Movable backrest

Abstract

A movable backrest comprises a backrest supporting frame and a backrest cushion movably connected with the backrest supporting frame, and is characterized in that the backrest supporting frame comprises two pipe connecting pieces symmetrically arranged in parallel and vertical flat strips connected with the pipe connecting pieces, and a connecting belt is connected between the two vertical flat strips; the back cushion comprises a supporting face cushion and a connecting structure on the back, and the connecting structure comprises a hook-and-loop fastener or a snap fastener or a tying rope. Velcro tapes or snap fasteners are connected to the vertical flat strips or the connecting belts or the transverse flat strips of the backrest supporting frame and can be correspondingly connected with the Velcro tapes or snap fasteners behind the backrest cushion at the corresponding positions. The movable backrest has the advantages of simple structure and low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a movable backrest, especially used in a backrest chair which needs to adjust the height of the backrest frequently. BACKGROUND

[0002] In order to make the rider more comfortable during long-term work, the present application has invented a motorcycle backrest chair (patent application number 2023114111403), which can slide and extend the upper backrest, which needs to be adjusted frequently. Therefore, when the upper backrest slides down, the cushion on the upper backrest will overlap the lower backrest, and when the upper backrest slides up, the cushion on the upper backrest needs to be used as a "headrest pad" to bear the head force. The invention needs to use a whole piece of board as a cushion, but the whole piece of board will be too high in cost and not very breathable, so a movable backrest with low cost and simple structure is invented here to adapt to this situation. SUMMARY

[0003] In view of the above problems, the present application provides a movable backrest for such telescopic backrest chairs. The movable backrest comprises a backrest support frame and a backrest pad movably connected thereto; wherein the backrest support frame comprises two pipe connectors arranged symmetrically and in parallel, and vertical bars connected with the pipe connectors, and a connecting belt connected between the two vertical bars; wherein the backrest pad comprises a support surface pad and a connecting structure connected behind the support surface pad and movably connected with the backrest support frame.

[0004] Preferably, the connecting belt is an elastic belt or a strap, wherein the strap comprises a soft belt and a buckle.

[0005] Preferably, the pipe connector is a pipe clamp or a magic tape loop.

[0006] Preferably, the connecting structure behind the support surface pad comprises a magic tape or a snap or a tether.

[0007] Preferably, the two vertical bars of the backrest support frame are connected with a horizontal bar.

[0008] Preferably, the length of the horizontal bar can be supported on the chair backrest pipe.

[0009] Preferably, the vertical bar, the connecting belt or the horizontal bar of the backrest support frame is connected with a magic tape or a snap, which can be connected with the magic tape belt or the snap behind the backrest pad at the corresponding position.

[0010] Preferably, the material of the vertical bar and the horizontal bar is carbon fiber, spring steel or glass fiber.

[0011] Preferably, in some cases, a fixed pocket is connected behind the backrest pad to fix the vertical bar.

[0012] Preferably, the support surface of the backrest cushion comprises a soft pad made of a stack of various materials. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0014] Figure 1 is a perspective view of the embodiment 1 of the movable backrest in use;

[0015] Figure 2 is a perspective view of the embodiment 1 of the movable backrest in use;

[0016] Figure 3 is a perspective view of the embodiment 1 of the movable backrest in use;

[0017] Figure 4 is a perspective view of the embodiment 1 of the movable backrest in use;

[0018] Figure 5 is a perspective view of the embodiment 2 of the movable backrest in use;

[0019] Figure 6 is a perspective view of the embodiment 2 of the movable backrest in use;

[0020] Figure 7 is a perspective view of another backrest cushion of the present application. DETAILED DESCRIPTION

[0021] The present application will be further described below with reference to the drawings.

[0022] Figure 1 The use of the movable backrest of example 1 is shown fixed to the backrest 9 of a recliner chair, the movable backrest comprising a backrest support frame 1 and a backrest cushion 2 movably connected thereto. The backrest 9 of the recliner chair comprises an upper backrest 91 which is a U-shaped metal profile which can slide in tubes on both sides of a lower backrest 92, the backrest support frame 1 being fixed to the upper crossbar of the upper backrest 91 by means of an upper tube connection, so that the entire movable backrest can slide up and down with the headrest tube 91. When slid down, the movable backrest will overlap the lower backrest 92, and when slid to the topmost position, the movable backrest needs to be supported by a certain force, such as the weight of the head when sleeping.

