Chair frame and chair

Abstract

The embodiment of the specification relates to the field of household article machinery, in particular to a chair frame and a chair. A chair frame comprises a first seat frame connecting rod, the first end of the first seat frame connecting rod in the length direction is hinged to a first seat frame supporting rod, and the second end of the first seat frame connecting rod in the length direction is hinged to the second end of a second foot stool connecting rod part in the length direction; a rod body of the second seat frame connecting rod is hinged to the first end, in the length direction, of the first foot stool connecting rod part, and the first end, in the length direction, of the first foot stool connecting rod part is connected with the second foot stool connecting rod part; and the length direction end of the auxiliary mounting rod is fixedly connected with the length direction first end of the second seat frame connecting rod. The auxiliary mounting rod is additionally arranged at the first end of the second seat frame connecting rod in the length direction, and the auxiliary mounting rod and the second seat frame connecting rod are integrally formed, so that after the first electric push rod is telescopically used for a long time, connection looseness of the auxiliary mounting rod and the second seat frame connecting rod cannot be caused, and the structural stability of the chair frame cannot become poor after the chair frame is used for a long time.

Description

Technical Field

[0001] This utility model relates to the field of household goods machinery, specifically to a chair frame and a seat. Background Technology

[0002] The applicant filed an invention patent application on April 1, 2024, entitled "A Zero-Gravity Seat," with application number 2024103822904. This patent discloses an adjustable electric push rod and a sliding seat mounting bracket. The power output end of the adjustable electric push rod is equipped with an electric push rod clamp, and the sliding seat mounting bracket has a first drive rod. The power output end of the adjustable electric push rod is clamped onto the first drive rod via the electric push rod clamp. The first drive rod and the sliding seat mounting bracket together form a movable seat frame, and the first drive rod and the sliding seat mounting bracket are connected by screws. After long-term extension and retraction, the connection between the first drive rod and the sliding seat mounting bracket may loosen, leading to loosening of the movable seat frame and ultimately reducing the structural stability of the chair frame. In addition, the power output end of the adjustable electric push rod is connected to the first drive rod by the electric push rod chuck. When the clamping force of the electric push rod chuck is small, the first drive rod can rotate relative to the adjustable electric push rod, but the rotation is not very smooth, which leads to the chair frame's unfolding or retracting action not being very smooth. Utility Model Content

[0003] The purpose of this utility model is to provide a chair frame and a seat that will not cause the structural stability of the chair frame to deteriorate under long-term use, and the chair frame has a high degree of smoothness in unfolding and retracting.

[0004] This utility model is achieved through the following technical solution:

[0005] A chair frame includes a leg support rod, a movable seat frame, and a fixed seat frame. The leg support rod includes a first leg support rod portion and a second leg support rod portion located on different planes. The movable seat frame includes two parallel first support plates, each of which is hinged to a first end in the longitudinal direction of the second leg support rod portion, the first end of the second leg support rod portion being the end connected to the first leg support rod portion. The fixed seat frame includes two parallel second support plates and a seat frame support rod first connecting the two second support plates. The chair frame also includes:

[0006] The first seat frame connecting rod has its first end in the length direction hinged to the seat frame support rod one, and its second end in the length direction hinged to the second end in the length direction of the leg connecting rod part two.

[0007] The second frame link has its body hinged to the first end of the first leg link part in the longitudinal direction, and the first end of the first leg link part in the longitudinal direction is the end connected to the second leg link part.

[0008] An auxiliary mounting rod, the length end of which is fixedly connected to the first length end of the second bracket connecting rod;

[0009] The first electric push rod has its first end in the extension direction hinged to the auxiliary mounting rod, and its second end in the extension direction hinged to the seat frame support rod.

[0010] Preferably, the first electric push rod includes a first push rod body and a first telescopic rod, an auxiliary mounting rod is provided with a first hinge plate assembly that is hinged to the first push rod body, and a seat frame support rod is provided with a second hinge plate assembly that is hinged to the first telescopic rod.

[0011] Preferably, the auxiliary mounting rod is arranged in the shape of a square tube.

