TWI874281B - Improvement of linkage mechanism of rehabilitation medical chair - Google Patents

Abstract

An improved linkage mechanism of a rehabilitation medical chair is mainly composed of a main frame having two parallel side frames, each of which is provided with an armrest side plate, and at least one main rotating rod is pivotally connected between the two side frames, and at least one telescopic damping driver, a seat frame assembly, a chair back frame assembly, a leg rest frame assembly, and a lifting mechanism assembly are combined between the two armrest side plates, the front and rear sides of the seat frame assembly are respectively connected to the leg rest frame assembly and the chair back frame assembly, and the lifting mechanism assembly is connected to drive the seat frame assembly to rise or fall, wherein the telescopic damping driver is connected and The main rotating rod is driven to rotate, and then the chair back frame assembly is linked to swing through a first swing rod, so that the seat frame assembly, the lifting mechanism assembly, and the leg rest frame assembly simultaneously generate different swinging angles; thereby, when using the rehabilitation medical chair, the chair back frame assembly can be indirectly swung by the telescopic damping drive to adjust the sitting and lying postures of the upper body, as well as the angle and height of the leg rest, and the lifting mechanism assembly, the seat frame assembly, and the leg rest frame assembly can be smoothly linked to ensure the safety and quality of the machine and extend its service life.

Description

Improvement of linkage mechanism of rehabilitation medical chair

The present invention is related to an improvement of the linkage mechanism of a rehabilitation medical chair, especially a chair specially used for rehabilitation medical purposes, and uses multiple linkage components to achieve the effect of adjusting the sitting and lying angles.

According to the invention patent case of the Republic of China "Adjustable Mechanism for Sitting and Lying Angle of Rehabilitation Medical Chair" previously applied by the inventor, certificate number I851311, it is mainly composed of a main frame body with at least one telescopic damping drive, a seat frame assembly, a chair back frame assembly, a leg rest frame assembly, and a lifting mechanism assembly combined between two armrest side panels, wherein the front and rear sides of the seat frame assembly are respectively The leg rest frame assembly and the backrest frame assembly are connected separately, and the telescopic damping drive drives the backrest frame assembly, the seat frame assembly, and the leg rest frame assembly to generate different swinging angles, and the lifting mechanism assembly drives the seat frame assembly to rise or fall; thereby, when using the rehabilitation medical chair, the upper body sitting and lying posture, as well as the angle and height of the leg support can be adjusted. However, the following shortcomings were found after sales:

Please refer to Figures 21 and 22. When the user is of a large body type, and the upper body is usually heavier than the lower body, when the user is adjusted from the lying mode to the sitting mode, the user is too heavy, so that the linkage rod of the chair back frame assembly 40 alone cannot support the user's weight and cannot swing upward. At the same time, the telescopic rod 21 of the telescopic damping driver 20 is driving the main rotating rod 13 to rotate, and at the same time drives the linkage components between the lifting mechanism assembly 60 and the seat frame assembly 30 to be linked to each other. Therefore, the seat frame assembly 30 is restrained by the back frame assembly 40 and cannot move. At the same time, the seat frame assembly 30 must be linked with the lifting mechanism assembly 60, so that the linking member 63 of the lifting mechanism assembly 60, the first linking member 34 of the seat frame assembly 30, and the second linking member 35 are disassembled and disintegrated, causing damage to the machine and danger to the user, and even causing the buyer or consumer to have a poor impression of the quality of the machine.

In view of this, the inventor, based on his many years of experience in manufacturing, developing and designing related products, has designed and carefully evaluated the above-mentioned goals and finally obtained this invention which is truly practical.

In view of the fact that the rehabilitation medical chair previously applied by the inventor has the disadvantage of poor linkage between linkage components and disassembly and disintegration when switching between lying mode and sitting mode due to the incorrect design of the initial force linkage position, when the user is heavier.

The present invention provides an improved linkage mechanism for a rehabilitation medical chair, including: a main frame body, which is placed on the ground and has two parallel corresponding side frames, each of which has a lifting guide plate fixed at the middle position of the inner side of the two side frames, and a rotating caster device is provided at the front and rear ends thereof, and a main rotating rod is hinged between the two side frames, and a first fixed bottom frame and a second fixed bottom frame are fixedly connected, wherein each lifting guide plate is provided with a first elongated groove and a second elongated groove, and two first hinges are fixedly provided at one end of the main rotating rod in a radial direction, and the other end of each first hinge is hinged to one end of a first swinging rod;

A telescopic damping actuator includes at least a telescopic rod and a motor device that can drive the telescopic rod to extend and retract. The motor device is pivotally connected to the first fixed base frame. One end of the telescopic rod is pivotally connected to and drives the main rotating rod to rotate.

