Lifting folding chair

Abstract

A lifting folding chair comprises a chair surface and a chair frame, and the chair frame comprises two seat rods, two backrest rods, two armrests, two foot rod units, a supporting rod unit and a connecting rod unit. The connecting rod unit comprises two upper connecting rods arranged left and right, two lower connecting rods arranged left and right, an upper pivoting seat, a lower pivoting seat and a pull rod, the far ends of the two upper connecting rods are respectively pivoted to the two backrest rods, and the close ends of the two upper connecting rods are respectively pivoted to the left and right ends of the upper pivoting seat; the far ends of the two lower connecting rods are pivoted to the portions, located behind the backrest rod, of the rear ends of the two seat rods respectively, the close ends of the two lower connecting rods are pivoted to the left end and the right end of the lower pivoting seat respectively, the upper end of the pull rod is connected to the middle of the upper pivoting seat, and the lower end of the pull rod is connected to the middle of the lower pivoting seat. The close ends of the two upper connecting rods and the two lower connecting rods can move upwards, and the far ends of the two upper connecting rods and the two lower connecting rods are close to each other. The lifting folding chair has the advantages of being high in stability, good in safety, comfortable to use and the like.

Description

Technical Field

[0001] The utility model relates to a chair, in particular to a lifting folding chair. Background Art

[0002] At present, there is a lifting folding chair on the market. Its chair frame includes two seat rods spaced left and right, two backrest rods spaced left and right and pivotally connected to the rear ends of the corresponding seat rods, two armrests spaced left and right and pivotally connected to the corresponding backrest rods, two leg rod units spaced left and right and pivotally connected to the corresponding armrests and seat rods, a support rod unit and a connecting rod unit. Among them, the support rod unit is pivotally arranged between the front ends of the two seat rods and the two leg rod units. The connecting rod unit includes an upper connecting rod group pivotally arranged between the upper parts of the two backrest rods and a lower connecting rod group pivotally arranged between the lower ends of the two backrest rods. The upper connecting rod group and the lower connecting rod group are connected by a pull handle. By pulling up the pull handle, the two backrest rods can be made to approach each other to achieve folding. This kind of lifting folding chair with such a structure has the following defects in actual use:

[0003] First, the two seat rods are the core load-bearing components when a person sits on the chair, so the support design for them is particularly crucial. In the above structure, both the upper and lower connecting rod groups are pivotally arranged between the two backrest rods and indirectly support the two seat rods through the connection between the two backrest rods and the two seat rods. There are certain deficiencies in the design of the support stability.

[0004] Second, the lower connecting rod group pivotally arranged between the lower ends of the two backrest rods is too close to the back of the chair cloth, resulting in that when a person sits on the chair cloth, the buttocks are likely to touch the lower connecting rod group, causing discomfort on the one hand and accidentally touching the lower connecting rod group to cause the folding chair to fold accidentally on the other hand.

[0005] Therefore, it is necessary for relevant practitioners to design a more reliable lifting folding chair. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a lifting folding chair with high stability, good safety and comfortable use.

[0007] The purpose of the utility model is realized through the following technical solutions:

[0008] A lifting folding chair, comprising a seat surface and a chair frame. The chair frame includes two seat rods spaced left and right, two backrest rods spaced left and right and pivotally connected to the rear ends of the corresponding seat rods, two armrests spaced left and right and located above the corresponding seat rods and pivotally connected to the corresponding backrest rods, two leg rod units spaced left and right and pivotally connected to the corresponding armrests and seat rods, a strut unit and a link unit. The strut unit includes two struts pivotally connected to each other. The upper ends of the two struts are respectively pivotally connected to the front ends of the two seat rods, and the lower ends of the two struts are respectively pivotally connected to the two leg rod units. The link unit includes two upper links arranged left and right, two lower links arranged left and right and located below the corresponding upper links, an upper pivot seat located between the two upper links, a lower pivot seat located between the two lower links, and a pull rod located between the upper pivot seat and the lower pivot seat. The far ends of the two upper links are respectively pivotally connected to the two backrest rods, the near ends of the two upper links are respectively pivotally connected to the left and right ends of the upper pivot seat, the far ends of the two lower links are respectively pivotally connected to the parts of the rear ends of the two seat rods behind the backrest rods, the near ends of the two lower links are respectively pivotally connected to the left and right ends of the lower pivot seat, the upper end of the pull rod is connected to the middle of the upper pivot seat, and the lower end of the pull rod is connected to the middle of the lower pivot seat. By pulling up the pull rod, the near ends of the two upper links and the two lower links can move upward, and the far ends of the two upper links and the two lower links can approach each other.

