Seat

Abstract

The utility model discloses a seat which comprises a seat frame connected with a connecting sleeve extending forwards; the backrest is connected to the seat frame and located above the connecting sleeve; the waist supporting mechanism comprises a waist rest and an adjusting shell, the adjusting shell is arranged on the outer side of the connecting sleeve in a sleeving mode, the adjusting shell can move front and back along the connecting sleeve and be positioned, an adjusting channel extending in the vertical direction is formed in the adjusting shell, a connecting rod is formed on the rear side of the waist rest, the connecting rod penetrates through the adjusting channel, and the connecting rod can move in the vertical direction and be positioned. An elastic assembly is arranged between the connecting rod and the adjusting channel, the elastic assembly has the trend that the connecting rod abuts against the front side of the adjusting channel, the height and the front-back depth of the waist rest can be adjusted, the waist rest can better adapt to the requirements of different users, the waist rest has forward elastic supporting force, and therefore the waist rest can be conveniently adjusted. The contact supporting tightness of the waist rest to a user can be improved, and the comfort of the user is further improved.

Description

Technical Field

[0001] This utility model relates to a type of furniture, and more particularly to a chair. Background Technology

[0002] There are various types of chairs. Some chairs are equipped with backrests to support the user's back. However, since the shape of the backrest cannot perfectly conform to the user's body shape, some backrests are equipped with fixed lumbar supports to improve user comfort. However, in use, the lumbar supports can only provide support to the user's lower back in a fixed position. Some backrests are equipped with lumbar supports that can move forward and backward, but their adjustment range is small and cannot better adapt to the needs of different users. Therefore, there is an urgent need for a chair that is more flexible in use. Utility Model Content

[0003] The purpose of this utility model is to provide a seat to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The solution to the technical problem of this utility model is:

[0005] A seat includes: a seat frame with a forward-extending connecting sleeve; a backrest connected to the seat frame, the backrest being located above the connecting sleeve; and a lumbar support mechanism including a lumbar support and an adjustment shell, the adjustment shell being sleeved on the outside of the connecting sleeve, the adjustment shell being movable and positioned along the connecting sleeve, an adjustment channel extending in a vertical direction being formed inside the adjustment shell, a connecting rod being formed on the rear side of the lumbar support, the connecting rod passing through the adjustment channel, the connecting rod being movable and positioned in a vertical direction, and an elastic component being disposed between the connecting rod and the adjustment channel, the elastic component having a tendency to press the connecting rod against the front side of the adjustment channel.

[0006] This technical solution has at least the following beneficial effects: The seat frame provides support for the human body during use. When in use, the user can move and position the connecting rod on the back of the lumbar support up and down within the adjustment channel to adjust the height of the lumbar support, ensuring it is positioned directly above the user's waist, better accommodating users of different body types. Moving and positioning the adjusting shell along the front-back direction of the connecting sleeve allows for adjustment of the depth of the lumbar support, making it closer to the user's waist. When the user leans back against the backrest, the waist contacts the lumbar support. Due to the elastic component providing forward pressure to the connecting rod, the lumbar support provides support for the waist. As the user leans back, the elastic component's force is overcome, causing the lumbar support to move backward with the pressure, maintaining close contact and support. This allows for adjustment of the lumbar support's height and front-back depth, better adapting to the needs of different users. Furthermore, the forward elastic support enhances the tightness of the lumbar support's contact with the user, further improving user comfort.

[0007] As a further improvement to the above technical solution, a first spring is provided between the adjusting shell and the connecting sleeve. The first spring has a tendency to push the adjusting shell forward. A first slot is provided on the bottom side of the connecting sleeve, and multiple first slots are provided along the front-back direction. The adjusting shell has an insert block that can enter and exit any of the first slots. When it is necessary to adjust the depth of the lumbar support along the front-back direction, the insert block can be removed from the first slot. At this time, the movement restriction on the adjusting shell and the connecting sleeve is released. The elastic force of the first spring pushes the adjusting shell forward to the end of its stroke. At this time, the user leans against the backrest, and his / her waist contacts the lumbar support. He / She presses the lumbar support backward, so that the first spring is elastically compressed. In this way, the lumbar support can be quickly adjusted to fit the depth of the user's waist. After completion, the insert block is inserted into the first slot directly opposite it, and the relative position of the adjusting shell and the connecting sleeve is relocked. In this way, the front-back movement adjustment and positioning of the lumbar support can be completed.

