Seat with storage type trundles

Abstract

The utility model discloses a seat with storage type trundles. The seat comprises a seat bottom plate, a backrest vertical plate arranged on the rear side of the seat bottom plate and side vertical plates arranged above the two sides of the seat bottom plate. Side plate cavities are formed in the front lower ends and the rear lower ends of the side vertical plates; a storage type trundle structure is arranged in a cavity of the side plate; the storage type trundle structure comprises a trundle frame rotationally connected with the lower end of the side vertical plate and a trundle rotationally connected with the trundle frame. The trundle frame comprises a frame body provided with an overturning pin shaft and two connecting arms extending outwards from one side of the frame body. The trundles are arranged between the two connecting arms and are rotationally connected with the connecting arms through rotating shafts; the frame body is further provided with at least two positioning holes, and the side vertical plates are further provided with positioning shafts corresponding to the positioning holes. And the side vertical plates are provided with positioning shaft holes for the positioning shafts to pass through. According to the utility model, the trundles can be accommodated in the cavities of the side plates, so that the seat can be used in a vehicle without interference, and the trundles can also extend out of the lower part of the bottom plate of the seat to be used as a moving tool.

Description

Technical Field

[0001] This utility model relates to a seat structure, and more specifically, a seat with retractable casters. Background Technology

[0002] Welfare seats for people with mobility impairments are typically without casters and are fixedly attached to the vehicle. Wheelchairs or similar devices are needed to transport these individuals from the vehicle to indoor spaces such as bedrooms. However, for people with temporary mobility impairments (such as sprains or surgery), who do not have a regular wheelchair, their families incur additional costs for purchasing or renting one. Furthermore, service vehicles equipped with welfare seats are usually offered on a rental basis. Therefore, equipping welfare seats with casters allows them to be detached from the vehicle for movement outside. Searching using the keywords "abstract = ((telescopic or foldable) and (wheels or casters) and (seat or wheelchair or welfare chair))" yields several relevant patents, including one titled "Car Seat for the Elderly," application number CN201320634630.5. This seat is easily detachable from the car for wheelchair use. It features seat casters, foldable casters, and a caster locking mechanism. It also includes foldable foot pedals, telescopic handles, and foldable armrests, all locked in pre-designed recessed slots. A rechargeable battery and servo motor are installed at the bottom of the seat. The casters are connected to the seat via a folding linkage, and a quick-clamping device secures the seat to the vehicle body during normal use. When the seat needs to be removed for wheelchair use, it is detached via the quick-clamping mechanism, and the casters are unfolded via the folding linkage. The telescopic handles can be pulled to their maximum position to function as a reclining chair. This facilitates users accompanying elderly individuals during extended outdoor activities. However, in this type of seat, the casters are always exposed as a support structure, making it incompatible with the rotating and telescopic structures at the bottom of the welfare seat. Therefore, it is necessary to develop a seat with retractable casters that can be stored away when used inside the vehicle to accommodate the rotating and telescopic structures at the bottom of the welfare seat, and then extended when used as a mobility tool outside the vehicle. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in the prior art by providing a seat with retractable casters.

[0004] The objective of this utility model is achieved through the following technical solutions:

[0005] A seat with retractable casters includes a seat base, a backrest upright plate located at the rear of the seat base, and side upright plates located above both sides of the seat base. The lower front and lower rear ends of each side upright plate have side plate cavities. Each side plate cavity houses a retractable caster structure. The retractable caster structure includes a caster frame rotatably connected to the lower end of the side upright plate, and casters rotatably connected to the caster frame. The caster frame includes a frame body with a flip-down pin, and two connecting arms extending outward from one side of the frame body. The casters are mounted on the two connecting arms. The connecting arms are rotatably connected to each other via a pivot; the frame body is also provided with at least two positioning holes, and the side plate is also provided with a positioning shaft corresponding to the positioning holes; when the positioning shaft is placed in the positioning hole, the caster is housed in the cavity of the side plate or extends out below the seat base; when the positioning shaft is disengaged from the positioning hole, the caster rotates freely between the cavity of the side plate and below the seat base under the drive of the caster frame; the side plate is provided with a positioning shaft hole for the positioning shaft to pass through.

