A 3D printing rapid prototyping bicycle seat cushion convenient to replace

Abstract

The application discloses a 3D printing rapid forming bicycle cushion convenient to replace, which comprises a bicycle cushion body, a mounting positioning block, a cushion protection layer, a cushion reinforcing plate and an auxiliary replacement support, the inside of the bicycle cushion body is composed of a printing structure layer and the cushion protection layer, and the cushion protection layer is arranged on the outside of the printing structure layer. The auxiliary replacement clamp block is arranged, a fixing screw is screwed between the auxiliary connecting screw holes on the lower sides of the bicycle cushion body and the positioning screw holes on the two sides of the cushion reinforcing plate, the auxiliary replacement support is installed on the lower surface of the bicycle cushion body, the auxiliary replacement screw rod at the lower end position of the auxiliary replacement support is rotated by forwardly screwing the auxiliary replacement knob, the auxiliary replacement screw ring at the two side positions of the auxiliary replacement screw rod pulls the auxiliary replacement clamp block to clamp the bicycle connecting rod on the inside, and thus the bicycle cushion is prevented from rotating and falling off in the riding process.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bicycle seat cushion, and particularly relates to a 3D printing rapid prototyping bicycle seat cushion convenient to replace. BACKGROUND

[0002] 3D printing (3DP) is a kind of rapid prototyping technology, also known as additive manufacturing, which is a technology for constructing objects through layer-by-layer printing based on digital model files and using powder-like metal or plastic and other bondable materials. 3D printing is usually realized by using a digital technology material printer. It is often used in mold manufacturing, industrial design and other fields to manufacture models, and is gradually used for direct manufacturing of some products. Parts printed by using this technology have been used. The technology is applied in the fields of jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automobile, aerospace, dental and medical industry, education, geographic information system, civil engineering, gun and other fields. The bicycle seat cushion is a bicycle accessory directly contacted with the buttocks during riding, which is composed of four parts and can be divided into two types. The narrow and long hard seat cushion, which is commonly used in sports bicycles, is designed for high-speed cruising. The wide and soft comfortable seat cushion, which is commonly used in entry-level bicycles or leisure-oriented bicycles, is designed for slow cruising.

[0003] At present, part of the bicycle seat cushion is processed and prepared by using 3D printing. The following problems are proposed for the 3D printing bicycle seat cushion of the prior art:

[0004] 1. The 3D printing bicycle seat cushion of the prior art is troublesome to install with the bicycle seat cushion connecting rod. Although there is a seat cushion installed by using a threaded screw connection on the market, the seat cushion of this type does not have a reinforcing structure inside, and the seat cushion is easy to rotate during riding, thereby causing the bicycle seat cushion to fall off;

[0005] 2. The 3D printing bicycle seat cushion of the prior art does not have a structure convenient to replace inside. When replacing the bicycle seat cushion, the screws between the bicycle seat cushion and the bicycle seat cushion connecting rod need to be removed, which is troublesome;

[0006] 3. The internal structure of the 3D printing bicycle seat cushion of the prior art is relatively simple. In rainy days, rainwater easily penetrates into the seat cushion. The 3D printing material is easily broken under the soaking of rainwater, thereby affecting the normal use of the bicycle seat cushion. SUMMARY

[0007] The technical problem to be solved by the present application is to overcome the defects of the prior art and provide a 3D printing rapid prototyping bicycle seat cushion convenient to replace, so as to solve the problems proposed in the background.

