A folding chair

Abstract

The application discloses a folding chair, which comprises a supporting frame, the supporting frame comprises a supporting base frame and a plug-in rod detachably mounted on the supporting base frame, the supporting base frame comprises a pair of first horizontal rods and a pair of second horizontal rods, the two ends of each first horizontal rod are connected with two second horizontal rods through connecting pieces and surrounded to form a frame type, and the supporting base frame can be folded through the two first horizontal rods; each first horizontal rod comprises two folding rods which are hingedly connected with each other, and the outer end of each folding rod is hingedly connected with the connecting piece of the supporting base frame; a locking sleeve is slidably arranged on each first horizontal rod, the hingedly connected joint of the two folding rods is covered by sliding the locking sleeve, so that the supporting base frame is locked to an unfolded state, and the first horizontal rod can be folded and the supporting base frame can be folded by sliding the locking sleeve to make the locking sleeve be separated from the joint of the two folding rods.

Description

Technical Field

[0001] This application relates to the field of chair technology, and in particular to a folding chair. Background Technology

[0002] Folding chairs are widely used in outdoor leisure, camping, and home use due to their ease of storage and portability.

[0003] Existing folding chairs typically employ a foldable frame design, such as the folding space chair disclosed in Chinese Patent Publication No. CN215347878U. This chair is hinged to a C-shaped body via two arc-shaped rods, allowing the folding support frame to be folded and unfolded by pushing the C-shaped body. However, this method, when unfolded, is prone to automatically folding under impact or other external forces, resulting in poor stability. This application aims to disclose an alternative folding and unfolding method to overcome these shortcomings.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0005] Based on this, this application provides a folding chair to solve one of the aforementioned technical problems.

[0006] The technical solution adopted by this application to solve its technical problem is: a folding chair, including a support frame, the support frame including a support base and a plug rod detachably installed on the support base, the support base including a pair of first crossbars and second crossbars, the two ends of the first crossbars are respectively connected to the two second crossbars through connectors and form a frame, the support base can be folded up by folding the two first crossbars; The first crossbar includes two hinged folding rods, the outer ends of which are hinged to the connecting parts of the supporting base frame; A locking sleeve is slidably provided on the first crossbar. By sliding the locking sleeve to cover the hinge joint of the two folding rods, the support base can be locked to the unfolded state. Sliding the locking sleeve to disengage it from the joint of the two folding rods allows the first crossbar to be folded to close the support base.

[0007] In some embodiments, two limiting protrusions are provided on the outer wall of a single first crossbar, one of which is located near the joint of the two folding bars, and the other is located near the second crossbar.

[0008] In some embodiments, one end of the folding rod is provided with an opening slot, and the first crossbar further includes an intermediate connecting plate for connecting the two folding rods, the end of the intermediate connecting plate being hinged in the opening slot; when the first crossbar is unfolded, the end faces of the two folding rods abut against each other, and the intermediate connecting plate is completely placed in the opening slot.

[0009] In some embodiments, the locking sleeve has a double-layer structure, with an inner plastic sleeve and an outer metal sleeve.

[0010] In some embodiments, the locking sleeve is further provided with a self-locking mechanism. When the locking sleeve locks the first crossbar, the self-locking mechanism can automatically lock the locking sleeve onto the first crossbar to maintain the first crossbar in an extended state. The locking sleeve can be unlocked by manually operating the self-locking mechanism.

[0011] In some embodiments, a locking hole is provided on one of the folding rods. The self-locking mechanism includes an elastic element, a locking pin, and an unlocking element. One end of the elastic element is fixed inside the locking sleeve, and the other end is fixed with a locking pin. The unlocking element slides on the locking sleeve. The self-locking mechanism locks the position of the locking sleeve by inserting the locking pin into the locking hole. Sliding the unlocking element can drive the locking pin to disengage from the locking hole, thereby completing the unlocking.

[0012] In some embodiments, the support frame further includes a plurality of connectors, with the two ends of the second crossbar being transversely inserted into the two connectors respectively, and the two ends of the first crossbar being hinged to the two connectors respectively.

[0013] In some embodiments, the connector rod includes an upper connector rod and a lower connector rod, with the upper connector rod and the lower connector rod respectively inserted into the top and bottom of the connector.

[0014] In some embodiments, the upper insertion rod is inserted diagonally downward into the connector, and the lower insertion rod is inserted diagonally upward into the connector. Both the upper and lower insertion rods extend outward from the support base, and a support foot is fixed to the bottom of the lower insertion rod.

[0015] In some embodiments, a seat surface is provided on the top of the support frame.

[0016] The beneficial effects of this application are as follows: This application locks or unlocks the two folding bars by sliding a locking sleeve on the first crossbar to keep the first crossbar in the unfolded state, and it will not automatically unlock when it is hit, thereby improving the stability of the support frame. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional schematic diagram of this application.

[0019] Figure 2 This is a three-dimensional schematic diagram from another angle of this application.

