Shell assembly and filter

Abstract

The utility model discloses a shell assembly and a filter, and the filter comprises a shell, a cover plate and a fastener, an accommodating groove is formed in the shell and is used for mounting the filter element; the edge of one side of the cover plate is rotationally connected to the edge of a notch of the containing groove, the cover plate rotates to cover or open the notch of the containing groove, and a limiting groove is concavely formed in the edge of the other side of the cover plate; the fastener is movably connected to the shell and can stretch into the limiting groove to lock the cover plate or stretch out of the limiting groove to unlock the cover plate. The technical scheme of the utility model provides a shell assembly fixing mode which is simple in structure, low in production cost and convenient to install and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a shell component and a filter. Background Art

[0002] The water purification filter can be connected to raw water such as municipal tap water and well water, and users can directly drink the water flowing out of the water purification filter.

[0003] The filter includes a filter element and a housing. The filter element can be used after being placed inside the housing and fixed. In existing filters, the filter element and the housing are generally fixed in a threaded connection or a snap-on connection. Such connection methods require additional disassembly and assembly tools or the mold manufacturing cost of the snap-on structure is high, and have the problems of low connection efficiency, high manufacturing cost, and complex structure. Utility Model Content

[0004] The main purpose of the utility model is to propose a shell assembly, aiming to provide a shell assembly fixing method with simple structure, low production cost and convenient installation and replacement.

[0005] In order to achieve the above-mentioned purpose, the housing assembly proposed by the utility model includes:

[0006] A housing, wherein the housing is provided with a receiving groove, and the receiving groove is used for installing a filter element;

[0007] A cover plate, one side edge of which is rotatably connected to the notch edge of the receiving slot, the cover plate is rotated to cover or open the notch of the receiving slot, and the other side edge of the cover plate is concavely provided with a limiting groove; and

[0008] A fastener is connected to the shell, and the fastener can extend into the limiting groove to lock the cover or extend out of the limiting groove to unlock the cover.

[0009] Optionally, the fastener is a knob, and the knob is rotatably connected to the shell.

[0010] Optionally, the rotation center of the fastener is located at the center point of the knob.

[0011] Optionally, a handle is connected to a surface of a side of the fastener facing away from the shell, and the handle is extended along an extension direction of the fastener.

[0012] Optionally, the end surface of the fastener is an arc-shaped surface, the groove side wall of the limiting groove is an arc-shaped surface, and the curvature of the end surface of the fastener is consistent with the curvature of the groove side wall of the limiting groove.

[0013] Optionally, there are two cover plates, which are rotatably connected to the opposite side edges of the slot of the accommodating slot respectively, and the two cover plates are relatively rotated to cover or open the slot of the accommodating slot. The two cover plates are provided with avoidance grooves at the corners of the opposite side edges, and the two avoidance grooves are combined to form the limit groove, and the fastener is arranged at the joint of the two cover plates.

[0014] Optionally, the shell assembly also includes two connecting plates, which are connected to the shell along the edge of the slot perpendicular to the accommodating slot and are respectively located on opposite sides of the slot of the accommodating slot. The opposite sides of the cover plate are respectively rotatably connected to the two connecting plates. The connecting plate is provided with a connecting port at a position corresponding to the opening of the limiting slot. The fastener is arranged on the side of the connecting port away from the cover plate, and the fastener rotates through the connecting port to extend into or out of the limiting slot.

[0015] Optionally, the housing assembly further comprises a connecting shaft, connecting holes are provided at positions corresponding to the two connecting plates, two ends of the connecting shaft are rotatably connected to the two connecting holes respectively, and one side edge of the cover plate is connected to the connecting shaft;

[0016] And / or, the cover plate is provided with avoidance grooves at the corners on both sides of the edge of one side opposite to each other.

[0017] Optionally, a pressure block is protruding from one side surface of the cover plate facing the receiving groove, and the extension direction of the pressure block is the same as the extension direction of the cover plate. When the cover plate covers the receiving groove, the pressure block presses against the end surface of the filter element.

[0018] The utility model also provides a filter, comprising the housing assembly and a filter element as described above, wherein the filter element is arranged in the containing groove.

