Hybrid safety wheelchair for low floor bus

Abstract

The present invention relates to a hybrid safety wheelchair for low-floor buses, and more specifically, to a hybrid safety wheelchair for low-floor buses that enhances user safety by mitigating the transmission of impacts caused by front-to-rear collisions of the low-floor bus or impacts from stopping while driving, when a user with mobility difficulties uses the low-floor bus while seated in a wheelchair. The present invention is characterized by comprising: a seat cushion portion (100) on which a user sits; a backrest cushion portion (110) installed to be located on the rear side of the seat cushion portion (100) so that the user can lean their back against it; a seat frame portion (200) provided to support the seat cushion portion (100) and the backrest cushion portion (110); and a shock absorbing portion (300) installed on the seat frame portion (200) and mounted on a fixed portion (30) provided in the interior of a low-floor bus to absorb shock.

Description

Technology Field

[0001] The present invention relates to a hybrid safety wheelchair for low-floor buses, and more specifically, to a hybrid safety wheelchair for low-floor buses that enhances user safety by mitigating the transmission of impacts caused by front-to-rear collisions of the low-floor bus or impacts from stopping while driving, when a user with mobility difficulties uses the low-floor bus while seated in a wheelchair. Background Technology

[0003] Recently, as accessibility for the disabled and the elderly using wheelchairs is being improved, many facilities for wheelchair users are being installed in places such as subway stations, parks, bus terminals, restaurants, and government offices.

[0004] In particular, low-floor buses are designed to allow people with mobility impairments to board immediately while seated in their wheelchairs. To board such a bus, a button is operated from the driver's seat to lower a ramp, and the wheelchair rolls its wheels up the ramp. Once on board, the wheelchair moves to the designated wheelchair seat and pulls the rear seatbelt to secure the wheelchair.

[0005] However, not only is it difficult to securely fasten a wheeled wheelchair with only a seat belt in a moving vehicle, but there are also significant problems in ensuring the safety of wheelchair users due to front and rear collisions of low-floor buses or stopping impacts caused by sudden braking and frequent braking operations.

[0006] The technology forming the background of the present invention is disclosed in Korean registered patent No. 10-1280363, which includes an electric / manual combined module for a wheelchair and a wheelchair employing the same. The problem to be solved

[0008] The present invention was conceived in consideration of the aforementioned circumstances, and the objective of the present invention is to provide a hybrid safety wheelchair for low-floor buses that enhances the safety of wheelchair occupants by installing a shock-absorbing member connected to a fixed part provided on the low-floor bus on the rear side of the wheelchair when a user with difficulty walking uses the low-floor bus while seated in a wheelchair, thereby mitigating the transmission of front-to-rear collisions of the low-floor bus or stopping shocks occurring during driving to the user. means of solving the problem

