阅读说明：本技术 热水器线盒、面盖组装结构及热水器 (Water heater wire box, face lid package assembly and water heater ) 是由 林钦 叶伟林 胡勇 丁泺火 林玉绵 刘小平 王映涵 于 2019-08-19 设计创作，主要内容包括：本发明公开了一种热水器线盒、面盖组装结构及热水器；热水器线盒包括显示盒和安装在显示盒内的显示组件,显示组件包括壳体、显示板和显示灯架；壳体与显示板卡扣连接,壳体设有第一定位结构,显示板设有与第一定位结构定位配合的第一配合结构；显示灯架与显示板卡扣连接,显示灯架设有第二定位结构,显示板设有与第二定位结构定位配合的第二配合结构。本发明通过导向结构和配合结构的定位配合,便于壳体、显示板和显示灯架三者之间的定位连接,提高装配效率；并且将壳体、显示板和显示灯架的连接关系设计为卡扣连接,提高装配简易度,进而提高生产效率。(The invention discloses a water heater wire box, a surface cover assembly structure and a water heater; the water heater wire box comprises a display box and a display assembly arranged in the display box, wherein the display assembly comprises a shell, a display panel and a display lamp holder; the shell is connected with the display panel in a buckling mode, the shell is provided with a first positioning structure, and the display panel is provided with a first matching structure matched with the first positioning structure in a positioning mode; the display lamp bracket is connected with the display panel in a buckling mode, the display lamp bracket is provided with a second positioning structure, and the display panel is provided with a second matching structure matched with the second positioning structure in a positioning mode. According to the invention, through the positioning matching of the guide structure and the matching structure, the positioning connection among the shell, the display panel and the display lamp holder is facilitated, and the assembly efficiency is improved; and the connection relation design of casing, display panel and demonstration lighting fixture is the buckle connection, improves the assembly degree of simplicity, and then improves production efficiency.)

1. A water heater wire box comprising a display box (1) and a display assembly (2) mounted within the display box (1), characterised in that the display assembly (2) comprises a housing (21), a display panel (22) and a display bracket (23);

the shell (21) is connected with the display panel (22) in a buckling mode, the shell (21) is provided with a first positioning structure, and the display panel (22) is provided with a first matching structure matched with the first positioning structure in a positioning mode;

the display lamp holder (23) is connected with the display panel (22) in a buckling mode, a second positioning structure is arranged on the display lamp holder (23), and a second matching structure matched with the second positioning structure in a positioning mode is arranged on the display panel (22).

2. The water heater wire box according to claim 1, wherein the first positioning structure comprises a plurality of first positioning posts (211) arranged on the bottom wall of the shell (21), and two adjacent first positioning posts (211) are arranged at intervals; the first matching structure comprises a plurality of first positioning holes (221) formed in the display panel (22), and the first positioning columns (211) and the first positioning holes (221) are matched in a one-to-one correspondence mode.

3. The water heater line box according to claim 1 or 2, wherein the bottom wall of the case (21) is provided with a support structure supporting the display panel (22).

4. The water heater line box according to claim 3, wherein the support structure comprises a plurality of elastic supports (212), the elastic supports (212) abutting against the display panel (22) and elastically supporting the display panel (22);

when the first positioning structure comprises a plurality of first positioning columns (211), the plurality of elastic supporting pieces (212) are correspondingly connected with the plurality of first positioning columns (211) one by one.

5. The water heater line box according to claim 4, characterized in that the support structure further comprises several fixed supports (213), the height of the fixed supports (213) being smaller than the height of the elastic supports (212) in the unsupported state.

6. The water heater wire box according to claim 1, wherein one of the opposite side walls of said case (21) is provided with a fixing catch (214), and the other of the opposite side walls of said case (21) is provided with an elastic catch (215); one side of the display panel (22) is limited by the fixed buckle (214), and the other side of the display panel is limited by the elastic buckle (215).

7. The water heater wire box according to claim 6, wherein the fixing catch (214) is provided with a first guide surface (216) so that one side of the display panel (22) can be moved along the first guide surface (216) to below the fixing catch (214);

and/or, the elastic buckle (215) is provided with a second guide surface (217), so that the other side of the display panel (22) can move along the second guide surface (217) to be below the elastic buckle (215).

