CN108523444B - Reversible desk and combination of desk and chair - Google Patents

Abstract

The invention discloses a reversible desk and a desk and chair combination thereof, which comprises desk legs, drawers and a desk top, wherein the desk legs are connected to two sides of the drawers through a four-bar mechanism consisting of a first fixing plate, a first connecting rod, a second connecting rod and a third connecting rod, the first fixing plate is provided with a first sliding groove, a first limiting nail is arranged on the first connecting rod, a limiting block is arranged below the third connecting rod on the first fixing plate, the drawers are fixed on the second connecting rod, a limiting opening is arranged on the second connecting rod, a locking device is arranged on the first connecting rod, the locking opening is arranged on the first fixing plate, the drawers are connected with the desk legs through the four-bar mechanism, so that the desk top can swing along with the four-bar mechanism, the inclination and the water leveling adjustment of the desk top are realized, the desk top is adjusted to be inclined, a middle and primary school students can lean on or lie on the desk top to sleep, the middle school students can also use with a sleeping pad, the uncomfortable problem caused by that the middle school students can only lie on the middle school students can be prone to the desk, and the middle school students can improve the quality of the middle school students can be improved.

Description

Reversible desk and combination of desk and chair

Technical Field

The invention relates to the field of articles for daily use, in particular to a reversible desk, and also relates to a desk and desk-chair combination.

Background

The desk and the chair are necessary teaching equipment for schools. The traditional desk is generally composed of a desktop, desk legs and drawers, wherein the desktop is fixed on the desk legs, the desktop cannot be inclined, students are required to have noon break in middle and primary schools, the students can only lie on the desk, and the head presses the arms to have noon break, so that a lot of discomfort is brought to the body, the time is long, the students often suffer from arm tingling, neck soreness and distention and waist soreness back pain, and especially the students with too high or too low children are more serious in inadequacy; in order to meet the comfort level of students with different heights, the students have a good posture during noon break, the noon break comfort level is increased, a desk capable of increasing the noon break comfort level is very necessary to design, so that each student sits on the desk and chair and feels proper in height, the students are very comfortable, the students do not need to press the arms with the heads during noon break, the noon break comfort level is increased, the phenomena of arm tingling, neck soreness and backache are eliminated, and the children can learn happily and grow healthily.

It can be seen that there is a need for improvements and improvements in the art.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention aims to provide a reversible desk and a combination of the reversible desk and a desk chair, which aims to solve the problem that in the prior art, students in middle and primary schools can only lie on the desk to cause discomfort; another aim is to prevent the school desk and the school desk chair from sliding during afternoon nap.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the utility model provides a desk can overturn, includes table leg, drawer and desktop, the desktop is fixed in the top of drawer and is even integrative, the table leg is two and is arranged in respectively the drawer both sides, the first fixed plate of table leg fixedly connected with, first fixed plate upper end is equipped with first spout, be connected with first connecting rod on the first fixed plate, be equipped with on the first connecting rod with first spout complex first spacing nail, the other end of first connecting rod is connected with the second connecting rod, the other end of second connecting rod is connected with the third connecting rod, the other end of third connecting rod rotates with the lower extreme of first fixed plate to be connected, and first fixed plate is provided with the stopper to the third connecting rod is spacing in the below of third connecting rod, the drawer is fixed on the second connecting rod, and be equipped with the spacing mouth with first spacing nail lock on the second connecting rod, be equipped with locking device on the first connecting rod, correspond desktop level and incline position respectively and be provided with the locking mouth with locking device complex on the first connecting rod.

In the desk of can overturning, locking device including fixing the unlocking device in desktop below drawer inside, fix the latch fitting on first connecting rod, connect latch fitting and unlocking device's haulage rope, unlocking device includes first shell, forms the second spout in the first shell, installs the gleitbretter on the second spout, the one end and the haulage rope of gleitbretter are connected, the latch fitting includes the second shell, forms the third spout in the second shell, installs the locking plate on the third spout, the second shell is worn out to the one end of locking plate, the other end of locking plate is equipped with the boss, this boss is connected with the haulage rope to be equipped with compression spring in the outside of boss, compression spring one end and the inner wall butt of second shell, the other end and locking plate butt.

