Framework for folding chair and folding chair

Abstract

The utility model provides a skeleton for a folding chair, which comprises a first mounting mechanism and a second mounting mechanism arranged above the first mounting mechanism, the first mounting mechanism comprises a first mounting main body and a stay tube arranged on the first mounting main body, and the second mounting mechanism comprises a second mounting main body and a second mounting main body arranged on the second mounting main body. The second mounting mechanism comprises a second mounting main body matched with the first mounting main body and a foot tube arranged on the second mounting main body; wherein a track used for limiting the foot tube is arranged on the first mounting main body, the first mounting main body and the second mounting main body are configured to generate opposite or relative movement under the action of external force, and the foot tube is expanded or contracted under the limiting action of the track.

Description

Technical Field

[0001] The utility model relates to the technical field of folding seats, in particular to a frame for a folding chair and a folding chair. Background Art

[0002] Folding chairs are easy to fold and carry. They are not only suitable for use outdoors and in temporary places, but are also essential emergency items for homes.

[0003] At present, traditional folding chairs are usually composed of a folding bracket and a supporting cloth, and the folding bracket is also made up of multiple support rods. Therefore, there are the following problems during use: First, the folding bracket of a traditional folding chair will shrink inward after being pulled, so the connection relationship of the folding bracket still needs to be readjusted after changing the position, which will seriously affect the user experience; second, the traditional folding chair is large in size and relatively long in length after folding, so it is not conducive to carrying and storing. Especially when you need to carry a lot of items when playing outdoors, the large folding chair will not only bring a poor user experience, but also cause more trouble to the user. Third, because the opening procedure of traditional folding chairs is complicated and not smooth enough, the opening process will be time-consuming and inconvenient.

[0004] Therefore, it is desirable in the art to provide a frame for a folding chair and a folding chair to solve the above technical problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a frame for a folding chair, which can control the relative movement of a first mounting body and a second mounting body, and at the same time, can control the conversion of the leg tube between a closed state and an open state under the joint action of a torsion spring and a track. Therefore, the device can have the ability to be quickly opened and stored, further improving the user experience.

[0006] According to a first aspect of the present invention, a frame for a folding chair is provided, comprising a first mounting mechanism and a second mounting mechanism disposed above the first mounting mechanism.

[0007] The first mounting mechanism includes a first mounting body and a support pipe provided on the first mounting body.

[0008] The second mounting mechanism includes a second mounting body adapted to fit the first mounting body, and a leg provided on the second mounting body;

[0009] Wherein, a track for limiting the position of the leg tube is provided on the first installation body.

[0010] The first installation body and the second installation body are configured to move toward or relative to each other under the action of an external force, and the leg tubes are expanded or contracted under the limiting action of the track.

[0011] In one embodiment, a slot is provided in the second installation body, and a torsion spring adapted to fit the slot is provided in the leg tube.

[0012] In one embodiment, the support tubes and the leg tubes are alternately arranged along the circumference of the frame.

[0013] In one embodiment, the torsion spring is constructed as a bidirectional torsion spring, which includes a connecting portion configured in a spiral form, a first supporting portion arranged at a first end of the connecting portion and abutting against the inner wall of the leg tube, and a second supporting portion arranged at a second end of the connecting portion and used to form a locking with the slot.

[0014] In one embodiment, the support tube is hinged to the first installation body through a fixing cavity.

[0015] In one embodiment, the leg tube is hinged to the second mounting body through a mounting cavity, and the clamping groove is formed at an upper end surface of the mounting cavity.

[0016] In one embodiment, a lock cavity is provided in the first installation body, and a lock tongue arranged longitudinally and used to be embedded in the lock cavity is provided in the second installation body, and the installation cavities are arranged at intervals around the circumference of the lock tongue.

[0017] In one embodiment, the support tube includes at least two adjacently arranged seat tube portions and at least two adjacently arranged back tube portions, and the length of the back tube portion is greater than the length of the seat tube portion.