8. The water heater wire box according to claim 1, wherein the second positioning structure comprises a plurality of second positioning columns (321) arranged at the bottom of the display lamp holder (23), wherein two of the second positioning columns (321) are respectively arranged at two opposite corners of the display lamp holder (23); the second matching structure is a second positioning hole (222) arranged on the display panel (22), and the plurality of second positioning columns (321) and the plurality of second positioning holes (222) are matched in a one-to-one corresponding mode.

9. The water heater wire box according to claim 1, wherein the display lamp holder (23) is provided with a first catch (232), and the display panel (22) is provided with a first catch hole (223) adapted to the first catch (232).

10. The water heater line box according to claim 1, characterized in that the display box (1) comprises a cover (11) and a box (12) which are detachably connected; the shell (21) is connected with the box body (12) in a buckling mode, the shell (21) is provided with a third positioning structure, and the box body (12) is provided with a third matching structure matched with the third positioning structure in a positioning mode.

11. The water heater wire box according to claim 10, wherein the third positioning structure comprises a plurality of third positioning pillars (218), wherein a connecting line direction of two of the third positioning pillars (218) and a length direction of the housing (21) are at an angle to each other; the third matching structure is a third positioning hole (121) formed in the bottom wall of the box body (12), and the plurality of third positioning columns (218) are matched with the plurality of third positioning holes (121) in a one-to-one corresponding mode.

12. The water heater wire box according to claim 10, wherein the housing (21) is provided with second catches (219) on both opposite side walls; and second clamping holes (122) matched with the second clamping buckles (219) are formed in two opposite side walls of the box body (12).

13. A face cover assembly structure characterized by comprising a face cover body (3) and a water heater line box according to any one of claims 1 to 12;

when the display box (1) comprises a cover body (11) and a box body (12) which are connected, the face cover body (3) is provided with a mounting hole (31), and the size of the mounting hole (31) is smaller than that of the cover body (11) and the box body (12); the cover body (11) and the box body (12) are respectively arranged on two opposite sides of the mounting hole (31).

14. The face cover assembly structure according to claim 13, wherein the face cover body (3) is provided with a stopper plate (32) at the mounting hole (31), and the cover body (11) is provided with a third catch (111) that engages with the stopper plate (32).

15. The face cover assembly structure according to claim 13, further comprising a trim strip (4) installed between the face cover body (3) and the cover body (11), wherein the face cover body (3) is provided with a recessed area (33) around the installation hole (31) for accommodating the trim strip (4).

16. A water heater comprising the surface cover assembly structure as recited in claims 13 to 15.

Technical Field

The invention relates to the technical field of water heaters, in particular to a water heater wire box, a surface cover assembly structure and a water heater.

Background

The gas water heater occupies a larger proportion in the water heater market, and becomes the first choice of a plurality of household water heaters. In the field of the existing household gas water heater, the design thinking of the control surface cover is changed from mechanical control to control of the display module, so that the wire box assembly of the water heater is required to have a display function, the existing wire box assembly with the display function is also provided with a plurality of display components besides the wire box component, each component needs to be separately produced and processed and then assembled, the assembly operation is complex, and the production efficiency is low.

Disclosure of Invention

The invention aims to provide a water heater wire box, which aims to solve the problems that the assembly operation of the existing wire box component is complex and the production efficiency of a product is influenced.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a water heater wire box comprises a display box and a display assembly arranged in the display box, wherein the display assembly comprises a shell, a display panel and a display lamp holder;

the shell is connected with the display panel in a buckling mode, the shell is provided with a first positioning structure, and the display panel is provided with a first matching structure matched with the first positioning structure in a positioning mode;

the display lamp bracket is connected with the display panel in a buckling mode, the display lamp bracket is provided with a second positioning structure, and the display panel is provided with a second matching structure matched with the second positioning structure in a positioning mode.

