1. A back table for a vehicle seat capable of being in a folded stowed state substantially conforming to a back side of a vehicle seat body and an open state at a set included angle with the back side of the vehicle seat body, the back table comprising:

the desk plate comprises a desk plate body and a back desk plate body, wherein the desk plate body comprises a first plate body and a second plate body which are oppositely arranged to define a plate-shaped cavity, the first plate body is positioned above the second plate body when the back desk plate is in the open state, and the first plate body comprises at least one hollow area and at least one lampshade which is arranged in the at least one hollow area in a one-to-one correspondence mode; and

and the light emitting direction of the at least one light supplementing lamp panel corresponds to the at least one lampshade respectively.

2. The back table of claim 1,

the rear table includes: first and second opposing edges, and third and fourth opposing edges, wherein the first edge is adjacent to a back side of the vehicle seat body when the rear table is in the open state;

the at least one lampshade comprises a first spotlight shade adjacent to and extending in the same direction as the third edge and a second spotlight shade adjacent to and extending in the same direction as the fourth edge, and the first spotlight shade and the second spotlight shade are configured to reflect light rays towards the space between the first spotlight shade and the second spotlight shade;

the at least one light supplementing lamp panel comprises a first strip-shaped LED lamp panel and a second strip-shaped LED lamp panel, light emitting direction of the first strip-shaped LED lamp panel is towards the first spotlight cover, and light emitting direction of the second strip-shaped LED lamp panel is towards the second spotlight cover.

3. The back table of claim 2,

the first spotlight cover and the second spotlight cover both comprise cambered surface parts, and the concave surface of the cambered surface part of the first spotlight cover faces the concave surface of the cambered surface part of the second spotlight cover.

4. The back table of claim 1,

the rear desk plate further comprises a switch configured to control the on and off of the at least one supplementary lighting lamp panel; and/or

The at least one light supplementing lamp panel is configured to be automatically opened when the rear desk plate is in the opening state, and automatically closed when the rear desk plate is in the folding and accommodating state.

5. The back table as claimed in any one of claims 1 to 4, further comprising:

the light-transmitting end plate is arranged along at least one part of the edge of the rear desk plate and is fixedly arranged between the first plate body and the second plate body; and

and the light strip component is positioned in the plate-shaped cavity and arranged along at least one part of the edge, and light is emitted to the light-transmitting end plate.

6. The rear table of claim 5, wherein the light strip assembly comprises: a fixing piece, an LED lamp strip, a semitransparent piece and a brightening piece which are arranged in sequence along the direction close to the light-transmitting end plate, wherein,

the brightening piece is fixed on the light-transmitting end plate, and one side of the brightening piece, which is back to the light-transmitting end plate, is provided with a plurality of first clamping parts;

one side of the fixing piece facing the light-transmitting end plate is provided with a plurality of second clamping portions, and the second clamping portions can be clamped with the first clamping portions in a one-to-one correspondence mode so as to fix the LED lamp strip and the semitransparent piece between the fixing piece and the brightening piece.

7. The back table of claim 5,

the rear table includes: first and second opposing edges, and third and fourth opposing edges, wherein the first edge is adjacent to a back side of the vehicle seat body when the rear table is in the open state;

the light-transmitting end plate and the lamp strip component are arranged along the second edge.

8. The back table of claim 5,

the light strip assembly is configured to turn on or off simultaneously with an ambiance lighting system of a vehicle.

9. The back table of claim 5,

the orientation of the first plate body one side of the second plate body has a plurality of third block portions, the orientation of the second plate body one side of the first plate body have can with a plurality of fourth block portions of a plurality of third block portion one-to-one block, the first plate body with the second plate body is through a plurality of threaded fastener fixed connection.

10. The back table of claim 5,

one side of the light-transmitting end plate, which is close to the first plate body, is connected with a first positioning plate in an integrally bent mode, and one side of the light-transmitting end plate, which is close to the second plate body, is connected with a second positioning plate in an integrally bent mode;

the first positioning plate is provided with at least one first positioning hole, and each first positioning hole can be penetrated by a third clamping part; and/or the second positioning plate is provided with at least one second positioning hole, and each second positioning hole can be penetrated by one fourth clamping part.

