Dental chair and dental chair control method

Abstract

The present invention relates to the field of medical device technology, and in particular to a dental chair and a dental chair control method, the dental chair comprising: a fixed frame, a seat cushion frame and a leg support, the seat cushion frame being rotatably connected to the fixed frame and the leg support respectively; a first output end for driving the leg support to rotate relative to the seat cushion frame is formed on the rotating member; the driving member is telescopic and can drive the rotating member to rotate, the rotation center line of the rotating member passes through point E, the first connecting rod unit is rotatably connected to the first output end at point F, and the first connecting rod unit is rotatably connected to the leg support at point G; when the rotating member rotates so that the leg support transforms the dental chair from a folded state to an unfolded state, the first output end pushes the first connecting rod unit, point F moves from top to bottom and the distance of the connecting line EG formed by connecting points E and G first decreases and then increases, so that the rotation angle of the leg support relative to the seat cushion frame first increases and then decreases, so that after the dental chair is fully unfolded, the patient's legs can be slightly bent instead of fully straightened, and will not tilt upward, thereby improving comfort.

Description

Technical Field

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

[0002] A dental chair is a comprehensive dental treatment chair used to treat dental diseases. Common dental chairs require control of the angles between the backrest, seat cushion, and leg rest during use to accommodate different treatment positions. Chinese patent application CN202311819573.2 discloses a three-fold dental chair. When the dental chair is unfolded for the patient to lie flat, the seat cushion is tilted, causing the leg rest to tilt upward, raising the patient's legs and affecting patient comfort. Furthermore, existing dental chair leg rests all utilize a single motor for direct rotation. While this solves the problem of adjusting the leg rest's degree of freedom, the added motor not only increases costs but also requires a larger installation space on the dental chair to accommodate the motor that drives the dental chair to fold or unfold, resulting in a large dental chair and inconvenient layout. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a dental chair and a dental chair control method to solve the problem that when the existing dental chair is unfolded, the seat cushion is in a tilted state, causing the leg rest to lift the patient's legs to an upward tilted state, affecting the patient's comfort.

[0004] A first aspect of the present invention provides a dental chair, wherein the dental chair comprises:

[0005] A chair frame assembly, comprising a fixed frame, a seat cushion frame and a leg support frame, wherein the seat cushion frame is rotatably connected to the fixed frame, and the leg support frame is rotatably connected to the seat cushion frame;

[0006] a drive assembly comprising a drive member mounted on the seat cushion frame and a linkage assembly mounted on the fixed frame, the linkage assembly comprising a rotating member and a first connecting rod unit, the rotating member being formed with a first output end for driving the leg bracket to rotate relative to the seat cushion frame, the first connecting rod unit being rotatably connected to the first output end and the leg bracket, respectively;

[0007] The driving member is telescopic and can drive the rotating member to rotate, and the rotation centerline of the rotating member passes through point E. The first connecting rod unit and the first output end are rotationally connected at point F, and the first connecting rod unit and the leg support are rotationally connected at point G; when the rotating member rotates to cause the leg support to transform the dental chair from a folded state to an unfolded state, the first output end pushes the first connecting rod unit, and the point F moves from top to bottom and the distance of the connecting line EG formed by connecting the point E and the point G first decreases and then increases, so that the rotation angle of the leg support relative to the seat cushion frame first increases and then decreases.

[0008] Preferably, when the point F moves downward so that the distance between it and the connecting line EG gradually decreases, the distance between the point E and the point G gradually increases, so that the angle between the leg support and the seat cushion frame increases, until the point F moves downward to be collinear with the connecting line EG, and the leg support is unfolded to the maximum rotation angle relative to the seat cushion frame; the first output end continues to push the first connecting rod unit to drive the point F to continue to move downward, so that the distance between the line between the point F and the connecting line EG gradually increases, and at this time the distance between the point E and the point G gradually decreases, so that the rotation angle of the leg support relative to the seat cushion frame is reduced.

[0009] Preferably, after the rotation angle of the leg bracket relative to the seat cushion frame is reduced, the end of the leg bracket away from the seat cushion frame is no higher than the end of the leg bracket rotatably connected to the seat cushion frame.

