Chair structure

Abstract

To provide a chair structure that can promote blood circulation, help burn calories, and achieve core exercise. [Solution] A chair structure 100 for a user to sit on and step on, comprising a pivotal seat 110, a support rod 120 pivoted to the pivotal seat, a cushion 130 pivoted to one end of the support rod for the user to sit on, and a foot pedal 140 connected to the other end of the support rod for the user to step on, and when the user steps on the foot pedal, the cushion moves back and forth between a first position and a second position via the support rod, or maintains a fixed-point balance. This encourages the user to move lightly through a seesaw-like reciprocating motion created by stepping on or releasing the foot, and by stepping appropriately, the foot pedal can be lifted off the ground, maintaining a balanced state without changing the movement.

Description

[Technical Field]

[0001] The present disclosure relates to a chair structure, and more particularly to a chair structure capable of see-saw reciprocating motion or fixed-point balancing motion formed by stepping on or releasing a foot. [Background technology]

[0002] Traditional chairs generally have simple structures and primarily provide basic seating functions, lacking sufficient dynamic characteristics. In modern work environments, many people are required to sit at their desks for long periods of time, and this static posture can lead to numerous health problems. Research has shown that prolonged sitting can lead to the accumulation of abdominal fat, increase the risk of metabolic diseases, and cause discomfort such as spinal pain and muscle fatigue.

[0003] Sitting for long periods of time not only affects abdominal fat distribution but also overall blood circulation. When the body maintains the same posture for a long time, muscles do not move sufficiently, which can lead to muscle atrophy and tightness. In addition, a fixed sitting posture puts uneven pressure on the spine, increasing the risk of problems such as back pain and neck pain. This situation is particularly noticeable in office environments, and the impact on health cannot be ignored. Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, an object of the present disclosure is to provide a chair structure that encourages users to move lightly through a seesaw-like reciprocating motion created by stepping on or releasing their feet, thereby promoting blood circulation and helping to burn calories. The user can effectively change the center of gravity of the body by moving their feet while sitting, promoting abdominal muscle movement and reducing fat accumulation. [Means for solving the problem]

[0005] According to one embodiment of the structural aspects of the present disclosure, there is provided a chair structure for a user to sit on and step on, comprising a pivotal seat, a support rod pivotally attached to the pivotal seat, a cushion section pivotally attached to one end of the support rod and for the user to sit on, and a foot pedal connected to the other end of the support rod and for the user to step on, wherein when the foot pedal is stepped on by the user, the cushion section moves back and forth or maintains fixed-point balance between a first position and a second position via the support rod.

[0006] Another example of the above embodiment is as follows: The chair structure further includes a buffer unit pivotally mounted on the pivot seat, the buffer unit including a buffer seat pipe including a top abutment surface and a bottom abutment surface opposite to the top abutment surface, a buffer shaft movably mounted through the buffer seat pipe and including a first buffer shaft portion and a second buffer shaft portion connected to the first buffer shaft portion, and a buffer soft cushion through which the first buffer shaft portion passes.

[0007] Another example of the above embodiment is as follows: When the foot pedal is stepped on by the user and the cushion part is moved to the first position via the support rod, the second buffer axis portion of the buffer shaft abuts against the bottom abutment surface of the buffer seat tube, and the buffer soft cushion is driven and compressed, thereby abutting against the top abutment surface of the buffer seat tube. When the foot pedal is stepped on by the user and the cushion part is moved to the second position via the support rod, the second buffer axis portion of the buffer shaft does not abut against the bottom abutment surface of the buffer seat tube, and thereby the buffer soft cushion is separated from the top abutment surface of the buffer seat tube.

[0008] Another example of the above embodiment is as follows: The chair structure further includes an adjustable hydraulic shock absorber unit pivotally mounted on the pivot seat, the adjustable hydraulic shock absorber unit including: a hydraulic outer pipe; a hydraulic inner pipe having a hydraulic stopper surface located in the hydraulic outer pipe and penetrating the hydraulic outer pipe; a shaft body movably penetrating the hydraulic inner pipe; and a hydraulic shaft including a shaft head connected to the shaft body and accommodated in the hydraulic outer pipe and penetrating the hydraulic inner pipe.