[0020] Figure 3 This is a schematic diagram of the first crossbar and locking sleeve in the locked state of this application.

[0021] Figure 4 This is a schematic diagram of the unlocked state of the first horizontal bar and locking sleeve in this application.

[0022] Figure 5 This is a schematic diagram of the explosion of the two folded rods in this application.

[0023] Figure 6 This is a partial cross-sectional schematic diagram of one embodiment of this application.

[0024] Figure 7 This application is Figure 6 Enlarged diagram of point A.

[0025] The reference numerals in the attached diagram are as follows: 1. Support base frame; 2. Connecting rod; 201. Upper connecting rod; 202. Lower connecting rod; 3. First crossbar; 301. Folding rod; 302. Middle connecting plate; 4. Second crossbar; 5. Locking sleeve; 501. Inner sleeve; 502. Outer sleeve; 6. Limiting protrusion; 7. Opening groove; 8. Locking hole; 9. Elastic element; 10. Locking pin; 11. Unlocking element; 12. Connecting element; 13. Support leg. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0027] In the embodiments of this application, please refer to Figure 1-7 As shown, this folding chair mainly includes: a support frame, which includes a support base 1 and a connecting rod 2 detachably mounted on the support base 1. The support base 1 includes a pair of first crossbars 3 and second crossbars 4. The two ends of the first crossbars 3 are respectively connected to the two second crossbars 4 through connectors. The support base 1 is rectangular when fully unfolded. The support base 1 can be folded by bending the two first crossbars 3. When folding, the first crossbars 3 need to be pushed towards the center of the support base 1. The first crossbar 3 includes two folding rods 301 and an intermediate connecting piece. The support frame 1 is constructed with a plate 302. One end of the folding rod 301 is hinged to the connector of the support base 1, and the other end is hinged to another folding rod via an intermediate connecting plate 302. Both ends of the intermediate connecting plate 302 are respectively hinged to the ends of the two folding rods 301. A locking sleeve 5 is slidably provided on the first crossbar 3. By sliding the locking sleeve 5 to cover the joint of the two folding rods 301, the support base 1 can be locked to the unfolded state. By sliding the locking sleeve 5 to disengage it from the joint of the two folding rods 301, the first crossbar 3 can be bent to fold the support base 1. Specifically, during folding, the bending plate needs to be rotated towards the center of the support base 1, and the two second crossbars 4 need to be brought together. The insertion rod 2 can be detached from the support base 1 to achieve the folding of the support frame.

[0028] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0029] Furthermore, two limiting protrusions 6 are provided on the outer wall of a single first crossbar 3. One limiting protrusion 6 is located near the joint of the two folding rods 301, and the other limiting protrusion 6 is located near the second crossbar 4. Specifically, when the locking sleeve 5 is slid-locked so that one end of the locking sleeve 5 abuts against the limiting protrusion 6 near the joint of the two folding rods 301, the locking sleeve 5 completely covers the joint of the two folding rods 301. At this time, the two folding rods 301 are in a straight line and locked, and cannot be bent. Similarly, when the locking sleeve 5 is slid-locked in the opposite direction so that its end abuts against the other limiting protrusion 6, the locking sleeve 5 is unlocked, and the two folding rods 301 can be bent to fold and support the base frame 1.

[0030] Furthermore, one end of the folding rod 301 is provided with an opening slot 7, and the end of the intermediate connecting plate 302 is hinged within the opening slot 7; when the first crossbar 3 is unfolded, the end faces of the two folding rods 301 abut against each other, while the intermediate connecting plate 302 is completely placed within the opening slot 7. Specifically, as follows... Figure 4-5As shown, the opening slot 7 is open in the direction of the end of the bending part and in the horizontal direction of the back of the support base 1. The two openings are connected to each other, so that the folding rod 301 can only be bent in the direction of the inside / center of the support base 1 after unlocking.

[0031] like Figure 6 As shown, the locking sleeve 5 has a double-layer structure, with an inner plastic sleeve 501 and an outer metal sleeve 502. The plastic inner sleeve 501 can prevent scratches on the folding rod 301, while the metal sleeve 502 can increase the overall strength of the locking sleeve 5.

[0032] In some embodiments, the locking sleeve 5 is further provided with a self-locking mechanism. When the locking sleeve 5 locks the first crossbar 3, the self-locking mechanism can automatically lock the locking sleeve 5 onto the first crossbar 3 to maintain the first crossbar 3 in an unfolded state. The locking sleeve 5 can be unlocked by manually operating the self-locking mechanism.