[0008] As a further improvement to the above technical solution, a transmission frame is movably connected to the bottom of the adjusting shell. The transmission frame moves up and down inside the adjusting shell. The insert block is formed at the top of the transmission frame. A rotating rod is rotatably connected to the adjusting shell along a horizontal axis. The rotating rod passes through the transmission frame. A protrusion is formed at the position of the rotating rod inside the adjusting shell. When the rotating rod rotates, the protrusion can press the transmission frame downward. A second spring is provided between the bottom side of the transmission frame and the bottom side inside the adjusting shell. During normal use, the upward lifting force of the second spring on the transmission frame keeps the insert at the top of the transmission frame inserted into the first slot, thus maintaining the relative position lock of the adjusting shell and the connecting sleeve. At this time, the protrusion of the rotating rod inside the transmission frame faces horizontally. When it is necessary to release the locking restriction of the insert on the adjusting shell and the connecting sleeve, rotate the rotating rod, causing the protrusion of the rotating rod inside the transmission frame to press down against the transmission frame, causing the transmission frame to move down. At this time, the second spring is elastically compressed, the insert at the top of the transmission frame exits the first slot, and the relative movement restriction of the adjusting shell and the connecting sleeve is released. After the front and rear depth adjustment of the lumbar support is completed, the external force on the rotation of the rotating rod is removed, and the restoring force of the second spring lifts the transmission frame upward, while the protrusion of the rotating rod rotates back to its original position as the transmission frame moves upward.

[0009] As a further improvement to the above technical solution, the elastic component includes a rotating shell and a torsion spring. The rotating shell is located inside the adjusting shell, and a limiting channel is formed inside the rotating shell corresponding to the position of the adjusting channel. The connecting rod is slidably connected to the limiting channel. The torsion spring is connected between the outer side of the rotating shell and the inner side of the adjusting shell. The torsion spring has a tendency to drive the rotating shell to rotate until the connecting rod abuts against the front top of the adjusting channel. The rotating shell can rotate inside the adjusting shell. When the rotating shell rotates, it can drive the lumbar support to rotate back and forth, thereby adjusting the angle of the lumbar support for the user's waist and improving the comfort of the lumbar support for the user. In the natural state, due to the torsion spring between the outer side of the rotating shell and the inner side of the adjusting shell, the torsion of the torsion spring causes the rotating shell to rotate until the connecting rod abuts against the front top of the adjusting channel, causing the top of the backrest to tilt forward, thereby providing elastic support for the waist. When the user's waist presses backward against the lumbar support, as the pressure on the lumbar support gradually increases, the lumbar support rotates backward and increases the support for the user's waist.

[0010] As a further improvement to the above technical solution, the outer side of the connecting rod is provided with multiple ratchet teeth along the vertical direction, and the inner side of the limiting channel is provided with a receiving groove. A ratchet is provided in the receiving groove, and the ratchet can enter or exit any of the ratchet teeth. When it is necessary to adjust the height of the lumbar support, the lumbar support is moved up or down. After the lumbar support is adjusted to the correct position, the ratchet engages with the corresponding ratchet tooth to achieve the adjustment and positioning of the lumbar support.

[0011] As a further improvement to the above technical solution, a guide rod is formed on the rear side of the lumbar support, and a guide channel extending in the vertical direction is formed inside the rotating shell. The guide rod is slidably connected to the guide channel. When the lumbar support moves up and down, the guide rod on the rear side of the lumbar support also slides up and down relative to the guide channel. The cooperation between the guide rod and the guide channel can improve the stability of the lumbar support's movement.

[0012] As a further improvement to the above technical solution, this utility model also includes a connecting arm, which is rotatably connected to the seat frame. An armrest shell is provided at the top of the connecting arm, which can rotate upwards or downwards until the armrest shell is in a horizontal position. The armrest shell is used to support and hold the user's hands. In use, the connecting arm can rotate upwards to allow the user's movements to pass, at which point the entire seat is converted to an armless position. When armrests are needed, the connecting arm is rotated downwards so that the armrest shell is in a horizontal position, at which point the entire seat is converted to an armrest position, thus improving overall usability.