[0009] Another example of the above embodiment is as follows: When the foot pedal is stepped on by a user and the cushion part is set to a first position via the support rod, the shaft body is embedded in the hydraulic inner pipe and the shaft head is close to the hydraulic stopper surface of the hydraulic inner pipe, and when the foot pedal is stepped on by a user and the cushion part is set to a second position via the support rod, the shaft body protrudes from the hydraulic inner pipe and the shaft head is separated from the hydraulic stopper surface of the hydraulic inner pipe.

[0010] According to another embodiment of the structural aspects of the present disclosure, there is provided a chair structure for a user to sit on and step on, comprising: a pivotal seat; a support rod pivotally attached to the pivotal seat; a cushion section pivotally attached to one end of the support rod and for the user to sit on; a foot step section connected to the other end of the support rod and for the user to step on; and a buffer member connected between the cushion section and the pivotal seat, wherein when the foot step section is stepped on by the user, the cushion section moves back and forth between a first position and a second position via the support rod, and the buffer member is used to reduce the descent speed of the cushion section when the foot step section moves from the second position to the first position.

[0011] Other examples of the above-described embodiment are as follows: The buffer member is a buffer unit pivotally mounted on a pivot seat, and the buffer unit includes a buffer seat pipe including a top abutment surface and a bottom abutment surface opposite to the top abutment surface, a buffer shaft movably installed through the buffer seat pipe and including a first buffer shaft portion and a second buffer shaft portion connected to the first buffer shaft portion, and a buffer soft cushion through which the first buffer shaft portion passes.

[0012] Another example of the above embodiment is as follows: When the foot pedal is stepped on by the user and the cushion part is moved to the first position via the support rod, the second buffer axis portion of the buffer shaft abuts against the bottom abutment surface of the buffer seat tube, and the buffer soft cushion is driven and compressed, so that the buffer soft cushion abuts against the top abutment surface of the buffer seat tube; when the foot pedal is stepped on by the user and the cushion part is moved to the second position via the support rod, the second buffer axis portion of the buffer shaft does not abut against the bottom abutment surface of the buffer seat tube, so that the buffer soft cushion moves away from the top abutment surface of the buffer seat tube.

[0013] Another example of the above embodiment is as follows: The buffer member is an adjustable hydraulic buffer unit pivotally mounted on a pivot seat, and the adjustable hydraulic buffer unit includes a hydraulic outer pipe, a hydraulic inner pipe having a hydraulic stopper surface located in the hydraulic outer pipe and penetrating the hydraulic outer pipe, a shaft core movably penetrating the hydraulic inner pipe, and a hydraulic shaft core connected to the shaft core and including a shaft head housed in the hydraulic outer pipe and penetrating the hydraulic inner pipe.

[0014] Another example of the above embodiment is as follows: When the foot pedal is stepped on by a user and the cushion part is set to a first position via the support rod, the shaft body is embedded in the hydraulic inner pipe and the shaft head is close to the hydraulic stopper surface of the hydraulic inner pipe, and when the foot pedal is stepped on by a user and the cushion part is set to a second position via the support rod, the shaft body protrudes from the hydraulic inner pipe and the shaft head is separated from the hydraulic stopper surface of the hydraulic inner pipe.

[0015] According to another embodiment of the structural aspects of the present disclosure, there is provided a chair structure for a user to sit on and step on, comprising: a pivotal seat; a support rod pivotally attached to the pivotal seat; a cushion section pivotally attached to one end of the support rod and for the user to sit on; a foot pedal connected to the other end of the support rod and for the user to step on; a buffer unit connected between the cushion section and the pivotal seat; and an adjustable hydraulic buffer unit connected between the cushion section and the pivotal seat, wherein when the foot pedal is stepped on by the user, the cushion section moves back and forth between a first position and a second position via the support rod, and when the foot pedal moves from the second position to the first position, the buffer unit and the adjustable hydraulic buffer unit are used to reduce the descent speed of the cushion section.

