Cane chair with support

Abstract

A cane chair with auxiliary support includes a pivot unit, a support unit, a central column unit, and a load-bearing unit. The pivot unit includes an axis and a through hole. The support unit includes at least three support rods, each having a pivot portion, a top portion, and a bottom portion, the top and bottom portions being convertible between a folded state and an open state. The load-bearing unit includes a slide and a load-bearing assembly. The central column unit includes an upper end and a lower end. When the top and bottom portions are in the open state, the lower end corresponds to the bottom end, and both the top and bottom ends can simultaneously rest against the ground, providing auxiliary support.

Description

Cane chair with support This invention relates to a seating device, and more particularly to a cane chair with auxiliary support. A linkage opening and closing device and a chair having the linkage opening and closing device (disclosed in Republic of China Patent No. I730881) are disclosed, comprising a pivot unit and at least three support units. Each support unit includes a support rod and a stop member, the stop member having two stop surfaces. The support units can switch between a retracted state and an extended state. When one support unit pivots relative to the pivot unit, one of the stop surfaces can push the stop surface of an adjacent support unit, thereby causing the adjacent support unit to pivot and extend. The chair also includes a seating unit, which includes a seating assembly connected to one of the support rods and a linkage assembly. Operating the seating assembly allows the support units to switch between the retracted and extended states. Although the above structure already facilitates easy opening and closing operations, the applicant believes that the overall structural stability can be further improved, leading to the invention of this invention. Therefore, the object of the present invention is to provide a cane chair with auxiliary support that can improve support stability. Therefore, the cane chair with auxiliary support of the present invention includes a pivot unit, a support unit, a central column unit, and a load-bearing unit. The pivot unit includes an axis and a through hole along the axis. The support unit is pivotally connected to the pivot unit and includes at least three support rods that are pivotally rotatable about the axis. Each support rod has a pivot portion pivotally connected to the pivot unit, a top portion located on one side of the pivot portion, and a bottom portion opposite the top portion and located on the other side of the pivot portion. The top portions and bottom portions can be switched between a closed state approaching the axis and an open state away from the axis. The load-bearing unit includes a slide seat slidably fitted onto one of the support rods and a load-bearing assembly pivotally connected to the slide seat. The central column unit is slidably inserted through the perforation and includes an upper end pivotally connected to the bearing assembly and a lower end opposite to the upper end. When the top and bottom ends of the support rods are in the open state, the lower end of the central column unit is positioned corresponding to the bottom ends, and the bottom ends of the support rods and the lower end can simultaneously abut against the ground. The advantages of this invention are as follows: by using the central column unit pivotally connected to the bearing assembly, when the slide of the bearing unit slides along one of the support rods, the central column unit can be activated. When the bottom ends of the support rods are in the open state, the bottom ends of the support rods and the lower end of the central column unit can simultaneously abut against the ground. In addition to achieving stability through multi-point support, the bearing assembly can also be supported. 1: Pivot Unit 11: Top surface 12: Bottom surface 13: Outer perimeter 14: Perforation 15: Limiting hole 16: Pivot 2: Support unit 201: Support rod 21: Pivot section 22: Top part 23: Bottom end 24: Lower pivot section 3: Linkage device 31: Linkage seat 301: Main Body 311: Through-hole 312: Inner circumference 313: Large diameter section 314: Small path section 315: Shoulder 316: Guide trench 317: Inner protrusion 318: Card 302: Pivot 32: Lower Link 4: Central column unit 401: Central column component 41: Upper section 411: Upper end 412: Outer end 413: Ring Ditch 414: Class Kong 415: Expanded section 416: Narrow section 417: Shoulder 418: Guiding Department 410: Guide Block 42: Lower pole section 421: Lower end 422: Inner end 423: Reliance Department 424: Outer Peripheral Surface 425: Outer protrusion 426: Guide sliding part 427: Tooth pattern 428: Landslide 43: Ring 431: Groove 432: Convex point 402: Limiting buckle 403: Trend Components 5: Bearing Unit 51: Slide 52: Bearing group 521: Pivot Ear L: Axis Other features and effects of the present invention will be clearly presented with reference to the embodiments shown in the figures, wherein: Figure 1 is a perspective view of a first embodiment of the cane