CN221600379U - Physiotherapy cushion - Google Patents

Abstract

The application discloses a physiotherapy pad, which comprises a physiotherapy pad body, wherein the physiotherapy pad body comprises: the device comprises an excitation layer, a thermal therapy layer and a vibration module, wherein the excitation layer comprises a first napping cloth, a far infrared material and a second napping cloth; the thermal therapy layer is arranged below the excitation layer and comprises a non-woven fabric and a heating wire, the heating wire is formed with avoidance holes, and the avoidance holes are correspondingly arranged in the avoidance holes; the vibration module comprises a plurality of vibration boxes, the vibration boxes comprise an upper cover, a motor, a middle cover and a lower cover which are sequentially arranged from top to bottom, the bottom of the middle cover is provided with a mounting hole, a clamping column is correspondingly arranged on the upper portion of the lower cover, the size of the mounting hole is smaller than the upper portion of Yu Kazhu, the size of the mounting hole is larger than the lower portion of the clamping column, the upper cover, the motor and the middle cover are correspondingly arranged above the non-woven fabric in an avoidance position, the lower cover is arranged below the non-woven fabric, and the clamping column penetrates through the avoidance Kong Juka and is connected to the mounting hole. The physical therapy pad has reasonable integral structural design layout, and a plurality of physical therapy functions interact, so that the health care effect is improved.

Description

Physiotherapy cushion

Technical Field

The application relates to the field of medical care, in particular to a physiotherapy pad.

Background

In the related art, most people can sit for a long time and then the shoulder, neck, waist and back ache is caused by the reason of going to school or working, so the treatment and relief are gradually promoted in the market through a physical therapy mode. Physical therapy refers to treatment with physical factors including sound, light, cold, heat, electricity, force (movement and pressure), etc., and non-invasive, non-medicinal treatment is used to restore the original physiological function of the body to the local or systemic dysfunction or lesions of the body. Therefore, how to combine the combined action of multiple physical factors to achieve the effect of physiotherapy and health care is the aim of continuous pursuit and improvement in the current medical and health care industry.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the physiotherapy pad provided by the utility model has triple physiotherapy effects of thermotherapy, far infrared and anion radiotherapy and vibration massage, and is reasonable in overall structural design layout, and multiple physiotherapy functions interact to improve the efficacy of health care.

According to the physiotherapy pad of the embodiment of the first aspect of the utility model, the physiotherapy pad comprises a physiotherapy pad body, and the physiotherapy pad body comprises: the device comprises an excitation layer, a thermal therapy layer and a vibration module, wherein the excitation layer comprises a first napping cloth, a far infrared material and a second napping cloth, and the far infrared material is accommodated between the first napping cloth and the second napping cloth and is used for radiating far infrared rays; the thermal therapy layer is arranged below the excitation layer and comprises a non-woven fabric and a heating wire, the heating wire is bent and wound on a plane and fixed on the non-woven fabric, the heating wire is formed with avoidance holes, and the non-woven fabric is provided with corresponding avoidance holes; the vibration module comprises a plurality of vibration boxes, the vibration boxes comprise an upper cover, a motor, a middle cover and a lower cover which are sequentially arranged from top to bottom, the motor is accommodated between the upper cover and the middle cover, a mounting hole is formed in the bottom of the middle cover, a clamping column is correspondingly arranged on the upper portion of the lower cover, the size of the mounting hole is smaller than Yu Kazhu, the size of the mounting hole is larger than that of the lower portion of the clamping column, the upper cover, the motor and the middle cover are correspondingly arranged above the non-woven fabric in an avoidance mode, the lower cover is arranged below the non-woven fabric, and the clamping column penetrates through the avoidance Kong Juka and is connected with the mounting hole so that the non-woven fabric is clamped between the middle cover and the lower cover.