[0010] Preferably, the linkage assembly further comprises a second connecting rod unit, the rotating member is formed with a second output end for driving the seat cushion frame to rotate relative to the fixed frame, and the second connecting rod unit is rotatably connected to the second output end and the seat cushion frame respectively;

[0011] When the leg support rotates relative to the seat cushion frame, the seat cushion frame rotates relative to the fixing frame.

[0012] Preferably, the chair frame assembly further comprises a backrest frame rotatably connected to the seat cushion frame, wherein the backrest frame is arranged at an end of the seat cushion frame away from the leg support;

[0013] The linkage assembly also includes a third connecting rod unit, and a third output end for driving the backrest frame to rotate relative to the seat cushion frame is formed on the rotating member. The third connecting rod unit is rotationally connected to the third output end and the backrest frame respectively; when the backrest frame rotates downward, the leg support is unfolded accordingly.

[0014] Preferably, the rotating member includes a rod, an input portion and an output portion, the input portion and the output portion are both fixedly connected to the rod portion, the driving member is rotatably connected to an end of the input portion away from the rod portion, and the first output end is arranged on the output portion and is spaced apart from the rotation center of the rotating member.

[0015] Preferably, the seat cushion frame is covered with a seat cushion layer, the backrest frame is covered with a backrest layer, and a headrest is provided at one end of the backrest frame away from the seat cushion frame;

[0016] The dental chair also includes:

[0017] The airbag system includes a first inflatable member arranged on the cushion layer and a second inflatable member arranged on the backrest layer. The first inflatable member is arranged on a side of the cushion layer close to the backrest frame; the second inflatable member is arranged on a side of the backrest layer close to the headrest.

[0018] Preferably, the first inflatable member extends to both sides of the seat cushion layer in the width direction of the dental chair, and the second inflatable member extends to both sides of the backrest layer in the width direction of the dental chair.

[0019] Preferably, an inflation cavity is formed inside the first inflatable member and the second inflatable member; and the airbag system further includes a control valve communicated with the inflation cavity.

[0020] The second aspect of the present invention provides a dental chair control method, which is applied to the dental chair implementation described in the above technical solution; the airbag system has a linkage control mode and an independent control mode;

[0021] In the linkage control mode, the control valve is in communication with the driving member so that the airbag system can identify the movement position of the driving member. When the driving member is driven to 1 / 2 of the total stroke, the control valve opens and inflates the first inflatable member and the second inflatable member.

[0022] When the driving member stops driving and moves to 1 / 5 of the total stroke, the first inflatable member and the second inflatable member are both inflated to a preset maximum inflation volume, and the control valve turns off the inflation mode. During the subsequent contraction of the driving member, the control valve continues to remain closed.

[0023] When the driving member stops driving and moves to 1 / 5 to 1 / 2 of the total stroke, if the driving member is in a retracted state, the control valve turns on the inflation mode; if the driving member is in an expanded state, the control valve turns on the deflation mode;

[0024] When the driving member moves to a stroke outside of 1 / 5 to 1 / 2 of the total stroke, the control valve is closed, and at this time, neither inflation nor deflation occurs;

[0025] In the linkage control mode, the control valve is disconnected from the driving member.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] In the dental chair of the present invention, the chair frame assembly includes a fixed frame, a seat cushion frame and a leg support frame, the seat cushion frame is rotatably connected to the fixed frame, and the leg support frame is rotatably connected to the seat cushion frame; the driving assembly includes a driving member installed on the seat cushion frame and a linkage assembly installed on the fixed frame, the linkage assembly includes a rotating member and a first connecting rod unit, the rotating member is formed with a first output end for driving the leg support frame to rotate relative to the seat cushion frame, and the first connecting rod unit is rotatably connected to the first output end and the leg support respectively; the driving member is telescopic to drive the rotating member to rotate, the rotation center line of the rotating member passes through point E, and the first connecting rod unit is rotatably connected to the first output end at F Point, the first connecting rod unit and the leg support are connected to point G; when the rotating part rotates to make the leg support transform the dental chair from a folded state to an unfolded state, the first output end pushes the first connecting rod unit, and point F moves from top to bottom and the distance of the connecting line EG formed by connecting points E and G first decreases and then increases, so that the rotation angle of the leg support relative to the seat cushion frame first increases and then decreases, realizing the leg support to be unfolded first and then retracted, so that after the dental chair is fully unfolded, the patient's legs can be slightly bent instead of fully straightened, and the entire leg will not be tilted upward, thereby improving the patient's comfort during treatment.

