CN105029913B - Easy entry and exit table and chairs - Google Patents

Abstract

The invention relates to an easy in and out type table and chair. The bottom of the table leg in the easy-in and out-type table and chair is provided with a table leg hinge structure for the table part to swing back and forth, and the bottom of the chair leg is provided with a chair leg hinge structure for the chair part to swing back and forth, and the table part and the chair part are on their respective swing strokes There are stowed positions close to each other and open positions far away from each other; the easy-to-enter and exit-type tables and chairs also include table leg swings coaxially hinged with the swing axis of the table legs, and chair leg swings coaxially fixed with the swing axis of the chair legs. and the connecting rod hinged between the table leg swinging part and the chair leg swinging part, the connecting rod, the table leg swinging part and the chair leg swinging part constitute a reverse four-bar linkage mechanism, and the table leg swinging part is provided with a The one-way stop structure is used to stop and cooperate in the swing direction to drive the table part to move to the stowed position only when the chair part moves to the stowed position. The above-mentioned easy-to-enter and exit-type desks and chairs can give passage space for passing people to facilitate people to go in and out, and have simple structure, reliable connection and low cost.

Description

Easy entry and exit table and chairs

technical field

The invention relates to an easy in and out type table and chair.

Background technique

After the introduction of the decision to further expand the enrollment scale of colleges and universities, the total number of colleges, the number of students enrolled in colleges and universities nationwide and the number of students in school have more than doubled compared with 1998. In recent years, college students in my country have accounted for 14% of the population of the same age. By 2010, the number of Chinese college students has reached 30 million. University classrooms are very crowded. The market potential represented by Chinese college students will also become larger and larger. With the increase of the country's investment in higher education, the social reform of college logistics is also gradually deepening. The hardware facilities of colleges and universities should be raised to a new level. It is particularly urgent for college desks and chairs to be designed scientifically and rationally as hardware facilities closely related to college students' learning. At present, the combined classrooms of most schools are basically equipped with traditional fixed rows of desks and chairs. This kind of desks and chairs adopts an integrated design and is fixedly installed on the ground. The chair surface is hinged on the chair bracket and can be flipped and folded. The overall structure is simple, neat and standardized, and it is widely used in society. However, when a row of tables and chairs is full of people, if people need to go to the middle of a row of tables and chairs, because the distance between the tables and chairs is very small, it is difficult to move to the side. People need to stand up to make room for walking, which will affect teachers and other students. At the same time, the distance between tables and chairs will also cause great inconvenience to the cleaning of the ground.

The Chinese patent with the application number 201420200117.X and the authorized announcement number CN 203828429 U discloses a combination of table and chair for abdomen, including table parts and chair parts. The space for the chair parts is formed between them; the chair parts include the seat surface, the rear chair feet, the curved rod and the support rod, and the curved rod and the support rod are hinged between the seat plane of the chair surface and the column of the table part, forming a parallelogram mechanism that can rotate Stow it into the chair component storage space or put it down on the ground. The bent bar has a front foot part connected to the seat plane, and the rear chair foot is hinged at the rear part of the seat plane and constitutes a chair leg with the front chair foot of the bent bar. Linkage gears are also set at the hinge shaft between the support rod and the seat plane, and at the hinge shaft between the rear chair foot and the seat plane, so that the rear chair foot can be retracted and retracted with the chair surface. form a stable support. Although the above-mentioned combination of tables and chairs can be put away, it is convenient for cleaning, but if a person passes by, the person who has already sat down still needs to stand up and put away the chair parts to make way for the passage space, which also cannot meet the requirements for easy access, and requires Gear transmission is adopted, the processing cost is high, and the requirement for structural strength is high.

Contents of the invention

The object of the present invention is to provide an easy-to-enter and exit-type table and chair that can give way to passing people.

