CN212938979U - Adjustable smooth stealthy bed - Google Patents

Abstract

The utility model relates to an adjustable and flat invisible bed, which comprises a bed box, a bed body and a rotating device, wherein the bed body comprises a bed frame side lever used for connecting the bed head and the bed tail of the bed body, the rotating device comprises an outer toothed nut, a main bolt is arranged in the outer toothed nut through threads, and a bed head sleeve is fixedly sleeved on the part of the main bolt positioned outside the outer toothed nut; the bed frame side lever is vertically and rotatably arranged on the bed head sleeve, the bed tail sleeve is arranged at one end of the bed frame side lever close to the bed tail, and the bookshelf connecting plate is fixedly arranged on the bed tail sleeve; the bed head sleeve is fixedly provided with a bed head connecting piece, the bed tail sleeve is fixedly provided with a bed tail connecting piece, a linkage rod is rotatably connected between the bed head connecting piece and the bed tail connecting piece, and the bed head sleeve is provided with a fine adjustment block. It is low to the machining precision demand, can solve the bookshelf connecting plate of tailstock and can't laminate closely problem with ground through adjusting after the installation.

Description

Adjustable smooth stealthy bed

Technical Field

The utility model belongs to the technical field of stealthy bed's technique and specifically relates to an adjustable smooth stealthy bed is related to.

Background

With the development of times, urban population is more and more, and living space is also smaller and smaller. When the living space is small, if the traditional furniture is placed, because the traditional furniture has single use, a bed necessary for life often occupies a large indoor space, so that the room is too crowded, the space where people can move is correspondingly reduced, and the living comfort is influenced. People often use invisible beds to replace the current common beds. The invisible bed generally comprises a bed box and a bed body rotatably arranged in the bed box, when the bed body is turned over from the bed box, one end of the bed body close to the bed box is a bed head, and one end of the bed body far away from the bed box is a bed tail.

For example, the Chinese patent CN209031609U discloses a vertical turning type hidden bed with a bookshelf, which relates to the technical field of furniture; the bookshelf comprises a storage rack, a side fixing plate, a bookshelf horizontal push-pull rod, a bedstead side pipe, a rotating shaft screw, a bed body, a bookshelf connecting plate and a bookshelf; the storage rack is fixedly connected with the side fixing plate, the side tube of the bed frame, the side fixing plate, the horizontal push-pull rod of the bookshelf and the bookshelf connecting plate are sequentially hinged and hinged end to end through a rotating shaft screw and a bushing to form a parallel four-bar structure, and the bushing is sleeved on the rotating shaft screw; the side tube of the bed frame is fixedly connected with the bed body, and the bookshelf connecting plate is fixedly connected with the bookshelf. It can guarantee that the bookshelf is always in a horizontal state in the turning process of the bed frame. However, during actual production, the length of the horizontal push-pull rod of the bookshelf has more or less errors, when the horizontal push-pull rod of the bookshelf is installed well, and the bed body is turned over to be in a horizontal state, the bookshelf connecting plate connected to the bed body cannot be well attached to the ground, one end of the bookshelf connecting plate is high, the other end of the bookshelf connecting plate is low, the bed tail is uneven, and the use experience of people is affected. Although this problem can be solved by improving the machining precision of the horizontal push-pull rod of the bookshelf, this will greatly increase the production cost of the invisible bed. Therefore, an invisible bed which has low processing precision requirement and can solve the problem that the bookshelf connecting plate at the tail of the bed cannot be tightly attached to the ground is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an adjustable and smooth stealthy bed, its machining precision demand is low, but can solve the stealthy bed of the inseparable problem of bookshelf connecting plate of tailstock can't laminate with ground.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