In the reversible desk, a through hole is formed in the second shell, a second limiting nail is arranged on the through hole, and a limiting groove matched with the second limiting nail is formed in the locking plate.

In the reversible desk, a protective cover plate is fixed on one side surface of the desk leg far away from the drawer.

In the turnover desk, the lower ends of the desk legs are provided with auxiliary rods connected with the two desk legs, and the auxiliary rods are provided with supporting plates.

In the reversible desk, a first supporting plate is fixedly connected to the lower portion of each desk leg, the first supporting plate and the desk legs form an inverted T shape, and a first vacuum sucker and a desk foot rubber pad are respectively arranged below two ends of the first supporting plate.

The utility model provides a desk and desk chair combination, includes can overturn desk, still includes desk chair, and this desk chair includes seat and chair foot, chair foot below fixedly connected with second backup pad, second backup pad and chair foot constitute and fall the T shape, are equipped with second vacuum chuck and chair foot cushion in the below at second backup pad both ends, be equipped with detachable connecting piece between second backup pad and the first backup pad.

In the desk and desk chair combination, the terminal surface of first backup pad is equipped with first draw-in groove, and the terminal surface of second backup pad is equipped with the second draw-in groove, the both ends of connecting piece be equipped with respectively with first draw-in groove, second draw-in groove first buckle and the second buckle of lock.

In the desk and desk chair combination, the connecting piece is in a strip shape, a chain or a rod shape.

In the desk and desk chair combination, a box body is arranged below the seat plate, chair legs are arranged below the box body and fixedly connected with two sides of the bottom surface of the box body, and the seat plate is fixed above the box body through a hinge, so that the seat plate forms a box cover of the box body.

The beneficial effects are that:

the invention provides a reversible desk and a combination of the reversible desk and a desk chair, wherein the desk is connected with desk legs through four-bar mechanisms at two sides of a drawer, so that the desk top can swing along with the four-bar mechanisms to realize the inclination and horizontal adjustment of the desk top, and when the reversible desk is normally used, the desk top is in a horizontal state for students in middle and primary schools to use, and when the students in midwife are sleeping in afternoon, the desk top is adjusted to be inclined, the students in middle and primary schools are sitting on seats, and the students in middle and primary schools sleep on the desk back or lie on the desk top, so that the problem that the students in middle and primary schools can only lie on the desk to cause uncomfortable afternoon is solved, and the afternoon quality of the students in middle and primary schools can be improved; when the table top is in the horizontal position, the limiting opening is buckled with the first limiting nail and the locking device locks the first connecting rod, so that the table top is limited to incline to the left, and the first limiting nail is attached to the upper end wall surface of the first sliding groove and the locking device locks the first connecting rod, so that the table top is limited to incline to the right; when the tabletop is in an inclined state, the locking device is firstly opened and the tabletop is lifted, so that the first connecting rod can swing and the first limiting nails leave the limiting opening, and when the tabletop swings to the inclined position, the lower end wall surface of the first sliding groove is attached to the first connecting rod and locked by the locking device, the tabletop is limited to the left side, the third connecting rod is limited by the limiting block and the first connecting rod is locked by the locking device, the tabletop is limited to the right side to incline, the tabletop can be matched with the sleeping cushion to use, namely, the upper end of the sleeping cushion is hung on a desk, the lower end of the sleeping cushion is placed on a seat plate of a desk and a chair, and as the tabletop of the desk can incline, the first guard plates and the second guard plates on the two sides of the sleeping cushion can prevent a user from falling over or turning out of the sleeping cushion body during afternoon, so that the additional space of a classroom is not occupied during afternoon, the afternoon nap quality of a student can be better improved, and the problem that the school student can only lie on the desk on the upper side of the desk is uncomfortable is solved.

Drawings

Fig. 1 is a schematic structural view of a reversible desk provided by the invention.

Figure 2 is a schematic view of the tiltable desk in a tilted configuration with the front legs and protective cover removed.

FIG. 3 is a schematic view of the reversible desk in a horizontal position.

FIG. 4 is a schematic view of the movement of the linkage mechanism of the reversible desk.

