Folding chair safe to use

Abstract

The utility model discloses a safe-to-use folding chair which comprises a seat plate and supporting frames symmetrically arranged on the left side and the right side of the seat plate, each supporting frame comprises a front leg and a rear leg, each rear leg comprises a rear leg pipe and a telescopic pipe movably inserted into the rear leg pipe, the rear leg pipes and the front legs are hinged to the seat plate, and the telescopic pipes are hinged to the front legs. When the rear legs extend, the folding chair is in a folded state, when the rear legs retract, the folding chair is in an unfolded state, the supporting frame further comprises a locking piece which is movably arranged on the rear leg pipes, the front legs or the joints of the front legs and the telescopic pipes, the locking piece prevents the telescopic pipes from stretching out at the locking position, the locking piece is released, and the telescopic pipes extend freely; when the locking piece is arranged on the rear leg pipe, the locking piece is detachably connected with the telescopic pipe at the locking position of the locking piece, otherwise, the locking piece is detachably connected with the rear leg pipe at the locking position of the locking piece. When the folding chair is used, the locking piece can prevent the extension of the telescopic pipe at the locking position, so that the folding chair can be locked in an open state, the folding chair is prevented from being folded accidentally in the use process, and the use safety is improved.

Description

Technical Field

[0001] The present invention belongs to the field of furniture, and in particular relates to a folding chair that is safe to use. Background Art

[0002] The folding chair comprises hinged front legs, rear legs and a seat plate. The front legs and rear legs can be rotated relative to each other to drive the folding chair to be opened and folded at will, and the chair is easy to store and use.

[0003] Traditional folding chairs limit the degree of opening of the folding chair by setting a stop structure in the rear leg tube, but do not lock the open state, which causes the traditional folding chair to fold unexpectedly when in the open state, and the safety of users, especially children, needs to be improved. Utility Model Content

[0004] The purpose of the present application is to overcome the defects of the prior art and provide a folding chair that is safe to use.

[0005] The technical solution of this application is as follows:

[0006] A folding chair that is safe to use, comprising a seat plate and a support frame symmetrically arranged on the left and right sides of the seat plate, the support frame comprising a front leg and a rear leg, the rear leg comprising a rear leg tube and a telescopic tube movably plugged into the rear leg tube, the rear leg tube and the front leg are respectively hinged to the seat plate, the telescopic tube is hinged to the front leg, the folding chair is in a folded state when the rear leg is extended, and in an open state when the rear leg is retracted, the support frame further comprises a locking piece movably arranged on the rear leg tube, the front leg or at the connection between the front leg and the telescopic tube, which prevents the telescopic tube from extending in a locked position, and the telescopic tube is freely extended when the locking piece is released;

[0007] Wherein, when the locking member is arranged on the rear leg tube, the locking member is detachably connected to the telescopic tube in its locking position;

[0008] When the locking piece is arranged on the front leg or the front leg and the telescopic tube, the locking piece is detachably connected to the rear leg tube at its locking position.

[0009] In some possible implementations, the folding chair further includes a rotating arm, one end of which is pivotally connected to the telescopic tube, the front leg, or the connection between the telescopic tube and the front leg, the other end of which is a free end, a locking member is disposed at the free end, the locking member is a clamping member, and a wall of the rear leg tube is provided with a clamping member that cooperates with the clamping member to clamp the clamping member;

[0010] When the rear legs are retracted, the clamping sub-piece is clamped with the clamping female piece at its locking position, and the folding chair is locked in the open state.

[0011] In some possible implementations, the rotating arm extends from one end away from the clamping member to form a handle;

[0012] The folding chair also includes an elastic member, which is a torsion spring. The spring body of the torsion spring is sleeved on one end of the pivoting arm. One torsion arm of the torsion spring is fixedly arranged at the connection between the telescopic tube, the front leg or the telescopic tube and the front leg. The other torsion arm of the torsion spring abuts against the clamping member.

[0013] When the folding chair is in the folded state, the torsion spring is in a free state.

[0014] In some possible implementations, the front leg is hinged to the telescopic tube via a hinge, and the rotating arm is pivotally connected to the connection between the telescopic tube and the front leg.

