Wheelchair securing mechanism

Abstract

The present disclosure provides a wheelchair fixing mechanism in which alignment of a locking pin and a latch is easily performed. A wheelchair fixing mechanism according to one aspect of the present disclosure is configured to fix a wheelchair to a fixing portion provided in a vehicle. The wheelchair fixing mechanism includes an engaged portion and an engaging portion. The engaged portion has at least one locking pin that is rod-shaped and extends in a vertical direction. The engaging portion has a housing portion that houses the locking pin, a latch that restricts the locking pin from being disengaged from the housing portion, and a guide portion that guides the locking pin toward the housing portion. The guide portion has a first guide surface and a second guide surface that face each other in a width direction of the wheelchair, and the first guide surface and the second guide surface are closer to each other toward the at least one housing portion.

Description

Technical Field

[0001] This disclosure relates to wheelchair restraint mechanisms. Background Technology

[0002] It is known that locking pins and latches are used in vehicles such as automobiles as mechanisms for securing wheelchairs to the floor or other locations (see Japanese Patent Application Publication No. 8-150176). Summary of the Invention

[0003] In traditional wheelchair securing mechanisms using locking pins and latches, misalignment of these components would prevent the wheelchair from being secured, necessitating precise alignment. Furthermore, alignment is difficult when the locking pins or latches are not visually visible.

[0004] One aspect of this disclosure preferably provides a wheelchair securing mechanism that facilitates the alignment of the locking pin and the latch.

[0005] One aspect of this disclosure relates to a wheelchair securing mechanism configured to secure a wheelchair to a fixing part of a vehicle. The wheelchair securing mechanism includes: a locking portion disposed on one of the wheelchair and the fixing part; and a locking portion disposed on the other of the wheelchair and the fixing part. The locking portion has at least one locking pin, which is rod-shaped and extends in a vertical direction.

[0006] The engaging part has at least one receiving part, at least one locking mechanism, and at least one guide part. The at least one receiving part is configured to receive at least one locking pin, the at least one locking mechanism is configured to restrict at least one locking pin from disengaging from at least one receiving part, and the at least one guide part is configured to guide the locking pin toward at least one receiving part.

[0007] At least one guide portion has a first guide surface and a second guide surface, the first guide surface and the second guide surface being opposite each other in the width direction of the wheelchair in the state of being fixed to the fixing portion, and the distance between the first guide surface and the second guide surface decreases toward at least one receiving portion.

[0008] The engaging portion includes: a base portion, at least one receiving portion and at least one guide portion disposed on the base portion; and a position adjusting mechanism configured to apply force to the base portion toward the center in the width direction and hold the base portion so that it can move in the width direction.

[0009] The position adjustment mechanism has a first spring and a second spring. One of the first spring and the second spring is located on the left side of the center of the base portion in the width direction, and the other spring is located on the right side of the center of the base portion in the width direction. The first spring and the second spring apply force to the base portion toward the initial position set at the center in the width direction.

[0010] The engaging portion has a buffer portion, which is positioned outward in the width direction from at least one locking pin. The length of the base portion in the width direction increases along the direction in which at least one locking pin is inserted into at least one receiving portion.

[0011] According to the structure described above, when the engaging and locking parts are engaged, the first and second guide surfaces of the guide portion guide the locking pin toward the receiving portion, which is in a fixed position. Therefore, it is easy to align the locking pin and the locking mechanism.

[0012] Furthermore, according to the structure described above, the positional deviation of the locking pin and the latch in the width direction of the wheelchair is absorbed by the movement of the base portion. Therefore, the alignment of the locking pin and the latch becomes easier.

[0013] Furthermore, according to the structure described above, when the engaging parts engage, the end of the base part in the width direction of the wheelchair contacts the buffer part, thereby adjusting the position of the base part. Therefore, the alignment of the locking pin and the locking mechanism becomes easier.

