CN105599905A - Locking mechanism for retractable seat - Google Patents

Abstract

The invention discloses a locking mechanism for a retractable seat. The locking mechanism comprises a seat plate frame and a back plate frame, wherein the seat plate frame comprises two longitudinal rods and two first cross rods; track grooves are arranged at the opposite sides of the two longitudinal rods; first seal covers are arranged at the front ends of the two longitudinal rods; the back plate frame comprises two vertical rods and at least two second cross rods; and idler wheels matched with the track grooves are arranged at the outer sides of the lower ends of the two vertical rods. The locking mechanism is characterized in that locking plates are arranged between the inner sides of the rear ends of the two vertical rods and the corresponding vertical rods of the back plate frame; one end of the upper edge of each locking plate is hinged with the inner side of the rear end of the corresponding longitudinal rod; a pull rod is connected between the other ends of the upper edges of the two locking plates; tension springs are connected between the inner sides of the locking plates close to connection points at two ends of the pull rod and the rear ends close to the corresponding longitudinal rods; a lower bump is arranged close to the middle position at the lower edge of each locking plate; hooks are arranged at the outer sides of the lower bumps; stop pins are arranged at the outer sides of the lower ends of the two vertical rods; and the stop pins are hooked by the hooks in a locking state. The locking mechanism is easy to operate. By the locking mechanism, the service lifetime of the seat can be prolonged; and the locking mechanism is suitable for a helicopter.

Description

Deployable and collapsible seat locking mechanism

Technical field

The present invention relates to a kind of deployable and collapsible seat. Specifically, be the locking mechanism being fixed for the relieving state of the deployable and collapsible seat on helicopter.

Background technology

At present, its backboard frame of the seat using on helicopter is mostly can folding and unfolding seat, to when needed backboard frame is decontroled into setting shape, while needs, backboard is taken in into parallel with seat horizontal. Wherein, between backboard and seat board abutting end, be all provided with locking mechanism. Traditional locking mechanism is at montant lower end, the both sides of backboard frame and the equal pin hole processing of seat board frame both sides rod rear end correspondingly, in the time that backboard frame converts use state to by income state, first backboard frame is pulled out, and make the pin-and-hole of montant lower end, backboard frame both sides corresponding with the pin-and-hole of seat board both sides rod rear end, insert again pin, realize the locking between backboard frame and seat board frame with this. While converting use state due to backboard frame to by income state, need first backboard frame to be pulled out, and make the pin-and-hole of montant lower end, backboard frame both sides corresponding with the pin-and-hole of seat board frame both sides rod rear end, then insert pin, could realize the locking between backboard frame and seat board frame, operate cumbersome. Realize locking owing to adopting latch to insert pin-and-hole again, between latch and pin-and-hole, gap is larger, makes the two frictional force larger, easily wearing and tearing. Therefore, adopt the seat of this locking mechanism, service life is not long.

Summary of the invention

The problem to be solved in the present invention is to provide a kind of deployable and collapsible seat locking mechanism. This locking mechanism, operates more convenient. Adopt this locking mechanism, can extend the service life of seat.

The problems referred to above that the present invention will solve are realized by following technical scheme:

Deployable and collapsible seat of the present invention comprises for the seat frame of fixing seat with for the backboard frame of stationary backplate with locking mechanism, described seat frame is made up of two vertical poles that are parallel to each other and two the first cross bars that are parallel to each other, all there is rail groove the relative both sides of two vertical poles, the front end of two vertical poles all has the first capping, and one section of the rear end of two vertical poles is all bent upwards and is circular-arc. Described backboard frame is by two montants and at least two rectangular frames that the second cross bar is formed by connecting, spacing between two montant outsides is less than two spacing between vertical pole inner side, all there is roller in the outside of the contiguous lower end of two montants, two rollers are placed in respectively in the rail groove of corresponding vertical pole, and described backboard frame can be taken in into horizontal or decontrol into be similar to and erect shape by rail groove and two rollers. Be characterized in all there is lock banking stop between the rear inside of two vertical poles and the corresponding montant of backboard frame, one of the top of lock banking stop is hinged on the rear inside of corresponding vertical pole by bearing pin, between the other end, top of two lock banking stops, be connected with pull bar, between the lock banking stop inner side of adjacent rod two ends tie point and the adjacent back end of corresponding vertical pole, be all connected with extension spring. All there is lower convexity the following contiguous middle of described lock banking stop, and all there is the crotch towards the bending of vertical pole rear end in the outside of lower convexity. All there is backing pin in the outside of two contiguous its lower ends of montants, and described backing pin is all corresponding with corresponding crotch and all caught on by crotch under lockup state.

