Massage eyeshade

Abstract

The massage eyeshade comprises an outer sleeve, an air bag and a lining piece, the outer sleeve comprises an inner side part and an outer side part, the inner side part is configured to be opposite to the face of the human body during use, the outer sleeve is provided with a containing space, the containing space is located between the inner side part and the outer side part, and the air bag is arranged in the containing space; the air bag can extrude the inner side part when inflated and expanded, the lining piece is arranged in the containing space, the inner side part comprises a first area corresponding to a human eyeball area, the lining piece is fixedly connected to the first area, and the air bag is limited between the inner side part and the lining piece. When the air bag is inflated and expanded, the lining piece can be extruded, so that the lining piece generates pulling force on at least part of the first area in the direction deviating from the human face, the situation that the first area of the inner side part protrudes towards the human face due to the extrusion effect of the air bag is avoided, eyeballs are not prone to being pressed during use, and the wearing comfort is improved.

Description

Technical Field

[0001] This invention relates to the field of eye massager technology, and in particular to a massage eye mask. Background Technology

[0002] To relieve eye fatigue, various massage eye masks have been launched on the market, with airbag massage eye masks dominating the market. The main structure of these eye masks generally includes an outer cover containing an air pump, a solenoid valve, and an airbag. The air pump provides compressed gas, and by controlling the on / off state of the solenoid valve, the airbag inflates and deflates, thus creating an air pressure massage around the eyes. However, in existing massage eye masks, when the airbag inflates and compresses the outer cover, the area of ​​the cover corresponding to the eyeball bulges outward, potentially compressing the eyeball and affecting wearing comfort. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings and deficiencies of the prior art by providing a comfortable massage eye mask.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A massage eye mask, the massage eye mask comprising: An overcoat, the overcoat including an inner portion and an outer portion, the inner portion being configured to face the human face when in use, the overcoat having a receiving space located between the inner portion and the outer portion; An airbag is disposed within the accommodating space, and when the airbag is inflated, it can compress the inner portion; The massage eye mask also includes: A liner, wherein the liner is disposed within the accommodating space; The inner portion includes a first region corresponding to the human eyeball region, the liner is fixedly connected to the first region, and the airbag is located between the inner portion and the liner; When the airbag inflates, it can compress the liner, causing the liner to exert a pulling force on the first area in a direction away from the human face.

[0006] Furthermore, the first region extends along the length of the massage eye mask and is configured to cover both eyeballs of the human body during use. The liner is a sheet extending along the length of the massage eye mask and is adapted to fit the first region along the length of the massage eye mask.

[0007] Furthermore, the inner portion includes a second region corresponding to the human eye periorbital region, and the first region is recessed toward the outer portion relative to the second region.

[0008] Furthermore, the outer garment is a flexible outer garment.

[0009] Furthermore, the liner is a flexible liner.

[0010] Furthermore, the liner is a flexible plastic sheet.

[0011] Furthermore, the liner includes a first liner and a second liner stacked on top of each other, the area of ​​the second liner being larger than the area of ​​the first liner, the first liner being located between the inner portion and the second liner, the first liner being fixedly connected to the first region, the second liner being fixedly connected to the first liner, and the airbag being located between the inner portion and the second liner.

[0012] Furthermore, the thickness of the second liner is greater than the thickness of the first liner.

[0013] Furthermore, the massage eye mask includes a support, which is disposed within the accommodating space and located between the outer portion and the airbag; the support includes a first portion, a second portion and a first connecting portion, the first portion and the second portion being arranged at intervals along the length direction of the massage eye mask, the first portion and the second portion being connected through the first connecting portion, the first connecting portion being flexible, and the first portion and the second portion being able to bend relative to each other through the first connecting portion; The massage eye mask includes an air pump, a solenoid valve, a battery, and a circuit board. The air pump, the solenoid valve, the battery, and a portion of the circuit board are installed in the first part, and the air pump, the solenoid valve, the battery, and a portion of the circuit board are installed in the second part. The air pump, the solenoid valve, and the battery are electrically connected to the circuit board, and the air pump, the solenoid valve, and the airbag are connected in sequence through pipes.

