CN213820621U

CN213820621U - Office chair with foldable backrest and foldable cushion

Info

Publication number: CN213820621U
Application number: CN202022255237.8U
Authority: CN
Inventors: 钟自卫; 李建民; 张小东; 王国华; 陈杰
Original assignee: Anji Shengxin Office Furniture Co ltd
Current assignee: Anji Shengxin Office Furniture Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-07-30
Anticipated expiration: 2030-10-12

Abstract

The utility model provides an office chair with a foldable backrest and a foldable cushion, which comprises a chair frame, a backrest and a cushion, wherein the chair frame comprises two front chair legs and two rear chair legs, the upper ends of the front chair legs and the upper ends of the rear chair legs which are positioned at the same side are connected through a chair leg connecting rod, and the upper ends of the two rear chair legs extend upwards to form two backrest mounting parts; the backrest rotating rod can rotate around the rotating rod mounting part, and the backrest is fixedly mounted on the backrest rotating rod; the chair leg connecting rod inboard is provided with the rotatory installation department of second, a cushion rotary rod both ends respectively with two the rotatory installation department of second connect to can rotate around self axis, the cushion installation is fixed on the cushion rotary rod. The utility model discloses a setting of two rotary part for the back and the cushion of chair all can rotate foldingly, have made things convenient for accomodating of chair.

Description

Office chair with foldable backrest and foldable cushion

Technical Field

The utility model relates to an office chair with a foldable backrest and a foldable cushion, which belongs to the technical field of seats.

Technical Field

The chair backs and the seat cushions of office chairs which are commonly used in life are usually fixedly installed, and after the chair backs and the seat cushions are used, a large amount of space is occupied for storing the office chairs, and the space utilization rate is not high.

CN204670748U discloses a chair of collapsible back, the L type structure of the cushion of this chair and back formula as an organic whole, it relies on two parallel arrangement's L type skeleton to connect fixedly, and the position of buckling of L type skeleton is equipped with and is used for folding the folding assembly of back realizes the folding to the back of the chair through folding assembly, reaches and reduces occupation space, reduces the storage. The purpose of transportation costs; CN201821781613.3 discloses a folding chair that large-scale place used is convenient for accomodate, this folding chair all excavate the spacing groove at both ends about the cushion, and spacing inslot wall fixedly connected with reset spring folds so that accomodate the cushion through the spacing groove structure.

The space occupation problem of seat when accomodating has been solved to a certain extent to foretell scheme, but general usefulness is not enough, need adopt different modes of accomodating in the face of different occasions when accomodating, and the not good problem of effect of accomodating may appear when above-mentioned scheme is faced different demands.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a folding office chair of back and cushion can select to fold the back to reduce the height of chair, leave the chair in the place that the below has the cavity such as desk, also can fold the cushion, discharge the chair in proper order, realize accomodating in order.

In order to achieve the above purpose, the utility model discloses technical scheme as follows:

the utility model provides a folding office chair of back and cushion, includes chair frame, back and cushion, its characterized in that: the chair frame comprises two front chair legs and two rear chair legs, the distance between the two front chair legs is larger than the distance between the two rear chair legs, the upper ends of the front chair legs and the upper ends of the rear chair legs which are positioned on the same side are connected through chair leg connecting rods, and the upper ends of the two rear chair legs extend upwards to form two backrest mounting parts; the backrest rotating rod can rotate around the first rotating installation parts, and the backrest is fixedly installed on the backrest rotating rod; chair leg connecting rod inboard be provided with the rotatory installation department of second, a cushion rotary rod both ends respectively with two the rotatory installation department of second connect to can rotate around self axis, the cushion installation fix the cushion rotary rod on.

It should be noted that the terms "front" and "rear" as used above and hereinafter should be understood to mean that the side of the chair adjacent to the lower leg of a person is "front" and the side adjacent to the backrest is "rear" when the chair is used by the person; the "cushion width" described hereinafter refers to the distance between the left and right sides of the cushion. The length of the cushion refers to the distance between the front end and the rear end of the cushion.

