阅读说明：本技术 一种带足部穴位按摩的多功能轮椅 (Multifunctional wheelchair with foot acupoint massage function ) 是由 徐昕 马东梅 刘丽 潘黎明 殷宝月 陈晋市 张晗 于 2020-12-16 设计创作，主要内容包括：本发明涉及一种轮椅,具体是一种带足部穴位按摩的多功能轮椅,包括靠板和坐板,所述靠板和坐板转动连接,靠板和坐板之间的前后两侧分别安装有一个弧形伸缩杆,坐板的下侧安装固定有下箱体,下箱体的底部安装有减震行走组件,坐板远离靠板的一端下侧还铰接设有第二伸缩缸,第二伸缩缸的缸体通过第一伸缩缸与下箱体连接,第二伸缩缸的下端转动安装有脚踏板,脚踏板通过第三伸缩缸与第二伸缩缸的伸缩芯轴连接,脚踏板内两侧均安装有若干气动伸缩按摩滚珠,下箱体内还安装有用于控制若干气动伸缩按摩滚珠伸缩的气动伸缩控制组件。本发明方便对靠背进行倾角调节,减震效果好,提升使用者的舒适度,还具有足部穴位按摩功能,值得推广。(The invention relates to a wheelchair, in particular to a multifunctional wheelchair with foot acupoint massage, which comprises a backup plate and a seat plate, wherein the backup plate is rotatably connected with the seat plate, the front side and the rear side between the backup plate and the seat plate are respectively provided with an arc-shaped telescopic rod, the lower side of the seat plate is fixedly provided with a lower box body, the bottom of the lower box body is provided with a damping walking assembly, the lower side of one end, far away from the backup plate, of the seat plate is further hinged with a second telescopic cylinder, the cylinder body of the second telescopic cylinder is connected with the lower box body through the first telescopic cylinder, the lower end of the second telescopic cylinder is rotatably provided with a pedal plate, the pedal plate is connected with a telescopic mandrel of the second telescopic cylinder through a third telescopic cylinder, a plurality of pneumatic telescopic massage balls are respectively arranged on two sides in the pedal plate, and a pneumatic telescopic control assembly for controlling the plurality of pneumatic telescopic. The invention is convenient to adjust the inclination angle of the backrest, has good damping effect, improves the comfort level of a user, has the function of massaging foot acupuncture points, and is worthy of popularization.)

1. The utility model provides a take multi-functional wheelchair of foot acupuncture point massage, includes backup plate (2) and seat (6), its characterized in that:

the backrest plate (2) is rotatably connected with the seat plate (6), the front side and the rear side between the backrest plate (2) and the seat plate (6) are respectively provided with an arc-shaped telescopic rod (3), and the arc-shaped telescopic rods (3) are used for controlling and adjusting the angle between the backrest plate (2) and the seat plate (6);

a lower box body (7) is fixedly arranged on the lower side of the seat plate (6), a damping walking assembly is arranged at the bottom of the lower box body (7), a second telescopic cylinder (9) is further hinged to the lower side of one end, far away from the backup plate (2), of the seat plate (6), the cylinder body of the second telescopic cylinder (9) is connected with the lower box body (7) through a first telescopic cylinder (8), a pedal plate (10) is rotatably arranged at the lower end of the second telescopic cylinder (9), and the pedal plate (10) is connected with a telescopic core shaft of the second telescopic cylinder (9) through a third telescopic cylinder (11);

a plurality of pneumatic telescopic massage balls (27) are arranged on both sides in the pedal (10); and a pneumatic telescopic control assembly for controlling the plurality of pneumatic telescopic massage balls (27) to stretch is further arranged in the lower box body (7).

2. The multifunctional wheelchair with the foot acupoint massage function as claimed in claim 1, wherein the arc-shaped telescopic rod (3) is of an arc-shaped structure, and an adjusting knob (4) for locking the arc-shaped telescopic rod (3) after the length of the arc-shaped telescopic rod is adjusted is further arranged on the arc-shaped telescopic rod (3); the circle center of the arc-shaped telescopic rod (3) is positioned on the central axis of the hinged shaft between the backup plate (2) and the seat plate (6).

