Auxiliary chair

Abstract

The utility model provides an auxiliary chair. The auxiliary chair comprises a chair body, at least one quick release structure and at least one positioning support structure, the quick release structure is connected to the chair body. The positioning support structure is connected to the quick release structure and comprises at least two connecting rods, two first joint modules and a second joint module. The two first joint modules are connected to the two ends of the first connecting rod respectively, each first joint module is provided with a first rotation axis, and the two first rotation axes are parallel to each other. The second joint module is connected to one end, far away from the first connecting rod, of the second connecting rod and is provided with a second rotation axis, and the second rotation axis is orthogonal to each first rotation axis. When the quick release structure is operated, the positioning support structure is allowed to integrally rotate relative to the chair body or be separated from the chair body, so that the use convenience is improved.

Description

Technical Field

[0001] The utility model relates to an auxiliary chair, in particular to an auxiliary chair with a positioning support structure. Background Art

[0002] Due to physical limitations, people with disabilities must use assistive chairs, such as wheelchairs. These typically include a backrest and armrests for support. However, for those who cannot maintain their own sitting balance, such as those with scoliosis, additional support structures are required on the backrest or seat. These structures can be adjusted to suit the user's posture and provide support.

[0003] However, when the user wants to leave the auxiliary chair, these positioning support structures may cause obstruction, resulting in inconvenience in use, so there is still room for improvement. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an auxiliary chair, which can achieve convenience in use through its structural configuration.

[0005] According to one embodiment of the present invention, an auxiliary chair is provided, comprising:

[0006] Chair body;

[0007] at least one quick release structure connected to the chair body; and

[0008] At least one positioning support structure connected to the at least one quick release structure and comprising:

[0009] at least two connecting rods, the at least two connecting rods being arranged in series;

[0010] Two first joint modules are respectively connected to two ends of a first one of the at least two connecting rods, each of the first joint modules has a first rotation axis, and the first rotation axes of the two first joint modules are parallel to each other; and

[0011] A second joint module is connected to an end of a second one of the at least two links away from the first one and has a second rotation axis, the second rotation axis being orthogonal to each of the first rotation axes;

[0012] When adjusting the at least one positioning support structure, each of the first joint modules is switched from a limited position state to an adjustment state, allowing the first of the at least two connecting rods to rotate; and the at least one quick release structure is operated to allow the at least one positioning support structure to rotate relative to the chair body as a whole or to detach from the chair body. According to the auxiliary chair of the aforementioned embodiment, the at least one quick release structure includes:

[0013] A first fixing seat connected to the chair body and comprising two protruding arms spaced apart from each other;

[0014] a pivot hole penetrating through one of the two protruding arms along a first penetrating direction, wherein the first penetrating direction is parallel to each of the first rotation axes;

[0015] a limiting pin hole penetrating the other of the two protruding arms along the first penetrating direction;

[0016] a positioning pin, inserted into the at least one positioning support structure and assembled on the first fixing seat, the positioning pin comprising a pressure-bearing end and a limiting end, the pressure-bearing end being accommodated in the pivot hole, the limiting end corresponding to the limiting pin hole, and the limiting end having a shape that matches the shape of the limiting pin hole; and

[0017] A first elastic member is sleeved on the pressure-bearing end;

[0018] Among them, after the pressure-bearing end is pressed by external force, it pushes the limiting end to separate from the at least one positioning support structure and causes the first elastic member to store force, allowing the at least one positioning support structure to rotate relative to the first fixed seat. When the external force is removed, the first elastic member resets the pressure-bearing end, and the limiting end returns to the at least one positioning support structure to limit the rotation of the at least one positioning support structure.

[0019] According to the auxiliary chair of the aforementioned embodiment, the at least one positioning support structure further comprises:

[0020] providing a rod connecting one of the two first joint modules;

[0021] Wherein, the positioning pin of the at least one quick release structure is inserted into the setting rod. According to the auxiliary chair of the aforementioned embodiment, the at least one quick release structure includes:

[0022] a second fixing seat connected to the chair body;

[0023] a slot penetrating the second fixing seat along a second penetrating direction, wherein the second penetrating direction is parallel to the second rotation axis;

[0024] a positioning groove, disposed on the second fixing seat and communicating with the slot, wherein a positioning axis of the positioning groove is orthogonal to the second penetrating direction;

[0025] A second elastic member is received in the positioning groove; and

[0026] The push ball is pushed by the second elastic member to push against the at least one positioning support structure.

[0027] According to the auxiliary chair of the aforementioned embodiment, the number of the at least two connecting rods is greater than or equal to three, the second, the first, and the third of the plurality of connecting rods are arranged in sequence, and the at least one positioning support structure further includes:

[0028] a third joint module connecting the third of the plurality of links; and

[0029] The setting rod is connected to the third joint module and is used to be inserted into the slot. The setting rod includes a positioning recess corresponding to the top bead of the at least one quick release structure.