[0018] In one embodiment, the seat tube portion and the back tube portion are both composed of a plurality of interconnected telescopic tubes, and adjacent telescopic tubes are connected by lockers.

[0019] According to a second aspect of the present invention, a folding chair is provided, comprising a frame as described above, and a chair cover arranged on the frame, wherein the four corners of the chair cover are fixedly connected to the seat tube portion and the back tube portion respectively.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] First, the present invention can control the relative movement of the first mounting body and the second mounting body, and at the same time, under the joint action of the torsion spring and the track, can control the conversion of the leg tube between the closed state and the open state. Therefore, the device can have the ability to open and store quickly, further improving the user experience.

[0022] In other words, when the first mounting body and the second mounting body are in a separated state, the leg tubes and the support tubes in the present invention can both retract inward to effectively reduce the overall size of the folding chair, thereby facilitating carrying and storage during outdoor activities; when the first mounting body and the second mounting body are in a merged state and the torsion spring and the card slot are locked, the leg tubes and the support tubes in the present invention can both open outward, thereby cooperating with the chair cover to provide the user with a sitting environment and space, further bringing a better experience to the user.

[0023] Secondly, when the device is in the open position, the legs are opened outward by the torsion springs, and the upper end surfaces of the legs abut against the guide slopes of the track to provide a good position limit. This ensures that the legs are always in the open position, so the overall structure of the folding chair does not change during the position change process, and the folding chair can continue to be used after the position change, thus avoiding the need to readjust the connection relationship of the folding bracket due to position change, further improving the user experience.

[0024] Third, compared with the prior art, the present invention effectively ensures the force balance and stability of the folding chair by arranging the support tubes and the leg tubes in an alternating manner along the circumferential direction, further ensuring the safety of the user when using it. In addition, such a layout can effectively prevent the seat from leaning back or tipping over when the user stands up or sits down. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be described in detail below with reference to the accompanying drawings, in which:

[0026] Figure 1 The structure of the frame for a folding chair according to the present invention is schematically shown;

[0027] Figure 1a for Figure 1 A partial view showing the structure of the first mounting mechanism;

[0028] Figure 1b for Figure 1 A partial view showing the structure of the second mounting mechanism;

[0029] Figure 2 It is a front view of a frame for a folding chair according to the present utility model;

[0030] Figure 3 is a side view of a frame for a folding chair according to the present invention;

[0031] Figure 4 is a top view of a frame for a folding chair according to the present invention;

[0032] Figure 4a for Figure 4 Partial cross-sectional view at AA in the middle;

[0033] Figure 4b for Figure 4 Partial cross-sectional view at the middle BB;

[0034] Figure 4c for Figure 4a A partial enlarged view of

[0035] Figure 5 Schematically shows the closed state of the frame for the folding chair according to the present invention;

[0036] Figure 6 The schematic shows the first stage of the skeleton opening process;

[0037] Figure 7 The schematic shows the state of the second stage of the skeleton opening process;

[0038] Figure 8 The third stage of the skeleton opening process is shown schematically;

[0039] Figure 9 The fourth stage of the skeleton opening process is shown schematically;

[0040] Figure 10 The fifth stage of the skeleton opening process is shown schematically.

[0041] In the drawings, like parts are given like reference numerals, but the drawings are not necessarily drawn to scale. DETAILED DESCRIPTION

[0042] To make the technical solutions and advantages of the present invention more clearly understood, exemplary embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, and are not exhaustive. Furthermore, the embodiments and features of the embodiments of the present invention may be combined with each other unless there is a conflict.

[0043] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features.

[0044] In the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components.

[0045] For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0046] The present invention will be further described below with reference to the accompanying drawings.

[0047] Figure 1 The structure of a frame 100 for a folding chair according to the present invention is schematically shown.

[0048] Figure 1a for Figure 1 A partial view showing the structure of the first mounting mechanism.

[0049] Figure 1b for Figure 1 A partial view showing the structure of the second mounting mechanism.