11. A vehicle seat, comprising:

a vehicle seat body having a receiving groove and a latch at an edge of the receiving groove on a back side thereof; and

the rear table as claimed in any one of claims 1 to 10, provided on a back side of the vehicle seat body;

wherein the storage slot is configured to receive the rear table in a folded storage state, and the latch is configured to lock the rear table in the folded storage state.

Background

With the increasing pace of life in the modern times, the demands of people for making up, studying and working in vehicles are increasing, and for this reason, some vehicle seats are equipped with a rear table that can be opened and folded for storage. However, when the ambient light in the vehicle is insufficient, the visual fatigue is easily caused when the vehicle is used for learning or working, and the comfort level of the vehicle is reduced due to the dim environment in the vehicle, so that the travel feeling is boring.

The technical means described in this section are not necessarily the technical means that have been previously conceived or adopted. Unless otherwise indicated, it should not be assumed that any of the technical measures described in this section qualify as prior art merely by virtue of their inclusion in this section. Similarly, unless otherwise indicated, the problems mentioned in this section should not be considered as having been acknowledged in any prior art.

Disclosure of Invention

The present disclosure provides a rear table for a vehicle seat and a vehicle seat.

According to an aspect of the present disclosure, there is provided a back table for a vehicle seat, capable of being in a folded-in state of substantially fitting to a back side of a vehicle seat body, and an open state of a set angle to the back side of the vehicle seat body, the back table including: the desk plate comprises a desk plate body and a back desk plate body, wherein the desk plate body comprises a first plate body and a second plate body which are oppositely arranged to define a plate-shaped cavity, the first plate body is positioned above the second plate body when the back desk plate is in the open state, and the first plate body comprises at least one hollow area and at least one lampshade which is arranged in the at least one hollow area in a one-to-one correspondence mode; and at least one light supplementing lamp panel fixed in the plate-shaped cavity, wherein the emitted light of the at least one light supplementing lamp panel is emitted to correspond to the at least one lampshade respectively.

In some embodiments, the back table comprises: first and second opposing edges, and third and fourth opposing edges, wherein the first edge is adjacent to a back side of the vehicle seat body when the rear table is in the open state; the at least one lampshade comprises a first spotlight shade adjacent to and extending in the same direction as the third edge and a second spotlight shade adjacent to and extending in the same direction as the fourth edge, and the first spotlight shade and the second spotlight shade are configured to reflect light rays towards the space between the first spotlight shade and the second spotlight shade; the at least one light supplementing lamp panel comprises a first strip-shaped LED lamp panel and a second strip-shaped LED lamp panel, light emitting direction of the first strip-shaped LED lamp panel is towards the first spotlight cover, and light emitting direction of the second strip-shaped LED lamp panel is towards the second spotlight cover.

In some embodiments, the first spotlight cover and the second spotlight cover each include an arc portion, and a concave surface of the arc portion of the first spotlight cover faces a concave surface of the arc portion of the second spotlight cover.

In some embodiments, the rear desk panel further comprises a switch configured to control the at least one supplementary lighting lamp panel to be turned on and off; and/or, at least one light filling lamp plate configuration is in the back table is in automatic opening during the open mode, and is in the back table is in self-closing during the folding state of accomodating.

In some embodiments, the back table further comprises: the light-transmitting end plate is arranged along at least one part of the edge of the rear desk plate and is fixedly arranged between the first plate body and the second plate body; and the lamp strip component is positioned in the plate-shaped cavity and arranged along at least one part of the edge, and light is emitted to the light-transmitting end plate.

In some embodiments, the light strip assembly comprises: the LED lamp comprises a fixing piece, an LED lamp strip, a semitransparent piece and a brightening piece, wherein the fixing piece, the LED lamp strip, the semitransparent piece and the brightening piece are sequentially arranged in the direction close to the light-transmitting end plate, the brightening piece is fixed on the light-transmitting end plate, and a plurality of first clamping parts are arranged on one side of the brightening piece, which faces away from the light-transmitting end plate; one side of the fixing piece facing the light-transmitting end plate is provided with a plurality of second clamping portions, and the second clamping portions can be clamped with the first clamping portions in a one-to-one correspondence mode so as to fix the LED lamp strip and the semitransparent piece between the fixing piece and the brightening piece.

