Box body and BDU

Abstract

The utility model provides a box body and a BDU, relates to the technical field of battery packs, and aims to optimize a shell structure to a certain extent, improve the assembly efficiency and avoid the problem that the connection position of a base and an upper cover is damaged during disassembly. The box body provided by the utility model comprises a base which comprises an inner cavity, a containing groove, a communicating groove and an inserting groove are formed in the side wall forming the inner cavity in the Y direction, and the communicating groove and the inserting groove are both communicated with the containing groove; the upper cover covers the opening end of the inner cavity; the self-locking assembly comprises a rotating component and a locking component; the locking component is arranged in the containing groove in the Y direction, a pushing part of the locking component extends out of the communicating groove, and the locking component can move between a first position and a second position in the containing groove by pushing or releasing the pushing part; the rotating component is rotationally connected with the upper cover, part of the rotating component is inserted into the inserting groove in the Z direction, and when the locking component is located at the first position, the rotating component can be pulled to be staggered with the inserting groove, and the rotating component is locked.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field especially is related to a box and BDU. BACKGROUND

[0002] BDU (Battery Disconnect Unit) is an important part of high-voltage circuit in new energy vehicles, and when the BDU is tested or overhauled, the base and the upper cover are usually disassembled and separated, but the connection between the base and the upper cover is damaged at the present stage, resulting in the base being scrapped and unable to be used again, which greatly increases the overhaul and test cost.

[0003] Therefore, it is urgent to provide a box and BDU to solve the problems existing in the prior art to some extent. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a box and BDU to optimize the shell structure to some extent, improve the assembly efficiency, and avoid damage to the connection position of the base and the upper cover during disassembly.

[0005] In a first aspect, the utility model provides a box, which comprises: a base comprising an inner cavity, a containing groove, a communicating groove and a plug-in groove are formed on the side wall along the Y direction of the inner cavity, the communicating groove and the plug-in groove are both communicated with the containing groove, and the Y direction is the width direction of the box; an upper cover covering the open end of the inner cavity; a self-locking assembly comprising a rotating member and a locking member; the locking member is arranged in the containing groove along the Y direction, and the pushing part of the locking member protrudes out of the communicating groove, and the pushing part can move the locking member in the containing groove between a first position and a second position; the rotating member is rotationally connected with the upper cover, and part of the rotating member is inserted into the plug-in groove along the Z direction, and the locking member can dislocate the rotating member from the plug-in groove and lock the rotating member when the locking member is at the first position, and the Z direction is the height direction of the box.

[0006] Among them, the position of the base corresponding to the plug-in groove is formed with two relatively arranged positioning columns along the X direction, the rotating member is located between the two positioning columns and rotationally connected with the positioning columns, and the X direction is the length direction of the box.

[0007] Specifically, the positioning column is formed with a positioning hole, the side wall of the rotating member is formed with a connecting convex part, the connecting convex part is inserted into the positioning hole and rotationally connected with the positioning column, and the distance from the end face of the first end of the rotating member to the connecting convex part is less than the distance from the end face of the second end of the rotating member to the connecting convex part.

[0008] Further, the locking member comprises an elastic piece, the elastic piece is located in the accommodating groove along the Y direction, one end of the elastic piece abuts against the side wall in the accommodating groove, and the other end abuts against one end of the locking member away from the pushing part.

[0009] Further, one end of the locking member away from the pushing part is formed with a first limiting part, one end of the elastic piece away from the side wall of the accommodating groove abuts against the first limiting part; the pushing part is formed with a second limiting part along the Z direction, and the second limiting part is located on the side of the communicating groove away from the accommodating groove.

[0010] Wherein, the box provided by the utility model further comprises a limiting plate, the limiting plate is connected with the side wall surface of the base, and the limiting plate is formed with a through hole at the position corresponding to the accommodating groove, one end of the pushing part can pass through the through hole, and the second limiting part abuts against the side of the limiting plate facing the base.

