A new type of chair

Abstract

The present invention provides a new type of armchair, comprising a base, a backrest pivotally connected to the base at a first rotating shaft, and an armrest connected to the base, and also comprising an elastic component fixed to the armrest, wherein the backrest and the elastic component are pivotally connected via a second rotating shaft, and the elastic component is used to provide an elastic force when the backrest swings about the first rotating shaft. This new type of armchair is provided with an elastic component between the backrest and the armrest, so that the backrest can not only swing relative to the base, but also the elastic component can provide a certain elastic force when the backrest swings; when the user uses this new type of armchair, the elastic component controls the swing amplitude of the backrest according to the pressure exerted by the user's back on the backrest; when the user leans back, the elastic force of the elastic component can support the backrest to swing slowly backwards and provide a buffer; when the user stands up, the elastic force of the elastic component can reset the backrest, and the comfort of this new type of armchair is improved.

Description

Technical Field

[0001] The invention relates to the technical field of seating, in particular to a novel armchair. Background Art

[0002] A chair is a kind of seat frequently used in daily life, generally including a backrest, a seat and armrests. In pursuit of comfort, people will lean their backs on the backrest of the chair while sitting on it. In order to enhance this comfort, people hope that the backrest can swing within a certain range to accommodate different body weights and leaning postures. Some chairs in the prior art do not have the conditions for the backrest to swing, such as wooden chairs; some chairs, such as chairs made of metal or plastic, can use the elasticity of the material itself to make the backrest swing, but the swing amplitude of such chairs is very small and cannot achieve the effect of enhancing comfort. There are also some chairs whose bottoms have been improved to make them into rocking chairs, which do improve comfort, but because the form of the chair has been changed, it cannot meet the diverse needs of the market. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to enable the backrest of the chair to swing within a certain range and enhance the comfort of the seat, the present invention provides a new type of chair with an elastic component, which can enable the backrest to swing within a certain range and provide elastic force during the swinging.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a new type of armchair, including a base, a backrest pivotally connected to the base at a first rotating shaft, and an armrest connected to the base, and also includes an elastic component fixed to the armrest, the backrest and the elastic component are pivotally connected through a second rotating shaft, and the elastic component is used to provide elastic force when the backrest swings about the first rotating shaft.

[0005] Preferably, the elastic component comprises a connecting rod, a spring, a first sleeve and a first limiting member;

[0006] The first sleeve fixed on the armrest has a cavity with one end open and the other end closed, one end of the connecting rod is pivotally connected to the backrest through the second rotating shaft, the connecting rod and the backrest are both rotatably connected to the second rotating shaft, the other end of the connecting rod is fixedly connected to the first limiting member and inserted into the cavity of the first sleeve, the cavity of the first sleeve has a boss, the spring is sleeved on the connecting rod and is located between the boss and the first limiting member, when the first limiting member moves toward the opening, the spring is compressed by the boss and the first limiting member.

[0007] Preferably, the elastic component also includes a second limit member, which is arranged between the first limit member and the boss and slidingly cooperates with the connecting rod. The spring is located between the first limit member and the second limit member. When the first limit member moves toward the opening, the spring is compressed by the first limit member and the second limit member and the boss blocks the second limit member.

[0008] Specifically, the backrest includes a backrest rod, an end of the backrest rod is pivotally connected to the base through a first rotating shaft, and one end of the connecting rod is pivotally connected to the backrest rod through the second rotating shaft.

[0009] In another novel recliner, the elastic assembly includes a spring, a second sleeve and a connecting member;

[0010] The second sleeve fixed on the armrest has a cavity, the spring is arranged in the cavity of the second sleeve, the connecting piece is located at one end of the spring and can move in the cavity along the expansion and contraction direction of the spring; the connecting piece is pivotally connected to the backrest through the second rotating shaft, and the connecting piece is rotationally connected to the second rotating shaft; the second sleeve is provided with a first channel, the length direction of the first channel is parallel to the central axis of the spring and perpendicular to the second rotating shaft, and the first end of the second rotating shaft penetrates the connecting piece and the first channel and is rotationally connected to the backrest.

