Self-locking box and charging terminal

Abstract

The utility model relates to a self-locking box and a charging terminal. The self-locking box comprises a shell provided with a containing cavity; a first through hole for communicating the accommodating cavity with the outside is formed in the shell; the cover body is arranged at the cavity opening of the accommodating cavity in a covering manner; the clamping structure is arranged in the accommodating cavity so as to connect the shell and the cover body; the unlocking mechanism is arranged on the shell; and the unlocking mechanism is configured to extend into the accommodating cavity from the first through hole and act on the clamping structure, so that the clamping structure is converted into an unlocking state from a clamping state. Therefore, on one hand, keys of different charging terminals can be prevented from being confused; and on the other hand, maintenance personnel can quickly open the shell and the cover body without carrying a key during maintenance, so that the cover opening process is relatively simple, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of charging equipment, and in particular to a self-locking box and a charging terminal. Background Art

[0002] Charging terminals are devices that provide charging services for electric vehicles. They are mainly divided into floor-standing charging piles and wall-mounted charging piles. They are widely used in the current situation of the popularity of new energy vehicles. In order to improve the user experience, charging piles usually need to be repaired and upgraded. Traditional charging piles need to be opened during maintenance, and the matching key needs to be used to unlock the cover. In this way, it is not only easy to mix up the keys, but also makes the maintenance process more cumbersome, reducing the maintenance efficiency. Summary of the invention

[0003] Based on this, it is necessary to provide a self-locking box and a charging terminal that can improve maintenance efficiency in order to solve the above problems.

[0004] In a first aspect, an embodiment of the present application provides a self-locking box, comprising:

[0005] The housing has a housing cavity; the housing is provided with a first through hole connecting the housing cavity with the outside;

[0006] A cover body, which is arranged at the opening of the accommodating cavity;

[0007] A clamping structure, disposed in the accommodating cavity to connect the shell and the cover; and

[0008] The unlocking mechanism is arranged on the housing; the unlocking mechanism is configured to extend from the first through hole into the accommodating cavity and act on the clamping structure to transform the clamping structure from a clamping state to an unlocking state.

[0009] In one embodiment, the unlocking mechanism comprises:

[0010] a key head, which is inserted into the first through hole and can move in a direction toward or away from the accommodating cavity; the key head is used to apply a force to the clamping structure; and

[0011] The key handle is detachably arranged on the outer surface of the shell and is rotatably connected to the key head; the key handle is used to push the key head to move.

[0012] In one embodiment, a guide groove is provided on one of the hole wall of the first through hole and the key head, and a first guide protrusion is provided on the other of the hole wall of the first through hole and the key head; the first guide protrusion is arranged in the guide groove.

[0013] In one embodiment, the guide groove is provided on the hole wall of the first through hole, and the first guide protrusion is provided on the key head;

[0014] A second guide protrusion is provided on a side of the key handle away from the housing; the key handle is configured such that: when the key handle is extended into the first through hole, the second guide protrusion is provided in the guide groove.

[0015] In one embodiment, an end of the key head away from the key handle is located in the accommodating cavity;

[0016] A first limiting protrusion is provided on a side of the key head away from the first guide protrusion, and the first limiting protrusion is arranged in the accommodating cavity.

[0017] In one embodiment, an avoidance groove is provided at one end of the key head close to the key handle, and a connecting hole is provided on the groove wall of the avoidance groove;

[0018] The key handle includes a main body and a first extension portion connected to the main body, a rotating shaft is provided on the first extension portion, at least a portion of the first extension portion is arranged in the avoidance groove, and the rotating shaft passes through the connecting hole.

[0019] In one embodiment, the snap-fit ​​structure includes a snap buckle and a snap slot, one of the snap buckle and the snap slot is disposed on the housing, and the other of the snap buckle and the snap slot is disposed on the cover;

[0020] The key head is used to apply a force to the buckle so that the buckle is separated from the slot.

[0021] In one embodiment, the buckle is disposed on a side of the cover body close to the accommodating cavity; a second extension portion is disposed on the cavity wall of the accommodating cavity, the second extension portion extends in a direction away from the cavity wall, and the card slot is disposed on the second extension portion;

[0022] Wherein, the second extension portion is provided on at least one side of the first through hole along the first direction; and the key head is used to drive the buckle to move along the first direction.

