CN102960978B - Plug structure for bed and plug structure-based bedding - Google Patents
Plug structure for bed and plug structure-based bedding Download PDFInfo
- Publication number
- CN102960978B CN102960978B CN201210407329.0A CN201210407329A CN102960978B CN 102960978 B CN102960978 B CN 102960978B CN 201210407329 A CN201210407329 A CN 201210407329A CN 102960978 B CN102960978 B CN 102960978B
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- CN
- China
- Prior art keywords
- column
- bed
- connector
- cylindrical shell
- straight portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C19/00—Bedsteads
- A47C19/20—Multi-stage bedsteads; e.g. bunk beds; Bedsteads stackable to multi-stage bedsteads
Abstract
The invention discloses a plug structure for bedding. The plug structure comprises a column 1 and a cross bar connected with the column, and the column and the cross bar are connected through a connector 8 which comprises a cylinder 21 and a clamped hook body 22, wherein the clamped hook body comprises a hook-shaped part hooked at the column and a straight-edge part clamped at one side of the column; a cylinder port at the other side of the cylinder is formed with an internally retracted outer edge; and the cross bar is connected at the outer edge. The invention further provides basic forms of single-layer beds or bunk beds and apartment beds based on the above connecting structure. The bedding provided by the invention is beautiful, simple, firm, durable, green, and environmentally friendly. By using a stamping process, a welding process is omitted and production cost is reduced; and by using a component connecting form such as inserting and combining, size is reduced and transportation and installation are facilitated.
Description
Technical field
The present invention relates to single bed, levels makes the bed or the improvement of the bed body such as dormitory bed, more particularly, relate to the improvement of an attachment structure.
Background technology
The existing bed for student or other staff apartment, mainly with irony section bar, forms bunk bed body or individual layer bed or student dormitory bed etc. by welding.
Problem is, this type of body is due to needs welded and installed, and therefore field-installed quantities is larger.In addition, also there is the problems such as transport inconvenience.
Summary of the invention
The present invention aims to provide a kind of convenient transport and field erected bed body, by improving the syndeton of bed body, with multiple parts by grafting assembling bed body, thus reaches object easily.
In order to achieve the above object, the invention provides a kind of connected structure for bed accessory, comprise the column of supporting bed body, and be connected to the cross bar on column.The cross section of described column is in " C " type structure, and be arc transition in the middle part of it, dual-side is at a right angle, and each side forms right angle flanging again respectively, and forms crimp in end.Described column is connected by connector with cross bar.Described connector comprises cylindrical shell and is plugged in the clamping coupler body of described cylindrical shell side tube port position; The hook portion that described clamping coupler body comprises column crimp described in clasp joint and the straight portion be stuck on described column one side.Described straight portion stamps out grafting clamp, is plugged in the bayonet socket of described column side.The end of described cross bar is inserted in the opposite side nozzle of described cylindrical shell, and is connected in the outer rim place of nozzle after forming enlarging.
In order to attractive in appearance and increase fastness, the part that the side of described column is connected in described connector caves inward, and makes the straight portion of described clamping coupler body and the straight circular arc portion being transitioned into described column of cylinder body outer wall.
In order to further firmly bed structure, the part that described connector contacts with described column is wide compared with rear side described cylindrical shell size; And the straight portion of described connector comprises grafting clamp described in upper and lower two places, corresponding described column side arranges bayonet socket described in two places.
Syndeton of the present invention is applicable to the connection of bed or guardrail and column, and specifically, described cross bar is form the surrounding crossbeam of bed or form the horizon bar of guardrail.