an adjustable and flat invisible bed comprises a bed box, a bed body rotationally mounted in the bed box and a rotating device for connecting the bed box and the bed body, wherein the bed body comprises a bed frame side lever for connecting a bed head and a bed tail of the bed body; the bed frame side lever is vertically and rotatably arranged on the bed head sleeve, one end of the bed frame side lever close to the bed tail is rotatably provided with a bed tail sleeve parallel to the bed head sleeve, and the bookshelf connecting plate is fixedly arranged on the bed tail sleeve; the bed head sleeve is fixedly provided with a bed head connecting piece, the bed tail sleeve is fixedly provided with a bed tail connecting piece, the bed head connecting piece and the bed tail connecting piece have the same structure, a linkage rod is rotatably connected between the bed head connecting piece and the bed tail connecting piece, the rotating axes at the two ends of the linkage rod are parallel to the axes of the main bolts, the linkage rod is parallel to a side lever of the bed frame, the distance between one end of the linkage rod connected with the bed head connecting piece and one end connected with the bed tail connecting piece is equal to the distance between the bed head sleeve and the bed tail sleeve, the rotating shaft at one end of the linkage rod connected with the bed head connecting piece is positioned at the upper, install the fine setting piece on head of a bed sleeve, the fine setting piece is for head of a bed sleeve rigidity, and fixed mounting has the positioning welding piece on the inside wall of bed case, and the last detachable of positioning welding piece is installed and is used for the fine setting piece in location and make the fine setting piece keep the holding screw fixed.

Through adopting above-mentioned technical scheme, the bed body rotates and installs in the bed case, because the bedstead side lever of the bed body rotates and installs on the head of a bed sleeve, the bed body can be along the convenient rotation of kingbolt's axis. Because head of a bed connecting piece, gangbar, tailstock connecting piece and bedstead side lever rotate in proper order and connect, head of a bed connecting piece and tailstock connecting piece structure are the same, and the distance between head of a bed sleeve and the tailstock sleeve on gangbar both ends and the bedstead side lever equals, and the gangbar is parallel with the bedstead side lever, makes the head of a bed connecting piece, gangbar, tailstock connecting piece and the bedstead side lever that connect gradually form a structure similar to parallelogram. Because the bedside connector is fixedly mounted on the bedside sleeve, the positions of the bedside sleeve and the main bolt relative to the bed box are kept unchanged, namely the position of the bedside connector is kept unchanged, so that one side of the parallelogram is kept unchanged. When people rotate the bed body, the other three edges of the parallelogram move along with the bed body. Because the position and the shape of the bed head connecting piece are kept unchanged, the bed tail connecting piece and the bed tail sleeve are in a translation state when moving, and the bookshelf connecting plate is fixedly arranged on the bed tail sleeve, so that the bookshelf connecting plate also translates along with the bed tail sleeve. When the bookshelf is used by people, the bookshelf connecting plates are adjusted in advance to keep the bookshelf connecting plates in a horizontal state. When the bed body is rotated subsequently, the bookshelf between the bookshelf connecting plates is always in a horizontal state.

Because fine-tuning piece and head of a bed sleeve are fixed relatively, the head of a bed sleeve is fixed the cover and is established on the kingbolt, and the kingbolt is again through the screw thread installation in outer thread nut to when adjusting fine-tuning piece, the kingbolt can twist in or unscrew outer thread nut, drives the head of a bed sleeve and rotates. When the bed head sleeve rotates, the position of the bed head connecting piece fixedly installed on the bed head sleeve also rotates along with the bed head sleeve, so that the angle of the bed tail connecting piece can be adjusted. When people rotate the bed body to turn out the bed body from the bed box, if the bookshelf connecting plate at the tail of the bed cannot be tightly attached to the ground, the position of the fine adjustment block can be adjusted until the bookshelf connecting plate fixedly arranged on the bed tail connecting piece can be well attached to the ground. Such structure is low to the machining precision demand, can be after installing, through adjusting the bookshelf connecting plate that solves the tailstock and can't laminate closely problem with ground.

The present invention may be further configured in a preferred embodiment as: the fine-tuning block on be fixed and be provided with the adjustment lug, the fixed position welding piece includes first welding piece, wears to be equipped with on the first welding piece and supports tight bolt, support the one end and the adjustment lug butt of tight bolt, support tight bolt and can remove for first welding piece along its axis to promote the adjustment lug, drive the fine-tuning block and rotate, holding screw on the first welding piece is used for supporting and supports tight bolt, and makes and support tight bolt and keep fixed.

Through adopting above-mentioned technical scheme, the workman can unscrew holding screw when adjusting to make to support the bolt and can rotate, then stir the adjustment lug and adjust, after adjusting big position, rotatory support the bolt and finely tune, until the bookshelf connecting plate that makes the tailstock is inseparable with ground laminating, later screw up holding screw can. Which can be well adjusted by workers.

