Three-fold dental chair with retractable leg support and dental chair

Abstract

The present invention relates to the field of medical device technology, and in particular to a telescopic leg support for a three-fold dental chair and a dental chair. The telescopic leg support for the three-fold dental chair is installed on the main frame of the dental chair, and includes: a driving member is arranged in the main frame; a base assembly has a first rotating part and a second rotating part that are non-coaxially arranged, the first rotating part is connected to the main frame, and the second rotating part is connected to the driving member; the telescopic assembly is slidably connected to the base assembly; and a power assembly is respectively connected to the base assembly and the telescopic assembly. When the driving member extends toward the outside of the main frame, the present invention drives the second rotating part to move in a direction away from the main frame, so as to drive the base assembly to rotate upward around the first rotating part, so that the base assembly is unfolded relative to the main frame. During the unfolding process of the base assembly, the power assembly drives the telescopic assembly to slide in a direction away from the main frame. In this way, after the patient sits on the dental chair, the base assembly can be unfolded and the telescopic assembly can be driven to slide to support the patient's legs, making it convenient for the patient to get on and off the dental chair.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a telescopic leg support of a three-fold dental chair and a dental chair. Background Art

[0002] A dental comprehensive treatment chair is also called a dental comprehensive treatment machine, usually referred to as a dental chair for short. It is suitable for the examination, diagnosis and treatment of various dental diseases. A dental chair usually includes a chair frame and a backrest and a seat cushion installed on the chair frame. The structure of the chair frame allows the backrest and the seat cushion to rotate relative to each other. However, in the existing dental chair structure, the seat cushion for supporting the patient's buttocks and the leg rest for supporting the patient's legs are integrated into one, which makes it more troublesome to get on and off the dental chair. In particular, children need to climb up and then turn around and lie down when getting on and off the dental chair. For patients with limited mobility, getting on and off the dental chair is very difficult or even impossible for them to complete the process of getting on and off the dental chair by themselves, which seriously affects the patient's experience. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a three-fold dental chair with a retractable leg rest and a dental chair, so as to solve the problem that the leg rest and the seat cushion are integrated into one in the existing dental chair structure, causing inconvenience to the patient in getting on and off the dental chair.

[0004] A first aspect of the present invention provides a three-fold telescopic leg support for a dental chair, wherein the three-fold telescopic leg support for the dental chair is installed on a main frame of the dental chair, comprising:

[0005] A driving member is arranged in the main frame;

[0006] A base assembly, comprising a first rotating part and a second rotating part which are non-coaxially arranged, wherein the first rotating part is connected to the main frame, and the second rotating part is connected to the driving member, and the driving member is arranged below the base assembly;

[0007] A telescopic assembly, slidably connected to the base assembly;

[0008] A power assembly, connected to the base assembly and the telescopic assembly respectively;

[0009] When the driving member extends toward the outside of the main frame, it drives the second rotating part to move in a direction away from the main frame, so as to drive the base assembly to rotate upward around the first rotating part, so that the base assembly is unfolded relative to the main frame. During the unfolding of the base assembly, the power assembly drives the telescopic assembly to slide in a direction away from the main frame.

[0010] Preferably, the base assembly comprises:

[0011] A bottom plate having the first rotating portion;

[0012] The base frame has the second rotating part, and the base frame is arranged below the bottom plate.

[0013] Preferably, the bottom plate and the bottom frame are movably connected so that the bottom frame and the bottom plate can move relative to each other;

[0014] The base assembly also includes:

[0015] A first protective member is communicatively connected with the driving member, the first protective member is fixed to the bottom plate, and a detection end of the first protective member is connected to the bottom frame;

[0016] When the driving member contracts toward the inside of the main frame, it drives the second rotating part to move toward the direction close to the main frame, so as to drive the base assembly to rotate downward around the first rotating part, so that the base assembly is folded relative to the main frame. During the folding process of the base assembly, the power assembly drives the telescopic assembly to slide toward the direction close to the main frame. When the bottom plate is obstructed during the folding process of the base assembly, causing relative displacement between the bottom plate and the base frame, the first protective member is triggered to control the driving member to stop moving.

