TWI870129B - An operating chair with multi-section extendable foot pads - Google Patents

Abstract

The present invention provides an operating chair with multi-section extendable foot pads, comprising a chair body and an extendable foot pad device. The chair body comprises a base and a seat. The seat includes a seat cushion unit and a backrest unit. The extendable foot pad device is arranged on the seat cushion unit, and comprises an actuator fixed on the base or the seat cushion unit, a first bracket unit pivoted on the seat 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 comprises a second bracket unit, a second extension track provided on the second support unit, and an extension section provided on the second extension track. The extension section is linked to the second bracket unit, so that when the second bracket unit extends along the first extension track, the extension section is linked to extend.

Description

Treatment chair with multi-position extendable footrest

The present invention relates to a treatment chair, in particular to a treatment chair with a multi-stage extendable footrest.

A dental chair is a special chair where patients sit or lie down while dentists perform treatment. Generally speaking, dental chairs are designed to be comfortable and convenient for the comfort of the patient during the operation. Not only does it allow the patient to maintain a fixed posture during the operation, but it also provides the dentist with enough space and viewing angle to perform the treatment. Most advanced dental chairs on the market also have many other tools and equipment, such as lighting, water aspirators, water nozzles, etc., to facilitate the doctor's treatment.

Most dental chairs can adjust the height and tilt angle, allowing doctors to perform surgery or treatment at the best angle and height. In order to ensure that patients remain comfortable during treatment, these chairs are usually equipped with soft cushions and good support to prevent patients from sitting for a long time during surgery. In short, dental chairs are indispensable equipment in dental clinics. They have multiple functions and require a certain level of expertise to know how to adjust the chair.

The main purpose of the present invention is to provide a treatment chair with a multi-section extendable footrest, including a chair body and an extendable footrest device. The chair body includes a base and a seat arranged on the base. The seat includes a cushion unit and a backrest unit. The extendable footrest device is arranged on the cushion unit. The extendable footrest device includes an actuator fixed to the base or the cushion unit, a first bracket unit pivotally mounted on the cushion unit and having a first extension track, and a secondary extension unit arranged on the first extension track and pivotally connected to the active end of the actuator. The secondary extension unit includes a second bracket unit, a second extension track arranged on the second bracket unit, and an extension section arranged on the second extension track, wherein the extension section is linked to the second bracket unit through a linkage mechanism assembly, so that when the second bracket unit is extended along the first extension track, the linkage extension section is extended along the secondary section of the second extension track.

Furthermore, the linkage mechanism assembly includes a first guide mechanism and a second guide mechanism symmetrically arranged on both sides of the first bracket unit, and the first guide mechanism includes a first guide plate fixed to the first side of the first bracket unit and a first double connecting rod mechanism. One end of the first double connecting rod mechanism is pivoted on the first side of the second bracket unit, and the other end is pivoted on the extension section, and the joint of the first double connecting rod mechanism is movably arranged on the first limit track on the first guide plate and can slide along the first limit track. The second guide mechanism includes a second guide plate fixed to the second side of the first bracket unit and a second double connecting rod mechanism. One end of the second double-link mechanism is pivoted on the second side of the second bracket unit, and the other end is pivoted on the extension section. The joint portion of the second double-link mechanism is movably disposed on the second limit track on the second guide plate and is able to slide along the second limit track.

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 segment between the first end point and the second end point.

Furthermore, a connecting rod is disposed between the first guide plate and the second guide plate.

Furthermore, vertical rods extending downward from the chair body and a diagonal support mechanism with two ends pivotally mounted on the lower end of the vertical rod and the first bracket unit are respectively arranged on both sides of the chair body.

Furthermore, the diagonal support mechanism is a nitrogen rod, a hydraulic rod, or a damper.

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

Furthermore, the backrest unit is arranged in cooperation with the pivot device and is turned over relative to the cushion unit with the rotation axis of the pivot device as the axis.

