CN201494548U

CN201494548U - Movable backrest of electric bicycle

Info

Publication number: CN201494548U
Application number: CN2009201772210U
Authority: CN
Inventors: 杨云文
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-29
Filing date: 2009-08-29
Publication date: 2010-06-02
Anticipated expiration: 2019-08-29

Abstract

The utility model relates to a movable backrest of an electric bicycle, The movable backrest comprises a seat cushion and a backrest, wherein the seat cushion is arranged on a bicycle frame, both sides under the seat cushion are respectively provided with a left support base and a right support base of the backrest, a rotary sleeve and a rotary shaft are arranged between the left support base and the right support base, one side of the rotary sleeve is provided with an inclined-cut bayonet, the rotary shaft can rotate in the rotary sleeve and is provided with a positioning step, a through hole is in the rotary shaft, one end of the rotary shaft is provided with a bayonet, the other end of the rotary shaft is provided with an internal thread and screwed with a screw, a push rod and a spring are arranged in the through hole, the push rod is a round rod with a shaft shoulder and extends into the bayonet of the through hole, the shaft shoulder of the push rod pushes the bayonet of the through hole, and the spring is arranged between the screw and the push rod. The middle of the rotary shaft is provided with a long slot, the push rod is provided with a pin, and the pin extends out of the long slot of the rotary shaft and is on the inclined-cut bayonet of the rotary sleeve. Because the technical scheme is used, and the backrest is arranged on the seat cushion and can be inward or outward folded for convenient use and being helpful to eliminate the riding fatigue of the rider.

Description

The Electrical Bicycle movable back

Technical field

The utility model relates to the annex of Electrical Bicycle, particularly a kind of Electrical Bicycle movable back.

Background technology

Usually Electrical Bicycle does not generally have backrest, therefore, rides Electrical Bicycle fatigue easily for a long time, and it is stiff to form waist, increases the potential safety hazard of driving.Also have the part Electrical Bicycle also to design backrest, yet cannot fold, also there is blemish in an otherwise perfect thing in this method.

The utility model content

The purpose of this utility model is at the deficiencies in the prior art, and a kind of movable back of Electrical Bicycle is provided, can be inside or folded-out it, the backrest that can conveniently install and use helps laborsaving by bike and to eliminate driving tired.

The purpose of this utility model is to realize by such technical scheme, the Electrical Bicycle movable back, comprise seat cushion, backrest, seat cushion is installed on the vehicle frame, both sides are respectively equipped with the left side of backrest under the seat cushion, right support abutment, a left side, be provided with pivoted housing and rotating shaft between right support abutment and seat cushion, on one side pivoted housing is provided with the bayonet socket of cutting sth. askew, rotating shaft can be rotated in pivoted housing, rotating shaft is provided with positioning step, is through hole in the rotating shaft, and an end is provided with bayonet socket, the other end is provided with negative thread, and be rotary with screw, be provided with in the through hole and go back push rod, spring, push rod are the round bar of tape spool shoulder, and push rod puts in the bayonet socket of through hole, the shaft shoulder of push rod withstands on the bayonet socket of through hole, and spring is located between screw and the push rod; The middle part of rotating shaft is provided with elongated slot, is provided with pin on push rod, and pin stretches out the elongated slot of rotating shaft, is positioned at the bayonet socket place of cutting sth. askew of pivoted housing.During use, pivoted housing is fixed on left and right bearing, and rotating shaft is fixing on cushion.

At initial condition, because the effect of spring, pin is stuck in the bayonet socket position of cutting sth. askew of pivoted housing, and backrest can not rotate backward, and just can realize the use of backrest; When backrest inwardly pushes away,, just can realize that backrest is inwardly folding because the inclined-plane forward of the bayonet socket of cutting sth. askew is released the bayonet socket position of cutting sth. askew to pin; When promoting push rod, can release the bayonet socket of cutting sth. askew to pin equally, just can realize outer dorsad folding.

The beneficial effects of the utility model are: owing to adopted technique scheme, backrest is installed on cushion, can be inside or folded-out it, easy to use, it is tired to help the cyclist to eliminate driving.

Description of drawings

Below in conjunction with drawings and Examples utility model is further specified.

Fig. 1 is the structural representation of the utility model embodiment at the backrest state.

Fig. 2 is the structural representation of the utility model embodiment at the folded-out state of backrest.

