Bicycle saddle liner

Abstract

The invention discloses a bicycle saddle cushion, and relates to a bicycle saddle, in particular to manufacturing of the bicycle saddle cushion. Comprising a surface layer and a middle layer, and the middle layer is a foaming thermoplastic TPU polyurethane material layer; the surface layer is a casting type CPU polyurethane material layer; the surface layer covers the surface of the middle layer, the surface layer is poured on the outer surface of the middle layer, so that the surface layer uniformly covers the middle layer according to the shape of the middle layer, and the middle layer and the surface layer are bonded into a whole. According to the bicycle saddle cushion, the formability is improved, the middle layer is protected by the surface layer, the weather resistance is improved, the use comfort feeling is also improved, and the service life is prolonged.

Description

Technical Field

[0001] The invention discloses a bicycle seat cushion and relates to a bicycle seat, in particular to the manufacture of a bicycle seat cushion. Background Art

[0002] At present, the general bicycle seat uses a hard seat cushion, which has a large friction force and is easy to cause discomfort during riding. Ordinary padded seats may cause discomfort in the perineum and sciatic bone, which is easy to cause pain, numbness, and inflammation. Even in short-distance riding, the nose of the seat will rub the perineum and soft tissues to cause pain, and it does not have a shock-absorbing effect. For this reason, Chinese patent literature discloses a patent for a popcorn foam bicycle saddle, and its authorization announcement number is CN208306817U. The patent technical solution discloses that the bicycle saddle has a surface layer and an intermediate layer, the intermediate layer is made of thermoplastic polyurethane elastomer rubber, that is, E-TPU material, and the surface layer is a PU leather composite layer. The saddle thus formed has good elasticity and wear resistance, outstanding load-bearing capacity, impact resistance, shock absorption performance and cold resistance, and has the advantages of shape retention, wear resistance and no deformation after washing, so that people can easily and comfortably enjoy the fun of riding a bicycle. However, in actual use, due to the poor formability of E-TPU materials, poor hydrolysis resistance, poor weather resistance, and easy to get dirty, and although the surface layer covers the middle layer, the surface layer and the middle layer are two bodies, generally using sewing technology, the two are in a separated state, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, there is an isolation layer 3 between the surface layer 1 and the middle layer 2. The isolation layer 3 is actually air isolation. The surface layer 1 and the middle layer 2 are not fixedly attached together. In addition, there is an elliptical through hole 3 in the middle of the middle layer 2, which increases the difficulty of making the surface layer and the covering middle layer, not only making the production efficiency extremely low, the cost high, and the quality poor, but also making the surface layer subject to external friction and relative displacement and wrinkling between the surface layer and the middle layer during long-term use, making the surface layer easy to be damaged, thereby affecting the performance of the middle layer material, and thus also bringing a bad use experience to consumers.

[0003] Of course, the surface layer and the middle layer can also be bonded together using adhesive bonding technology, but the bonding strength, appearance and product quality of the adhesive bonding are affected to a certain extent. Moreover, the adhesive bonding process requires a lot of manpower, which also greatly increases the production cost of the product. Summary of the invention

[0004] The purpose of the present invention is to provide a bicycle seat cushion, which improves the surface material and the molding technology between the surface and the middle layer to achieve the bonding of the middle layer and the surface layer, improve the formability, and the surface layer protects the middle layer, improves weather resistance, improves the comfort of use, and extends the service life.

[0005] The technical solution of the utility model is: a bicycle seat cushion, comprising a surface layer and a middle layer; the characteristic is that the middle layer is a load-bearing layer, and the middle layer is a soft foaming material layer; the surface layer is a CPU polyurethane material layer; the surface layer covers the middle layer, and the inner surface of the surface layer is bonded to the middle layer as a whole.

[0006] In the above-mentioned bicycle seat cushion, the middle layer is a foamed thermoplastic TPU polyurethane material layer.

[0007] In the above-mentioned bicycle seat cushion, a fixing plate is arranged below the middle layer, and the fixing plate can be fixed to the bottom plate of the seat.

[0008] In the above-mentioned bicycle seat cushion, the surface layer only covers the portion of the middle layer exposed to the outside, and the fixing plate is in direct contact and fixed to the middle layer.