The present invention may be further configured in a preferred embodiment as: the fine-tuning piece be gear shape, the axis of fine-tuning piece and kingbolt's axis collineation, the positioning and welding piece includes second welding piece, the holding screw that wears to establish on the second welding piece is provided with the side butt of tooth with the fine-tuning piece.

Through adopting above-mentioned technical scheme, after adjusting the fine setting piece through holding screw on the first welding piece, screw up the holding screw on the second welding piece, make this holding screw and fine setting piece butt, and then further fix the position of fine setting piece. And because the outside of fine setting piece is provided with the tooth, can be fine with holding screw interlock, make the fine setting piece be difficult to the phenomenon that the position is not hard up to deviate that appears more.

The present invention may be further configured in a preferred embodiment as: the adjustment lug be located the top of fine setting piece, first welding piece is located the upside of adjustment lug, and is located the one side that the head of a bed was kept away from to the adjustment lug.

Through adopting above-mentioned technical scheme, with the upside of first welding piece setting at the adjustment lug and the one side of keeping away from the head of a bed, the workman can observe the adjustment lug more easily in the maintenance, is convenient for adjust.

The present invention may be further configured in a preferred embodiment as: the second welding block is positioned at the lower side of the fine adjustment block and is positioned at one side of the adjustment lug, which is far away from the bed head.

Through adopting above-mentioned technical scheme, the second welding piece sets up the downside at the fine setting piece, staggers with first welding piece position to the same one side of keeping away from the head of a bed at the fine setting piece that sets up, the workman of being convenient for is at the adjustment fine setting piece of maintenance and installation.

The present invention may be further configured in a preferred embodiment as: head of a bed connecting piece and tailstock connecting piece all include the welding grip block of two perpendicular to main bolts, the lower extreme fixed mounting of welding grip block is on head of a bed sleeve or tailstock sleeve, the fixed extension welded plate that is provided with in upper end of welding grip block, the extension welded plate setting is in the one side that the welding grip block is close to the head of a bed, and the both ends fixed connection of gangbar is on the extension welded plate of head of a bed connecting piece and the extension welded plate of tailstock connecting piece.

Through adopting above-mentioned technical scheme, be the both ends that the extension welded plate on the welded clamp plate gripped the gangbar through welding the grip block with an organic whole, make the gangbar keep steady in the pivoted, whole bed body is more smooth in the pivoted, makes the bookshelf connecting plate of the bed body afterbody can remain stable.

The present invention may be further configured in a preferred embodiment as: the side lever of the bed frame is of a hollow structure, and the linkage rod, the bed head connecting piece and the bed tail connecting piece are all installed in the side lever of the bed frame.

Through adopting above-mentioned technical scheme, all accomodate gangbar, head of a bed connecting piece and tailstock connecting piece in the bedstead side lever, it does not influence the rotation of gangbar, head of a bed connecting piece, tailstock connecting piece and bedstead side lever, and whole bed body is more clean and tidy, when people lay bedding such as bed clothes, mattress to the bed body, the bedding is not easy and gangbar, head of a bed connecting piece and tailstock connecting piece mutual interference. The linkage rod, the bed head connecting piece and the bed tail connecting piece are well protected.

The present invention may be further configured in a preferred embodiment as: the cross sections of the bed head sleeve and the bed tail sleeve are all round-angle rectangles.

Through adopting above-mentioned technical scheme, head of a bed sleeve and tailstock sleeve all rotate to be installed on the bedstead side lever, and head of a bed connecting piece, tailstock connecting piece and bookshelf connecting plate are fixed mounting again on head of a bed sleeve or tailstock sleeve. In order to facilitate production, the bed head sleeve and the bed tail sleeve are both arranged into a structure with a round-corner rectangular cross section, and four corners of the structure are round corners, so that the structure is convenient to install in round holes of bearings and the like. If some objects are required to be fixedly arranged on the bed head sleeve and the bed tail sleeve, square holes can be formed in the objects. The structure is simpler and is convenient to install.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the requirement on the machining precision is low, and the problem that a bookshelf connecting plate at the tail of a bed cannot be tightly attached to the ground can be solved through adjustment after the bookshelf connecting plate is installed;

2. the structure is simpler and the installation is convenient.

Drawings

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

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic view of the structure of the sleeve of the head of a bed.

Fig. 4 is a schematic view of another perspective of the sleeve construction of the headpiece.

Fig. 5 is a schematic view of the structure of the tailstock sleeve.

