Detachable unit and automobile seat

Abstract

The invention discloses a detachable unit and an automobile seat, and the detachable unit comprises a detachable component which is inserted into and connected with a containing cavity of equipment and can be detached from the containing cavity; the sealing cover is movably arranged in the containing cavity and abuts against the detachable component when the detachable component is inserted into the containing cavity of the equipment, the sealing cover can move to block the opening part of the containing cavity when the detachable component is detached from the containing cavity, the detachable component is provided with an abutting end, a locking part and an unlocking part, the abutting end is used for abutting against the sealing cover, and the locking part is used for locking the sealing cover. The locking part is used for locking the detachable component in the containing cavity, the unlocking part is used for unlocking the detachable component in the containing cavity, and in the process that the detachable component is inserted into the containing cavity in the inserting direction, the abutting end pushes the sealing cover so that the sealing cover can move towards the interior of the containing cavity in the inserting direction. According to the detachable component, the overall attractiveness and safety can still be kept even if the detachable component is detached.

Description

[0001] This application is a divisional application of the application whose applicant is "Mingmen Switzerland AG", whose application date is December 4, 2020, whose application number is 202011411737.4, and whose invention name is "Removable unit and car seat including the detachable unit". Technical Field

[0002] The present application relates to a detachable unit and a vehicle seat comprising the detachable unit. Background Art

[0003] Child transport devices, such as strollers and child safety seats, are increasingly being equipped with canopy mechanisms to achieve the purpose of sunshade, wind shelter, privacy protection, etc. However, the canopy mechanism needs to constantly adjust its shielding range during use to facilitate guardians to observe the user's status, or needs to be adjusted to the most comfortable or safest angle for the user.

[0004] For example, Chinese patent document CN206394687U discloses a baby stroller seat canopy folding device, which uses a canopy movable mechanism to gently push and pull the operating rod, so that the operating rod moves up and down along the mounting member, and can link the swing rod to form a forward or backward pivot swing, so that the canopy can be expanded or folded. Therefore, the user can directly adjust the expansion or folding action of the canopy through the canopy movable mechanism at the rear side of the seat without running to the front of the seat or bending over to adjust.

[0005] Although the canopy folding device disclosed in the prior art can unfold or fold the canopy, it is not possible to disassemble the canopy, which is sometimes important, especially when the canopy mechanism is not used for a long time or needs to be cleaned.

[0006] For another example, Chinese patent document CN103661553B discloses a foldable canopy for a child carrier, which can be in a closed position, in which a portion or all of the rear portion of the canopy can be fixed in a first groove, and a portion or all of the front portion of the canopy can be fixed in a second groove. To open the canopy, the user pulls or otherwise moves the canopy cover away from the upper portion of the housing.

[0007] In addition, the canopy can be removed from the child carrier, for example by applying sufficient force to remove the plastic tube from one or more joints and / or tube end catches of the outer shell and / or canopy cover or from the canopy cover and / or outer shell.

[0008] However, in the above-mentioned prior art, when the plastic tube is removed from the joint or the tube end capture block, the accommodating cavity in which the plastic tube was originally inserted will be exposed, affecting the overall aesthetics and easily injuring the body of the user or passenger, causing a safety hazard. Summary of the invention

[0009] In view of this, the purpose of the present application is to provide a detachable unit and a car seat including the detachable unit, by which the ceiling mechanism can be attached to the car seat, and the detachable unit together with the ceiling mechanism can also be removed from the car seat. After removal, the cover of the detachable unit will block the accommodating cavity where the detachable component was originally inserted, thereby improving the overall aesthetics and safety.

[0010] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a detachable unit is provided, including: a detachable component, which is inserted and connected in a accommodating cavity of a device and can be removed from the accommodating cavity; a cover, which is movably arranged in the accommodating cavity and abuts against the detachable component when the detachable component is inserted in the accommodating cavity of the device, and can be moved to block the opening of the accommodating cavity when the detachable component is removed from the accommodating cavity, wherein the detachable component is provided with an abutting top end, a locking part, and an unlocking part, the abutting top end is used to abut against the cover, the locking part is used to lock the detachable component in the accommodating cavity, and the unlocking part is used to unlock the lock of the detachable component in the accommodating cavity, wherein, in the process of inserting the detachable component into the accommodating cavity in the insertion direction, the abutting top end pushes the cover so that the cover moves toward the accommodating cavity along the insertion direction.

