Rehabilitation training ladder

Abstract

The utility model discloses a rehabilitation training ladder which comprises at least one ladder assembly and a driving assembly connected with the at least one ladder assembly. When the driving assembly pushes the connected step assemblies in the first direction, all the step assemblies are unfolded to be in a step shape. When the driving assembly pulls the connected step assemblies in the second direction, all the step assemblies are folded into a stacked shape. According to the folding type rehabilitation training ladder, the rehabilitation training ladder is optimized, all ladder assemblies can be folded into a laminated shape, and compared with an existing rehabilitation training ladder which is folded into a flat plate shape, the folded rehabilitation training ladder is smaller in occupied space and convenient to store.

Description

Technical Field

[0001] The utility model relates to the technical field of rehabilitation medical devices, and particularly relates to a rehabilitation training ladder. Background Art

[0002] Due to diseases such as stroke, hemiplegia, and / or spinal cord injury causing nerve damage to patients, during the treatment period, it is necessary to use a rehabilitation training ladder to train the legs, waist, and upper limbs of the patients, improve the balance control ability of the patients, and restore or partially restore their motor functions. It is widely used. Therefore, it is particularly necessary to optimize the structure of the rehabilitation training ladder.

[0003] The existing rehabilitation training ladder is composed of several pedals, and all the pedals are distributed in a stepped shape. Usually, all the pedals of most rehabilitation training ladders are fixedly arranged and cannot be folded, occupying a large space and being inconvenient to store. Although a few pedals of the rehabilitation training ladder can be folded, limited by the existing technology, all the pedals are commonly connected to a hinge beam, and by changing the posture of the hinge beam, all the pedals are unfolded into a stepped shape or folded into a flat shape. However, the occupied space of this type of rehabilitation training ladder after folding is still large and the storage is still inconvenient. Content of the Utility Model

[0004] The purpose of the utility model is to provide a rehabilitation training ladder, in which all the ladder components are folded into a stacked state, occupying less space and being convenient to store, and solving the technical problem of inconvenient storage caused by the excessive occupied space of the existing rehabilitation training ladder.

[0005] To achieve the above purpose, the utility model provides a rehabilitation training ladder, which includes at least one group of ladder components and a driving component connected to at least one group of ladder components;

[0006] When the driving component pushes the connected ladder components along the first direction, all the ladder components are unfolded into a stepped shape;

[0007] When the driving component pulls the connected ladder components along the second direction, all the ladder components are folded into a stacked state.

[0008] Preferably, the ladder component includes a bottom-layer ladder component at the bottom layer, and the bottom-layer ladder component includes at least one bottom-layer step; the driving component includes:

[0009] A bidirectional screw rotatably arranged;

[0010] A first adjusting block and a second adjusting block respectively sleeved on two driving threads with different helix directions of the bidirectional screw;

[0011] A first driving rod hinged between the first adjusting block and the first end of the bottom-layer step;

[0012] A second driving rod hinged between the second adjusting block and the second end of the bottom step.

[0013] Preferably, a plurality of rolling wheels are provided at the bottom of the bottom step.

[0014] Preferably, the stepped assembly includes at least one set of linkage stepped assemblies sequentially stacked on the bottom stepped assembly. Each set of linkage stepped assemblies includes at least one linkage step. A mutually cooperating chute and slider are provided between the bottom step and an adjacent linkage step and between two adjacent linkage steps. A linkage block is fixedly provided in the chute; when two adjacent stepped assemblies slide relative to each other until the linkage block abuts against the slider, the linkage block is used to drive the two adjacent stepped assemblies to slide synchronously.

[0015] Preferably, anti-slip pads are fixedly provided on the tread surface of the bottom step and the tread surfaces of all the linkage steps.

[0016] Preferably, the bottom step and all the linkage steps are of a hollow structure; at least one reinforcing plate is fixedly provided at the center of the hollow structure.

[0017] Preferably, it further includes a support frame fixedly provided and slidably cooperating with the topmost linkage stepped assembly.

