WO2020156263A1

WO2020156263A1 - Novel pentagram-like leg having folding function

Info

Publication number: WO2020156263A1
Application number: PCT/CN2020/072922
Authority: WO
Inventors: 俞金谦
Original assignee: 安吉金泰紧固件有限公司
Priority date: 2019-02-02
Filing date: 2020-01-19
Publication date: 2020-08-06
Also published as: CN109619890A

Abstract

Disclosed is a novel pentagram-like leg having a folding function. A central body (1) is provided with a first insertion slot (101), a second insertion slot (102) and an in-slot protruding friction part (103). A branch leg (2) is provided with a first insertion block (201), a second insertion block (202) and a block protruding friction part (203). The present invention has the advantages that a pentagram-like leg folding structure is rational and effective, is unlikely to fall off and separate when folded, and provides great support strength when unfolded for use, and the splitting foldable pentagram-like leg has a good overall use effect, and is flexible and convenient.

Description

A new type of five-star foot with folding function

Technical field

The invention belongs to the technical field of support structures, and particularly relates to a novel five-star foot with a folding function.

Background technique

Swivel chair feet, also known as five-star feet, are commonly used support accessories for swivel chairs and office chairs. They are used to install lifting cylinders and support the swivel chair. The existing swivel chair legs are usually of integral structure. On the one hand, when one of the leg arms is damaged, It is necessary to replace the entire five-star base, which causes unnecessary waste. On the other hand, its integral structure takes up a lot of space, especially when storing or packing and transporting, it wastes a lot of space and high transportation costs, which increases the company's expenditure. .

technical problem

Although the existing folding five-star feet are easy to be folded and folded, they all reduce the structural strength of the five-star feet to varying degrees. In addition, in the existing products, the feet of the five-star feet after being folded and folded are prone to fall off and separate from the central body. The next installation adds unnecessary repeated assembly operations. In addition, the existing five-star feet are prone to accidental opening after being folded and affecting use.

The patent publication number is CN206197512U, and the Chinese utility model patent with the publication date of 2017.05.31 discloses a five-star foot of a swivel chair that can be combined and folded. Its structure includes: foot bar, center piece, fixed piece, chain angle, lock key, and bump , Fixed block, positioning block, groove, the side of the foot bar is provided with a center piece, the foot bar is movably connected with the center piece through a chain angle, and the center piece side is provided with a foot bar, and the center piece passes through the chain angle Movably connected with the foot bar, the center piece is provided with a foot bar, the center piece is movably connected with the foot bar through a chain angle, the side of the center piece is provided with a foot bar, the center piece is movable with the foot bar through the chain angle The central part is provided with a fixed part under the central part, and the central part is movably connected with the fixed part through a hinge, the central part is provided with a lock key, and the central part is fixedly connected with the lock key.

However, the five-star leg of the swivel chair in the utility model patent has the problem of low support strength when unfolded.

Technical solutions

The purpose of the present invention is to provide a new type of five-star foot with folding function, which can be provided by arranging a first insertion groove, a second insertion groove and a friction part protruding in the groove on the central body; The way the block, the second insert block and the block protrude the friction part achieves the effect of effectively folding the five-star foot. The invention has the advantages of reasonable and effective folding structure of the five-star foot, not easy to fall off and separate when folded and closed, high supporting strength when unfolded, and good overall use effect, flexibility and convenience of the split folding five-star foot.

The technical solution adopted by the present invention to solve the above-mentioned problems is: a new type of five-star foot with folding function, including a central body and five supporting legs. The central body is provided with a first insert block and a second The first insertion groove and the second insertion groove of the insertion block are respectively inserted and installed and rotated and folded, and the first insertion groove and the second insertion groove are both provided with the first insertion block and the second insertion groove. A friction part protrudes in the groove for deformation clamping on the side surface of the insert block, and the first insert block and the second insert block are both provided with the inner surface of the first insert groove and the second insert groove. The deformed and clamped block protrudes from the friction part.

A further preferred technical solution is that: the first insertion block and the second insertion block are each provided with a pair of outer arc grooves and inner arc grooves for insertion, installation and rotation folding; the first insertion groove And the second insertion groove is provided with a side connecting block and a middle connecting block which are respectively used for arc surface engagement with the outer arc groove and the inner arc groove to be rotated and folded.

A further preferred technical solution is that the protruding friction parts in the groove are provided on the groove body surfaces on both inner sides of the first insertion groove and the second insertion groove and are used on the groove body sides of the outer arc-shaped groove. The block protruding friction part is arranged on the groove body of the outer arc-shaped groove and is used to perform on the groove body surfaces on both inner sides of the first insertion groove and the second insertion groove Deformation clamping.