In some embodiments, the back table comprises: first and second opposing edges, and third and fourth opposing edges, wherein the first edge is adjacent to a back side of the vehicle seat body when the rear table is in the open state; the light-transmitting end plate and the lamp strip component are arranged along the second edge.

In some embodiments, the light strip assembly is configured to turn on or off simultaneously with the mood light system of the vehicle.

In some embodiments, a side of the first plate facing the second plate has a plurality of third engaging portions, a side of the second plate facing the first plate has a plurality of fourth engaging portions capable of engaging with the plurality of third engaging portions in a one-to-one correspondence, and the first plate and the second plate are fixedly connected by a plurality of threaded fasteners.

In some embodiments, one side of the light-transmitting end plate, which is close to the first plate body, is connected with a first positioning plate in an integrally bent manner, and one side of the light-transmitting end plate, which is close to the second plate body, is connected with a second positioning plate in an integrally bent manner; the first positioning plate is provided with at least one first positioning hole, and each first positioning hole can be penetrated by a third clamping part; and/or the second positioning plate is provided with at least one second positioning hole, and each second positioning hole can be penetrated by one fourth clamping part.

According to another aspect of the present disclosure, there is provided a vehicle seat including: a vehicle seat body having a receiving groove and a latch at an edge of the receiving groove on a back side thereof; the rear table plate is arranged on the back side of the vehicle seat body; wherein the storage slot is configured to receive the rear table in a folded storage state, and the latch is configured to lock the rear table in the folded storage state.

According to one or more embodiments of the present disclosure, the following technical effects can be obtained: when the car internal environment light is not enough, open the light filling lamp plate on the back table and be the car internal environment light filling, not only can satisfy the light demand of study, work, slow down asthenopia, can promote the sensation of riding by bus through building the interior light atmosphere of car in addition, improve the dry sensation of journey. Compare interior dome lamp, because light sets up the dorsal part at the seat, consequently, can also reduce the influence to driver's sight to promote the security of driving.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present disclosure, nor do they limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the embodiments and, together with the description, serve to explain the exemplary implementations of the embodiments. The illustrated embodiments are for purposes of illustration only and do not limit the scope of the claims. Throughout the drawings, identical reference numbers designate similar, but not necessarily identical, elements.

Fig. 1 illustrates a schematic view of a rear table applied to a vehicle seat according to some embodiments of the present disclosure;

fig. 2 illustrates an exploded view of a back table according to some embodiments of the present disclosure; and

fig. 3 illustrates a cross-sectional schematic view of a back table at a-a of fig. 1, according to some embodiments of the present disclosure.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments can be modified in various different ways, without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the related art, some vehicle seats are equipped with a rear table that can be unfolded and folded for storage. However, when the ambient light in the vehicle is insufficient, the visual fatigue is easily caused when the vehicle is used for learning or working in the process of riding. In addition, the comfort level of riding is also reduced by the dim environment in the vehicle, resulting in a dry travel experience.

Based on this, the embodiment of the disclosure provides a rear table plate for a vehicle seat and the vehicle seat, so as to meet the light demand in the vehicle and improve the riding experience. Vehicle seats include, but are not limited to, car seats, high-speed rail seats, aircraft seats, bus seats, and the like. When the vehicle seat is an automobile seat, the vehicle seat can be a main driving seat, and can also be a secondary driving seat or a rear seat.

As shown in fig. 1, 2 and 3, some embodiments of the present disclosure provide a rear table 150 for a vehicle seat 100, which can be in a folded storage state substantially conforming to a back side of a vehicle seat body 110, and an unfolded state (an unfolded state is a state shown in the figures) at a set angle to the back side of the vehicle seat body.