[0008] In order to achieve the above object, the present application provides the following technical scheme: A 3D printing rapid prototyping bicycle seat cushion convenient to replace, comprising a bicycle seat cushion body, a mounting positioning block, a seat cushion protective layer, a seat cushion reinforcing plate and an auxiliary replacement support, the inside of the bicycle seat cushion body is composed of a printing structure layer and a seat cushion protective layer, the seat cushion protective layer is arranged outside the printing structure layer, the lower surface of the bicycle seat cushion body is provided with a seat cushion reinforcing plate, both sides of the bicycle seat cushion body are provided with auxiliary connecting screw holes, both sides of the seat cushion reinforcing plate are provided with positioning screw holes, the auxiliary connecting screw holes and the positioning screw holes are threadedly connected with a fixing screw in the middle, the lower end of the seat cushion reinforcing plate is fixedly connected with an auxiliary replacement support, both sides of the lower end of the auxiliary replacement support are fixedly connected with support positioning plates, the inside of two support positioning plates is rotatably connected with auxiliary replacement screws, both sides of the auxiliary replacement screws are provided with auxiliary replacement screw rings, both auxiliary replacement screw rings are threadedly connected with the auxiliary replacement screws, the outer end of the auxiliary replacement screw is drivingly connected with an auxiliary replacement knob, the auxiliary replacement knob is rotatably connected outside the support positioning plate, the lower end of both auxiliary replacement screw rings is fixedly connected with a movable connecting plate, and the lower end of both movable connecting plates is fixedly connected with an auxiliary replacement clamping block.

[0009] Preferably, the inside surface of the auxiliary replacement clamping block is provided with an arc-shaped connecting groove, and the inside surface of the arc-shaped connecting groove is provided with a plurality of protruding contact points.

[0010] Preferably, the inside surface of the auxiliary replacement clamping block is provided with an arc-shaped connecting groove, and the inside surface of the arc-shaped connecting groove is provided with a plurality of protruding contact points.

[0011] Preferably, the inside surface of the auxiliary replacement clamping block is provided with an arc-shaped connecting groove, and the inside surface of the arc-shaped connecting groove is provided with a plurality of protruding contact points.

[0012] Preferably, the inside surface of the auxiliary replacement clamping block is provided with an arc-shaped connecting groove, and the inside surface of the arc-shaped connecting groove is provided with a plurality of protruding contact points.

[0013] Preferably, the inside surface of the auxiliary replacement clamping block is provided with an arc-shaped connecting groove, and the inside surface of the arc-shaped connecting groove is provided with a plurality of protruding contact points.

[0014] Preferably, the inside surface of the auxiliary replacement clamping block is provided with an arc-shaped connecting groove, and the inside surface of the arc-shaped connecting groove is provided with a plurality of protruding contact points.

[0015] Preferably, the inside surface of the auxiliary replacement clamping block is provided with an arc-shaped connecting groove, and the inside surface of the arc-shaped connecting groove is provided with a plurality of protruding contact points.

[0016] Preferably, the inside surface of the auxiliary replacement clamping block is provided with an arc-shaped connecting groove, and the inside surface of the arc-shaped connecting groove is provided with a plurality of protruding contact points.

[0017] Preferably, the upper surface of the bicycle seat body is provided with a seat external groove, the lower surface of the bicycle seat body is provided with a seat internal groove, the seat internal groove is fixedly connected with an installation positioning block inside, and the installation positioning block is provided with an installation fixed screw hole inside.

[0018] Compared with the prior art, the application provides a 3D printing rapid forming bicycle seat which is convenient to replace and has the following beneficial effects:

[0019] 1、The auxiliary replacement clamp is installed on the lower surface of the bicycle seat body by screwing the fixed screws between the auxiliary connecting screw holes on both sides of the lower end of the bicycle seat body and the positioning screw holes on both sides of the seat reinforcing plate, the auxiliary replacement screw rod at the lower end of the auxiliary replacement support is rotated by forwardly turning the auxiliary replacement knob, the auxiliary replacement screw ring at both sides of the auxiliary replacement screw rod pulls the auxiliary replacement clamp to clamp the bicycle connecting rod inwardly, so that the bicycle seat is prevented from rotating and falling off during riding;

[0020] 2、The installation positioning block is inserted into the outside of the bicycle connecting rod at the lower end of the bicycle seat during installation of the bicycle seat and the bicycle connecting rod, the installation positioning block is screwed to the position of the bicycle connecting rod by turning the bicycle seat body, so that the bicycle seat and the bicycle are quickly installed, and the auxiliary replacement knob is turned in reverse during subsequent disassembly, so that the auxiliary replacement clamp is separated from the bicycle connecting rod, the bicycle seat body is turned in reverse at this time, the installation positioning block at the lower end of the bicycle seat body is separated from the bicycle connecting rod, the seat is removed, and the seat is convenient to replace subsequently;

