Air rod and lifting seat

Abstract

The utility model provides an air rod and a lifting seat. The air rod comprises a thick cylinder with a through hole; the guide column is inserted into the thick cylinder to reciprocate up and down, the thin cylinder is inserted into the guide column, and the valve device is inserted into the top of the inner surface of the thin cylinder and controls the moving direction of gas. A piston rod comprising a piston is inserted into the middle of the thin cylinder, the lower end of the piston rod is fixed to the outer side of the lower end of the thick cylinder, and a supporting effect is provided when the guide column moves up and down. A guide pillar sleeve for guiding the guide pillar to move up and down is arranged between the thick cylinder and the guide pillar, and the device is characterized in that an O-shaped ring is inserted and mounted at the top of the inner surface of the guide pillar sleeve. The lifting seat comprises a seat, a backrest, a seat chassis and the air rod, and the seat chassis is mounted at the top end of the air rod. After the guide pillar is arranged in the guide pillar sleeve, when the guide pillar moves up and down, the phenomenon that the guide pillar is clamped or shaken can be prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of lifting seats, and relates to an improvement of a gas rod for adjusting the height and installed on chairs and the like. Specifically, it relates to a gas rod and a lifting seat. Background Art

[0002] Generally, when most office workers sit in an office chair to handle business in front of a desk, a stable and comfortable posture can be achieved only when the height of the office chair is suitable for the desk and the user's feet can touch the ground completely after sitting on the office chair.

[0003] Therefore, current office chairs are all equipped with gas rods that can adjust the height of the seat at any time. These gas rods include a cylindrical thick tube and a guide post that supports the user's weight, and the guide post can adjust the height of the seat through lifting movement to suit the user's body type.

[0004] Figure 1 To show the sectional view of a conventional gas rod, Figure 2 To show the insertion Figure 1 The enlarged sectional view of the existing guide post sleeve device inserted into the thick tube of the gas rod. Referring to Figure 1 , the existing gas rod includes a thick tube 10 that forms its appearance, a guide post 20 that is inserted into the inside of the thick tube 10 and moves up and down, and a guide post sleeve I 30 that is inserted on the inner surface of the thick tube 10 to support the guide post 20 to avoid swaying left and right during the up and down movement.

[0005] In addition, for the gas rod, a thin tube 40 is installed inside the guide post 20, an air chamber 71 and an air chamber 72 for filling gas are formed inside the thin tube 40, a split pin 60 is mechanically connected to the adjusting rod (not shown) at the top of the guide post 20, a piston rod 81 including a piston 80 is installed inside the thin tube 40, and a valve 50 for controlling the up and down movement of the guide post 20 is installed at the top of the thin tube 40. The valve 50 enables the gas in the air chamber 71 and the air chamber 72 to flow through the air passage 70 through the opening and closing action of the split pin 60, realizing the up and down movement of the guide post 20.

[0006] The gas rod is operated by the flow of gas. Centered on the piston 80, the gas filled in the air chamber 71 and the air chamber 72 realizes the up and down movement of the guide post 20 under the action of the split pin 60 formed on the valve 50.

[0007] However, in the prior art of the gas rod, in order to ensure smooth sliding when the chair seat moves up and down, the guide column sleeve 30 made of synthetic resin material is forcibly inserted into the cylindrical thick cylinder 10, and then placed at room temperature for more than one day. After the insertion pressure is relieved, the inner surface of the guide column sleeve 130 is machined. At this time, according to the outer diameter size error of the guide column sleeve 30 inserted into the thick cylinder 10, the insertion pressure is different, resulting in irregular processing of the inner surface of the guide column sleeve 30. Then, when the guide column 20 is installed in the guide column sleeve 30 and moves up and down, it may get stuck or shake.

[0008] Therefore, how to design a gas rod and a lifting seat, which can prevent the guide post from getting stuck or shaking when the guide post is installed in the guide post sleeve and moves up and down; further, how to prevent the oil leakage after grease or liquid lubricant is applied to the inner surface of the guide post sleeve. This is a technical problem that needs to be solved urgently in the art. Utility Model Content

[0009] In order to solve the above problems in the prior art, the utility model provides a gas rod and a lifting seat. After the guide post is installed in the guide post sleeve, the guide post can be prevented from being stuck or shaking when moving up and down.

