Backrest bag and backrest fixing structure for slow vehicle

Abstract

The utility model relates to a slow vehicle such as scooter, wheelchair, specifically relates to a back bag and back fixing structure for slow vehicle, a back bag and back fixing structure for slow vehicle, including back and the back bag body at back rear side, the back bag body upper portion is equipped with a plurality of fixed parts, the fixed part front end has the fixed part that extends downward, the back upper portion is equipped with the fixed groove that opens upward, the back bag body lower extreme with the back lower portion interval is equipped with the magnetic attraction lock that mutually cooperates, the magnetic attraction lock includes first lock portion and second lock portion, first lock portion and second lock portion interval are equipped with mutually cooperate cooperation groove and cooperation block, cooperation groove and cooperation block extend along the front and back direction, when cooperation block stretches into cooperation groove and first lock portion rear end face is close to or contacts second lock portion front end face, first lock portion and second lock portion interval magnetism attraction, the utility model has the advantages of being convenient for back bag to hang the assembly and can avoid the back bag to shake back and forth.

Description

Technical Field

[0001] This utility model relates to slow-moving vehicles such as mobility scooters and wheelchairs, and specifically to a backrest and backrest fixing structure for slow-moving vehicles. Background Technology

[0002] Wheelchairs, mobility scooters, and other slow-moving vehicles are prone to instability, wobbling, and wheel snagging if they have miscellaneous items attached to them. To ensure both essential storage needs and safety, storage baskets / shelves are often installed on these vehicles, as shown in the wheelchair disclosed in patent application number 202110205730. However, some slow-moving vehicles are foldable in their entirety or with foldable seats. If rigid storage baskets / shelves are used, they must be removed before folding the scooter or wheelchair. Therefore, some slow-moving vehicles use bags to store items. Since bags are easy to fold or compress, the entire vehicle or seat can be folded without removing the bag.

[0003] Patent application number 201821005791.7 discloses a wheelchair, including a wheelchair body and a seat belt. The wheelchair body has a first insert and a first fastener on each side. The seat belt includes a strap and a storage bag attached to the strap. The storage bag is small and lacks sufficient storage space. Furthermore, when used with the seat belt, if the ends of the seat belt are not locked to the wheelchair body, the storage bag may drag on the ground or hang on the side of the wheelchair seat.

[0004] Patent application number 202230783876.3 discloses a backpack for a mobility scooter. The backpack is detachable from the backrest via a zipper. The zipper's zipper closure path is n-shaped or square-shaped. When assembling the backpack, the zipper needs to be aligned first. To facilitate zipper alignment, the fabric strap on one side of the zipper needs to be relatively wide, which can easily lead to significant back-and-forth swaying of the backpack and noticeable impact with the seat back when the vehicle is moving at low speeds. If it is necessary to make the assembled backpack fit as closely as possible to the backrest to reduce the possibility of impact, the alignment precision of the zipper will be very high, making it difficult to align and close the zipper. Utility Model Content

[0005] The purpose of this utility model is to provide a backrest and backrest fixing structure for slow-speed vehicles that is easy to assemble and fix, and can prevent the backpack from swaying back and forth when the vehicle is moving slowly.

[0006] To achieve the above objectives, this utility model employs a backrest and seatback fixing structure for slow-moving vehicles, including a seatback and a backpack body located behind the seatback. The upper part of the backpack body is provided with several fixing members, each with a downwardly extending fixing portion at its front end. The upper part of the seatback is provided with an upwardly opening fixing groove that matches the fixing portion. A magnetic lock is provided between the lower end of the backpack body and the lower part of the seatback, the magnetic lock including a first locking part located on the backpack body and a second locking part located on the seatback. A mating groove and a mating block are provided between the first and second locking parts, extending in the front-rear direction. When the mating block extends into the mating groove and the rear end face of the first locking part approaches or contacts the front end face of the second locking part, the first and second locking parts are magnetically attracted.

[0007] This invention uses a dual fixing method of top hook and bottom magnetic lock, which eliminates the need for precise alignment like a zipper, making it more convenient to operate and especially suitable for the elderly or those with mobility impairments. The fixation is also more stable, eliminating concerns about large gaps between the backrest and the backpack body caused by excessively wide zipper straps, which could lead to the backpack swaying back and forth when the vehicle is moving at slow speeds.

[0008] The backpack body is made of soft material, and the top fastener is a thin hook. The magnetic lock is small in size, so the backpack body does not need to be removed when folding, and it does not affect the folding of the whole vehicle or seat. The outer edge of the backpack body can be the same size as the outer edge of the backrest to greatly increase the storage capacity. The mating groove and mating block play a positioning and guiding role, making it easy for users to assemble the backpack.

[0009] Preferably, the fastener is located at the upper end of the backpack body, and the fixing groove is located at the top of the backrest.

