Dental chair base and dental chair

Abstract

The invention relates to the technical field of medical instruments, in particular to a dental chair base and a dental chair. The dental chair base comprises a supporting assembly and a rotating assembly; the supporting assembly comprises a first supporting piece and a second supporting piece, a through hole is formed in the first supporting piece, the second supporting piece is of an annular structure and is arranged above the first supporting piece, and the inner side annular wall of the second supporting piece protrudes out of the hole wall of the through hole; the rotating assembly comprises a first rotating piece and a second rotating piece which are clamped on the two sides of the second supporting piece in the thickness direction, the first rotating piece and the second rotating piece are fixedly connected, the first rotating piece is installed in the through hole, the lifting mechanism is installed on the first rotating piece, and a rotating piece is arranged between the second rotating piece and the second supporting piece; and the fit clearance between the supporting assembly and the rotating assembly is small, so that the amplitude of shaking which is finally transmitted to the chair frame is very small, and the stability of the chair seat in the horizontal rotating process is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a dental chair base and a dental chair. Background Art

[0002] A dental chair is a comprehensive dental treatment chair used to treat dental diseases. In a common dental chair structure, a large fixed base is set at the bottom, and a lifting mechanism is installed on the base. The lifting mechanism is used to realize the up and down movement of the dental chair. For example, see Chinese Patent 202411150995.X, in which the mounting seat is fixed, which makes it impossible for the dental chair to rotate in the horizontal direction, thereby increasing the difficulty of operation for medical staff during treatment, and making it easy for medical staff to feel tired or uncomfortable during long-term treatment. In addition, although some dental chairs can achieve horizontal rotation, their rotation will produce a large amplitude of shaking, and additional mechanisms need to be added, such as a locking motor to achieve locking, which leads to a complex base structure, high cost, and inconvenient maintenance. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a dental chair base and a dental chair to solve the problem that although the existing dental chair base can be rotated in the horizontal direction, it will produce a large amplitude of shaking, affecting the stability of the dental chair. If a locking motor is added to reduce the shaking, it will lead to a complex structure, high cost and inconvenient maintenance.

[0004] A first aspect of the present invention provides a dental chair base, wherein the dental chair base comprises: Lifting mechanism; A base, including a supporting assembly and a rotating assembly; The support assembly comprises a first support member and a second support member, the first support member is provided with a through hole, the second support member is formed into an annular structure and is arranged above the first support member, and the inner side ring wall of the second support member protrudes from the hole wall of the through hole; The rotating assembly includes a first rotating member and a second rotating member clamped on both sides of the second supporting member in the thickness direction, the first rotating member and the second rotating member are fixedly connected, the first rotating member is installed in the through hole, the lifting mechanism is installed on the first rotating member, and a rotating member is arranged between the second rotating member and the second supporting member.

[0005] Preferably, the base further comprises a locking assembly, wherein the locking assembly comprises: A fixed member, mounted on the second rotating member; A driving member, rotatably connected to the fixing member; A locking member forms a screw pair with the driving member; a first clamping portion that abuts against the fixing member and a second clamping portion that abuts against the second supporting member are formed on the locking member. The first clamping portion and the second clamping portion are arranged at an angle. Rotating the driving member causes the locking member to slide in a direction close to or away from the fixing member, so as to increase or decrease the extrusion force applied to the second rotating member and the second supporting member, such that the second rotating member and the second supporting member achieve rotational limitation when approaching each other.

[0006] Preferably, the locking assembly further includes: An adjusting member is formed as a cylindrical structure sleeved on the driving member. The fixing member is arranged on the outer wall of the adjusting member. The adjusting member can adjust the relative position between the driving member and the fixing member, thereby adjusting the extrusion force applied by the locking member to the fixing member and the second supporting member.

[0007] Preferably, the dental chair base further includes an anti-shake mechanism, and the anti-shake mechanism includes: A clamping assembly is located above the second rotating member. A connecting portion protruding from the second rotating member is arranged on the clamping assembly; A connecting sleeve is clamped between the connecting portion and the second supporting member; A fastening member sequentially passes through the connecting portion, the connecting sleeve, and a connecting hole on the second supporting member, thereby mounting the clamping assembly on the second supporting member. Preferably, the clamping assembly includes: A fixed seat is arranged above the second rotating member, and the connecting portion is arranged on the fixed seat; An adjusting block is arranged on one side of the fixed seat facing the second rotating member; A screwing member is connected to the fixed seat, and one end of the screwing member passing through the fixed seat abuts against the adjusting block.

[0008] Preferably, the connecting hole on the second supporting member is formed as a strip-shaped hole, and the fastening member can slide along the extending track of the strip-shaped hole; the wall thickness of one end of the connecting hole in its length direction is H1 to form a thin-wall side; the wall thickness of the other end of the connecting hole in its length direction is H2, and H2 > H1 to form a thick-wall side. In the depth direction of the connecting hole, the bottom of the thick-wall side protrudes from the bottom of the thin-wall side.

[0009] Preferably, a limiting protrusion protruding towards the anti-vibration mechanism is formed on the second rotating member. When the second rotating member drives the limiting protrusion to rotate until it abuts against the connecting sleeve, the limiting protrusion can push the connecting sleeve to move from the thin-wall side to the thick-wall side, so that the fastener drives the clamping assembly to move towards the second support member, thereby reducing the distance between the clamping assembly and the second rotating member.