[0010] The purpose of this utility model is achieved through the following technical solutions:

[0011] A gas rod comprises: a thick tube with a through hole;

[0012] A guide column inserted into the thick cylinder for up and down reciprocating motion;

[0013] a thin cylinder inserted into the interior of the guide post; and,

[0014] A valve device inserted into the top of the inner surface of the capillary to control the direction of gas movement; and,

[0015] A piston rod including a piston inserted in the middle of the cylinder;

[0016] The lower end of the piston rod is fixed to the outer side of the lower end of the thick cylinder to provide support when the guide column moves up and down;

[0017] A guide post sleeve is provided between the thick cylinder and the guide post to guide the guide post to move up and down;

[0018] The invention is characterized in that an O-ring is inserted into and installed on the top of the inner surface of the guide column sleeve.

[0019] Improvement on the above technical solution: the guide column sleeve is made of synthetic resin, the O-ring is inserted into the top of the cylindrical inner surface of the guide column sleeve, and the mounting ring cover is inserted to prevent the O-ring from detaching outward.

[0020] Further improvement to the above technical solution: After fixing and combining the guide post sleeve to the thick cylinder, apply grease or liquid lubricating oil on the inner surface of the guide post sleeve.

[0021] Further improvement to the above technical solution: A buffer material for absorbing the impact force of the guide post descending along the piston rod is installed at the lower end of the thick cylinder. A bearing for absorbing the noise generated when the guide post rotates is installed below the buffer material. The bearing is installed and fixed on the outer circumferential surface of the piston rod, and the end of the piston rod is inserted with a fixing pin for fixation.

[0022] Further improvement to the above technical solution: An air path is formed between the guide post and the thin cylinder. The lower part inside the thin cylinder communicates with the air path and forms an opening support for the gas inlet and outlet holes. A gas seal for preventing gas leakage is provided below the opening support. There is also a flange made of buffer material below the gas seal for absorbing the impact force generated when the piston contacts the opening support.

[0023] Further improvement to the above technical solution: The valve device is installed above the thin cylinder inside the guide post. A fixing bracket for fixing the valve device is provided above the valve device. The center of the fixing bracket is penetrated and a part protrudes outward from the guide post to form an open pin.

[0024] A lift chair, comprising a seat, a backrest, a seat chassis and a gas rod, characterized in that the gas rod is the gas rod as described above, and the seat chassis is installed at the top of the gas rod.

[0025] Compared with the prior art, the present utility model has the following advantages and positive effects:

[0026] 1. When the gas rod in the present utility model is applied to a lift chair, the O-ring is installed in the guide post sleeve for use, which can prevent the phenomenon of being stuck or shaken, and the effect is also obvious;

[0027] 2. The present utility model can prevent various defects from occurring before and after the product leaves the factory due to manual processing. Thus, expensive processing equipment, processing time, processing technology and processing personnel costs can be saved, and the effect of cost reduction is remarkable;

[0028] 3. In order to achieve smooth sliding, the present utility model coats liquid lubricating oil on the guide post sleeve. The O-ring provided on the inner surface of the guide post sleeve in the present utility model can also prevent the appearance from being soiled by the liquid lubricating oil. Description of the Drawings

[0029] Figure 1 is a sectional view showing a conventional gas rod;

[0030] Figure 2 is Figure 1 a partial enlarged view of

[0031] Figure 3 is a sectional view of the gas rod equipped with a guide sleeve device in the embodiment of the present utility model;

[0032] Figure 4 is Figure 3 an enlarged view of the "GB" part in;

[0033] Figure 5 is an exploded perspective view of the guide rod and the bushing device in the embodiment of the present utility model.

[0034] Figures 3 - 5 The reference numerals in are: 100, gas rod; 110, thick cylinder; 120, guide post; 130, guide rod; 131, ring cover installation groove A; 132, O-ring installation surface; 133, guide hole; 134, flange; 135, support rib; 140, O-ring; 150, ring cover; 151, ring cover installation groove B; 152, ring cover installation protrusion; 160, thin cylinder; 161, open support; 162, air seal; 163, flange; 170, valve device; 171, fixed bracket; 172, split pin; 180, gas path; 181, upper air chamber; 182, lower air chamber; 190, piston; 191, piston rod; 192, buffer material; 193, bearing; 194, fixing pin. Detailed implementation manners

[0035] The present utility model will be further described in detail below with reference to the accompanying drawings:

[0036] First, the structure of the gas rod 100 equipped with the guide post sleeve GB of the present utility model will be described. As Figure 3 shown, the gas rod 100 can prevent the guide post sleeve GB inserted and assembled to the top inner surface of the cylindrical thick cylinder 110 and the guide post 120 inserted into the guide post sleeve GB from getting stuck or swaying left and right during the up and down lifting movement.