3. The multifunctional wheelchair with foot acupoint massage function according to claim 1, wherein a push handle (1) is further arranged at one end of the lower box body (7) close to the backup plate (2).

4. The multifunctional wheelchair with foot acupoint massage function of any one of claims 1 to 3, wherein the shock-absorbing walking components comprise wheel shafts (13), walking wheels (14), supporting legs (15), shock-absorbing springs (16) and a middle vertical plate (17);

the left end and the right end of the bottom of the lower box body (7) are respectively hinged with a supporting leg (15), the lower end of each supporting leg (15) is fixedly provided with a wheel shaft (13), and two ends of each wheel shaft (13) are respectively rotatably provided with a travelling wheel (14);

a middle vertical plate (17) is further installed in the middle of the bottom of the lower box body (7), and two sides of the middle vertical plate (17) are respectively provided with a damping spring (16) connected with the supporting legs (15).

5. The multifunctional wheelchair with foot acupoint massage function according to claim 4, wherein the wheel axle (13) and the support legs (15) are vertically arranged, and the joint of the wheel axle (13) and the support legs (15) is located at the middle position of the wheel axle (13).

6. The multifunctional wheelchair with foot acupoint massage function as claimed in claim 1, wherein the upper end of the second telescopic cylinder (9) is hinged with the seat plate (6);

one end of the first telescopic cylinder (8) is hinged to the lower box body (7), and the other end of the first telescopic cylinder (8) is hinged to the cylinder body of the second telescopic cylinder (9);

one end of the third telescopic cylinder (11) is hinged to a telescopic mandrel of the second telescopic cylinder (9), and the other end of the third telescopic cylinder (11) is hinged to the top of the left end of the pedal (10).

7. The multifunctional wheelchair with foot acupoint massage function as claimed in claim 6, wherein a U-shaped frame is fixedly installed at the lower end of the telescopic mandrel of the second telescopic cylinder (9), and two branches of the U-shaped frame are respectively and rotatably connected with the middle parts of the front side and the rear side of the pedal (10);

the pneumatic telescopic massage ball bearing structure is characterized in that a groove (26) is formed in the top of the pedal plate (10), the pneumatic telescopic massage ball bearings (27) are installed in the groove (26) of the pedal plate (10), and the pneumatic telescopic massage ball bearings (27) are arranged in a matrix mode.

8. The multifunctional wheelchair with foot acupoint massage function according to claim 1 or 7, wherein the pneumatic telescopic control assembly comprises a connecting rod (21), a piston (22), an air pipe (12), a motor support (23), a rotating disc (24) and a rotating motor (25);

a driving cavity (19) is formed in the middle of the inner part of the lower box body (7), a pneumatic cavity (20) is formed in the right side of the driving cavity (19), and the driving cavity (19) is communicated with the pneumatic cavity (20);

a motor support (23) is installed in the driving cavity (19), a rotating motor (25) is installed and fixed on the motor support (23), a rotating disc (24) is installed and fixed on an output shaft of the rotating motor (25), a connecting rod (21) is rotatably connected to the outer ring of the rotating disc (24), the other end of the connecting rod (21) is rotatably connected with a piston (22), and the piston (22) is arranged in the pneumatic cavity (20) in a matched sliding mode;

one end of the air pipe (12) is communicated with the right end of the pneumatic cavity (20), and the other end of the air pipe (12) is communicated with the inner cavity of the pedal plate (10);

the pneumatic telescopic massage balls (27) are communicated with the inner cavity of the pedal (10), and the air pipes (12) are used for conveying air or pumping air out of the inner cavity of the pedal (10), so that the pneumatic telescopic massage balls (27) can be controlled to move in a telescopic mode.

9. The multifunctional wheelchair with foot acupoint massage function of claim 8, wherein an infrared lamp (28) is further installed in the middle of the top of the pedal plate (10).

