Automobile cushion air bag

Abstract

The utility model discloses an automobile seat cushion air bag which comprises an air bag and an air guide bag arranged in the air bag, the air bag comprises two opposite air bag cloth pieces, an air bag generator hole position is formed in the middle of one air bag cloth piece, the air guide bag and the air bag generator hole position are arranged in an up-down corresponding mode, the air guide bag comprises two opposite air guide cloth pieces, and the air guide cloth pieces are arranged on the air guide bag. The edges of the two air guide cloth pieces are sewn to form at least two opposite air outlets, the two air outlets are located in the width direction or the length direction of the bag, and one air guide cloth piece is provided with an air guide bag generator hole position corresponding to the bag generator hole position; the two air guide cloth pieces are connected with the two corresponding bag cloth pieces in a sewing mode through sewing thread parts so that a thickness limiting area can be formed in the middle of the bag, and the sewing thread parts are used for limiting the expansion thickness of the thickness limiting area through the expansion thickness of the inflated air guide bag. According to the utility model, the air guide bag is connected with the bag through the sewing threads, so that the expansion thickness of the bag is optimized, and the contact area between the upper surface of the bag and the buttocks of a passenger is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive airbags, and particularly relates to an automotive seat cushion airbag. Background Art

[0002] With the development of new energy vehicles and autonomous driving technologies, occupants may sit in the vehicle in a largely inclined posture. Compared with the traditional sitting posture, this sitting posture is more likely to cause problems such as occupant submarining (the body slides downward), increased spinal stress, and increased abdominal pressure during a collision event. At the same time, there is also the problem of the seat belt strangling the occupant's neck. Therefore, existing new energy vehicles are equipped with anti-submarining airbags on the seat cushion to protect the occupants and prevent them from submarining during a collision event.

[0003] As Figure 1 shown, the existing anti-submarining airbag is usually formed by stitching upper and lower fabric pieces at the back, and holes for the gas generator are reserved to inflate in case of an accident. After the anti-submarining airbag is inflated, the overall airbag forms a D-shaped structure, and the part in contact with the occupant is not a uniform plane, which may cause uneven distribution of the force received by the occupant, undoubtedly reducing the protection effect of the anti-submarining airbag.

[0004] Currently, no effective solution has been proposed for the problem that the airbag formed after inflation of the existing anti-submarining airbag causes uneven distribution of the force received by the occupant. Summary of the Utility Model

[0005] In view of this, embodiments of the present utility model provide an automotive seat cushion airbag to at least solve the problem that the airbag formed after inflation of the existing anti-submarining airbag causes uneven distribution of the force received by the occupant.

[0006] Embodiments of the present utility model provide the following technical solutions:

[0007] Embodiments of the present utility model provide an automotive seat cushion airbag, including an airbag and an air guide bag disposed inside the airbag. The airbag includes two relatively arranged airbag fabric pieces, and the edges of the two airbag fabric pieces are stitched to form the airbag. A gas generator hole is provided at the middle position of one of the airbag fabric pieces. The air guide bag is disposed corresponding to the gas generator hole of the airbag up and down. The air guide bag includes:

[0008] Two relatively arranged air guide fabric pieces, and the edges of the two air guide fabric pieces are stitched to form at least two relatively arranged air outlets. The two air outlets are located in the width direction or the length direction of the airbag. A gas generator hole corresponding to the gas generator hole of the airbag is provided on one of the air guide fabric pieces;

[0009] Both of the two air guide fabric pieces are sewn and connected to the corresponding two bladder fabric pieces through a sewing part, so as to form a thickness-limiting area in the middle of the bladder. The sewing part is used to limit the expansion thickness of the thickness-limiting area through the expansion thickness of the air guide bag after inflation.

[0010] Further, the sewing part includes a plurality of sub-sewing parts arranged at intervals, and each sub-sewing part correspondingly sews and fixes the air guide fabric piece and the corresponding bladder fabric piece.

[0011] Further, each sub-sewing part has a preset length and is arranged along the length direction or the width direction of the bladder. The preset length is used to limit the size of the thickness-limiting area.

[0012] Further, the sewing part has a preset inclination angle in the length direction or the width direction of the bladder. The preset inclination angle is used to limit the shape of the thickness-limiting area.

[0013] Further, the air guide bag has at least two relatively arranged air outlets in both the width direction and the length direction of the bladder.

[0014] Further, the sewing part has a preset distance from the edge sewing line of the air guide bag. The preset distance is used to adjust the expansion thickness of the bladder after inflation.

[0015] Further, each bladder fabric piece is two-layer;

[0016] The air guide fabric piece is sewn and connected to at least one layer of the corresponding bladder fabric piece through the sewing part.

