Swinging chassis device

Abstract

The utility model provides a swing chassis device which comprises a base, a first swing seat and a second swing seat, the first swing seat is hinged to the base through a first rotating shaft, the second swing seat is hinged to the first swing seat through a second rotating shaft, the second swing seat can swing front and back, and the first swing seat can drive the second swing seat to swing left and right together. An elastic buffering piece for providing buffering and resetting force is arranged between the first swinging seat and the base; the base is used for being connected with a chair leg air rod, the first swing seat can swing left and right on the base under the action of the first swing seat, and the second swing seat can swing front and back on the first swing seat and can swing left and right together with the first swing seat under the driving of the first swing seat. Therefore, the chair seat connected to the second swing seat can swing front, back, left and right.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a swing chassis device. Background Art

[0002] Chairs are one of the most common pieces of furniture and we spend a lot of time with them during the day, especially in offices where users spend most of the day sitting in chairs. However, people are also experiencing more and more comfort and health problems due to long periods of sitting. In terms of comfort, sitting in the same posture for a long time will make people feel more tired, with discomfort in the cervical spine and back, numbness in the buttocks and legs, etc. The discomfort will make it difficult for people to maintain a happy mood and focus on work. In terms of health issues, sitting in the same posture for a long time will cause compression of the lumbar spine and legs, which will in turn increase the incidence of diseases such as lumbar spondylosis.

[0003] People have found that standing up after sitting for a long time can relieve fatigue, and changing sitting posture while sitting can also effectively eliminate fatigue and reduce the harm caused by sitting for a long time. Therefore, how to achieve greater flexibility in changing sitting posture and greater comfort when changing is the key to solving the above problems and achieving more comfortable and healthy sitting. Summary of the invention

[0004] In order to solve the above-mentioned technical problems, the utility model provides a swing chassis device, including a base, a first swing seat and a second swing seat, the first swing seat is hinged on the base through a first rotating shaft, the second swing seat is hinged on the first swing seat through a second rotating shaft, the second swing seat can swing back and forth, the first swing seat can drive the second swing seat to swing left and right together, and an elastic buffer member providing buffering and restoring force is arranged between the first swing seat and the base; the base is used to connect the chair leg gas rod, under the action of the first swing seat, the first swing seat can swing left and right on the base, the second swing seat can swing back and forth on the first swing seat and can swing left and right together with the first swing seat under the drive of the first swing seat, so that the chair seat connected to the second swing seat can swing back and forth, left and right, thereby making the swinging flexibility higher, more flexible when changing sitting posture, adapting to more sitting postures, more arbitrary and higher comfort for users, and the elastic buffer member also improves the comfort during swinging.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A swing chassis device includes a base, a first swing seat and a second swing seat, the first swing seat is hinged on the base through a first rotating shaft arranged along the front and back, the second swing seat is hinged on the first swing seat through a second rotating shaft arranged along the left and right, the first swing seat is configured to drive the second swing seat to swing left and right on the base, and the second swing seat is configured to connect to a seat and swing back and forth on the first swing seat; an elastic buffer is provided between the first swing seat and the base, and the elastic buffer is configured to provide swing buffering and reset force for the first swing seat.

[0007] The base is used to connect the chair leg gas rod. Under the action of the first swing seat, the first swing seat can swing left and right on the base, and the second swing seat can swing back and forth on the first swing seat and can swing left and right together with the first swing seat under the drive of the first swing seat, so that the seat connected to the second swing seat can swing back and forth, left and right, thereby making the swinging flexibility higher, more flexible when changing sitting posture, adapting to more sitting postures, users can do what they want, and the comfort is higher, and the elastic buffer also improves the comfort during swinging.

[0008] Preferably, a first mounting hole is provided on the first swing seat or one of the bases, a first locking hole is provided on the other of the first swing seat or the base, a first locking member is inserted into the first mounting hole, the first locking member is selectively slidably arranged on the first swing seat and the base, and selectively enters or leaves the first locking hole; the first locking member is configured to selectively enter the first locking hole to lock the first swing seat and the base, or selectively leave the first locking hole to unlock the first swing seat and the base. The first locking member is slidably arranged on the first swing seat and the base, and the first locking member is inserted in the first mounting hole and slidably cooperates with the first mounting hole, and when the first locking member slides toward the first locking hole and enters the first locking hole, it can lock the first swing seat and the base, so that the first swing seat cannot move on the base. Similarly, when the first locking member leaves the first locking hole, the first swing seat and the base are unlocked, and the first swing seat can move on the base.

