Armrest structure and wheelchair

Abstract

The armrest structure comprises armrest parts and guide parts, the armrest parts are arranged to be distributed in the first direction, the guide parts are connected with the armrest parts, and the guide parts are arranged to be distributed in the second direction; the connecting pipe comprises an unfolding groove and a containing groove, the connecting pipe is configured to be used for containing a part of the structure of the guiding piece, the unfolding groove is formed in one side of the containing groove and communicates with the containing groove, and the unfolding groove extends in the containing groove in the axial direction of the connecting pipe, so that when the guiding piece is located in the unfolding groove, the handrail piece is in an unfolding state; and when the guide piece moves from the unfolding groove to the storage groove, the armrest piece is in a storage state. In the whole process, the armrest piece can be unfolded, and the armrest structure can be combined with the bed body of the wheelchair after the armrest piece is switched from the unfolded state to the folded state, so that the completeness of the bed surface is ensured after the combination, and meanwhile, the personal safety can be ensured.

Description

Technical Field

[0001] The present application relates to the technical field of armrests, and in particular to an armrest structure and a wheelchair. Background Art

[0002] Wheelchairs generally provide a means of moving from one area to another for individuals who are injured, ill, or otherwise unable to walk autonomously. In some cases, such individuals, particularly those in nursing homes, may spend most of their time each day in a wheelchair. In some cases, it is often important from a therapeutic perspective to provide comfort and support when these individuals are in a wheelchair for a long time. In order to avoid fatigue, numbness, and general discomfort, wheelchairs are designed to provide comfort and support to the lower body, back, and upper body of an individual, such as the arms. Specifically, for suitable arm support and comfort, it is important to provide appropriately positioned armrests connected to the wheelchair.

[0003] In the relevant technology, the wheelchair bed has two working states, one is the wheelchair state, and the other is the wheelchair and bed integrated state. However, when the wheelchair and the bed are combined, the armrests will interfere with the bed body, the integrity of the bed surface is poor, and there may be safety hazards. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide an armrest structure and a wheelchair, wherein the armrest structure can be hidden and unfolded, and when the armrest structure is combined with the bed of the wheelchair, the integrity of the bed surface can be ensured, while also ensuring personal safety.

[0005] In a first aspect, an embodiment of the present application provides an armrest structure, comprising: an armrest mechanism, comprising an armrest member and a guide member, the armrest member being configured to be distributed along a first direction, the guide member connecting the armrest member, and the guide member being configured to be distributed along a second direction; a connecting tube, comprising an expansion groove and a storage groove, the connecting tube being configured to accommodate a partial structure of the guide member, the expansion groove being arranged on one side of the storage groove and being connected to the storage groove, the expansion groove extending axially along the connecting tube at the storage groove, so that when the guide member is located in the expansion groove, the armrest member is in an expanded state, and when the guide member moves from the expansion groove to the storage groove, the armrest member is in a storage state.

[0006] In the above-mentioned implementation process, the guide member is connected to the armrest member, and the connecting tube is provided with an expansion groove and a storage groove. The expansion groove is connected with the storage groove, and the guide member is arranged inside the connecting tube. When the armrest member needs to be expanded, part of the structure of the guide member is exposed in the storage groove, and the storage groove limits the guide member. The operator moves the armrest member and the guide member together until the part of the structure of the guide member is located at the expansion groove, and rotates the armrest member. The part of the structure of the guide member is engaged with the expansion groove. After the armrest member is expanded, the expansion groove limits the guide member. The whole process can not only expand the armrest member, but also switch the armrest member from the expanded state to the storage state. Only then can the armrest structure be combined with the bed of the wheelchair, so that the integrity of the bed surface is guaranteed after the combination, and personal safety can also be ensured.

[0007] In some embodiments, the storage slot includes a storage portion and a limiting portion, the limiting portion is arranged on a side of the storage portion away from the unfolding slot, the limiting portion is connected to the storage portion, and when the armrest member is in the storage state, the limiting portion is configured to limit the guide member.

[0008] In some embodiments, the guide member includes a guide column and a limit column, the limit column is connected to the guide column, the limit column is located on the side of the guide column away from the armrest member, and the limit column is configured in the expansion slot or the storage slot.