Fig. 3 is the structural representation of the utility model embodiment at the inside folded state of backrest.

Fig. 4 is the utility model embodiment rotating shaft profile scheme drawing.

Fig. 5 is the utility model embodiment rotating shaft profile scheme drawing.

Fig. 6 is the utility model embodiment pivot structure scheme drawing.

Among the figure: 1, backrest 2, bearing 3, seat cushion 4, pivoted housing 5, rotating shaft 6, screw 7, push rod 8, pin 9, spring 10, captive nut 11, elongated slot 12, the bayonet socket 13 of cutting sth. askew, positioning step 14, bayonet socket 15, the shaft shoulder

The specific embodiment

Below in conjunction with Fig. 1 to Fig. 6 drawings and Examples the utility model is made further non-limiting description:

In Fig. 1, Fig. 2 and Fig. 3, the Electrical Bicycle movable back, comprise seat cushion 3, backrest 1, seat cushion 3 is installed on the vehicle frame, both sides are respectively equipped with the left and right bearing 2 of backrest under the seat cushion 3, are provided with pivoted housing 4 and rotating shaft 6 between left and right bearing 2 and seat cushion, among Fig. 5, pivoted housing 4 is provided with the bayonet socket 12 of cutting sth. askew on one side, and rotating shaft 5 can be rotated in pivoted housing 4; Among Fig. 4, Fig. 5, rotating shaft 6 is provided with positioning step 13, in the rotating shaft 6 is through hole, one end is provided with bayonet socket 14, the other end is provided with negative thread, and is rotary with screw 6, is provided with in the through hole to go back push rod 7, spring 9, push rod 7 is the round bar of tape spool shoulder 15, push rod 7 puts in the bayonet socket of through hole, and the shaft shoulder 15 of push rod 7 withstands on the bayonet socket 14 of through hole, and spring 9 is located between screw 6 and the push rod 7; The middle part of rotating shaft 5 is provided with elongated slot 11, is provided with pin 8 on push rod 7, and pin 8 stretches out the elongated slot 11 of rotating shaft 5, is positioned at bayonet socket 12 places of cutting sth. askew of pivoted housing 4.During use, pivoted housing 4 is weldingly fixed on left and right bearing 2 times, and rotating shaft 5 is welded with nut 10, is fixed on the seat cushion 3 with screw rod.

As shown in Figure 1, at initial condition, because the effect of spring 9, pin 8 is stuck in bayonet socket 12 positions of cutting sth. askew of pivoted housing 4, and backrest 1 can not rotate backward, and just can realize the use of backrest; As shown in Figure 3, when backrest 1 inwardly pushes away,, just can realize that backrest is folding in 1 because the inclined-plane forward of the bayonet socket 12 of cutting sth. askew is released bayonet socket 12 positions of cutting sth. askew to pin 8; As shown in Figure 2,, can release the bayonet socket 12 of cutting sth. askew to pin 8 equally, just can realize 1 outer folding dorsad when the push rod 7 that promotes two.The utility model backrest is inwardly folding, and when summer, sunlight was exposed to the sun, 1 pair of seat cushion 3 of backrest had the certain protection effect.

At last, it is also to be noted that what more than enumerate only is specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from disclosed content of the present utility model all should be thought protection domain of the present utility model.

Claims

1. Electrical Bicycle movable back, comprise seat cushion, backrest, seat cushion is installed on the vehicle frame, both sides are respectively equipped with the left side of backrest under the seat cushion, right support abutment, a left side, be provided with pivoted housing and rotating shaft between right support abutment and seat cushion, it is characterized in that pivoted housing is provided with the bayonet socket of cutting sth. askew on one side, rotating shaft can be rotated in pivoted housing, and rotating shaft is provided with positioning step, in the rotating shaft is through hole, one end is provided with bayonet socket, the other end is provided with negative thread, and is rotary with screw, is provided with in the through hole and goes back push rod, spring, push rod is the round bar of tape spool shoulder, push rod puts in the bayonet socket of through hole, and the shaft shoulder of push rod withstands on the bayonet socket of through hole, and spring is located between screw and the push rod; The middle part of rotating shaft is provided with elongated slot, is provided with pin on push rod, and pin stretches out the elongated slot of rotating shaft, is positioned at the bayonet socket place of cutting sth. askew of pivoted housing.