Doctor's chair with adjustable seat

Abstract

This invention discloses an adjustable physician chair, comprising a seat, armrests, and caster wheels. The seat includes a seat portion with a base and cushion, a backrest portion with a backrest and cushion, and a seat post. The base includes a fixed seat, a sliding seat, and a seat plate. The backrest includes a lower backrest and an upper backrest. When the upper and lower backrests rotate relative to each other and fold down, the backrest and seat cushion are close together and fit together vertically. The sliding seat includes a seat body, a control arm, and a mounting seat. The seat plate is mounted on the mounting seat. The physician chair also includes a seat adjustment structure, which includes a flipping mechanism and a lifting mechanism. This invention not only allows for forward and backward and vertical adjustment of the seat, but also for angle adjustment of the seat portion and backrest portion. In particular, the backrest portion itself is height adjustable. Therefore, it provides optimal support for the seat at the required angle and height for different physicians during work or rest.

Description

[0001] This application is a divisional application filed on November 19, 2021, with application number 2021113756962, entitled "A Doctor's Chair". Technical Field

[0002] This invention belongs to the field of medical devices, specifically relating to an adjustable physician chair. Background Technology

[0003] As we all know, doctors are prone to physical fatigue when performing examinations or treatments for extended periods of time. If they cannot relieve the fatigue in their limbs, their operation will become unstable, directly affecting the results of the treatment or examination.

[0004] Currently, physician chairs consist of a seat, armrests, and wheels. The seats and armrests are generally fixed and cannot be adjusted. Therefore, when physicians are resting or working, the seats and armrests cannot provide adequate support at the appropriate angles and positions (mainly front-to-back and up-down). Moreover, due to the differences in physicians' body shapes, ordinary chairs are also difficult to meet the needs of working or resting. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an improved adjustable doctor's chair.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: an adjustable doctor's chair, comprising a seat, armrests, and a caster assembly, wherein the seat includes a seat portion having a base and a cushion, a backrest portion having a backrest and a backrest cushion, and a seat post; the base includes a fixed seat, a slide seat slidably disposed on the fixed seat along the front-back direction, and a seat plate disposed on the slide seat; wherein a slide rail extending along the front-back direction is provided on the fixed seat; the cushion is mounted on the seat plate; the backrest includes a lower backrest rod whose lower end abuts against the slide seat, and an upper backrest rod that rotates with the lower backrest rod and moves and adjusts along the length direction of the lower backrest rod; the cushion is mounted on the lower backrest rod and / or the upper backrest rod; when the upper backrest rod rotates and folds relative to the lower backrest rod... The backrest and seat cushion are positioned close to each other and fit together vertically. The slide includes a seat body slidably mounted on a slide rail, a control arm connected to the seat body and lockable relative to a fixed seat, and a mounting seat mounted on the seat body. The seat plate is mounted on the mounting seat. When the control arm is subjected to an external force and remains under that force, it disengages from the fixed seat and unlocks. The slide slides along the length of the slide rail. When the external force on the control arm disappears, the control arm resets and locks with the fixed seat. The seat rod includes an inner sleeve rod and an outer sleeve rod. The doctor's chair also includes a seat adjustment structure, which includes a flipping mechanism disposed between the slide and the seat plate to drive the seat plate to flip around the horizontal direction, and a lifting mechanism for driving the inner sleeve rod and the outer sleeve rod to extend or shorten relative to each other.

[0007] Preferably, the inner sleeve rod is fixed to the chassis of the doctor's chair from its lower end, and the outer sleeve rod is movably positioned relative to the inner sleeve rod along its length, with its upper end fixed to the fixed seat. In some specific embodiments, the seat plate is rotatably connected to the front end of the slide via a pivot, and the seat plate's flipping mechanism is concealed between the seat plate and the slide. In this way, the angle of the seat plate can be adjusted by driving the rear end of the seat plate to swing up and down.

[0008] According to a specific embodiment and preferred aspect of the present invention, a control arm extends forward from the front end of the seat body and is located below the seat portion. The control arm is rotatably mounted on the seat body from its rear end, and a tension spring is provided between the control arm and the seat body to keep the control arm in relative contact with the seat body. A plurality of insertion slots are formed on the fixed base distributed along the front-rear direction. A plug-in connector matching the insertion slot is formed on the control arm. During adjustment, the control arm rotates upward around its rear end, the tension spring is stressed, and the plug-in connector of the control arm disengages from the insertion slot, causing the seat portion to move back and forth. When the control arm loses external force, the tension spring returns to its original position, and the plug-in connector inserts into the insertion slot. Here, the fore-and-aft position adjustment of the seat can be conveniently achieved through the movement and reset of the control arm.