[0028] In addition, with the dental chair control method of the present invention, doctors can choose whether the airbag system is in linkage control mode or independent control mode according to actual needs, further improving the patient's comfort during treatment.

[0029] 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

[0030] 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.

[0031] Figure 1 A schematic diagram of the structure of a dental chair in a folded state provided by an embodiment of the present invention;

[0032] Figure 2 A cross-sectional view of the structure of a dental chair in a folded state provided by an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of the structure of a dental chair provided by an embodiment of the present invention when the leg support is unfolded to the maximum angle;

[0034] Figure 4A schematic diagram of the structure of a dental chair provided by an embodiment of the present invention in which the leg support rotates downward to achieve retraction in the unfolded state;

[0035] Figure 5 A schematic side view of the structure of the dental chair provided by an embodiment of the present invention, in which the leg support is rotated downward to achieve retraction in the unfolded state;

[0036] Figure 6 A schematic diagram of a top view of the structure of a dental chair provided by an embodiment of the present invention, in which the leg support is rotated downward to achieve retraction in the unfolded state;

[0037] Figure 7 A schematic structural diagram of a dental chair provided by an embodiment of the present invention in an unfolded state and at another viewing angle, wherein the leg support rotates downward to achieve retraction;

[0038] Figure 8 This is a schematic structural diagram of the airbag system in a dental chair provided by an embodiment of the present invention.

[0039] Icons: 10-fixed frame; 11-installation part; 20-cushion frame; 30-leg support; 40-backrest frame; 50-driving member; 60-linkage assembly; 61-rotating member; 62-rod; 63-input part; 64-output part; 601-first connecting rod unit; 602-second connecting rod unit; 603-third connecting rod unit; 611-first output end; 612-second output end; 613-third output end; 71-cushion layer; 72-backrest layer; 73-headrest; 81-first inflatable member; 82-second inflatable member. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] According to a first aspect of the present invention, a dental chair is provided, which includes a chair frame assembly and a drive assembly.

[0050] Hereinafter, the specific structures of the above-mentioned components of the dental chair according to the present embodiment will be described.

[0051] In this embodiment, if Figures 1 to 7 As shown, the chair frame assembly includes a fixed frame 10, a seat cushion frame 20 and a leg support 30. The fixed frame 10 is fixed relative to the base of the dental chair. The seat cushion frame 20 is arranged above the fixed frame 10 and is mainly used to support the patient's buttocks. The seat cushion frame 20 is rotatably connected to the fixed frame 10, so that the position and angle of the patient's buttocks can be adjusted during the switching process of folding and unfolding the dental chair; the leg support 30 is mainly used to support the patient's calves and feet. The leg support 30 is rotatably connected to the seat cushion frame 20, and the relative position relationship of the patient's buttocks and calves can be adjusted by adjusting the angle between the leg support 30 and the seat cushion frame 20.

[0052] like Figures 1 to 7As shown, the drive assembly includes a drive member 50 mounted on the seat cushion frame 20 and a linkage assembly 60 mounted on the fixed frame 10. The drive member 50 can be a linear motion mechanism capable of extension and retraction, such as an electric push rod or a pneumatic push rod. The drive member 50 is rotatably connected to the seat cushion frame 20, and the end of the drive member 50 that enables extension and retraction is connected to the linkage assembly 60, thereby driving the linkage assembly 60 to rotate. Preferably, the seat cushion frame 20 is formed as a hollow frame structure, and the drive member 50 is mounted inside the seat cushion frame 20, thereby reducing the size of the dental chair. The linkage assembly 60 is mounted on the fixed frame 10. Specifically, the fixed frame 10 is provided with a mounting portion 11. The mounting portion 11 is a plate-like structure and is located on the side of the fixed member facing the seat cushion frame 20. The seat cushion frame 20 and the linkage assembly 60 are both rotatably connected to the mounting portion 11. Preferably, two mounting portions 11 are provided, and the two mounting portions 11 are arranged opposite each other in the width direction of the dental chair to improve the installation reliability and stability of the linkage assembly 60 and the seat cushion frame 20.