chair with auxiliary support of the present invention; Figure 2 is a partial enlarged perspective view of Figure 1; Figure 3 is an incomplete exploded perspective view of Figure 1; Figure 4 is a perspective view of a second embodiment of the cane chair with auxiliary support of the present invention; Figure 5 is a partial exploded perspective view of Figure 4; Figure 6 is a front sectional view of the second embodiment; Figure 7 is a sectional view along line VII-VII in Figure 4; Figure 8 is a... Figure 7 is a schematic diagram of an operation; Figure 9 is a perspective view of a third embodiment of the cane chair with auxiliary support of the present invention; Figure 10 is a partial exploded perspective view of Figure 8; Figure 11 is a cross-sectional view along line XI-XI in Figure 9; Figure 12 is a schematic diagram of an operation of Figure 11; Figure 13 is a perspective view of a fourth embodiment of the cane chair with auxiliary support of the present invention; Figure 14 is a partial exploded perspective view of Figure 13; Figure 15 is a front sectional view of the fourth embodiment; Figure 16 is a cross-sectional view along line XVI-XVI in Figure 13; Figure 17 is a schematic diagram of an operation of Figure 16; Figure 18 is a perspective view of a fifth embodiment of the cane chair with auxiliary support of the present invention; Figure 19 is a partial exploded perspective view of Figure 18; Figure 20 is a front sectional view of the fifth embodiment; Figure 21 is a sectional view along line XXI-XXI in Figure 18; Figure 22 is a schematic diagram of an operation of Figure 21; Figure 23 is a perspective view of a sixth embodiment of the cane chair with auxiliary support of the present invention; and Figure 24 is a front sectional view of the sixth embodiment. Before the invention is described in detail, it should be noted that similar elements are represented by the same numbers in the following description. Referring to Figures 1 to 3, a first embodiment of the cane chair with auxiliary support of the present invention includes a pivot unit 1, a support unit 2, a linkage device 3, a central column unit 4, and a load-bearing unit 5. The pivot unit 1 is arranged along an axis L and is in the shape of a short cylinder. The pivot unit 1 includes a top surface 11, a bottom surface 12 arranged opposite to the top surface 11 along the axis L, an outer peripheral surface 13 connecting the periphery of the top surface 11 and the bottom surface 12, a through hole 14 arranged along the axis L, three limiting holes 15 extending from the top surface 11 to the bottom surface 12 and spaced apart around the axis L, and three pivots 16 spaced apart around the axis L and respectively passing through the corresponding limiting holes 15. The number of limiting holes 15 is not limited to three, and may also be four (not shown in the figure). The support unit 2 is pivotally connected to the pivot unit 1 and includes three support rods 201 that are pivotable about the axis L and pass through the limiting holes 15. The number of support rods 201 is not limited to three and may also be four (not shown). Each support rod 201 has a pivot portion 21 pivotally connected to the corresponding pivot 16, a top portion 22 located on one side of the pivot portion 21 and disposed above the top surface 11, a bottom portion 23 opposite to the top portion 22 and located on the other side of the pivot portion 21, and a lower pivot portion 24 disposed between the pivot portion 21 and the bottom portion 23. Each pivot portion 21 can pivot in the corresponding limiting hole 15. The top portions 22 and the bottom portions 23 can switch between a closed state approaching the axis L (not shown) and an open state away from the axis L (see the state in Figure 1). The linkage device 3 includes a linkage seat 31 and three lower connecting rods 32. The linkage seat 31 is located between the support rods 201 and has a hollow annular main body 301 and three pivot members 302 surrounding the axis L and connected to the main body 301. The main body 301 has an inner annular surface 312 that defines a through hole 311 and is formed around the axis L. Each of the lower connecting rods 32 is pivotally connected at opposite ends to the corresponding pivot member 302 and the lower pivot portion 24 of the support rod 201. The central column unit 4 includes a single rod-shaped, slidable central column 401 passing through the through hole 14, and two limiting rings 402 fastened to the central column 401. The central column 401 extends along the axis L and has an upper end 411, a lower end 421 opposite to the upper end 411, and two spaced-apart annular grooves 413. The limiting rings 402 are respectively fastened in the annular grooves 413, allowing the linkage seat 31 to rotate relative to the central column 401 but confined between the limiting rings 402. The support unit 5 includes a slide block 51 slidably sleeved on one of the support rods 201, and a support assembly 52 pivotally connected to the slide block 51. The support assembly 52 has a lug 521 provided on the bottom surface 12, and the upper end 411 is pivotally connected to the lug 521 of