protective cover; and / or, the side of the second cover plate away from the second shell wall is provided with an identification part for indicating the installation direction of the protective cover.

[0015] In one embodiment, the lock tongue assembly comprises a transmission arm and a lock tongue, at least part of the transmission arm is movably arranged in the lock case, the transmission arm is connected with the knob, the lock tongue is fixedly connected to one end of the transmission arm and can be extended or retracted relative to the lock case.

[0016] In one embodiment, the lock case has a length direction, the inner surface of the lock case is provided with a limiting boss, the limiting boss has a guide plane extending along the length direction, and the transmission arm is slidably arranged on the guide plane.

[0017] In one embodiment, the lock structure further comprises a resilient member, the resilient member is abutted between the side of the knob away from the lock tongue assembly and the side wall of the lock case, and the resilient member can be deformed outwardly of the lock case when the knob rotates.

[0018] In a second aspect, the utility model also provides a lock, which comprises a driving mechanism and any of the above locking structures, the driving mechanism is arranged on one side of the lock case, the driving mechanism is provided with an insertion rod, and the insertion rod is inserted into the knob.

[0019] The locking structure and the locking lockset provided by the utility model, the locking structure includes a locking lock case, a lock bolt assembly, a knob and a protective cover, the locking lock case is provided with a first limiting hole and an opening in communication with the first limiting hole, and the first limiting hole is in communication with the outside through the opening. The lock bolt assembly is movably arranged in the locking lock case; the knob can be assembled in the locking lock case through the opening, the knob is connected with the lock bolt assembly and is rotatably arranged in the locking lock case to drive the lock bolt assembly to extend or retract relative to the locking lock case; the protective cover is arranged on the locking lock case and can close the opening so that at least part of the knob is limited to be accommodated in the first limiting hole. In this way, the knob can be prevented from being separated from the locking lock case during rotation, and the stability of the locking structure during operation is improved.

[0020] These aspects or other aspects of the utility model will be more apparent in the following description of the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0022] Figure 1 is a structural schematic view of the locking structure provided by the utility model.

[0023] Figure 2 is Figure 1 is an exploded view of the locking structure (not including the lining plate and the second sleeve) shown.

[0024] Figure 3 is Figure 1 is a structural schematic view of the locking lock case and the first sleeve of the locking structure shown.

[0025] Figure 4 is Figure 1 is a structural schematic view of the protective cover shown.

[0026] Figure 5 is a structural schematic view of the locking lockset provided by the utility model.

[0027] The above drawings include the following reference signs:

[0028] Lock 1; locking structure 10; locking lock case 11; first limiting hole 110a; opening 110b; clamping groove 110c; first shell wall 111; second shell wall 112; third shell wall 113; limiting boss 114; guide plane 1142; lock tongue assembly 12; transmission arm 121; lock tongue 123; pusher 14; rotating part 141; slot 1412; circular arc surface 1414; first abutting surface 1416; second abutting surface 1418; push rod 143; protective cover 15; first cover plate 151; identification part 1512; second cover plate 152; third cover plate 153; second limiting hole 155; buckle 157; guide inclined surface 1572; elastic member 16; first sleeve 17; second sleeve 18; lining plate 19; driving mechanism 20; insertion rod 21. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the embodiments of the present application, the embodiments of the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the embodiments of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0031] The inventor of the present application found that the conventional locking pusher has a probability of falling out of the lock case during rotation, which reduces the operating stability of the locking, and most users have difficulty in reassembling the fallen pusher, so these lockings are often treated as scrap, which increases the use cost and is inconvenient for users to use.

[0032] Therefore, the present application provides a locking structure and a locking lock, which seals the opening of the locking lock case with a protective cover, so that the pusher is at least partially limited and accommodated in the first limiting hole, avoiding the pusher from being separated from the locking lock case during rotation, and improving the stability of the locking structure during operation. In the following, the locking structure and the locking lock provided by the present application will be described in detail in combination with specific embodiments and the drawings of the specification.