[0009] In the above-mentioned implementation process, the limit column is connected to the guide column, and the guide column is assembled inside the connecting tube. When the armrest needs to be switched to the expanded state, the limit column moves to the expansion slot along with the guide column, and the expansion slot limits the limit column to ensure the stability of the armrest after expansion. When the armrest needs to be switched to the storage state, the limit column moves to the storage slot along with the guide column, and the storage slot limits the limit column to ensure the stability of the armrest after storage, which is beneficial to the subsequent combination of the armrest structure and the bed body, ensuring the integrity of the bed surface after combination, and also ensuring personal safety.

[0010] In some embodiments, the guide member also includes a fixing body, the guide column is provided with a mounting hole, the mounting hole is configured to accommodate the limiting column, a portion of the structure of the limiting column is exposed from the mounting hole, and the fixing body is configured to be used for the limiting column.

[0011] In the above implementation process, the limit column is assembled in the mounting hole of the guide column and fixed by the fixing body, which can ensure that the limit column is snap-connected with the expansion slot or the storage slot, and when the armrest needs to be disassembled, it is only necessary to remove the fixing body from the guide column to meet the usage needs of different users.

[0012] In some embodiments, the armrest structure further includes a first friction reducing member, which is connected to the connecting tube. The first friction reducing member is passed through a side of the guide member away from the armrest member and extends to the interior of the connecting tube.

[0013] In the above-mentioned implementation process, the first friction-reducing member is connected to the connecting tube, and the guide member passes through the first friction-reducing member and extends to the inside of the connecting tube, which can reduce the friction generated by the guide member moving inside the connecting tube. The guide member moves more smoothly, which is conducive to the switching between the unfolded state and the stowed state of the armrest member, and can also avoid the generation of noise during the movement process.

[0014] In some embodiments, the handrail structure further includes a second friction reducing member, the second friction reducing member is sleeved on the guide member, and the second friction reducing member is configured inside the connecting tube.

[0015] In the above-mentioned implementation process, the second friction-reducing member is connected to the guide member, and both the second friction-reducing member and the guide member are located inside the connecting tube, which can reduce the friction generated by the guide member moving inside the connecting tube. The guide member moves more smoothly, which is conducive to the switching between the unfolded state and the stowed state of the armrest member, and can also avoid the generation of noise during the movement process.

[0016] In some embodiments, the armrest structure further includes an adjusting member, which is connected to the armrest member to adjust the position of the armrest member relative to the guide member.

[0017] In some embodiments, two of the armrests are configured, wherein one of the armrests is connected to one side of the guide member, and the other armrest is connected to the other side of the guide member.

[0018] In some embodiments, there are one or more connecting tubes, and when there is one connecting tube, there are two expansion grooves and two receiving grooves, the two receiving grooves are spaced apart along the second direction, and the two receiving grooves are each provided with the expansion groove along the side away from each other.

[0019] In a second aspect, the present application also provides a wheelchair, comprising: a backrest plate provided with a connecting surface; and an armrest structure as described in any one of the above items, wherein a connecting tube of the armrest structure is connected to the connecting surface, and when the armrest member of the armrest structure is in a stored state, the armrest member is located on a side of the backrest plate close to the connecting surface, and when the armrest member switches from the stored state to the deployed state, the armrest member extends along a side of the backrest plate away from the connecting surface.

[0020] In the above-mentioned implementation process, the backrest is configured with a connecting surface, and the connecting tube is connected to the connecting surface, so that after the armrest member of the armrest mechanism is connected to the connecting tube, the armrest member can be unfolded or stored relative to the backrest during the movement inside the connecting tube, which is convenient for the user to meet their functional needs. At the same time, after the armrest structure is combined with the bed of the wheelchair, the integrity of the bed surface can be guaranteed, and personal safety can also be ensured.

[0021] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of the handrail provided in the embodiment of the present application;

[0025] Figure 2 A partial structural schematic diagram of the handrail structure provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the structure of the connecting pipe of the handrail structure provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the partial structure of a wheelchair provided in an embodiment of the present application.