Present invention also offers the bed accessory based on above-mentioned connected structure, comprise the column laying respectively at corner supporting bed body.The cross section of described column is in " C " type structure, and be arc transition in the middle part of it, dual-side is at a right angle, and each side forms right angle flanging again respectively, and forms crimp in end.Described four root posts are connected to four crossbeams surrounding bed respectively by connector; The cross section of described crossbeam is in " G " type structure; The openend of described " C " type column and " G " type crossbeam is inside bed body.Described connector comprises cylindrical shell and is plugged in the clamping coupler body of described cylindrical shell side tube port position; The hook portion that described clamping coupler body comprises column crimp described in clasp joint and the straight portion be stuck on described column one side; Described straight portion stamps out grafting clamp, is plugged in the bayonet socket of described column side.The end of described crossbeam is inserted in the opposite side nozzle of described cylindrical shell, and is connected in the outer rim place of nozzle after forming enlarging.
Above-mentioned bed accessory can make two-berth double-decker, and specifically, comprise the two-layer bed supported by described four root posts, described upper bed is equipped with cat ladder.
No matter for individual layer bed accessory or double-deck bed accessory, under preferred embodiment, the two ends in described bed length direction are provided with guardrail (namely above bed, sidepiece is provided with guardrail); Described guardrail comprises horizon bar and montant; Described horizon bar is round bar, is connected on described column by described connector.On the described crossbeam of described horizon bar and below, respectively the punching press of corresponding interval is fluted, the described perpendicular thick stick of clamping in every a pair groove.
In addition, for double-deck bed accessory, an arranged outside of described upper berth length direction has upper berth guard rail, and described cat ladder is arranged at the side of described upper berth guard rail; Described upper berth guard rail comprises montant and outer railing.Described outer railing comprises horizontal straight bar part and arc-shaped connecting rod part; The outer end of described horizontal straight bar part is connected on described column by connector; Described arc-shaped connecting rod part is connected on the described crossbeam of below by middleware; On the described crossbeam of described horizontal straight bar part and below, respectively the punching press of corresponding interval is fluted, the described perpendicular thick stick of clamping in every a pair groove.Wherein, the structure of described middleware is identical with described connecting-piece structure, but size is different, and the end coupler body of described middleware is hooked in the block button hole offered below described " G " type crossbeam.
The present invention is based on the bed accessory of connected structure, under preferred embodiment, the part that the side of described column is connected in described connector caves inward, and makes the straight portion of the clamping coupler body of described connector and the straight circular arc portion being transitioned into described column of cylinder body outer wall.
In addition, in order to ensure the stability of bed structure, the part that described connector contacts with described column is wide compared with rear side described cylindrical shell size; And the straight portion of described connector comprises grafting clamp described in upper and lower two places, corresponding described column side arranges bayonet socket described in two places.
By foregoing, present invention also offers a kind of column for connected structure bed accessory, the cross section of described column is in " C " type structure, it is arc transition in the middle part of it, dual-side is at a right angle, and each side forms right angle flanging again respectively, and forms crimp in end.
In addition, present invention also offers a kind of crossbeam forming bed for connected structure bed accessory, the cross section of crossbeam is in " G " type structure.The opposite side sealing surface of crossbeam opposed open side is provided with convex-concave rib, is used as to strengthen gusset.
Above-mentioned column and crossbeam use steel cold-reduced sheet, make section bar use by punching press, have intensity high, be convenient to the advantages such as installation.
The beneficial effect of bed accessory of the present invention is:
1, attractive in appearance, succinct, firm, durable.
Tailored appearance, refining.Column adopts arc modeling, and avoid the injury of colliding with to human body in use procedure, water caltrop have employed arc transition as far as possible, and what deducted that welding causes is ugly coarse, adds refined camber line U.S..Due to a large amount of fastnesses that make use of the triangle in mechanics principle, also have the ingenious utilization of lever, make a body become very firm.Wherein main section bar, is all the proprietary material produced without competition, can spraying inside and outside, if not being artificial damage, can using down for a long time.
2, green, environmental protection.
Owing to deliberately avoiding welding sequence, save the energy, avoid the discharge of carbon dioxide, eliminate the harm of pernicious gas to operator, simultaneously due to the minimizing of volume, to decrease in transportation unnecessary puts.
3, utilization of area rate is high.Owing to have employed advanced Sheet Metal Forming Technology, eliminate welding sequence, each parts of bed can be piled up closely, save the space of production, storehouse greatly, decrease unnecessary land seizure, only need 1/5th places of common process just can reach same production scale.