[0013] As a further improvement to the above technical solution, a sliding member is slidably connected inside the armrest shell along the front-to-back direction. The top end of the connecting arm passes through the bottom side of the armrest shell and is rotatably connected to the sliding member. The sliding member can rotate and be positioned along an axis extending in the vertical direction. When the armrest shell supports the user's hands, the armrest shell itself can rotate and be positioned along the vertical axis through the internal sliding member, and the armrest shell can slide relative to the sliding member in the front-to-back direction. This allows the armrest shell to rotate and extend relative to the connecting arm, better adapting to different sitting postures of the user. In this way, the height and distance of the armrest shell can be adjusted according to the user's body shape, and the front-to-back position of the armrest shell can also be adjusted according to different sitting postures. It is highly flexible, better adapts to different usage needs, and improves the user experience.

[0014] As a further improvement to the above technical solution, a connecting post is formed at the top of the connecting arm, and a clearance groove extending in the front-to-back direction is provided on the bottom side of the armrest shell. The connecting post extends upward into the clearance groove and passes through the sliding member. A rotating block is connected to the top of the connecting post, and a universal wheel is provided inside the rotating block. A second slot is provided on the top side of the sliding member. Multiple second slots are arranged in a circumferential array around the connecting post, and the rotating end of the universal wheel can be connected to any one of the second slots. The armrest shell can be adjusted by sliding and rotating. Specifically, when the armrest shell needs to be slidably adjusted, it can be moved back and forth directly relative to the connecting arm. At this time, the sliding part slides back and forth within the armrest shell, while the clearance groove on the bottom side of the armrest shell can move and avoid the connecting column. When the armrest shell needs to be rotated, it can be rotated directly. At this time, it is necessary to overcome the resultant force generated by the interaction between the rolling end of the universal wheel and the second slot, so that the rolling end of the universal wheel moves out of the second slot and rotates into the second slot corresponding to the adjusted position of the armrest shell. The position of the armrest shell is positioned by the interaction between the rolling end of the universal wheel and the second slot, thus realizing the rotation adjustment of the armrest shell. This allows for convenient changes in the position of the armrest shell to adapt to the user's different posture needs.

[0015] As a further improvement to the above technical solution, the inner side of the armrest shell is provided with multiple third slots along the front-back direction. The sliding member contains an elastic element and a limiting block. The side of the limiting block facing the third slot is arc-shaped. The elastic element has a tendency to press the arc-shaped surface of the limiting block into any of the third slots. The elastic element pressing the arc-shaped surface of the limiting block into the third slot limits the position of the armrest shell and the sliding member. When the position of the armrest shell needs to be adjusted forward and backward, force is applied to the armrest shell, causing it to move forward and backward relative to the connecting arm. At this time, the inner wall of the third slot will press the limiting block against the elastic element, causing the elastic element to deform elastically, and the limiting block can then pass over the third slot. After the armrest shell is adjusted to the corresponding position, the elastic force of the elastic element presses the limiting block into the third slot. Through the cooperation of the limiting block and the third slot, the relative positioning of the armrest shell after sliding adjustment is achieved, improving the positional stability of the armrest shell during use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional view of the entire utility model.

[0018] Figure 2 This is a perspective view of the entire utility model after a vertical cross-section along the center.

[0019] Figure 3 yes Figure 2 A magnified view of part A.

[0020] Figure 4 This is a schematic diagram of the lumbar support and adjustment shell of this utility model, which are separated from each other.

[0021] Figure 5 This is a schematic diagram of the structure in which the connecting arm and the handrail shell of this utility model are separated.