FIG. 5 is a schematic view of a linkage mechanism with the desk top of the reversible desk in a horizontal and tilted position.

Fig. 6 is a schematic structural view of a locking device of the reversible desk.

FIG. 7 is a schematic view of a combination of a reversible desk and a chair.

Fig. 8 is a schematic diagram of the structure at C in fig. 7.

Fig. 9 is a schematic view of the structure of the desk and chair in fig. 7.

FIG. 10 is a schematic view of a reversible desk, chair and mattress combination.

Fig. 11 is an isometric view of the sleeper of fig. 10.

Fig. 12 is a front view of the sleeper of fig. 10, with a cross-section view at A-A.

Fig. 13 is a top view of the sleeper of fig. 10, with a cross-section view at B-B.

Detailed Description

The invention provides a reversible desk and a combination of the desk and a desk chair, which are used for making the purposes, the technical scheme and the effects of the invention clearer and more definite, and the invention is further described in detail below by referring to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1 to 5, the invention provides a reversible desk, which comprises a desk leg 104, a drawer 102 and a desk top 101, wherein the desk top 101 is fixed above the drawer 102 and is connected into a whole, the desk legs 104 are two and are respectively arranged at two sides of the drawer 102, the desk leg 104 is fixedly connected with a first fixing plate 114, the first fixing plate 114 is fixed at the upper end of the desk leg 104 through a screw, a certain distance is reserved between the first fixing plate 114 and the inner side surface of the desk leg 104, the distance can be realized by sleeving a sleeve on the screw, the reserved position is realized by sleeving the sleeve on the screw for fixing the first fixing plate 114, two end surfaces of the sleeve are respectively abutted to the surface opposite to the first fixing plate 114 and the desk leg 104, the upper end of the first fixing plate 114 is provided with a first chute 115, the first fixing plate 114 is connected with a first connecting rod 116, the other end of the first connecting rod 116 is connected with a second connecting rod 117, the other end of the second connecting rod is connected with a third connecting rod 118, the other end of the third connecting rod 118 is fixedly connected with the lower end of the first connecting rod 114 and is buckled with a first limiting pin 118, the third connecting rod 118 is fixedly connected with the upper end of the first connecting rod 114 and the third connecting rod 118 is buckled with the first connecting rod 118.

The first connecting rod 116 is rotatably connected with the second connecting rod 117, the second connecting rod 117 is rotatably connected with the third connecting rod 118, the third connecting rod 118 is rotatably connected with the first fixing plate 114 through a pin or a screw, the first limit nail 119 is fixedly connected with the first connecting rod 116 and can slide in the first sliding groove 115, therefore, the first fixing plate 114, the first connecting rod 116, the second connecting rod 117 and the third connecting rod 118 form a four-bar mechanism together, the drawer 102 is fixed on the second connecting rod 117, an installation distance for preventing the first connecting rod 116, the second connecting rod 117 and the third connecting rod 118 from colliding with the first fixing plate 114 when the four-bar mechanism swings is reserved between the drawer 102 and the second connecting rod 117, the first limit nail 119 is positioned at the upper end of the first sliding groove 115 when the tabletop 101 is in a horizontal state, the first limit nail 119 can be just buckled with the limit opening 120 on the second connecting rod 117 to prevent the four-bar mechanism and the tabletop 101 from continuously swinging, a locking device is arranged on the first connecting rod 116, and the locking device is correspondingly arranged on the first fixing plate 114 and the tabletop 101 is matched with the first connecting rod 116 in a horizontal position and the inclined position to prevent the locking device from swinging; namely, the first connecting rod 116 is locked by the buckling and locking device of the limiting opening 120 and the first limiting nail 119, so that the tabletop 101 is limited to incline to the left side (the side where the drawer 102 is opened), and the first connecting rod 116 is locked by the abutting and locking device of the first limiting nail 119 and the upper end wall surface of the first chute 115, so that the tabletop 101 is limited to incline to the right side (the side where the drawer 102 is arranged); when the tabletop 101 is to be adjusted to be in an inclined state, the locking device is firstly opened and the tabletop 101 is lifted, so that the first connecting rod 116 can swing and the first limiting nail 119 leaves the position of the limiting opening 120, and when the tabletop 101 swings to a certain angle, the limiting block 121 on the first fixing plate 114 limits the third connecting rod 118 to prevent the third connecting rod 118 from continuously swinging downwards, and at the moment, the locking device locks the first connecting rod 116 to prevent the first limiting nail 119 from sliding and the first connecting rod 116 from swinging; thus, the four-bar mechanism and the table top 101 are locked, namely, the lower end wall surface of the first chute 115 is attached to and locked on the first link 116, so that the table top 101 is limited to incline to the left side (the side of the drawer 102 opening), and the limiting block 121 limits the third link 118 and the locking device is locked on the first link 116, so that the table top 101 is limited to incline to the right side (the side of the drawer 102 back). Preferably, the stopper 121 is integrated with the first fixing plate 114, that is, formed by folding the first fixing plate 114, and it is also possible to weld an additional stopper with a screw or welding. As shown in fig. 6, the locking device locks the first link 116 as follows: the locking is achieved by inserting the locking piece 1112 fixed to the locking device into the locking hole 110 formed in the first fixing plate 114, and the first sliding groove 115 is provided so that the tilting width of the table top 101 is greater when the table top 101 swings at the same angle.