[0011] Specifically, the limiting plate is formed with a movable groove at the position corresponding to the accommodating groove and facing the side of the base along the Y direction, the movable groove and the side wall of the base form a limiting space, and the second limiting part moves between the side wall of the base and the movable groove along the Y direction.

[0012] Further, the limiting plate and the base are hot melt connected.

[0013] Further, the first limiting part is formed with a first inclined surface away from one side of the elastic piece along the Y direction, the rotating member is formed with a second inclined surface, and the first inclined surface and the second inclined surface are fitted when the rotating member is inserted into the insertion groove.

[0014] In the second aspect, the utility model provides a kind of BDU, comprising the box of any one in the above first aspect.

[0015] Compared with prior art, the box provided by the utility model has the following advantages:

[0016] The box provided by the utility model, comprising: base, comprising inner cavity, accommodating groove, communicating groove and insertion groove are arranged on the side wall along Y direction of the formed inner cavity, and the communicating groove and the insertion groove are both communicated with the accommodating groove; upper cover, which is closed to the opening end of the inner cavity; self-locking assembly, which comprises rotating member and locking member; the locking member is arranged in the accommodating groove along Y direction, and the pushing part of the locking member extends out of the communicating groove, and the pushing or releasing of the pushing part can make the locking member move in the accommodating groove between the first position and the second position; the rotating member is rotationally connected with the upper cover, and part of the rotating member is inserted into the insertion groove along Z direction, and the locking member can dislocate the insertion groove when the rotating member is pulled when the locking member is in the first position, and the rotating member is locked.

[0017] Therefore, the analysis shows that the accommodating groove formed by the base can accommodate the locking member, and the insertion groove can make the rotating member connected with the upper cover inserted into the accommodating groove from the insertion groove, and since the pushing part of the locking member in the application can extend out of the communicating groove, and the pushing or releasing of the pushing part can make the locking member move in the accommodating groove between the first position and the second position, when the rotating member is inserted into the accommodating groove from the insertion groove, the locking member can be changed from the second position to the first position, the rotating member can be pulled, and the rotating member can be dislocated with the insertion groove, so that the locking between the base and the upper cover can be realized.

[0018] When the upper cover and the base need to be unlocked, the pushing part is released, so that the locking member can be moved from the first position to the second position, and then the rotating member returns to the initial state of being inserted into the accommodating groove, that is, the rotating member and the insertion groove are in the normal state, and the rotating member can be pulled out of the insertion groove, so that the separation between the base and the upper cover can be realized.

[0019] Therefore, the application can realize the locking and unlocking between the base and the upper cover by inserting the rotating member into the insertion groove and cooperating with the conversion of the locking member between the first position and the second position, so that the damage of the connection position when the base is disassembled can be avoided, the problem that the base cannot be used again and the maintenance and testing cost is increased can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0021] Figure 1 The exploded structural schematic view of the box provided by the embodiment of the utility model;

[0022] Figure 2 For Figure 1 The local enlarged view of A in the middle

[0023] Figure 3 An assembly schematic view of the locking member and the base in the box is provided for the embodiment of the utility model;

[0024] Figure 4 A structure schematic view of the locking member and the elastic piece in the box is provided for the embodiment of the utility model;

[0025] Figure 5 A structure schematic view of the rotating member in the box is provided for the embodiment of the utility model.

[0026] In the drawing: 1-base; 101-receiving groove; 102-slot; 103-communication groove; 104-cavity; 2-upper cover; 201-positioning column; 2011-positioning hole; 3-rotating member; 301-connection convex part; 302-second inclined surface; 303-first end; 304-second end; 4-locking member; 401-first limiting part; 4011-first inclined surface; 402-second limiting part; 403-pushing part; 6-elastic piece; 7-limiting plate; 701-moving groove; 702-perforation. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] In the description of the embodiments of the present application, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when the utility model product is used, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0029] Furthermore, terms like "horizontal," "vertical," and the like are used herein for ease of description to define one element's relationship to another element as the drawing figures are configured. It is do not intend these terms to mean that the element has to be absolutely horizontal or absolutely vertical. For example, "horizontal" can mean that the element is more horizontal than "vertical" but it can still be slightly tilted.

