Diagnosis and treatment chair with multi-section stretching type foot rest

Abstract

The invention provides a diagnosis and treatment chair with a multi-section stretching type foot rest. The diagnosis and treatment chair comprises a chair body and a stretching type foot rest device. The chair body comprises a base and a seat. The seat comprises a cushion unit and a backrest unit. The stretching type foot rest device is arranged on the cushion unit and comprises an actuator, a first support unit and a secondary stretching unit, wherein the actuator is fixed to the base or the cushion unit, the first support unit is arranged on the cushion unit in a pivoted mode and provided with a first stretching track, and the secondary stretching unit is arranged on the first stretching track and connected to the movable end of the actuator in a pivoted mode. The secondary stretching unit comprises a second support unit, a second stretching track arranged on the second support unit and a stretching section arranged on the second stretching track. And the extension section is linked with the second bracket unit, so that the second bracket unit is linked with the extension section to extend in a secondary section manner when extending along the first extension track. Through the multi-section stretching foot rest, the stretching length of the foot rest is greatly increased, support is provided for the whole leg, the pressure of joints and muscles is reduced, and the effect of supporting the whole leg is achieved.

Description

Technical Field

[0001] The present invention relates to a dental chair, and more particularly to a dental chair with a multi-stage extendable footrest. Background Art

[0002] A dental chair is a special chair for patients to sit or lie on when a dentist performs a diagnosis or treatment. Generally speaking, a dental chair is designed to be both comfortable and convenient for the comfort of the operation. It not only enables the operator to maintain a fixed posture during the operation, but also gives the dentist sufficient space and perspective for diagnosis and treatment. Most advanced dental chairs on the market also have many other tools and equipment, such as lighting, a water suction device, a water nozzle, etc., to facilitate the doctor's treatment.

[0003] Most dental chairs can adjust the height and tilt angle, allowing the doctor to perform the operation or treatment from the best angle and height. And to ensure the comfort of the patient during the treatment, these chairs usually come with cushions and good support to avoid the discomfort of the patient sitting for a long time during the operation. All in all, a dental chair is an indispensable device in a dental clinic, with multiple functions and a certain degree of professionalism required to know how to adjust the seat. Summary of the Invention

[0004] The main object of the present invention is to provide a dental chair with a multi-stage extendable footrest, including a chair body and an extendable footrest device. The chair body includes a base and a seat disposed on the base. The seat includes a cushion unit and a backrest unit. The extendable footrest device is disposed on the cushion unit. The extendable footrest device includes an actuator fixed to the base or the cushion unit, a first bracket unit pivotally disposed on the cushion unit and having a first extension track, and a secondary extension unit disposed on the first extension track and pivotally connected to the movable end of the actuator. The secondary extension unit includes a second bracket unit, a second extension track disposed on the second bracket unit, and an extension section disposed on the second extension track, wherein the extension section is linked to the second bracket unit through a linkage mechanism, so that when the second bracket unit extends along the first extension track, the extension section is linked to extend along the secondary section of the second extension track.

[0005] Furthermore, the linkage mechanism assembly includes a first guiding mechanism and a second guiding mechanism symmetrically disposed on both sides of the first bracket unit. The first guiding mechanism includes a first guiding plate member fixed to the first side of the first bracket unit and a first double-link mechanism. One end of the first double-link mechanism is pivotally provided on the first side of the second bracket unit, and the other end is pivotally provided on the extension section. The joint portion of the first double-link mechanism is movably disposed on the first limiting track on the first guiding plate member and is capable of sliding along the first limiting track. The second guiding mechanism includes a second guiding plate member fixed to the second side of the first bracket unit and a second double-link mechanism. One end of the second double-link mechanism is pivotally provided on the second side of the second bracket unit, and the other end is pivotally provided on the extension section. The joint portion of the second double-link mechanism is movably disposed on the second limiting track on the second guiding plate member and is capable of sliding along the second limiting track.