A further preferred technical solution is that: the outer arc-shaped groove and the inner arc-shaped groove both include a groove body edge protrudingly provided on the first insertion block and the second insertion block and an arc-shaped slot, the outer The arc-shaped slot opening position of the arc-shaped slot is provided with an inclined protrusion for blocking and limiting the side connecting block after being inserted and inserted.

A further preferred technical solution is that the thickness of the inclined convex portion increases along the locking direction of the side connecting block.

A further preferred technical solution is that the protruding friction part in the groove is arranged at a position above the inner side of the side connecting block, and the block protruding friction part is arranged on the side of the groove body of the outer arc-shaped groove Near the opening position, the thickness and cross-sectional area of the protruding friction part in the groove are larger than those of the block protruding friction part, and one side of the protruding friction part in the groove is arranged on the side connecting block .

A further preferred technical solution is that the central body further includes a pressure-bearing groove body arranged at the upper ends of the first and second insertion grooves and bent downward to form grooves for supporting on the mounting end surfaces of the feet.

A further preferred technical solution is that: the pressure-bearing groove body is provided with downwardly protruding and located in the first insertion groove and the second insertion groove, and is used to connect the first insertion block and the second insertion block in an annular shape. Vertical bearing block for support on the side.

A further preferred technical solution is that: the annular side surfaces of the first insert block and the second insert block are provided with block thickening plates for supporting the vertical pressure bearing block.

A further preferred technical solution is that: structural slots are provided on the side of the outer arc-shaped slot and the mounting end surface of the support foot.

Beneficial effect

In the present invention, a first insertion groove, a second insertion groove and a friction part protruding in the groove are provided on the central body; the first insertion block, the second insertion block and the friction part protruding from the block are provided on the supporting leg, The five-star foot can be effectively folded and used. The invention has the advantages of reasonable and effective folding structure of the five-star foot, not easy to fall off and separate when folded and closed, high supporting strength when unfolded, and good overall use effect, flexibility and convenience of the split folding five-star foot.

Description of the drawings

Fig. 1 is a schematic diagram of the structure of the five-star foot in the present invention when it is deployed.

Figure 2 is a schematic diagram of the structure of the central body in the present invention.

Fig. 3 is a schematic diagram of the position structure of the vertical pressure bearing block in the present invention.

Figure 4 is a schematic diagram of the structure of the mounting end of the foot in the present invention.

Fig. 5 is a schematic diagram of the position structure of the inner arc groove in the present invention.

Fig. 6 is a schematic diagram of the structure of the five-star foot when folded in the present invention.

The best mode of the invention

The following descriptions are only preferred embodiments of the present invention, and do not limit the scope of the present invention.

Embodiment: As shown in Figures 1, 2, 3, 4, 5 and Figure 6, a new type of five-star foot with folding function includes a central body 1 and five supporting legs 2, and the central body 1 is provided with The first insertion block 201 and the second insertion block 202 on the support leg 2 are respectively inserted into the first insertion slot 101 and the second insertion slot 102 for rotating and folding, the first insertion slot 101 and The second insertion groove 102 is provided with a friction portion 103 protruding in the groove for deforming and clamping on the sides of the first insertion block 201 and the second insertion block 202, and the first insertion block 201 and the second insertion block 202 Each of the inserting blocks 202 is provided with a block protruding friction portion 203 for deforming and clamping the inner surfaces of the first inserting groove 101 and the second inserting groove 102.

In this embodiment, there are 5 pairs of the first insertion groove 101 and the second insertion groove 102 on the central body 1 to correspond to the five legs 2, the first insertion groove 101 and The second insertion slot 102 is formed by two side plates and a middle plate, and is used for inserting and installing the first insertion block 201 and the second insertion block 202 to ensure basic disassembly, assembly, and folding opening and closing functions.

On the other hand, the protruding friction part 103 in the groove is provided on the inner surface of the side plate, and is used for deforming and clamping on the outer surface of the first insertion block 201 and the second insertion block 202, so as to avoid the five-star If the foot accidentally falls off and separates, the block protruding friction portion 203 is provided on the outer surface of the first insertion block 201 and the second insertion block 202 for deformation and clamping on the inner surface of the side plate, and finally ensures the A total of five connecting plates between the central body 1 and the feet 2 have a relatively large and appropriate friction strength to prevent the feet 2 from falling off the central body 1 when being folded, and ensure a basic stable folding effect.