[0023] In one of the embodiments, a guide surface is provided at one end of the key head away from the key handle, and the guide surface is located on a side surface of the key head close to the buckle along the first direction.

[0024] In one of the embodiments, a second limiting protrusion is provided on a side of the key handle close to the housing.

[0025] In one of the embodiments, a fence is provided on the outer surface of the shell, and the fence and the outer surface of the shell are arranged to form a receiving groove, the receiving groove is communicated with the first through hole, and the key handle is assembled in the receiving groove.

[0026] In one embodiment, an assembly column is provided in the receiving groove, and an assembly hole is provided on the key handle, and the assembly hole is assembled with the assembly column.

[0027] In one embodiment, the assembly column is connected to the assembly hole by interference fit.

[0028] In one embodiment, the assembly column includes a first column and a second column, one end of the first column is connected to the housing, the other end of the first column is connected to the second column, and the outer diameter of the second column is greater than the outer diameter of the first column;

[0029] Wherein, the second column is a deformable structure and is interference fit with the assembly hole.

[0030] In one of the embodiments, a plug connector is provided on one side of the cover body close to the accommodating cavity, and a slot matching with the plug connector is provided on the shell.

[0031] In a second aspect, an embodiment of the present application provides a charging terminal, comprising the self-locking box in any embodiment of the first aspect.

[0032] The self-locking box and charging terminal provided in the embodiment of the present application can lock the housing and the cover by setting a snap-fit ​​structure, and can unlock the snap-fit ​​structure without a key by setting an unlocking mechanism on the housing. In this way, on the one hand, it is possible to avoid mixing up the keys of different charging terminals; on the other hand, during maintenance, maintenance personnel do not need to carry a key and can quickly open the housing and the cover, making the opening process relatively simple and improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] FIG1 is a schematic structural diagram of a self-locking box in a first state provided by an embodiment of the present application.

[0035] FIG. 2 is a schematic structural diagram of the self-locking box shown in FIG. 1 in a second state.

[0036] FIG. 3 is a schematic diagram of the internal structure of the self-locking box shown in FIG. 1 .

[0037] FIG. 4 is an exploded view of the self-locking box shown in FIG. 1 at a first viewing angle.

[0038] FIG. 5 is an exploded view of the self-locking box shown in FIG. 1 at a second viewing angle.

[0039] FIG. 6 is a schematic structural diagram of the unlocking mechanism of the self-locking box shown in FIG. 1 .

[0040] FIG. 7 is an exploded view of the unlocking mechanism shown in FIG. 6 .

[0041] FIG8 is a schematic diagram of the structure of a charging terminal provided in an embodiment of the present application.

[0042] Description of reference numerals:

[0043] 1. Charging terminal; 10. Self-locking box; 11. Shell; 111. Accommodating cavity; 112. First through hole; 113. Guide groove; 114. Second extension; 115. Fence; 116. Accommodating groove; 117. Assembly column; 1171. First column; 1172. Second column; 118. Slot; 12. Cover; 121. Plug connector; 13. Card connection structure; 131. Buckle; 132. Card slot; 14 , unlocking mechanism; 141, key head; 1411, first guide protrusion; 1412, first limit protrusion; 1413, avoidance groove; 1414, connecting hole; 1415, guide surface; 142, key handle; 1421, main body; 1422, first extension part; 1423, rotating shaft; 1424, second guide protrusion; 1425, second limit protrusion; 1426, assembly hole; 20, charging pile body. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0045] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0046] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0048] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0050] In the first aspect, as shown in Figures 1, 2, 3, 4 and 5, an embodiment of the present application provides a self-locking box 10, which includes a shell 11, a cover 12, a snap-on structure 13 and an unlocking mechanism 14. Among them, the shell 11 has a accommodating chamber 111. A first through hole 112 connecting the accommodating chamber 111 with the outside is provided on the shell 11. The cover 12 is covered at the cavity opening of the accommodating chamber 111. The snap-on structure 13 is provided in the accommodating chamber 111 to connect the shell 11 and the cover 12. The unlocking mechanism 14 is provided on the shell 11, and the unlocking mechanism 14 is configured as: extending from the first through hole 112 into the accommodating chamber 111 and acting on the snap-on structure 13, so that the snap-on structure 13 is converted from a snap-on state to an unlocked state.