[0010] Preferably, the dental chair base further includes: a reset mechanism installed in the installation groove formed on the second rotating member. The reset mechanism includes a reset stopper and an elastic member installed below the reset stopper. When the reset mechanism is not subject to external force, at least part of the reset stopper extends out of the installation groove and protrudes from the side wall of the second rotating member; Rotate the second rotating member in the first rotation direction so that the connecting sleeve moves from the thin-wall side to the thick-wall side, and the fastener drives the clamping assembly to move towards the second support member to reduce the distance between the clamping assembly and the second rotating member; rotate the second rotating member in the second rotation direction, which can drive the reset stopper to push the connecting sleeve away from the thick-wall side. When the connecting sleeve is pushed to move to the thin-wall side, the elastic member is torsionally deformed due to the obstruction of the thin-wall side and drives the reset stopper to rotate towards the direction of extending into the installation groove. When the second rotation direction is continued until the reset stopper is no longer blocked, the elastic member deforms and recovers to realize the reset of the reset stopper; the first rotation direction and the second rotation direction are opposite.

[0011] Preferably, the lifting mechanism is used to drive the chair frame to move up and down. There are two groups of anti-vibration mechanisms, and the two groups of anti-vibration mechanisms are arranged opposite to each other along the rotation axis of the rotating assembly; the length direction of the chair frame is the first direction, the width direction of the chair frame is the second direction, the first direction is perpendicular to the second direction, the anti-vibration mechanism is arranged within the included angle formed by the first direction and the second direction, and the included angle between the connection line of the anti-vibration mechanism and the rotation axis of the rotating assembly and the first direction is β, and 20° ≤ β ≤ 60°.

[0012] The second aspect of the present invention provides a dental chair, including the dental chair base according to any one of the above technical solutions.

[0013] Compared with the prior art, the beneficial effects of the present invention are: In the dental chair base of the present invention, the base includes a support assembly and a rotating assembly; the support assembly includes a first support member and a second support member. A through hole is formed in the first support member. The second support member is formed as an annular structure and is disposed above the first support member. The inner circumferential wall of the second support member protrudes from the hole wall of the through hole. The rotating assembly includes a first rotating member and a second rotating member clamped on both sides in the thickness direction of the second support member. The first rotating member and the second rotating member are fixedly connected. The first rotating member is installed in the through hole, and a lifting mechanism is installed on the first rotating member. A rotating member is provided between the second rotating member and the second support member. Thus, by rotating the rotating assembly relative to the support assembly, the horizontal movement of the chair frame is realized. In this way, medical staff can rotate the chair frame to a position convenient for their operation, improving the comfort of medical staff during the treatment process. The second support member is clamped between the first rotating member and the second rotating member, so that the fitting clearance between the support assembly and the rotating assembly is small. Therefore, the shaking amplitude generated when finally transmitted to the chair frame is also very small, thus ensuring the stability during the horizontal rotation of the seat.

[0014] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 A schematic structural diagram of the dental chair base provided by the embodiment of the present invention when the maximum rotation angle is fixed; Figure 2 A schematic structural diagram of the dental chair base provided by the embodiment of the present invention when the maximum rotation angle is fixed and the chair frame is in the unfolded state; Figure 3 A schematic structural diagram of the dental chair base provided by the embodiment of the present invention during the rotation process; Figure 4 A schematic structural diagram of the dental chair base provided by the embodiment of the present invention during the rotation process and the chair frame is in the unfolded state; Figure 5 For Figure 1 A schematic structural diagram of the base in the state; Figure 6 A schematic exploded view of the base of the dental chair base provided by the embodiment of the present invention; Figure 7A cross-sectional view of a vibration damping mechanism in the dental chair base provided by an embodiment of the present invention; Figure 8 For Figure 7 A schematic enlarged view of the structure at position A in Figure 9 An axial cross-sectional view of a connecting hole in the dental chair base provided by an embodiment of the present invention; Figure 10 A cross-sectional view of two vibration damping mechanisms in the dental chair base provided by an embodiment of the present invention; Figure 11 A cross-sectional view of a locking assembly in the dental chair base provided by an embodiment of the present invention; Figure 12 For Figure 11 A schematic enlarged view of the structure at position B in

[0017] Icon: 10 - chair frame; 11 - backrest frame; 12 - seat cushion frame; 13 - leg support; 20 - lifting mechanism; 30 - base; 31 - support assembly; 311 - first support member; 3111 - through hole; 312 - second support member; 3120 - second abutting portion; 310 - connecting hole; 31211 - thin wall side; 31212 - thick wall side; 3122 - receiving groove; 32 - rotating assembly; 321 - first rotating member; 322 - second rotating member; 3221 - limiting protrusion; 3222 - mounting groove; 323 - rotating member; 33 - locking assembly; 331 - fixing member; 3311 - first abutting portion; 332 - driving member; 3321 - driving end; 3322 - limiting convex portion; 333 - locking member; 3331 - first clamping portion; 3332 - second clamping portion; 40 - adjusting member; 41 - sleeve portion; 42 - rotating portion; 50 - vibration damping mechanism; 51 - clamping assembly; 510 - connecting portion; 511 - fixing seat; 512 - adjusting block; 513 - screwing member; 52 - connecting sleeve; 53 - fastening member; 60 - reset mechanism; 61 - protruding portion; 62 - inclined portion; 70 - connecting assembly; X - first direction; Y - second direction. Detailed Description of the Invention

[0018] The following detailed description is provided to assist the reader in obtaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be apparent after understanding the disclosure of the present application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, changes that will be apparent after understanding the disclosure of the present application may be made, except for operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

[0019] The features described herein can be implemented in various forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, devices, and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0020] Throughout the specification, when an element (such as a layer, region, or substrate) is described as "on" another element, "connected to" another element, "coupled to" another element, "above" another element, or "covering" another element, it can be directly "on" another element, "connected to" another element, "coupled to" another element, "above" another element, or "covering" another element, or there can be one or more other elements intervening therebetween. In contrast, when an element is described as "directly on" another element, "directly connected to" another element, "directly coupled to" another element, "directly above" another element, or "directly covering" another element, there can be no other elements intervening therebetween.