[0009] Preferably, the first locking member is arranged in the left-right direction, and an operating rod arranged in the left-right direction is inserted on the base and the first swing seat, the operating rod is connected to the first locking member, and the operating rod is configured to pull the operating rod to drive the first locking member to leave or enter the first locking hole. The pull-out operating rod is convenient for the user to operate to drive the first locking member to slide.

[0010] Preferably, a push-pull torsion spring is sleeved on the operating rod, one of the torsion spring arms of the push-pull torsion spring is fixed on the operating rod, and the other torsion spring arm of the push-pull torsion spring is arranged on the first locking piece. The push-pull torsion spring is configured so that the operating rod drives the first locking piece to move through the push-pull torsion spring.

[0011] Preferably, the push-pull torsion spring has a bent portion, which is bent downward and abuts against the base, and a convex portion is provided on the base, and the convex portion is configured so that when the operating rod moves, the bent portion passes over the convex portion to allow the first locking member to enter or leave the first locking hole. The convex portion is arranged on the movement path of the push-pull torsion spring, and when the operating rod drives the push-pull torsion spring and then drives the first locking member to slide, the push-pull torsion spring abutting against the base will pass through the convex portion, and when the push-pull torsion spring moves toward the first locking hole and passes through the convex portion, the first locking member enters the locking hole, and the cooperation between the push-pull torsion spring and the convex portion will give the user a hand feeling feedback of locking the first swing seat and the base, and vice versa, feedback can also be received when unlocking; firstly, the elasticity of the push-pull torsion spring combined with the convex portion allows the unlocking and locking operation to be completed in one step, and secondly, the completion of unlocking and locking can be fed back to the user, so that the user can clearly understand the state of the chassis device at this time.

[0012] Preferably, an operating rod is provided on the base or the first swing seat, and the operating rod is selectively rotatable; the operating rod is arranged in the left-right direction, and the first locking member is arranged in the front-back direction, the operating rod is connected to the first locking member, and the operating rod is configured so that the operating rod rotates to drive the first locking member to leave or enter the first locking hole. This solution drives the movement of the first locking member through the rotating operating rod to achieve locking and unlocking of the first swing seat.

[0013] Preferably, a push-pull torsion spring is sleeved on the operating rod, one of the torsion spring arms of the push-pull torsion spring is fixed on the operating rod, and the other torsion spring arm of the push-pull torsion spring is arranged on the first locking member, and the push-pull torsion spring is configured so that the operating rod drives the first locking member to move through the push-pull torsion spring. The push-pull torsion spring can convert the rotation of the operating rod into a sliding driving force for the first locking member.

[0014] Preferably, a gear seat is provided on the base or the first swing seat, a synchronously rotating gear member is sleeved on the operating rod, a gear slot is provided on the gear seat, and the gear member is inserted in the gear slot; the gear slot has a first gear and a second gear, a convex portion is provided between the first gear and the second gear, the convex portion protrudes toward the inside of the gear slot, and the gear member switches between the first gear and the second gear by crossing the convex portion. The convex portion gives inertia when switching gears to increase the operating feel, so that the user can feel the completion of the gear switching, and after completing the gear switching, the gear member is left in the current gear.

[0015] Preferably, there are two first locking members, which are symmetrically arranged on both sides of the first rotating shaft. Since the first locking members in this solution are arranged to slide forward and backward, when both the left and right sides of the first swing seat and the base are acted upon by the first locking members, the balance and stability during locking can be maintained.

[0016] Preferably, the second swing seat includes two end plates located on the left and right sides, the second rotating shaft is arranged in the middle of the end plates and passes through the first swing seat and the two end plates, one of the end plates is provided with a rotation groove on the side of the second rotating shaft, and the other end plate is correspondingly provided with a second locking hole; the first swing seat and the second swing seat are unlocked or locked by a second locking piece for relative rotation between the second swing seat and the first swing seat, a second mounting hole is arranged on the first swing seat, the second locking piece is inserted in the rotation groove and the second mounting hole, the second locking piece is selectively slidably arranged on the first swing seat and the second swing seat along the left and right directions, the second locking piece is configured to selectively enter the second locking hole to lock the first swing seat and the second swing seat or selectively leave the second locking hole to unlock the second swing seat and the first swing seat; when the second locking piece leaves the second locking hole and the second swing seat rotates relative to the first swing seat, the second locking piece moves in the rotation groove.