In the above, the first limiting nail 119 is set to be matched with the first chute 115 in a smaller gap, so that when the first connecting rod 116 is locked, the first limiting nail 119 is not overlapped with the first chute 115 around the rotating track of the locking plate, the upper wall and the lower wall of the first chute 115 limit the first limiting nail 119, swing is prevented, the setting of the limiting opening 120 and the limiting block 121 is further reduced, the four-bar mechanism can be locked, and the setting of the limiting opening 120 and the limiting block 121 enables the locked four-bar mechanism to be more stable.

Referring to fig. 6, the locking device includes an unlocking device 112 fixed inside the drawer 102 below the desktop 101, a locking member 111 fixed on the first connecting rod 116, and a pulling rope 113 connecting the locking member 111 and the unlocking device 112, wherein the unlocking device 112 includes a first housing 1121, a second sliding slot 1123 is formed in the first housing 1121, a sliding vane 1122 is installed on the second sliding slot 1123, one end of the sliding vane 1122 is connected with the pulling rope 113, that is, the first housing 1121 is fixed at the position of the central axis inside the drawer 102 at the lower end surface of the desktop 101, so that the locking members 111 at two sides of the reversible desk 1 are symmetrical with respect to the unlocking device 112, and the sliding vane 1122 can slide along the inside of the first housing 1121, thereby pulling the pulling rope 113; the locking piece 111 comprises a second outer shell 1111, a third sliding groove 1114 is formed in the second outer shell 1111, a locking plate 1112 is installed on the third sliding groove 1114, one end of the locking plate 1112 penetrates out of the second outer shell 1111, a boss 1115 is arranged at the other end of the locking plate 1112, the boss 1115 is connected with the traction rope 113, a compression spring 1113 is arranged at the outer side of the boss 1115, one end of the compression spring 1113 is abutted against the inner wall of the second outer shell 1111, the other end of the compression spring 1113 is abutted against the locking plate 1112, namely the second outer shell 1111 is fixed on the first connecting rod 116, the locking plate 1112 can slide along the inner wall of the second outer shell 1111, one end of the locking plate 1112 penetrates out of the second outer shell 1111 and penetrates through the first connecting rod 116, the boss 1115 on the locking plate 1112 penetrates out of the other end of the second outer shell 1111, the compression spring 1113 is sleeved on the boss 1115 to keep the locking plate 1112 in a locking state and reset state when the traction rope 113 is pulled by no external force, and a hole for connecting with the traction rope 113 is arranged on the boss 1115 extending out of the second outer shell 1111; the second casing 1111 is provided with a through hole 1116, the through hole 1116 is formed in two sides of the lower end of the second casing 1111, the through hole 1116 is provided with a second limit nail 1117, the locking piece 1112 is provided with a limit groove matched with the second limit nail 1117, and the extension length of the locking piece 1112 is limited by the cooperation of the second limit nail 1117 and the limit groove, wherein the traction rope 113 is a combination of a brake cable and a brake cable tube for bicycle brake, one end of the brake cable tube is fixed with the first connecting rod 116 above the locking piece 111, the other end of the brake cable tube is fixed with the tabletop 103 outside the first casing 1121, and the locking device is positioned to ensure that the locking piece 1112 can be buckled with the locking opening 110 at the uppermost end of the first chute 115.