[0009] In some specific embodiments, multiple plug slots are arranged side by side to form two rows, the plugs are located on opposite sides of the control arm, and there are two tension springs, which are correspondingly distributed on opposite sides of the control arm.

[0010] Preferably, the mounting base includes a seat bucket with an upward-facing opening, a connecting rod fixed to the base body, and a seat sleeve disposed in the seat bucket and having contact with the connecting rod. The seat plate is rotatably connected to the upper part of the front end of the seat bucket via a horizontally extending pivot, and a sliding groove is formed at the front end of the seat bucket from top to bottom. That is, the seat plate can close the seat bucket and facilitates the docking of the seat bucket and the base body.

[0011] According to another specific embodiment and preferred aspect of the invention, the tilting mechanism includes a slider slidably disposed in the groove, a connecting module fixed to the rear of the seat plate, a support rod rotatably connected at both ends between the slider and the connecting module, and a locking member for locking the slider relative to the seat cup, wherein the support rod is a telescopic rod and is a cylinder, hydraulic cylinder, or electric cylinder. With this structural design, the angle at which the seat plate tilts about a pivot can be controlled by manipulating the position of the slider. Simultaneously, by further changing the length of the support rod, the position of the slider can be controlled, thereby allowing the seat plate to present the desired angle.

[0012] Preferably, an internal support frame is also provided inside the seat compartment. The internal support frame includes a diagonal brace with one end fixed to the front end of the seat compartment and the other end supported on the seat cover; and a support plate for positioning the diagonal brace on the bottom plate of the seat compartment. Here, universal rotation adjustment can accommodate any angle change and always maintain effective support. In some specific embodiments, a connecting bolt is provided on the diagonal brace, and a ball head is formed at the upper end. A connecting head is provided at the corresponding position on the seat plate, and the connecting head and the ball head are rotatably connected in a wrapping manner.

[0013] According to another specific embodiment and preferred aspect of the invention, the flipping mechanism further includes a top support component disposed between the front and rear portions of the seat plate and mounted on the inner support frame, the top support component including a first component disposed on the diagonal brace and a second component disposed on the seat plate, wherein the first component and the second component are rotatably connected.

[0014] Furthermore, there are two seat rods, and a sleeve is formed on the outer periphery of each inner sleeve rod. A ball bearing is provided on the sleeve. The inner wall of the outer sleeve rod is fitted with the ball bearing and moves up and down along the length of the inner sleeve rod. The lifting mechanism includes a power lifting rod disposed between the chassis and the fixed seat, and a limiting module disposed at the lower end of each inner sleeve rod and protruding outward from the outer periphery. The relative adjustment of the inner and outer sleeve rods is facilitated by the sliding and guiding of the ball bearings.

[0015] Preferably, a notch is formed at the rear of the seat plate and the seat cushion. The lower backrest is connected to the slide block from its lower end via a connecting shaft. The upper end of the lower backrest protrudes from the notch and is positioned above the seat cushion. The upper backrest includes a first rod that rotates and locks with the upper part of the lower backrest in a horizontal direction, a second rod that is movably disposed on the first rod along its length, and a locking part that locks the first rod and the second rod relative to each other. The backrest is disposed on the upper part of the second rod. This structure offers two advantages: 1. It allows for adjustment of the backrest's tilt angle; 2. It allows for adjustment of the backrest's extension height. In other words, both the angle and height are ultimately designed to meet the needs of doctors during work or rest.

[0016] Preferably, the backrest is positioned on the upper part of the second rod. This allows for adjustment of the backrest's position by adjusting the second rod, thereby providing comfortable support at a suitable position and angle for the backrest. Due to the implementation of the above technical solution, the present invention has the following advantages compared to the prior art:

[0017] This invention not only enables the seat to be adjusted forward and backward and up and down, but also to adjust the angle of the seat and backrest. In particular, the backrest itself can also be height adjusted. Therefore, it can provide the best support for the seat at the required angle and height when doctors are working or resting. At the same time, the structure is simple, easy to implement, and low in cost. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of the physician's chair of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the center armrest adjustment mechanism;

[0021] Figure 3 for Figure 2 A partial structural diagram;

[0022] Figure 4 This is a schematic diagram of the structure of the handrail of the present invention;

[0023] Figure 5 for Figure 4 Front view diagram;

[0024] Figure 6 for Figure 4 A top-down view;

[0025] Figure 7 for Figure 6 Schematic diagram of the sectional view along the central AA direction;

[0026] Figure 8 for Figure 4 Schematic diagram of a local structure in the middle;

[0027] Figure 9 for Figure 1 A schematic diagram of the middle seat and seat adjustment mechanism;

[0028] Figure 10 for Figure 9 A partial structural diagram;

