Freely assemblable toy track

1. A freely assemblable toy track, comprising a plurality of guide rails and connecting pieces, wherein each guide rail comprises two independent strip rails ( 1 ) at the left and right, each connecting piece is configured as a frame piece ( 2 ) provided with a connecting part at a corresponding position of an inner frame edge for connecting with an end of each strip rail ( 1 ), a front guide rail and a rear guide rail are connected through the frame piece ( 2 ) to form a track body having a track surface with a middle portion hollowed,

wherein the strip rail ( 1 ) has an L-shaped section, and the frame piece ( 2 ) is configured as a square frame body or a U-shaped frame body correspondingly, and

wherein the connecting part of the frame piece ( 2 ) is configured as grooves ( 21 ) provided in two adjacent inner frame edges of an inner frame corner, and two end portions of the strip rail ( 1 ) are provided with raised lines ( 11 ) protruding outwards and inserted into the grooves ( 21 ) correspondingly.

2. The freely assemblable toy track according to claim 1 , wherein the connecting part of the frame piece ( 2 ) is configured as supporting plates ( 22 ) protruding from two adjacent inner frame edges of an inner frame corner, and two supporting plates ( 22 ) form a corner position where the strip rail ( 1 ) is inserted together with the inner frame corner where the two supporting plates ( 22 ) are located.

3. The freely assemblable toy track according to claim 1 , wherein the connecting part of the frame piece ( 2 ) is configured as blocking edges ( 23 ) protruding and provided on two adjacent outer frame edges of an outer frame corner, each end portion of the strip rail ( 1 ) is correspondingly provided with a corner inserting plate ( 13 ) protruding outwards, the corner inserting plate has a size consistent with that of a corner position formed by the blocking edges ( 23 ) and the outer frame corner, and an inner frame edge of the frame piece ( 2 ) is flush with a track surface of the strip rail ( 1 ) after the corner inserting plate ( 13 ) is inserted into the corner position.

4. The freely assemblable toy track according to claim 1 , wherein an outer frame edge of the frame piece ( 2 ) is provided with a butt joint part configured as a half I-shaped insertion position ( 24 ).

5. The freely assemblable toy track according to claim 4 , wherein two frame pieces ( 2 ) are aligned with each other and combined to form an I-shaped insertion position, and the two frame pieces ( 2 ) are butted to form a double-track body or a multi-track body by inserting an I-shaped inserting piece ( 3 ) into the I-shaped insertion position.

6. The freely assemblable toy track according to claim 1 , further comprising a supporting rod ( 4 ), wherein the frame piece ( 2 ) is provided with a connecting part at an outer frame edge for connecting with the supporting rod ( 4 ), and the supporting rod ( 4 ), the frame piece ( 2 ) and the guide rails cooperate to assemble a three-dimensional track body.

7. The freely assemblable toy track according to claim 6 , wherein the connecting part of the frame piece ( 2 ) is configured as a half I-shaped insertion position ( 24 ), and two ends and/or a rod body of the supporting rod ( 4 ) are provided with II-shaped inserting pins ( 41 ) fitted with the half I-shaped insertion position ( 24 ) in through insertion.

8. The freely assemblable toy track according to claim 1 , wherein two end portions of the strip rail ( 1 ) are provided with resilient snaps ( 15 ), and the connecting part of the frame piece ( 2 ) is correspondingly provided with snap holes ( 25 ) where the snap ( 15 ) are snapped.

9. A freely assemblable toy track, comprising a plurality of guide rails and connecting pieces, wherein each guide rail comprises two independent strip rails ( 1 ) at the left and right, each connecting piece is configured as a frame piece ( 2 ) provided with a connecting part at a corresponding position of an inner frame edge for connecting with an end of each strip rail ( 1 ), a front guide rail and a rear guide rail are connected through the frame piece ( 2 ) to form a track body having a track surface with a middle portion hollowed,

wherein the strip rail ( 1 ) has an L-shaped section, and the frame piece ( 2 ) is configured as a square frame body or a U-shaped frame body correspondingly, and

wherein the connecting part of the frame piece ( 2 ) is configured as blocking edges ( 23 ) protruding and provided on two adjacent outer frame edges of an outer frame corner, each end portion of the strip rail ( 1 ) is correspondingly provided with a corner inserting plate ( 13 ) protruding outwards, the corner inserting plate has a size consistent with that of a corner position formed by the blocking edges ( 23 ) and the outer frame corner, and an inner frame edge of the frame piece ( 2 ) is flush with a track surface of the strip rail ( 1 ) after the corner inserting plate ( 13 ) is inserted into the corner position.

10. A freely assemblable toy track, comprising a plurality of guide rails and connecting pieces, wherein each guide rail comprises two independent strip rails ( 1 ) at the left and right, each connecting piece is configured as a frame piece ( 2 ) provided with a connecting part at a corresponding position of an inner frame edge for connecting with an end of each strip rail ( 1 ), a front guide rail and a rear guide rail are connected through the frame piece ( 2 ) to form a track body having a track surface with a middle portion hollowed,

wherein an outer frame edge of the frame piece ( 2 ) is provided with a butt joint part configured as a half I-shaped insertion position ( 24 ), and

wherein two frame pieces ( 2 ) are aligned with each other and combined to form an I-shaped insertion position, and the two frame pieces ( 2 ) are butted to form a double-track body or a multi-track body by inserting an I-shaped inserting piece ( 3 ) into the I-shaped insertion position.