A seat frame assembly has two parallel seats, the middle section of each seat frame is pivoted to the front end of a first driven rod, the rear section of the first driven rod is pivoted to one end of a third swing rod, the other end of the third swing rod is pivoted to the inner side of the lifting guide plate, and the rear section of each seat frame is pivoted to one end of a first linking member, the other end of the first linking member is pivoted to one end of a second linking member, the other end of the second linking member is pivoted to the outer side of the lifting guide plate;

A chair back frame assembly is pivoted to the rear side of the seat frame assembly and swings, and generates different swinging angles with the seat frame assembly. It is mainly composed of two connecting parts, one end of which is pivoted to the rear end of each seat frame, and the other end of each connecting part is pivoted to one end of a fourth swing rod, and the other end of the fourth swing rod is pivoted to the rear end of each first driven rod of the seat frame assembly, and the top end of each connecting part is fixedly connected to a back frame upward, and each back frame is pivoted to the other end of each first swing rod at a predetermined position;

A leg rest assembly is pivoted to the front side of the seat frame assembly and swings, and generates different swinging angles with the seat frame assembly. It is mainly composed of two first swinging members respectively pivoted to the front end of each seat frame, a second fixed rod, and one end of a follower. The other end of the follower is pivoted to one end of a second swinging member, and the other end of the second swinging member is pivoted to one end of the second fixed rod. The other end of the second fixed rod is pivoted to one end of a second swinging rod. The other end of the second swinging rod is simultaneously pivoted to the seat frame of the seat frame assembly and the front end of the first follower rod;

A lifting mechanism assembly is provided, wherein one end of a first outer swing rod and one end of a second outer swing rod are pivotally connected at the upper and lower edges of the outer sides of each lifting guide plate, respectively. The other end of the first outer swing rod is pivotally connected to the middle section of a connecting member. The front end of the connecting member is pivotally connected to the second swing rod of the leg support frame assembly, and the rear end of the connecting member is pivotally connected to the other end of the second outer swing rod. At the same time, the link is pivotally connected to the first link of the seat frame assembly. In addition, the middle section of the first outer swing rod and the lower edge of the lifting guide plate are respectively connected to the two ends of a spring, and the inner side of the second outer swing rod is convexly provided with two guide posts, and the two guide posts are respectively moved in the first elongated groove and the second elongated groove of the lifting guide plate;

A foot pedal frame assembly is disposed at the bottom of the main frame and can be moved horizontally out of the front side of the main frame;

The two armrest side panels are respectively arranged on the left and right sides of the main frame, and one end of each armrest side panel is pivoted to the side frame of the main frame so that the armrest side panel can pivot outward horizontally;

The two side panel positioning devices are installed on each side frame and control each armrest side panel to position and close the left and right sides of the main frame;

The two caster positioning devices are respectively arranged at the bottom of each side frame and control the rotation of the rotating caster device of each side frame in a linked manner.

The effects of this invention are:

When using the rehabilitation medical chair, when switching between the lying mode and the sitting mode, the telescopic rod of the telescopic damping driver drives the main rotating rod to rotate, and drives the first swing rod to effectively and directly apply force to push up or pull down the chair back frame assembly, so that the components of the lifting mechanism assembly, the seat frame assembly, and the leg rest frame assembly can be smoothly linked and avoid disassembly and disintegration, thereby ensuring the safety and quality of the machine and extending its service life.