[0011] According to an embodiment, when the unlocking portion is forced to move in a direction substantially perpendicular to the insertion direction of the detachable component, the unlocking portion drives the locking portion to move in the direction substantially perpendicular to the insertion direction of the detachable component to be unlocked.

[0012] According to one embodiment, the detachable component further comprises a connecting end and a middle section arranged between the abutting top end and the connecting end, the abutting top end abuts against the cover, and the connecting end is used to connect to an accessory of the device.

[0013] According to one embodiment, the detachable component is further provided with a reset portion, which is used to reset the locking portion, and the locking portion, the unlocking portion and the reset portion are arranged in the middle section, and the unlocking portion is exposed outside the accommodating cavity.

[0014] According to one embodiment, the locking portion is in the form of a hook, which extends in a direction substantially perpendicular to the insertion direction of the detachable component so as to be locked in a corresponding snap-fit ​​structure in the accommodating cavity when the detachable component is inserted in the accommodating cavity.

[0015] According to the second aspect of the present application, a detachable unit is also provided, comprising: a detachable component, which is inserted and connected in a accommodating cavity of a device and can be removed from the accommodating cavity; a cover, which is movably arranged in the accommodating cavity and abuts against the detachable component when the detachable component is inserted in the accommodating cavity of the device, and can be moved to block the opening of the accommodating cavity when the detachable component is removed from the accommodating cavity, wherein the detachable component is provided with an abutting top end, a locking part, and an unlocking part, the abutting top end is used to abut against the cover, the locking part is used to lock the detachable component in the accommodating cavity, and the unlocking part is used to unlock the lock of the detachable component in the accommodating cavity, wherein the accommodating cavity has a non-circular contour, and the abutting top end of the detachable component and the cover have an outer contour corresponding to the accommodating cavity.

[0016] According to an embodiment, the detachable unit further includes an elastic member, and the elastic member is disposed between the cover and a bottom portion of the accommodating cavity opposite to the opening, or is disposed at the bottom portion of the cover.

[0017] According to one embodiment, the cover is in the form of a cover body, including a cover body and a side wall extending vertically from the periphery of the cover body, and a locking piece is provided on the side wall.

[0018] According to one embodiment, the abutment tip of the detachable member and the cover have a racetrack-type outer contour.

[0019] According to another aspect of the present application, a detachable unit is provided, comprising: a detachable member, which is inserted and connected in a receiving cavity of a device and can be removed from the receiving cavity; a cover, which is movably arranged in the receiving cavity and abuts against the detachable member when the detachable member is inserted in the receiving cavity of the device, and can be moved to block the opening of the receiving cavity when the detachable member is removed from the receiving cavity, wherein the detachable member is provided with an abutting top end, a locking part, and an unlocking part, the abutting top end is used to abut against the cover, and the locking part is used to lock the detachable member. The component is locked in the accommodating cavity, and the unlocking portion is used to unlock the lock of the detachable component in the accommodating cavity, wherein a snap-fitting piece is provided on the cover, and a snap-fitting structure is provided in the accommodating cavity. When the detachable component is inserted into the accommodating cavity, the locking portion can be engaged with the snap-fitting structure to keep the detachable component in the accommodating cavity. When the detachable component is removed from the accommodating cavity, the cover moves toward the opening of the accommodating cavity and is maintained in a position of blocking the opening of the accommodating cavity through the cooperation of the snap-fitting piece and the snap-fitting mechanism.

[0020] According to one embodiment, the cover is in the form of a cover body, including a cover body and a side wall extending vertically from the periphery of the cover body, and a plurality of the engaging members are symmetrically arranged on the side wall.

[0021] According to an embodiment, the engaging structure is formed as a recessed portion in the accommodating cavity, the locking portion is formed as a hook, and the engaging member is formed as a protruding portion on the side wall of the cover body.

[0022] According to another aspect of the present application, a car seat is provided, comprising: a backrest portion, the backrest portion being formed with the accommodating cavity; and the detachable unit as described above, the cover of the detachable unit being always disposed in the accommodating cavity.

[0023] To this end, according to one scheme of the present application, a detachable unit is provided, comprising: a detachable component, which is inserted and connected in a accommodating cavity of a device and can be removed from the accommodating cavity; a cover, which is movably arranged in the accommodating cavity and abuts against the detachable component when the detachable component is inserted in the accommodating cavity of the device, and can be moved to block the opening of the accommodating cavity when the detachable component is removed from the accommodating cavity.

[0024] Preferably, the detachable component comprises an abutting top end, a connecting end and a middle section arranged between the abutting top end and the connecting end, the abutting top end abuts against the cover, and the connecting end is used to connect to an accessory of the device.