[0017] Preferably, the elastic buffer is a spring, and there are at least two springs, which are symmetrically distributed on both sides of the first rotating shaft. There can be one spring on one side or two springs on one side, and the number of springs on both sides should be the same to maintain force balance.

[0018] Preferably, the elastic buffer is a buffer reset torsion spring, which is sleeved on the first rotating shaft. When the two torsion spring arms of the buffer reset torsion spring act on the base and the first swing seat respectively, in order to maintain the force balance on the left and right sides of the first rotating shaft, the number of the buffer reset torsion springs is at least an even number, and the number of torsion spring arms on both sides of the first rotating shaft is the same, that is, the number of the buffer reset torsion spring with the torsion spring arm facing the left side is the same as the number of the buffer reset torsion spring with the torsion spring arm facing the right side.

[0019] Preferably, a back connector is provided on the first swing seat, and the back connector is configured to connect the chair back and swing along with the swing of the first swing seat. This solution enables the chair back and the chair seat to swing left and right together.

[0020] Preferably, the front end of the back connecting member is rotatably connected to the first swing seat; the back connecting member and the second swing seat are linked via a linkage structure, and the linkage structure is configured so that when the back connecting member rotates on the first swing seat, the second swing seat is driven to swing forward and backward. The back connecting member is linked with the second swing seat, and when the backrest is reclined, the second swing seat can also swing backward and tilt up at the front, which makes the overall comfort stronger; the forward and backward swing of the second swing seat can be directly applied to the seat-back linkage when the backrest is reclined.

[0021] Preferably, the linkage structure includes a sliding rotating member and a sliding rotating groove. A connecting seat extends obliquely downward from the rear of the second swing seat. The connecting seat is connected to the sliding rotating member. The sliding rotating member is arranged in the left-right direction. The sliding rotating groove is provided on the back connecting member. The sliding rotating member is inserted into the sliding rotating groove. When the back connecting member rotates on the first swing seat, the sliding rotating member and the sliding rotating groove move and rotate relative to each other, driving the second swing seat to swing forward and backward. This solution realizes the linkage between the back connecting member and the second swing seat, thereby realizing the seat-back linkage, and the structure is simpler.

[0022] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0023] The base is used to connect the chair leg gas rod. Under the action of the first swing seat, the first swing seat can swing left and right on the base, and the second swing seat can swing back and forth on the first swing seat and can swing left and right together with the first swing seat under the drive of the first swing seat, so that the seat connected to the second swing seat can swing back and forth, left and right, thereby making the swinging flexibility higher, more flexible when changing sitting posture, adapting to more sitting postures, users can do what they want, and the comfort is higher, and the elastic buffer also improves the comfort during swinging. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The three-dimensional structure of the swing chassis device in Example 1 of the utility model is shown in FIG. Figure 1 ;

[0025] Figure 2 The three-dimensional structure of the swing chassis device in Example 1 of the utility model is shown in FIG. Figure 2 ;

[0026] Figure 3 It is an exploded view of the swing chassis device in Example 1 of the utility model;

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure inside the base in Example 1 of the utility model;

[0028] Figure 5 This is a top view of the interior of the base in Example 1 of the utility model;

[0029] Figure 6 It is an exploded view of the swing chassis device in Example 2 of the present utility model;

[0030] Figure 7 It is an exploded view of the swing chassis device in Example 3 of the utility model;

[0031] Figure 8 This is a top view of the interior of the base in Example 3 of the present utility model;

[0032] Fig. 9 It is a schematic diagram of the three-dimensional structure of the swing chassis device in Example 4 of the utility model;

[0033] Fig.10 It is an exploded view of the swing chassis device in Example 4 of the utility model;

[0034] Fig.11 This is a schematic diagram of the three-dimensional structure of the gear seat in Example 4 of the utility model;

[0035] Fig.12 The three-dimensional structure diagram of the back connecting member in the embodiment 5 of the utility model is rotatably arranged on the first swing seat Figure 1 ;

[0036] Fig.13 The three-dimensional structure diagram of the back connecting member in the embodiment 5 of the utility model is rotatably arranged on the first swing seat Figure 2 .