[0029] Figure 11 for Figure 10 A top-down view;

[0030] Figure 12 for Figure 11 Schematic diagram of the BB-direction section;

[0031] Figure 13 for Figure 9 A partial schematic diagram;

[0032] Figure 14 for Figure 13 A left-view diagram;

[0033] Wherein: F, armrest; T, adjusting seat; t1, seat body; t2, seat frame; t20, frame sleeve; G1, first adjusting rod; G2, second adjusting rod; M, drive motor; L, drive wheel; S, drive shaft; Q1, first coupling; Q2, second coupling; C1, first transmission shaft; C2, second transmission shaft; D1, first transmission component;

[0034] D2, Second transmission component; d10, Transmission gear; d11, Transmission rack; f1, Handrail frame; f10, Support frame plate; f100, Rectangular panel; f101, Folding plate; f11, Support frame rod; 110, Main rod; 111, Auxiliary rod; f2, Handrail pad; f21, First pad; f22, Second pad; f23, Third pad; f3, Universal joint; f30, Ball head; f31, Ball seat; 310, Upper seat; 311, Lower seat; 312, Spacer; a, Upper ball; b, Lower ball; 313, Elastic connector; f4, Locking component; f40, Locking tongue; f41, Operating lever; 410, Extension arm; 411, Handle lever; f42, Ball bearing; f5, Guide support frame; f50, U-shaped base frame; f51, Connecting piece.

[0035] Y, Seat; 1, Seat section; 10, Base; 100, Fixed seat; x, Socket; 100a, Slide rail; 101, Slide seat; a, Seat body; b, Control arm; b 1, Socket; c, Mounting seat; c 1, Seat pocket; c 10, Slide groove; c 11, Inner support frame; c 110, Diagonal brace; c 111, Support plate; c 2, Connecting rod; c 3, Seat cover; h, Tension spring; 102, Seat plate; 11, Seat cushion; 12, Flipping mechanism; 120, Slider; 121, Connecting module; 122, Support rod; 123, Locking element; 124, Top support component; d 1, First component; d2, Second component; 2, Backrest section; 20, Backrest; 200, Lower backrest rod; 201, Upper backrest rod; g 1. First shaft; g2. Second shaft; 21. Cushion; 3. Seat post; 30. Inner sleeve; 31. Outer sleeve; 32. Sleeve; 33. Ball bearing;

[0036] 13. Lifting mechanism; 130. Power lifting rod; 131. Limit module; 132. Hydraulic pump station;

[0037] P, chassis; E, wheel assembly. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0044] like Figure 1 As shown, the physician chair in this embodiment includes a seat Y, armrests F, a wheel assembly E, an armrest adjustment structure, and a seat adjustment structure. There are two armrests F, located on opposite sides of the seat Y.

[0045] Specifically, each handrail F includes a handrail frame f1 and a handrail pad f2, wherein the handrail frame f1 includes a support plate f10 and a support rod f11.

[0046] Combination Figure 2 and Figure 3 As shown, the armrest adjustment structure includes an adjustment seat T fixed on the seat Y, a first adjustment rod G1 and a second adjustment rod G2 movably mounted on the adjustment seat T, a universal joint f3 connecting the support frame plate f10 and the support frame rod f11 of each armrest F, and a locking member f4 extending into the corresponding universal joint f3 and cooperating with the universal joint f3 to position the support frame plate f10 and the support frame rod f11 in the required position.

[0047] The end of the support rod f11 away from the support plate f10 is fixedly connected to the first adjusting rod G1 and the second adjusting rod G2 respectively, and the first adjusting rod G1 and the second adjusting rod G2 are adjusted up and down synchronously, sequentially or independently.

[0048] Specifically, the adjusting seat T includes a seat body t1 and a seat frame t2 extending horizontally to both sides. The first adjusting rod G1 and the second adjusting rod G2 are respectively movably adjusted at both ends of the seat frame t2.

[0049] The adjustment structure also includes a drive motor M, a drive wheel L mounted on a base t1 and rotating horizontally, a drive shaft S extending from the center of the drive wheel L and fixedly mounted thereon, a first coupling Q1 and a second coupling Q2 connected to both ends of the drive shaft S, a first transmission shaft C1 and a second transmission shaft C2 respectively connected to the first coupling Q1 and the second coupling Q2, a first transmission component D1 connecting the first transmission shaft C1 to the first adjusting rod G1, and a second transmission component D2 connecting the second transmission shaft C2 to the second adjusting rod G2. The first coupling Q1 and the second coupling Q2 can operate synchronously, or one of them can operate, or they can operate sequentially. Here, the coupling is equivalent to a commonly used clutch; once disengaged, the transmission shaft and the drive shaft cannot move synchronously; only when the clutch is engaged will the transmission shaft and the drive shaft move synchronously, thus meeting the needs of different operating conditions.