10. The multifunctional wheelchair with foot acupoint massage function as claimed in claim 8, wherein the left side of the lower case (7) is further provided with a storage chamber (18), and the storage chamber (18) is provided with a storage drawer (5).

Technical Field

The invention relates to a wheelchair, in particular to a multifunctional wheelchair with foot acupoint massage function.

Background

Wheelchairs are chairs equipped with wheels to help replace walking and are classified into electric and manual folding wheelchairs. The wheelchair not only meets the requirements of physical disabilities and mobility-handicapped people for riding instead of walking, but also is more important to facilitate the family members to move and take care of the patients, so that the patients can do physical exercises and participate in social activities by means of the wheelchair.

The existing wheelchair is inconvenient to adjust the inclination angle of the backrest, poor in damping effect and capable of influencing the comfort level of a user, and the existing wheelchair is single in function, does not have a foot acupoint massage function and is limited. Therefore, in view of the above situation, there is an urgent need to develop a multifunctional wheelchair with foot acupoint massage function to overcome the shortcomings of the current practical application.

Disclosure of Invention

The embodiment of the invention aims to provide a multifunctional wheelchair with foot acupoint massage function, so as to solve the problems in the background technology.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

a multifunctional wheelchair with foot acupoint massage function comprises a back plate and a seat plate, wherein the back plate is rotatably connected with the seat plate, the front side and the rear side between the back plate and the seat plate are respectively provided with an arc-shaped telescopic rod, and the arc-shaped telescopic rods are used for controlling and adjusting the angle between the back plate and the seat plate; the utility model discloses a pneumatic telescopic massage device, including seat, backup plate, pneumatic telescopic massage ball, running gear, pedal, backup plate, the downside of seat, the downside installation of seat is fixed with lower box, the shock attenuation running assembly is installed to the bottom of box down, the seat is kept away from the one end downside of backup plate and is still articulated to be equipped with the second telescoping cylinder, and the cylinder body of second telescoping cylinder passes through first telescoping cylinder and lower box connection, and the running-board is installed in the lower extreme rotation of second telescoping cylinder, and the running-board passes through the telescopic dabber of third telescoping cylinder and second telescoping cylinder to be connected, a plurality of pneumatic telescopic massage ball are all installed to both sides in the running-board, still install the flexible pneumatic telescopic.

As a further scheme of the invention: the arc-shaped telescopic rod is of an arc-shaped structure, an adjusting knob used for locking the arc-shaped telescopic rod after the length of the arc-shaped telescopic rod is adjusted is further arranged on the arc-shaped telescopic rod, and the circle center of the arc-shaped telescopic rod is located on the central axis of the hinge shaft between the backup plate and the seat plate.

As a further scheme of the invention: and a pushing handle is further arranged at one end, close to the backup plate, of the lower box body.

As a further scheme of the invention: the shock absorption walking assembly comprises a wheel shaft, walking wheels, supporting legs, a shock absorption spring and a middle vertical plate, wherein the left end and the right end of the bottom of the lower box body are respectively hinged with one supporting leg, the lower end of each supporting leg is fixedly provided with the wheel shaft, and the two ends of the wheel shaft are respectively rotatably provided with one walking wheel; a middle vertical plate is further installed in the middle of the bottom of the lower box body, and two sides of the middle vertical plate are respectively provided with a damping spring connected with the supporting legs.

As a further scheme of the invention: the wheel shaft and the supporting legs are vertically arranged, and the joint of the wheel shaft and the supporting legs is positioned in the middle of the wheel shaft.

As a further scheme of the invention: the upper end of the cylinder body of the second telescopic cylinder is hinged with the seat plate, one end of the first telescopic cylinder is hinged to the lower box body, the other end of the first telescopic cylinder is hinged to the cylinder body of the second telescopic cylinder, one end of the third telescopic cylinder is hinged to the telescopic mandrel of the second telescopic cylinder, and the other end of the third telescopic cylinder is hinged to the top of the left end of the pedal plate.

