Seat with rotatable armrests and electrically powered wheelchair

Abstract

This application provides a seat with rotatable armrests and an electric wheelchair, enabling an electric wheelchair that facilitates side seating for the elderly. The seat with rotatable armrests includes a body and armrests. The armrests include a support member, a connector, and a rotating mechanism. The connector connects the support member and the rotating mechanism at both ends. The rotating mechanism includes a locking member and a rotating member. The locking member is fixed to the body and has a first locking portion facing the rotating member. The rotating member has a second locking portion facing the locking member, corresponding to the first locking portion. The connector drives the rotating member to rotate, and the rotating member moves axially along the rotating member to engage or disengage the first and second locking portions. The electric wheelchair includes a body, wheels, and a seat with rotatable armrests as described in the first aspect.

Description

Technical Field

[0001] This utility model relates to the field of transportation, and in particular to a seat with rotatable armrests and an electric wheelchair. Background Technology

[0002] Traditional chairs typically have armrests, which restrict seating to the front. Current chairs often feature rotating armrests for easier seating. However, even with rotating armrests, the seating space remains limited, making it difficult for the elderly or those with mobility issues. Completely removing the armrests from electric wheelchairs would reduce comfort and safety. Therefore, current technology lacks an electric wheelchair that combines armrests with ample seating space. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a seat with rotatable armrests and an electric wheelchair, so as to realize an electric wheelchair that makes it convenient for the elderly to sit from the side of the seat.

[0004] To this end, in one aspect, an embodiment provides a seat with a rotatable armrest, including a body and an armrest. The armrest includes a support member, a connector, and a rotating mechanism. The two ends of the connector are respectively connected to the support member and the rotating mechanism. The rotating mechanism includes a locking member and a rotating member. The locking member is fixed to the body, and the locking member has a first locking portion facing the rotating member. The rotating member has a second locking portion facing the locking member, corresponding to the first locking portion. The connector is used to drive the rotating member to rotate, and the rotating member moves along the axial direction of the rotating member to engage or disengage the first locking portion and the second locking portion.

[0005] As a further alternative to the seat with the rotatable armrest, the first locking part is a pin hole, so the second locking part is a pin that mates with the pin hole; or, the first locking part is a pin, so the second locking part is a pin hole that mates with the pin.

[0006] As a further alternative to the seat with the rotatable armrest, the number of the first locking part and the second locking part is not less than two, and the first locking part and the second locking part are arranged circumferentially along the rotation axis of the rotating member.

[0007] As a further alternative to the seat with the rotatable armrest, the rotating mechanism further includes a first elastic element and a fastener. The rotating element has a fixing position corresponding to the fastener. The connecting element has a stepped hole. The fastener passes through the stepped hole and is connected to the fixing position. The first elastic element passes through the fastener and its two ends abut against the edge of the stepped hole and the end of the fastener away from the rotating element, respectively.

[0008] As a further alternative to the seat with the rotatable armrest, a linkage assembly is also included. The linkage assembly includes a driving member and a driven member. The middle part of the driving member is rotatably connected to the support member. The rotatable member is provided with a first guide surface. Driving the driving member moves the driven member. When one end of the driven member moves on the first guide surface, the rotatable member moves.

[0009] As a further alternative to the seat with the rotatable armrest, the rotatable element is also provided with a groove in which at least a portion of the driven element is restricted to move.

[0010] As a further alternative to the seat with the rotatable armrest, a second elastic member is also included, with its two ends connected to the driven member and the connecting member, respectively.

[0011] As a further alternative to the seat with the rotatable armrest, the driven member has a second guide surface at one end near the rotating member, and the second guide surface is provided corresponding to the first guide surface.

[0012] As a further alternative to the seat with the rotatable armrest, the rotatable element includes an interconnected bottom surface and sidewalls, the sidewalls having notches for inserting the driven element.

[0013] Secondly, this embodiment also provides an electric wheelchair, including a body, wheels, and a seat with rotatable armrests as described in the first aspect.

[0014] Implementing the embodiments of this utility model will have the following beneficial effects:

[0015] According to the seat with rotatable armrests in the above embodiments, the two ends of the connecting member are respectively connected to the support member and the rotating mechanism. Under normal circumstances, the rotating member and the locking member are fixed together by the first locking part and the second locking part, and at this time, the rotating member and the locking member cannot rotate relative to each other. The locking member is fixed relative to the body, so the armrest cannot rotate at this time either. When it is necessary to rotate the armrest, the rotating member can be moved axially, thereby separating the first locking part and the second locking part, at which time the rotating member and the locking member can rotate relative to each other. The support member and the connecting member rotate together, thereby providing greater clearance space on the side of the seat.