According to the water heater wire box provided by the invention, the positioning and the connection among the shell, the display panel and the display lamp bracket are facilitated through the positioning and the matching of the guide structure and the matching structure, so that the assembly efficiency is improved; and the connection relation design of casing, display panel and demonstration lighting fixture is the buckle connection, improves the assembly degree of simplicity, and then improves production efficiency.

In addition, the water heater wire box according to the above embodiment of the present invention may further have the following additional technical features:

according to an example of the invention, the first positioning structure comprises a plurality of first positioning columns arranged on the bottom wall of the shell, and every two adjacent first positioning columns are arranged at intervals; the first matching structure comprises a plurality of first positioning holes formed in the display panel, and the first positioning columns are matched with the first positioning holes in a one-to-one correspondence mode.

According to an example of the invention, the bottom wall of the housing is provided with a support structure for supporting the display panel.

According to an example of the present invention, the support structure includes a plurality of elastic support members, which are abutted against the display panel and elastically support the display panel;

when the first positioning structure comprises a plurality of first positioning columns, the elastic supporting pieces are connected with the first positioning columns in a one-to-one correspondence mode.

According to an example of the invention, the support structure further comprises a number of fixed supports, the height of which is smaller than the height of the resilient supports in the unsupported state.

According to one example of the invention, one of the two opposite side walls of the shell is provided with a fixed buckle, and the other of the two opposite side walls of the shell is provided with an elastic buckle; one side of the display panel is limited by the fixing buckle, and the other side of the display panel is limited by the elastic buckle.

According to an example of the present invention, the fixing clip is provided with a first guide surface so that one side of the display panel can move along the first guide surface to below the fixing clip;

and/or the elastic buckle is provided with a second guide surface, so that the other side of the display panel can move to the position below the elastic buckle along the second guide surface.

According to an example of the present invention, the second positioning structure includes a plurality of second positioning columns disposed at the bottom of the display lamp holder, wherein two of the second positioning columns are disposed at two opposite corners of the display lamp holder respectively; the second matching structure is a second positioning hole arranged on the display panel, and the plurality of second positioning columns are matched with the plurality of second positioning holes in a one-to-one correspondence manner.

According to an example of the present invention, the display lamp holder is provided with a first buckle, and the display panel is provided with a first buckle hole adapted to the first buckle.

According to one example of the present invention, the display box includes a cover body and a box body which are detachably connected; the casing with the box body buckle is connected, the casing is equipped with third location structure, the box body be equipped with third location structure location complex third cooperation structure.

According to an example of the present invention, the third positioning structure includes a plurality of third positioning pillars, wherein a connecting line direction of two of the third positioning pillars and a length direction of the housing form an angle with each other; the third matching structure is a third positioning hole formed in the bottom wall of the box body, and the plurality of third positioning columns are matched with the plurality of third positioning holes in a one-to-one correspondence mode.

According to one example of the invention, the two opposite side walls of the shell are provided with second buckles; and second clamping holes matched with the second clamping buckles are formed in two opposite side walls of the box body.

A second object of the present invention is to provide a surface cover assembly structure, which comprises a surface cover body and the water heater wire box according to the above technical solution; when the display box comprises a cover body and a box body which are connected, the face cover body is provided with a mounting hole, and the size of the mounting hole is smaller than that of the cover body and the box body; the cover body and the box body are respectively arranged on two opposite sides of the mounting hole.

According to an example of the present invention, the face cover body is provided with a limiting plate at the mounting hole, and the cover body is provided with a third buckle matching with the limiting plate.

According to an example of the invention, the decorative strip is installed between the face cover body and the cover body, and the face cover body is provided with a recessed area for accommodating the decorative strip around the installation hole.

A third object of the present invention is to provide a water heater, which includes the above-mentioned surface cover assembly structure.

Advantages of the above additional aspects 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 invention.