[0023] Figure 2A perspective view of the movable backrest of Example 1 is shown. Viewed from the rear, it provides a clearer view of how the backrest support frame 1 and the backrest cushion 2 are movably connected. The backrest cushion 2 includes a support surface pad 21 and a Velcro strap 22 attached to its back. When folded, the hooks and loops of the Velcro strap 22 are glued together and secured to the backrest support frame 1 (e.g., ...). Figure 3 The backrest cushion 2 is fixed by connecting the strap 13 and the horizontal flat strip 14 (or tied to the vertical flat strip 12).

[0024] Figure 3 The backrest support 1 shown in Example 1 includes symmetrically arranged tube clamps 11. The tube clamps 11 are preferably intermittently fitted with the tubes of the upper backrest to which they are connected, allowing the entire backrest support 1 to swing around the tubes at a certain angle. Vertical flat strips 12 are connected to the tube clamps 11 via rivets 15 (or screws). A belt 13 is connected above the two vertical flat strips 12 via rivets 15. The belt 13 includes a flexible strap 131 and a belt buckle 132. Here, "belt" is a general term, simply referring to a flexible strap and a buckle connection structure. The flexible strap can be made of leather, polyester, canvas, etc., and the buckle can take many forms, including various belt buckles and snap fasteners. Of course, the belt can also be an elastic belt, or a combination of an elastic belt and a buckle.

[0025] A horizontal flat strip 14 is connected below the vertical flat strip 12. The horizontal flat strip 14 facilitates the fixing of the backrest cushion 2, and its longer length can support the tubes on both sides of the backrest 9, bearing some of the support force. Carbon fiber sheets are preferred for these flat strips due to their high strength and toughness; spring steel sheets or fiberglass sheets can also be used. In particular, the connections between the vertical flat strip and the connecting strip, and between the vertical flat strip and the horizontal flat strip, are best made using countersunk head rivets or flathead rivets to reduce thickness. In practice, the vertical flat strip 12 and the horizontal flat strip 14 can be integrated, for example, by stamping and cutting from a single piece of carbon fiber sheet, or by welding spring steel sheets together, although this would be more expensive.

[0026] Furthermore, Velcro straps 17 can be attached to the horizontal and vertical flat strips, and these Velcro straps 17 can be attached to the back of the backrest cushion 2. Figure 4 The Velcro strap 27 helps to attach the backrest cushion smoothly to the backrest support.

[0027] Figure 4 The diagram shows a perspective view of the backrest cushion 2 of Example 1, including a support pad 21. Four Velcro straps 22 are fixed to the back of the support pad 21, which can be tied to the leather strap or flat strip of the backrest support. There is also a Velcro strap 27 behind it, which can be attached to the Velcro strap 17 on the leather strap 13 or flat strip to make the backrest cushion 2 flatter and more secure.

[0028] Figure 5is a perspective view of embodiment 2 of the present invention, as Figure 5 The backrest support 1 includes a Velcro loop tape 11a, vertical flat strips 12 connected to it by rivets 15, and elastic tapes 13a used as connecting tapes to connect two vertical flat strips 12. The Velcro loop tape is a Velcro tape with hooks, and the other is a Velcro tape with loops, which can be tied around the tube of the upper backrest 91.

[0029] As shown in Figure 6 The backrest cushion 2 includes a support surface cushion 21, and symmetrically fixed on the upper side of the support surface cushion 21 are snap tapes 22a, which include soft tapes 221a and snaps 222a. After the snaps 222a are snapped, the soft tapes 221a can be fixed on the elastic tapes 13a. The backrest cushion 2 also includes a Velcro tape 27 fixed on the back of the support surface cushion 21, which can be attached to the Velcro tape 17 at the corresponding position of the backrest support 1, so that the support surface cushion 21 is more level in the transverse direction. Two fixing pockets 23 are arranged below the back of the support surface cushion 21, and the vertical flat strips 12 can be inserted into the fixing pockets 23, so that the vertical flat strips 12 can be better fixed, and the support surface cushion 21 is more level.