[0030] According to another embodiment of the present invention, an auxiliary chair is provided, comprising:

[0031] Chair body;

[0032] at least one quick release structure connected to the chair body;

[0033] At least one positioning support structure connected to the at least one quick release structure and comprising:

[0034] At least two connecting rods, the at least two connecting rods are arranged in series and have a series direction;

[0035] Two first joint modules, respectively connected to two ends of a first one of the at least two connecting rods in the serial connection direction, each of the first joint modules having a first rotation axis, the first rotation axes of the two first joint modules being parallel to each other, and each of the first joint modules including two first face gears meshing with each other; and

[0036] a second joint module connected to one end of a second one of the at least two links and having a second rotation axis, the second rotation axis being orthogonal to each of the first rotation axes and parallel to the serial connection direction;

[0037] When adjusting the at least one positioning support structure, each of the first joint modules is switched from a limited position state to an adjustment state, allowing the first of the at least two connecting rods to rotate; and the at least one quick release structure is operated to allow the at least one positioning support structure to rotate relative to the chair body as a whole or to detach from the chair body. According to the auxiliary chair of the aforementioned embodiment, the at least one quick release structure includes:

[0038] A first fixing seat connected to the chair body and comprising two protruding arms spaced apart from each other;

[0039] a pivot hole penetrating one of the two protruding arms along a first penetrating direction, wherein the first penetrating direction is parallel to the first rotation axis;

[0040] a limiting pin hole penetrating the other of the two protruding arms along the first penetrating direction;

[0041] a positioning pin, inserted into the at least one positioning support structure and assembled on the first fixing seat, the positioning pin comprising a pressure-bearing end and a limiting end, the pressure-bearing end being accommodated in the pivot hole, the limiting end corresponding to the limiting pin hole, and the limiting end having a shape that matches the shape of the limiting pin hole; and

[0042] A first elastic member is sleeved on the pressure-bearing end;

[0043] The pressure-receiving end, when pressed by an external force, pushes the limiting end away from the at least one positioning support structure and causes the first elastic member to accumulate force, allowing the at least one positioning support structure to rotate relative to the first fixed seat. When the external force is removed, the first elastic member resets the pressure-receiving end, and the limiting end returns to the at least one positioning support structure to limit the rotation of the at least one positioning support structure. According to the auxiliary chair of the aforementioned embodiment, the at least one positioning support structure further includes:

[0044] providing a rod connecting one of the two first joint modules;

[0045] Wherein, the positioning pin of the at least one quick release structure is inserted into the setting rod. According to the auxiliary chair of the aforementioned embodiment, the at least one quick release structure includes:

[0046] a second fixing seat connected to the chair body;

[0047] a slot penetrating the second fixing seat along a second penetrating direction, wherein the second penetrating direction is parallel to the second rotation axis;

[0048] a positioning groove, disposed on the second fixing seat and communicating with the slot, wherein a positioning axis of the positioning groove is orthogonal to the second penetrating direction;

[0049] A second elastic member is received in the positioning groove; and

[0050] The top ball is pushed by the second elastic member to push against the at least one positioning support structure. According to the auxiliary chair of the aforementioned embodiment, the number of the at least two connecting rods is greater than or equal to three, and the second, the first, and the third of the plurality of connecting rods are arranged in sequence, and the at least one positioning support structure further includes:

[0051] a third joint module connecting the third of the plurality of links; and

[0052] The setting rod is connected to the third joint module and is used to be inserted into the slot. The setting rod includes a positioning recess corresponding to the top bead of the at least one quick release structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A partial three-dimensional schematic diagram of an auxiliary chair according to the present invention is shown;

[0054] Figure 2 Draw Figure 1 A three-dimensional schematic diagram of a positioning support structure and a quick release structure of an auxiliary chair according to an embodiment;

[0055] Figure 3 Draw Figure 2An exploded schematic diagram of the positioning support structure and the quick release structure of the embodiment;

[0056] Figure 4 Draw Figure 2 A schematic cross-sectional view of the positioning support structure of the embodiment along section line 4-4;

[0057] Figure 5 Draw Figure 2 A schematic cross-sectional view of the positioning support structure and the quick release structure of the embodiment along section line 5-5;

[0058] Figure 6 Draw Figure 1 A three-dimensional schematic diagram of another positioning support structure and another quick release structure of the auxiliary chair of the embodiment;

[0059] Figure 7 Draw Figure 6 An exploded schematic diagram of the positioning support structure and the quick release structure of the embodiment;

[0060] Figure 8 Draw Figure 6 A schematic cross-sectional view of the positioning support structure and the quick release structure of the embodiment along section line 8-8;

[0061] Figure 9 Draw Figure 1 A partial perspective schematic diagram of an auxiliary chair according to an embodiment;

[0062] Figure 10 Draw Figure 1 A three-dimensional schematic diagram of another positioning support structure and another quick release structure of the auxiliary chair of the embodiment; and

[0063] Figure 11 Draw Figure 1 Another partial perspective schematic diagram of the auxiliary chair of the embodiment.

[0064] Reference numerals:

[0065] 1000: Chair body

[0066] 1100: Chair back

[0067] 1200: Armrest

[0068] 1300: Sit on the board

[0069] 2000, 3000, 4000, 5000, 6000: Positioning support structure

[0070] 2000a, 3000a, 4000a, 5000a, 6000a: Quick release structure

[0071] 2100a: first fixed seat

[0072] 2110,2120,3110,3120,3130,4110,4120,5110,5120,5130,5140,5150,6110,6120,6130: Connecting rod