[0030] In the description of the embodiments of the present application, it should be noted that unless specifically stated and limited otherwise, the terms "set," "mount," "communication," "connection" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of the listed items.

[0032] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" can be used herein to describe the relationship of one element to another element as shown in the drawings. Such spatial relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings.

[0033] The terms used herein are only used to describe various examples and not to limit the present disclosure. The singular form is intended to include the plural form unless the context clearly indicates otherwise. The terms "include", "contain" and "have" enumerate the existence of the stated features, numbers, operations, components, elements and / or combinations thereof, but do not exclude the existence or addition of one or more other features, numbers, operations, components, elements and / or combinations thereof.

[0034] Due to manufacturing techniques and / or tolerances, variations in the shapes of the structures shown in the drawings can occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings, but include variations in the shapes that occur during manufacturing.

[0035] The features of the examples described herein can be combined in various ways as will be apparent after the disclosure of the present application is understood. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after the disclosure of the present application is understood. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection claimed by the present application.

[0036] As Figure 1 In combination Figure 2 As shown in the utility model provides a kind of box, including base 1, upper cover 2 and self-locking component;Base 1 includes inner cavity 104, inner cavity 104 is formed with containing groove 101, communicating groove 103 and insertion slot 102 on the side wall along Y direction, communicating groove 103 and insertion slot 102 are all communicated with containing groove 101, self-locking component includes rotating member 3 and locking member 4, locking member 4 is set in containing groove 101 along Y direction, and the push portion 403 of locking member 4 extends out communicating groove 103, and push or release push portion 403 can make locking member 4 move between first position and second position in containing groove 101;Rotating member 3 is rotatably connected with base 1, and rotating member 3 is inserted into insertion slot 102 along Z direction, locking member 4 can be pulled rotating member 3 and insertion slot 102 is out of position when in first position, and locking rotating member 3.

[0037] Relative to prior art, the utility model provides the box with following advantages:

[0038] The utility model provides a box, containing groove 101 formed by base 1 can accommodate locking member 4, and insertion slot 102 can make rotating member 3 connected with upper cover 2 by insertion slot 102 and inserted into containing groove 101, because the push portion 403 of locking member 4 in the application can extend out communicating groove 103, and push or release push portion 403 can make locking member 4 move between first position and second position in containing groove 101, therefore, when rotating member 3 is inserted into containing groove 101 by insertion slot 102, by changing locking member 4 from second position to first position, rotating member 3 can be pulled, so that rotating member 3 and insertion slot 102 are out of position, so that the locking between base 1 and upper cover 2 can be realized.

[0039] And when needing to unlock upper cover 2 and base 1, release push portion 403, so that locking member 4 can be moved from first position to second position, and then rotating member 3 returns to the initial state of being inserted into containing groove 101, i.e. rotating member 3 and insertion slot 102 are in the order state, and rotating member 3 can be pulled out of insertion slot 102, so that the separation between base 1 and upper cover 2 is realized.

[0040] Therefore, the locking and unlocking between base 1 and upper cover 2 can be realized by inserting rotating member 3 into insertion slot 102 and cooperating with the conversion of locking member 4 between first position and second position, so that the problem of damage to the connection position when base 1 is disassembled, resulting in that base 1 cannot be used again and increasing the maintenance and testing cost is avoided.

[0041] It should be noted that the locking member 4 in the present application can adopt a spring structure. When the spring is pressed, one end located in the accommodating groove 101 can extend and always remain in the extended state. When the spring is pressed again, the one end located in the accommodating groove 101 can be retracted. Therefore, when the rotating member 3 enters the accommodating groove 101, the locking member 4 can be converted from the second position to the first position by pressing the spring. Since the one end located in the accommodating groove 101 extends, the rotating member 3 can be pushed to be offset, the rotating member 3 is dislocated with the insertion groove 102, and the locking action between the upper cover 2 and the cover plate is completed.