Moreover, the foldable five-star feet are essentially detachable, and the clamping structure is only used to avoid accidental fall-off and separation of the five-star feet when folded, and when one of the feet 2 is damaged and needs to be replaced, the clamping structure After the structure is forced and lifted, the new one can be directly reinstalled and used.

The first insertion block 201 and the second insertion block 202 are each provided with a pair of outer arc-shaped grooves 204 and inner arc-shaped grooves 205 for insertion, installation and rotation folding; the first insertion groove 101 and the second insertion groove 101 Each of the two insertion slots 102 is provided with a side connecting block 104 and a middle connecting block 105 which are respectively used for arc surface engagement with the outer arc-shaped groove 204 and the inner arc-shaped groove 205 to be rotated and folded.

In this embodiment, the side connecting block 104 and the middle connecting block 105 are convex cylindrical blocks, which cooperate with the arc surfaces on the outer arc groove 204 and the inner arc groove 205 to ensure the first After the first insertion block 201 and the second insertion block 202 are engaged on the side connecting block 104 and the middle connecting block 105, they have an effective rotation and folding function, wherein the side connecting block 104 and the middle connecting block The block 105, the outer arc-shaped slot 204 and the inner arc-shaped slot 205 are all arranged in pairs, and finally ensure that the first insertion block 201 and the second insertion block 202 have four sides: first, the arc-shaped surface is engaged The back can be rotated and folded to ensure the effectiveness of the folding of the five-star foot. Second, the slotted and protruding block are locked and fixed in position to ensure the stability of the unfolding support of the five-star foot.

The protruding friction portion 103 in the groove is provided on the groove body surfaces on both inner sides of the first insertion groove 101 and the second insertion groove 102 and is used to deform on the groove body side of the outer arc-shaped groove 204 Clamping; the block protruding friction portion 203 is provided on the groove body of the outer arc-shaped groove 204 and is used on the inner side groove surfaces of the first insertion groove 101 and the second insertion groove 102 Perform deformation clamping.

In this embodiment, the protruding friction portion 103 in the groove is a rectangular block provided at a position above the inner side of the side connecting block 104, and is used to extend the arc groove 204 away from the block on the outer side. The protruding friction part 203 slides and deforms and clamps on one side, and the block protruding friction part 203 is located at the lower end of the outer arc-shaped groove 204, and the shape is smaller than the protruding friction part in the groove The protruding ball head of 103 or the smaller rectangular block is used for sliding deformation and clamping on the outer and lower side of the side connecting block 104. The two final effects are the same, and both are used to improve the The friction strength of the first inserting block 201 and the second inserting block 202 on the first inserting groove 101 and the second inserting groove 102 ensures that the five feet 2 are not easy to fall off after being rotated, folded, and folded. It is not easy to be disassembled accidentally during transportation. For this purpose, the inner thickness of the connection between the first insertion groove 101 and the second insertion groove 102 and the central body 1 is slightly larger than the outer thickness, showing a retracted form, which is also improved The friction strength of the first insertion block 201 and the second insertion block 202 after installation prevents the feet 2 from accidentally falling off when being folded, so that even if one of the feet is held by hand, the weight of the other 4 feet and the central body is pressed on There will be no accidental separation on the connection part, and the friction strength of the insertion and installation is sufficient and suitable.

The outer arc-shaped groove 204 and the inner arc-shaped groove 205 each include a groove side protrudingly provided on the first insertion block 201 and the second insertion block 202 and an arc-shaped slot. The outer arc-shaped slot The arc-shaped slot opening position of 204 is provided with an inclined protrusion 207 for blocking and limiting the side connecting block 104 after being inserted. The thickness of the inclined protruding portion 207 increases along the locking direction of the side connecting block 104.

In this embodiment, the insertion and engagement structure of one central body 1 plus five five supporting legs 2 is connected, installed and folded when leaving the factory, and the outer arc-shaped groove 204 and the inner arc-shaped groove The opening design of 205 ensures that the side connecting block 104 and the middle connecting block 105 can be inserted and installed when leaving the factory, and the presence of the inclined protrusion 207 is used to increase the accidental sliding of the side connecting block 104 The inclined protrusion 207 is thick on the inside and thin on the outside, and is arranged in the shape of a sliding table at the opening of the outer arc-shaped groove 204, so that the foot 2 has the following two advantages:

First, after the outer arc-shaped groove 204 and the side connecting block 104 are inserted and engaged, the leg 2 is not easy to release the engagement and fall off;

Second, when a certain leg 2 is accidentally damaged, a large force can be applied to make the side connecting block 104 cross the thick inner side of the inclined protrusion 207 to complete a single leg The removal, replacement and installation operation of 2 ensures the flexibility of use of the five-star foot.