[0011] Preferably, the second sleeve is provided with a second channel which is mirror-symmetrical to the first channel, and the second end of the second rotating shaft penetrates the connecting member and the second channel.

[0012] Preferably, the outline of the first channel and / or the outline of the second channel is a closed curved surface.

[0013] Preferably, the handrail is provided with two mirror-symmetrical third channels, the two third channels correspond to the first channel and the second channel respectively, and the length direction of the third channel is parallel to the central axis of the spring and perpendicular to the second rotating axis;

[0014] Two ends of the second rotating shaft pass through the two third channels respectively.

[0015] Preferably, the contour of the third channel is a closed curved surface.

[0016] Specifically, the backrest includes a backrest rod, an end of the backrest rod is pivotally connected to the base via a first rotating shaft, and the connecting member is pivotally connected to the backrest rod via the second rotating shaft.

[0017] In another new type of armchair, the elastic component includes a connecting rod, a third limiter, a fourth limiter, a fifth limiter, a front spring and a rear spring, the third limiter is fixedly connected to the armrest, one end of the connecting rod is pivotally connected to the backrest through the second rotating shaft, the other end of the connecting rod passes through the third limiter and is fixedly connected to the fourth limiter, the third limiter is slidingly matched with the connecting rod, and the fifth limiter located between the third limiter and the fourth limiter is slidingly matched with the connecting rod; the front spring is sleeved on the connecting rod and is located between the fourth limiter and the fifth limiter, the rear spring is sleeved on the connecting rod and is located between the third limiter and the fifth limiter, and the stiffness coefficient of the rear spring is greater than the stiffness coefficient of the front spring; when the fourth limiter moves toward the third limiter, the front spring is compressed by the fourth limiter and the fifth limiter, and the rear spring is compressed by the fifth limiter and the third limiter.

[0018] Preferably, the armrest has a first adjustment portion, and the base includes a second adjustment portion connected to the first adjustment portion;

[0019] The first adjustment portion cooperates with the second adjustment portion to enable the armrest to move relative to the base and to be locked in a plurality of positions;

[0020] The backrest is linked with the armrest, and when the armrest is locked at different positions, the backrest rotates to a corresponding tilt angle.

[0021] Preferably, the second adjustment part is a locking pin, the first adjustment part has an adjustment cavity surrounded by a surface, the locking pin is inserted into the adjustment cavity, the adjustment cavity includes a fourth channel suitable for the movement of the locking pin and a plurality of recesses suitable for the locking pin to be embedded, and the surface forming the recess is suitable for locking the locking pin.

[0022] As a preference,

[0023] The elastic component further comprises a third sleeve and a key, the third sleeve fixed on the armrest has a cavity, one end of the cavity is open and the other end has a blocking member, the third sleeve has a limiting hole near the opening, and the third limiting member has a limiting groove;

[0024] One end of the connecting rod fixed with the fourth limiting member is inserted into the cavity of the third sleeve from the opening and stops at the blocking member, and the clamping key is inserted into the limiting hole and the limiting groove.

[0025] Preferably, the backrest comprises a backrest rod, the backrest rod is pivotally connected to the base via a first rotating shaft, and one end of the connecting rod is pivotally connected to the backrest rod via the second rotating shaft.

[0026] Preferably, it further includes a foot support portion, which includes a side support rod whose end is pivotally connected to the base, and the end of the backrest rod is connected to the side support rod through a linkage rod, and the two ends of the linkage rod are respectively pivotally connected to the side support rod and the backrest rod.

[0027] The beneficial effect of the present invention is that an elastic component is arranged between the backrest and the armrest of the new type of armchair, so that the backrest can not only swing relative to the base, but also the elastic component can provide a certain elastic force when the backrest swings; when the user uses the new type of armchair, the elastic component controls the swing amplitude of the backrest according to the pressure exerted by the user's back on the backrest; when the user leans back, the elastic force of the elastic component can support the backrest to swing slowly backward and provide cushioning; when the user stands up, the elastic force of the elastic component can restore the backrest, thereby improving the comfort of the new type of armchair. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1 It is a schematic diagram of the frame structure of Example 1 of a novel armchair.

[0030] Figure 2 It is a partial structural schematic diagram of embodiment 1 of a novel armchair.