[0053] In this embodiment, if Figures 1 to 7 As shown, the linkage assembly 60 includes a rotating member 61 and a first connecting rod unit 601. The rotating member 61 is formed with a first output end 611 for driving the leg support 30 to rotate relative to the seat cushion frame 20. The first connecting rod unit 601 is rotatably connected to the first output end 611 and the leg support 30, respectively, so that the driving force of the driving member 50 is transmitted to the first connecting rod unit 601 via the first output end 611 of the rotating member 61, thereby driving the leg support 30 to rotate relative to the seat cushion frame 20. In the radial direction of the rotating member 61 (i.e., in a direction perpendicular to the rotation centerline of the rotating member 61), the first output end 611 and the second output end 612 and the third output end 613 described below are spaced apart from the rotation centerline of the rotating member 61, so that the first output end 611, the second output end 612, and the third output end 613 can move around the rotation centerline of the rotating member 61 when the rotating member 61 rotates.

[0054] In this embodiment, if Figure 1 、 Figure 3 and Figure 5 As shown, the driving member 50 is telescopic and can drive the rotating member 61 to rotate, the rotation center line of the rotating member 61 passes through point E, the first connecting rod unit 601 and the first output end 611 are rotationally connected at point F (here it can be understood that the first connecting rod unit 601 and the first output end 611 are hinged at point F), and the first connecting rod unit 601 and the leg bracket 30 are rotationally connected at point G (here it can be understood that the first connecting rod unit 601 and the leg bracket 30 are hinged at point G); when the rotating member 61 rotates so that the leg bracket 30 transforms the dental chair from a folded state to an unfolded state, the backrest frame 40 described below gradually rotates downward, and the dental chair is Figure 1In the folded state from a visual perspective, EFG form a triangle, and point F is located above the line EG formed by connecting points E and G. The first output end 611 pushes the first connecting rod unit 601, and point F moves from top to bottom, and the distance between point F and the line EG first decreases and then increases, so that the rotation angle of the leg support 30 relative to the seat cushion frame 20 first increases and then decreases, so that the leg support 30 is first deployed and then retracted, and the patient gradually lies flat during the deployment process of the leg support 30. After the dental chair is fully deployed, the patient's legs can be slightly bent instead of fully straightened, and the entire leg will not be tilted upward, thereby improving the patient's comfort during treatment.

[0055] It should be noted that points E, F and G are located on the same plane. Specifically, the plane is arranged perpendicular to the rotation center line of the rotating member 61. For example, the plane is parallel to the output part 64 of the plate-like structure described below, or the plane is coplanar with the plane where the output part 64 of the plate-like structure is located.

[0056] Specifically, in this embodiment, the leg bracket 30 is Figures 1 to 3 During the unfolding of the posture, point F moves downward so that the distance between it and the line EG gradually decreases. During this process, the distance between point E and point G gradually increases, so that the leg bracket 30 is continuously unfolded outward, and the angle between the leg bracket 30 and the seat cushion frame 20 increases, until point F moves downward to be collinear with the line EG (i.e. Figure 3 The leg support portion is in the state shown in FIG. 1 ), the leg support 30 is unfolded to the maximum rotation angle relative to the seat cushion frame 20, thereby realizing the first unfolding of the leg support 30 as described above; the first output end 611 continues to push the first connecting rod unit 601 to drive point F to continue to move downward (i.e., point F is no longer collinear with the connecting line EG but moves below the connecting line EG), so that the distance between point F and the connecting line EG gradually increases (i.e., see FIG. 1 ). Figure 5 The leg support 30 is in the state shown in FIG. 1 ), at this time, the distance between point E and point G gradually decreases, so that the rotation angle of the leg support 30 relative to the seat cushion frame 20 is reduced, thereby achieving the retraction of the leg support 30 after being deployed as described above.

[0057] In this embodiment, if Figure 1 、 Figure 3 and Figure 5 As shown, after the rotation angle of the leg support 30 relative to the seat cushion frame 20 is reduced, that is, after the leg support 30 and the seat cushion frame 20 rotate relative to each other until the leg support 30 retreats, the end of the leg support 30 away from the seat cushion frame 20 is not higher than the end of the leg support 30 and the seat cushion frame 20 that are rotatably connected. This ensures that after the dental chair is fully unfolded, the patient's legs are slightly bent and the calves are in a downward tilted posture, ensuring the patient's comfort during treatment.

