CN2666275Y

CN2666275Y - Folding mechanism for table top attached to chair back

Info

Publication number: CN2666275Y
Application number: CN 200320131460
Authority: CN
Inventors: 昝贺伏
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-29
Filing date: 2003-12-29
Publication date: 2004-12-29
Anticipated expiration: 2013-12-29

Abstract

The utility model discloses a folding mechanism of the best back rest additional tabletop, and comprises a pair of brackets, a round rod, and a tabletop. The utility model is characterized in that each bracket is provided with a through hole; the left side and the right side of the bracket are respectively provided with an inclined plane, an arc curved-face of the bracket, and a orbital plane formed by the supporting plane of the arc curved-face; the tabletop consists of a tabletop panel and two side boards, each of which is provided with a long groove which is corresponding to the trough hole and has two circular arc planes at the two ends, and a side board arc curved-face which is matched with the orbital plane; the round rod is fixed in the hole after passing through the through hole of the bracket which is fixedly arranged on the chair legs and passing through the long groove of the two side boards. The folding mechanism of the utility model has the advantages of simple structure, easy operation, easy manufacturing, and is suitable for mass production.

Description

The fold mechanism of the additional desktop of the chair back

Technical field

The utility model relates to the fold mechanism of the additional desktop of a kind of chair back.

Background technology

Often be provided with the seat of additional desktop on many row's chair back in classroom or the lecture hall, desktop can not flexible folded meeting influence the unobstructed of fire escape.Therefore need a kind of energy folded desktop mechanism flexibly.

The utility model content

The purpose of this utility model provides the fold mechanism of the additional desktop of a kind of chair back, makes the desktop can be folded flexibly, guarantees that fire escape is unimpeded.

The purpose of this utility model is achieved like this: the fold mechanism that the additional desktop of a kind of chair back is provided, it comprises pair of brackets, a round bar and a desktop, support is fixed on the seat leg, it is characterized in that: a through hole is respectively arranged on each described support, support each side has the inclined-plane, the orbital plane that the supporting surface of support arc-shaped curved surface and support arc-shaped curved surface constitutes, described desktop is to be made of biside plate and desktop panel, respectively have on each side plate one with described through hole corresponding, two ends are the elongated slot of circular arc end face and the side plate arc-shaped curved surface that matches with described orbital plane, and described round bar is fixed in this through hole after passing the described rack ventilating hole that is fixed on the seat leg and the elongated slot on the biside plate.

Desktop fold mechanism of the present utility model is simple in structure, flexible operation, making easily, be fit to produce in batches.

Description of drawings

After at length introducing an embodiment of the present utility model in conjunction with the accompanying drawings, can be expressly understood other purpose of the present utility model, advantage more.Each accompanying drawing is:

Fig. 1 is the schematic diagram that is in the additional desktop fold mechanism of the chair back of folded state after the assembling;

Fig. 2 is the schematic diagram of the in running order additional desktop fold mechanism of the chair back in assembling back;

Fig. 3 is the schematic diagram of desktop;

Fig. 4 is the desktop side generalized section after the B-B line along Fig. 3 dissects;

Fig. 5 is the desktop side generalized section after the A-A line along Fig. 3 dissects;

Fig. 6 is the round bar schematic diagram;

Fig. 7 is the left side schematic diagram of support;

Fig. 8 is the front schematic view of support;

Fig. 9 is the schematic top plan view of support;

Figure 10 is the support generalized section after the left side schematic diagram A-A line along support dissects.

Figure number wherein:

1 support, 3 round bars, 4 seat legs, 5 through holes

6 screw elements are by hole 7 self threading pin A desktop A2 desktop panels

A1 support inclined-plane B1 support arc-shaped curved surface

C1 support arc-shaped curved surface supporting surface B side plate arc-shaped curved surface C, D end face

