Dental chair base and dental chair

Abstract

The present invention relates to the field of medical device technology, and in particular to a dental chair base and a dental chair, the dental chair base comprising: the base comprising a support assembly and a rotating assembly; the support assembly comprising a first support member and a second support member, the first support member being provided with a through hole, the second support member being formed into an annular structure and being arranged above the first support member, and the inner ring wall of the second support member being arranged to protrude from the hole wall of the through hole; the rotating assembly comprising a first rotating member and a second rotating member being clamped on both sides of the second support member in a thickness direction, the first rotating member and the second rotating member being fixedly connected, the first rotating member being installed in the through hole, the lifting mechanism being installed on the first rotating member, and a rotating member being arranged between the second rotating member and the second support, so that the fitting clearance between the support assembly and the rotating assembly is small, so that the shaking amplitude generated when it is finally transmitted to the chair frame is also very small, thereby ensuring the stability of the chair seat during horizontal rotation.

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 provided 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 application 202411150995.X, in which the mounting seat is fixed, resulting in the dental chair being unable to rotate horizontally, thereby increasing the difficulty of operation for medical staff during treatment, and easily making medical staff 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, such as a locking motor, are required to achieve locking. This results in a complex base structure, high cost, and inconvenient maintenance. Summary of the Invention

[0003] In view of this, the purpose of this 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:

[0005] Lifting mechanism;

[0006] A base, comprising a supporting assembly and a rotating assembly;

[0007] The support assembly includes a first support member and a second support member, wherein 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 ring wall of the second support member protrudes from the hole wall of the through hole;

[0008] 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 provided between the second rotating member and the second supporting member.

[0009] Preferably, the base further comprises a locking assembly, the locking assembly comprising:

[0010] a fixed member, mounted on the second rotating member;

[0011] a driving member, rotatably connected to the fixing member;

[0012] The locking member forms a spiral pair with the driving member; the locking member is formed with a first clamping portion abutting against the fixed member and a second clamping portion abutting against the second supporting member, the first clamping portion and the second clamping portion are arranged at an angle, and the driving member is rotated to make the locking member slide in a direction approaching or away from the fixed member to increase or decrease the extrusion force applied to the second rotating member and the second supporting member, so that the second rotating member and the second supporting member are rotationally limited when they approach each other.

[0013] Preferably, the locking assembly further comprises:

[0014] The adjusting member is formed as a cylindrical structure sleeved on the driving member, and the fixing member is arranged on the outer wall of the adjusting member. The adjusting member can adjust the relative position of the driving member and the fixing member, thereby adjusting the extrusion force applied by the locking member to the fixing member and the second support member.

[0015] Preferably, the dental chair base further includes an anti-sway mechanism, and the anti-sway mechanism includes:

[0016] a clamping assembly located above the second rotating member, the clamping assembly being provided with a connecting portion protruding from the second rotating member;

[0017] a connecting sleeve, sandwiched between the connecting portion and the second supporting member;

[0018] A fastener passes through the connecting portion, the connecting sleeve and the connecting hole on the second supporting member in sequence, thereby installing the clamping assembly on the second supporting member.

[0019] Preferably, the clamping assembly comprises:

[0020] A fixing seat is provided above the second rotating member, and the connecting portion is provided on the fixing seat;

[0021] an adjusting block, disposed on a side of the fixing seat facing the second rotating member;

[0022] The screwing piece is connected to the fixing seat, and one end of the screwing piece passes through the fixing seat and abuts against the adjusting block.

[0023] Preferably, the connecting hole on the second support member is formed as a strip hole, and the fastener can slide along the extension track of the strip hole; the hole wall thickness of the connecting hole at one end in its length direction is H1 to form a thin-walled side; the hole wall thickness of the connecting hole at the other end in its length direction is H2, H2>H1, to form a thick-walled side, and in the depth direction of the connecting hole, the bottom of the thick-walled side protrudes from the bottom of the thin-walled side.

[0024] Preferably, a limiting protrusion protruding toward the anti-sway 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 from the thin-walled side to the thick-walled side, so that the fastener drives the clamping assembly to move toward the direction close to the second support member to reduce the distance between the clamping assembly and the second rotating member.