As can be seen from the above scheme, owing to being provided with lock banking stop between the rear inside of two vertical poles and the corresponding montant of backboard frame, one of the top of lock banking stop is hinged on the rear inside of corresponding vertical pole by bearing pin, between the other end, top of two lock banking stops, be connected with pull bar, between the lock banking stop inner side of adjacent rod two ends tie point and the adjacent back end of corresponding vertical pole, be all connected with extension spring. All there is lower convexity the following contiguous middle of described lock banking stop, and all there is the crotch towards the bending of vertical pole rear end in the outside of lower convexity. All there is backing pin in the outside of two contiguous its lower ends of montants, and described backing pin is all corresponding with corresponding crotch and all caught on by crotch under lockup state. In the time backboard frame income must being the level of state, as long as hand-pulling pull bar upwards lifts, when spring is stretched, make the bearing pin upwards backward rotation of lock banking stop around one of its top, until the backing pin outside hook and the backboard frame two montant lower ends under lock banking stop is separated, backboard frame can be taken in into horizontal. In the time the relieving of backboard frame must being to upright state, reverse operating above-mentioned steps, operates very convenient. Realize locking owing to inserting pin-and-hole without latch again, avoided gap between latch and pin-and-hole to occur compared with large, the easy abrasion condition of frictional force large and that bring. Therefore, adopt the seat of this locking mechanism, can extend the service life of seat.

Brief description of the drawings

Fig. 1 is deployable and collapsible seat locking mechanism schematic diagram of the present invention;

Fig. 2 is the A-A cross-sectional schematic of Fig. 1.

Detailed description of the invention

As shown in Figure 1 and Figure 2, deployable and collapsible seat of the present invention comprises for the seat frame of fixing seat with for the backboard frame of stationary backplate with locking mechanism, described seat frame is made up of two vertical poles that are parallel to each other 3 and two the first cross bars that are parallel to each other, the relative both sides of two vertical poles 3 are all processed with the rail groove that passes through its overall length, the front end of two vertical poles 3 is all provided with the first capping, and one section of the rear end of two vertical poles 3 is all bent upwards and is circular-arc. Described backboard frame is by two montants 8 and two rectangular frames that the second cross bar 6 is formed by connecting, spacing between two montant 8 outsides is less than two spacing between vertical pole 3 inner sides, the outside of the contiguous lower end of two montants 8 is all provided with roller, two rollers are placed in respectively in the rail groove of corresponding vertical pole 3, and described backboard frame can be taken in into horizontal or decontrol into be similar to and erect shape by rail groove and two rollers. Between the corresponding montant 8 of the rear inside of two vertical poles 3 and backboard frame, be provided with lock banking stop 1, one of the top of lock banking stop 1 is hinged on the rear inside of corresponding vertical pole 3 by bearing pin 2, between the other end, top of two lock banking stops 1, be connected with pull bar 4, between lock banking stop 1 inner side of adjacent rod 4 two ends tie points and the adjacent back end of corresponding vertical pole 3, be all connected with extension spring 5. The following contiguous middle of described lock banking stop 1 is all processed with lower convexity 1-1, and the outside of lower convexity 1-1 is all processed with the crotch 1-2 towards vertical pole 3 rear end bendings. The outside of contiguous its lower ends of two montants 8 is all provided with backing pin 7, and described backing pin 7 is all corresponding with corresponding crotch 1-2 and all caught on by crotch 1-2 under lockup state.

In the time backboard frame income must being the level of state, as long as hand-pulling pull bar 4 upwards lifts, when extension spring 5 is stretched, make the bearing pin 2 upwards backward rotation of lock banking stop 1 around one of its top, until the backing pin 7 outside hook 1-2 and backboard frame two montant 8 lower ends under lock banking stop 1 is separated, backboard frame can be taken in into horizontal. In the time the relieving of backboard frame must being to upright state, reverse operating above-mentioned steps.

Claims (1)

1. deployable and collapsible seat locking mechanism, comprise for the seat frame of fixing seat with for the backboard frame of stationary backplate, described seat frame is made up of two vertical poles that are parallel to each other (3) and two the first cross bars that are parallel to each other, all there is rail groove the relative both sides of two vertical poles (3), the front end of two vertical poles (3) all has the first capping, and one section of the rear end of two vertical poles (3) is all bent upwards and is circular-arc; Described backboard frame is the rectangular frame being formed by connecting by two montants (8) and at least two the second cross bars (6), spacing between two montants (8) outside is less than the spacing between two vertical poles (3) inner side, all there is roller in the outside of the contiguous lower end of two montants (8), two rollers are placed in respectively in the rail groove of corresponding vertical pole (3), and described backboard frame can be taken in into horizontal or decontrol into be similar to and erect shape by rail groove and two rollers; It is characterized in that all there is lock banking stop (1) between the rear inside of two vertical poles (3) and the corresponding montant (8) of backboard frame, one of the top of lock banking stop (1) is hinged on the rear inside of corresponding vertical pole (3) by bearing pin (2), between the other end, top of two lock banking stops (1), be connected with pull bar (4), between lock banking stop (1) inner side of adjacent rod (4) two ends tie point and the adjacent back end of corresponding vertical pole (3), be all connected with extension spring (5); All there is lower convexity (1-1) the following contiguous middle of described lock banking stop (1), and all there is the crotch (1-2) towards vertical pole (3) rear end bending in the outside of lower convexity (1-1); All there is backing pin (7) in the outside of contiguous its lower end of two montants (8), and described backing pin (7) is all corresponding with corresponding crotch (1-2) and all caught on by crotch (1-2) under lockup state.