[0025] Preferably, the middle section is provided with a locking part, an unlocking part and a resetting part, the locking part is used to lock the detachable component in the accommodating cavity of the device, the unlocking part is exposed outside the accommodating cavity to unlock the detachable component in the accommodating cavity, and the resetting part is used to reset the locking part.

[0026] Preferably, the locking portion is in the form of a hook, which extends in a direction substantially perpendicular to the insertion direction of the detachable component, so as to be locked in a correspondingly arranged snap-fit ​​structure in the accommodating cavity when the detachable component is inserted in the accommodating cavity; the unlocking portion and the locking portion form an integral structure, and the locking portion can be moved in a direction substantially perpendicular to the insertion direction of the detachable component by moving the unlocking portion.

[0027] Preferably, the unlocking portion is in the form of a button with a corrugated surface, and the resetting portion is in the form of a resetting spring that abuts against the unlocking portion.

[0028] Preferably, the outer contour of the cover is formed to match the contour of the receiving cavity of the device.

[0029] Preferably, the detachable unit further includes an elastic member, and the elastic member is arranged between the cover and the bottom of the accommodating cavity opposite to the opening, or is arranged at the bottom of the cover.

[0030] Preferably, the sealing cover is in the form of a cover body, including a cover body and a side wall extending vertically from the periphery of the cover body, and a locking piece is provided on the side wall.

[0031] Preferably, the elastic member is disposed in a space enclosed by side walls of the cover, and abuts between the cover body and the bottom of the accommodating cavity.

[0032] According to another aspect of the present application, a car seat with a detachable unit is provided, comprising a seat portion, a backrest portion, and a headrest portion, wherein the backrest portion is formed with a receiving cavity, the detachable unit is inserted in the receiving cavity, and the detachable unit is connected to a canopy mechanism.

[0033] Preferably, the canopy mechanism is connected to two of the detachable units, and two accommodating cavities are formed on the back side of the backrest portion, and the two detachable units are respectively inserted into the two accommodating cavities.

[0034] According to the detachable unit and the car seat including the detachable unit of the present application, after the detachable component of the detachable unit is detached, the cover of the detachable unit can block the accommodating cavity in which the detachable component is inserted, so that the overall aesthetics and safety can still be maintained even after the detachable component is detached. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Those skilled in the art will appreciate that the drawings are primarily for illustrative purposes and are not intended to limit the scope of the inventive subject matter described herein. The drawings are not necessarily drawn to scale; in some cases, various aspects of the inventive subject matter disclosed herein may be exaggerated or enlarged in the drawings to facilitate understanding of different features. In the drawings, the same reference numerals generally refer to the same features (e.g., functionally similar and / or structurally similar elements).

[0036] In the attached figure:

[0037] Figure 1 is a schematic diagram of a car seat according to the present application, the car seat shown in this figure not being connected to a canopy mechanism;

[0038] Figure 2 is a schematic diagram of a car seat according to the present application, wherein the car seat shown in the figure is plug-connected with a detachable unit;

[0039] Figure 3 is a schematic diagram of a detachable unit according to the present application, the detachable unit shown in the figure being connected to a canopy mechanism;

[0040] Figure 4 is a schematic diagram of a detachable component of a detachable unit according to the present application;

[0041] Figure 5 is a schematic diagram of a cover of a detachable unit according to the present application; and

[0042] Figure 6 is a schematic diagram of a detachable unit according to the present application, which shows the matching relationship between the detachable component and the cover.

[0043] List of reference numerals:

[0044] 10: Detachable unit

[0045] 12 Removable components

[0046] 121 abutting end 122 connecting end 123 middle section

[0047] 1231 locking part 1232 unlocking part 1233 resetting part

[0048] 14 Capping

[0049] 141 cover body 142 side wall 143 engaging member

[0050] 16 Elastic member

[0051] 20: Seat

[0052] 30: Backrest

[0053] 32 Accommodation chamber

[0054] 40: Headrest

[0055] 50: Roof mechanism DETAILED DESCRIPTION

[0056] The accompanying drawings and example embodiments described below are not meant to limit the scope of the present embodiment to a single embodiment. Its embodiments can be realized by making some or all of the described or illustrated elements interchangeable. In addition, in the case where some elements of the disclosed exemplary embodiments can be implemented partially or entirely using known components, in some cases, only those parts of such known components necessary for understanding the present embodiment are described, and detailed descriptions of other parts of these known components are omitted to avoid blurring the present embodiment.