[0025] Preferably, the dental chair base further comprises:

[0026] a reset mechanism mounted in a mounting groove formed in the second rotating member, the reset mechanism comprising a reset block and an elastic member mounted below the reset block, wherein when the reset mechanism is not subjected to an external force, at least a portion of the reset block extends out of the mounting groove and protrudes from a side wall of the second rotating member;

[0027] Rotating the second rotating member along the first rotation direction causes the connecting sleeve to move from the thin-walled side to the thick-walled side, and the fastener drives the clamping assembly to move in a direction close to the second support member to reduce the distance between the clamping assembly and the second rotating member; rotating the second rotating member along the second rotation direction can drive the reset block to push the connecting sleeve away from the thick-walled side. After pushing the connecting sleeve to move to the thin-walled side, the elastic member is blocked by the thin-walled side, causing torsional deformation and driving the reset block to rotate in a direction extending into the mounting groove. When the reset block is continued to rotate along the second rotation direction so that the reset block is no longer blocked, the elastic member is deformed and the reset block is reset; the first rotation direction and the second rotation direction are opposite.

[0028] Preferably, the lifting mechanism is used to drive the lifting movement of the chair frame, and two groups of anti-sway mechanisms are provided, and the two groups of anti-sway 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, and the width direction of the chair frame is the second direction, the first direction is perpendicular to the second direction, and the anti-sway mechanism is arranged within the angle formed by the first direction and the second direction, and the angle between the line connecting the anti-sway mechanism and the rotation axis of the rotating component and the first direction is β, 20°≤β≤60°.

[0029] A second aspect of the present invention provides a dental chair, comprising the dental chair base described in any one of the above technical solutions.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The dental chair base of the present invention includes a support assembly and a rotating assembly; the support assembly includes 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 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 support 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 provided between the second rotating member and the second support member, so that the horizontal movement of the chair frame is achieved by rotating the rotating assembly relative to the support assembly, so that medical staff can rotate the chair frame to a position convenient for their operation, thereby improving the comfort of medical staff during treatment; the second support member is clamped between the first rotating member and the second rotating member, so that the matching gap between the support assembly and the rotating assembly is small, so the shaking amplitude generated when it is finally transmitted to the chair frame is also very small, thereby ensuring the stability of the chair seat during horizontal rotation.

[0032] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of the structure of the dental chair base provided by an embodiment of the present invention when the maximum rotation angle is fixed;

[0035] Figure 2 A schematic diagram of the structure of the dental chair frame in the unfolded state when the dental chair base is fixed at the maximum rotation angle provided by an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the structure of the dental chair base during rotation provided by an embodiment of the present invention;

[0037] Figure 4A schematic diagram of the structure of a dental chair base provided by an embodiment of the present invention, with the chair frame in an unfolded state during rotation;

[0038] Figure 5 for Figure 1 Structural diagram of the base in the state;

[0039] Figure 6 A schematic diagram of the structural decomposition of the base of a dental chair provided in an embodiment of the present invention;

[0040] Figure 7 A cross-sectional view of a rocking prevention mechanism in a dental chair base provided in an embodiment of the present invention;

[0041] Figure 8 for Figure 7 A schematic diagram of the structure enlarged in the middle;

[0042] Figure 9 An axial cross-sectional view of a connecting hole in a dental chair base provided by an embodiment of the present invention;

[0043] Figure 10 A cross-sectional view of two anti-sway mechanisms in a dental chair base provided by an embodiment of the present invention;

[0044] Figure 11 A cross-sectional view of a locking assembly in a dental chair base provided by an embodiment of the present invention;

[0045] Figure 12 for Figure 11 Schematic diagram of the structure enlarged at point B.

[0046] Icons: 10-chair frame; 11-backrest frame; 12-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 abutment portion; 310-connecting hole; 31211-thin-wall side; 31212-thick-wall side; 3122-accommodating 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-fixed Part; 3311-first abutment portion; 332-driving member; 3321-driving end; 3322-limiting protrusion; 333-locking member; 3331-first clamping portion; 3332-second clamping portion; 40-adjusting member; 41-sleeve portion; 42-rotating portion; 50-anti-sway mechanism; 51-clamping assembly; 510-connecting portion; 511-fixed seat; 512-adjusting block; 513-screwing member; 52-connecting sleeve; 53-fastener; 60-resetting mechanism; 61-protrusion; 62-inclined portion; 70-connecting assembly; X-first direction; Y-second direction. DETAILED DESCRIPTION

[0047] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0048] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0049] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements present between them.

