阅读说明：本技术 三点定位式的吊顶系统 (Three-point positioning type ceiling system ) 是由 刘燕冰 于 2021-07-15 设计创作，主要内容包括：三点定位式的吊顶系统,包括上层吊顶组件与下层吊顶组件；其特征在于,还包括呈环形布置的第一定位件、竖立布置并插接在第一定位件上的上层侧板,上层侧板呈环形布置并在其内侧具有上层安装腔,第一定位件通过位于上层侧板外侧的拉杆定位到屋顶；还包括呈环形布置在第一定位件内侧的第二定位件、布置在第一定位件与第二定位件之间的过渡连接件,过渡连接件的两端分别插接连接到第一定位件、第二定位件上,第二定位件的内侧具有沿竖立方向布置的装饰壁,装饰壁呈环形布置并在其内侧具有下层安装腔,装饰壁顶部的水平高度高于过渡连接件但矮于上层侧板顶部的水平高度从而在第二定位件的外侧形成收藏灯槽。(The three-point positioning type suspended ceiling system comprises an upper layer suspended ceiling component and a lower layer suspended ceiling component; the roof is characterized by also comprising a first positioning piece arranged in an annular manner, and an upper layer side plate which is vertically arranged and is inserted on the first positioning piece, wherein the upper layer side plate is arranged in an annular manner and is provided with an upper layer installation cavity at the inner side, and the first positioning piece is positioned to the roof through a pull rod positioned at the outer side of the upper layer side plate; the lamp holder is characterized by further comprising a second positioning piece arranged on the inner side of the first positioning piece in an annular mode, and a transition connecting piece arranged between the first positioning piece and the second positioning piece, wherein two ends of the transition connecting piece are respectively connected to the first positioning piece and the second positioning piece in an inserting mode, a decorative wall arranged in the vertical direction is arranged on the inner side of the second positioning piece, the decorative wall is arranged in an annular mode and is provided with a lower-layer installation cavity on the inner side, and the horizontal height of the top of the decorative wall is higher than that of the transition connecting piece and is shorter than that of the top of an upper-layer side plate, so that a lamp storage groove is formed in the outer side of the second positioning piece.)

1. The three-point positioning type suspended ceiling system comprises an upper layer suspended ceiling component and a lower layer suspended ceiling component; the suspended ceiling assembly is characterized by comprising a first positioning piece and an upper layer side plate, wherein the first positioning piece is annularly arranged, the upper layer side plate is vertically arranged and is inserted on the first positioning piece, the upper layer side plate is annularly arranged and is provided with an upper layer installation cavity on the inner side, and the first positioning piece is positioned on a roof through a pull rod positioned on the outer side of the upper layer side plate; the lower-layer ceiling component comprises a second positioning piece and a transition connecting piece, wherein the second positioning piece is annularly arranged on the inner side of the first positioning piece, the transition connecting piece is arranged between the first positioning piece and the second positioning piece, two ends of the transition connecting piece are respectively connected to the first positioning piece and the second positioning piece in an inserting manner, the inner side of the second positioning piece is provided with a decorative wall arranged along the vertical direction, the decorative wall is annularly arranged and is provided with a lower-layer installation cavity on the inner side, the horizontal height of the top of the decorative wall is higher than that of the transition connecting piece but lower than that of the top of the upper-layer side plate, so that a storage lamp groove is formed on the outer side of the second positioning piece, the lower-layer ceiling component further comprises a lower-layer transverse plate located below the first positioning piece and the transition connecting piece, the lower-layer transverse plate is arranged along the horizontal direction, and the inner side edge of the lower-layer transverse plate is overlapped to the outer side of the second positioning piece, the lower surface of the lower-layer transverse plate is flush with the horizontal height of the bottom of the decorative wall.

2. The suspended ceiling system of claim 1, wherein the upper ceiling assembly further comprises corner connectors to which top ends of the upper side panels are inserted, and an upper cross panel forming a top wall of the upper mounting cavity and inserted horizontally onto the corner connectors; the pull rod is located outside the corner connecting piece, and the corner connecting piece is connected to the pull rod.

3. The suspended ceiling system of claim 1, wherein the lower ceiling assembly further comprises a trimming member disposed around the lower cross plate, wherein the L-shaped trimming member comprises a fixing wall and a supporting wall, the fixing wall is fixed on the wall body through screws, and the outer side of the lower cross plate is lapped on the supporting wall.