[0014] Furthermore, the support includes a plurality of support unit parts, some of which are located in the first part and some of which are located in the second part. The support includes a second connecting part and a third connecting part. Two adjacent support unit parts located in the first part are connected through the second connecting part, and two adjacent support unit parts located in the second part are connected through the third connecting part. The second connecting portion is flexible, allowing two adjacent support unit portions located in the first portion to bend relative to each other via the second connecting portion; and / or, the third connecting portion is flexible, allowing two adjacent support unit portions located in the second portion to bend relative to each other via the third connecting portion.

[0015] The beneficial effects of the present invention are as follows: The massage eye mask provided by the present invention has an outer cover comprising an inner part and an outer part, and the outer cover has an accommodating space located between the inner part and the outer part. An airbag and a liner are disposed in the accommodating space. The liner is fixedly connected to a first area of ​​the inner part corresponding to the human eyeball area. The airbag is located between the inner part and the liner. During the use of the massage eye mask, when the airbag is inflated, it can compress the liner, so that the liner can generate a pulling force on the first area in the direction away from the human face, thereby avoiding the first area of ​​the inner part from bulging towards the human face due to the compression of the airbag. Therefore, it is not easy to compress the eyeball during use, which is conducive to improving wearing comfort. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall exploded structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the liner structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the mounting structure of the bracket of the present invention with the air pump, solenoid valve, battery and circuit board.

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the support frame of the present invention.

[0020] Figure 5 This is a cross-sectional view of the support structure of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the support and airbag of the present invention.

[0022] Figure 7 This is a schematic diagram of the pipeline connection structure between the air pump, solenoid valve, and airbag of the present invention.

[0023] Figures 1 to 7 middle: 10. Outer garment; 11. Inner part; 111. First area; 112. Second area; 12. Outer part; 20. Airbag; 201. Air intake C; 30. Liner; 31. First liner; 32. Second liner; 40. Bracket; 41. First part; 42. Second part; 43. First connecting part; 44. Bracket unit part; 441. Base; 442. Housing; 443. Mounting area; 45. Second connecting part; 451. Raised part A; 46. Third connecting part; 461. Raised part B; 50. Air pump; 501. Air inlet A; 502. Air outlet A; 60. Solenoid valve; 601. Air inlet B; 602. Air outlet B; 70. Battery; 80. Circuit board; 90. Heating element; 101. First trachea; 102. Second trachea; 103. Third trachea; 104. Adapter; 1041. Inlet; 1042. Outlet; 121. First flexible filler layer; 122. Second flexible filler layer; 1221. Groove. Detailed Implementation

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] See Figures 1 to 7 This invention provides a flexible massage eye mask, which includes an outer cover 10. The outer cover 10 is flexible, for example, it can be a cloth cover, a leather cover, etc., which not only allows the massage eye mask to be bent as needed, but also improves the wearing comfort of the massage eye mask. The outer cover 10 includes an inner portion 11 and an outer portion 12, which can be connected by stitching. The inner portion 11 is configured to face the human face when in use, that is, when the massage eye mask is in use, the inner portion 11 of the outer cover 10 faces the human face. The massage eye mask also includes a receiving space (not marked in the figure), which is located between the inner portion 11 and the outer portion 12.

[0026] The massage eye mask also includes an airbag 20, a liner 30, a support 40, functional components, and a flexible filling layer, all housed within the receiving space. The functional components include an air pump 50, a solenoid valve 60, a battery 70, a circuit board 80, and a heating element 90. The air pump 50, solenoid valve 60, battery 70, and heating element 90 are electrically connected to the circuit board 80. The air pump 50, solenoid valve 60, and airbag 20 are connected sequentially via tubing. The air pump 50 and solenoid valve 60 control the inflation and deflation of the airbag 20. When the airbag 20 inflates, it compresses the inner portion 11, causing it to deform under the air pressure. When the airbag 20 deflates, the pressure on the inner portion 11 gradually decreases, allowing it to return to its original position due to its flexibility. Thus, through the inflation and deflation of the airbag 20, an air pressure massage effect is achieved around the eyes. The heat generated by the heating element 90 during operation can be transferred to the inner part 11, thereby achieving the effect of hot compress therapy on the area around the eyes.

