Seat structure for wheelchair

Abstract

The utility model relates to the field of wheelchairs, in particular to a wheelchair seat structure which comprises a foaming cushion body and a core frame, the core frame at least comprises a front supporting part located on the front side, side supporting parts located on the two sides and a bottom supporting part located in the center of the core frame, and the front supporting part extends in the two side directions of the foaming cushion body; the side supporting parts extend in the front-back direction of the foaming cushion body. The core frame of the seat is wrapped in the foaming cushion body, that is, the core frame can be preset before the seat cushion is foamed, then the foaming material is poured in for foaming, and the foaming cushion body wraps the core frame and is tightly connected with the foaming cushion body in the foaming process, so that seamless bonding and tight matching of the core frame and the foaming cushion body are realized; a user is not prone to collision, using is safer, meanwhile, damage is not prone to occurring in the carrying process, the core frame and the foaming cushion body are not prone to separation or layering, damage is not prone to occurring, and the core frame is not prone to falling apart.

Description

Technical Field

[0001] The invention relates to the field of wheelchairs, and in particular to a seat structure for a wheelchair. Background Art

[0002] The seats of existing wheelchairs have a folding function due to the particularity of the main body, and the folding operating handles are generally set at the bottom of the seat, and the rigid structural components at the bottom of the seat are exposed. Existing wheelchairs generally have a rigid seat frame as the bottom, and then a bottom plate is laid on the rigid seat frame, and then a cushion is set on the bottom plate. The complex structure at the bottom of the seat frame is exposed. Due to the particularity of the wheelchair user group, most of them are people with limited mobility. When folding the wheelchair, they need to grab the seat folding handle at the bottom of the seat, or when sitting on the seat, the body is tilted, or during normal moving, or when falling, they may bump into the bottom rigid structure, especially the edge of the bottom rigid structure, which is dangerous for users with limited mobility or patients. This type of user group needs to be protected in many aspects in daily life, and wheelchairs that are frequently used or used for a long time need to be fully considered in terms of safety. In addition, the traditional layered structure has poor stability and is prone to delamination after long-term use.

[0003] In addition, the backrest of the existing wheelchair is generally installed on the seat before leaving the factory. Since the seat is relatively high, the wheelchair is relatively large even after being folded and stowed, and is inconvenient to transport. Summary of the invention

[0004] In view of the problems in the related art, the present invention provides a seat structure for a wheelchair.

[0005] To this end, the specific technical solution adopted by the present invention is as follows:

[0006] A wheelchair seat structure comprises a foam cushion body and a core frame buried in the foam cushion body, with the human body's sitting position when the foam cushion body is used as a reference, the front of the body is the front side, and the back of the body is the back side, the core frame at least comprises a front support part located at the front side, side support parts located at both sides, and a bottom support part located at the center of the core frame, the front support part extends along both sides of the foam cushion body, the side support parts extend along the front and back directions of the foam cushion body, the front support part and the side support parts are continuous support components or point support components arranged in gaps, and at least the outer peripheral edge and the top of the core frame are buried in the foam cushion body.

[0007] Preferably, the front support part and the side support part are continuous tubes or plates; the bottom support part is a rigid tube or plate structure, or a flexible sheet or belt structure, or a structure of a combination of rigid material and flexible material.

[0008] Preferably, a chair back frame is inserted into the rear end of the core frame, and an armrest is connected to the chair back frame or the rear end of the core frame.

[0009] Preferably, the front support portion and the side support portions on both sides are continuous curved pipes connected in sequence, and the bottom support portion is a connecting pipe connected between the side support portions on both sides.

[0010] Preferably, a reinforcement stopper is provided between the connecting pipes and / or between the connecting pipe and the front support portion along the forward direction of the seat.

[0011] Preferably, the outer surface of the core frame is provided with protrusions for increasing the gripping force with the foam pad, and the protrusions are arranged at the bottom or side of the core frame; and / or the outer surface of the core frame is a rough surface.

[0012] Preferably, the rear end of the core frame is detachably connected to a seat component, the seat component includes a connector and a chair back frame, the connector is provided with a plug hole or a plug tube, and the chair back frame is inserted into or sleeved on the plug hole or the plug tube.

[0013] Preferably, a detachable handrail is provided between the rear end of the core frame and the connecting member.