[0051] Here, the unlocking mechanism 14 is equivalent to a component assembled on the housing 11 and used to unlock the clamping structure 13. When unlocking is not required, the unlocking mechanism 14 is assembled on the housing 11. When unlocking is required, the operator extends the unlocking mechanism 14 from the first through hole 112 into the accommodating cavity 111 and applies a force to the clamping structure 13, so that the clamping structure 13 is converted from a clamping state to an unlocking state.

[0052] In the embodiment of the present application, the housing 11 and the cover 12 can be locked by providing a snap-fit ​​structure 13, and the snap-fit ​​structure 13 can be unlocked without a key by providing an unlocking mechanism 14 on the housing 11. In this way, on the one hand, it is possible to avoid mixing up the keys of different charging terminals; on the other hand, during maintenance, maintenance personnel do not need to carry a key and can quickly open the housing 11 and the cover 12, making the opening process relatively simple and improving maintenance efficiency.

[0053] It should be noted that the self-locking box 10 in the embodiment of the present application may include two clamping structures 13 and two unlocking mechanisms 14, each unlocking mechanism 14 corresponds to one clamping structure 13, and the two clamping structures 13 may be arranged on two opposite shell walls of the shell 11. It is understandable that the self-locking box 10 may also include only one clamping structure 13 and one unlocking mechanism 14, and the embodiment of the present application does not limit the number of the clamping structures 13 and the unlocking mechanisms 14.

[0054] In one embodiment, the unlocking mechanism 14 includes a key head 141 and a key handle 142. The key head 141 is inserted into the first through hole 112 and can move in a direction toward or away from the accommodating cavity 111, that is, the key head 141 is slidably disposed in the first through hole 112. The key head 141 is used to apply a force to the clamping structure 13. The key handle 142 is detachably disposed on the outer surface of the housing 11 and is rotatably connected to the key head 141. The key handle 142 is used to push the key head 141 to move.

[0055] Here, the key head 141 is used to unlock the clamping structure 13. The key handle 142 can be assembled on the housing 11, which plays an assembly role on the one hand, and on the other hand, during the unlocking process, the operator can hold the key handle 142 to apply force to reduce the difficulty of unlocking. In addition, the key head 141 is arranged in the first through hole 112, so that the key head 141 can be hidden, thereby improving the safety of the self-locking box 10.

[0056] It should be noted that the key handle 142 is detachably arranged on the outer surface of the housing 11, so that when unlocking is not required, the key handle 142 can be assembled on the housing 11, and when unlocking is required, the key handle 142 is removed from the housing 11, and the operator holds the key handle 142 to unlock. It is understandable that the key handle 142 can be bonded to the outer surface of the housing 11.

[0057] In one embodiment, as shown in FIGS. 1 to 7 , a guide groove 113 is provided on one of the hole wall of the first through hole 112 and the key head 141, and a first guide protrusion 1411 is provided on the other of the hole wall of the first through hole 112 and the key head 141. The first guide protrusion 1411 is disposed in the guide groove 113. In this way, during the sliding process of the key head 141, the sliding direction of the key head 141 can be ensured not to deflect, thereby preventing the key head 141 from being misplaced.

[0058] In one embodiment, a guide groove 113 is provided on the hole wall of the first through hole 112, and a first guide protrusion 1411 is provided on the key head 141. A second guide protrusion 1424 is provided on a side of the key handle 142 away from the housing 11. The key handle 142 is configured such that: when the key handle 142 is inserted into the first through hole 112, the second guide protrusion 1424 is provided in the guide groove 113.

[0059] Thus, when the key handle 142 is inserted into the first through hole 112, the second guide protrusion 1424 on the key handle 142 cooperates with the guide groove 113 to guide the movement direction of the key handle 142 and prevent the key handle 142 from being misplaced. Furthermore, the force direction of the key handle 142 can be guided, which is conducive to unlocking the clamping structure 13.

