Doctor's chair with adjustable armrests

Abstract

The present invention discloses a doctor's chair with adjustable armrests, which includes a seat, armrests, and a wheel assembly, wherein the armrests are located on the left and right sides of the seat, and each armrest includes an armrest frame and an armrest pad, wherein the armrest frame includes a support frame plate and a support frame rod. The doctor's chair also includes an armrest adjustment structure, which includes an adjustment seat, a first adjustment rod and a second adjustment rod, a universal rotation joint, and a locking member. The present invention can not only implement synchronous or height difference position adjustment of the two armrests, but also implement arbitrary angle adjustment of the armrest frame, and implement free locking when the locking member loses external force. Therefore, it can meet the needs of different doctors when working or resting, and form the best support for the armrests of the chair at the required angle and height. At the same time, it has a simple structure, is easy to implement, and is low in cost.

Description

[0001] This application is a divisional application with the application date of November 19, 2021, application number 2021113756962, and the name of which is A Physician Chair. Technical Field

[0002] The invention belongs to the field of medical devices, and in particular relates to a physician chair with adjustable armrests. Background Art

[0003] As we all know, doctors are prone to physical fatigue when performing examinations or treatments for a long time. If they cannot relieve the fatigue of their limbs, their operations will become unstable, which will directly affect the results of the treatment or examination.

[0004] At present, for doctors' chairs, they include a seat, armrests and a walking wheel assembly. The seat and armrests used are generally fixed in position and cannot be adjusted. Therefore, when doctors are resting or working, the seat and armrests cannot provide support at the appropriate angle and position (mainly front and back and up and down). Moreover, due to the differences in doctors' body shapes, ordinary chairs can hardly meet the needs of work or rest. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an improved physician chair with adjustable armrests.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The invention relates to a doctor's chair with adjustable armrests, which comprises a seat, armrests and a walking wheel assembly, wherein the armrests are located on the left and right sides of the seat, each armrest comprises an armrest frame and an armrest pad, wherein the armrest frame comprises a support frame plate and a support frame rod, in particular, the doctor's chair also comprises an armrest adjustment structure, the armrest adjustment structure comprises an adjustment seat fixed to the seat, a first adjustment rod and a second adjustment rod movably arranged on the adjustment seat, a universal rotation joint connecting the support frame plate and the support frame rod of each armrest, and a locking member extending into the corresponding universal rotation joint and cooperating with the universal rotation joint to position the support frame plate and the support frame rod in a required position, the universal rotation joint comprises a ball head and a ball seat, the ball head is fixed to the support frame rod, and the ball seat is fixed to The bottom of the support frame plate, and the ball seat includes an upper seat and a lower seat forming a ball head cavity, and a spacer, wherein the upper seat is fixed to the bottom of the support frame plate, the spacer separates the upper seat and the lower seat relative to each other, and the lower seat elastically resists the spacer, and the locking member includes a locking tongue rotatably supported at the bottom of the upper seat and one end extending into the spacer area, an operating handle connected to the other end of the locking tongue, and the upper seat and the locking tongue are connected by ball bearings. A guide support frame is formed at the bottom of the support frame plate, and the locking tongue is mounted on the guide support frame from the operating handle when it is separated from the lower seat; there are at least two spacers, and two or more spacers are distributed on opposite sides of the ball head corresponding to the balls or distributed around the circumference of the ball head.

[0008] The universal joint allows for adjustment to any desired angle, meeting the needs of different physicians. The locking mechanism eliminates the need for a reset mechanism and utilizes the lever principle for rapid reset. Furthermore, the ball-jointed design facilitates assembly and provides greater flexibility for unlocking and locking.

[0009] and a second end of the lever arm extending along the length of the lever arm and adapted to move the lever back into engagement with the first end of the lever arm, the second end of the lever arm extending along the length of the lever arm, and the second end of the lever arm extending along the length of the lever arm.

[0010] According to a specific implementation of the present invention, the guide support frame includes a U-shaped base frame with an opening toward the support frame plate, and connecting plates that extend upward and relatively open to both sides from both sides of the U-shaped base frame opening, wherein the connecting plates are fixed to the bottom of the support frame plate, and the operating handle moves relatively close to or away from the support frame plate along the side wall of the U-shaped base frame to unlock or lock the universal joint.

