CN217524351U

CN217524351U - Folding chair frame

Info

Publication number: CN217524351U
Application number: CN202221173751.XU
Authority: CN
Inventors: 贾情深
Original assignee: Yongkang Hantong Trading Co ltd
Current assignee: Yongkang Hantong Trading Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-10-04
Anticipated expiration: 2032-05-17

Abstract

The utility model discloses a folding chair frame, folding chair frame includes left chair frame, the right chair frame that bilateral symmetry set up, left side chair frame, right chair frame all include back of the body pole unit, still include: the outer ends of the lifting mechanism are hinged to a left upper pull rod, a right upper pull rod, a left lower pull rod and a right lower pull rod on the back rod unit; the lifting mechanism comprises an upper connecting seat and a lower connecting seat which are arranged at intervals, and the upper connecting seat and the lower connecting seat are connected through a cross mechanism; the inner end of the left upper pull rod is hinged on the right side of the upper connecting seat, and the inner end of the right upper pull rod is hinged on the left side of the upper connecting seat; the inner ends of the left lower pull rod and the right lower pull rod are hinged on the lower connecting seat; when the folding state is carried out, the left upper pull rod and the right upper pull rod are crossed.

Description

Folding chair frame

Technical Field

The utility model belongs to the technical field of folding chair technique and specifically relates to a folding chair frame is related to.

Background

In the conventional foldable chair frame, as disclosed in chinese patent No. CN104856487B, a pull rod extending up and down is used to drive two movable pivot seats upward, so as to drive the inner ends of four separate connecting rods upward, and finally, two back rods are gradually closed to form a folding structure. However, as such a structure, there are also the following drawbacks: firstly, after the folding is formed, the middle pull rod is prevented from being excessively higher than the back rod, the volume after the integral folding is prevented from being excessively high, and the distance between the two back rods after the folding is still large and is not compact enough; and the inner ends of the four connecting rods are directly hinged with the corresponding outer sides of the corresponding movable pivot seats, so that effective support cannot be formed when the four connecting rods are in an unfolded state, the unfolded structure is not firm enough under the condition that an additional locking structure is not additionally arranged, the automatic inward folding condition after stress is easy to occur, and the use is greatly influenced.

Disclosure of Invention

The utility model provides a folding chair frame, which can effectively solve the prior technical problem.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a folding chair frame, folding chair frame includes left chair frame, the right chair frame that bilateral symmetry set up, left side chair frame, right chair frame all include back of the body pole unit, still include: the outer ends of the lifting mechanisms are hinged to a left upper pull rod, a right upper pull rod, a left lower pull rod and a right lower pull rod on the back rod unit; the lifting mechanism comprises an upper connecting seat and a lower connecting seat which are arranged at intervals, and the upper connecting seat and the lower connecting seat are connected through a cross mechanism; the inner end of the left upper pull rod is hinged on the right side of the upper connecting seat, and the inner end of the right upper pull rod is hinged on the left side of the upper connecting seat; the inner ends of the left lower pull rod and the right lower pull rod are hinged on the lower connecting seat; when the folding state is carried out, the left upper pull rod and the right upper pull rod are crossed.

In the above technical solution, further, the upper connecting seat is provided with two first mounting grooves arranged in a front-back staggered manner; the first mounting groove extends laterally and downwards to form an upper opening and a lower opening respectively; the upper openings of the two first mounting grooves are oppositely arranged; the upper end of the cross mechanism is hinged on the lower opening of the first mounting groove; the upper left pull rod and the upper right pull rod are respectively hinged at the middle end positions of the two first mounting grooves and are limited by the upper opening in the unfolding state.

In the above technical solution, further, when viewed from the back of the folding chair, in the fully unfolded state, the inner sides of the left upper pull rod and the right upper pull rod are partially overlapped; the inner sides of the left lower pull rod and the right lower pull rod are also partially overlapped.

In the above technical solution, further, the crossing mechanism includes a first crossing rod and a second crossing rod crossing in a staggered manner; viewed from the back of the folding chair: the upper end of the first cross rod is connected to the opposite front end of the upper connecting seat, and the lower end of the first cross rod is connected to the opposite rear end of the lower connecting seat; the upper end of the second cross rod is connected to the opposite rear end of the upper connecting seat, and the lower end of the second cross rod is connected to the opposite front end of the lower connecting seat.

In the above technical scheme, further, when folded, the first cross rod and the upper right pull rod are crossly superposed on the second cross rod and the upper left pull rod.