[0017] Preferably, the bottom plate is provided with a long strip-shaped guide hole;

[0018] The power assembly comprises a first connecting rod, a second connecting rod, a third connecting rod, a sliding member and a rotating shaft, wherein the two ends of the first connecting rod in the length direction are respectively rotatably connected to the main frame and the sliding member; the sliding member is slidably connected to the guide hole, the two ends of the second connecting rod in the length direction are respectively rotatably connected to the sliding member and one end of the third connecting rod in the length direction, the second connecting rod is rotatably connected to the bottom plate via the rotating shaft, and the other end of the third connecting rod in the length direction is rotatably connected to the telescopic assembly;

[0019] When the driving member extends toward the outside of the main frame, the sliding member moves toward the direction close to the main frame, so that the angle between the second connecting rod and the third connecting rod increases, so as to drive the telescopic assembly to extend toward the direction away from the main frame.

[0020] Preferably, the distance between the rotational connection point between the second connecting rod and the sliding member and the rotating shaft is smaller than the distance between the rotational connection point between the second connecting rod and the third connecting rod and the rotating shaft.

[0021] Preferably, the length direction of the guide hole extends along the sliding direction of the telescopic assembly;

[0022] The second connecting rod is provided with a strip-shaped sliding groove, and the sliding member is slidably connected to the sliding groove.

[0023] Preferably, it also includes:

[0024] The sliding assembly comprises a sliding rail and a sliding seat respectively connected to the telescopic assembly and the base assembly, the sliding seat is slidably connected to the sliding rail, and the sliding rail extends along the sliding direction of the telescopic assembly.

[0025] Preferably, the telescopic assembly comprises:

[0026] The installation portion is provided with an installation slot;

[0027] A rotating member, installed in the installation slot, wherein the rotating member is rotationally connected to the third connecting rod;

[0028] A second protective member is communicatively connected with the driving member and installed in the installation slot, wherein the rotating member and the second protective member are spaced apart in the installation slot along the sliding direction of the telescopic assembly;

[0029] an elastic member, installed in the installation groove and sandwiched between the rotating member and the second protective member;

[0030] When the mounting portion is blocked, the elastic member is compressed, so that the rotating member triggers the second protecting member to control the driving member to stop moving.

[0031] Preferably, the telescopic assembly further comprises:

[0032] The protection part is arranged on the top of the installation part and covers the installation groove.

[0033] A second aspect of the present invention provides a dental chair, comprising the three-fold dental chair telescopic leg rest described in any of the above technical solutions.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The three-fold dental chair telescopic leg rest of the present invention is installed on the main frame of the dental chair, and the driving member is arranged in the main frame; the base assembly has a first rotating part and a second rotating part which are non-coaxially arranged, the first rotating part is connected to the main frame, and the second rotating part is connected to the driving member and the driving member is arranged below the base assembly; the telescopic assembly is slidably connected to the base assembly; the power assembly is respectively connected to the base assembly and the telescopic assembly; when the driving member extends toward the outside of the main frame, it can drive the second rotating part to move in the direction away from the main frame, so as to drive the base assembly to rotate upward around the first rotating part, so that the base assembly is unfolded relative to the main frame, and during the unfolding process of the base assembly, the power assembly drives the telescopic assembly to slide in the direction away from the main frame, so that the base assembly can be unfolded and the telescopic assembly can be driven to slide after the patient sits on the dental chair to support the patient's legs, which is convenient for the patient to get on and off the dental chair and meets the use needs of different patients.