The physiotherapy pad provided by the embodiment of the utility model has at least the following beneficial effects: the physiotherapy pad comprises a physiotherapy pad body, wherein the physiotherapy pad body comprises: the device comprises an excitation layer, a thermal therapy layer and a vibration module, wherein the excitation layer comprises a first napping layer, a second napping layer and a far infrared material positioned between the first napping layer and the second napping layer, and the far infrared material can perform physical therapy by radiating far infrared rays; the thermal therapy layer positioned below the excitation layer can be used for physical therapy in a mode of generating heat by the heating wire; meanwhile, a avoidance position is arranged in a plane formed after the heating wire is bent and wound, the non-woven fabric fixed by the heating wire is provided with an avoidance hole corresponding to the avoidance position, the vibration box of the vibration module is correspondingly arranged at the avoidance position, so that the high-temperature damage of the heat treatment layer to the vibration module is prevented, the vibration box comprises an upper cover, a middle cover and a lower cover which are arranged from top to bottom, a motor is accommodated between the upper cover and the middle cover, the upper end of the lower cover is provided with a clamping column, the lower end of the middle cover is correspondingly provided with a mounting hole, the middle cover and the lower cover are respectively positioned above and below the non-woven fabric, and the clamping column of the lower cover is penetrated through the avoidance hole and is exposed out of the upper end face of the non-woven fabric; therefore, the physiotherapy pad has triple physiotherapy effects of thermotherapy, far infrared ray and anion radiotherapy and vibration massage, and has reasonable overall structural design layout and interaction of various physiotherapy functions.

According to some embodiments of the utility model, the mounting holes and the clamping columns are provided with a plurality of groups and are arranged in a one-to-one correspondence manner, the lower cover is provided with a plurality of protrusions positioned between the adjacent clamping columns, and the heights and the sizes of the protrusions are all small Yu Kazhu.

According to some embodiments of the utility model, the upper end of the middle cover is provided with an elastic clamping hook, and the upper cover is correspondingly provided with a clamping groove, and the elastic clamping hook is clamped in the clamping groove.

According to some embodiments of the utility model, the vibration box further comprises a ceramic capacitor, wherein the ceramic capacitor is electrically connected to two ends of the motor and is located between the upper cover and the middle cover.

According to some embodiments of the utility model, the vibration box further comprises an EVA gasket, and the EVA gasket is wrapped outside the motor.

According to some embodiments of the utility model, a plurality of rectangular accommodating cavities are sewn between the first napped cloth and the second napped cloth, and the far infrared materials are uniformly distributed in the plurality of rectangular accommodating cavities.

According to some embodiments of the utility model, the physiotherapy pad further comprises a controller module, wherein the controller module is detachably and electrically connected with the physiotherapy pad body.

According to some embodiments of the utility model, the controller module comprises a controller and a first plug-in part, the physiotherapy pad body is correspondingly provided with a second plug-in part, the second plug-in part is detachably connected with the first plug-in part, the heating wire and the motor are respectively and electrically connected with the second plug-in part through wires, and the heating wire, the motor, the wires and the second plug-in part are all coated with a rubber coating layer.

According to some embodiments of the utility model, the physiotherapy pad body further comprises a bagging, wherein the bagging comprises a first velvet material and a second velvet material which are distributed up and down, and the excitation layer, the thermal therapy layer and the vibration module are located between the first velvet material and the second velvet material.

According to some embodiments of the utility model, the thermal therapeutic layer further comprises a non-woven fabric, wherein the non-woven fabric is positioned between the non-woven fabric and the lower cover, and the non-woven fabric has the same structure as the non-woven fabric.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of the overall structure of one embodiment of a physical therapy pad of the present utility model;

FIG. 2 is an exploded view of the therapy pad shown in FIG. 1;

FIG. 3 is an exploded view of the vibration pod in the therapy pad shown in FIG. 1;

fig. 4 is an exploded view of the excitation layer in the therapy pad shown in fig. 1.