In the above technical solution, further, the inner end of the left lower pull rod is hinged to the right side of the lower connecting seat, and the inner end of the right lower pull rod is hinged to the left side of the lower connecting seat; when the folding state is achieved, the left lower pull rod and the right lower pull rod form a cross.

In the above technical scheme, further, the lower connecting seat is provided with two second mounting grooves which are arranged in a staggered manner from front to back, the opening directions of the second mounting grooves are opposite to each other, and the left lower pull rod and the right lower pull rod are respectively hinged to the end, far away from the opening, of the second mounting groove and are limited by the opening when in an unfolded state.

Among the above-mentioned technical scheme, further, be provided with the pull ring on the last connecting seat.

In the above technical solution, further, the front sides of the left chair frame and the rear chair frame are connected by a foldable mechanism.

Among the above-mentioned technical scheme, further, left chair frame, right chair frame all include: the upper ends of the front foot rod and the rear foot rod are hinged with each other through a connecting shaft, and the lower ends of the front foot rod and the rear foot rod are arranged at intervals to form an inverted V-shaped structure; the rear end of the seat rod unit is hinged with the lower end of the back rod unit and is connected to the rear foot rod in a sliding way through a sliding sleeve; the middle end of the armrest unit is movably arranged on the connecting shaft through an adjusting sheet, and the rear end of the armrest unit is hinged with the back rod unit;

the foldable mechanisms are arranged in a crossed manner, and four end points are respectively hinged to the front end of the seat rod unit and the lower end of the front foot rod;

and the left chair frame or/and the right chair frame is/are provided with a storage rack, and the storage rack is detachably arranged on the front foot rod and the rear foot rod.

The utility model discloses a beneficial effect is: the structure strength of the whole chair frame is higher when the chair frame is unfolded on the premise of ensuring the compact structure of the folded state.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of another view angle of the present invention.

Fig. 3 is a schematic structural diagram of a back viewing angle of the present invention.

Fig. 4 is a schematic structural view of the back folding mechanism of the present invention in a fully unfolded state.

Fig. 5 is a schematic view of the multi-angle structure of the back folding mechanism of the present invention in a semi-folded state.

Fig. 6 is a schematic view of the multi-angle structure of the back folding mechanism in the fully folded state.

Fig. 7 is a schematic view of the structure of the upper connecting seat of the present invention.

Fig. 8 is a schematic view of the structure of the lower connecting seat of the present invention.

In the figure, 11, a left chair frame, 12, a right chair frame, 2, a back rod unit, 31, a front foot rod, 32, a rear foot rod, 4, a seat rod unit, 5, a sliding sleeve, 6, an armrest unit, 61, an adjusting sheet, 7, a folding mechanism, 8, a back folding mechanism, 81, a lifting mechanism, 811, an upper connecting seat, 8111, a first mounting groove, 8112, an upper opening, 8113, a lower opening, 8114, a pull ring, 812, a lower connecting seat, 8121, a second mounting groove, 8122, an opening, 813, a cross mechanism, 8131, a first cross rod, 8132, a second cross rod, 82, a left upper pull rod, 83, a right upper pull rod, 84, a left lower pull rod, 85, a right lower pull rod and 9, a commodity shelf.

Detailed Description

Referring to fig. 1 to 8, a folding chair frame includes a left chair frame 11 and a right chair frame 12 which are arranged in bilateral symmetry, and both the left chair frame 11 and the right chair frame 12 include: a back bar unit 2; the upper ends of the front foot rod 31 and the rear foot rod 32 are hinged with each other through a connecting shaft, and the lower ends are arranged at intervals to form an inverted V-shaped structure; a seat rod unit 4, the rear end of which is hinged with the lower end of the back rod unit 2 and is connected with the rear foot rod 32 in a sliding way through a sliding sleeve 5; the middle end of the handrail unit 6 is movably arranged on the connecting shaft through an adjusting sheet 61, and the rear end of the handrail unit is hinged with the back rod unit 2. The prior art has disclosed the folding chair frame for front and back folding, and will not be described in detail herein.