[0057] The detachable unit 10 according to the present application can be applied to a variety of occasions, including but not limited to a child carrier, a child dining chair, a wheelchair, a reclining chair, etc. In addition, in addition to being attached to the canopy mechanism 50, the detachable unit 10 can also be attached to various other facilities. For the purpose of simplicity, the following description is based on the example of the detachable unit being applied to a car seat and being attached to the canopy mechanism 50.

[0058] like Figure 1 As shown in FIG. 1 , the figure is a schematic diagram of a car seat according to the present application, the car seat comprises a seat portion 20 and a backrest portion 30, the seat portion 20 and the backrest portion 30 are approximately 90 degrees apart from each other, for example, to enclose a space for a user to sit in, of course, the seat portion 20 and the backrest portion 30 may also be at other angles apart from each other. In order to improve the comfort of sitting, a headrest portion 40 is further provided at the upper end of the backrest portion 30 for the user's head to rest on.

[0059] In addition, in order to shade, shelter from rain, block wind, or for privacy and safety, there is now a growing trend to add a canopy mechanism 50 to the car seat. Figure 2 , which is a schematic diagram of a car seat according to the present application, and the car seat shown in the figure is connected with a detachable unit 10. Specifically, a receiving cavity 32 is provided on the back of the backrest portion 30, and the receiving cavity 32 can be in the form of a blind hole, that is, it has an opening and a bottom opposite to the opening. Preferably, two receiving cavities 32 are provided symmetrically with respect to the central longitudinal axis of the backrest portion 30, and two detachable units 10 are respectively inserted in the two receiving cavities 32, and the two detachable units 10 are attached to the canopy mechanism 50 together. For the convenience of explanation, the canopy mechanism 50 only shows the main frame structure, and the canopy cover is not shown.

[0060] The detachable unit 10 includes two main parts, namely, a detachable member 12 and a cover 14. The cover 14 is disposed in a receiving cavity 32 disposed on the backrest portion 30, and the detachable member 12 can be inserted into the receiving cavity 32 and can also be removed from the receiving cavity 32. Specifically, the cover 14 is always disposed in the receiving cavity 32, and the detachable member 12 abuts against the cover 14 when inserted into the receiving cavity 32. When the detachable member 12 is removed from the receiving cavity 32, the cover 14 moves to block the opening of the receiving cavity 32. Figure 3 The detachable member 12 of the detachable unit 10 and the attached canopy mechanism 50 are schematically shown in FIG. Figure 4 ,Should Figure 4 It is a schematic diagram of a detachable component of a detachable unit according to the present application.

[0061] The detachable member 12 includes a top end 121, a connecting end 122, and a middle section 123 disposed between the top end 121 and the connecting end 122. The top end 121 abuts against the cover 14 when the detachable member 12 is inserted into the accommodating cavity 32, and the connecting end 122 can be attached with a component of the canopy mechanism 50, for example. The middle section 123 is provided with a locking portion 1231, an unlocking portion 1232, and a resetting portion 1233. The above-mentioned locking portion is, for example, in the form of a hook, and extends in a direction substantially perpendicular to the insertion direction of the detachable member 12. The above-mentioned unlocking portion 1232 and the locking portion 1231 are, for example, formed as an integral structure, and in a direction substantially perpendicular to the insertion direction of the detachable member 12, the movement of the unlocking portion 1232 can cause the locking portion 1231 to also move in the direction. The reset portion 1233 is in the form of a spring sheet in this embodiment. The movement of the unlocking portion 1232 in a direction substantially perpendicular to the insertion direction of the detachable member 12 needs to overcome the elastic force of the reset portion 1232. Therefore, after the unlocking portion 1232 is released, the reset portion 1232 in the form of a spring sheet will release its elastic force and push the locking portion 1231 to reset again, that is, move to the initial position. The unlocking portion 132 is configured to be exposed outside the accommodating cavity 32 to facilitate the manipulation of the unlocking portion 1232 from the outside of the accommodating cavity 32. At the same time, in order to avoid slipping, a corrugated structure is provided on the pressing surface of the unlocking portion 1232 to increase the friction.

[0062] Figure 5 The specific structure of the cover 14 is shown. In a preferred embodiment, Figure 5 As shown, the overall structure of the cover 14 is elliptical to match the elliptical accommodating cavity 32. Of course, other structural shapes can also be applied to the cover 14, as long as the outer contour of the cover 14 matches the contour of the accommodating cavity 32. Of course, in order to facilitate manufacturing and reduce costs, the outer contour of the cover can also be smaller than the contour of the accommodating cavity 32.