[0033] Please refer to Figure 1 and Figure 2The utility model provides a kind of locking structure 10, including locking lock shell 11, lock bolt assembly 12, push peach 14 and protective cover 15, locking lock shell 11 is equipped with first limit hole 110a and the opening 110b being communicated with first limit hole 110a, first limit hole 110a is communicated with outside through opening 110b.Lock bolt assembly 12 is movably arranged in locking lock shell 11;Push peach 14 can be assembled in locking lock shell 11 through opening 110b, push peach 14 is connected with lock bolt assembly 12, and it is rotatably arranged in locking lock shell 11, to drive lock bolt assembly 12 to extend or retract relative to locking lock shell 11;Protective cover 15 is arranged in locking lock shell 11, and opening 110b can be closed, to make at least part of push peach 14 limit and be contained in first limit hole 110a.

[0034] Specifically, locking lock shell 11 is generally hollow cuboid structure, for installing and accommodating push peach 14, lock bolt assembly 12 and the like structure.Locking lock shell 11 has length direction, width direction and thickness direction, for easy description, define length direction as X direction, width direction as Y direction, thickness direction as Z direction.

[0035] Locking lock shell 11 includes first shell wall 111, second shell wall 112 and third shell wall 113 connected between first shell wall 111 and second shell wall 112, wherein first shell wall 111 and second shell wall 112 are oppositely and spaced apart along Z direction, for example, first shell wall 111 is parallel with second shell wall 112.The plane where third shell wall 113 is located is parallel with Z direction, and third shell wall 113 can be attached with protective cover 15.

[0036] First limit hole 110a penetrates first shell wall 111 and second shell wall 112, i.e., first limit hole 110a extends along Z direction.First limit hole 110a can limit push peach 14 to limit the rotation angle of push peach 14, to avoid the separation of push peach 14 and lock bolt assembly 12 caused by the rotation angle of push peach 14 being too large.First limit hole 110a is generally arc-shaped hole.

[0037] Opening 110b is communicated with first limit hole 110a, and push peach 14 can be assembled in locking lock shell 11 through opening 110b.Specifically, first limit hole 110a is communicated with outside through opening 110b.The width of opening 110b gradually decreases along the direction of the central axis of first limit hole 110a to third shell wall 113, so that the side wall of opening 110b has the effect of guiding push peach 14 to be installed into locking lock shell 11, and the installation difficulty of push peach 14 is reduced.In the embodiment, opening 110b penetrates first shell wall 111 and second shell wall 112, and also penetrates third shell wall 113, so that push peach 14 can be installed into locking lock shell 11 along Y direction through opening 110b.

[0038] Please refer to Figure 2 andFigure 3 In the present embodiment, the inner surface of the locking case 11 is provided with a limiting boss 114, the limiting boss 114 has a guide plane 1142 extending along the length direction X, the guide plane 1142 is substantially parallel to the plane where the third case wall 113 is located, and can guide the moving direction of the latch bolt assembly 12, so that the latch bolt assembly 12 can smoothly extend or retract relative to the locking case 11. In the present embodiment, the number of the limiting boss 114 is two, and the two limiting bosses 114 are respectively arranged on the inner surfaces of the first case wall 111 and the second case wall 112. In other embodiments, the number of the limiting boss 114 can also be one, and it can be arranged on the inner surface of one of the first case wall 111 and the second case wall 112.

[0039] The latch bolt assembly 12 is movably arranged in the locking case 11 and can extend and retract relative to the locking case 11, wherein the extension of the latch bolt assembly 12 relative to the locking case 11 makes the locking structure 10 in the locked state; the retraction of the latch bolt assembly 12 relative to the locking case 11 makes the locking structure 10 in the unlocked state.

[0040] The latch bolt assembly 12 includes a transmission arm 121 and a latch bolt 123, at least part of the transmission arm 121 is movably arranged in the locking case 11, the transmission arm 121 is connected with the knob 14, so that the rotation of the knob 14 can drive the transmission arm 121 to move, thereby driving the latch bolt 123 to move. The latch bolt 123 is fixedly connected to one end of the transmission arm 121 and can extend or retract relative to the locking case 11. In the present embodiment, the latch bolt 123 is cylindrical. In other embodiments, the latch bolt 123 can also be cuboid or other shapes.

[0041] The transmission arm 121 is slidably arranged in the guide plane 1142, and the guide plane 1142 extends along the length direction X, so that the guide plane 1142 can guide the movement of the transmission arm 121, so that the movement of the transmission arm 121 is more smooth, and the transmission arm 121 will also move along the length direction under the driving of the knob 14.