[0031] Figure 3 It is a schematic diagram of the frame structure of Example 2 of a novel armchair.

[0032] Figure 4 It is a partial structural schematic diagram of embodiment 2 of a novel armchair.

[0033] Figure 5 It is a partial structural schematic diagram of embodiment 3 of a novel armchair.

[0034] Figure 6 It is a partial structural schematic diagram of embodiment 4 of a novel armchair.

[0035] Figure 7 The present invention is a schematic diagram of the frame structure of another embodiment of a novel armchair.

[0036] Figure 8 The present invention is a schematic diagram of the frame structure of another embodiment of a novel armchair.

[0037] Fig. 9 It is a schematic diagram of the frame structure of Example 5 of a novel armchair.

[0038] Fig.10 It is a partial structural schematic diagram of embodiment 5 of a novel armchair.

[0039] Fig.11It is a schematic diagram of the partial explosion structure of Example 5 of a new type of armchair.

[0040] Fig.12 It is a cross-sectional view of the local structure of Example 5 of a novel armchair.

[0041] Fig.13 It is another cross-sectional view of the local structure of Example 5 of a novel armchair.

[0042] Fig.14 It is a schematic diagram of a partial frame structure of Example 5 of a novel armchair.

[0043] Fig.15 for Fig.14 A is an enlarged schematic diagram.

[0044] In the figure, 1, the first rotating shaft, 2, the armrest, 3, the front supporting leg, 4, the rear supporting leg, 5, the middle frame, 6, the first hinge, 7, the backrest rod, 8, the second hinge, 9, the connecting rod, 10, the spring, 11, the first sleeve, 12, the first limiting member, 13, the second limiting member, 14, the second rotating shaft, 15, the second sleeve, 16, the connecting member, 17, the first channel, 18, the second channel, 19, the retaining edge, 20, the third channel, 11-1, The first cylindrical cavity, 11-2, the second cylindrical cavity, 11-3, the boss, 21, the third sleeve, 22, the key, 23, the third limit member, 24, the fourth limit member, 25, the fifth limit member, 26, the front spring, 27, the rear spring, 28, the limit groove, 29, the adjustment cavity, 29-1, the fourth channel, 29-2, the recess, 30, the side support rod, 31, the footrest rod, 32, the linkage rod, 33, the locking pin, 34, the blocking member. DETAILED DESCRIPTION

[0045] like Figure 1 and 2 As shown, an embodiment 1 of a new type of armchair is provided, comprising a base, a backrest pivotally connected to the base at a first rotating shaft 1, and an armrest 2 connected to the base. In this example, the chair is a folding chair. The base comprises a front support leg 3, a rear support leg 4, and an intermediate frame 5. A first hinge 6 is arranged on the armrest 2. The first hinge 6 is fixedly connected to the armrest and cannot move relative to the armrest, or the first hinge is connected to the armrest in a sliding manner and can be locked at multiple locations within the sliding stroke, so as to realize the function of adjusting the position of the first hinge on the armrest. The upper ends of the front support leg 3 and the rear support leg 4 are pivotally connected to the first hinge 6. When the chair is unfolded, the front support leg 3 and the rear support leg 4 support the armrest 2. The backrest comprises two symmetrically arranged backrest rods 7. A second hinge 8 is pivotally connected to the rear support leg 4. The end of the backrest rod 7 is pivotally connected to the second hinge 8 through the first rotating shaft 1.