[0011] In some specific embodiments, the support frame includes a rectangular panel and folded panels bent downwardly from both sides of the rectangular panel along its length. The armrest pad is integrally provided and includes a first pad fixed to the rectangular panel, and second and third pads respectively disposed on either side of the first pad along its length. The first, second, and third pads form a support area with an upward opening. This support area is not only comfortable but also provides a certain limiting effect, preventing the armrest from accidentally detaching from the armrest and losing support during work.

[0012] According to another embodiment of the present invention, the armrest adjustment structure further includes a drive motor, a drive wheel disposed on the base and rotating in a horizontal direction, a drive shaft extending from the center of the drive wheel and fixed thereto, a first coupling and a second coupling docked at both ends of the drive shaft, a first transmission shaft and a second transmission shaft connected to the first coupling and the second coupling, respectively, and a first transmission member connecting the first transmission shaft to the first adjustment rod, and a second transmission member connecting the second transmission shaft to the second adjustment rod, wherein the first coupling and the second coupling can operate synchronously, or one of the two can operate, or both can operate sequentially. Here, the coupling is equivalent to a commonly used clutch. Once separated, the transmission shaft and the drive shaft cannot move synchronously; only when the clutch is engaged can the transmission shaft and the drive shaft move synchronously. In this way, the use needs under different working conditions can be met.

[0013] Preferably, the first transmission member and the second transmission member have the same structure, and the first transmission member includes a transmission gear fixed on the first transmission shaft, a transmission rack movably arranged on the seat frame and cooperating with the transmission gear, wherein the transmission rack is fixedly connected to the first adjusting rod.

[0014] According to another embodiment of the present invention, each spacer includes an upper sphere and a lower sphere integrally formed therewith, with the upper and lower seats each having a mounting groove that matches the upper and lower spheres. In some embodiments, when the operating handle is lifted upward, the locking tongue moves the lower seat downward about a support point, moving the lower seat away from the upper seat to unlock the space. When the operating handle is released, the locking tongue returns to its original position under the weight of the operating handle, and the lower seat returns to its original position and clamps onto the ball head to form a lock.

[0015] According to another embodiment of the present invention, the locking member is inserted into the space formed by the upper seat and the lower seat, and when unlocked, the locking member opens the lower seat relative to the upper seat. This embodiment is simple and the locking and unlocking method formed is easy to operate.

[0016] According to another embodiment of the present invention, each spacer comprises an upper sphere and a lower sphere integrally formed therewith, with mounting slots for the upper and lower spheres, respectively, being provided on the upper and lower seats. The relatively movable balls provide greater freedom of movement between the upper and lower seats after unlocking, further facilitating universal rotation adjustment, while also achieving low noise and minimal wear on the ball heads.

[0017] In addition, the upper seat and the lower seat are relatively elastically connected via a connecting bolt and an elastic gasket arranged along a direction perpendicular to the extension of the upper seat.

[0018] Preferably, the adjustment seat comprises a seat body and a seat frame extending horizontally to both sides, and a first adjustment rod and a second adjustment rod are movably and adjustably arranged at both ends of the seat frame. 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.

[0019] Due to the implementation of the above technical solution, the present invention has the following advantages compared with the prior art:

[0020] The present invention can not only implement synchronous or height difference position adjustment of the two armrests, but also implement arbitrary angle adjustment of the armrest frame, and implement free locking when the locking piece loses external force. Therefore, it can meet the needs of different doctors to form optimal support for the armrests of the chair at the required angle and height when working or resting. At the same time, it has a simple structure, is easy to implement, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 It is a structural schematic diagram of the physician chair of the present invention;

[0023] Figure 2 for Figure 1 Structural diagram of the middle armrest adjustment structure;

[0024] Figure 3 for Figure 2 Schematic diagram of the local structure;

[0025] Figure 4 It is a schematic diagram of the structure of the handrail of the present invention;

[0026] Figure 5 for Figure 4 The main schematic diagram of

[0027] Figure 6 for Figure 4 Schematic top view of

[0028] Figure 7 for Figure 6 AA-direction cross-sectional view;

[0029] Figure 8 for Figure 4 Schematic diagram of the local structure;

[0030] Figure 9 for Figure 1 Structural diagram of the middle seat and seat adjustment structure;

[0031] Figure 10 for Figure 9 Schematic diagram of the local structure;

[0032] Figure 11 for Figure 10 Schematic top view of

[0033] Figure 12 for Figure 11 BB-direction cross-sectional view;

[0034] Figure 13 for Figure 9 A partial schematic diagram of

[0035] Figure 14 for Figure 13 Schematic diagram of the left side;