In order to further realize left-right folding, the front sides of the left chair frame and the rear chair frame are connected through a foldable mechanism 7, the foldable mechanism 7 is arranged in a crossed manner and is hinged at the crossed point, and four end points of the foldable mechanism are respectively hinged at the front end of the seat rod unit 4 and the lower end of the front foot rod 31. The rear side of left chair frame and 11 right chair frame 12 sets up back folding mechanism 8, back folding mechanism 8 includes: a lifting mechanism 81, and a left upper pull rod 82, a right upper pull rod 83, a left lower pull rod 84 and a right lower pull rod 85 which are hinged on the back rod unit 2 at the outer ends. Specifically, the left upper pull rod 82 and the right upper pull rod 83 are arranged at the middle upper position of the back rod unit 2, the left lower pull rod 84 and the right lower pull rod 85 are arranged at the lower end position of the back rod unit 2, the lifting mechanism 81 comprises an upper connecting seat 811 and a lower connecting seat 812 which are arranged at intervals, and the upper connecting seat 811 and the lower connecting seat 812 are connected through a cross mechanism 813; meanwhile, the inner end of the left upper pull rod 82 is hinged on the right side of the upper connecting seat 811, and the inner end of the right upper pull rod 83 is hinged on the left side of the upper connecting seat 811; the inner ends of the left lower pull rod 84 and the right lower pull rod 85 are hinged on the lower connecting seat 812; when the folding state is achieved, the left upper pull rod 84 and the right upper pull rod 85 are crossed. The inner ends of the left lower pull rod 84 and the right lower pull rod 85 have two connection modes, and one of the two connection modes can be directly hinged with the two end parts of the lower connection seat 812 without overlapping; secondly, the inner end of the left lower pull rod 84 is hinged to the right side of the lower connecting seat 812, and the inner end of the right lower pull rod 85 is hinged to the left side of the lower connecting seat 812; in the folded state, the left lower rod 84 and the right lower rod 85 are crossed, and the unfolded structure is preferably more firm.

More specifically, the upper connecting seat 811 is provided with two first mounting grooves 8111 which are arranged in a staggered manner from front to back; the first mounting groove 8111 extends laterally and downwardly to form an upper opening 8112 and a lower opening 8113 respectively; the upper openings 8112 of the two first mounting grooves 8111 face opposite directions; the upper end of the cross mechanism 813 is hinged to the lower opening 8113 of the first mounting groove 8111; the left upper pull rod 82 and the right upper pull rod 83 are respectively hinged at the middle end positions of the two first mounting grooves 8111 and are limited by the upper opening 8112 in the unfolding state. Similarly, the lower connecting base 812 is provided with two second mounting grooves 8121 staggered back and forth, the openings 8122 of the second mounting grooves 8121 face opposite directions, and the left lower pull rod 84 and the right lower pull rod 85 are respectively hinged to the ends, far away from the openings 8122, of the second mounting grooves 8121 and are limited by the openings 8122 in the unfolded state.

The crossing mechanism 813 comprises a first crossing rod 8131 and a second crossing rod 8132 which are crossed in a staggered mode; viewed from the back of the chair (in the orientation shown in figure 3): the first cross bar 8131 has an upper end connected to the opposite front end of the upper connection seat 811 and a lower end connected to the opposite rear end of the lower connection seat 812; the second cross bar 8132 has an upper end connected to the opposite rear end of the upper connection seat 811 and a lower end connected to the opposite front end of the lower connection seat 812. In the folded state, as shown in fig. 6, the first cross bar 8131 and the right upper tie bar 83 are overlapped crosswise on the second cross bar 8132 and the left upper tie bar 82. When the folding chair is viewed from the back side, as shown in fig. 3, in the fully unfolded state, the inner sides of the left upper pull rod 82 and the right upper pull rod 83 are partially overlapped; the left lower link 84 and the right lower link 85 also partially overlap on the inner side.

For convenience of operation, the upper connecting seat 811 is provided with a pull ring 8114.

In order to promote the practicality, be provided with supporter 9 on the right side chair frame 12, supporter 9 detachably sets up 32 on preceding foot pole 31 and the back foot pole, and is concrete, and supporter 9 is provided with half open-ended knot portion, and during the expansion state, this knot portion will be blocked simultaneously and establish on preceding foot pole 31 and back foot pole 32, when folding around carrying on, the contained angle of preceding foot pole 31 and back foot pole 32 diminishes, and this knot portion breaks away from the lock this moment, and the supporter can be taken off.