[0022] In the attached diagram: 100-seat frame, 110-connecting sleeve, 111-first spring, 112-first slot, 200-backrest, 210-connecting rod, 211-ratchet, 220-guide rod, 310-lumbar support, 320-adjusting shell, 321-insertion block, 322-transmission frame, 323-rotating rod, 324-protrusion, 325-second spring, 326-adjustment channel, 331-rotating shell, 332-torsion spring, 333-limiting channel, 334-ratchet, 410-connecting arm, 411-connecting column, 420-armrest shell, 421-avoiding groove, 422-third slot, 430-sliding component, 431-rotating block, 432-universal wheel, 433-second slot, 434-elastic component, 435-limiting block. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Reference Figures 1 to 3 A seat includes a seat frame 100, a backrest 200, and a lumbar support mechanism. The seat frame 100 is connected to a forward-extending connecting sleeve 110. The backrest 200 is connected to the seat frame 100 and is located above the connecting sleeve 110. The lumbar support mechanism includes a lumbar support 310 and an adjustment shell 320. The adjustment shell 320 is fitted onto the outside of the connecting sleeve 110 and can move back and forth and be positioned along the connecting sleeve 110. An adjustment channel 326 extending in the vertical direction is formed inside the adjustment shell 320. A connecting rod 210 is formed on the rear side of the lumbar support 310. The connecting rod 210 passes through the adjustment channel 326 and can move and be positioned in the vertical direction. An elastic component is provided between the connecting rod 210 and the adjustment channel 326. The elastic component has a tendency to press the connecting rod 210 against the front side of the adjustment channel 326. Naturally, the seat also includes a seat cushion, which is connected to the seat frame 100 and located below the lumbar support mechanism. The seat frame 100 itself may have a structure that provides overall support at the bottom, or a base frame for overall support may be connected to the bottom side of the seat frame 100.

[0028] As described above, the seat frame 100 provides support for the human body during use. When in use, the user moves and positions the connecting rod 210 on the rear side of the lumbar support 310 within the adjustment channel 326, adjusting the height of the lumbar support 310 so that it is positioned directly above the user's waist, better accommodating users of different body types. Moving and positioning the adjustment shell 320 along the front-to-back direction of the connecting sleeve 110 adjusts the depth of the lumbar support 310, making it closer to the user's waist. When the user leans back against the backrest 200, their waist contacts the lumbar support 310, allowing for proper support. The elastic component provides a forward pressing force to the connecting rod 210. When the waist contacts the lumbar support 310, the lumbar support 310 can provide support for the waist. As the user leans back, the elastic force of the elastic component can be overcome, causing the lumbar support 310 to move backward with the pressure, maintaining close contact and support. This allows the height and depth of the lumbar support 310 to be adjusted, making the lumbar support 310 better adapt to the needs of different users. Furthermore, the forward elastic support force of the lumbar support 310 can improve the tightness of the contact support between the lumbar support 310 and the user, further improving the user's comfort.

[0029] There are several ways to move and position the adjusting shell 320 in the front-back direction outside the connecting sleeve 110. For example, a locking bolt is connected to the adjusting shell 320, and the end of the locking bolt is pressed against the outside of the connecting sleeve 110 to lock and position the adjusting shell 320 and the connecting sleeve 110. In order to improve the convenience of adjusting the front-back movement of the adjusting shell 320, in this embodiment, a first spring 111 is provided between the adjusting shell 320 and the connecting sleeve 110. The first spring 111 has a tendency to push the adjusting shell 320 forward. A first slot 112 is provided on the bottom side of the connecting sleeve 110. Multiple first slots 112 are provided in the front-back direction. The adjusting shell 320 has an insert block 321 that can enter and exit any one of the first slots 112. When it is necessary to adjust the depth of the lumbar support 310 in the front-back direction, the insert 321 can be removed from the first slot 112. At this time, the movement restriction on the adjusting shell 320 and the connecting sleeve 110 is released. The elastic force of the first spring 111 pushes the adjusting shell 320 forward to the end of its stroke. At this time, the user leans against the backrest 200, and his waist is in contact with the lumbar support 310. The user presses the lumbar support 310 backward, so that the first spring 111 is elastically compressed. In this way, the lumbar support 310 can be quickly adjusted to fit the depth of the user's waist. After completion, the insert 321 is inserted into the first slot 112 that is directly opposite it, so that the relative position of the adjusting shell 320 and the connecting sleeve 110 can be relocked. In this way, the front-back movement adjustment and positioning of the lumbar support 310 can be completed.