〔Use〕

5: The first long groove

6: Second long groove

11: Lifting guide plate

13: Main lever

131: Ear

16: First swing

18: Second fixed rod

19: Second swing lever

20: Telescopic damping drive

21: Telescopic rod

22: Motor device

30: Seat assembly

31: Seat

32: First follower

33: Third swing

34: First link

35: Second link

40: Seat back frame assembly

41: Connectors

42: Fourth swing

50: Leg rest assembly

51: first swing member

52: Follower

53: Second swing member

60: Lifting mechanism assembly

61: First outside swing

62: Second outside swing

63: Linkage

64: Spring

〔Original Work〕

1: Seat cushion

2: Back cushion

3: First leg cushion

4: Second leg support

10: Main frame

101: Side frame

11: Lifting guide plate

5: The first long groove

6: Second long groove

12: Rotating caster device

13: Main lever

131: Ear

14: First fixed chassis

15: Second fixed base

16: First swing

161: First fixed rod

18: Second fixed rod

19: Second swing lever

20: Telescopic damping drive

21: Telescopic rod

22: Motor device

30: Seat assembly

31: Seat

32: First follower rod

33: Third swing

34: First link

35: Second link

36: Third synchronous connecting rod

40: Seat back frame assembly

41: Connectors

42: Fourth swing

43: Back rack

44: Fourth synchronous connecting rod

45: Fifth synchronous connecting rod

50: Leg rest assembly

51: first swing member

52: Follower

53: Second swing member

60: Lifting mechanism assembly

61: First outside swing

62: Second outside swing

63: Linkage

64: Spring

65: Guide column

70: Foot pedal assembly

71: Pedaling

72: bottom frame

73: Slider

74:Hollow casing

75: Rotating wheel

80: Armrest side panel

81: Storage board

82: Positioning piece

83: Positioning hole

84: Hinge device

90: Side panel positioning device

91: Control Panel

92:Hollow Sliding Tube

93: Positioning pin

100: Caster positioning device

110: Swing pedal

111: Control lever

112: Fifth swing

113: Second follower

114: Rocker

115: Third follower

116:Fourth follower

117: Linkage

Figure 1 is a three-dimensional assembly diagram of the present invention (sitting posture).

Figure 2 is a skeleton assembly diagram from another angle of Figure 1.

Figure 3 is a three-dimensional assembly diagram of the present invention (lying posture).

Figure 4 is a skeleton assembly diagram from another angle of Figure 3.

Figure 5 is another angle view of Figure 4 (removing the two armrest side panels).

Figure 6 is another angle view of Figure 4 (with the two armrest side panels removed).

Figure 7 is a three-dimensional assembly diagram of the seat frame assembly, leg support frame assembly, and chair back frame assembly of the present invention.

Figure 8 is a partial 3D exploded view of Figure 7.

Figure 9 is an external side view (sitting posture) of the seat frame assembly, leg support frame assembly, and chair back frame assembly of the present invention.

Figure 10 is an inside view of the seat frame assembly, leg rest frame assembly, and chair back frame assembly of the present invention (sitting posture).

Figure 11 is a side view of the unfolded leg rest assembly of the present invention.

Figure 12 is an inside view of the unfolded leg rest assembly of the present invention.

Figure 13 is an external side view (lying position) of the seat frame assembly, leg rest frame assembly, and chair back frame assembly of the present invention.

Figure 14 is an inside view (lying position) of the seat frame assembly, leg rest frame assembly, and chair back frame assembly of the present invention.

Figure 15 is a three-dimensional assembly diagram of the foot pedal frame assembly of the present invention.

Figure 16 is a three-dimensional exploded view of the footrest assembly of the present invention.

Figure 17 is a reference diagram of the unfolded storage panel and armrest side panel of the present invention.

Figure 18 is a partially enlarged three-dimensional assembly diagram of the side panel positioning device of the present invention.

Figure 19 is a partially enlarged three-dimensional exploded view of the side panel positioning device of the present invention.

Figure 20 is a schematic diagram of the three-dimensional assembly of the caster positioning device of the present invention.

Figure 21 is an external side view of the seat frame assembly, leg support assembly, and backrest assembly (sitting position).

Figure 22 is an external side view of the seat frame assembly, leg support frame assembly, and backrest frame assembly (lying position).

In order to enable the review committee to have a deeper understanding and knowledge of the purpose, features and effects of this creation, please list the following examples in conjunction with the [Simple Diagram Description] and explain them in detail as follows:

First, as shown in Figures 1 to 20, this invention is an improvement on the linkage mechanism of a rehabilitation medical chair, including:

A main frame 10 is placed on the ground and has two parallel corresponding side frames 101. A lifting guide plate 11 is fixed at the middle position of the inner side of the two side frames 101, and a rotating caster device 12 is provided at the front and rear ends thereof. A main rotating rod 13 is pivoted between the two side frames 101, and a first fixed base frame 14 and a second fixed base frame 15 are fixedly connected. The lifting guide plate 11 is provided with a first elongated groove 5 and a second elongated groove 6. Two first hinges 131 are radially fixed on one end of the main rotating rod 13. The other end of each first hinge 131 is pivoted to one end of a first swing rod 16. At least one first fixed rod 161 is fixedly connected between the two first swing rods 16;

A telescopic damping actuator 20 at least includes a telescopic rod 21 and a motor device 22 that can drive the telescopic rod 21 to extend and retract. The motor device 22 is pivoted to the first fixed base frame 14. One end of the telescopic rod 21 is pivoted to drive the main rotating rod 13 to rotate.