As a further scheme of the invention: a U-shaped frame is fixedly arranged at the lower end of a telescopic mandrel of the second telescopic cylinder, and two branches of the U-shaped frame are respectively and rotatably connected with the middle parts of the front side and the rear side of the pedal plate; the pneumatic telescopic massage ball bearing is arranged in the groove of the pedal plate and is arranged in a matrix.

As a further scheme of the invention: the pneumatic telescopic control component comprises a connecting rod, a piston, an air pipe, a motor support, a rotary table and a rotating motor, a driving cavity is arranged in the middle of the lower box body, a pneumatic cavity is arranged on the right side of the driving cavity, and the driving cavity and the pneumatic cavity are communicated, a motor support is arranged in the driving cavity, a rotating motor is fixedly arranged on the motor support, a turntable is fixedly arranged on an output shaft of the rotating motor, the outer ring of the turntable is rotatably connected with a connecting rod, the other end of the connecting rod is rotatably connected with a piston, the piston is arranged in the pneumatic cavity in a matched sliding manner, one end of the air pipe is communicated with the right end of the pneumatic cavity, the other end of the air pipe is communicated with the inner cavity of the pedal plate, a plurality of pneumatic telescopic massage balls are communicated with the inner cavity of the pedal plate, and the air pipe conveys air or pumps air out of the inner cavity of the pedal plate, so that the pneumatic telescopic massage balls can be controlled to move in a telescopic mode.

As a further scheme of the invention: an infrared lamp is further installed in the middle of the top of the pedal.

As a further scheme of the invention: the left side of the lower box body is also provided with a storage cavity, and a storage drawer is installed on the storage cavity in a matching mode.

Compared with the prior art, the embodiment of the invention has the beneficial effects that:

according to the multifunctional wheelchair with the foot acupoint massage function, the arc-shaped telescopic rod is arranged between the backup plate and the seat plate, so that the lateral limiting function can be provided through the arc-shaped telescopic rod, the length of the arc-shaped telescopic rod can be adjusted, and the inclination of the backup plate can be changed, so that the multifunctional wheelchair is suitable for more comfortable use of a user; the damping walking assembly arranged at the bottom of the lower box body is beneficial to more stable movement of the device, no bumping feeling is generated, and the comfort of a user is better; the pedal can be positioned at a proper angle and height through the matching arrangement of the second telescopic cylinder, the first telescopic cylinder and the third telescopic cylinder, and acupuncture points of the foot can be massaged through the pneumatic telescopic massage balls arranged in the pedal; in addition, through the pneumatic flexible control assembly of installation in the lower box, still can control a plurality of pneumatic flexible massage ball developments flexible, and then promote the acupuncture point massage effect of pneumatic flexible massage ball to the foot, be worth promoting.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic sectional structure view of a lower case portion in the embodiment of the present invention.

FIG. 3 is a perspective view of a portion of the footrest in accordance with an embodiment of the present invention.

Fig. 4 is a schematic perspective view of the backrest plate, the arc-shaped telescopic rod and the seat plate part in the embodiment of the invention.

Fig. 5 is a schematic top view of the axle and road wheel portion of an embodiment of the invention.

In the figure: 1-pushing handle, 2-backing plate, 3-arc telescopic rod, 4-adjusting knob, 5-storage drawer, 6-seat plate, 7-lower box body, 8-first telescopic cylinder, 9-second telescopic cylinder, 10-pedal plate, 11-third telescopic cylinder, 12-air pipe, 13-wheel shaft, 14-travelling wheel, 15-supporting leg, 16-damping spring, 17-middle vertical plate, 18-storage chamber, 19-driving chamber, 20-pneumatic chamber, 21-connecting rod, 22-piston, 23-motor support, 24-rotating disc, 25-rotating motor, 26-groove, 27-pneumatic telescopic massage ball and 28-infrared lamp.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