[0016] According to the electric wheelchair in the above embodiments, since the seat has a rotating armrest, it is possible to realize an electric wheelchair that makes it convenient for the elderly to sit from the side of the seat. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] in:

[0019] Figure 1 A schematic diagram of the overall structure of an electric wheelchair according to an embodiment of the present invention is shown;

[0020] Figure 2 A schematic diagram of the overall structure of a seat with a rotatable armrest provided according to an embodiment of the present utility model is shown;

[0021] Figure 3 An exploded view of a seat with rotatable armrests according to an embodiment of the present invention is shown;

[0022] Figure 4 It shows Figure 3 A magnified view of a section at point A in the middle;

[0023] Figure 5 It shows Figure 2 A schematic diagram of the cross-section along the middle AA;

[0024] Figure 6 A schematic diagram of the overall structure of a rotating component according to an embodiment of the present invention is shown;

[0025] Figure 7 An exploded disassembly diagram of a rotatable handrail according to an embodiment of the present invention is shown.

[0026] Explanation of key component symbols:

[0027] Body-10; Handrail-20; Support component-210; Connector-220; Rotating mechanism-230; Locking component-2310; Rotating component-2320; First locking part-2311; Second locking part-2321; First elastic component-2330; Fastener-2340; Fixing position-2322; Step hole-2210; Linkage assembly-30; Driving component-310; Driven component-320; First guide surface-2323; Slide groove-2324; Second elastic component-330; Second guide surface-3210; Bottom surface-2325; Side wall-2326; Notch-2327; Vehicle body-40; Wheel-50. Detailed Implementation

[0028] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0029] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Firstly, this utility model provides a seat with rotatable armrests in its embodiments. Please refer to [reference needed]. Figures 2-6The seat with rotatable armrests includes a body 10 and an armrest 20. The armrest 20 includes a support member 210, a connector 220, and a rotating mechanism 230. The two ends of the connector 220 are connected to the support member 210 and the rotating mechanism 230, respectively. The rotating mechanism 230 includes a locking member 2310 and a rotating member 2320. The locking member 2310 is fixed on the body 10, and the locking member 2310 has a first locking part 2311 facing the rotating member 2320. The rotating member 2320 has a second locking part 2321 corresponding to the first locking part 2311 facing the locking member 2310. The connector 220 is used to drive the rotating member 2320 to rotate. The rotating member 2320 moves along the axial direction of the rotating member 2320 to engage or disengage the first locking part 2311 and the second locking part 2321.

[0032] According to the seat with rotatable armrests in the above embodiments, the two ends of the connector 220 are respectively connected to the support member 210 and the rotating mechanism 230. Under normal circumstances, the rotating member 2320 and the locking member 2310 are fixed together by the first locking part 2311 and the second locking part 2321, and the rotating member 2320 and the locking member 2310 cannot rotate relative to each other. The locking member 2310 is fixed relative to the body 10, so the armrest 20 cannot rotate at this time. When it is necessary to rotate the armrest 20, the rotating member 2320 can be moved axially, thereby separating the first locking part 2311 and the second locking part 2321, and the rotating member 2320 and the locking member 2310 can rotate relative to each other. The support member 210 and the connector 220 rotate together, thereby providing a larger clearance space on the side of the seat.

[0033] After the user is seated, the support member 210 is rotated again to return the armrest 20 to its original position. At this time, the rotating member 2320 can be manually moved to reset it. After the rotating member 2320 resets, the first locking part 2311 and the second locking part 2321 engage, thereby preventing the rotating member 2320 from rotating further. This also prevents the support member 210 and the connecting member 220 from rotating.

[0034] In this embodiment, the user can switch the rotating part 2320 between rotatable and non-rotatable by pulling or pressing the rotating part 2320.

[0035] In some specific embodiments, the first locking part 2311 is a pin hole or pin post, and the second locking part 2321 is a pin post or pin hole corresponding to the first locking part 2311.

[0036] In this embodiment, the first locking part 2311 can be configured as a pin, and the second locking part 2321 can be configured as a pin hole. When the pin is inserted into the pin hole, the locking member 2310 and the rotating member 2320 can be locked, thereby preventing the rotating member 2320 from rotating. When the pin is pulled out of the pin hole, the rotating member 2320 can rotate freely again.

[0037] Alternatively, the first locking part 2311 can be a pin hole and the second locking part 2321 can be a pin, which can also realize the engagement and disengagement between the locking part 2310 and the rotating part 2320.

[0038] It should be noted that the pins mentioned above are preferably metal parts, thus possessing high shear strength. Specifically, multiple mounting holes can be pre-drilled on the locking member 2310, and then the pins can be inserted into the mounting holes for fixation, thereby achieving rapid assembly of the handrail 20.