A seat frame assembly 30 has two parallel seats 31, each of which is pivoted at the middle position of a first driven rod 32, and pivoted at the rear position of the first driven rod 32 to one end of a third swing rod 33, and the other end of the third swing rod 33 is pivoted to the inner side of the lifting guide plate 11, and the rear position of each seat frame 31 is pivoted to one end of a first linking member 34, and the other end of the first linking member 34 is pivoted to one end of a second linking member 35, and the other end of the second linking member 35 is pivoted to the outer side of the lifting guide plate 11. In addition, a third synchronous connecting rod 36 is fixedly connected between the two first driven rods 32, and a seat pad 1 is fixedly provided on the two seat frames 31;

A backrest frame assembly 40 is pivoted to the rear side of the seat frame assembly 30 and swings to generate different swing angles with the seat frame assembly 30. It is mainly composed of two connecting members 41, one end of which is pivoted to the rear end of each seat frame 31, and the other end of each connecting member 41 is pivoted to one end of a fourth swing rod 42. The other end of the fourth swing rod 42 is pivoted to each first driven member of the seat frame assembly 30. The rear end of the rod 32, and the top end of each connecting member 41 is respectively fixedly connected to a back frame 43 upward, a fifth synchronous connecting rod 45 is fixedly connected between the two back frames 43, and the fifth synchronous connecting rod 45 is simultaneously pivoted to the other end of the two first swinging rods 16. In addition, a fourth synchronous connecting rod 44 is fixedly connected between the two fourth swinging rods 42, and a backrest pad 2 is fixedly provided on the two back frames 43; a leg The support frame assembly 50 is pivoted to the front side of the seat frame assembly 30 and swings to form different swinging angles with the seat frame assembly 30. It is mainly composed of two first swinging members 51 respectively pivoted to the front end of each seat frame 31, a second fixing rod 18, and one end of a follower 52. The other end of the follower 52 is pivoted to one end of a second swinging member 53. The other end of the second swinging member 53 is pivoted to the front end of the seat frame 31. One end of the second fixed rod 18, the other end of the second fixed rod 18 is pivotally connected to one end of a second swing rod 19, the other end of the second swing rod 19 is pivotally connected to the seat frame 31 of the seat frame assembly 30 and the front end of the first driven rod 32. In addition, one side of the two first swing members 51 is jointly fixed with a first leg rest pad 3, and one side of the two first driven members 52 is jointly fixed with a second leg rest pad 4;

A lifting mechanism assembly 60 is provided, wherein one end of a first outer swing rod 61 and one end of a second outer swing rod 62 are pivotally connected at the upper and lower edges of the outer sides of each lifting guide plate 11, respectively. The other end of the first outer swing rod 61 is pivotally connected to the middle section of a linking member 63. The front end of the linking member 63 is pivotally connected to the second swing rod 19 of the leg support frame assembly 50, and the rear end of the linking member 63 is pivotally connected to the second outer swing rod 62. At the same time, the link 63 pivots the first link 34 of the seat frame assembly 30. In addition, the middle section of the first outer swing rod 61 and the lower edge of the lifting guide plate 11 are respectively connected to the two ends of a spring 64, and the inner side of the second outer swing rod 62 is convexly provided with two guide posts 65, and the two guide posts 65 are respectively moved in the first elongated groove 5 and the second elongated groove 6 of the lifting guide plate 11;