[0015] In some possible implementations, the locking member is a bayonet, the rear leg tube is provided with a first bayonet hole, the telescopic tube is provided with a second bayonet hole, and the bayonet is movably arranged in the axial direction of the first bayonet hole;

[0016] When the rear legs are retracted, the first latch hole overlaps with the second latch hole, and the latch pin is engaged with the first latch hole and the second latch hole at the same time in its locking position, so that the folding chair is locked in the open state.

[0017] In some possible implementations, the bottom end of the telescopic tube has a guiding slope that gradually moves away from the central axis of the telescopic tube from bottom to top.

[0018] In some possible implementations, the folding chair further includes a rotating arm and an elastic member, one end of the rotating arm is pivotally connected to the rear leg tube, the other end of the rotating arm is a free end, and the bayonet is hinged to the free end;

[0019] The opposite ends of the elastic member are respectively in contact with the rotating arm and the rear leg tube. When the bayonet is in the locking position, the elastic member is in a free state.

[0020] In some possible implementations, one end of the rotating arm away from the bayonet extends to form a handle, the elastic member abuts between the handle and the rear leg tube, and the elastic member is a compression spring.

[0021] In some possible implementations, the rotating arm is hinged to the rear leg tube, and the outer wall of the rear leg tube is provided with a handle limit groove corresponding to the position of the handle. When the handle is engaged with the handle limit groove, the engaging component is at its farthest position from the rear leg tube or the telescopic tube.

[0022] In some possible implementations, the rear leg tube further includes a tube wall fixedly inserted into the rear leg tube, and the length of the fixing rivet entering the rear leg tube is greater than the distance between the inner wall of the rear leg tube and the outer wall of the telescopic tube;

[0023] When the rear legs are retracted, the bottom of the telescopic tube abuts against the fixing rivet.

[0024] The present application has at least the following beneficial effects: the locking member can prevent the extension of the telescopic tube in its locking position, so that the folding chair can be locked in an open state, preventing the folding chair from accidentally folding during use, thereby improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of the folding chair provided in Example 1 in an open state;

[0026] Figure 2 A schematic diagram of the structure of the folding chair provided in Example 1 in a folded state;

[0027] Figure 3 A left side view of the folding chair provided in Example 1 in an opened state, wherein the locking member is in a locked position at this time;

[0028] Figure 4 for Figure 3 Enlarged view of middle B;

[0029] Figure 5 for Figure 4 A cross-sectional view of

[0030] Figure 6 A left side view of the folding chair provided in Example 1 in an opened state, wherein the locking member is released at this time;

[0031] Figure 7 for Figure 6 Enlarged view of middle C;

[0032] Figure 8 for Figure 7 A cross-sectional view of

[0033] Fig. 9 for Figure 2 A magnified view of middle;

[0034] Fig.10 for Fig. 9 A cross-sectional view of

[0035] Fig.11 A schematic diagram of the structure of the folding chair provided in Example 2 when it is in an open state;

[0036] Fig.12 A schematic diagram of the structure of the folding chair provided in Example 2 in a folded state;

[0037] Fig.13 for Fig.12 a right side view of the structure shown;

[0038] Fig.14 for Fig.12 Sectional view of D in the middle;

[0039] Fig.15 A schematic diagram of the structure of the folding chair provided in Example 2 during the opening process, wherein the guiding inclined surface is in contact with the latch at this time;

[0040] Fig.16 for Fig.15 a right side view of the structure shown;

[0041] Fig.17 for Fig.15 Sectional view of E;

[0042] Fig.18 A schematic diagram of the structure of the folding chair provided in Example 2 when it is in an open state;

[0043] Fig.19 for Fig.18 a right side view of the structure shown;

[0044] Fig. 20 for Fig.18 Sectional view of F in the middle;

[0045] Fig.21 for Fig. 20 Schematic diagram of the locking member being released.