[0030] In the above embodiment, a portion of the insert 321 can protrude beyond the adjusting shell 320, thereby facilitating the movement of the insert 321. However, when the user is seated, it is difficult to accurately move their hand to the insert 321. To improve ease of operation, in this embodiment, a transmission frame 322 is movably connected to the bottom of the adjusting shell 320. The transmission frame 322 moves up and down within the adjusting shell 320, and the insert 321 is formed at the top of the transmission frame 322. The adjusting shell 320 rotates along a horizontal axis. A rotating rod 323 is movably connected to the transmission frame 322. The rotating rod 323 has a protrusion 324 at its position inside the adjusting shell 320. When the rotating rod 323 rotates, the protrusion 324 can press the transmission frame 322 downward. A second spring 325 is provided between the bottom side of the transmission frame 322 and the bottom side of the inner side of the adjusting shell 320. In practical applications, both ends of the rotating rod 323 can protrude from both sides of the adjusting shell 320, which allows the user to rotate the rotating rod 323 in different positions. During normal use, the spring force of the second spring 325 pushing the transmission frame 322 upward keeps the insert block 321 at the top of the transmission frame 322 inserted into the first slot 112, thereby maintaining the relative position lock between the adjusting shell 320 and the connecting sleeve 110. At this time, the protrusion 324 of the rotating rod 323 inside the transmission frame 322 faces horizontally. When it is necessary to release the locking restriction of the insert block 321 on the adjusting shell 320 and the connecting sleeve 110, the rotating rod 323 is rotated, causing the rotating rod 323 to be positioned inside the transmission frame 322. The protrusion 324 presses down against the transmission frame 322, causing the transmission frame 322 to move down. At this time, the second spring 325 is elastically compressed, and the insert block 321 at the top of the transmission frame 322 exits the first slot 112, releasing the relative movement restriction between the adjusting shell 320 and the connecting sleeve 110. After the front and rear depth adjustment of the waist rest 310 is completed, the external force on the rotation of the rotating rod 323 is removed, and the elastic force of the second spring 325 restores the transmission frame 322 upward, while the protrusion 324 of the rotating rod 323 rotates and resets as the transmission frame 322 moves upward.

[0031] The elastic component can provide only a forward elastic thrust to the connecting rod 210. In this case, it is sufficient to install an elastic structure such as a spring or rubber inside the adjusting housing 320 to press against the rear side of the connecting rod 210. However, to further improve the user experience, the elastic component can provide a forward rotational thrust, specifically, such as... Figure 4As shown, the elastic component includes a rotating shell 331 and a torsion spring 332. The rotating shell 331 is located inside the adjusting shell 320. A limiting channel 333 is formed inside the rotating shell 331 corresponding to the position of the adjusting channel 326. The connecting rod 210 is slidably connected to the limiting channel 333. The torsion spring 332 is connected between the outer side of the rotating shell 331 and the inner side of the adjusting shell 320. The torsion spring 332 has the tendency to drive the rotating shell 331 to rotate until the connecting rod 210 abuts against the top front side of the adjusting channel 326. The rotating shell 331 can rotate within the adjusting shell 320. When the rotating shell 331 rotates, it can drive the lumbar support 310 to rotate back and forth, thereby adjusting the angle of the lumbar support 310 supporting the user's waist and improving the comfort of the lumbar support 310 supporting the user. In the natural state, due to the torsion spring 332 between the outer side of the rotating shell 331 and the inner side of the adjusting shell 320, the torsion of the torsion spring 332 causes the rotating shell 331 to rotate until the connecting rod 210 abuts against the front of the top of the adjusting channel 326, so that the top of the backrest 200 tilts forward, thereby providing elastic support for the waist. When the user's waist presses backward against the lumbar support 310, as the pressure on the lumbar support 310 gradually increases, the lumbar support 310 rotates backward and increases the support for the user's waist.

[0032] There are several ways to move and position the connecting rod 210 up and down within the limiting channel 333. For example, the outer side of the connecting rod 210 has multiple ratchet teeth 211 along the vertical direction, and the inner side of the limiting channel 333 has a receiving groove. A ratchet wheel 334 is provided in the receiving groove, and the ratchet wheel 334 can enter or exit any of the ratchet teeth 211. When it is necessary to adjust the height of the lumbar support 310, the lumbar support 310 is moved up or down. After the lumbar support 310 is adjusted to the correct position, the ratchet wheel 334 engages with the corresponding ratchet tooth 211 to achieve the adjustment and positioning of the lumbar support 310.