[0006] Furthermore, the first limiting track and the second limiting track respectively include a first end point corresponding to the extended state of the extension section, a second end point corresponding to the retracted state of the extension section, and an arc section between the first end point and the second end point.

[0007] Furthermore, a connecting rod is disposed between the first guiding plate member and the second guiding plate member.

[0008] Furthermore, vertical rods extending downward from the chair body are respectively disposed on both sides of the chair body, and a diagonal brace mechanism with two ends pivotally provided at the lower ends of the vertical rods and the first bracket unit respectively.

[0009] Furthermore, the diagonal brace mechanism is a nitrogen gas rod, a hydraulic rod or a damper.

[0010] Furthermore, a plurality of grooves are disposed on the extension section.

[0011] Furthermore, the backrest unit is disposed in cooperation with a pivoting device and flips relative to the seat unit with the rotation axis of the pivoting device as the center.

[0012] Furthermore, the base includes a base, a lifting unit disposed on the base, and a bracket disposed on the lifting unit. The bracket is for the seat unit and the backrest unit to be disposed.

[0013] Furthermore, the lifting unit raises or lowers the bracket according to a control instruction.

[0014] Therefore, through the multi-stage extendable footrest of the present invention, the extending length of the footrest can be greatly extended, providing support for the entire leg, reducing the pressure on joints and muscles, and achieving the effect of full-leg support. In addition, the structure of the present invention enables the extension section to perform secondary extension through mechanical linkage design, eliminating the need to configure another set of actuators for secondary extension. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic external view of the dental chair in the present invention.

[0016] Figure 2 This is a side schematic view of the first state of the dental chair in the present invention.

[0017] Figure 3 This is a side schematic view of the second state of the dental chair in the present invention.

[0018] Figure 4 This is a partial enlarged schematic view of the second state of the dental chair in the present invention from the first perspective.

[0019] Figure 5 This is a partial enlarged schematic view of the second state of the dental chair in the present invention from the second perspective.

[0020] Figure 6 This is a partial enlarged schematic view of the second state of the dental chair in the present invention from the third perspective. The markings in the figure are as follows:

[0021] 100 Dental chair

[0022] 10 Chair body

[0023] 11 Base

[0024] 111 Base

[0025] 112 Lifting unit

[0026] 113 Bracket

[0027] 1131 Bearing unit

[0028] 1132 Bearing unit

[0029] 12 Seat

[0030] 121 Cushion unit

[0031] 122 Armrest unit

[0032] 123 Backrest unit

[0033] 124 Headrest unit

[0034] 13 Pivoting device

[0035] 131 Rotating shaft

[0036] A1 Arrow

[0037] 21 Actuator

[0038] 211 Movable end

[0039] P1 Axis position

[0040] 22 First bracket unit

[0041] 221 First extension track

[0042] 23 Extension unit

[0043] D1 First end

[0044] D2 Second end

[0045] 231 Second support unit

[0046] 232 Second extension track

[0047] 233 Extension section

[0048] P2 Axis position

[0049] CA Groove Detailed implementation mode

[0050] The detailed description and technical content of the present invention will be described below in conjunction with the accompanying drawings. For the convenience of description and to facilitate understanding of the technical content of the present invention, some content may not be drawn according to the actual proportion. These proportions and shapes are not intended to limit the scope of the present invention, which is hereby stated in advance.

[0051] In the present invention, the "one side" can be, for example but not limited to, the "left side", "right side", "front side", "rear side", "upper side" or "lower side" of the target object or any other position close to the target object, which is hereby stated in advance.