Drawings

FIG. 1 is an exploded view of a water heater junction box of an embodiment of the present invention;

FIG. 2 is a schematic structural view (one) of a water heater wire box according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a water heater wire box according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a display module according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an internal structure of a display module according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an assembled display panel and display lamp holder according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a display lamp holder according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a display lamp holder according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a display panel according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a housing according to an embodiment of the present invention;

fig. 11 is a schematic view of a panel cover assembly structure according to an embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a display box; 11. a cover body; 111. a third buckle; 12. a box body; 121. a third positioning hole; 122. a second card hole; 123. connecting holes;

2. a display component;

21. a housing; 211. a first positioning post; 212. an elastic support member; 213. a fixed support; 214. fixing the buckle; 215. elastic buckle; 216. a first guide surface; 217. a second guide surface; 218. a third positioning column; 219. a second buckle;

22. a display panel; 221. a first positioning hole; 222. a second positioning hole; 223. a first card hole; 224. a spring; 225. a second through hole; 226. a display device;

23. a display lamp holder; 231. a second positioning column; 232. a first buckle; 233. a first through hole; 234. a display aperture;

3. a face cover body; 31. mounting holes; 32. a limiting plate; 33. a recessed region;

4. and (7) decorating strips.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1 to 3, the present embodiment provides a water heater wire box, which includes a display box 1 and a display assembly 2 installed in the display box 1, wherein the display assembly 2 includes a housing 21, a display panel 22 and a display lamp holder 23; the casing 21 of the embodiment mainly serves to connect the display panel 22 with the display box 1 and protect the display panel 22 to a certain extent, the casing 21 may be a rectangular casing 21 in the figure, and has a bottom wall and a side wall connected to the periphery of the bottom wall, and the side wall is provided with a notch for conveniently leading out or leading in a connecting line of the display panel 22; the display panel 22 of the present embodiment may be specifically a PCB circuit board, which has a circuit therein, and a spring 224 and a display device 226 disposed on the surface thereof; the display holder 23 of the present embodiment is mainly used for protecting the display panel 22, and has a plurality of first through holes 233 adapted to the springs 224, and a rectangular display hole 234 formed in the middle thereof, wherein the display hole 234 is adapted to the display device 226 of the display panel 22.

Since the specific circuit structure and operation principle of the PCB board, etc. are well known to those skilled in the art, they will not be described herein too much, and the specific structures and modifications of the above-described housing 21, display panel 22 and display lamp holder 23 will be given below.

In order to solve the problems mentioned in the background art and improve the assembly efficiency of the display module 2, the present embodiment improves the structure and connection relationship among the housing 21, the display panel 22 and the display holder 23.

Firstly, a shell 21 and a display panel 22 are designed to be in snap connection, a first positioning structure is arranged on the shell 21, and a first matching structure matched with the first positioning structure in a positioning way is arranged on the display panel 22; when the housing 21 is assembled with the display panel 22, the first positioning structure and the first matching structure are positioned and matched to realize positioning connection therebetween, and then the first positioning structure and the first matching structure are connected together through the snap structure.

Further, in this embodiment, the display lamp holder 23 and the display panel 22 are also designed to be in snap-fit connection, the display lamp holder 23 is provided with a second positioning structure, and the display panel 22 is provided with a second matching structure which is matched with the second positioning structure in a positioning manner. Similarly, when the display lamp holder 23 is assembled with the display panel 22, the positioning connection between the second positioning structure and the second matching structure is realized through the positioning matching of the second positioning structure and the second matching structure, and then the two are connected together through the buckling structure.

The structure is convenient for the positioning connection among the shell 21, the display panel 22 and the display lamp holder 23 through the positioning matching of the guide structure and the matching structure, and the assembly efficiency is improved; and the connection relation of the shell 21, the display panel 22 and the display lamp holder 23 is designed to be in snap connection, so that the assembly simplicity is improved, and the production efficiency is further improved.

Referring to fig. 1 and 10, the first positioning structure of this embodiment includes a plurality of first positioning posts 211 disposed on the bottom wall of the housing 21, two adjacent first positioning posts 211 are disposed at intervals, specifically, the number of the positioning posts of this embodiment is two, each group includes two first positioning posts 211 disposed at intervals, two groups of first positioning posts 211 are disposed on two opposite sides of the bottom wall of the housing 21, the first matching structure of this embodiment includes a plurality of first positioning holes 221 disposed on the display panel 22, the plurality of first positioning posts 211 and the plurality of first positioning holes 221 are matched in a one-to-one correspondence, specifically, the first positioning posts 211 are in clearance fit with the first positioning holes 221, and the clearance amount is determined according to the design requirement.