[0073] 2110a, 2120a: protruding arm

[0074] 2111, 2121: first fitting hole

[0075] 2130a: Locking portion

[0076] 2200a: pivot hole

[0077] 2300,2400,3300,3400,4300,4400,5300,5400,6300,6400: First joint module

[0078] 2300a: Limit pin hole

[0079] 2310, 2320, 2410, 2420: First gear

[0080] 2311, 2321: first face tooth portion

[0081] 2312, 2322: first engaging protrusion

[0082] 2330,2430:First spring

[0083] 2340,2440: first screw

[0084] 2400a: Positioning pin

[0085] 2410a: Pressure end

[0086] 2420a:Limit end

[0087] 2500, 3500, 4500, 5500, 6500: Second joint module

[0088] 2500a: first elastic member

[0089] 2510,2520: Second gear

[0090] 2530: Second spring

[0091] 2540: Second screw

[0092] 2600,3600,4600,5600,6600: Setting rod

[0093] 2600a: Cap

[0094] 2700,3700,4700: support plate

[0095] 3100a: Second fixing seat

[0096] 3200a: slot

[0097] 3300a: Positioning groove

[0098] 3400a: Top bead

[0099] 3500a: second elastic member

[0100] 3600a:Block

[0101] 3610: Positioning concave

[0102] 3900,5900,6900: Third joint module

[0103] 3910,3920: Third gear

[0104] 3930: Third spring

[0105] 3940: Third screw

[0106] 5200,6200: Fourth joint module

[0107] 5700: Headrest

[0108] 5800,6800:Fifth joint module

[0109] 6140,6150: Adapter rod

[0110] 6700:Foot support

[0111] X11, X12: First rotation axis

[0112] X 2: Second axis of rotation DETAILED DESCRIPTION

[0113] The following describes embodiments of the present invention with reference to the accompanying drawings. For clarity, many practical details will be included in the following description. However, the reader should understand that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some known and commonly used structures and components are depicted in simplified schematic form; and repeated components may be represented using the same or similar numbers.

[0114] Furthermore, terms such as "first," "second," and "third" are used herein to describe different components or elements, and do not limit the components / elements themselves. Therefore, a "first component / element" may also be referred to as a "second component / element." Furthermore, the combinations of components / elements / mechanisms / modules herein are not generally known, conventional, or known in the art. The known nature of the components / elements / mechanisms / modules themselves cannot be used to determine whether their combinations are easily accomplished by one of ordinary skill in the art.

[0115] See also Figure 1 、 Figure 2 and Figure 3 ,in Figure 1 A partial three-dimensional schematic diagram of an auxiliary chair according to the present invention is shown. Figure 2 Draw Figure 1 A three-dimensional schematic diagram of a positioning support structure 2000 and a quick release structure 2000a of an auxiliary chair in an embodiment, Figure 3 Draw Figure 2 Exploded view of the positioning support structure 2000 and quick release structure 2000a of an embodiment. The auxiliary chair (not shown) includes a chair body 1000, at least one quick release structure 2000a, 3000a, 4000a, 5000a, 6000a, and at least one positioning support structure 2000, 3000, 4000, 5000, 6000. In this embodiment, eight positioning support structures 2000, 3000, 4000, 5000, 6000 and eight quick release structures 2000a, 3000a, 4000a, 5000a, 6000a may be included, wherein the number of positioning support structures 2000, 3000, and 4000 is two, and the number of positioning support structures 5000 and 6000 is one, but this is not limiting.

[0116] The eight quick release structures 2000a, 3000a, 4000a, 5000a, and 6000a are connected to the chair body 1000. The eight positioning support structures 2000, 3000, 4000, 5000, and 6000 are respectively connected to the eight quick release structures 2000a, 3000a, 4000a, 5000a, and 6000a. Each positioning support structure 2000, 3000, 4000, 5000, and 6000 includes at least two connecting rods 2110, 2120, and 3110 (marked on Figure 6 )、3120(marked on Figure 6 )、3130(marked on Figure 6 )、4110(marked on Figure 9 )、4120(marked on Figure 9 )、5110(marked on Figure 10 )、5120(marked on Figure 10)、5130(marked on Figure 10 )、5140(marked on Figure 10 )、5150(marked on Figure 10 )、6110(marked on Figure 11 )、6120(marked on Figure 11 )、6130(marked on Figure 11 ), two first joint modules 2300, 2400, 3300 (marked on Figure 6 ), 3400 (marked on Figure 6 ), 4300 (marked on Figure 9 ), 4400 (marked on Figure 9 ), 5300 (marked on Figure 10 ), 5400 (marked on Figure 10 )、6300(marked on Figure 11 )、6400(marked on Figure 11 ) and the second joint modules 2500, 3500 (marked on Figure 6 ), 4500(marked on Figure 9 ), 5500(marked on Figure 10 ), 6500 (marked on Figure 11 The at least two connecting rods 2110, 2120, 3110, 3120, 3130, 4110, 4120, 5110, 5120, 5130, 5140, 5150, 6110, 6120, and 6130 are arranged in series. The two first joint modules 2300, 2400, 3300, 3400, 4300, 4400, 5300, 5400, 6300, 6400 are respectively connected to the two ends of the first of the at least two connecting rods 2110, 2120, 3110, 3120, 3130, 4110, 4120, 5110, 5120, 5130, 5140, 5150, 6110, 6120, 6130, the first joint modules 2300, 3300, 4300, 5300, 6300 have a first rotation axis X11, the first joint modules 2400, 3400, 4400, 5400, 6400 have another first rotation axis X12, and the two first rotation axes X11 and X12 are parallel to each other. The second joint modules 2500, 3500, 4500, 5500, 6500 are connected to the end of the second one of the at least two links 2110, 2120, 3110, 3120, 3130, 4110, 4120, 5110, 5120, 5130, 5140, 5150, 6110, 6120, 6130 away from the first one and have a second rotation axis X2, which is orthogonal to the first rotation axes X11 and X12.