[0058] It should be noted that if the angle between the leg support 30 and the seat cushion frame 20 continues to increase during the unfolding of the dental chair, the end of the leg support 30 away from the seat cushion frame 20 will continue to rise, and the patient's legs may easily feel uncomfortable during the treatment. The present application improves the patient's comfort by retracting the leg support after unfolding.

[0059] Furthermore, in this embodiment, Figures 1 to 7 As shown, the linkage assembly 60 also includes a second connecting rod unit 602, and a second output end 612 is formed on the rotating member 61 for driving the seat cushion frame 20 to rotate relative to the fixed frame 10. The second connecting rod unit 602 is rotatably connected to the second output end 612 and the seat cushion frame 20 respectively. In this way, when the driving member 50 drives the rotating member 61 to rotate, the second output end 612 can push the seat cushion frame 20 to rotate relative to the fixed frame 10, thereby realizing the linked rotation of the seat cushion frame 20 relative to the fixed frame 10 when the leg support 30 rotates relative to the seat cushion frame 20.

[0060] In this embodiment, if Figures 1 to 7 As shown, the chair frame assembly also includes a backrest frame 40 rotatably connected to the seat cushion frame 20, and the backrest frame 40 is arranged at one end of the seat cushion frame 20 away from the leg support 30, and is mainly used to support the patient's back; the linkage assembly 60 also includes a third connecting rod unit 603, and a third output end 613 for driving the backrest frame 40 to rotate relative to the seat cushion frame 20 is formed on the rotating member 61. The third connecting rod unit 603 is rotatably connected to the third output end 613 and the backrest frame 40 respectively. In this way, when the driving member 50 drives the rotating member 61 to rotate, the third connecting rod unit 603 is rotated. The output end 613 can rotate the backrest frame 40 relative to the seat cushion frame 20, so that when the backrest frame 40 rotates downward, the leg support 30 is deployed accordingly. In this way, the backrest frame 40, the seat cushion frame 20 and the leg support 30 can be linked by the drive of only one driving member 50. However, the dental chair in the prior art can only control the independent rotation of the backrest frame 40 relative to the seat cushion frame 20, which results in the seat cushion frame 20 in the prior art being fixed at an unchanged angle, and thus unable to better adapt to the angle of the backrest frame 40. In the present application, when the backrest frame 40 rotates, the seat cushion frame 20 can adaptably rotate within a small range, and the leg support 30 can also be deployed accordingly, further improving the patient's comfort, simplifying the structure of the dental chair, and reducing the volume of the dental chair.

[0061] In this embodiment, the structure of the first connecting rod unit 601, the second connecting rod unit 602 or the third connecting rod unit 603 can be a single rod, or a combination formed by multiple rotating connected rods, or a plate-like structure or a combination of a plate-like structure and a rod-like structure rotatably connected. As long as it can transmit power to the leg support 30, the seat cushion frame 20 or the backrest frame 40 when the rotating member 61 rotates, the dental chair can be unfolded or folded.

[0062] Furthermore, in this embodiment, Figures 1 to 7 As shown, the rotating member 61 includes a rod portion 62, an input portion 63 and an output portion 64. The rod portion 62 is formed as a rod-like structure extending in the horizontal direction, such as a cylindrical rod-like structure. The input portion 63 is formed as a rod-like structure extending outward on the side wall of the rod portion 62 along a rotation center line perpendicular to the rod portion 62. The output portion 64 can be formed as a plate-like structure. The input portion 63 and the output portion 64 are both fixedly connected to the rod portion 62, so that the input portion 63, the rod portion 62 and the output portion 64 rotate synchronously under the drive of the driving member 50.

[0063] Specifically, the retractable end of the driving member 50 is rotatably connected to the end of the input part 63 away from the rod part 62, and the first output end 611, the second output end 612 and the third output end 613 are all arranged on the output part 64 and are respectively spaced apart from the rotation center of the rotating member 61. The first output end 611, the second output end 612 and the third output end 613 can be formed as a hinge hole opened on the output part 64, and the first output end 611, the second output end 612 and the third output end 613 are connected in sequence to form a triangular structure.