[0042] When unlocking is needed, the spring is pressed again, the one end located in the accommodating groove 101 can be retracted, so that the one end located in the accommodating groove 101 is separated from the rotating member 3. The rotating member 3 returns to the natural drooping state under the action of its own gravity, so as to achieve the above-mentioned state of being in line with the insertion groove 102, and then the unlocking between the base 1 and the upper cover 2 is realized.

[0043] Optionally, as shown in Figure 1 Combined with Figure 2 It should be noted that the locking member 4 in the present application can adopt a spring structure. When the spring is pressed, one end located in the accommodating groove 101 can extend and always remain in the extended state. When the spring is pressed again, the one end located in the accommodating groove 101 can be retracted. Therefore, when the rotating member 3 enters the accommodating groove 101, the locking member 4 can be converted from the second position to the first position by pressing the spring. Since the one end located in the accommodating groove 101 extends, the rotating member 3 can be pushed to be offset, the rotating member 3 is dislocated with the insertion groove 102, and the locking action between the upper cover 2 and the cover plate is completed.

[0044] Preferably, the rotating member 3 in the present application is four, and the number of the accommodating grooves 101 corresponds to the rotating member 3 one by one, and the locking member 4 corresponds to the rotating member 3 one by one, so as to realize the stable connection between the upper cover 2 and the base 1. The four locking members 4 can also be used to realize the quick unlocking between the base 1 and the upper cover 2 by synchronously pinching the two pushing parts 403 of the two locking members 4 on both sides with both hands.

[0045] It can be understood that the two oppositely arranged positioning columns 201 can realize the stable connection and relative rotation between the rotating member 3 and the base 1.

[0046] Further preferably, as shown in Figure 2 Combined with Figure 5 It should be noted that the locking member 4 in the present application can adopt a spring structure. When the spring is pressed, one end located in the accommodating groove 101 can extend and always remain in the extended state. When the spring is pressed again, the one end located in the accommodating groove 101 can be retracted. Therefore, when the rotating member 3 enters the accommodating groove 101, the locking member 4 can be converted from the second position to the first position by pressing the spring. Since the one end located in the accommodating groove 101 extends, the rotating member 3 can be pushed to be offset, the rotating member 3 is dislocated with the insertion groove 102, and the locking action between the upper cover 2 and the cover plate is completed.

[0047] The connecting convex part 301 formed by the side wall of the rotating member 3 can rotate relative to the base 1 with the connecting convex part 301 as the rotation shaft, and by making the distance from the end face of the first end 303 of the rotating member 3 to the connecting convex part 301 smaller than the distance from the end face of the second end 304 of the rotating member 3 to the connecting convex part 301, the rotation shaft can be located at one third of the rotating member 3, so that the rotating member 3 can be kept in a vertical state under the action of gravity, and further, when the rotating member 3 loses the pushing force of the locking member 4, the automatic resetting action is realized, and the quick unlocking between the base 1 and the upper cover 2 is realized.

[0048] Optionally, as shown in Figures 1-4 The locking member 4 includes an elastic member 6, the elastic member 6 is located in the accommodating groove 101, and one end of the elastic member 6 abuts against the side wall in the accommodating groove 101, and the other end abuts against the end of the locking member 4 away from the pushing part 403.

[0049] Based on the above structure, another preferred embodiment is provided, wherein the elastic member 6 is arranged in the accommodating groove 101, the end of the locking member 4 away from the pushing part 403 abuts against the elastic member 6, and the end of the elastic member 6 away from the locking member 4 abuts against the inner wall of the accommodating groove 101, so that when the locking member 4 is pushed, the spring can be compressed.

[0050] When the elastic member 6 is in a natural stretching state, the locking member 4 in the application is in the second position, and when the elastic member 6 is in a compressed state, the locking member 4 is located in the first position. Therefore, when this structure acts, the locking member 4 is first pushed from the second position to the first position, and then the rotating member 3 is inserted into the accommodating groove 101 from the insertion slot 102, and then the pushing part 403 is released, the elastic member 6 rebounds to drive the locking member 4 to return to the second position from the first position, so as to drive the rotating member 3 to produce a deviation, realize the misalignment between the rotating member 3 and the insertion slot 102, and complete the locking between the base 1 and the upper cover 2.