[0027] See Figure 6 and Figure 7The piping system includes a first air pipe 101, a second air pipe 102, a third air pipe 103, and an adapter 104. The air pump 50 has an inlet A501 and an outlet A502. The inlet A501 is open to the atmosphere. When the air pump 50 is started, it draws outside air from the inlet A501 into its pump chamber and then discharges it from the outlet A502. There is at least one solenoid valve 60, which has an inlet B601 and an outlet B602. The airbag 20 has at least one inlet C201, and there is at least one second air pipe 102 and one third air pipe 103.

[0028] In this embodiment, for ease of air circuit connection, both the second air pipe 102 and the third air pipe 103 are arranged in an "L" shape. The adapter 104 has an air inlet end 1041 and at least one air outlet end 1042. The air inlet end 1041 and the air outlet end 1042 are connected. The air inlet end 1041 is connected to the air outlet A502 through the first air pipe 101. The air outlet end 1042 is connected to the corresponding air inlet B601 through the second air pipe 102. The air outlet B602 is connected to the air inlet C201 through the corresponding third air pipe 103.

[0029] To enhance the massage effect of the massage eye mask, two solenoid valves 60 are provided. The air inlet B601 of one solenoid valve 60 is connected to one of the air outlets 1042 of the adapter 104 via a corresponding second air pipe 102. The air outlet B602 of the solenoid valve 60 is connected to one of the air inlets C201 of the airbag 20 via a corresponding third air pipe 103. The air inlet B601 of the other solenoid valve 60 is connected to the other air outlet 1042 of the adapter 104 via a corresponding second air pipe 102. The air outlet B602 of the other solenoid valve 60 is connected to the other air inlet C201 of the airbag 20 via a corresponding third air pipe 103.

[0030] Solenoid valve 60 is a two-position three-way solenoid valve 60. Solenoid valve 60 includes a valve core (not shown in the figure) and an exhaust port B (not shown in the figure). The exhaust port B is connected to the atmosphere. The valve core can control the switching of the air outlet B602 with the air inlet B601 and the exhaust port B. Preferably, the solenoid valve 60 is a normally closed two-position three-way solenoid valve 60. During use, when the solenoid valve 60 is de-energized, the valve core controls the solenoid valve 60 to connect the outlet B602 and the exhaust port B. At this time, the gas inside the airbag 20 is discharged through the inlet C201, the outlet B602 and the exhaust port B, realizing the deflation and contraction of the airbag 20. When the solenoid valve 60 is energized, the valve core controls the solenoid valve 60 to connect the outlet B602 and the inlet B601. At this time, the compressed gas generated by the air pump 50 can enter the airbag 20 through the outlet A502, the adapter 104, the inlet B601, the outlet B602 and the inlet C201, realizing the inflation and expansion of the airbag 20.

[0031] See Figure 1 The inner portion 11 includes a first region 111 corresponding to the human eyeball area and a second region 112 corresponding to the human eye periorbital area. When the airbag 20 inflates, it presses the first region 111 and the second region 112 towards the human face, causing the second region 112 to bulge towards the human face, thus providing a squeezing and massaging effect on the human eye periorbital area. Since the first region 111 is connected to the liner 30, it does not bulge towards the human face. The first region 111 is concave relative to the second region 112 towards the outer portion 12. With this massage eye mask, the first region 111 is less likely to compress the human eyeball during use, resulting in higher wearing comfort. Because the first region 111 is concave relative to the second region 112, even when the device is off (i.e., when the airbag is not working), the first region 111 is less likely to compress the eyeball.

[0032] See Figure 1 and Figure 2 The liner 30 is fixedly connected to the first region 111, and the airbag 20 is confined between the inner portion 11 and the liner 30. When the airbag 20 inflates, it can compress the first region 111 and the second region 112 towards the face, and it can also compress the liner 30 away from the face. During the compression of the liner 30, the airbag 20 causes the liner 30 to exert a pulling force on at least a portion of the first region 111 in the direction away from the face. For example, the liner 30 can apply a pulling force to the center of the first region 111 to prevent the first region 111 from bulging towards the face, or the liner 30 can apply a pulling force to the entire first region 111 to prevent the first region 111 from bulging towards the face.