[0036] Wherein: F, armrest; T, adjustment seat; t1, seat body; t2, seat frame; t20, frame sleeve; G1, first adjustment rod; G2, second adjustment 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 member;

[0037] D2, second transmission member; d10, transmission gear; d11, transmission rack; f1, armrest frame; f10, support frame plate; f100, rectangular panel; f101, folding plate; f11, support frame rod; 110, main rod; 111, auxiliary rod; f2, armrest pad; f21, first pad body; f22, second pad body; f23, third pad body; f3, universal joint; f30, ball head; f31, ball seat; 310, upper seat; 311, lower seat; 312, spacer; a, upper sphere; b, lower sphere; 313, elastic connector; f4, locking member; f40, lock tongue; f41, operating handle; 410, extension arm rod; 411, handle rod; f42, ball bearing; f5, guide support frame; f50, U-shaped base frame; f51, connecting piece.

[0038] Y, chair seat; 1, seat portion; 10, base; 100, fixed seat; x, plug slot; 100a, slide rail; 101, slide seat; a, seat body; b, control arm; b 1, plug connector; c, mounting seat; c 1, seat bucket; c 10, slide slot; c 11, inner support frame; c 110, diagonal support; c111, support plate; c 2, connecting rod; c 3, seat cover; h, tension spring; 102, seat plate; 11, seat cushion; 12, flip mechanism; 120, slider; 121, connecting module; 122, support rod; 123, locking piece; 124, top support component; d 1, first component; d2, second component; 2, chair portion; 20, backrest; 200, lower support rod; 201, upper support rod; g 1. First rod; g2. Second rod; 21. Cushion; 3. Seat post; 30. Inner rod; 31. Outer rod; 32. Rod sleeve; 33. Ball bearing;

[0039] 13. Lifting mechanism; 130. Power lifting rod; 131. Limiting module; 132. Hydraulic pump station;

[0040] P, chassis; E, running wheel assembly. DETAILED DESCRIPTION

[0041] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0044] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate 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 implementation methods.

[0047] like Figure 1 As shown, the physician chair seat of this embodiment includes a chair seat Y, armrests F and a walking wheel assembly E, an armrest adjustment structure, and a chair seat adjustment structure, wherein there are two armrests F, which are located on opposite sides of the chair seat Y.

[0048] Specifically, each armrest F includes an armrest frame f1 and an armrest pad f2, wherein the armrest frame f1 includes a support frame plate f10 and a support frame rod f11.

[0049] Combine Figure 2 and Figure 3As shown, the armrest adjustment structure includes an adjustment seat T fixed on the chair seat Y, a first adjustment rod G1 and a second adjustment rod G2 that are movable up and down on the adjustment seat T, a universal rotation joint f3 connecting the support frame plate f10 and the support frame rod f11 of each armrest F, and a locking member f4 that extends into the corresponding universal rotation joint f3 and cooperates with the universal rotation joint f3 to position the support frame plate f10 and the support frame rod f11 at the required position.

[0050] The ends of the support frame rod f11 away from the support frame plate f10 are fixedly connected to the first adjustment rod G1 and the second adjustment rod G2 respectively, and the first adjustment rod G1 and the second adjustment rod G2 are adjusted up and down synchronously, successively or independently.

[0051] Specifically, the adjustment seat T includes a seat body t1 and a seat frame t2 extending horizontally to both sides. The first adjustment rod G1 and the second adjustment rod G2 are respectively movably and adjustably arranged at the two ends of the seat frame t2.

[0052] 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 fixed thereto, a first coupling Q1 and a second coupling Q2 abutting the ends of the drive shaft S, a first transmission shaft C1 and a second transmission shaft C2 connected to the first coupling Q1 and the second coupling Q2, respectively, and a first transmission member D1 connecting the first transmission shaft C1 to the first adjustment rod G1, and a second transmission member D2 connecting the second transmission shaft C2 to the second adjustment rod G2. The first coupling Q1 and the second coupling Q2 can operate synchronously, or one of them can operate, or both can operate sequentially. The coupling is equivalent to a conventional clutch; once disengaged, the transmission shaft and the drive shaft cannot move synchronously; only when the clutch is engaged can the transmission shaft and the drive shaft move synchronously, thus meeting the requirements of different operating conditions.

[0053] Specifically, the first transmission member D1 and the second transmission member D2 have the same structure. Therefore, if the structure of the first transmission member D1 is clear, the structure of the second transmission member D2 is also clear.

[0054] Similarly, the structures of the first coupling Q1 and the second coupling Q2 are also the same.