[0051] When unlocking is needed, the locking member 4 is pushed, so that the locking member 4 changes from the second position to the first position, at this time, the rotating member 3 loses the action force of the locking member 4, and returns to the vertical state under the action of gravity, so as to return to the in-order state with the insertion slot 102, and complete the unlocking between the upper cover 2 and the base 1.

[0052] Optionally, as shown in Figure 4 The end of the locking member 4 away from the pushing part 403 is formed with a first limiting part 401, and the end of the elastic member 6 away from the side wall of the accommodating groove 101 abuts against the first limiting part 401; the pushing part 403 is formed with a second limiting part 402, and the second limiting part 402 is located on the side of the communication groove 103 away from the accommodating groove 101.

[0053] In this embodiment, the first limiting part 401 can contact the elastic member 6 to provide a stable and sufficient contact area, and can also contact the end of the rotating member 3 that enters the receiving groove 101 to pull the rotating member 3 to deviate and achieve a locking action.

[0054] The second limiting part 402 formed can abut against the side of the connecting groove 103 away from the receiving groove 101, thereby avoiding the problem that the pushing part 403 is completely pushed into the receiving groove 101 and cannot pop out again.

[0055] It should be noted that in this embodiment, the size of the connecting groove 103 is smaller than the size of the second limiting part 402, thereby enabling mutual limiting between the two.

[0056] Optionally, such as Figures 1-4 As shown, the housing provided by this utility model also includes a limiting plate 7, which is connected to the side wall of the base 1. A through hole 702 is formed on the limiting plate 7 at the position corresponding to the receiving groove 101. One end of the pushing part 403 can pass through the through hole 702, and the second limiting part 402 abuts against the side of the limiting plate 7 facing the base 1.

[0057] In this configuration, the area of ​​the connecting groove 103 is the same as the area of ​​the receiving groove 101, forming an opening in the receiving groove 101 facing the limiting plate 7, thereby allowing the second limiting part 402 to abut against the side of the limiting plate 7 facing the base 1. Since the limiting plate 7 in this application has a through hole 702, the function of the connecting groove 103, namely, restricting the movement of the locking member 4, can be achieved through the through hole 702. Therefore, the size of the through hole 702 in this application is smaller than the size of the second limiting part 402 to achieve the limiting function of the second limiting part 402.

[0058] Optionally, such as Figure 3 As shown, in this application, the limiting plate 7 faces the base 1 and has a movable groove 701 at the position corresponding to the connecting groove 103. The movable groove 701 and the side wall of the base 1 form a limiting space, and the second limiting part 402 moves between the side wall of the base 1 and the movable groove 701.

[0059] The movable groove 701 formed by the limiting plate 7 can cooperate with the receiving groove 101 to form a larger limiting space, so that the rotating component 3 can partially enter the movable groove 701 when it is offset, thereby achieving a more stable misaligned locking state and thus achieving stable locking between the cover plate and the upper cover 2.

[0060] Preferably, the limiting plate 7 in this application is thermally fused with the base 1.

[0061] Optionally, such as Figure 4As shown, the first limiting part 401 in the application is formed with a first inclined surface 4011 on the side away from the elastic member 6, and the rotating member 3 is formed with a second inclined surface 302, and the first inclined surface 4011 and the second inclined surface 302 are in close contact when the rotating member 3 is inserted into the slot 102.

[0062] Through the first inclined surface 4011 and the second inclined surface 302, the process of inserting the rotating member 3 into the slot 102 is more smooth, and the close degree between the locking member 4 and the rotating member 3 is improved.

[0063] Preferably, the accommodating groove 101 in the application is arranged one by one with the locking member 4, and the accommodating groove 101 is distributed along the edge of the side of the base 1 towards the upper cover 2, and the rotating member 3 is arranged one by one with the locking member 4.

[0064] In addition, the application also provides a BDU comprising the above-mentioned box.

