JP3051833U - Chair backrest framework - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a frame structure of a chair back which is excellent in strength and safety in structure, and has a quick manufacturing process by simplifying the process. SOLUTION: A stool 6 is mainly composed of a main bone 1, upper and lower fixing parts 2, 3, a fixing bone 4, a fixing belt 5, and the like. A hollow inner tube is molded inside the rod of the main bone 1, a protruding stereotactic bone is provided inside the inner tube and the inside of the main bone 1, and the upper and lower fixing parts 2 and 3 have through holes to protrude therefrom. Piece 22,
32 are provided, and the two fixing rods 41 are crossed and fixed to the shaft. A fixing belt in which the main bone 1 is inserted into the upper and lower fixing parts 2 and 3, the upper and lower ends of some fixing rods 41 are fixed to the upper and lower fixing parts 2 and 3 respectively, and the tension can be adjusted at the rear end of the fixing rod 41. 5 is fixed. When opened, if the fixing belt 5 is tight, the fixed bone 4 cannot be folded,
Accidents of sudden closing can be prevented, and the reinforcement structural strength of the main bone 1 is also increased.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a framework for a chair back.

[0002]

[Prior art]

 At present, leisure chairs, which are generally used, can be easily carried after folding the chair.Therefore, many lightweight chairs are used for the frame of the chair, and they support aluminum tubes that are easy to mold. However, the “aluminum pipe” is a soft material and is not suitable for use in heavy places. In order for the aluminum tube to support the weight of the human body, the frame at the rear end of the chair body has a structure in which the tube body, including the reinforcing structure, exerts upward force to support it. The leisure chair generally seen has a design similar to that of FIG. 7, but as shown in FIGS. 8 and 9, mainly two main bones A penetrate in the vertical direction of the fixed body B, and A through hole B1 is provided, and the positioning plate B2 is projected. The support rod C is fixed at the intersection thereof at its upper and lower ends to the positioning plate B2. When the stool D is mounted on the assembled frame, a foldable chair is completed. In general, when sitting, most of the weight is concentrated on the rear end of the chair, so that a design as shown in FIG. It mainly has a screw hole A1 in the center of the main bone A, and a fixed hole B3 corresponding to the screw hole A1 on the back surface of the fixed body B. When the main bone A is inserted into the through hole B1, the bolt E is extended into the stereotactic hole B3, and the main bone A is firmly fixed to the fixed body B, there is an effect of reinforcing the thickness of the main bone A. FIG. 9 shows another main bone A structure. Mainly, several stereotactic bones A2 arranged at equal intervals are provided inside the main bone A, and the inner side surface of the stereotactic bone has internal threads A3. Has a further reinforcing effect.

[0003]

[Problems to be solved by the invention]

 However, this kind of leisure chair still has its drawbacks, and the main causes are as follows. For both types of main bones, after completing the reinforcement structure, it is necessary to provide a thread with an appropriate depth in the center and fix the bolt on the fixed body, and the manufacturing process is relatively complicated, Manufacturing speed is slow and inconvenient.

[0004] This type of skeleton does not have any structure that can be fixed when the chair is opened. Therefore, if the skeleton is inadvertently stepped on when the skeleton is slightly closed during movement, the skeleton is closed. It is very easy to fall down. The purpose of the present invention is to provide a framework for a chair back that increases safety by means of a fixed belt.

Another object of the present invention is to increase the structural strength of the chair back by forming a hollow inner tube in the radial cross section of the main bone and providing a fixed bone between the inner tube and the inner side of the main bone. To provide a framework for Still another object of the present invention is that when a main bone having a lock portion is inserted into a corresponding fixing part, the outer diameter of the main bone is reduced because the outer diameter is inserted into the insertion hole, and the diameter of the inner tube is reduced to the fixed body. It is an object of the present invention to provide a frame of a chair back in which a main bone is fixed to a fixed part by being expanded to be fitted.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the framework of the chair back according to claim 1 of the present invention is composed of at least a main bone, a fixed bone, a vertically fixed part, a stool and the like, wherein the main bone is a vertically fixed part. In the vertical direction, a few fixed rods intersect and are connected to each other to form a movable fixed bone.The upper and lower ends of each fixed rod are fixed with corresponding upper and lower fixed parts, and on the upper fixed part surface A stool is attached, and a fixed belt whose tension can be adjusted is fixed to the upper and lower ends of the fixed bone, which are symmetrical with each other, and when the fixed bone is opened, the fixed belt is taut. The condition is maintained to prevent accidents due to the chair being closed.