Example 1

Referring to fig. 1 to 5, in the embodiment of the invention, the multifunctional wheelchair with foot acupoint massage comprises a back plate 2 and a seat plate 6, wherein the back plate 2 is rotatably connected with the seat plate 6, an arc-shaped telescopic rod 3 is respectively arranged at the front side and the rear side between the back plate 2 and the seat plate 6, and the arc-shaped telescopic rod 3 is used for controlling and adjusting the angle between the back plate 2 and the seat plate 6 so as to adapt to more comfortable use of a user; the utility model discloses a pneumatic telescopic massage device, including seat 6, cushion, first telescoping cylinder 9, the telescopic dabber of second telescoping cylinder 9, a plurality of pneumatic telescopic massage ball 27 are all installed to both sides in the footboard 10, the pneumatic telescopic control subassembly that is used for controlling the flexible of a plurality of pneumatic telescopic massage ball 27 is still installed to the downside installation of seat 6 is fixed with lower box 7, the shock attenuation running gear is installed to the bottom of lower box 7, seat 6 keeps away from the one end downside of backup plate 2 and still articulates and is equipped with second telescoping cylinder 9, and the cylinder body of second telescoping cylinder 9 is connected with lower box 7 through first telescoping cylinder 8, and the lower extreme of second telescoping cylinder 9 is rotated and is installed running-board 10, and running-board 10 is connected with the flexible dabber of second telescoping cylinder 9 through.

In the embodiment of the invention, the arc-shaped telescopic rod 3 is arranged between the backup plate 2 and the seat plate 6, so that the arc-shaped telescopic rod 3 can provide a lateral limiting effect, the length of the arc-shaped telescopic rod 3 can be adjusted, and the inclination of the backup plate 2 can be changed, so that the seat is more comfortable to use by a user; the damping walking assembly arranged at the bottom of the lower box body 7 is beneficial to more stable movement of the device, no bumping feeling is generated, and the comfort of a user is better; the pedal plate 10 can be positioned at a proper angle and height through the matching arrangement of the second telescopic cylinder 9, the first telescopic cylinder 8 and the third telescopic cylinder 11, and acupuncture points of the foot can be massaged through the pneumatic telescopic massage ball 27 arranged in the pedal plate 10; in addition, through the pneumatic telescopic control assembly installed in the lower box body 7, the pneumatic telescopic massage balls 27 can be controlled to stretch dynamically, so that the acupuncture point massage effect of the pneumatic telescopic massage balls 27 on the feet is improved, and the foot massage device is worthy of popularization.

Example 2

Referring to fig. 1 to 5, the present embodiment is different from embodiment 1 in that:

in this embodiment, the arc-shaped telescopic rod 3 is of an arc-shaped structure, the arc-shaped telescopic rod 3 is further provided with an adjusting knob 4 for locking the arc-shaped telescopic rod 3 after the length of the arc-shaped telescopic rod is adjusted, and the circle center of the arc-shaped telescopic rod 3 is located on the central axis of the hinge shaft between the backup plate 2 and the seat plate 6, so that the application effect of the arc-shaped telescopic rod 3 is improved.

One end of the lower box body 7, which is close to the backup plate 2, is also provided with a push handle 1, and the device is conveniently pushed through the push handle 1.

As shown in fig. 1 and 5, the shock-absorbing walking assembly comprises a wheel shaft 13, walking wheels 14, supporting legs 15, a shock-absorbing spring 16 and a middle vertical plate 17, wherein the left end and the right end of the bottom of the lower box body 7 are respectively hinged with one supporting leg 15, the lower end of each supporting leg 15 is fixedly provided with the wheel shaft 13, the wheel shaft 13 and the supporting leg 15 are vertically arranged, the joint of the wheel shaft 13 and the supporting leg 15 is positioned in the middle of the wheel shaft 13, and the two ends of the wheel shaft 13 are respectively rotatably provided with one walking wheel 14; still install a well riser 17 in the middle of the bottom of lower box 7, the both sides of well riser 17 are equipped with a damping spring 16 of being connected with supporting leg 15 respectively, can support supporting leg 15 shock attenuation through damping spring 16, and through the structure setting of shaft 13 and walking wheel 14, do benefit to the nimble removal of device.