[0018] Preferably, a set of handrail assemblies are fixedly provided on the bottom step and all the linkage steps. Each handrail assembly includes two rotatably provided handrail rods; when all the stepped assemblies are in the unfolded state, the two handrail rods are perpendicular to the connected stepped assembly; when all the stepped assemblies are in the folded state, the two handrail rods are parallel to the connected stepped assembly.

[0019] Preferably, each handrail rod is telescopically provided.

[0020] Preferably, the bottom step and all the linkage steps are provided with a first limiting hole and a second limiting hole, and either the first limiting hole or the second limiting hole is selectively matched with a limiting rod provided on the handrail rod.

[0021] Compared with the background art, the rehabilitation training ladder provided by the present utility model includes at least one set of stepped assemblies and a driving assembly, and the driving assembly is connected to at least one set of stepped assemblies; when the driving assembly pushes the connected stepped assemblies in the first direction, all the stepped assemblies are unfolded into a ladder shape; when the driving assembly pulls the connected stepped assemblies in the second direction, all the stepped assemblies are folded into a stacked shape. The present utility model optimizes the rehabilitation training ladder, enables all the stepped assemblies to be folded into a stacked shape, and compared with the existing rehabilitation training ladder that is folded into a flat shape, the rehabilitation training ladder of the present utility model occupies less space after folding and is convenient for storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0023] Figure 1 Schematic diagram of the rehabilitation training ladder provided by the embodiment of the present invention in the unfolded state;

[0024] Figure 2 Schematic diagram of the rehabilitation training ladder provided by the embodiment of the present invention in the folded state;

[0025] Figure 3 For Figure 1 Device diagram of the bottom ladder component, drive component and support frame in

[0026] Figure 4 For Figure 1 Structure diagram of the bottom step in

[0027] Figure 5 For Figure 1 Exploded view of the handrail rod in

[0028] The reference numerals are as follows:

[0029] Ladder component 100, drive component 200, support frame 300 and handrail component 400;

[0030] Bottom ladder component 101, first linkage ladder component 102, second linkage ladder component 103, chute 104, slider 105, linkage block 106, anti-slip pad 107, reinforcement plate 108, first limit hole 109 and second limit hole 110;

[0031] Bottom step 1011 and rolling wheel 1012;

[0032] First linkage step 1021;

[0033] Second linkage step 1031;

[0034] Bidirectional screw 201, first adjustment block 202, second adjustment block 203, first drive rod 204, second drive rod 205 and drive motor 206;

[0035] Handrail rod 401 and limit rod 402;

[0036] Outer guide sleeve 4011, inner support rod 4012, limit screw 4013 and handrail block 4014. Detailed implementation manners

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] An embodiment of the present invention discloses a rehabilitation training ladder. As shown in the attached Figure 1 and 3 , it includes at least one set of ladder components 100 and a driving component 200, and the driving component 200 is connected to at least one set of ladder components 100. When the driving component 200 pushes the connected ladder components 100 in the first direction, all the ladder components 100 are unfolded into a ladder shape, as shown in the attached Figure 1 . When the driving component 200 pulls the connected ladder components 100 in the second direction, all the ladder components 100 are folded into a stacked shape, as shown in the attached Figure 2 . The first direction in the text refers to the direction away from the center of the rehabilitation training ladder. The second direction is parallel to the first direction and their directions are opposite.

[0040] In this specific embodiment, as shown in the attached Figure 3 , only one set of driving component 200 is provided, and the driving component 200 is connected to the bottommost ladder component 100. Each set of ladder components 100 is linked in a sliding connection manner, so that the bottommost ladder component 100 can drive the remaining sets of ladder components 100 to unfold or fold in sequence, with a simpler structure and less energy consumption. Of course, multiple sets of driving components 200 can also be provided, each set of driving components 200 is connected to one set of ladder components 100, and each set of driving components 200 drives the connected ladder components 100 to act in sequence, and can also make each ladder component 100 act in sequence to achieve unfolding or folding.

[0041] The present invention optimizes the rehabilitation training ladder, enabling all the ladder components 100 to be folded into a stacked shape. Compared with the existing rehabilitation training ladder that folds into a flat plate shape, the rehabilitation training ladder of the present invention occupies less space after folding and is convenient for storage.