[0014] In one embodiment of this disclosure, the engaging portion may have multiple locking pins as at least one locking pin, the multiple locking pins being arranged separately from each other in the width direction. The engaging portion may have multiple receiving portions, multiple locking pins, and multiple guide portions as at least one receiving portion, at least one locking pin, and at least one guide portion. According to the structure described above, the stability of the wheelchair in the fixed state is improved.

[0015] In one embodiment of this disclosure, the engaging portion can be provided on the fixing portion. The engaging portion can be provided on a wheelchair. According to the structure described above, a locking operation portion for releasing the lock can be provided on the wheelchair. Therefore, the wheelchair user can release the lock.

[0016] In one embodiment of this disclosure, the fixing part can be a vehicle seat. According to the structure described above, the wheelchair and the vehicle seat can be integrated. Therefore, the seat belt of the vehicle seat can be used by the wheelchair user. Attached Figure Description

[0017] Figure 1 This is a schematic perspective view of the wheelchair restraint mechanism according to the implementation method.

[0018] Figure 2 yes Figure 1 A schematic perspective view of a wheelchair restraint mechanism for a vehicle seat.

[0019] Figure 3 yes Figure 2A schematic perspective view of the locking mechanism of a seat in a vehicle.

[0020] Figure 4 yes Figure 1 A schematic perspective view of a wheelchair with a wheelchair restraint mechanism.

[0021] Figure 5 yes Figure 4 A schematic bottom view of the locking mechanism of a wheelchair.

[0022] Figure 6 yes Figure 5 A schematic top view of the engaging part.

[0023] Figure 7 yes Figure 5 A schematic rear view of the engaging part. Detailed Implementation

[0024] The embodiments of which this disclosure is applied will be described below with reference to the accompanying drawings.

[0025] [1. First Embodiment]

[0026] [1-1. Structure]

[0027] Figure 1 The wheelchair securing mechanism 1 shown is a mechanism for securing a wheelchair 102 to a vehicle seat 101 installed in a vehicle. The wheelchair securing mechanism 1 is configured to include a locking part 2 and a locking part 3.

[0028] Examples of vehicles for which the vehicle seat 101 is installed include automobiles, railway vehicles, ships, and aircraft. Furthermore, the directions mentioned in the following description and the accompanying drawings refer to the directions within the vehicle seat 101. Additionally, the front-to-back, width-to-width, and vertical directions of the wheelchair 102, which is fixed to the vehicle seat 101, are aligned with the front-to-back, width-to-width, and vertical directions of the vehicle seat 101, respectively.

[0029] <Seats for vehicles>

[0030] The vehicle seat 101 is used as a seating seat for a vehicle and also functions as a fixation part for securing the wheelchair 102.

[0031] like Figure 2 As shown, the vehicle seat 101 includes a seat cushion 101A, a seat back 101B, a first leg rest 101C, a second leg rest 101D, and a seat belt 101E (see reference). Figure 1 ), seat belt buckle 101F, and the locking part 2.

[0032] The seat cushion 101A is the part that supports the buttocks of the occupant of the vehicle seat 101. The seat back 101B is the part that supports the back of the occupant of the vehicle seat 101. Figure 2 As shown, when the wheelchair 102 is secured, the seat cushion 101A is flipped up. That is, the seat cushion 101A is configured to swing between a seated position and a flipped-up position.

[0033] The first leg 101C and the second leg 101D support the seat cushion 101A and the seat back 101B. The first leg 101C and the second leg 101D are spaced apart from each other in the width direction.

[0034] The first leg 101C is positioned to the left of the second leg 101D. The first leg 101C and the second leg 101D are mounted on a sliding mechanism 103, which is disposed on the floor of the vehicle.

