Articulated headrest structure for wheelchair

Abstract

A joint type headrest structure for a wheelchair comprises a headrest and a joint type headrest adjusting mechanism, and is characterized in that the joint type headrest adjusting mechanism comprises a headrest fixing plate, a group of joint arms, a joint arm locking and releasing device, a joint arm lower transition connecting plate and a chair back framework fixing plate, the headrest fixing plate is fixed to the middle of the side, back to a seated person, of the headrest in the using state, a headrest fixing plate joint arm hinge fin plate extends from the side, back to the headrest, of the headrest fixing plate, and the headrest fixing plate joint arm hinge fin plate forms a set of headrest fixing plate joint arm hinge fin plate grooves. A group of joint arm lower transition connecting plate fins are formed on one side, back to the headrest, of the joint arm lower transition connecting plate; two adjacent joint arms, the joint arms and the joint arm hinge wing plates of the headrest fixing plate as well as the joint arms and the joint arm lower transition connecting plate fins are locked or released by joint arm locking and releasing devices. The device has the advantage that the expected comfortable head leaning effect is achieved for a wheelchair passenger.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheelchair components, and in particular relates to an articulated headrest structure for a wheelchair. Background Art

[0002] As is known in the industry, the aforementioned wheelchairs can be broadly divided into electric-driven wheelchairs and non-electric hand-pushed wheelchairs, and both electric and non-electric wheelchairs are generally provided with a headrest for the occupant's head to rest on at the center of the upper part of the backrest. In the prior art, there are mainly two types of headrest structures for wheelchairs: one is to construct a non-adjustable headrest on the side of the upper backrest facing the occupant, that is, to form a headrest that is integrated with the backrest and protrudes from the backrest on the side of the upper backrest facing the forward direction of the wheelchair; the other is to design the headrest to be adjustable up and down relative to the backrest, such as CN105708632A (a wheelchair for cerebral palsy) and CN274544Y (a multifunctional electric wheelchair).

[0003] The disadvantage of the above two structural forms of headrests is that since the inclination of the headrest cannot be adjusted, the occupants cannot obtain the desired selectivity and comfort. Especially for wheelchairs that can be used for both sitting and lying, the inclination of the headrest usually needs to be reasonably adjusted to different angles in the sitting and lying states, so that the occupants can obtain relatively better comfort in the lying state. Utility Model Content

[0004] The utility model aims to provide an articulated headrest structure for a wheelchair, which is helpful for adjusting the angle of forward tilt and backward tilt as required so that the seated person can obtain the desired comfort.

[0005] The task of the utility model is accomplished in this way. An articulated headrest structure for a wheelchair comprises a headrest and an articulated headrest adjustment mechanism, characterized in that the articulated headrest adjustment mechanism comprises a headrest fixing plate, a group of articulated arms, an articulated arm locking and releasing device, a transition connecting plate under the articulated arm and a seat back frame fixing plate, the headrest fixing plate is fixed to the center position in the length direction of the side of the headrest facing away from the occupant in the use state by a group of headrest fixing plate screws, a headrest fixing plate articulated arm articulated fin plate extends from the side of the headrest fixing plate facing away from the headrest, and the articulated fin plate of the headrest fixing plate articulated arm constitutes a group of headrest fixing plate articulated arms spaced apart from each other An articulated fin plate groove is provided, and a group of spaced articulated arm lower transition connecting plate fins are formed on the side of the articulated arm lower transition connecting plate also facing away from the headrest, and the articulated arm lower transition connecting plate is fixed to the seat back frame fixing plate by a group of articulated arm lower transition connecting plate screws, and the seat back frame fixing plate is fixed to the upper part of the seat back frame when in use, a group of articulated arms are connected between the articulated fin plate of the headrest fixing plate articulated arm and the fin of the articulated arm lower transition connecting plate, and the two adjacent articulated arms, the articulated fin plate of the articulated arm and the headrest fixing plate articulated arm, and the articulated arm and the fin of the articulated arm lower transition connecting plate are each locked or released by the articulated arm locking and releasing device.

[0006] In the utility model, a group of articulated arm hinged wing pieces are formed at both ends of each articulated arm in a group of articulated arms, and the articulated wing pieces of the articulated arms are hingedly connected and locked or released with the articulated wing pieces of the headrest fixing plate articulated arm, the articulated arm lower transition connecting plate fins, and the articulated wing pieces of the articulated arms at the opposite ends of two adjacent articulated arms through the articulated arm locking and releasing device.