[0036] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A schematic structural diagram of a telescopic leg support of a three-fold dental chair in a folded state provided by an embodiment of the present invention;

[0039] Figure 2 A schematic structural diagram of a telescopic leg support of a three-fold dental chair provided by an embodiment of the present invention after the telescopic components are disassembled in a folded state;

[0040] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0041] Figure 4 A structural cross-sectional view of a telescopic leg support of a three-fold dental chair provided by an embodiment of the present invention in a folded state;

[0042] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0043] Figure 6 A schematic structural diagram of a telescopic leg support of a three-fold dental chair in an unfolded state provided by an embodiment of the present invention;

[0044] Figure 7 A schematic structural diagram of a telescopic leg support for a three-fold dental chair provided by an embodiment of the present invention with the mounting portion and the protective portion disassembled in an unfolded state;

[0045] Figure 8 A schematic structural diagram of a telescopic leg support for a three-fold dental chair provided by an embodiment of the present invention, in which the protective portion and the mounting portion are separated in an unfolded state;

[0046] Fig. 9 for Figure 8 Schematic diagram of the enlarged structure at C in the middle;

[0047] Fig.10 A schematic structural diagram of the bottom of a telescopic leg rest of a three-fold dental chair provided in an embodiment of the present invention in an unfolded state.

[0048] Icons: 1-main frame; 10-driving member; 20-base assembly; 201-first rotating part; 202-second rotating part; 21-bottom plate; 211-guide hole; 22-base frame; 23-first protective member; 30-power assembly; 31-first connecting rod; 32-second connecting rod; 321-slide groove; 33-third connecting rod; 34-sliding member; 35-rotating shaft; 40-telescopic assembly; 41-installation part; 411-installation groove; 42-rotating member; 43-second protective member; 44-elastic member; 45-protective part; 51-slide rail; 52-slide seat. DETAILED DESCRIPTION

[0049] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0050] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0051] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” 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 bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0052] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0053] 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 only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0054] For ease of description, spatial relational 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 spatial relational terms are intended to include 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 will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0055] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0056] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0057] The features of the examples described herein may 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.

[0058] According to a first aspect of the present invention, a three-fold dental chair telescopic leg rest is provided, which includes a driving member 10, a base assembly 20, a telescopic assembly 40 and a power assembly 30.

[0059] Hereinafter, the specific structures of the above-mentioned components of the telescopic leg support of the three-fold dental chair according to the present embodiment will be described.

[0060] In this embodiment, if Figures 1 to 10 As shown, the telescopic leg rest of the three-fold dental chair is installed on the main frame 1 of the dental chair, and a seat cushion for supporting the patient's buttocks is installed on the main frame 1 of the dental chair. The driving member 10 is arranged in the main frame 1. The driving member 10 can be a telescopic cylinder or a linear motor or other devices, as long as it can be extended toward the outside of the main frame 1 or retracted toward the inside of the main frame 1. The driving end of the driving member 10 is formed as a rod-shaped structure; the base assembly 20 has a first rotating part 201 and a second rotating part 202 that are non-coaxially arranged, the first rotating part 201 is connected to the main frame 1, and the second rotating part 202 is connected to the driving member 10 and the driving member 10 is arranged below the base assembly 20; the telescopic assembly 40 is slidably connected to the base assembly 20; the power assembly 30 is respectively connected to the base assembly 20 and the telescopic assembly 40.

[0061] like Figure 1 and Figure 6 As shown, after the patient sits on the dental chair, the driving member 10 extends toward the outside of the main frame 1 and can drive the second rotating part 202 to move in a direction away from the main frame 1, so as to drive the base assembly 20 to rotate upward around the first rotating part 201, so that the base assembly 20 is unfolded relative to the main frame 1. During the unfolding of the base assembly 20, the power assembly 30 drives the telescopic assembly 40 to slide in a direction away from the main frame 1. In this way, after the patient sits on the dental chair, the base assembly 20 can be unfolded and the telescopic assembly 40 can be driven to slide to support the patient's legs. When the treatment is over, the driving member 10 contracts toward the inside of the main frame 1 and can drive the second rotating part 202 to move in a direction close to the main frame 1, so as to drive the base assembly 20 to rotate downward around the first rotating part 201, so that the base assembly 20 is folded relative to the main frame 1. During the folding of the base assembly 20, the power assembly 30 drives the telescopic assembly 40 to slide in a direction close to the main frame 1, so as to facilitate the patient to get on and off the dental chair and meet the usage needs of different patients.