The upper end of a cylinder body of the second telescopic cylinder 9 is hinged with the seat plate 6, one end of the first telescopic cylinder 8 is hinged on the lower box body 7, the other end of the first telescopic cylinder 8 is hinged on the cylinder body of the second telescopic cylinder 9, one end of the third telescopic cylinder 11 is hinged on a telescopic mandrel of the second telescopic cylinder 9, the other end of the third telescopic cylinder 11 is hinged on the top of the left end of the pedal plate 10, the height of the pedal plate 10 can be controlled through the second telescopic cylinder 9, the distance between the second telescopic cylinder 9 and the lower box body 7 can be controlled through the first telescopic cylinder 8, the position of the pedal plate 10 is further controlled, and the inclination angle of the pedal plate 10 can be controlled through the third telescopic cylinder 11.

As shown in fig. 1 and 3, a U-shaped frame (not shown) is fixedly installed at the lower end of the telescopic mandrel of the second telescopic cylinder 9, two branches of the U-shaped frame are respectively rotatably connected with the middle parts of the front side and the rear side of the pedal plate 10, and the pedal plate 10 can be supported through the U-shaped frame; the top of the pedal plate 10 is provided with a groove 26, a certain limiting effect is achieved through the groove 26, the pneumatic telescopic massage balls 27 are arranged in the groove 26 of the pedal plate 10, and the pneumatic telescopic massage balls 27 are arranged in a matrix.

As shown in fig. 2, the pneumatic telescoping control assembly includes a connecting rod 21, a piston 22, an air tube 12, a motor support 23, a rotary table 24 and a rotary motor 25, a driving chamber 19 is formed in the middle of the lower box 7, a pneumatic chamber 20 is formed on the right side of the driving chamber 19, the driving chamber 19 is communicated with the pneumatic chamber 20, the motor support 23 is installed in the driving chamber 19, the rotary motor 25 is installed and fixed on the motor support 23, the rotary table 24 is installed and fixed on an output shaft of the rotary motor 25, the outer ring of the rotary table 24 is rotatably connected with the connecting rod 21, the other end of the connecting rod 21 is rotatably connected with the piston 22, the piston 22 is slidably arranged in the pneumatic chamber 20 in a matching manner, one end of the air tube 12 is communicated with the right end of the pneumatic chamber 20, the other end of the air tube 12 is communicated with the inner cavity of the pedal plate 10, and a, and the air pipe 12 is used for conveying air to or pumping air out of the inner cavity of the pedal 10, so that the pneumatic telescopic massage balls 27 can be controlled to move in a telescopic mode.

In this embodiment, the infrared lamp 28 is further installed in the middle of the top of the pedal 10, the infrared lamp 28 has a thermal osmosis effect, so that the effects of diminishing inflammation, easing pain, promoting blood circulation, removing blood stasis and the like can be remarkably achieved, and a certain curative effect can be improved by matching with acupoint massage of the pneumatic telescopic massage balls 27.

The left side of the lower box body 7 is also provided with a storage cavity 18, the storage cavity 18 is provided with a storage drawer 5 in a matching way, and the storage drawer 5 is used for storing related articles, so that the articles are used to the maximum, and the integral application effect is improved; a storage battery for supplying power to the rotating motor 25 and the infrared lamp 28 can be arranged in the storage drawer 5, so that the wheelchair device can be conveniently used outdoors.

In this embodiment, the rotating electrical machine 25 and the infrared lamp 28 are controlled by a PLC controller disclosed in the prior art, and the specific types and circuit connections of the PLC controller, the rotating electrical machine 25, and the infrared lamp 28 are not specifically limited, and can be flexibly set in actual application; the circuits, electronic components and modules involved are all prior art and may be implemented completely by those skilled in the art, without further elaboration, and the invention is not concerned with the improvement of software programs.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature. The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.