4. The ceiling system of any of claims 1-3, wherein the first positioning member is integrally formed with the transition piece.

5. The ceiling system of any of claims 1-3, wherein the first locator and the transition piece are two separate pieces.

6. The ceiling system of claim 5, wherein the transition piece includes an outer connector link, an inner connector link, and a transition arm connecting the outer and inner connector links.

7. The suspended ceiling system of claim 5, further comprising a lifting lug code, wherein the first positioning element comprises a first vertical wall and a transverse wall arranged at the lower end of the first vertical wall and extending inwards, an external connecting groove is arranged at the outer side of the first vertical wall, and two ends of the lifting lug code are respectively connected with the external connecting groove and the pull rod; the transverse wall is provided with a second vertical wall arranged at a distance from the first vertical wall, and the second vertical wall and the first vertical wall form a first socket for receiving the upper layer side plate; and a lower connecting groove is arranged on the lower side of the transverse wall and is used for connecting the transition connecting piece.

8. The suspended ceiling system of claim 7, wherein the transverse wall is further provided with a third vertical wall spaced from the second vertical wall, and the transverse wall, the second vertical wall and the third vertical wall form a lamp support.

9. The suspended ceiling system of any one of claims 1 to 3, wherein the second positioning element further comprises a second connecting groove, a first extending wall and a second extending wall, the notch of the second connecting groove and the extending direction of the first extending wall and the second extending wall face the outer side of the decorative wall, the second connecting groove is used for connecting the transition connecting piece, and the first extending wall and the second extending wall are arranged at intervals up and down to form a second inserting opening used for connecting the lower-layer transverse plate.

10. The ceiling system of claim 9, wherein the second positioning member is axially curved to impart an arc to the decorative wall; the transition connecting piece is connected with the first positioning piece and the second positioning piece in a spaced arrangement mode.

Technical Field

The invention relates to the technical field related to building decoration, in particular to a three-point positioning type ceiling system. The three-point positioning type ceiling system is used for a secondary ceiling.

Background

At present, house building decorations usually can use the suspended ceiling system to decorate in order to increase the aesthetic feeling on roof, and traditional suspended ceiling system generally uses decorative board (for example plank or gypsum board) to mat formation, and still can install second grade furred ceiling layer in order to further increase suspended ceiling system layering. Common second grade furred ceiling structure generally includes upper and lower two-layer diaphragm and connects the riser of two-layer diaphragm, and traditional second grade furred ceiling is fixed diaphragm and riser respectively through fossil fragments, then still need go on the ash and scribble the look to the decorative board surface, and this kind of structure is not only mounting structure complicated, and the diaphragm is extremely pleasing to the eye with the easy production gap of riser junction joint moreover. In order to enable the second-level suspended ceiling to be assembled and disassembled more simply, people invent connecting section pieces to connect the transverse plate and the vertical plate, for example, the Chinese utility model patent with the publication number of CN211499396U discloses an installation assembly suitable for a honeycomb panel integrated suspended ceiling, which comprises a suspended ceiling plate, an external corner line and an internal corner line, wherein the suspended ceiling plate is provided with two corners, the corners are disconnected and connected through the internal corner line and the external corner line, and two adjacent suspended ceiling plates are fixedly connected with the ceiling through connecting pieces; the corner joint problem of adjacent ceiling tiles in a ceiling system is effectively solved. In order to increase the function of the suspended ceiling system, as the inventor of the present invention applies for a Chinese patent with a publication number of CN103015601B earlier, a secondary suspended ceiling structure is also disclosed, the invention discloses a section-shaped base body, the base body is a rectangular section-shaped structure composed of wall bodies (11, 12, 13, 14), the top wall of the base body is provided with a first inserting edge extending upwards, a second inserting edge extending upwards is arranged at a low point position outside the base body, and thus, a secondary suspended ceiling with a drop height can be formed by connecting the first inserting edge and a decorative plate arranged in the upper and lower directions through the second inserting edge; a first slot and a second slot are arranged on the exposed wall body, and a decorative plate or a sheet-shaped body with an LED lamp embedded therein is respectively inserted into the first slot and the second slot; the decorative property of the corner transition part in the suspended ceiling and the flexibility of replacing the decorative plates are enhanced through the secondary suspended ceiling structural member, and although the structural member can form a prominent layering effect and install lighting lamps, the structural member is only suitable for constructing a straight-edge secondary suspended ceiling due to the overlarge cross section size.