[0050] Figure 4a for Figure 4 Partial cross-sectional view at AA in the middle.

[0051] Figure 4c This is a partial enlarged view of 4a.

[0052] Figure 5 The figure schematically shows the closed state of the frame 100 for the folding chair according to the present invention.

[0053] like Figure 1 、 Figure 1a 、 Figure 1b 、 Figure 4a and 5 As shown, according to a first aspect of the present invention, a frame 100 for a folding chair is provided, which primarily includes a first mounting mechanism and a second mounting mechanism. Preferably, the first mounting mechanism is located above the second mounting mechanism, and when the frame 100 is opened, the first mounting mechanism and the second mounting mechanism can move toward each other until they merge together. Conversely, when the frame 100 is closed, the first mounting mechanism and the second mounting mechanism can separate and move away from each other until the leg tubes 22 (described below) are fully retracted.

[0054] Figure 4 is a top view of a frame 100 for a folding chair according to the present invention; Figure 4b for Figure 4 Partial cross-sectional view at the middle BB;

[0055] In one embodiment, Figures 4 to 4c As shown, the first mounting mechanism includes a first mounting body 11. Preferably, a track 12 is provided on the first mounting body 11. Therefore, during the unfolding of the frame 100, the track 12 effectively restricts the movement path of the leg tubes 22. In the present invention, the track 12 is configured as an inclined track and is provided in multiple locations, spaced apart on the first mounting body 11.

[0056] In this utility model, if Figures 4-4b As shown, a guide slope 121 is formed on the inner wall of the track 12 for abutting the upper surface of the leg tube 22. Preferably, when the frame 100 is in the open state, the upper end surface of the leg tube 22 always abuts the guide slope 121 of the track 12. Therefore, this method ensures that the leg tube 22 has good firmness and stability during use, further improving the user experience.

[0057] In one embodiment, Figure 1 and 4 As shown in Figures 4a to 4c, the second mounting mechanism includes a second mounting body 21 and a leg 22 disposed on the second mounting body 21. Preferably, the leg 22 is hinged to the second mounting body 21 through the mounting cavity 42, and the free end of the leg 22 can extend through the rail 12 and form a sliding connection therewith.

[0058] Therefore, when the frame 100 is opened and closed, the leg tube 22 can rotate around the second mounting body 21 to complete the outward opening or inward contraction action. In other words, the leg tube 22 can realize the conversion between the open state and the closed state under the joint action of the torsion spring 30 and the track 12, the content of which is introduced below.

[0059] In this utility model, if Figures 4 to 4c As shown, a lock cavity 111 is provided in the first installation body 11 , and a lock tongue 211 arranged longitudinally and used to be embedded in the lock cavity 111 is provided in the second installation body 21 . Therefore, the first installation body 11 matches the second installation body 21 .

[0060] Explanation of the above-mentioned "matching": When the skeleton 100 is in the open state, the lock tongue 211 of the second installation body 21 can be completely embedded in the lock cavity 111 of the first installation body 11. At this time, the upper end surface of the first installation body 11 and the lower end surface of the second installation body 21 will be in a sealed connection state, so as to promote the first installation body 11 and the second installation body 21 to form a matching connection.

[0061] According to the utility model, if Figures 4 to 4cAs shown, the second mounting mechanism includes a slot 23 disposed within the second mounting body 21. Preferably, multiple mounting cavities 42 are spaced apart circumferentially around the locking tongue 211, with the slot 23 formed at the upper end surface of the mounting cavity 42. Furthermore, a torsion spring 30 is disposed within the leg 22 to engage with the slot 23. In the present invention, the torsion spring 30 can lock with the slot 23, thereby ensuring the stability and secure connection between the first mounting body 11 and the second mounting body 21.

[0062] In the present invention, when the torsion spring 30 and the card slot 23 are in a locked state, the leg tube 22 will be in an open state under the action of the torsion spring 30, and at the same time, the leg tube 22 will be limited by the action of the track 12, thereby ensuring that the leg tube 22 can complete the outward opening action under the joint action of the torsion spring 30 and the track 12 during the downward movement of the first installation body 11, so as to further improve the firmness and stability of the frame 100.