Furthermore, the base includes a base, a lifting unit arranged on the base, and a bracket arranged on the lifting unit. The bracket is provided for the cushion unit and the backrest unit to be arranged.

Furthermore, the lifting unit lifts or lowers the bracket according to the control command.

Therefore, the invention can significantly extend the extension length of the footrest through the multi-stage extension footrest, provide support for the entire leg, reduce the pressure on the joints and muscles, and achieve the effect of full leg support. In addition, the structure of the invention allows the extension section to be extended through a mechanical linkage design, without the need to set up another set of actuators for the extension of the secondary section.

The detailed description and technical contents of the present invention are described below with the help of drawings. For the convenience of description and understanding of the technical contents of the present invention, some contents may not be drawn according to the actual proportions. Such proportions and shapes are not intended to limit the scope of the present invention, and are hereby explained in advance.

The "side" mentioned in the present invention can be, for example but not limited to, the "left side", "right side", "front side", "back side", "upper side", "lower side" or any other position close to the target object, which is explained here in advance.

The following is an explanation of a specific embodiment based on the present invention with the help of drawings. Please refer to "Figure 1", which is a schematic diagram of the appearance of the treatment chair in the present invention. As shown in the figure: the treatment chair 100 of this embodiment mainly includes a chair body 10, an extendable footrest device 20 arranged on the chair body 10, and a control device 30 for generating control instructions to control the working mode of each device of the chair body 10. Although the "diagnosis and treatment chair" described in the present invention is explained with a dental chair as an example, it is not limited to a dental treatment chair. The diagnosis and treatment chair can be, for example, but not limited to, an ophthalmology diagnosis and treatment chair, an otolaryngology diagnosis and treatment chair, a plastic surgery diagnosis and treatment chair, an obstetrics/gynecology diagnosis and treatment chair, a urology diagnosis and treatment chair, a rehabilitation treatment chair, a general diagnosis and treatment chair, or other similar diagnosis and treatment and surgical chairs, which are not limited in the present invention.

The control device 30 described in the present invention may 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.

In one embodiment, in an embodiment using a control circuit board, the processor of the control circuit board can be coupled to the storage unit. The processor is, for example, a central processing unit (CPU), or other programmable general-purpose or special-purpose microprocessor (Microprocessor), digital signal processor (Digital Signal Processor; DSP), programmable controller, application specific integrated circuits (Application Specific Integrated Circuits; ASIC), programmable logic device (Programmable Logic Device; PLD) or other similar devices or combinations of these devices, which are not limited in the present invention.

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

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

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 disposed on the base 111, and a bracket 113 disposed on the lifting unit 112. The lifting unit 112 is connected to the control device 30, and lifts or lowers the bracket 113 according to the control command received by the control device 30, thereby adjusting the height of the seat 12. The bracket 113 is provided for the cushion unit 121 and the backrest unit 123 to provide support to the cushion unit 121 and the backrest unit 123 through the bracket 113. The headrest unit 124 is disposed 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 disposed on both sides of the backrest unit 123, and provides support for the patient to stand up. In other embodiments, the headrest unit 124 and the cushion unit 121 can also be directly connected to the bracket 113, and the bracket 113 is used as the backbone of the entire treatment chair. The variations of these embodiments are not limited in the present invention.

In order to adjust the angle of the backrest unit 123, the backrest unit 123 is arranged in cooperation with the pivot device 13, and is turned relative to the cushion unit 121 with the rotating shaft 131 of the pivot device 13 as the axis. In one embodiment, the two sides of the backrest unit 123 are respectively provided with bearing units 1131 and 1132 fixed on the bracket 113, and the pivot 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 one embodiment, the motor can be, for example, a DC motor, an AC motor, a stepping motor, a servo motor, an electromagnetic motor or other similar devices.

The extendable footrest device 20 is disposed on the cushion unit 121, and extends when the seat 12 changes from a sitting position to a lying position (i.e., when the backrest unit 123 flips downward, see arrow A1 in "Figure 3"), and extends the length of the footrest to provide appropriate support for the patient. In another embodiment, the actuator 21 of the extendable footrest device 20 can also be disposed at a position where the position of the base 11 relative to the cushion unit 121 does not change (e.g., on a bracket on the base 11 that cooperates with the cushion unit 121 to move), and the variations of these embodiments are not limited in the present invention.