[0028] Reference numerals

[0029] 100, armrest mechanism; 101, armrest member; 102, guide member; 1021, guide column; 1022, limit column; 1023, fixed body; 103, adjustment member; 104, first friction reducing member; 105, second friction reducing member; 200, connecting pipe; 201, unfolding slot; 202, storage slot; 2021, storage part; 2022, limit part; 300, back plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0031] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0032] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0033] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0035] Example

[0036] Common wheelchair armrests and wheelchair armrests on the market are usually rotating storage structures, plug-in structures and vertical pull-out structures; among them, when the rotating storage structure and the vertical pull-out structure are used on light wheelchairs, the integrity of the bed surface is not strong when the bed and chair are combined, and if the armrests are not stored in place at this time, it may cause damage to the patient's body; when the plug-in structure is used on the wheelchair, the armrests need to be manually plugged in and out during the process of getting in and out of the bed, causing inconvenience to the user, and there is no armrest protection during the process of getting in and out of the bed, and the patient is at risk of falling.

[0037] In view of this, if Figure 1-Figure 4 As shown, in the first aspect, an embodiment of the present application provides an armrest structure, comprising: an armrest mechanism 100, comprising an armrest member 101 and a guide member 102, the armrest member 101 being configured to be distributed along a first direction, the guide member 102 being connected to the armrest member 101, and the guide member 102 being configured to be distributed along a second direction; a connecting tube 200, comprising an expansion slot 201 and a storage slot 202, the connecting tube 200 being configured to accommodate a partial structure of the guide member 102, the expansion slot 201 being arranged on one side of the storage slot 202 and being communicated with the storage slot 202, the expansion slot 201 extending along the axial direction of the connecting tube 200 at the storage slot 202, so that when the guide member 102 is located in the expansion slot 201, the armrest member 101 is in an expansion state, and when the guide member 102 moves from the expansion slot 201 to the storage slot 202, the armrest member 101 is in a storage state.

[0038] Exemplarily, the first direction includes but is not limited to the left and right direction, and the first direction and the second direction can be set vertically or along a preset angle, such as 0° to 90° or 90° to 180°, etc.; the armrest member 101 is connected to the guide member 102, and the guide member 102 is adapted to the connecting tube 200, wherein the guide member 102 can rotate relative to the horizontal center line of the connecting tube 200, and the direction of the horizontal center line of the connecting tube 200 can be configured to be consistent with the second direction, for example, both are front and back directions, so that when the armrest member 101 rotates relative to the connecting tube 200 through the guide member 102, the armrest member 101 can be realized in an expanded state or a stored state.

[0039] In the above implementation process, the guide member 102 is connected to the handrail member 101, and the connecting tube 200 is provided with an unfolding groove 201 and a receiving groove 202. The unfolding groove 201 is communicated with the receiving groove 202. The guide member 102 is arranged inside the connecting tube 200. When the handrail member 101 needs to be unfolded, part of the structure of the guide member 102 is exposed in the receiving groove 202. The receiving groove 202 limits the guide member 102. The operator moves the handrail member 101 and the guide member 102 together until This part of the structure of the guide member 102 is located at the unfolding groove 201. When the armrest member 101 is rotated, this part of the structure of the guide member 102 is snapped into the unfolding groove 201. After the armrest member 101 is unfolded, the unfolding groove 201 limits the guide member 102. The whole process can not only unfold the armrest member 101, but also switch the armrest member 101 from the unfolded state to the stowed state before the armrest structure can be combined with the bed of the wheelchair, so that the integrity of the bed surface is guaranteed after the combination, and personal safety can also be ensured at the same time.

[0040] like Figure 1-Figure 2 The storage groove 202 includes a storage portion 2021 and a limiting portion 2022. The limiting portion 2022 is arranged on the side of the storage portion 2021 away from the unfolding groove 201. The limiting portion 2022 is connected to the storage portion 2021, and when the armrest member 101 is in the storage state, the limiting portion 2022 is configured to limit the guide member 102.

[0041] Exemplarily, the receiving portion 2021 and the limiting portion 2022 are both configured to be connected to the interior of the connecting tube 200, and the receiving portion 2021 and the limiting portion 2022 can be configured to be distributed along the second direction, and the length of the receiving portion 2021 can be set according to the length of the connecting tube 200, and the length of the limiting portion 2022 can be set according to the actual situation of the armrest 101, and after the receiving portion 2021 and the limiting portion 2022 are connected, a “Z "; It should be noted that, in order to improve the stability of the armrest 101 when it is in the stored state, a notch can be set in the limiting portion 2022. When the limiting column 1022 of the guide member 102 moves to the limiting portion 2022 and is at the notch, the limiting column 1022 can be limited in the left and right directions. When the armrest 101 needs to be switched to the expanded state, it only needs to separate the limiting column 1022 from the notch and move it into the expansion slot 201. The operation is convenient and the stability is reliable.