[0009] Further, the two lower links are located at a certain distance behind the two seat rods, and the two upper links are located at a certain distance behind the two backrest rods.

[0010] Further, first pivot shafts extending in the left-right direction are respectively provided on the opposite surfaces of the parts of the rear ends of the two seat rods behind the backrest rods, second pivot shafts extending in the front-rear direction are respectively provided on the front sides of the far ends of the two lower links, and two L-shaped pivot members are further included. One ends of the two L-shaped pivot members are respectively pivotally connected to the corresponding first pivot shafts, and the other ends are respectively pivotally connected to the corresponding second pivot shafts, so that the far ends of the two lower links are respectively pivotally connected to the parts of the rear ends of the two seat rods behind the backrest rods.

[0011] Further, U-shaped pivot members with forward openings are respectively pivotally provided on the front sides of the far ends of the two upper links. Each U-shaped pivot member is sleeved on the rear side of the corresponding backrest rod and rotatably connected thereto, so that the far ends of the two upper links are respectively pivotally connected to the two backrest rods.

[0012] Further, the far ends of the two upper links are respectively pivotally connected to the middle parts of the two backrest rods.

[0013] Further, when the link unit is in the unfolded state, the two upper links are respectively inclined downward from the end close to the same-side backrest rod to the end close to the upper pivot seat, the two lower links are respectively inclined downward from the end close to the same-side seat rod to the end close to the lower pivot seat, and the downward inclination angles of the two upper links and the two lower links are 5 to 15 degrees.

[0014] Furthermore, both the upper pivot seat and the lower pivot seat are U-shaped seat body structures that are arc-shaped and concave downward with downward openings. One ends of the two upper connecting rods, which are far from the backrest rods on the same side, respectively extend into the left and right ends of the upper pivot seat and are pivotally connected thereto. One ends of the two lower connecting rods, which are far from the seat rods on the same side, respectively extend into the left and right ends of the lower pivot seat and are pivotally connected thereto.

[0015] Furthermore, both armrests include an armrest frame pivotally connected to the corresponding backrest rod and an armrest bar provided on the armrest frame. Both footrest rod units include a front footrest rod and a rear footrest rod that are arranged at intervals front and rear. The upper ends of the front footrest rod and the rear footrest rod are respectively pivotally connected to the armrest frame of the corresponding armrest, and the middle upper parts of the front footrest rod and the rear footrest rod are respectively pivotally connected to the corresponding seat rod.

[0016] Furthermore, the lower ends of the two support rods are respectively pivotally connected to the lower ends of the front footrest rods of the two footrest rod units.

[0017] Compared with the prior art, the present utility model has the following beneficial effects:

[0018] In the link unit designed by the present utility model, the two upper connecting rods are pivotally arranged between the two backrest rods, and the two lower connecting rods are pivotally arranged between the two seat rods. Thus, when the lifting folding chair is unfolded and used, both the two backrest rods and the two seat rods can be directly and effectively supported, thereby improving the stability of the lifting folding chair to a certain extent. At the same time, since the two lower connecting rods are respectively pivotally connected to the parts of the two seat rods located behind the backrest rods at the rear ends, the two lower connecting rods and the lower pivot seat are all arranged at the rear and are far from the back of the chair surface. In this way, when a person sits on the chair surface, it is not easy to touch the lower link group formed by the two lower connecting rods and the lower pivot seat, and thus it is possible to avoid uncomfortable feelings of the human body or unsafe phenomena such as accidental folding caused by accidentally touching the lower link group. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front perspective view of a lifting folding chair of the present utility model.