[0017] Further, the vehicle seat cushion airbag further includes:

[0018] A weakening part, which is sewn between the two air guide fabric pieces, is located on the side of the sewing part away from the edge of the air guide bag, and is correspondingly arranged with at least one air outlet of the air guide bag to adjust the gas flow direction.

[0019] Further, there are at least two weakening parts, and they are correspondingly arranged with at least two relatively arranged air outlets of the air guide bag in the length direction of the bladder.

[0020] Further, at least one end of the two bladder fabric pieces is integrally connected.

[0021] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the embodiments of the present invention at least include:

[0022] An airbag for an automobile seat cushion of the present utility model can limit the thickness of the middle part of the airbag by the expansion thickness of the air guide bag, so as to form a thickness-limiting area, and make the middle part of the airbag form a substantially flat surface. By arranging the air guide bag in the middle of the airbag and sewing and fixing the air guide cloth piece of the air guide bag and the airbag cloth piece of the airbag through the sewing part, the airbag supports the occupant evenly, solves the problem that the force received by the occupant is unevenly distributed due to the airbag formed after inflation of the existing anti-submergence airbag, and improves the support and comfort of the automobile seat cushion airbag for the occupant's buttocks after deployment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a top view of an existing seat airbag;

[0025] Figure 2 It is a horizontal cross-sectional view of the seat airbag of the present utility model;

[0026] Figure 3 It is a longitudinal cross-sectional view of the seat airbag of the present utility model;

[0027] Figure 4 It is a horizontal cross-sectional view (I) of the seat airbag with a weakening part of the present utility model;

[0028] Figure 5 It is a horizontal cross-sectional view (I) of the seat airbag with a weakening part of the present utility model;

[0029] Figure 6 It is a horizontal cross-sectional view (I) of the seat airbag with a weakening part of the present utility model;

[0030] Figure 7 It is a horizontal cross-sectional view (I) of the seat airbag with a weakening part of the present utility model.

[0031] The reference numerals of the present utility model are as follows:

[0032] 10. Airbag; 11. Airbag cloth piece;

[0033] 20. Air guide bag; 21. Air guide cloth piece; 22. Air outlet;

[0034] 30. Sewing part; 31. Sub-sewing part;

[0035] 40. Weakening part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0037] The following specific examples illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0038] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionality in addition to one or more of the aspects described herein.

[0039] It should also be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application. The drawings only show the components related to the present application, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0040] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the examples can be practiced without these specific details.

[0041] In the existing seat cushion airbag, since there is no restriction in the middle of the airbag 10, after the airbag 10 is inflated and deployed, a hemispherical structure will be formed when there is no occupant sitting above the airbag 10. When there is an occupant sitting on the seat cushion airbag and a collision event occurs, the force on the occupant's buttocks is uneven. During the deployment process of the airbag 10, the airbag 10 will cause the occupant to roll over.

[0042] In addition, due to the lack of restriction in the middle of the airbag 10, the airbag 10 will quickly expand upward, which will undoubtedly cause discomfort to the occupant and make it difficult for the occupant to maintain body balance during a collision. If the occupant bounces up during a minor collision and has difficulty maintaining body balance, it may cause additional harm to the occupant.

[0043] Based on this, the embodiment of this specification proposes a processing solution: As shown in FIGS. 2 to 3, for an automotive seat cushion airbag of the present invention, after the air guide bag 20 is disposed in the middle of the airbag 10, the air guide cloth piece 21 of the air guide bag 20 is sewn and fixed to the corresponding airbag cloth piece 11 by the sewing part 30. Thus, after the airbag 10 is inflated and deployed, the thickness in the middle of the airbag 10 is restricted by the sewing part 30 to be the same as the thickness of the air guide bag 20. Since the size and expansion thickness of the air guide bag 20 are much smaller than those of the airbag 10, the airbag 10 can be prevented from forming a hemispherical structure as a whole.

[0044] The following will describe the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.

[0045] As Figures 2 to 4 shown, an automotive seat cushion airbag of the present invention includes an airbag 10 and an air guide bag 20 disposed in the airbag 10. The airbag 10 includes two oppositely disposed airbag cloth pieces 11. The edges of the two airbag cloth pieces 11 are sewn to form the airbag 10. A gas generator hole is provided at the middle position of one airbag cloth piece 11. The air guide bag 20 is disposed corresponding to the gas generator hole up and down.

[0046] Among them, the airbag 10 is used to expand after inflation to protect the occupant's buttocks.