In order to support and protect the display panel 22, the present embodiment further includes a supporting structure for supporting the display panel 22 on the bottom wall of the housing 21, specifically, the supporting structure of the present embodiment includes a plurality of elastic supporting members 212, the elastic supporting members 212 abut against the display panel 22 and elastically support the display panel 22, and preferably, based on the first positioning pillars 211, the plurality of elastic supporting members 212 of the present embodiment are connected with the plurality of first positioning pillars 211 in a one-to-one correspondence, and the elastic supporting members 212 and the first positioning pillars 211 may be integrally connected, that is, integrally formed during processing.

Further, the supporting structure of the present embodiment further includes a plurality of fixing supporting members 213, and the fixing supporting members 213 are not unique in structural form, and as shown in the figure, a cross section of one fixing supporting member 213 is cross-shaped, and a cross section of one fixing supporting member 213 is i-shaped.

The height of the fixed support 213 of the embodiment is designed to be smaller than the height of the elastic support 212 in an unsupported state, that is, when the display panel 22 is not installed in the housing 21, the height of the elastic support 212 is larger than the height of the fixed support 213, when the display panel 22 is installed in the housing 21 through the snap structure, the elastic support 212 presses down the elastic support 212, the elastic support 212 elastically supports and protects the display panel 22, when the display panel 22 is subjected to a larger pressure, the height of the elastic support 212 is pressed down to be flush with the fixed support 213, and at this time, both the elastic support 212 and the fixed support 213 support and protect the display panel 22, thereby improving the installation stability of the display panel 22.

Based on the structure of the elastic supporting element 212, the present embodiment further improves the snap-fit connection between the housing 21 and the display panel 22, and the present embodiment is provided with a fixed snap 214 on one of the two opposite side walls of the housing 21 and an elastic snap 215 on the other of the two opposite side walls of the housing 21; one side of the display panel 22 is retained by the fixing catch 214, and the other side of the display panel 22 is retained by the elastic catch 215.

When the display panel 22 is installed, one side of the display panel 22 is installed below the fixing buckle 214, then the other side of the display panel 22 presses the elastic buckle 215 downwards, so that the elastic buckle 215 deforms, the other side of the display panel 22 is limited below the elastic buckle 215, at the moment, the display panel 22 has certain pressure on the elastic support part 212, so that the elastic support part 212 generates elastic support for the display panel 22, the structure is simple and convenient to install, better installation stability is achieved, the connection between the display panel 22 and the shell 21 can be released under the restoring force of the elastic support part 212 only by pressing the elastic buckle 215, and the maintenance and replacement of the display panel 22 are facilitated.

Based on the above structure, the present embodiment also optimizes the structure of the fixing clip 214 and the elastic clip 215, and the fixing clip 214 is provided with the first guide surface 216, so that one side of the display panel 22 can move along the first guide surface 216 to below the fixing clip 214; similarly, the second guide surface 217 is disposed on the elastic catch 215, so that the other side of the display panel 22 can move along the second guide surface 217 to the lower side of the elastic catch 215, thereby further improving the assembling efficiency of the housing 21 and the display panel 22.

Referring to fig. 3-9, the second positioning structure of the present embodiment includes a plurality of second positioning posts 231 disposed at the bottom of the display lamp holder 23, and considering that the area of the structure of the display lamp holder 23 itself is small, the number of the second positioning posts 231 of the present embodiment is two, and the two second positioning posts 231 are disposed at two opposite corners of the display lamp holder 23 respectively, so as to prevent the display lamp holder from being inserted reversely during assembly, and to achieve a certain fool-proof effect.

Correspondingly, the second matching structure of the present embodiment is the second positioning hole 222 disposed on the display panel 22, and the plurality of second positioning pillars 231 and the plurality of second positioning holes 222 are matched in a one-to-one correspondence manner, and similarly, the second positioning pillars 231 and the second positioning holes 222 of the present embodiment are also in clearance fit, and the specific clearance is determined according to the design requirement.

