CN113015464B - Improved movement mechanism for moving movable parts of a reclining sofa or reclining chair - Google Patents

Abstract

The present invention discloses an improved motion mechanism for moving a reclined sofa or recliner with a cushion, comprising: a frame for supporting a hinged extendable arm unit, said extendable arm unit being driven by a drive unit, said extendable arm unit supporting a bracket, said bracket supporting said inclined portion, said frame comprising two longitudinal members, said two longitudinal members being fixedly connected to a cross member to form a quadrilateral; the extendable arm apparatus comprises: the large flat plate is adaptively arranged on the frame of the sofa; the guide plate is connected to the bracket, a hollow slit is formed in the guide plate, a plug is arranged in the hollow slit, and the plug is mounted at the tail end of the guide plate and can slide; the plug is connected to a lever assembly mechanically connected to the cross member by a pair of pivotally connected flexures; and springs mounted between both ends of the cross member and the large flat plate.

Description

Improved movement mechanism for moving movable parts of a reclining sofa or reclining chair

Technical Field

The present invention relates to an improved motion mechanism. The present invention is suitable for use on a sofa or reclining chair or similar mechanism, which is provided with a movable part, such as a headrest/backrest or similar parts. The following description will be explained with a detailed example, but not limited to this example. The present invention is to move such a movable part from a closed position to an extended open position (corresponding to a structure for resting the user's head).

Background technique

Typically, in order to accomplish the motion of moving a component such as a headrest of a sofa or recliner, it is generally necessary to use a generally quadrilateral shaped mechanism such as defined by a rod or extendable arm.

These mechanisms are mounted directly on the frame of the sofa or recliner and include a drive mechanism mechanically connected to opposite side ends of the rod of the mechanism to extend or retract the rod or arm to or from the open state. An electric actuator is connected to the drive mechanism for sending instructions to the drive mechanism.

Currently, the above-mentioned drive mechanism is composed of pneumatic actuator cylinders, each of which is mechanically connected to the above-mentioned articulated quadrilateral mechanism and is arranged to be connected to opposite sides of the quadrilateral mechanism.

Summary of the invention

The main object of the present invention is to provide an improved movement mechanism which eliminates the serious problems associated with user safety due to cutting, crushing and/or shearing of the user's upper limbs or hands during movement of the above-mentioned movable parts.

Another object of the present invention is to provide an improved kinematic mechanism that is easier to construct and assemble and that does not affect the aesthetic structure of the sofa or recliner after installation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a side view of an improved movement mechanism for moving a movable part of a reclining sofa or reclining chair in a closed state according to the present invention;

FIG2 is a perspective view of the motion mechanism of FIG1 ;

FIG3 is a side schematic diagram of the motion mechanism of FIG1 in an open state;

FIG4 is a perspective view of the motion mechanism of FIG3 ;

FIG5 is a front view of the motion mechanism of FIG1 ;

FIG6 is another perspective view of the motion mechanism of FIG1 ;

FIG7 is another perspective view of the motion mechanism of FIG3 ;

FIG8 is a larger structure of the motion mechanism of FIG7;

FIG. 9 is a schematic structural diagram of a reclining sofa or reclining chair with an improved movement mechanism provided by the present invention.

Detailed ways

Through the contents of the specification, combined with the detailed description of the drawings in the specification, the advantages of the structure and functional characteristics of the present invention over the prior art will become increasingly obvious. The specification describes a preferred embodiment of a motion mechanism for moving the movable parts of a reclining sofa or a reclining chair, but is not limited to this embodiment.

1 to 9, M as a whole represents a motion mechanism for moving a component, which may be a headrest or a backrest H of a reclining sofa D.

The kinematic mechanism M is of a known generally quadrilateral shape, consisting of a plurality of articulated arms which are arranged to rotate relative to one another and which are mounted on a frame T adapted to be mounted inside the sofa D.

The motion mechanism M comprises two longitudinal members L1 and L2, which are shaped like plates, and in particular have a curved shape as shown in Figures 1-4. The two longitudinal members L1 and L2 are connected and fixed to three transverse members BT1, BT2 and BT3 to form a quadrilateral structure S. Among them, the transverse member BT1 is located below the transverse member BT2.