[0021] 3、The seat protection layer is added outside the printing structure layer, the seat protection layer is composed of a seat waterproof layer, a seat heat insulation layer and a seat buffer layer, rainwater is prevented from penetrating into the seat by the seat waterproof layer, so that the rainwater is prevented from contacting the printing structure layer, and the printing structure layer is well protected. DETAILED DESCRIPTION

[0022] The accompanying drawings are used to provide a further understanding of the application, and constitute a part of the specification, which is used together with embodiments of the application to explain the application, and do not constitute a limitation to the application, in which:

[0023] Figure 1 A structure diagram of the 3D printing rapid forming bicycle seat convenient to replace is provided.

[0024] Figure 2A bottom view of a 3D printing rapid prototyping bicycle seat cushion convenient to replace provided by the present application;

[0025] Figure 3 A bottom view of a 3D printing rapid prototyping bicycle seat cushion convenient to replace provided by the present application after installation of the seat cushion and the seat cushion reinforcing plate;

[0026] Figure 4 An internal sectional view of a 3D printing rapid prototyping bicycle seat cushion convenient to replace provided by the present application;

[0027] Figure 5 An internal structure diagram of a seat cushion protective layer in a 3D printing rapid prototyping bicycle seat cushion convenient to replace provided by the present application;

[0028] Figure 6 A front view of an auxiliary replacement support in a 3D printing rapid prototyping bicycle seat cushion convenient to replace provided by the present application;

[0029] Figure 7 A 3D printing rapid prototyping bicycle seat cushion convenient to replace provided by the present application Figure 6 An enlarged view of A in the 3D printing rapid prototyping bicycle seat cushion convenient to replace provided by the present application;

[0030] Figure 8 A top view of an auxiliary replacement clamp in a 3D printing rapid prototyping bicycle seat cushion convenient to replace provided by the present application;

[0031] In the figure: 1, bicycle seat body; 2, installation positioning block; 3, installation fixed screw hole; 4, auxiliary connecting screw hole; 5, seat cushion built-in groove; 6, printing structure layer; 7, seat cushion protective layer; 8, seat cushion waterproof layer; 9, seat cushion heat insulation layer; 10, seat cushion buffer layer; 11, seat cushion reinforcing plate; 12, positioning screw hole; 13, auxiliary replacement support; 14, support bottom position sliding groove; 15, sliding groove built-in sliding block; 16, auxiliary replacement screw rod; 17, auxiliary replacement screw ring; 18, support positioning plate; 19, auxiliary replacement clamp; 20, arc-shaped connecting groove; 21, protruding contact point; 22, auxiliary replacement knob; 23, screw rod middle ring; 24, seat cushion external groove; 25, movable connecting plate; 26, fixed screw. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0033] Please refer to Figures 1-8The application provides the following technical scheme: a 3D printing rapid prototyping bicycle cushion convenient to replace, which comprises a bicycle cushion body 1, a mounting positioning block 2, a cushion protection layer 7, a cushion reinforcing plate 11 and an auxiliary replacement support 13, the inside of the bicycle cushion body 1 is composed of a printing structure layer 6 and the cushion protection layer 7, the cushion protection layer 7 is arranged on the outside of the printing structure layer 6, the lower surface of the bicycle cushion body 1 is provided with the cushion reinforcing plate 11, both sides of the bicycle cushion body 1 are provided with auxiliary connecting screw holes 4, both sides of the cushion reinforcing plate 11 are provided with positioning screw holes 12, the auxiliary connecting screw holes 4 and the positioning screw holes 12 are threadedly connected with a fixing screw 26 in the middle, the lower end of the cushion reinforcing plate 11 is fixedly connected with the auxiliary replacement support 13, the lower end of the auxiliary replacement support 13 is fixedly connected with support positioning plates 18 on both sides, the inside of the two support positioning plates 18 is rotatably connected with auxiliary replacement screws 16, the two sides of the auxiliary replacement screws 16 are provided with auxiliary replacement screw rings 17, the two auxiliary replacement screw rings 17 are threadedly connected with the auxiliary replacement screws 16, the outer end of the auxiliary replacement screws 16 is drivingly connected with an auxiliary replacement knob 22, the auxiliary replacement knob 22 is rotatably connected to the outside of the support positioning plate 18, the lower end of the two auxiliary replacement screw rings 17 is fixedly connected with movable connecting plates 25, and the lower end of the two movable connecting plates 25 is fixedly connected with auxiliary replacement clamping blocks 19.