[0046] The reference numerals in the figure are: 1-seat plate; 2-front leg; 21-hinge; 3-rear leg; 31-rear leg tube; 311-handle limit groove; 312-fixing rivet; 313-first clamping hole; 32-telescopic tube; 321-guide slope; 322-second clamping hole; 33-clamping mother part; 41-rotating arm; 411-handle; 42-clamping sub-part; 43-pin; 43-handle; 5-torsion spring; 51-spring body; 52-torsion arm; 6-compression spring. DETAILED DESCRIPTION

[0047] The technical solution of the present application is further illustrated and described below through specific implementation methods. The "contraction" of the rear legs mentioned in the present application refers to the state where the plug-in length of the rear leg tube and the telescopic tube is the largest and the total length of the rear legs is the smallest, and vice versa, "extension" refers to the state where the plug-in length of the rear leg tube and the telescopic tube is the smallest. Correspondingly, when the rear legs are "contracted", the angle between the front legs and the rear legs is the largest, and the folding chair is in the "open" state at this time, and when the rear legs are "extended", the angle between the front legs and the rear legs is the smallest, and they are almost parallel, and the folding chair is in the "folded" state at this time.

[0048] Embodiment 1

[0049] like Figure 1 and Figure 2As shown, this embodiment provides a folding chair with a locking device, including a seat plate 1 and a support frame symmetrically arranged on the left and right sides of the seat plate 1, the support frame includes a front leg 2 and a rear leg 3, the rear leg 3 includes a rear leg tube 31 and a telescopic tube 32 movably inserted into the rear leg tube 31, the rear leg tube 31 and the front leg 2 are respectively hinged to the seat plate 1, the front leg 2 is provided with a hinge 21, the telescopic tube 32 is hinged to the hinge 21 of the front leg 2, the folding chair is in a folded state when the rear leg 3 is extended, and the folding chair is in an open state when the rear leg 3 is retracted.

[0050] See also Figure 3 and Figure 4 The support frame 2 is also provided with a locking piece. In the present embodiment, the folding chair further comprises a rotating arm 41, the locking piece is a snap-fitting sub-piece 42, one end of the rotating arm 41, the telescopic tube 32 and the hinge 21 are hinged together, the snap-fitting sub-piece 42 is arranged at the free end of the rotating arm 41, and a snap-fitting mother piece 34 is arranged at the corresponding position of the rear leg tube 31, and the snap-fitting mother piece 34 is a slot. When the rear leg 3 is retracted, the rotating arm 41 reaches the locking position through the cooperation of the snap-fitting sub-piece 42 and the snap-fitting mother piece 34.

[0051] One end of the rotating arm 41 away from the locking member extends to form a handle 411. By pressing the handle 411, the rotating arm can be rotated relative to the rear leg, so that the clamping sub-member 42 and the clamping female member 34 can be engaged or released.

[0052] In addition, if Figure 5 As shown, the folding chair further comprises an elastic member, which is a torsion spring 5. Specifically, the torsion spring 5 comprises a spring body 51 and two torsion arms 52 at both ends of the spring body 51, wherein the spring body 51 is sleeved on the hinge point 411, one torsion arm 52 is fixed on the hinge 21 of the front leg 2, and the other torsion arm 52 abuts against the handle 411.

[0053] The structure of the folding chair will be further described below in conjunction with the state changes of the folding chair.

[0054] When the folding chair is in the open position, Figure 3-Figure 5 As shown, the telescopic tube 32 and the rear leg tube 31 are in a retracted state, at which time the insertion length of the two is the largest and the total length of the rear leg 3 is the smallest. The clamping sub-component 42 of the rotating arm 41 is clamped with the clamping mother component 34 of the rear leg tube 31, and the two torsion arms 52 of the torsion spring 5 push against each other and generate an elastic force moving away from each other. The elastic force is transmitted through the handle 411 and the hinge point 411 of the rotating arm 41, so that one end of the rotating arm 41 with the clamping sub-component 42 receives pressure in the direction of approaching the clamping mother component 34, so that the clamping mother component 34 and the clamping sub-component 42 are more firmly clamped, and the folding chair is locked in the folded state.

[0055] Press the handle 411 to release the clamping connection between the clamping sub-component 42 and the clamping female component 34. Figure 6-Figure 8The locking member is released, and then the rear leg 3 rotates toward the front leg 2, and the telescopic tube 32 slides relative to the rear leg tube 31 until the position reaches the position shown in FIG. Figure 2 , Fig. 9 and Fig.10 At this time, from Fig.10 It can be seen that the torsion spring 5 is in a state of no deformation, so the folding state is relatively stable, and an external force needs to be applied to the folding chair to open it.