[0047] Among them, the gas generator hole is used to install a gas generator so that after the gas generator is detonated, gas enters the air guide bag 20 and then enters the airbag 10 through the air guide bag 20.

[0048] Among them, the air guide bag 20 is used to guide the gas generated by the gas generator and direct the gas into the airbag 10 so that the airbag 10 expands and bulges.

[0049] The air guide bag 20 includes two oppositely disposed air guide cloth pieces 21, and the edges of the two air guide cloth pieces 21 are sewn to form at least two oppositely disposed air outlets 22. The two air outlets 22 are located in the width direction or the length direction of the airbag 10. A gas generator hole of the air guide bag 20 corresponding to the gas generator hole is provided on one air guide cloth piece 21. The two air guide cloth pieces 21 are both sewn and connected to the corresponding two airbag cloth pieces 11 by the sewing part 30 to form a thickness-limiting area in the middle of the airbag 10. The sewing part 30 is used to limit the expansion thickness of the thickness-limiting area by the expansion thickness of the air guide bag 20 after inflation.

[0050] Among them, after the two air guiding cloth pieces 21 are overlapped and aligned, the edges of the two air guiding cloth pieces 21 are sewn and fixed with stitches, and an air outlet 22 is reserved to form an airbag structure.

[0051] Among them, after the air guiding bag 20 is installed in the airbag 10, a preset distance is provided between the four edges of the air guiding bag 20 and the four edges of the airbag 10, so that the edge part of the airbag 10 can wrap around the occupant's buttocks after fully bulging, avoiding the displacement of the occupant's buttocks during a collision event, such as avoiding the forward movement, leftward movement or rightward movement of the occupant's buttocks.

[0052] In the present utility model, the width direction of the airbag 10 can be understood as the width direction of the vehicle after the airbag 10 is installed on the vehicle; the length direction of the airbag 10 can be understood as the length direction of the vehicle after the airbag 10 is installed on the vehicle.

[0053] Among them, when the two air outlets 22 of the air guiding bag 20 are located in the width direction of the airbag 10, if the air guiding bag 20 is inflated, the gas can preferentially flow from the two air outlets 22 to both sides in the width direction of the airbag 10, so that both sides in the width direction of the airbag 10 bulge first, avoiding the leftward or rightward movement of the occupant's buttocks.

[0054] Among them, when the two air outlets 22 of the air guiding bag 20 are located in the length direction of the airbag 10, if the air guiding bag 20 is inflated and expanded, the gas can preferentially flow from the two air outlets 22 to both sides in the length direction of the airbag 10, so that both sides in the length direction of the airbag 10 bulge first, in order to avoid the occupant from diving.

[0055] Among them, the air guiding bag 20 generator hole positions are used to install a gas generator.

[0056] Among them, the two air guiding cloth pieces 21 can be an integral structure or a split structure.

[0057] Specifically, when the airbag 10 and the air guiding bag 20 are in a flat state, the upper air guiding cloth piece 21 and the upper airbag cloth piece 11 are sewn and fixed with a sewing part 30, and the lower air guiding cloth piece 21 and the lower airbag cloth piece 11 are sewn and fixed, so that the air guiding bag 20 and the airbag 10 are sewn and connected through the sewing part.

[0058] More specifically, when the airbag 10 and the air guiding bag 20 are inflated with gas and expanded, since the expansion thickness of the air guiding bag 20 is smaller than the expansion thickness in the middle of the airbag 10, the sewing part 30 limits the expansion thickness in the middle of the airbag 10 to be close to the expansion thickness of the air guiding bag 20, avoiding the formation of a hemispherical structure in the middle of the airbag 10, so that the thickness-limiting area in the middle of the airbag 10 has a certain degree of concavity or flatness, in order to better support the occupant's buttocks.

[0059] In some of these embodiments, according to the different inflation thicknesses of the air guide bag 20 and the lengths of the sewing parts 30, the height after inflation of the thickness-limiting area formed in the middle of the airbag 10 is less than the height after inflation of the edge of the airbag 10, so that the overall airbag 10 forms a concave structure after inflation to stably support the occupant's buttocks.

[0060] In some of these embodiments, according to the different inflation thicknesses of the air guide bag 20 and the lengths of the sewing parts 30, the height after inflation of the thickness-limiting area formed in the middle of the airbag 10 is close to the height after inflation of the edge of the airbag 10, preferably equal, so that the highest point in the middle of the airbag 10 is close to or equal to the highest point of the edge of the airbag 10 after the airbag 10 is inflated, so that the upper surface of the airbag 10 after inflation is generally a flat structure to stably support the occupant's buttocks.