[0010] The backpack's weight is directly suspended from the backrest via the top edge, resulting in the shortest lever arm and preventing it from swaying back and forth while traveling. Furthermore, the fixing slot faces upwards, allowing the user to directly observe and easily align and assemble the fasteners.

[0011] Preferably, the left and right edges of the backrest extend forward, the cross-section of the backrest is arc-shaped, and there is a fixing groove on each of the left and right sides of the top of the backrest. The downward projection of the two fixing grooves forms a figure-eight shape. The backrest body is provided with fixing members on both the left and right sides, and the fixing part of the left fixing member and the fixing part of the right fixing member form an angle. The top fixing members are distributed in a figure-eight shape, forming a natural inward force that allows the backrest body to fit snugly against the backrest.

[0012] Preferably, the front side of the backrest is provided with a mesh fabric, and the outer edge of the backrest has an outer contour groove for inserting and fixing the edge of the mesh fabric. The fixing groove is located opposite to the outer contour groove and communicates with it. The fixing groove is hidden in the top contour groove of the backrest, and the magnetic lock is completely hidden between the backrest and the backrest, with a simple appearance and no exposed straps or hooks, avoiding snagging on clothing or foreign objects. Preferably, the mating groove is provided on the second locking part and opens to the rear; the mating block is provided at the first locking part and extends forward; the mating block has a downward-opening positioning groove at its front end; the second locking part is also provided with a positioning block, the lower end of which extends outside the second locking part; the upper end of which is located in the mating groove and has a positioning protrusion for extending into the positioning groove; a return spring is provided in the mating groove, and the positioning block has an upward tendency force under the action of the return spring.

[0013] After the mating block is inserted into the mating groove, the positioning block automatically rises under the action of the return spring, and the positioning protrusion engages with the positioning groove of the mating block, forming a mechanical lock in the vertical direction, ensuring mechanical locking in the event of bumps or failure of magnetic attraction. When it is necessary to remove the backpack, simply push down the lower end of the exposed positioning block (to compress the return spring), the positioning protrusion exits the positioning groove, the magnetic lock loses its mechanical limit, and it can be pulled out completely by pulling it slightly backward (to overcome the magnetic attraction).

[0014] Preferably, the mating groove includes a first mating groove and a second mating groove located circumferentially outside the first mating groove. The first mating groove is connected to the second mating groove. A plurality of limiting partitions for restricting the translation of the mating block are provided between the first mating groove and the second mating groove. The reset spring is located in the second mating groove. The positioning block is partially located in the second mating groove, and the portion of the positioning block located in the second mating groove is located relative to the lower side of the first mating groove.

[0015] Preferably, the positioning block is sleeved outside the limiting partition and located within the second mating groove, and the upper middle part of the positioning block has a guide groove that allows for clearance between the limiting partition and the first mating groove. This arrangement ensures a more stable position between the positioning block and the locking part. Preferably, the portion of the positioning block located above the first mating groove has a downwardly extending separation protrusion, which has a slope that gradually extends backward from bottom to top. When the positioning block moves downward, the slope of the separation protrusion contacts the mating block, thereby moving the lower end of the separation protrusion to the front of the mating block, thus facilitating overcoming the magnetic attraction between the first locking part and the second locking part, and facilitating separation from the backpack body.

[0016] This invention has the advantages of being easy to attach and install on a backpack and preventing the backpack from swaying back and forth. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the backrest and backpack after the present invention is fixed together.

[0018] Figure 2 This is a schematic diagram of the backrest structure of this utility model.

[0019] Figure 3 This is a structural schematic diagram of a backpack according to this utility model.

[0020] Figure 4 This is a structural schematic diagram of the second locking part of the backrest of this utility model.

[0021] Figure 5 This is a cross-sectional view of the first locking part and the second locking part of this utility model when they are engaged. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0023] Depend on Figures 1 to 3 As shown, the slow-speed vehicle backrest and backrest fixing structure of this embodiment includes two main parts: a backrest 1 and a backrest body 2. The backrest body 2 is installed on the rear side of the backrest 1 and is detachably and fixedly connected to the backrest 1. The backrest 1 adopts an arc-shaped cross-section design with the left and right edges extending forward, which meets the requirements of ergonomics. The front side of the backrest 1 is covered with a mesh fabric 11, and an outer contour groove 12 is provided at the outer edge of the backrest 1. The edge of the mesh fabric 11 is inserted into and fixed in the outer contour groove 12.

[0024] Depend on Figure 2 and Figure 4 As shown, the backpack body 2 is a bag-shaped structure with storage function. Its back is attached to the back side of the backrest 1. The upper part of the backpack body 2 is provided with two fasteners 21, and the lower part is provided with a first locking part 3. A magnetic lock is provided between the lower end of the backpack body 2 and the lower part of the backrest 1. The magnetic lock includes a first locking part 3 and a second locking part 4.

