JP3161820U - Movable backrest structure - Google Patents

Abstract

A movable backrest structure capable of adapting to various sitting postures of a user is provided. In a movable backrest structure, an upper back plate 11 is pivotally disposed in front of the back frame 2 and a lower end of the upper back plate 11 is connected to a lower back plate 12 by an elastic piece 13 so that the lower back plate 12 and the back frame are connected. The two are connected by using the elastic plate 3, and the lower back plate 12 is opposed to the upper back plate 11 and swings back and forth and right and left. [Selection] Figure 1

Description

  The present invention relates to a movable backrest structure, and in particular, the backrest is composed of upper and lower backboard plate structures connected by elastic pieces, the upper backboard is pivoted in front of the backrest frame, and the lower backboard and the backrest. The frames are connected by a resilient plate, and the backrest changes along the back curve of the user and relates to a movable backrest structure that creates a buffering action.

In the structure of a seat chair, the backrest is an important design that supports the back of the human body, and the body shape of each user is different. Therefore, an ergonomic design is required to improve comfort.
In the known technique, adjustment is mainly performed by a structure mounted in the adjuster and the backrest. By adjusting, it is possible to fit the back of a user of a different body type, but if the user does not sit in the same posture, the optimal ergonomic result cannot be obtained. That is, the adjusted backrest state cannot generate a comfortable effect corresponding to a change in how the user sits. Therefore, the user relies on the adjuster, and unless the backrest is always adjusted, the comfort of the seat is not maintained, the operation is troublesome, the failure rate is high, and the user feels tired when sitting for a long time.

The present invention provides a movable backrest structure, and the known backrest design aims to remedy the disadvantage of requiring repeated adjustments.

In the movable backrest structure of the present invention, the upper back plate is pivoted in front of the back frame, the lower end of the upper back plate connects the lower back plate with an elastic piece, and the elastic plate is used between the lower back plate and the back frame. Accordingly, the lower back plate swings back and forth and right and left relative to the upper back plate, and can be adapted to various sitting postures of the user.

  The upper and lower back plates of the present invention are fixedly connected to each other by one end of the elastic piece, and the upper and lower back plates are curved and swinging due to the elasticity and toughness of the elastic piece. The upper back plate supports the back, the lower back plate cushions the waist, and the deformation of the elastic plate is suppressed in accordance with the pressure of the user's waist, the lower back plate is the user's waist Swings back and forth according to the position (automatically forms a support action that adapts to the back curve of different users), and the user changes the sitting posture and only the waist on one side leans against the backrest As the lower back plate also swings to the left and right (within a certain angle range) as the waist rotates, the user's back can maintain the optimal ergonomic support function at any time and obtain comfort. .

1 is a structural diagram of the present invention. 1 is a structural composition diagram of the present invention. It is a composition state figure of the present invention. It is an implementation reference figure of this invention. It is a movable state figure of the lower back board of this invention. It is another structure state figure of this invention.

The present invention provides a movable backrest structure. Mainly, the backrest 1 is formed by connecting an upper back plate 11 and a lower back plate 12 (shown in FIG. 1). The upper end of the upper back plate 11 is located in front of the back frame 2 with the back frame 2 pivoted, and the bottom end of the lower back plate 12 connects the back frame 2 with the elastic plate 3 (shown in FIG. 2). )
The backrest 1 is divided into an upper back plate 11 and a lower back plate 12, and the bottom end of the upper back plate 11 and the top end of the lower back plate 12 are fixed and connected by an elastic piece 13 (the elastic piece 13 is elastic). And tough materials, eg, rubber).
The back frame 2 is a Y-shaped frame body, and the bottom end is joined to the chair portion to become a support frame (shown in FIG. 3), and a buffer block 21 is installed corresponding to the bottom edge of the upper back plate 11. is doing.
Due to the above-described elements, the upper end of the upper back plate 11 extends rearward with the protruding ears 111 and is pivotally connected to the corresponding pivot hole 22 of the back frame 2. Further, between the bottom end of the lower back plate 12 and the backrest frame 2, one end of the elastic plate 3 is fixed, the lower back plate 12 bends forward by the support of the elastic plate 3, and the backrest 1 is the backrest. The bottom of the upper back plate 11 has a tendency to protrude relative to the frame 2 (the bottom end of the upper back plate 11 is bent by the forward curve of the lower back plate 12 and has a distance from the back frame 2). Complete.
Therefore, when the user is seated and the back is leaned against the backrest 1 of the present invention, the upper back plate 11 supports the back of the user (the upper back plate 11 is supported by the elastic plate 3 of the lower back plate 12, When the forward / backward swing buffer is generated and the applied force is excessive, the buffer block 21 of the backrest frame 2 is directly deformed by receiving the force to buffer the pressure of the upper back plate 11). The lower back plate 12 directly corresponds to the user's lower back curve and pressure, and the swinging back and forth controls the elastic plate 3 to deform (shown in FIG. 4). Therefore, the entire backrest 1 automatically corresponds to the back curve of the user and generates an adjustment action, so that the user can feel the comfort of ergonomics. In addition, when the user's seating method leans on the backrest 1 so as to rotate sideways, the lower back plate 12 also swings left and right with the rotation of the user's waist (shown in FIG. 5). Thus, within a certain angle range, the lower back plate 12 bends to the left and right relative to the upper back plate 11 by the elastic piece 13, and the elastic plate 3 elastically moves with the rotation of the lower back plate. The lower back plate 12 wraps around the user's waist and achieves a support effect, so that even if sitting for a long time, it is difficult to feel fatigue, and the backrest 1 exhibits the support effect sufficiently, Can maintain spine health and comfort.
Further, in order to further improve the coupling force between the elastic piece 13 and the upper and lower back plates 11, 12, the elastic piece 13 has a plurality of protrusions 131 and is fitted into the fitting tank 101 of the upper and lower back plates 11, 12. , Fix.
Further, the support frame 41 of the head mat 4 is coupled and fixed above the back frame 2 of the present invention (FIG. 6), and the seat chair can support the head and the back.
In the present invention, preferred embodiments have been disclosed as described above. However, these are not intended to limit the present invention, and any person who is familiar with the technology can use various methods within the spirit and scope of the present invention. Therefore, the protection scope of the present invention is based on the contents specified in the claims of the utility model.

DESCRIPTION OF SYMBOLS 1 Backrest 11 Upper back plate 111 Convex ear 12 Lower back plate 13 Elastic piece 131 Protrusion 101 Fitting tank 2 Backrest frame 21 Buffer block 22 Pivoting hole 3 Resilient plate 4 Head pad 41 Bearing rod

Claims (4)

A movable backrest structure, wherein the backrest is formed by connecting an upper back plate and a lower back plate, and an upper end of the upper back plate is located in front of the back frame, pivotally connected to a back frame, and The bottom end of the lower back plate connects the back frame by the elastic plate,
The backrest is fixed by an elastic piece between the bottom end of the upper back plate and the top end of the lower back plate, the lower back plate is bent forward by the support of the elastic plate, and the backrest and the backrest frame A movable backrest structure characterized by having a buffer distance between them. The movable backrest structure according to claim 1, wherein the elastic piece has a plurality of protrusions, and is fitted into and fixed to a fitting tank of the upper and lower back plates. 2. The backrest frame according to claim 1, wherein the back frame is a Y-shaped frame, the bottom end is coupled to a chair portion to form a support frame, and a buffer block is installed corresponding to the bottom edge of the upper back plate. The described movable backrest structure. The movable backrest structure according to claim 1, wherein a support rod of a head mat is coupled and fixed above the backrest frame.

Images