[0007] In the utility model, the articulated wing of the articulated arm and the articulated fin groove of the headrest fixing plate articulated fin of the headrest fixing plate articulated wing are forked-finger articulated, and the articulated wing of the articulated arm and the fin of the lower transition connecting plate of the articulated arm are also forked-finger articulated, and the articulated wing of the articulated arm at the opposite end of the adjacent articulated arms are forked-finger articulated.

[0008] In the utility model, the aforementioned joint arm locking and releasing device includes a locking shaft, a locking shaft matching nut sleeve, a nut sleeve matching screw sleeve, a matching screw sleeve operating handle sleeve, a reset spring and a handle locking screw. The left end of the locking shaft passes through the joint arm hinged wing and extends to the left side of the joint arm. A locking shaft thread is formed at the left end of the locking shaft, and a flange-shaped rib with a diameter greater than the diameter of the locking shaft is formed at the right end of the locking shaft. The flange-shaped rib contacts the right side surface of the joint arm. A spiral locking shaft matching nut sleeve cavity wall thread is formed on the cavity wall of the locking shaft matching nut sleeve of the locking shaft matching nut sleeve. The locking shaft matching nut sleeve cavity wall thread is matched with the locking shaft thread thread. On the outer wall of the locking shaft matching nut sleeve, spaced transverse lines parallel to the length direction of the locking shaft matching nut sleeve are formed. On the cavity wall of the nut sleeve matching screw sleeve, nut sleeve transverse spacing lines are formed, and a handle limiting screw connecting thread is formed at the left end of the cavity wall of the nut sleeve matching screw sleeve. , on the outer wall of the left end of the nut sleeve and the matching screw sleeve, there are formed outer wall transverse patterns, the nut sleeve transverse spacing patterns cooperate with the spacing transverse patterns, the matching screw sleeve operating handle sleeve forms a matching screw sleeve operating handle sleeve cavity, the nut sleeve and the matching screw sleeve are accommodated in the matching screw sleeve operating handle sleeve cavity, and on the cavity wall at the front end of the matching screw sleeve operating handle sleeve cavity, there are formed spacing transverse matching patterns, the spacing transverse matching patterns cooperate with the outer wall transverse patterns, a spring supporting cavity is formed at the center position of the left end face of the matching screw sleeve operating handle sleeve, a matching screw sleeve operating handle extends on the outer wall of the matching screw sleeve operating handle sleeve, a reset spring is located in the spring supporting cavity and is sleeved on the handle locking screw, the left end of the reset spring is supported on the handle locking screw, and the right end is supported on the cavity bottom wall of the spring supporting cavity, the handle locking screw penetrates into the matching screw sleeve operating handle sleeve cavity through the center hole on the cavity bottom wall of the spring supporting cavity and is threadedly connected with the handle limiting screw connecting thread.

[0009] In the utility model, the headrest includes a headrest cushion support plate and a headrest cushion, the headrest cushion is fixed to the side of the headrest cushion support plate facing the wheelchair occupant in the use state, and the headrest fixing plate is fixed to the side of the headrest cushion support plate facing away from the headrest cushion.

[0010] In the utility model, the headrest cushion support plate is a metal plate or a non-metal plate, and the headrest cushion is a sponge pillow.

[0011] In the utility model, a head-resting concave cavity is formed in the middle of the headrest cushion on the side facing away from the headrest cushion supporting plate.

[0012] The technical solution provided by the utility model is that the articulated arm locking and releasing device of the articulated headrest adjustment mechanism adjusts the angle of a group of articulated arms as needed, so that the position of the headrest is adjusted accordingly by the articulated arms, so that the wheelchair occupant can obtain the desired comfortable effect of head resting. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of an embodiment of the utility model;

[0014] Figure 2 for Figure 1 A perspective exploded structural diagram of the articulated arm locking and releasing device is shown. DETAILED DESCRIPTION

[0015] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description in the form of embodiments below. However, the description of the embodiments is not a limitation on the present invention. Any equivalent changes made based on the concept of the present invention that are merely formal and not substantial should be regarded as within the scope of the technical solution of the present invention.