[0019] The housing assembly of the utility model technical solution includes a housing, a cover plate and a fastener. The housing is provided with a receiving groove. One side edge of the cover plate is rotatably connected to the edge of the notch of the housing located at the receiving groove. The cover plate is rotated to cover or open the notch of the receiving groove. The other side edge of the cover plate is concavely provided with a limiting groove. The fastener is connected to the housing. The fastener can extend into the limiting groove to lock the cover plate or extend out of the limiting groove to unlock the cover plate. The receiving groove is used to install the filter element. After the fastener is moved to extend out of the limiting groove, the cover plate can be opened. After the cover plate is opened, the filter element can be placed in the receiving groove. After the filter element is placed in the receiving groove, the cover plate can be covered. After the cover plate is covered, the fastener can be moved to extend into the limiting groove to lock the cover plate, thereby avoiding the opening of the cover plate and realizing the fixing of the cover plate and the filter element. The fixing method of the filter element and the housing assembly has the characteristics of simple structure, low production cost, and convenient installation and replacement, which improves the efficiency of the installation and fixing of the filter element, maintains the stability of the fixing, and is convenient to take and put. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the filter of the utility model;

[0022] Figure 2 This is a structural schematic diagram of the cover plate in the housing assembly of the utility model in a closed state;

[0023] Figure 3 This is a schematic diagram of the structure of the housing assembly of the utility model in which the cover plate is in an open state;

[0024] Figure 4 It is a structural schematic diagram of another perspective of the cover plate in the housing assembly of the utility model in the closed state;

[0025] Figure 5 This is a structural schematic diagram of the housing assembly of the utility model from another perspective when the cover plate is in an open state.

[0026] Description of Figure Numbers:

[0027] Label name Label name 1 Housing components 11 case 111 Receiving slot 13 Cover 131 Limit slot 133 Briquetting 15 fastener 151 handle 17 Connecting plate 171 Connection port 173 Connection hole 19 Connecting shaft 100 Filters 2 Filter Elements

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0032] The utility model provides a housing assembly 1 .

[0033] In the embodiment of the present utility model, Figures 1 to 5 As shown, the shell assembly 1 includes a shell 11, a cover plate 13 and a fastener 15; the shell 11 is provided with a receiving groove 111, and the receiving groove 111 is used to install the filter element 2; one side edge of the cover plate 13 is rotatably connected to the notch edge of the receiving groove 111, and the cover plate 13 is rotated to cover or open the notch of the receiving groove 111, and the other side edge of the cover plate 13 is recessed with a limiting groove 131; the fastener 15 is connected to the shell 11, and the fastener 15 can extend into the limiting groove 131 to lock the cover plate 13 or extend out of the limiting groove 131 to unlock the cover plate 13.

[0034] The shell 11 is provided with a receiving groove 111, and the receiving groove 111 is used to install the filter element 2. It can be understood that the cross-sectional shape of the receiving groove 111 is adapted to the cross-sectional shape of the filter element 2. When the filter element 2 is installed in the receiving groove 111, the outer surface of the filter element 2 is in contact with the groove wall of the receiving groove 111, thereby avoiding the shaking and movement of the filter element 2 inside the shell 11; and the groove depth of the receiving groove 111 is adapted to the height of the filter element 2. When the filter element 2 is installed in the receiving groove 111, the end plane of the filter element 2 is lower than the notch position of the receiving groove 111, thereby ensuring that the filter element 2 is completely placed inside the receiving groove 111.

[0035] One side edge of the cover plate 13 is rotatably connected to the notch edge of the receiving groove 111, and the cover plate 13 is rotated to cover or open the notch of the receiving groove 111. When the cover plate 13 covers the notch of the receiving groove 111, it can have a sealing effect on the notch of the receiving groove 111 to prevent the filter element 2 inside the receiving groove 111 from falling out. When the cover plate 13 is opened, the sealing effect of the cover plate 13 on the notch of the receiving groove 111 is released, and the filter element 2 inside the receiving groove 111 can be freely taken in and out.

[0036] The other side edge of the cover plate 13 is concavely provided with a limiting groove 131. The other side edge of the cover plate 13 can be located on the adjacent side of the edge of the cover plate 13 and the housing 11, or can be on the opposite side, which is not limited here. The fastener 15 is connected to the housing 11, and the fastener 15 moves to extend into or out of the limiting groove 131. The fastener 15 can move in a rotating, flipping, or translating manner, which is not limited here. The fastener 15 can be a knob, a buckle, an elastic opening, etc., which is not limited here.