[0007] The frame of the chair back according to claim 2 of the present invention includes at least parts such as a main bone, a fixed bone, an upper and lower fixing part, and a stool. The fixed bone is fixed to the fixed parts, and the fixed bone is made up of a few fixed rods crossed and fixed on the shaft. The upper and lower ends of each fixed rod are fixed with corresponding upper and lower fixed parts, respectively. In the middle of the main bone, a hollow inner tube is made, and the inner tube and the inner side surface of the main bone are provided with a few stereotactic bones that are protruding and equidistantly arranged, and protrude from the lower lateral surface of the main bone. A lock part is provided slightly, an insertion hole with an appropriate depth is made in an appropriate place on the surface of the lower fixed part, and a stereotactic pillar protruding in a tapered shape is provided in the insertion hole. When inserted into the insertion hole of the lower fixture, the inner tube of the main bone is firmly supported by the stereotactic column, It is characterized by being properly fixed to a fixed part.

[0008]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, one embodiment of the present invention mainly includes a main bone 1, upper and lower fixing parts 2 and 3, a fixing bone 4, a fixing belt 5, and the like combined with a seat 6. Among them, the main bone 1 has a hollow inner tube 11 formed in the center in the radial direction and the cross-section. The inner bone 11 and the inner tube 11 have a few stereotactic bones 12 protruding from the inner side of the main bone 1 and arranged at equal intervals. A small number of lock portions 13 are provided in the vertical direction.

The upper and lower fixing parts 2 and 3 are provided with protrusions 21 and 31 at appropriate locations on the surface thereof, and insertion holes 211 and 311 are formed on the surfaces of the protrusions 21 and 31. The upper fixed component 2 is hollow, and a positioning column 312 projecting in a tapered shape is provided in a hole of the lower fixed component 3. Further, two fixing pieces 22 and 32 each having a through hole and having an angle of 90 degrees are formed on the outer side surfaces of the protruding portions 21 and 31.

[0010] The fixed bone 4 is formed by cross-connecting two fixing rods 41, and is a foldable skeleton. The fixed belt 5 is a belt body whose tension can be adjusted. Next, as shown in FIGS. 3 and 4, the two main bones 1 are penetrated in the longitudinal direction of the upper fixing component 2 and inserted into the insertion holes 311 of the lower fixing component 3. When the inner tube 11 of the main bone 1 is fitted into the stereotactic column 312 in the hole, the diameter of the inner tube 11 is slightly enlarged, and the inner tube 11 is firmly fixed to the stereotactic column 312. When the main bone 1 is fitted into the lower fixing component 3, the lock portion 13 is hooked on the inner side surface of the insertion hole 311, so that the main bone 1 is stably fixed to the lower fixing component 3. The main bone 1 is provided with a stereotactic bone 12, which enhances the strength of the rod. Further, the upper and lower ends of each fixing rod 41 of the fixing bone 4 are fixed to the fixing pieces 22 and 32 of the upper and lower fixing parts 2 and 3, respectively, whereby the framework is completed. Furthermore, when the fixing belt 5 whose tension can be adjusted is connected to the upper and lower ends symmetrical with respect to the rear end of the fixing rod 41, and the stool 6 is mounted on the upper fixing component 2, the leisure chair is completed.

When the present embodiment is carried out, as shown in FIGS. 4 and 5, the fixing rod 41 of the fixing bone 4 is symmetrically stretched and the fixing belt 5 is adjusted. A certain opening angle is maintained. When moving without folding, the fixing rod 41 is fixed to the fixing belt 5 and cannot be closed, so that a constant tension angle can be reliably maintained even after the movement. When folding, the fixing belt 5 is first loosened and the fixing bar 41 is closed symmetrically, so that after folding, the portable device can be carried using the fixing belt 5 and is very convenient.