[0117] When adjusting the positioning support structure 2000, 3000, 4000, 5000, 6000, each first joint module 2300, 2400, 3300, 3400, 4300, 4400, 5300, 5400, 6300, 6400 is switched from the limit state to the adjustment state, allowing the aforementioned at least two connecting rods 2110, 2120, 3110, 3120, 3130, 4110 , the first one among 4120, 5110, 5120, 5130, 5140, 5150, 6110, 6120, 6130 rotates relative to each other; operate the quick release structure 2000a, 3000a, 4000a, 5000a, 6000a to allow the positioning support structure 2000, 3000, 4000, 5000, 6000 to rotate as a whole relative to the chair body 1000 or detach from the chair body 1000.

[0118] Thus, the positioning support structures 2000, 3000, 4000, 5000, 6000 can be rotated relative to the chair body 1000 or separated from the chair body 1000 through the quick release structures 2000a, 3000a, 4000a, 5000a, 6000a, so that the user can leave the auxiliary chair easily.

[0119] The assistive chair of this invention may have a wheelchair structure and thus may further include a base frame and at least three wheels. The chair body 1000 is mounted on the base frame, and the number of wheels may be, for example, four and mounted on the base frame. For the sake of simplicity, the base frame and wheels are omitted in this invention, but this does not limit the invention. Furthermore, in other embodiments, the assistive chair may also be a conventional chair and include legs, without limitation.

[0120] The chair body 1000 may include a chair back 1100, armrests 1200, and a seat 1300. The armrests 1200 are connected to the chair back 1100, and the seat 1300 is also connected to the chair back 1100.

[0121] Two positioning support structures 2000 can be positioned on either side of the chair back 1100, with each positioning support structure 2000 positioned higher than the armrests 1200. When a user sits on the seat 1300, the positioning support structures 2000 support the sides of the user's upper body and can be adjusted to change the user's position. The positioning support structures 2000 can also be used in conjunction with a quick-release structure 2000a to achieve a release or detachment effect.

[0122] like Figure 2As shown, the positioning support structure 2000 has two connecting rods 2110 and 2120. The two connecting rods 2110 and 2120 do not pivot relative to each other, resulting in a straight line connection between the connecting rods 2110 and 2120. The connecting rods 2110 are rod-shaped and have a connecting direction perpendicular to the first rotation axes X11 and X12. The two first joint modules 2300 and 2400 are respectively connected to the connecting rod 2110 (the first of the connecting rods 2110 and 2120) at both ends of the connecting direction.

[0123] See also Figure 4 , and see also Figures 1 to 3 ,in Figure 4 Draw Figure 2 A schematic cross-sectional view of the positioning support structure 2000 along section line 4-4 of the embodiment. Figure 3 and Figure 4 As shown, each first joint module 2300, 2400 includes two first face gears 2310, 2320, 2410, 2420 that mesh with each other, and the two first face gears 2310, 2320 of the first joint module 2300 are respectively disposed on the connecting rod 2110 and the connecting rod 2120. Specifically, the first face gear 2310 includes a first face gear portion 2311 and three first interlocking protrusions 2312. The first face gear portion 2311 faces the connecting rod 2120, and the first interlocking protrusions 2312 face the connecting rod 2110. The connecting rod 2110 may include three first interlocking holes 2111 at one end. By interlocking the first interlocking protrusions 2312 with the first interlocking holes 2111, the first face gear 2310 and the connecting rod 2110 can be rotationally limited. Similarly, the first face gear 2320 includes a first face tooth portion 2321 and three first engaging protrusions 2322, and the connecting rod 2120 may include three first engaging holes 2121 located at one end thereof. By engaging the first engaging protrusions 2322 with the first engaging holes 2121, the first face gear 2320 and the connecting rod 2120 can be rotationally limited.

[0124] The first joint module 2300 may further include a first spring 2330 and a first screw 2340. The connecting rod 2120 may further include a spring hole (not shown) and a screw hole (not shown). The screw hole is connected to the spring hole, and the first spring 2330 can be accommodated in the spring hole. The first screw 2340 can sequentially pass through the center hole of the first spring 2330, the screw hole, the gear hole of the first face gear 2320, and the gear hole of the first face gear 2310, and then lock into the connecting rod 2110. In this way, when the first screw 2340 is tightened, the first face gear 2320 and the first face gear 2310 can stably engage each other, so that the connecting rods 2110 and 2120 cannot rotate relative to each other and are in a restricted state. On the contrary, when the first screw 2340 is loosened, a gap is generated between the first face gear 2310 and the first face gear 2320 , which is now in an adjustment state. The connecting rod 2110 and the connecting rod 2120 can be rotated to a desired angle and then the first screw 2340 can be tightened.

[0125] The positioning support structure 2000 may further include a support plate 2700. The structure of the second joint module 2500 is similar to that of the first joint module 2300, and therefore includes two second face gears 2510 and 2520, a second spring 2530, and a second screw 2540. The first of the connecting rods 2110 and 2120 is the connecting rod 2120. The second face gear 2510 is rotatably restrained to the connecting rod 2120, and the second face gear 2520 is rotatably restrained to the support plate 2700. The second screw 2540 locks the connecting rod 2120 and the support plate 2700. Specifically, the two ends of the connecting rod 2120 have different shapes. One end is a circular tubular end (i.e., the end away from the connecting rod 2110), and the axis of the circular tubular end is parallel to the connection direction of the connecting rod 2120. The other end is a plate-shaped end, including a flat surface facing the connecting rod 2110, and the plate-shaped end is used to connect to the first face gear 2320. Therefore, the second rotation axis X2 of the second joint module 2500 may be orthogonal to the first rotation axes X11 and X12 and parallel to the serial connection direction.