A foot pedal frame assembly 70 is disposed at the bottom of the main frame 10 and can be moved horizontally out of the front side of the main frame 10, wherein the foot pedal frame assembly 70 includes a pedal 71, a base frame 72, at least one slide bar 73, at least one hollow sleeve 74 corresponding to the slide bar 73, and a plurality of rotating wheels 75. The rotating wheel 75 and the base frame 72 are disposed at the bottom of the pedal 71. One side of the base frame 72 is fixedly connected to the slide bar 73, and the hollow sleeve 74 is fixed to the first fixed base frame 14 and is provided for the slide bar 73 to pass through and is provided at the front and rear ends of the hollow sleeve 74. Sliding; two armrest side panels 80 are respectively arranged on the left and right sides of the main frame 10, and one end thereof is pivoted to the rear end of the side frame 101 of the main frame 10 through a hinge device 84, so that the armrest side panel 80 can be horizontally pivoted outward. In addition, a storage plate 81 is pivoted on the outer side of the armrest side panel 80, so that the storage plate 81 can be folded down and parallel to the armrest side panel 80, or can be folded up and perpendicular to the armrest side panel 80, and a positioning member 82 is arranged on the inner side of the armrest side panel 80, and the positioning member 82 has a positioning hole 83;

The two side panel positioning devices 90 are arranged on each of the side frames 101, and control each of the armrest side panels 80 to position and close the left and right sides of the main frame 10, wherein the side panel positioning device 90 at least includes a control panel 91, a hollow slide tube 92, and a positioning pin 93 that are combined with each other. The positioning pin 93 is sleeved inside the hollow slide tube 92. The control panel 91 is connected to the positioning pin 93 and controls the upward and downward movement of the positioning pin 93, so that the positioning pin 93 moves upward and is inserted into the positioning hole 83 on the armrest side panel 80;

The two caster positioning devices 100 are respectively arranged at the bottom of each side frame 101. A linkage rod 117 is connected between the two caster positioning devices 100 to synchronously link and control the rotation of the rotating caster devices 12 of the two side frames 101. The caster positioning device 100 is mainly composed of a swing pedal 110 axially fixed to one end of a control cross rod 111, and the other end of the control cross rod 111 is fixed to a fifth swing rod 112. The other end of the fifth swing rod 112 is pivoted to one end of a second driven rod 113, the other end of the second driven rod 113 is pivoted to a predetermined position of a swing rod 114, the two ends of the swing rod 114 are each pivoted to one end of a third driven rod 115, the other end of the third driven rod 115 is pivoted to one end of a fourth driven rod 116, and the other end of each fourth driven rod 116 is respectively used to control the rotation of the rotating caster device 12 at the front and rear ends of each side frame 101.

Based on the above structure and assembly design, the usage of each main component of the present invention is described as follows:

(I) First, regarding the linkage between the telescopic damping actuator 20, the seat frame assembly 30, the seat back frame assembly 40, and the leg rest frame assembly 50:

1. As shown in Figures 9 and 10, when the user is sitting, it is a normal state. The seat frame assembly 30 (seat cushion 1) and the chair back frame assembly 40 (back cushion 2), and the seat frame assembly 30 (seat cushion 1) and the first swinging member 51 (first leg cushion 3) of the leg rest frame assembly 50 are all at a vertical angle, and the follower 52 (second leg cushion 4) of the leg rest frame assembly 50 is folded inward to the bottom of the seat cushion 1.

2. As shown in Figures 11 and 12, when the user uses the lying position, the telescopic rod 21 of the telescopic damping actuator 20 drives the main rotating rod 13 to rotate, and drives the first swing rod 16 to pull the back frame 43 of the chair back frame assembly 40 downward (at the same time, the second swing rod 19 swings and causes the seat frame assembly 30 (seat cushion 1) to move backward), so that the first swing member 51 (first leg cushion 3) and the follower 52 (second leg cushion 4) rotate and swing upward until the second fixed rod 18 and the second swing member 53 are in a straight line with each other, and the first swing member 51 (first leg cushion 3) and the follower 52 (second leg cushion 4) are unfolded.

3. Subsequently, as shown in FIGS. 13 and 14, the telescopic rod 21 continues to drive the main rotating rod 13 to rotate, and the hinge 131 continues to pull the first swing rod 16 downward, and the seat frame assembly 30 (seat cushion 1) and the leg rest frame assembly 50 (first leg rest cushion 3, second leg rest cushion 4) rise simultaneously; at the same time, the first outer swing rod 61 and the second outer swing rod 62 swing corresponding to the lifting guide plate 11, and the second outer swing rod 61 and the second outer swing rod 62 swing corresponding to the lifting guide plate 11. The guide post 65 of the movable rod 62 moves upward along the first elongated groove 5 and the second elongated groove 6. At the same time, when the seat frame assembly 30 (seat cushion 1) rises, the connecting member 41 pivoted at the rear end of the seat frame 31 can swing backward, allowing the chair back frame assembly 40 (back cushion 2) to tilt further backward, so that the back cushion 2, seat cushion 1, first leg cushion 3, and second leg cushion 4 can be adjusted as a whole to lie flat.