[0063] The cover 14 is in the form of a cover body, that is, it includes a cover body 141 and a side wall 142 extending vertically from the periphery of the cover body 141. A snap-fitting piece 143 is also provided on the side wall 142. In addition, in order to enable the cover 14 to move smoothly to block the opening of the accommodating chamber 32, an elastic member 16 is also provided to provide a restoring force for the movement of the cover 14. To this end, the elastic member 16 is arranged in the cover body cavity of the cover 14, that is, accommodated between the cover body 141 and the bottom opposite to the opening of the accommodating chamber 32. When the abutting top 121 of the detachable member 12 inserted in the accommodating chamber 32 abuts against the cover body 141 of the cover 14, the elastic member 16 is compressed between the cover body 141 of the cover and the bottom of the accommodating chamber 32. Once the detachable member 12 is removed from the accommodating chamber 32, the compressed elastic member provides a restoring force to push the cover 14 to move to block the opening of the accommodating chamber 32.

[0064] Next, refer to Figure 6 The operation process of the detachable unit 10 according to the present application is specifically described. Figure 6 is a schematic diagram of a detachable unit 10 according to the present application, which shows the matching relationship between the detachable component 12 and the cover 14 .

[0065] The cover 14 is always disposed in the accommodating cavity 32, and the elastic member 16 abuts between the bottom of the accommodating cavity 32 and the cover 14. In the embodiment shown in the drawings, the elastic member 16 abuts between the bottom of the accommodating cavity 32 and the cover body 141 of the cover 14. Figure 6 3 shows a state where the detachable member 12 is inserted into the accommodating cavity 32, at which time, the abutting top end 121 of the detachable member 12 abuts against the cover 14. And the locking portion 1231 of the detachable member 12 is locked in a correspondingly arranged snap-fit ​​structure in the accommodating cavity 32. In this state, the canopy mechanism 50 to which the connecting end 122 of the detachable member 12 is attached is connected to the car seat.

[0066] When the canopy mechanism 50 is not used for a long time or needs to be cleaned, the unlocking portion 1232 is pressed in a direction substantially perpendicular to the insertion direction of the detachable component 12 from the outside of the accommodating cavity 32, and the unlocking portion 1232 moves in a direction substantially perpendicular to the insertion direction. Since the unlocking portion 1232 and the locking portion 1231 form an integral structure, the locking portion 1231 also moves in a direction substantially perpendicular to the insertion direction under the drive of the unlocking portion 1232, thereby disengaging the locking portion 1231 from the corresponding locking structure arranged in the accommodating cavity 32. At this time, the detachable component 12 and the canopy mechanism 50 attached thereto can be disassembled.

[0067] When the canopy mechanism 50 needs to be attached again, the detachable member 12 only needs to be inserted into the accommodating cavity again while pressing the unlocking portion 1232. During the process of pressing the unlocking portion 1232, the resetting portion 1233 will be compressed. Therefore, when the locking portion 1232 is released after being inserted into place, the locking portion 1231 will cooperate with the corresponding engaging structure in the accommodating cavity 32 again under the restoring force of the resetting portion 1233 to lock the detachable member 12. In this way, the canopy mechanism 50 connected to the connecting end 122 of the detachable member 12 is connected to the car seat again.

[0068] According to the detachable unit 10 of the present application, the cover 14 therein is always arranged in the accommodating cavity 32. Therefore, when the canopy mechanism 50 needs to be removed, even if the detachable component 12 is removed from the accommodating cavity 32, the cover 14 will move to block the opening of the accommodating cavity 32 under the action of the elastic force of the elastic component 16, thereby improving the overall aesthetics of the detachable component 12 after removal, and at the same time avoiding the risk of the user's fingers being accidentally injured by the accommodating cavity, thereby improving safety.

[0069] The description provided herein describes various features with the aid of its preferred and exemplary embodiments. A person skilled in the art will be able to make many other embodiments, modifications and variations within the scope and spirit of the appended claims after reading this description.