Reference numerals:

A physio-pad body 100; a second plug-in portion 110; a controller module 200; a controller 210; a first mating portion 220; an excitation layer 300; a first napping cloth 310; a rectangular accommodating chamber 311; a far infrared material 320; a second napping cloth 330; a thermal therapeutic layer 400; a heating wire 410; avoidance bit 411; a nonwoven fabric 420; a relief hole 421; a nonwoven fabric 430; a vibration module 500; an upper cover 510; a card slot 511; a motor 520; a middle cover 530; a mounting hole 531; an elastic hook 532; a lower cover 540; a card column 541; projections 542; tile capacitor 550; EVA gasket 560; a sleeve 600; a first fleece 610; and a second fleece 620.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In the description of the present application, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The following describes a physiotherapy pad according to an embodiment of the present utility model with reference to fig. 1 to 4.

As shown in fig. 1 to 3, the physiotherapy pad according to the embodiment of the utility model includes a physiotherapy pad body 100, and the physiotherapy pad body 100 includes: the excitation layer 300, the thermal therapy layer 400 and the vibration module 500, the excitation layer 300 comprises a first napping cloth 310, a far infrared material 320 and a second napping cloth 330, wherein the far infrared material 320 is accommodated between the first napping cloth 310 and the second napping cloth 330 and is used for radiating far infrared rays; the thermal therapy layer 400 is arranged below the excitation layer 300 and comprises a non-woven fabric 420 and a heating wire 410, the heating wire 410 is bent and wound on a plane, the heating wire 410 is fixed on the non-woven fabric 420, the heating wire 410 is provided with an avoidance position 411, the non-woven fabric 420 is provided with an avoidance hole 421, and the avoidance hole 421 is arranged corresponding to the avoidance position 411; the vibration module 500 comprises a plurality of vibration boxes, each vibration box comprises an upper cover 510, a motor 520, a middle cover 530 and a lower cover 540 which are sequentially arranged from top to bottom, the motor 520 is accommodated between the upper cover 510 and the middle cover 530, a mounting hole 531 is formed in the bottom of the middle cover 530, a clamping column 541 is correspondingly arranged on the upper portion of the lower cover 540, the size of the mounting hole 531 is small Yu Kazhu 541, the upper portion of the mounting hole is larger than that of the clamping column 541, the upper cover 510, the motor 520 and the middle cover 530 are correspondingly arranged above the non-woven fabric 420 without the aid of the clearance 411, the lower cover 540 is arranged below the non-woven fabric 420, and the clamping column 541 penetrates through the clearance hole 421 and is clamped in the mounting hole 531, so that the non-woven fabric 420 is clamped between the middle cover 530 and the lower cover 540.

It will be appreciated that the physiotherapy pad includes a physiotherapy pad body 100, and the physiotherapy pad body 100 includes: the device comprises an excitation layer 300, a thermal therapy layer 400 and a vibration module 500, wherein the excitation layer 300 comprises a first napping layer, a second napping layer and a far infrared material 320 positioned between the first napping layer and the second napping layer, and the far infrared material 320 can perform physiotherapy by radiating far infrared rays; the thermal therapeutic layer 400 positioned under the excitation layer 300 can be used for physical therapy by generating heat through the heating wires 410; meanwhile, a avoidance position 411 is arranged in a plane formed after the heating wire 410 is bent and wound, the non-woven fabric 420 fixed by the heating wire 410 is correspondingly provided with a avoidance hole 421, the vibration box of the vibration module 500 is correspondingly arranged at the position of the avoidance position 411, so that the high-temperature damage of the thermal therapy layer 400 to the vibration module 500 is prevented, the vibration box comprises an upper cover 510, a middle cover 530 and a lower cover 540 which are arranged from top to bottom, a motor 520 is accommodated between the upper cover 510 and the middle cover 530, a clamping column 541 is arranged at the upper end of the lower cover 540, a mounting hole 531 is correspondingly arranged at the lower end of the middle cover 530, the middle cover 530 and the lower cover 540 are respectively arranged above and below the non-woven fabric 420, the clamping column 541 of the lower cover 540 penetrates through the avoidance hole 421 and is exposed at the upper end face of the non-woven fabric 420, and the mounting hole 531 is larger than the lower part Yu Kazhu and smaller than the upper part Yu Kazhu 541, so that the clamping column 541 and the mounting hole 531 of the middle cover 530 are pressed on the clamping column 541 of the lower cover 540 in a pressing mode, and the clamping column 541 and the mounting hole 531 are clamped and the mounting hole 531 are connected, and the clamping connection is realized between the middle cover 530 and the lower cover 540 and the non-woven fabric 420, and the lower cover 540 are clamped simultaneously; therefore, the physiotherapy pad has triple physiotherapy effects of thermotherapy, far infrared ray and anion radiotherapy and vibration massage, and has reasonable overall structural design layout and interaction of various physiotherapy functions.