In the figure, 1, a bed box; 2. a bed body; 21. a bed frame body; 22. a head bar; 23. a bed tail rod; 24. a side lever of the bedstead; 3. a rotating device; 31. an outer thread nut; 32. a main bolt; 33. a bedside sleeve; 34. a bed tail sleeve; 35. a bookshelf connecting plate; 4. a bed head connecting piece; 41. a bed tail connector; 42. welding the clamping plate; 43. welding the clamping hole; 44. lengthening the welding plate; 45. connecting a bolt; 46. a linkage rod; 5. fine tuning blocks; 51. fine tuning the pores; 52. adjusting the bump; 53. positioning a welding block; 531. a first welding block; 532. a second welding block; 54. an abutment bolt; 55. and (5) tightening the screw.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses an adjustable and smooth stealthy bed, including bed case 1, be provided with the opening on the front of bed case 1, and install the bed body 2 at the opening internal rotation. The bed body 2 comprises a bed frame body 21, the bed frame body 21 comprises a head rod 22, a tail rod 23 and a bed frame side rod 24, two ends of the bed frame side rod 24 are respectively connected with one end of the head rod 22 and one end of the tail rod 23, and a rotating device 3 used for connecting the bed body 2 is further arranged in the bed box 1.

Referring to fig. 1 and 2, the turning devices 3 are mounted one on each of the vertical sides of the inside of the bed box 1. The rotating device 3 comprises an outer threaded nut 31, and the outer threaded nut 31 is fixedly arranged on the inner side wall of the bed box 1. A main bolt 32 (shown in fig. 3) is threadedly mounted in the outer nut 31, and one end of the main bolt 32 is positioned outside the outer nut 31. The main bolt 32 is fixedly provided with a bedside sleeve 33 through threads, the main bolt 32 penetrates through the bedside sleeve 33, the axes of the two bedside sleeves 33 on the inner side of the bed box 1 are collinear, and the cross section of the bedside sleeve 33 is in a round-corner rectangle shape. Two bearing seats are fixedly arranged at one end of the bedstead side rod 24 close to the bedside rod 22, bearings are fixedly arranged in the bearing seats, the rotating axes of the two bearings are collinear, and the bedside sleeve 33 is arranged in the bearings in a penetrating way. Two bearing seats are also fixedly arranged at one end of the bedstead side rod 24 close to the tailstock rod 23, bearings are arranged in the bearing seats, tailstock sleeves 34 (shown in figure 4) penetrate through the bearings of the bearing seats, and the cross section of each tailstock sleeve 34 is in a round rectangle shape. A bookshelf connecting plate 35 is fixedly mounted on the bed tail sleeve 34, and the bookshelf connecting plate 35 is arranged on one side of the two side frames 24 away from each other.

Referring to fig. 3 and 4, the side frame rods 24 are hollow, the head connectors 4 are fixedly mounted on the head sleeves 33, and as shown in fig. 5, the foot connectors 41 are fixedly mounted on the foot sleeves 34, and the head connectors 4 and the foot connectors 41 are both located inside the side frame rods 24. The bedside connecting piece 4 comprises two welding clamping plates 42 perpendicular to the bedside sleeve 33, the lower end of each welding clamping plate 42 is provided with a welding clamping hole 43 with the same cross section as that of the bedside sleeve 33, and the bedside sleeve 33 penetrates through the welding clamping hole 43. The two welding clamping plates 42 are fixedly connected together through a connecting piece, and a gap is formed between the two welding clamping plates 42. The side surface of the upper end of the welding clamping plate 42 close to the bed head rod 22 is integrally provided with an elongated welding plate 44, and the two elongated welding plates 44 are vertically provided with connecting bolts 45 in a penetrating way. The bed end connector 41 and the bed head connector 4 are identical in structure. A linkage rod 46 is connected between the head connector 4 and the foot connector 41, two ends of the linkage rod 46 are respectively positioned between the head connector 4 and the lengthened welding plate 44 of the foot connector 41, and two ends of the linkage rod 46 are both penetrated by a connecting bolt 45. The axes of the linkage rods 46 are parallel to the axes of the side rods 24, and the distance between the connecting pins 45 at the two ends of the linkage rods 46 is equal to the distance between the head sleeve 33 and the tail sleeve 34.