[0052] The following is a specific embodiment of the present invention described in conjunction with the accompanying drawings. Please refer to Figure 1 , which is a schematic external view of the dental chair in the present invention. As shown in the figure: The dental chair 100 of this embodiment mainly includes a chair body 10, an extendable footrest device 20 provided on the chair body 10, and a control device 30 for generating control instructions to control the working modes of various devices of the chair body 10. In the present invention, the "dental chair", although described with a dental chair as an example, is not limited to a dental chair. The dental chair described can be, for example but not limited to, an ophthalmic chair, an otolaryngology chair, a plastic surgery chair, an obstetrics / gynecology chair, a urology chair, a rehabilitation treatment chair, a general medical chair or other similar medical and surgical seats, which are not limited in the present invention.

[0053] In the present invention, the control device 30 can be, for example but not limited to, a control circuit board, a relay, a personal computer, a workstation, a host computer or other types of controllers, and its type is not limited here.

[0054] In one embodiment, in an embodiment employing a control circuit board, the processor of the control circuit board may be coupled to a storage unit. The processor is, for example, a Central Processing Unit (CPU), or other programmable general-purpose or special-purpose microprocessors, Digital Signal Processors (DSPs), programmable controllers, Application Specific Integrated Circuits (ASICs), Programmable Logic Devices (PLDs), or other similar devices or combinations of these devices, which are not limited in the present invention.

[0055] Regarding the detailed structure of the dental chair in the present invention, please refer to the following together Figure 2 and Figure 3 , which are the side schematic diagrams of the first state and the second state of the dental chair in the present invention, as shown in the figure: Specifically, the "first state" of the dental chair described in the present invention refers to the state where the backrest of the dental chair is upright and the extendable footrest device 20 is retracted; the "second state" of the dental chair described in the present invention refers to the state where the dental chair is tilted and lying flat and the extendable footrest device 20 is extended. This is stated in advance here.

[0056] In this embodiment, the chair body 10 mainly includes a base 11 and a seat 12 provided on the base 11. In one embodiment, the seat 12 can be mainly divided into four parts, namely a seat cushion unit 121, an armrest unit 122, a backrest unit 123, and a headrest unit 124.

[0057] In one embodiment, in order to adjust the height of the seat 12, the base 11 mainly includes a base 111, a lifting unit 112 provided on the base 111, and a bracket 113 provided on the lifting unit 112. The lifting unit 112 is connected to the control device 30 and raises or lowers the bracket 113 according to the control instruction received by the control device 30, thereby adjusting the height of the seat 12. The bracket 113 is provided for the seat cushion unit 121 and the backrest unit 123 to support the seat cushion unit 121 and the backrest unit 123 through the bracket 113. The headrest unit 124 is provided on the backrest unit 123 so that the headrest position of the headrest unit 124 is located on the upper side of the backrest unit 123. The armrest unit 122 is provided on both sides of the backrest unit 123 to provide support for the patient to get up. In other embodiments, the headrest unit 124 and the seat cushion unit 121 can also be directly connected to the bracket 113, taking the bracket 113 as the backbone of the entire dental chair. The variations of these embodiments are not limited in the present invention.

[0058] To adjust the angle of the backrest unit 123, the backrest unit 123 is arranged in cooperation with the pivoting device 13 and pivots relative to the seat cushion unit 121 with the rotating shaft 131 of the pivoting device 13 as the axis. In an embodiment, bearing units 1131 and 1132 fixed on the bracket 113 are respectively arranged on both sides of the backrest unit 123. The pivoting device 13 includes a motor, and the shaft of the motor passes through the two bearing units 1131 and 1132 to provide support and is combined with the backrest unit 123. In an embodiment, the motor may be, for example, a DC motor, an AC motor, a stepping motor, a servo motor, an electromagnetic motor or other similar devices.

[0059] The extensible footrest device 20 is arranged on the seat cushion unit 121. While the seat 12 changes from the sitting state to the lying state (i.e., when the backrest unit 123 flips downward, refer to Figure 3 arrow A1) and extends, and extends the length of the extended footrest to provide appropriate support for the patient. In another embodiment, the actuator 21 of the extensible footrest device 20 may also be arranged at a position where the position of the base 11 relative to the seat cushion unit 121 remains unchanged (for example, on the bracket that cooperates with the seat cushion unit 121 to move on the base 11). The variations of these embodiments are not limited in the present invention.