[0055] In this example, the first transmission member D1 includes a transmission gear d10 fixed on the first transmission shaft C1, and a transmission rack d11 movably arranged on the seat frame t2 and cooperating with the transmission gear d10, wherein the transmission rack d11 is fixedly connected to the first adjustment rod G1.

[0056] Specifically, a frame sleeve t20 extending vertically is formed at the end of the seat frame t2, and the transmission rack d11 is movably arranged in the frame sleeve t20. In this way, the stability of the vertical movement is further improved.

[0057] Combine Figure 4 and Figure 5 As shown, the armrest frame f1 includes a support frame plate f10 and a support frame rod f11, wherein the support frame plate f10 includes a rectangular panel f100 and folding plates f101 bent downward from both sides of the length direction of the rectangular panel f100, and the support frame rod f11 includes a main rod 110 and an auxiliary rod 111, wherein the universal joint f3 connects the main rod 110 to the rectangular panel f100, and the auxiliary rod 111 is connected to the doctor's chair.

[0058] In this example, the rectangular panel f100 and the folding plate f101 are integrally formed and are sheet metal parts.

[0059] Combine Figure 6 As shown, the armrest pad f2 is also integrated and comprises a first pad f21 secured to the rectangular panel f100, and second and third pads f22 and f23, respectively, positioned on either side of the first pad f21's longitudinal axis. These pads form a support area with an upward opening. This creates a comfortable support area while also providing a certain degree of restraint, preventing the armrest from accidentally detaching and losing support during work.

[0060] The universal joint f3 is disposed near the front end of the support frame plate f10 , and the locking member f4 extends along the length direction of the support frame plate f10 toward the other end, with the extended end portion located below the corresponding end portion of the support frame plate f10 .

[0061] In this example, the armrest pad f2 is a commonly used flexible pad.

[0062] Combine Figure 7 As shown, locking member f4 can extend into universal joint f3 and cooperate with it to position support frame plate f10 and support frame rod f11 at the desired position. Simultaneously, when subjected to an external force and maintained under force, locking member f4, along with universal joint f3 and support frame plate f10, can be universally rotated relative to support frame rod f11. Once the external force on locking member f4 is removed, locking member f4 locks universal joint f3, fixing the relative positions of support frame plate f10 and support frame rod f11. This allows for adjustment of any desired angle using the universal joint, thus meeting the needs of different physicians.

[0063] Combine Figure 8As shown, the universal joint f3 includes a ball head f30 and a ball seat f31, wherein the ball head f30 is fixed on the main rod 110 and the ball seat f31 is fixed on the bottom of the rectangular panel f100. This arrangement is mainly for easy assembly and also facilitates the stable implementation of the armrest position adjustment.

[0064] The ball seat f31 comprises an upper seat 310 and a lower seat 311, which form a 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 and lower seats 310 and 312. The elastic connector 313 elastically abuts the lower seat 311 against the spacer 312. When the upper and lower seats 310 and 311 are clamped relative to each other on the opposing surfaces of the ball head f30, the universal joint 3 is locked. When the upper and lower seats 310 and 311 are separated from each other and away from the surface of the ball head f30, the universal joint 3 is unlocked. This design is easy to implement, offers high stability, and provides excellent support.

[0065] That is to say, when the elastic connecting piece 313 is connected, 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 formed is the smallest, and the ball head f30 can be clamped and locked in the best way. Once the lower seat 311 and the upper seat 310 are relatively stretched apart, the ball head cavity becomes larger and is unlocked. At this time, the ball seat f31 can be universally adjusted relative to the ball head f30.

[0066] Specifically, spacer 312 comprises an upper sphere a and a lower sphere b, integrally formed from one another. Upper and lower seats 310 and 311 are each provided with mounting slots that mate with upper and lower spheres a and b. This increases the space between the upper and lower seats for relative movement after unlocking, facilitating universal rotation adjustment, while also reducing noise and wear on the ball heads.

[0067] The elastic connecting member 313 adopts a conventional connecting bolt and an elastic gasket.

[0068] The locking member f4 is inserted into the space formed by the upper seat 310 and the lower seat 311. When unlocked, the locking member f4 opens the lower seat 311 relative to the upper seat 310. This embodiment is simple, and the locking and unlocking method formed is easy to operate.