Referring to fig. 1, preferably, in order to prevent the four-bar linkage from injuring a user during swinging and preventing the locking device from further swinging the four-bar linkage due to the user touching the locking piece 1112 by mistake, a protection cover 103 is fixed on a side of the table leg 104 away from the drawer 102, and the protection cover 103 wraps the four-bar linkage inside, thereby improving aesthetic feeling.

Preferably, an auxiliary rod 106 is arranged at the lower end of the table legs 104 and is connected with the two table legs 104, and a supporting plate 105 is arranged on the auxiliary rod 106, the supporting plate 105 is two and is arranged in the middle of the auxiliary rod 106, and the supporting plate 105 is used for placing feet of a user.

The lower fixedly connected with first true backup pad 108 of table leg 104, the reverse T shape is constituteed with table leg 104 to first true backup pad 108 to be equipped with first vacuum chuck 107 and table foot cushion 109 respectively in the below at first true backup pad 108 both ends, wherein, first vacuum chuck 107 establishes the front end at desk 1, two first true backup pads 108 level and parallel arrangement promptly, increase desk 1's balance, and first vacuum chuck 107 and the table foot cushion 109 of the below at first true backup pad 108 both ends utilize first vacuum chuck 107 to the actuation of bottom surface and utilize the increase friction of table foot cushion 109, prevent that desk 1 from removing.

Referring to fig. 7 and 9, a desk 1 and desk chair 2 combination includes the above-mentioned reversible desk 1, still include desk chair 2, this desk chair 2 includes seat 201 and chair foot 204, this chair foot 204 is two and all fixedly connected with second backup pad 206 below chair foot 204, second backup pad 206 and chair foot 204 form the reverse T shape, be equipped with second vacuum chuck 205 and chair foot cushion 207 below the both ends of second backup pad 206, second vacuum chuck 205 is established at desk chair 2's rear end, be equipped with detachable connecting piece 4 between second backup pad 206 and the first true backup pad 108, namely two second backup pads 206 level and parallel arrangement, increase desk 1's balance, and the below at second backup pad 206 both ends sets up second vacuum chuck 205 and chair foot cushion 207, utilize second vacuum chuck 205 to the suction of bottom surface and utilize chair foot cushion 207 to increase friction, prevent desk 2's removal, and put connecting piece 4 between second backup pad 206 and first true backup pad 108, namely desk 2 and desk 1 adopt and the back piece 4 to slide when making desk 1 and 2's the opposite to take place when sleeping.

Referring to fig. 8, specifically, the end surface of the first true support plate 108 is provided with a first clamping groove 1081, the end surface of the second support plate 206 is provided with a second clamping groove 2061, two ends of the connecting piece 4 are respectively provided with a first clamping groove 1081 and a second clamping groove 2061, the connecting piece 4 is in a belt shape, a chain shape or a rod shape, the first clamping groove 1081 is buckled with the first clamping groove 41, the second clamping groove 2061 is buckled with the second clamping groove 42, and the detachable connection of the connecting piece 4 is realized, which can of course also be realized in a screw fixing manner, wherein the connecting piece 4 is in a belt shape, a chain shape or a rod shape, preferably a rod shape. Preferably, the first true support plate 108 is tubular, and the connecting piece 4 can be inserted into the tubular first true support plate 108, when in use, the connecting piece 4 is pulled out and the second clamping groove 2061 is buckled with the second clamping buckle 42, meanwhile, the first clamping buckle 41 abuts against the first clamping groove 1081 to realize the buckling, when not in use, the second clamping groove 2061 is separated from the second clamping buckle 42, and the connecting piece 4 can be pushed into the tubular first true support plate 108 to be retracted.