Through the rotation of back rotary rod around first installation department, folding around the back can be realized, can fold the chair when folding forward and accomodate, reduce occupation space, can adjust the angle of back when folding backward, satisfy user's demand. Because the width of the front chair leg is larger than that of the rear chair leg, when the cushion of one chair is folded to be in a vertical upward state, an insertion area is formed between the cushion and the front chair leg, and the rear chair leg part of the other chair can be inserted into the insertion area, so that the plurality of chairs can be placed side by side, and the space occupation is reduced.

Furthermore, a disc-shaped first limiting part is arranged in the first rotary mounting part, a plurality of strip-shaped latch teeth are arranged on the first limiting part, and the latch teeth are obliquely arranged towards the direction of the first limiting part; a rotatable lantern ring is sleeved outside the first limiting piece, the backrest rotating rod is of a hollow tube structure, the lower end of the hollow tube is connected to the lantern ring, a spring pin is arranged at the lower end of the backrest rotating rod, one end of the spring pin extends out of the tube and is abutted against a latch on the limiting piece, the other end of the spring pin is located in the tube, and a spring pin limiting piece is arranged in the tube; an unlocking rack is also arranged in the backrest rotating rod, one end of the unlocking rack is connected with the spring pin, and the other end of the unlocking rack is provided with a self-locking spring; the upper end of the backrest rotating rod is also provided with an unlocking shaft, the unlocking shaft is provided with a gear and is meshed with an unlocking rack, and at least one end of each of two ends of the unlocking shaft is provided with a twisting cover.

The above-mentioned "the latch is obliquely arranged" means that an included angle is formed between the radial direction of the joint of the latch and the first limiting member and the arrangement direction of the latch, that is, the direction of the latch does not point to the center of the limiting member.

When the back rotary rod is rotated forward, the spring pin is jacked up along the inclined plane of the latch, when the spring pin enters a clamping groove between one clamping tooth and the next clamping tooth, the spring pin is ejected downward by the spring and clamped with the clamping groove, at the moment, if the back rotary rod rotates backward, the clamping tooth can support the spring pin to prevent the back rotary rod from rotating backward, locking is achieved, excessive rotation of the back is limited by the back limiting part on the lower half circumference, when the back rotates forward to the horizontal or backward to the horizontal, the back limiting part supports the spring pin, the back rotary rod cannot continue to rotate, and the locking effect is achieved. When needs unblock, rotate the unblock axle through turning round the lid, the unblock axle will make rack rebound to pull up the spring catch through the rack, the latch will be unable to restrict the spring catch this moment, the back rotary rod can rotate backward, the rack is pushed down by the auto-lock spring again after loosening and turning round the lid, the spring catch is locked by the latch once more, thereby realizes the multistage regulation of back.

Further, the section of the second rotary mounting part is circular, the upper half part of the second rotary mounting part is a cavity, the lower half part of the second rotary mounting part is provided with a second limiting part, and the second limiting part comprises a cushion horizontal limiting surface and a cushion vertical limiting surface; the two ends of the rotating rod of the cushion form a quarter cylinder structure respectively and are inserted into the cavity of the upper half part of the mounting part; the central axis of the second rotary installation part is provided with a roller, and two ends of the rotary rod of the cushion can rotate around the roller.

When the quarter cylinder structure at cushion rotary rod both ends is rotatory to the spacing face top of cushion level, the cushion is in the horizontality, when the cushion rotary rod is rotatory to the vertical spacing face of cushion on, the cushion is in vertical fold condition, and wherein the gyro wheel plays the effect that reduces friction, and is more light when making the cushion rotate.

Further, the horizontal limiting surface of the cushion of the second limiting part is parallel to the horizontal plane, and the vertical limiting surface of the cushion is obliquely arranged downwards and forms an included angle of 10-15 degrees with the horizontal plane.