[0006] Preferably, the frame body extends in a direction perpendicular to the connecting arm and on both sides of the flip pin, so as to provide two positioning holes; there are two positioning shafts; the outer side of the side plate is also provided with a connecting plate for connecting the two positioning shafts.

[0007] Preferably, the connecting plate is elastically connected to the inner side of the side plate by a tension spring, and the flip pin is provided with a tension spring through hole for the tension spring to pass through.

[0008] Preferably, the outer side of the side plate also includes a receiving groove for embedding the connecting plate.

[0009] Preferably, the connecting plate has grooves on its upper and lower sides for accommodating the operator's hands.

[0010] Preferably, it also includes a bearing disposed between the pivot and the caster.

[0011] Preferably, the rotating shaft includes an inner half-shaft and an outer half-shaft that are threadedly connected to each other.

[0012] Preferably, the flip pin includes an inner half pin and an outer half pin that are threaded together.

[0013] Preferably, the inner half-pin is provided with the tension spring through hole, and the inner end of the tension spring through hole is provided with an inner tension spring pin for fixing the tension spring; the connecting plate is provided with a through hole for passing through the tension spring, and the outer end of the through hole is provided with an outer tension spring pin for fixing the tension spring.

[0014] Compared with existing technologies, the advantages of this utility model are as follows: The seat of this utility model has a side plate cavity. By flipping the caster bracket, the casters can be stored in the side plate cavity, allowing the seat to be used inside the vehicle without interference. Alternatively, the casters can extend under the seat base and be used as a mobility tool. Furthermore, the use of two positioning shafts provides better connection strength when the caster bracket is fixed. The use of tension springs allows the operator to move the connecting plate outwards during storage or extension. After the caster bracket rotates, there is no need to continuously pull the connecting plate outwards; upon 180-degree rotation, the two positioning shafts automatically engage with the positioning holes under the spring force of the tension springs, making operation convenient and quick. The use of mutually threaded inner and outer half-shafts facilitates production, installation, and maintenance. The use of mutually threaded inner and outer half-pins also facilitates production, installation, and maintenance. Finally, the inner half-pin has a tension spring through hole for easy installation and maintenance. Attached Figure Description

[0015] Figure 1 This is a side view of a specific embodiment of the seat with retractable casters of this utility model (the casters are in the retracted state);

[0016] Figure 2 for Figure 1 AA section view;

[0017] Figure 3 for Figure 1 BB section view;

[0018] Figure 4 This is a side view of a specific embodiment of the seat with retractable casters of this utility model (the casters are in the extended state).

[0019] Figure Labels

[0020] S Seat 10 Seat Base

[0021] 11 Backrest uprights 20 Side uprights

[0022] 200 Side plate cavity 201 Positioning shaft hole

[0023] 202 Receiving slot 30 Retractable caster structure

[0024] 31 Caster Frame 310 Frame Body

[0025] 311 Connecting arm; 312 Positioning hole

[0026] 32 casters, 40 tilt pins

[0027] 400 tension spring through hole 41 inner half pin

[0028] 419 Tension spring inner pin, 42 outer half pin.