[0020] Figure 2 is a front perspective view of the chair frame in the present utility model.

[0021] Figure 3 is a rear perspective view of the chair frame in the present utility model.

[0022] Figure 4 is Figure 3 an enlarged schematic view of A in

[0023] Figure 5 is Figure 3 an enlarged schematic view of B in

[0024] Figure 6 is a front exploded view of the link unit in the present utility model.

[0025] Figure 7 It is a schematic diagram of the folded state of the chair frame in the present utility model. Specific embodiments

[0026] The present utility model will be further described in detail below with reference to the embodiments given in the accompanying drawings.

[0027] As Figures 1 to 7 shown, a lift-fold chair provided by the present utility model includes a seat surface 1 and a chair frame 2. The chair frame 2 includes two seat rods 21 spaced left and right, two backrest rods 22 spaced left and right and pivotally connected to the rear ends of the corresponding seat rods 21, two armrests 23 spaced left and right and located above the corresponding seat rods 21 and pivotally connected to the corresponding backrest rods 22, two leg rod units 24 spaced left and right and pivotally connected to the corresponding armrests 23 and seat rods 21, a strut unit 25, and a link unit 26; the seat surface 1 is made of a flexible fabric material, such as cloth, and is sleeved on the two seat rods 21 and the two backrest rods 22.

[0028] As described above, the strut unit 25 includes two struts 251 pivotally connected to each other. The upper ends of the two struts 251 are respectively pivotally connected to the front ends of the two seat rods 21, and the lower ends of the two struts 251 are respectively pivotally connected to the two leg rod units 24. The link unit 26 includes two upper links 261 arranged left and right, two lower links 262 arranged left and right and located below the corresponding upper links 261, an upper pivot seat 263 located between the two upper links 261, a lower pivot seat 264 located between the two lower links 262, and a pull rod 265 located between the upper pivot seat 263 and the lower pivot seat 264. The opposite distal ends of the two upper links 261 are respectively pivotally connected to the two backrest rods 22, the adjacent proximal ends of the two upper links 261 are respectively pivotally connected to the left and right ends of the upper pivot seat 263, the opposite distal ends of the two lower links 262 are respectively pivotally connected to the parts 210 behind the backrest rods 22 at the rear ends of the two seat rods 21, the adjacent proximal ends of the two lower links 262 are respectively pivotally connected to the left and right ends of the lower pivot seat 264, the upper end of the pull rod 265 is connected to the middle of the upper pivot seat 263, and the lower end of the pull rod 262 is connected to the middle of the lower pivot seat 264. By pulling up the pull rod 265, the adjacent proximal ends of the two upper links 261 and the two lower links 262 can be moved upward, and the opposite distal ends of the two upper links 261 and the two lower links 262 can be made to approach each other, thereby pulling the two backrest rods 22 and the two seat rods 21 to approach each other and fold.

[0029] Since the upper two-link rods 261 and the lower two-link rods 262 are respectively pivotally provided between the two backrest rods 22 and the two seat rods 21, when the lift folding chair is unfolded and used, the two backrest rods 22 and the two seat rods 21 can both obtain direct and effective support, thereby improving the stability of the lift folding chair. At the same time, since the lower two-link rods 262 are respectively pivotally connected to the parts 210 at the rear ends of the two seat rods 21 and behind the backrest rods 22, the lower two-link rods 262 and the lower pivot seats 264 are both arranged at the rear and away from the back surface of the chair surface 1. In this way, when a person sits on the chair surface 1, it is not easy to touch the lower link group formed by the lower two-link rods 262 and the lower pivot seats 264, and thus it is possible to avoid unsafe phenomena such as discomfort of the human body or accidental folding caused by accidentally touching the lower link group.

[0030] In a preferred example of the present utility model, the lower two-link rods 262 are located at a certain distance behind the two seat rods 21, which further ensures that the lower two-link rods 262 and the lower pivot seats 264 can be away from the back surface of the chair surface 1. At the same time, the upper two-link rods 261 are located at a certain distance behind the two backrest rods 22, so that the upper two-link rods 261 and the upper pivot seats 263 can also be away from the back surface of the chair surface 1.