[0016] Other examples of the above embodiment are as follows: the shock absorber unit includes a shock absorber pipe pivotally mounted on the pivot seat and including a top abutment surface and a bottom abutment surface opposite to the top abutment surface, a shock absorber shaft movably installed through the shock absorber pipe and including a first shock absorber shaft portion and a second shock absorber shaft portion connected to the first shock absorber shaft portion, and a shock absorber soft cushion for the first shock absorber shaft portion to pass through, and the adjustable hydraulic shock absorber unit is pivotally mounted on the pivot seat and includes a hydraulic outer pipe, a hydraulic inner pipe having a hydraulic stopper surface located in the hydraulic outer pipe and passing through the hydraulic outer pipe, a shaft body movably installed through the hydraulic inner pipe, and a shaft head connected to the shaft body and accommodated in the hydraulic outer pipe, and passing through the hydraulic inner pipe.

[0017] Another example of the above embodiment is as follows: when the foot pedal is stepped on by the user and the cushion part is placed in a first position via the support rod, the second buffer shaft part of the buffer shaft abuts against the bottom abutment surface of the buffer seat tube, and the buffer soft cushion is driven and compressed, so that the buffer soft cushion abuts against the top abutment surface of the buffer seat tube; at the same time, the shaft body part of the adjustable hydraulic buffer unit is embedded in the hydraulic inner tube, and the shaft head part is close to the hydraulic stopper surface of the hydraulic inner tube; when the foot pedal is stepped on by the user and the cushion part is placed in a second position via the support rod, the second buffer shaft part of the buffer shaft does not abut against the bottom abutment surface of the buffer seat tube, so that the buffer soft cushion moves away from the top abutment surface of the buffer seat tube; at the same time, the shaft body part of the adjustable hydraulic buffer unit protrudes from the hydraulic inner tube, and the shaft head part moves away from the hydraulic stopper surface of the hydraulic inner tube. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective schematic view of a chair structure according to a first embodiment of the present disclosure; FIG. [Figure 2] 2 is an exploded schematic view of the chair structure according to FIG. 1; FIG. [Figure 3] 2 is a schematic side view of the chair structure according to FIG. 1 in a first position. [Figure 4A] 4 is a partial enlarged view of the adjustable hydraulic damping unit of the chair structure according to FIG. 3. FIG. [Figure 4B] 4 is a partial enlarged view of the cushioning unit of the chair structure according to FIG. 3; [Figure 5] 2 is a side view of the chair structure according to FIG. 1 in a second position; FIG. [Figure 6A] FIG. 6 is a partial enlarged view of the adjustable hydraulic damping unit of the chair structure according to FIG. 5. [Figure 6B] FIG. 6 is a partial enlarged view of the buffer unit of the chair structure according to FIG. 5; [Figure 7] FIG. 10 is a schematic side view of a chair structure according to a second embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, several embodiments of the present disclosure will be described with reference to the drawings. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not used to limit the present disclosure. That is, in some embodiments of the present disclosure, these practical details are not necessary. In addition, to simplify the drawings, some well-known and conventional structures and elements are simply and schematically illustrated in the drawings. Furthermore, duplicated elements may be labeled with the same numerals.

[0020] In this specification, when an element (or unit, module, etc.) is "connected / coupled" to another element, this may mean that the element is directly connected / coupled to the other element, or that the element is indirectly connected / coupled to the other element, i.e., the other element is between the element and the other element. On the other hand, when an element is explicitly stated to be "directly connected / coupled" to another element, this only indicates that the other element is not between the element and the other element. Terms such as "first," "second," and "third" are used merely to describe different elements and do not limit the elements themselves, so a "first element" may be read as a "second element." Furthermore, the combinations of elements / units / circuits in this specification are not general, well-known, usual, or known combinations in this field. Whether the elements / units / circuits themselves are known does not determine whether the combinations are easily achievable by a person skilled in the art.