[0126] The positioning support structure 2000 may further include a setting rod 2600 connected to the first joint module 2400. The two ends of the setting rod 2600 have different shapes. One end is a shaft end, and the axis of the shaft end is orthogonal to the serial connection direction of the setting rod 2600, that is, parallel to the first rotation axes X11 and X12. The other end is a plate end, and the plate end includes a flat surface facing the connecting rod 2110. The first joint module 2400 also includes two first face gears 2410 and 2420, a first spring 2430, and a first screw 2440. The first face gear 2410 is rotationally limited to the connecting rod 2110, and the first face gear 2420 is rotationally limited to the plate end of the setting rod 2600. The first screw 2440 can lock the connecting rod 2110 and the setting rod 2600.

[0127] See also Figure 5, and see also Figures 1 to 4 ,in Figure 5 Draw Figure 2 A schematic cross-sectional view of the positioning support structure 2000 and quick release structure 2000a along section line 5-5 of an embodiment. The quick release structure 2000a may include a first fixing seat 2100a, a pivot hole 2200a, a stop pin hole 2300a, a positioning pin 2400a, and a first elastic member 2500a. The first fixing seat 2100a is connected to the chair body 1000 and includes two spaced-apart protruding arms 2110a and 2120a. The pivot hole 2200a extends through one of the two protruding arms 2110a and 2120a along a first penetration direction (not shown), which is parallel to the first rotation axes X11 and X12. The stop pin hole 2300a extends through the other of the two protruding arms 2110a and 2120a along the first penetration direction. The positioning pin 2400a is inserted into the setting rod 2600 of the positioning support structure 2000 and assembled to the first fixed seat 2100a. The positioning pin 2400a includes a pressure-receiving end 2410a and a limiting end 2420a. The pressure-receiving end 2410a is received in the pivot hole 2200a, while the limiting end 2420a corresponds to the limiting pin hole 2300a, and the shape of the limiting end 2420a matches the shape of the limiting pin hole 2300a. The first elastic member 2500a is sleeved on the pressure-receiving end 2410a. Among them, after the pressure end 2410a is pressed by external force, it pushes the limiting end 2420a to separate from the positioning support structure 2000 and causes the first elastic member 2500a to store force, allowing the positioning support structure 2000 to rotate relative to the first fixed seat 2100a. When the external force is removed, the first elastic member 2500a resets the pressure end 2410a, and the limiting end 2420a returns to the positioning support structure 2000 to limit the rotation of the positioning support structure 2000.

[0128] Specifically, the first fixing base 2100a may include a locking portion 2130a. Projecting arms 2110a and 2120a protrude from one end of the locking portion 2130a. The space between the two projecting arms 2110a and 2120a allows for insertion of the shaft end of the setting rod 2600. A pivot hole 2200a is located within the projecting arm 2110a. The pivot hole 2200a includes a first section and a second section. The diameter of the first section is larger than the diameter of the second section. The first elastic member 2500a may be located within the first section, with one end of the first elastic member 2500a abutting against the step surface between the first and second sections.

[0129] The diameter of the pressure-bearing end 2410a is slightly smaller than the diameter of the second section of the pivot hole 2200a, allowing it to pass through the second section and then into the first section, where it can be enclosed by the first elastic member 2500a. The limiting end 2420a and the limiting pin hole 2300a are both square in shape, so they are rotationally restricted. In other words, the limiting end 2420a cannot rotate relative to the limiting pin hole 2300a. When the positioning pin 2400a passes from the limiting pin hole 2300a toward the pivot hole 2200a, the positioning pin 2400a sequentially passes through the limiting pin hole 2300a, the shaft end of the setting rod 2600, and the pivot hole 2200a, thereby connecting the setting rod 2600 to the first fixing base 2100a. Furthermore, the hole at the end of the shaft tube of the setting rod 2600 may include a rotation prevention section and a pivot section. The rotation prevention section is adjacent to the limit pin hole 2300a and its shape is also matched with the limit end 2420a, so that when the limit pin hole 2300a is located in the rotation prevention section, the positioning pin 2400a and the setting rod 2600 can be rotationally limited.

[0130] The quick release structure 2000a may further include a cap 2600a and a locking member (not shown). The diameter of the cap 2600a is smaller than the diameter of the first section and can cover the pressure-receiving end 2410a. The cap 2600a accommodates the other end of the first elastic member 2500a, and the locking member locks the pressure-receiving end 2410a and the cap 2600a.

[0131] like Figure 5 As shown, the quick-release structure 2000a is not operated, the limiting end 2420a of the positioning pin 2400a is located within the anti-rotation section, and the setting rod 2600 cannot rotate relative to the first fixing seat 2100a. Therefore, the positioning support structure 2000 is in a fixed state, stably supporting the user. Conversely, to release the positioning support structure 2000, the user can press the cap 2600a to move the positioning pin 2400a in the first through-direction, disengaging the anti-rotation section. This frees the setting rod 2600 from the restraint of the positioning pin 2400a and allows it to rotate freely. Therefore, the positioning support structure 2000 can be pushed to change its position without hindering the user's movement, providing convenience. When the user releases the cap 2600a, the first elastic member 2500a resets the positioning pin 2400a, returning the positioning support structure 2000 to its fixed state.