[0037] The figures are marked as follows: base 1; first swing seat 2; second swing seat 3; first rotating shaft 4; second rotating shaft 5; spring 6; first mounting hole 7; first locking hole 8; first locking piece 9; operating lever 10; push-pull torsion spring 11; bending portion 12; convex portion 13; end plate 14; rotating groove 15; second locking hole 16; second locking piece 18; second mounting hole 19; buffering return torsion spring 20; gear seat 21; gear piece 22; gear groove 23; first gear 231; second gear 232; back connecting piece 24; sliding rotating piece 25; sliding rotating groove 26; connecting seat 27. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0040] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0041] The specific implementation of the utility model is as follows: Example

[0042] like Figure 1-3As shown, the utility model provides a swing chassis device, including a base 1, a first swing seat 2 and a second swing seat 3, the first swing seat 2 is hinged on the base 1 through a first rotating shaft 4 arranged along the front and back, the second swing seat 3 is hinged on the first swing seat 2 through a second rotating shaft 5 arranged along the left and right, the first swing seat 2 is configured to drive the second swing seat 3 to swing left and right on the base 1, and the second swing seat 3 is configured to connect the seat and swing back and forth on the first swing seat 2; an elastic buffer is provided between the first swing seat 2 and the base 1, and the elastic buffer is configured to provide swing buffering and reset force for the first swing seat 2.

[0043] The base 1 is used to connect the chair leg gas rod. Under the action of the first swing seat 2, the first swing seat 2 can swing left and right on the base 1, and the second swing seat 3 can swing back and forth on the first swing seat 2 and can swing left and right together with the first swing seat 2 under the drive of the first swing seat 2, so that the seat connected to the second swing seat 3 can swing back and forth, left and right, thereby making the swing more flexible, making it more flexible when changing sitting postures, adapting to more sitting postures, and allowing users to do what they want with higher comfort, and the elastic buffer also improves the comfort during swinging.

[0044] Specifically, if Figure 3-5 As shown, there are two first rotating shafts 4, which respectively hinge the front of the base 1 with the front of the first swing seat 2, and hinge the rear of the base 1 with the rear of the first swing seat 2; the elastic buffer is a spring 6, and there are four springs 6. The springs 6 are vertically arranged and symmetrically distributed on both sides of the first rotating shaft 4, that is, there are two springs 6 on each side, and the springs 6 on both sides are symmetrically distributed to maintain force balance.

[0045] Two first mounting holes 7 are provided on the base 1, and a first locking hole 8 is provided on the first swing seat 2. The two first mounting holes 7 are coaxial and distributed in the left-right direction. A first locking piece 9 arranged in the left-right direction is inserted in the first mounting hole 7. The first locking piece 9 is selectively slidably arranged on the base 1 and selectively enters or leaves the first locking hole 8; the first locking piece 9 is configured to selectively enter the first locking hole 8 to lock the first swing seat 2 and the base 1 or selectively leave the first locking hole 8 to unlock the first swing seat 2 and the base 1; the movement of the first locking piece 9 is controlled by an operating rod 10, and the operating rod 10 is inserted in the base 1 in the left-right direction. The operating rod 10 and the first locking piece 9 are connected by a push-pull torsion spring 11. When the operating rod 10 slides left and right on the base 1, the push-pull torsion spring 11 is driven to move, thereby driving the first locking piece 9 to move; further, one of the torsion spring arms of the push-pull torsion spring 11 is fixed on the operating rod 10, and the push-pull torsion spring 11 is fixed to the operating rod 10. The other torsion spring arm is arranged on the first locking piece 9, and the push-pull torsion spring 11 is located inside the base 1 and the first swing seat 2. The push-pull torsion spring 11 has a bent portion 12, which is bent downward and abuts against the base 1. A convex portion 13 is provided on the base 1, and the convex portion 13 is arranged on the movement path of the push-pull torsion spring 11. When the operating rod 10 drives the push-pull torsion spring 11 and then drives the first locking piece 9 to slide, the push-pull torsion spring 11 abutting against the base 1 will pass through the convex portion 13. When the push-pull torsion spring 11 moves toward the first locking hole 8 and passes through the convex portion 13, the first locking piece 9 enters the locking hole, and the cooperation between the push-pull torsion spring 11 and the convex portion 13 will give the user a hand-feel feedback of locking the first swing seat 2 and the base 1, and vice versa, feedback can also be received when unlocking; in this way, the elasticity of the push-pull torsion spring 11 is combined with the convex portion 13 to make the unlocking and locking operation in one step, and secondly, the completion of unlocking and locking can be fed back to the user, so that the user can clearly understand the state of the chassis device at this time.