[0029] 50 swivel shaft 500 bearing

[0030] 51 Inner half-shaft 52 Outer half-shaft

[0031] 60 connecting plate with 600 through holes

[0032] 601 Groove 61 Positioning Shaft

[0033] 62 tension spring, 69 tension spring (outlet) Detailed Implementation

[0034] The technical solution of this utility model will be clearly and completely described below through the following embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0035] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0036] It should also be understood that the terminology used in this specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in this specification of embodiments of the present invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0037] like Figures 1 to 4As shown, the present invention relates to a seat S with retractable casters, comprising a seat base 10, a backrest upright 11 located on the rear side of the seat base 10, and side uprights 20 located on the upper sides of both sides of the seat base 10; the lower front end and the lower rear end of the side uprights 20 are provided with side plate cavities 200; each side plate cavity 200 is provided with a retractable caster structure 30 (a total of four); the retractable caster structure 30 includes a caster frame 31 rotatably connected to the lower end of the side uprights 20, and casters 32 rotatably connected to the caster frame 31; the caster frame 31 includes a frame body 310 with a flip pin 40, and two connecting pins extending outward from one side of the frame body 310. The frame consists of two connecting arms 311 and two casters 32, which are rotatably connected to the connecting arms 311 via a pivot 50. The frame body 310 also has two positioning holes 312, and the side plate 20 has a positioning shaft 61 corresponding to the positioning holes 312. When the positioning shaft 61 is placed in the positioning hole 312, the caster 32 is retracted into the side plate cavity 200 or extends below the seat base 10. When the positioning shaft 61 is disengaged from the positioning hole 312, the caster 32 rotates freely between the side plate cavity 200 and below the seat base 10 under the drive of the caster frame 31. The side plate 20 has a positioning shaft hole 201 for the positioning shaft 61 to pass through. Preferably, the two positioning holes and the flip pin are on the same plane, and when the caster frame is rotated 180 degrees, the two positioning holes interchange positions.

[0038] More specifically, the frame body 310 extends in a direction perpendicular to the connecting arm 311 and to the lateral sides of the flip pin 40, so as to have two positioning holes 312; there are two positioning shafts 61; the outer side of the side plate 20 is also provided with a connecting plate 60 for connecting the two positioning shafts 61.

[0039] More specifically, the connecting plate 60 is elastically connected to the inner side of the side plate 20 by a tension spring 62, and the flip pin 40 is provided with a tension spring through hole 400 for the tension spring 62 to pass through.

[0040] More specifically, the outer side of the side plate 20 also includes a receiving groove 202 for embedding the connecting plate 60.

[0041] More specifically, the upper and lower sides of the connecting plate 60 are provided with grooves 601 for accommodating the operator's hands.

[0042] More specifically, it also includes a bearing 500 located between the pivot 50 and the caster 32.

[0043] More specifically, the shaft 50 includes an inner half-shaft 51 and an outer half-shaft 52 that are threadedly connected to each other.

[0044] More specifically, the flip pin 40 includes an inner half pin 41 (external thread in the figure) and an outer half pin 42 (internal thread through hole in the figure) that are threaded together.

[0045] More specifically, the inner half pin 41 is provided with the aforementioned tension spring through hole 400, and the inner end of the tension spring through hole 400 is provided with a tension spring inner pin 419 for fixing the tension spring 62; the connecting plate 60 is provided with a through hole 600 for passing through the tension spring 62, and the outer end of the through hole 600 is provided with a tension spring outer pin 69 for fixing the tension spring 62.

[0046] More specifically, the interior of the side panel 20 is made of two parallel metal plates connected by screws or welded together. This structure makes it easy to form a cavity in the side panel, and the exterior is covered with a layer of flexible material, which is comfortable to touch when in use.

[0047] In other embodiments, there may be only one positioning axis.

[0048] This invention is particularly suitable for use with welfare seats. In use, first extend the welfare seat from inside the vehicle to the ground. Pinch the groove on the connecting plate and pull out the positioning shaft. Then, rotate the caster bracket 180 degrees out of the side panel cavity so that the casters face downwards towards the ground. Return the connecting plate to its original position (the positioning shaft is inserted into the positioning hole). Continue extending the welfare seat outwards and downwards until the casters touch the ground. Then, separate the welfare seat from the telescopic support structure; the welfare seat becomes a movable seat. For storage, move the welfare seat to be with the telescopic support structure. Pinch the groove on the connecting plate and pull out the positioning shaft. Then, rotate the caster bracket 180 degrees upwards towards the side panel cavity to store it. Return the connecting plate to its original position (the positioning shaft is inserted into the positioning hole). This completes the storage process.