Disclosure of Invention

The conventional straight-edge secondary ceiling structure can be directly connected and built through straight corner line members, but due to the fact that design models are various in practical application, for example, a secondary ceiling with an arc line model is expected to be built, if the existing members used are realized, particularly when the corner line members need to form a suspension shape or arrange a hidden lighting lamp, the corner line members with too large cross section width dimension are difficult to machine into the specified arc line shape, and if the arc members are independently subjected to mold opening manufacturing, the machining period is long, and the manufacturing and maintenance costs are high.

Aiming at the technical problems of complex and diversified modeling, high manufacturing and installing cost and the like of the conventional secondary ceiling system, the invention provides a three-point positioning type ceiling system, which comprises an upper layer ceiling component and a lower layer ceiling component; the suspended ceiling assembly is characterized by comprising a first positioning piece and an upper layer side plate, wherein the first positioning piece is annularly arranged, the upper layer side plate is vertically arranged and is inserted on the first positioning piece, the upper layer side plate is annularly arranged and is provided with an upper layer installation cavity on the inner side, and the first positioning piece is positioned on a roof through a pull rod positioned on the outer side of the upper layer side plate; the lower-layer ceiling component comprises a second positioning piece and a transition connecting piece, wherein the second positioning piece is annularly arranged on the inner side of the first positioning piece, the transition connecting piece is arranged between the first positioning piece and the second positioning piece, two ends of the transition connecting piece are respectively connected to the first positioning piece and the second positioning piece in an inserting manner, the inner side of the second positioning piece is provided with a decorative wall arranged along the vertical direction, the decorative wall is annularly arranged and is provided with a lower-layer installation cavity on the inner side, the horizontal height of the top of the decorative wall is higher than that of the transition connecting piece but lower than that of the top of the upper-layer side plate, so that a storage lamp groove is formed on the outer side of the second positioning piece, the lower-layer ceiling component further comprises a lower-layer transverse plate located below the first positioning piece and the transition connecting piece, the lower-layer transverse plate is arranged along the horizontal direction, and the inner side edge of the lower-layer transverse plate is overlapped to the outer side of the second positioning piece, the lower surface of the lower-layer transverse plate is flush with the horizontal height of the bottom of the decorative wall.

The first positioning piece is used as a main supporting component of the upper layer suspended ceiling assembly, a stable connection relation is formed by connecting the first positioning piece to the pull rod, and the first positioning piece is arranged in an annular mode to form a structural shape with good structural strength, so that the first positioning piece not only can support the upper layer side plate, but also can well fix the lower layer suspended ceiling assembly.

The second positioning piece is used as a main modeling component of the lower layer suspended ceiling assembly, the decorative wall on the second positioning piece is also a main exposed wall body, and partial wall bodies of the decorative wall extend into the upper layer installation cavity, so that the connection and installation of the transition connecting piece are facilitated on one hand, and the second positioning piece and the upper layer floor form a lamination effect on the other hand; in addition, the second positioning piece is mainly used for ensuring the exposed decorative wall, the suspended extension length of the second positioning piece can be realized by changing the length of the transition connecting piece, and therefore the section width of the second positioning piece can be set to be thinner so that the second positioning piece can be bent into different radians more easily.

The transition connecting piece is a component used for connecting the first positioning piece and the second positioning piece, and comprises an outer connecting buckle, an inner connecting buckle and a transition arm for connecting the outer connecting buckle and the inner connecting buckle. From bottom to top, the transition connecting piece is shielded by the second positioning piece and the lower-layer transverse plate, so that the arrangement mode of the transition connecting piece can be basically divided into the following two modes, wherein the first mode is a closed mode, namely the transition connecting piece is connected with the first positioning piece and the second positioning piece to form a closed annular connecting wall, the closed annular connecting wall is suitable for the situation that the two positioning pieces are equal in distance and are in a straight polygon shape, and the connecting mode has better structural strength; the second type is discontinuous, that is, the transition piece connects the first positioning piece and the second positioning piece in a discontinuous arrangement, which is suitable for the situation that the distance between the two positioning pieces is changed, for example, the second positioning piece is bent into an arc shape, and the transition piece can connect the second positioning piece and the first positioning piece together only by connecting the two positioning pieces at intervals.