4. Therefore, when the seat frame assembly 30 (seat cushion 1) needs to be lowered or even restored to a sitting position, the telescopic rod 21 of the telescopic damping actuator 20 can be used to reversely drive the main rotating rod 13 to rotate in the opposite direction, and link the above-mentioned components to move in the opposite direction.

(ii) Regarding the use of the armrest side panel 80:

As shown in Figures 17 to 19, since each of the armrest side panels 80 is pivoted with the side frame 101 of the main frame 10 by a hinge device 84, the armrest side panels 80 can be pivoted outward horizontally and opened. In addition, when closing the armrest side panels 80, the control panel 91 of the side panel positioning device 90 can be stepped on, and the positioning pin 93 inside the hollow slide tube 92 can be controlled to move upward and inserted into the positioning hole 83 of the inner positioning member 82 of the armrest side panel 80, so as to position the armrest side panel 80 to prevent the armrest side panel 80 from swinging sideways at will.

(III) Regarding the use of the caster positioning device 100:

1. As shown in Figure 20, when the swing pedal 110 is stepped on, the control crossbar 111 rotates and sequentially links the fifth swing rod 112, the second driven rod 113, and the swing rod 114. The swing rod 114 then sequentially links the third driven rod 115 and the fourth driven rod 116 at both ends, and then the fourth driven rod 116 controls the locking of each rotating caster device 12 so that it does not rotate; when the swing pedal 110 is stepped on again, the rotating caster device 12 can be controlled to be released and can rotate freely.

2. Finally, the two caster positioning devices 100 are synchronously linked via the linkage rod 117, and can simultaneously control the rotation of the four sets of rotating caster devices 12.

(IV) Regarding the use of the foot pedal frame assembly 70:

As shown in Figures 15 and 16, the pedal 71 can be held and pulled outward, so that the two slide bars 73 can slide out synchronously through the hollow sleeves 74; at the same time, with the plurality of rotating wheels 75, the pedal 71 can be moved and pulled out of the front side of the rehabilitation medical chair more smoothly; on the contrary, when the foot pedal frame assembly is not needed, the pedal 71 can be held and pushed back to the bottom of the main frame 10.

The following benefits can be obtained by using the structure of the above specific implementation example:

(I) First, when the user wants to adjust from the lying mode to the sitting mode, the telescopic rod 21 of the telescopic damping actuator 20 drives the main rotating rod 13 to rotate, and drives the first swing rod 16 to effectively and directly apply force to push the back frame 43 upward (PS. The weight of the upper body is greater than the lower body); thereby, when switching between the lying mode and the sitting mode, the components of the lifting mechanism assembly 60, the seat frame assembly 30, and the leg rest frame assembly 50 can be smoothly linked and avoid disassembly and disintegration, thereby ensuring the safety and quality of the machine and extending its service life.

Therefore, in addition to the above-mentioned most important advantages, the present invention also retains the same benefits as the previous application filed by the inventor as follows.

(ii) The rehabilitation medical chair of the present invention can be controlled and adjusted to a sitting mode, a lying mode, and a rising and falling mode after lying down according to the needs of the user, that is,

1. When the user is sitting, it is a normal state. The seat frame assembly 30 (seat cushion 1) and the chair back frame assembly 40 (back cushion 2), and the seat frame assembly 30 (seat cushion 1) and the first swinging member 51 (first leg cushion 3) of the leg cushion assembly 50 are all at a vertical angle, and the follower 52 (second leg cushion 4) is folded inward to the bottom of the seat frame assembly 30 (seat cushion 1).

2. When the user uses the lying position, the chair back frame assembly 40 (back cushion 2) tilts backward, and the first swing member 51 (first leg cushion 3) and the follower member 52 (second leg cushion 4) of the leg cushion assembly 50 are unfolded to the front side of the rehabilitation medical chair, so that the back cushion 2, seat cushion 1, first leg cushion 3, and second leg cushion 4 are adjusted as a whole to lie flat.

Thus, the present invention utilizes the electric telescopic damping drive 20 to integrally connect the actuation adjustment method, thereby achieving the effect of rapid adjustment and providing the convenience of effective use.