[0064] Preferably, in this embodiment, Figures 1 to 7 As shown, the rod portion 62 and the input portion 63 are provided with one and are installed inside the seat cushion frame 20, the output ends are arranged in pairs at both ends of the rod portion 62 in the length direction and are arranged on the side of the outside of the seat cushion frame 20, and each output portion 64 is provided with a first output end 611, a second output end 612 and a third output end 613. The first connecting rod unit 601, the second connecting rod unit 602 and the third connecting rod unit 603 are each provided with two and are respectively located on both sides of the outside of the seat cushion frame 20 to improve the smoothness of the switching of the dental chair between the folded and unfolded states.

[0065] In this embodiment, if Figure 8 As shown, the outside of the seat cushion frame 20 is covered with a cushion layer 71, which can cover the seat cushion frame 20 and at least part of the leg support 30. The outside of the backrest frame 40 is covered with a backrest layer 72. The cushion layer 71 and the backrest layer 72 can be protective layers with sponge inside and PU material outside, making the dental chair soft. A headrest 73 is provided at the end of the backrest frame 40 away from the seat cushion frame 20. The headrest 73 is used to support the patient's neck and head.

[0066] In order to further improve the patient's comfort during treatment, the dental chair also includes an airbag system, which includes a first inflatable member 81 arranged on the cushion layer 71 and a second inflatable member 82 arranged on the backrest layer 72. The first inflatable member 81 and the second inflatable member 82 are elastic and can increase in volume when gas enters the interior and decrease in volume when the internal gas is discharged. The first inflatable member 81 and the second inflatable member 82 can be made of a hollow rubber material. Specifically, the first inflatable member 81 is arranged on the side of the cushion layer 71 close to the backrest frame 40, so that the first inflatable member 81 can support the patient's waist, so that when the patient lies down, the first inflatable member 81 expands to the required volume according to actual needs and supports the patient's waist, avoiding the patient's waist from being suspended in the air, and also avoiding the patient from sliding due to reasons such as the tilt of the cushion; the second inflatable member 82 is arranged on the side of the backrest layer 72 close to the headrest 73, so that the first inflatable member 81 can support the patient's shoulders, specifically the upper side of the shoulders, so that when the patient lies down, the second inflatable member 82 expands to the required volume according to actual needs, further avoiding the patient from sliding, so that the second inflatable member 82 plays a role in positioning the patient's body position, and the patient does not need to repeatedly adjust the position after lying down due to incorrect body position during treatment.

[0067] Preferably, if Figure 8 As shown, the first inflatable member 81 extends along the width direction of the dental chair to both sides of the cushion layer 71 in the width direction of the dental chair, and the second inflatable member 82 extends along the width direction of the dental chair to both sides of the backrest layer 72 in the width direction of the dental chair. This is adapted to patients of different body shapes, ensuring the effectiveness and reliability of preventing patients from slipping and positioning patients when lying down.

[0068] Furthermore, in this embodiment, an inflation cavity is formed inside the first inflatable member 81 and the second inflatable member 82; the airbag system also includes a control valve connected to the inflation cavity, which can be a solenoid valve. The control valve has an inflation mode for controlling the entry of gas into the inflation cavity of the first inflatable member 81 or the second inflatable member 82, a deflation mode for controlling the discharge of gas in the inflation cavity of the first inflatable member 81 or the second inflatable member 82, and a closing mode for preventing external gas from entering the inflation cavity or the discharge of gas in the inflation cavity. In this way, the doctor can control the expansion volume of the first inflatable member 81 or the second inflatable member 82 according to actual needs to meet the comfort needs of patients of different body shapes.

[0069] Preferably, the control valve is in communication with the driver 50. When the driver 50 deploys the dental chair, the first and second inflatable members 81, 82 expand with the dental chair. This allows the inflatable members 81 and 82 to support and position the patient after the patient lies down. It should be noted that the physician can choose to disconnect the control valve from the driver 50 based on actual needs, providing more options for physicians to tailor the comfort needs of patients of varying body types.