[0065] The BDU adopting the box provided by the application can realize detachable connection between the upper cover 2 and the base 1, so that when disassembly is needed, the destructive disassembly mode of the present stage can be avoided, the upper cover 2 and the base 1 can be assembled again, the assembly efficiency is improved, and the cost is reduced.

[0066] The above is only a preferred embodiment of the application, and is not used to limit the application, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A case characterized by comprising: The utility model relates to a self-locking box, comprising: a base (1) comprising an inner cavity (104), a containing groove (101), a communicating groove (103) and an insertion groove (102) are formed on the side wall along the Y direction of the inner cavity (104), the communicating groove (103) and the insertion groove (102) are communicated with the containing groove (101), and the Y direction is the width direction of the box body; an upper cover (2) covering the open end of the inner cavity (104); a self-locking assembly comprising a rotating member (3) and a locking member (4); the locking member (4) is arranged in the containing groove (101) along the Y direction, and the pushing part (403) of the locking member (4) protrudes out of the communicating groove (103); pushing or releasing the pushing part (403) can make the locking member (4) move between the first position and the second position in the containing groove (101); the rotating member (3) is rotationally connected with the upper cover (2), and part of the rotating member (3) is inserted into the insertion groove (102) along the Z direction; when the locking member (4) is in the first position, the rotating member (3) can be twisted to be out of position with the insertion groove (102), thereby locking the rotating member (3); and the Z direction is the height direction of the box body.

2. The case of claim 1, wherein, two positioning columns (201) are formed on the upper cover (2) corresponding to the position of the insertion groove (102) along the X direction, the rotating member (3) is located between the two positioning columns (201) and is rotationally connected with the positioning columns (201), and the X direction is the length direction of the box body.

3. The case of claim 2, wherein, a positioning hole (2011) is formed on the positioning column (201), a connecting convex part (301) is formed on the side wall of the rotating member (3), the connecting convex part (301) is inserted into the positioning hole (2011) and is rotationally connected with the positioning column (201); the distance from the end face of the first end (303) of the rotating member (3) to the connecting convex part (301) is less than the distance from the end face of the second end (304) of the rotating member (3) to the connecting convex part (301).

4. The case of claim 1, wherein, the locking member (4) comprises an elastic member (6), the elastic member (6) is located in the containing groove (101) along the Y direction, one end of the elastic member (6) abuts against the side wall in the containing groove (101), and the other end abuts against the end of the locking member (4) away from the pushing part (403).

5. The case of claim 4, wherein, a first limiting part (401) is formed on the end of the locking member (4) away from the pushing part (403), and the end of the elastic member (6) away from the side wall of the containing groove (101) abuts against the first limiting part (401); a second limiting part (402) is formed on the pushing part (403) along the Z direction, and the second limiting part (402) is located on the side of the communicating groove (103) away from the containing groove (101).

6. The case of claim 5, wherein, Further comprising a limiting plate (7) connected with the side wall surface of the base (1), and a through hole (702) is formed on the limiting plate (7) at a position corresponding to the accommodating groove (101), one end of the pushing part (403) can pass through the through hole (702), and the second limiting part (402) abuts against the side of the limiting plate (7) facing the base (1).

7. The case of claim 6, wherein, The limiting plate (7) is formed with a movable groove (701) on the side facing the base (1) along the Y direction and at a position corresponding to the accommodating groove (101), the movable groove (701) forms a limiting space with the side wall of the base (1), and the second limiting part (402) moves along the Y direction between the side wall of the base (1) and the movable groove (701).

8. The case of claim 6, wherein, The limiting plate (7) is hot melt connected with the base (1).

9. The case of claim 5, wherein, The first limiting part (401) is formed with a first inclined surface (4011) on the side facing away from the elastic member (6) along the Y direction, the rotating member (3) is formed with a second inclined surface (302), and the first inclined surface (4011) and the second inclined surface (302) are fitted when the rotating member (3) is inserted into the insertion groove (102).

10. A BDU, characterized by, The box body according to any one of claims 1-9.

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