[0021] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0022] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or parts, these components, elements, regions, layers, or parts are not limited by these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or part from another. Thus, the first component, element, region, layer, or part referred to in the examples described herein may also be referred to as the second component, element, region, layer, or part without departing from the teachings of the examples.

[0023] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another as shown in the figures. Such spatial relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations of "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0024] The terms used herein are for describing various examples only and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprising", "including" and "having" enumerate the stated features, quantities, operations, components, elements and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof.

[0025] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0026] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0027] A dental chair base according to a first aspect of the present invention includes a chair frame 10, a lifting mechanism 20, and a base 30.

[0028] Hereinafter, the specific structures of the above components of the dental chair base according to the present embodiment will be described.

[0029] In the present embodiment, as Figures 1 to 4 shown, one end of the lifting mechanism 20 is connected to the chair frame 10 and the other end is connected to the base 30, so as to drive the chair frame 10 to approach or move away from the base 30 to achieve the lifting movement of the chair frame 10. The lifting mechanism 20 can be a telescopic motor, a telescopic cylinder, a motor screw, etc., as long as it can achieve telescopic movement in the vertical direction.

[0030] In the present embodiment, as Figures 1 to 4 shown, the chair frame 10 includes a backrest frame 11, a seat cushion frame 12, and a leg support 13. The backrest frame 11 is used to support the patient's back, the seat cushion frame 12 is used to support the patient's buttocks, and the leg support 13 is used to support the patient's legs. The backrest frame 11 and the leg support 13 are disposed at both ends of the seat cushion frame 12 opposite to each other and are both rotatably connected to the seat cushion frame 12. Thus, by adjusting the angle between the backrest frame 11 and the seat cushion frame 12 and / or adjusting the angle between the leg support 13 and the seat cushion frame 12, the posture of the patient on the chair frame 10 is adjusted. For example, the chair frame 10 is adjusted from Figure 1 or Figure 3 shown in the folded state to Figure 2 or Figure 4The unfolded state shown is for the convenience of medical staff's treatment operations and also meets the comfort requirements of patients. It should be noted that the angle between the backrest frame 11 and the seat cushion frame 12 and / or the angle between the leg support 13 and the seat cushion frame 12 can be adjusted by a driving mechanism such as a push rod.

[0031] In this embodiment, as Figures 5 to 12 shown, the base 30 includes a support assembly 31, a rotation assembly 32, and a locking assembly 33; among them, the support assembly 31 includes a first support member 311 and a second support member 312. Both the first support member 311 and the second support member 312 are formed into plate-like structures. The first support member 311 can be formed into a plate-like structure with a polygonal, circular, or elliptical shape, etc. A through hole 3111 is provided on the first support member 311. The through hole 3111 is preferably a through hole structure provided at the center position of the first support member 311; alternatively, the through hole 3111 can also be a groove structure formed at the top of the first support member 311. The second support member 312 is formed into an annular structure and is disposed above the first support member 311. The inner circumferential wall of the second support member 312 protrudes from the hole wall of the through hole 3111, that is, the projection of the second support member 312 on the first support member 311 falls within the area surrounded by the through hole 3111; preferably, the axis of the annular second support member 312 is coaxially arranged with the through hole 3111.

[0032] As Figure 7 、 Figure 10 and Figure 11 shown, the rotation assembly 32 includes a first rotating member 321 and a second rotating member 322 clamped on both sides in the thickness direction of the second support member 312. The first rotating member 321 and the second rotating member 322 are formed into plate-like structures. The first rotating member 321 is installed in the through hole 3111, and the second rotating member 322 is formed into an annular plate-like structure. The first rotating member 321 and the second rotating member 322 are fixedly connected, so that the first rotating member 321 and the second rotating member 322 can rotate synchronously relative to the support assembly 31. The other end of the lifting mechanism 20 away from the chair frame 10 is installed on the first rotating member 321. In this way, during the relative rotation of the rotation assembly 32 and the support assembly 31, the lifting mechanism 20 and the chair frame 10 are driven to rotate horizontally synchronously.

[0033] A rotating member 323 is provided between the second rotating member 322 and the second support member 312, so as to ensure smooth and stable rotation of the rotation assembly 32. The rotating member 323 can be embedded in the groove on the side of the second rotating member 322 facing the second support member 312 and / or embedded in the groove on the side of the second support member 312 facing the second rotating member 322. The rotating member 323 can be a roller, a ball, or a bearing and other components, as long as it can improve the rotational smoothness between the rotation assembly 32 and the support assembly 31.