4, cost of labor is low.This kind of production only needs a small amount of ordinary skill workman, men and women all can, labour intensity is low, because of the high-tech requirement of not welding aspect, production unit is also just without the restriction of recruitment aspect.
5, cost of transportation low, install convenient in carrying.Because each parts of bed are independently, can also intert between even each parts, combine.Reduce overall volume greatly, freight only need consider weight, instead of the bulkiness of bed that common process is produced.Can the expansion sales network of maximum magnitude.
6, applied widely.This kind of is provided quality goods or brilliant in light, easy dismounting, assembling fast.Being applicable to various office, universities and colleges, collective apartment, army, even family, is different operating, life, the indispensable furniture style in recreating facility.
7, based on basic linked vector graph, polytype can be derived, as: single bed, triple bed, dormitory bed etc.Cat ladder also can adopt folded form, is convenient to action, cleaning.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of a kind of bunk bed of the present invention.
Fig. 2 is the side-looking structural representation of bunk bed shown in Fig. 1.
Fig. 3 is the plan structure schematic diagram of bed structure bed of the present invention.
Fig. 4 is the sectional structure enlarged diagram at F place in Fig. 3.
Fig. 5 is the cross bar sectional structure schematic diagram that in Fig. 3, H place forms bed.
Fig. 6 is cross bar and the vertical pole syndeton cross-sectional schematic that in Fig. 1, C place forms bed.
Fig. 7 is the decomposing schematic representation of structure shown in Fig. 6.
Fig. 8 is D place connection procedure first status architecture schematic diagram in Fig. 2.
Fig. 9 is D place connection procedure second status architecture schematic diagram in Fig. 2.
Figure 10 is connection procedure third state structural representation in D place in Fig. 2.
Figure 11 is D place connection procedure the 4th status architecture schematic diagram in Fig. 2.
Figure 12 is E place connection procedure first status architecture schematic diagram in Fig. 2.
Figure 13 is E place connection procedure second status architecture schematic diagram in Fig. 2.
Figure 14 is connection procedure third state structural representation in E place in Fig. 2.
Figure 15 is E place connection procedure the 4th status architecture schematic diagram in Fig. 2.
Figure 16 is A place connection procedure first status architecture schematic diagram in Fig. 1.
Figure 17 is A place connection procedure second status architecture schematic diagram in Fig. 1.
Figure 18 is connection procedure third state structural representation in A place in Fig. 1.
Figure 19 is B place connection procedure first status architecture schematic diagram in Fig. 1.
Figure 20 is B place connection procedure second status architecture schematic diagram in Fig. 1.
Figure 21 is connection procedure third state structural representation in B place in Fig. 1.
Figure 22 is the structure for amplifying schematic diagram at G place in Fig. 5.
Figure 23 is the structure for amplifying schematic diagram at K place in Fig. 4.
Detailed description of the invention
As Fig. 6 and 7, bunk beds shown in composition graphs 1-3, illustrate that the present invention is used for the connected structure of bed accessory, comprise the column 1 of supporting bed body, and be connected to the cross bar on column 1.In figure, cross bar is the surrounding crossbeam 2 forming bed; This cross bar also can be form guardrail horizon bar 5(Fig. 2 shown in) or form upper berth guard rail outer railing 4(Fig. 1 shown in).
As shown in Figures 6 and 7, the cross section of described column 1 is in " C " type structure, and be arc transition in the middle part of it, dual-side is at a right angle, and each side forms right angle flanging again respectively, and forms crimp 23 in end.
Described column 1 is connected by connector 8 with cross bar; Described connector 8 comprises cylindrical shell 21 and is plugged in the clamping coupler body 22 of described cylindrical shell 21 side tube port position; The hook portion that described clamping coupler body 22 comprises column 1 crimp 23 described in clasp joint and the straight portion be stuck on described column 1 one side 24.As shown in Figure 10,11,14,15, described straight portion stamps out grafting clamp 10, is plugged in the bayonet socket 9 of column 1 side 24.In addition, as shown in Figure 10,11,14,15, the end of described cross bar is inserted in the opposite side nozzle of described cylindrical shell 21, and is connected in the outer rim place of this side neck mouth after forming enlarging.