The specific snap-fit connection manner of the display lamp holder 23 and the display panel 22 of this embodiment is as follows: the display lamp holder 23 is provided with a first buckle 232, and the display panel 22 is provided with a first buckle hole 223 matched with the first buckle 232; the engaging amount of the first latch 232 and the first latch hole 223 is also designed according to the requirement, and the embodiment is not described herein too much.

Referring to fig. 1 again, the display box 1 of the present embodiment generally includes a cover 11 and a box 12 that are detachably connected, the box 12 is also provided with a notch for leading out and leading in a connection line of the display panel 22, and since the cover 11 is connected to the box 12 after assembly, the connection between the box 12 and the cover 11 will not be described here, and the box 12 will be described as a part of a cover assembly structure described below.

In order to facilitate the assembly of the display module 2 and the box 12, the housing 21 and the box 12 of the display module 2 of the present embodiment are improved to be connected by a buckle, and the housing 21 is provided with a third positioning structure, and the box 12 is provided with a third matching structure matched with the third positioning structure in a positioning manner.

Specifically, the third positioning structure of the present embodiment includes a plurality of third positioning pillars 218, wherein a connection line direction of two third positioning pillars 218 and a length direction of the housing 21 form an angle with each other, so as to perform a fool-proof function; correspondingly, the third matching structure of the present embodiment is the third positioning hole 121 disposed on the bottom wall of the box 12, the plurality of third positioning pillars 218 are matched with the plurality of third positioning holes 121 in a one-to-one correspondence, and similarly, the third positioning pillars 218 and the third positioning holes 121 can also be designed to be in clearance fit.

Further, in order to ensure the connection stability between the housing 21 and the box 12, in this embodiment, the second fasteners 219 are disposed on two opposite sidewalls of the housing 21, and each sidewall has two second fasteners 219; correspondingly, the second fastening holes 122 adapted to the second fasteners 219 are disposed on two opposite side walls of the box 12, and the second fasteners 219 can be deformed to a certain extent, so as to facilitate the assembly of the box 12 and the housing 21.

As shown in fig. 11, based on the water heater line box, the present embodiment further provides a surface cover assembly structure, which includes a surface cover body 3 and the water heater line box; when the display box 1 comprises a cover body 11 and a box body 12 which are connected, the face cover body 3 is provided with a mounting hole 31, and the size of the mounting hole 31 is smaller than that of the cover body 11 and the box body 12; the cover 11 and the box 12 are respectively installed on two opposite sides of the installation hole 31, the cover 11 and the box 12 are detachably connected through a connecting member such as a screw (not shown in the figure), a second through hole 225 for passing the screw is formed in the display panel 22, a connection hole 123 connected with the screw is formed in the box 12, the installation hole 31 is designed to facilitate passing of a connection structure such as a screw, and connection between the cover 11 and the display module 2 can be facilitated.

Preferably, in order to prevent the connected box 12 and cover 11 from moving on the face cover, the face cover body 3 of the present embodiment includes two position limiting plates 32 at the mounting hole 31, the number of the position limiting plates 32 may be two in the figure, that is, one position is respectively disposed at two sides of the mounting hole 31, a third buckle 111 is disposed at one side of the cover 11 close to the face cover, and the third buckle 111 is engaged with the position limiting plates 32 to ensure the stability of the box 12 and the cover 11 on the face cover body 3.

In addition, in order to improve the overall aesthetic measure, the surface cover assembly structure of the present embodiment further includes a decoration strip 4 installed between the surface cover body 3 and the cover body 11, and the surface cover body 3 is provided with a recessed area 33 for accommodating the decoration strip 4 around the installation hole 31, so as to reduce the thickness of the whole surface cover and improve the aesthetic measure of the surface cover.

Based on the above structure, the present embodiment provides a water heater (not shown in the drawings), which includes the surface cover assembly structure according to the above technical solution, and the water heater may specifically be a gas water heater, and since other structures and specific operating principles of the water heater except the surface cover assembly structure are common knowledge of those skilled in the art, the present embodiment will not be described herein.

In the description of the present invention, it is to be understood that the terms "inside", "outside", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and should not be construed 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.