[0012] Preferably, the second support rod includes a straight rod portion and an arc-shaped rod portion. The first end of the straight rod portion in the length direction is connected to the first end of the arc-shaped rod portion in the length direction, the second end of the arc-shaped rod portion in the length direction is connected to the auxiliary mounting rod, and the first end of the straight rod portion in the length direction is hinged to the first end of the support rod portion in the length direction.

[0013] As a preferred option, the chair frame also includes:

[0014] The backrest linkage frame includes a backrest connecting rod and a backrest mounting part; the first end of the backrest connecting rod in the longitudinal direction is hinged to the first support plate, and the second end of the backrest connecting rod in the longitudinal direction is hinged to the second end of the straight rod in the longitudinal direction.

[0015] As a preferred option, the chair frame also includes:

[0016] The third frame connecting rod has its first end in the length direction hinged to the first support plate, and its second end in the length direction hinged to the second end in the length direction of the second frame connecting rod.

[0017] The second backrest linkage frame includes a backrest support part, a backrest connecting part, and a backrest drive part; the backrest support part is hinged to the first support plate.

[0018] An auxiliary support rod, the length end of which is connected to the backrest drive unit;

[0019] The second electric push rod has its first end in the extension direction hinged to the auxiliary support rod, and its second end in the extension direction hinged to the first support plate.

[0020] Preferably, the second electric push rod includes a second push rod body and a second telescopic rod, and the auxiliary support rod is provided with a third hinge plate assembly that is hinged to the second push rod body, and the first support plate is provided with a plate frame that is hinged to the second telescopic rod.

[0021] Preferably, the backrest support is provided with a backrest movement limiting groove, and the first support plate is provided with a limiting protrusion that is assembled and connected with the backrest movement limiting groove.

[0022] Preferably, the movable seat frame also includes a seat frame support rod two connecting the two first support plates, and the seat frame support rod two is arranged in a square tube shape.

[0023] A type of seat, including the aforementioned seat frame.

[0024] In summary, this utility model has the following beneficial effects:

[0025] 1. An auxiliary mounting rod is added to the first end of the second seat frame connecting rod along its length. The auxiliary mounting rod is integrally formed with the second seat frame connecting rod. Therefore, after long-term extension and retraction of the first electric push rod, the connection between the auxiliary mounting rod and the second seat frame connecting rod will not become loose, and the structural stability of the chair frame will not deteriorate under long-term use.

[0026] 2. The first electric push rod is hinged to the auxiliary mounting rod, which makes the first electric push rod rotate more smoothly relative to the auxiliary mounting rod during the extension and retraction process, thereby making the unfolding or retraction of the chair frame smoother.

[0027] Further or more detailed beneficial effects will be described in conjunction with specific embodiments in the detailed implementation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the chair frame in Example 1 with the legs and backrest extended.

[0029] Figure 2 This is a schematic diagram of the retractable chair frame and backrest frame of Example 1.

[0030] Figure 3 yes Figure 1 A partial structural diagram of the chair frame;

[0031] Figure 4 This is a schematic diagram of the leg connecting rod in Example 1;

[0032] Figure 5 This is a schematic diagram of the movable seat frame in Embodiment 1;

[0033] Figure 6 This is a structural schematic diagram of the fixed seat frame in Embodiment 1;

[0034] Figure 7 This is a structural schematic diagram of the backrest linkage frame 1 in Embodiment 1;

[0035] Figure 8 This is a schematic diagram of the retractable chair frame and backrest frame of Example 2.

[0036] Figure 9 This is a schematic diagram of the chair frame in Example 2, showing the retractable legs and unfolded backrest.

[0037] Figure 10 This is a schematic diagram of the chair frame in Example 2 with both the legs and backrest extended.

[0038] Figure 11 yes Figure 10 A structural schematic diagram of the chair frame from another perspective;

[0039] Figure 12 yes Figure 10 A partial structural diagram of the chair frame;

[0040] Figure 13 This is a schematic diagram of the backrest linkage frame 2 in Embodiment 2. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings.