Referring to fig. 3 and 4, a fine adjustment block 5 is fixedly mounted on the bedside sleeve 33, the fine adjustment block 5 is in a gear shape, a fine adjustment hole 51 with a cross section equal to the cross section of the bedside sleeve 33 is formed in the center of the fine adjustment block 5, the bedside sleeve 33 is arranged in the fine adjustment hole 51 in a penetrating manner, and an adjustment convex block 52 is integrally formed at the top of the fine adjustment block 5. The side surface of the bed box 1, which is provided with the outer thread nut 31, is fixedly provided with a positioning welding block 53, and the positioning welding block 53 is positioned on one side of the fine adjustment block 5, which is far away from the bed head. The tack weld block 53 includes a first weld block 531 and a second weld block 532, the first weld block 531 being higher than the vernier block 5, and the second weld block 532 being lower than the vernier block 5. A fastening bolt is inserted into the first welding block 531, and one end of the fastening bolt abuts against the adjustment protrusion 52. A set screw 55 is inserted through the bottom surface of the first welding block 531, and the set screw 55 can abut against the abutting bolt to keep the abutting bolt in a fixed state. A set screw 55 is also inserted into the second welding block 532, and the set screw 55 can abut against the side surface of the fine adjustment block 5 provided with teeth to hold the fine adjustment block 5 in a fixed state.

The implementation principle of the embodiment is as follows: the bed body 2 is rotatably arranged in the bed box 1, the bed frame side lever 24 of the bed body 2 is rotatably arranged on the bed head sleeve 33, and the bed body 2 can conveniently rotate along the axis of the main bolt 32. The bed head connecting piece 4, the linkage rod 46, the bed tail connecting piece 41 and the bed frame side rod 24 are sequentially connected in a rotating mode, the bed head connecting piece 4 and the bed tail connecting piece 41 are identical in structure, the distance between the two ends of the linkage rod 46 and the bed head sleeve 33 and the distance between the two bed tail sleeve 34 on the bed frame side rod 24 are equal, and the linkage rod 46 is parallel to the bed frame side rod 24, so that the bed head connecting piece 4, the linkage rod 46, the bed tail connecting piece 41 and the bed frame side rod 24 which are sequentially connected form a structure similar to a parallelogram. Because the bedside attachment 4 is fixedly mounted on the bedside sleeve 33, the position of the bedside sleeve 33 and the main bolt 32 relative to the bed box 1 remains unchanged, i.e. the position of the bedside attachment 4 remains unchanged, leaving one side of the parallelogram unchanged. When people rotate the bed body 2, the other three sides of the parallelogram move along with the bed body. Because the position and shape of the head end connector 4 remains unchanged, the foot end connector 41 and foot end sleeve 34 are translated when moved. Because the bookshelf connecting plate 35 is fixedly arranged on the bed tail sleeve 34, the bookshelf connecting plate 35 can also move horizontally along with the bed tail sleeve 34. The bookshelf connecting plates 35 are adjusted in advance, so that the bookshelf connecting plates 35 are kept in a horizontal state.