[0016] In the following description, all possible concepts of up, down, left, right, front and back directions or orientations are based on Figure 1 The position state is taken as a reference, and therefore it cannot be understood as a special limitation on the technical solution provided by the utility model.

[0017] See also Figure 1 , a headrest 1 and an articulated headrest adjustment mechanism 2 are shown.

[0018] As the technical key points of the technical solution provided by the utility model: the aforementioned articulated headrest adjustment mechanism 2 includes a headrest fixing plate 21, a group of articulated arms 22, an articulated arm locking and releasing device 23, an articulated arm lower transition connecting plate 24 and a seat back frame fixing plate 25, the headrest fixing plate 21 is fixed to the central position in the length direction of the side of the aforementioned headrest 1 facing away from the seat occupant in the use state by a group of headrest fixing plate screws 211, and a headrest fixing plate articulated arm hinged fin plate 212 is extended on the side of the headrest fixing plate 21 facing away from the headrest 1, that is, the headrest fixing plate articulated fin plate 212 and the headrest fixing plate 21 form an integral structure, the headrest fixing plate articulated fin plate 212 is composed of a group of headrest fixing plate articulated fin plate grooves 2121 separated from each other, and the lower transition connecting plate 25 of the aforementioned articulated arm is fixed to the central position in the length direction of the side of the aforementioned headrest 1 facing away from the seat occupant in the use state, and a headrest fixing plate articulated arm hinged fin plate 212 is extended on the side of the headrest fixing plate 21 facing away from the headrest 1, that is, the headrest fixing plate articulated arm articulated fin plate 212 and the headrest fixing plate 21 form an integral structure, and the headrest fixing plate articulated fin plate 212 is composed of a group of headrest fixing plate articulated arm articulated fin plate grooves 2121 separated from each other, and the lower transition connecting plate 25 of the aforementioned articulated arm is fixed to the central position in the length direction of the side of the aforementioned headrest 1 facing away from the seat occupant in the use state. The connecting plate 24 also forms a group of spaced joint arm lower transition connecting plate fins 241 on the side facing away from the headrest 1, and the joint arm lower transition connecting plate 24 is fixed to the seat back frame fixing plate 25 by a group of joint arm lower transition connecting plate screws 242, and the seat back frame fixing plate 25 is fixed to the upper part of the seat back frame when in use, that is, fixed to the middle part of the length direction of the upper cross tube of the seat back frame in the shape of a U. A group of joint arms 22 are connected between the aforementioned headrest fixing plate joint arm articulated fin plate 212 and the joint arm lower transition connecting plate fin 241, and the two adjacent joint arms 22, the joint arm 22 and the headrest fixing plate joint arm articulated fin plate 212, and the joint arm 22 and the joint arm lower transition connecting plate fin 241 are each locked or released by the aforementioned joint arm locking and releasing device 23.

[0019] A group of articulated arm hinged wing pieces 221 are formed at both ends of each articulated arm in a group of articulated arms 22. The articulated arm hinged wing pieces 221 are hingedly connected and locked or released with the articulated fin plate 212 of the headrest fixing plate articulated arm, the articulated arm lower transition connecting plate fin piece 241 and the articulated arm hinged wing pieces 221 at the opposite ends of two adjacent articulated arms 22 through the articulated arm locking and releasing device 23.

[0020] The aforementioned articulated arm hinged wing 221 and the headrest fixed plate articulated fin groove 2121 of the aforementioned headrest fixed plate articulated fin 212 are interdigitated hinged, and the articulated arm hinged wing 221 and the articulated arm lower transition connecting plate fin 241 are also interdigitated hinged, and the articulated arm hinged wing 221 at the opposite end of the adjacent articulated arm 22 is interdigitated hinged.

[0021] In this embodiment, the aforementioned headrest fixing plate 21, a set of articulated arms 22 and the transition connecting plate 24 under the articulated arms are formed by plastic molding, while the backrest frame fixing plate 25 is preferably made of metal plate so that it can be welded to the upper part of the backrest frame, which is usually made of metal. The outer shape of the backrest frame is well known and generally in the shape of a U.