[0021] Please refer to Figures 1, 2, 3, 4A and 4B. Figure 1 is a perspective schematic view of a chair structure 100 according to a first embodiment of the present disclosure, Figure 2 is an exploded schematic view of the chair structure 100 according to Figure 1, Figure 3 is a side schematic view of the chair structure 100 according to Figure 1 at a first position P1, Figure 4A is a partial enlarged view of an adjustable hydraulic shock absorber unit 160 of the chair structure 100 according to Figure 3, and Figure 4B is a partial enlarged view of a shock absorber unit 150 of the chair structure 100 according to Figure 3. The chair structure 100 is used for a user (not shown) to sit on and step on. The chair structure 100 includes a pivot seat 110, a support rod 120, a cushion portion 130, a foot portion 140, a shock absorber unit 150 and an adjustable hydraulic shock absorber unit 160.

[0022] The pivot seat 110 includes a pivot portion 111, a base tube portion 112, and four roller portions 113 (four in the first embodiment, but not limited to this). The base tube portion 112 includes a first base tube (not separately shown in the drawings), a second base tube (not separately shown in the drawings), and a third base tube (not separately shown in the drawings). One end of the second base tube is fixed to the first base tube. One end of the third base tube is fixed to the first base tube. The first roller portion 113 and the second roller portion 113 are respectively provided at both ends of the first base tube, the third roller portion 113 is provided at the other end of the second base tube, and the fourth roller portion 113 is provided on the third base tube. Thus, the installation of the base tube portions 112 forms a strong support structure, strengthening the stability of the entire chair structure 100 and ensuring safety and reliability during use. Furthermore, the provision of the four roller parts 113 further enhances the mobility and convenience of the chair, allowing the user to move it easily.

[0023] The support rod 120 is pivotally mounted on the pivot seat 110 and includes a first support rod end 121, a second support rod end 122, and a support rod body 123. The first support rod end 121 is pivotally mounted on the cushion part 130. The second support rod end 122 is opposite to the first support rod end 121. The support rod body 123 connects the first support rod end 121 and the second support rod end 122 and is pivotally mounted on the pivot part 111 of the pivot seat 110. As a result, since the support rod body 123 is pivotally mounted on the pivot part 111, the support rod 120 can flexibly swing in response to a user's operation, producing a seesaw-like motion.

[0024] The cushion unit 130 includes a lifting member 131, a pivot member 132, an adjustment member 133, a cushion member 134, and a backrest member 135. The lifting member 131 is provided below the cushion member 134. When a user moves the adjustment member 133, the lifting member 131 rises and falls due to changes in gas pressure, allowing the height of the cushion unit 130 to be adjusted up and down. The pivot member 132 is fixed to the outer surface of the lifting member 131 and is used to pivotally mount the first support rod end portion 121. One end of the adjustment member 133 is connected between the lifting member 131 and the cushion member 134. The cushion member 134 connects the lifting member 131 and the backrest member 135 and allows the user to sit on it. The side edge of the cushion member 134 has a cushion curved surface (not shown separately in the drawings) facing the support rod 120. This allows the cushion curved surface to better fit the curves of the user's body, particularly the position of the popliteal fossa, improving the naturalness of the sitting posture and improving overall comfort.

[0025] In the first embodiment, the chair structure 100 may include a plug 170. A stopper hole 1321 is drilled in the pivot member 132. The plug 170 is inserted through the stopper hole 1321, thereby controlling the displacement of the cushion member 130. When the plug 170 is pulled outward and the stopper point (not shown in the drawings) disengages from the stopper hole 1321, the stopper point in the pivot member 132 disengages from the stopper hole 1321, making the cushion member 130 freely adjustable. The user can adjust the height of the cushion member 130 as needed to meet different sitting posture needs and improve ergonomic comfort. When the plug 170 is pushed inward and the stopper point engages with the stopper hole 1321, the cushion member 130 is locked in a fixed position and prevented from moving up or down. This prevents the cushion member 130 from sliding unintentionally during use and improves stability and safety.

[0026] The footrest 140 is connected to the second support rod end 122 of the support rod 120, and is provided with a plurality of anti-slip mats (not shown in the drawings) on the bottom surface. The arrangement of the anti-slip mats provides a good grip, strengthens the stability when using the chair structure 100, and improves the safety of the user.