[0033] There are several ways to rotate the ratchet 334 into and out of the ratchet 211. For example, the ratchet 334 is coaxially connected to an adjusting shaft, which passes through the adjusting housing 320. Rotating the adjusting shaft will drive the ratchet 334 to rotate. In this embodiment, a locking block is formed on the top of the ratchet 334, which engages with the ratchet 211, thereby achieving the engagement with the ratchet 211. To maintain the engagement, a third spring can be provided between the top of the ratchet 334 and the inner wall of the receiving groove. The third spring provides elastic resistance to the ratchet 334, while the ratchet 211 itself can limit the relative upward movement of the locking block. The waist support 310 can... Adjust directly upwards. When it is necessary to adjust the lumbar support 310 downwards, move the lumbar support 310 upwards to the end of its stroke. At this time, the step set on the connecting rod 210 can push the ratchet 334 away from the ratchet 211, and make the ratchet 334 lock in the positioning protrusion inside the receiving groove, keeping the locking block disengaged from the ratchet 211. The third spring is elastically compressed. Then move the lumbar support 310 downwards to the end of its stroke, so that the locking block abuts against the inner top side of the receiving groove, pushing the locking block out of the positioning protrusion. The elastic force of the third spring restores the ratchet 334 to push it closer to the ratchet 211, so that the locking block re-engages with the ratchet 211.

[0034] To improve the stability of the lumbar support 310's movement, in this embodiment, a guide rod 220 is formed on the rear side of the lumbar support 310, and a guide channel extending in the vertical direction is formed inside the rotating housing 331. The guide rod 220 is slidably connected to the guide channel. When the lumbar support 310 moves up and down, the guide rod 220 on the rear side of the lumbar support 310 also slides up and down relative to the guide channel. The cooperation between the guide rod 220 and the guide channel can improve the stability of the lumbar support 310's movement. Naturally, a channel is also provided in the adjusting housing 320 at the position corresponding to the guide channel to avoid the movement of the guide rod 220.

[0035] This utility model also includes a connecting arm 410, which is rotatably connected to the seat frame 100. An armrest housing 420 is provided at the top of the connecting arm 410. The connecting arm 410 can rotate upwards or downwards until the armrest housing 420 is in a horizontal position. The armrest housing 420 is used to support and hold the user's hands. In use, the connecting arm 410 can rotate upwards to allow the user's movements to pass, at which point the entire seat is in armless mode. When armrests are needed, the connecting arm 410 is rotated downwards so that the armrest housing 420 is in a horizontal position, at which point the entire seat is in armrest mode, thus improving overall usability.

[0036] The armrest shell 420 can be fixedly mounted on the connecting arm 410. However, to better meet the needs of different users, the armrest shell 420 can be movably mounted on the connecting arm 410. Specifically, a sliding member 430 is slidably connected inside the armrest shell 420 in the front-back direction. The top end of the connecting arm 410 passes through the bottom side of the armrest shell 420 and is rotatably connected to the sliding member 430. The sliding member 430 can rotate and be positioned along an axis extending in the up-down direction. When the armrest shell 420 supports the user's hands, the armrest shell 420 itself can rotate and be positioned along the vertical axis through the internal sliding member 430, and the armrest shell 420 can slide relative to the sliding member 430 in the front-back direction, so that the armrest shell 420 can rotate and extend and adjust relative to the connecting arm 410, better adapting to different sitting postures of the user. In this way, the height and distance of the armrest shell 420 can be adjusted according to the user's body shape, and the front-back position of the armrest shell 420 can also be adjusted according to different sitting postures, which is highly flexible, better adapts to different usage needs, and improves the user experience.

[0037] like Figure 5 As shown, in a specific embodiment of the armrest shell 420 rotating and positioning on the connecting arm 410, a connecting post 411 is formed at the top of the connecting arm 410, and a clearance groove 421 extending in the front-rear direction is provided on the bottom side of the armrest shell 420. The connecting post 411 extends upward into the clearance groove 421 and passes through the sliding member 430. A rotating block 431 is connected to the top of the connecting post 411, and a universal wheel 432 is provided in the rotating block 431. A second slot 433 is provided on the top side of the sliding member 430. Multiple second slots 433 are arranged in a circumferential array around the connecting post 411, and the rotating end of the universal wheel 432 can be connected to any one of the second slots 433. The armrest shell 420 can be adjusted by sliding and rotating. Specifically, when the armrest shell 420 needs to be slidably adjusted, it can be moved back and forth directly relative to the connecting arm 410. At this time, the sliding member 430 slides back and forth within the armrest shell 420, and the clearance groove 421 on the bottom side of the armrest shell 420 can move to avoid the connecting column 411. When the armrest shell 420 needs to be rotated, it can be rotated directly. At this time, it is necessary to overcome the resultant force generated by the interaction between the rolling end of the universal wheel 432 and the second slot 433, so that the rolling end of the universal wheel 432 moves out of the second slot 433 and rotates into the second slot 433 corresponding to the adjusted position of the armrest shell 420. The position of the armrest shell 420 is positioned by the interaction between the rolling end of the universal wheel 432 and the second slot 433, thereby realizing the rotation adjustment of the armrest shell 420. In this way, the position of the armrest shell 420 can be easily changed to adapt to the user's different posture needs.