[0014] Preferably, the foam cushion body is provided with a plurality of through holes which penetrate the foam cushion body vertically.

[0015] Preferably, a positioning piece is detachably provided at the external mounting hole of the core frame in the foam pad body, and / or a recessed groove is provided on the foam pad body for exposing part or all of the mounting position; the inner end of the positioning piece abuts against or is connected to the external mounting hole of the core frame, and the outer end passes through the foam pad body or is arranged close to the outer surface of the foam pad body.

[0016] Preferably, the positioning member comprises a soft outer sleeve and a hard, detachable supporting member inserted into the positioning member.

[0017] Preferably, a cushion cover is detachably provided on the outer surface of the foam cushion.

[0018] The beneficial effects of the present invention are:

[0019] 1. The core frame of the chair seat of the present application is wrapped in a foam cushion body, that is, before the cushion is foamed, the core frame can be pre-set and then the foaming material can be poured in for foaming. During the foaming process, the foam cushion body wraps the core frame and is tightly connected to the foam cushion body, thereby achieving seamless bonding and close cooperation between the core frame and the foam cushion body. After the core frame is wrapped, it is not easy for the user to bump into it, making it safer to use. At the same time, it is not easy to be damaged during transportation. The core frame and the foam cushion body are not easy to separate or delaminate, nor are they easy to be damaged. The core frame itself is not easy to fall apart. The core frame can be completely buried in the foam cushion body, so that the integrity is better and the strength is better. The bottom of the chair seat that is folded and stood up is also wrapped with soft materials for greater safety. Alternatively, the side and top parts can be buried in the foam body, leaving only the bottom flush with the foam cushion body. This makes it easy to find the installation position during later installation, and also avoids the core frame protruding from the soft cushion body to form a safety hazard.

[0020] 2. The overall appearance of this application is simple, safe to use, has good structural stability, is not easy to damage, and is also a good protection for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the half-section structure of the foam cushion body and the core frame of the present application;

[0023] Figure 2 It is a schematic diagram of the core frame and chair back frame structure of the present application;

[0024] Figure 3 It is a schematic diagram of the back structure of the foam cushion body;

[0025] Figure 4 It is a schematic diagram of the structure of the present application with a protrusion;

[0026] Figure 5 It is a schematic diagram of the structure in which the bottom support part is a sheet or a plate;

[0027] Figure 6 It is a schematic diagram of the structure in which the bottom support part is a mesh plate or a belt body;

[0028] Figure 7 This is a cross-sectional view of the foam pad structure;

[0029] Figure 8 It is a schematic diagram of a structure in which the bottom support part and the front support part are a slat structure;

[0030] Fig. 9It is a structural schematic diagram in which the armrest and the chair back frame are separately connected. DETAILED DESCRIPTION

[0031] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0032] Embodiment 1:

[0033] A wheelchair seat structure includes a foam cushion body 1 and a core frame 2 buried in the foam cushion body 1. Taking the sitting position of a human body when the foam cushion body 1 is used as a reference, the front of the human body is the front side and the back of the human body is the back side. The core frame 2 at least includes a front support part 21 located at the front side, side support parts 22 located on both sides and a bottom support part 23 located at the center of the core frame 2. The front support part 21 extends along the two side directions of the foam cushion body 1, and the side support parts 22 extend along the front and rear directions of the foam cushion body 1. The front support part 21 and the side support parts 22 are continuous support components or point support components arranged in gaps. At least the outer peripheral edge and the top of the core frame 2 are buried in the foam cushion body 1.

[0034] The seat core frame 2 of the present application is wrapped in the foam cushion body 1, that is, before the seat cushion is foamed, the core frame 2 can be pre-set and then the foaming material can be poured in for foaming. During the foaming process, the foam cushion body 1 wraps the core frame 2 and is tightly connected to the foam cushion body 1, thereby realizing seamless bonding and tight cooperation between the core frame 2 and the foam cushion body 1. After the core frame 2 is wrapped, it is not easy for the user to bump into it, which makes it safer to use. At the same time, it is not easy to be damaged during transportation. The core frame 2 and the foam cushion body 1 are not easy to separate or delaminate, nor are they easy to be damaged. The core frame 2 itself is not easy to fall apart. The core frame 2 can be completely buried in the foam cushion body 1, so that the integrity is better and the strength is better. The bottom of the seat that is folded and stood up is also wrapped with soft materials for greater safety. It can also be that the side and top are buried in the foam body, leaving only the bottom flush with the foam cushion body 1 and visible. It is easy to find the installation position during the later installation, and it also avoids the core frame 2 protruding from the soft cushion body to form a safety hazard.