[0050] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0051] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0052] For ease of description, spatially relative terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be located "below" or "lower" relative to the other element. Thus, the term "above" encompasses 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 spatially relative terms used herein will be interpreted accordingly.

[0053] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0054] 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 shapes that occur during manufacturing.

[0055] 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.

[0056] According to a first aspect of the present invention, a dental chair base is provided, which includes a chair frame 10 , a lifting mechanism 20 and a base 30 .

[0057] Hereinafter, the specific structures of the above-mentioned components of the dental chair base according to this embodiment will be described.

[0058] In this embodiment, if Figures 1 to 4 As 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 closer to or farther 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 or a motor screw, etc., as long as it can achieve telescopic movement in the vertical direction.

[0059] In this embodiment, if Figures 1 to 4As 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 arranged at both ends of the seat cushion frame 12 relative to each other and are both rotatably connected to the seat cushion frame 12. In this way, 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 can be adjusted. For example, the chair frame 10 can be adjusted from Figure 1 or Figure 3 The folded state shown is adjusted to Figure 2 or Figure 4 The expanded state shown is convenient for medical personnel to perform treatment and also satisfies the patient's comfort requirements. 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.

[0060] In this embodiment, if Figures 5 to 12 As shown, the base 30 includes a support assembly 31, a rotation assembly 32, and a locking assembly 33. The support assembly 31 includes a first support member 311 and a second support member 312. The first support member 311 and the second support member 312 are both formed into plate-like structures. The first support member 311 can be formed into a plate-like structure in a polygonal, circular, or elliptical shape. The first support member 311 is provided with a through hole 3111. The through hole 3111 is preferably a through hole structure located at the center of the first support member 311. Alternatively, the through hole 3111 can 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 annular wall of the second support member 312 protrudes from the 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 enclosed by the through hole 3111. Preferably, the axis of the annular second support member 312 is coaxial with the through hole 3111.

[0061] like Figure 7 、 Figure 10 and Figure 11As shown, the rotating component 32 includes a first rotating member 321 and a second rotating member 322 clamped on both sides of the second support member 312 in the thickness direction. The first rotating member 321 and the second rotating member 322 are formed into a plate-like structure. 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 component 31. The other end of the lifting mechanism 20 away from the chair frame 10 is installed on the first rotating member 321, so that the lifting mechanism 20 and the chair frame 10 can be driven to rotate horizontally synchronously during the relative rotation process of the rotating component 32 and the support component 31.

[0062] A rotating member 323 is disposed between the second rotating member 322 and the second support member 312 to ensure smooth and stable rotation of the rotating assembly 32. The rotating member 323 can be embedded in a groove on the side of the second rotating member 322 facing the second support member 312 and / or in a groove on the side of the second support member 312 facing the second rotating member 322. The rotating member 323 can be a roller, ball bearing, or bearing, as long as it can enhance the smooth rotation between the rotating assembly 32 and the support assembly 31.

[0063] In this embodiment, the horizontal movement of the chair frame 10 is achieved by rotating the rotating component 32 relative to the supporting component 31, so that medical staff can rotate the chair frame 10 to a position convenient for their operation, thereby improving the comfort of medical staff during treatment; it is precisely because the second support member 312 is clamped between the first rotating member 321 and the second rotating member 322 that the fitting clearance between the supporting component 31 and the rotating component 32 is small, so the shaking amplitude generated when it is finally transmitted to the chair frame 10 is also very small, thereby ensuring the stability of the chair seat during horizontal rotation.

[0064] Preferably, if Figures 5 to 7 、 Figure 10 and Figure 11 As shown, the first rotating member 321 and the second rotating member 322 can be fixedly connected via a connecting assembly 70. The connecting assembly 70 includes a sleeve and a bolt or screw. The sleeve is disposed between the first rotating member 321 and the second rotating member 322, so that the vertical gap between the first rotating member 321 and the second rotating member 322 is fixed to 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 secure the rotating assembly 32. Preferably, a plurality of connecting assemblies 70 are provided, and the plurality of connecting assemblies 70 are circumferentially spaced around the first rotating member 321 and / or the second rotating member 322.