[0037] Refer to Figures 3 - 5 , a specific implementation manner of a gas rod of the present utility model includes: a thick cylinder 110 having a through hole, a guide post 120 inserted into the thick cylinder 110 for reciprocating up and down movement, a thin cylinder 160 inserted into the inside of the guide post 120, a valve device 170 inserted into the top inner surface of the thin cylinder 160 to control the gas movement direction, a piston rod 191 including a piston 190 inserted in the middle of the thin cylinder 160, the lower end of the piston rod 191 being fixed to the outside of the lower end of the thick cylinder 110 to provide a supporting effect when the guide post 120 moves up and down. Between the thick cylinder 110 and the guide post 120, a guide post sleeve GB for guiding the up and down movement of the guide post 120 is provided, and an O-ring 140 is inserted and installed on the top inner surface of the guide post sleeve GB.

[0038] Furthermore, the material of the above-mentioned guide bushing GB is synthetic resin. An O-ring 140 is inserted into the top of the cylindrical inner surface of the guide bushing GB, and a mounting ring cover 150 is inserted to prevent the O-ring 140 from disengaging outward.

[0039] Still further, after the guide bushing GB is fixedly coupled to the thick cylinder 110, a lubricating grease or liquid lubricating oil is applied to the inner surface of the guide bushing GB.

[0040] Yet further, the piston 190 is mounted on the outer circumferential surface above the piston rod 191. A cushioning material 192 for absorbing the impact force of the guide post 120 descending along the piston rod 191 is installed at the lower end of the thick cylinder 110. A bearing 193 for absorbing the noise generated when the guide post 120 rotates is installed below the cushioning material 192. The bearing 193 is fixedly mounted on the outer circumferential surface of the piston rod 191, and the end of the piston rod 191 is inserted with a fixing pin 194 for fixation.

[0041] Even further, an air passage 180 is formed between the guide post 120 and the thin cylinder 160. The lower part inside the thin cylinder 160 communicates with the air passage 180, and an opening support 161 for forming an opening of a gas inlet and outlet hole is formed. Below the opening support 161 is an air seal 162 for preventing gas leakage. Below the air seal 162, there is also a flange 163 made of a cushioning material for absorbing the impact force generated when the piston 190 contacts the opening support 161.

[0042] Specifically: Above the thin cylinder 160 installed inside the guide post 120, a valve device 170 is installed. Above the valve device 170 is a fixing bracket 171 for fixing the valve device 170. The center of the fixing bracket 171 is penetrated and a part protrudes outward from the guide post 120 to form an open pin 172.

[0043] In addition, an air chamber filled with gas is formed inside the thin cylinder 160. At this time, the air chamber is divided into an upper air chamber 181 and a lower air chamber 182 by the piston 190.

[0044] The above-mentioned guide bushing GB is arranged between the thick cylinder 110 and the guide post 120, and can guide the moving path of the guide post 120. The guide bushing GB extends in the length direction to form a cylindrical shape. The guide bushing GB can be divided into a guide rod 130 installed inside the thick cylinder 110, an O-ring 140 assembled inside the guide rod 130, and a ring cover 150 for preventing the O-ring 140 from disengaging. The guide bushing GB is composed of the guide rod 130, the O-ring 140, the ring cover 150, etc.

[0045] The above-mentioned guide rod 130 is generally made of synthetic resin material in a cylindrical shape, with a guide hole 133 passing through the center part vertically with a specified diameter. At the top of the inner surface of the guide hole 133, a ring cover mounting groove A131 with a diameter larger than that of the guide hole 133 is formed. At the bottom of the inner surface of the ring cover mounting groove A131, an O-ring mounting surface 132 where the sleeve extends to a specified interval is formed.

[0046] An O-ring 140 is inserted and mounted on the above-mentioned O-ring mounting surface 132, and a mounting protrusion 152 of a ring cover 150 is forcibly inserted and combined into the top ring cover mounting groove A131. The O-ring 140 prevents the guide rod 130 from disengaging outward from the top. A ring cover mounting groove B151 is provided inside the above-mentioned ring cover 150.

[0047] A flange 134 is formed at the top of the guide rod 130, which protrudes from the outer circumferential surface above the guide rod 130 to prevent it from exceeding the specified interval when being inserted into the thick cylinder 110, and the flange 134 is exposed outside the thick cylinder 110 above.

[0048] Support ribs 135 of the guide rod 130 protrude along the outer wall of the guide rod 130 in the longitudinal direction. Multiple support ribs 135 can be formed along the outer wall of the guide rod 130. The support ribs 135 are kept at a specified distance from adjacent support ribs 135.

[0049] The support ribs 135 of the guide rod 130 are combined with the top inner surface of the thick cylinder 110 by forced insertion to prevent shaking. When the guide post 120 is inserted into the guide rod 130 and moves up and down, smooth sliding can be achieved.