As shown in fig. 2 and 3, the rear table 150 includes: the table body 1500 includes a first plate 151 and a second plate 152 oppositely disposed to define a plate-shaped cavity 153; and at least one supplementary light lamp panel 155 fixed in the plate-shaped cavity 153. The first plate 151 is located above the second plate 152 when the rear table 150 is in an open state (i.e., the state shown in fig. 1). The first plate 151 includes at least one hollow area (located below the lamp shade 154, not shown by reference numerals in the drawings) and at least one lamp shade 154 disposed in the at least one hollow area in a one-to-one correspondence manner, and the emitted light of the at least one light supplement lamp panel 155 emits light toward the at least one lamp shade 154 respectively.

When the interior environment light of car is not enough, open the light filling lamp plate 155 on the back table 150 and be the interior environment light filling of car, not only can satisfy the light demand of study, work, slow down asthenopia, can promote the sensation of riding through building the interior light atmosphere of car in addition, improve the dry sensation of journey. Compare interior dome lamp, because light sets up the dorsal part at the seat, consequently, can also reduce the influence to driver's sight to promote the security of driving.

In some embodiments, the at least one light supplement lamp panel 155 is configured to be automatically turned on when the rear desk 150 is in the open state, and automatically turned off when the rear desk 150 is in the folded storage state, so that the light supplement function of the rear desk 150 is more intelligent, and the riding comfort can be further improved.

In addition, the rear desk board 150 may further include a switch (not shown) located on an outer surface of the first board 151 or an outer surface of the second board 152, and configured to control the at least one fill-in lamp panel 155 to be turned on or off. Like this, when back table 150 is in the open mode, the user can decide whether need to open light filling lamp plate 155 according to the interior light condition of car, and the using-way is more nimble. The switch is, for example, a touch switch or a mechanical button switch. In addition, the switch may be a wireless remote control switch that is structurally independent of the back table 150.

In some embodiments of the present disclosure, as shown in fig. 2 and 3, the back table 150 further comprises a light-transmissive end plate 157 disposed along at least a portion of an edge of the back table 150, and a light strip assembly disposed within the plate-shaped cavity 153 and also disposed along the at least a portion of the edge. The light-transmitting end plate 157 is fixedly disposed between the first board 151 and the second board 152, and light emitted from the light strip assembly is emitted to the light-transmitting end plate 157.

In this embodiment, the transparent end plate 157 is integrally bent and connected to a first positioning plate 1570a and integrally bent and connected to a second positioning plate 1570b, so that the cross-sectional shape is substantially U-shaped. The first positioning plate 1570a and the second positioning plate 1570b can realize the positioning and fixing of the light-transmitting end plate 157 between the first plate 151 and the second plate 152. In other embodiments of the present disclosure, the light-transmitting end plate may also be adhesively fixed between the first plate body and the second plate body, which is not specifically limited by the present disclosure.

The lamp area subassembly can be as the inside atmosphere lamp of vehicle, and atmosphere lighting system along with the vehicle opens or closes simultaneously. The atmosphere lighting system of the vehicle includes, for example, a dashboard atmosphere lamp, a center console atmosphere lamp, a ceiling atmosphere lamp, a door inside atmosphere lamp, and the like. Coming night, light is dark, and the atmosphere lamp makes profile become clear in the car, can dry by the fire the warm atmosphere, builds the interior condition of car and harmonizes science and technology aesthetic feeling to further promote the quality of vehicle and feel by bus.

As shown in fig. 1, the back side of the vehicle seat body 110 has a receiving groove 111 and a latch 112 at an edge of the receiving groove 111. The receiving groove 111 is configured to receive the rear table 150 in a folded receiving state, and the locker 112 is configured to lock the rear table 150 in the folded receiving state.

The specific type of latch 112 is not limited. For example, the rear table 150 may be locked in the folded and stored state by an elastic clip shown in the figure, which is engaged with a catch 1505 provided in the rear table 150. When the elastic clip is pressed, the elastic clip is disengaged from the engaging groove 1505, and the back desk 150 is released and can be switched to the open state. When the back table 150 is switched from the opened state to the folded state, the elastic buckle can slide into the slot 1505 by external force, so as to be engaged with the slot 1505, and lock the back table 150 in the folded state.