In addition, as Fig. 6,7 and Fig. 8-15 shown in, the part that the side 24 of described column 1 is connected in described connector 8 caves inward, and makes the straight portion of described clamping coupler body 22 and the straight circular arc portion being transitioned into described column 1 of cylinder body outer wall.In addition in Figure 10 and 11, the part of sunken inside extends downwards, and grafting rear connectors 8 peaks at upper end; And in Figure 14 and 15, the part of sunken inside upwards extends, grafting rear connectors 8 peaks at lower end;
In addition, as shown in Figure 10,11,14,15, the part that described connector 8 contacts with described column 1 is wide compared with rear side described cylindrical shell 21 size; And the straight portion of described connector 8 comprises grafting clamp 10 described in upper and lower two places, corresponding described column 1 side 24 arranges bayonet socket 9 described in two places.
As Figure 1-3, the invention provides a kind of two-berth bed accessory based on above-mentioned connected structure, upper bed is equipped with cat ladder 3.Be positioned at the column 1 of corner supporting bed body, its cross section is in " C " type structure, and be arc transition in the middle part of it, dual-side is at a right angle, and each side forms right angle flanging again respectively, and forms crimp 23 in end; Four root posts 1 are connected to four crossbeams 2 surrounding bed respectively by connector 8; The cross section of crossbeam 2 is in " G " type structure (as shown in Figure 5); The openend of described " C " type column 1 and " G " type crossbeam 2 is inside bed body.
Described connector 8 comprises cylindrical shell 21 and is plugged in the clamping coupler body 22 of described cylindrical shell 21 side tube port position; The hook portion that described clamping coupler body 22 comprises column 1 crimp 23 described in clasp joint and the straight portion be stuck on described column 1 one side 24; Described straight portion stamps out grafting clamp 10, is plugged in the bayonet socket 9 of described column 1 side 24.The opposite side nozzle of described cylindrical shell 21 forms the outer rim of adduction; The end of described crossbeam 2 is inserted in described setting in the nozzle of outer rim, and is connected in the outer rim place of nozzle after forming enlarging.
In addition, as shown in Figure 2, the two ends in bed length direction are provided with guardrail; Described guardrail comprises horizon bar 5 and montant 12.Described horizon bar 5 is round bar, and be connected on described column 1 by described connector 8, connection procedure as illustrated in figs. 8-11.Structure shown in approximate diagram 19-21, on the crossbeam 2 of described horizon bar 5 and below, respectively the punching press of corresponding interval is fluted, the perpendicular thick stick 12 of clamping in every a pair groove.
In Fig. 1, an arranged outside of upper berth length direction has upper berth guard rail, and cat ladder is arranged at the side of described upper berth guard rail.Described upper berth guard rail comprises montant 12 and outer railing 4; Described outer railing 4 comprises horizontal straight bar part and arc-shaped connecting rod part; The outer end of described horizontal straight bar part is connected on described column 1 by connector 8; Described arc-shaped connecting rod part is connected on the described crossbeam 2 of below by middleware 11.On the described crossbeam 2 of described horizontal straight bar part and below, respectively the punching press of corresponding interval is fluted, and in every a pair groove, the described perpendicular thick stick 12(of clamping as shown in figs. 19-21).Wherein, the structure of described middleware 11 and described connector 8 structure proximate, the end coupler body of described middleware 11 is hooked in the block button hole 7 offered below described " G " type crossbeam 2 (as Figure 16-18, the label 7 in composition graphs 3 illustrates).