[0042] In some embodiments, the guide member 102 includes a guide column 1021 and a limiting column 1022, the limiting column 1022 is connected to the guide column 1021, the limiting column 1022 and the guide column 1021 can be fixedly connected or detachably connected, the limiting column 1022 is located on the side of the guide column 1021 away from the armrest member 101, and the limiting column 1022 is configured in the expansion slot 201 or the storage slot 202.

[0043] In the above-mentioned implementation process, the limit column 1022 is connected to the guide column 1021, and the guide column 1021 is assembled inside the connecting tube 200. When the armrest 101 needs to be switched to the expanded state, the limit column 1022 moves to the expansion slot 201 along with the guide column 1021, and the expansion slot 201 limits the limit column 1022 to ensure the stability of the armrest 101 after expansion. When the armrest 101 needs to be switched to the storage state, the limit column 1022 moves to the storage slot 202 along with the guide column 1021, and the storage slot 202 limits the limit column 1022 to ensure the stability of the armrest 101 after storage, which is beneficial to the subsequent combination of the armrest structure and the bed body, ensuring the integrity of the bed surface after combination, and also ensuring personal safety.

[0044] like Figure 2 As shown, the guide member 102 also includes a fixing body 1023, which includes but is not limited to a screw, and the guide column 1021 is provided with a mounting hole, which is configured to accommodate the limiting column 1022, a portion of the structure of the limiting column 1022 is exposed from the mounting hole, and the fixing body 1023 is configured to be used for the limiting column 1022.

[0045] In the above-mentioned implementation process, the limit column 1022 is assembled in the mounting hole of the guide column 1021 and fixed by the fixing body 1023, which can ensure that the limit column 1022 is snap-connected with the expansion slot 201 or the storage slot 202, and when the armrest 101 needs to be disassembled, it is only necessary to remove the fixing body 1023 from the guide column 1021 to meet the usage requirements of different users.

[0046] Please refer to Figure 2 The armrest structure also includes a first friction reducing member 104, which includes but is not limited to an oil-free bushing. The first friction reducing member 104 is connected to the connecting pipe 200, and the first friction reducing member 104 is penetrated by the side of the guide member 102 away from the armrest member 101 and extends to the interior of the connecting pipe 200.

[0047] In the above-mentioned implementation process, the first friction reducing member 104 is connected to the connecting tube 200, and the guide member 102 passes through the first friction reducing member 104 and extends to the inside of the connecting tube 200, which can reduce the friction generated by the guide member 102 moving inside the connecting tube 200. The guide member 102 moves more smoothly, which is conducive to the switching between the unfolded state and the stored state of the armrest member 101, and can also avoid the generation of noise during the movement process.

[0048] In some embodiments, the armrest structure also includes a second friction reducer 105, which includes but is not limited to an oil-free bushing, and the second friction reducer 105 is sleeved on the guide member 102, and the second friction reducer 105 is configured inside the connecting tube 200; it should be noted that when the guide column 1021 is sleeved with the first friction reducer 104 and the second friction reducer 105, the second friction reducer 105 is located on the side of the first friction reducer 104 away from the armrest member 101, and the second friction reducer 105 can move together with the guide column 1021.

[0049] In the above-mentioned implementation process, the second friction reducing member 105 is connected to the guide member 102. The second friction reducing member 105 and the guide member 102 are both located inside the connecting tube 200, which can reduce the friction generated by the guide member 102 moving inside the connecting tube 200. The guide member 102 moves more smoothly, which is conducive to the switching between the unfolded state and the stowed state of the armrest member 101, and can also avoid the generation of noise during the movement process.

[0050] In some embodiments, the armrest structure further includes an adjusting member 103 , and the adjusting member 103 includes but is not limited to an adjusting bolt. The adjusting member 103 is connected to the armrest member 101 to adjust the position of the armrest member 101 relative to the guide member 102 .

[0051] In some embodiments, two armrest members 101 are configured, wherein one armrest member 101 is connected to one side of the guide member 102 , and the other armrest member 101 is connected to the other side of the guide member 102 .