[0050] Specifically, the first transmission component D1 and the second transmission component D2 have the same structure. Therefore, if the structure of the first transmission component D1 is clear, the structure of the second transmission component D2 is also clear.

[0051] Similarly, the structures of the first coupling Q1 and the second coupling Q2 are the same.

[0052] In this example, the first transmission component D1 includes a transmission gear d10 fixed on the first transmission shaft C1 and a transmission rack d11 that is movably mounted on the seat t2 and cooperates with the transmission gear d10, wherein the transmission rack d11 is fixedly connected to the first adjusting rod G1.

[0053] Specifically, a vertically extending sleeve t 20 is formed at the end of the base t 2, and the transmission rack d 11 is movably arranged in the sleeve t 20. This further improves the stability of the vertical movement.

[0054] Combination Figure 4 and Figure 5 As shown, the armrest frame f1 includes a support frame plate f10 and a support frame rod f11. The support frame plate f10 includes a rectangular panel f100 and folded plates f101 that bend downwards from both sides of the rectangular panel f100 along its length. The support frame rod f11 includes a main rod 110 and an auxiliary rod 111. A universal joint f3 connects the main rod 110 to the rectangular panel f100, and the auxiliary rod 111 connects to the doctor's chair.

[0055] In this example, the rectangular panel f100 and the folded plate f101 are integrally formed and are sheet metal parts.

[0056] Combination Figure 6As shown, the armrest pad f2 is also an integral part, and includes a first pad f21 fixed to the rectangular panel f 100, a second pad f22 and a third pad f23 respectively disposed on both sides of the first pad f21 along its length. The first pad f21, the second pad f22 and the third pad f23 form an upward-facing support area. In this way, the formed support area is not only comfortable, but also has a certain limiting effect, preventing the armrest from accidentally detaching and losing support during operation.

[0057] The universal joint f3 is located near the front end of the support plate f10, and the locking member f4 extends along the length of the support plate f10 to the other end, with the extended end located below the corresponding end of the support plate f10.

[0058] In this example, the armrest pad f2 is a commonly used flexible pad.

[0059] Combination Figure 7 As shown, the locking element f4 can extend into the universal joint f3 and cooperate with the universal joint f3 to position the support frame plate f10 and the support frame rod f11 in the required positions. Simultaneously, when the locking element f4 is subjected to external force and remains under force, it rotates in the universal joint f3 and the support frame plate f10 relative to the support frame rod f11 for universal adjustment. After the external force on the locking element f4 is removed, the locking element f4 locks the universal joint f3, and the positions of the support frame plate f10 and the support frame rod f11 are relatively fixed. In this way, the universal joint allows for adjustments to any desired angle and position, thus meeting the needs of different physicians' usage habits.

[0060] Combination Figure 8 As shown, the universal joint f3 includes a ball head f30 and a ball seat f31, wherein the ball head f30 is fixed to the main rod 110, and the ball seat f31 is fixed to the bottom of the rectangular panel f100. This arrangement is mainly for ease of assembly, and also facilitates the stable implementation of handrail position adjustment.

[0061] The ball joint f31 includes an upper seat 310 and a lower seat 311 forming the ball head cavity, a spacer 312, and an elastic connector 313. The upper seat 310 is fixed to the bottom of the rectangular panel f100. The spacer 312 separates the upper seat 310 and the lower seat 312 relative to each other. The elastic connector 313 elastically abuts the lower seat 311 against the spacer 312. When the upper seat 310 and the lower seat 311 are relatively clamped on the opposing surfaces of the ball head f30, the universal joint 3 is in a locked state. When the upper seat 310 and the lower seat 311 are relatively disengaged and disengaged from the surface of the ball head f30, the universal joint 3 is in an unlocked state. It is easy to implement, has high stability, and provides good support.

[0062] In other words, when the elastic connector 313 is engaged, the upper seat 310, the spacer 312, and the lower seat 311 are kept in a clamped state. At this time, the ball head cavity is the smallest and can best implement the clamping and locking of the ball head f30. Once the lower seat 311 and the upper seat 310 are relatively spread apart, the ball head cavity becomes larger. At this time, it is unlocked, and the ball seat f31 can be adjusted in all directions relative to the ball head f30.

[0063] Specifically, the spacer 312 includes an upper ball a and a lower ball b integrally formed, and the upper seat 310 and the lower seat 311 are respectively provided with mounting grooves that match the upper ball a and the lower ball b. In this way, with relatively movable ball joints, the upper and lower seats have more room to move after unlocking, which is more conducive to the implementation of universal rotation adjustment, and the noise during rotation is low, and the wear on the ball head is small.