Wherein, the heating wire 410 may be sewn on the non-woven fabric 420 through the existing embroidery machine equipment, thereby achieving the fixation of the heating wire 410. In addition, the napped cloth material improves softness, comfort and warmth retention, and improves the skin softness of a user.

It can be understood that the mounting holes 531 and the card columns 541 are provided with a plurality of groups and are arranged in a one-to-one correspondence, the lower cover 540 is provided with a plurality of protrusions 542 located between the adjacent card columns 541, and the heights and the sizes of the protrusions 542 are all small Yu Kazhu 541. For example, as shown in fig. 3, in the present embodiment, the middle cover 530 is provided with a plurality of mounting holes 531, the lower cover 540 is correspondingly provided with a plurality of clamping columns 541, so as to improve the fastening of the mounting of the middle cover 530 and the lower cover 540, and in addition, the lower cover 540 is provided with a plurality of protrusions 542, the plurality of protrusions 542 are positioned between the adjacent clamping columns 541, and the height dimensions of the protrusions 542 are all small Yu Kazhu 541, so as to improve the friction resistance when clamping the non-woven fabric 420, thereby improving the stability of the attachment of the vibration module 500 to the non-woven fabric 420.

It can be understood that the upper end of the middle cover 530 is provided with an elastic hook 532, and the upper cover 510 is correspondingly provided with a clamping groove 511, wherein the elastic hook 532 is clamped in the clamping groove 511. For example, as shown in fig. 3, in the present embodiment, an elastic hook 532 is disposed on the middle cover 530, and a clamping groove 511 is disposed on the upper cover 510 corresponding to the elastic hook 532, and the upper cover 510 and the lower cover 540 can be fixedly connected by the arrangement of the elastic hook 532 and the clamping groove 511 that are mutually adapted, so as to achieve the accommodating of the motor 520.

It will be appreciated that the vibration box further includes a ceramic capacitor 550, and the ceramic capacitor 550 is electrically connected to two ends of the motor 520 and is located between the upper cover 510 and the middle cover 530. For example, as shown in fig. 3, in this embodiment, the two ends of the motor 520 are electrically connected to the ceramic chip capacitor 550, so as to achieve the effects of noise elimination and interference resistance.

It is understood that the vibration box further comprises an EVA pad 560, and the EVA pad 560 is wrapped outside the motor. For example, as shown in fig. 3, in this embodiment, an EVA gasket 560 is further disposed in the vibration box, where the EVA gasket 560 is wrapped outside the motor, that is, is padded between the motor 520 and the upper cover, and the middle cover, so as to achieve the damping effect, further improve the impact resistance of the product, prolong the service life, and reduce the damage risk caused by impact.

It can be understood that a plurality of rectangular accommodating cavities 311 are sewn between the first and second tarpaulins 310 and 330, and the far infrared material 320 is uniformly distributed in the plurality of rectangular accommodating cavities 311. For example, as shown in fig. 4, in this embodiment, by sewing the first napping cloth 310 and the second napping cloth 330 together, a plurality of lines are formed by crossing each other in an array, so that a plurality of rectangular accommodating cavities 311 are formed between the first napping cloth 310 and the second napping cloth 330, and far infrared materials 320 are uniformly distributed in the rectangular accommodating cavities 311, far infrared rays released from the upper surface of the first napping cloth 310 are more uniform, and anions released from the upper surface of the first napping cloth are also more uniform.