[0033] By utilizing the tension of the liner 30 on the first area 111, the compression effect of the airbag 20 during inflation can be prevented from causing the first area 111 to bulge towards the face. This type of massage eye mask is less likely to compress the eyeballs during use, thus improving wearing comfort. When the airbag 20 deflates and contracts, the compressive force of the airbag 20 on the liner 30 gradually decreases, and at the same time, the tension of the liner 30 on the first area 111 also gradually decreases.

[0034] The first region 111 extends along the length of the massage eye mask. The first region 111 is configured to cover both eyeballs of the user during use; that is, when wearing the massage eye mask, the area containing both eyeballs is covered by the first region 111. The liner 30 is a sheet extending along the length of the massage eye mask, and it is fitted to the first region 111 along the length of the massage eye mask. By setting both the first region 111 and the liner 30 to extend along the length of the massage eye mask, it avoids having two independent first regions 111 on the inner part 11, thus simplifying the structure of the massage eye mask.

[0035] In this embodiment, the liner 30 is a flexible liner to adapt to the use requirements of the massage eye mask under flexible bending conditions. Preferably, the liner 30 is a flexible plastic sheet, for example, the liner 30 can be made of materials such as PVC or PE. Such a liner 30 can not only meet the requirements of flexible use, but also ensure that the liner 30 can pull the first area 111 when the airbag 20 is inflated.

[0036] See Figure 1 and Figure 2 The lining 30 includes a first lining sheet 31 and a second lining sheet 32 ​​stacked on top of each other. The first lining sheet 31 is located between the inner portion 11 and the second lining sheet 32. The first lining sheet 31 is fixedly connected to the first region 111, and the second lining sheet 32 ​​is fixedly connected to the first lining sheet 31. In this embodiment, the first lining sheet 31 and the first region 111, and the first lining sheet 31 and the second lining sheet 32, can be fixed by sewing, ultrasonic welding, bonding, or other methods. The airbag 20 is located between the inner portion 11 and the second lining sheet 32. The double-layer structure of the lining 30 improves the force transmission effect. When the airbag 20 inflates and compresses the lining 30, it helps the lining 30 generate a greater pulling force on the first region 111 in the direction away from the human face.

[0037] In this embodiment, the area of ​​the second liner 32 is larger than that of the first liner 31, ensuring that the airbag 20 can fully compress the liner 30 when it is inflated.

[0038] In this embodiment, the thickness of the second lining 32 is greater than the thickness of the first lining 31. Since the first lining 31 is closer to the inner part 11 of the outer jacket 10 than the second lining 32, and the airbag 20 will directly squeeze the second lining 32 when it is inflated, by making the thickness of the second lining 32 greater than the thickness of the first lining 31, it is possible not only to prevent the inner part 11 of the outer jacket 10 from having a hard foreign body sensation, which is beneficial to improving wearing comfort, but also to ensure that the lining 30 can pull the first area 111 of the inner part 11 in the direction away from the human face when the airbag 20 is inflated.

[0039] See Figure 1 , Figures 3 to 7 The bracket 40 is located between the outer portion 12 and the airbag 20. The bracket 40 can serve as a mounting carrier for functional components such as the air pump 50, solenoid valve 60, battery 70 and circuit board 80, and also as a support carrier for the airbag 20. When the airbag 20 inflates and compresses the bracket 40, the bracket 40 will generate a reaction force on the airbag 20, so that the airbag 20 can exert more compressive force on the inner portion 11 of the outer casing 10.

[0040] The support 40 includes a first part 41, a second part 42, and a first connecting part 43. The first part 41 and the second part 42 are arranged at intervals along the length of the massage eye mask. The first part 41 and the second part 42 are connected by the first connecting part 43, which is flexible and allows the first part 41 and the second part 42 to be bent relative to each other. This structural design not only meets the folding requirements of the massage eye mask, but also, because the first part 41 and the second part 42 are connected by the flexible first connecting part 43, it helps the massage eye mask to fit the face more closely when worn.

[0041] In this embodiment, the first connecting portion 43 is provided in the form of a flexible plastic sheet to increase the relative bending range of the first portion 41 and the second portion 42 during use. To improve the reliability of the bracket 40, the first portion 41, the second portion 42, and the first connecting portion 43 are connected by integral injection molding or by separate fixed connection (e.g., by ultrasonic welding).