[0034] In this embodiment, by rotating the rotating assembly 32 relative to the supporting assembly 31, the horizontal movement of the chair frame 10 is realized. In this way, medical staff can rotate the chair frame 10 to a position convenient for their operation, improving the comfort of medical staff during the treatment process. Due to the clamping structure in which the second support member 312 clamps between the first rotating member 321 and the second rotating member 322, the cooperation gap between the supporting assembly 31 and the rotating assembly 32 is small. Therefore, the shaking amplitude finally transmitted to the chair frame 10 is also very small, thus ensuring the smoothness during the horizontal rotation of the seat.

[0035] Preferably, as Figures 5 to 7 、 Figure 10 and Figure 11 shown, the first rotating member 321 and the second rotating member 322 can be fixedly connected via the connecting assembly 70. The connecting assembly 70 includes a sleeve and bolts or screws. The sleeve is arranged between the first rotating member 321 and the second rotating member 322. In this way, the gap between the first rotating member 321 and the second rotating member 322 in the vertical direction is fixed as the axial height of the sleeve. The screw or bolt sequentially passes through the first rotating member 321, the sleeve and the second rotating member 322 to fix the rotating assembly 32. Preferably, a plurality of connecting assemblies 70 are arranged at intervals around the circumferences of the first rotating member 321 and / or the second rotating member 322.

[0036] In this embodiment, as Figures 5 to 7 、 Figures 10 to 12 shown, the locking assembly 33 includes a fixing member 331, a driving member 332 and a locking member 333. The fixing member 331 is installed on the second rotating member 322, thus realizing the fixation of the locking assembly 33. A fixing hole for the driving member 332 to pass through is formed in the fixing member 331, so that the driving member 332 is rotatably connected to the fixing member 331. The driving member 332 and the locking member 333 form a screw pair. The screw pair is a transmission pair based on a spiral line, which can convert rotational motion into linear motion, so as to drive the locking member 333 to slide in a direction approaching or departing from the fixing member 331 during the rotation of the driving member 332 relative to the fixing member 331.

[0037] Specifically, as Figure 12As shown, a first clamping portion 3331 that abuts against the fixing member 331 and a second clamping portion 3332 that abuts against the second support member 312 are formed on the locking member 333. The first clamping portion 3331 and the second clamping portion 3332 are arranged one above the other on the side of the locking member 333 facing the fixing member 331, and the first clamping portion 3331 and the second clamping portion 3332 are arranged at an angle, such that they enclose a flared structure, that is, the distance between the first clamping portion 3331 and the second clamping portion 3332 in the vertical direction on the side close to the fixing member 331 is greater than the distance in the vertical direction on the side away from the fixing member 331. Thus, by rotating the driving member 332, the locking member 333 slides in a direction close to or away from the fixing member 331, so as to increase or decrease the pressing force exerted by the locking member 333 on the second rotating member 322 and the second support member 312, such that the second rotating member 322 and the second support member 312 approach each other in the vertical direction, increasing the pressing force on the rotating member 323, thereby realizing rotational limiting. Thus, after the chair frame 10 rotates to the desired angle, the locking assembly 33 can be used to prevent the relative rotation of the rotating assembly 32 and the support assembly 31, realizing reliable fixation of the chair frame 10 and meeting the treatment requirements. When the pressing force decreases, the second rotating member 322 and the second support member 312 move away from each other in the vertical direction to restore the rotation of the rotating assembly 32 relative to the support assembly 31.

[0038] Preferably, in this embodiment, as Figures 5 to 7 、 Figures 10 to 12 shown, the driving member 332 is formed as a rod-shaped structure, such as a cylindrical rod-shaped structure. One end of the driving member 332 in the length direction is formed as a driving end 3321 with a plate-shaped structure. The driving end 3321 can be formed as a foot pedal structure, facilitating a person to step on the driving end 3321 to realize rotational driving of the driving member 332. The locking member 333 is arranged at the other end of the driving member 332 in the length direction and on the side of the fixing member 331 facing away from the driving end 3321.

[0039] As Figure 12 shown, an inclined first abutting portion 3311 is formed at the top of the fixing member 331, such that the height dimension of the side of the fixing member 331 facing the locking member 333 is smaller than the height dimension of the side of the fixing member 331 facing the driving end 3321. The first clamping portion 3331 fits with the first abutting portion 3311. An inclined second abutting portion 3120 is formed at the bottom of the second support member 312. The second abutting portion 3120 is arranged at an angle with the first abutting portion 3311. The second clamping portion 3332 fits with the second abutting portion 3120. Thus, the locking member 333 forms a cooperation between inclined surfaces with the fixing member 331 and the second support member 312, improving the locking effect.

[0040] Furthermore, in this embodiment, as Figure 6 、 Figure 11 andFigure 12 As shown, the locking component 33 further includes an adjusting member 40. The adjusting member 40 is formed as a cylindrical structure sleeved on the driving member 332. The fixing member 331 is arranged on the outer wall of the adjusting member 40, so that the adjusting member 40 can adjust the relative position between the driving member 332 and the fixing member 331, thereby adjusting the magnitude of the extrusion force exerted by the locking member 333 on the fixing member 331 and the second support member 312. In this way, when the extrusion force of the locking member 333 on the fixing member 331 and the second support member 312 is insufficient, the fixing member 331 can be driven by the adjusting member 40 to move towards the direction close to the locking member 333, so that the locking member 333 is in a state of slightly pressing the second support member 312 in the initial state before locking.