[0010] The present invention for achieving the above objective comprises: a seat cushion portion (100) on which a user sits; a backrest cushion portion (110) installed to be located on the rear side of the seat cushion portion (100) so that the user can lean their back against it; and a seat frame portion (200) provided to support the seat cushion portion (100) and the backrest cushion portion (110). The shock absorbing member (300) is configured to absorb shock by being installed on the seat frame member (200) and mounted on a fixed member (30) provided in the interior of a low-floor bus. The seat frame member (200) is composed of a seat frame (210) that supports the seat cushion member (100) and a backrest frame (230) that is installed upright on the rear side of the seat frame member (210) to support the backrest cushion member (110). The shock absorbing member (300) is composed of a gas damper (310) that is mounted so that one side in the longitudinal direction can rotate up and down on a first mounting bracket (240) installed on the seat frame member (200), and a shock absorbing spring member (320) that is mounted so that one side in the longitudinal direction can rotate up and down on a second mounting bracket (250) installed on the seat frame member (200). A folding fixing means (400) comprising a damper fixing unit (410) for fixing the upwardly rotated gas damper (310) and a spring fixing unit (420) for fixing the shock-absorbing spring member (320) is provided in a seat frame part (200) located at a position spaced upwardly from the first and second mounting brackets (240, 250); the damper fixing unit (410) is composed of a damper fixing bracket (411) installed on the backrest frame (230) and a damper fixing index plunger (412) configured such that a protruding insertion pin (415) can be inserted into and removed from the interior of the body (413) by rotational operation of a rotating body (414) while installed on the damper fixing bracket (411); and the spring fixing unit (420) is the A spring fixing bracket (421) installed on the backrest frame (230), andIt is characterized by being composed of a spring fixing index plunger (422) such that the insertion / extraction pin (425) can be inserted into and removed from the interior of the body (423) by rotational operation of the rotational operating member (424) while installed on the spring fixing bracket (421). Additionally, the seat frame (210) is composed of a seat frame (211) forming a frame and a seating plate (212) connecting both sides in the width direction of the seat frame (211) on which the seat cushion part (100) is seated and fixed, and the backrest frame (230) is composed of a backrest frame (231) forming the frame of the backrest frame with its lower longitudinal side fixed to the seat frame (211), a fixing block (232) connecting both sides in the width direction of the backrest frame (231) on which the backrest cushion part (110) is fixed in close contact, and a reinforcing frame (233) having both sides in the length direction connected to both sides in the width direction of the backrest frame (231) while spaced upward from the fixing block (232). Additionally, the gas damper (310) comprises a cylinder tube (311) that is rotatably installed on one side in the longitudinal direction of the first mounting bracket (240) and a piston rod (312) that reciprocates inside the cylinder tube (311), wherein a rod assembly (313) is formed at the tip of the piston rod (312) and has a pin insertion hole (314) formed therein to allow the protruding insertion pin (415) to be inserted. Additionally, the shock-absorbing spring member (320) comprises a lower cap (321) provided with a lower bracket (322) rotatably connected to the first mounting bracket (240), an upper cap (323) provided with an upper bracket (324) into which the inlet / outlet pin (425) of the spring-fixing index plunger (422) can be inserted, and a compression spring (325) installed such that both longitudinal sides are connected to the lower cap (321) and the upper cap (323). Furthermore, a four-point safety belt (500) is installed on the seat frame (200) for the safety of a user seated on the seating cushion (100), andThe above 4-point safety belt (500) is composed of a pair of shoulder bands (510) installed vertically in front of the backrest cushion (110) to support both shoulder and chest areas of a user riding in a wheelchair, a pair of waist bands (520) installed horizontally in front of the backrest cushion (110) to support the waist area of ​​a user riding in a wheelchair and to which the pair of shoulder bands (510) are respectively connected, a tongue plate (530) installed at the end of one of the pair of waist bands (520), and a buckle member (540) installed at the end of the other of the pair of waist bands (520) to fix the tongue plate (530), and the upper longitudinal side of the shoulder band (510) is fixed to the lower longitudinal side of the backrest frame (231) of the backrest skeleton (230), and the upper longitudinal side is the A shoulder band mounting piece (511) is installed so as to be fixed to an upward hook portion (550) installed to be exposed to the outside of the backrest cushion portion (110), and a waist band mounting piece (521) is installed on one side of the waist band (520) so as to be hooked to a downward hook portion (560) installed to be fixed to the seat frame (211) of the seat frame (210). Additionally, the upper hanging part (550) is installed to be fixed to the backrest frame (231) and is composed of an upper fixing bush (551) having a mounting insertion hole (552) of a predetermined length formed from the upper side to the lower side, and an upper binding bolt (553) that is screw-coupled to the mounting insertion hole (552) of the upper fixing bush (551), and the shoulder band mounting piece (511) is installed to be hooked onto the upper binding bolt (553), and the lower hanging part (560) is composed of a lower fixing bush (561) having a binding fastening hole (563) of a predetermined depth formed in a state coupled to a reinforcing pipe (562) installed to connect both sides in the width direction of the seat frame (211), and is screw-coupled to the binding fastening hole (563) of the lower fixing bush (561). It is composed of a downward binding bolt (564), and the waist band mounting piece (521) is installed to be caught on the downward binding bolt (564).