[0035] In order to ensure the main supporting and shaping outer contour of the foam pad body 1 on the front and both sides during design, the core frame 2 has at least a front supporting portion 21 corresponding to the front side of the foam pad body 1 and side supporting portions 22 corresponding to the two sides. Of course, the bottom at the center must be supported by a bottom supporting portion 23. The rear side is generally not subject to much force near the root of the chair backrest and will not collapse on the rear side because the middle and two parts are supported. Therefore, the rear side can be filled with only the foam pad body 1, and the rear side is also more elastic and has more force buffering space. Of course, a rear supporting portion can also be provided on the rear side of the core frame 2.

[0036] Embodiment 2:

[0037] The difference from the above embodiment is that the front support part 21 and the side support part 22 are continuous tubes or plates. The front support part 21 can be an integrated continuous plate or tube, so that the overall structure is simple and easy to produce. When it is a plate structure, it can be a plate structure integrated with the bottom support part 23, or it can be a strip plate structure connected to the bottom support part 23 by a connecting rod. Of course, it is not excluded that the point support components are arranged in gaps as in the above embodiment, that is, small support components can be arranged one by one along the front edge and both sides of the foam pad body 1 to ensure that the front edge and the edges on both sides have sufficient support.

[0038] Embodiment three:

[0039] The difference from the above embodiment is that the bottom support part 23 is a rigid tube or plate structure, or a flexible sheet or belt structure, or a structure of a combination of rigid material and flexible material. The structure of the bottom support part 23 can be formed by connecting the tubes, or an integrally formed plate structure, or a mesh plate or flexible net structure, or a flexible sheet such as a cloth sheet with mesh holes, or a belt structure connected to the side support part 22 and / or the front support part 21. Of course, it can also be partially made of rigid material such as steel pipes, and partially made of flexible belts or sheets connected between steel pipes.

[0040] Embodiment 4:

[0041] The difference from the above embodiment is that the front support part 21 and the side support parts 22 on both sides of the present application are continuous curved pipes connected in sequence, and the bottom support part 23 is a connecting pipe connected between the side support parts 22 on both sides. In this embodiment, the core frame 2 can be entirely composed of simple and high-strength pipes, so that the structure is simple, the strength is high, and the cost is low.

[0042] A reinforcement stopper 24 is provided between the connecting tubes and / or between the connecting tubes and the front support 21 along the forward direction of the seat. The front support 21 and the bottom support 23 are connected between the side support 22, thereby having a good restraining and limiting effect on the foam cushion body 1 from the front to the back and upward direction. In the left and right directions, only the relatively far side support 22 is limited, so a reinforcement stopper 24 arranged in the front and back direction can be provided in the middle of the core frame 2, thereby further limiting and reinforcing the foam cushion body 1 from the left and right directions.

[0043] Embodiment five:

[0044] The difference from the above embodiment is that the outer surface of the core frame 2 is provided with a protrusion 3 for increasing the gripping force with the foam cushion body 1, and the protrusion 3 is provided at the bottom or side of the core frame 2; and / or the outer surface of the core frame 2 is a rough surface. The protrusion 3 can be square, conical or other shapes. During long-term use of a wheelchair, the seat cushion will also shift due to usage habits, and during the foaming process, the smooth core frame 2 structure may also have insufficient adhesion and be easily detached from the foam cushion body 1. In this embodiment, protrusions 3 can be appropriately added to the surface of the core frame 2 or the roughness of the surface of the core frame 2 can be increased to increase the connection strength between the core frame 2 and the foam cushion body.

[0045] Embodiment six:

[0046] The difference from the above-mentioned embodiment is that the rear end of the core frame 2 is detachably connected to a seat component, and the seat component includes a connector 4 and a chair back frame 5. The connector 4 is provided with a socket 41 or a plug, and the chair back frame 5 is inserted into or sleeved on the socket or the plug. A plug or a socket can be provided on the chair back frame 5, and a corresponding socket or plug for docking can be provided on the connector 4. The plug can be a solid tube rod or a hollow structure. The chair back frame 5 of the present application adopts a detachable and simple plug-in method, so it can be directly removed and packaged when leaving the factory. According to the actual packaging effect and data statistics of the actual factory delivery, the packaging volume can be reduced by 30% by using the packaging of the present application with the chair back frame 5 removed.