[0022] See also Figure 2 The aforementioned joint arm locking and releasing device 23 includes a locking shaft 231, a locking shaft matching nut sleeve 232, a nut sleeve matching screw sleeve 233, a matching screw sleeve operating handle sleeve 234, a reset spring 235 and a handle locking screw 236. The left end of the locking shaft 231 passes through the aforementioned joint arm hinge wing 221 and extends to the left side of the joint arm 22. A locking shaft thread 2311 is formed at the left end of the locking shaft 231, and a flange-shaped rib 2312 with a diameter greater than the diameter of the locking shaft 231 is formed at the right end of the locking shaft 231. The flange-shaped rib 2312 contacts the right side surface of the aforementioned joint arm 22. The locking shaft mating nut sleeve 232 has a spiral locking shaft mating nut sleeve cavity wall thread 2321 formed on the cavity wall of the locking shaft mating nut sleeve 232, and the locking shaft mating nut sleeve cavity wall thread 2321 is threadedly matched with the aforementioned locking shaft thread 2311, and the outer wall of the locking shaft mating nut sleeve 232 is formed with spaced transverse grooves 2322 parallel to the length direction of the locking shaft mating nut sleeve 232, and the cavity wall of the nut sleeve mating screw sleeve 233 is formed with nut sleeve transverse spaced grooves 2331, and the left end of the cavity wall of the nut sleeve mating screw sleeve 233 is formed with a handle limiting screw connecting thread 2333, and the nut sleeve mating screw sleeve 233 is formed with a handle limiting screw connecting thread 2333. The left end outer wall of the screw sleeve 233 is formed with an outer wall transverse pattern 2332, the aforementioned nut sleeve transverse spacing pattern 2331 cooperates with the aforementioned spacing transverse pattern 2322, the matching screw sleeve operating handle sleeve 234 is formed with a matching screw sleeve operating handle sleeve cavity 2341, the aforementioned nut sleeve matching screw sleeve 233 is accommodated in the matching screw sleeve operating handle sleeve cavity 2341, and the cavity wall at the front end of the matching screw sleeve operating handle sleeve cavity 2341 is formed with spacing transverse matching patterns 2342, the spacing transverse matching patterns 2342 cooperate with the aforementioned outer wall transverse patterns 2332, and the left end surface of the matching screw sleeve operating handle sleeve 234 is formed with a matching screw sleeve operating handle sleeve cavity 2341. A spring supporting cavity 2343 is formed at the center position, and a matching screw sleeve operating handle 2344 is extended on the outer wall of the matching screw sleeve operating handle sleeve 234. The reset spring 235 is located in the aforementioned spring supporting cavity 2343 and is sleeved on the handle locking screw 236. The left end of the reset spring 235 is supported on the handle locking screw 236, and the right end is supported on the cavity bottom wall of the spring supporting cavity 2343. The handle locking screw 236 penetrates into the matching screw sleeve operating handle sleeve cavity 2341 through the center hole on the cavity bottom wall of the spring supporting cavity 2343 and is threadedly connected with the aforementioned handle limiting screw connecting thread 2333.

[0023] like Figure 1As shown, after the angle of the joint arm 22 together with the headrest 1 is adjusted, the joint arm locking release device 23 is operated to lock the joint arm hinge wing 221 and the headrest fixing plate joint arm hinge fin 212, lock the joint arm hinge wing 221 at the opposite ends of the two adjacent joint arms 22 with each other, and lock the joint arm hinge wing 221 and the joint arm lower transition connecting plate fin 241. Because the locking shaft 231 of the structural system of the joint arm locking release device 23 is in an unlocked state during the adjustment of the joint arm 22 together with the headrest 1, it needs to be locked. The specific operation is: just turn the matching screw sleeve operating handle 2344, which drives the matching screw sleeve operating handle sleeve 234, and drives the nut sleeve matching screw sleeve 233 through the matching of the spaced transverse matching lines 2342 and the outer wall transverse lines 2332, and drives the locking shaft matching nut sleeve 232 through the spaced transverse lines 2322, and drives the locking shaft matching nut sleeve 232 through the locking shaft thread 2311, until a set of joint arms 22 and the headrest 1 are locked at the desired angle adjustment position. The same applies in reverse.