[0035] The sliding mechanism 103 is configured to allow the vehicle seat 101 to slide in the fore-and-aft direction. The sliding mechanism 103 has a first guide rail 103A and a second guide rail 103B spaced apart from each other in the width direction of the vehicle seat 101. The first leg 101C is held in place by the first guide rail 103A for sliding. The second leg 101D is held in place by the second guide rail 103B for sliding.

[0036] Figure 1 The seat belt 101E shown is held at the seat back 101B. The seat belt 101E has a insert plate that can be installed and removed relative to the seat belt buckle 101F located on the outer side of the seat cushion 101A in the width direction.

[0037] The seat belt 101E is mounted from one shoulder of the seat back 101B toward the seat belt buckle 101F, and is thus fitted to the occupant of the vehicle seat 101. In addition, with the wheelchair 102 secured to the vehicle seat 101, the seat belt 101E can be fitted to the occupant of the wheelchair 102.

[0038] <Being stuck in the middle>

[0039] like Figure 3 As shown, the engaging part 2 is located below the seat cushion 101A and seat back 101B of the vehicle seat 101. The engaging part 2 includes a first locking pin 21A, a second locking pin 21B, a first buffer part 22A, a second buffer part 22B, a base 23, and a support beam 24.

[0040] The first lock pin 21A and the second lock pin 21B are each a rod-shaped member extending in the up-down direction. The first lock pin 21A and the second lock pin 21B are arranged apart from each other in the width direction of the wheelchair 102, that is, in the width direction of the vehicle seat 101, in a state of being fixed to the vehicle seat 101.

[0041] The first lock pin 21A is arranged to the left of the second lock pin 21B. Further, the first lock pin 21A and the second lock pin 21B are arranged so as to overlap in the width direction of the vehicle seat 101. That is, the first lock pin 21A and the second lock pin 21B are the same in position in the front-rear direction of the vehicle seat 101.

[0042] Further, the first lock pin 21A and the second lock pin 21B are arranged between the first leg portion 101C and the second leg portion 101D in the width direction of the vehicle seat 101. The distance between the first leg portion 101C and the first lock pin 21A and the distance between the second leg portion 101D and the second lock pin 21B are the same.

[0043] The first buffer portion 22A and the second buffer portion 22B are arranged at positions further outward in the width direction than the first lock pin 21A and the second lock pin 21B. Specifically, the first buffer portion 22A is arranged at a position further to the left and further forward than the first lock pin 21A. The second buffer portion 22B is arranged at a position further to the right and further forward than the second lock pin 21B.

[0044] The first buffer portion 22A is a curved plate-shaped member fixed to the front end portion of the first leg portion 101C. The first buffer portion 22A is arranged so as to span from the front end surface of the first leg portion 101C to the right surface of the first leg portion 101C, that is, the surface opposite the second buffer portion 22B.

[0045] The second buffer portion 22B is a curved plate-shaped member fixed to the front end portion of the second leg portion 101D. The second buffer portion 22B is arranged so as to span from the front end surface of the second leg portion 101D to the left surface of the second leg portion 101D, that is, the surface opposite the first buffer portion 22A.

[0046] The base 23 supports the lower end portion of the first lock pin 21A and the lower end portion of the second lock pin 21B. The base 23 links the first leg portion 101C and the second leg portion 101D in the width direction. The upper surface of the base 23 is curved in such a manner that the angle of inclination thereof with respect to the horizontal direction becomes smaller as it tends toward the rear. That is, the base 23 has a guide surface that guides the engagement portion 3 upward.

[0047] The support beam 24 holds the upper end of the first lock pin 21A and the upper end of the second lock pin 21B. The support beam 24 connects the first leg portion 101C and the second leg portion 101D in the width direction at a position higher than the base 23.

[0048] <Wheelchair>

[0049] As Figure 4 shown, the wheelchair 102 has a seat 102A, a first wheel 102B, a second wheel 102C, and an engagement portion 3.