[0070] According to the dental chair of the present invention, the chair frame assembly includes a fixed frame, a seat cushion frame and a leg support, the seat cushion frame is rotatably connected to the fixed frame, and the leg support is rotatably connected to the seat cushion frame; the driving assembly includes a driving member installed on the seat cushion frame and a linkage assembly installed on the fixed frame, the linkage assembly includes a rotating member and a first connecting rod unit, the rotating member is formed with a first output end for driving the leg support to rotate relative to the seat cushion frame, the first connecting rod unit is rotatably connected to the first output end and the leg support respectively; the driving member is telescopic to drive the rotating member to rotate, the rotation center line of the rotating member passes through point E, and the first connecting rod unit is rotatably connected to the first output end At point F, the first connecting rod unit and the leg support are connected to point G; when the rotating part rotates to make the leg support transform the dental chair from a folded state to an unfolded state, the first output end pushes the first connecting rod unit, and point F moves from top to bottom and the distance of the connecting line EG formed by connecting points E and G first decreases and then increases, so that the rotation angle of the leg support relative to the seat cushion frame first increases and then decreases, realizing the leg support to be unfolded first and then retracted, so that after the dental chair is fully unfolded, the patient's legs can be slightly bent instead of fully straightened, and the entire leg will not be tilted upward, thereby improving the patient's comfort during treatment.

[0071] According to a second aspect of the present invention, a dental chair control method is provided, which is applied to the dental chair as described above, wherein the airbag system has a linkage control mode and an independent control mode;

[0072] In the linkage control mode, the control valve is in communication with the driver, allowing the airbag system to identify the movement position of the driver. When the driver is driven to 1 / 2 of the total stroke, the control valve opens and slowly inflates the first and second inflatable members.

[0073] When the driving member stops driving and the driving member moves to 1 / 5 of the total stroke, the first inflatable member and the second inflatable member are both inflated to a preset maximum inflation volume (the preset maximum inflation volume is the maximum inflation volume set to avoid explosion of the first inflatable member and the second inflatable member and to ensure the safety of use of the first inflatable member and the second inflatable member. The preset maximum inflation volume of the first inflatable member and the preset maximum inflation volume of the second inflatable member can be the same or different). At this time, the control valve turns off the inflation mode, and the control valve continues to remain closed during the subsequent contraction of the driving member;

[0074] When the driving member stops driving and moves to 1 / 5 to 1 / 2 of the total stroke, if the driving member is in a retracted state, the control valve turns on the inflation mode; if the driving member is in an expanded state, the control valve turns on the deflation mode;

[0075] When the driving member moves to a stroke outside 1 / 5 to 1 / 2 of the total stroke, the control valve is closed, and at this time it neither inflates nor deflates. In the linkage control mode, it can be better adapted to the driving component in the dental chair as described above, so as to adapt the expanded state of the leg support and the inflated state of the first inflatable member and the second inflatable member when adjusting the patient's treatment chair position.

[0076] In the linkage control mode, the control valve is not connected to the driving member. Specifically, the doctor can cancel the communication connection between the control party and the driving member in the suppression control interface. In this way, the inflation or deflation state of the first inflatable member and the second inflatable member can be adjusted according to actual needs to meet the comfort needs of patients of different body shapes.

[0077] With the dental chair control method of the present invention, doctors can select the linkage control mode and the independent control mode of the airbag system according to actual needs, thereby further improving the patient's comfort during treatment.

[0078] 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, characterized in that: The dental chair comprises: A chair frame assembly, comprising a fixed frame, a seat cushion frame and a leg support frame, wherein the seat cushion frame is rotatably connected to the fixed frame, and the leg support frame is rotatably connected to the seat cushion frame; a drive assembly comprising a drive member mounted on the seat cushion frame and a linkage assembly mounted on the fixed frame, the linkage assembly comprising a rotating member and a first connecting rod unit, the rotating member being formed with a first output end for driving the leg bracket to rotate relative to the seat cushion frame, the first connecting rod unit being rotatably connected to the first output end and the leg bracket, respectively; The driving member is telescopic and can drive the rotating member to rotate. The rotation centerline of the rotating member passes through point E. The first connecting rod unit and the first output end are rotationally connected at point F. The first connecting rod unit and the leg bracket are rotationally connected at point G. When the rotating member rotates so that the leg bracket transforms the dental chair from a folded state to an unfolded state, the first output end pushes the first connecting rod unit, and point F moves from top to bottom. The distance between the connecting line EG formed by connecting points E and G first decreases and then increases, so that the rotation angle of the leg bracket relative to the seat cushion frame first increases and then decreases. When the point F moves downward so that the distance between it and the connecting line EG gradually decreases, the distance between the point E and the point G gradually increases, so that the angle between the leg support and the seat cushion frame increases, until the point F moves downward to be collinear with the connecting line EG, and the leg support unfolds to the maximum rotation angle relative to the seat cushion frame; the first output end continues to push the first connecting rod unit to drive the point F to continue to move downward, so that the distance between the line between the point F and the connecting line EG gradually increases, and at this time the distance between the point E and the point G gradually decreases, so that the rotation angle of the leg support relative to the seat cushion frame decreases.