[0046] In the above scheme, the pull-out operating lever 10 is easy for the user to operate to drive the first locking piece 9 to slide; the first locking piece 9 is slidably arranged on the first swing seat 2 and the base 1, and the first locking piece 9 is inserted in the first mounting hole 7 and slidably cooperates with the first mounting hole 7, and when the first locking piece 9 slides toward the first locking hole 8 and enters the first locking hole 8, it can lock the first swing seat 2 and the base 1, so that the first swing seat 2 cannot move on the base 1. Similarly, when the first locking piece 9 leaves the first locking hole 8, the first swing seat 2 and the base 1 are unlocked, and the first swing seat 2 can move on the base 1.

[0047] The second swing seat 3 includes two end plates 14 located on the left and right sides, the two ends of which protrude downward and are located on both sides of the first swing seat 2. The second swing seat 3, the first swing seat 2 and the base 1 are distributed in sequence from top to bottom; the second shaft 5 is arranged in the middle of the end plate 14 and passes through the first swing seat 2 and the two end plates 14, one of the end plates 14 is provided with a rotation groove 15 on the side of the second shaft 5, and the other end plate 14 is provided with a second locking hole 16 correspondingly; the first swing seat 2 and the second swing seat 3 are unlocked or locked by a second locking member 18 for relative rotation between the second swing seat 3 and the first swing seat 2, and the second locking member 18 is provided for relative rotation between the first swing seat 2 and the second swing seat 3. A second mounting hole 19 is provided on a swing seat 2, and a second locking member 18 is inserted in the rotation groove 15 and the second mounting hole 19. The second locking member 18 is selectively slidably arranged on the first swing seat 2 and the second swing seat 3 along the left-right direction. The second locking member 18 is configured to selectively enter the second locking hole 16 to lock the first swing seat 2 and the second swing seat 3 or selectively leave the second locking hole 16 to unlock the second swing seat 3 and the first swing seat 2; when the second locking member 18 leaves the second locking hole 16 and the second swing seat 3 rotates relative to the first swing seat 2, the second locking member 18 moves in the rotation groove 15.

[0048] Embodiment 2: The difference between this embodiment and embodiment 1 is only the number of springs 6. Specifically:

[0049] like Figure 6 , 7 As shown, in this embodiment, there are two springs 6 , and the two springs 6 are vertically and symmetrically distributed on both sides of the first rotating shaft 4 .

[0050] Embodiment 3: The difference between this embodiment and embodiment 1 is only in the elastic buffer and its arrangement. Specifically:

[0051] like Figure 8 As shown, the elastic buffer member is a buffer return torsion spring 20, which is sleeved on the first rotating shaft 4; the number of the buffer return torsion springs 20 is at least an even number. In this embodiment, considering the cost, two buffer return torsion springs 20 are selected, and the two buffer return torsion springs 20 are respectively sleeved on the two first rotating shafts 4. The two torsion spring arms of the buffer return torsion spring 20 act on the base 1 and the first swing seat 2 respectively, and the two torsion spring arms of the two buffer return torsion springs 20 face opposite directions to maintain the force balance on the left and right sides of the first rotating shaft 4.

[0052] When more buffer return torsion springs 20 are selected, in order to maintain the force balance on the left and right sides of the first rotating shaft 4, the number of torsion spring arms on both sides of the first rotating shaft 4 is the same, that is, the number of buffer return torsion springs 20 with torsion spring arms facing the left side is the same as the number of buffer return torsion springs 20 with torsion spring arms facing the right side.

[0053] Embodiment 4: This embodiment differs from Embodiment 1 in that the operation modes of locking and unlocking the first swing seat 2 and the base 1 are different; specifically:

[0054] like Figure 9-11 As shown, the scheme drives the movement of the first locking member 9 by a rotating operating rod 10 to achieve locking and unlocking of the first swing seat 2. The first swing seat 2 is provided with an operating rod 10, and the operating rod 10 is selectively rotatable; the operating rod 10 is arranged along the left and right direction, and the first locking member 9 is arranged along the front and rear direction. The operating rod 10 is connected to the first locking member 9, and the operating rod 10 is configured so that the operating rod 10 rotates to drive the first locking member 9 to leave or enter the first locking hole 8; there are two first locking members 9, and the two first locking members 9 are symmetrically arranged on both sides of the first rotating shaft 4; since the first locking member 9 in the scheme is arranged to slide back and forth, when the left and right sides of the first swing seat 2 and the base 1 are both acted upon by the first locking member 9, the balance and stability during locking can be maintained.