[0033] Furthermore, a locking hole 8 is provided on the folding rod 301. In one embodiment of the self-locking mechanism, such as... Figure 6-7 As shown, the self-locking mechanism includes an elastic element 9, a locking pin 10, and an unlocking element 11. One end of the elastic element 9 is fixed inside the locking sleeve 5, and the other end is fixed with the locking pin 10. The unlocking element 11 slides on the locking sleeve 5. The self-locking mechanism locks the position of the locking sleeve 5 by inserting the locking pin 10 into the locking hole 8. Sliding the unlocking element 11 can drive the locking pin 10 to disengage from the locking hole 8, thus completing the unlocking. The elastic element 9 can be a spring or an elastic sheet. The unlocking element 11 drives the locking pin 10 to disengage from the locking hole 8 by pushing the middle of the elastic element 9.

[0034] In another embodiment of the self-locking mechanism, the self-locking mechanism consists of a spring and a locking bead. The end of the locking pin is rounded. The locking sleeve 5 can be self-locked by inserting the locking bead into the locking hole 8. The locking bead can be disengaged from the locking hole 8 by forcefully moving the locking sleeve 5.

[0035] like Figure 1-2 As shown, the support base 1 also includes a plurality of connectors 12. The two ends of the second crossbar 4 are respectively inserted laterally into the two connectors 12, and the two ends of the first crossbar 3 are respectively hinged to the two connectors 12.

[0036] Furthermore, the plug rod 2 includes an upper plug rod 201 and a lower plug rod 202. The upper plug rod 201 and the lower plug rod 202 are respectively plugged into the top and bottom of the connector 12. The upper plug rod 201 is divided into two sets of plug rods 2 with different lengths, and the two sets of upper plug rods 201 are arranged in pairs.

[0037] Furthermore, the upper insertion rod 201 is inserted diagonally downward into the connector 12, and the lower insertion rod 202 is inserted diagonally upward into the connector 12. Both the upper insertion rod 201 and the lower insertion rod 202 extend outward from the support base 1, and the bottom of the lower insertion rod 202 is fixed with a support leg 13.

[0038] In some embodiments, a seat is provided on the top of the support frame, and the four corners of the seat are detachably fixed to the top of two sets of upper plug rods 201.

[0039] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A folding chair, comprising a support frame, characterized in that, The support frame includes a support base and a plug-in rod detachably mounted on the support base. The support base includes a pair of first crossbars and second crossbars. The two ends of the first crossbars are connected to the two second crossbars by connectors and form a frame. The support base can be folded up by folding the two first crossbars. The first crossbar includes two hinged folding rods, the outer ends of which are hinged to the connecting parts of the supporting base frame; A locking sleeve is slidably provided on the first crossbar. By sliding the locking sleeve to cover the hinge joint of the two folding rods, the support base can be locked to the unfolded state. Sliding the locking sleeve to disengage it from the joint of the two folding rods allows the first crossbar to be folded to close the support base.

2. A folding chair according to claim 1, characterized in that, Two limiting protrusions are provided on the outer wall of a single first crossbar. One limiting protrusion is located near the joint of the two folding bars, and the other limiting protrusion is located near the second crossbar.

3. A folding chair according to claim 1, characterized in that, One end of the folding rod is provided with an opening slot, and the first crossbar also includes an intermediate connecting plate for connecting the two folding rods. The end of the intermediate connecting plate is hinged in the opening slot. When the first crossbar is unfolded, the end faces of the two folding rods abut against each other, and the intermediate connecting plate is completely placed in the opening slot.

4. A folding chair according to claim 1, characterized in that, The locking sleeve has a double-layer structure, with an inner plastic sleeve and an outer metal sleeve.

5. A folding chair according to claim 1, characterized in that, The locking sleeve is also equipped with a self-locking mechanism. When the locking sleeve locks the first crossbar, the self-locking mechanism can automatically lock the locking sleeve onto the first crossbar to keep the first crossbar in an extended state. The locking sleeve can be unlocked by manually operating the self-locking mechanism.

6. A folding chair according to claim 5, characterized in that, The folding rod is provided with a locking hole. The self-locking mechanism includes an elastic element, a locking pin, and an unlocking element. One end of the elastic element is fixed inside the locking sleeve, and the other end is fixed with a locking pin. The unlocking element slides on the locking sleeve. The self-locking mechanism locks the position of the locking sleeve by inserting the locking pin into the locking hole. Sliding the unlocking element can drive the locking pin to disengage from the locking hole, thereby completing the unlocking.

7. A folding chair according to claim 1, characterized in that, The supporting base also includes multiple connectors, with the two ends of the second crossbar being horizontally inserted into the two connectors respectively, and the two ends of the first crossbar being hinged to the two connectors respectively.

8. A folding chair according to claim 7, characterized in that, The connector includes an upper connector and a lower connector, and the upper connector and the lower connector are respectively inserted into the top and bottom of the connector.

9. A folding chair according to claim 8, characterized in that, The upper insertion rod is inserted diagonally downward into the connector, and the lower insertion rod is inserted diagonally upward into the connector. Both the upper and lower insertion rods extend outward from the support base, and the bottom of the lower insertion rod is fixed with a support foot.

10. A folding chair according to claim 1, characterized in that, A chair seat is provided on the top of the support frame.

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