[0039] Figure 7 The second locking part 2321 described herein is a pin. Figure 7 In the embodiment described above, the second locking part 2321 is fixed on the rotating part 2320, and the pin hole on the locking part 2310 is the first locking part 2311. Figure 7 and Figure 4 The first locking part and the second locking part are labeled with opposite numbers, indicating two different implementations of the first locking part and the second locking part.

[0040] Furthermore, the first locking part 2311 and the second locking part 2321 can be connected in other ways, such as by a meshing gear structure. Alternatively, they can be connected by a magnetic coupling, a keyway connection, or other similar structures.

[0041] In some specific embodiments, the number of the first locking part 2311 and the second locking part 2321 is not less than two, and the first locking part 2311 and the second locking part 2321 are arranged circumferentially along the rotation axis of the rotating member 2320.

[0042] The number of first locking parts 2311 and second locking parts 2321 is not less than two, which can enhance the anti-rotation capability of locking member 2310 on rotating member 2320. Generally speaking, the number of second locking parts 2321 is greater than the number of first locking parts 2311, so that locking member 2310 and rotating member 2320 can be locked at different rotation angles, giving users better choices.

[0043] In some specific embodiments, please refer to Figure 3 and Figure 6The rotating mechanism 230 also includes a first elastic element 2330 and a fastener 2340. The rotating element 2320 is provided with a fixed position 2322 corresponding to the fastener 2340. The connecting element 220 is provided with a stepped hole 2210. The fastener 2340 passes through the stepped hole 2210 and is connected to the fixed position 2322. The first elastic element 2330 passes through the fastener 2340 and its two ends respectively abut against the edge of the stepped hole 2210 and the end of the fastener 2340 away from the rotating element 2320.

[0044] In this embodiment, the first elastic element 2330 is first fitted onto the fastener 2340. Then, the fastener 2340 is passed through the stepped hole 2210 on the connector 220, and finally, the fastener 2340 is connected to the fixing position 2322 on the rotating member 2320. At this time, one end of the first elastic element 2330 abuts against the edge of the stepped hole 2210, and the other end abuts against the fastener 2340. The first elastic element 2330 forces the connector 220 and the rotating member 2320 closer together. This arrangement allows the rotating mechanism 230 to have an automatic reset function. That is, after the rotating member 2320 rotates to a certain angle, under the action of the first elastic element 2330, the first locking part 2311 and the second locking part 2321 will immediately engage after contact, locking the rotating member 2320 and the locking part 2310 together.

[0045] Fastener 2340 is typically a bolt or screw, and the corresponding fixing position 2322 is usually a screw hole. Alternatively, fastener 2340 can be snapped into fixing position 2322.

[0046] In some specific embodiments, please refer to Figures 3-6 It also includes a linkage component 30, which includes a driving component 310 and a driven component 320. The middle part of the driving component 310 is rotatably connected to the support component 210. The rotating component 2320 is provided with a first guide surface 2323. The driving component 310 is driven to move the driven component 320. When one end of the driven component 320 moves on the first guide surface 2323, the rotating component 2320 moves.

[0047] In this embodiment, the user directly presses the drive member 310 at the support member 210 to make the drive member 310 rotate. The drive member 310 drives the driven member 320 to move. One end of the driven member 320 moves along the first guide surface 2323, thereby causing the rotating member 2320 to move along the axis of the rotating member 2320, and finally realizing the engagement and disengagement of the first locking part 2311 and the second locking part 2321.

[0048] It should be noted that, under normal circumstances, the drive unit 310 initially maintains the mutual locking of the first locking part 2311 and the second locking part 2321 under the action of gravity.

[0049] It should be noted that the driven member 320 is generally movably mounted on the connecting member 220. The driven member 320 is generally provided with a strip-shaped mounting hole, and is movably connected to the connecting member 220 by bolts. The length direction of the strip-shaped mounting hole is the direction of movement of the driven member 320.

[0050] In some specific embodiments, the rotating member 2320 is further provided with a groove 2324, in which at least part of the follower 320 is restricted to move.

[0051] Preferably, the first guide surfaces 2323 are all within the slide grooves 2324, thereby guiding the movement direction of the driven member 320. Preferably, there are two first guide surfaces 2323 and two slide grooves 2324, symmetrically arranged about the rotation center of the rotating member 2320. Correspondingly, one end of the driven member 320 branches off to form two abutment points, the middle of which serves as a clearance space to avoid the fixed position 2322.

[0052] In some specific embodiments, a second elastic member 330 is also included, with the two ends of the second elastic member 330 connected to the follower 320 and the connector 220, respectively.

[0053] The purpose of the second elastic member 330 is mainly to reset the driving member 310. When the force applied to the driving member 310 is removed, the second elastic member 330 forces the driven member 320 to return to its initial position, thereby driving the driving member 310 back to its initial position. This also prevents accidental contact with the driving member 310, which would cause the first locking part 2311 and the second locking part 2321 to unlock.