[0042] The ladder component 100 includes a bottommost ladder component 101. As shown in the attached Figures 1 to 3 , the bottommost ladder component 101 includes at least one bottom step 1011. As shown in the attached Figure 1 and 3As shown in the figure, the driving assembly 200 includes a bidirectional screw 201, a first adjusting block 202, a second adjusting block 203, a first driving rod 204 and a second driving rod 205. The bidirectional screw 201 is rotatably arranged, and two driving threads with different helix directions are provided on the outer side of the bidirectional screw 201. The first adjusting block 202 and the second adjusting block 203 are respectively installed on the two driving threads with different helix directions, so that the first adjusting block 202 and the second adjusting block 203 move towards or away from each other under the drive of the bidirectional screw 201. The first driving rod 204 is hinged between the first end of the first adjusting block 202 and the bottom step 1011, and the second driving rod 205 is hinged between the second end of the second adjusting block 203 and the bottom step 1011. When the first adjusting block 202 and the second adjusting block 203 move away from each other under the drive of the bidirectional screw 201, the first driving rod 204 and the second driving rod 205 jointly push the bottom step 1011 to move away from the bidirectional screw 201, and the bottom step 1011 is unfolded. When the first adjusting block 202 and the second adjusting block 203 move towards each other under the drive of the bidirectional screw 201, the first driving rod 204 and the second driving rod 205 jointly pull the bottom step 1011 to move towards the bidirectional screw 201, and the bottom step 1011 is folded.

[0043] As shown in the attached Figures 1 to 3 As shown in the figure, the bottom step assembly 101 includes two bottom steps 1011, and the two bottom steps 1011 are symmetrically arranged on both sides of the support frame 300 with the support frame 300 as the center. One first driving rod 204 is symmetrically hinged to each of the two opposite sides of the first adjusting block 202, and one second driving rod 205 is symmetrically hinged to each of the two opposite sides of the second adjusting block 203, so that the first adjusting block 202 and the second adjusting block 203 jointly drive the two bottom steps 1011 to separate from each other or approach each other, so that the bottom step assembly 101 is correspondingly unfolded or folded. The first adjusting block 202 and the first driving rod 204, the first driving rod 204 and the bottom step 1011, the second adjusting block 203 and the second driving rod 205, and the second driving rod 205 and the bottom step 1011 are all hinged and connected by a rotating pin. The first driving rod 204 and the second driving rod 205 are both in a flat plate shape, so that the two have sufficient strength to push and pull the bottom step 1011. A weight-reducing hole is provided at the center of both the first driving rod 204 and the second driving rod 205, so that the rehabilitation training ladder is designed to be lightweight.

[0044] Both ends of the bidirectional screw 201 pass through the support frame 300. The support frame 300 is a portal frame, and rolling bearings are provided between both ends of the bidirectional screw 201 and the support frame 300 to support the rotation of the bidirectional screw 201 relative to the support frame 300. As shown in the attached Figure 3As shown in the figure, a driving motor 206 is installed at one end of the bidirectional screw 201, and the driving motor 206 drives the bidirectional screw 201 to rotate. The driving motor 206 is provided with a rotary encoder for detecting the rotation angle of the driving motor 206. Both the rotary encoder and the driving motor 206 are connected to the controller, and the controller is used to control the automatic start or stop of the driving motor 206 according to the angle signal fed back by the rotary encoder, avoiding damage to the rehabilitation training ladder caused by excessive rotation of the driving motor 206, with a lower failure rate and higher reliability.

[0045] A plurality of rolling wheels 1012 are provided at the bottom of the bottom step 1011, which can reduce the friction between the bottom step 1011 and the ground when the bottom step 1011 moves, facilitating the adjustment of the bottom step assembly 101.