[0038] The caster wheel 432 includes a ball bearing seat and a ball bearing. The ball bearing is installed in the ball bearing seat, and a portion of the ball bearing protrudes from the ball bearing seat, forming a rolling end. The ball bearing has a certain amount of space to move within the ball bearing seat. An elastic structure, such as a spring or rubber post, is installed inside the ball bearing seat. The elastic structure presses against the ball bearing, keeping the ball bearing protruding from the ball bearing seat. When an external force is applied to the ball bearing, it can be pressed into the ball bearing seat, compressing the elastic structure and reducing the amount of the ball bearing protruding from the ball bearing seat. Thus, when the armrest housing 420 needs to be rotated due to external force, the rolling end of the caster wheel 432 can easily move out of the second slot 433, improving the smoothness of the rotation adjustment of the armrest housing 420.

[0039] The number of casters 432 can be one or more. In this embodiment, two casters 432 are symmetrically arranged around the connecting post 411. The two casters 432 are respectively engaged with two corresponding slots on both sides of the connecting post 411, thereby restricting the rotation of the armrest shell 420 relative to the connecting arm 410, which can improve the stability of the rotation limit of the armrest shell 420.

[0040] After the armrest shell 420 is slidably adjusted relative to the sliding member 430 to maintain its position, in this embodiment, a plurality of third slots 422 are provided on the inner side of the armrest shell 420 along the front-back direction. An elastic member 434 and a limiting block 435 are provided inside the sliding member 430. The side of the limiting block 435 facing the third slot 422 is an arc-shaped surface. The elastic member 434 has a tendency to press the arc-shaped surface of the limiting block 435 into any of the third slots 422. The elastic element 434 presses the arc surface of the limiting block 435 into the third slot 422, which can limit the position of the armrest shell 420 and the sliding element 430. When it is necessary to adjust the position of the armrest shell 420 back and forth, force is applied to the armrest shell 420, causing the armrest shell 420 to move back and forth relative to the connecting arm 410. At this time, the inner wall of the third slot 422 will press the limiting block 435 towards the elastic element 434, causing the elastic element 434 to deform elastically, and the limiting block 435 can pass through the third slot 422. After the armrest shell 420 is adjusted to the corresponding position, the elastic force of the elastic element 434 presses the limiting block 435 into the third slot 422. Through the cooperation of the limiting block 435 and the third slot 422, the relative positioning of the armrest shell 420 after sliding adjustment is achieved, improving the positional stability of the armrest shell 420 during use.

[0041] In the above embodiment, there can be only one limiting block 435. In this case, the elastic element 434 provides unilateral elastic positioning for the limiting block 435. In addition, the elastic element 434 is mainly used to provide a force to press the limiting block 435 into the third slot 422 for positioning. It can be a rubber column, torsion spring 332 or other structures. In this embodiment, the elastic element 434 is a spring. The limiting block 435 is respectively provided at both ends of the elastic element 434. Multiple third slots 422 are respectively provided on the left and right sides of the armrest shell 420. The elastic element 434 can press the arc-shaped surfaces of the two limiting blocks 435 into the corresponding third slots 422. A third slot 422 is provided on the left and right sides of the sliding member 430 inside the armrest shell 420. The two ends of the spring act on two limiting blocks 435 respectively, pressing the arc-shaped surfaces of the two limiting blocks 435 into the two third slots 422. This forms a sliding connection and positioning on both sides of the sliding member 430 and both sides of the armrest shell 420, which can further improve the stability of the relative positioning of the sliding member 430 inside the armrest shell 420.