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[0014] delete Effects of the invention

[0016] According to the present invention, the shock absorbing member mounted on the rear side of the seat frame can mitigate front-to-rear collisions of the low-floor bus or stopping shocks occurring during driving, and the safety of the wheelchair occupant can be enhanced through the application of a 4-point seat belt and a headrest. Brief explanation of the drawing

[0018] FIG. 1 is a state diagram showing a hybrid safety wheelchair for a low-floor bus according to the present invention. FIG. 2 is a diagram showing a state in which a shock absorbing part is installed in a hybrid safety wheelchair for a low-floor bus according to the present invention. FIG. 3 is a state diagram showing the state of the seat frame and the shock absorbing part according to the present invention. FIG. 4 is an enlarged view of a gas damper according to the present invention. FIG. 5 is an enlarged view of a damper fixing unit according to the present invention. FIG. 6 is an enlarged view of a shock-absorbing spring member according to the present invention. FIG. 7 is an enlarged view of a spring fixing unit according to the present invention. FIG. 8 is a diagram showing the installation state of a 4-point safety belt according to the present invention. FIG. 9 is a diagram showing a state in which a shoulder band mounting piece installed on a shoulder band according to the present invention is installed to be hooked onto an upward hook portion. FIG. 10 is a diagram showing the separated state of the upper hanging part according to the present invention. FIG. 11 is a diagram showing a state in which a waistband mounting piece installed on a waistband according to the present invention is installed to be caught on a downward hook portion. FIG. 12 is a diagram showing the separated state of the downward hanging part according to the present invention. FIG. 13 is a diagram showing the separated state of the headrest according to the present invention. FIG. 14 is a state diagram showing the state in which the shock absorbing part according to the present invention is connected to the fixed part. FIG. 15 is an enlarged view showing the state in which the shock absorbing part according to the present invention is connected to the fixed part. Specific details for implementing the invention

[0019] Hereinafter, a hybrid safety wheelchair for low-floor buses according to the present invention will be described in detail with reference to the attached drawings. Prior to this, in describing the present invention, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description will be omitted.

[0020] In addition, the terms described below are established considering their functions in the present invention, and these terms may vary depending on the intention or practice of the producer or manufacturer producing the product. Furthermore, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. The embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0021] Furthermore, when it is stated throughout the specification that a part is 'connected' to another part, this includes not only cases where they are 'directly connected,' but also cases where they are 'indirectly connected' with other elements interposed between them. Additionally, the term 'comprising' a component means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components.

[0022] Additionally, the term "directional" used in this invention is used in relation to the orientation of the disclosed drawings(s). Since the components of the embodiments of this invention may be positioned in various orientations, the term "directional" is used for illustrative purposes only and is not intended to be limiting.

[0023] FIG. 1 is a state diagram showing a hybrid safety wheelchair for a low-floor bus according to the present invention; FIG. 2 is a state diagram showing a state in which a shock absorbing part is installed on a hybrid safety wheelchair for a low-floor bus according to the present invention; FIG. 3 is a state diagram showing the state of a seat frame part and a shock absorbing part according to the present invention; FIG. 4 is an enlarged state diagram showing a gas damper according to the present invention; FIG. 5 is an enlarged state diagram showing a damper fixing unit according to the present invention; FIG. 6 is an enlarged state diagram showing a shock absorbing spring member according to the present invention; FIG. 7 is an enlarged state diagram showing a spring fixing unit according to the present invention; FIG. 8 is a state diagram showing the installation state of a 4-point safety belt according to the present invention; FIG. 9 is a state diagram showing a state in which a shoulder band mounting piece installed on a shoulder band according to the present invention is installed to be hooked onto an upward hook part; FIG. 10 is a state diagram showing the separated state of an upward hook part according to the present invention; FIG. 11 is a state diagram showing a waist band mounting piece installed on a waist band according to the present invention FIG. 12 is a diagram showing the state in which the lower hook is installed to be hooked onto the lower hook portion, FIG. 13 is a diagram showing the state in which the lower hook portion is separated according to the present invention, FIG. 14 is a diagram showing the state in which the shock absorber according to the present invention is connected to the fixed portion, and FIG. 15 is an enlarged diagram showing the state in which the shock absorber according to the present invention is connected to the fixed portion.