[0037] Furthermore, the number of the cover plates 13 may be one or more. When the number of the cover plates 13 is one, the cover plate 13 may cover the entire notch of the receiving groove 111 to seal the notch of the receiving groove 111; when the number of the cover plates 13 is multiple, the multiple cover plates 13 may cover the entire notch of the receiving groove 111 by combining and sealing the notch of the receiving groove 111.

[0038] Furthermore, in the present embodiment, the steps of locking and unlocking the housing assembly 1 and the filter element 2 are as follows: after the fastener 15 is moved to extend out of the limiting groove 131, the cover 13 can be opened, and after the cover 13 is opened, the filter element 2 can be placed in the receiving groove 111; after the filter element 2 is placed in the receiving groove 111, the cover 13 can be closed, and after the cover 13 is closed, the fastener 15 can be moved to extend into the limiting groove 131, and the cover 13 is locked, thereby avoiding the cover 13 from being opened, and achieving the fixation of the cover 13 and the filter element 2.

[0039] The shell assembly 1 of the technical solution of the utility model includes a shell 11, a cover plate 13 and a fastener 15. The shell 11 is provided with a receiving groove 111. One side edge of the cover plate 13 is rotatably connected to the edge of a side notch of the shell 11 located at the receiving groove 111. The cover plate 13 is rotated to cover or open the notch of the receiving groove 111. The other side edge of the cover plate 13 is recessed with a limiting groove 131. The fastener 15 is connected to the shell 11. The fastener 15 extends into the limiting groove 131 to lock the cover plate 13 or extends out of the limiting groove 131 to unlock the cover plate 13. The receiving groove 111 is used to install the filter element 2. After the fastener 15 is moved to extend out of the limiting groove 131, the cover plate 13 can be opened. After the cover plate 13 is opened, the filter element 2 can be placed in the receiving groove 111. After the filter element 2 is placed in the receiving groove 111, the cover plate 13 can be closed. After the cover plate 13 is closed, the fastener 15 can be moved to extend into the limiting groove 131 to lock the cover plate 13, thereby avoiding the opening of the cover plate 13 and achieving the fixation of the cover plate 13 and the filter element 2. The fixing method of the filter element 2 and the housing assembly 1 has the characteristics of simple structure, low production cost, and convenient installation and replacement, which improves the installation and fixing efficiency of the filter element 2, maintains the stability of the fixation, and is easy to take and put.

[0040] In one embodiment of the present invention, Figures 2 to 5As shown, the fastener 15 is a knob, which is rotatably connected to the housing 11 .

[0041] In this embodiment, the fastener 15 is a knob, which is rotatably connected to the shell 11 and is located on one side of the edge of the cover 13 where a limiting groove 131 is provided. The position or protruding direction of the knob can be changed by turning the knob. Then, when the cover 13 is closed, the knob can be turned so that part of the position or the protruding part can be extended into or out of the limiting groove 131. The knob is extended into the limiting groove 131, which can lock the cover 13, thereby avoiding the cover 13 from being opened, thereby achieving the fixation of the cover 13 and the filter element 2.

[0042] In one embodiment of the present invention, Figures 2 to 5 As shown, the rotation center of the fastener 15 is located at the center point of the knob.

[0043] In this embodiment, the rotation center of the fastener 15 is located at the center point of the knob, and the fastener 15 is a strip-shaped extension structure. When the rotation center is located at the center point, the structures of the knob on both sides of the rotation center are symmetrically arranged, so that the knob can be rotated in different directions, and the protruding part of the knob can be extended into the limit groove 131, which improves the practicability of the knob operation and the convenience of combining the knob with the limit groove 131.

[0044] Furthermore, in another embodiment, the rotation center of the fastener 15 can also be set close to one side edge of the knob. With this setting, the knob can rotate along one side thereof and extend into the limiting groove 131 through the other side to achieve a locking effect with the limiting groove 131.

[0045] In one embodiment of the present invention, Figures 2 to 5 As shown, a handle 151 is connected to a surface of the fastener 15 facing away from the housing 11 , and the handle 151 is extended along the extension direction of the fastener 15 .