[0060] For the detailed structure of the extensible footrest device 20, please refer to Figure 4 and Figure 5 , which are the partial enlarged schematic diagrams of the second state of the examination chair in the present invention from the first perspective and the second perspective. As shown in the figure: The extensible footrest device 20 mainly includes an actuator 21 fixed on the seat cushion unit 121, a first bracket unit 22 pivotally arranged on the seat cushion unit 121 and having a first extension track 221, and a secondary extension unit 23 arranged on the first extension track 221 and connected to the movable end 211 of the actuator 21. In order to turn the first bracket unit 22 and the secondary extension unit 23 thereon from the vertical state to the horizontal state, the movable end 211 of the actuator 21 is pivotally arranged on the secondary extension unit 23. In order to enable the actuator 21 to smoothly push the first bracket unit 22 to flip upward, the movable end 211 of the actuator 21 is pivotally arranged at the axial center position P1 of the secondary extension unit 23, and should be lower than the axial center position P2 where the first bracket unit 22 is pivotally arranged on the seat cushion unit 121 in the height direction (as Figure 2 shown), so that the axial center position P1 serves as a fulcrum to generate a moment arm between the movable end 211 and the axial center position P1, and through the forward (equivalent to Figure 2 and Figure 3 the right side) and upward (equivalent to Figure 2 and Figure 3 the upper side) component forces, the first bracket unit 22 flips upward relative to the seat cushion unit 121.

[0061] In addition, when the movable end 211 of the actuator 21 extends, in addition to pushing the first bracket unit 22 to flip upward, it also pushes the secondary extension unit 23 to move along the first extension track 221 from the first end D1 (corresponding to the retracted end) toward the second end D2 (corresponding to the deployed end). Through the design of the actuator 21, the first bracket unit 22, the first extension track 221, and the secondary extension unit 23 disposed on the first extension track 221, the first-stage extension is formed. That is, the actuator 21 pushes the movable end 211 to flip the first bracket unit 22 and pushes the secondary extension unit 23 to move along the first extension track 221 to extend the length of the extendable footrest device 20.

[0062] Regarding the second-stage extension, the secondary extension unit 23 includes a second bracket unit 231, a second extension track 232 disposed on the second bracket unit 231, and an extension section 233 disposed on the second extension track 232. The extension section 233 is linked to the second bracket unit 231 through a linkage mechanism PA, so that when the second bracket unit 231 of the secondary extension unit 23 extends along the first extension track 221, the extension section 233 is linked to perform a secondary extension along the second extension track 232.

[0063] In an embodiment, the linkage mechanism PA includes a first guiding mechanism PA1 and a second guiding mechanism PA2 symmetrically disposed on both sides of the first bracket unit 22.

[0064] The first guiding mechanism PA1 includes a first guiding plate member PA11 fixed to the first side of the first bracket unit 22 and a first double-link mechanism PA12. The first double-link mechanism PA12 mainly includes two linkages PA121, PA122. One end of the linkage PA121 is pivotally provided at one end of the linkage PA122 to form a joint portion PA123. The linkages PA121 and PA122 rotate relative to each other with the joint portion PA123 as the axis; one end of the first double-link mechanism PA12 (the end of the linkage PA121 relative to the joint portion PA123) is pivotally provided on the first side of the second bracket unit 231, and the other end (the end of the linkage PA122 relative to the joint portion PA123) is pivotally provided on the extension section 233. The joint portion PA123 of the first double-link mechanism PA12 is movably disposed on the first limiting track PA111 on the first guiding plate member PA11 and can slide along the first limiting track PA111. The movement path of the joint portion PA123 is restricted by the first limiting track PA11. In an embodiment, in order to reduce the weight of the extension section 233, a plurality of grooves CA are provided on the extension section 233.