[0027] The buffer unit 150 is pivotally mounted on the pivot seat 110, positioned below the support rod body 123, and includes a buffer seat pipe 151, a buffer shaft 152, and a buffer soft cushion 153. The buffer seat pipe 151 is pivotally mounted on the pivot part 111 and includes a top abutment surface 1511 and a bottom abutment surface 1512 opposite the top abutment surface 1511. The bottom abutment surface 1512 is the bottom surface of the groove of the buffer seat pipe 151, and the top abutment surface 1511 is the opening end surface of the buffer seat pipe 151. The buffer shaft 152 is pivotally mounted on the pivot member 132, movably extends through the buffer seat pipe 151, and includes a first buffer shaft portion 1521 and a second buffer shaft portion 1522. The first buffer shaft portion 1521 is connected to the second buffer shaft portion 1522. The buffer soft cushion 153 is provided to penetrate the first buffer shaft portion 1521. In the present disclosure, the buffer soft cushion 153 is a buffer rubber, but is not limited thereto and may be made of other materials, such as polyurethane (PU) or silicone. As a result, the installation of the buffer unit 150 can effectively absorb the impact generated when the cushion portion 130 descends, thereby reducing the impact on the user and the risk of injury. This not only enhances the safety of the user but also further improves the overall comfort.

[0028] The adjustable hydraulic shock absorber unit 160 is pivotally mounted on the pivot seat 110 and located on one side of the shock absorber unit 150. It includes an outer hydraulic pipe 161, an inner hydraulic pipe 162, and a hydraulic shaft 163. The outer hydraulic pipe 161 is pivotally mounted on the pivot mounting part 111. One end of the inner hydraulic pipe 162 penetrates the outer hydraulic pipe 161, and the other end penetrates the pivot member 132. The inner hydraulic pipe 162 has a hydraulic stopper surface 1621, which is the end face of the inner hydraulic pipe 162 and is located within the outer hydraulic pipe 161. The hydraulic shaft 163 penetrates the inner hydraulic pipe 162 and includes a shaft body 1631 and a shaft head 1632. The shaft body 1631 is connected to the shaft head 1632 and is movably mounted on the inner hydraulic pipe 162. The shaft head 1632 is housed in the hydraulic outer tube 161. Therefore, the arrangement of the adjustable hydraulic buffer unit 160 can automatically adjust according to different load conditions (user weight) and achieve precise buffer control, allowing the user to enjoy a higher level of comfort and safety during operation, and can provide a stable and sustained buffer effect, especially in applications that require precise control of impact, effectively reducing the risk of impact and thereby significantly reducing the chance of accidents and injuries.

[0029] Please refer to Figures 1, 3, and 5. Figure 5 is a side view of the chair structure 100 in Figure 1 at the second position P2. When the foot pedal 140 is stepped on by a user, the cushion 130 moves back and forth between the first position P1 and the second position P2 via the support rod 120. This encourages the user to move lightly through the seesaw-like reciprocating motion created by stepping on the foot (applying force) or releasing the foot (not applying force), which can promote blood circulation and help burn calories.

[0030] 3, 4A, and 4B for details. When the foot pedal 140 is not stepped on by the user or the stepping force is less than the user's weight, and the cushion unit 130 is placed at the first position P1 via the support rod 120, the second buffering buffering buffer portion 1522 of the buffering buffering buffer portion 152 abuts against the bottom abutment surface 1512 of the buffering buffer tube 151, and the buffering buffering soft cushion 153 is driven and compressed, so that the buffering buffering soft cushion 153 abuts against the top abutment surface 1511 of the buffering buffer tube 151. At the same time, the axle body 1631 of the adjustable hydraulic buffer unit 160 is embedded in the hydraulic inner tube 162, and the axle head 1632 is close to the hydraulic stopper surface 1621 of the hydraulic inner tube 162.