[0050] The first wheel 102B and the second wheel 102C are respectively rotatably attached to the seat 102A. The first wheel 102B is disposed on the left side of the second wheel 102C. The seat 102A, the first wheel 102B, and the second wheel 102C are publicly known members for a wheelchair. The wheelchair 102 is capable of traveling in the front-rear direction of the seat 102A.

[0051] <Engagement portion>

[0052] As Figure 5 shown, the engagement portion 3 has a first housing portion 31A, a second housing portion 31B, a first lock 32A, a second lock 32B, a first guide portion 33A, a second guide portion 33B, a base portion 35, a position adjustment mechanism 36, and a release lever 37 (see Figure 4 ). Further, Figure 5 is a schematic view of the wheelchair 102 as viewed from the bottom surface.

[0053] The first housing portion 31A is a recess configured to house the first lock pin 21A. The second housing portion 31B is a recess configured to house the second lock pin 21B. The first housing portion 31A and the second housing portion 31B each have a C-shaped form having an opening at the rear side when viewed from above. The first lock pin 21A is inserted into the first housing portion 31A from the rear side, and the second lock pin 21B is inserted into the second housing portion 31B from the rear side.

[0054] The first lock 32A is configured to restrict the first lock pin 21A from disengaging from the first housing portion 31A. As Figure 6 and Figure 7 shown, the first lock 32A is configured to be displaceable to a locked position and a lock release position, where the locked position is a position at which the first lock 32A restricts the first lock pin 21A from moving rearward by closing the opening of the first housing portion 31A, and the lock release position is a position at which the first lock 32A opens the first housing portion 31A. Further, Figure 6 is a plan view of a portion of the seat 102A of the wheelchair 102 with the illustration omitted.

[0055] A load is input from the rear to the first latch 32A, which is in the locked position, thereby moving the first latch 32A to the unlocked position. Furthermore, an elastic body (not shown) applies force to the first latch 32A from the unlocked position toward the locked position.

[0056] By moving the wheelchair 102 rearward toward the vehicle seat 101, the first locking pin 21A collidees with the first latch 32A, which is in the locked position, from the front. This moves the first latch 32A to the unlocked position, allowing the first locking pin 21A to be received in the first receiving portion 31A. Once the first locking pin 21A is received in the first receiving portion 31A and the load on the first latch 32A has been released, the first latch 32A moves to the locked position by force applied by the elastic body. Thus, the first locking pin 21A is locked.

[0057] The second locking mechanism 32B is configured to prevent the second locking pin 21B from disengaging from the second receiving portion 31B. The structure of the second locking mechanism 32B is the same as that of the first locking mechanism 32A. That is, the second locking mechanism 32B moves from the locked position to the unlocked position by the collision of the second locking pin 21B, and is subjected to force from the unlocked position toward the locked position.

[0058] The wheelchair 102 is moved backward from the front of the vehicle seat 101 towards the rear of the vehicle seat 101, thereby causing the first locking pin 21A to be received in the first receiving part 31A and the second locking pin 21B to be received in the second receiving part 31B. The first locking pin 21A is held by the first locking latch 32A and the second locking pin 21B is held by the second locking latch 32B. As a result, the engaging part 3 is fixed to the engaging part 2.

[0059] The first locking mechanism 32A and the second locking mechanism 32B pass through. Figure 6 The cable 321 shown is Figure 4 The release lever 37 shown is connected. By operating the release lever 37, the first latch 32A and the second latch 32B are displaced from the locked position to the unlocked position.

[0060] When the person seated in the wheelchair 102, which is fixed to the vehicle seat 101, operates the release lever 37, the wheelchair 102 is moved forward, thereby detaching from the vehicle seat 101. If the operation input to the release lever 37 is released, the first latch 32A and the second latch 32B return to the locked position by means of the force applied by the elastic body.

[0061] The first guide section 33A is configured to guide the first locking pin 21A toward the first receiving section 31A. The first guide section 33A is provided continuously behind the first receiving section 31A.