[0065] In this embodiment, if Figures 5 to 7 、 Figures 10 to 12As 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, so that the locking assembly 33 is fixed. A fixing hole for the driving member 332 to pass through is opened on the fixing member 331, so that the driving member 332 is rotatably connected to the fixing member 331, and the driving member 332 and the locking member 333 form a spiral pair. The spiral pair is a transmission pair based on a spiral line, which can convert rotational motion into linear motion so that the locking member 333 can be driven to slide toward or away from the fixing member 331 during the rotation of the driving member 332 relative to the fixing member 331.

[0066] Specifically, if Figure 12 As shown, the locking member 333 is formed with 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. The first clamping portion 3331 and the second clamping portion 3332 are arranged on the side of the locking member 333 facing the fixing member 331 and are arranged one above and one below. The first clamping portion 3331 and the second clamping portion 3332 are arranged at an angle so that the two form a flared structure, that is, the distance between the first clamping portion 3331 and the second clamping portion 3332 in the vertical direction close to the fixing member 331 is greater than the distance in the vertical direction away from the fixing member 331. The distance on the chair frame 10 is thus rotated, causing the locking member 333 to slide in a direction toward or away from the fixing member 331, thereby increasing or decreasing the squeezing force exerted by the locking member 333 on the second rotating member 322 and the second support member 312. This causes the second rotating member 322 and the second support member 312 to move vertically closer to each other, increasing the squeezing force on the rotating member 323, thereby achieving rotational limit. After the chair frame 10 is rotated 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, thereby reliably fixing the chair frame 10 and meeting treatment requirements. When the squeezing force is reduced, the second rotating member 322 and the second support member 312 move vertically away from each other, resuming the rotation of the rotating assembly 32 relative to the support assembly 31.

[0067] Preferably, in this embodiment, Figures 5 to 7 、 Figures 10 to 12 As 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 of a plate-shaped structure. The driving end 3321 can be formed as a pedal structure, which is convenient for people to step on the driving end 3321 to realize the rotational drive 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 is arranged on the side of the fixing member 331 facing away from the driving end 3321.

[0068] like Figure 12As shown, a first abutting portion 3311 is formed at an angle on the top of the fixing member 331, so that the height dimension of the fixing member 331 facing the locking member 333 is smaller than the height dimension of the fixing member 331 facing the driving end 3321, the first clamping portion 3331 is fitted with the first abutting portion 3311, and a second abutting portion 3120 is formed at an angle on the bottom of the second support member 312, the second abutting portion 3120 is set at an angle to the first abutting portion 3311, and the second clamping portion 3332 is fitted with the second abutting portion 3120, so that the locking member 333, the fixing member 331 and the second support member 312 form a coordination between the inclined surfaces, thereby improving the locking effect.

[0069] Furthermore, in this embodiment, Figure 6 、 Figure 11 and Figure 12 As shown, the locking assembly 33 also includes an adjusting member 40, which is formed as a cylindrical structure sleeved on the driving member 332, and 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 of the driving member 332 and the fixing member 331, thereby adjusting the magnitude of the extrusion force applied by the locking member 333 to 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 in a 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.

[0070] Specifically, the sidewall of the driving member 332 is formed with an outwardly protruding limiting protrusion 3322 to limit the axial displacement of the adjusting member 40 relative to the driving member 332. The limiting protrusion 3322 is located on the side of the adjusting member 40 away from the locking member 333. The limiting protrusion 3322 can be formed as a protrusion structure extending radially outward along the outer wall of the driving member 332, or it can be formed as an annular structure. The adjusting member 40 includes a sleeve portion 41 and a rotating portion 42 that are rotatably connected.

[0071] In a first optional embodiment, 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 protrusion 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, and 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. The position of the fixing member 331 on the sleeve portion 41 can be adjusted through the rotating portion 42, thereby adjusting 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 applied by the locking member 333 to the fixing member 331 and the second support member 312 when sliding.