Referring to fig. 9, a box 203 is disposed below the seat 201, chair legs 204 are disposed below the box 203 and are fixedly connected to two sides of a bottom surface of the box 203, the seat 201 is fixed above the box 203 by hinges 202, so that the seat 201 forms a cover of the box 203, namely, the chair legs 204 of the desk and chair 2 are respectively fixed to two sides of a lower end of the box 203, an opening is disposed above the box 203, and the seat 201 is rotatably connected to an opening side of the box 203 by the hinges 202, so that the seat 201 can be rotated when a user needs to store things in the box 203.

The fixing or fixing connection can be realized by adopting a screw connection mode.

Referring to fig. 10, in normal use, the desk 1 top 101 is in a horizontal state, and when a afternoon nap is needed, the desk 1 top 101 is rotated and inclined, so that a user can sit on the desk and chair 2 and lean against the desk top 101 for afternoon nap; preferably, the desk 1 and the desk chair 2 are combined and matched with the sleeping pad 3 with the hooks for use, so that the comfort is improved.

Referring to fig. 11 to 13, the hanger-equipped mattress includes a mattress body 301, the mattress body 301 is provided with a fold line 305, the fold line 305 is parallel in a lateral direction and divides the mattress body 301 into a plurality of parts, and the mattress body 301 can be folded together by the fold line 305, the mattress body 301 includes a pocket 309, a sponge body 312 provided inside the pocket 309, a first cross plate 307 and a second cross plate 311 provided on the sponge body 312 and wrapped in the pocket 309, the first cross plate 307 is provided in an upper end portion of the mattress body 301, and the second cross plate 311 is provided in a lower end portion of the mattress body 301, i.e., the sponge body 312 is installed inside the pocket 309 and divided into several parts, preferably divided into 2-8 parts, the fold line 305 is formed at the division, the pocket 309 connects the sponge bodies 308 of the several parts together to form a whole, and the sponge body 312 and the pocket 309 are fixed together by sewing, so that the mattress body 301 can be folded conveniently. The upper end of the sleeping mat body 301 is provided with a first transverse plate 307 for connecting the hooks 304, a fixed connecting frame 313, a first protecting plate 302 and a second protecting plate 306, the lower end of the sleeping mat body 301 is provided with a second transverse plate 311 for connecting the second protecting plate 306, wherein the first transverse plate 307 and the second transverse plate 311 are arranged below the sponge 308 and are fixedly connected, and the bag 309 is wrapped inside, of course, the lower part of each sponge 312 can be provided with the transverse plates like the first transverse plate 307 and the second transverse plate 311, the stability of the sleeping mat body is improved, and only the first transverse plate 307 and the second transverse plate 311 are arranged for increasing the softness and the comfort of the sleeping mat body 301.

The upper and lower sides of the two sides of the sleeping mat 301 are respectively and movably connected with a first guard board 302 and a second guard board 306. Wherein, the two sides of the first transverse plate 307 are connected with the first guard plate 302 through sofa joints 310, the two sides of the second transverse plate 311 are connected with the second guard plate 306 through the sofa joints 310, the first transverse plate 307 and the first guard plate 302, the second transverse plate 311 and the second guard plate 306 can be turned over at 0 to 120 degrees, preferably, the first transverse plate 307 and the first guard plate 302, the second transverse plate 311 and the second guard plate 306 are turned over at 0 to 90 degrees, that is, the first guard board 302 and the second guard board 306 are respectively overlapped with the first transverse board 307 and the first transverse board 307 when the sleeping mat is folded, and when in use, the first guard board 302 and the second guard board 306 are turned over by 90 degrees, so that the first guard board 302 and the second guard board 306 are perpendicular to the first transverse board 307 and the first transverse board 307, and are used for preventing a pupil from turning over or turning out of the sleeping mat body 301 during afternoon nap, wherein the sofa joint 310 can be replaced by a folding angle adjusting hinge, and soft cotton bodies 312 or sponge bodies 308 are arranged on the first guard board 302 and the second guard board 306 for improving comfort.