According to the technical scheme, compared with the prior art, the invention has the beneficial technical effects that: firstly, the ceiling system is changed from the traditional integral ordering into the combination of an upper layer ceiling component and a lower layer ceiling component, so that the manufacturing and installation difficulty is greatly simplified, and the ceiling systems with different specifications can be combined by using sectional materials with the conventional specification, thereby being beneficial to reducing the manufacturing cost; secondly, the upper layer ceiling component and the lower layer ceiling component are of a split connection structure, the upper layer ceiling component is positioned on a roof through a pull rod, the lower layer ceiling component is connected to the upper layer ceiling component through the transition connecting piece, on one hand, the connection fixing strength of the upper layer ceiling is guaranteed, on the other hand, when the ceiling system is replaced, the integral disassembly like the traditional ceiling system is not needed, only the lower layer ceiling component is replaced, and the disassembly difficulty and the labor cost are greatly reduced; thirdly, because the transition connecting piece is a shielded component, the filtering connecting pieces are arranged at intervals and can be matched with the second positioning pieces with different shapes, and the characteristics of the shape diversity of the suspended ceiling system are met. And fourthly, the lower-layer installation cavity and the upper-layer installation cavity have partially overlapped structures, so that the suspended ceiling system has a stacked visual effect, a lamp groove for placing a lamp is formed between the second positioning piece and the upper-layer side plate, and the lighting function of the suspended ceiling system is increased.

In order to further enhance the structural stability of the ceiling system, a further technical scheme may be that the upper-layer ceiling assembly further includes a corner connecting member and an upper-layer transverse plate, the top end of the upper-layer side plate is inserted into the corner connecting member, and the upper-layer transverse plate forms a top wall of the upper-layer mounting cavity and is inserted into the corner connecting member along a horizontal direction; the pull rod is located outside the corner connecting piece, and the corner connecting piece is connected to the pull rod. The upper layer side plate can be better fixed through the first positioning piece and the corner connecting piece, after the corner connecting piece is connected to the pull rod, the upper layer ceiling component is positioned at two points, so that the upper layer ceiling component is more stably connected to the roof, and the structural stability of the whole ceiling system is greatly improved.

In order to better support the lower-layer suspended ceiling assembly, the lower-layer suspended ceiling assembly further comprises edge folding pieces arranged on the periphery of the lower-layer transverse plate, each L-shaped edge folding piece comprises a fixing wall and a supporting transverse wall, the fixing wall is fixed on a wall body through screws, and the outer side of the lower-layer transverse plate is lapped on the supporting transverse wall. Like this, the hem piece is in the outside of suspended ceiling system forms the third point and supports, improves greatly suspended ceiling system's structural stability.

In order to enable the first positioning element to be better connected with the upper layer side plate, the lifting lug code and the transition connecting piece, the further technical scheme can also be that the lifting lug code is further included, the first positioning element comprises a first vertical wall and a transverse wall arranged at the lower end part of the first vertical wall and extending inwards, an outer connecting groove is arranged on the outer side of the first vertical wall, and two ends of the lifting lug code are respectively connected with the outer connecting groove and the pull rod; the transverse wall is provided with a second vertical wall arranged at a distance from the first vertical wall, and the second vertical wall and the first vertical wall form a first socket for receiving the upper layer side plate; and a lower connecting groove is arranged on the lower side of the transverse wall and is used for connecting the transition connecting piece. Furthermore, a third vertical wall arranged at an interval with the second vertical wall is further arranged on the transverse wall, and the transverse wall, the second vertical wall and the third vertical wall form a lamp support.

For the convenience of the second setting element is connected transition connection spare and lower floor's diaphragm, further technical scheme can also be, the second setting element still includes second spread groove, first epitaxial wall and second epitaxial wall, the notch of second spread groove and the extending direction of first epitaxial wall and second epitaxial wall all towards decorate the outside of wall, the second spread groove is used for connecting transition connection spare, first epitaxial wall and second epitaxial wall interval arrangement form and are used for being connected the second socket of lower floor's diaphragm.

In order to reduce the number of mounting components and improve the assembly efficiency, a further technical scheme may be that the first positioning piece and the transition connecting piece are integrally formed.

Due to the above features and advantages, the present invention may be applied to a ceiling system having a three-point alignment type.