[0030] Figure 7 is a perspective view of another backrest cushion of the present invention. The support surface cushion 21 of the backrest cushion 2 uses a flocked soft cushion, and the front of the support surface cushion 21 is provided with flocked threads 213a. In fact, the support surface cushion 21a itself is a laminated composite material, which includes a bottom layer 212a, a flocked lining 211a, and flocked threads 213a. A plurality of lacing tapes 22b are arranged on the back of the support surface cushion 21a, and two lacing tapes are tied together and can be tied to the connecting tapes or vertical flat strips or horizontal flat strips, so as to fix the entire backrest cushion 2 on the backrest support 1. Further, a plurality of snaps 27a are fixed on the back of the support surface cushion 21, which can be matched and connected with the snaps fixed on the connecting tapes or flat strips, so as to make the entire backrest cushion more level.

[0031] Preferably, the support surface cushion 21 of the backrest cushion 2 of embodiments 1 and 2 is generally also made of laminated materials, such as mesh cloth + sponge + mesh cloth, or rubber bottom + silk ring. Because different materials have different functions, such as support and cushioning. Different material combinations can be suitable for different seasons, such as flocked materials for winter and mesh materials for summer.

[0032] Obviously, the above described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work, such as the pipe connector can also be other forms, the connecting structure can also be other forms, such as a plurality of transverse strips can be added, such as: the style of the buckle and the belt buckle is many, such as the style of the supporting surface pad is also many, but this is not the core point of the present application, it will be very cumbersome to express, here is not shown, because this is easily thought by professionals.

[0033] The technical features of the above described embodiments can be combined arbitrarily. In order to make the description simple, the non-key connection mode is not described in detail, and all possible combinations of the technical features in the above described embodiments are not described. However, as long as the combination of the technical features does not exist, it should be considered as the scope of the present application.

[0034] In addition, any reference signs in the claims should not be construed as limiting the claims. The verb "comprise" and its variants do not exclude the presence of other elements or steps than those stated in the claims. The indefinite article "a" before an element or step does not exclude the presence of a plurality of such elements or steps.

[0035] It should be noted that the above described embodiments are only for description but not limitation of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of the present application. It can be understood that the present application can be modified and changed, as long as it does not deviate from the spirit and scope of the present application. The above modifications and changes are considered to be within the scope of the present application and the appended claims. The scope of protection of the present application is defined by the appended claims.

Claims

1. A movable backrest, comprising a backrest support frame and a backrest cushion movably connected thereto, characterized in that: The backrest support frame includes two symmetrically parallel tube connectors and vertical flat strips connected to the tube connectors, with a connecting strap connecting the two vertical flat strips; the backrest cushion includes a support pad and a connecting structure at the back, the connecting structure including Velcro, snaps, or ties; Velcro or snaps are connected to the vertical flat strips, connecting straps, or horizontal flat strips of the backrest support frame, which can be connected to the corresponding Velcro straps or snaps at the back of the backrest cushion.

2. The movable backrest according to claim 1, characterized in that: The connecting belt is an elastic belt or a leather belt, wherein the leather belt includes a soft belt and a buckle.

3. The movable backrest according to claim 1, characterized in that: The pipe connector is a pipe clamp or a Velcro strap.

4. The movable backrest according to claim 1, characterized in that: A horizontal strip connects the two vertical flat strips of the backrest support frame.

5. The movable backrest according to claim 4, characterized in that: The length of the horizontal flat strip is sufficient to support the chair back tube.

6. The movable backrest according to claim 1, characterized in that: The vertical and horizontal flat strips are made of carbon fiber, spring steel, or glass fiber.

7. The movable backrest according to claim 1, characterized in that: The backrest cushion has a fixed pocket attached to its back.

8. The movable backrest according to claim 1, characterized in that: The backrest cushion's support surface includes a mesh fabric and a flocked soft pad made by layering soft materials, or a composite pad made of mesh fabric plus sponge plus mesh fabric, or a rubber base plus silk loops.

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