The technical scheme adopted by the easy-in and out-type desk and chair in the present invention is: the easy-in and out-type desk and chair includes a table part and a chair part, the table part includes a table leg, the chair part includes a chair leg, and the bottom of the table leg is provided with a There is a table leg hinge structure for the table part to swing back and forth, and the bottom of the chair leg is provided with a chair leg hinge structure for the chair part to swing back and forth. and the open positions away from each other; the easy-in and out-type tables and chairs also include table leg swings coaxially hinged with the swing axis of the table legs, chair leg swings coaxially fixed with the swing axis of the chair legs, and hinged on the table The connecting rod between the leg swinging piece and the chair leg swinging piece, the connecting rod, the table leg swinging piece and the chair leg swinging piece form a reverse four-bar linkage mechanism, and the table leg swinging piece is provided with a The swinging direction stop is matched with a one-way stop structure that drives the table part to move to the stowed position only when the chair part moves to the stowed position.

A chair leg torsion spring for exerting an active force on the chair leg to swing toward the stowed position is connected to the chair leg through transmission.

A table leg torsion spring for exerting force on the table leg to swing toward the open position is connected to the table leg through transmission.

The table legs include front and rear table legs arranged in parallel in the front and back directions, the hinged structure of the table legs includes table leg seats for fixing to the ground, and the front and rear table legs are hinged on A parallelogram mechanism is formed between the table leg seat and the table top of the table component.

The rear table legs are telescopic legs.

The bottom of the table leg has a limit block structure, and the bottom surface of the limit block structure has a structure for fitting and blocking with the table leg seat so as to limit the movement of the table parts to the stowed position and the opened position respectively. Stow the locating surface and open the locating surface.

The table leg seat is provided with a pair of hinged lugs arranged at intervals, and the table legs are hinged between the corresponding two hinged lugs.

The table leg swing member is a triangular plate, two corners of the plate are respectively hinged with the connecting rod and the table leg seat, and the one-way stop structure is fixed on the rest of the plate. A corner stop shaft.

The hinged structure of the chair legs includes a chair leg seat for being fixed to the ground, the chair leg seat is provided with a chair leg bearing, and the chair part has a chair leg rotating shaft and through the cooperation of the chair leg rotating shaft and the chair leg bearing For swinging, the chair leg seat is provided with a limiting groove, and the limiting groove has a retracting limit for blocking and cooperating with the chair leg along the swinging direction to limit the movement of the chair parts to the stowed position and the opened position. Position wall and open limit wall.

The chair leg includes a chair leg support column, and the chair leg rotation shaft is arranged perpendicular to the chair leg support column and is fixedly connected with the chair leg support column.

The present invention adopts the above technical scheme, the table leg and the chair leg can swing back and forth between the open position and the stowed position through the table leg hinge structure and the chair leg hinge structure respectively, and the easy-in and out-type table and chair also includes a table leg swing member, The chair leg swing piece and the connecting rod hinged between the table leg swing piece and the chair leg swing piece form a reverse four-bar linkage mechanism with the table leg swing piece and the chair leg swing piece. There is a one-way stop structure for cooperating with the table leg along the swing direction to drive the table part to move to the open position when the chair part moves to the open position. Therefore, relying on the reverse four-bar linkage mechanism and the one-way stop structure, when the chair part moves to the stowed position, the table part can move to the stowed position at the same time, forming a large passage space when no one uses the table and chair; when the chair part is opened, due to the one-way stop structure and the table leg The blocking fit is released, and the chair part can move to the open position or to the stowed position under the action of external force, so that the table part can still be moved to the stowed position after the person sits down. In the case of people using the table and chair A larger passage space is formed, and compared with the prior art, it is convenient for people to enter and exit. At the same time, the table part and the chair part are connected by connecting rods with simple structure, reliable connection and low cost.