[0031] Please refer to Figures 5, 6A, and 6B simultaneously. Figure 6A is a partial enlarged view of the adjustable hydraulic shock absorber unit 160 of the chair structure 100 shown in Figure 5, and Figure 6B is a partial enlarged view of the shock absorber unit 150 of the chair structure 100 shown in Figure 5. When the foot pedal 140 is stepped on by the user and the cushion unit 130 is placed in the second position P2 via the support rod 120, the second shock absorber shaft portion 1522 of the shock absorber shaft 152 does not abut against the bottom abutment surface 1512 of the shock absorber seat tube 151, and the shock absorber soft cushion 153 moves away from the top abutment surface 1511 of the shock absorber seat tube 151. At the same time, the shaft body 1631 of the adjustable hydraulic shock absorber unit 160 protrudes from the inner hydraulic tube 162, and the shaft head portion 1632 moves away from the hydraulic stopper surface 1621 of the inner hydraulic tube 162.

[0032] As a result, the cooperation between the buffer unit 150 and the adjustable hydraulic buffer unit 160 can effectively reduce the descent speed of the cushion unit 130 when the foot pedal 140 moves from the second position P2 to the first position P1, providing precise speed control and preventing sudden impacts. This arrangement not only improves user safety and reduces risks during operation, but also enhances comfort and prevents discomfort caused by sudden descent.

[0033] Please refer to FIGS. 1 and 7. FIG. 7 is a schematic side view of a chair structure 100a according to a second embodiment of the present disclosure. The main structural arrangement of this embodiment is the same as that of the first embodiment, except that the pivotal seat 110a does not have a buffering member (the buffering unit 150 and the adjustable hydraulic buffering unit 160 mentioned in the first embodiment). When the footrest 140a is stepped on by the user, the cushion 130a can be moved back and forth between a first position (not shown in the drawings) and a second position (not shown in the drawings) via the support rod 120a. Fixed-point balance P3 can also be achieved. Specifically, fixed-point balance P3 refers to the chair structure 100a being able to remain stable in a specific position or state by appropriately stepping on the footrest 140a. Fixed-point balance P3 is achieved by the force of the user's abdominal core muscles. The specific position is between the first and second positions. During the movement of the cushion part 130a, the user not only passively adapts to the change but also actively fine-tunes with the force of the core muscles to ensure the stability of the body and keep the cushion part 130a in the required position. This balancing process emphasizes the control and coordination of the user's body, avoids dependence on machines or external support, and enhances flexibility and comfort during movement.

[0034] In another embodiment, the chair structure is not provided with an adjustable hydraulic shock absorber unit, and the other elements and structural arrangements are all the same or similar to those of the first embodiment, so they will not be described again, except that only the shock absorber unit is pivotally mounted on the pivotal seat.

[0035] In another embodiment, the chair structure is not provided with a shock absorber unit, and the other elements and structural arrangements are all the same or similar to those of the first embodiment, so they will not be described again, except that the pivotal seat is only provided with an adjustable hydraulic shock absorber unit.

[0036] As described above, the chair structure of the present disclosure has the following advantages: 1. The structure of the present disclosure encourages users to move lightly through a seesaw-like reciprocating motion created by stepping on or releasing their feet, thereby promoting blood circulation and helping to burn calories. 2. While sitting, users can effectively shift their body's center of gravity by moving their feet, which further promotes abdominal muscle movement and contributes to reducing fat accumulation. 3. It not only improves users' physical activity, but also improves their fitness level during daily office activities and breaks, reducing the health risks associated with prolonged sitting.

[0037] The present disclosure has been disclosed in the above-described embodiments, but the above-described embodiments are not intended to limit the present disclosure, and a person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on that defined by the scope of the utility model registration claims attached below. [Explanation of symbols]

[0038] 100, 100a: Chair structure 110, 110a: Pivot seat 111: Pivot joint 112: Bass section 113: Roller section 120, 120a: Support rod 121: First support rod end 122: Second support rod end 123: Support rod body 130, 130a: Cushion part 131: Lifting member 132: Pivot member 1321: Stopper hole 133: Adjustment member 134: Cushion member 135: Backrest member 140, 140a: Foot pedal 150: Buffer unit 151:Buffer seat pipe 1511: Abutting top surface 1512: Bottom of the butt 152:Buffer axis center 1521: 1st buffer shaft center 1522:Second buffer shaft center 153: Soft cushion 160: Adjustable hydraulic shock absorber unit 161: Hydraulic outer pipe 162: Hydraulic inner pipe 1621: Hydraulic stopper surface 163: Hydraulic shaft center 1631: Shaft center body 1632: Axis head 170: Plug P1: 1st position P2: 2nd position P3: Fixed point balance