[0034] It should be noted that the auxiliary replacement knob 22 is twisted forward, the auxiliary replacement screw 16 at the lower end of the auxiliary replacement support 13 is rotated, the auxiliary replacement screw ring 17 at the two sides of the auxiliary replacement screw 16 pulls the auxiliary replacement clamping block 19 to clamp the bicycle connecting rod inward, so that the bicycle cushion is prevented from rotating and falling off in the process of riding.

[0035] In the application, preferably, the inside surface of the auxiliary replacement clamping block 19 is provided with an arc-shaped connecting groove 20, and the inside surface of the arc-shaped connecting groove 20 is provided with a plurality of protruding contact points 21.

[0036] In the application, preferably, the inside of the lower end of the auxiliary replacement support 13 is provided with a support bottom position sliding groove 14, both sides of the inside of the support bottom position sliding groove 14 are slidingly connected with sliding groove built-in sliding blocks 15, and the lower end of the sliding groove built-in sliding block 15 is fixedly connected with the auxiliary replacement screw ring 17.

[0037] In the application, preferably, the auxiliary replacement screw 16 is provided with a screw middle ring 23 in the middle, the outer surface of the auxiliary replacement screw 16 is provided with a left thread on one side and a right thread on the other side, and the screw middle ring 23 is located at the intersection position of the left thread and the right thread.

[0038] Preferably, the cushion protection layer 7 is composed of the cushion waterproof layer 8, the cushion heat insulation layer 9 and the cushion buffer layer 10.

[0039] Preferably, the cushion waterproof layer 8 is arranged outside the cushion heat insulation layer 9, and the cushion buffer layer 10 is arranged inside the cushion heat insulation layer 9.

[0040] Preferably, the internal material of the cushion waterproof layer 8 is neoprene.

[0041] It should be noted that, under the action of the cushion waterproof layer 8, the external rainwater can be prevented from penetrating into the cushion, thereby avoiding the rainwater from contacting the printing structure layer 6, and the printing structure layer 6 is well protected.

[0042] Preferably, the internal material of the cushion heat insulation layer 9 is aerogel felt.

[0043] Preferably, the internal material of the cushion buffer layer 10 is latex.

[0044] Preferably, the upper surface of the bicycle cushion body 1 is provided with a cushion external groove 24, the lower surface of the bicycle cushion body 1 is provided with a cushion internal groove 5, the internal part of the cushion internal groove 5 is fixedly connected with a mounting positioning block 2, the internal part of the mounting positioning block 2 is provided with a mounting fixed screw hole 3, when the bicycle cushion is connected with the bicycle connecting rod, the mounting fixed screw hole 3 of the mounting positioning block 2 at the lower end position of the bicycle cushion is inserted into the outside of the bicycle connecting rod, the bicycle cushion body 1 is twisted, the mounting positioning block 2 is screwed to the position of the bicycle connecting rod, thereby realizing the quick mounting effect of the bicycle cushion and the bicycle.