[0025] Depend on Figures 1 to 3 As shown, the fastener 21 is provided at the upper end of the backrest body 2. The fastener 21 can be made of plastic or metal and is fixed to the backrest body 2 by means of fusion fixation or fastener fixation. Each fastener 21 has a downwardly extending fixing part 211 at its front end, which is used to cooperate with the fixing groove 13 on the backrest 1.

[0026] The fixing groove 13 is located on the top side of the backrest 1, forming an upward-opening groove structure. A fixing groove 13 is provided on each of the left and right sides of the top of the backrest 1. The projections of the two fixing grooves 13 on the horizontal plane form a figure-eight shape to accommodate the structure of the curved backrest 1. Correspondingly, fixing members 21 are provided on both the left and right sides of the backrest body 2, and the fixing part 211 of the left fixing member 21 and the fixing part 211 of the right fixing member 21 form an angle that matches the figure-eight shape. To facilitate the installation of the mesh fabric, the fixing groove 13 is located opposite to the rear side of the outer contour groove 12 and communicates with the outer contour groove 12, allowing the fixing groove 13 and the outer contour groove 12 to be integrally formed.

[0027] The first locking part 3 is located at the lower end of the backpack body 2 and can be fixed to the backpack body 2 by means of fasteners. The first locking part 3 has a magnetic element (such as a permanent magnet) embedded in it, and its front end face has a forward-extending mating block 31. The mating block 31 has a downward-opening positioning groove 311 at a position off the front end.

[0028] Depend on Figure 4 and Figure 5 As shown, the second locking part 4 is located at the lower part of the backrest 1, corresponding to the position of the first locking part 3. The second locking part 4 has a magnetic element 410 (such as an iron sheet or a permanent magnet with opposite magnetic poles) embedded within it, which attracts the magnetic element of the first locking part 3. The second locking part 4 has a rearward-opening mating groove 41 for receiving the mating block 31 of the first locking part 3. When the mating block 31 extends into the mating groove 41, and the rear end face of the first locking part 3 approaches or contacts the front end face of the second locking part 4, a magnetic attraction is generated between the first locking part 3 and the second locking part 4, firmly attaching the lower part of the backpack body 2 to the backrest 1.

[0029] Depend on Figure 2 , Figure 4 and Figure 5 As shown, the mating groove 41 adopts a composite groove structure, including a first mating groove 411 located in the center and a second mating groove 412 located on the outer periphery of the first mating groove 411. The first mating groove 411 and the second mating groove 412 are interconnected. Several limiting baffles 413 are provided between the first mating groove 411 and the second mating groove 412 to restrict the lateral translation of the mating block 31, ensuring that the mating block 31 can only be inserted in the front-back direction. The thickness of the baffles 413 in the front-back direction is less than the distance of the mating groove 41 in the front-back direction.

[0030] Depend on Figure 2 and Figure 5As shown, the positioning block 5 is movably disposed within the second mating groove 412 and sleeved on the outside of the limiting partition 413. The positioning block 5 has an annular portion located in the second mating groove 412, and the lower end of the annular portion has a handle 50 extending downward to the lower part of the second locking part 4 for easy operation by the user; the positioning block 5 has an upwardly extending positioning protrusion 51 in the portion located on the lower side of the limiting partition 413, and the positioning protrusion 51 matches the positioning groove 311 on the mating block 31.

[0031] A return spring (not shown in the figure) is disposed within the second mating groove 412 and sleeved on the upper end of the handle 50. The lower end of the return spring abuts against the bottom wall of the second mating groove 412, and the upper end abuts against the annular portion of the positioning block 5, so that the positioning block 5 has an upward tendency force under the action of the return spring 6. A guide groove 52 is provided in the middle of the positioning block 5 to allow clearance between the limiting partition 413 and the first mating groove 411, ensuring that the positioning block 5 can move smoothly up and down.

[0032] To facilitate unlocking, the portion of the positioning block 5 located on the upper side of the first mating groove 411 has a downwardly extending separation protrusion 53, which has a slope 531 that gradually extends backward from bottom to top. When it is necessary to disassemble the backpack body 2, pull down the handle 50 of the positioning block 5. The slope 531 of the positioning block 5 contacts the rear end face of the mating block 31, generating a forward pushing force. Combined with the weakening of the magnetic attraction, the mating block 31 can be easily pushed out of the mating groove 41.