[0060] It is understandable that, during the process of removing the key handle 142 from the housing 11 , the operator can also pinch the second guide protrusion 1424 by fingers to remove the key handle 142 , thereby improving the removal efficiency.

[0061] In one embodiment, one end of the key head 141 away from the key handle 142 is located in the accommodating cavity 111. A first limiting protrusion 1412 is provided on one side of the key head 141 away from the first guide protrusion 1411, and the first limiting protrusion 1412 is provided in the accommodating cavity 111, that is, the first limiting protrusion 1412 is provided at one end of the key head 141 away from the key handle 142. In this way, the key head 141 can be prevented from being pulled out of the first through hole 112, avoiding the risk of loss of the unlocking mechanism 14 due to falling.

[0062] In one embodiment, as shown in FIG. 6 and FIG. 7 , a key head 141 is provided with an avoidance groove 1413 at one end close to the key handle 142, and a connecting hole 1414 is provided on the groove wall of the avoidance groove 1413. The key handle 142 includes a main body 1421 and a first extension part 1422 connected to the main body 1421, and a rotating shaft 1423 is provided on the first extension part 1422, at least a part of the first extension part 1422 is disposed in the avoidance groove 1413, and the rotating shaft 1423 is passed through the connecting hole 1414. In this way, the connection structure between the key head 141 and the key handle 142 can be made simpler, and the manufacturing cost can be reduced.

[0063] In one embodiment, the snap-fit ​​structure 13 includes a snap 131 and a slot 132, one of which is disposed on the housing 11, and the other of which is disposed on the cover 12. The key head 141 is used to apply a force to the snap 131 so that the snap 131 is disengaged from the slot 132. It should be noted that, during the unlocking process, the key head 141 applies a force to the snap 131, and the snap 131 is disengaged from the slot 132 after being deformed.

[0064] The above arrangement can make the clamping structure 13 relatively simple, and reduce the complexity of the unlocking process of the clamping structure 13.

[0065] It should be noted that the snap-fit ​​structure 13 may include a set of snaps 131 and slots 132 , or may include multiple sets of snaps 131 and slots 132 . The embodiment of the present application does not limit the number of snaps 131 and slots 132 .

[0066] In one embodiment, the buckle 131 is disposed on a side of the cover 12 close to the accommodating cavity 111. A second extension portion 114 is disposed on the cavity wall of the accommodating cavity 111, and the second extension portion 114 extends in a direction away from the cavity wall, and the slot 132 is disposed on the second extension portion 114. The second extension portion 114 is disposed on at least one side of the first through hole 112 along the first direction X. The key head 141 is used to drive the buckle 131 to move along the first direction X. In this way, by disposing the second extension portion 114, on the one hand, the slot 132 can be disposed on the second extension portion 114, and on the other hand, the structural strength of the housing 11 can be improved.

[0067] In a specific embodiment, two second extensions 114 are provided in the accommodating cavity 111, and the two second extensions 114 are respectively located on both sides of the first through hole 112 along the first direction X, and each second extension 114 is provided with a card slot 132, and correspondingly, the cover body 12 is also provided with two buckles 131. In this way, during the unlocking process of the key head 141, the key head 141 contacts the buckles 131 at both sides along the first direction X at the same time, so that the force on both sides of the key head 141 is uniform, the key head 141 is prevented from being deflected, and the stability of the unlocking process is improved.

[0068] It is understandable that the locations of the buckle 131 and the slot 132 may be different from those in the above embodiment. Specifically, the buckle 131 is disposed on the housing 11 , and the slot 132 is disposed on the cover 12 .

[0069] In one embodiment, a guide surface 1415 is provided at one end of the key head 141 away from the key handle 142, and the guide surface 1415 is located on a side surface of the key head 141 close to the buckle 131 along the first direction X. Specifically, during the unlocking process of the key head 141, the guide surface 1415 first contacts the buckle 131, and as the insertion depth of the key head 141 gradually increases, the side surface of the key head 141 contacts the buckle 131, thereby unlocking the buckle 131. The provision of the guide surface 1415 can reduce the difficulty of unlocking.

