Enclasping mechanism, and pedal device of chair

Abstract

The invention discloses an enclasping mechanism, and a pedal device of a chair. The enclasping mechanism comprises a main shaft, an inner sleeve and an outer sleeve; a plurality of trench grooves are arranged in the upper end of the inner sleeve to form a plurality of circumferentially distributed fins, grooves are respectively arranged in two sides of the external surface of every fin, a briquette is arranged in every trench groove, clamping feet are respectively arranged at the left side and the right side of every briquette, the clamping feet are arranged in the grooves, a rubber sheet is inlaid in the internal surface of every briquette, and the external surface of every briquette is sloping; and the outer sleeve has oblique an inner hole cooperating with the gradient of the external surfaces of the briquettes, the upper end of the inner sleeve is inserted to the inner hole of the outer sleeve, and when the inner sleeve moves upward or the outer sleeve moves downward, the outer sleeve extrudes the briquettes to make the briquettes inward press the rubber sheets in order to make the rubber sheets closely applied to the main shaft. The briquettes are not rooted in the inner sleeve and are movable freely, and the whole briquettes and the rubber sheets are forced to move to the center in parallel when the oblique surfaces cooperate, so the up-and-down cohesion force of the briquettes and the rubber sheets is uniform.

Description

technical field [0001] The invention relates to the technical field of swivel chairs and office chairs, in particular to a clinging mechanism and a foot pedal device for chairs. Background technique [0002] Existing chairs, especially children's chairs, usually have a circular footrest, which is connected to the central sleeve through the bracket, and the central sleeve and the air rod (also called the main shaft) are tightly held and fixed. The design adopts a single-point compression fixing method, that is, the center sleeve is used to match the C-shaped sleeve, and a threaded hole is opened on the center sleeve, and the knob with the screw rod is inserted into the threaded hole and gradually tightened. When the knob is tightened, the C-shaped sleeve is squeezed to force it to be fixed on the air rod. This fixing method is not only complicated and laborious in rotating and locking, but also has the following disadvantages: The C-shaped sleeve is made of rubber material, a...

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Problems solved by technology

[0002] Existing chairs, especially children's chairs, usually have a circular footrest, which is connected to the central sleeve through the bracket, and the central sleeve and the air rod (also called the main shaft) are tightly held and fixed. The design adopts a single-point compression fixing method, that is, the center sleeve is used to match the C-shaped sleeve, and a threaded hole is opened on the center sleeve, and the knob with the screw rod is inserted into the threaded hole and gradually tightened. When the knob is tightened, the C-shaped sleeve is squeezed to force it to be fixed on the air rod. This fixing method is not only complicated and laborious in rotating and locking, but also has the following disadvantages: The C-shaped sleeve is made of rubber material, and only the The design of the rubber material can tighten the air rod. When the knob is pressed against the C-shaped sleeve, it will cause damage to the surface of the C-shaped sleeve, and the tightening function will be lost after long-term use; moreover, it will Indirect pressure on the air rod will cause the deformation of the air rod, which will affect the lifting function of the round pedal ring; what's more, it will cause the round pedal and the bracket to tilt and shake, which is dangerous when using

[0004] The above-mentioned clamping mechanism can also be applied to the pedal device of a chair, so that it changes from a single-point clamping method to a circumferential clamping mode, but compared with a hollow tube, the pedal device directly connects the feet and legs of a person. , it is obvious that the weight it bears is much heavier, and the air rod is smooth, the friction between the pressure plate 213 and the air rod is not enough, and the pedal device will fall, so it cannot meet the requirements of testing and use; consider A rubber sheet is installed on the inner surface of the pressure plate to increase friction, but the effect is still not ideal, because one end of the pressure plate is fixed on the linear compression element, and the other end of the pressure plate is a free end. When the inclined surface of the cylinder is pressed and fitted, the deformation of the pressure plate will be different, that is, the deformation of the free end will be larger than that of the fixed end, resulting in the holding force of the fixed end being smaller than that of the free end. The holding force is uneven up and down, and the holding effect is not good enough. not very stable

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