[0062] Specifically, in this embodiment, Figures 1 to 10 As shown, the base assembly 20 includes a bottom plate 21 and a bottom frame 22, the bottom plate 21 has a first rotating portion 201, the bottom frame 22 has a second rotating portion 202, and the bottom frame 22 is arranged below the bottom plate 21. The bottom plate 21 is formed into a plate-like structure, the first rotating portion 201 is arranged on the edge of the bottom plate 21 close to the main frame 1, so that the base assembly 20 is rotated from an approximately vertical position to an approximately horizontal position during the unfolding process, the bottom frame 22 is formed into a rod-like structure, the second rotating portion 202 is arranged at one end of the bottom frame 22 in the length direction, and the other end of the bottom frame 22 in the length direction is connected to the bottom plate 21.

[0063] Preferably, if Fig.10As shown, a plurality of base frames 22 are provided, and the plurality of base frames 22 are arranged at intervals along a sliding direction perpendicular to the telescopic assembly 40 , and the driving member 10 is arranged one-to-one with the base frames 22 to improve the driving stability and reliability of the driving member 10 .

[0064] In a preferred embodiment, Fig.10 As shown, the bottom plate 21 and the bottom frame 22 are movably connected, so that the bottom frame 22 and the bottom plate 21 can move relative to each other, for example, the bottom plate 21 and the bottom frame 22 are connected via a pin shaft to realize the rotation connection between the bottom plate 21 and the bottom frame 22. The base assembly 20 also includes a first protective member 23 that is connected to the drive member 10 in communication, and the first protective member 23 can be a micro switch. The first protective member 23 is fixed to the bottom plate 21, and the detection end of the first protective member 23 is connected to the bottom frame 22; during the folding process of the base assembly 20, if the bottom plate 21 encounters an obstacle, the drive member 10 will continue to shrink toward the inside of the main frame 1, but because the bottom plate 21 is obstructed, the bottom plate 21 and the bottom frame 22 will cause relative displacement, thereby triggering the first protective member 23 to send a signal to control the drive member 10 to stop moving, thereby forming protection during the movement of the base assembly 20 to avoid interference and structural damage.

[0065] Furthermore, in this embodiment, if Figure 2 , Figure 3 , Figures 5 to 8 and Fig.10 As shown, a long strip guide hole 211 is opened on the base plate 21, and the guide hole 211 is a through hole that penetrates the thickness direction of the base plate 21; the power assembly 30 includes a first connecting rod 31, a second connecting rod 32, a third connecting rod 33, a sliding member 34 and a rotating shaft 35, and the first connecting rod 31, the second connecting rod 32 and the third connecting rod 33 are all formed into a strip-shaped rod structure, the first connecting rod 31 is arranged below the base plate 21, and the second connecting rod 32 and the third connecting rod 33 are both arranged above the base plate 21, and the sliding member 34 passes through the guide hole 211, so that the sliding member 34 is slidably connected with the guide hole 211.