[0065] The second guiding mechanism PA2 includes a second guiding plate member PA21 fixed to the second side of the first bracket unit 22 (the side opposite to the first side of the first bracket unit 22) and a second double-link mechanism PA22. The second double-link mechanism PA22 also mainly includes two linkages PA221 and PA222. One end of the linkage PA221 is pivotally connected to one end of the linkage PA222 to form a joint portion PA223, and the linkage PA221 and the linkage PA222 rotate relative to each other with the joint portion PA223 as the axis. One end of the second double-link mechanism PA22 (the end of the linkage PA221 relative to the joint portion PA223) is pivotally provided on the second side of the second bracket unit 231, and the other end (the end of the linkage PA222 relative to the joint portion PA223) is pivotally provided on the extension section 233. The joint portion PA223 of the second double-link mechanism PA22 is movably arranged on the second limiting track PA211 on the second guiding plate member PA21 and can slide along the second limiting track PA211, and the moving path of the joint portion PA223 is restricted by the second limiting track PA211.

[0066] In order to actuate the extension section 233 and achieve force balance, the first guiding mechanism PA1 and the second guiding mechanism PA2 are arranged in a mirror image configuration so that the mechanisms on both sides are synchronized in stroke.

[0067] Next, please refer to Figure 6 together. This is a partial enlarged schematic view of the second state of the treatment chair in the present invention from a third perspective. As shown in the figure: In an embodiment, the first limiting track PA111 includes a first end point F1 corresponding to the retracted state of the extension section 233, a second end point F2 corresponding to the extended state of the extension section 233, and an arc section TR1 between the first end point F1 and the second end point F2; the second limiting track PA211 includes a first end point G1 corresponding to the retracted state of the extension section 233, a second end point G2 corresponding to the extended state of the extension section 233, and an arc section TR2 between the first end point G1 and the second end point G2. In order to enable the extension section 233 to move to the first end of the second extension track 232 and be in a retracted state when the joint portions PA123 and PA223 move to the first end points F1 and G1, and to enable the extension section 233 to move to the second end of the second extension track 232 and be in an extended state when the joint portions PA123 and PA223 move to the second end points F2 and G2, the distance DT1 between the first end point F1 and the second end point G1 is greater than the distance DT2 between the second end point F2 and the second end point G2. Thus, the lengths of the first double-link mechanism PA12 and the second double-link mechanism PA22 are controlled by adjusting the distance between the joint portion PA123 and the joint portion PA223.

[0068] In one embodiment, a connecting rod PA3 is disposed between the first guiding plate member PA11 and the second guiding plate member PA21. Through the arrangement of the connecting rod PA3, the force between the first guiding plate member PA11 and the second guiding plate member PA21 is balanced.

[0069] Please refer to Figure 5 , in one embodiment, in order to provide appropriate support for the first bracket unit 22 when it is flipped to the horizontal, vertical rods 14A and 14B extending downward from the chair body 10 are respectively disposed on both sides of the chair body 10, a diagonal brace mechanism 15A with two ends pivotally disposed at the lower end of the vertical rod 14A and the first bracket unit 22 respectively, and a diagonal brace mechanism 15B with two ends pivotally disposed at the lower end of the vertical rod 14B and the first bracket unit 22 respectively. By the diagonal brace mechanisms 15A and 15B, the shear rigidity of the first bracket unit 22 is increased, so that the structure reduces lateral deformation under the action of a horizontal load. In a further embodiment, the diagonal brace mechanisms 15A and 15B can be nitrogen rods, hydraulic rods or dampers. When the first bracket unit 22 is retracted, energy is collected by the damper, so as to reduce the burden on the actuator 21 when the first bracket unit 22 is extended (usually needs to bear the weight of the patient together).