[0046] In this embodiment, a handle 151 is connected to a surface of the fastener 15 on one side facing away from the housing 11, and the handle 151 is extended along the extension direction of the fastener 15. With the arrangement of the handle 151, when the user needs to turn the knob, the user can hold the protruding handle 151 to turn the corresponding knob, which is convenient for the user to hold the knob, and further convenient for the user to exert force and turn the knob, thereby improving the practicality of the knob operation.

[0047] In an embodiment of the present invention, the end surface of the fastener 15 is an arc-shaped surface, the groove sidewall of the limiting groove 131 is an arc-shaped surface, and the curvature of the end surface of the fastener 15 is consistent with the curvature of the groove sidewall of the limiting groove 131.

[0048] In this embodiment, the end surface of the fastener 15 is an arc-shaped surface, and the side wall of the limiting groove 131 is an arc-shaped surface. Both are arc-shaped surfaces, and the curvature of the two is consistent. In this way, when the knob is rotated to extend into or extend out of the limiting groove 131, it can avoid the edge of the knob from touching or getting stuck with the groove wall of the limiting groove 131, thereby improving the smoothness of the knob extending into or extending out of the limiting groove 131. In addition, when the knob is extended into the limiting groove 131, the side surface of the knob can abut against the groove wall of the limiting groove 131, thereby increasing the pressing area of ​​the knob against the limiting groove 131, improving the close fit between the knob and the limiting groove 131, and thus improving the effectiveness and stability of the knob against the limiting groove 131.

[0049] In one embodiment of the present invention, Figures 2 to 5 As shown, there are two cover plates 13, which are rotatably connected to the opposite side edges of the slot of the accommodating slot 111 respectively. The two cover plates 13 rotate relative to each other to cover or open the slot of the accommodating slot 111. The two cover plates 13 are provided with avoidance grooves at the corners of the edges of the opposite sides. The two avoidance grooves are combined to form a limiting groove 131, and the fastener 15 is arranged at the joint of the two cover plates 13.

[0050] In this embodiment, there are two cover plates 13, and the two cover plates 13 are respectively rotatably connected to the opposite side edges of the slot of the receiving slot 111, and the two cover plates 13 are relatively rotated to cover or open the slot of the receiving slot 111. Compared with only one cover plate 13, the arrangement of the two cover plates 13 can reduce the protruding height of the cover plate 13 in the axial direction of the slot of the receiving slot 111 when it is opened, avoid the contact of the cover plate 13 with other objects when it is opened, and protect the structure of the cover plate 13. It can be understood that the corners of the edges of one side where the two cover plates 13 are connected are provided with avoidance grooves, and the two butted avoidance grooves are combined to form a limiting groove 131. The fastener 15 is moved to extend into the limiting groove 131, and the two avoidance grooves and the butt gap between the two avoidance grooves can be covered at the same time, thereby achieving the blocking of the limiting groove 131, locking the cover plate 13, avoiding the opening of the cover plate 13, and achieving the fixation of the cover plate 13 and the filter element 2.

[0051] Furthermore, two complementary step surfaces can be provided at the edges of the joints of the two cover plates 13. The two step surfaces can fit together so that the two side edges of the two cover plates 13 are tightly attached to each other, thereby achieving the effect of pressing and fixing one cover plate 13 to the other cover plate 13, and covering the gap between the two cover plates 13.

[0052] In one embodiment of the present invention, Figures 2 to 5As shown, the shell assembly 1 also includes two connecting plates 17, which are connected to the shell 11 along the edge of the slot of the vertical accommodating groove 111 and are respectively located on the opposite sides of the slot of the accommodating groove 111. The opposite sides of the cover plate 13 are respectively rotatably connected to the two connecting plates 17. The connecting plate 17 is provided with a connecting port 171 at a position corresponding to the opening of the limiting groove 131. The fastener 15 is arranged on the side of the connecting port 171 away from the cover plate 13. The fastener 15 rotates through the connecting port 171 to extend into or out of the limiting groove 131.