[0072] In the second optional embodiment, the sleeve portion 41 is formed as a cylindrical structure, and the outer wall is provided with a thread, and 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 into a flange sleeve as described above. The only difference from the first optional embodiment is that the flange in the first optional embodiment is provided as an adjustable structure threadedly connected to the cylindrical structure (i.e., the rotating portion 42 in the second optional embodiment), and 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. The position of the fixing member 331 on the sleeve portion 41 can be adjusted through the rotating portion 42, thereby adjusting 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 applied by the locking member 333 to the fixing member 331 and the second support member 312 when sliding.

[0073] In addition, in this embodiment, Figures 6 to 8 and Figure 10 As shown, the dental chair base 30 also includes an anti-sway mechanism 50 to further prevent the chair frame 10 from rotating and shaking. Specifically, the anti-sway mechanism 50 includes a clamping assembly 51 located above the second rotating member 322. Preferably, the clamping assembly 51 is close to or slightly pressed above the second rotating member 322. The clamping assembly 51 is provided with a connecting portion 510 protruding from the outer wall of the second rotating member 322; the connecting sleeve 52 is formed as a cylindrical structure clamped between the connecting portion 510 and the second support member 312 and is provided on the outside of the second rotating member 322; the fastener 53 is a screw or bolt, and the fastener 53 passes through the connecting portion 510, the connecting sleeve 52 and the second support member 312 in sequence. 2, thereby installing 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 installed 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 easy to rotate relative to the support assembly 31, but because the clamping assembly 51 is fixedly connected to the support assembly 31, and the clamping assembly 51 and the second support member 312 clamp the second rotating member 322 to limit the position, so the whole forms a double clamping effect.

[0074] Specifically, the first heavy clamping comes from the clamping component 51 being connected to the second support member 312 via the connecting sleeve 52 and the fastener 53, forming a clamping effect on the second rotating member 322; the second heavy clamping comes from the clamping of the second support member 312 by the first rotating member 321 and the second rotating member 322, so that the relative shaking amplitude of the support component 31 and the clamping component 51 is ultimately ensured to be smaller, so that the shaking amplitude transmitted to the chair frame 10 is smaller.

[0075] Preferably, when the chair frame 10 is unloaded (i.e., when no one is there), the vertical distance 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 may even be in contact with each other to ensure the anti-rotation effect.

[0076] Furthermore, in this embodiment, Figure 10 As shown, the clamping assembly 51 includes a fixing seat 511, an adjusting block 512 and a screwing member 513. The fixing seat 511 is formed into a block structure and is arranged above the second rotating member 322. The connecting portion 510 is formed on the side wall of the fixing seat 511, so that the fastener 53 fixes the fixing seat 511, the connecting sleeve 52 and the second support member 312. The adjusting block 512 is formed into a block structure and is arranged on the side of the fixing seat 511 facing the second rotating member 322. A groove is provided at the bottom of the fixing seat 511, and the adjusting block 512 is provided in the groove. At least part of the adjustment block 512 can extend out of the groove so that it protrudes from the lower surface of the fixing seat 511; the screw member 513 is connected to the fixing seat 511, and the screw member 513 can be a top screw structure threadedly connected to the fixing seat 511. The screw member 513 passes through one end of the fixing seat 511 and abuts against the adjustment block 512. In this way, by adjusting the relative position of the screw member 513 and the fixing seat 511, the height of the adjustment block 512 protruding from the fixing seat 511 can be adjusted, thereby adjusting the distance between the adjustment block 512 and the second rotating member 322.

[0077] Preferably, the material of the adjustment block 512 is POM (polyoxymethylene), which has high strength and low friction coefficient to reduce the rotational resistance of the second rotating member 322 .

[0078] Furthermore, in this embodiment, if Figures 6 to 9 As shown, a receiving groove 3122 is provided on the side of the second support member 312 facing the first support member 311. The receiving groove 3122 is arranged on the side of the connecting hole 310 away from the clamping assembly 51 and is connected to the connecting hole 310, that is, the connecting hole 310 extends from the bottom of the receiving groove 3122 toward the direction close to the clamping assembly 51, and the circumferential side wall of the fastener 53 is formed with a protruding limiting portion. The main body of the fastener 53 can be formed as a bolt with a thread on the circumferential side wall. The limiting portion can be a nut structure on the bolt. The limiting portion is arranged in the receiving groove 3122 and abuts against the bottom of the receiving groove 3122 to achieve axial limitation of the fastener 53.