[0024] As illustrated in FIGS. 1 to 15 above, the hybrid safety wheelchair for a low-floor bus according to the present invention comprises a seat cushion part (100) for a user to sit on and a back cushion part (110), a seat frame part (200) provided to support the seat cushion part (100) and the back cushion part (110), and a shock absorbing part (300) mounted on the seat frame part (200) and connected to an interior fixing part (30) of the low-floor bus.

[0025] In other words, the hybrid safety wheelchair for low-floor buses according to the present invention enhances user safety by mitigating front-to-rear collisions or stopping shocks that occur while driving when a user with mobility difficulties uses a low-floor bus.

[0026] First, it should be noted that the basic configuration of the hybrid safety wheelchair for low-floor buses according to the present invention may include a rotating wheel (10) and a gripping handle (20) that allows a driving assistant to move the wheelchair.

[0027] The above-mentioned seat cushion (100) is configured to have a predetermined thickness and area so that a user with difficulty walking can sit on it. At this time, the seat cushion is equipped with a shock-absorbing material (not shown), such as styrofoam, inside to provide a comfortable seating state while mitigating driving shocks (shocks transmitted to the user from speed bumps, irregular road surfaces, etc.) that occur during the operation of the low-floor bus.

[0028] The above backrest cushion (110) is installed so as to be located on the rear side of the seat cushion (100) so that the user can lean their back against it, and it is preferable that a shock absorbing material such as styrofoam be installed inside to protect the user from forward and backward shaking and stopping shock (shock generated when stopping due to brake operation) that occurs while the low-floor bus is in motion.

[0029] The seat cushion (100) and backrest cushion (110) are configured to be supported by a steel seat frame (200) to increase the safety of the wheelchair.

[0030] In one embodiment, the seat frame (200) is composed of a seat frame (210) that supports the seat cushion (100) and a backrest frame (230) that is installed upright on the rear side of the seat frame (210) to support the backrest cushion (110).

[0031] The above-mentioned seating frame (210) may be composed of a seating frame (211) forming a skeletal frame and a seating plate (212) connecting both sides in the width direction of the seating frame (211) on which the seating cushion part (100) is seated and fixed.

[0032] Additionally, the backrest frame (230) may be composed of a backrest frame (231) that forms the frame of the backrest frame, with the lower longitudinal side fixed to the seat frame (211); a fixing block (232) that connects both sides of the backrest frame (231) in the width direction and is fixed so that the backrest cushion part (110) is in close contact with it; and a reinforcing frame (233) that is spaced upward from the fixing block (232) and has both longitudinal sides connected to both sides of the backrest frame (231) in the width direction.

[0033] At this time, an "L" shaped reinforcing member (260) may be installed to cover the lower longitudinal side of the backrest frame (231) and the rear side of the seat frame (211) to reinforce the rigidity of the connection part.

[0034] In addition, square frame-shaped armrests (220) are installed on both sides of the seat frame (210) in the width direction so that a wheelchair user can place their hands on them, and an extension frame (221) extending in the direction of the ground is installed on the lower side of the armrests (220), and a small wheel member (222) of the wheelchair is rotatably installed on the front lower side of the extension frame (221).

[0035] At this time, it is preferable that the lower side of the armrest (220) be fixedly installed on the side of the reinforcing installation member (260) and the seat frame (211).