[0031] In a preferred example of the present utility model, first pivot shafts 2101 extending in the left-right direction are respectively provided on the opposite surfaces of the parts 210 at the rear ends of the two seat rods 21 and behind the backrest rods 22, and second pivot shafts 2621 extending in the front-rear direction are respectively provided on the front sides of the opposite distal ends of the lower two-link rods 262. The two L-shaped pivot members 266 are also included. One ends of the two L-shaped pivot members 266 are respectively pivotally connected to the corresponding first pivot shafts 2101, and the other ends are respectively pivotally connected to the corresponding second pivot shafts 2621, so that the opposite distal ends of the lower two-link rods 262 are respectively pivotally connected to the parts 210 at the rear ends of the two seat rods 21 and behind the backrest rods 22.

[0032] In a preferred example of the present utility model, U-shaped pivot members 267 with forward openings are respectively pivotally provided on the front sides of the opposite distal ends of the upper two-link rods 261. Each U-shaped pivot member 267 is sleeved on the rear side of the corresponding backrest rod 22 and rotatably connected thereto, so that the opposite distal ends of the upper two-link rods 261 are respectively pivotally connected to the two backrest rods 22.

[0033] Moreover, in order to ensure that the upper two-link rods 261 can provide more stable support for the two backrest rods 22, the opposite distal ends of the upper two-link rods 261 are respectively pivotally connected to the middle parts of the two backrest rods 22.

[0034] In a preferred example of the present utility model, when the link unit 26 is in the deployed state, the two upper links 261 respectively incline downward from the end close to the same-side backrest rod 22 to the end close to the upper pivot seat 263, and the two lower links 262 respectively incline downward from the end close to the same-side seat rod 21 to the end close to the lower pivot seat 264, and the downward inclination angles of the two upper links 261 and the two lower links 262 are 5 to 15 degrees. Such an angle design can make the support of the link unit 26 more stable. At the same time, it will not overly increase the lifting force when the link unit 26 is lifted upward for folding.

[0035] In a preferred example of the present utility model, both the upper pivot seat 263 and the lower pivot seat 264 are U-shaped seat body structures that are arc-shaped and concave downward and open downward. The ends of the two upper links 261 away from the same-side backrest rod 22 respectively extend into the left and right ends of the upper pivot seat 263 and are pivotally connected thereto, and the ends of the two lower links 262 away from the same-side seat rod 21 respectively extend into the left and right ends of the lower pivot seat 264 and are pivotally connected thereto.

[0036] In a preferred example of the present utility model, the two armrests 23 both include an armrest frame 231 pivotally connected to the corresponding backrest rod 22 and an armrest bar 232 provided on the armrest frame 231. The two footrest units 24 both include a front footrest rod 241 and a rear footrest rod 242 that are arranged at intervals front and rear. The upper ends of the front footrest rod 241 and the rear footrest rod 242 are respectively pivotally connected to the armrest frame 231 of the corresponding armrest 23, the middle upper parts of the front footrest rod 241 and the rear footrest rod 242 are respectively pivotally connected to the corresponding seat rod 21, and the lower ends of the two support rods 251 are respectively pivotally connected to the lower ends of the front footrest rods 241 of the two footrest units 24.

[0037] The above are only the preferred embodiments of the present utility model, and the scope of implementation of the present utility model cannot be limited thereby. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present utility model and the content of the utility model description still fall within the scope covered by the patent of the present utility model.