[0041] Specifically, a limiting convex portion 3322 protruding outward is formed on the side wall of the driving member 332 to limit the displacement of the adjusting member 40 in the axial direction of the driving member 332. The limiting convex portion 3322 is arranged on the side of the adjusting member 40 away from the locking member 333. The limiting convex portion 3322 can be formed as a convex block structure extending radially outward along the outer wall of the driving member 332 or a ring structure. The adjusting member 40 includes a sleeve portion 41 and a rotating portion 42 which are rotatably connected.

[0042] In the first optional implementation manner, the sleeve portion 41 is formed as a flange sleeve with a flange provided at one end in the axial direction. The flange abuts against the limiting convex portion 3322. The rotating portion 42 is formed as a nut threadedly connected to the sleeve portion 41. The fixing member 331 is installed on the sleeve portion 41. One end of the rotating portion 42 in the axial direction can abut against the surface of the fixing member 331 facing the driving end 3321. By rotating the rotating portion 42, the position of the fixing member 331 on the sleeve portion 41 can be adjusted, so as to adjust the distance between the fixing member 331 and the locking member 333 in the length direction of the driving member 332, thereby realizing the extrusion force exerted by the locking member 333 on the fixing member 331 and the second support member 312 when sliding.

[0043] In the second optional implementation manner, the sleeve portion 41 is formed as a cylindrical structure, and its outer wall is provided with threads. The rotating portion 42 is threadedly connected to the sleeve portion 41, so that the sleeve portion 41 and the rotating portion 42 are integrally formed as the above-mentioned flange sleeve. The only difference from the first optional implementation manner is that the flange in the first optional implementation manner is set as an adjustable structure threadedly connected to the cylindrical structure (i.e., the rotating portion 42 in the second optional implementation manner). One end of the rotating portion 42 in the axial direction can abut against the surface of the fixing member 331 facing the driving end 3321. By rotating the rotating portion 42, the position of the fixing member 331 on the sleeve portion 41 can be adjusted, so as to adjust the distance between the fixing member 331 and the locking member 333 in the length direction of the driving member 332, thereby realizing the extrusion force exerted by the locking member 333 on the fixing member 331 and the second support member 312 when sliding.

[0044] In addition, in this embodiment, as Figures 6 to 8 and Figure 10 shown, the dental chair base 30 further includes an anti-shake mechanism 50 to further prevent the chair frame 10 from rotating and shaking. Specifically, the anti-shake mechanism 50 includes a clamping assembly 51 located above the second rotating member 322. Preferably, the clamping assembly 51 is close to or slightly presses against the upper part of the second rotating member 322. A connecting portion 510 protruding from the outer side wall of the second rotating member 322 is provided on the clamping assembly 51; the connecting sleeve 52 is formed as a cylindrical structure clamped between the connecting portion 510 and the second support member 312 and is arranged on the outer side of the second rotating member 322; the fastener 53 is a screw or a bolt. The fastener 53 sequentially passes through the connecting hole 310 on the connecting portion 510, the connecting sleeve 52 and the second support member 312, so as to mount the clamping assembly 51 on the second support member 312. Specifically, the clamping assembly 51, the connecting sleeve 52 and the fastener 53 are all mounted on the second support member 312. The clamping assembly 51 and the second support member 312 can clamp the second rotating member 322. When the chair frame 10 shakes, it will be transmitted to the first rotating member 321 through the lifting mechanism 20. At this time, the rotating assembly 32 as a whole is likely to rotate relative to the support assembly 31. However, since the clamping assembly 51 is fixedly connected to the support assembly 31, and the clamping assembly 51 and the second support member 312 clamp and limit the second rotating member 322, a double clamping effect is formed as a whole.

[0045] Specifically, the first clamping comes from the clamping action of the clamping assembly 51 on the second rotating member 322 formed by connecting the connecting sleeve 52 and the fastener 53 to the second support member 312; the second clamping comes from the clamping of the first rotating member 321 and the second rotating member 322 on the second support member 312. Therefore, finally, it is ensured that the relative shaking amplitude between the support assembly 31 and the clamping assembly 51 is smaller, and the shaking amplitude transmitted to the chair frame 10 is smaller.

[0046] Preferably, when the chair frame 10 is unloaded (i.e., when there is no one), the distance in the vertical direction between the lower surface of the clamping assembly 51 (i.e., the lower surface of the adjustment block 512 described below) and the upper surface of the second rotating member 322 does not exceed 2 mm, and they can even be in contact with each other to ensure the anti-rotation effect.

[0047] Furthermore, in this embodiment, as Figure 10As shown, the clamping assembly 51 includes a fixed seat 511, an adjustment block 512, and a screwing member 513. The fixed seat 511 is formed as a block structure and is disposed above the second rotating member 322. A connecting portion 510 is formed on the side wall of the fixed seat 511, such that the fastener 53 fixedly connects the fixed seat 511, the connecting sleeve 52, and the second support member 312. The adjustment block 512 is formed as a block structure and is disposed on the side of the fixed seat 511 facing the second rotating member 322. A groove is provided at the bottom of the fixed seat 511, and the adjustment block 512 is disposed in the groove and at least a part of the adjustment block 512 can protrude from the groove so as to protrude from the lower surface of the fixed seat 511. The screwing member 513 is connected to the fixed seat 511. The screwing member 513 can be a set screw structure threadedly connected to the fixed seat 511. One end of the screwing member 513 passing through the fixed seat 511 abuts against the adjustment block 512. Thus, by adjusting the relative position of the screwing member 513 and the fixed seat 511, the height of the adjustment block 512 protruding from the fixed seat 511 is adjusted, thereby adjusting the distance between the adjustment block 512 and the second rotating member 322.