[0042] The knob 14 is connected with the latch bolt assembly 12 and is rotatably arranged in the locking case 11 to drive the latch bolt assembly 12 to extend or retract relative to the locking case 11. In the present embodiment, the knob 14 can be inserted into the transmission arm 121, for example, an installation hole is formed on the transmission arm 121, and the knob 14 is arranged in the installation hole, so that the rotation of the knob 14 can drive the transmission arm 121 to move, thereby driving the latch bolt assembly 12 to move.

[0043] The poking peach 14 includes a rotating part 141 and a poking rod 143 arranged on the rotating part 141, wherein the rotating part 141 is substantially cylindrical, the rotating part 141 is limited to be accommodated in the first limiting hole 110a, and can rotate in the first limiting hole 110a. The rotating part 141 is provided with a T-shaped hole 1412 extending in the Z direction, which can cooperate with the plug rod 21 on the driving mechanism 20, so that the plug rod 21 can drive the poking peach 14 to rotate. The poking rod 143 is substantially long rod-shaped, the poking rod 143 extends radially outward from the rotating part 141, and the poking rod 143 is arranged in the mounting hole of the transmission arm 121.

[0044] The outer periphery of the rotating part 141 includes a circular arc surface 1414, a first abutting surface 1416 and a second abutting surface 1418 connected end to end, wherein the corresponding circular arc of the circular arc surface 1414 is substantially 3 / 4 of a circle, and the first abutting surface 1416 and the second abutting surface 1418 are perpendicular to each other. The poking rod 143 extends outward from the circular arc surface 1414.

[0045] The protective cover 15 is arranged on the locking lock shell 11 and can close the opening 110b, so that at least part of the poking peach 14 is limited to be accommodated in the first limiting hole 110a, which can avoid the poking peach 14 from being separated from the locking lock shell 11 during rotation, improve the stability of the locking structure 10 during operation, and avoid the scrapping of the locking structure 10 caused by the falling of the poking peach 14, reduce the use cost, and facilitate the user to use.

[0046] In this embodiment, the protective cover 15 covers the outside of the locking lock shell 11, so that the assembly convenience of the protective cover 15 can be improved. In other embodiments, the protective cover 15 can also be arranged inside the locking lock shell 11, for example, the protective cover 15 can be embedded in the locking lock shell 11, which meets the purpose of assembling the protective cover 15 to the locking lock shell 11.

[0047] Please refer to Figure 4 , the protective cover 15 includes a first cover plate 151, a second cover plate 152, and a third cover plate 153 connected between the first cover plate 151 and the second cover plate 152, so that the protective cover 15 is substantially U-shaped, wherein the first cover plate 151 is attached to the first shell wall 111, the second cover plate 152 is attached to the second shell wall 112, and the third cover plate 153 is attached to the third shell wall 113, that is, the protective cover 15 can substantially cover the entire outer surface of the locking lock shell 11, so as to protect the locking lock shell 11, thereby improving the overall rigidity of the locking structure 10 and reducing the probability of deformation of the locking structure 10 under external force.

[0048] In the embodiment, the first cover plate 151 is provided with an identification part 1512 on the side away from the first shell wall 111 for indicating the installation direction of the protective cover 15, that is, the identification part 1512 is arranged on the outer surface of the first cover plate 151 and can indicate the installation direction of the protective cover 15, further improving the convenience of installation of the protective cover 15. In the embodiment, the identification part 1512 can be a groove opened on the outer surface of the first cover plate 151, and the specific form of the identification part 1512 includes but is not limited to an arrow, English letters, Chinese characters, etc. In other embodiments, the identification part 1512 can be a protrusion opened on the outer surface of the first cover plate 151, as long as it can indicate the installation direction of the protective cover 15.

[0049] In the embodiment, the second cover plate 152 is provided with an identification part 1512 on the side away from the second shell wall 112 for indicating the installation direction of the protective cover 15, so that the operator can conveniently install the protective cover 15 to the locking case 11 from any side. In other embodiments, the second cover plate 152 can also not be provided with the identification part 1512.