[0132] See also Figure 6 、 Figure 7 and Figure 8 , and see also Figure 1 ,in Figure 6 Draw Figure 1 A three-dimensional schematic diagram of another positioning support structure 3000 and another quick release structure 3000a of the auxiliary chair of the embodiment, Figure 7 Draw Figure 6An exploded view of the positioning support structure 3000 and the quick release structure 3000a of the embodiment, Figure 8 Draw Figure 6 A schematic cross-sectional view of the positioning support structure 3000 and quick release structure 3000a along section line 8-8 of an embodiment. The two positioning support structures 3000 are disposed on either side of the seat plate 1300. The two first joint modules 3300, 3400, the second joint module 3500, and the support plate 3700 of the positioning support structure 3000 are similar to the two first joint modules 2300, 2400, the second joint module 2500, and the support plate 2700 of the positioning support structure 2000. However, the number of connecting rods 3110, 3120, and 3130 in the positioning support structure 3000 is three, and the connecting rods 3120, 3110, and 3130 (the third connecting rod) are arranged in order from top to bottom. The positioning support structure 3000 further includes a third joint module 3900 and a setting rod 3600. The third joint module 3900 is connected to the connecting rod 3130 , and the setting rod 3600 is connected to the third joint module 3900 .

[0133] Specifically, the structure of connecting rod 3130 is similar to that of connecting rod 3110, and connecting rod 3130 and connecting rod 3110 are connected to each other via the first joint module 3400. The two ends of the setting rod 3600 are shaped differently, with one end comprising a convex end and the other a rod end. Setting rod 3600 may further include a positioning recess 3610 located at the rod end, with the convex end locked to connecting rod 3130 via the third joint module 3900. More specifically, the structure of the third joint module 3900 is similar to that of the first joint module 3300, including two third face gears 3910 and 3920, a third spring 3930, and a third screw 3940. The third face gear 3910 is mounted on the connecting rod 3130, the third face gear 3920 is mounted on the setting rod 3600, and the third screw 3940 locks the connecting rod 3130 and the setting rod 3600.

[0134] The quick-release structure 3000a may include a second fixing seat 3100a, a slot 3200a, a positioning groove 3300a, a second elastic member 3500a, and a top bead 3400a. The second fixing seat 3100a is connected to the chair body 1000. The slot 3200a extends through the second fixing seat 3100a along a second through-direction parallel to the second rotation axis X2. The positioning groove 3300a is disposed in the second fixing seat 3100a and communicates with the slot 3200a. The positioning axis (not shown) of the positioning groove 3300a is orthogonal to the second through-direction. The second elastic member 3500a is accommodated in the positioning groove 3300a. The top bead 3400a is pushed against the swing support structure 3000 by the second elastic member 3500a. The rod end of the setting rod 3600 can be used to be inserted into the slot 3200 a , the positioning recess 3610 of the setting rod 3600 can correspond to the top bead 3400 a , and the positioning recess 3610 can be a tapered hole.

[0135] like Figure 7 and Figure 8 As shown, the second fixing base 3100a may include a main body (not shown) and a protrusion (not shown). The protrusion is integrally connected to the side of the main body. The slot 3200a extends through the main body, and the positioning groove 3300a extends from the protrusion toward the main body to connect to the slot 3200a. The shape of the slot 3200a corresponds to the shape of the rod end of the setting rod 3600 and can be rotated to the rod end. The side of the positioning groove 3300a adjacent to the slot 3200a may include a stopper (not shown) to prevent the top ball 3400a from falling into the slot 3200a. The quick release structure 3000a may further include a stopper 3600a. After the top bead 3400a and the second elastic member 3500a are placed in the positioning groove 3300a, the stopper 3600a may be locked into the positioning groove 3300a to prevent the top bead 3400a and the second elastic member 3500a from being separated.

[0136] Since the positioning recess 3610 is a tapered hole, Figure 8 The middle cross-section is triangular and includes a push surface. When the user wants to remove the positioning support structure 3000, he can apply a certain force to move the positioning support structure 3000 toward Figure 8 At this time, the push surface below the top bead 3400a pushes the top bead 3400a, so that the top bead 3400a pushes the second elastic member 3500a along Figure 8 By compressing in the left direction (along the positioning axis), the top ball 3400a disengages the positioning recess 3610, allowing the positioning support structure 3000 to be withdrawn. Conversely, when the positioning support structure 3000 is to be repositioned, the rod end of the setting rod 3600 can be inserted into the slot 3200a, causing the guide groove (not shown) to gradually guide the top ball 3400a inward, and finally reengage it in the positioning recess 3610. It is particularly noted that the number of positioning recesses 3610 and the guide groove can be two, and they can be symmetrically arranged on both sides of the rod end. In this way, the setting rod 3600 can be inserted in both directions to increase ease of use, but this is not limited to this.