[0045] The working principle and use process of the present application: when in use, the bicycle cushion body 1 is printed by a 3D printer, the auxiliary replacement support 13 is installed on the lower surface of the bicycle cushion body 1 by screwing the fixing screws 26 between the auxiliary connecting screw holes 4 on both sides of the lower end of the bicycle cushion body 1 and the positioning screw holes 12 on both sides of the cushion reinforcing plate 11, when the bicycle cushion is connected with the bicycle connecting rod, the installation fixing screw hole 3 of the installation positioning block 2 at the lower end position of the bicycle cushion is inserted into the outside of the bicycle connecting rod, the bicycle cushion body 1 is screwed to make the installation positioning block 2 screw to the position of the bicycle connecting rod, so as to realize the quick installation effect of the bicycle cushion and the bicycle, the auxiliary replacement screw rod 16 at the lower end position of the auxiliary replacement support 13 is rotated by forwardly screwing the auxiliary replacement knob 22, the auxiliary replacement screw ring 17 at the position of the auxiliary replacement screw rod 16 pulls the auxiliary replacement clamp block 19 to clamp the bicycle connecting rod inwardly, so as to prevent the bicycle cushion from rotating and falling off during riding, when disassembled subsequently, the auxiliary replacement knob 22 can be reversely screwed to separate the auxiliary replacement clamp block 19 from the bicycle connecting rod, at this time, only the bicycle cushion body 1 needs to be reversely screwed to separate the installation positioning block 2 at the lower end position of the bicycle cushion body 1 from the bicycle connecting rod, so that the cushion can be disassembled, which is convenient for subsequent replacement of the cushion, the cushion protection layer 7 is additionally arranged outside the printing structure layer 6, the cushion protection layer 7 is composed of the cushion waterproof layer 8, the cushion heat insulation layer 9 and the cushion buffer layer 10, under the action of the cushion waterproof layer 8, the external rainwater can be prevented from penetrating into the cushion, so that the rainwater is prevented from contacting the printing structure layer 6, and the printing structure layer 6 is well protected.

[0046] Embodiment one:

[0047] The utility model provides a 3D printing rapid prototyping bicycle seat cushion of convenient replacement, including bicycle seat cushion body 1, installation positioning block 2, seat cushion protective layer 7, seat cushion reinforcing plate 11 and auxiliary replacement support 13, the inside of bicycle seat cushion body 1 is composed of printing structure layer 6 and seat cushion protective layer 7, seat cushion protective layer 7 sets up at the outside of printing structure layer 6, the lower surface of bicycle seat cushion body 1 is provided with seat cushion reinforcing plate 11, both sides of bicycle seat cushion body 1 are provided with auxiliary connecting screw hole 4, both sides of seat cushion reinforcing plate 11 are provided with positioning screw hole 12, and the fixed screw 26 is screw -threadedly connected in the middle of auxiliary connecting screw hole 4 and positioning screw hole 12, the lower end of seat cushion reinforcing plate 11 is fixedly connected with auxiliary replacement support 13, the lower end of auxiliary replacement support 13 is fixedly connected with support positioning plate 18 on both sides, the inside of two support positioning plates 18 is rotatably connected with auxiliary replacement screw rod 16, and both sides of auxiliary replacement screw rod 16 are provided with auxiliary replacement screw ring 17, and two auxiliary replacement screw rings 17 are screw -threadedly connected with auxiliary replacement screw rod 16, and the outer end of auxiliary replacement screw rod 16 is drivingly connected with auxiliary replacement knob 22, and auxiliary replacement knob 22 is rotatably connected on the outside of support positioning plate 18, the lower end of two auxiliary replacement screw rings 17 is fixedly connected with movable connecting plate 25, and the lower end of two movable connecting plates 25 is fixedly connected with auxiliary replacement clamping block 19, by the forward screwing of auxiliary replacement knob 22, the rotation of auxiliary replacement screw rod 16 at the lower end position of auxiliary replacement support 13 makes the auxiliary replacement screw ring 17 at both sides positions of auxiliary replacement screw rod 16 pull the auxiliary replacement clamping block 19 and clamp the bicycle connecting rod to the inside, to prevent the rotation and falling of bicycle seat cushion in the process of riding.

[0048] In the utility model, preferably, the inside of the lower end of auxiliary replacement support 13 is provided with support bottom position sliding groove 14, both sides in the inside of support bottom position sliding groove 14 are slidably connected with sliding groove built -in sliding block 15, and the lower end of sliding groove built -in sliding block 15 is fixedly connected with auxiliary replacement screw ring 17, when subsequent dismounting, can reverse screwing auxiliary replacement knob 22, make auxiliary replacement clamping block 19 and bicycle connecting rod separate, at this time, only need to reverse screwing bicycle seat cushion body 1, make the installation positioning block 2 at the lower end position of bicycle seat cushion body 1 and bicycle connecting rod separate, can remove seat cushion, convenient for subsequent replacement seat cushion.