[0009] The above-mentioned bicycle seat cushion places the middle layer in a closed mold, preheats it to 60-80°C, evacuates the inner cavity of the mold to -0.1Mpa, pours a mixture of debubbled CPU polyurethane prepolymer raw material and curing agent into the mold cavity, and after curing, forms a seat cushion with the middle layer and the surface layer bonded together.

[0010] By adopting the above technical solution, a surface layer is poured on the outer surface of the middle layer so that the surface layer covers the middle layer and the middle layer and the surface layer are bonded together. The surface layer protects the middle layer, improves weather resistance, improves comfort in use, and extends service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view of a bicycle seat cushion.

[0012] Figure 2 yes Figure 1 Left view.

[0013] Figure 3 yes Figure 1 The AA cross-sectional view shown is a schematic diagram of the prior art structure.

[0014] Figure 4 yes Figure 3 The enlarged view of the part is shown.

[0015] Figure 5 The present invention is a bicycle seat cushion embodiment 1 AA cross-sectional view.

[0016] Figure 6 yes Figure 5 The enlarged view of the part is shown.

[0017] Figure 7 The present invention is a sectional view of the second embodiment of a bicycle seat cushion taken along line AA.

[0018] Figure 8 yes Figure 7 The enlarged view of the part is shown. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with embodiments and drawings:

[0020] See Figure 1 , Figure 2 , Figure 5 , Figure 6 The present invention shows a bicycle seat cushion embodiment 1. It includes a surface layer 1 and an intermediate layer 2, wherein the intermediate layer 2 is a foamed thermoplastic TPU polyurethane material layer, that is, the thermoplastic polyurethane elastomer, namely TPU particles, is subjected to pressurized heating treatment to form elliptical non-crosslinked foamed particles containing micro-enclosed bubbles, namely ETPU. Of course, the intermediate layer 2 can also be made of other soft foaming materials. A fixing plate (not shown) can be fixed under the intermediate layer, and the fixing plate can be fixed to the bottom plate of the seat, and then can be installed on the bicycle to make a bicycle saddle. The surface layer 1 described in this embodiment is a CPU polyurethane material layer, and its production method is to place the intermediate layer 2 in a closed mold, preheat to 60-80°C, evacuate the mold cavity to -0.1Mpa, pour the defoamed CPU polyurethane prepolymer raw material and the mixture of curing agent into the mold cavity, and after curing, the surface layer 1 is formed to cover the intermediate layer 2, and due to the characteristics of the polyurethane prepolymer raw material and the processing technology, the surface layer 1 of the present invention is bonded to the intermediate layer 2 as a whole. In this way, the surface layer protects the middle layer, improves weather resistance, increases comfort in use, and extends service life.

[0021] See Figure 7 , Figure 8 The second embodiment of a bicycle seat cushion of the present invention is shown. Different from the first embodiment, the surface layer 1 only covers the portion of the middle layer 2, that is, the portion of the middle layer 2 exposed to the outside is covered with the surface layer 1, which is exposed to the outside and in contact with foreign objects, and is subjected to the weight of the human body's buttocks, and is more likely to be soiled or damaged, while the portion directly in contact with the fixing plate is not exposed to the outside and does not need to be covered with the surface layer 1.

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A bicycle seat cushion, comprising a surface layer and an intermediate layer; characterized in that The middle layer is a load-bearing layer, which is a soft foaming material layer; the surface layer is a cast CPU polyurethane material layer; the surface layer covers the middle layer, and the inner surface of the surface layer is bonded to the middle layer as a whole.

2. A bicycle seat cushion according to claim 1, characterized in that The middle layer is a foamed thermoplastic TPU polyurethane material layer.

3. A bicycle seat cushion according to claim 2, characterized in that A fixing plate is arranged under the middle layer, and the fixing plate can be fixed to the bottom plate of the vehicle seat.

4. A bicycle seat cushion according to claim 3, characterized in that The surface layer only covers the portion of the middle layer exposed to the outside, and the fixing plate is in direct contact and fixed with the middle layer.

5. A bicycle seat cushion according to claims 2, 3 and 4, characterized in that The middle layer is placed in a closed mold, preheated to 60-80°C, the inner cavity of the mold is evacuated to -0.1Mpa, and a mixture of debubbled CPU polyurethane prepolymer raw material and curing agent is poured into the mold cavity. After curing, a seat cushion with the middle layer and the surface layer bonded together is formed.

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