[0046] Two elastic components are respectively arranged on the two handrails 2, and the elastic components include a connecting rod 9, a spring 10, a first sleeve 11, a first stopper 12 and a second stopper 13. The first sleeve 11 fixed on the handrail 2 has a cavity with one end open and the other end closed. In this example, one end of the cavity is closed by a closing piece for easy assembly. The cavity is divided into a first cylindrical cavity 11-1 and a second cylindrical cavity 11-2 that are interconnected. The cross-sectional diameter of the first cylindrical cavity 11-1 connected to the opening is smaller than the cross-sectional diameter of the second cylindrical cavity 11-2, so that a boss 11-3 is formed at the connection between the first cylindrical cavity 11-1 and the second cylindrical cavity 11-2. One end of the connecting rod 9 is pivotally connected to the backrest rod 7 through a second rotating shaft 14, and the second rotating shaft 14 is located between the two ends of the backrest rod 7. Both the connecting rod 9 and the backrest rod 7 can rotate on the second rotating shaft 14; the other end of the connecting rod 9 is fixedly connected to the first limiting member 12 and is inserted into the second cylindrical cavity 11-2 after passing through the first cylindrical cavity 11-1. The second limiting member 13 is arranged between the two ends of the connecting rod 9 and slides with the connecting rod 9. The spring 10 is sleeved on the connecting rod 9 and is located between the first limiting member 12 and the second limiting member 13. The cross-sectional diameter of the first cylindrical cavity 11-1 is slightly larger than the cross-sectional diameter of the connecting rod 9, so that the connecting rod 9 can move along the axial direction of the first cylindrical cavity 11-1, and the first cylindrical cavity 11-1 can limit the connecting rod 9 in the radial direction; the outer ring diameter of the first limiting member 12 is slightly smaller than the second cylindrical cavity 11-2, and the outer ring diameter of the second limiting member 13 is slightly smaller than the second cylindrical cavity 11-2 and larger than the diameter of the first cylindrical cavity 11-1. The outer ring diameters of the second limiting member 13 and the first limiting member 12 are both larger than the outer ring diameter of the spring 10. When a user sits on such an armchair and leans his back against the backrest, the backrest swings backward with the first rotating shaft 1 as the axis, the connecting rod 9 is pulled out from the opening by the second rotating shaft 14, the first stopper 12 also moves toward the opening, the second stopper 13 abuts against the boss 11-3 and cannot move, and the spring 10 is compressed by the first stopper 12 and the second stopper 13 to provide elastic force for the backrest. When the user stands up, the rebound force of the spring 10 will reset the backrest. According to other embodiments, the second stopper 13 is removed, so that one end of the spring 10 directly abuts against the boss 11-3.

[0047] According to other embodiments, the first stopper 12 is in the initial position when it abuts against the closed end of the second cylindrical cavity 11-2, and is in the limit position when the spring 10 is in the limit state of compression, and the distance between the initial position and the limit position of the first stopper 12 determines the angle at which the backrest can swing. In this example, when the spring 10 is in a relaxed or slightly compressed state, the first stopper 12 abuts against the closed end of the second cylindrical cavity 11-2, and the second stopper 13 abuts against the boss 11-3, so that the backrest can obtain the elastic force provided by the elastic component within the entire swing range.

[0048] According to other embodiments, two ends of the spring 10 are fixedly connected to the first limiting member 12 and the second limiting member 13 respectively.

[0049] like Figure 3 and 4 As shown, it is an embodiment 2 of this new type of armchair, comprising a base, a backrest pivotally connected to the base at a first rotating shaft 1, and an armrest 2 connected to the base. In this example, the chair is a folding chair. The base comprises a front support leg 3, a rear support leg 4, and an intermediate frame 5. A first hinge 6 is arranged on the armrest 2, and the first hinge 6 is fixedly connected to the armrest and cannot move relative to the armrest, or the first hinge is connected to the armrest in a sliding manner, and can be locked at multiple locations within the sliding stroke, so as to realize the function of adjusting the position of the first hinge on the armrest. The upper ends of the front support leg 3 and the rear support leg 4 are pivotally connected to the first hinge 6, and the front support leg 3 and the rear support leg 4 support the armrest 2 when the chair is unfolded; the backrest comprises two symmetrically arranged backrest rods 7, and a second hinge 8 is pivotally connected to the rear support leg 4, and the end of the backrest rod 7 is pivotally connected to the second hinge 8 through the first rotating shaft 1.