Through the arrangement, because the upper left pull rod 82, the upper right pull rod 83, the lower left pull rod 84 and the lower right pull rod 85 are arranged in an overlapped mode, when the folding chair frame is in an unfolded state, the contact parts of the pull rods and the upper connecting seat and the lower connecting seat are more than those of the existing design, the stress supporting surface is wider, and the structural strength of the whole chair frame can be higher on the premise of ensuring the compact structure. Meanwhile, the cross mechanism 813 for connecting the upper connecting seat and the lower connecting seat can not interfere with the movement of the left upper pull rod 82 and the right upper pull rod 83 while providing support, and the implementation reliability is ensured.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention in any form, and the modifications, equivalent variations or modifications made on the basis of the technical solution of the present invention all fall into the protection scope of the present invention.

Claims

1. The utility model provides a folding chair frame, folding chair frame includes left chair frame, the right chair frame that bilateral symmetry set up, left side chair frame, right chair frame all include back of the body pole unit, its characterized in that still includes:

the outer ends of the lifting mechanisms are hinged to a left upper pull rod, a right upper pull rod, a left lower pull rod and a right lower pull rod on the back rod unit;

the lifting mechanism comprises an upper connecting seat and a lower connecting seat which are arranged at intervals, and the upper connecting seat and the lower connecting seat are connected through a cross mechanism;

the inner end of the left upper pull rod is hinged on the right side of the upper connecting seat, and the inner end of the right upper pull rod is hinged on the left side of the upper connecting seat;

the inner ends of the left lower pull rod and the right lower pull rod are hinged on the lower connecting seat;

when the folding state is achieved, the left upper pull rod and the right upper pull rod are crossed.

2. The folding chair frame according to claim 1, wherein the upper connecting seat is provided with two first mounting grooves which are arranged in a staggered manner from front to back; the first mounting groove extends laterally and downwards to form an upper opening and a lower opening respectively; the upper openings of the two first mounting grooves are oppositely arranged; the upper end of the cross mechanism is hinged on the lower opening of the first mounting groove; the upper left pull rod and the upper right pull rod are hinged to the middle end positions of the two first mounting grooves respectively and are limited by the upper opening when in an unfolded state.

3. The folding chair frame according to claim 1, wherein, when viewed from the back of the folding chair, the left upper pull rod and the right upper pull rod are partially overlapped at the inner side of the fully unfolded state; the inner sides of the left lower pull rod and the right lower pull rod are also partially overlapped.

4. A folding chair frame according to claim 1, characterised in that said crossing mechanism comprises a first crossing bar and a second crossing bar crossed in a staggered manner; viewed from the back of the folding chair: the upper end of the first cross rod is connected to the opposite front end of the upper connecting seat, and the lower end of the first cross rod is connected to the opposite rear end of the lower connecting seat; the upper end of the second cross rod is connected to the opposite rear end of the upper connecting seat, and the lower end of the second cross rod is connected to the opposite front end of the lower connecting seat.

5. A folding chair frame according to claim 4, characterized in that in the folded state, the first cross bar and the right upper pull bar are superposed crosswise on the second cross bar and the left upper pull bar.

6. The folding chair frame according to claim 1, wherein the inner end of the left lower pull rod is hinged on the right side of the lower connecting seat, and the inner end of the right lower pull rod is hinged on the left side of the lower connecting seat; when the folding state is achieved, the left lower pull rod and the right lower pull rod form a cross.

7. The folding chair frame of claim 1, wherein the lower connecting seat is provided with two second mounting grooves which are staggered back and forth, the openings of the second mounting grooves are oppositely arranged, and the left lower pull rod and the right lower pull rod are respectively hinged at the ends far away from the openings in the second mounting grooves and are limited by the openings in the unfolding state.

8. A folding chair frame according to claim 1, characterised in that said upper connecting base is provided with a pull ring.

9. A folding chair frame, according to any of claims 1-8, characterized in that the front sides of said left and rear frames are connected by a folding mechanism.

10. The folding chair frame of claim 9, wherein each of said left and right frames comprises: the upper ends of the front foot rod and the rear foot rod are hinged with each other through a connecting shaft, and the lower ends of the front foot rod and the rear foot rod are arranged at intervals to form an inverted V-shaped structure; the rear end of the seat rod unit is hinged with the lower end of the back rod unit and is connected to the rear foot rod in a sliding way through a sliding sleeve; the middle end of the armrest unit is movably arranged on the connecting shaft through an adjusting sheet, and the rear end of the armrest unit is hinged with the back rod unit;

the foldable mechanisms are arranged in a crossed manner, and four end points are respectively hinged to the front end of the seat rod unit and the lower end of the front foot rod; and the left chair frame or/and the right chair frame is/are provided with a storage rack, and the storage rack is detachably arranged on the front foot rod and the rear foot rod.