The middle part of the upper end of the sleeping mat body 301 is provided with a fixed connection frame 313, the upper end of the fixed connection frame 313 is movably connected with a pillow 303, the fixed connection frame 313 is connected with the middle part of the first transverse plate 307, wherein the upper end of the fixed connection frame 313 is provided with a U-shaped opening, two side surfaces are provided with sliding grooves 314, the lower end of the pillow 303 is provided with a connecting rod 315, the connecting rod 315 is provided with a through hole corresponding to the sliding grooves 314, the screw 316 penetrates through the sliding grooves 314 and the through holes to realize the movable connection of the fixed connection frame 313 and the pillow 303, therefore, the fixed connection frame 313 is used for connecting the pillow 303, the screw 316 penetrates through the sliding grooves 314 and the through holes to realize the movable connection of the fixed connection frame 313 and the pillow 303, so that the screw 316 can slide on the sliding grooves 314, and then the length of the pillow 303 can be adjusted to be suitable for users with different heights.

In another embodiment, the fixing connection frame 313 is a telescopic rod, the U-shaped opening is formed on the front surface of the fixing connection frame 313, the fixing connection frame 313 is a telescopic rod, the telescopic rod is provided with a telescopic rod formed by combining square tubes, the telescopic rod can realize the expansion of the pillow 303 to a greater extent, the U-shaped opening is formed on the front surface of the fixing connection frame 313, namely, the back surface of the square tube is not provided with an opening, the two sides of the telescopic rod are provided with sliding grooves 314, and the screw 316 penetrates through the sliding grooves 314 and through holes to realize the movable connection of the telescopic rod and the pillow 303, so that the connecting rod 315 of the pillow 303 is inserted into the upper end of the square tube, the back surface of the square tube without the opening can support the connecting rod 315 of the pillow 303 to prevent the pillow 303 from rotating backward, and when the pillow 303 is not used, the pillow 303 can be folded on the sleeping pad 301 through the position of the U-shaped opening.

The upper end both sides of the sleeping pad body 301 are equipped with the couple 304, and this couple 304 is established at the back of sleeping pad body 301, couple 304 and first diaphragm 307 fixed connection through setting up couple 304, can hang sleeping pad body 301 on the desk, and the lower extreme of sleeping pad body 301 is filled up on desk chair, therefore the elementary and secondary school student can lean on to lie on the seat of oneself and have noon break, increase elementary and secondary school's afternoon break comfort level and afternoon break quality, solve elementary and secondary school's afternoon break and can only lie prone on the desk and lead to uncomfortable problem.

Wherein, the fixing or the fixed connection can be realized by adopting a mode of screw connection and welding.

Wherein, when not needing to rest, the sleeping mat 3 can be folded and put into the box 203, and can be taken out and opened at the time of afternoon nap.

In use, for the last row of seats, the desk and chair 3 can be moved in front of the first row and used in combination with the desk 1 of the first row.

The desk 1 is connected with the desk legs 104 through the four-bar mechanism at two sides of the drawer 102, so that the desk top 101 can swing along with the four-bar mechanism to realize the inclination and horizontal adjustment of the desk top 101, the desk top 101 is in a horizontal state for students in middle and primary schools to use in class during normal use, and the desk top 101 is adjusted to be inclined during afternoon nap, the students in middle and primary schools sit on seats and sleep by leaning back or lying on the desk top 101, the problem that the students in middle and primary schools can only lie on the desk to cause uncomfortable afternoon nap is solved, and the afternoon nap quality of the students in middle and primary schools can be improved; the locking device locks the first limit nail 119, the limit opening 120 and the limit block 121 limit the four-bar mechanism when the desktop 101 is in a horizontal state and a inclined state respectively, and the locking device is matched with the locking of the first limit nail 119 to lock the four-bar mechanism at the corresponding position and not swing any more, so that the desktop 101 is prevented from swinging in reuse, the desktop 101 can be matched with the sleeping mat 3 for use when being inclined, namely, the upper end of the sleeping mat 3 is hung on the desk 1, and the lower end of the sleeping mat is placed on the seat 201 of the desk and chair 2, as the desktop 101 of the desk 1 can be inclined, a middle and primary school student can reliably or lie on the sleeping mat 3 for afternoon, the first guard plate 302 and the second guard plate 306 on two sides of the sleeping mat 301 can prevent the user from falling over or falling out of the sleeping mat body during afternoon, therefore, the additional space of a classroom is not occupied during afternoon, the afternoon nap can be more improved, and the afternoon quality of the middle and primary school student can only lie on the seat 201 of the desk and chair can be used for solving the problem of discomfort caused by the middle and primary school student.