Claims

1. A chair structure for a user to sit on and step on, Pivot seating and a support rod pivotally mounted on the pivot seat; a cushion portion pivotally attached to one end of the support rod for a user to sit on; a foot pedal connected to the other end of the support rod for the user to step on; Equipped with A chair structure in which the foot pedal portion is stepped on by the user, and the cushion portion moves back and forth between a first position and a second position or maintains fixed-point balance via the support rod.

2. Further provided is a buffer unit pivotally mounted on the pivot seat, The buffer unit comprises: a shock absorber tube including a top abutment surface and a bottom abutment surface facing the top abutment surface; a buffer shaft that is movably installed through the buffer seat pipe and includes a first buffer shaft portion and a second buffer shaft portion connected to the first buffer shaft portion; a buffer soft cushion through which the first buffer shaft portion passes; 10. The chair structure of claim 1, comprising:

3. When the foot pedal is stepped on by the user and the cushion part is brought to the first position via the support rod, the second buffer shaft part of the buffer shaft comes into contact with the bottom abutment surface of the buffer seat pipe, and the buffer soft cushion is driven and compressed, whereby the buffer soft cushion comes into contact with the top abutment surface of the buffer seat pipe; 3. The chair structure according to claim 2, wherein when the foot pedal is stepped on by the user and the cushion portion is brought to the second position via the support rod, the second buffer axis portion of the buffer axis is not abutted against the bottom abutment surface of the buffer seat pipe, thereby causing the buffer soft cushion to move away from the top abutment surface of the buffer seat pipe.

4. Further, an adjustable hydraulic shock absorber unit is pivotally mounted on the pivot seat, The adjustable hydraulic shock absorber unit comprises: A hydraulic outer pipe; a hydraulic inner pipe having a hydraulic stopper surface located within the hydraulic outer pipe and extending through the hydraulic outer pipe; a hydraulic shaft including a shaft body portion movably inserted into the hydraulic inner pipe and a shaft head portion connected to the shaft body portion and accommodated in the hydraulic outer pipe, the hydraulic shaft being inserted into the hydraulic inner pipe; 10. The chair structure of claim 1, comprising:

5. When the foot pedal is stepped on by the user and the cushion is placed in the first position via the support rod, the shaft body is embedded in the hydraulic inner pipe, and the shaft head is close to the hydraulic stopper surface of the hydraulic inner pipe, 5. The chair structure according to claim 4, wherein when the foot pedal is stepped on by the user and the cushion is moved to the second position via the support rod, the shaft body protrudes from the hydraulic inner tube and the shaft head separates from the hydraulic stopper surface of the hydraulic inner tube.

6. A chair structure for a user to sit on and step on, Pivot seating and a support rod pivotally mounted on the pivot seat; a cushion portion pivotally attached to one end of the support rod for a user to sit on; a foot pedal connected to the other end of the support rod for the user to step on; a buffer member connected between the cushion portion and the pivot seat; Equipped with A chair structure in which the foot pedal is stepped on by the user to move the cushion part back and forth between a first position and a second position via the support rod, and when the foot pedal moves from the second position to the first position, the buffer member is used to reduce the descent speed of the cushion part.

7. the buffer member is a buffer unit pivotally mounted on the pivot seat, The buffer unit comprises: a shock absorber tube including a top abutment surface and a bottom abutment surface facing the top abutment surface; a buffer shaft that is movably installed through the buffer seat pipe and includes a first buffer shaft portion and a second buffer shaft portion connected to the first buffer shaft portion; a buffer soft cushion through which the first buffer shaft portion passes; 7. The chair structure of claim 6, comprising:

8. When the foot pedal is stepped on by the user and the cushion part is brought to the first position via the support rod, the second buffer axis part of the buffer axis abuts against the bottom abutment surface of the buffer seat pipe, and the buffer soft cushion is driven and compressed, whereby the buffer soft cushion abuts against the top abutment surface of the buffer seat pipe; 8. The chair structure according to claim 7, wherein when the footrest is stepped on by the user and the cushion portion is brought to the second position via the support rod, the second buffer axis portion of the buffer axis does not abut the bottom abutment surface of the buffer seat pipe, thereby separating the buffer soft cushion from the top abutment surface of the buffer seat pipe.