[0047] A detachable armrest 6 is also provided between the rear end of the core frame 2 and the connector 4. All existing wheelchairs on the market have armrests 6, and normal armrests 6 are connected between the seat and the backrest. The backrest frame 5 of the present application is simple and pluggable. To ensure the ease of installation of other components, the present application connects the armrest 6 between the rear end of the core frame 2 and the connector 4, which is easy to operate and has good stability.

[0048] Embodiment seven:

[0049] The difference from the above embodiment is that the back end of the core frame is plugged with a chair back frame 5, and the back end of the chair back frame 5 or the back end of the core frame is connected with an armrest 6. The armrest can be connected only to the chair back frame or only to the core frame, so that the structure is simple and easy to install, which matches the structure of convenient plugging between the chair back frame and the core frame.

[0050] Embodiment eight:

[0051] The difference from the above embodiment is that the foam cushion body 1 is provided with a plurality of through holes 11 that penetrate the foam cushion body 1 from top to bottom. The through holes 11 can be used as ventilation holes, which are more comfortable to use. A seat cushion cover 12 can be detachably mounted on the outside of the foam cushion body 1, which is convenient for cleaning on the one hand, and can further improve the integrity on the other hand, making it more beautiful and safer to use. The aperture of the through hole 11 gradually increases from top to bottom. The design of the through hole 11 being small at the top and large at the bottom can ensure the ventilation volume while ensuring that the position of the through hole 11 is not easy to collapse, and the service life is long. The upper part of the through hole 11 will not expand due to long-term pressure to form an easy-to-tear opening.

[0052] Embodiment nine:

[0053] The difference from the above embodiment is that the outer mounting hole position of the core frame 2 in the foam cushion body 1 is detachably provided with a positioning member 7, the inner end of the positioning member 7 abuts against or connects to the outer mounting hole of the core frame 2, and the outer end penetrates the foam cushion body 1 or is arranged near the outer surface of the foam cushion body 1. Whether it is a traditional seat frame or the core frame 2 buried in the foam cushion body 1 of the present application, it needs to be installed with other structures of the wheelchair after processing, so there will be some mounting holes or external mounting parts on the core frame 2. For the standard, it is generally placed on the installation equipment even if the mounting hole is not visible, and a hole position can be quickly found. Therefore, most of the mounting holes can be ensured to be installed normally without wrapping. However, some deviations may occur occasionally, and the corresponding foam cushion body 1 may need to be punched through during installation. When the foam cushion body 1 is punched through, the holes of the foam cushion body 1 may be irregular or the edges may be damaged. The positioning member 7 is preset at the mounting hole position of the present application, so that the mounting position or mounting hole of the core frame 2 can be accurately found from the appearance after the foaming of the foam cushion body 1 is completed. The positioning member 7 can be a solid member that is easy to remove, or a pipe member.

[0054] The positioning member 7 includes a soft outer sleeve 71 and a hard detachable support member 72 inserted in the positioning member 7. The support member 72 can play a shaping role, so that the installation position or installation hole of the foaming core frame 2 is not blocked by the foaming extrusion, and the outer sleeve 71 can be supported. Due to the setting of the soft outer sleeve 71, the support member 72 can be easily taken out after the foaming is completed, and the connecting member 4 such as the screw can be directly inserted into the outer sleeve 71 to install the core frame 2. Since the outer sleeve 71 is soft, it can be squeezed and deformed during installation, so that the installation of the core frame 2 will not be affected, and the foam pad body 1 is regular and beautiful in shape at the position of the outer sleeve 71. There will be no installation misalignment, and the installation is convenient.

[0055] Embodiment ten:

[0056] The difference from the above-mentioned embodiment lies in that a recessed groove 8 for exposing part or all of the installation part is provided on the foam cushion body 1; generally, the bottom of the seat is connected to a handle of a foldable wheelchair, so a protruding external connection piece or an external connection piece connected to other parts of the wheelchair is provided on the core frame 2. In order to ensure that the core frame 2 is wrapped as much as possible as well as to ensure that the external connection pieces on the core frame 2 can be easily installed, some recessed grooves 8 can be provided on the foam cushion body 1 to expose the above-mentioned external connection for the convenience of later installation.