Description of drawings

Fig. 1 is the front view of an embodiment of the easy in and out type table and chair of the present invention;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the top view of Fig. 2;

Fig. 4 is the left view of Fig. 1;

Fig. 5 is a schematic diagram of the connection structure of the reverse four-bar linkage mechanism in Fig. 2;

Fig. 6 is a structural schematic diagram of the upper limit groove of the chair leg seat;

Fig. 7 is a schematic diagram of the structure of the limit block at the bottom of the table leg;

Fig. 8 is a perspective view of an embodiment of the easy-in and out-type desk and chair of the present invention;

Fig. 9 is a schematic diagram of the structure when the desktop in Fig. 4 is raised;

Fig. 10 is a schematic view of the use state of an embodiment of the easy-to-enter and exit-type desk and chair of the present invention.

The names corresponding to the reference signs in the figure are: 1-table parts, 2-table top, 3-front table legs, 4-rear table legs, 5-limiting block structure, 6-folding positioning surface, 7-opening positioning Surface, 8-table leg seat, 9-hinged lug plate, 10-table leg swing member, 11-stop shaft, 12-reinforcing plate, 13-table leg torsion spring, 14-chair parts, 15-chair surface, 16 -chair leg, 17-chair leg supporting column, 18-chair leg shaft, 19-chair leg seat, 20-limiting groove, 21-closed limiting wall, 22-opening limiting wall, 23-chair leg torsion spring , 24-chair leg swing member, 25-connecting rod.

detailed description

One embodiment of the easy-to-enter and exit-type desk and chair of the present invention is shown in Figures 1 to 10. It is an easy-to-enter and exit-type desk and chair that can be automatically folded, including a table part 1 and a chair part 14. The table part 1 includes a desktop 2 and a table Legs, the chair component 14 includes chair legs 16 and a chair surface 15 .

The table legs include two front table legs 3 and two rear table legs 4, the two front table legs 3 and the two rear table legs 4 are arranged along the left and right direction of the desktop 2, and the bottom of each table leg is provided with a table part 1 front and rear Swinging table leg hinged structure, the table leg hinged structure includes the table leg base 8 that is used to be fixed on the ground, each table leg base 8 is respectively provided with two pairs of hinged ear plates 9, and the bottom of each table leg is provided with for setting To the limit block structure 5 between the corresponding two hinged lugs 9, the hinge lugs 9 and the limit block structure 5 are provided with hinge holes corresponding to each other and hinged by the hinge shaft passing through the hinge holes. The form of double hinged lugs 9 can increase the contact area and ensure the swing stability and flexibility of the table legs. The tops of each table leg are hinged to the table top 2, so that the two ends of the table legs are respectively hinged between the table top 2 and the hinged lugs 9 to form a parallelogram mechanism, which can provide stable support for the table top 2 and realize The translation of the desktop 2 effectively prevents objects from falling. The bottom surface of the limit block structure 5 has two slopes, which are respectively the retracted positioning surface 6 and the opened positioning surface 7, which are respectively used to fit and block the table leg seat 8 to move to the retracted position and the opened position respectively. The part 1 is limited, the positioning is reliable and accurate, and the stability is good. At the same time, it can prevent the connecting rod 25 from bearing an excessive load, and reduce the requirement on the structural strength of the connecting rod 25 . In order to facilitate access to items and form a larger passage space, the rear table leg 4 is in the form of a telescopic rod, which is a telescopic leg, which can make the desktop 2 turn forward when needed. In order to reduce the weight of the table part 1, the table bucket of the table part 1 is formed by U-shaped brackets arranged at intervals along the front and rear directions under the desktop 2.

The chair leg 16 of chair part 14 comprises a chair leg supporting column 17 and the chair leg rotating shaft 18 that is arranged perpendicular to the chair leg supporting column 17 and is fixedly connected with the chair leg supporting column 17, and the chair leg 16 bottom is provided with for being fixed on the ground. The chair leg seat 19, the chair leg seat 19 is provided with two left and right bearing seats spaced apart, and each bearing seat is respectively provided with a chair leg bearing for the chair leg rotating shaft 18 to rotate and assemble, and the chair part 14 passes the chair leg rotating shaft 18 and The cooperation of chair leg bearings swings back and forth. The bearing seat on the left side is also provided with a limiting groove 20. The limiting groove 20 has two side groove walls for blocking and cooperating with the chair leg 16 along the swing direction, respectively for moving to the stowed position. The retractable limit wall 21 for limiting the chair part 14 and the open limit wall 22 for limiting the chair part 14 moving to the open position can make the chair part 14 rotate within the set range to ensure stability .