[0046] The step assembly 100 includes at least one set of linkage step assemblies sequentially stacked on the bottom step assembly 101. Each set of linkage step assemblies includes at least one linkage step. A mutually cooperating chute 104 and slider 105 are provided between the bottom step 1011 and the adjacent linkage step and between two adjacent linkage steps for guiding the relative sliding of two adjacent step assemblies 100. A linkage block 106 is fixedly provided in the chute 104, which can not only prevent two adjacent step assemblies 100 from disengaging but also enable two adjacent step assemblies 100 to achieve linkage. When two adjacent step assemblies 100 slide relative to each other until the linkage block 106 abuts against the slider 105, the linkage block 106 is used to drive two adjacent step assemblies 100 to slide synchronously.

[0047] When two adjacent step assemblies 100 are both in the folded state, when one of the two adjacent step assemblies 100 slides in place relative to the other, one of the two adjacent step assemblies 100 is in the unfolded state while the other is in the folded state. At this time, the linkage block 106 of the step assembly 100 in the unfolded state abuts against the slider 105 of the step assembly 100 in the folded state, and the linkage block 106 drives two adjacent step assemblies 100 to slide synchronously, that is, the step assembly 100 in the unfolded state drives the step assembly 100 in the folded state to slide synchronously through the linkage block 106, causing the step assembly 100 in the folded state to slide relative to other step assemblies 100 until the step assembly 100 in the folded state turns into the unfolded state, enabling two adjacent step assemblies 100 to be sequentially linked and unfolded by relying on the linkage block 106, as shown in the appendix Figure 1 as shown.

[0048] When both of the adjacent two sets of stepped components 100 are in the unfolded state, the linkage block 106 of one of the adjacent two sets of stepped components 100 abuts against the slider 105 of the other. The adjacent two sets of stepped components 100 move synchronously through the linkage block 106 until the stepped component 100 provided with the slider 105 is in the folded state. At this time, one of the adjacent two sets of stepped components 100 is in the unfolded state while the other is in the folded state. The stepped component 100 in the unfolded state continues to slide relative to the slider 105 of the stepped component 100 in the folded state until the stepped component 100 in the unfolded state is transformed into the folded state, enabling the adjacent two sets of stepped components 100 to be folded by relying on the linkage block 106, as shown in the appendix Figure 2 as shown.

[0049] The linkage stepped component includes two sets, namely the first linkage stepped component 102 and the second linkage stepped component 103. The first linkage stepped component 102 includes two first linkage steps 1021 respectively, and the two first linkage steps 1021 are symmetrically arranged on both sides of the support frame 300 with the support frame 300 as the center. Similarly, the second linkage stepped component 103 includes two second linkage steps 1031 respectively, and the two second linkage steps 1031 are symmetrically arranged on both sides of the support frame 300 with the support frame 300 as the center. The lengths of the bottom step 1011, the first linkage step 1021, and the second linkage step 1031 are all equal, and they are all in the shape of a cuboid.

[0050] as shown in the appendix Figure 1 As shown, the two bottom steps 1011 are slidably connected to the two first linkage steps 1021 respectively in a one-to-one correspondence, and the two first linkage steps 1021 are slidably connected to the two second linkage steps 1031 respectively in a one-to-one correspondence. Chute grooves 104 are provided on the top side surfaces of the two bottom steps 1011, the two first linkage steps 1021, and the two second linkage steps 1031. A linkage block 106 is fixedly provided at one end of each chute groove 104 close to the center of the rehabilitation training ladder. Sliders 105 are provided on the bottom side surfaces of the two first linkage steps 1021 and the two second linkage steps 1031. The support frame 300 is provided with a slider 105 on the side facing the second linkage step 1031, which is matched with the chute groove 104 provided on the top side surface of the second linkage step 1031.