On the other hand, when the foot 2 is installed, the opening of the outer arc-shaped groove 204 faces downward, that is, the long axis of the foot 2 is approximately vertically downward, and the thick inner side of the inclined protrusion 207 After being overridden by the side connecting block 104, the installation is completed, and finally the supporting leg 2 is rotated upward to expand, and the seat can be supported for normal use.

In addition, the inclined protrusion 207 may fill the entire opening position of the outer arc-shaped groove 204, or may independently protrude an inclined wedge-like inner surface on the plane of the opening of the outer arc-shaped groove 204. A thick and thin block body prevents the side connecting block 104 from moving out after being stuck in.

The protruding friction portion 103 in the groove is disposed at a position above the inner side of the side connecting block 104, and the block protruding friction portion 203 is disposed on the side of the outer arc-shaped groove 204 near the opening position Where, the thickness and cross-sectional area of the protruding friction portion 103 in the groove are greater than those of the block protruding friction portion 203, and one side of the protruding friction portion 103 in the groove is set on the side connecting block 104 on.

In this embodiment, the protruding friction portion 103 in the groove and the protruding friction portion 203 of the block are located on the same set of contact surfaces, the former is located above the inner side of the contact surface, and the latter is located below the outer side, forming a deformation that simultaneously acts on the inside and outside. The clamping effect ensures the anti-falling effect of the feet 2 after installation, and the appropriate degree of rotation and folding resistance. If the convex friction part 103 in the groove and the block convex friction part 203 overlap, then Because the thickness is too large and the rotation resistance is too large, it cannot be rotated and folded properly, so the above-mentioned one-in-one-out split structure is adopted.

On the other hand, the first insertion block 201 and the second insertion block 202 are thicker on the side of the protruding friction part 103 in the groove, that is, the front end of the protruding friction part 203 is thicker. The side, that is, the insertion rear end is thin, and the three plates forming the first insertion groove 101 and the second insertion groove 102 are also thick on the inside and thin on the outside, so the large rectangular groove The thickness and area of the inner protruding friction portion 103 are larger than those of the block protruding friction portion 203, which ensures that the friction provided during deformation and clamping matches the insertion clamping strength, that is, the clamping force on both sides of the insertion inner end is strong, The deformation friction clamping force is also strong, and the outer end has a small clamping force on both sides, and the deformation friction clamping force is also small. This is reflected in the small and thin protruding friction part 103 in the groove. on.

In addition, the rectangular structure of the friction portion 103 protruding in the groove is connected to the side connecting block 104, that is, an integral molding method is adopted during molding. Therefore, the lower end of the rectangular structure has a Notch, which is also conducive to the one-step flow molding of liquid resin or metal during molding. The two molding notches at the protruding friction portion 103 and the side connecting block 104 penetrate through the groove to achieve contact connection, which is more The protruding friction portion 103 in the groove and the side connecting block 104 are arranged separately and formed independently. The connection contact method in this embodiment has the advantage of high connection strength.

The central body 1 further includes a pressure-bearing groove body 106 arranged at the upper ends of the first insertion groove 101 and the second insertion groove 102 and bent downward to form a groove for supporting on the foot mounting end surface 206. The pressure-bearing groove body 106 is provided with downwardly protruding and located in the first inserting groove 101 and the second inserting groove 102 and is used for the annular side surfaces of the first inserting block 201 and the second inserting block 202 The vertical pressure-bearing block 108 supported on the upper surface. The annular side surfaces of the first insertion block 201 and the second insertion block 202 are provided with a block thickening plate 208 for supporting the vertical pressure bearing block 108.

In this embodiment, the support foot 2 is mainly used for pressure-bearing support operations after unfolding, and its pressure-bearing is relatively large, which is the main structural strength index of the five-star foot. The outer arc groove 204 and the inner arc groove 205 and the side The side connecting block 104 and the middle connecting block 105 correspond to the "hooking", which has a tendency to pull outwards. The foot mounting end surface 206 abuts on the pressure-bearing groove body 106, with an inward push The trend is to finally ensure the installation stability of the feet 2 on the central body 1, and the block thickening plate 208 abuts on the vertical pressure-bearing block 108 to supplement the support of the foot mounting end surface 206 Strength, and finally ensure that the five-star foot connection part has a force mode of "lower pull and upper press" to ensure sufficient support strength to support the weight of the seat and the person.