[0137] See also Figure 9 , and see also Figure 1 ,in Figure 9 Draw Figure 1A partial three-dimensional schematic diagram of the auxiliary chair of the embodiment. Two positioning support structures 4000 are respectively arranged on both sides of the seat plate 1300, and the positioning support structure 4000 and the positioning support structure 3000 on the same side are arranged at intervals. The two connecting rods 4110, 4120, the first joint modules 4300, 4400, the second joint module 4500, the setting rod 4600 and the support plate 4700 of the positioning support structure 4000 are similar to the two connecting rods 2110, 2120, the first joint modules 2300, 2400, the second joint module 2500, the setting rod 2600 and the support plate 2700 of the positioning support structure 2000, and the quick release structure 4000a is similar to the quick release structure 2000a, and the details are not repeated. However, the only difference is that the shape and length of the first fixing seat (not marked) of the quick release structure 4000a are slightly different from the shape and length of the quick release structure 2000a.

[0138] See also Figure 10 , and see also Figure 1 ,in Figure 10 Draw Figure 1 A perspective diagram of another positioning support structure 5000 and another quick release structure 5000a of an auxiliary chair according to an embodiment. The positioning support structure 5000 is disposed at the upper end of the chair back 1100. The two first joint modules 5300, 5400, the second joint module 5500, the setting rod 5600, and the third joint module 5900 of the positioning support structure 5000 are similar to the two first joint modules 3300, 3400, the second joint module 3500, the setting rod 3600, and the third joint module 3900 of the positioning support structure 3000. The quick release structure 5000a is similar to the quick release structure 3000a, and the details are not repeated here. However, the difference is that the positioning support structure 5000 further includes a headrest 5700, a fourth joint module 5200, and a fifth joint module 5800, and the number of connecting rods 5110, 5120, 5130, 5140, and 5150 is five. The connecting rods 5130, 5110, 5140, 5150, and 5120 are arranged in order (from bottom to top) starting from the setting rod 5600. The connecting rod 5110 is connected to the connecting rod 5140 via the first joint module 5300. The connecting rod 5140 is connected to the connecting rod 5150 via the fourth joint module 5200. The connecting rod 5150 is connected to the connecting rod 5120 via the fifth joint module 5800. The connecting rod 5120 is connected to the headrest 5700 via the second joint module 5500. The fourth rotation axis of the fourth joint module 5200 is orthogonal to the first rotation axis and the second rotation axis X2. The fifth rotation axis of the fifth joint module 5800 is parallel to the first rotation axis. This allows the headrest 5700 to rotate forward and backward and swing left and right.

[0139] See also Figure 11 , and see also Figure 1 , Figure 11 Draw Figure 1 A perspective diagram of another positioning support structure 6000 and another quick-release structure 6000a of an auxiliary chair according to an embodiment. The positioning support structure 6000 is disposed on one side of the seat 1300, near the end of the seat 1300. The two first joint modules 6300 and 6400 and the second joint module 6500 of the positioning support structure 6000 are similar to the two first joint modules 2300 and 2400 and the second joint module 2500 of the positioning support structure 2000. The quick-release structure 6000a is similar to the quick-release structure 2000a, and details are not repeated here. However, the number of links 6110, 6120, and 6130 in the positioning support structure 6000 is three, and the positioning support structure 6000 further includes two adapter rods 6140 and 6150, a setting rod 6600, a third joint module 6900, a fourth joint module 6200, a fifth joint module 6800, and a foot support 6700. The three links 6110, 6120, and 6130 are, starting with the setting rod 6600, link 6130, link 6110, and link 6120. The connecting rod 6130 is connected to the setting rod 6600 through the third joint module 6900, the connecting rod 6110 is connected to the connecting rod 6120 and the connecting rod 6130 respectively through the first joint modules 6300 and 6400, the connecting rod 6120 is connected to the transfer rod 6140 through the second joint module 6500, the transfer rod 6140 is connected to the transfer rod 6150 through the fourth joint module 6200, and the transfer rod 6150 is further connected to the foot support 6700 through the fifth joint module 6800. The fourth rotation axis of the fourth joint module 6200 and the fifth rotation axis of the fifth joint module 6800 can be parallel to the second rotation axis X2.

[0140] As can be seen from the above embodiments, the positioning support structure of the present invention can be installed anywhere on the assistive chair and can include various components, such as a support plate, headrest, and footrest, to support different parts of the user. It also features joint modules and connecting rods for angle adjustment, with the number of connecting rods varying depending on the user's needs. Furthermore, it can be combined with components such as adapter rods to achieve a wider range of angle adjustments. Furthermore, a quick-release mechanism allows the positioning support structure to be removed or released without the need for tools, allowing it to be rotated to a position that does not obstruct the user's path, making it convenient to use.

[0141] Although the present invention has been disclosed above with reference to the embodiments, they are not intended to limit the present invention. Anyone skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An auxiliary chair, characterized in that: Include: Chair body; at least one quick release structure connected to the chair body; and At least one positioning support structure connected to the at least one quick release structure and comprising: at least two connecting rods, the at least two connecting rods being arranged in series; Two first joint modules are respectively connected to two ends of a first one of the at least two connecting rods, each of the first joint modules has a first rotation axis, and the first rotation axes of the two first joint modules are parallel to each other; and A second joint module is connected to an end of a second one of the at least two links away from the first one and has a second rotation axis, the second rotation axis being orthogonal to each of the first rotation axes; When adjusting the at least one positioning support structure, each of the first joint modules is switched from a limiting state to an adjustment state, allowing the first of the at least two connecting rods to rotate; and operating the at least one quick release structure allows the at least one positioning support structure to rotate relative to the chair body as a whole or to detach from the chair body.

