Folding chair frame

Abstract

The utility model discloses a folding chair frame. The folding chair frame comprises a supporting cross rod, a supporting vertical rod and a supporting leg rod, a locking mechanism and a sliding sleeve are arranged on the supporting cross rod, and the sliding sleeve slides on the supporting cross rod and is locked through the locking mechanism; gears which are meshed with each other are arranged at the lower end of the supporting vertical rod and the upper end of the supporting leg rod and are rotationally mounted on the sliding sleeve; the first end of the linkage rod is rotationally connected to the supporting vertical rod, and the second end of the linkage rod is connected to the supporting transverse rod in a sliding mode; the spring is used for driving the second end of the linkage rod to move; the folding chair frame has a folded state and an unfolded state.

Description

Technical Field

[0001] The present application relates to the technical field of folding chairs, and in particular to a folding chair frame. Background Art

[0002] As a relatively close prior art, the folding chair proposed in Chinese patent publication number CN218999898U and CN215347885U can be referred to. Although the chair frame can be folded and stored, it mainly relies on the user to manually unlock and unfold it during operation, which is quite laborious. How to achieve fast and labor-saving unfolding while maintaining the convenience of folding is the purpose of the application. Summary of the invention

[0003] Based on the above technical problems, the present application provides a folding chair frame that can achieve rapid folding and unfolding of the chair frame.

[0004] The technical solution adopted by the present application to solve its technical problem is: a folding chair frame, including a supporting crossbar, a supporting vertical rod, and a supporting foot rod;

[0005] The support cross bar is provided with a locking mechanism and a sliding sleeve, and the sliding sleeve slides on the support cross bar and is locked by the locking mechanism;

[0006] The lower end of the supporting upright rod and the upper end of the supporting foot rod are provided with gears meshing with each other and are rotatably mounted on the sliding sleeve;

[0007] It also includes a linkage rod, wherein a first end of the linkage rod is rotatably connected to the support vertical rod, and a second end of the linkage rod is slidably connected to the support horizontal rod;

[0008] Also includes a spring for driving the second end of the linkage rod to move;

[0009] The folding chair frame has a folding state and an unfolding state:

[0010] In the folded state, the sliding sleeve is located in the middle of the supporting crossbar and is locked by the locking mechanism. At this time, the supporting upright rod and the supporting foot rod are folded and close to the supporting crossbar;

[0011] When in the unfolded state, the locking mechanism is unlocked, and the spring is used to drive the second end of the linkage rod to move toward the outer end of the support cross bar and drive the support vertical rod to rotate and unfold, synchronously drive the support foot rod to rotate and unfold, and at the same time drive the sliding sleeve to slide toward the outer end of the support cross bar.

[0012] In some embodiments, the locking mechanism includes a locking block, an unlocking button, and a locking pin. The locking block is fixedly installed at the middle position of the supporting cross bar, the locking pin is arranged in the supporting cross bar and partially extends out of the supporting cross bar, the locking pin is used to lock the sliding sleeve, and the unlocking button is used to drive the locking pin to retract into the supporting cross bar to unlock the sliding sleeve.

[0013] In some embodiments, a reset spring is also included for driving the unlocking button and / or locking pin.

[0014] In some embodiments, the support foot rods are provided in two groups, and a single group is respectively placed at both ends of the support cross bar. A single group of support foot rods includes two feet. Viewed in the axial direction of the support cross bar, the two support cross bars and the support vertical rod form a triangular support.

[0015] In some embodiments, the supporting cross bars include two bars arranged in parallel and spaced apart, forming a slide groove area therebetween. When the folding chair frame is in a folded state, the supporting vertical bars are located above the slide groove area, and the linkage rod is located within the slide groove area.

[0016] In some embodiments, two sets of rods are provided at the second end of the linkage rod, and each of the sets of rods is slidably fitted on two supporting cross bars.

[0017] In some embodiments, a U-shaped connecting portion is disposed at the first end of the linkage rod, and the U-shaped connecting portion is hingedly connected to the supporting upright pole.

[0018] In some embodiments, two support vertical rods are provided, respectively placed at two ends of the support horizontal rod.

[0019] In some embodiments, the upper ends of the two supporting poles are provided with hanging rings for installing the hammock.

[0020] In some embodiments, the support poles are retractable.

[0021] The beneficial effects of the present application are that the folding operation is relatively simple and can be achieved by manually pushing the sliding sleeve to lock it on the locking mechanism. At the same time, when it is necessary to unfold, the locking mechanism can be unlocked and the chair frame can be automatically unfolded under the action of the spring and the linkage rod. The operation is quick, convenient and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a schematic diagram of the overall structure of this application.