[0049] Embodiment two:

[0050] The utility model provides a 3D printing rapid prototyping bicycle seat cushion convenient to replace, including bicycle seat cushion body 1, installation positioning block 2, seat cushion protective layer 7, seat cushion reinforcing plate 11 and auxiliary replacement support 13, the inside of bicycle seat cushion body 1 is composed of printing structure layer 6 and seat cushion protective layer 7, seat cushion protective layer 7 sets up at the outside of printing structure layer 6, the lower surface of bicycle seat cushion body 1 is provided with seat cushion reinforcing plate 11, both sides of bicycle seat cushion body 1 are provided with auxiliary connecting screw hole 4, both sides of seat cushion reinforcing plate 11 are provided with positioning screw hole 12, and the fixed screw 26 is screw -threaded in the middle of auxiliary connecting screw hole 4 and positioning screw hole 12, the lower end of seat cushion reinforcing plate 11 is fixedly connected with auxiliary replacement support 13, the lower end of auxiliary replacement support 13 is fixedly connected with support positioning plate 18 on both sides, the inside of two support positioning plates 18 is rotatably connected with auxiliary replacement screw rod 16, and both sides of auxiliary replacement screw rod 16 are provided with auxiliary replacement screw ring 17, and two auxiliary replacement screw rings 17 are screw -threaded with auxiliary replacement screw rod 16, and the outer end of auxiliary replacement screw rod 16 is drivingly connected with auxiliary replacement knob 22, and auxiliary replacement knob 22 is rotatably connected on the outside of support positioning plate 18, the lower end of two auxiliary replacement screw rings 17 is fixedly connected with movable connecting plate 25, and the lower end of two movable connecting plates 25 is fixedly connected with auxiliary replacement clamp block 19, by forwardly screwing auxiliary replacement knob 22, make the auxiliary replacement screw rod 16 of auxiliary replacement support 13 lower end position rotate, make the auxiliary replacement screw ring 17 of auxiliary replacement screw rod 16 both sides position pull auxiliary replacement clamp block 19 and clamp inside bicycle connecting rod, to prevent the rotation of bicycle seat cushion from falling off during the process of riding.

[0051] In the application, preferably, the inside of the lower end of the auxiliary replacement support 13 is provided with a support bottom position sliding groove 14, both sides of the inside of the support bottom position sliding groove 14 are slidingly connected with a sliding groove built-in sliding block 15, the lower end of the sliding groove built-in sliding block 15 is fixedly connected with the auxiliary replacement screw ring 17, and when disassembling subsequently, the auxiliary replacement knob 22 can be twisted in reverse, the auxiliary replacement clamp block 19 is separated from the bicycle connecting rod, at this time, only the bicycle seat cushion body 1 needs to be twisted in reverse, the installation positioning block 2 at the lower end of the bicycle seat cushion body 1 is separated from the bicycle connecting rod, and the seat cushion can be disassembled, which is convenient for subsequent replacement of the seat cushion.

[0052] In the application, preferably, the inside of the seat cushion waterproof layer 8 is made of neoprene, which can prevent external rainwater from penetrating into the seat cushion, thereby avoiding contact between the rainwater and the printing structure layer 6, and achieving good protection effect on the printing structure layer 6.

[0053] In the application, preferably, the upper surface of the bicycle seat body 1 is provided with a seat outer groove 24, the lower surface of the bicycle seat body 1 is provided with a seat inner groove 5, the seat inner groove 5 is fixedly connected with a mounting positioning block 2, the mounting positioning block 2 is provided with a mounting fixed screw hole 3, when the bicycle seat is connected with the bicycle connecting rod, the mounting fixed screw hole 3 of the mounting positioning block 2 at the lower end position of the bicycle seat is inserted into the outer side of the bicycle connecting rod, the bicycle seat body 1 is screwed, the mounting positioning block 2 is screwed to the position of the bicycle connecting rod, thereby realizing the quick mounting effect of the bicycle seat and the bicycle.