the support assembly 52. To further understand the effects of the combination of the various components of the present invention, the technical means employed, and the expected results, the following explanation will be provided, which will hopefully lead to a deeper and more specific understanding of the present invention. When switching the support rods 201 between the retracted and extended states, and operating the slide block 51 to slide along the fitted support rods 201, the slide block 51 first pulls the bearing assembly 52, which in turn causes the central column unit 4 to slide up and down relative to the pivot unit 1. The support rods 201 can also pivot relative to the pivot unit 1. Furthermore, the pivoting action of the support rods 201 will then cause the lower connecting rods 32 to rotate, and the rotation of the lower connecting rods 32 will then cause the connecting seat 31 to rotate relative to the central column 401 (see Figures 1 and 2). As shown in Figure 1, when the support rods 201 move from the retracted state to the extended state, the top ends 22 can collectively define a larger bearing surface when the support rods 201 are extended, and can be used to support the bearing assembly 52. Simultaneously, when the bottom ends 23 of the support rods 201 are in the extended state, the lower end 421 of the central column unit 4 corresponds to the bottom ends 23, and the bottom ends 23 and 421 of the support rods 201 can simultaneously abut against the ground. This creates a multi-point contact positioning effect between the cane chair and the ground, and the central column unit 4 also provides auxiliary support for the load-bearing assembly 52. ​​This provides a more stable and safer experience for the occupant. As shown in Figures 4 to 6, a second embodiment of the cane chair with auxiliary support of the present invention also includes a pivot unit 1, a support unit 2, a linkage device 3, a central column unit 4, and a load-bearing unit 5. The following description focuses only on the parts that differ from the first embodiment. The inner annular surface 312 of the linkage 31 is stepped, wider at the top and narrower at the bottom, and has a large diameter section 313, a small diameter section 314, and a shoulder 315 at the junction of the large diameter section 313 and the small diameter section 314. The large diameter section 313 has a guide groove 316. The small diameter section 314 has a plurality of inward protrusions 317 spaced apart around the axis L and protruding toward the axis L. The central column unit 4 includes a central column member 401 and a trend member 403 mounted on the central column member 401. The central column 401 has an upper rod section 41 and a lower rod section 42 that are connected in an inner and outer manner. The upper rod section 41 has an upper end portion 411, an outer end portion 412 opposite to the upper end portion 411 and abutting against the shoulder portion 315, and a stepped hole 414 recessed from the outer end portion 412 toward the upper end portion 411 and wider at the top and narrower at the bottom. The stepped hole 414 is defined by an enlarged hole section 415, a narrow hole section 416, and a shoulder surface 417 located at the junction of the enlarged hole section 415 and the narrow hole section 416. The enlarged hole section 415 has two guide portions 418 parallel to the axis L and in the shape of grooves, and a guide block 410 protruding from the outer end portion 412. By using the guide block 410 nested in the guide groove 316, the linkage seat 31 can rotate relative to the central column 401 but cannot move relative to the central column 401 along the axis L, and the linkage seat 31 is rotatably connected to the outer end portion 412. The lower rod segment 42 has a lower end portion 421, an inner end portion 422 opposite to the lower end portion 421 and slidable but non-rotatable, passing through the interior of the upper rod segment 41, an abutment portion 423 between the lower end portion 421 and the inner end portion 422, an outer peripheral surface 424 extending from the lower end portion 421 to the inner end portion 422, and a plurality of outwardly protruding portions 425 protruding from the outer peripheral surface 424 and extending from the inner end portion 422 toward the lower end portion 421. The inner end portion 422 has two guide portions 426 that are complementary in shape to the guide portions 418 and can be interlocked, allowing the lower rod segment 42 to slidably but non-rotatably pass through the interior of the upper rod segment 41. In this embodiment, the guide slide 426 can be an elastic claw (or a compression spring, not shown). The guide slide 426 utilizes its elastic deformability and automatic spring-back function. When the guide slide 426 is inserted into the narrow section 416 of the stepped hole 414, it can be locked onto the shoulder surface 417, preventing the lower rod section 42 from easily detaching from the upper rod section 41. The protrusions 425 are spaced apart around the axis L, and each protrusion 425 has a rough surface. The trending element 403 employs a compression spring and springs