[0069] The locking element f4 comprises a locking tongue f40, rotatably supported at the bottom of the upper seat 310, one end of which extends into the spacer, 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 the lower seat 311 downward about its support point, moving it away from the upper seat 310 and unlocking the lock. When the operating lever f41 is released, the locking tongue f40 returns to its original position under the weight of the operating lever f41, and the lower seat 311 returns to its original position, clamping onto the ball head f30 to lock the lock. This eliminates the need for a reset element and utilizes the principle of leverage to achieve rapid reset.

[0070] Specifically, the upper seat 310 and the lock tongue f40 are connected by a ball bearing f42, and a guide support frame f5 is formed at the bottom of the support frame plate f10. When the lock tongue f40 is separated from the lower seat 311, the self-operating handle f41 is mounted on the guide support frame f5. This embodiment facilitates assembly and connection, and the use of relatively movable ball bearings not only facilitates assembly but also provides greater flexibility for unlocking and locking operations.

[0071] In this example, there are two spacers 312 and two balls f42 , wherein the two spacers 312 and the two balls f42 are correspondingly distributed on opposite sides of the ball head f30 .

[0072] The guide support frame f5 includes a U-shaped base frame f50 with an opening toward the support frame plate f10, and connecting pieces f51 extending upward and relatively open to 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.

[0073] The operating handle f41 extends along the length of the support frame plate f10 and passes through the U-shaped base frame f50.

[0074] In this example, the operating lever f41 comprises an extension arm 410 extending through the U-shaped chassis f50 and connected to the locking tongue f40 at one end, and a handle 411 disposed at the other end of the extension arm 410. The extension arm 410 moves along the sidewall of the U-shaped chassis f50, moving toward or away from the support frame f10, to unlock or lock the universal joint f3. This stabilizes the lever's movement. Furthermore, the handle 411 extends along the width of the support frame f10, facilitating manual operation.

[0075] In summary, the implementation process of the universal adjustment of the armrest in this embodiment is as follows:

[0076] When the handle rod 411 is lifted upward, the locking tongue f40 rotates around the ball f42 and pushes the lower seat 311 downward. At this time, the ball head cavity formed between the upper seat 310 and the lower seat 311 becomes larger and is relatively separated from the surface of the ball head f30. Therefore, under the condition of keeping the handle rod 411 lifted upward (that is, keeping the locking tongue f40 to push the ball head cavity), the ball seat f31 is free and universally rotated relative to the ball head f30, thereby adjusting the support frame plate f10 and the support frame rod f11 to the required angle. When the angle adjustment is completed, the handle rod 411 is released. At this time, the handle rod 411 is reset downward along the U-shaped base frame f50 and supported on the U-shaped base frame f50. At the same time, the locking tongue f40 is gradually reset, and the lower seat 311 is also reset synchronously. The ball head cavity gradually becomes smaller until the ball head cavity is clamped on the surface of the ball head f30 from the inner wall, and is locked, thereby completing the armrest positioning after the angle adjustment.

[0077] In summary, the height process of the handrail in this embodiment is as follows:

[0078] The drive motor M operates, and under the drive of the drive shaft S, it determines whether 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, and at the same time drives the transmission gear d10 to rotate and drives the corresponding transmission rack d11 to move up and down, thereby implementing the synchronous up and down lifting of the two handrails F.

[0079] Therefore, this handrail has the following advantages:

[0080] 1. When the universal joint is unlocked or locked, the armrest can be adjusted to any angle, and can be locked freely when the locking part loses external force. This is very convenient to implement, and can meet the armrest angle support required by different doctors when working or resting;

[0081] 2. The elastic tightening design of the ball seat itself, coupled with the spacing and rolling support of the lower ball, once unlocked, the relative freedom of movement of the ball seat will be greater, which is more conducive to adjusting the angle of the armrest and further reduces wear and noise on the surface of the ball head;

[0082] 3. The lever and its own weight are used to coordinate the forces, which can realize the automatic reset of the lock tongue without adding any external components. Therefore, the structure is simple and the operation is convenient.

[0083] 4. The two armrests can be adjusted synchronously or in a height difference manner to meet the height requirements of doctors under different working conditions. Moreover, when adjusting the height, the angle of the armrests can also be adjusted.

[0084] Combine Figure 9 As shown, the chair seat Y includes a seat portion 1 having a base 10 and a seat cushion 11 , a backrest portion 2 having a backrest 20 and a back cushion 21 , and a seat post 3 .

[0085] Combine Figures 10 to 12 As shown, the base 10 includes a fixed base 100 , a slide 101 slidably arranged on the fixed base 100 along the front-rear direction of the fixed base 100 , a seat plate 102 arranged on the slide 101 , and the seat cushion 11 is installed on the seat plate 102 .