[0063] Preferably, since the leg tube 22 can always be in the open state when the torsion spring 30 and the slot 23 are in the locked state, the overall structure of the frame 100 (i.e., the open state of the leg tube 22) will not change during the position change process, and the frame 100 can still continue to be used after the position change, thereby avoiding the need to readjust the connection relationship of the folding bracket due to the change of position, further improving the user experience.

[0064] In the present invention, the second mounting body 21 is configured to be able to move downward under the action of an external force (such as an axial thrust applied by a user), and the leg tube 22 can gradually change from a closed state to an open state along the movement path given by the track 12 under the action of the torsion spring 30, until the torsion spring 30 is embedded in the card slot 23 to form a locked state. At this time, the leg tube 22 will be fully stretched to be in an open state.

[0065] In a specific embodiment of the present invention, Figures 4a-4b As shown, the torsion spring 30 is a bidirectional torsion spring and includes a connecting portion 31 in a spiral form, a first supporting portion 32 disposed at a first end of the connecting portion 31, and a second supporting portion 33 disposed at a second end of the connecting portion 31. Preferably, the first supporting portion 32 always abuts against the inner wall of the leg tube 22, thereby exerting an outward force on the leg tube 22 to ensure smooth outward opening. The second supporting portion 33 can be inserted into the locking slot 23 to form a locking connection therewith, thereby ensuring the firmness and stability of the frame 100.

[0066] In the present invention, the first mounting body 11 is configured to release the locking state between the torsion spring 30 and the locking slot 23 under the action of an external force (e.g., an axial thrust applied by a user) and continue to move downward. During this process, the leg tube 22 will retract inwardly under the restraining action of the track 12 to be in a closed state.

[0067] According to the present invention, the first mounting mechanism also includes a fixing cavity 41 and a support tube hingedly connected to the first mounting body 11 via the fixing cavity 41 (the support tube includes a seat tube portion 13 and a back tube portion 14, both of which are connected to the fixing cavity 41, as described in detail below). Therefore, when the frame is opened, the support tube can be manually opened outward. Preferably, a stopper is provided within the fixing cavity 41 to limit the maximum movement path of the support tube, thereby ensuring its stability and securement during use.

[0068] Preferably, the fixing cavities 41 and the rails 12 are arranged alternately along the circumference of the frame 100. Since the support tubes are hinged to the first mounting body 11 via the fixing cavities 41, and the leg tubes 22 need to pass through the rails 12 and form a sliding connection therewith, it can be understood that the support tubes and leg tubes 22 in the present invention are arranged alternately along the circumference.

[0069] In the prior art, two support tubes are typically arranged symmetrically, i.e., two support tubes are provided between two adjacent leg tubes. Obviously, such a layout makes the chair prone to reclining or tipping over when the user stands up or sits down. However, by arranging the support tubes and leg tubes 22 in an alternating circumferential arrangement, the present application effectively ensures balanced force and stability of the folding chair, further guaranteeing user safety during use.

[0070] In other embodiments, three legs 22 may be provided, and adjacent legs 22 may be arranged at 120° angles to each other. This approach not only ensures the stress stability of the folding chair, but also reduces the overall weight of the folding chair while lowering production costs, further improving the portability of the device and providing a better user experience.

[0071] Figure 2 is a front view of a frame 100 for a folding chair according to the present invention; Figure 3 A side view of a frame 100 for a folding chair according to the utility model.

[0072] According to the utility model, if Figures 1 to 5 As shown, the support tube includes at least two adjacent seat tubes 13 and at least two adjacent back tubes 14. In order to meet user needs, the length of the back tube 14 is usually greater than the length of the seat tube 13, so that the folding chair can provide a sitting environment for the user.