[0062] The first guide portion 33A has a first guide surface 331 and a second guide surface 332 that face each other in the width direction, and the distance between the first guide surface 331 and the second guide surface 332 decreases toward the first housing portion 31A. The first guide surface 331 and the second guide surface 332 define a passage of the first lock pin 21A.

[0063] The first guide surface 331 and the second guide surface 332 each are parallel to the up-down direction. The first guide surface 331 of the first guide portion 33A is disposed at a position that is leftward of the second guide surface 332, and extends toward the left rear from the first housing portion 31A. The second guide surface 332 extends toward the right rear from the first housing portion 31A.

[0064] The first lock 32A is disposed at the first guide portion 33A. The first lock 32A in the locked position is bridged from the first guide surface 331 to the second guide surface 332. The first lock 32A is displaced from the locked position to the locked release position by swinging in a direction away from the first guide surface 331.

[0065] The second guide portion 33B is configured to guide the second lock pin 21B toward the second housing portion 31B. The second guide portion 33B is disposed continuously with the second housing portion 31B rearward of the second housing portion 31B.

[0066] The second guide portion 33B has a shape that is symmetrical with the first guide portion 33A with respect to a center line in the width direction of the wheelchair 102. That is, the second guide portion 33B has a first guide surface 331 and a second guide surface 332 that face each other in the width direction, and the distance between the first guide surface 331 and the second guide surface 332 decreases toward the second housing portion 31B. Further, the second lock 32B is disposed at the second guide portion 33B.

[0067] The base portion 35 is held on the seat 102A, and the base portion 35 is disposed in the width direction between the first wheel 102B and the second wheel 102C. As shown in FIG. 1, the base portion 35 has a cover portion 351 and a support plate 352. Figure 5

[0068] The cover portion 351 is a component that houses the operation mechanism of the first lock 32A and the operation mechanism of the second lock 32B. That is, the first lock 32A and the second lock 32B are held at the base portion 35. The first housing portion 31A, the second housing portion 31B, the first guide portion 33A, and the second guide portion 33B are provided at a rear end portion of the cover portion 351.

[0069] ​The length of the cover portion 351 in the width direction (i.e., the length in the left-right direction) increases along the direction in which the first locking pin 21A is inserted into the first receiving portion 31A and the direction in which the second locking pin 21B is inserted into the second receiving portion 31B (i.e., towards the front).

[0070] Specifically, a first collision surface 351A is provided at the left end of the rear end of the cover 351 (i.e., the left side of the first receiving part 31A). The first collision surface 351A is parallel to the vertical direction and is tilted so that the distance between it and the center line C in the width direction of the wheelchair 102 decreases rearward.

[0071] Furthermore, a second collision surface 351B is provided at the right end of the rear end of the cover 351 (i.e., the right side of the second receiving part 31B). The second collision surface 351B is parallel to the vertical direction and is tilted so that the distance between it and the center line C in the width direction of the wheelchair 102 decreases rearward.

[0072] The first impact surface 351A is the part that collides or slides into contact with the first buffer portion 22A of the vehicle seat 101 when the engaging part 3 moves toward the engaged part 2. The second impact surface 351B is the part that collides or slides into contact with the second buffer portion 22B of the vehicle seat 101 when the engaging part 3 moves toward the engaged part 2. When the engaging part 3 engages with the engaged part 2 (i.e., when the wheelchair 102 is fixed to the vehicle seat 101), the base part 35 is inserted into the lower part of the vehicle seat 101 from the front.

[0073] like Figure 7 As shown, a plurality of protruding strips 351C are provided on the first collision surface 351A and the second collision surface 351B, and the plurality of protruding strips 351C are arranged in a vertical direction. A portion of the plurality of protruding strips 351C extends from the first collision surface 351A or the second collision surface 351B to the front end face of the cover portion 351.