[0050] In this example, the elastic component includes a spring 10, a second sleeve 15 and a connecting member 16; the second sleeve 15 fixed on the armrest 2 has a cylindrical cavity, the spring 10 is arranged in the cylindrical cavity of the second sleeve 15 and can be extended and retracted in the cylindrical cavity, and the connecting member 16 is located at one end of the spring 10 and can move in the cylindrical cavity; both ends of the second rotating shaft 14 penetrate the connecting member 16 and the connecting member 16 can rotate on the second rotating shaft 14. The second rotating shaft 14 is perpendicular to the extension direction of the spring 10, that is, perpendicular to the central axis of the spring 10. The second sleeve 15 is provided with a mirror-symmetrical first channel 17 and a second channel 18, and their length directions are parallel to the extension direction of the spring 10. The width of the first channel 17 and the second channel 18 is slightly larger than the cross-sectional diameter of the second rotating shaft 14. The first end of the second rotating shaft 14 passes through the first channel 17 and then penetrates the backrest rod 7, and the backrest rod 7 can rotate on the second rotating shaft 14, and the second end of the second rotating shaft 14 passes through the second channel 18.

[0051] In order to limit the position of the second rotating shaft 14 in the axial direction and prevent the second rotating shaft 14 from slipping out, ribs 19 are respectively provided at both ends of the second rotating shaft 14 , and the two ribs 19 are respectively close to the backrest rod 7 and the second sleeve 15 .

[0052] In this example, when a user sits on the chair and leans back against the backrest, the backrest swings backward with the first shaft 1 as the axis, the backrest rod 7 drives the second shaft 14 to move along the first channel 17 and the second channel 18, and the spring 10 is compressed by the end of the connecting member 16 and the second sleeve 15 to provide elastic force for the backrest. When the user stands up, the rebound force of the spring 10 will reset the backrest.

[0053] According to Example 3, Figure 5 As shown, the difference from Example 2 is that the second end of the second rotating shaft 14 does not need to penetrate the connecting piece 16, the second sleeve 15 does not need to open the second channel 18, the connecting piece 16 is opened with an annular groove, and the retaining edge 19 at the second end of the second rotating shaft 14 is adapted in the annular groove.

[0054] For Example 2 and Example 3, the end of the cylindrical cavity away from the connecting member 16 is closed, and the spring 10 is pressed against the closed end when it is relaxed or slightly compressed. Therefore, in order to prevent the second rotating shaft 14 and the connecting member 16 from detaching from the second sleeve 15, the first channel 17 and / or the second channel 18 can be set as a waist-shaped hole, the contour of the waist-shaped hole is a closed curved surface, and the second rotating shaft 14 is confined therein, or the end of the cylindrical cavity close to the connecting member 16 can also be closed.

[0055] In addition, according to Example 4, Figure 6 As shown, the armrest 2 is provided with two mirror-symmetrical third channels 20, the two third channels 20 correspond to the first channel 17 and the second channel 18 respectively, the length direction of the third channel 20 is parallel to the central axis of the spring 10 and perpendicular to the second rotating shaft 14; the first end of the second rotating shaft 14 passes through one third channel 20 and then passes through the backrest rod 7 to form a retaining edge 19, and the second end passes through another third channel 20 to form a retaining edge 19. In this example, in order to prevent the second rotating shaft 14 and the connecting member 16 from detaching from the second sleeve 15, the third channel 20 can be set as a waist-shaped hole, and the first channel 17 and the second channel 18 can be set as waist-shaped holes or not, and the end of the cylindrical cavity close to the connecting member 16 can be closed or not.

[0056] Figure 7 Another embodiment of a folding chair that can adopt the elastic component of Example 1, Example 2, Example 3 or Example 4 is shown.

[0057] Figure 8 Another embodiment of a folding chair that can adopt the elastic component of Example 1, Example 2, Example 3 or Example 4 is shown.

[0058] like Figure 9-15As shown, an embodiment 5 of a folding chair comprises a base, a backrest pivotally connected to the base at a first rotating shaft 1, and an armrest 2 connected to the base. In this example, the chair is a folding chair. The base comprises a front support leg 3, a rear support leg 4, and an intermediate frame 5. The upper ends of the front support leg 3 and the rear support leg 4 are pivotally connected to a first hinge 6. When the chair is unfolded, the front support leg 3 and the rear support leg 4 support the armrest 2. The backrest comprises two symmetrically arranged backrest rods 7. The intermediate frame 5 is pivotally connected to the front support leg 3 and the backrest rod 7 respectively. A second hinge 8 is pivotally connected to the rear support leg 4. The backrest rod 7 is pivotally connected to the second hinge 8 through the first rotating shaft 1.