In addition, as shown in FIG. 6, the lower fixed component 7 in another embodiment can be a fitting portion 71 and a fitting body 72. At an appropriate position on the surface of the fitting portion 71, a fitting hole 711 corresponding to the outer shape of the fitting body 72 is provided, an expansion hole 712 is opened at the upper end thereof, and a projected non-slip 721 is provided on the bottom side surface of the fitting body 72. Further, a tapered orienting column 722 is formed on an upper portion of the main bone 1 corresponding to the diameter of the inner tube 11. When the insertion body 72 is embedded in the insertion hole 711 of the corresponding fitting part 71, the orientation column 722 appropriately extends into the expansion hole 712, and when the main bone 1 is inserted into the expansion hole 712 corresponding to the insertion body 72, The orientation column 722 is embedded in the inner tube 11 and its diameter is deformed and expanded. Further, the main bone 1 of this embodiment can be applied to other cases, and is not limited to the framework of the leisure chair.

[0013]

[Effects of the Invention] The above-described invention has the following obvious effects. Its skeletal structure is reinforced compared to conventional products, and its strength is clearly increased. The assembling procedure is simple, it is only inserted into the lower fixation part corresponding to the main bone and localized, and assembling is quick because no complicated process is required.

[0014] Since the fixed bone is pulled by the fixing belt, it is impossible to close the two fixing rods, ensuring safety when sitting down, and closing during use. There is no occurrence. The fixation belt fixes the opening and closing of the fixation bone, and when folded, the fixation belt also acts as a backpack, making it easy to carry.

[Brief description of the drawings]

FIG. 1 is a schematic view of an embodiment of the present invention.

FIG. 2 is a partial exploded view of one embodiment of the present invention.

FIG. 3 is a schematic view of an embodiment of the present invention;

FIG. 4 is a rear view of the embodiment of the present invention.

FIG. 5 is a schematic view of the operation of the embodiment of the present invention.

FIG. 6 is a diagram related to another embodiment of the present invention.

FIG. 7 is a structural sketch of a conventional example.

FIG. 8 is a sketch drawing 1 of a main bone structure according to a conventional example.

FIG. 9 is a sketch drawing 2 of a main bone structure according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main bone 11 Inner tube 12 Stereotactic bone 13 Lock part 2 Upper fixed part 21 Projection part 211 Insertion hole 22 Fixed piece 3 Lower fixed part 31 Projection part 311 Insertion hole 312 Orientation pillar 32 Fixed piece 4 Fixed bone 41 Fixed rod 5 Fixed bar 5 Fixed belt Reference Signs List 6 stool part 7 lower fixing part 71 fitting part 711 fitting hole 712 expansion hole 72 fitting body 721 non-slip 722 positioning pillar A main bone A1 screw hole A2 positioning bone A3 internal thread B fixing body B1 through hole B2 positioning plate B3 positioning Hole C Support rod D Stool E Bolt

Claims (2)

[Utility model registration claims] 1. A main bone, a fixed bone, an upper and lower fixing part, and a stool, wherein the main bone is attached in a vertical direction of the upper and lower fixing parts, and when some fixing rods intersect and are axially connected, the main bone is movable. The fixed bone is fixed to the upper and lower ends of each fixed rod, and the corresponding upper and lower fixed parts are respectively fixed on the upper and lower ends, and the stool is attached on the upper fixed part surface, and two of the fixed bones are fixed. At the upper and lower ends that are symmetrical to the fixing bar, a fixing belt whose tension is adjustable is fixed, and when the fixing bone is opened, the fixing belt is maintained in a taut state, so that the chair is closed. A chair backrest that prevents accidents caused by accidents. 2. A main bone, a fixed bone, an upper and lower fixing component, and a stool portion, wherein the main bone extends through the upper fixing component and is fixed to the lower fixing component. Some fixed rods are crossed and fixed on the shaft, the upper and lower ends of each fixed rod are fixed with the corresponding upper and lower fixing parts, and a hollow inner part is provided in the middle of the main bone. The inner tube and the inner side surface of the main bone are provided with a few stereotactic bones protruding and arranged at equal intervals on the inner side surface of the inner tube and a slightly protruding lock portion on the outer side surface of the lower portion of the main bone. An insertion hole of an appropriate depth is formed at an appropriate location on the surface of the surface, and a stereotactic column protruding in a tapered shape is provided in the insertion hole, and the main bone is inserted into a corresponding insertion hole of the lower fixing component. And the inner tube is firmly supported by the stereotactic column, and is properly fixed to the lower fixing part. Framework of the chair backrest, characterized in that.