[0074] Figure 5 The support plate 352 shown is fixed to the cover portion 351 from below. The support plate 352 and the cover portion 351 together clamp the frame 361 of the position adjustment mechanism 36 in the vertical direction. The length of the support plate 352 in the width direction is less than the length of the cover portion 351 in the width direction. In addition, the rear end of the support plate 352 is located in front of the rear end of the cover portion 351.

[0075] The position adjustment mechanism 36 is configured to apply force to the base portion 35 toward the center in the width direction of the wheelchair 102 and hold the base portion 35 so that it can move in the width direction. The position adjustment mechanism 36 includes a frame 361, a first spring 362, and a second spring 363.

[0076] The frame 361 extends in the seat width direction. The frame 361 is fixed to the seat 102A and supports the base 35 so as to be movable in the width direction.

[0077] One end of the first spring 362 is attached to a portion of the base 35 that is on the left side of the center in the width direction, and the other end of the first spring 362 is attached to the seat 102A. One end of the second spring 363 is attached to a portion of the base 35 that is on the right side of the center in the width direction, and the other end of the second spring 363 is attached to the seat 102A.

[0078] The first spring 362 and the second spring 363 apply a force to the base 35 toward an initial position that is set at the center in the width direction. If the base 35 moves to the right side due to a collision with the first cushion 22A, the first spring 362 is elongated, and the second spring 363 is compressed. Thus, a force is applied to the base 35 toward the left side. Conversely, if the base 35 moves to the left side due to a collision with the second cushion 22B, the first spring 362 is compressed, and the second spring 363 is elongated. Thus, a force is applied to the base 35 toward the right side.

[0079] [1-2. Effects]

[0080] According to the above-described embodiments, the following effects can be obtained.

[0081] (1a) When the engaged portion 2 and the engaging portion 3 are engaged, the first locking pin 21A is guided toward the first housing portion 31A, which is a fixed position, by the first guide surface 331 and the second guide surface 332 of each of the first guide portion 33A and the second guide portion 33B, and the second locking pin 21B is guided toward the second housing portion 31B. Thus, the alignment of the first locking pin 21A and the first latch 32A and the alignment of the second locking pin 21B and the second latch 32B are easily performed.

[0082] (1b) The first locking pin 21A is held by the first housing portion 31A and the first latch 32A, and the second locking pin 21B is held by the second housing portion 31B and the second latch 32B. Thus, the stability of the wheelchair 102 in the fixed state is improved.

[0083] (1c) The position deviation of the first locking pin 21A and the first latch 32A in the width direction of the wheelchair 102 and the position deviation of the second locking pin 21B and the second latch 32B in the width direction of the wheelchair 102 are absorbed by the movement of the base 35 in the width direction of the wheelchair 102 by the position adjustment mechanism 36. Thus, the alignment of the first locking pin 21A and the first latch 32A and the alignment of the second locking pin 21B and the second latch 32B are easily performed.

[0084] (1d) When the engaging portion 2 and the engaging portion 3 are engaged, the end portion of the base portion 35 in the width direction of the wheelchair 102 contacts the first buffer portion 22A or the second buffer portion 22B, thereby adjusting the position of the base portion 35. Thus, the alignment of the first locking pin 21A and the first lock 32A and the alignment of the second locking pin 21B and the second lock 32B are made easy.

[0085] (1e) The engaging portion 2 is provided on the vehicle seat 101, and the engaging portion 3 is provided on the wheelchair 102, whereby an operation portion for releasing the lock of the first lock 32A and the second lock 32B can be provided on the wheelchair 102. Thus, the occupant of the wheelchair 102 can release the lock of the first lock 32A and the second lock 32B.

[0086] (1f) The fixing portion of the wheelchair 102 is the vehicle seat 101, whereby the wheelchair 102 and the vehicle seat 101 can be integrated. Thus, the occupant of the wheelchair 102 can use the safety belt 101E of the vehicle seat 101.