[0051] When the bidirectional screw 201 pushes the two bottom steps 1011 along the first direction through the first driving rod 204 and the second driving rod 205 respectively, the bottom steps 1011 slide outwards along the first direction relative to the first linkage step 1021 until the linkage block 106 of the bottom step 1011 abuts against the slider 105 of the first linkage step 1021; the bottom step 1011 continues to slide outwards along the first direction, and the bottom step 1011 drives the first linkage step 1021 to slide synchronously through the linkage block 106 until the linkage block 106 of the first linkage step 1021 abuts against the slider 105 of the second linkage step 1031; the bottom step 1011 continues to drive the first linkage step 1021 to slide synchronously along the first direction, and the first linkage step 1021 drives the second linkage step 1031 to slide synchronously through the linkage block 106 until the linkage block 106 of the second linkage step 1031 abuts against the slider 105 of the support frame 300, the bidirectional screw 201 stops rotating, the bottom step 1011, the first linkage step 1021 and the second linkage step 1031 are unfolded into a stepped shape, and the rehabilitation training ladder is completed, as shown in the attached Figure 1 shown.

[0052] When the bidirectional screw 201 pulls the two bottom steps 1011 along the second direction through the first driving rod 204 and the second driving rod 205 respectively, the bottom step 1011, the first linkage step 1021 and the second linkage step 1031 move synchronously along the second direction through the linkage block 106 until the second linkage step 1031 slides in place relative to the support frame 300, and the second linkage step 1031 is folded first; the bottom step 1011 continues to drive the first linkage step 1021 to slide synchronously along the second direction through the linkage block 106 until the first linkage step 1021 slides in place relative to the second linkage step 1031, and the first linkage step 1021 and the second linkage step 1031 are in a stacked state, and the first linkage step 1021 is folded; the bottom step 1011 continues to slide relative to the first linkage step 1021 along the second direction until the bottom step 1011 slides in place relative to the first linkage step 1021, and the bottom step 1011 and the first linkage step 1021 are in a stacked state, and the bottom step 1011 is folded. In this way, the second linkage step 1031, the first linkage step 1021 and the bottom step 1011 are sequentially folded into a stacked shape, and the rehabilitation training ladder is completed, as shown in the attached Figure 2 shown.

[0053] Anti-slip pads 107 are fixedly installed on the tread surfaces of the bottom step 1011 and all the linkage steps, increasing the friction between the bottom step 1011 and each linkage step, preventing the patient from slipping during the training process, and improving the safety of the training. The anti-slip pad 107 can specifically be a rubber pad, but is not limited thereto.

[0054] As shown in the attached Figures 1 to 3As shown, the bottom step 1011 and all the linked steps are hollow structures, which enables the rehabilitation training ladder to achieve a lightweight design. At least one reinforcing plate 108 is fixedly provided in the center of the hollow structure to ensure that the bottom step 1011 and all the linked steps have sufficient supporting force. There is only one reinforcing plate 108 in each of the bottom step 1011 and all the linked steps. The reinforcing plate 108 is perpendicular to the tread surface and divides the hollow structure into two. The length of the reinforcing plate 108 is equal to the length of the ladder assembly 100. Of course, the arrangement of the reinforcing plate 108 is not limited to this. For example, multiple reinforcing plates 108 can also be evenly arranged along the length direction of the bottom step 1011 and all the linked steps, which does not affect the purpose of the present invention.

[0055] As attached Figure 1 As shown, the rehabilitation training ladder also includes a fixed support frame 300, which slides with the uppermost linkage ladder assembly, and specifically slides with the second linkage step 1031. The bottom of the support frame 300 is fixed and plays a supporting role.

[0056] As attached Figures 1 to 3 As shown, the bottom step 1011 and all the linked steps are each equipped with a set of handrail assemblies 400. The handrail assembly 400 includes two rotatable handrail rods 401. When all the step assemblies 100 are in the unfolded state, the two handrail rods 401 are perpendicular to the connected step assemblies 100, providing a handhold for the patient during training. When all the step assemblies 100 are in the folded state, the two handrail rods 401 are parallel to the connected step assemblies 100. All the handrail rods 401 fold up, further reducing the space occupied by the rehabilitation training ladder and making it more convenient to store.