[0056] Embodiment 2

[0057] This embodiment provides a folding chair with a locking member, such as Fig.11 As shown, the folding chair includes a seat plate 1 and a support frame 2 symmetrically arranged on the left and right sides of the seat plate 1, the support frame 2 includes a front leg 2 and a rear leg 3, the rear leg 3 includes a rear leg tube 31 and a telescopic tube 32 movably plugged into the rear leg tube 31, the rear leg tube 31 and the front leg 2 are respectively hinged to the seat plate 1, the front leg 2 is sleeved with a hinge 21, the telescopic tube 32 is hinged to the hinge 21 of the front leg 2, and when the rear leg 3 is extended, the folding chair is as shown Fig.12 In the folded state shown, the folding chair is as follows when the rear legs 3 are retracted. Fig.11 and Fig.18 Shown in open state.

[0058] The support frame 2 is also provided with a locking member, such as Fig.14 As shown, the locking member is a bayonet 43, a first bayonet hole 313 is provided at a corresponding position of the rear leg tube 31, a second bayonet hole 322 is provided at a corresponding position of the telescopic tube 32, and the bayonet 43 is movably arranged in the axial direction of the first bayonet hole. Further, the folding chair includes a rotating arm 41, one end of the rotating arm 41 is pivotally connected to the rear leg tube, and the other end of the rotating arm 41 is a free end, which is hinged to the bayonet 43.

[0059] The rear leg tube 31 further includes a fixing rivet 312 , which is fixedly inserted into the tube wall of the rear leg tube 31 and penetrates the rear leg tube 31 . When the folding chair is in the open state, the bottom end of the telescopic tube 32 abuts against the fixing rivet 312 .

[0060] The other end of the rotating arm 41 relative to the latch 43 forms a handle 411, and the rear leg tube 31 is provided with a handle limit groove 311 corresponding to the position of the handle 411. A compression spring 6 is provided near the handle limit groove 311, and one end of the compression spring 6 abuts against the rear leg tube 31, and the other end of the compression spring 6 abuts against the handle 411. When the handle 411 is away from the rear leg tube 31, the compression spring 6 is at its original length, and when the handle 411 is engaged with the handle limit groove 311, the compression spring 6 is in the original length. Fig.21 The compression state is shown.

[0061] The bottom end of the telescopic tube 32 has a guiding slope 321 which gradually moves away from the central axis of the telescopic tube 32 from bottom to top. Fig.17 As shown, the guiding inclined surface 321 contacts the latch 43 , driving the latch 43 to rotate relatively in a direction away from the rear leg tube 31 .

[0062] The structure of the folding chair will be further described below in conjunction with the state changes of the folding chair.

[0063] refer to Figure 12-14 When the folding chair is in the folded state, the latch 43 is engaged with the rear leg tube 31, and the handle 411 is away from the handle limit groove 311. The rear leg 3 of the folding chair is rotated away from the front leg 2, and the plug-in length of the telescopic tube 32 and the rear leg tube 31 increases until it reaches the retracted state. Figure 15-17 As shown, the telescopic tube 32 first contacts the bayonet 43, and the bayonet 43 drives the end of the rotating arm 41 hinged with the bayonet 43 to rotate away from the rear leg tube 31 under the pressure of the guide slope 321, but the bayonet 43 is always in contact with the opening of the rear leg tube 31. Figure 18-Figure 20 As shown, when the rear leg 3 reaches the retracted state, the bottom end of the telescopic tube 32 abuts against the fixing rivet 312, the opening of the rear leg tube 31 coincides with the opening of the telescopic tube 32, and the bayonet 43 passes through the opening of the rear leg tube 31 and the opening of the telescopic tube 32 at the same time, so that the relative positions of the rear leg tube 31 and the telescopic tube 32 are fixed, and the folding chair is locked in the open state.

[0064] like Fig.21 As shown, if the locking member is to be released, the handle 411 only needs to be pressed to make the handle 411 enter the handle limiting groove 311 and the latch 43 leave the opening of the telescopic tube 32 .

[0065] The above are only preferred embodiments of the present application, and therefore cannot be used to limit the scope of implementation of the present application. That is, equivalent changes and modifications made according to the patent scope of the present application and the contents of the specification should still fall within the scope covered by the present application.