E side plate F elongated slot

The specific embodiment

Earlier referring to Fig. 1, Fig. 1 is the schematic diagram that is in the additional desktop fold mechanism of the chair back of folded state after the assembling of the present utility model, the fold mechanism of the additional desktop of the chair back comprises pair of brackets 1, a round bar 3 and a desktop A, each side there is support inclined-plane A1 on each described support 1 base, the orbital plane that the supporting surface C1 of support arc-shaped curved surface B1 and support arc-shaped curved surface constitutes, near triangular supports 1 main body drift angle, a through hole 5 is set, on the face on the leg-of-mutton limit of two other outside the orbital plane, on this through hole 5, the below is provided with screw element respectively by hole 6, fastening by self threading pin 7 and seat leg 4, the faying face of the faying face of support 1 and seat leg 4 has the shape that is complementary; Described desktop A is made of biside plate E and desktop panel A2,, elongated slot Fs that two ends be circular arc end face C and D 5 corresponding with described through hole and the side plate arc-shaped curved surface B that matches with described orbital plane are respectively arranged on each side plate E, and described round bar 3 is fixed in this through hole 5 after passing described support 1 through hole 5 that is fixed on the seat leg 4 and the elongated slot F on the biside plate E.Under state shown in Figure 1, reclining support inclined-plane A1, the And circular arc end face D by the elongated slot F on its biside plate E upper end of support 1 orbital plane of desktop panel A2 is suspended on the round bar 3.

Fig. 2 is the schematic diagram that assembling of the present utility model back desktop A is in the additional desktop fold mechanism of the chair back of the state of setting level, when needs are set level desktop A, can be with desktop panel A2 along support inclined-plane A1, in elongated slot F, carry when C face and round bar 3 are adjacent to, press down desktop panel A, at this moment side plate arc-shaped curved surface B slides along the support arc-shaped curved surface B1 of support 1, when the support arc-shaped curved surface supporting surface C1 of the side plate arc-shaped curved surface B of desktop A and support is adjacent to, this moment, desktop A set level just, desktop by about the support arc-shaped curved surface supporting surface C1 of two supports 1 support.

With reference to figure 3, Fig. 4 and Fig. 5, the utility model desktop A is made of biside plate E and desktop panel A2, the side plate arc-shaped curved surface B that matches with described support 1 orbital plane is arranged on each side plate E, can be clear that from figure desktop A also can be the monolithic molding spare that is made of biside plate E and desktop panel A2, the elongated slot F that on each side plate E two ends to be arranged all be circular arc end face C and D.

With reference to figure 7, Fig. 8, Fig. 9 and Figure 10, from figure, be clear that, support 1 also can be a triangular shape plastic mould pressing spare, both sides, triangular shaped body base all are provided with the orbital plane of the supporting surface C1 formation of support inclined-plane A1, support arc-shaped curved surface B1 and support arc-shaped curved surface, a through hole 5 is set near the triangular shaped body drift angle, on the face on the leg-of-mutton limit of two other outside the orbital plane, screw element is set by hole 6 respectively, should intersect vertical with through hole 5 by the axis in hole 6 at the upper and lower of this through hole.

Fig. 6 has showed the schematic diagram of a round bar 3, and this pipe can be hollow pipe or steel pipe.

The fold mechanism of the additional desktop of the utility model chair back also can be used for various places such as train, aircraft and room provides collapsible desktop.

Claims

1, the fold mechanism of the additional desktop of a kind of chair back, it comprises pair of brackets, a round bar and a desktop, support is fixed on the seat leg, it is characterized in that: a through hole is respectively arranged on each described support, support each side has the inclined-plane, the orbital plane that the supporting surface of support arc-shaped curved surface and support arc-shaped curved surface constitutes, described desktop is to be made of biside plate and desktop panel, respectively have on each side plate one with described through hole corresponding, two ends are the elongated slot of circular arc end face and the side plate arc-shaped curved surface that matches with described orbital plane, and described round bar is fixed in this through hole after passing the described rack ventilating hole that is fixed on the seat leg and the elongated slot on the biside plate.

2, the fold mechanism of the additional desktop of the chair back according to claim 1, it is characterized in that: support can be triangular shape, both sides, triangular supports main body base all are provided with the orbital plane of inclined-plane, support arc-shaped curved surface formation, a through hole is set, on the face on the leg-of-mutton limit of two other outside the orbital plane, at the upper and lower of this through hole screw element is set respectively and passes through the hole near the triangular shaped body drift angle.

3, the fold mechanism of the additional desktop of the chair back as claimed in claim 1 or 2, it is characterized in that: described desktop is by two side plates and the monolithic molding spare that the desktop panel constitutes.

4, as the fold mechanism of the additional desktop of the chair back as described in the claim 3, it is characterized in that described round bar can be hollow pipe or steel pipe.