back between the upper rod section 41 and the lower rod section 42. The trending element 403 is positioned with its opposite ends abutting between the top of the stepped hole 414 and the inner end 422. The spring force of the trending element 403 provides a tendency for the inner end 422 of the lower rod section 42 to move outward toward the outer end 412 of the upper rod section 41, and the spring force of the trending element 403 provides the lower end 421 to abut against the ground. As shown in Figures 6, 7, and 8, when the entire assembly is completed and the support rods 201 switch between a retracted state and an extended state, the connecting seat 31 can rotate relative to the upper rod segment 41 around the axis L via the lower connecting rods 32 (as indicated by the arrow in Figure 7). When the connecting seat 31 rotates, the inner protrusions 317 engage with the outer protrusions 425 of the lower rod segment 42, allowing the connecting seat 31 to engage with the lower rod segment 42. The rough surface of the outer protrusions 425 enhances the engagement effect between the inner protrusions 317 and the outer protrusions 425 of the lower rod segment 42. Therefore, by utilizing the overall structure of the second embodiment of the present invention, the same purpose and effect as the first embodiment can also be achieved. As shown in Figures 9 and 10, a third embodiment of the cane chair with auxiliary support of the present invention is similar to the second embodiment, and the difference from the second embodiment is that each of the outer protrusions 425 of the lower rod segment 42 of the central column unit 4 has a plurality of teeth 427 arranged at intervals along the axis L. By using the arrangement of such teeth 427, the locking effect between such inner protrusions 317 and the outer protrusions 425 of the lower rod segment 42 can be increased. As shown in Figures 11 and 12, when the support rods 201 switch between a retracted state and an extended state, the connecting seat 31 can rotate relative to the upper rod segment 41 around the axis L via the lower connecting rods 32 (as indicated by the arrows). Furthermore, when the connecting seat 31 rotates, the inner protrusions 317 engage with the outer protrusions 425 of the lower rod segment 42. Therefore, by utilizing the overall structure of the third embodiment of the present invention, the same purpose and effects as the second embodiment can be achieved. As shown in Figures 13 to 15, a fourth embodiment of the cane chair with auxiliary support of the present invention includes a pivot unit 1, a support unit 2, a linkage device 3, a central column unit 4, and a load-bearing unit 5. The central column 401 has an upper rod section 41, a lower rod section 42, and a ring 43 disposed between the linkage unit 31 and the lower rod section 42. The linkage seat 31 has a structure that is substantially the same as that of the linkage seat 31 in the second embodiment. The inner ring surface 312 has a guide groove 316 and a plurality of inner protrusions 317 that are spaced apart around the axis L and protrude toward the axis L. The upper rod section 41 and the lower rod section 42 have roughly the same structure as the corresponding components in the second embodiment, and will not be described further. The ring 43 has a plurality of grooves 431 and a plurality of protrusions 432 disposed on the outer ring surface. As shown in Figures 15, 16 and 17, when the lower connecting rod 32 drives the connecting seat 31 to rotate around the axis L relative to the upper rod segment 41, the inner protrusions 317 of the connecting seat 31 press against the protrusions 432, and the ring 43 binds the lower rod segment 42. The connecting seat 31, the ring 43 and the lower rod segment 42 are mutually locked together. Therefore, by utilizing the overall structure of the fourth embodiment of the present invention, the same objectives and effects as those of the embodiments described above can also be achieved. As shown in Figures 18 to 20, a fifth embodiment of the cane chair with auxiliary support of the present invention includes a pivot unit 1, a support unit 2, a linkage device 3, a central column unit 4, and a load-bearing unit 5. The linkage 31 has a plurality of cards 318 arranged at intervals around the axis L. The central column 401 has an upper rod section 41, a lower rod section 42, and a ring 43 fixed to the top of the lower rod section 42. The lower rod section 42 has a plurality of grooves 428 parallel to the axis L for the card 318 to be nested. The ring 43 can slide inside the upper rod section 41 but does not rotate, and has a plurality of grooves 431 and a plurality of protrusions 432 provided on the inner ring surface. By utilizing the interlocking of the cards 318 and the grooves 428, the linkage seat 31 can slide relative to the lower rod segment 42 but does not rotate. The linkage seat 31 can rotate relative to the upper rod segment 41 but does not slide. As shown in Figures 21 and 22, when the lower connecting rod 32 drives the connecting seat 31 and the lower rod segment 42 to rotate around the axis L relative to the upper rod segment 