[0050] The protective cover 15 is provided with a second limiting hole 155 corresponding in position to the first limiting hole 110a, and the profile of the second limiting hole 155 at least partially coincides with the profile of the first limiting hole 110a. The knob 14 is also limitedly accommodated in the second limiting hole 155, that is, the knob 14 is simultaneously limitedly accommodated in the first limiting hole 110a and the second limiting hole 155, further avoiding the knob 14 from being separated from the locking case 11 during rotation, thereby further improving the stability of the locking structure 10 during operation.

[0051] In the embodiment, the protective cover 15 is detachably connected with the locking case 11, improving the installation convenience of the protective cover 15 and thereby reducing the assembly difficulty of the locking structure 10. One of the locking case 11 and the protective cover 15 is provided with a clamping groove 110c, and the other is provided with a clasp 157, which cooperates with the clamping groove 110c, that is, the locking case 11 and the protective cover 15 are detachably connected by clamping. The locking case 11 and the protective cover 15 can also be connected by screws.

[0052] In other embodiments, the locking case 11 and the protective cover 15 can be fixedly connected, for example, by screws, or by welding or adhesion.

[0053] Please refer to Figure 2And, 4, in the embodiment, the outer surface of the locking shell 11 is provided with a clamping groove 110c, and the inner surface of the protective cover 15 is provided with a buckle 157. The buckle 157 is provided with a guide inclined surface 1572, which gradually decreases the distance from the inner surface of the protective cover 15 in the direction of the protective cover 15 being installed to the locking shell 11, so that the guide inclined surface 1572 can guide the protective cover 15 to be installed to the locking shell 11, and after the buckle 157 cooperates with the clamping groove 110c, the protective cover 15 can be prevented from being separated from the locking shell 11 as much as possible. In other embodiments, the outer surface of the locking shell 11 can be provided with the buckle 157, and the inner surface of the protective cover 15 can be provided with the clamping groove 110c.

[0054] The locking structure 10 further comprises an elastic member 16, which is abutted between the side of the knob 14 away from the bolt assembly 12 and the side wall of the locking shell 11. The elastic member 16 can be deformed outwardly of the locking shell 11 when the knob 14 is rotated, so as to elastically support the knob 14 when the knob 14 is rotated, so that the elastic member 16 can always abut the side of the knob 14 away from the bolt assembly 12, thereby increasing the hand feeling when the knob 14 is rotated.

[0055] Please continue to refer to Figure 1 In the embodiment, the locking structure 10 further comprises a first sleeve 17 and a second sleeve 18. The first sleeve 17 is connected with the locking shell 11, and the second sleeve 18 is arranged inside the first sleeve 17 and is sleeved on the outside of the bolt assembly 12. In the embodiment, the first sleeve 17 is integrally arranged with the locking shell 11. In other embodiments, the first sleeve 17 can also be welded or fixedly connected with the locking shell 11 in other ways.

[0056] The locking structure 10 further comprises a backing plate 19, which is connected to the end of the second sleeve 18 away from the locking shell 11. The backing plate 19 can be fixedly connected with the door plate, so as to fix the locking structure 10 with the door plate. The backing plate 19 is provided with a lock hole for the bolt 123 to extend out of.

[0057] The locking structure 10 provided by the utility model includes a locking lock shell 11, a lock bolt assembly 12, a knob 14 and a protective cover 15, the locking lock shell 11 is provided with a first limiting hole 110a and an opening 110b in communication with the first limiting hole 110a, the first limiting hole 110a is in communication with the outside through the opening 110b. The lock bolt assembly 12 is movably arranged in the locking lock shell 11, the knob 14 can be assembled in the locking lock shell 11 through the opening 110b, the knob 14 is connected with the lock bolt assembly 12 and rotatably arranged in the locking lock shell 11 to drive the lock bolt assembly 12 to extend or retract relative to the locking lock shell 11, the protective cover 15 is arranged in the locking lock shell 11 and can close the opening 110b so that at least part of the knob 14 is limited to be accommodated in the first limiting hole 110a. In this way, the knob 14 can be prevented from being separated from the locking lock shell 11 during rotation, and the stability of the locking structure 10 during operation is improved.