[0079] Specifically, if Figures 6 to 9As shown, the connecting hole 310 on the second support member 312 for the fastener 53 to pass through is formed as a strip hole, specifically an arc-shaped strip hole, so that the fastener 53 can slide along the extension track of the strip hole; the hole wall thickness of the connecting hole 310 at one end in its length direction is H1 to form a thin-walled side 31211, and the hole wall thickness of the connecting hole 310 at the other end in its length direction is H2, H2>H1, to form a thick-walled side 31212, so that the hole wall thickness of the connecting hole 310 at both ends in its length direction is different.

[0080] More specifically, in the depth direction of the connecting hole 310, the bottom of the thick-walled side 31212 protrudes from the bottom of the thin-walled side 31211, so that when the fastener 53 moves from the thin-walled side 31211 to the thick-walled side 31212, the limiting portion as described above will move downward, thereby driving the clamping assembly 51 to move toward the direction close to the second support member 312 to reduce the distance between the clamping assembly 51 and the second rotating member 322, wherein preferably, the top of the thick-walled side 31212 is arranged flush with the top of the thin-walled side 31211.

[0081] Preferably, H2-H1≤2mm, and the thin-walled side 31211 transitions to the thick-walled side 31212 in a smooth bevel transition.

[0082] In this embodiment, if Figures 6 to 9 As shown, a limiting protrusion 3221 protruding toward the anti-sway mechanism 50 is formed on the second rotating member 322, and the limiting protrusion 3221 can be set on the circumferential side wall of the second rotating member 322. When the second rotating member 322 drives the limiting protrusion 3221 to rotate to abut against the connecting sleeve 52, under the action of external force, the limiting protrusion 3221 can push the connecting sleeve 52 and the fastener 53 to move from the thin-walled side 31211 to the thick-walled side 31212, so that the fastener 53 drives the clamping assembly 51 to move toward 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, so that the clamping assembly 51 moves downwardly to the second rotating member 322, reducing the gap between the second rotating member 322 and the clamping assembly 51, thereby further reducing the swing amplitude of the second rotating member 322, so that the overall swing amplitude fed back to the chair frame 10 will be smaller.

[0083] In this embodiment, if Figures 5 to 8As shown, the dental chair base also includes a reset mechanism 60, which is mounted in a mounting slot 3222 defined in the second rotatable member 322. The mounting slot 3222 is defined in the sidewall of the top of the second rotatable member 322, such that the mounting slot 3222 extends through the outer sidewall of the second rotatable member 322. The reset mechanism 60, disposed in the mounting slot 3222, does not protrude from the upper surface of the second rotatable member 322. Specifically, the reset mechanism 60 includes a reset block and an elastic member, which is a torsion spring, mounted below the reset block. When the reset mechanism 60 is not subjected to external force, at least a portion of the reset block extends out of the mounting slot 3222 and protrudes from the sidewall of the second rotatable member 322.

[0084] Alternatively, as Figure 8 As shown, the end of the reset block away from its rotation axis is formed as a protrusion 61, and the side wall of the reset block connected to the protrusion 61 is formed as an inclined portion 62. When the reset mechanism 60 is not subjected to external force, part of the inclined portion 62 can extend out of the mounting groove 3222. The inclined portion 62 is an inclined surface structure, and the protrusion 61 can be formed as an arc-shaped surface or an inclined surface structure protruding toward the rotation axis away from the reset block. When the protrusion 61 is a inclined surface structure, the inclination angle of the inclined portion 62 is gentler than the inclination angle of the protrusion 61.

[0085] The second rotating member 322 can rotate in a first rotation direction or a second rotation direction. The first rotation direction is opposite to the second rotation direction. Figure 8 The second rotation direction is counterclockwise from the viewing angle. Figure 8 Clockwise direction of view.