For the detailed structure of the extendable footrest device 20, please refer to "Figure 4" and "Figure 5", which are partial enlarged schematic diagrams of the second state of the treatment chair in the present invention at the first viewing angle and partial enlarged schematic diagrams at the second viewing angle, as shown in the figure: the extendable footrest device 20 mainly includes an actuator 21 fixed to the cushion unit 121, a first bracket unit 22 pivoted on the cushion unit 121 and having a first extension track 221, and a secondary extension unit 23 disposed on the first extension track 221 and connected to the active end 211 of the actuator 21. In order to allow the first bracket unit 22 and the secondary extension unit 23 thereon to flip from a vertical state to a horizontal state, the active end 211 of the actuator 21 is pivoted on the secondary extension unit 23. In order to allow the actuator 21 to smoothly push the first bracket unit 22 to flip upward, the movable end 211 of the actuator 21 pivoted on the axial position P1 of the secondary extension unit 23 should be lower in height than the axial position P2 of the first bracket unit 22 pivoted on the cushion unit 121 (as shown in "Figure 2"), so that the axial position P1 is used as a fulcrum to generate a force arm between the movable end 211 and the axial position P1, and the first bracket unit 22 is flipped upward relative to the cushion unit 121 through the forward (equivalent to the right side of "Figure 2" and "Figure 3") and upward (equivalent to the upper side of "Figure 2" and "Figure 3") components of force.

In addition, when the active end 211 of the actuator 21 is extended, 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 folded end) toward the second end D2 (corresponding to the unfolded end). The first section of extension is formed by the design of the actuator 21, the first bracket unit 22, the first extension track 221, and the secondary extension unit 23 arranged on the first extension track 221. That is, the actuator 21 pushes the active 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.

Regarding the second 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 assembly PA, so that when the second bracket unit 231 of the secondary extension unit 23 is extended along the first extension track 221, the linkage extension section 233 is extended along the second extension track 232.

In one embodiment, the linkage mechanism assembly PA includes a first guiding mechanism PA1 and a second guiding mechanism PA2 symmetrically disposed on two sides of the first bracket unit 22.

The first guide mechanism PA1 includes a first guide plate PA11 fixed to the first side of the first bracket unit 22, and a first double connecting rod mechanism PA12. The first double connecting rod mechanism PA12 mainly includes two connecting rods PA121 and PA122. One end of the connecting rod PA121 is pivoted to one end of the connecting rod PA122 to form a joint portion PA123. The connecting rod PA121 and the connecting rod PA122 rotate relative to each other with the joint portion PA123 as the axis. One end of the first double connecting rod mechanism PA12 (the end of the connecting rod PA121 relative to the joint portion PA123) is pivoted to the second The other end (the end of the connecting rod PA122 opposite to the joint part PA123) of the first side of the bracket unit 231 is pivoted on the extension section 233, and the joint part PA123 of the first double connecting rod mechanism PA12 is movably disposed on the first limit track PA111 on the first guide plate PA11 and can slide along the first limit track PA111, and the movement path of the joint part PA123 is limited by the first limit track PA111. In one embodiment, in order to reduce the weight of the extension section 233, a plurality of grooves CA are disposed on the extension section 233.

The second guide mechanism PA2 includes a second guide plate 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 connecting rods PA221 and PA222. One end of the connecting rod PA221 is pivoted to one end of the connecting rod PA222 to form a joint portion PA223. The connecting rod PA221 and the connecting rod 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 connecting rod PA221 opposite to the joint portion PA223) is pivoted to the second connecting rod PA221. The other end (the end of the connecting rod PA222 relative to the joint part PA223) on the second side of the second bracket unit 231 is pivoted on the extension section 233, and the joint part PA223 of the second double connecting rod mechanism PA22 is movably arranged on the second limit track PA211 on the second guide plate PA21 and can slide along the second limit track PA211, and the movement path of the joint part PA223 is limited by the second limit track PA211.