2. The dental chair according to claim 1, characterized in that: After the rotation angle of the leg bracket relative to the seat cushion frame is reduced, the end of the leg bracket away from the seat cushion frame is no higher than the end of the leg bracket rotatably connected to the seat cushion frame.

3. The dental chair according to claim 1, characterized in that: The linkage assembly further includes a second connecting rod unit, the rotating member is formed with a second output end for driving the seat cushion frame to rotate relative to the fixed frame, and the second connecting rod unit is rotatably connected to the second output end and the seat cushion frame respectively; When the leg support rotates relative to the seat cushion frame, the seat cushion frame rotates relative to the fixing frame.

4. The dental chair according to claim 1, characterized in that: The chair frame assembly further comprises a backrest frame rotatably connected to the seat cushion frame, wherein the backrest frame is arranged at an end of the seat cushion frame away from the leg support; The linkage assembly also includes a third connecting rod unit, and a third output end for driving the backrest frame to rotate relative to the seat cushion frame is formed on the rotating member. The third connecting rod unit is rotationally connected to the third output end and the backrest frame respectively; when the backrest frame rotates downward, the leg support is unfolded accordingly.

5. The dental chair according to claim 1, characterized in that: The rotating member includes a rod, an input portion and an output portion, wherein the input portion and the output portion are both fixedly connected to the rod, the driving member is rotatably connected to an end of the input portion away from the rod, and the first output end is arranged on the output portion and is spaced apart from the rotation center of the rotating member.

6. The dental chair according to claim 4, characterized in that: The seat cushion frame is covered with a seat cushion layer on the outside, the backrest frame is covered with a backrest layer on the outside, and a headrest is provided at one end of the backrest frame away from the seat cushion frame; The dental chair also includes: The airbag system includes a first inflatable member arranged on the cushion layer and a second inflatable member arranged on the backrest layer. The first inflatable member is arranged on a side of the cushion layer close to the backrest frame; the second inflatable member is arranged on a side of the backrest layer close to the headrest.

7. The dental chair according to claim 6, characterized in that: The first inflatable member extends to both sides of the seat cushion layer in the width direction of the dental chair, and the second inflatable member extends to both sides of the backrest layer in the width direction of the dental chair.

8. The dental chair according to claim 6, characterized in that: An inflation cavity is formed inside the first inflatable member and the second inflatable member; the airbag system further includes a control valve communicated with the inflation cavity.

9. A dental chair control method, characterized in that: Applicable to the implementation of the dental chair described in claim 8; the airbag system has a linkage control mode and an independent control mode; In the linkage control mode, the control valve is in communication with the driving member so that the airbag system can identify the movement position of the driving member. When the driving member is driven to 1 / 2 of the total stroke, the control valve opens and inflates the first inflatable member and the second inflatable member. When the driving member stops driving and moves to 1 / 5 of the total stroke, the first inflatable member and the second inflatable member are both inflated to the preset maximum inflation volume, and the control valve turns off the inflation mode. During the subsequent contraction of the driving member, the control valve continues to remain closed. When the driving member stops driving and moves to 1 / 5 to 1 / 2 of the total stroke, if the driving member is in a retracted state, the control valve turns on the inflation mode; if the driving member is in an expanded state, the control valve turns on the deflation mode; When the driving member moves to a stroke outside 1 / 5 to 1 / 2 of the total stroke, the control valve is closed, and at this time, neither inflation nor deflation occurs; In the linkage control mode, the control valve is disconnected from the driving member.

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