The two longitudinal members L1 and L2 are mounted on two sets of extendable arm arrangements G1 and G2 respectively, consisting of mutually spaced articulated extendable arms B1 and B2, to form movable brackets J1 and J2 suitable for supporting a reclining headrest H of a sofa D.

The anchoring and fixing point/seat of the end of the power cylinder CA is set at the center position of the two cross members BT1 and BT3 on the frame T.

The power cylinder CA is unique. It is fixed in the perfect center position of the movement mechanism M and works in this center position. It can determine the movement of the articulated extendable arms B1 and B2 to drive the movement of the headrest/backrest H of the sofa D, that is, from a closed position (as shown in Figures 1 and 2) to an extended and open position (as shown in Figures 3 and 4). When the user uses it, his head also moves accordingly.

Referring to Figure 8, each of the above mentioned groups (G1 and G2) contains the following structure:

Large flat plates P1 and P2 are adapted to be mounted on the frame of sofa D;

Guide plates K1 and K2, connected to brackets J1 and J2;

The guide plates K1 and K2 are provided with hollow slits S1 and S2, and plugs W1 and W2 are provided in the hollow slits S1 and S2; one end of the plugs W1 and W2 is fixed to the guide plates K1 and K2; the other end of the plugs W1 and W2 is connected to the rod devices Y1 and Y2, and the plugs W1 and W2 are slidable;

The rod devices Y1 and Y2 are mechanically connected to the cross member BT3 (to support the brackets J1 and J2) through a pair of rotationally connected bends N1 and N2;

Springs SM1 and SM2 are provided, which are connected to both ends of the cross member BT2 and ends of the large plates P1 and P2, respectively.

When in use, the driving device CA is turned on to put the groups G1 and G2 into motion, driving the brackets J1 and J2 to move the headrest H from a closed position to an open position.

The arrangement of the springs SM1 and SM2 of the groups G1 and G2 has the advantage of allowing a safe automatic return to the closed position when an obstacle is encountered or the user's hand is between the arms B1 and B2 of the groups G1 and G2.

Therefore, when the headrest/backrest H is in an open/extended posture, the groups G1 and G2 formed by the arms B1 and B2 are hidden from the sight of the user of the sofa D, preventing the user's hands from being accidentally injured between the arms B1 and B2, thereby ensuring the user's safety without affecting the aesthetic structure of the sofa D.

Claims (3)

1. An improved motion mechanism (M) for moving the inclined portion (H) of a reclining sofa (D) or a reclining chair with a cushion, characterized in that the motion mechanism (M) comprises: a frame (T) for supporting an articulated extendable arm device (G1, G2), the extendable arm device (G1, G2) being driven by a power cylinder (CA), the anchoring and fixing points of the ends of the power cylinder (CA) being arranged at the center positions of two transverse members (BT1), (BT3) on the frame (T), the extendable arm device (G1, G2) supporting brackets (J1, J2), the brackets (J1, J2) being used to support the inclined portion (H), the frame (T) comprising two longitudinal members (L1, L2), the two longitudinal members (L1, L2) being connected and fixed to the transverse members (BT1, BT2, BT3), the transverse member (BT1) being located below the transverse member (BT2) to form a quadrilateral structure (S); The extendable arm device (G1, G2) comprises: Large flat plates (P1, P2) adapted to be mounted on the frame of the sofa; A guide plate (K1, K2) connected to the bracket (J1, J2), the guide plate (K1, K2) being provided with a hollow slit (S1, S2), a plug (W1, W2) being provided in the hollow slit (S1, S2), one end of the plug (W1, W2) being fixed to the guide plate (K1, K2); the other end of the plug (W1, W2) being connected to a rod device (Y1, Y2), and the plug (W1, W2) being slidable, and the rod device (Y1, Y2) being mechanically connected to the transverse member (BT3) via a pair of rotatably connected bending members (N1, N2); Springs (SM1, SM2), the springs (SM1, SM2) are respectively connected to the two ends of the cross member (BT2) and the ends of the large plates (P1, P2). 2. The improved motion mechanism according to claim 1 is characterized in that the extendable arm device (G1, G2) is composed of two sets of hinged extendable arms (B1, B2), and the two sets of extendable arms (B1, B2) are arranged in parallel and parallel to the two longitudinal members (L1, L2). 3. The improved motion mechanism according to any one of claims 1 to 2, characterized in that the inclined portion (H) comprises a headrest (H) of the sofa (D).