[0052] In some embodiments, the connecting tube 200 is configured with one or more, and when the connecting tube 200 is one, the expansion groove 201 and the storage groove 202 are each configured with two, the two storage grooves 202 are spaced apart along the second direction, and the two storage grooves 202 are each configured with the expansion groove 201 along the side away from each other.

[0053] like Figure 3As shown, in a second aspect, the present application further provides a wheelchair, comprising: a backrest 300, provided with a connecting surface; and an armrest structure as described above, wherein the connecting tube 200 of the armrest structure is connected to the connecting surface, and when the armrest member 101 of the armrest structure is in a stored state, the armrest member 101 is located on a side of the backrest 300 close to the connecting surface, and when the armrest member 101 switches from the stored state to the deployed state, the armrest member 101 extends along a side of the backrest 300 away from the connecting surface.

[0054] In the above-mentioned implementation process, the backrest 300 is configured with a connecting surface, and the connecting tube 200 is connected to the connecting surface, so that after the armrest member 101 of the armrest mechanism 100 is connected to the connecting tube 200, the armrest member 101 can be unfolded or stored relative to the backrest 300 during the movement inside the connecting tube 200, which is convenient for users to meet their functional needs. At the same time, after the armrest structure is combined with the bed of the wheelchair, the integrity of the bed surface can be guaranteed, and personal safety can also be ensured.

[0055] In all the embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms are not elaborated in the embodiments of the present application.

[0056] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0057] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0058] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A handrail structure, characterized in that: include: An armrest mechanism, comprising an armrest member and a guide member, wherein the armrest member is arranged to be distributed along a first direction, the guide member is connected to the armrest member, and the guide member is arranged to be distributed along a second direction; A connecting tube, comprising an expansion groove and a receiving groove, wherein the connecting tube is configured to accommodate a partial structure of the guide member, wherein the expansion groove is configured on one side of the receiving groove and is communicated with the receiving groove, wherein the expansion groove extends axially along the connecting tube at the receiving groove, so that when the guide member is located in the expansion groove, the armrest member is in an expansion state, and when the guide member moves from the expansion groove to the receiving groove, the armrest member is in a receiving state.

2. The handrail structure according to claim 1, characterized in that: The storage slot includes a storage portion and a limiting portion, the limiting portion is arranged on a side of the storage portion away from the unfolding slot, the limiting portion is connected to the storage portion, and when the armrest is in the storage state, the limiting portion is configured to limit the guide member.

3. The handrail structure according to claim 1, characterized in that: The guide member includes a guide column and a limiting column, the limiting column is connected to the guide column, the limiting column is located on a side of the guide column away from the armrest member, and the limiting column is configured in the unfolding slot or the receiving slot.

4. The handrail structure according to claim 3, characterized in that: The guide member also includes a fixing body, the guide column is provided with a mounting hole, the mounting hole is configured to accommodate the limiting column, a part of the structure of the limiting column is exposed in the mounting hole, and the fixing body is configured to be used for the limiting column.

5. The handrail structure according to claim 1, characterized in that: The armrest structure further includes a first friction reducing member, which is connected to the connecting tube. The first friction reducing member is penetrated through a side of the guide member away from the armrest member and extends to the interior of the connecting tube.

6. The handrail structure according to claim 1 or 5, characterized in that: The handrail structure further includes a second friction reducing member, which is sleeved on the guide member and is disposed inside the connecting pipe.

7. The handrail structure according to claim 1, characterized in that: The armrest structure also includes an adjusting member, which is connected to the armrest member to adjust the position of the armrest member relative to the guide member.

8. The handrail structure according to claim 1, characterized in that: The armrests are configured with two, one of which is connected to one side of the guide member, and the other is connected to the other side of the guide member.

9. The handrail structure according to claim 1 or 8, characterized in that: The connecting tube is configured with one or more than one, and when the connecting tube is configured with one, the expansion groove and the storage groove are configured with two each, the two storage grooves are spaced apart along the second direction, and the expansion groove is configured along the side of the two storage grooves away from each other.

10. A wheelchair, characterized in that: include: A back plate configured with a connection surface; and According to the handrail structure as described in any one of claims 1 to 9, the connecting tube of the handrail structure is connected to the connecting surface, and when the handrail member of the handrail structure is in a stowed state, the handrail member is located on a side of the backrest plate close to the connecting surface, and when the handrail member is switched from the stowed state to the deployed state, the handrail member extends along a side of the backrest plate away from the connecting surface.

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