In addition, as Figure 4 and 5, and the formation structure of bed shown in Figure 22,23, support bar 6 inserts in " G " type mouth of both sides " G " type crossbeam 2, and realizes being located by connecting by the spill snap-fit engagement in Figure 23.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (8)
1., for a connected structure for bed accessory, comprise the column (1) of supporting bed body, and be connected to the cross bar on column (1); It is characterized in that,
The cross section of described column (1) is in " C " type structure, and be arc transition in the middle part of it, dual-side is at a right angle, and each side forms right angle flanging again respectively, and forms crimp (23) in end;
Described column (1) is connected by connector (8) with cross bar; Described connector (8) comprises cylindrical shell (21) and is plugged in the clamping coupler body (22) of described cylindrical shell (21) side tube port position; The hook portion that described clamping coupler body (22) comprises column described in clasp joint (1) crimp (23) and the straight portion be stuck on described column (1) side (24); Described straight portion stamps out grafting clamp (10), is plugged in the bayonet socket (9) of described column (1) side (24);
The end of described cross bar is inserted in the opposite side nozzle of described cylindrical shell (21), and is connected in nozzle outer rim place after forming enlarging.
2. according to claim 1 for the connected structure of bed accessory, it is characterized in that, the part that the side (24) of described column (1) is connected in described connector (8) caves inward, and makes the straight portion of described clamping coupler body (22) and the straight circular arc portion being transitioned into described column (1) of cylinder body outer wall.
3. according to claim 2 for the connected structure of bed accessory, it is characterized in that, the part that described connector (8) contacts with described column (1) is wide compared with the described cylindrical shell of rear side (21) size; And the straight portion of described connector (8) comprises grafting clamp (10) described in upper and lower two places, corresponding described column (1) side (24) is arranged bayonet socket (9) described in two places.
4. the bed accessory based on connected structure, comprise the column (1) laying respectively at corner supporting bed body, it is characterized in that, the cross section of described column (1) is in " C " type structure, it is arc transition in the middle part of it, dual-side is at a right angle, and each side forms right angle flanging again respectively, and forms crimp (23) in end;
Described four root posts (1) are connected to four crossbeams (2) surrounding bed respectively by connector (8); " C " type openend of described column (1) is inside bed body;
Described connector (8) comprises cylindrical shell (21) and is plugged in the clamping coupler body (22) of described cylindrical shell (21) side tube port position; The hook portion that described clamping coupler body (22) comprises column described in clasp joint (1) crimp (23) and the straight portion be stuck on described column (1) side (24); Described straight portion stamps out grafting clamp (10), is plugged in the bayonet socket (9) of described column (1) side (24);
The end of described crossbeam (2) is inserted in the opposite side nozzle of described cylindrical shell (21), and is connected in the outer rim place of nozzle after forming enlarging.
5. according to claim 4 based on the bed accessory of connected structure, it is characterized in that, above described bed, sidepiece is provided with guardrail; Described guardrail comprises horizon bar (5) and montant (12);
Described horizon bar (5) is round bar, is connected on described column (1) by described connector (8);
The described crossbeam (2) of described horizon bar (5) and below is upper that the punching press of corresponding interval is fluted respectively, clamping described montant (12) in every a pair groove.
6. according to claim 4 or 5 based on the bed accessory of connected structure, it is characterized in that, the cross section of described crossbeam (2) is in " G " type structure; " G " type openend of described crossbeam (2) is inside bed body, and midfoot support bar (6) inserts in the G type mouth of the described crossbeam (2) of both sides.
7. according to claim 6 based on the bed accessory of connected structure, it is characterized in that, the part that the side (24) of described column (1) is connected in described connector (8) caves inward, and makes the straight portion of the clamping coupler body (22) of described connector (8) and the straight circular arc portion being transitioned into described column (1) of cylinder body outer wall;
The part that described connector (8) contacts with described column (1) is wide compared with the described cylindrical shell of rear side (21) size; And the straight portion of described connector (8) comprises grafting clamp (10) described in upper and lower two places, corresponding described column (1) side (24) is arranged bayonet socket (9) described in two places.