Claims

1. A folding chair that is safe to use, comprising a seat plate and a support frame symmetrically arranged on the left and right sides of the seat plate, the support frame comprising a front leg and a rear leg, the rear leg comprising a rear leg tube and a telescopic tube movably plugged into the rear leg tube, the rear leg tube and the front leg are respectively hinged to the seat plate, the telescopic tube is hinged to the front leg, the folding chair is in a folded state when the rear leg is extended, and in an open state when the rear leg is retracted, characterized in that: The support frame further comprises a locking member movably arranged on the rear leg tube, the front leg or the connection between the front leg and the telescopic tube, which prevents the telescopic tube from extending in the locking position, and releases the locking member so that the telescopic tube can extend freely; Wherein, when the locking member is arranged on the rear leg tube, the locking member is detachably connected to the telescopic tube in its locking position; When the locking member is disposed on the front leg or the front leg and the telescopic tube, the locking member is detachably connected to the rear leg tube at its locking position.

2. The folding chair according to claim 1, characterized in that: It also includes a rotating arm, one end of which is pivotally connected to the telescopic tube, the front leg, or the connection between the telescopic tube and the front leg, and the other end of the rotating arm is a free end, the locking member is arranged at the free end, the locking member is a clamping member, and the tube wall of the rear leg tube is provided with a clamping female member that cooperates with the clamping member to clamp; When the rear legs are retracted, the clamping sub-part is clamped with the clamping female part at its locking position, and the folding chair is locked in the open state.

3. The folding chair according to claim 2, characterized in that: One end of the rotating arm away from the clamping sub-component extends to form a handle; The folding chair further comprises an elastic member, which is a torsion spring, wherein a spring body of the torsion spring is sleeved on one end of the pivoting arm, a torsion arm of the torsion spring is fixedly arranged on the telescopic tube, the front leg or the connection between the telescopic tube and the front leg, and another torsion arm of the torsion spring abuts against the clamping sub-member; When the folding chair is in a folded state, the torsion spring is in a free state.

4. The folding chair according to claim 3, characterized in that: The front leg is hinged to the telescopic tube through a hinge, and the rotating arm is pivotally connected to the connection between the telescopic tube and the front leg.

5. The folding chair according to claim 2, characterized in that: The locking member is a bayonet pin, the rear leg tube is provided with a first bayonet hole, the telescopic tube is provided with a second bayonet hole, and the bayonet pin is movably arranged in the axial direction of the first bayonet hole; When the rear legs are retracted, the first latch hole overlaps with the second latch hole, and the latch pin is engaged with the first latch hole and the second latch hole at the same time in its locking position, so that the folding chair is locked in the open state.

6. The folding chair according to claim 5, characterized in that: The bottom end of the telescopic tube has a guiding slope which gradually moves away from the central axis of the telescopic tube from bottom to top.

7. The folding chair according to claim 5 or 6, characterized in that: It also includes a rotating arm and an elastic member, one end of the rotating arm is pivotally connected to the rear leg tube, the other end of the rotating arm is a free end, and the bayonet is hinged to the free end; The opposite ends of the elastic member are respectively in contact with the rotating arm and the rear leg tube. When the bayonet is in the locking position, the elastic member is in a free state.

8. The folding chair according to claim 7, characterized in that: One end of the rotating arm away from the bayonet extends to form a handle, and the elastic member abuts between the handle and the rear leg tube, and the elastic member is a compression spring.

9. The folding chair according to claim 8, characterized in that: The rotating arm is hinged to the rear leg tube, and the outer wall of the rear leg tube is provided with a handle limit groove corresponding to the position of the handle. When the handle is engaged with the handle limit groove, the engaging sub-component is at its farthest position from the rear leg tube or the telescopic tube.

10. The folding chair according to claim 1, characterized in that: The rear leg tube further comprises a fixing rivet, which is fixedly inserted into the tube wall of the rear leg tube, and the length of the fixing rivet entering the rear leg tube is greater than the distance between the inner wall of the rear leg tube and the outer wall of the telescopic tube; When the rear legs are retracted, the bottom of the telescopic tube abuts against the fixing rivet.

Images