[0053] In this embodiment, the housing assembly 1 further includes two connecting plates 17, which are connected to the housing 11 along the notch edge of the vertical receiving groove 111 and are respectively located on opposite sides of the notch of the receiving groove 111, and opposite sides of the cover plate 13 are respectively rotatably connected to the two connecting plates 17. The rotational connection between the cover plate 13 and the two connecting plates 17 can be a shaft hole connection, a hinge connection, or a gear slide connection, which is not limited here. The opposite sides of the cover plate 13 are respectively rotatably connected to the two connecting plates 17, and the connecting plate 17 is provided with a connecting port 171 at a position corresponding to the opening of the limiting groove 131, and the fastener 15 is provided on the side of the connecting port 171 away from the cover plate 13, and the fastener 15 rotates through the connecting port 171 to extend into or out of the limiting groove 131. With the setting of the connecting plate 17, the cover plate 13 does not need to be directly connected to the shell body 11. The cover plate 13 can be connected to the shell body 11 by means of the connecting plate 17, which facilitates the installation and replacement of the cover plate 13 and avoids the influence of the installation of the cover plate 13 on the structure of the shell 11. In addition, the connecting plate 17 is arranged perpendicular to the notch edge of the accommodating groove 111, which increases the distance between the cover plate 13 and the notch of the accommodating groove 111, maintains a position parallel to the notch when the cover plate 13 is closed, and improves the tightness of the cover plate 13 covering the notch of the accommodating groove 111.

[0054] Furthermore, the connection plate 17 is provided with a connection port 171 at a position corresponding to the opening of the limiting groove 131, and the fastener 15 is provided at a side of the connection port 171 away from the cover plate 13. The fastener 15 rotates through the connection port 171 to extend into or extend out of the limiting groove 131, and the fastener 15 can extend into or extend out of the limiting groove 131 through the connection port 171 to achieve connection with the limiting groove 131 of the cover plate 13. It can be understood that the width of the connection port 171 is greater than or equal to the width of the fastener 15, and the heights of the two can be consistent, thereby ensuring that the fastener 15 can stably pass through the connection port 171 and extend into the limiting groove 131, thereby achieving a locking effect on the cover plate 13.

[0055] In one embodiment of the present invention, Figures 2 to 5 As shown, the housing assembly 1 further includes a connecting shaft 19, and connecting holes 173 are provided at corresponding positions of the two connecting plates 17, and both ends of the connecting shaft 19 are rotatably connected to the two connecting holes 173, and one side edge of the cover plate 13 is connected to the connecting shaft 19;

[0056] And / or, avoidance grooves are provided at the corners on both sides of the edge of the cover plate 13 that is located opposite to each other.

[0057] In this embodiment, the housing assembly 1 further includes a connecting shaft 19, and connecting holes 173 are provided at positions corresponding to the two connecting plates 17. The two ends of the connecting shaft 19 are rotatably connected to the two connecting holes 173, and one side edge of the cover plate 13 is connected to the connecting shaft 19. The cover plate 13 is connected to the two connecting plates 17 through the connecting shaft 19, so that the rotation angle of the cover plate 13 and the connection stability with the two connecting plates 17 can be ensured, and then the docking position of the two cover plates 13 and the docking position with the fastener 15 can be ensured, and the effect that the fastener 15 can stably extend into or extend out of the limiting groove 131 can be ensured.

[0058] Furthermore, the cover plate 13 is provided with avoidance grooves at both corners of the opposite side edge. In this arrangement, since the avoidance grooves are provided at both corners of the cover plate 13, the cover plate 13 is symmetrically arranged on both sides of the midline position, and each cover plate 13 has the same shape. By reversing, the use of two cover plates 13 and the docking of two avoidance grooves can be achieved. A unified cover plate 13 can be obtained by using a production mold of the cover plate 13, and the installation and use of the double-door cover plate 13 can also be achieved.

[0059] In one embodiment of the present invention, Figures 2 to 5 As shown, a pressing block 133 is protruded from one side surface of the cover plate 13 facing the receiving groove 111 , and the extension direction of the pressing block 133 is the same as the extension direction of the cover plate 13 . When the cover plate 13 covers the receiving groove 111 , the pressing block 133 presses against the end surface of the filter element 2 .