[0066] Specifically, the two ends of the first connecting rod 31 in the length direction are rotatably connected to the main frame 1 and the sliding member 34 respectively, and the rotation connection between the first connecting rod 31 and the sliding member 34 is located below the bottom plate 21; the two ends of the second connecting rod 32 in the length direction are rotatably connected to the sliding member 34 and one end of the third connecting rod 33 in the length direction respectively, and the other end of the third connecting rod 33 in the length direction is rotatably connected to the telescopic assembly 40; the second connecting rod 32 is rotatably connected to the bottom plate 21 via the rotating shaft 35, and the setting position of the rotating shaft 35 is located at the rotation connection between the second connecting rod 32 and the sliding member 34 and the third connecting rod 33, so that the second connecting rod 32 can rotate relative to the bottom plate 21. Figure 3 and Figure 6As shown, when the driving member 10 extends toward the outside of the main frame 1, the base plate 21 rotates upward relative to the main frame 1, so that the sliding member 34 moves in the guide hole 211 toward the direction close to the main frame 1, thereby driving the second connecting rod 32 to rotate relative to the base plate 21, so that the angle between the second connecting rod 32 and the third connecting rod 33 increases, and the third connecting rod 33 moves in the direction away from the main frame 1 to drive the telescopic assembly 40 to extend in the direction away from the main frame 1, thereby driving the telescopic assembly 40 to slide while the base assembly 20 is unfolded to support the patient's legs.

[0067] In a preferred embodiment, Figure 3 and Figure 7 As shown, the distance between the rotational connection between the second connecting rod 32 and the sliding member 34 and the rotating shaft 35 is smaller than the distance between the rotational connection between the second connecting rod 32 and the third connecting rod 33 and the rotating shaft 35, so that when the sliding member 34 moves in a small range, the third connecting rod 33 can be driven to move in a large range, that is, by utilizing the lever principle, the telescopic range of the telescopic assembly 40 is greatly improved to meet the use needs of patients with different body shapes.

[0068] Furthermore, in this embodiment, if Figures 6 to 8 As shown, the length direction of the guide hole 211 extends along the sliding direction of the telescopic assembly 40, so that the telescopic assembly 40 can slide in the direction away from the main frame 1 to support the patient's legs; a strip-shaped slide groove 321 is provided on the second connecting rod 32, and the length direction of the slide groove 321 is the same as the length direction of the second connecting rod 32, and the sliding member 34 is slidably connected to the slide groove 321, thereby avoiding the second connecting rod 32 from having a dead point in movement or generating movement interference, which affects the sliding of the telescopic assembly 40.

[0069] In this embodiment, if Figure 2 , Figures 6 to 9As shown, the telescopic assembly 40 includes a mounting portion 41, a rotating member 42 and a second protective member 43. The mounting portion 41 is formed as a plate-like structure, and a mounting groove 411 is provided on the mounting portion 41; the rotating member 42, the second protective member 43 and the elastic member 44 are all installed in the mounting groove 411, and the mounting groove 411 is formed as a strip structure extending along the sliding direction of the telescopic assembly 40. The side wall of the rotating member 42 is formed with a protruding boss, so that the rotating member 42 is clamped in the mounting groove 411, and the rotating member 42 is rotatably connected to the third connecting rod 33; the second protective member 43 is communicatively connected to the driving member 10, and the second protective member 43 can be a pressure sensor or a displacement sensor. The rotating member 42 and the second protective member 43 are spaced apart in the mounting groove 411 along the sliding direction of the telescopic assembly 40, and the elastic member 44 is clamped between the rotating member 42 and the second protective member 43. The elastic member 44 is a spring, and the two ends of the elastic member 44 in the telescopic direction are respectively abutted against the rotating member 42 and the second protective member 43. During normal movement, the position of the rotating member 42 in the mounting groove 411 does not change, so that the third connecting rod 33 can drive the rotating member 42 and then drive the mounting portion 41 to slide. When the mounting portion 41 is obstructed and cannot continue to move under the drive of the third connecting rod 33, the rotating member 42 will slide in the mounting groove 411, so that the elastic member 44 is compressed. The rotating member 42 triggers the second protective member 43 to send a signal to control the driving member 10 to stop moving, thereby forming protection during the movement of the telescopic assembly 40 to avoid interference and structural damage.