[0070] In summary, through the multi-stage extendable footrest of the present invention, the extension length of the footrest can be greatly extended, support is provided for the entire leg, the pressure on joints and muscles is reduced, and the effect of full-leg support is achieved. In addition, the structure of the present invention enables the extension section to perform secondary extension through a mechanical linkage design, without the need to arrange another set of actuators for secondary extension.

[0071] The present invention has been described in detail above. The above description is only one preferred embodiment of the present invention, and the scope of implementation of the present invention cannot be limited thereby. That is, all equivalent changes and modifications made according to the scope of the patent application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A diagnosis and treatment chair with a multi-section extendable footrest, characterized in that, Comprising: A chair body, including a base and a seat disposed on the base, the seat including a cushion unit and a backrest unit; And An extendable footrest device disposed on the cushion unit, the extendable footrest device including an actuator fixed to the base or the cushion unit, a first bracket unit pivotally disposed on the cushion unit and having a first extension track, and a secondary extension unit disposed on the first extension track and pivotally connected to the movable end of the actuator, the secondary extension unit including a second bracket unit, a second extension track disposed on the second bracket unit, and an extension section disposed on the second extension track, wherein the extension section is linked to the second bracket unit through a linkage mechanism combination, so that when the second bracket unit extends along the first extension track, the extension section is linked to extend along the second extension track.

2. The medical treatment chair with a multi-section extendable footrest according to claim 1, characterized in that, The linkage mechanism combination includes a first guiding mechanism and a second guiding mechanism symmetrically disposed on both sides of the first bracket unit. The first guiding mechanism includes a first guiding plate member fixed to the first side of the first bracket unit and a first double-link mechanism. One end of the first double-link mechanism is pivotally disposed on the first side of the second bracket unit, and the other end is pivotally disposed on the extension section. The joint portion of the first double-link mechanism is movably disposed on a first limiting track on the first guiding plate member and can slide along the first limiting track. The second guiding mechanism includes a second guiding plate member fixed to the second side of the first bracket unit and a second double-link mechanism. One end of the second double-link mechanism is pivotally disposed on the second side of the second bracket unit, and the other end is pivotally disposed on the extension section. The joint portion of the second double-link mechanism is movably disposed on a second limiting track on the second guiding plate member and can slide along the second limiting track.

3. The medical treatment chair with a multi-stage extendable footrest according to claim 2, wherein The first limiting track and the second limiting track respectively include a first end point corresponding to the extended state of the extension section, a second end point corresponding to the retracted state of the extension section, and an arc section between the first end point and the second end point.

4. The medical treatment chair with a multi-stage extendable footrest according to claim 2, characterized in that, A connecting rod is disposed between the first guiding plate member and the second guiding plate member.

5. The medical treatment chair with a multi-section extendable footrest according to claim 1, characterized in that, Vertical rods extending downward from the chair body are respectively disposed on both sides of the chair body, and a diagonal brace mechanism with two ends pivotally disposed on the lower end of the vertical rod and the first bracket unit respectively.

6. The medical treatment chair with a multi-section extendable footrest according to claim 5, characterized in that, The diagonal brace mechanism is a gas spring, an oil pressure rod or a damper.

7. The medical treatment chair with a multi-section extendable footrest according to claim 1, characterized in that, A plurality of grooves are disposed on the extension section.

8. The medical treatment chair with a multi-section extendable footrest according to claim 1, characterized in that, The backrest unit is disposed in cooperation with a pivoting device and flips relative to the cushion unit with the rotation axis of the pivoting device as the center.

9. The medical examination chair with a multi-stage extendable footrest according to claim 1, characterized in that, The base includes a base, a lifting unit disposed on the base, and a bracket disposed on the lifting unit, and the bracket is for disposing the cushion unit and the backrest unit.

10. The medical examination chair with a multi-stage extendable footrest according to claim 9, characterized in that, The lifting unit raises or lowers the bracket according to a control instruction.

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