Because vertical folding condition cushion down is probably because the focus reason is rotatory by oneself and is got back to the horizontality again, consequently sets the vertical spacing face of cushion to the tilt state, and the first half under the cushion vertical condition can inwards incline slightly under the effect of this structure, makes the focus lean on inwards, is difficult for outwards taking place the upset to lead to the cushion to get back to the horizontality.

Furthermore, the unlocking shafts at the upper ends of the rotating rods of the two backrests are connected through an unlocking connecting rod.

The unlocking connecting rod can connect the unlocking shafts of the backrests on the two sides, so that the unlocking shafts on the two sides can be synchronously unlocked, and the use convenience is improved.

Further, the second rotary mounting part and the cushion rotary rod are arranged at positions 60% -70% of the length of the cushion away from the front end of the cushion.

When the cushion rotary rod sets up too near the cushion front end, the insertional area undersize that the cushion formed after upwards folding, the effect that improves the rate of utilization of space is not good, when the cushion rotary rod sets up too near the cushion rear end, under someone used the condition of seat, the moment that the cushion rotary rod bore is great, cause the influence to life easily, and when people's buttock was sat the position by the back, can lead to the cushion unstability, in addition the cushion upwards folds back, the first half overlength, lead to the unstable condition in center more easily, consequently, select to set up the position apart from cushion front end 60% ~70% cushion length.

Further, the width of the cushion from the rear end of the cushion to the mounting position of the rotating rod of the cushion is smaller than the width between the corresponding chair leg connecting rods on the two sides.

In order for the seat cushion to fold up smoothly, the leg links cannot block the seat cushion in the path of rotation of the seat cushion, and therefore the width between the two leg links should be greater than the width of the seat cushion.

Furthermore, a first return spring connected with the lantern ring is arranged in the first rotary mounting part.

The direction of the reset elastic force of the reset spring is set to be the direction that the backrest rotates backwards, after the unlocking shaft unlocks the backrest rotating rod, the first reset spring enables the backrest to bounce backwards, and the backrest can be enabled to bounce by operating the torsion cover after being folded.

Furthermore, a second return spring connected with the rotating rod of the cushion is arranged in the second rotating installation part.

The direction of the reset elastic force of the reset spring is set to the direction of upward rotation of the cushion, so that the cushion can be further kept stable after being folded upwards.

To sum up, the utility model discloses there is following beneficial effect:

the seat can be stored in a space with smaller height such as a table bottom and the like by folding the backrest, and a plurality of chairs can be stored side by folding the cushion, so that the chairs are orderly placed and the space utilization rate is improved; the backrest can be folded forwards and backwards, the angle of the backrest can be adjusted, the requirements of users are met, the folding back plate can be restored only by twisting the cover and rotating the unlocking shaft during unlocking, and the operation is simple.

Drawings

FIG. 1 is a schematic view of a chair frame;

fig. 2 is a rear view of the present invention;

FIG. 3 is a schematic structural view of a backrest rotating rod and a first rotating installation part;

fig. 4 is a bottom view of the present invention;

FIG. 5 is a schematic view of a second rotary mounting part;

fig. 6 is a schematic view of the utility model after the backrest is folded;

fig. 7 is a schematic view of the folded seat cushion of the present invention;

the chair comprises a chair frame 1, a chair back 2, a chair cushion 3, a chair leg 11, a front chair leg 12, a rear chair leg 13, a chair leg connecting rod 14, a chair back mounting part 21, a chair back rotating rod 131, a second rotating mounting part 141, a first rotating mounting part 211, a spring pin 212, a spring pin limiting part 212, an unlocking rack 213, a self-locking spring 214, an unlocking shaft 215, an unlocking connecting rod 216, an unlocking connecting rod 1311, a second limiting part, a roller 1312, a ring 1411 and a first limiting part 1412.