[0057] Each handrail 401 is retractable and can be flexibly adjusted in height according to the patient's height, with good adaptability. Figure 5 As shown, each handrail 401 includes an outer guide sleeve 4011 and an inner support rod 4012 slidably inserted into the outer guide sleeve 4011. The outer guide sleeve 4011 is equipped with a limit screw 4013. The limit screw 4013 passes through the side wall of the outer guide sleeve 4011 and abuts against the inner support rod 4012, thereby maintaining the stability of the handrail 401. The end of the inner support rod 4012 away from the outer guide sleeve 4011 is fixed with a handrail block 4014 for the patient to hold on to. Of course, each handrail 401 is not limited to two sections and can also have multiple sections.

[0058] As attached Figure 3As shown, the bottom step 1011 and all the linked steps are provided with a first limiting hole 109 and a second limiting hole 110. Either the first limiting hole 109 or the second limiting hole 110 is selectively matched with the limiting rod 402 provided on the handrail rod 401, which is used to limit the position of the handrail rod 401 when the handrail rod 401 is unfolded or folded, ensuring the stable position of the handrail rod 401. When the handrail rod 401 is folded, the limiting rod 402 is matched with the first limiting hole 109; when the handrail rod 401 is unfolded, the limiting rod 402 is matched with the second limiting hole 110.

[0059] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0060] Specific examples are used in this article to elaborate on the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A rehabilitation training ladder, characterized in that, It includes at least one set of ladder components (100) and a driving component (200) connected to at least one set of the ladder components (100); When the driving component (200) pushes the connected ladder components (100) in the first direction, all the ladder components (100) are unfolded into a ladder shape; When the driving component (200) pulls the connected ladder components (100) in the second direction, all the ladder components (100) are folded into a stacked shape; The ladder component (100) includes a bottom ladder component (101) at the bottom layer, and the bottom ladder component (101) includes at least one bottom step (1011); the driving component (200) includes: A bidirectional screw (201) rotatably arranged; A first adjusting block (202) and a second adjusting block (203) respectively sleeved on two driving threads with different helix directions of the bidirectional screw (201); A first driving rod (204) hinged between the first adjusting block (202) and the first end of the bottom step (1011); A second driving rod (205) hinged between the second adjusting block (203) and the second end of the bottom step (1011); The ladder component (100) includes at least one set of linkage ladder components sequentially stacked on the bottom ladder component (101). Each set of the linkage ladder components includes at least one linkage step. A mutually cooperating chute (104) and a slider (105) are provided between the bottom step (1011) and an adjacent linkage step and between two adjacent linkage steps. A linkage block (106) is fixedly arranged in the chute (104); when two adjacent sets of the ladder components (100) slide relative to each other until the linkage block (106) abuts against the slider (105), the linkage block (106) is used to drive two adjacent sets of the ladder components (100) to slide synchronously.

2. The rehabilitation training ladder according to claim 1, characterized in that, A plurality of rolling wheels (1012) are provided at the bottom of the bottom step (1011).

3. The rehabilitation training ladder according to claim 1, characterized in that, Anti-slip pads (107) are fixedly arranged on the tread surface of the bottom step (1011) and the tread surfaces of all the linkage steps.

4. The rehabilitation training ladder according to claim 1, wherein, The bottom step (1011) and all the linkage steps are of a hollow structure; at least one reinforcing plate (108) is fixedly arranged at the center of the hollow structure.

5. The rehabilitation training ladder according to claim 1, characterized in that, It further includes a support frame (300) fixedly arranged and slidably matched with the topmost linkage ladder component.

6. The rehabilitation training ladder according to claim 1, wherein A set of handrail components (400) are fixedly arranged on the bottom step (1011) and all the linkage steps. The handrail component (400) includes two rotatably arranged handrail rods (401); when all the ladder components (100) are in an unfolded state, the two handrail rods (401) are perpendicular to the connected ladder components (100); when all the ladder components (100) are in a folded state, the two handrail rods (401) are parallel to the connected ladder components (100).

7. The rehabilitation training ladder according to claim 6, characterized in that, Each handrail rod (401) is telescopically arranged.

8. The rehabilitation training ladder according to claim 6, wherein The bottom step (1011) and all the linked steps are provided with a first limiting hole (109) and a second limiting hole (110), and either the first limiting hole (109) or the second limiting hole (110) is selectively matched with a limiting rod (402) provided on the handrail rod (401).

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