Claims

1. A lifting folding chair, comprising a seat surface and a chair frame. The chair frame includes two seat rods spaced left and right, two backrest rods spaced left and right and pivotally connected to the rear ends of the corresponding seat rods, two armrests spaced left and right and located above the corresponding seat rods and pivotally connected to the corresponding backrest rods, two leg rod units spaced left and right and pivotally connected to the corresponding armrests and seat rods, a strut unit and a link unit. The strut unit includes two struts pivotally connected to each other. The upper ends of the two struts are respectively pivotally connected to the front ends of the two seat rods, and the lower ends of the two struts are respectively pivotally connected to the two leg rod units, and is characterized in that: The link unit includes two upper links arranged left and right, two lower links arranged left and right and located below the corresponding upper links, an upper pivot seat located between the two upper links, a lower pivot seat located between the two lower links, and a pull rod located between the upper pivot seat and the lower pivot seat. The opposite distal ends of the two upper links are respectively pivotally connected to the two backrest rods, the adjacent proximal ends of the two upper links are respectively pivotally connected to the left and right ends of the upper pivot seat, the opposite distal ends of the two lower links are respectively pivotally connected to the parts of the rear ends of the two seat rods behind the backrest rods, the adjacent proximal ends of the two lower links are respectively pivotally connected to the left and right ends of the lower pivot seat, the upper end of the pull rod is connected to the middle of the upper pivot seat, and the lower end of the pull rod is connected to the middle of the lower pivot seat. Pulling up the pull rod can make the adjacent proximal ends of the two upper links and the two lower links move upward, and make the opposite distal ends of the two upper links and the two lower links approach each other.

2. The lift folding chair according to claim 1, characterized in that: The two lower links are located at a certain distance behind the two seat rods, and the two upper links are located at a certain distance behind the two backrest rods.

3. A lifting folding chair according to claim 2, characterized in that: On the opposite surfaces of the parts of the rear ends of the two seat rods behind the backrest rods, there are respectively provided a first pivot shaft extending in the left-right direction. On the front sides of the opposite distal ends of the two lower links, there are respectively provided a second pivot shaft extending in the front-rear direction. There are also two L-shaped pivot members. One ends of the two L-shaped pivot members are respectively pivotally connected to the corresponding first pivot shafts, and the other ends are respectively pivotally connected to the corresponding second pivot shafts, so that the opposite distal ends of the two lower links are respectively pivotally connected to the parts of the rear ends of the two seat rods behind the backrest rods.

4. A lifting folding chair according to claim 2, wherein: On the front sides of the opposite distal ends of the two upper links, there are respectively pivotally provided U-shaped pivot members with forward openings. Each U-shaped pivot member is sleeved on the rear side of the corresponding backrest rod and rotatably connected thereto, so that the opposite distal ends of the two upper links are respectively pivotally connected to the two backrest rods.

5. A lifting folding chair according to claim 1, characterized in that: The opposite distal ends of the two upper links are respectively pivotally connected to the middle parts of the two backrest rods.

6. A lifting folding chair according to claim 1, wherein: When the link unit is in the unfolded state, the two upper links respectively incline downward from the end close to the same-side backrest rod to the end close to the upper pivot seat, and the two lower links respectively incline downward from the end close to the same-side seat rod to the end close to the lower pivot seat, and the downward inclination angles of the two upper links and the two lower links are 5 to 15 degrees.

7. A lifting folding chair according to claim 1, characterized in that: Both the upper pivot seat and the lower pivot seat are U-shaped seat body structures that are arc-shaped and concave downward and open downward. The ends of the two upper links far from the same-side backrest rods respectively extend into the left and right ends of the upper pivot seat and are pivotally connected thereto. The ends of the two lower links far from the same-side seat rods respectively extend into the left and right ends of the lower pivot seat and are pivotally connected thereto.

8. A lifting folding chair according to claim 1, wherein: Both armrests include armrest frames pivotally connected to the corresponding backrest rods and armrest bars arranged on the armrest frames. Both footrest units include a front footrest and a rear footrest arranged at intervals front and rear. The upper ends of the front footrest and the rear footrest are respectively pivotally connected to the armrest frames of the corresponding armrests, and the middle upper parts of the front footrest and the rear footrest are respectively pivotally connected to the corresponding seat rods.

9. A lifting folding chair according to claim 8, characterized in that: The lower ends of the two support rods are respectively pivotally connected to the lower ends of the front footrests of the two footrest units.

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