[0050] The function of the O-ring 150 installed at the top of the inner surface of the guide rod 130 is:

[0051] When the guide post 120 is inserted into the guide rod 130 and moves up and down along the inner surface of the guide rod 130, it prevents left and right shaking. Due to the elasticity of the O-ring 140 installed at the top of the inner surface of the guide rod 130, the guide post 120 can move up and down smoothly in a repetitive manner. In addition, in order to enable the guide post 120 inserted into the guide hole 133 to slide smoothly, when grease or liquid lubricating oil is applied to the inner surface of the guide hole 133 during use, it prevents the liquid lubricating oil from flowing out from the outer side of the top of the guide rod 130, or from flowing out from the exposed surface on the outer side when the guide post 120 rises.

[0052] See Figures 3 - 5 , an embodiment of a lifting seat of the present utility model, including a seat, a backrest, a seat chassis and a gas rod, characterized in that the gas rod adopts the gas rod of the above-mentioned embodiment, and the seat chassis is installed at the top of the gas rod.

[0053] Certainly, the above description is not a limitation to the present utility model, nor is the present utility model limited to the above examples. Changes, modifications, additions or substitutions made by those of ordinary skill in the art within the essence of the present utility model also fall within the protection scope of the present utility model.

Claims

1. A gas rod, comprising: A thick cylinder having a through hole; A guide column inserted into the thick cylinder for up and down reciprocating motion; A thin tube inserted into the guide post; as well as, A valve device inserted into the top of the inner surface of the capillary to control the direction of gas movement; and, A piston rod including a piston inserted in the middle of the cylinder; The lower end of the piston rod is fixed to the outer side of the lower end of the thick cylinder to provide support when the guide column moves up and down; A guide post sleeve is provided between the thick cylinder and the guide post to guide the guide post to move up and down; The invention is characterized in that an O-ring is inserted into and installed on the top of the inner surface of the guide column sleeve.

2. The gas rod according to claim 1, characterized in that: The guide column sleeve is made of synthetic resin. The O-ring is inserted into the top of the cylindrical inner surface of the guide column sleeve, and a mounting ring cover is inserted to prevent the O-ring from detaching outwards.

3. The gas rod according to claim 1 or 2, characterized in that: After the guide post sleeve is fixedly coupled to the thick cylinder, grease or liquid lubricant is applied to the inner surface of the guide post sleeve.

4. The gas rod according to claim 1 or 2, characterized in that: A buffer material that can absorb the impact of the guide column descending along the piston rod is installed at the lower end of the thick cylinder, and a bearing that absorbs the noise when the guide column rotates is installed below the buffer material. The bearing is fixed on the outer circumferential surface of the piston rod, and a fixing pin is inserted into the end of the piston rod for fixing.

5. The gas rod according to claim 3, characterized in that: A buffer material that can absorb the impact of the guide column descending along the piston rod is installed at the lower end of the thick cylinder, and a bearing that absorbs the noise when the guide column rotates is installed below the buffer material. The bearing is fixed on the outer circumferential surface of the piston rod, and a fixing pin is inserted into the end of the piston rod for fixing.

6. The gas rod according to claim 1 or 2, characterized in that: An air path is formed between the guide column and the thin tube. The lower part of the thin tube is connected to the air path to form an open support for gas inlet and outlet holes. An air seal is arranged below the open support to prevent gas leakage. There is also a flange made of buffer material below the air seal to absorb the impact force generated when the piston contacts the open support.

7. The gas rod according to claim 5, characterized in that: An air path is formed between the guide column and the thin tube. The lower part of the thin tube is connected to the air path to form an open support for gas inlet and outlet holes. An air seal is arranged below the open support to prevent gas leakage. There is also a flange made of buffer material below the air seal to absorb the impact force generated when the piston contacts the open support.

8. The gas rod according to claim 1 or 2, characterized in that: The valve device is installed above the thin cylinder inside the guide column, and a fixing bracket for fixing the valve device is arranged above the valve device, which passes through the center of the fixing bracket and has a part protruding toward the outside of the guide column to form a cotter pin.

9. The gas rod according to claim 7, characterized in that: The valve device is installed above the thin cylinder inside the guide column, and a fixing bracket for fixing the valve device is arranged above the valve device, which passes through the center of the fixing bracket and has a part protruding toward the outside of the guide column to form a cotter pin.

10. A lifting seat, comprising a seat, a backrest, a seat chassis and a gas rod, characterized in that: The gas rod is the gas rod as described in any one of claims 1 to 9, and the seat chassis is installed on the top of the gas rod.

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