In some embodiments, the latch may also be a rotary latch. When the rear table 150 is in the folded storage state and the rotary latch is rotated to enter the area where the storage groove 111 is located, the rear table 150 can be restricted in the storage groove 111, so that the rear table 150 is locked in the folded storage state. When the rotary latch is rotated to be away from the area where the receiving groove 111 is located, the locking of the rear table 150 is released, and the rear table 150 can be switched to the open state.

The shape of the rear table 150 is not particularly limited in the embodiments of the present disclosure. As shown in fig. 1, the rear table 150 includes: first and second opposing edges 1501, 1502, and third and fourth opposing edges 1503, 1504, wherein the first edge 1501 is adjacent to the back side of the vehicle seat body 110 when the rear table 150 is in the open state.

The second edge 1502 may be curved as shown to enhance the comfort of the back table 150 during use and to provide a smoother and more aesthetically pleasing profile. In this embodiment, aforementioned translucent end plate 157 and lamp strip subassembly set up along second edge 1502, no matter back table 150 is in the open mode, still fold and accomodate the state, and lamp strip subassembly is when opening, and the profile sense of back table 150 all can be outstanding, plays the effect of the interior atmosphere of drying and holding in the palm the car.

As shown in fig. 2, in this embodiment, the number of the covers 154 is two, and respectively includes a first condenser cover 1541 adjacent to and extending in the same direction as the third edge 1503, and a second condenser cover 1542 adjacent to and extending in the same direction as the fourth edge 1504, and the first condenser cover 1541 and the second condenser cover 1542 are configured to reflect light therebetween. Correspondingly, the number of the light supplement lamp panels 155 is also two, and the light supplement lamp panels are a first bar-shaped LED lamp panel 1551 emitting light to the first spotlight cover 1541 and a second bar-shaped LED lamp panel 1552 emitting light to the second spotlight cover 1542. Two light filling lamp panels 155 are fixed on the surface of second plate body 152 facing first plate body 151. As shown in the drawing, each of the first condenser lamp cover 1541 and the second condenser lamp cover 1542 includes an arc portion, and concave surfaces of the two arc portions are disposed to face each other. Through the cambered surface structure of two spotlight cover, can make light concentrate on the region between the two to regional reflection between the two, like this, the light filling effect is better. The concave surfaces of the curved portions of the first spotlight cover 1541 and the second spotlight cover 1542 may be provided with a reflective layer or a reflective structure to provide a similar effect.

Of course, the disclosed embodiments are not limited thereto, for example, the fill light panel 155 may be designed in other shapes or in other positions, for example, along the first edge 1501 or the second edge 1502. The lampshade can also adopt a plane light-transmitting lampshade or a curved surface light-transmitting lampshade and the like.

The specific structure of the lamp strip component is not limited. As shown in fig. 2 and 3, the light strip assembly comprises: the LED light source comprises a fixing member 1581, an LED light strip 1582, a semitransparent member 1583 and a brightening member 1584 which are sequentially arranged in the direction close to the light-transmitting end plate 157. The brightness enhancement member 1584 is fixed to the light-transmitting end plate 157, and a plurality of first engaging portions 1584a are provided on a side of the brightness enhancement member 1584 opposite to the light-transmitting end plate 157. The side of the fixing member 1581 facing the light-transmitting end plate 157 is provided with a plurality of second clamping portions 1581a, and the plurality of second clamping portions 1581a can be clamped with the plurality of first clamping portions 1584a in a one-to-one correspondence manner, so that the LED light strip 1582 and the translucent member 1583 are fixed between the fixing member 1581 and the brightness enhancement member 1584.

The specific structural forms of the first engagement portion 1584a and the second engagement portion 1581a are not limited, and are, for example, a hook and a slot, respectively. The function of the translucent member 1583 is to improve the uniformity of the light emission, so that the light is soft and not dazzling. The brightness enhancing member 1584 functions to enhance the brightness of the light output. In the disclosed embodiment, the specific structural design and materials used for the translucent member 1583 and the brightness enhancing member 1584 to perform their functions are not limited.