Because fine setting piece and head of a bed sleeve are fixed relatively, the fixed cover of head of a bed sleeve is established on the kingbolt, and the kingbolt is again through the screw thread installation in outer thread nut to when adjusting fine setting piece, the kingbolt can twist into or twist out outer thread nut, drives the head of a bed sleeve and rotates. When the bed head sleeve rotates, the position of the bed head connecting piece fixedly installed on the bed head sleeve also rotates along with the bed head sleeve, so that the angle of the bed tail connecting piece can be adjusted. When people rotate the bed body to turn out the bed body from the bed box, if the bookshelf connecting plate at the tail of the bed cannot be tightly attached to the ground, the position of the fine adjustment block can be adjusted until the bookshelf connecting plate fixedly arranged on the bed tail connecting piece can be well attached to the ground. Such structure is low to the machining precision demand, can be after installing, through adjusting the bookshelf connecting plate that solves the tailstock and can't laminate closely problem with ground.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides an adjustable smooth stealthy bed, includes bed case (1), rotates the rotating device (3) of installing bed body (2) in bed case (1) and connecting bed case (1) and bed body (2), bed body (2) including being used for connecting the bed head of bed body (2) and bedstead side lever (24) of tailstock, its characterized in that: the rotating device (3) comprises an outer threaded nut (31), the outer threaded nut (31) is fixedly installed on the inner side wall of the bed box (1), a main bolt (32) is installed in the outer threaded nut (31) through threads, one end of the main bolt (32) is located on the outer side of the outer threaded nut (31), and a bed head sleeve (33) is fixedly sleeved on the part, located on the outer side of the outer threaded nut (31), of the main bolt (32); the bed frame side lever (24) is vertically and rotatably arranged on the bed head sleeve (33), one end of the bed frame side lever (24) close to the bed tail is rotatably provided with a bed tail sleeve (34) parallel to the bed head sleeve (33), and the bookshelf connecting plate (35) is fixedly arranged on the bed tail sleeve (34); a bed head connecting piece (4) is fixedly arranged on the bed head sleeve (33), a bed tail connecting piece (41) is fixedly arranged on the bed tail sleeve (34), the bed head connecting piece (4) and the bed tail connecting piece (41) have the same structure, a linkage rod (46) is rotatably connected between the bed head connecting piece (4) and the bed tail connecting piece (41), the rotating axes of two ends of the linkage rod (46) are parallel to the axis of the main bolt (32), the linkage rod (46) is parallel to the side rod (24) of the bed frame, the distance between one end of the linkage rod (46) connected with the bed head connecting piece (4) and one end connected with the bed tail connecting piece (41) is equal to the distance between the bed head sleeve (33) and the bed tail sleeve (34), the rotating shaft of one end of the linkage rod (46) connected with the bed head connecting piece (4) is positioned at the upper side of the main bolt (32) and positioned at one side of the main bolt (32) close to the bed, fine setting piece (5) are fixed for head of a bed sleeve (33) position, and fixed mounting has positioning welding piece (53) on the inside wall of bed case (1), and detachable installation is used for positioning fine setting piece (5) and makes fine setting piece (5) keep fixed holding screw (55) on positioning welding piece (53).

2. The adjustable and flat invisible bed as claimed in claim 1, wherein: the fine setting piece (5) on the fixed adjustment lug (52) that is provided with, positioning welding piece (53) are including first welding piece (531), wear to be equipped with on first welding piece (531) and support tight bolt, support the one end and the adjustment lug (52) butt of tight bolt, support tight bolt and can remove for first welding piece (531) along its axis to promote adjustment lug (52), drive fine setting piece (5) and rotate, holding screw (55) on first welding piece (531) are used for supporting and support tight bolt, and make and support tight bolt and keep fixed.

3. An adjustable and flat invisible bed as claimed in claim 2, wherein: vernier block (5) be gear shape, the axis of vernier block (5) and the axis collineation of kingbolt (32), positioning and welding piece (53) are including second welding piece (532), set screw (55) and vernier block (5) of wearing to establish on second welding piece (532) are provided with the side butt of tooth.

4. An adjustable and flat invisible bed according to claim 3, characterized in that: the adjusting lug (52) is positioned above the fine adjusting block (5), and the first welding block (531) is positioned on the upper side of the adjusting lug (52) and is positioned on one side of the adjusting lug (52) far away from the bed head.

5. An adjustable and flat invisible bed according to claim 4, characterized in that: the second welding block (532) is positioned at the lower side of the fine adjustment block (5) and is positioned at one side of the adjustment lug (52) far away from the head of the bed.

6. The adjustable and flat invisible bed as claimed in claim 1, wherein: head of a bed connecting piece (4) and tailstock connecting piece (41) all include welding grip block (42) of two perpendicular to main bolt (32), the lower extreme fixed mounting of welding grip block (42) is on head of a bed sleeve (33) or tailstock sleeve (34), the fixed extension welded plate (44) that is provided with in upper end of welding grip block (42), extension welded plate (44) set up the one side that is close to the head of a bed in welding grip block (42), and the both ends fixed connection of gangbar (46) is on extension welded plate (44) of the extension welded plate (44) of head of a bed connecting piece (4) and the extension welded plate (44) of tailstock connecting piece (41).

7. The adjustable and flat invisible bed as claimed in claim 1, wherein: the bed frame side rods (24) are of hollow structures, and the linkage rods (46), the bed head connecting piece (4) and the bed tail connecting piece (41) are all installed in the bed frame side rods (24).

8. The adjustable and flat invisible bed as claimed in claim 1, wherein: the cross sections of the bed head sleeve (33) and the bed tail sleeve (34) are all round-angle rectangles.

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