[0055] The operating rod 10 is sleeved with a push-pull torsion spring 11, one of the torsion spring arms of the push-pull torsion spring 11 is fixed on the operating rod 10, and the other torsion spring arm of the push-pull torsion spring 11 is arranged on the first locking member 9. The push-pull torsion spring 11 is configured so that the operating rod 10 drives the first locking member 9 to move through the push-pull torsion spring 11; the push-pull torsion spring 11 can make the rotation of the operating rod 10 become the sliding driving force of the first locking member 9; further, a gear seat 21 is provided on the first swing seat 2, and a synchronously rotating gear member 22 is sleeved on the operating rod 10, and a gear seat 21 is provided The gear slot 23 has a first gear position 231 and a second gear position 232, and a convex portion 13 is provided between the first gear position 231 and the second gear position 232. The convex portion 13 protrudes toward the inside of the gear slot 23, and the gear member 22 switches between the first gear position 231 and the second gear position 232 over the convex portion 13; the convex portion 13 gives inertia during gear switching to increase the operating feel, so that the user can feel the completion of the gear switching, and after completing the gear switching, the gear member 22 is left in the current gear position.

[0056] Embodiment 5: The difference between this embodiment and embodiment 4 is that a back connecting member 24 is provided to realize seat-back linkage; specifically:

[0057] like Fig.12 , 13As shown, this scheme enables the chair back and the seat to swing left and right together: a back connector 24 is provided on the first swing seat 2, and the back connector 24 is configured to connect the chair back and swing with the swing of the first swing seat 2; the front end of the back connector 24 is rotatably connected to the first swing seat 2; the back connector 24 and the second swing seat 3 are linked by a linkage structure, and the linkage structure is configured so that when the back connector 24 rotates on the first swing seat 2, it drives the second swing seat 3 to swing back and forth; the back connector 24 is linked with the second swing seat 3, and when the chair back reclines, the second swing seat 3 can also swing backward and tilt the front part, which makes the overall comfort stronger; the forward and backward swinging of the second swing seat 3 can be directly applied to the seat-back linkage when the chair back reclines.

[0058] Furthermore, the linkage structure includes a sliding rotating member 25 and a sliding rotating groove 26. A connecting seat 27 extends obliquely downward from the rear of the second swing seat 3. The connecting seat 27 is connected to the sliding rotating member 25. The sliding rotating member 25 is arranged in the left and right directions. The sliding rotating groove 26 is opened on the back connecting member 24. The sliding rotating member 25 is inserted in the sliding rotating groove 26. When the back connecting member 24 rotates on the first swing seat 2, the sliding rotating member 25 and the sliding rotating groove 26 move and rotate relative to each other, driving the second swing seat 3 to swing back and forth. This scheme is used to realize the linkage between the back connecting member 24 and the second swing seat 3, thereby realizing the seat-back linkage, and the structure is simpler.

Claims

1. A swing chassis device, characterized in that: It includes a base, a first swing seat and a second swing seat, the first swing seat is hinged on the base through a first rotating shaft arranged along the front and back, the second swing seat is hinged on the first swing seat through a second rotating shaft arranged along the left and right, the first swing seat is configured to drive the second swing seat to swing left and right on the base, and the second swing seat is configured to connect the seat and swing back and forth on the first swing seat; an elastic buffer is provided between the first swing seat and the base, and the elastic buffer is configured to provide swing buffering and reset force for the first swing seat.

2. The swing chassis device according to claim 1, characterized in that: A first mounting hole is provided on the first swing seat or one of the bases, a first locking hole is provided on the other of the first swing seat or the base, a first locking piece is inserted into the first mounting hole, the first locking piece is selectively slidably arranged on the first swing seat and the base, and selectively enters or leaves the first locking hole; the first locking piece is configured to selectively enter the first locking hole to lock the first swing seat and the base, or selectively leave the first locking hole to unlock the first swing seat and the base.

3. The swing chassis device according to claim 2, characterized in that: The first locking piece is arranged along the left-right direction, and an operating rod arranged along the left-right direction is inserted on the base and the first swing seat. The operating rod is connected to the first locking piece, and the operating rod is configured to pull the operating rod to drive the first locking piece to leave or enter the first locking hole.