[0086] In this embodiment, rotating the second rotating member 322 along the first rotation direction causes the connecting sleeve 52 to move from the thin-walled side 31211 to the thick-walled side 31212, and the fastener 53 drives the clamping assembly 51 to move toward 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 provision of the inclined portion 62, when the reset block and the connecting sleeve 52 are intertwined during the rotation of the second rotating member 322 along the first rotation direction, the elastic member will twist to drive the reset block to move toward the direction of extending into the mounting groove 3222 to avoid the connecting sleeve 52, so that the reset block will not push the connecting sleeve 52 to the thick-walled side 31212, but will only push it to the thick-walled side 31212 when the limiting protrusion 3221 contacts the connecting sleeve 52.

[0087] When the second rotating member 322 is rotated in the second rotation direction, the reset stopper can be driven to push the connecting sleeve 52 away from the thick-walled side 31212 (specifically, the protrusion 61 contacts the connecting sleeve 52 and pushes the connecting sleeve 52 away from the thick-walled side 31212 during the rotation of the second rotating member 322). When the connecting sleeve 52 is pushed to move to the thin-walled side 31211, the connecting sleeve 52 remains in contact with the thin-walled side 31211 and the connecting sleeve 52 cannot move. The elastic member is blocked by the thin-walled side 31211 to produce a torsional deformation and drive the reset stopper to rotate in the direction of extending into the installation groove 3222. The second rotating member 322 continues to rotate in the second rotation direction so that the reset stopper is no longer blocked, that is, until the reset stopper is separated from the connecting sleeve 52, the elastic member is deformed and the reset stopper is reset. This will not affect the subsequent rotation of the second rotating member 322 in the first rotation direction.

[0088] In a preferred embodiment, Figure 5 As shown, two groups of anti-sway mechanisms 50 are provided, and the two groups of anti-sway mechanisms 50 are arranged opposite to each other along the rotation axis of the rotating component 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, and the first direction X is perpendicular to the second direction Y. When the chair frame 10 is rotated to the maximum angle position (that is, the chair position commonly used during treatment, due to the influence of the installation direction of other instruments of the dental chair, it is determined that the chair frame 10 needs to be fixed when it is rotated to the commonly used chair position to ensure the anti-sway effect), that is Figure 1 and Figure 2 In the position shown, the anti-sway mechanism 50 is arranged within the angle formed by the first direction X and the second direction Y. The angle between the line connecting the middle of the anti-sway mechanism 50 and the rotation axis of the rotating component 32 and the first direction X is β, 20°≤β≤60°, so that it has a reliable anti-sway effect.

[0089] In a preferred embodiment, β=45°, at this time, whether the chair frame 10 shakes in the length direction or the width direction, the best anti-shaking effect can be achieved. The reason is that Figure 5 As shown, when the chair frame 10 wobbles in the longitudinal direction, it rotates approximately about the second direction Y. Since β = 45°, the anti-sway mechanism 50 has a longer moment arm in the second direction Y. At this time, the moment arm is approximately L = Rsin45°, where R is the straight-line distance from the axis of the rotating assembly 32 to the anti-sway mechanism 50. Alternatively, when the chair frame 10 wobbles in the width direction, it rotates approximately about the first direction X. At this time, the moment arm of the anti-sway mechanism 50 is approximately L = Rcos45°.

[0090] It should be noted that in actual use, shaking is a dynamic process, so it is necessary to ensure that the shaking amplitude in the length direction is small as well as the shaking amplitude in the width direction. Therefore, when β=45°, the shaking amplitude of multi-directional shaking can be effectively reduced.

[0091] According to 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, 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 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 support 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 provided between the second rotating member and the second support member, so that the horizontal movement of the chair frame is achieved by rotating the rotating assembly relative to the support assembly, so that medical staff can rotate the chair frame to a position convenient for their operation, thereby improving the comfort of medical staff during treatment; the second support member is clamped between the first rotating member and the second rotating member, so that the support The fitting clearance between the support assembly and the rotating assembly is small, so the amplitude of the shaking generated when it is finally transmitted to the chair frame is also very small, thereby ensuring the stability of the chair seat during horizontal rotation; 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, and 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, and the rotating driving member causes the locking member to slide in a direction approaching or away from the fixed member to increase or reduce 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 are rotationally limited when they approach each other, so that the locking assembly can be used to prevent the relative rotation of the rotating assembly and the support assembly after the chair frame is rotated to the desired angle, thereby achieving reliable fixation of the chair frame and meeting treatment needs.