[0059] The elastic component includes a third sleeve 21, a key 22, a connecting rod 9, a third limit member 23, a fourth limit member 24, a fifth limit member 25, a front spring 26 and a rear spring 27. The third sleeve 21 fixed on the armrest 2 has a cavity, one end of the cavity is open, and the other end has a blocking member 34. In this example, the blocking member 34 is a part of the third sleeve. In other examples, the blocking member 34 can also be used as a component independent of the third sleeve and fixedly connected to the third sleeve or other parts of the armrest. The third sleeve 21 is provided with a limiting hole near the opening, and the third limiting member 23 is provided with a limiting groove 28; one end of the connecting rod 9 is fixedly connected to the fourth limiting member 24 and inserted into the cavity of the third sleeve 21, and the other end of the connecting rod 9 passes through the third limiting member 23 and is pivotally connected to the backrest rod 7 through the second rotating shaft 14. After the backrest is unfolded, the second rotating shaft 14 is located above the first rotating shaft 1, and the third limiting member 23 is slidably matched with the connecting rod 9; the fifth limiting member 25 located between the third limiting member 23 and the fourth limiting member 24 is slidably matched with the connecting rod 9; the front spring 26 is sleeved on the connecting rod 9 and its two ends are respectively connected to the fourth limiting member 24 and the fifth limiting member 25, and the rear spring 27 is sleeved on the connecting rod 9 and its two ends are respectively connected to the third limiting member 23 and the fifth limiting member 25, and the stiffness coefficient of the rear spring 27 is greater than the stiffness coefficient of the front spring 26. In this example, when assembling the elastic component, force is applied to press the third limit member 23 into the cavity of the third sleeve 21 so that the limit groove 28 corresponds to the limit hole, and then the key 22 is inserted into the limit groove 28 along the limit hole from the outside of the sleeve, so that the third sleeve 21 is fixed to the third limit member 23; because the fourth limit member 24 is pressed against the blocking member 34, the front spring 26 and the rear spring 27 are slightly compressed, so that the third limit member 23 and the key 22 obtain a certain pressure, so that the key 22 is not easy to fall out of the limit hole and the limit groove 28.

[0060] When a user sits on this type of armchair and leans against the backrest, the backrest is forced to swing backward with the first rotating shaft 1 as the axis, the connecting rod 9 is pulled out from the opening by the second rotating shaft, and the fourth limiter 24 also moves toward the opening. Since the third limiter 23 is fixed, the front spring 26 and the rear spring 27 are compressed to provide elastic force for the backrest. When the user stands up, the spring rebound force of the spring will reset the backrest. In this example, since the stiffness coefficient of the rear spring 27 is greater than the stiffness coefficient of the front spring 26, the deformation of the front spring 26 is greater than the deformation of the rear spring 27 when the pressures they are subjected to are the same. Therefore, when the user is lighter or has a more upright sitting posture, the force applied to the backrest is smaller, and the deformation of the rear spring 27 is smaller. At this time, the swing amplitude of the backrest is mainly provided by the deformation of the front spring 26. Based on this, in order to allow users to adjust their sitting posture, in this example, the inner wall of the armrest 2 has two mirror-symmetrical adjustment cavities 29 surrounded by surfaces, and the adjustment cavity 29 includes a strip-shaped fourth channel 29-1 and three notches 29-2 located on one side of the fourth channel 29-1; a locking pin 33 is respectively provided on the two sides of the first hinge corresponding to the two adjustment cavities 29, and the locking pin 33 is inserted into the adjustment cavity 29. The opening of the notch 29-2 is inclined toward the backrest. When the locking pin 33 enters the notch 29-2, the backrest will pull the armrest 2 backward, thereby locking the locking pin 33 in the notch 29-2. When the user slightly lifts the armrest 2 forward and upward, the locking pin 33 is separated from the notch 29-2 and enters the fourth channel 29-1. Since the locking pin 33 can move in the fourth channel 29-1 at this time, and the length direction of the fourth channel 29-1 is roughly the front-back direction, the user can move the armrest 2 forward and backward; during the movement of the armrest 2, the backrest is driven to change the tilt angle to a large extent. The user moves the armrest 2 forward and slightly presses down, so that the locking pin 33 can enter the previous notch 29-2. If the user lifts the armrest 2 and leans back, the armrest 2 is pulled back by the backrest, and the locking pin 33 will enter the next notch 29-2. In this example, the number of notches 29-2 is three, corresponding to three different sitting postures of the user, such as slightly leaning, half-lying and fully lying. When the backrest is in a slightly leaning state, the user's back leans against the backrest. Since the back exerts less force on the backrest, the deformation of the front spring 26 provides a certain swing amplitude to the backrest, thereby providing a buffer for the user's back, and the deformation of the rear spring 27 is smaller. When the backrest is in a half-lying or fully lying state, the backrest is subjected to greater pressure. When the user shakes his back, the front spring 26 and the rear spring 27 both produce greater deformation, and the backrest can swing more significantly at this time.