(III) The armrest side panel 80 can be pivoted outward horizontally to allow the user to easily move sideways from the side of the rehabilitation medical chair. In addition, when the armrest side panel 80 is closed, the side panel positioning device 90 can be used to position the armrest side panel 80 to prevent the armrest side panel 80 from swinging sideways at will, thereby achieving safety in the use of the armrest side panel 80.

(IV) The armrest side panels 80 on both sides of the rehabilitation medical chair can be folded upward to form the storage panels 81 for placing items; when the user does not need to use the storage panels 81, the armrest side panels 80 can be folded downward to achieve convenience and practicality.

(V) Stepping on the caster positioning device 100 can synchronously control the four sets of rotating caster devices 12 to stop rotating. Stepping on the caster positioning device 100 again can synchronously release the rotating caster device 12, so that the rotating caster device 12 can rotate freely. At the same time, no matter when stepping on the caster positioning device 100 on either side of the rehabilitation medical chair, the four sets of rotating caster devices 12 can be synchronously controlled to achieve practicality and safety.

(VI) When the user uses the rehabilitation medical chair, the footrest frame assembly 70 can be moved and pulled out to the front side of the rehabilitation medical chair for the user to step on, thereby enhancing the added value of the rehabilitation medical chair and making the user feel at home.

In summary, the present invention can effectively solve the shortcomings of knowledge creation and can be easily understood and implemented by ordinary knowledgeable people in the relevant technical field. However, the above is only a preferred embodiment 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 be within the scope of the patent of the present invention.

5: The first long groove

6: Second long groove

11: Lifting guide plate

13: Main rotating rod

131: Ear

16: First swing lever

161: First fixed rod

18: Second fixed rod

19: Second swing lever

20: Telescopic damping drive

21: Telescopic rod

22: Motor device

31: Seat frame

32: First follower rod

33: Third swing

34: First linkage

35: Second linkage

36: Third synchronous connecting rod

41: Connectors

42: Fourth swing

43: Backrest

44: Fourth synchronous connecting rod

45: Fifth synchronous connecting rod

51: First swing member

52: Follower

53: Second swing member

61: First outside swing

62: Second outside swing

63: Linkage

64: Spring

65: Guide column

Claims (9)