As shown in fig. 2 and 3, in the embodiment of the present disclosure, a side of the first plate 151 facing the second plate 152 has a plurality of third engaging portions 151a, a side of the second plate 152 facing the first plate 151 has a plurality of fourth engaging portions 152a capable of engaging with the plurality of third engaging portions 151a in a one-to-one correspondence manner, and the first plate 151 and the second plate 152 are fixedly connected by a plurality of threaded fasteners 159.

In some embodiments, a side of the light-transmitting end plate 157 close to the first plate 151 is integrally connected to a first positioning plate 1570a in a bending manner, and a side of the light-transmitting end plate 157 close to the second plate 152 is integrally connected to a second positioning plate 1570b in a bending manner, wherein the first positioning plate 1570a has at least one first positioning hole 1571a (two are shown), and each first positioning hole 1571a is capable of allowing one third engaging portion 151a to pass through. Based on this structure, the second positioning plate 1570b may also have at least one second positioning hole (not shown), each of which is capable of passing through one of the fourth engaging portions 152 a. In some embodiments, only the second positioning plate 1570b may be provided with the second positioning holes, and the first positioning plate 1570a is not provided with a similar positioning hole structure.

By adopting the design of the embodiments, when the first plate 151 and the second plate 152 are clamped, the light-transmitting end plate 157 can be fixed between the first plate 151 and the second plate 152 in a limited manner without fasteners such as screws, and the assembly and disassembly are very convenient.

When the rear desk board 150 is assembled, the light strip assembly is assembled with the light-transmitting end plate 157, then the first positioning plate 1570a integrally connected with the light-transmitting end plate 157 is positioned with the third clamping portion 151a on the first board body 151, then the first board body 151 and the second board body 152 are clamped, and finally the first board body 151 and the second board body 152 are firmly fixed by using the plurality of threaded fasteners 159. The threaded fastener 159 is, for example, a screw or a bolt. This design is advantageous for improving the assembly efficiency of the rear table 150.

Referring to fig. 1, an embodiment of the present disclosure also provides a vehicle seat 100 including: a vehicle seat body 110, and a rear table 150 of any of the foregoing embodiments provided on a back side of the vehicle seat body 110. The back side of the vehicle seat body 110 has a receiving groove 111 and a latch 112 at an edge of the receiving groove 111, the receiving groove 111 is configured to receive the rear table 150 in the folded and retracted state, and the latch 112 is configured to lock the rear table 150 in the folded and retracted state.

In the disclosed embodiment, the connecting structure of the rear table and the vehicle seat body is not limited, and as shown in fig. 1, the rear table 150 may be connected to the vehicle seat body 110 by a pair of hinge links 156. In other embodiments of the present disclosure, the rear table and the vehicle seat body may be directly hinged, or may be detachably clamped, etc.

The lateral wall that accomodates groove 111 and lamp area subassembly relative, like the roof side wall of accomodating groove 111 shown in the figure, can present the indent of certain radian, when back table 150 was in the folding state of accomodating, the light-emitting of lamp area subassembly was comparatively gathered together, can further strengthen the atmosphere aesthetic feeling.

Types of vehicle seats 100 include, but are not limited to, car seats, high-speed rail seats, aircraft seats, bus seats, and the like. The design of the rear desk plate 150 can meet the requirement of light utilization in the automobile, and the riding feeling is improved.

It will be understood that in this specification, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicate an orientation or positional relationship or dimension based on that shown in the drawings, which terms are used for convenience of description only 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 therefore should not be considered limiting to the scope of the disclosure.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.

In the present disclosure, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. 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 under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

This description provides many different embodiments or examples that can be used to implement the present disclosure. It should be understood that these various embodiments or examples are purely exemplary and are not intended to limit the scope of the disclosure in any way. Those skilled in the art can conceive of various changes or substitutions based on the disclosure of the specification of the present disclosure, which are intended to be included within the scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope defined by the appended claims.