[0024] Figure 2 It is a schematic diagram of the folding chair frame structure of the present application.

[0025] Figure 3 It is a structural schematic diagram of the folding chair frame of the present application in the unfolded state.

[0026] Figure 4 It is a schematic diagram of the structure of the folding chair frame of the present application in the folded state.

[0027] Figure 5 It is a schematic diagram of the side structure of the folding chair frame of the present application.

[0028] Figure 6 It is a schematic diagram of the partial structure of the hidden sliding sleeve of the present application.

[0029] Figure 7 It is a partial structural schematic diagram of the hidden sliding sleeve and sleeve rod of the present application.

[0030] Figure numerals: 1. Support cross bar, 11. Slide groove area, 2. Support vertical rod, 21. Lifting ring, 3. Support foot rod, 4. Locking mechanism, 41. Locking block, 42. Unlocking button, 43. Locking pin, 5. Sliding sleeve, 6. Gear, 7. Linkage rod, 71. U-shaped connecting part, 72. Sleeve rod, 8. Spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to achieve. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection of this application.

[0032] Reference Figure 1-7 As shown, a folding chair frame is provided, which mainly includes a supporting cross bar 1, a supporting vertical bar 2, and a supporting foot bar 3.

[0033] Specifically, a locking mechanism 4 and a sliding sleeve 5 are provided on the support crossbar 1, and the sliding sleeve 5 slides on the support crossbar 1 and is locked by the locking mechanism 4;

[0034] The lower end of the support upright 2 and the upper end of the support foot 3 are provided with mutually meshing gears 6, and are rotatably mounted on the sliding sleeve 5; the two are linked together, that is, synchronous unfolding and synchronous folding can be achieved.

[0035] It also includes a linkage rod 7, a first end of which is rotatably connected to the support vertical rod 2, and a second end of which is slidably connected to the support horizontal rod 1;

[0036] Furthermore, it also includes a spring 8 for driving the second end of the linkage rod 7 to move.

[0037] The folding chair frame with the above-mentioned design structure has a folding state and an unfolding state when in use:

[0038] Reference Figure 4 As shown, in the folded state, the sliding sleeve 5 is located in the middle of the supporting crossbar 1 and is locked by the locking mechanism 4. At this time, the supporting upright rod 2 and the supporting foot rod 3 are folded and close to the supporting crossbar 1;

[0039] Reference Figure 2 and 3 As shown, in the unfolded state, the locking mechanism 4 is unlocked, and the spring 8 is used to drive the second end of the linkage rod 7 to move toward the outer end of the support cross bar 1 and drive the support vertical rod 2 to rotate and unfold, synchronously driving the support foot rod 3 to rotate and unfold, and at the same time driving the sliding sleeve 5 to slide toward the outer end of the support cross bar 1.

[0040] The locking mechanism 4 can be various, such as a manual latch fixation method, or a magnetic method, etc., as long as the sliding sleeve 5 can be fixed. As one of the embodiments, in the present application, the locking mechanism 4 includes a locking block 41, an unlocking button 42, and a locking pin 43. The locking block 41 is fixedly installed in the middle position of the support crossbar 1, and the locking pin 43 is arranged in the support crossbar 1 and partially extends out of the support crossbar 1. The locking pin 43 is used to lock the sliding sleeve 5, and the unlocking button 42 is used to drive the locking pin 43 to retract into the support crossbar 1 to unlock the sliding sleeve 5.

[0041] In order to achieve automatic resetting and facilitate operation, the locking mechanism 4 further includes a resetting spring (not shown in the figure) for driving the unlocking button 42 and / or the locking pin 43 .

[0042] In order to achieve better support and a smaller volume when folded, the support foot rods 3 are provided with two groups, and a single group is respectively placed at both ends of the support cross bar 1. The single group of support foot rods 3 includes two, and viewed in the axial direction of the support cross bar 1, refer to Figure 5 As shown, two supporting cross bars 1 and supporting vertical bars 2 form a triangular support.

[0043] In order to reduce the storage volume after folding and enhance the structural stability, the supporting cross bar 1 includes two parallel and spaced apart bars, forming a slide groove area 11 therebetween. When the folding chair frame is in a folded state, the supporting vertical bar 2 is located above the slide groove area 11, and the linkage rod 7 is located in the slide groove area 11.