[0042] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A type of seat, characterized in that: include: The frame (100) is connected to a forward-extending connecting sleeve (110); A backrest (200) is connected to the seat frame (100), and the backrest (200) is located above the connecting sleeve (110); The lumbar support mechanism includes a lumbar support (310) and an adjustment shell (320). The adjustment shell (320) is sleeved on the outside of the connecting sleeve (110). The adjustment shell (320) can move back and forth and be positioned along the connecting sleeve (110). An adjustment channel (326) extending in the vertical direction is formed inside the adjustment shell (320). A connecting rod (210) is formed on the rear side of the lumbar support (310). The connecting rod (210) passes through the adjustment channel (326). The connecting rod (210) can move in the vertical direction and be positioned. An elastic component is provided between the connecting rod (210) and the adjustment channel (326). The elastic component has a tendency to press the connecting rod (210) against the front side of the adjustment channel (326).

2. The seat according to claim 1, characterized in that: A first spring (111) is provided between the adjusting shell (320) and the connecting sleeve (110). The first spring (111) has a tendency to push the adjusting shell (320) forward. A first slot (112) is provided on the bottom side of the connecting sleeve (110). Multiple first slots (112) are provided along the front-back direction. The adjusting shell (320) has an insert (321) that can enter and exit any of the first slots (112).

3. A seat according to claim 2, characterized in that: The bottom of the adjusting shell (320) is movably connected to a transmission frame (322), which moves up and down inside the adjusting shell (320). The insert block (321) is formed at the top of the transmission frame (322). The adjusting shell (320) is rotatably connected to a rotating rod (323) along a horizontal axis. The rotating rod (323) passes through the transmission frame (322). A protrusion (324) is formed at the position of the rotating rod (323) inside the adjusting shell (320). When the rotating rod (323) rotates, the protrusion (324) can press the transmission frame (322) downward. A second spring (325) is provided between the bottom side of the transmission frame (322) and the bottom side inside the adjusting shell (320).

4. A seat according to claim 1, characterized in that: The elastic component includes a rotating shell (331) and a torsion spring (332). The rotating shell (331) is located inside the adjusting shell (320). A limiting channel (333) is formed inside the rotating shell (331) corresponding to the position of the adjusting channel (326). The connecting rod (210) is slidably connected to the limiting channel (333). The torsion spring (332) is connected between the outside of the rotating shell (331) and the inside of the adjusting shell (320). The torsion spring (332) has the tendency to drive the rotating shell (331) to rotate until the connecting rod (210) abuts against the front of the top of the adjusting channel (326).

5. A seat according to claim 4, characterized in that: The connecting rod (210) has multiple ratchet teeth (211) arranged on its outer side along the vertical direction. The limiting channel (333) has a receiving groove on its inner side. A ratchet wheel (334) is arranged in the receiving groove. The ratchet wheel (334) can enter or exit any of the ratchet teeth (211).

6. A seat according to claim 4, characterized in that: A guide rod (220) is formed on the rear side of the lumbar support (310), and a guide channel extending in the vertical direction is formed inside the rotating shell (331). The guide rod (220) is slidably connected to the guide channel.

7. A seat according to claim 1, characterized in that: It also includes a connecting arm (410), which is rotatably connected to the seat frame (100). The top end of the connecting arm (410) is provided with an armrest shell (420). The connecting arm (410) can rotate upward or downward until the armrest shell (420) is in a horizontal state.

8. A seat according to claim 7, characterized in that: The armrest shell (420) has a sliding member (430) slidably connected inside in the front-to-back direction. The top end of the connecting arm (410) passes through the bottom side of the armrest shell (420) and is rotatably connected to the sliding member (430). The sliding member (430) can rotate and be positioned along an axis extending in the up-down direction.

9. A seat according to claim 8, characterized in that: The top of the connecting arm (410) is formed with a connecting post (411), and the bottom side of the armrest shell (420) is provided with a relief groove (421) extending in the front-back direction. The connecting post (411) extends upward into the relief groove (421) and passes through the sliding member (430). The top of the connecting post (411) is connected to a rotating block (431), and a universal wheel (432) is provided in the rotating block (431). The top side of the sliding member (430) is provided with a second slot (433). Multiple second slots (433) are arranged in a circumferential array around the connecting post (411). The rotating end of the universal wheel (432) can be connected to any one of the second slots (433).

10. A seat according to claim 8, characterized in that: The inner side of the armrest shell (420) is provided with a plurality of third slots (422) along the front-back direction. The sliding member (430) is provided with an elastic member (434) and a limiting block (435). The side of the limiting block (435) facing the third slot (422) is an arc-shaped surface. The elastic member (434) has a tendency to press the arc-shaped surface of the limiting block (435) into any of the third slots (422).

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