[0061] In this example, the folding chair further includes a foot support part, which is U-shaped and includes two side support rods 30 and a footrest rod 31 connected between the two side support rods 30. The upper ends of the side support rods 30 are pivotally connected to the middle frame 5, and the lower ends of the backrest rods 7 are connected to the side support rods 30 through a linkage rod 32. The two ends of the linkage rod 32 are respectively pivotally connected to the side support rods 30 and the backrest rod 7. The foot support part is linked to the backrest through the linkage rod 32. When the backrest is tilted backward, the footrest rod 31 is lifted upward, and when the backrest is tilted forward, the footrest rod 31 falls, thereby providing a more comfortable experience for the user.

[0062] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A new type of armchair, comprising a base, a backrest pivotally connected to the base at a first rotating shaft, and an armrest connected to the base, characterized in that: It also includes an elastic component fixed on the armrest, the backrest and the elastic component are pivotally connected via a second rotating shaft, and the elastic component is used to provide elastic force when the backrest swings about the first rotating shaft; The elastic component includes a connecting rod, a spring, a first sleeve and a first limiting member; The first sleeve fixed on the armrest has a cavity with one end open and the other end closed, one end of the connecting rod is pivotally connected to the backrest through the second rotating shaft, the connecting rod and the backrest are both rotatably connected to the second rotating shaft, the other end of the connecting rod is fixedly connected to the first limiting member and inserted into the cavity of the first sleeve, the cavity of the first sleeve has a boss, the spring is sleeved on the connecting rod and is located between the boss and the first limiting member, when the first limiting member moves toward the opening, the spring is compressed by the boss and the first limiting member.

2. A new type of armchair as claimed in claim 1, characterized in that: The elastic component also includes a second limit member, which is arranged between the first limit member and the boss and slides with the connecting rod. The spring is located between the first limit member and the second limit member. When the first limit member moves toward the opening, the spring is compressed by the first limit member and the second limit member and the boss blocks the second limit member.

3. A new type of armchair as claimed in claim 2, characterized in that: The backrest comprises a backrest rod, an end of the backrest rod is pivotally connected to the base through a first rotating shaft, one end of the connecting rod is pivotally connected to the backrest rod through a second rotating shaft, and the second rotating shaft is located between the two ends of the backrest rod.

4. A new type of armchair, comprising a base, a backrest pivotally connected to the base at a first rotating shaft, and an armrest connected to the base, characterized in that: It also includes an elastic component fixed on the armrest, the backrest and the elastic component are pivotally connected via a second rotating shaft, and the elastic component is used to provide elastic force when the backrest swings about the first rotating shaft; The elastic component includes a spring, a second sleeve and a connecting piece; The second sleeve fixed on the armrest has a cavity, the spring is arranged in the cavity of the second sleeve, the connecting piece is located at one end of the spring and can move in the cavity along the expansion and contraction direction of the spring; the connecting piece is pivotally connected to the backrest through the second rotating shaft, and the connecting piece is rotationally connected to the second rotating shaft; the second sleeve is provided with a first channel, the length direction of the first channel is parallel to the central axis of the spring and perpendicular to the second rotating shaft, and the first end of the second rotating shaft penetrates the connecting piece and the first channel and is rotationally connected to the backrest.