A structural slot 209 is provided on the side of the outer arc-shaped slot 204 and the foot mounting end surface 206.

In this embodiment, the structural slot 209 is used to avoid the molding collapse problem caused by the large thickness during the plastic integral molding process, and can ensure a lighter weight under the precursor that does not substantially affect the support strength , In order to improve the overall experience of the five-star foot, the structural slot design is arranged on the center body 1 and other places on the feet 2, and the opening of the structural slot 209 is set so that the first The elasticity of the insertion block 201 and the second insertion block 202 is increased, which further increases the deformation and clamping amplitude of the protruding friction portion 203 of the block.

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those of ordinary skill in the technical field, it can also be done without departing from the purpose of the present invention Make various modifications. These are all non-creative modifications, as long as they are protected by the patent law within the scope of the claims of the present invention.

Claims

A new type of five-star foot with folding function, comprising a central body (1) and five supporting feet (2), characterized in that: the central body (1) is provided with a first for contacting the supporting feet (2) The first insertion slot (101) and the second insertion slot (102) where the insertion block (201) and the second insertion block (202) are inserted, installed and rotated and folded respectively, the first insertion slot (101) and The second insertion groove (102) is provided with a friction part (103) in the groove for deforming and clamping on the sides of the first insertion block (201) and the second insertion block (202). Both the first insertion block (201) and the second insertion block (202) are provided with blocks for deforming and clamping the inner surfaces of the first insertion groove (101) and the second insertion groove (102) The friction part (203) protrudes.
A new type of five-star foot with folding function according to claim 1, characterized in that: the first insert block (201) and the second insert block (202) are both provided with a pair of inserting and installing and The outer arc-shaped groove (204) and the inner arc-shaped groove (205) that are rotatably folded; the first insertion groove (101) and the second insertion groove (102) are respectively provided with the outer arc The side connecting block (104) and the middle connecting block (105) to be rotated and folded after the arc-shaped groove (204) and the inner arc-shaped groove (205) are engaged with the arc surface.
The new five-star pin with folding function according to claim 2, characterized in that: the protruding friction part (103) in the groove is arranged in the first insertion groove (101) and the second insertion groove (102) on both sides of the inner groove surface and used to deform and clamp on the groove side surface of the outer arc-shaped groove (204); the block protruding friction part (203) is arranged on the outer arc-shaped The groove body of the groove (204) is used to deform and clamp the groove body surfaces on both inner sides of the first insertion groove (101) and the second insertion groove (102).
The new five-star foot with folding function according to claim 2, characterized in that: the outer arc-shaped groove (204) and the inner arc-shaped groove (205) both include protrusions arranged on the first insertion block (201) and the side of the groove on the second insertion block (202) and the arc-shaped slot, and the arc-shaped slot opening position of the outer arc-shaped slot (204) is provided with a card for inserting The side connecting block (104) blocks the inclined protrusions (207) for limiting the position.
The new five-star foot with folding function according to claim 4, characterized in that: the thickness of the inclined protrusion (207) increases along the locking direction of the side connecting block (104).
A new type of five-star foot with folding function according to claim 4, characterized in that: the protruding friction part (103) in the groove is arranged at a position above the inner side of the side connecting block (104), so The protruding friction portion (203) of the block is arranged on the side of the outer arc-shaped groove (204) near the opening position, and the thickness and cross-sectional area of the protruding friction portion (103) in the groove are larger than the The block body protrudes with a friction portion (203), and one side of the groove protruding from the friction portion (103) is arranged on the side connecting block (104).
A new type of five-star pin with folding function according to claim 4, characterized in that: the central body (1) further comprises the first socket (101) and the second socket (102). ) The upper end is bent downward to form a groove for supporting the pressure-bearing groove body (106) on the foot mounting end surface (206).
The new five-star foot with folding function according to claim 7, characterized in that: the pressure-bearing groove body (106) is provided with downwardly protruding and located in the first insertion groove (101) and A vertical pressure-bearing block (108) in the second plug-in slot (102) and used for supporting on the annular side surface of the first plug-in block (201) and the second plug-in block (202).
A new type of five-star foot with folding function according to claim 8, characterized in that: the first insertion block (201) and the second insertion block (202) are provided on the annular side surface for contact with the vertical bearing The block thickened plate (208) supported by the pressing block (108).
The new type five-star foot with folding function according to claim 8, characterized in that: the groove body side of the outer arc-shaped groove (204) and the foot mounting end surface (206) are provided with structural slots (209) .