[0057] The seat core frame 2 of the present application is wrapped in the foam cushion body 1, that is, before the seat cushion is foamed, the core frame 2 can be pre-set and then the foaming material can be poured in for foaming. During the foaming process, the foam cushion body 1 wraps the core frame 2 and is tightly connected to the foam cushion body 1, thereby realizing seamless bonding and tight cooperation between the core frame 2 and the foam cushion body 1. After the core frame 2 is wrapped, it is not easy for the user to bump into it, which makes it safer to use. At the same time, it is not easy to be damaged during transportation. The core frame 2 and the foam cushion body 1 are not easy to separate or delaminate, nor are they easy to be damaged. The core frame 2 itself is not easy to fall apart. The core frame 2 can be completely buried in the foam cushion body 1, so that the integrity is better and the strength is better. The bottom of the seat that is folded and stood up is also wrapped with soft materials for greater safety. It can also be that the side and top are buried in the foam body, leaving only the bottom flush with the foam cushion body 1 and visible. It is easy to find the installation position during the later installation, and it also avoids the core frame 2 protruding from the soft cushion body to form a safety hazard. The overall appearance of the present invention is simple, safe to use, has good structural stability, is not easy to damage, and also provides good protection for users.

Claims

1. A wheelchair seat structure, characterized in that: The invention comprises a foam cushion body (1) and a core frame (2) buried in the foam cushion body, with the front of the human body being the front side and the back of the human body being the back side, based on the human body's sitting position when the foam cushion body is used. The core frame at least comprises a front support part (21) located at the front side, side support parts (22) located at both sides and a bottom support part (23) located at the center of the core frame. The front support part is extended along both sides of the foam cushion body (1), and the side support part (22) is extended along the front and rear directions of the foam cushion body (1). The front support part and the side support part are continuous support parts or point support parts arranged in gaps. At least the outer peripheral edge and the top of the core frame (2) are buried in the foam cushion body.

2. A wheelchair seat structure according to claim 1, characterized in that: The front support part and the side support part are continuous tubes or plates; the bottom support part is a rigid tube or plate structure, or a flexible sheet or belt structure, or a structure composed of rigid material and flexible material.

3. A wheelchair seat structure according to claim 1, characterized in that: A chair back frame (5) is inserted at the rear end of the core frame, and an armrest (6) is connected to the chair back frame (5) or the rear end of the core frame.

4. A wheelchair seat structure according to claim 1 or 2, characterized in that: The front support part and the side support parts on both sides are continuous curved pipes connected in sequence, and the bottom support part is a connecting pipe connected between the side support parts on both sides.

5. A wheelchair seat structure according to claim 4, characterized in that: A reinforcement stopper (24) is provided between the connecting pipes and / or between the connecting pipe and the front support portion along the forward direction of the seat.

6. The wheelchair seat structure according to claim 1, characterized in that: The outer surface of the core frame is provided with a protrusion (3) for increasing the gripping force with the foam pad, and the protrusion is arranged at the bottom or side of the core frame; and / or the outer surface of the core frame is a rough surface.

7. The wheelchair seat structure according to claim 1, characterized in that: The rear end of the core frame is detachably connected to a seat component, the seat component comprising a connecting piece (4) and a seat back frame (5), the connecting piece is provided with a plug hole (41) or a plug pipe, and the seat back frame is inserted into or sleeved on the plug hole or the plug pipe.

8. The wheelchair seat structure according to claim 1, characterized in that: The foam cushion body (1) is provided with a plurality of through holes (11) penetrating the foam cushion body from top to bottom, and the diameters of the through holes gradually increase from top to bottom.

9. The wheelchair seat structure according to claim 1, characterized in that: A positioning piece (7) is detachably provided in the foam pad body at the external mounting hole position corresponding to the core frame, and / or a recess (8) is provided on the foam pad body for exposing part or all of the mounting position; the inner end of the positioning piece abuts against or connects to the external mounting hole of the core frame, and the outer end passes through the foam pad body or is arranged close to the outer surface of the foam pad body.

10. A wheelchair seat structure according to claim 9, characterized in that: The positioning member (7) comprises a soft outer sleeve (71) and a hard, detachable supporting member (72) inserted into the positioning member.

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