In order to allow the extension section 233 to move and balance the force, the first guide mechanism PA1 and the second guide mechanism PA2 are configured in a mirror image so that the mechanisms on both sides are synchronized in travel.

Next, please refer to "Figure 6", which is a partially enlarged schematic diagram of the second state of the treatment chair in the present invention at a third viewing angle, as shown in the figure: In one embodiment, the first limit rail 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 segment TR1 between the first end point F1 and the second end point F2; the second limit rail 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 segment TR2 between the first end point G1 and the second end point G2. In order to allow the extension section 233 to move to the first end of the second extension track 232 and be in a closed state when the joints PA123 and PA223 move to the first end points F1 and G1, and to allow the extension section 233 to move to the second end of the second extension track 232 and be in an extended state when the joints 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, thereby controlling the lengths of the first double-link mechanism PA12 and the second double-link mechanism PA22 by adjusting the distance between the joints PA123 and PA223.

In one embodiment, a connecting rod PA3 is disposed between the first guide plate PA11 and the second guide plate PA21. The configuration of the connecting rod PA3 balances the forces between the first guide plate PA11 and the second guide plate PA21.

Referring to "Figure 5" again, in one embodiment, in order to provide appropriate support for the first bracket unit 22 when the first bracket unit 22 is flipped to the horizontal direction, vertical rods 14A and 14B extending downward from the chair body 10, a diagonal support mechanism 15A whose two ends are respectively pivoted on the lower end of the vertical rod 14A and the first bracket unit 22, and a diagonal support mechanism 15B whose two ends are respectively pivoted on the lower end of the vertical rod 14B and the first bracket unit 22. The shear rigidity of the first bracket unit 22 is increased by the diagonal support mechanisms 15A and 15B, so that the lateral deformation of the structure under the action of horizontal load is reduced. In a further embodiment, the diagonal support mechanisms 15A and 15B can be nitrogen rods, hydraulic rods, or dampers. When the first support unit 22 is retracted, the damper collects energy so that when the first support unit 22 is extended (usually to bear the weight of the patient), the burden on the actuator 21 is reduced.

In summary, the invention can significantly extend the extension length of the footrest through the multi-stage extension footrest, provide support for the entire leg, reduce the pressure on the joints and muscles, and achieve the effect of full leg support. In addition, the structure of the invention allows the extension section to be extended through a mechanical linkage design, without the need to set up another set of actuators for the extension of the secondary section.

The present invention has been described in detail above. However, what is described above is only one of the preferred embodiments of the present invention and should not be used to limit the scope of implementation of the present invention. 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 of the patent of the present invention.

100: Treatment Chair

10: Chair body

11: Base

111: Base

112: Lifting unit

113: Bracket

1131: Bearing unit

1132: Bearing unit

12: Seat

121: Seat unit

122: Armrest unit

123: Backrest unit

124: Headrest unit

13: Pivot

131: Rotating shaft

A1: Arrow

21: Actuator

211:Activity terminal

P1: Axis position

22: First bracket unit

221: First extension track

23: Secondary stretch unit

D1: First end

D2: Second end

231: Second bracket unit

232: Second extension track

233: Extension

P2: Axis position

CA: Groove

PA: Linkage mechanism combination

PA1: First guide mechanism

PA11: First guide plate

PA111: First limit track

F1: First endpoint

F2: Second endpoint

TR1: Arc segment

PA12: The first double connecting rod mechanism

PA121: Connecting rod

PA122: Connecting rod

PA123: Joint

PA2: Second Guidance Mechanism

PA21: Second guide plate

PA211: Second limit rail

G1: First endpoint

G2: Second endpoint

TR2: Arc segment

PA22: Second double connecting rod mechanism

PA221: Connecting rod

PA222: Connecting rod

PA223: Joint

PA3: Connecting rod

14A: Vertical rod

14B: Vertical rod

15A: Inclined support mechanism

15B: Inclined support mechanism

20: Extendable footrest

30: Control device

DT1:Distance

DT2: Distance

FIG1 is a schematic diagram of the appearance of the treatment chair of the present invention.