[0048] Preferably, the material of the adjustment block 512 is POM (polyoxymethylene), so that it has high strength and low friction coefficient to reduce the rotational resistance to the second rotating member 322.

[0049] Furthermore, in this embodiment, as Figures 6 to 9 shown, a receiving groove 3122 is formed on the side of the second support member 312 facing the first support member 311. The receiving groove 3122 is disposed on the side of the connecting hole 310 away from the clamping assembly 51 and communicates with the connecting hole 310, that is, the connecting hole 310 extends from the bottom of the receiving groove 3122 towards the direction close to the clamping assembly 51. A protruding limiting portion is formed on the circumferential side wall of the fastener 53. The main body of the fastener 53 can be formed as a bolt with a threaded circumferential side wall. The limiting portion can be a nut structure on the bolt. The limiting portion is disposed in the receiving groove 3122 and abuts against the bottom of the receiving groove 3122 to achieve axial limitation of the fastener 53.

[0050] Specifically, as Figures 6 to 9 shown, the connecting hole 310 for the fastener 53 to pass through on the second support member 312 is formed as a strip-shaped hole, specifically an arc-shaped strip-shaped hole, such that the fastener 53 can slide along the extending track of the strip-shaped hole. The wall thickness of one end of the connecting hole 310 in its length direction is H1 to form a thin wall side 31211, and the wall thickness of the other end of the connecting hole 310 in its length direction is H2, H2 > H1, to form a thick wall side 31212, such that the wall thicknesses at both ends of the connecting hole 310 in its length direction are different.

[0051] More specifically, in the depth direction of the connecting hole 310, the bottom of the thick wall side 31212 protrudes from the bottom of the thin wall side 31211. When the fastener 53 moves from the thin wall side 31211 to the thick wall side 31212, the limiting part as described above will move downward, thereby driving the clamping assembly 51 to move in the direction close to the second support member 312, so as to reduce the distance between the clamping assembly 51 and the second rotating member 322. Preferably, the top of the thick wall side 31212 is flush with the top of the thin wall side 31211.

[0052] Preferably, H2 - H1 ≤ 2 mm, and the transition from the thin wall side 31211 to the thick wall side 31212 is a gentle slope transition.

[0053] In this embodiment, as Figures 6 to 9 shown, a limiting protrusion 3221 protruding towards the anti - sway mechanism 50 is formed on the second rotating member 322. The limiting protrusion 3221 can be arranged on the circumferential side wall of the second rotating member 322. When the second rotating member 322 drives the limiting protrusion 3221 to rotate and abut against the connecting sleeve 52, under the action of an external force, the limiting protrusion 3221 can push the connecting sleeve 52 and the fastener 53 together to move from the thin wall side 31211 to the thick wall side 31212, so that the fastener 53 drives the clamping assembly 51 to move in the direction close to the second support member 312, so as to reduce the distance between the clamping assembly 51 and the second rotating member 322, making the clamping assembly 51 move downward close to the second rotating member 322, reducing the gap between the second rotating member 322 and the clamping assembly 51, and thus further reducing the sway amplitude of the second rotating member 322. Therefore, the sway amplitude fed back to the chair frame 10 as a whole will be smaller.

[0054] In this embodiment, as Figures 5 to 8 shown, the dental chair base further includes a reset mechanism 60. The reset mechanism 60 is installed in the installation groove 3222 opened on the second rotating member 322. The installation groove 3222 is opened on the side wall of the top of the second rotating member 322, so that the installation groove 3222 penetrates through the outer edge side wall of the second rotating member 322, and the reset mechanism 60 arranged in the installation groove 3222 does not protrude from the upper surface of the second rotating member 322. Specifically, the reset mechanism 60 includes a reset block and an elastic member installed below the reset block. The elastic member is a torsion spring. When the reset mechanism 60 is not subject to an external force, at least part of the reset block extends out of the installation groove 3222 and protrudes from the side wall of the second rotating member 322.

[0055] Optionally, as Figure 8As shown, one end of the reset block away from its rotation axis is formed as a protruding portion 61, and the side wall of the reset block connected to the protruding portion 61 is formed as an inclined portion 62. When the reset mechanism 60 is not subject to external force, a part of the inclined portion 62 can extend out of the installation groove 3222. The inclined portion 62 is a bevel structure. The protruding portion 61 can be formed as an arc surface protruding away from the rotation axis of the reset block or a bevel structure. When the protruding portion 61 is a bevel structure, the inclination angle of the inclined portion 62 is gentler than the inclination angle of the protruding portion 61.

[0056] The second rotating member 322 can rotate in a first rotation direction or a second rotation direction. The first rotation direction and the second rotation direction are opposite. The first rotation direction is Figure 8 the counterclockwise direction from a perspective, and the second rotation direction is Figure 8 the clockwise direction from a perspective.