41, the protruding parts 425 of the lower rod segment 42 press against the protrusions 432 and open the ring 43, and the connecting seat 31, the ring 43 and the upper rod segment 41 are mutually locked. Therefore, by utilizing the overall structure of the fifth embodiment of the present invention, the same objectives and effects as those of the embodiments described above can also be achieved. As shown in Figures 23 and 24, a sixth embodiment of the cane chair with auxiliary support of the present invention includes a pivot unit 1, a support unit 2, a linkage device 3, a central column unit 4, and a load-bearing unit 5. The central column unit 4 includes a central column member 401 in the shape of a single rod, and a guide member 403 mounted on the central column member 401. The elasticity of the guide member 403 provides that the lower end 421 abuts against the ground. The guide member 403 of the central column unit 4 is sleeved on the outside of the central column member 401, and the guide member 403 is located between the pivot unit 1 and the linkage seat 31. Therefore, by utilizing the overall structure of the sixth embodiment of the present invention, the same purpose and effect as the first embodiment can be achieved. Furthermore, the elasticity of the trend member 403 allows the support unit 2 to quickly complete its expanded state. It is worth mentioning that the second to fifth embodiments of the present invention are all provided with the trending member 403. However, if the trending member 403 is omitted, the lower rod segment 42 can also slide relative to the upper rod segment 41 by utilizing its own weight (not shown in the figure). In summary, the cane chair with auxiliary support of the present invention has a simple overall structure, is easy to manufacture and assemble, can achieve stability with multi-point support, and the load-bearing assembly 52 can also be supported, thus achieving the purpose of the present invention. However, the above description is merely an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the patent specification shall still fall within the scope of the patent of the present invention. 1: Pivot Unit 2: Support unit 201: Support rod 21: Pivot section 22: Top part 23: Bottom end 24: Lower pivot section 3: Linkage device 31: Linkage seat 32: Lower Link 4: Central column unit 401: Central column component 411: Upper end 421: Lower end 5: Bearing Unit 51: Slide 52: Bearing group 521: Pivot Ear

Claims

1. A cane chair with auxiliary support includes: a pivot unit including an axis, a through hole along the axis, and at least three spaced-apart limiting holes surrounding the through hole; a support unit pivotally connected to the pivot unit and including at least three support rods pivotable about the axis and respectively passing through the limiting holes, each support rod having a pivot portion pivotally connected to the pivot unit, a top portion located on one side of the pivot portion, and a bottom portion opposite to the top portion and located on the other side of the pivot portion, the top portion and the bottom portion being convertible between a closed state approaching the axis and an open state away from the axis; and a linkage device including a linkage seat and at least three lower links, the linkage seat being located between the support rods, each lower link having opposite ends pivotally connected to the linkage seat and the corresponding support rod, respectively. A support unit includes a slide block slidably fitted onto one of the support rods, and a support assembly pivotally connected to the slide block; and a central column unit slidably passing through the through hole and the linkage seat, the central column unit including an upper end pivotally connected to the support assembly, and a lower end opposite to the upper end, wherein... When the top and bottom ends of the support rods are in the open state, the lower end of the central column unit is positioned corresponding to the bottom ends, and the bottom and lower ends of the support rods can simultaneously abut against the ground. The cane chair with auxiliary support as described in claim 1, wherein... The linkage seat of the linkage device is positioned relative to the central column unit along the axis. When the support rods switch between the retracted state and the extended state, the linkage seat can be rotated around the axis relative to the central column unit through the lower connecting rods. As described in claim 1, the cane chair with auxiliary support includes a central column unit and a trending member mounted on the central column, the upper end and the lower end being disposed on the central column, and the elasticity of the trending member providing the lower end with abutment against the ground. The cane chair with auxiliary support as described in claim 3, wherein... The central column of the central column unit extends along the axis and has an upper rod section and a lower rod section that are connected in an inner and outer manner. The trending member springs against the upper rod section and the lower rod section. The upper end is disposed on the upper rod section