Specifically, the far infrared material 320 may be granulated.

It is understood that the controller module 200 is further included, and the controller module 200 is detachably and electrically connected with the therapy pad body 100. For example, as shown in fig. 1, in the present embodiment, the physiotherapy pad body 100 includes three different functional layers including an excitation layer 300, a thermal therapy layer 400 and a vibration module 500, and the physiotherapy pad further includes a controller module 200 detachably and electrically connected to the physiotherapy pad body 100, where the controller module 200 can control the on/off of the different functional layers of the physiotherapy pad body 100, so as to control the use of one or more of the functional layers.

It can be understood that the controller module 200 includes a controller 210 and a first plugging portion 220, the physiotherapy pad body 100 is correspondingly provided with a second plugging portion 110, the second plugging portion 110 is detachably connected with the first plugging portion 220, the heating wire 410 and the motor 520 are respectively electrically connected with the second plugging portion 110 through wires, and the heating wire 410, the motor 520, the wires and the second plugging portion 110 are all coated with a glue coating layer. For example, as shown in fig. 1, in the present embodiment, the physical therapy pad body 100 and the controller module 200 are detachably coupled by the first coupling part 220 and the second coupling part 110, and when detached, the heating wire 410, the motor 520, the conductive wire, and the second coupling part 110 are provided with the glue coating layer, thereby realizing the waterproof effect of the physical therapy pad body 100, so that the physical therapy pad body 100 can be washed with water to keep clean.

It is understood that the physiotherapy pad body 100 further includes a pouch 600, and the pouch 600 includes a first fleece 610 and a second fleece 620 distributed up and down, and the excitation layer 300, the thermal therapy layer 400 and the vibration module 500 are located between the first fleece 610 and the second fleece 620. For example, as shown in fig. 1 to 2, in the present embodiment, the physiotherapy pad body 100 further includes a casing 600 formed by the first velvet material 610 and the second velvet material 620, and the excitation layer 300, the thermal therapy layer 400 and the vibration module 500 are all contained in the casing 600, and the first velvet material 610 and the second velvet material 620 are used as outer layers, so that not only the overall thermal insulation and skin friendliness can be improved, but also the abrupt feeling of the vibration module 500 can be reduced, thereby improving the softness of the whole physiotherapy pad.

Specifically, the first pile material 610 and the second pile material 620 are both short pile materials.

It is understood that the thermal therapeutic layer 400 further includes a non-woven fabric 430, the non-woven fabric 430 being positioned between the non-woven fabric 420 and the lower cover 540, the non-woven fabric 430 being identical in structure to the non-woven fabric 420. For example, as shown in fig. 1 to 2, in the present embodiment, the thermal therapeutic layer 400 further includes a non-woven fabric 430, and the non-woven fabric 430 is located at the bottom of the non-woven fabric 420 and has the same structural size as the non-woven fabric 420, that is, the non-woven fabric 430 is also provided with the dodging holes 421 and is clamped between the middle cover 530 and the lower cover 540 of the vibration box, and the thickness of the whole can be increased by one layer of non-woven fabric 420 and one layer of non-woven fabric 430, so as to improve the stability of fixing the vibration box.

It should be understood that the sizes of the pouch 600, the first and second tarpaulins 310 and 330, the non-woven fabric 420 and the non-woven fabric 430 are not greatly different, and the connection fixing is achieved by sewing the outer circumferences of the layers together.