[0036] In addition, the shock absorbing part (300) is installed on the seat frame part (200) and is mounted on a fixed part (30) provided in the interior of the low-floor bus to absorb shock. That is, in normal times, it is fixed to the interior surface of the low-floor bus to ensure driving safety, and in response to the forward and backward shaking that occurs while driving, it absorbs the shaking shock transmitted to the user, and in the event of an impact caused by a collision of the low-floor bus, it protects the wheelchair user from the risk of accidents such as the wheelchair being thrown off or flying into the air.

[0037] It is preferable that such a shock absorbing member (300) be installed on the seat frame member (200) so as to be foldable through vertical rotation. That is, when not boarding a low-floor bus, the shock absorbing member (300) is folded and fixed in the direction of the backrest frame (230) of the seat frame member (200) so as not to interfere with the activity assistant driving the wheelchair, and after boarding the low-floor bus, the shock absorbing member (300) is lowered from the backrest frame (230) and fixed to a fixing member (30) installed on the low-floor bus to ensure the driving safety of the wheelchair.

[0038] Looking at the shock absorbing member (300) as one embodiment, the shock absorbing member (300) may be configured to include a gas damper (310) with one longitudinal side mounted on a first mounting bracket (240) installed on the seat frame member (200), and a shock absorbing spring member (320) with one longitudinal side mounted on a second mounting bracket (250) installed on the seat frame member (200).

[0039] The first and second mounting brackets (240, 250) are mounted on the fixed block (232) to enable upward rotation of the gas damper (310) and the shock-absorbing spring member (320).

[0040] A pair of gas dampers (310) may be arranged at a certain distance from each other in the width direction of the backrest frame (230), and the shock-absorbing spring member (320) may be installed so as to be placed between the pair of gas dampers.

[0041] Additionally, a folding fixing means (400) may be installed in the seat frame (200) located at an upwardly spaced position from the first and second mounting brackets (240, 250) to fix the folded shock absorber (300). That is, the folding fixing means (400) is provided on the reinforcing frame (233) to fix the upwardly rotated gas damper (310) and shock absorber spring member (320) respectively.

[0042] As an embodiment, the folding fixing means (400) may be composed of a damper fixing unit (410) that fixes the gas damper (310) and a spring fixing unit (420) that fixes the shock-absorbing spring member (320).

[0043] The above damper fixing unit (410) is installed on the reinforcing frame (233) of the backrest frame (230) and may be composed of a damper fixing bracket (411) installed on the reinforcing frame (233) and a damper fixing index plunger (412) which is installed on the damper fixing bracket (411) and configured so that a protruding insertion pin (415) can be inserted into and removed from the interior of the body (413) by rotating the rotating body (414).

[0044] The above spring fixing unit (420) may be composed of a spring fixing bracket (421) installed on the reinforcing frame (233) and a spring fixing index plunger (422) which is installed on the spring fixing bracket (421) and configured so that an inlet / outlet pin (425) can be inserted into and removed from the interior of the body (423) by rotational operation of a rotational operating member (424).

[0045] The above gas damper (310) comprises a cylinder tube (311) that is rotatably installed on one longitudinal side of the first mounting bracket (240) and a piston rod (312) that reciprocates inside the cylinder tube (311). At this time, it is preferable that a rod assembly (313) is formed at the tip of the piston rod (312), having a pin insertion hole (314) formed therein to allow the protruding insertion pin (415) to be inserted.

[0046] The shock-absorbing spring member (320) comprises a lower cap (321) provided with a lower bracket (322) rotatably connected to the second mounting bracket (250), an upper cap (323) provided with an upper bracket (324) into which the inlet / outlet pin (425) of the spring-fixing index plunger (422) can be inserted, and a compression spring (325) installed such that both longitudinal sides are connected to the lower cap (321) and the upper cap (323).