Drawings

FIG. 1 is an exploded view of the ceiling system;

FIG. 2 is a schematic axial view of the ceiling system showing the second positioning member being a straight plate-shaped connecting structure;

FIG. 3 is a schematic cross-sectional view of the ceiling system;

FIG. 4 is a schematic axial view of the first positioning member;

FIG. 5 is a schematic axial view of the second positioning member in a straight plate shape;

FIG. 6 is a schematic axial view of the transition piece;

FIG. 7 is a schematic axial view of the second positioning member in a curved shape;

fig. 8 is an axial structural view of the ceiling system showing the second positioning member in a curved connecting configuration.

Detailed Description

The structure of a three-point suspended ceiling system to which the technical solution of the present invention is applied will be further described with reference to the accompanying drawings. Various implementation details disclosed below may be selectively applied or combined in one embodiment even if not directly related or synergistic in functional terms, except where expressly specified to belong to equivalent or alternative embodiments.

As shown in fig. 1 to 3, the ceiling system includes an upper ceiling component 1 and a lower ceiling component 2; the upper-layer suspended ceiling assembly 1 comprises a first positioning piece 3 which is annularly arranged, an upper-layer side plate 11 which is vertically arranged and is inserted on the first positioning piece 3, the upper-layer side plate 11 is annularly arranged and is provided with an upper-layer installation cavity 10 on the inner side, a pull rod 41 and a lifting lug code 42 are further arranged on the outer side of the upper-layer side plate 11, two ends of the lifting lug code 42 are respectively connected to the pull rod 41 and the first positioning piece 3, and the first positioning piece 3 is positioned on a roof through the pull rod 41 and the lifting lug code 42. Thereby, it is many thereby first locating piece 3 forms the frame construction that the ring was arranged through the concatenation of angle sign indicating number, generally for simplifying the installation, first locating piece 3 is polygonized structure and does not set up the fillet, 3 fixed connection of first locating piece provides a stable connection basis for other members behind the roof, has improved the joint stability of suspended ceiling system at the furred ceiling subassembly on different layers greatly. In order to enable the first positioning element 3 to be better connected with other components, as shown in fig. 4, the first positioning element 3 includes a first vertical wall 31 and a transverse wall 32 disposed at the lower end of the first vertical wall 31 and extending inward, an outer connecting groove 33 is disposed at the outer side of the first vertical wall 31, a first buckle 43 engaged with the outer connecting groove 33 is disposed at one end of the outer side of the lifting lug 42, and an installation hole is disposed at one end of the inner side of the lifting lug 42, such that one end of the outer side of the lifting lug 42 is fixed on the pull rod 41 through a nut, and one end of the inner side is connected to the first positioning element 3 through the first buckle 43. The transverse wall 32 is provided with a second vertical wall 34 arranged at a distance from the first vertical wall 31, the second vertical wall 34 and the first vertical wall 31 form a first inserting opening 35 for receiving the upper layer side plate 11, so that the upper layer side plate 11 can be vertically inserted on the first positioning member 3, and the first positioning member 3 also becomes a first positioning point of the suspended ceiling system; a lower coupling groove 36 is further provided on the lower side of the lateral wall 32.

Lower floor's furred ceiling subassembly 2 is including being the annular arrangement first locating piece 3 inboard second locating piece 5, arrange transition piece 6 between first locating piece 3 and the second locating piece 5, the inboard of second locating piece 5 has along the decoration wall 51 of erectting the direction and arranging, decoration wall 51 is the annular and arranges and has lower floor's installation cavity 50 in its inboard, lower floor's furred ceiling subassembly 2 is still including being located lower floor's diaphragm 12 of first locating piece 3, transition piece 6 below. As shown in fig. 5, the second positioning element 5 is a main connecting component of the lower ceiling assembly, in order to facilitate the second positioning element 5 to connect other components, the second positioning element 5 further includes a second connecting groove 54, a first extending wall 52 and a second extending wall 53, the notch of the second connecting groove 54 and the extending directions of the first extending wall 52 and the second extending wall 53 both face the outer side of the decorative wall 51, the first extending wall 52 and the second extending wall 53 are arranged at intervals up and down to form a second insertion opening 55 for connecting the lower horizontal plate 12, wherein the first extending wall 52 is connected to the bottom end of the decorative wall 51. Thus, the lower layer transverse plate 12 is arranged along the horizontal direction and the inner side of the lower layer transverse plate 12 is overlapped with the outer side of the second positioning part 5, the lower surface of the lower layer transverse plate 12 is level with the horizontal height of the bottom of the decorative wall 51, and therefore the lower surface of the lower layer transverse plate 2 and the decorative wall 51 can form a smooth turning angle.