The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application. Furthermore, embodiments of the application and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. The physiotherapy pad is characterized by comprising a physiotherapy pad body (100), wherein the physiotherapy pad body (100) comprises:

An excitation layer (300) comprising a first napping cloth (310), a far infrared material (320) and a second napping cloth (330), wherein the far infrared material (320) is accommodated between the first napping cloth (310) and the second napping cloth (330) and is used for radiating far infrared rays;

The thermal therapy layer (400) is arranged below the excitation layer (300) and comprises a non-woven fabric (420) and a heating wire (410), the heating wire (410) is bent and wound to form a plane, the heating wire (410) is fixed on the non-woven fabric (420), the heating wire (410) is formed with an avoidance position (411), the non-woven fabric (420) is provided with an avoidance hole (421), and the avoidance hole (421) is arranged corresponding to the avoidance position (411);

Vibration module (500), including a plurality of vibration boxes, vibration box is including upper cover (510), motor (520), well lid (530) and lower cover (540) that set gradually from top to bottom, motor (520) are held and are located upper cover (510) with between well lid (530), well lid (530) bottom is equipped with mounting hole (531), lower cover (540) upper portion correspondence is equipped with card post (541), the size of mounting hole (531) is less than the upper portion of card post (541), and is greater than the lower part of card post (541), upper cover (510), motor (520) with well lid (530) correspond dodge position (411) are located the top of non-woven fabrics (420), lower cover (540) are located non-woven fabrics (420) below, just card post (541) wear to locate hole (421) and joint in mounting hole (531), so that non-woven fabrics (420) clamp in between well lid (530) and the lower cover (540).

2. The physiotherapy pad according to claim 1, wherein the mounting hole (531) and the clamping columns (541) are provided with a plurality of groups and are arranged in a one-to-one correspondence manner, a plurality of protrusions (542) located between the adjacent clamping columns (541) are arranged on the lower cover (540), and the heights and the sizes of the protrusions (542) are smaller than those of the clamping columns (541).

3. The physiotherapy pad according to claim 2, wherein an elastic hook (532) is arranged at the upper end of the middle cover (530), a clamping groove (511) is correspondingly arranged on the upper cover (510), and the elastic hook (532) is clamped in the clamping groove (511).

4. The therapy pad of claim 1, wherein the vibration box further comprises a ceramic chip capacitor (550), the ceramic chip capacitor (550) is electrically connected to two ends of the motor (520) and is located between the upper cover (510) and the middle cover (530).

5. The physiotherapy pad of claim 1, wherein said vibration pod further comprises an EVA pad (560), said EVA pad (560) being wrapped around said motor (520).

6. The physiotherapy pad according to claim 1, characterized in that a plurality of rectangular accommodating cavities (311) are sewn between the first napped cloth (310) and the second napped cloth (330), and the far infrared material (320) is uniformly distributed in the plurality of rectangular accommodating cavities (311).

7. The therapy pad of claim 1, further comprising a controller module (200), the controller module (200) being removably electrically connected to the therapy pad body (100).

8. The physiotherapy pad according to claim 7, wherein the controller module (200) comprises a controller (210) and a first plugging portion (220), the physiotherapy pad body (100) is correspondingly provided with a second plugging portion (110), the second plugging portion (110) is detachably connected with the first plugging portion (220), the heating wire (410) and the motor (520) are respectively electrically connected with the second plugging portion (110) through wires, and the heating wire (410), the motor (520), the wires and the second plugging portion (110) are all coated with a rubber coating layer.

9. The therapy pad according to claim 1, wherein the therapy pad body (100) further comprises a pocket (600), the pocket (600) comprises a first fleece (610) and a second fleece (620) distributed up and down, and the excitation layer (300), the thermal therapy layer (400) and the vibration module (500) are located between the first fleece (610) and the second fleece (620).

10. The therapy pad according to claim 1, wherein the thermal therapy layer (400) further comprises a nonwoven fabric (430), the nonwoven fabric (430) being located between the nonwoven fabric (420) and the lower cover (540), the nonwoven fabric (430) being of the same structure as the nonwoven fabric (420).