[0042] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0043] Example 1

[0044] This embodiment discloses a chair frame, such as Figure 1 and Figure 2 As shown, the chair frame includes a leg support 110, a movable seat frame 210, and a fixed seat frame 310. Figure 4 As shown, the tripod link 110 includes a first tripod link portion 111 and a second tripod link portion 112, which are not on the same plane. Figure 5 As shown, the movable seat frame 210 includes two parallel first support plates 211. Each first support plate 211 is hinged to a first end in the longitudinal direction of the second leg link 112, which is the end connected to the first leg link 111. Figure 6 As shown, the fixed seat frame 310 includes two parallel second support plates 311 and a seat frame support rod 312 connecting the two second support plates 311.

[0045] like Figure 1 and Figure 2 As shown, the chair frame also includes: a first seat frame link 510, a second seat frame link 520, an auxiliary mounting rod 530, and a first electric push rod 610.

[0046] The first end of the first seat frame connecting rod 510 is hinged to the first seat frame support rod 312 along its length, and the second end of the first seat frame connecting rod 510 is hinged to the second end of the second leg connecting rod 112 along its length. In the prior art, the first gear shifting slide rail connecting rod (corresponding to the first seat frame connecting rod 510 in this embodiment) requires a gear shifting slide rail and a gear shifting slide rail pin to be provided at the second end along its length. However, in this embodiment, the second end of the first seat frame connecting rod 510 only needs to be provided with a hinge hole, resulting in a simpler structure, easier manufacturing, and easier operation.

[0047] The body of the second frame connecting rod 520 is hinged to the first end of the leg connecting rod part 111 along its length, and the first end of the leg connecting rod part 111 is the end connected to the second leg connecting rod part 112. In the prior art, the first end of the second gear shifting slide rail connecting rod (corresponding to the second frame connecting rod 520 in this embodiment) along its length is hinged to the multi-mechanism linkage rod (corresponding to the leg connecting rod 110 in this embodiment), instead of the body of the rod being hinged to the multi-mechanism linkage rod.

[0048] The longitudinal end of the auxiliary mounting rod 530 is fixedly connected to the longitudinal first end of the second seat frame connecting rod 520. In the prior art, the longitudinal first end of the second gear shifting slide rail connecting rod (corresponding to the second seat frame connecting rod 520 in this embodiment) is hinged to the multi-mechanism linkage rod (corresponding to the leg connecting rod 110 in this embodiment), while in this embodiment, the longitudinal first end of the second seat frame connecting rod 520 is connected to the auxiliary mounting rod 530, which is used to connect to the first electric push rod 610. In this embodiment, the auxiliary mounting rod 530 and the second seat frame connecting rod 520 are integrally formed.

[0049] The first end of the first electric push rod 610 in the extension direction is hinged to the auxiliary mounting rod 530, and the second end of the first electric push rod 610 in the extension direction is hinged to the seat frame support rod 312. In the prior art, the adjustable electric push rod (corresponding to the first electric push rod 610 in this embodiment) is connected to the first drive rod on the sliding seat mounting frame (corresponding to the movable seat frame 210 in this embodiment) by a clamp, while the first electric push rod 610 in this embodiment is hinged to the auxiliary mounting rod 530.

[0050] First, due to limitations in chair frame assembly, the first support plate 211 of the movable seat frame 210 and the second seat frame support rod 214 cannot be integrally formed. Therefore, in this embodiment, an auxiliary mounting rod 530 is added to the first end of the second seat frame connecting rod 520 along its length. The auxiliary mounting rod 530 is integrally formed with the second seat frame connecting rod 520, so after long-term extension and retraction, the connection between the auxiliary mounting rod 530 and the second seat frame connecting rod 520 will not loosen, thus preventing a decrease in the structural stability of the chair frame during long-term use. Second, in this embodiment, the first electric push rod 610 and the auxiliary mounting rod 530 are hinged, making the rotation of the first electric push rod 610 relative to the auxiliary mounting rod 530 smoother during extension and retraction, thereby making the unfolding or retraction of the chair frame smoother.