[0024] Since a group of articulated arms 22 has multiple (three in this embodiment) aforementioned mating screw sleeve operating handles 2344, in order to avoid interference between the mating screw sleeve operating handles 2344 or the mating screw sleeve operating handles 2344 on other components, when interference occurs, just press the aforementioned handle locking screw 236 with the thumb and pull the mating screw sleeve operating handle 2344 outward at the same time, such as pulling the mating screw sleeve operating handle 2344 to the left, and the reset spring 235 is compressed. At this time, due to the separation (detachment) of the spaced transverse mating patterns 2342 and the outer wall transverse patterns 2332, the mating screw sleeve operating handle 2344 can be idle and rotated to a non-interference position, and then the fingers are removed from the handle locking screw 236 and the mating screw sleeve operating handle 2344. Under the action of the restoring force of the reset spring 235, the mating screw sleeve operating handle sleeve 234 is reset. Specifically, the aforementioned spaced transverse mating patterns 2342 and the aforementioned outer wall transverse patterns 2332 are in a mutually meshing state, that is, the original connection relationship is restored.

[0025] Undoubtedly, the adjustment of the articulated headrest adjustment mechanism 2 can change the angle of a set of articulated arms 22 as required, so that the headrest 1 can meet the comfort level required by the occupant.

[0026] Please continue to see Figure 1 The headrest 1 comprises a headrest cushion support plate 11 and a headrest cushion 12. The headrest cushion 12 is fixed to the side of the headrest cushion support plate 11 facing the wheelchair occupant when in use. Figure 1At the rear side of the position shown, the headrest fixing plate 21 and the headrest cushion support plate 11 are facing away from the side of the headrest cushion 12 (i.e. Figure 1 The front side of the device (in the position shown) is fixed.

[0027] In the present embodiment, the headrest cushion support plate 11 is a metal plate, but a non-metal plate such as a plastic plate may also be used, and the headrest cushion 12 is a sponge pillow.

[0028] On the side of the headrest cushion 12 facing away from the headrest cushion support plate 11, Figure 1 A head-abutting cavity 121 is formed in the middle of the rear side in the shown position.

[0029] In summary, the technical solution provided by the utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. An articulated headrest structure for a wheelchair, comprising a headrest (1) and an articulated headrest adjustment mechanism (2), characterized in that: The articulated headrest adjustment mechanism (2) comprises a headrest fixing plate (21), a group of articulated arms (22), an articulated arm locking and releasing device (23), a transition connecting plate (24) below the articulated arms, and a seat back frame fixing plate (25). The headrest fixing plate (21) is fixed to the center position of the length direction of the side of the headrest (1) facing away from the seat occupant in the use state by a group of headrest fixing plate screws (211). A headrest fixing plate articulated arm hinged fin plate (212) extends from the side of the headrest fixing plate (21) facing away from the headrest (1). The headrest fixing plate articulated fin plate (212) is formed with a group of mutually spaced headrest fixing plate articulated fin plate grooves (2121). The transition connecting plate (24) below the articulated arm also faces away from the headrest (1). A group of spaced joint arm lower transition connecting plate fins (241) are formed on one side, and the joint arm lower transition connecting plate (24) is fixed to the seat back frame fixing plate (25) by a group of joint arm lower transition connecting plate screws (242), and the seat back frame fixing plate (25) is fixed to the upper part of the seat back frame in the use state, a group of joint arms (22) are connected between the headrest fixing plate joint arm articulated fin plate (212) and the joint arm lower transition connecting plate fin (241), and the two adjacent joint arms (22), the joint arm (22) and the headrest fixing plate joint arm articulated fin plate (212), and the joint arm (22) and the joint arm lower transition connecting plate fin (241) are each locked or released by the joint arm locking and releasing device (23).

2. The articulated headrest structure for a wheelchair according to claim 1, characterized in that: A group of articulated arm hinged wing pieces (221) are respectively formed at both ends of each articulated arm in a group of articulated arms (22), and the articulated arm hinged wing pieces (221) are hingedly connected and locked or released with the articulated wing pieces (212) of the headrest fixing plate articulated arm, the articulated arm lower transition connecting plate fins (241), and the articulated arm hinged wing pieces (221) at the opposite ends of two adjacent articulated arms (22) through the articulated arm locking and releasing device (23).