[0086] The seat rod 3 includes an inner sleeve rod 30 and an outer sleeve rod 31, wherein the inner sleeve rod 30 is fixed to the chassis P of the physician's chair from the lower end, and the outer sleeve rod 31 is arranged to move up and down relative to each other along the length direction of the inner sleeve rod 30, and the upper end is fixed to the fixed seat 100.

[0087] Combine Figure 13 and Figure 14As shown, the seat adjustment structure includes a flip mechanism 12 arranged 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 rod 30 and the outer rod 31 to extend or shorten relative to each other.

[0088] In this example, a slide rail 100a extending along the front-to-back direction is provided on the fixed seat 100, and the slide seat 101 includes a seat body a slidingly set on the slide rail 100a, a control arm rod b connected to the seat body a and capable of being locked relative to the fixed seat 100, and a mounting seat c set on the seat body a, and the seat plate 102 is installed on the mounting seat c.

[0089] Specifically, the control arm b extends forward from the front end of the seat body a and is positioned below the seat portion 1. The control arm b is pivoted from its rear end onto the seat body a, and a tension spring h is interposed between the control arm b and the seat body a to maintain relative engagement with the control arm b. The fixed seat 100 is formed with a plurality of insertion slots x distributed along the front-to-back direction, and the control arm b is formed with connectors b1 that match the insertion slots x. During adjustment, the control arm b flips upward around its rear end, applying force to the tension spring h, and the connectors b1 of the control arm b disengage from the insertion slots x, allowing the seat portion 1 to move forward or backward. When the control arm b loses the external force, the tension spring h resets, and the connectors b1 reengage into the insertion slots x. In this way, the fore-and-aft position of the seat can be conveniently adjusted while the control arm moves and resets.

[0090] Mounting base c comprises a bucket c1 with an upward opening, a connecting rod c2 secured to the base a, and a seat sleeve c3 disposed within bucket c1 and connected to connecting rod c2. A seat plate 102 is pivotally connected to the upper front end of bucket c1 via a horizontally extending pivot. This allows the seat plate to close the bucket and facilitate docking between the bucket and the base a.

[0091] A slide groove c10 is formed at the front end of the seat bucket c1 and is arranged from top to bottom. The seat part 1 also includes a flipping mechanism 12 arranged between the slide 101 and the seat plate 102 to drive the seat plate 102 to flip around the horizontal direction.

[0092] Specifically, the tilting mechanism 12 includes a slider 120 that slides within the slide slot c10, a connecting module 121 fixed to the rear of the seat plate 102, a support rod 122 with its ends pivotally connected between the slider 120 and the connecting module 121, and a locking member 123 for locking the slider 120 relative to the seat bucket c1. In this way, the tilting angle of the seat plate around the pivot axis can be controlled by manipulating the position of the slider.

[0093] Specifically, the support rod 122 is a telescopic rod, and is a pneumatic cylinder, an oil cylinder or an electric cylinder. In this way, the position of the slider can be controlled by further changing the length of the support rod, so that the seat plate presents a required angle.

[0094] In this example, the support rod 122 is a gas spring.

[0095] An inner support frame c11 is further provided in the seat bucket c1, and the flip mechanism 12 further includes a supporting component 124 provided between the front and rear portions of the seat plate 102 and mounted on the inner support frame c11, thereby further enhancing the supporting effect provided by the seat plate.

[0096] The inner support frame c11 includes a diagonal brace c110, one end of which is fixed to the front end of the bucket c1 and the other end of which is supported on the seat cover c3. A support plate c111 is used to position the diagonal brace c110 on the bottom plate of the bucket c1. The top support component 124 includes a first component d1 mounted on the diagonal brace c110 and a second component d2 mounted on the seat plate 102. The first component d1 and the second component d2 are universally connected. This universal rotation allows for adjustment to accommodate any angle change while maintaining effective support.

[0097] In this example, a connecting bolt is provided on the diagonal support c 110, and a ball head is formed on the upper end. A connecting head is provided at the corresponding position of the seat plate 102, and the connecting head is partially connected to the ball head in a wrapping rotation manner. That is, the first component d1 is the ball head component; the second component d2 is the ball seat component.

[0098] The backrest 20 includes a lower leaning rod 200 whose lower end is connected to the slide 101, an upper leaning rod 201 that rotates with the lower leaning rod 200 and is movable and adjustable along the length direction of the lower leaning rod 200, and the cushion 21 is installed on the upper leaning rod 201.