FIG. 2 is a side view of the first state of the treatment chair of the present invention.

FIG3 is a side view of the second state of the treatment chair of the present invention.

FIG. 4 is a partially enlarged schematic diagram of the second state of the treatment chair of the present invention at a first viewing angle.

FIG. 5 is a partially enlarged schematic diagram of the second state of the treatment chair of the present invention at a second viewing angle.

FIG6 is a partially enlarged schematic diagram of the second state of the treatment chair of the present invention at a third viewing angle.

100: Treatment chair

10: Chair body

111: Base

113: Bracket

1131: Bearing unit

1132: Bearing unit

12: Seats

121: Seat cushion unit

122: Armrest unit

123: Backrest unit

124: Headrest unit

13: Pivot device

131: Rotating axis

20: Extendable footrest device

Claims (10)

A treatment chair with a multi-stage extendable footrest, comprising: a chair body, comprising a base, and a seat arranged on the base, the seat comprising a cushion unit and a backrest unit; and An extendable footrest device is arranged on the cushion unit, and the extendable footrest device includes an actuator fixed on the base or the cushion unit, a first bracket unit pivotally arranged on the cushion unit and having a first extension track, and a secondary extension unit arranged on the first extension track and pivotally connected to the active end of the actuator, wherein the secondary extension unit includes a second bracket unit, a second extension track arranged on the second bracket unit, and an extension section arranged on the second extension track, wherein the extension section is linked to the second bracket unit through a linkage mechanism assembly, so that when the second bracket unit is extended along the first extension track, the extension section is linked to extend along the secondary section of the second extension track. A treatment chair with a multi-stage extendable footrest as described in claim 1, wherein the linkage mechanism assembly includes a first guide mechanism and a second guide mechanism symmetrically arranged on both sides of the first bracket unit, the first guide mechanism includes a first guide plate 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 pivoted on the first side of the second bracket unit, and the other end is pivoted on the extension section, and the joint portion of the first double-link mechanism is movable A first limit rail is arranged on the first guide plate and can slide along the first limit rail. The second guide mechanism includes a second guide plate 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 pivoted on the second side of the second bracket unit, and the other end is pivoted on the extension section. The joint portion of the second double-link mechanism is movably arranged on the second limit rail on the second guide plate and can slide along the second limit rail. A medical chair with a multi-section extendable footrest as described in claim 2, wherein the first limiting rail and the second limiting rail 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 segment between the first end point and the second end point. A treatment chair with a multi-stage extendable footrest as described in claim 2, wherein a connecting rod is provided between the first guide plate and the second guide plate. As described in claim 1, a medical chair with a multi-stage extendable footrest, wherein a vertical rod extending downward from the chair body and a reclining mechanism with two ends pivoted on the lower end of the vertical rod and the first bracket unit are respectively provided on both sides of the chair body. A medical chair with a multi-stage extendable footrest as described in claim 5, wherein the reclining mechanism is a nitrogen rod, a hydraulic rod, or a damper. A treatment chair with a multi-section extendable footrest as described in claim 1, wherein the extension section is provided with a plurality of grooves. A treatment chair with a multi-stage extendable footrest as described in claim 1, wherein the backrest unit is arranged in conjunction with a pivot device and is rotated relative to the seat cushion unit with the rotation axis of the pivot device as the axis. A multi-stage extendable footrest medical chair as described in item 1 of the patent application, wherein the base includes a pedestal, a lifting unit disposed on the pedestal, and a bracket disposed on the lifting unit, and the bracket is provided for the seat cushion unit and the backrest unit. A multi-stage extendable footrest medical chair as described in claim 9, wherein the lifting unit raises or lowers the support according to a control instruction.

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