Rely on the retractable positioning surface 6 and the open positioning surface 7 on the limiting block structure 5 of the table leg, and the retractable limiting wall 21 and the opening limiting wall 22 of the upper limit groove 20 of the chair leg seat 19, the table component 1 and the chair Components 14 respectively have a retracted position close to each other and an open position far away from each other on their respective swing strokes (positions shown by double-dot dash lines and solid lines in Figure 10 respectively), and the specific positions of the retracted position and the opened position can be Adjust as needed to ensure comfortable use.

The easy-in and out-type desk and chair also includes a table leg swing member 10 coaxially hinged with the swing axis of the table leg, a chair leg swing member 24 fixed coaxially with the swing axis of the chair leg 16, and a chair leg swing member 24 hinged between the table leg swing member 10 and the chair leg. The connecting rod 25 between the swinging members 24. The table leg swing member 10 is a triangular plate, two corners of the plate are respectively hinged with the connecting rod 25 and the hinged lug 9 on the right rear table leg seat 8, and the remaining corner is fixed with a stop shaft 11. In order to ensure structural stability, the hinged lug 9 on the right rear table leg base 8 is also hinged with a reinforcing plate 12 supported on the other end of the stop shaft 11 . Chair leg swing member 24 antirotation is assembled in the swing arm of chair leg rotating shaft 18 right-hand sides, and connecting rod 25 is hinged away from the swing end of one end of table leg and swing arm. The connecting rod 25 forms a reverse four-bar linkage mechanism with the table leg swing member 10 and the chair leg swing member 24, and is used to make the other rotate counterclockwise when one of the table leg swing member 10 and the chair leg swing member 24 rotates clockwise . The stopper at the table leg constitutes a one-way stop structure, which is used to stop and cooperate with the table leg along the swing direction to drive the table part 1 to move to the stowed position when the chair part 14 moves to the stowed position.

Also be provided with chair leg torsion spring 23 between chair leg rotating shaft 18 and chair leg seat 19, be used for the active force that chair leg 16 is applied towards the position swing; The spring 13 is used to exert a swinging force towards the open position to the table legs. Setting the chair leg torsion spring 23 can make the chair part 14 automatically move to the stowed position when the person leaves the chair part 14, and at the same time drive the table part 1 to move to the stowed position through the reverse four-bar linkage mechanism and the one-way stop structure, realizing Automatically collapse. When the chair part 14 moves to the retracted position and the one-way stop structure releases the blocking of the table legs through the reverse four-bar linkage mechanism, the table leg torsion spring 13 can drive the table legs to automatically move to the open position to realize automatic opening At the same time, it can prevent the table part 1 from shaking and ensure the stability of the table part 1.

The above-mentioned easy-to-enter and exit-type desks and chairs adopt reverse thinking, change the method of retracting chairs adopted by existing desks and chairs, and adopt the scheme of retracting tables, which solves the problem that a single chair is relatively light and light, and the chair becomes smaller after a person sits on it. Quite cumbersome problem, and has automatic stowage function, relies on connecting rod 25 to realize the linkage of table part 1 and chair part 14, uses labor-saving, convenient. At the same time, the combination of the reverse four-bar linkage mechanism and the one-way stop structure realizes the function that the table can be opened or closed when the chair is opened (the front of the chair can pass through people after closing), and the table must be closed when the chair is closed. In addition, the rear table leg 4 adopts a retractable structure, and the table bucket can be lifted up when it is necessary to access books in the table bucket, so that there is no need to bend down; when someone passes in front of the table, the tabletop 2 can also be lifted up so The table is closer to the human body to further increase the front and rear movement distance of the desktop 2, which is convenient for passing people in front, and can greatly facilitate the use of tables and chairs while facilitating the passage of people.