[0099] A notch is formed at the rear of the seat plate 102 , and the lower leaning rod 200 is connected to the slide 101 from the lower end through a connecting shaft, and the upper end of the lower leaning rod 200 passes through the notch and is located above the seat cushion 21 .

[0100] The upper leaning bar 201 comprises a first rod g1 that pivots horizontally and locks with the upper portion of the lower leaning bar 200; a second rod g2 that is movably mounted on the first rod g1 along its length; and a locking portion g3 that locks the first and second rods g1 and g2 relative to each other. This arrangement offers two advantages: 1. It allows for adjustment of the backrest's inclination angle; and 2. It allows for adjustment of the backrest's extended height. In other words, whether adjusting the angle or height, the ultimate goal is to meet the physician's needs for work or rest.

[0101] In this example, the back cushion 21 is arranged on the top of the second rod g2. Like this, by the adjustment of the second rod g2, the position adjustment of the back cushion 21 is implemented, thereby providing the comfortable support of the backrest 2 in the right position and angle.

[0102] At the same time, there are two seat rods 3 mentioned above, and a rod sleeve 32 is formed on the outer periphery of each inner sleeve rod 30, and a ball 33 is provided on the rod sleeve 32. The inner wall of the outer sleeve rod 31 fits the ball 33 and moves up and down along the length direction of the inner sleeve rod 30.

[0103] The lifting mechanism 13 includes a power lifting rod 130 disposed between the chassis P and the fixing base 100, and a limit module 131 disposed at the lower end of each inner sleeve rod 30 and protruding outward from the outer circumference. Under the sliding and guiding of the ball, the relative adjustment of the inner and outer sleeve rods is facilitated.

[0104] In this example, the power lifting rod 130 is a hydraulic cylinder, and a hydraulic pump station 132 is provided on the chassis.

[0105] Specifically, the limiting module 131 is a right triangle, and one right-angled side is fixed to the side of the inner sleeve rod 30, and the other right-angled side is set upward. When the seat rod 3 is in the shortest state, the lower end of the outer sleeve rod 31 contacts the top right-angled side.

[0106] In addition, in this example, it should be further explained that when the upper leaning rod 201 and the lower leaning rod 200 are relatively rotated and folded, the back cushion 21 and the seat cushion 11 are relatively close and arranged in a vertically contact manner. In this way, the back cushion 21 and the seat cushion 11 can be folded for easy transportation.

[0107] In summary, the advantages of the chair seat of this embodiment are as follows:

[0108] 1. The seat can be adjusted not only forward and backward and up and down, but also at different angles, including the seat and backrest. In particular, the backrest itself can be adjusted in height, allowing the seat to meet the optimal support needs of different physicians when working or resting.

[0109] 2. The position and angle of the seat and back cushions are easy to adjust and implement. At the same time, with the middle support and tail support, the seat has a stable angle support;

[0110] 3. The structural layout is reasonable, and the flip mechanism can be concealed and protected. Once the control arm loses external force, the tension spring resets, and the plug connector is inserted into the socket, the front and rear position of the seat can be adjusted and positioned, which is very convenient.

[0111] 4. The backrest and seat are easy to fold, small in size and easy to transport.

[0112] In addition, the above-mentioned running wheel assembly E includes four running wheels located at the four corners, and a transmission member that connects the four running wheels, so that they can rotate in the same direction to move.

[0113] At the same time, a handle and an external joint (such as a pendant) can be added to the seat frame t2 of the chair seat Y.