Further, as shown in fig. 6, the transition connection member 6 includes an outer connection buckle 61, an inner connection buckle 62 and a transition arm 63 connecting the outer connection buckle 61 and the inner connection buckle 62, the outer connection buckle 61 is connected in the lower connection groove 36 of the first positioning member 3, the inner connection buckle 62 is connected in the second connection groove 54, so that two ends of the transition connection member 6 are respectively connected to the first positioning member 3 and the second positioning member 5 in an inserting manner, that is, the lower ceiling assembly 2 is connected to the upper ceiling assembly 1 through the transition connection member 6.

In order to provide the ceiling system with obvious layering and add lighting function, the top of the decorative wall 51 has a higher level than the transition piece 6 but lower level than the top of the upper side plate 11 so as to form a light collecting groove 13 outside the second positioning member 5. The transverse wall 32 is further provided with a third vertical wall 37 arranged at an interval with the second vertical wall 34, and the transverse wall 32, the second vertical wall 34 and the third vertical wall 37 form a lamp bracket, so that a lighting lamp can be better placed and fixed.

In order to further enhance the structural stability of the ceiling system, a further technical solution may be that the upper-layer ceiling assembly 1 further includes a corner connector 7 and an upper-layer transverse plate 14, the top end of the upper-layer transverse plate 11 is inserted into the corner connector 7, and the upper-layer transverse plate 14 forms a top wall of the upper-layer installation cavity 10 and is inserted into the corner connector 7 along a horizontal direction; the pull rod 41 is located outside the corner connector 7, and the corner connector 7 is connected to the pull rod 41. Through first link setting element 3 can be fixed better with corner connecting piece 7 upper strata curb plate 11, and the corner connecting piece 7 is connected to back on the pull rod 41, upper ceiling subassembly 1 has just formed two point location, lets like this upper ceiling subassembly 1 connects more steadily on the roof, improves whole ceiling system's structural stability greatly.

In order to better support the lower-layer suspended ceiling assembly 2, according to a further technical scheme, the lower-layer suspended ceiling assembly 2 further comprises a side closing member 8 arranged on the periphery of the lower-layer transverse plate 12, the side closing member 8 in an L shape comprises a fixed standing wall 81 and a supporting transverse wall 82, the fixed standing wall 81 is attached to a wall or a base body and fixed through screws, and the outer side of the lower-layer transverse plate 12 is overlapped with the supporting transverse wall 82. Like this, edging 8 is in the outside of suspended ceiling system forms the third point and supports, improves greatly suspended ceiling system's structural stability.

The arrangement of the transition piece 6 can be basically divided into two types, namely a closed type and an interrupted type, and the following two embodiments are specifically described:

in a first embodiment, as shown in fig. 1 and 2, the gaps between the first positioning member 3 and the second positioning member 5 are substantially equal, and both positioning members are in a right-angled polygonal ring structure, so that the transition member 6 can form a closed ring and connect the first positioning member 3 and the second positioning member 5, and the connection strength of the upper-layer ceiling assembly and the lower-layer ceiling assembly is better. In this embodiment, the first positioning member 3 and the transition piece 6 may be integrally formed for further simplifying installation, which is advantageous for improving installation efficiency.

In a second embodiment, as shown in fig. 7 and 8, the first positioning member 3 is a right-angled polygonal ring structure, and the second positioning member 5 has a structure with an arc-shaped rounded corner at the corner, at this time, the distance between the first positioning member 3 and the second positioning member 5 at the arc-shaped position is uneven, and a closed connection cannot be formed by using the transition piece 6. However, from bottom to top, the transition connecting piece 6 is sheltered from by the second setting element 5 and lower floor's diaphragm 12, the transition connecting piece 6 is not the outward appearance component, so arrange through the first setting element 3 with the equal position interlude of second setting element 5 interval the transition connecting piece 6 is connected and can be realized connecting upper ceiling subassembly and lower floor's ceiling subassembly equally, and this kind of arrangement mode not only connects more in a flexible way, but also is favorable to improving the component commonality and reducing manufacturing cost.