9. the buffer member is an adjustable hydraulic buffer unit pivotally mounted on the pivot seat; The adjustable hydraulic shock absorber unit comprises: A hydraulic outer pipe; a hydraulic inner pipe having a hydraulic stopper surface located within the hydraulic outer pipe and extending through the hydraulic outer pipe; a hydraulic shaft including a shaft body portion movably inserted into the hydraulic inner pipe and a shaft head portion connected to the shaft body portion and accommodated in the hydraulic outer pipe, the hydraulic shaft being inserted into the hydraulic inner pipe; 7. The chair structure of claim 6, comprising:

10. When the foot pedal is stepped on by the user and the cushion is placed in the first position via the support rod, the shaft body is embedded in the hydraulic inner pipe and the shaft head is close to the hydraulic stopper surface of the hydraulic inner pipe, 10. The chair structure according to claim 9, wherein when the foot pedal is stepped on by the user and the cushion is moved to the second position via the support rod, the shaft body protrudes from the hydraulic inner tube and the shaft head separates from the hydraulic stopper surface of the hydraulic inner tube.

11. A chair structure for a user to sit on and step on, Pivot seating and a support rod pivotally mounted on the pivot seat; a cushion portion pivotally attached to one end of the support rod for a user to sit on; a foot pedal connected to the other end of the support rod for the user to step on; a buffer unit connected between the cushion portion and the pivot seat; an adjustable hydraulic shock absorber unit connected between the cushion portion and the pivot seat; Equipped with A chair structure in which the foot pedal is stepped on by the user, causing the cushion to move back and forth between a first position and a second position via the support rod, and when the foot pedal moves from the second position to the first position, the buffer unit and the adjustable hydraulic buffer unit are used to reduce the descent speed of the cushion.

12. The buffer unit is pivotally mounted on the pivot seat, a shock absorber tube including a top abutment surface and a bottom abutment surface facing the top abutment surface; a buffer shaft that is movably installed through the buffer seat pipe and includes a first buffer shaft portion and a second buffer shaft portion connected to the first buffer shaft portion; a buffer soft cushion through which the first buffer shaft portion passes; Including, The adjustable hydraulic shock absorber unit is pivotally mounted on the pivot seat; A hydraulic outer pipe; a hydraulic inner pipe having a hydraulic stopper surface located within the hydraulic outer pipe and extending through the hydraulic outer pipe; a hydraulic shaft including a shaft body portion movably inserted into the hydraulic inner pipe and a shaft head portion connected to the shaft body portion and accommodated in the hydraulic outer pipe, the hydraulic shaft being inserted into the hydraulic inner pipe; The chair structure of claim 11, comprising:

13. When the foot pedal is stepped on by the user and the cushion part is brought to the first position via the support rod, the second buffer shaft part of the buffer shaft abuts against the bottom abutment surface of the buffer seat pipe, and the buffer soft cushion is driven and compressed, so that the buffer soft cushion abuts against the top abutment surface of the buffer seat pipe, and at the same time, the shaft body part of the adjustable hydraulic buffer unit is embedded in the hydraulic inner pipe, and the shaft head part is close to the hydraulic stopper surface of the hydraulic inner pipe; 13. The chair structure of claim 12, wherein when the foot pedal is stepped on by the user and the cushion part is placed in the second position via the support rod, the second buffer shaft part of the buffer shaft is not in contact with the bottom abutment surface of the buffer seat pipe, thereby causing the buffer soft cushion to move away from the top abutment surface of the buffer seat pipe, and at the same time, the shaft body part of the adjustable hydraulic buffer unit protrudes from the hydraulic inner pipe, and the shaft head part moves away from the hydraulic stopper surface of the hydraulic inner pipe.

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