[0087] [2. Other Embodiments]

[0088] The embodiments of the present disclosure have been described above, but the present disclosure is not limited to the above-described embodiments, and various embodiments can be adopted.

[0089] (2a) In the wheelchair fixing mechanism of the above-described embodiments, the engaging portion can have one or more than three locking pins. The engaging portion can also have one or more than three receiving portions, one or more than three locks, and one or more than three guide portions.

[0090] (2b) In the wheelchair fixing mechanism of the above-described embodiments, the engaging portion can also not have a buffer portion. In addition, the engaging portion can also not have a position adjusting mechanism.

[0091] (2c) In the wheelchair fixing mechanism of the above-described embodiments, the fixing portion that fixes the wheelchair can also not be a vehicle seat. For example, the fixing portion can be a wall panel, a frame, or the like provided in a vehicle, which is a structure other than a vehicle seat.

[0092] (2d) In the wheelchair fixing mechanism of the above-described embodiments, the engaging portion (i.e., the locking pin) can also be provided on the wheelchair. The engaging portion (i.e., the lock) can also be provided on the fixing portion such as a vehicle seat.

[0093] (2e) The functions of one element in the above-described embodiments can be performed by multiple elements, or the functions of multiple elements can be integrated into one element. In addition, a part of the above-described elements can be omitted. Furthermore, at least a part of the above-described elements of one embodiment can be added to another embodiment, or at least a part of the above-described elements of one embodiment can be replaced with the above-described elements of another embodiment. Furthermore, all the modes included in the technical ideas determined by the statements in the claims are the embodiments of the present disclosure.

Claims

1. A wheelchair securing mechanism configured to secure a wheelchair to a fixed part provided on a vehicle, the wheelchair securing mechanism being characterized by comprising: A locking portion is disposed on one of the wheelchair and the fixing portion; and A locking part, the locking part being disposed on the wheelchair and the other of the fixing parts, and The engaging portion has at least one locking pin, which is rod-shaped and extends in the vertical direction. The engaging part has at least one receiving part, at least one locking part, and at least one guiding part. The at least one receiving portion is configured to receive the at least one locking pin. The at least one latch is configured to prevent the at least one locking pin from disengaging from the at least one receiving portion. The at least one guide portion is configured to guide the locking pin toward the at least one receiving portion. The at least one guide portion has a first guide surface and a second guide surface, the first guide surface and the second guide surface being opposite each other in the width direction of the wheelchair when it is fixed to the fixing portion, and the distance between the first guide surface and the second guide surface decreases towards the at least one receiving portion. The engaging portion has: The base portion, the at least one receiving portion and the at least one guiding portion are disposed on the base portion; and A position adjustment mechanism is configured to apply force to the base portion toward the center in the width direction and hold the base portion so that it can move in the width direction. The position adjustment mechanism includes a first spring and a second spring. One of the first spring and the second spring is located on the left side of the center of the base portion in the width direction, and the other spring is located on the right side of the center of the base portion in the width direction. The first spring and the second spring apply force to the base portion toward an initial position set at the center in the width direction. The engaging portion has a buffer portion, which is positioned outward in the width direction from the at least one locking pin. The length of the base portion in the width direction increases along the direction in which the at least one locking pin is inserted into the at least one receiving portion.

2. The wheelchair securing mechanism according to claim 1, characterized in that, As the at least one locking pin, the engaging portion has a plurality of locking pins, which are spaced apart from each other in the width direction. The engaging portion has multiple receiving portions, multiple locking portions, and multiple guiding portions, serving as the at least one receiving portion, the at least one locking portion, and the at least one guiding portion.

3. The wheelchair securing mechanism according to claim 1, characterized in that, The engaging part is disposed on the fixing part. The engaging part is mounted on the wheelchair.

4. The wheelchair securing mechanism according to claim 1, characterized in that, The fixed part is a seat for a vehicle.

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