[0060] In this embodiment, a pressing block 133 is convexly provided on one side surface of the cover plate 13 facing the receiving groove 111, and the extension direction of the pressing block 133 is the same as the extension direction of the cover plate 13. The arrangement of the pressing block 133 can have a pressing effect on the end surface of the filter element 2 when the cover plate 13 is covered on the receiving groove 111, thereby stabilizing the position of the filter element 2 in the receiving groove 111. Furthermore, in one embodiment, the pressing block 133 is arranged on one side of the cover plate 13 close to the housing 11, and then when the cover plate 13 is covered on the receiving groove 111, the pressing block 133 can press against the edge of the filter element 2, thereby improving the pressing and stabilizing effect of the pressing block 133 on the filter element 2.

[0061] The utility model also provides a filter 100, which includes a filter element 2 and a housing assembly 1, wherein the filter element 2 is disposed in a receiving groove 111. The specific structure of the housing assembly 1 refers to the above embodiment, and since the filter 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0062] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A housing assembly, applied to a filter, characterized in that: The housing assembly comprises: A housing (11), wherein the housing (11) is provided with a receiving groove (111), and the receiving groove (111) is used for installing a filter element (2); a cover plate (13), one side edge of the cover plate (13) being rotatably connected to the notch edge of the receiving groove (111), the cover plate (13) being rotated to cover or open the notch of the receiving groove (111), and the other side edge of the cover plate (13) being concavely provided with a limiting groove (131); and A fastener (15), wherein the fastener (15) is movably connected to the housing (11), and the fastener (15) can extend into the limiting groove (131) to lock the cover plate (13) or extend out of the limiting groove (131) to unlock the cover plate (13).

2. The housing assembly according to claim 1, wherein: The fastener (15) is a knob, and the knob is rotatably connected to the housing (11).

3. The housing assembly according to claim 2, wherein: The rotation center of the fastener (15) is located at the center point of the knob.

4. The housing assembly according to claim 2, wherein: A handle (151) is connected to a surface of one side of the fastener (15) facing away from the housing (11), and the handle (151) is extended along the extension direction of the fastener (15).

5. The housing assembly according to claim 2, wherein: The end surface of the fastener (15) is an arc-shaped surface, the groove side wall of the limiting groove (131) is an arc-shaped surface, and the curvature of the end surface of the fastener (15) is consistent with the curvature of the groove side wall of the limiting groove (131).

6. The housing assembly according to any one of claims 1 to 5, characterized in that: The number of the cover plates (13) is two, and the two cover plates (13) are respectively rotatably connected to the opposite side edges of the slot of the receiving slot (111). The two cover plates (13) are relatively rotated to cover or open the slot of the receiving slot (111). The two cover plates (13) are both provided with avoidance grooves at the corners of the opposite side edges, and the two avoidance grooves are enclosed to form the limiting groove (131). The fastener (15) is arranged at the joint of the two cover plates (13).

7. The housing assembly according to claim 6, wherein: The shell assembly also includes two connecting plates (17), which are connected to the shell (11) along the edge of the slot perpendicular to the accommodating slot (111) and are respectively located on opposite sides of the slot of the accommodating slot (111). The opposite sides of the cover plate (13) are respectively rotatably connected to the two connecting plates (17). The connecting plate (17) is provided with a connecting port (171) at a position corresponding to the opening of the limiting slot (131). The fastener (15) is arranged on a side of the connecting port (171) away from the cover plate (13). The fastener (15) is rotatably passed through the connecting port (171) to extend into or out of the limiting slot (131).

8. The housing assembly according to claim 7, wherein: The housing assembly further comprises a connecting shaft (19), connecting holes (173) are provided at positions corresponding to the two connecting plates (17), two ends of the connecting shaft (19) are rotatably connected to the two connecting holes (173), and one side edge of the cover plate (13) is connected to the connecting shaft (19); And / or, the cover plate (13) is provided with avoidance grooves at the corners on both sides of the edge of one side that is opposite to each other.

9. The housing assembly according to any one of claims 1 to 5, characterized in that: A pressing block (133) is protrudingly provided on a side surface of the cover plate (13) facing the receiving groove (111); the extension direction of the pressing block (133) is the same as the extension direction of the cover plate (13); when the cover plate (13) covers the receiving groove (111), the pressing block (133) presses against the end surface of the filter element (2).

10. A filter, characterized in that: It comprises a housing assembly and a filter element (2) as claimed in any one of claims 1 to 9, wherein the filter element (2) is arranged in the receiving groove (111).

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