and the lower end is disposed on the lower rod section. The upper rod section also has an outer end opposite to the upper end. The lower rod section also has an inner end that is slidable but not rotatable and passes through the interior of the upper rod section. The elasticity of the trending member provides a tendency for the inner end of the lower rod section to move outward toward the outer end of the upper rod section. The cane chair with auxiliary support as described in claim 4, wherein... The lower rod section of the central column unit has an outer peripheral surface and a plurality of protrusions extending from the inner end toward the lower end on the outer peripheral surface. Each protrusion has a rough surface. The linkage seat is rotatably connected to the outer end. The linkage seat has a plurality of inner protrusions. When the support rods switch between the retracted state and the extended state, the linkage seat can be rotated relative to the upper rod section around the axis through the lower linkages. The inner protrusions of the linkage seat are engaged with the outer protrusions of the lower rod section, and the linkage seat is linked to the lower rod section. The cane chair with auxiliary support as described in claim 5, wherein... Each outward protrusion of the lower rod section of the central column unit has a plurality of teeth arranged at intervals along the axis. The cane chair with auxiliary support as described in claim 5, wherein... The upper rod section of the central column unit has a stepped hole that is wider at the top and narrower at the bottom. The stepped hole is defined by an enlarged hole section, a narrow hole section, and a shoulder surface located at the junction of the enlarged hole section and the narrow hole section. The enlarged hole section has at least one guide portion parallel to the axis. The inner end of the lower rod section has a guide sliding portion that is complementary to the guide portion and can be interlocked with it, so that the lower rod section can slide but not rotate through the interior of the upper rod section. The cane chair with auxiliary support as described in claim 4, wherein... The central column unit also includes a ring sleeve disposed between the connecting seat and the lower rod segment. The connecting seat has a plurality of inner protrusions, the ring sleeve has a plurality of grooves, and a plurality of protrusions. When the lower connecting rods drive the connecting seat to rotate around the axis relative to the upper rod segment, the inner protrusions of the connecting seat press against the protrusions and cause the ring sleeve to bind the lower rod segment. The connecting seat, the ring sleeve, and the lower rod segment interlock with each other. The cane chair with auxiliary support as described in claim 8, wherein... The upper rod section of the central column unit has a stepped hole that is wider at the top and narrower at the bottom. The stepped hole is defined by an enlarged hole section, a narrow hole section, and a shoulder surface located at the junction of the enlarged hole section and the narrow hole section. The enlarged hole section has at least one guide portion parallel to the axis. The inner end of the lower rod section has a guide sliding portion that is complementary to the guide portion and can be interlocked with it, so that the lower rod section can slide but not rotate through the interior of the upper rod section. The cane chair with auxiliary support as described in claim 3, wherein... The central column unit also includes a ring fixed to the top of the lower rod segment. The lower rod segment has a plurality of protrusions at the top. The ring can slide inside the upper rod segment but does not rotate. It has a plurality of grooves and a plurality of protrusions. The linkage seat can rotate relative to the upper rod segment but does not slide. When the lower linkage drives the linkage seat and the lower rod segment to rotate relative to the upper rod segment around the axis, the protrusions of the lower rod segment press against the protrusions and open the ring. The linkage seat, the ring, and the upper rod segment are mutually locked. The cane chair with auxiliary support as described in claim 10, wherein... The upper rod section of the central column unit has a stepped hole that is wider at the top and narrower at the bottom. The stepped hole is defined by an enlarged hole section, a narrow hole section, and a shoulder surface located at the junction of the enlarged hole section and the narrow hole section. The enlarged hole section has at least one guide portion parallel to the axis. The ring sleeve also has a guide sliding portion that is concave and convex with the guide portion and can be interlocked with it, so that the ring sleeve and the lower rod section can slide but not rotate through the interior of the upper rod section. As described in claim 3, the cane chair with auxiliary support has a trend member sleeved outside the central column unit, and the trend member is located between the pivot unit and the linkage seat.

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