It will be understood that equivalents and modifications will occur to those skilled in the art based on the present invention and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention.

Claims (9)

1. The turnover desk comprises desk legs, a drawer and a desktop, wherein the desktop is fixed above the drawer and connected into a whole, the turnover desk is characterized in that the desk legs are two and are respectively arranged on two sides of the drawer, the desk legs are fixedly connected with a first fixing plate, the upper end of the first fixing plate is provided with a first sliding groove, the first fixing plate is connected with a first connecting rod, the first connecting rod is provided with a first limit nail matched with the first sliding groove, the other end of the first connecting rod is connected with a second connecting rod, the other end of the second connecting rod is connected with a third connecting rod, the other end of the third connecting rod is rotationally connected with the lower end of the first fixing plate, a limit block for limiting the third connecting rod is arranged below the first fixing plate, the drawer is fixed on the second connecting rod, the second connecting rod is provided with a limit opening buckled with the first limit nail, the first connecting rod is provided with a locking device, and the first fixing plate is provided with a locking opening matched with the locking device corresponding to the horizontal and inclined position of the desktop respectively; the locking device comprises an unlocking device fixed inside a drawer below a desktop, a locking piece fixed on a first connecting rod, and a traction rope for connecting the locking piece with the unlocking device, wherein the unlocking device comprises a first shell, a second sliding groove is formed in the first shell, a sliding sheet is installed on the second sliding groove, one end of the sliding sheet is connected with the traction rope, the locking piece comprises a second shell, a third sliding groove is formed in the second shell, a locking piece is installed on the third sliding groove, one end of the locking piece penetrates out of the second shell, a boss is arranged at the other end of the locking piece and is connected with the traction rope, a compression spring is arranged at the outer side of the boss, one end of the compression spring is in butt joint with the inner wall of the second shell, and the other end of the compression spring is in butt joint with the locking piece; when the tabletop is in a horizontal state, the first limiting nail is positioned at the upper end of the first sliding groove, the first limiting nail can be just buckled with a limiting opening on the second connecting rod, the locking device locks the first connecting rod, the tabletop is limited to incline to the left side, and the first limiting nail is attached to the upper end wall surface of the first sliding groove and locks the first connecting rod by the locking device, so that the tabletop is limited to incline to the right side.

2. The reversible desk of claim 1, wherein the second housing is provided with a through hole, a second limiting nail is arranged on the through hole, and a limiting groove matched with the second limiting nail is arranged on the locking plate.

3. The reversible desk as claimed in claim 1, wherein a protective cover is fixed to a side of the leg away from the drawer.

4. The reversible desk of claim 1, wherein the legs are provided with auxiliary bars at their lower ends for connecting the two legs, and support plates are provided on the auxiliary bars.

5. The reversible desk of claim 1, wherein a first support plate is fixedly connected to the lower portion of the desk leg, the first support plate and the desk leg form an inverted T shape, and a first vacuum chuck and a desk foot rubber pad are respectively arranged below two ends of the first support plate.

6. A desk and desk chair combination, including the reversible desk of any one of claims 1 to 5, characterized in that, still include desk chair, this desk chair includes seat and chair foot, chair foot below fixedly connected with second backup pad, second backup pad and chair foot constitute the reverse T shape, are equipped with second vacuum chuck and chair foot cushion in the below at second backup pad both ends, be equipped with detachable connecting piece between second backup pad and the first backup pad.

7. The desk and chair combination of claim 6 wherein the end face of the first support plate is provided with a first clamping groove, the end face of the second support plate is provided with a second clamping groove, and the two ends of the connecting piece are respectively provided with a first buckle and a second buckle buckled with the first clamping groove and the second clamping groove.

8. The desk and chair combination of claim 7 wherein said connector is in the form of a belt, chain or bar.

9. The desk and chair combination of claim 6 wherein the seat is provided with a box below the base, the legs are provided below the box and fixedly connected to two sides of the bottom of the box, and the seat is fixed above the box by a hinge to form a cover of the box.