[0064] The flexible connector 313 uses conventional connecting bolts and flexible gaskets.

[0065] The locking element f4 is inserted into the gap formed by the upper seat 310 and the lower seat 311. When unlocking, the locking element f4 pushes the lower seat 311 apart relative to the upper seat 310. This implementation method is simple, and the resulting locking and unlocking method is easy to operate.

[0066] The locking element f4 includes a locking tongue f40 rotatably supported at the bottom of the upper seat 310 with one end extending into the interval area, and an operating lever f41 connected to the other end of the locking tongue f40. When the operating lever f41 is lifted upward, the locking tongue f40 moves downward around the support point, causing the lower seat 311 to move away from the upper seat 310 and unlock. When the operating lever f41 is released, the locking tongue f40 returns to its original position under its own weight, and the lower seat 311 returns to its original position and clamps onto the ball head f30 to form a lock. No reset component is required, and rapid reset is achieved using the lever principle.

[0067] Specifically, the upper seat 310 and the locking tongue f40 are connected by ball bearings f42, and a guide support frame f5 is formed at the bottom of the support plate f10. When the locking tongue f40 disengages from the lower seat 311, it is mounted on the guide support frame f5 by the operating lever f41. This implementation method facilitates assembly and connection. At the same time, the use of relatively movable ball bearings not only facilitates assembly, but also makes it more flexible for unlocking and locking.

[0068] In this example, there are two spacers 312 and two balls f42, with the two spacers 312 and the two balls f42 distributed on opposite sides of the ball head f30.

[0069] The guide support frame f5 includes a U-shaped base frame f50 with an opening facing the support frame plate f10, and connecting pieces f51 that open upward and outward from both sides of the opening of the U-shaped base frame f50, wherein the connecting pieces f51 are fixed to the bottom of the support frame plate f10.

[0070] The operating lever f41 extends along the length of the support plate f10 and passes through the U-shaped base frame f50.

[0071] In this example, the operating lever f41 includes an extension arm 410 passing through the U-shaped base frame f50 and connected at one end to the locking tongue f40, and a handle 411 located at the other end of the extension arm 410. The extension arm 410 moves relative to or away from the support plate f10 along the side wall of the U-shaped base frame f50 to unlock or lock the universal joint f3. This makes the lever movement more stable. At the same time, the handle 411 extends along the width direction of the support plate f10, which facilitates manual operation by the user.

[0072] In summary, the implementation process of the armrest omnidirectional adjustment in this embodiment is as follows:

[0073] Holding the handle lever 411 and lifting it upwards, the locking tongue f40 rotates around the ball bearing f42, and pushes the lower seat 311 downwards. At this time, the ball head cavity formed between the upper seat 310 and the lower seat 311 becomes larger and separates from the surface of the ball head f30. Therefore, while keeping the handle lever 411 raised (that is, keeping the locking tongue f40 open to push the ball head cavity), the ball seat f31 rotates freely and omnidirectionally relative to the ball head f30, thereby adjusting the support frame plate f10 and the support frame lever f11 to the required angle. After the angle adjustment is completed, release the handle lever 411. At this time, the handle lever 411 returns to its original position along the U-shaped base frame f50 and is supported on the U-shaped base frame f50. At the same time, the locking tongue f40 also gradually returns to its original position, and the lower seat 311 also returns to its original position. The ball head cavity gradually becomes smaller until the ball head cavity is clamped from the inner wall onto the surface of the ball head f30, thus locking it and completing the positioning of the armrest after angle adjustment.

[0074] In summary, the process of adjusting the handrail height in this embodiment is as follows:

[0075] Driven by the drive motor M and driven by the drive shaft S, the first coupling Q1 and the second coupling Q2 are adjusted synchronously according to actual needs. Once the synchronous adjustment is confirmed, the drive shaft S operates synchronously with the first transmission shaft C1 and the second transmission shaft C2, which drives the transmission gear d10 to rotate and drives the corresponding transmission rack d11 to move up and down, thereby realizing the synchronous up and down lifting of the two handrails F.

[0076] Therefore, this handrail has the following advantages:

[0077] 1. With the omnidirectional joint unlocked or locked, the handrail frame can be adjusted to any angle, and it can be freely locked when the locking part loses external force, which is very convenient to implement. Therefore, it can meet the handrail angle support required by different doctors when working or resting.

[0078] 2. The ball seat's own elastic tightening design, combined with the spacing and rolling support of the lower ball, allows for greater freedom of movement once unlocked. This makes it easier to adjust the armrest angle and further reduces wear and noise on the ball head surface.