[0057] In this embodiment, rotating the second rotating member 322 in the first rotation direction causes the connecting sleeve 52 to move from the thin-wall side 31211 to the thick-wall side 31212. The fastener 53 drives the clamping assembly 51 to move towards the direction close to the second support member 312 to reduce the distance between the clamping assembly 51 and the second rotating member 322. It should be noted that due to the setting of the inclined portion 62, during the rotation of the second rotating member 322 in the first rotation direction, when the reset block and the connecting sleeve 52 are staggered, the elastic member will twist to drive the reset block to move towards the direction of extending into the installation groove 3222 to avoid the connecting sleeve 52, so that the reset block will not push the connecting sleeve 52 to the thick-wall side 31212 but will push it to the thick-wall side 31212 only when the limit protrusion 3221 contacts the connecting sleeve 52.

[0058] Further, rotating the second rotating member 322 in the second rotation direction can drive the reset block to push the connecting sleeve 52 away from the thick-wall side 31212 (specifically, the protruding portion 61 contacts the connecting sleeve 52 and pushes the connecting sleeve 52 away from the thick-wall side 31212 during the rotation of the second rotating member 322). After the connecting sleeve 52 is pushed to the thin-wall side 31211, the connecting sleeve 52 remains in contact with the thin-wall side 31211 and the connecting sleeve 52 cannot move. Blocked by the thin-wall side 31211, the elastic member generates torsional deformation and drives the reset block to rotate towards the direction of extending into the installation groove 3222. When the second rotating member 322 continues to rotate in the second rotation direction and the reset block is no longer blocked, that is, until the reset block is separated from the connecting sleeve 52, the elastic member deforms and recovers to realize the reset of the reset block; thus, it will not affect the subsequent rotation of the second rotating member 322 in the first rotation direction.

[0059] In a preferred embodiment, as Figure 5As shown, there are two sets of anti-sway mechanisms 50, and the two sets of anti-sway mechanisms 50 are arranged opposite to each other along the rotation axis of the rotation assembly 32; in this embodiment, the length direction of the chair frame 10 is the first direction X, and the width direction of the chair frame 10 is the second direction Y. The first direction X is perpendicular to the second direction Y. When the chair frame 10 rotates to the maximum angular position (i.e., the common chair position during treatment. Due to the installation direction of other instruments of the dental chair, it is determined that the chair frame 10 needs to be fixed when rotating to the common chair position to ensure the anti-sway effect), that is Figure 1 and Figure 2 as shown in the position, the anti-sway mechanism 50 is arranged within the included angle formed by the first direction X and the second direction Y. The included angle between the line connecting the middle of the anti-sway mechanism 50 and the rotation axis of the rotation assembly 32 and the first direction X is β, and 20° ≤ β ≤ 60°. In this way, a reliable anti-sway effect is achieved.

[0060] In a preferred embodiment, β = 45°. At this time, whether the chair frame 10 sways in the length direction or the width direction, the best anti-sway effect can be achieved. The reason is as shown in Figure 5 When the chair frame 10 sways in the length direction, it approximately rotates around the second direction Y at this time. Since β = 45°, the force arm of the anti-sway mechanism 50 in the second direction Y is relatively long. At this time, the force arm is approximately L = Rsin45°, where R is the straight-line distance from the axis of the rotation assembly 32 to the anti-sway mechanism 50. In another case, when the chair frame 10 sways in the width direction, it approximately rotates around the first direction X at this time. At this time, the force arm of the anti-sway mechanism 50 is approximately L = Rcos45°.

[0061] It should be noted that in actual use, swaying is a dynamic process. Therefore, it is necessary to ensure that the swaying amplitude in the length direction is small and the swaying amplitude in the width direction is small. Therefore, when β = 45°, the swaying amplitude in multiple directions can be effectively reduced. The dental chair base according to the present invention; the base includes a support assembly and a rotation assembly; the support assembly includes a first support member and a second support member. A through hole is formed in the first support member. The second support member is formed as an annular structure and is disposed above the first support member. The inner circumferential wall of the second support member protrudes from the hole wall of the through hole. The rotation assembly includes a first rotating member and a second rotating member clamped on both sides in the thickness direction of the second support member. The first rotating member and the second rotating member are fixedly connected. The first rotating member is installed in the through hole. The lifting mechanism is installed on the first rotating member. A rotating member is disposed between the second rotating member and the second support member. In this way, by rotating the rotation assembly relative to the support assembly, the horizontal movement of the chair frame is realized. In this way, medical staff can rotate the chair frame to a position convenient for their operation, improving the comfort of medical staff during the treatment process; the second support member is clamped between the first rotating member and the second rotating member, so that the fitting clearance between the support assembly and the rotation assembly is small. Therefore, the shaking amplitude generated when finally transmitted to the chair frame is also very small, thus ensuring the stability during the horizontal rotation of the seat. The locking assembly includes a fixing member, a driving member and a locking member. The fixing member is installed on the second rotating member. The driving member is rotatably connected to the fixing member. The driving member is threadedly connected to the locking member. The locking member is formed with a first clamping portion abutting against the fixing member and a second clamping portion abutting against the second support member. The first clamping portion and the second clamping portion are arranged at an angle. Rotating the driving member causes the locking member to slide in a direction close to or away from the fixing member, so as to increase or decrease the extrusion force applied to the second rotating member and the second support member, so that the second rotating member and the second support member achieve rotational limit when approaching each other. In this way, after the chair frame is rotated to the required angle, the relative rotation between the rotation assembly and the support assembly can be blocked by using the locking assembly, realizing the reliable fixation of the chair frame and meeting the treatment requirements.