[0073] In one embodiment, the seat tube portion 13 and the back tube portion 14 are typically composed of multiple interconnected telescopic tubes, with adjacent telescopic tubes connected by locks. In the present invention, the user can extend the corresponding telescopic tube and easily lock two adjacent telescopic tubes together using the locks at the corresponding positions, further improving the operability of the device.

[0074] In the present invention, the locker adopts a marble fixing method, that is, the two adjacent telescopic tubes are locked by popping out the marble. Preferably, the locker can also adopt other methods, that is, it can lock the two adjacent telescopic tubes.

[0075] In one embodiment, a pipe plug is provided at the free end of the seat tube portion 13 and the back tube portion 14. In the present invention, the pipe plug can play an effect of preventing hands from being cut and preventing chair fabric from being cut, thereby further improving the safety of the device.

[0076] In one embodiment, a foot pad 221 is provided at the bottom end of the leg tube 22. Preferably, the foot pad 221 is wrapped around the outside of the leg tube 22, thereby increasing its contact area with the ground and further improving the stability of the folding chair during use. In other embodiments, the foot pad can also be installed inside the leg tube 22.

[0077] Preferably, the second mounting mechanism further includes a stopper adapted for the support tube. Preferably, the stopper and the mounting cavity 42 are alternately arranged circumferentially on the second mounting body 21, and when the frame 100 is in the fully opened state, the stopper can be completely seated on the support tube to prevent it from rocking left or right, further improving the stability of the folding chair and the user experience.

[0078] According to a second aspect of the present invention, a folding chair is provided, comprising a frame 100 as described above, and a seat cover (not shown) disposed over the frame. Preferably, the four corners of the seat cover are fixedly connected to the seat tube portion 13 and the back tube portion 14 (e.g., by screws), thereby providing a better user experience.

[0079] In the present invention, the chair cover generally includes a seat and a backrest fixedly connected to each other. Preferably, the angle formed between the seat and the backrest is generally within the range of 90° to 110°, so that after the chair cover and the frame are assembled, the user can have a comfortable sitting experience.

[0080] According to a third aspect of the present invention, a method of use is provided, which utilizes the skeleton 100 as described above, including an opening step and a closing step.

[0081] The following combination Figures 6-10 Here are the steps to open the device:

[0082] First, open the seat tube portion 13 and the back tube portion 14 outwards;

[0083] Then, the second mounting body 21 is pushed downward by an external force (for example, an axial thrust applied by the user), and at the same time, the leg tube 22 gradually changes from a closed state to an open state along the movement path given by the track 12 under the action of the torsion spring 30, until the torsion spring 30 is embedded in the card slot 23 to form a locked state. At this time, the leg tube 22 will be fully stretched to put the frame 100 in an open state.

[0084] The following are the steps to shut down the device:

[0085] First, an external force (e.g., an axial thrust applied by a user) is applied to release the locking state between the torsion spring 30 and the slot 23, and the first mounting body 11 is pushed downward until the leg 22 is fully retracted under the restraining action of the track 12 to be in the closed state.

[0086] It is worth noting that the diagonal arrangement (i.e. Figure 4 The seat tube portion 13 and the back tube portion 14 in the MM or PP direction apply external force at the same time, thereby prompting the first installation body 11 to move downward, and under the action of the lever principle, the second installation body 21 is subjected to an upward force to overcome the force of the torsion spring 30 and move upward.

[0087] Then, the seat tube portion 13 and the back tube portion 14 are retracted inwardly to put the frame into a completely closed state.

[0088] Compared with the prior art, the advantages of the present invention are:

[0089] First, the present invention can control the relative movement of the first mounting body 11 and the second mounting body 21, and at the same time, under the joint action of the torsion spring 30 and the track 12, can control the conversion of the leg tube 22 between the closed state and the open state. Therefore, the device can have the ability to open and store quickly, further improving the user experience.