In the above-mentioned embodiment, the table leg adopts the form of parallelogram mechanism, and the chair leg torsion spring 23 and the table leg torsion spring 13 are respectively driven and connected to the chair leg 16 and the table leg. In other embodiments of the present invention, the table legs can also be swung back and forth in other hinged ways, such as the hinged form of the chair part 14, and the chair leg torsion spring 23 and the table leg torsion spring 13 can also be omitted or performed. Efficient replacement, can completely rely on manpower to carry out retracting table part 1 and chair part 14 when saving. In addition, in the above embodiment, the rear table leg 4 is a telescopic leg, and in other embodiments, the rear table leg 4 can also be replaced by a leg with a fixed length.

Claims (10)

1. easy turnover type tables and chairs, including table part and chair part, the table part include table leg, the chair part includes chair leg, It is characterized in that：The bottom of the table leg is provided with the table leg articulated structure of pedestal table part swing, and the bottom of leg is set There is the chair leg articulated structure for chair part swing, the table part and chair part have respectively on respective oscillating stroke That mutually draws close packs up position and the open position being located remotely from each other；The easy turnover type tables and chairs are also including coaxial with the axis of oscillation of table leg The table leg swing component that is hinged, the co-axially fixed chair leg swing component of axis of oscillation with chair leg and it is hinged on table leg swing component and chair leg Connecting rod between swing component, the connecting rod constitutes reverse quadric chain, the table leg with table leg swing component and chair leg swing component Swing component be provided be used for table leg along swaying direction block coordinate with only in chair part to packing up when position is moved drive table part To packing up the unidirectional Stop structure that position is moved.

2. easy turnover type tables and chairs according to claim 1, it is characterised in that：It is connected with leg for chair Leg applies the chair leg torsion spring towards the active force for packing up position swing.

3. easy turnover type tables and chairs according to claim 1, it is characterised in that：It is connected with the table leg for table Leg applies the table leg torsion spring of the active force swung towards open position.

4. the easy turnover type tables and chairs according to claim 1 or 2 or 3, it is characterised in that：The table leg is included in fore-and-aft direction Upper preceding table leg and rear table leg arranged in parallel, the table leg articulated structure include the table leg seat for being used to be fixed on ground, described Preceding table leg and rear table leg are hinged between the table leg seat and the desktop of table part and form parallel-crank mechanism.

5. easy turnover type tables and chairs according to claim 4, it is characterised in that：The rear table leg is telescopic legs.

6. easy turnover type tables and chairs according to claim 4, it is characterised in that：The bottom of the table leg has spacing agllutination Structure, the bottom surfaces of the standoff features, which has, to be used to fit with table leg seat and block cooperation to moving to pack up position and beat respectively The table part of open position spacing pack up locating surface and open locating surface.

7. easy turnover type tables and chairs according to claim 4, it is characterised in that：The table leg seat is provided with paired arranged for interval Be hinged otic placode, the table leg is hinged on corresponding two and is hinged between otic placode.

8. easy turnover type tables and chairs according to claim 4, it is characterised in that：The table leg swing component is to be shaped as triangle Plate, the two of which corner of the plate is hinged with the connecting rod and table leg seat respectively, and the unidirectional Stop structure is solid It is scheduled on the block axle in one corner of residue of plate.

9. the easy turnover type tables and chairs according to claim 1 or 2 or 3, it is characterised in that：Leg articulated structure includes using Chair leg seat on fixed to ground, leg seat is provided with chair leg bearing, and the chair part has chair leg rotating shaft and passed through Chair leg rotating shaft and the cooperation swing of chair leg bearing, leg seat be provided with stopper slot, the stopper slot have be used for Chair leg coordinate along swaying direction block with packed up to moving to the chair part of position and open position carry out it is spacing pack up limited wall and Open limited wall.

10. easy turnover type tables and chairs according to claim 9, it is characterised in that：Leg includes a chair leg support column, Leg rotating shaft sets perpendicular to chair leg support column and is fixedly connected with chair leg support column.