[0070] It is understandable that the guide surface 1415 can be an inclined surface, a curved surface or a curved surface.

[0071] In one embodiment, a second limiting protrusion 1425 is provided on one side of the key handle 142 close to the housing 11. The second limiting protrusion 1425 can prevent the key handle 142 from falling into the accommodating cavity 111 from the first through hole 112, and can also facilitate the operator to apply force during unlocking.

[0072] In one embodiment, a fence 115 is provided on the outer surface of the housing 11, and the fence 115 and the outer surface of the housing 11 are surrounded to form a receiving groove 116, the receiving groove 116 is communicated with the first through hole 112, and the key handle 142 is assembled in the receiving groove 116. By providing the fence 115, the key handle 142 can be hidden, thereby improving the safety of the self-locking box 10.

[0073] It should be noted that the guide groove 113 on the first through hole 112 may also extend to the groove wall of the receiving groove 116 , that is, the groove wall of the receiving groove 116 is also provided with the guide groove 113 .

[0074] In one embodiment, a mounting post 117 is provided in the receiving groove 116, and a mounting hole 1426 is provided on the key handle 142, and the mounting hole 1426 cooperates with the mounting post 117 for assembly. In this way, when unlocking is not required, the key handle 142 can be assembled in the receiving groove 116. By providing the mounting post 117 and the mounting hole 1426, the difficulty of assembly can be reduced.

[0075] In one embodiment, the assembly column 117 is connected with the assembly hole 1426 by interference fit. In this way, the assembly stability of the key handle 142 can be improved, so that the key handle 142 is not easy to fall off.

[0076] In one embodiment, the assembly column 117 includes a first column 1171 and a second column 1172, one end of the first column 1171 is connected to the housing 11, and the other end of the first column 1171 is connected to the second column 1172, and the outer diameter of the second column 1172 is greater than the outer diameter of the first column 1171. The second column 1172 is a deformable structure and is interference-fitted with the assembly hole 1426. In this way, on the one hand, the assembly stability can be improved, and on the other hand, the service life of the assembly column 117 can be improved. Furthermore, after multiple uses, the second column 1172 can still be connected to the assembly hole 1426 by interference fit, thereby ensuring that the key handle 142 always has good assembly stability.

[0077] In one embodiment, a plug connector 121 is provided on one side of the cover 12 close to the accommodating cavity 111, and a slot 118 is provided on the housing 11 to match the plug connector 121. In this way, the cover 12 and the housing 11 can also be plugged in. In this way, the combination of plugging and snapping can improve the assembly stability of the cover 12 and the housing 11.

[0078] It should be noted that the plug connector 121 and the buckle 131 are respectively arranged at opposite ends of the cover body 12. In this way, when assembling the cover body 12, the plug connector 121 is first inserted into the slot 118, and then the buckle 131 is snapped into the slot 132. Further, when unlocking is required, the key handle 142 is removed from the housing 11, and the key handle 142 is rotated so that the key handle 142 and the key head 141 are kept horizontal, and the key handle 142 is manually pushed, and the key handle 142 and the key head 141 are simultaneously extended into the accommodating cavity 111, and the key head 141 pushes the buckle 131 open, and the buckle 131 is separated from the slot 132, thereby achieving unlocking.

[0079] In a second aspect, as shown in FIG. 8 , an embodiment of the present application provides a charging terminal 1 , comprising the self-locking box 10 in any one of the embodiments in the first aspect.

[0080] Specifically, the charging terminal 1 may include a charging pile body 20, and the self-locking box 10 is disposed on the charging pile body 20. Exemplarily, electronic components may be disposed in the self-locking box 10.

[0081] The charging terminal 1 provided in the embodiment of the present application can lock the housing 11 and the cover 12 by providing a snap-fit ​​structure 13, and can unlock the snap-fit ​​structure 13 without a key by providing an unlocking mechanism 14 on the housing 11. In this way, on the one hand, it is possible to avoid mixing up the keys of different charging terminals; on the other hand, during maintenance, maintenance personnel can quickly open the housing 11 and the cover 12 without carrying a key, making the opening process simpler and improving maintenance efficiency.