[0054] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A replaceable 3D-printed rapid prototyping bicycle saddle, comprising a bicycle saddle body (1), a mounting positioning block (2), a saddle protective layer (7), a saddle reinforcement plate (11), and an auxiliary replacement bracket (13), characterized in that: The bicycle seat body (1) is composed of a printed structure layer (6) and a seat protective layer (7). The seat protective layer (7) is located on the outside of the printed structure layer (6). A seat reinforcement plate (11) is provided on the lower surface of the bicycle seat body (1). Auxiliary connecting screw holes (4) are provided on both sides of the bicycle seat body (1). Positioning screw holes (12) are provided on both sides of the seat reinforcement plate (11). A fixing screw (26) is threaded between the auxiliary connecting screw holes (4) and the positioning screw holes (12). An auxiliary replacement bracket (13) is fixedly connected to the lower end of the seat reinforcement plate (11). The lower ends of the auxiliary replacement bracket (13) are fixedly connected to both sides. A bracket positioning plate (18) is attached. An auxiliary replacement screw (16) is rotatably connected to the inner side of the two bracket positioning plates (18). An auxiliary replacement screw ring (17) is provided on both sides of the auxiliary replacement screw (16). The two auxiliary replacement screw rings (17) are threadedly connected to the auxiliary replacement screw (16). An auxiliary replacement knob (22) is drivenly connected to the outer end of the auxiliary replacement screw (16). The auxiliary replacement knob (22) is rotatably connected to the outer side of the bracket positioning plate (18). A movable connecting plate (25) is fixedly connected to the lower end of the two auxiliary replacement screw rings (17). An auxiliary replacement clamp (19) is fixedly connected to the lower end of the two movable connecting plates (25). The inner surface of the auxiliary replacement clamp (19) is provided with an arc-shaped connecting groove (20), and the inner surface of the arc-shaped connecting groove (20) is provided with a plurality of protruding contact points (21). The lower inner side of the auxiliary replacement bracket (13) is provided with a bracket bottom slide groove (14). The two sides of the bracket bottom slide groove (14) are slidably connected with slide groove built-in sliders (15). The lower end of the slide groove built-in sliders (15) is fixedly connected with an auxiliary replacement screw ring (17).

2. The easily replaceable 3D-printed rapid prototyping bicycle seat according to claim 1, characterized in that: The auxiliary replacement screw (16) has a screw center ring (23) in the middle. The auxiliary replacement screw (16) has a left thread on one side of its outer surface and a right thread on the other side of its outer surface. The screw center ring (23) is located at the junction of the left thread and the right thread.

3. The easily replaceable 3D-printed rapid prototyping bicycle seat according to claim 2, characterized in that: The seat cushion protective layer (7) is composed of a seat cushion waterproof layer (8), a seat cushion heat insulation layer (9) and a seat cushion cushioning layer (10).

4. The easily replaceable 3D-printed rapid prototyping bicycle seat according to claim 3, characterized in that: The waterproof layer (8) of the seat cushion is located on the outside of the heat insulation layer (9) of the seat cushion, and the cushion cushion buffer layer (10) is located on the inside of the heat insulation layer (9) of the seat cushion.

5. A replaceable 3D-printed rapid prototyping bicycle seat according to claim 4, characterized in that: The inner material of the waterproof layer (8) of the cushion is neoprene rubber.

6. A replaceable 3D-printed rapid prototyping bicycle seat according to claim 5, characterized in that: The inner material of the seat cushion insulation layer (9) is aerogel felt.

7. A replaceable 3D-printed rapid prototyping bicycle seat according to claim 6, characterized in that: The cushion cushion layer (10) is made of latex.

8. A replaceable 3D-printed rapid prototyping bicycle seat according to claim 7, characterized in that: The upper surface of the bicycle seat body (1) is provided with an external seat groove (24), and the lower surface of the bicycle seat body (1) is provided with an internal seat groove (5). An installation positioning block (2) is fixedly connected inside the internal seat groove (5), and an installation fixing screw hole (3) is provided inside the installation positioning block (2).

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