8. according to claim 7 based on the bed accessory of connected structure, it is characterized in that, comprise the two-layer bed supported by described column (1), upper bed is equipped with cat ladder (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210407329.0A CN102960978B (en) | 2012-10-23 | 2012-10-23 | Plug structure for bed and plug structure-based bedding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210407329.0A CN102960978B (en) | 2012-10-23 | 2012-10-23 | Plug structure for bed and plug structure-based bedding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102960978A CN102960978A (en) | 2013-03-13 |
| CN102960978B true CN102960978B (en) | 2015-04-22 |
Family
ID=47791629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210407329.0A Expired - Fee Related CN102960978B (en) | 2012-10-23 | 2012-10-23 | Plug structure for bed and plug structure-based bedding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102960978B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114410A (en) * | 2015-09-08 | 2015-12-02 | 扬州市康宇实业有限公司 | Buckle insertion connector and application thereof |
| CN110406770A (en) * | 2019-06-19 | 2019-11-05 | 厦门新技术集成有限公司 | A kind of splicing construction between pin-connected panel containing box and its adjacent side plates |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4966424A (en) * | 1988-05-05 | 1990-10-30 | W. Schneider & Co., Ag Metallwarenfabrik | Cabinet construction |
| EP0857609A1 (en) * | 1997-02-05 | 1998-08-12 | Valeo Vision | Capsule with damping device for mounting a mirror in a vehicle headlamp housing |
| US6314595B1 (en) * | 2000-03-09 | 2001-11-13 | Joel Price | Interlocking bed frame with integrated ladder and safety rail systems |
| CN2906169Y (en) * | 2006-03-06 | 2007-05-30 | 杨云 | Profiled double-deck iron bed fastener |
| CN201293017Y (en) * | 2008-11-12 | 2009-08-19 | 李明 | Column-beam connector for composite steel bed |
| CN201356299Y (en) * | 2008-12-31 | 2009-12-09 | 林建耀 | Novel clamping type steel bed |
| CN201591355U (en) * | 2009-10-24 | 2010-09-29 | 张新生 | Completely assembled/disassembled student bed with desk function |
| CN202301326U (en) * | 2011-09-12 | 2012-07-04 | 高德伟 | T-shaped folding fastener for butt joint of circular pipes |
| CN202335634U (en) * | 2011-11-03 | 2012-07-18 | 杨阅军 | Novel combined bed |
| CN203016367U (en) * | 2012-10-23 | 2013-06-26 | 徐华玉 | Splicing structure for bed, bed based on splicing structure and stand column of bed |
-
2012
- 2012-10-23 CN CN201210407329.0A patent/CN102960978B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4966424A (en) * | 1988-05-05 | 1990-10-30 | W. Schneider & Co., Ag Metallwarenfabrik | Cabinet construction |
| EP0857609A1 (en) * | 1997-02-05 | 1998-08-12 | Valeo Vision | Capsule with damping device for mounting a mirror in a vehicle headlamp housing |
| US6314595B1 (en) * | 2000-03-09 | 2001-11-13 | Joel Price | Interlocking bed frame with integrated ladder and safety rail systems |
| CN2906169Y (en) * | 2006-03-06 | 2007-05-30 | 杨云 | Profiled double-deck iron bed fastener |
| CN201293017Y (en) * | 2008-11-12 | 2009-08-19 | 李明 | Column-beam connector for composite steel bed |
| CN201356299Y (en) * | 2008-12-31 | 2009-12-09 | 林建耀 | Novel clamping type steel bed |
| CN201591355U (en) * | 2009-10-24 | 2010-09-29 | 张新生 | Completely assembled/disassembled student bed with desk function |
| CN202301326U (en) * | 2011-09-12 | 2012-07-04 | 高德伟 | T-shaped folding fastener for butt joint of circular pipes |
| CN202335634U (en) * | 2011-11-03 | 2012-07-18 | 杨阅军 | Novel combined bed |
| CN203016367U (en) * | 2012-10-23 | 2013-06-26 | 徐华玉 | Splicing structure for bed, bed based on splicing structure and stand column of bed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102960978A (en) | 2013-03-13 |
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