[0054] In some specific embodiments, the follower 320 is provided with a second guide surface 3210 at one end near the rotating member 2320, and the second guide surface 3210 is provided in correspondence with the first guide surface 2323.

[0055] The second guide surface 3210 is opposite to the first guide surface 2323, which increases the distance that the rotating component 2320 can move along its own axis. That is, the distance that the rotating component 2320 moves is equal to the sum of the height differences between the first guide surface 2323 and the second guide surface 3210.

[0056] In some specific embodiments, the rotating member 2320 includes a bottom surface 2325 and a side wall 2326 connected to each other, the side wall 2326 having a notch 2327 for inserting the follower 320.

[0057] After the follower 320 is inserted into the notch 2327, it can move normally. When it is necessary to rotate the connector 220, the follower 320 abuts against the notch 2327, thereby causing the rotating member 2320 to rotate synchronously. The rotation of the follower 320 is synchronized with the rotation of the support member 210 and the connector 220, so that the rotating member 2320, the connector 220, and the support member 210 rotate synchronously.

[0058] Secondly, this utility model also provides an electric wheelchair, including a body 40, wheels 50, and a seat with rotatable armrests as described in the first aspect.

[0059] According to the electric wheelchair in the above embodiments, since the seat has a rotating armrest, it is possible to realize an electric wheelchair that makes it convenient for the elderly to sit from the side of the seat.

[0060] The following describes the implementation of the rotatable armrest seat of this utility model in detail, using the second locking part as the pin as an example.

[0061] When the user presses the drive member 310, the drive member 310 rotates, thereby causing the driven member 320 to move. The second guide surface 3210 of the driven member 320 begins to move along the first guide surface 2323. Along with the movement of the driven member 320, the rotating member 2320 begins to move relative to the locking member 2310, thereby separating the first locking part 2311 and the second locking part 2321. The armrest 20 can then rotate relative to the body 10.

[0062] When the user removes the force applied to the drive member 310, the driven member 320 begins to reset under the action of the second elastic member 330. The second guide surface 3210 removes the force applied to the first guide surface 2323, and under the action of the first elastic member 2330, the rotating member 2320 begins to move to connect the first locking part 2311 and the second locking part 2321. This ultimately achieves mutual fixation between the armrest 20 and the body 10.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A seat with rotatable armrests, characterized in that, The device includes a body and a handrail. The handrail includes a support member, a connector, and a rotating mechanism. The two ends of the connector are respectively connected to the support member and the rotating mechanism. The rotating mechanism includes a locking member and a rotating member. The locking member is fixed to the body and has a first locking part facing the rotating member. The rotating member has a second locking part facing the locking member, which corresponds to the first locking part. The connector is used to drive the rotating member to rotate. The rotating member moves along the axial direction of the rotating member to engage or disengage the first locking part and the second locking part.

2. The seat with rotatable armrests as described in claim 1, characterized in that, The first locking part is a pin hole, so the second locking part is a pin that mates with the pin hole; or, the first locking part is a pin, so the second locking part is a pin hole that mates with the pin.

3. The seat with rotatable armrests as described in claim 1, characterized in that, The number of the first locking part and the second locking part is not less than two, and the first locking part and the second locking part are arranged circumferentially along the rotation axis of the rotating member.

4. The seat with rotatable armrests as described in claim 1, characterized in that, The rotating mechanism further includes a first elastic element and a fastener. The rotating element has a fixed position corresponding to the fastener. The connecting element has a stepped hole. The fastener passes through the stepped hole and is connected to the fixed position. The first elastic element passes through the fastener and its two ends respectively abut against the edge of the stepped hole and the end of the fastener away from the rotating element.

5. The seat with rotatable armrests as described in claim 1, characterized in that, It also includes a linkage component, which includes a driving component and a driven component. The middle part of the driving component is rotatably connected to the support component. The rotating component is provided with a first guide surface. Driving the driving component moves the driven component. When one end of the driven component moves on the first guide surface, the rotating component moves.

6. The seat with rotatable armrests as described in claim 5, characterized in that, The rotating member is also provided with a slide groove, and at least part of the driven member is restricted to move in the slide groove.

7. The seat with rotatable armrests as described in claim 5, characterized in that, The linkage component also includes a second elastic element, the two ends of which are respectively connected to the driven element and the connecting element.

8. The seat with rotatable armrests as described in claim 5, characterized in that, The driven member has a second guide surface at one end near the rotating member, and the second guide surface is provided corresponding to the first guide surface.

9. The seat with rotatable armrests as described in claim 5, characterized in that, The rotating member includes a bottom surface and a side wall that are connected to each other, the side wall having a notch for inserting the driven member.

10. An electric wheelchair, characterized in that, The seat includes the vehicle body, wheels, and the rotatable armrests as described in any one of claims 1-9.

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