[0047] In this way, the shock absorbing unit (300), composed of a gas damper (310) and a shock absorbing spring member (320), performs the role of absorbing shock at the shock absorbing spring member when shock energy is transmitted to the wheelchair, and performs a mutually complementary role of controlling vibrations generated when energy is released from the shock absorbing spring member at the gas damper, thereby safely protecting the wheelchair occupant from shock.

[0048] To briefly examine the operation state of the gas damper (310) and shock-absorbing spring member (320), normally the gas damper (310) and shock-absorbing spring member (320) are folded toward the backrest frame (230) and fixed by the damper fixing unit (410) and spring fixing unit (420).

[0049] Then, when boarding the low-floor bus, the index plunger of the damper fixing unit (410) and the spring fixing unit (420) is operated to release the fixed state of the gas damper (310) and the shock-absorbing spring member (320), and then the gas damper (310) and the shock-absorbing spring member (320) are rotated downward and fixed to the fixing part (30) provided in the interior of the low-floor bus so that the shock-absorbing state of the wheelchair can be achieved.

[0050] At this time, it would be preferable for the fixed part (30) to be pre-mounted on the interior side of the low-floor bus in a state corresponding to the damper fixing unit (410) and the spring fixing unit (420).

[0051] This simple operation method allows the wheelchair to be positioned inside the low-floor bus in a fixed state, enabling shock absorption.

[0052] In addition, a four-point safety belt (500) may be installed in the seat frame (200) to ensure the safety of the user seated on the seat cushion (100).

[0053] That is, the above 4-point safety belt (500) prevents fall accidents in which the user is thrown out of the wheelchair due to a front-to-rear collision or sudden stopping of the low-floor bus, and allows the user to maintain a proper posture while traveling to the destination.

[0054] A four-point safety belt (500) as one embodiment may be composed of a pair of shoulder bands (510) installed vertically in front of the backrest cushion (110) to support both shoulder and chest areas of a user riding in a wheelchair, a pair of waist bands (520) installed horizontally in front of the backrest cushion (110) to support the waist area of ​​a user riding in a wheelchair and to which the pair of shoulder bands (510) are each connected, a tongue plate (530) installed at the end of one of the pair of waist bands (520), and a buckle member (540) installed at the end of the other of the pair of waist bands (520) to secure the tongue plate (530).

[0055] It is preferable that a shoulder band mounting piece (511) be installed on the longitudinal upper side of the shoulder band (510) so that the longitudinal lower side is fixed to the backrest frame (231) of the backrest frame (230) and the longitudinal upper side is installed so as to be exposed to the outside of the backrest cushion part (110).

[0056] At this time, the upper hanging part (550) may be configured to be fixedly installed on the backrest frame (231) and to consist of an upper fixing bush (551) having a mounting insertion hole (552) of a predetermined length formed from the upper side to the lower side, and an upper binding bolt (553) that is screw-coupled to the mounting insertion hole (552) of the upper fixing bush (551). Here, it is preferable that the shoulder band mounting piece (511) be installed to be caught on the upper binding bolt (553).

[0057] It is preferable that a waistband mounting piece (521) be installed on one side of the above waistband (520) so as to be hooked onto a downward hook portion (560) that is fixedly installed on the seat frame (211) of the above seat frame (210).

[0058] At this time, the lower hanging part (560) may be composed of a lower fixing bush (561) having a binding hole (563) of a predetermined depth formed therein, which is coupled to a reinforcing pipe (562) installed to connect both sides in the width direction of the seat frame (211), and a lower binding bolt (564) which is screw-coupled to the binding hole (563) of the lower fixing bush (561). Here, it is preferable that the waist band mounting piece (521) be installed to be hooked onto the lower binding bolt (564).

[0059] The above lower fixing bush (561) may be installed such that one longitudinal side extends from the reinforcing installation member (260) toward the reinforcing pipe (562), and the other longitudinal side penetrates the armrest (220) and is exposed to the outside.