[0114] The present invention has been described in detail above, but the present invention is not limited to the above embodiments. Any equivalent changes or modifications made based on the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A physician chair with adjustable armrests, comprising a seat, armrests, and a wheel assembly, wherein the armrests are located on the left and right sides of the seat, each armrest comprising an armrest frame and an armrest pad, wherein the armrest frame comprises a support frame plate and a support frame rod, and wherein: The doctor's chair also includes an armrest adjustment structure, which includes an adjustment seat fixed to the seat; a first and a second adjustment rod movably arranged on the adjustment seat; a universal rotation joint connecting the support frame plate and the support frame rod of each armrest; a locking member extending into the corresponding universal rotation joint and positioning the support frame plate and the support frame rod at a required position; a drive motor; a drive wheel arranged on the adjustment seat and rotating in a horizontal direction; a drive shaft passing through the center of the drive wheel and fixedly arranged; a first and a second coupling connected to the two ends of the drive shaft; a first and a second transmission shaft connected to the first and the second couplings respectively; and a first transmission member that transmission-connects the first transmission shaft to the first adjustment rod and a second transmission member that transmission-connects the second transmission shaft to the second adjustment rod, wherein the first and the second couplings can work synchronously, or one of the two can work, or the two can work one after the other; The universal rotating joint includes a ball head and a ball seat, the ball head is fixed on the support frame rod, the ball seat is fixed on the bottom of the support frame plate, and the ball seat includes an upper seat, a lower seat and a spacer that form a ball head cavity, wherein the upper seat is fixed on the bottom of the support frame plate, the spacer separates the upper and lower seats relative to each other, and the lower seat elastically contacts the spacer, the locking member includes a locking tongue rotatably supported on the bottom of the upper seat and one end extending into the spacer area, an operating handle connected to the other end of the locking tongue, and ball bearings are used to connect the upper seat and the locking tongue, and a guide support frame is formed at the bottom of the support frame plate. When the locking tongue is separated from the lower seat, the operating handle is mounted on the guide support frame; there are at least two spacers, and multiple spacers are distributed on opposite sides of the ball head corresponding to the balls or distributed at circumferential intervals around the ball head.

2. The armrest-adjustable physician chair according to claim 1, characterized in that: The ends of the support frame rod away from the support frame plate are fixedly connected to the first adjustment rod and the second adjustment rod respectively, and the first adjustment rod and the second adjustment rod are adjusted up and down synchronously, successively or independently, and the universal rotation joint is arranged near the front end of the support frame plate, and the locking piece extends toward the other end along the length direction of the support frame plate, and the extended end is located below the corresponding end of the support frame plate, wherein the locking piece is rotatably connected to the support frame plate in the shape of a balanced lever, and when subjected to external force and maintained under force, it is universally rotated and adjusted relative to the support frame rod together with the universal rotation joint and the support frame plate; after the external force on the locking piece is eliminated, the lever recovers under its own weight, and the locking piece locks the universal rotation joint, and the positions of the support frame plate and the support frame rod are relatively fixed.

3. The armrest-adjustable physician chair according to claim 2, characterized in that: The guide support frame includes a U-shaped base frame with an opening toward the support frame plate, and connecting pieces that extend upward and relatively open to both sides from both sides of the U-shaped base frame opening, wherein the connecting pieces are fixed to the bottom of the support frame plate, and the operating handle moves relatively close to or away from the support frame plate along the side wall of the U-shaped base frame to unlock or lock the universal joint.

4. The armrest-adjustable physician chair according to claim 3, characterized in that: The support frame plate includes a rectangular panel and folded plates bent downward from both sides of the rectangular panel in the length direction. The armrest pad is integrally arranged and includes a first pad body fixed on the rectangular panel, a second pad body and a third pad body respectively arranged on both sides of the length direction of the first pad body, wherein the first pad body, the second pad body and the third pad body constitute a supporting area with an opening facing upward.

5. The armrest-adjustable physician chair according to claim 1, characterized in that: The first transmission member and the second transmission member have the same structure, and the first transmission member includes a transmission gear fixed on the first transmission shaft, a transmission rack movably arranged on the seat frame and cooperating with the transmission gear, wherein the transmission rack is fixedly connected to the first adjusting rod.

6. The physician chair with adjustable armrests according to claim 1, characterized in that: Each of the spacers includes an upper sphere and a lower sphere integrally arranged above and below, and the upper seat and the lower seat are respectively provided with mounting grooves matching the upper sphere and the lower sphere.

7. The physician chair with adjustable armrests according to claim 1, characterized in that: When the operating handle is lifted upward, the lock tongue moves the lower seat downward around the support point to move away from the upper seat and unlock; when the operating handle is released, the lock tongue is reset under the weight of the operating handle, and the lower seat is relatively reset and clamped on the ball head to form a lock.

8. The physician chair with adjustable armrests according to claim 1, characterized in that: Each spacer comprises an upper sphere and a lower sphere which are integrally arranged in an upper and lower part. The upper seat and the lower seat are respectively provided with mounting grooves which match the upper sphere and the lower sphere.

9. The physician chair with adjustable armrests according to claim 1, characterized in that: The upper seat and the lower seat are relatively elastically connected via a connecting bolt and an elastic gasket arranged along a direction perpendicular to the extension of the upper seat.

10. The physician chair with adjustable armrests according to claim 1, characterized in that: The adjustment seat comprises a seat body and a seat frame extending horizontally to both sides, and a first adjustment rod and a second adjustment rod are respectively and movably arranged at two ends of the seat frame.

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