[0061] In some of these embodiments, according to the different inflation thicknesses of the air guide bag 20 and the lengths of the sewing parts 30, the height after inflation of the thickness-limiting area formed in the middle of the airbag 10 is slightly higher than the height after inflation of the edge of the airbag 10, and the highest point of the thickness-limiting area is close to the highest point of the edge of the airbag 10 under the pressure of the occupant's buttocks after inflation and expansion.

[0062] Among them, the inflation thickness of the air guide bag 20 is related to its own size. When the size of the air guide bag 20 is large, the inflation thickness of the air guide bag 20 is large; when the size of the air guide bag 20 is small, the inflation thickness of the air guide bag 20 is small.

[0063] Among them, the sewing part 30 includes multiple sub-sewing parts 31 arranged at intervals, and each sub-sewing part 31 sews and fixes the air guide cloth piece 21 and the corresponding airbag cloth piece 11.

[0064] In some of these embodiments, the sewing part 30 includes four sub-sewing parts 31. Two of the sub-sewing parts 31 are arranged at one edge of the two air guide cloth pieces 21 in the width direction or the length direction and are arranged at intervals to form an air outlet 22; the other two sub-sewing parts 31 are arranged at the other edge of the two air guide cloth pieces 21 in the width direction or the length direction and are arranged at intervals to form another air outlet 22.

[0065] In some of these embodiments, the air guide bag 20 has multiple air outlets 22, and the sewing part 30 includes two sub-sewing parts 31. One of the sub-sewing parts 31 is arranged in the middle of one edge of the two air guide cloth pieces 21 in the length direction or the width direction and forms two air outlets 22; the other sub-sealing part is arranged in the middle of the other edge of the two air guide cloth pieces 21 in the length direction or the width direction and forms two air outlets 22.

[0066] In some of these embodiments, the suture part 30 includes a plurality of sub - suture parts 31, and is disposed on the four edges of the two air - guiding cloth pieces 21 to form air outlets 22 in both the width direction and the length direction of the pocket 10.

[0067] Among them, the sub - suture part 31 has a preset length and is disposed along the length direction or the width direction of the pocket 10. The preset length is used to limit the size of the thickness - reducing area.

[0068] For example, when there are two sub - suture parts 31, which are respectively disposed on two edges of the two air - guiding cloth pieces 21, when the preset length of the sub - suture part 31 in the length direction or the width direction of the pocket 10 is longer, the thickness - reducing area on the pocket 10 is also longer; when the preset length of the suture part 30 in the length direction or the width direction of the pocket 10 is shorter, the thickness - reducing area is also shorter.

[0069] Among them, the suture part 30 has a preset inclination angle in the length direction or the width direction of the pocket 10. The preset inclination angle is used to limit the shape of the thickness - reducing area.

[0070] For example, when there are two sub - suture parts 31 and they are respectively disposed on two edges of the two air - guiding cloth pieces 21, the two sub - suture parts 31 can be arranged in a V - shaped structure to change the shape of the thickness - reducing area.

[0071] In some of these embodiments, the suture part 30 has a preset distance from the edge suture of the air - guiding bag 20. The preset distance is used to adjust the expansion thickness of the thickness - reducing area after inflation.

[0072] Specifically, the sub - suture part 31 has a preset distance from the edge suture of the air - guiding bag 20.

[0073] Among them, when the preset distance between the sub - suture part 31 and the edge suture of the air - guiding bag 20 is larger, the expansion thickness of the thickness - reducing area of the pocket 10 can be increased, and the size of the thickness - reducing area can be reduced; when the preset distance between the sub - suture part 31 and the edge suture of the air - guiding bag 20 is smaller, the expansion thickness of the air - guiding bag 20 can be reduced, and the size of the thickness - reducing area can be increased.

[0074] In the actual application process, the specific value of the preset distance can be flexibly adjusted according to requirements.

[0075] Furthermore, each pocket cloth piece 11 is two - layer; the air - guiding cloth piece 21 is sewn and connected to at least one corresponding pocket cloth piece 11 through the suture part 30.

[0076] Preferably, the air - guiding cloth piece 21 is connected to the inner - layer pocket cloth piece 11 through the sub - suture part 31 to prevent gas leakage from the suture.

[0077] Furthermore, as Figures 4 to 7As shown, the airbag of the car seat cushion further includes a weakening portion 40. The weakening portion 40 is sewn between two air guide cloth pieces 21, and is located on the side of the sewing portion 30 away from the edge of the air guide bag 20, and is correspondingly arranged with at least one air outlet 22 of the air guide bag 20 to adjust the gas flow direction.