[0042] The support 40 includes a plurality of support unit sections 44 spaced apart along the length of the massage eye mask. In this embodiment, the support unit sections 44 are made of plastic, and the support 40 includes four support unit sections 44. Of course, in other embodiments, the support unit sections 44 can be set to other required numbers as needed. The support unit section 44 has a mounting area 443, and functional components such as the air pump 50, solenoid valve 60, battery 70, and circuit board 80 can be mounted to the mounting area 443 of the corresponding support unit section 44 as needed.

[0043] The support unit 44 includes a matching base 441 and a housing 442, which are connected together. A mounting area 443 is formed between the base 441 and the housing 442. After the air pump 50, solenoid valve 60, battery 70, and circuit board 80 are installed, the housing 442 is assembled onto the base 441, thereby allowing the corresponding functional components to be securely housed within the mounting area 443. Preferably, the base 441 and housing 442 are detachably fixedly connected to facilitate the assembly and disassembly of the functional components during assembly or use.

[0044] Part of the support unit 44 is located in the first part 41, and part of the support unit 44 is located in the second part 42. That is, the first part 41 includes part of the support unit 44, and the second part 42 includes part of the support unit 44. Taking the support 40 as having four support unit 44 as an example, along the length of the massage eye mask, the four support unit 44 are support unit A, support unit B, support unit C, and support unit D in sequence. Among them, support unit A and support unit B are located in the first part 41, and support unit C and support unit D are located in the second part 42. Support unit B and support unit C are connected by a first connecting part 43.

[0045] The bracket 40 includes a second connecting portion 45 and a third connecting portion 46. Two adjacent bracket unit portions 44 located in the first portion 41 are connected by the second connecting portion 45, and two adjacent bracket unit portions 44 located in the second portion 42 are connected by the third connecting portion 46. Preferably, to improve the reliability of the bracket 40, the second connecting portion 45 is integrally injection molded to the corresponding bracket unit portion 44 or is fixedly connected separately (e.g., the two are ultrasonically welded); and / or, the third connecting portion 46 is integrally injection molded to the corresponding bracket unit portion 44 or is fixedly connected separately (e.g., the two are ultrasonically welded).

[0046] In this embodiment, along the length of the massage eye mask, the length of the first connecting part 43 is greater than the lengths of the second connecting part 45 and the third connecting part 46. By adopting such a structural design, it is beneficial to increase the relative bending amplitude between the first part 41 and the second part 42.

[0047] In this embodiment, to ensure the uniform distribution of the support units 40, the number of support unit portions 44 located in the first part 41 is the same as the number of support unit portions 44 located in the second part 42. Of course, in other embodiments, the number of support unit portions 44 located in the first part 41 and the number of support unit portions 44 located in the second part 42 can also be set differently as needed.

[0048] The second connecting portion 45 is flexible, and two adjacent support unit portions 44 located in the first portion 41 can be bent relative to each other through the second connecting portion 45; and / or, the third connecting portion 46 is flexible, and two adjacent support unit portions 44 located in the second portion 42 can be bent relative to each other through the third connecting portion 46.

[0049] By making the second connecting portion 45 and / or the third connecting portion 46 flexible, during use, the two adjacent support unit portions 44 located in the first portion 41 and / or the two adjacent support unit portions 44 located in the second portion 42 can be bent relative to each other, so that the support 40 has better flexibility, which not only helps to improve the operability of the massage eye mask during use, but also helps the massage eye mask to fit the human face better.

[0050] In this embodiment, the second connecting portion 45 is provided in a sheet-like form; and / or, the third connecting portion 46 is provided in a sheet-like form. Preferably, both the second connecting portion 45 and the third connecting portion 46 are flexible plastic sheets to increase the bending range during use.

[0051] In this embodiment, the second connecting portion 45 has a bent-formed protrusion A451 in its middle; and / or, the third connecting portion 46 has a bent-formed protrusion B461 in its middle. By providing the protrusions A451 and B461, the flexible bending effect between two adjacent support unit portions 44 located in the first portion 41 and / or between two adjacent support unit portions 44 located in the second portion 42 is improved.