[0058] Please refer to Figure 5 The utility model also provides a locking lock 1, the locking lock 1 includes drive mechanism 20 and locking structure 10, drive mechanism 20 is arranged in the one side of locking lock shell 11, and drive mechanism 20 is equipped with the plug rod 21, and the plug rod 21 is inserted in the knob 14. Drive mechanism 20 can drive the knob 14 to rotate through the plug rod 21, thereby driving the lock bolt assembly 12 to extend or retract.

[0059] The locking lock 1 provided by the utility model can also prevent the knob 14 from being separated from the locking lock shell 11 during rotation, and the stability of the locking lock 1 during operation is improved.

[0060] In the present application, unless otherwise specified or limited, the term "assembly" and other terms should be understood broadly. For example, it can be fixedly connected, or detachably connected, or integrally connected, it can be mechanically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be internal communication of two elements, or it can be only surface contact, or surface contact connection through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] Moreover, the terms "first", "second", etc. are used only for distinguishing descriptions, and cannot be understood as specifically or particularly indicating or specifying structures. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the different embodiments or examples described in the present application and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0062] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A closure structure, characterized by The application relates to a lock structure, which comprises the following parts: a locking case, a lock tongue assembly, a knob, and a protective cover. The locking case is provided with a first limiting hole and an opening communicating with the first limiting hole. The lock tongue assembly is movably arranged in the locking case. The knob is capable of being assembled in the locking case through the opening, and is connected with the lock tongue assembly and movably arranged in the locking case to drive the lock tongue assembly to extend or retract relative to the locking case. The protective cover is arranged in the locking case and capable of closing the opening so that at least part of the knob is limited and accommodated in the first limiting hole. The protective cover is provided with a second limiting hole corresponding to the position of the first limiting hole, and the profile of the second limiting hole at least partially overlaps the profile of the first limiting hole, and the knob is also limited and accommodated in the second limiting hole.

2. The closure structure of claim 1, wherein The protective cover is detachably connected with the locking case, wherein one of the locking case and the protective cover is provided with a clamping groove, and the other is provided with a clamping buckle matched with the clamping groove.

3. The closure structure of claim 1, wherein The outer surface of the locking case is provided with the clamping groove, and the inner surface of the protective cover is provided with the clamping buckle, and the clamping buckle is provided with a guide inclined surface gradually reducing the distance to the inner surface of the protective cover along the direction of the protective cover being mounted to the locking case.

4. The closure structure of claim 3, wherein The locking case comprises a first shell wall, a second shell wall, and a third shell wall connected between the first shell wall and the second shell wall, and the first limiting hole penetrates through the first shell wall and the second shell wall; the protective cover comprises a first cover plate, a second cover plate, and a third cover plate connected between the first cover plate and the second cover plate, the first cover plate is attached to the first shell wall, the second cover plate is attached to the second shell wall, and the third cover plate is attached to the third shell wall.

5. The closure structure of claim 1, wherein The protective cover covers the outside of the locking case, wherein:

6. The closure structure of claim 5, wherein The side of the first cover plate away from the first shell wall is provided with an identification part for indicating the mounting direction of the protective cover; and / or the side of the second cover plate away from the second shell wall is provided with an identification part for indicating the mounting direction of the protective cover. The lock tongue assembly comprises a transmission arm and a lock tongue, at least part of the transmission arm is movably arranged in the locking case, the transmission arm is connected with the knob, and the lock tongue is fixedly connected to one end of the transmission arm and capable of extending or retracting relative to the locking case.

7. The closure structure of claim 1, wherein The locking case has a length direction, the inner surface of the locking case is provided with a limiting boss having a guide plane extending along the length direction, and the transmission arm is slidably arranged on the guide plane.

8. The closure structure of claim 7, wherein The locking structure further comprises an elastic member abutting between the side of the knob away from the lock tongue assembly and the side wall of the locking case, and the elastic member is capable of deforming outwardly of the locking case when the knob rotates.

9. The closure structure of claim 1, wherein ​ 10. A lock, comprising: The lock comprises a driving mechanism and the lock structure as claimed in any one of claims 1-9, the driving mechanism is arranged on one side of the lock housing, the driving mechanism is provided with a plug rod, and the plug rod is inserted into the knob.

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