[0033] First, align and insert the fixing part 211 at the upper end of the backpack body 2 into the fixing groove 13 at the top of the backrest 1, so that the upper part of the backpack body 2 is suspended on the backrest 1; then press the lower part of the backpack body 2 towards the backrest 1, so that the mating block 31 of the first locking part 3 is inserted into the mating groove 41 of the second locking part 4. Under the action of magnetic attraction, the first locking part 3 and the second locking part 4 attract each other, and at the same time, the positioning block 5 moves upward under the action of the return spring 6, and its positioning protrusion 51 is engaged in the positioning groove 311 of the mating block 31, so as to achieve reliable locking.

[0034] The user applies force to the handle 50 by pressing or pulling down, causing the positioning block 5 to move downward against the force of the return spring, and the positioning protrusion 51 to disengage from the positioning groove 311; at the same time, the inclined surface 531 of the separation protrusion 53 contacts the mating block 31, generating a forward separation force. When the pressing force is large enough, the mating block 31 disengages from the mating groove 41, separating the lower part of the backpack body 2 from the backrest 1. Then, the backpack body 2 is lifted up, causing the fixing part 211 to disengage from the fixing groove 13, thus completing the overall disassembly.

[0035] This utility model discloses a backrest and seatback fixing structure for slow-moving vehicles. Through a combination of upper insertion fixing and lower magnetic locking, it achieves quick installation and removal of the backrest and seatback. The V-shaped layout of the fixing parts and fixing slots conforms to ergonomic principles, improving structural stability. The magnetic lock structure is simple and reliable, and the positioning protrusion effectively prevents accidental detachment during driving. The overall structure is compact and can be operated without additional tools, significantly improving the user experience.

Claims

1. A backrest and backrest fixing structure for slow-moving vehicles, comprising a backrest and a backrest body located on the back side of the backrest, characterized in that: The upper part of the backpack body is provided with several fasteners, each fastener having a downwardly extending fastening portion at its front end. The upper part of the backrest is provided with an upwardly opening fastening groove that matches the fastening portion. A magnetic lock is provided between the lower end of the backpack body and the lower part of the backrest. The magnetic lock includes a first locking portion located on the backpack body and a second locking portion located on the backrest. A mating groove and a mating block are provided between the first locking portion and the second locking portion, and the mating groove and the mating block extend in the front-back direction. When the mating block extends into the mating groove and the rear end face of the first locking portion approaches or contacts the front end face of the second locking portion, the first locking portion and the second locking portion are magnetically attracted to each other.

2. The backrest and backrest fixing structure for slow-moving vehicles according to claim 1, characterized in that: The fastener is located at the upper end of the backpack body, and the fixing groove is located at the top of the backrest.

3. The backrest and backrest fixing structure for slow-moving vehicles according to claim 1 or 2, characterized in that: The left and right edges of the backrest extend forward, the cross-section of the backrest is arc-shaped, and there is a fixing groove on each of the left and right sides of the top of the backrest. The downward projection of the two fixing grooves forms a figure-eight shape. The backrest body is provided with fixing parts on both the left and right sides, and the fixing part of the left fixing part and the fixing part of the right fixing part form an angle.

4. The backrest and backrest fixing structure for slow-moving vehicles according to claim 1 or 2, characterized in that: The backrest is provided with a mesh fabric on the front side, and an outer contour groove is provided at the outer edge of the backrest for inserting and fixing the edge of the mesh fabric. The fixing groove is located opposite to the outer contour groove and is connected to the outer contour groove.

5. The backrest and backrest fixing structure for slow-moving vehicles according to claim 1, characterized in that: The mating groove is provided on the second locking part and opens to the rear. The mating block is provided at the first locking part and extends forward. The mating block has a downward opening positioning groove at its front end. The second locking part is also provided with a positioning block. The lower end of the positioning block extends outside the second locking part. The upper end of the positioning block is located in the mating groove and has a positioning protrusion for extending into the positioning groove. A return spring is provided in the mating groove. Under the action of the return spring, the positioning block has an upward tendency force.

6. The backrest and backrest fixing structure for slow-moving vehicles according to claim 5, characterized in that: The mating groove includes a first mating groove and a second mating groove located circumferentially outside the first mating groove. The first mating groove is connected to the second mating groove. A plurality of limiting partitions for restricting the translation of the mating block are provided between the first mating groove and the second mating groove. The reset spring is located in the second mating groove. The positioning block is partially located in the second mating groove, and the portion of the positioning block located in the second mating groove is located relative to the lower side of the first mating groove.

7. The backrest and backrest fixing structure for slow-moving vehicles according to claim 6, characterized in that: The positioning block is sleeved outside the limiting partition and located inside the second mating groove. The upper middle part of the positioning block is provided with a guide groove that makes way for the limiting partition and the first mating groove.

8. The backrest and backrest fixing structure for slow-moving vehicles according to claim 7, characterized in that: The portion of the positioning block located on the upper side of the first mating groove is provided with a downwardly extending separation protrusion, the separation protrusion having an inclined surface that gradually extends backward from bottom to top.

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