[0052] See Figure 1 The flexible filling layer, as the flexible filling material of the massage eye mask, can effectively improve the wearing comfort of the massage eye mask. In this embodiment, the flexible filling layer includes a first flexible filling layer 121 and a second flexible filling layer 122. Both the first flexible filling layer 121 and the second flexible filling layer 122 are sponge pads. The first flexible filling layer 121 is filled between the inner portion 11 and the airbag 20, and the heating element 90 is located between the inner portion 11 and the first flexible filling layer 121. The second flexible filling layer 122 is filled between the outer portion 12 and the support 40.

[0053] In this embodiment, in order to improve the flexible covering effect of the second flexible filling layer 122 on the support 40, the second flexible filling layer 122 has a groove 1221 that corresponds one-to-one with the support unit part 44 along the length direction of the massage eye mask. When assembled, each support unit part 44 is accommodated in the corresponding groove 1221.

[0054] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A massage eye mask, the massage eye mask comprising: An overcoat, the overcoat including an inner portion and an outer portion, the inner portion being configured to face the human face when in use, the overcoat having a receiving space located between the inner portion and the outer portion; An airbag is disposed within the accommodating space, and when the airbag is inflated, it can compress the inner portion; The massage eye mask is characterized in that it further includes: A liner, wherein the liner is disposed within the accommodating space; The inner portion includes a first region corresponding to the human eyeball region, the liner is fixedly connected to the first region, and the airbag is located between the inner portion and the liner; When the airbag inflates, it can compress the liner, causing the liner to exert a pulling force on the first area in a direction away from the human face.

2. The massage eye mask according to claim 1, characterized in that: The first region extends along the length of the massage eye mask and is configured to cover both eyeballs of the human body when in use. The liner is a sheet extending along the length of the massage eye mask and is adapted to fit the first region along the length of the massage eye mask.

3. A massage eye mask according to claim 1, characterized in that: The inner portion includes a second region corresponding to the human eye periorbital region, and the first region is recessed toward the outer portion relative to the second region.

4. A massage eye mask according to claim 1, characterized in that: The outer garment is a flexible outer garment.

5. A massage eye mask according to claim 4, characterized in that: The liner is a flexible liner.

6. A massage eye mask according to claim 5, characterized in that: The liner is a flexible plastic sheet.

7. A massage eye mask according to claim 5 or 6, characterized in that: The liner includes a first liner and a second liner stacked on top of each other, the area of ​​the second liner being larger than the area of ​​the first liner, the first liner being located between the inner portion and the second liner, the first liner being fixedly connected to the first region, the second liner being fixedly connected to the first liner, and the airbag being located between the inner portion and the second liner.

8. A massage eye mask according to claim 7, characterized in that: The thickness of the second liner is greater than the thickness of the first liner.

9. A massage eye mask according to claim 1, 4, 5, or 6, characterized in that: The massage eye mask includes a support frame disposed within the accommodating space, and the support frame is located between the outer portion and the airbag; the support frame includes a first portion, a second portion, and a first connecting portion, the first portion and the second portion being arranged at intervals along the length direction of the massage eye mask, the first portion and the second portion being connected through the first connecting portion, the first connecting portion being flexible, and the first portion and the second portion being able to bend relative to each other through the first connecting portion; The massage eye mask includes an air pump, a solenoid valve, a battery, and a circuit board. The air pump, the solenoid valve, the battery, and a portion of the circuit board are installed in the first part, and the air pump, the solenoid valve, the battery, and a portion of the circuit board are installed in the second part. The air pump, the solenoid valve, and the battery are electrically connected to the circuit board, and the air pump, the solenoid valve, and the airbag are connected in sequence through pipes.

10. A massage eye mask according to claim 9, characterized in that: The support includes a plurality of support unit parts, some of which are located in the first part and some of which are located in the second part. The support includes a second connecting part and a third connecting part. Two adjacent support unit parts located in the first part are connected by the second connecting part, and two adjacent support unit parts located in the second part are connected by the third connecting part. The second connecting portion is flexible, allowing two adjacent support unit portions located in the first portion to bend relative to each other via the second connecting portion; and / or, the third connecting portion is flexible, allowing two adjacent support unit portions located in the second portion to bend relative to each other via the third connecting portion.

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