[0070] Furthermore, in this embodiment, if Figure 6 and Figure 8 As shown, the telescopic assembly 40 further includes a protection portion 45, which is formed into a plate-like structure and is disposed on the top of the mounting portion 41 and covers the mounting groove 411, thereby protecting the components disposed in the mounting groove 411. The protection portion 45 is detachably connected to the mounting portion 41, such as by snapping, so as to facilitate maintenance or repair of the components disposed in the mounting groove 411.

[0071] In addition, in this embodiment, Figure 2 , Figure 3 , Figures 6 to 8 As shown, the telescopic leg support of the three-fold dental chair also includes a sliding assembly arranged between the telescopic assembly 40 and the base assembly 20. Specifically, the sliding assembly includes a slide rail 51 and a slide seat 52 respectively connected to the telescopic assembly 40 and the base assembly 20. The slide seat 52 can be a slider. The slide seat 52 is slidably connected to the slide rail 51, and the slide rail 51 extends along the sliding direction of the telescopic assembly 40. In an optional embodiment, the slide rail 51 is installed on the top of the bottom plate 21, and the slide seat 52 is installed on the bottom of the telescopic assembly 40, for example, the slide seat 52 is installed on the bottom of the mounting portion 41 as described above.

[0072] The three-fold dental chair telescopic leg support according to the present invention is installed on the main frame of the dental chair, and the driving member is arranged in the main frame; the base assembly has a first rotating part and a second rotating part which are non-coaxially arranged, the first rotating part is connected to the main frame, and the second rotating part is connected to the driving member and the driving member is arranged below the base assembly; the telescopic assembly is slidably connected to the base assembly; the power assembly is respectively connected to the base assembly and the telescopic assembly; after the patient sits on the dental chair, the driving member extends toward the outside of the main frame and can drive the second rotating part to move in a direction away from the main frame, so as to drive the base assembly to rotate upward around the first rotating part, so that the base assembly is unfolded relative to the main frame, and during the unfolding process of the base assembly, the power assembly drives the telescopic assembly to slide in a direction away from the main frame, so that the base assembly can be unfolded and the telescopic assembly can be driven to slide after the patient sits on the dental chair to support the patient's legs, and when the treatment is completed, the driving member shrinks toward the inside of the main frame and can drive the second rotating part to move in a direction close to the main frame, so as to drive the base assembly to rotate downward around the first rotating part, so that the base assembly is folded relative to the main frame, and during the folding process of the base assembly, the power assembly drives the telescopic assembly to slide in a direction close to the main frame, so as to facilitate the patient to get on and off the dental chair and meet the use needs of different patients.

[0073] In addition, the second connecting rod in the power assembly and the bottom plate in the base assembly are rotationally connected via a rotating shaft. The distance between the rotating connection between the second connecting rod and the sliding member and the rotating shaft is smaller than the distance between the rotating connection between the second connecting rod and the third connecting rod and the rotating shaft. By utilizing the principle of leverage, the telescopic range of the telescopic assembly is greatly improved to meet the needs of patients with different body shapes.

[0074] A dental chair provided according to the present invention comprises the above-mentioned three-fold dental chair telescopic leg support, and thus has all the beneficial effects of the three-fold dental chair telescopic leg support, which will not be described in detail herein.

[0075] 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 protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A three-fold dental chair telescopic leg support, characterized in that: The three-fold dental chair telescopic leg support is installed on the main frame of the dental chair, and includes: A driving member is arranged in the main frame; A base assembly, comprising a first rotating part and a second rotating part which are non-coaxially arranged, wherein the first rotating part is connected to the main frame, and the second rotating part is connected to the driving member, and the driving member is arranged below the base assembly; A telescopic assembly, slidably connected to the base assembly; A power assembly, connected to the base assembly and the telescopic assembly respectively; When the driving member extends toward the outside of the main frame, it drives the second rotating part to move in a direction away from the main frame, so as to drive the base assembly to rotate upward around the first rotating part, so that the base assembly is unfolded relative to the main frame. During the unfolding of the base assembly, the power assembly drives the telescopic assembly to slide in a direction away from the main frame.