4. The swing chassis device according to claim 3, characterized in that: A push-pull torsion spring is sleeved on the operating rod, one of the torsion spring arms of the push-pull torsion spring is fixed on the operating rod, and the other torsion spring arm of the push-pull torsion spring is arranged on the first locking piece. The push-pull torsion spring is configured so that the operating rod drives the first locking piece to move through the push-pull torsion spring.

5. The swing chassis device according to claim 4, characterized in that: The push-pull torsion spring has a bent portion, which is bent downward and abuts against the base. The base is provided with a convex portion, which is configured so that when the operating rod moves, the bent portion passes over the convex portion to allow the first locking piece to enter or leave the first locking hole.

6. The swing chassis device according to claim 2, characterized in that: An operating rod is provided on the base or the first swing seat, and the operating rod is selectively rotatable; the operating rod is arranged along the left and right direction, and the first locking piece is arranged along the front and rear direction. The operating rod is connected to the first locking piece, and the operating rod is configured to rotate to drive the first locking piece to leave or enter the first locking hole.

7. The swing chassis device according to claim 6, characterized in that: A push-pull torsion spring is sleeved on the operating rod, one of the torsion spring arms of the push-pull torsion spring is fixed on the operating rod, and the other torsion spring arm of the push-pull torsion spring is arranged on the first locking piece. The push-pull torsion spring is configured so that the operating rod drives the first locking piece to move through the push-pull torsion spring.

8. The swing chassis device according to claim 6, characterized in that: A gear seat is provided on the base or the first swing seat, a synchronously rotating gear member is sleeved on the operating rod, a gear slot is provided on the gear seat, and the gear member is inserted in the gear slot; the gear slot has a first gear position and a second gear position, a convex portion is provided between the first gear position and the second gear position, the convex portion protrudes toward the gear slot, and the gear member switches between the first gear position and the second gear position by crossing the convex portion.

9. The swing chassis device according to claim 6, characterized in that: There are two first locking members, which are symmetrically arranged on both sides of the first rotating shaft.

10. The swing chassis device according to claim 1, characterized in that: The second swing seat includes two end plates located on the left and right sides, the second rotating shaft is arranged in the middle of the end plates and passes through the first swing seat and the two end plates, one of the end plates is provided with a rotating groove on the side of the second rotating shaft, and the other end plate is correspondingly provided with a second locking hole; the first swing seat and the second swing seat are unlocked or locked by a second locking piece for relative rotation between the second swing seat and the first swing seat, a second mounting hole is arranged on the first swing seat, the second locking piece is inserted in the rotating groove and the second mounting hole, the second locking piece is selectively slidably arranged on the first swing seat and the second swing seat along the left and right directions, the second locking piece is configured to selectively enter the second locking hole to lock the first swing seat and the second swing seat or selectively leave the second locking hole to unlock the second swing seat and the first swing seat; when the second locking piece leaves the second locking hole and the second swing seat rotates relative to the first swing seat, the second locking piece moves in the rotating groove.

11. The swing chassis device according to claim 1, characterized in that: The elastic buffer is a spring. There are at least two springs, and the springs are symmetrically distributed on both sides of the first rotating shaft.

12. The swing chassis device according to claim 1, characterized in that: The elastic buffer is a buffer return torsion spring, and the buffer return torsion spring is sleeved on the first rotating shaft.

13. The swing chassis device according to claim 1, characterized in that: A back connecting piece is arranged on the first swing seat, and the back connecting piece is configured to be connected with the chair back and swing along with the swing of the first swing seat.

14. The swing chassis device according to claim 13, characterized in that: The front end of the back connecting member is rotatably connected to the first swing seat; the back connecting member and the second swing seat are linked via a linkage structure, and the linkage structure is configured to drive the second swing seat to swing back and forth when the back connecting member rotates on the first swing seat.

15. The swing chassis device according to claim 14, characterized in that: The linkage structure includes a sliding rotating member and a sliding rotating groove. A connecting seat extends obliquely downward from the rear of the second swing seat. The connecting seat is connected to the sliding rotating member. The sliding rotating member is arranged in the left and right directions. The sliding rotating groove is opened on the back connecting member. The sliding rotating member is inserted into the sliding rotating groove. When the back connecting member rotates on the first swing seat, the sliding rotating member and the sliding rotating groove move and rotate relative to each other, driving the second swing seat to swing back and forth.

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