[0082] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A self-locking box, characterized in that: include: The housing has a housing cavity; the housing is provided with a first through hole connecting the housing cavity with the outside; A cover body, which is arranged at the opening of the accommodating cavity; A clamping structure, disposed in the accommodating cavity to connect the shell and the cover; and The unlocking mechanism is arranged on the housing; the unlocking mechanism is configured to extend from the first through hole into the accommodating cavity and act on the clamping structure to transform the clamping structure from a clamping state to an unlocking state.

2. The self-locking box according to claim 1, characterized in that: The unlocking mechanism comprises: a key head, which is inserted into the first through hole and can move in a direction toward or away from the accommodating cavity; the key head is used to apply a force to the clamping structure; and The key handle is detachably arranged on the outer surface of the shell and is rotatably connected to the key head; the key handle is used to push the key head to move.

3. The self-locking box according to claim 2, characterized in that: A guide groove is provided on one of the hole wall of the first through hole and the key head, and a first guide protrusion is provided on the other of the hole wall of the first through hole and the key head; the first guide protrusion is arranged in the guide groove.

4. The self-locking box according to claim 3, characterized in that: The guide groove is provided on the hole wall of the first through hole, and the first guide protrusion is provided on the key head; A second guide protrusion is provided on a side of the key handle away from the housing; the key handle is configured such that: when the key handle is extended into the first through hole, the second guide protrusion is provided in the guide groove.

5. The self-locking box according to claim 4, characterized in that: One end of the key head away from the key handle is located in the accommodating cavity; A first limiting protrusion is provided on a side of the key head away from the first guide protrusion, and the first limiting protrusion is arranged in the accommodating cavity.

6. The self-locking box according to claim 2, characterized in that: An avoidance groove is provided at one end of the key head close to the key handle, and a connecting hole is provided on the groove wall of the avoidance groove; The key handle includes a main body and a first extension portion connected to the main body, a rotating shaft is provided on the first extension portion, at least a portion of the first extension portion is arranged in the avoidance groove, and the rotating shaft passes through the connecting hole.

7. The self-locking box according to claim 2, characterized in that: The clamping structure includes a buckle and a clamping slot, one of the buckle and the clamping slot is arranged on the shell, and the other of the buckle and the clamping slot is arranged on the cover; The key head is used to apply a force to the buckle so that the buckle is separated from the slot.

8. The self-locking box according to claim 7, characterized in that: The buckle is arranged on a side of the cover body close to the accommodating cavity; a second extension portion is arranged on the cavity wall of the accommodating cavity, the second extension portion extends in a direction away from the cavity wall, and the card slot is arranged on the second extension portion; Wherein, the second extension portion is provided on at least one side of the first through hole along the first direction; and the key head is used to drive the buckle to move along the first direction.

9. The self-locking box according to claim 8, characterized in that: A guide surface is provided at one end of the key head away from the key handle, and the guide surface is located on a side surface of the key head close to the buckle along the first direction.

10. The self-locking box according to claim 2, characterized in that: A second limiting protrusion is provided on one side of the key handle close to the shell.

11. The self-locking box according to claim 2, characterized in that: The outer surface of the shell is provided with a fence, the fence and the outer surface of the shell are surrounded to form a receiving groove, the receiving groove is communicated with the first through hole, and the key handle is assembled in the receiving groove.

12. The self-locking box according to claim 11, characterized in that: An assembly column is arranged in the receiving groove, and an assembly hole is arranged on the key handle, and the assembly hole is assembled in cooperation with the assembly column.

13. The self-locking box according to claim 12, characterized in that: The assembly column is connected to the assembly hole by interference fit.

14. The self-locking box according to claim 13, characterized in that: The assembly column includes a first column and a second column, one end of the first column is connected to the housing, the other end of the first column is connected to the second column, and the outer diameter of the second column is greater than the outer diameter of the first column; Wherein, the second column is a deformable structure and is interference fit with the assembly hole.

15. The self-locking box according to any one of claims 1 to 14, characterized in that: A plug connector is provided on one side of the cover body close to the accommodating cavity, and a slot matched with the plug connector is provided on the shell body.

16. A charging terminal, characterized in that: Comprising a self-locking box as described in any one of claims 1-15.

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