An improved linkage mechanism for a rehabilitation medical chair, comprising: A main frame is placed on the ground and has two parallel corresponding side frames. A lifting guide plate is fixed at the middle position of the inner side of each side frame, and a rotating caster device is provided at the front and rear ends of each side frame. A main rotating rod is pivoted between the two side frames, and a first fixed base frame and a second fixed base frame are fixedly connected. Each lifting guide plate is provided with a first elongated groove and a second elongated groove. Two first hinges are radially fixed on one end of the main rotating rod, and the other end of each first hinge is pivoted to one end of a first swinging rod; A telescopic damping actuator includes at least a telescopic rod and a motor device that can drive the telescopic rod to extend and retract. The motor device is pivotally connected to the first fixed base frame. One end of the telescopic rod is pivotally connected to and drives the main rotating rod to rotate. A seat frame assembly has two parallel seats, the middle section of each seat frame is pivoted to the front end of a first driven rod, the rear section of the first driven rod is pivoted to one end of a third swing rod, the other end of the third swing rod is pivoted to the inner side of the lifting guide plate, and the rear section of each seat frame is pivoted to one end of a first linking member, the other end of the first linking member is pivoted to one end of a second linking member, the other end of the second linking member is pivoted to the outer side of the lifting guide plate; A chair back frame assembly is pivoted to the rear side of the seat frame assembly and swings, and generates different swinging angles with the seat frame assembly. It is mainly composed of two connecting parts, one end of which is pivoted to the rear end of each seat frame, and the other end of each connecting part is pivoted to one end of a fourth swing rod, and the other end of the fourth swing rod is pivoted to the rear end of each first driven rod of the seat frame assembly, and the top end of each connecting part is fixedly connected to a back frame upward, and each back frame is pivoted to the other end of each first swing rod at a predetermined position; A leg rest assembly is pivoted to the front side of the seat frame assembly and swings, and generates different swinging angles with the seat frame assembly. It is mainly composed of two first swinging members respectively pivoted to the front end of each seat frame, a second fixed rod, and one end of a follower. The other end of the follower is pivoted to one end of a second swinging member, and the other end of the second swinging member is pivoted to one end of the second fixed rod. The other end of the second fixed rod is pivoted to one end of a second swinging rod. The other end of the second swinging rod is simultaneously pivoted to the seat frame of the seat frame assembly and the front end of the first follower rod; A lifting mechanism assembly is provided, wherein one end of a first outer swing rod and one end of a second outer swing rod are pivotally connected at the upper and lower edges of the outer sides of each lifting guide plate, respectively. The other end of the first outer swing rod is pivotally connected to the middle section of a connecting member. The front end of the connecting member is pivotally connected to the second swing rod of the leg support frame assembly, and the rear end of the connecting member is pivotally connected to the other end of the second outer swing rod. At the same time, the link is pivotally connected to the first link of the seat frame assembly. In addition, the middle section of the first outer swing rod and the lower edge of the lifting guide plate are respectively connected to the two ends of a spring, and the inner side of the second outer swing rod is convexly provided with two guide posts, and the two guide posts are respectively moved in the first elongated groove and the second elongated groove of the lifting guide plate; A foot pedal frame assembly is disposed at the bottom of the main frame and can be moved horizontally out of the front side of the main frame; The two armrest side panels are respectively arranged on the left and right sides of the main frame, and one end of each armrest side panel is pivoted to the side frame of the main frame so that the armrest side panel can pivot outward horizontally; The two side panel positioning devices are installed on each side frame and control each armrest side panel to position and close the left and right sides of the main frame; The two caster positioning devices are respectively arranged at the bottom of each side frame and control the rotation of the rotating caster device of each side frame in a linked manner. According to the improvement of the linkage mechanism of the rehabilitation medical chair described in Item 1 of the patent application scope, there is at least one first fixed rod fixedly connected between the two first swing rods. According to the improvement of the linkage mechanism of the rehabilitation medical chair described in Item 1 of the patent application scope, a fifth synchronous connecting rod is fixedly connected between the two back frames, and the fifth synchronous connecting rod is simultaneously pivotally connected to the other ends of the two first swing rods. According to the improvement of the linkage mechanism of the rehabilitation medical chair described in Item 1 of the patent application, the foot pedal frame assembly includes a pedal, a base frame, at least one slide bar, at least one hollow sleeve corresponding to the slide bar, and a plurality of rotating wheels. The rotating wheel and the base frame are arranged at the bottom of the pedal. One side of the base frame is fixed to the slide bar, and the hollow sleeve is fixed to the first fixed base frame and allows the slide bar to pass through and slide forward and backward. According to the improvement of the linkage mechanism of the rehabilitation medical chair described in Item 1 of the patent application scope, one end of each armrest side panel is connected to each side frame through a hinge device. According to the improvement of the linkage mechanism of the rehabilitation medical chair described in Item 1 of the patent application scope, a storage board is provided on the outer side of the armrest side panel, so that the storage board can be folded down and parallel to the armrest side panel, or can be folded up and perpendicular to the armrest side panel. According to the improvement of the linkage mechanism of the rehabilitation medical chair described in Item 1 of the patent application, a positioning piece is provided on the inner side of the armrest side panel, and the positioning piece has a positioning hole, and the side panel positioning device includes at least a control panel, a hollow slide tube, and a positioning pin that are combined with each other. The positioning pin is sleeved inside the hollow slide tube, and the control panel is connected to the positioning pin and controls the upward and downward movement of the positioning pin, so that the positioning pin moves upward and is inserted into the positioning hole on the armrest side panel. According to the improvement of the linkage mechanism of the rehabilitation medical chair described in Item 1 of the patent application, the caster positioning device is mainly composed of a swing pedal axially fixed to one end of a control crossbar, the other end of the control crossbar is fixed to one end of a fifth swing rod, the other end of the fifth swing rod is pivotally connected to one end of a second driven rod, the other end of the second driven rod is pivotally connected to a predetermined position of a swing rod, the two ends of the swing rod are each pivotally connected to one end of a third driven rod, the other end of the third driven rod is pivotally connected to one end of a fourth driven rod, and the other end of each fourth driven rod controls the rotation of the rotating caster device at the front and rear ends of each side frame. According to the improvement of the linkage mechanism of the rehabilitation medical chair described in Item 1 of the patent application scope, a linkage rod is connected between the two caster positioning devices to synchronously control the rotation of the rotating caster devices of the two side frames.

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