[0078] For example, when the air guide bag 20 has air outlets 22 in both the length direction and the width direction of the airbag 10, the weakening portion 40 can be set to two, and are respectively correspondingly arranged with the air outlets 22 located in the length direction or the width direction of the airbag 10, so that the gas preferentially flows to both sides in the length direction of the airbag 10 or both sides in the width direction of the airbag 10.

[0079] Preferably, the weakening portion 40 is at least two, and is correspondingly arranged with at least two oppositely arranged air outlets 22 of the air guide bag 20 in the length direction of the airbag 10.

[0080] Furthermore, at least one end of the two airbag cloth pieces 11 is integrally connected to reduce the manufacturing process of forming the airbag 10.

[0081] The working principle of the present utility model is as follows:

[0082] When using the gas generator to inflate the air guide bag 20, the gas enters the air guide bag 20 and flows into the airbag 10 through the air outlet 22 of the air guide bag 20;

[0083] When the air guide bag 20 and the airbag 10 expand, the expansion thickness of the middle part of the airbag 10 is close to the expansion thickness of the air guide bag 20 under the restriction of the sewing portion 30, so as to avoid the airbag 10 completely expanding into a hemispherical structure, and to make the upper surface of the airbag 10 form a substantially flat structure to better support the occupant's buttocks.

[0084] The present utility model adds an air guide bag 20 to the seat cushion airbag, and optimizes the air outlet direction of the air guide bag 20 through sewing, so as to constrain the area with a large original detonation thickness, control the detonation thickness at the middle of the airbag 10, so that the upper surface of the airbag 10 forms a substantially flat structure or a slightly convex structure, increases the area of the occupant's buttocks in contact with the airbag 10, makes the force on the occupant's buttocks more uniform, and also specifically avoids the influence of the seat sewing on the airbag deployment.

[0085] In this specification, the same or similar parts among the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the product embodiments described later, since they correspond to the method, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiments.

[0086] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An airbag for an automotive seat cushion, comprising an airbag and an air guide bag disposed within the airbag. The airbag includes two relatively disposed airbag fabric pieces, characterized in that, A pocket generator hole is provided at the middle position of the pocket fabric piece, and the air guide bag is arranged corresponding to the pocket generator hole up and down. The air guide bag includes: Two oppositely arranged air guide fabric pieces, and the edges of the two air guide fabric pieces are sewn to form at least two oppositely arranged air outlets. The two air outlets are located in the width direction or the length direction of the pocket. An air guide bag generator hole corresponding to the pocket generator hole is provided on one of the air guide fabric pieces; Both of the two air guide fabric pieces are sewn and connected to the corresponding two pocket fabric pieces through the sewing line part, so as to form a thickness-limiting area in the middle of the pocket. The sewing line part is used to limit the expansion thickness of the thickness-limiting area through the expansion thickness of the air guide bag after inflation.

2. The car seat cushion airbag according to claim 1, characterized in that, The sewing line part includes multiple sub-sewing line parts arranged at intervals, and each sub-sewing line part correspondingly sews and fixes the air guide fabric piece and the corresponding pocket fabric piece.

3. The car seat cushion airbag according to claim 2, wherein Each sub-sewing line part has a preset length and is arranged along the length direction or the width direction of the pocket. The preset length is used to limit the size of the thickness-limiting area.

4. The car seat cushion airbag according to claim 3, characterized in that, The sewing line part has a preset inclination angle in the length direction or the width direction of the pocket. The preset inclination angle is used to limit the shape of the thickness-limiting area.

5. The car seat cushion airbag according to claim 2, wherein The air guide bag has at least two oppositely arranged air outlets in both the width direction and the length direction of the pocket.

6. The car seat cushion airbag according to any one of claims 1 to 5, characterized in that, The sewing line part has a preset distance from the edge sewing line of the air guide bag. The preset distance is used to adjust the expansion thickness of the pocket after inflation.

7. The car seat cushion airbag according to claim 6, characterized in that Each pocket fabric piece is two-layer; The air guide fabric piece is sewn and connected to at least one layer of the corresponding pocket fabric piece through the sewing line part.

8. The car seat cushion airbag according to claim 5, wherein Further included: A weakening part, which is sewn between the two air guide fabric pieces, is located on the side of the sewing line part away from the edge of the air guide bag, and is arranged corresponding to at least one air outlet of the air guide bag to adjust the gas flow direction.

9. The car seat cushion airbag according to claim 8, characterized in that, There are at least two weakening parts, and they are arranged corresponding to at least two oppositely arranged air outlets of the air guide bag in the length direction of the pocket.

10. The car seat cushion airbag according to claim 1, characterized in that, At least one end of the two pocket fabric pieces is integrally connected.

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