[0079] 3. By using the force combination of the lever and its own weight, the locking tongue can be automatically reset without the need for additional external components. Therefore, the structure is simple and the operation is convenient.

[0080] 4. The two handrails can be adjusted synchronously or by a height difference to meet the height requirements of doctors under different working conditions. Moreover, the angle of the handrails can also be adjusted when adjusting the height.

[0081] Combination Figure 9 As shown, the chair Y includes a seat part 1 having a base 10 and a seat cushion 11, a backrest part 2 having a backrest 20 and a backrest cushion 21, and a seat post 3.

[0082] Combination Figures 10 to 12 As shown, the base 10 includes a fixed seat 100, a slide 101 that is slidably disposed on the fixed seat 100 along the front-back direction of the fixed seat 100, a seat plate 102 disposed on the slide 101, and a cushion 11 mounted on the seat plate 102.

[0083] The seat post 3 includes an inner sleeve post 30 and an outer sleeve post 31. The inner sleeve post 30 is fixed to the chassis P of the doctor's chair from the lower end, and the outer sleeve post 31 is arranged to move up and down relative to the inner sleeve post 30 along the length direction, and its upper end is fixed to the fixed seat 100.

[0084] Combination Figure 13 and Figure 14 As shown, the seat adjustment structure includes a flipping mechanism 12 disposed between the slide 101 and the seat plate 102 to drive the seat plate 102 to flip around the horizontal direction, and a lifting mechanism 13 for driving the inner sleeve rod 30 and the outer sleeve rod 31 to extend or shorten relative to each other.

[0085] In this example, a slide rail 100a extending in the front-back direction is provided on the fixed base 100. The slide 101 includes a base body a slidably disposed on the slide rail 100a, a control arm b connected to the base body a and capable of being locked relative to the fixed base 100, and a mounting seat c disposed on the base body a. The base plate 102 is mounted on the mounting seat c.

[0086] Specifically, the control arm b extends forward from the front end of the seat body a and is located below the seat portion 1. The control arm b is rotatably mounted on the seat body a from the rear end, and a tension spring h is provided between the control arm b and the seat body a to keep them in relative contact. Multiple insertion slots x are formed on the fixed base 100 distributed along the front-rear direction. Insertion connectors b1 that match the insertion slots x are formed on the control arm b. During adjustment, the control arm b flips upward around the rear end, the tension spring h is stressed, and the insertion connector b1 of the control arm b disengages from the insertion slot x, causing the seat portion 1 to move back and forth. When the control arm b loses external force, the tension spring h returns to its original position, and the insertion connector b1 inserts into the insertion slot x. In this way, the fore-and-aft position adjustment of the seat can be conveniently achieved during the movement and reset of the control arm.

[0087] The mounting base c includes a seat hopper c1 with an upward-facing opening, a connecting rod c2 fixed to the base body a, and a seat sleeve c3 disposed in the seat hopper c1 and having an engagement with the connecting rod c2. The base plate 102 is rotatably connected to the upper part of the front end of the seat hopper c1 via a horizontally extending pivot. In this way, the base plate can close the seat hopper and facilitates the docking of the seat hopper and the base body.

[0088] A sliding groove c10 is formed at the front end of the seat c1, which is arranged from top to bottom. The seat part 1 also includes a flipping mechanism 12 disposed between the slide 101 and the seat plate 102 to drive the seat plate 102 to flip around the horizontal direction.

[0089] Specifically, the tilting mechanism 12 includes a slider 120 slidably disposed in the slide groove c 10, a connecting module 121 fixed to the rear of the seat plate 102, a support rod 122 rotatably connected at both ends between the slider 120 and the connecting module 121, and a locking member 123 for locking the slider 120 relative to the seat c 1. In this way, the angle at which the seat plate tilts around the pivot can be controlled by manipulating the position of the slider.

[0090] Specifically, the support rod 122 is a telescopic rod, and can be a pneumatic cylinder, hydraulic cylinder, or electric cylinder. This allows the position of the slider to be controlled by further changing the length of the support rod, thereby making the seat plate present the required angle.

[0091] In this example, strut 122 is a gas spring.

[0092] An inner support frame c11 is also provided inside the seat c1, and the tilting mechanism 12 also includes a top support component 124 disposed between the front and rear of the seat plate 102 and mounted on the inner support frame c11. This further enhances the support provided by the seat plate.

[0093] The inner support frame c11 includes a diagonal brace c110 with one end fixed to the front end of the seat c1 and the other end supported on the seat cover c3; a support plate c111 for positioning the diagonal brace c110 on the bottom plate of the seat c1; and a top support component 124 including a first component d1 disposed on the diagonal brace c110 and a second component d2 disposed on the seat plate 102, wherein the first component d1 and the second component d2 are rotatably connected. This rotatable adjustment accommodates any angle change while maintaining effective support at all times.