5. A new type of armchair as claimed in claim 4, characterized in that: The second sleeve defines a second channel which is mirror-symmetrical to the first channel, and the second end of the second rotating shaft penetrates the connecting member and the second channel.

6. A new type of armchair as claimed in claim 5, characterized in that: The outline of the first channel and / or the outline of the second channel is a closed curved surface.

7. A new type of armchair as claimed in claim 5 or 6, characterized in that: The armrest is provided with two mirror-symmetrical third channels, the two third channels correspond to the first channel and the second channel respectively, and the length direction of the third channel is parallel to the central axis of the spring and perpendicular to the second rotating axis; Two ends of the second rotating shaft pass through the two third channels respectively.

8. A new type of armchair as claimed in claim 7, characterized in that: The outline of the third channel is a closed curved surface.

9. A new type of armchair as claimed in claim 8, characterized in that: The backrest comprises a backrest rod, an end of which is pivotally connected to the base via a first rotating shaft, and the connecting member is pivotally connected to the backrest rod via a second rotating shaft, wherein the second rotating shaft is located between the two ends of the backrest rod.

10. A new type of armchair, comprising a base, a backrest pivotally connected to the base at a first rotating shaft, and an armrest connected to the base, characterized in that: It also includes an elastic component fixed on the armrest, the backrest and the elastic component are pivotally connected via a second rotating shaft, and the elastic component is used to provide elastic force when the backrest swings about the first rotating shaft; The elastic component includes a connecting rod, a third limiting member, a fourth limiting member, a fifth limiting member, a front spring and a rear spring, the third limiting member is fixedly connected to the armrest, one end of the connecting rod is pivotally connected to the backrest through the second rotating shaft, the other end of the connecting rod passes through the third limiting member and is fixedly connected to the fourth limiting member, the third limiting member is slidably matched with the connecting rod, and the fifth limiting member located between the third limiting member and the fourth limiting member is slidably matched with the connecting rod; the front spring is sleeved on the connecting rod and is located between the fourth limiting member and the fifth limiting member, the rear spring is sleeved on the connecting rod and is located between the third limiting member and the fifth limiting member, and the stiffness coefficient of the rear spring is greater than the stiffness coefficient of the front spring; When the fourth limiting member moves toward the third limiting member, the front spring is compressed by the fourth limiting member and the fifth limiting member, and the rear spring is compressed by the fifth limiting member and the third limiting member.

11. A new type of armchair as claimed in claim 10, characterized in that: The armrest has a first adjustment portion, and the base includes a second adjustment portion connected to the first adjustment portion; The first adjustment portion cooperates with the second adjustment portion to enable the armrest to move relative to the base and to be locked in a plurality of positions; The backrest is linked with the armrest, and when the armrest is locked at different positions, the backrest rotates to a corresponding tilt angle.

12. A new type of armchair as claimed in claim 11, characterized in that: The second adjustment part is a locking pin, the first adjustment part has an adjustment cavity surrounded by a surface, the locking pin is inserted into the adjustment cavity, the adjustment cavity includes a fourth channel suitable for the movement of the locking pin and a plurality of recesses suitable for the locking pin to be embedded, and the surface forming the recess is suitable for locking the locking pin.

13. A new type of armchair as claimed in claim 12, characterized in that: The elastic component further comprises a third sleeve and a key, the third sleeve fixed on the armrest has a cavity, one end of the cavity is open and the other end has a blocking member, the third sleeve has a limiting hole near the opening, and the third limiting member has a limiting groove; One end of the connecting rod fixed with the fourth limiting member is inserted into the cavity of the third sleeve from the opening and stops at the blocking member, and the clamping key is inserted into the limiting hole and the limiting groove.

14. A new type of armchair as claimed in claim 13, characterized in that: The backrest comprises a backrest rod, the backrest rod is pivotally connected to the base through a first rotating shaft, and one end of the connecting rod is pivotally connected to the backrest rod through the second rotating shaft.

15. A new type of armchair as claimed in claim 14, characterized in that: It also includes a foot support portion, which includes a side support rod whose end is pivotally connected to the base, and the end of the backrest rod is connected to the side support rod through a linkage rod, and the two ends of the linkage rod are pivotally connected to the side support rod and the backrest rod respectively.

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