[0051] In addition, such as Figure 5 As shown, the movable seat frame 210 also includes a seat frame support rod 214 connecting the two first support plates 211. The seat frame support rod 214 is arranged in a square tube shape. In the prior art, the adjustable electric push rod (corresponding to the first electric push rod 610 in this embodiment) and the first drive rod on the sliding seat mounting frame (corresponding to the seat frame support rod 214 in this embodiment) are connected by clamps. Therefore, the first drive rod must be in the shape of a thin round rod. However, in this embodiment, the first electric push rod 610 does not need to be connected to the seat frame support rod 214. Therefore, the seat frame support rod 214 can be arranged in a square tube shape, thereby improving the structural strength of the seat frame support rod 214 and ultimately improving the structural strength of the movable seat frame 210.

[0052] Furthermore, such as Figure 3 As shown, the first electric push rod 610 in this embodiment includes a first push rod body 611 and a first telescopic rod 612. The auxiliary mounting rod 530 is provided with a first hinge plate group 531 that is hinged to the first push rod body 611, and the seat frame support rod 312 is provided with a second hinge plate group 313 that is hinged to the first telescopic rod 612.

[0053] The first hinge plate assembly 531 includes two symmetrically arranged hinge plates, and the first hinge plate assembly 531 can be positioned below the auxiliary mounting rod 530 (in...). Figure 3 From the perspective of [the location], the first end of the extension / retraction direction of the first electric push rod 610 is located below the auxiliary mounting rod 530. The second hinge plate assembly 313 includes two symmetrically arranged hinge plates, and the second hinge plate assembly 313 can be arranged above the seat frame support rod 312 (in [the location]). Figure 3From the perspective of [the viewpoint], the second end of the extension / retraction direction of the first electric push rod 610 is positioned above the seat frame support rod 312. Furthermore, the actuating end of the first extension rod 612 of the first electric push rod 610 is connected to the seat frame support rod 312 via the second hinge plate assembly 313. This structure allows the first electric push rod 610 to smoothly and effectively extend or retract the chair frame.

[0054] The auxiliary mounting rod 530 is arranged in a square tube shape, which can improve the structural strength of the auxiliary mounting rod 530 and facilitate the installation and connection of the first hinge plate assembly 531.

[0055] Furthermore, the second frame connecting rod 520 in this embodiment includes a straight rod portion and an arc-shaped rod portion. The first end of the straight rod portion in the length direction is connected to the first end of the arc-shaped rod portion in the length direction, the second end of the arc-shaped rod portion in the length direction is connected to the auxiliary mounting rod 530, and the first end of the straight rod portion in the length direction is hinged to the first end of the leg connecting rod portion 111 in the length direction.

[0056] The curved rod is bent upwards (in) Figure 3 From the perspective of [the camera], the position of the auxiliary mounting rod 530 relative to the second bracket connecting rod 520 can be increased, thereby allowing the first end of the extension and retraction direction of the first electric push rod 610 to be positioned below the auxiliary mounting rod 530.

[0057] Furthermore, such as Figure 7 As shown, the chair frame in this embodiment also includes: a backrest linkage frame 410.

[0058] The backrest linkage frame 410 includes a backrest link 411 and a backrest mounting part 412. The first end of the backrest link 411 in the longitudinal direction is hinged to the first support plate 211, and the second end of the backrest link 411 in the longitudinal direction is hinged to the second end of the straight rod in the longitudinal direction.

[0059] The backrest linkage frame 410 in this embodiment can be the same as the backrest angle adjustment plate structure in the prior art.

[0060] Example 2

[0061] This embodiment discloses a chair frame, such as Figures 8 to 10 As shown, the chair frame in this embodiment also includes: a third seat frame link 540, a backrest linkage frame 420, an auxiliary support rod 430, and a second electric push rod 710.

[0062] like Figure 11 As shown, the first end of the third frame connecting rod 540 in the length direction is hinged to the first support plate 211, and the second end of the third frame connecting rod 540 in the length direction is hinged to the second end of the second frame connecting rod 520 in the length direction.

[0063] like Figure 12As shown, the second backrest linkage frame 420 includes a backrest support part 421, a backrest connecting part 422, and a backrest driving part 423. The backrest support part 421 is hinged to the first support plate 211. The backrest connecting part 422 is used to install the backrest body.