2. The auxiliary chair according to claim 1, wherein: The at least one quick release structure comprises: A first fixing seat connected to the chair body and comprising two protruding arms spaced apart from each other; a pivot hole penetrating through one of the two protruding arms along a first penetrating direction, wherein the first penetrating direction is parallel to each of the first rotation axes; a limiting pin hole penetrating the other of the two protruding arms along the first penetrating direction; a positioning pin, inserted into the at least one positioning support structure and assembled on the first fixing seat, the positioning pin comprising a pressure-bearing end and a limiting end, the pressure-bearing end being accommodated in the pivot hole, the limiting end corresponding to the limiting pin hole, and the shape of the limiting end matching the shape of the limiting pin hole; as well as A first elastic member is sleeved on the pressure-bearing end; Among them, after the pressure-bearing end is pressed by external force, it pushes the limiting end to separate from the at least one positioning support structure and causes the first elastic member to store force, allowing the at least one positioning support structure to rotate relative to the first fixed seat. When the external force is removed, the first elastic member resets the pressure-bearing end, and the limiting end returns to the at least one positioning support structure to limit the rotation of the at least one positioning support structure.

3. The auxiliary chair according to claim 2, wherein: The at least one positioning support structure further comprises: providing a rod connecting one of the two first joint modules; Wherein, the positioning pin of the at least one quick release structure is inserted into the setting rod.

4. The auxiliary chair according to claim 1, wherein: The at least one quick release structure comprises: a second fixing seat connected to the chair body; a slot penetrating the second fixing seat along a second penetrating direction, wherein the second penetrating direction is parallel to the second rotation axis; a positioning groove, disposed on the second fixing seat and communicating with the slot, wherein a positioning axis of the positioning groove is orthogonal to the second penetrating direction; A second elastic member is received in the positioning groove; and The push ball is pushed by the second elastic member to push against the at least one positioning support structure.

5. The auxiliary chair according to claim 4, characterized in that The number of the at least two connecting rods is greater than or equal to three, the second, the first, and the third of the plurality of connecting rods are arranged in sequence, and the at least one positioning support structure further comprises: a third joint module connecting the third of the plurality of links; and The setting rod is connected to the third joint module and is used to be inserted into the slot. The setting rod includes a positioning recess corresponding to the top bead of the at least one quick release structure.

6. An auxiliary chair, characterized in that: Include: Chair body; at least one quick release structure connected to the chair body; At least one positioning support structure connected to the at least one quick release structure and comprising: At least two connecting rods, the at least two connecting rods are arranged in series and have a series direction; Two first joint modules, respectively connected to two ends of a first one of the at least two connecting rods in a serial connection direction, each of the first joint modules having a first rotation axis, the first rotation axes of the two first joint modules being parallel to each other, and each of the first joint modules including two first face gears meshing with each other; and a second joint module connected to one end of a second one of the at least two links and having a second rotation axis, the second rotation axis being orthogonal to each of the first rotation axes and parallel to the serial connection direction; When adjusting the at least one positioning support structure, each of the first joint modules is switched from a limiting state to an adjustment state, allowing the first of the at least two connecting rods to rotate; and operating the at least one quick release structure allows the at least one positioning support structure to rotate relative to the chair body as a whole or to detach from the chair body.

7. The auxiliary chair according to claim 6, wherein: The at least one quick release structure comprises: A first fixing seat connected to the chair body and comprising two protruding arms spaced apart from each other; a pivot hole penetrating one of the two protruding arms along a first penetrating direction, wherein the first penetrating direction is parallel to the first rotation axis; a limiting pin hole penetrating the other of the two protruding arms along the first penetrating direction; a positioning pin, inserted into the at least one positioning support structure and assembled on the first fixing seat, the positioning pin comprising a pressure-bearing end and a limiting end, the pressure-bearing end being accommodated in the pivot hole, the limiting end corresponding to the limiting pin hole, and the shape of the limiting end matching the shape of the limiting pin hole; as well as A first elastic member is sleeved on the pressure-bearing end; Among them, after the pressure-bearing end is pressed by external force, it pushes the limiting end to separate from the at least one positioning support structure and causes the first elastic member to store force, allowing the at least one positioning support structure to rotate relative to the first fixed seat. When the external force is removed, the first elastic member resets the pressure-bearing end, and the limiting end returns to the at least one positioning support structure to limit the rotation of the at least one positioning support structure.

8. The auxiliary chair according to claim 7, wherein: The at least one positioning support structure further comprises: providing a rod connecting one of the two first joint modules; Wherein, the positioning pin of the at least one quick release structure is inserted into the setting rod.

9. The auxiliary chair according to claim 6, wherein: The at least one quick release structure comprises: a second fixing seat connected to the chair body; a slot penetrating the second fixing seat along a second penetrating direction, wherein the second penetrating direction is parallel to the second rotation axis; a positioning groove, disposed on the second fixing seat and communicating with the slot, wherein a positioning axis of the positioning groove is orthogonal to the second penetrating direction; A second elastic member is received in the positioning groove; and The push ball is pushed by the second elastic member to push against the at least one positioning support structure.

10. The auxiliary chair according to claim 9, wherein: The number of the at least two connecting rods is greater than or equal to three, the second, the first, and the third of the plurality of connecting rods are arranged in sequence, and the at least one positioning support structure further comprises: a third joint module connecting the third of the plurality of links; and The setting rod is connected to the third joint module and is used to be inserted into the slot. The setting rod includes a positioning recess corresponding to the top bead of the at least one quick release structure.

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