Mechanical stretching device for movable sofa
The technology of a stretching device and an electric device, which is applied to sofas, couchs, beds, etc., can solve the problems of poor synchronization, high manufacturing difficulty and high maintenance costs, and achieve the effects of good stability, low maintenance costs and convenient assembly.
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[0018] Below in conjunction with accompanying drawing, the present invention is further described:
[0019] A mechanical stretching device for a movable sofa, including an electric device and a mechanical stretching device. Connecting rod 6, connecting piece D 7, pivot a8, lower driving connection A 9, lower driving connecting B 10, pivot b11, bracket 12, crank 13, third connecting rod 14, back driving rod 15, fourth connecting rod 16. Plate buckle A17, first transmission rod 18, L-shaped angle iron armor 19, connector 20, hub 21, connecting piece A 22, second transmission rod 23, plate buckle B24, connecting piece B 25, third transmission rod 26 , the fourth drive rod 27, the rear drive square tube 28, the connecting piece C 29, the front drive square tube 30, the welding piece 31, the L-shaped angle iron B 32, the bending tube 33, the welding piece 31 and the front drive square tube 30 Rotational connection, the front drive square tube 30 is connected with the L-shaped angl...
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