[0064] The longitudinal end of the auxiliary support rod 430 is connected to the backrest drive unit 423. The backrest drive unit 423 may have a support rod receiving opening, into which the end of the auxiliary support rod 430 is inserted, and the end of the auxiliary support rod 430 may be welded and fixed to the support rod receiving opening of the backrest drive unit 423. The auxiliary support rod 430 is used to mount the second electric push rod 710.

[0065] The first end of the second electric push rod 710 in the extension direction is hinged to the auxiliary support rod 430, and the second end of the second electric push rod 710 in the extension direction is hinged to the first support plate 211.

[0066] The difference between this embodiment and the chair frame in Embodiment 1 lies in the improvement of the backrest linkage frame 410. The backrest linkage frame 410 is replaced by a third seat frame link 540 and a second backrest linkage frame 420, and an auxiliary support rod 430 and a second electric push rod 710 are added. In Embodiment 1, the legs and backrest frame move synchronously; either they extend together or retract together. However, in this embodiment, through the arrangement of the third seat frame link 540, the second backrest linkage frame 420, the auxiliary support rod 430, and the second electric push rod 710, the legs and backrest frame can move separately. The legs are controlled to extend or retract by the first electric push rod 610, and the backrest frame is controlled to extend or retract by the second electric push rod 710. Figure 8 As shown, when the first electric push rod 610 retracts, the leg frame retracts; when the second electric push rod 710 extends, the backrest frame retracts. Figure 9 As shown, when the first electric push rod 610 retracts, the leg frame retracts; when the second electric push rod 710 retracts, the backrest frame unfolds. Figure 10 As shown, when the first electric push rod 610 extends, the legs unfold; when the second electric push rod 710 retracts, the backrest unfolds.

[0067] Furthermore, such as Figure 12 As shown, the second electric push rod 710 in this embodiment includes a second push rod body 711 and a second telescopic rod 712. The auxiliary support rod 430 is provided with a third hinge plate group 431 that is hinged to the second push rod body 711. The first support plate 211 is provided with a plate frame 212 that is hinged to the second telescopic rod 712.

[0068] The third hinge plate assembly 431 includes two symmetrically arranged hinge plates. The third hinge plate assembly 431 can be arranged on the side of the auxiliary support rod 430 facing the seat frame support rod 214 (in... Figure 12(From the perspective of...) The frame 212 includes a first U-shaped frame and a second U-shaped frame. The first U-shaped frame is connected and fixed to the first support plate 211, and the second U-shaped frame is connected to the free end of the second telescopic rod 712, and the second U-shaped frame is hinged to the first U-shaped frame. The second electric push rod 710 of this structure enables the backrest frame to smoothly and effectively extend or retract.

[0069] Furthermore, such as Figure 13 As shown, the backrest support 421 of this embodiment is provided with a backrest movement limiting groove 424, and the first support plate 211 is provided with a limiting protrusion 213 that is assembled and connected with the backrest movement limiting groove 424.

[0070] The backrest support 421 is also provided with a hinge hole for assembly and connection with the first support plate 211. The backrest movement limiting groove 424 is arranged in an arc shape around the hinge hole, and the backrest movement limiting groove 424 is used to limit the maximum unfolded position and the maximum retracted position of the backrest frame. Figure 8 As shown, when the second telescopic rod 712 of the second electric push rod 710 extends to the rightmost position of the limiting protrusion 213 in the backrest movement limiting groove 424 (in Figure 8 From the perspective of (seeing), this indicates that the backrest is at its maximum retracted position; such as Figure 9 As shown, when the second telescopic rod 712 of the second electric push rod 710 retracts to the position where the limiting protrusion 213 is located at the leftmost side of the backrest movement limiting groove 424 (in Figure 9 From [the perspective of the user], this indicates that the backrest is already in its maximum extended position.

[0071] In this embodiment, the backrest frame can be extended or retracted within a suitable range by setting the backrest movement limiting groove 424 and the limiting protrusion 213.