Detailed Description

Examples

As shown in figures 1-7, an office chair with foldable backrest and a foldable cushion comprises a chair frame 1, a backrest 2 and a cushion 3, and is characterized in that: the chair frame comprises two front chair legs 11 and two rear chair legs 12, the distance between the two front chair legs 11 is larger than the distance between the two rear chair legs 12, the upper ends of the front chair legs 11 and the upper ends of the rear chair legs 12 which are positioned on the same side are connected through chair leg connecting rods 13, and the upper ends of the two rear chair legs 12 extend upwards to form two backrest mounting parts 14; the inner side of the backrest mounting part 14 is provided with a first rotary mounting part 141, the lower ends of the two backrest rotating rods 21 are respectively connected with the two first rotary mounting parts 141, the backrest rotating rods 21 can rotate around the rotating rod mounting parts 141, and the backrest 2 is fixedly mounted on the backrest rotating rods 21; chair leg connecting rod 13 inboard be provided with second rotatory installation department 131, a cushion rotary rod 31 runs through the cushion, the both ends of cushion rotary rod respectively with two the rotatory installation department 131 of second connect to can rotate around self axis, the cushion installation fix the cushion rotary rod on.

A disc-shaped first limiting part 1412 is arranged in the first rotary mounting part 141, a plurality of strip-shaped latch teeth are arranged on the first limiting part, and the latch teeth are obliquely arranged; a rotatable lantern ring 1411 is sleeved outside the first limiting piece 1412, the backrest rotating rod 21 is of a hollow tube structure, the lower end of the hollow tube is connected to the lantern ring 1411, a spring pin 211 is arranged at the lower end of the backrest rotating rod 21, one end of the spring pin 211 extends out of the tube and is abutted against a latch on the limiting piece 1412, the other end of the spring pin 211 is located in the tube, and a spring pin limiting piece 212 is arranged in the tube; an unlocking rack 213 is also arranged in the backrest rotating rod, one end of the unlocking rack 213 is connected with a spring pin, and the other end of the unlocking rack 213 is provided with a self-locking spring 214; the upper end of the backrest rotating rod 21 is further provided with an unlocking shaft 215, the unlocking shaft is provided with a gear and is meshed with the unlocking rack 212, and at least one end of the two ends of the unlocking shaft is provided with a twist cover.

The section of the second rotary mounting part 131 is circular, the upper half part of the second rotary mounting part is a cavity, the lower half part of the second rotary mounting part is provided with a second limiting piece 1311, the second limiting piece comprises a cushion horizontal limiting surface and a cushion vertical limiting surface, the cushion horizontal limiting surface is parallel to the horizontal plane, and the cushion vertical limiting surface is obliquely arranged downwards and forms an included angle of 15 degrees with the horizontal plane; the two ends of the rotating rod 31 of the cushion form a quarter cylinder structure respectively and are inserted into the cavity of the upper half part of the second mounting part; a roller 1312 is arranged on the central axis of the second mounting part, and two ends of the rotating rod of the cushion can rotate around the roller 1312; a second return spring connected with the cushion rotating rod 31 is arranged in the second rotating installation part 131; the cushion rotating rod and the second mounting part are arranged at the position which is 70% of the length of the cushion away from the front end of the cushion; the width of the cushion from the rear end of the cushion 3 to the mounting position of the cushion rotating rod 31 is less than the width between the corresponding leg links 13 at the two sides.

When the back plate is folded, the back plate is pressed forwards, and the back plate is automatically locked under the action of the self-locking spring and the spring pin to keep a folded state; when the backboard is restored, the unlocking shaft is twisted, the unlocking shaft drives the unlocking rack to move upwards, the unlocking rack drives the spring pin to move upwards, the spring pin is separated from the constraint of the latch, the backrest rotating rod bounces upwards under the action of the first reset spring to restore to a vertical state, and meanwhile, the angle of the backrest can be adjusted through the unlocking shaft.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a folding office chair of back and cushion, includes chair frame (1), back (2) and cushion (3), its characterized in that: the chair frame comprises two front chair legs (11) and two rear chair legs (12), the upper ends of the front chair legs (11) and the upper ends of the rear chair legs (12) which are positioned on the same side are connected through chair leg connecting rods (13), and the upper ends of the two rear chair legs (12) extend upwards to form two backrest mounting parts (14); the backrest comprises a backrest mounting part (14), a first rotary mounting part (141) is arranged on the inner side of the backrest mounting part (14), the lower ends of two backrest rotating rods (21) are respectively connected with the two first rotary mounting parts (141), the backrest rotating rods (21) can rotate around the first rotary mounting parts (141), and a backrest (2) is fixedly mounted on the backrest rotating rods (21); chair leg connecting rod (13) inboard be provided with second rotatory installation department (131), a cushion rotary rod (31) both ends respectively with two second rotatory installation department (131) connect to can rotate around self axis, the cushion installation fix the cushion rotary rod on.