[0094] In this example, a connecting bolt is provided on the diagonal brace c 110, and a ball head is formed at the upper end. A connecting head is provided at the corresponding position on the seat plate 102, and the connecting head and the ball head are rotatably connected in a wrapping manner. That is to say, the first component d1 is the ball head component; the second component d2 is the ball seat component.

[0095] The backrest 20 includes a lower backrest 200 whose lower end is connected to the slide 101, an upper backrest 201 that rotates with the lower backrest 200 and moves and adjusts along the length of the lower backrest 200, and a cushion 21 is mounted on the upper backrest 201.

[0096] A notch is formed at the rear of the seat plate 102, and the lower support rod 200 is connected to the slide 101 from the lower end through a connecting shaft, and the upper end of the lower support rod 200 protrudes from the notch and is located above the seat cushion 21.

[0097] The upper backrest 201 includes a first rod g1 that rotates and locks to the upper part of the lower backrest 200 in a horizontal direction, a second rod g2 that is movably mounted on the first rod g1 along its length, and a locking part g3 that locks the first rod g1 and the second rod g2 relative to each other. This design has two advantages: 1. It allows for adjustment of the backrest's tilt angle; 2. It allows for adjustment of the backrest's extension height. In other words, whether it's the angle or the height, the ultimate goal is to meet the needs of doctors during work or rest.

[0098] In this example, the cushion 21 is positioned on the upper part of the second rod g2. This allows the position of the cushion 21 to be adjusted by adjusting the second rod g2, thereby providing comfortable support for the backrest 2 at a suitable position and angle.

[0099] Meanwhile, there are two seat rods 3, and a rod sleeve 32 is formed on the outer periphery of each inner rod 30. A ball bearing 33 is provided on the rod sleeve 32. The inner wall of the outer rod 31 is in contact with the ball bearing 33 and moves up and down along the length of the inner rod 30.

[0100] The lifting mechanism 13 includes a power lifting rod 130 disposed between the chassis P and the fixed base 100, and a limiting module 131 disposed at the lower end of each inner sleeve rod 30 and protruding outward from the outer periphery. The relative adjustment of the inner and outer sleeve rods is facilitated by the sliding and guiding of the ball bearings.

[0101] In this example, the power lifting boom 130 is a hydraulic cylinder, and a hydraulic pump station 132 is provided on the chassis.

[0102] Specifically, the limiting module 131 is a right-angled triangle, and is fixedly attached to the side of the inner sleeve rod 30 from one right-angled side, with the other right-angled side facing upward. When the seat rod 3 is in its shortest state, the lower end of the outer sleeve rod 31 abuts against the top right-angled side.

[0103] Furthermore, in this example, it should be further explained that when the upper backrest 201 and the lower backrest 200 rotate relative to each other and fold, the backrest 21 and the seat cushion 11 are positioned close together and fit side-by-side. This allows for easy folding and transportation.

[0104] In summary, the advantages of the chair seat in this embodiment are as follows:

[0105] 1. It can not only adjust the seat forward and backward and up and down, but also adjust the angle of the seat and backrest. In particular, the backrest itself can also be height adjusted, so that the seat can meet the optimal support required by different doctors when working or resting.

[0106] 2. The position and angle of the seat cushion and backrest are easy to adjust and convenient to implement. At the same time, with the support in the middle and rear, the chair seat has stable angle support.

[0107] 3. The structure is reasonably laid out, which can conceal and protect the flipping mechanism. Moreover, once the control arm loses external force, the tension spring returns to its original position, and the connector is inserted into the slot, which can be used to adjust the seat's fore-and-aft position, which is very convenient.

[0108] 4. The backrest and seat are easy to fold, and the small size makes them convenient for transportation.

[0109] In addition, the aforementioned wheel assembly E includes four wheels located at the four corners and a transmission component that drives the four wheels together, so that they can rotate in the same direction to move.

[0110] Meanwhile, a back handle and an external connector (such as a hanging part) can be added to the seat frame t2 of the chair seat Y.