[0092] 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 described in detail here.

[0093] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A dental chair base, characterized in that: The dental chair base comprises: Lifting mechanism; A base, comprising a supporting assembly and a rotating assembly; The support assembly includes a first support member and a second support member; the first support member and the second support member are both formed into a plate-like structure, 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 provided between the second rotating member and the second supporting member.

2. The dental chair base according to claim 1, characterized in that: The base further includes a locking assembly, the locking assembly comprising: a fixed member, mounted on the second rotating member; a driving member, rotatably connected to the fixing member; The locking member forms a spiral pair with the driving member; the locking member is formed with a first clamping portion abutting against the fixed member and a second clamping portion abutting against the second supporting member, the first clamping portion and the second clamping portion are arranged at an angle, and the driving member is rotated to make the locking member slide in a direction approaching or away from the fixed member to increase or decrease the extrusion force applied to the second rotating member and the second supporting member, so that the second rotating member and the second supporting member are rotationally limited when they approach each other.

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

4. The dental chair base according to claim 1, characterized in that: The dental chair base also includes an anti-sway mechanism, which includes: a clamping assembly located above the second rotating member, the clamping assembly being provided with a connecting portion protruding from the second rotating member; a connecting sleeve, sandwiched between the connecting portion and the second supporting member; A fastener passes through the connecting portion, the connecting sleeve and the connecting hole on the second supporting member in sequence, thereby installing the clamping assembly on the second supporting member.

5. The dental chair base according to claim 4, characterized in that: The clamping assembly comprises: A fixing seat is provided above the second rotating member, and the connecting portion is provided on the fixing seat; an adjusting block, disposed on a side of the fixing seat facing the second rotating member; The screwing piece is connected to the fixing seat, and one end of the screwing piece passes through the fixing seat and 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 hole, and the fastener can slide along the extension track of the strip hole; the hole wall thickness of the connecting hole at one end in its length direction is H1 to form a thin-walled side; the hole wall thickness of the connecting hole at the other end in its length direction is H2, H2>H1, to form a thick-walled side, and in the depth direction of the connecting hole, the bottom of the thick-walled side protrudes from the bottom of the thin-walled side.

7. The dental chair base according to claim 6, characterized in that: A limiting protrusion protruding toward the anti-sway 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 from the thin-walled side to the thick-walled side, so that the fastener drives the clamping assembly to move toward the direction close to the second support member to reduce the distance between the clamping assembly and the second rotating member.

8. The dental chair base according to claim 6, characterized in that: The dental chair base also includes: a reset mechanism mounted in a mounting groove formed in the second rotating member, the reset mechanism comprising a reset block and an elastic member mounted below the reset block, wherein when the reset mechanism is not subjected to an external force, at least a portion of the reset block extends out of the mounting groove and protrudes from a side wall of the second rotating member; Rotating the second rotating member along the first rotation direction causes the connecting sleeve to move from the thin-walled side to the thick-walled side, and the fastener drives the clamping assembly to move in a direction close to the second support member to reduce the distance between the clamping assembly and the second rotating member; rotating the second rotating member along the second rotation direction can drive the reset block to push the connecting sleeve away from the thick-walled side. After pushing the connecting sleeve to move to the thin-walled side, the elastic member is blocked by the thin-walled side, causing torsional deformation and driving the reset block to rotate in a direction extending into the mounting groove. When the reset block is continued to rotate along the second rotation direction so that the reset block is no longer blocked, the elastic member is deformed and the reset block is reset; 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 lifting movement of the chair frame. The anti-sway mechanism is provided with two groups. The two groups of anti-sway 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, and the width direction of the chair frame is the second direction. The first direction is perpendicular to the second direction. The anti-sway mechanism is arranged within the angle formed by the first direction and the second direction. The angle between the line connecting the anti-sway 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: The dental chair base comprises the dental chair base according to any one of claims 1 to 9.

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