2. The three-fold telescopic leg support for dental chair according to claim 1, characterized in that: The base assembly comprises: A bottom plate having the first rotating portion; The base frame has the second rotating part, and the base frame is arranged below the bottom plate.

3. The three-fold telescopic leg support for dental chair according to claim 2, characterized in that: The bottom plate and the bottom frame are movably connected so that the bottom frame and the bottom plate can move relative to each other; The base assembly also includes: A first protective member is communicatively connected with the driving member, the first protective member is fixed to the bottom plate, and a detection end of the first protective member is connected to the bottom frame; When the driving member contracts toward the inside of the main frame, it drives the second rotating part to move toward the direction close to the main frame, so as to drive the base assembly to rotate downward around the first rotating part, so that the base assembly is folded relative to the main frame. During the folding process of the base assembly, the power assembly drives the telescopic assembly to slide toward the direction close to the main frame. When the bottom plate is obstructed during the folding process of the base assembly, causing relative displacement between the bottom plate and the base frame, the first protective member is triggered to control the driving member to stop moving.

4. The three-fold telescopic leg support for dental chair according to claim 2, characterized in that: The bottom plate is provided with a long strip-shaped guide hole; The power assembly comprises a first connecting rod, a second connecting rod, a third connecting rod, a sliding member and a rotating shaft, wherein the two ends of the first connecting rod in the length direction are respectively rotatably connected to the main frame and the sliding member; the sliding member is slidably connected to the guide hole, the two ends of the second connecting rod in the length direction are respectively rotatably connected to the sliding member and one end of the third connecting rod in the length direction, the second connecting rod is rotatably connected to the bottom plate via the rotating shaft, and the other end of the third connecting rod in the length direction is rotatably connected to the telescopic assembly; When the driving member extends toward the outside of the main frame, the sliding member moves toward the direction close to the main frame, so that the angle between the second connecting rod and the third connecting rod increases, so as to drive the telescopic assembly to extend toward the direction away from the main frame.

5. The three-fold telescopic leg support for dental chair according to claim 4, characterized in that: The distance between the rotational connection point between the second connecting rod and the sliding member and the rotating shaft is smaller than the distance between the rotational connection point between the second connecting rod and the third connecting rod and the rotating shaft.

6. The three-fold telescopic leg support for dental chair according to claim 4, characterized in that: The length direction of the guide hole extends along the sliding direction of the telescopic assembly; The second connecting rod is provided with a strip-shaped sliding groove, and the sliding member is slidably connected to the sliding groove.

7. The three-fold telescopic leg support for dental chair according to claim 1, characterized in that: Also includes: The sliding assembly comprises a sliding rail and a sliding seat respectively connected to the telescopic assembly and the base assembly, the sliding seat is slidably connected to the sliding rail, and the sliding rail extends along the sliding direction of the telescopic assembly.

8. The three-fold telescopic leg support for dental chair according to claim 4, characterized in that: The telescopic assembly comprises: The installation portion is provided with an installation slot; A rotating member, installed in the installation slot, wherein the rotating member is rotatably connected to the third connecting rod; A second protective member is communicatively connected with the driving member and installed in the installation slot, wherein the rotating member and the second protective member are spaced apart in the installation slot along the sliding direction of the telescopic assembly; an elastic member, installed in the installation groove and sandwiched between the rotating member and the second protective member; When the mounting portion is blocked, the elastic member is compressed, so that the rotating member triggers the second protecting member to control the driving member to stop moving.

9. The three-fold telescopic leg support for dental chair according to claim 8, characterized in that: The telescopic assembly also includes: The protection part is arranged on the top of the installation part and covers the installation groove.

10. A dental chair, characterized in that: The invention comprises the telescopic leg support of a three-fold dental chair according to any one of claims 1 to 9.

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