[0060] In this way, the above-mentioned 4-point safety belt (500) is designed so that it can be easily installed or removed by screwing or releasing the upper and lower connecting bolts (564) to the fixing bush. Therefore, when the safety belt is not needed in normal times, it can be carried in a separate carrying space, and when using a low-floor bus or when the use of the safety belt is required, it can be quickly fastened to a wheelchair for use, thereby increasing usability.

[0061] In addition, the seat frame (200) may be equipped with a belt hook (600) that allows a downward fixing belt (40) installed on the interior floor of the low-floor bus to be connected.

[0062] That is, the belt loop (600) is firmly fixed to the seat frame (211) and, when boarding the low-floor bus, the downward fixing belt (40) provided on the interior floor is pulled and hooked onto the belt loop (600), thereby preventing the wheelchair from slipping or shaking while the vehicle is in operation.

[0063] In addition, the backrest cushion (110) may be equipped with a headrest (700) that can absorb shock while preventing neck bone damage to the user riding in the wheelchair in the event of a rear-end collision of the vehicle.

[0064] At this time, a headrest fixing means (710) for fitting a mounting rod (701) formed on the headrest (700) may be installed in the seat frame part (200).

[0065] Although specific embodiments of the present invention have been described in detail as above, those skilled in the art will be able to make various modifications without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the embodiments described above, but should be defined by the claims set forth below as well as equivalents thereof. Explanation of the symbols

[0067] 10: Rotating wheel 20: Grip handle 30: Fixed part 40: Downward fixing belt 100: Seat cushion 110: Backrest cushion 200: Seat frame 210: Seat frame 220: Armrest 230: Backrest frame 300: Shock absorber 310: Gas damper 320: Shock-absorbing spring member 400: Folding fixing means 410: Damper Fixing Unit 420: Spring Fixing Unit 500: 4-point seat belt 510: Shoulder straps 520: Waistband 530: Tongue plate 540: Buckle component 550: Upward hanging part 560: Downward hanging part 600: Belt loop hook 700: Headrest