2. An office chair with a foldable backrest and a foldable seat cushion as claimed in claim 1, wherein: a disc-shaped first limiting piece (1412) is arranged in the first rotary mounting part (141), a plurality of strip-shaped latch teeth are arranged on the first limiting piece, and the latch teeth are obliquely arranged; a rotatable lantern ring (1411) is sleeved outside the first limiting piece (1412), the backrest rotating rod (21) is of a hollow tube structure, the lower end of the hollow tube is connected to the lantern ring (1411), a spring pin (211) is arranged at the lower end of the backrest rotating rod (21), one end of the spring pin (211) extends out of the tube and is abutted against a latch on the limiting piece (1412), the other end of the spring pin is located in the tube, and a spring pin limiting piece (212) is arranged in the tube; an unlocking rack (213) is also arranged in the backrest rotating rod, one end of the unlocking rack (213) is connected with the spring pin, and the other end of the unlocking rack is provided with a self-locking spring (214); the upper end of the backrest rotating rod (21) is also provided with an unlocking shaft (215), the unlocking shaft is provided with a gear and is meshed with an unlocking rack (213), and at least one end of the two ends of the unlocking shaft is provided with a twist cover.

3. An office chair with a foldable backrest and a foldable seat cushion as claimed in claim 1, wherein: the section of the second rotary mounting part (131) is circular, the upper half part of the second rotary mounting part is a cavity, the lower half part of the second rotary mounting part is provided with a second limiting part (1311), and the second limiting part comprises a cushion horizontal limiting surface and a cushion vertical limiting surface; two ends of the cushion rotating rod (31) form a quarter-cylinder structure respectively and are inserted into the cavity of the upper half part of the mounting part; the central axis of the second rotary installation part is provided with a roller (1312), and two ends of the rotary rod of the cushion can rotate around the roller.

4. An office chair with a foldable backrest and a foldable seat cushion as claimed in claim 3, wherein: the horizontal limiting surface of the cushion of the second limiting piece (1311) is parallel to the horizontal plane, and the vertical limiting surface of the cushion is obliquely arranged downwards and forms an included angle of 10-15 degrees with the horizontal plane.

5. An office chair with a foldable backrest and a foldable seat cushion as claimed in claim 2, wherein: the unlocking shafts (215) at the upper ends of the two backrest rotating rods (21) are connected through an unlocking connecting rod (216).

6. An office chair with a foldable backrest and a foldable seat cushion as claimed in claim 1, wherein: the second rotary mounting part (131) and the cushion rotary rod (31) are arranged at the position which is 60-70% of the length of the cushion away from the front end of the cushion.

7. An office chair with a foldable backrest and a foldable seat cushion as claimed in claim 6, wherein: the interval between two preceding chair legs (11) be greater than two back chair leg (12) between the interval, the cushion width of rear end to cushion rotary rod (31) installation department of cushion (3) be less than the width between the two corresponding chair leg connecting rods (13) of both sides.

8. An office chair with a foldable backrest and a foldable seat cushion as claimed in claim 2, wherein: the first rotating installation part (141) is internally provided with a first return spring connected with the lantern ring (1411).

9. An office chair with a foldable backrest and a foldable seat cushion as claimed in claim 3, wherein: and a second return spring connected with the cushion rotating rod (31) is arranged in the second rotating installation part (131).