[0044] Reference Figure 6-7 As shown, as one of the matching modes between the linkage rod 7 and the supporting cross bar 1 , the second end of the linkage rod 7 is provided with two sets of rods 72 , and the sets of rods 72 are respectively slidably matched on two supporting cross bars 1 .

[0045] As one of the matching modes of the linkage rod 7 and the support upright 2, the first end of the linkage rod 7 is provided with a U-shaped connection part, and the U-shaped connection part is hingedly connected to the support upright 2. In this way, the connection is reliable and the folded volume can be made as compact as possible.

[0046] In addition, two support vertical rods 2 are provided, which are respectively placed at the two ends of the support horizontal rod 1.

[0047] As some other extended features, for example, the upper ends of the two supporting uprights 2 are provided with hanging rings 21 for installing a hammock, thereby realizing the function of a hanging chair.

[0048] For another example, the support pole 2 is retractable to improve the functionality.

[0049] The working process of the present application is that the folding chair frame is transformed from the folded state to the unfolded state. In the folded state, the spring 8 is in a compressed state. When in use, the unlocking button 42 is pressed to unlock the sliding sleeve 5. Under the action of the spring 8, the second end of the linkage rod 7 moves outward and deflects, thereby driving the support rod 2 to rotate. Under the action of the meshing of the gear 6, the support foot rod 3 also rotates with the support rod 2. In this process, the sliding sleeve 5 is synchronously driven to slide outward, thereby finally forming the following. Figure 2 Shown in expanded state.

[0050] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present application, and the aforementioned embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A folding chair frame, characterized in that: Including supporting cross bars, supporting vertical bars, and supporting foot bars; The support cross bar is provided with a locking mechanism and a sliding sleeve, and the sliding sleeve slides on the support cross bar and is locked by the locking mechanism; The lower end of the supporting upright rod and the upper end of the supporting foot rod are provided with gears meshing with each other and are rotatably mounted on the sliding sleeve; It also includes a linkage rod, wherein a first end of the linkage rod is rotatably connected to the support vertical rod, and a second end of the linkage rod is slidably connected to the support horizontal rod; Also includes a spring for driving the second end of the linkage rod to move; The folding chair frame has a folding state and an unfolding state: In the folded state, the sliding sleeve is located in the middle of the supporting crossbar and is locked by the locking mechanism. At this time, the supporting upright rod and the supporting foot rod are folded and close to the supporting crossbar; When in the unfolded state, the locking mechanism is unlocked, and the spring is used to drive the second end of the linkage rod to move toward the outer end of the support cross bar and drive the support vertical rod to rotate and unfold, synchronously drive the support foot rod to rotate and unfold, and at the same time drive the sliding sleeve to slide toward the outer end of the support cross bar.

2. A folding chair frame according to claim 1, characterized in that: The locking mechanism includes a locking block, an unlocking button, and a locking pin. The locking block is fixedly installed at the middle position of the supporting cross bar. The locking pin is arranged in the supporting cross bar and partially extends out of the supporting cross bar. The locking pin is used to lock the sliding sleeve. The unlocking button is used to drive the locking pin to retract into the supporting cross bar to unlock the sliding sleeve.

3. A folding chair frame according to claim 2, characterized in that: It also includes a reset spring for driving the unlocking button and / or the locking pin.

4. A folding chair frame according to claim 1, characterized in that: The support foot rods are provided with two groups, and a single group is respectively placed at the two ends of the support cross bar. A single group of support foot rods includes two feet. Viewed from the axial direction of the support cross bar, the two support cross bars and the support vertical rod form a triangular support.

5. A folding chair frame according to claim 1, characterized in that: The supporting cross bars include two bars arranged in parallel and spaced apart, forming a slide groove area therebetween. When the folding chair frame is in a folded state, the supporting vertical bars are located above the slide groove area, and the linkage rod is located in the slide groove area.

6. A folding chair frame according to claim 5, characterized in that: The second end of the linkage rod is provided with two sets of rods, and each of the sets of rods is slidably matched on two supporting cross bars.

7. A folding chair frame according to claim 1 or 5, characterized in that: The first end of the linkage rod is provided with a U-shaped connection portion, and the U-shaped connection portion is hingedly connected to the supporting upright pole.

8. A folding chair frame according to claim 1 or 4, characterized in that: The supporting vertical rods are provided with two and are respectively placed at two ends of the supporting horizontal rod.

9. A folding chair frame according to claim 8, characterized in that: The upper ends of the two support poles are provided with hanging rings for installing the hammock.

10. A folding chair frame according to claim 9, characterized in that: The supporting pole is retractable.

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