Claims

Claim 1 A seat cushion portion (100) on which a user sits; a backrest cushion portion (110) installed to be located on the rear side of the seat cushion portion (100) so that the user can lean their back against it; a seat frame portion (200) provided to support the seat cushion portion (100) and the backrest cushion portion (110); and a shock absorbing portion (300) installed on the seat frame portion (200) and mounted on a fixed portion (30) provided in the interior of a low-floor bus to absorb shock.The seat frame part (200) is configured to include a seat frame (210) that supports the seat cushion part (100) and a backrest frame (230) that is installed upright on the rear side of the seat frame (210) to support the backrest cushion part (110); the shock absorbing part (300) is configured to include a gas damper (310) that is mounted so that one side in the longitudinal direction can rotate up and down on a first mounting bracket (240) installed on the seat frame part (200), and a shock absorbing spring member (320) that is mounted so that one side in the longitudinal direction can rotate up and down on a second mounting bracket (250) installed on the seat frame part (200); wherein the seat frame part (200) at a position spaced upward from the first and second mounting brackets (240, 250) has the upwardly rotated A folding fixing means (400) is provided, comprising a damper fixing unit (410) for fixing a gas damper (310) and a spring fixing unit (420) for fixing a shock-absorbing spring member (320); the damper fixing unit (410) is composed of a damper fixing bracket (411) installed on the backrest frame (230) and a damper fixing index plunger (412) which is installed on the damper fixing bracket (411) and configured such that a protruding insertion pin (415) can be inserted into and removed from the interior of the body (413) by rotational operation of a rotating body (414); and the spring fixing unit (420) is composed of a spring fixing bracket (421) installed on the backrest frame (230) and a rotational operation member (424) installed on the spring fixing bracket (421). A hybrid safety wheelchair for a low-floor bus, characterized by being composed of a spring-fixing index plunger (422) such that the insertion / extraction pin (425) can be inserted into and removed from the interior of the body (423) by rotational operation. Claim 2 A hybrid safety wheelchair for a low-floor bus according to claim 1, wherein the seat frame (210) is composed of a seat frame (211) forming a frame and a seat plate (212) connecting both sides in the width direction of the seat frame (211) and on which the seat cushion part (100) is seated and fixed, and the backrest frame (230) is composed of a backrest frame (231) forming the frame of the backrest frame with its lower longitudinal side fixed to the seat frame (211), a fixing block (232) connecting both sides in the width direction of the backrest frame (231) and on which the backrest cushion part (110) is fixed in close contact, and a reinforcing frame (233) having both sides in the length direction connected to both sides in the width direction of the backrest frame (231) while spaced upward from the fixing block (232). Claim 3 A hybrid safety wheelchair for a low-floor bus according to claim 1 or 2, wherein the gas damper (310) is formed with a cylinder tube (311) that is rotatably installed on one longitudinal side of the first mounting bracket (240) and a piston rod (312) that reciprocates inside the cylinder tube (311), and a rod assembly (313) is formed at the tip of the piston rod (312) so that a pin insertion hole (314) can be inserted therein to allow the protruding insertion pin (415) to be inserted therein. Claim 4 A hybrid safety wheelchair for a low-floor bus, characterized in that, in paragraph 3, the shock-absorbing spring member (320) comprises a lower cap (321) provided with a lower bracket (322) rotatably connected to the first mounting bracket (240), an upper cap (323) provided with an upper bracket (324) into which the inlet / outlet pin (425) of the spring-fixing index plunger (422) can be inserted, and a compression spring (325) installed such that both longitudinal sides are connected to the lower cap (321) and the upper cap (323). Claim 5 In paragraph 2, a four-point safety belt (500) is installed in the seat frame portion (200) for the safety of a user seated on the seat cushion portion (100), wherein the four-point safety belt (500) comprises a pair of shoulder bands (510) installed vertically in front of the backrest cushion portion (110) to support both shoulder and chest areas of a user seated in a wheelchair, a pair of waist bands (520) installed horizontally in front of the backrest cushion portion (110) to support the waist area of ​​a user seated in a wheelchair and to which the pair of shoulder bands (510) are respectively connected, a tongue plate (530) installed at the end of one of the pair of waist bands (520), and a buckle member (540) installed at the end of the other of the pair of waist bands (520) to fix the tongue plate (530), and A hybrid safety wheelchair for a low-floor bus, characterized in that a shoulder band mounting piece (511) is installed on the longitudinal upper side of the shoulder band (510) so that the longitudinal lower side is fixed to the backrest frame (231) of the backrest frame (230) and the longitudinal upper side is installed so that it can be fixed to an upward hook part (550) which is installed so that the longitudinal upper side is exposed to the outside of the backrest cushion part (110), and a waist band mounting piece (521) is installed on one side of the waist band (520) so that it can be hooked to a downward hook part (560) which is installed so that it can be fixed to the seat frame (211) of the seat frame (210). Claim 6 In claim 5, the upper hanging part (550) is installed to be fixed to the backrest frame (231) and is composed of an upper fixing bush (551) having a mounting insertion hole (552) of a predetermined length formed from the upper side to the lower side, and an upper binding bolt (553) that is screw-coupled to the mounting insertion hole (552) of the upper fixing bush (551), and the shoulder band mounting piece (511) is installed to be hooked onto the upper binding bolt (553), and the lower hanging part (560) is composed of a lower fixing bush (561) having a binding fastening hole (563) of a predetermined depth formed in a state coupled to a reinforcing pipe (562) installed to connect both sides in the width direction of the seat frame (211), and is screw-coupled to the binding fastening hole (563) of the lower fixing bush (561). A hybrid safety wheelchair for a low-floor bus, characterized by being composed of a downward binding bolt (564) and the waist band mounting piece (521) being installed to be caught on the downward binding bolt (564).

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