[0049] This invention can also be used for the interior seats of mobility scooters for the elderly. The seats can be connected to the vehicle body using common methods such as screws.

[0050] In summary, this utility model's seat features a side panel cavity. By flipping the caster bracket, the casters can be stored within the side panel cavity, allowing the seat to be used inside the vehicle without interference. Alternatively, the casters can extend from under the seat base for use as a mobility tool. Furthermore, the use of two positioning shafts enhances the connection strength of the caster bracket during fixation. The inclusion of tension springs allows the operator to easily and quickly rotate the caster bracket after first moving the connecting plate outwards, eliminating the need to continuously pull the connecting plate outwards. Upon 180-degree rotation, the two positioning shafts automatically engage with the positioning holes under the spring force of the tension springs. The use of mutually threaded inner and outer half-shafts facilitates production, installation, and maintenance. The use of mutually threaded inner and outer half-pins further facilitates production, installation, and maintenance. Finally, the inner half-pin has a tension spring through hole for easy installation and maintenance.

[0051] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A seat with retractable casters, comprising a seat base, a backrest upright plate disposed on the rear side of the seat base, and side upright plates disposed on the upper sides of both sides of the seat base; characterized in that The lower front and lower rear ends of the side panel are both provided with side panel cavities; each side panel cavity is provided with a retractable caster structure; the retractable caster structure includes a caster frame rotatably connected to the lower end of the side panel, and a caster rotatably connected to the caster frame; the caster frame includes a frame body with a flip pin, and two connecting arms extending outward from one side of the frame body; the caster is located between the two connecting arms and is rotatably connected to the connecting arms via a pivot; the frame body is also provided with at least two positioning holes, and the side panel is also provided with positioning shafts corresponding to the positioning holes; when the positioning shaft is placed in the positioning hole, the caster is retracted into the side panel cavity or extends out below the seat base; when the positioning shaft is disengaged from the positioning hole, the caster, driven by the caster frame, rotates freely between the side panel cavity and below the seat base; the side panel is provided with a positioning shaft hole for the positioning shaft to pass through.

2. The seat with retractable casters according to claim 1, characterized in that... The frame body extends in a direction perpendicular to the connecting arm and on both sides of the flip pin, so as to have two positioning holes; there are two positioning shafts; the outer side of the side plate is also provided with a connecting plate for connecting the two positioning shafts.

3. The seat with retractable casters according to claim 2, characterized in that... The connecting plate is elastically connected to the inner side of the side plate by a tension spring, and the flip pin is provided with a tension spring through hole for the tension spring to pass through.

4. The seat with retractable casters according to claim 3, characterized in that... The outer side of the side plate also includes a receiving groove for embedding the connecting plate.

5. The seat with retractable casters according to claim 4, characterized in that... The connecting plate has grooves on its upper and lower sides to accommodate the operator's hands.

6. The seat with retractable casters according to claim 5, characterized in that... It also includes a bearing located between the pivot and the caster.

7. The seat with retractable casters according to claim 6, characterized in that... The shaft includes an inner half-shaft and an outer half-shaft that are threaded together.

8. The seat with retractable casters according to claim 5, characterized in that... The flip pin includes an inner half pin and an outer half pin that are threaded together.

9. The seat with retractable casters according to claim 8, characterized in that... The inner half-pin is provided with the tension spring through hole, and the inner end of the tension spring through hole is provided with an inner tension spring pin for fixing the tension spring; the connecting plate is provided with a through hole for passing through the tension spring, and the outer end of the through hole is provided with an outer tension spring pin for fixing the tension spring.

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