[0072] Example 3

[0073] A chair, including the chair frame of embodiment 1.

[0074] Example 4

[0075] A chair, including the chair frame of embodiment 2.

Claims

1. A chair frame comprising a foot frame link (110), a movable seat frame (210) and a fixed seat frame (310); the foot frame link (110) comprises a foot frame link part one (111) and a foot frame link part two (112) which are not in the same plane; the movable seat frame (210) comprises two first support plates (211) which are arranged in parallel, each of the first support plates (211) is hinged to a lengthwise first end of the foot frame link part two (112), the lengthwise first end of the foot frame link part two (112) is the end connected with the foot frame link part one (111); the fixed seat frame (310) comprises two second support plates (311) which are arranged in parallel, and a seat frame support rod one (312) connecting the two second support plates (311); characterized in that, The chair frame further comprises: A first seat frame connecting rod (510) having a first end hingedly connected to the seat frame support rod (312), and a second end hingedly connected to a second end of the second leg connecting rod (112); A second seat frame connecting rod (520) having a rod body hingedly connected to a first end of the first leg connecting rod (111), the first end of the first leg connecting rod (111) being connected to the second leg connecting rod (112); An auxiliary mounting rod (530) having a first end hingedly connected to a first end of the second seat frame connecting rod (520); A first electric push rod (610) having a first end hingedly connected to the auxiliary mounting rod (530), and a second end hingedly connected to the seat frame support rod (312).

2. The chair frame of claim 1, wherein The first electric push rod (610) comprises a first push rod body (611) and a first telescopic rod (612), and the auxiliary mounting rod (530) is provided with a first hinged plate group (531) hingedly connected to the first push rod body (611), and the seat frame support rod (312) is provided with a second hinged plate group (313) hingedly connected to the first telescopic rod (612).

3. The chair frame of claim 2, wherein, The auxiliary mounting rod (530) is in the form of a square tube.

4. The chair frame of claim 2, wherein, The second seat frame connecting rod (520) comprises a straight rod portion and an arc-shaped rod portion, a first end of the straight rod portion is connected to a first end of the arc-shaped rod portion, a second end of the arc-shaped rod portion is connected to the auxiliary mounting rod (530), and a first end of the straight rod portion is hingedly connected to a first end of the first leg connecting rod (111).

5. The chair frame of claim 4, wherein, The chair frame further comprises: A backrest linkage frame (410) comprising a backrest connecting rod portion (411) and a backrest mounting portion (412), a first end of the backrest connecting rod portion (411) is hingedly connected to the first support plate (211), and a second end of the backrest connecting rod portion (411) is hingedly connected to a second end of the straight rod portion.

6. The chair frame of claim 4, wherein, The chair frame further comprises: A third seat frame connecting rod (540) having a first end hingedly connected to the first support plate (211), and a second end hingedly connected to a second end of the second seat frame connecting rod (520); A backrest linkage frame (420) comprising a backrest support portion (421), a backrest connecting portion (422), and a backrest driving portion (423), the backrest support portion (421) is hingedly connected to the first support plate (211); An auxiliary support rod (430) having a first end connected to the backrest driving portion (423); A second electric push rod (710) having a first end hingedly connected to the auxiliary support rod (430), and a second end hingedly connected to the first support plate (211).

7. The chair frame of claim 6, wherein, The second electric push rod (710) comprises a second push rod body (711) and a second telescopic rod (712), the auxiliary support rod (430) is provided with a third hinged plate group (431) hinged with the second push rod body (711), and the first support plate (211) is provided with a plate frame (212) hinged with the second telescopic rod (712).

8. The chair frame of claim 6, wherein, The backrest support part (421) is provided with a backrest movement limiting slot (424), and the first support plate (211) is provided with a limiting protrusion (213) assembled and connected with the backrest movement limiting slot (424).

9. The chair frame of claim 1, wherein, The movable seat frame (210) further comprises a seat frame support rod two (214) connecting the two first support plates (211), and the seat frame support rod two (214) is in the form of a square tube.

10. A seat, characterized by The chair frame comprises any one of claims 1 to 9.

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