Claims

1. A detachable unit, comprising: A detachable component is inserted and connected in a receiving cavity of a device and can be detached from the receiving cavity; a cover which is movably disposed in the accommodating cavity and abuts against the detachable component when the detachable component is inserted into the accommodating cavity of the device, and is movable to block the opening of the accommodating cavity when the detachable component is removed from the accommodating cavity, The detachable component is provided with an abutting top, a locking part, and an unlocking part. The abutting top is used to abut against the cover, the locking part is used to lock the detachable component in the accommodating cavity, and the unlocking part is used to unlock the lock of the detachable component in the accommodating cavity. Wherein, during the process of inserting the detachable component into the accommodating cavity in the insertion direction, the abutting top end pushes the cover so that the cover moves toward the accommodating cavity along the insertion direction.

2. The detachable unit according to claim 1, wherein: When the unlocking portion is forced to move in a direction substantially perpendicular to the insertion direction of the detachable component, the unlocking portion drives the locking portion to move in the direction substantially perpendicular to the insertion direction of the detachable component to be unlocked.

3. The detachable unit according to claim 1, wherein: The detachable component further comprises a connecting end and a middle section arranged between the abutting top end and the connecting end, the abutting top end abuts against the cover, and the connecting end is used to connect with an accessory of the device.

4. The detachable unit according to claim 3, wherein: The detachable component is further provided with a reset portion, which is used to reset the locking portion. The locking portion, the unlocking portion and the reset portion are arranged in the middle section, and the unlocking portion is exposed outside the accommodating cavity.

5. The detachable unit according to claim 1, wherein: The locking portion is in the form of a hook, which extends in a direction substantially perpendicular to the insertion direction of the detachable component, so as to be locked in a correspondingly arranged snap-fit ​​structure in the accommodating cavity when the detachable component is inserted in the accommodating cavity.

6. A detachable unit comprising: A detachable component is inserted and connected in a receiving cavity of a device and can be detached from the receiving cavity; a cover which is movably disposed in the accommodating cavity and abuts against the detachable component when the detachable component is inserted into the accommodating cavity of the device, and is movable to block the opening of the accommodating cavity when the detachable component is removed from the accommodating cavity, The detachable component is provided with an abutting top, a locking part, and an unlocking part. The abutting top is used to abut against the cover, the locking part is used to lock the detachable component in the accommodating cavity, and the unlocking part is used to unlock the lock of the detachable component in the accommodating cavity. The accommodating cavity has a non-circular contour, and the abutting top end of the detachable component and the cover have an outer contour corresponding to the accommodating cavity.

7. The detachable unit according to claim 6, wherein: The detachable unit further includes an elastic member, which is arranged between the cover and the bottom of the accommodating cavity opposite to the opening, or is arranged at the bottom of the cover.

8. The detachable unit according to claim 7, wherein: The sealing cover is in the form of a cover body, comprising a cover body and a side wall extending vertically from the periphery of the cover body, and a clamping piece is arranged on the side wall.

9. The detachable unit according to claim 6, wherein: The abutment top of the detachable member and the cover have a racetrack-shaped outer contour.

10. A detachable unit comprising: A detachable component is inserted and connected in a receiving cavity of a device and can be detached from the receiving cavity; a cover which is movably disposed in the accommodating cavity and abuts against the detachable component when the detachable component is inserted into the accommodating cavity of the device, and is movable to block the opening of the accommodating cavity when the detachable component is removed from the accommodating cavity, The detachable component is provided with an abutting top, a locking part, and an unlocking part. The abutting top is used to abut against the cover, the locking part is used to lock the detachable component in the accommodating cavity, and the unlocking part is used to unlock the lock of the detachable component in the accommodating cavity. Wherein, a snap-fit ​​piece is provided on the cover, and a snap-fit ​​structure is provided in the accommodating cavity. When the detachable component is inserted into the accommodating cavity, the locking portion can engage with the snap-fit ​​structure to retain the detachable component in the accommodating cavity. When the detachable component is removed from the accommodating cavity, the cover moves toward the opening of the accommodating cavity and is maintained in a position of blocking the opening of the accommodating cavity through the cooperation between the snap-fit ​​piece and the snap-fit ​​mechanism.

11. The detachable unit according to claim 10, wherein: The sealing cover is in the form of a cover body, comprising a cover body and a side wall extending vertically from the periphery of the cover body, and a plurality of the engaging members are symmetrically arranged on the side wall.

12. The detachable unit according to claim 11, wherein: The engaging structure is formed as a recessed portion in the accommodating cavity, the locking portion is formed as a hook, and the engaging member is formed as a protruding portion on the side wall of the cover body.

13. A car seat, comprising: a backrest portion, wherein the accommodating cavity is formed on the backrest portion; as well as The detachable unit according to any one of claims 1 to 12, wherein the cover of the detachable unit is always arranged in the accommodating cavity.

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