[0090] In other words, when the first mounting body 11 and the second mounting body 21 are in a separated state, the leg tubes 22 and the support tubes in the present invention can both retract inward to effectively reduce the overall size of the folding chair, thereby facilitating carrying and storage during outdoor activities; when the first mounting body 11 and the second mounting body 21 are in a merged state and the torsion spring 30 is locked with the card slot 23, the leg tubes 22 and the support tubes in the present invention can both open outward, thereby cooperating with the chair cover to provide the user with a sitting environment and space, further bringing a better experience to the user.

[0091] Secondly, when the device is in the open position, the leg tubes 22 are opened outward by the torsion springs 30, and the upper end surfaces of the leg tubes 22 abut against the guide slopes 121 of the track 12 to effectively limit the position. This ensures that the leg tubes 22 are always in the open position, so the overall structure of the folding chair does not change during the position change process, and the folding chair can continue to be used after the position change, thus avoiding the need to readjust the connection relationship of the folding bracket due to position change, further improving the user experience.

[0092] Third, compared with the prior art, the present invention effectively ensures the force balance and stability of the folding chair by arranging the support tubes and the leg tubes 22 in an alternating manner along the circumferential direction, further ensuring the safety of the user when using it, and adopting such a layout can effectively avoid the problem of the seat leaning back or tipping over when the user stands up or sits down.

[0093] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art may easily make changes or modifications within the scope disclosed herein, and such changes or modifications shall be encompassed within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A frame for a folding chair, characterized in that: It includes a first mounting mechanism and a second mounting mechanism arranged above the first mounting mechanism. The first mounting mechanism comprises a first mounting body (11) and a support pipe arranged on the first mounting body (11). The second mounting mechanism comprises a second mounting body (21) adapted to be matched with the first mounting body (11), and a leg (22) arranged on the second mounting body (21); Wherein, a track (12) for limiting the position of the leg tube (22) is provided on the first installation body (11). The first installation body (11) and the second installation body (21) are configured to generate a direction or relative movement under the action of an external force, the leg tube (22) is expanded or contracted under the limiting action of the track (12), a card slot (23) is provided in the second installation body (21), and a torsion spring (30) adapted to the card slot (23) is provided in the leg tube (22).

2. The frame for a folding chair according to claim 1, characterized in that: The torsion spring (30) is configured as a bidirectional torsion spring, comprising a connecting portion (31) configured in a spiral form, a first supporting portion (32) provided at a first end of the connecting portion (31) and abutting against an inner wall of the leg tube (22), and a second supporting portion (33) provided at a second end of the connecting portion (31) and used to form a locking relationship with the clamping slot (23).

3. The frame for a folding chair according to claim 2, characterized in that: The support tubes and the leg tubes (22) are alternately arranged along the circumference of the frame.

4. The frame for a folding chair according to any one of claims 1 to 3, characterized in that: The support tube is hinged to the first installation body (11) through a fixing cavity (41).

5. The frame for a folding chair according to any one of claims 1 to 3, characterized in that: The leg tube (22) is hinged to the second installation body (21) through the installation cavity (42), and the clamping groove (23) is formed at the upper end surface of the installation cavity (42).

6. The frame for a folding chair according to claim 5, characterized in that: A lock cavity (111) is provided in the first installation body (11), a lock tongue (211) arranged longitudinally and used to be embedded in the lock cavity (111) is provided in the second installation body (21), and the installation cavities (42) are arranged at intervals around the circumference of the lock tongue (211).

7. The frame for a folding chair according to any one of claims 1 to 3, characterized in that: The support tube comprises at least two adjacently arranged seat tube portions (13) and at least two adjacently arranged back tube portions (14), wherein the length of the back tube portion (14) is greater than the length of the seat tube portion (13).

8. The frame for a folding chair according to claim 7, characterized in that: The seat tube portion (13) and the back tube portion (14) are both composed of a plurality of telescopic tubes connected to each other, and adjacent telescopic tubes are connected via lockers.

9. A folding chair comprising a frame according to any one of claims 1 to 8, and a chair cover provided on the frame, wherein: The four corners of the chair cover are fixedly connected to the seat tube portion (13) and the back tube portion (14) respectively.

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