[0111] The present invention has been described in detail above, but the present invention is not limited to the embodiments described above. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An adjustable physician chair, comprising a seat, armrests, and caster assemblies, wherein the seat includes a seat portion having a base and a cushion, a backrest portion having a backrest and a cushion, and a seat post, characterized in that: The base includes a fixed seat, a slide seat slidably mounted on the fixed seat along the front-rear direction, and a seat plate mounted on the slide seat. The fixed seat has a slide rail extending in the front-rear direction. A seat cushion is mounted on the seat plate. The backrest includes a lower support rod whose lower end abuts against the slide seat, and an upper support rod that rotates with the lower support rod and moves along the length of the lower support rod for adjustment. The backrest is mounted on the lower support rod and / or the upper support rod. When the upper and lower support rods rotate relative to each other and fold, the backrest and seat cushion are close together and fit together vertically. The slide seat includes a seat body slidably mounted on the slide rail, a control arm connected to the seat body and lockable relative to the fixed seat, and a mounting seat mounted on the seat body. The seat plate is mounted on the mounting seat. The mounting seat includes a seat bucket with an upward-facing opening, a connecting rod fixed to the seat body, and a seat sleeve disposed in the seat bucket and having an abutment against the connecting rod. The seat plate is rotatably connected to the upper part of the front end of the seat bucket via a horizontally extending pivot. A downward-facing sliding groove is formed at the front end of the seat bucket. The control arm extends from the seat body... The front end extends forward and is located below the seat. The control arm is rotatably mounted on the seat body from the rear end, and a tension spring is provided between the control arm and the seat body to keep the control arm and the seat body relatively in contact. Multiple insertion slots are formed on the fixed seat along the front-back direction, and a plug is formed on the control arm that matches the insertion slot. When the control arm is subjected to external force and is held under this external force, it disengages from the fixed seat and unlocks, and the slide slides along the length of the slide rail. When the external force on the control arm disappears, the control arm returns to its original position and locks with the fixed seat. During adjustment, the control arm flips upward around the rear end, the tension spring is stressed, and the plug of the control arm disengages from the insertion slot, and the seat body moves back and forth. When the external force on the control arm is lost, the tension spring returns to its original position, and the plug inserts into the insertion slot. The seat rod includes an inner sleeve rod and an outer sleeve rod. The doctor's chair also includes a seat adjustment structure, which includes a flipping mechanism disposed between the slide and the seat plate to drive the seat plate to flip around the horizontal direction, and a lifting mechanism for driving the inner sleeve rod and the outer sleeve rod to extend or shorten relative to each other.

2. The adjustable doctor's chair according to claim 1, characterized in that: The seat plate is rotatably connected to the front end of the slide via a pivot, and the seat plate conceals the flipping mechanism between the seat plate and the slide.

3. The adjustable doctor's chair according to claim 1, characterized in that: The inner sleeve rod is fixed to the chassis of the doctor's chair from the lower end, and the outer sleeve rod is arranged to move up and down relative to the inner sleeve rod along the length direction, with the upper end fixed to the fixed seat.

4. The adjustable doctor's chair according to claim 2 or 3, characterized in that: Multiple plug slots are arranged side by side to form two rows, the plugs are located on opposite sides of the control arm, and there are two tension springs, which are correspondingly distributed on opposite sides of the control arm.

5. The adjustable doctor's chair according to claim 1, characterized in that: The flipping mechanism includes a slider slidably disposed in the slide groove, a connecting module fixed to the rear of the seat plate, a support rod rotatably connected at both ends between the slider and the connecting module, and a locking member for locking the slider and the seat relative to each other. The support rod is a telescopic rod and is a cylinder, hydraulic cylinder or electric cylinder.

6. The adjustable doctor's chair according to claim 5, characterized in that: An internal support frame is also provided inside the seat compartment. The internal support frame includes a diagonal brace with one end fixed to the front end of the seat compartment and the other end supported on the seat cover; and a support plate for positioning the diagonal brace on the bottom plate of the seat compartment.

7. The adjustable doctor's chair according to claim 6, characterized in that: The flipping mechanism further includes a top support component disposed between the front and rear of the seat plate and mounted on the inner support frame. The top support component includes a first component disposed on the diagonal brace and a second component disposed on the seat plate, wherein the first component and the second component are rotatably connected.

8. The adjustable doctor's chair according to claim 1, characterized in that: A notch is formed at the rear of the seat plate and the cushion. The lower backrest is connected to the slide block from its lower end via a connecting shaft. The upper end of the lower backrest protrudes from the notch and is located above the cushion. The upper backrest includes a first rod that rotates and locks with the upper part of the lower backrest in a horizontal direction, a second rod that is movably disposed on the first rod along the length of the first rod, and a locking part that locks the first rod and the second rod relative to each other. The cushion is disposed on the upper part of the second rod.

9. The adjustable doctor's chair according to claim 1, characterized in that: The seat rod has two rods, and a rod sleeve is formed on the outer periphery of each inner rod. A ball bearing is provided on the rod sleeve. The inner wall of the outer rod is fitted with the ball bearing and moves up and down along the length of the inner rod. The lifting mechanism includes a power lifting rod disposed between the chassis of the doctor's chair and the fixed seat, and a limiting module disposed at the lower end of each inner rod and protruding outward from the outer periphery.

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