3. The articulated headrest structure for a wheelchair according to claim 2, characterized in that: The articulated wing (221) of the articulated wing of the articulated wing of the articulated wing of the headrest fixing plate (212) of the articulated wing of the articulated wing (212) of the headrest fixing plate is articulated in an interdigitated manner, and the articulated wing (221) of the articulated arm and the fin (241) of the lower transition connecting plate of the articulated arm are also articulated in an interdigitated manner, and the articulated wing (221) of the articulated arm at the opposite end of the adjacent articulated arm (22) is articulated in an interdigitated manner.

4. The articulated headrest structure for a wheelchair according to claim 1 or 2, characterized in that: The aforementioned joint arm locking and releasing device (23) comprises a locking shaft (231), a locking shaft matching nut sleeve (232), a nut sleeve matching screw sleeve (233), a matching screw sleeve operating handle sleeve (234), a return spring (235) and a handle locking screw (236); the left end of the locking shaft (231) passes through the joint arm hinge wing (221) and extends to the left side of the joint arm (22); a locking shaft thread (2311) is formed at the left end of the locking shaft (231); and a flange-shaped retaining edge (2312) having a diameter greater than that of the locking shaft (231) is formed at the right end of the locking shaft (231); the flange-shaped retaining edge (2312) is connected to the right side of the joint arm (22); The locking shaft mating nut sleeve (232) is in side contact, a spiral locking shaft mating nut sleeve cavity wall thread (2321) is formed on the cavity wall of the locking shaft mating nut sleeve (232), the locking shaft mating nut sleeve cavity wall thread (2321) is threadedly matched with the locking shaft thread (2311), and the outer wall of the locking shaft mating nut sleeve (232) is formed with spaced transverse lines (2322) parallel to the length direction of the locking shaft mating nut sleeve (232), and the cavity wall of the nut sleeve mating screw sleeve (233) is formed with nut sleeve transverse spaced lines (2331), and a handle limiting screw connection thread (2333) is formed at the left end of the cavity wall of the nut sleeve mating screw sleeve (233), and the nut sleeve mating screw sleeve (233) is formed with a screw thread (2333) on the left end of the cavity wall. The left end outer wall of the sleeve matching screw sleeve (233) is formed with an outer wall transverse pattern (2332), the nut sleeve transverse spacing pattern (2331) is matched with the spacing transverse pattern (2322), the matching screw sleeve operating handle sleeve (234) is formed with a matching screw sleeve operating handle sleeve cavity (2341), the nut sleeve matching screw sleeve (233) is accommodated in the matching screw sleeve operating handle sleeve cavity (2341), and the cavity wall at the front end of the matching screw sleeve operating handle sleeve cavity (2341) is formed with spacing transverse matching pattern (2342), the spacing transverse matching pattern (2342) is matched with the outer wall transverse pattern (2332), and the left end of the matching screw sleeve operating handle sleeve (234) is formed with a spacing transverse matching pattern (2342). A spring supporting cavity (2343) is formed at the center position of the surface, a matching screw sleeve operating handle (2344) extends on the outer wall of the matching screw sleeve operating handle sleeve (234), a reset spring (235) is located in the spring supporting cavity (2343) and is sleeved on the handle locking screw (236), the left end of the reset spring (235) is supported on the handle locking screw (236), and the right end is supported on the cavity bottom wall of the spring supporting cavity (2343), the handle locking screw (236) penetrates into the matching screw sleeve operating handle sleeve cavity (2341) through the center hole on the cavity bottom wall of the spring supporting cavity (2343), and is threadedly connected with the handle limiting screw connecting thread (2333).

5. The articulated headrest structure for a wheelchair according to claim 1, characterized in that: The headrest (1) comprises a headrest cushion support plate (11) and a headrest cushion (12); the headrest cushion (12) is fixed to a side of the headrest cushion support plate (11) facing a wheelchair occupant in a use state; and the headrest fixing plate (21) is fixed to a side of the headrest cushion support plate (11) facing away from the headrest cushion (12).

6. The articulated headrest structure for a wheelchair according to claim 5, characterized in that: The headrest cushion support plate (11) is a metal plate or a non-metal plate, and the headrest cushion (12) is a sponge cushion.

7. The articulated headrest structure for a wheelchair according to claim 5 or 6, characterized in that: A head-resting concave cavity (121) is formed in the middle of the side of the headrest cushion (12) facing away from the headrest cushion support plate (11).

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