[0062] A dental chair provided according to the present invention includes the above-mentioned dental chair base, and thus has all the beneficial effects of the dental chair base, which will not be repeated here.

[0063] Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, used to illustrate the technical solutions of the present application, rather than limiting them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed in the present application can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A dental chair base, characterized in that, The dental chair base includes: A lifting mechanism; A base, including a support assembly and a rotating assembly; The support assembly includes a first support member and a second support member. A through hole is formed in the first support member. The second support member is formed as an annular structure and is disposed above the first support member. The inner circumferential wall of the second support member protrudes from the hole wall of the through hole; The rotating assembly includes a first rotating member and a second rotating member clamped on both sides in the thickness direction of the second support member. The first rotating member and the second rotating member are fixedly connected. The first rotating member is installed in the through hole. The lifting mechanism is installed on the first rotating member. A rotating member is disposed between the second rotating member and the second support member.

2. The dental chair base according to claim 1, wherein The base further includes a locking assembly, and the locking assembly includes: A fixing member installed on the second rotating member; A driving member rotatably connected to the fixing member; A locking member forming a screw pair with the driving member; a first clamping portion abutting against the fixing member and a second clamping portion abutting against the second support member are formed on the locking member. The first clamping portion and the second clamping portion are arranged at an angle. Rotating the driving member causes the locking member to slide in a direction close to or away from the fixing member, so as to increase or decrease the squeezing force applied to the second rotating member and the second support member, and enables the second rotating member and the second support member to achieve rotational limit when approaching each other.

3. The dental chair base according to claim 2, characterized in that, The locking assembly further includes: An adjusting member formed as a cylindrical structure sleeved on the driving member. The fixing member is disposed on the outer wall of the adjusting member. The adjusting member can adjust the relative position between the driving member and the fixing member, thereby adjusting the squeezing force applied by the locking member to the fixing member and the second support member.

4. The dental chair base according to claim 1, wherein, The dental chair base further includes an anti-vibration mechanism, and the anti-vibration mechanism includes: A clamping assembly located above the second rotating member. A connecting portion protruding from the second rotating member is provided on the clamping assembly; A connecting sleeve clamped between the connecting portion and the second support member; A fastening member sequentially passes through the connecting portion, the connecting sleeve, and the connecting hole on the second support member, thereby installing the clamping assembly on the second support member.

5. The dental chair base according to claim 4, characterized in that, The clamping assembly includes: A fixing seat disposed above the second rotating member. The connecting portion is disposed on the fixing seat; An adjusting block disposed on one side of the fixing seat facing the second rotating member; A screwing member connected to the fixing seat, and one end of the screwing member passing through the fixing seat abuts against the adjusting block.

6. The dental chair base according to claim 4, characterized in that, The connecting hole on the second support member is formed as a strip-shaped hole. The fastening member can slide along the extending trajectory of the strip-shaped hole; the thickness of the hole wall at one end in the length direction of the connecting hole is H1 to form a thin-wall side; the thickness of the hole wall at the other end in the length direction of the connecting hole is H2, and H2 > H1, to form a thick-wall side. In the depth direction of the connecting hole, the bottom of the thick-wall side protrudes from the bottom of the thin-wall side.

7. The dental chair base according to claim 6, wherein A limiting protrusion protruding toward the anti-vibration mechanism is formed on the second rotating member. When the second rotating member drives the limiting protrusion to rotate until it abuts against the connecting sleeve, the limiting protrusion can push the connecting sleeve to move from the thin-wall side to the thick-wall side, so that the fastener drives the clamping assembly to move toward the second support member, thereby reducing the distance between the clamping assembly and the second rotating member.

8. The dental chair base according to claim 6, wherein The dental chair base further includes: a reset mechanism installed in the installation groove formed on the second rotating member. The reset mechanism includes a reset stopper and an elastic member installed below the reset stopper. When the reset mechanism is not subject to external force, at least part of the reset stopper extends out of the installation groove and protrudes from the side wall of the second rotating member; Rotate the second rotating member in the first rotation direction so that the connecting sleeve moves from the thin-wall side to the thick-wall side, and the fastener drives the clamping assembly to move toward the second support member to reduce the distance between the clamping assembly and the second rotating member; Rotate the second rotating member in the second rotation direction, which can drive the reset stopper to push the connecting sleeve away from the thick-wall side. When the connecting sleeve is pushed to move to the thin-wall side, the elastic member is torsionally deformed by the blockage of the thin-wall side and drives the reset stopper to rotate toward the direction of extending into the installation groove. When the second rotation direction is continued to rotate until the reset stopper is no longer blocked, the elastic member deforms and recovers to achieve the reset of the reset stopper; the first rotation direction and the second rotation direction are opposite.

9. The dental chair base according to claim 4, characterized in that, The lifting mechanism is used to drive the chair frame to move up and down. There are two sets of anti-vibration mechanisms, and the two sets of anti-vibration mechanisms are arranged opposite to each other along the rotation axis of the rotating component; the length direction of the chair frame is the first direction, the width direction of the chair frame is the second direction, the first direction is perpendicular to the second direction, the anti-vibration mechanism is arranged within the angle formed by the first direction and the second direction, and the angle between the connection line of the anti-vibration mechanism and the rotation axis of the rotating component and the first direction is β, 20°≤β≤60°.

10. A dental chair, characterized in that, Including the dental chair base according to any one of claims 1 to 9.

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