TWI614171B - Method for manufacturing the surface layer of the pedal driving device - Google Patents

Description

Method for manufacturing the surface layer of the pedal driving device

The present invention relates to bicycles, pedal exercisers or other seat cushions similar to pedal-operated appliances, and more particularly to a method of making the cushion surface.

Foot-operated devices, such as bicycles, pedal exercisers, etc., must be provided with a pad to support the user's body. The seat cushion generally includes a frame, a skin layer and an elastic layer disposed between the two. The frame is used to support the weight of the user and to secure the seat to the pedal drive with suitable fastening means. The elastic layer is used to provide proper elasticity and shock absorption, and the surface layer is used to contact the seat cushion with the body part of the user. At present, the biggest disadvantage of these cushions is that the surface of the surface layer must have a certain coefficient of friction, which should not be too smooth or too rough, so that it can be properly fitted to the body part of the user, but when the user step on the foot When the device is driven, the inner portion of the thigh repeatedly contacts the periphery of the surface of the seat cushion, causing periodic friction and thus causing discomfort and pain in the parts.

In order to solve this drawback, U.S. Patent No. 7,367,619 provides an improvement in the provision of a plurality of outwardly extending and open-ended projections on the periphery of the seat shell frame for the rigidity of the portions. Less than the other parts of the frame. That is to say, the patent solves the problem of repeated friction between the inner side of the user's thigh and the surface of the seat cushion by making the periphery of the seat cushion frame have a softer portion. The facts show that these improvements do make the edge of the seat cushion softer, but that's it, because the periodic friction problem caused by the reverse contact between the surface of the seat cushion and the user is still not effectively solved. Moreover, such improvements will weaken the strength of the seat frame.

The invention provides a method for manufacturing a surface layer of a pedal driving device seat cushion, and the seat cushion surface layer produced by the method can be used to solve the defects of the foregoing prior art. The method for manufacturing the cushion surface layer comprises the following steps: taking a plastic leather material; cutting the plastic leather material to form a corresponding foot a body of the shape of the driver's seat cushion; at least one first specific area is selected on the surface of the body, usually an area that is repeatedly rubbed against the body part of the user, for example, an inner part corresponding to the thigh of the user; the friction coefficient is selected to be smaller than the The plastic material on the surface of the body is directly coated on the specific area. The surface layer of the pedal driving device seat completed by the method has at least a sliding area, and the friction coefficient of the sliding area is smaller than other parts of the surface of the surface body.

Another feature of the method for making the surface of the pedal driving device seat cushion of the present invention is that the surface layer body is cut to have a surface, a narrow front portion and a wide rear portion, the narrow front portion having a central portion and two side edges, each of which is selected The side is the first specific area, and then the plastic material having a coefficient of friction smaller than the surface of the surface body is directly coated on each of the first specific areas. Such a skin layer is generally used for a bicycle seat cushion, and when the skin layer is applied to the seat cushion, each of the side faces corresponds to the inner side of each of the thighs of the user.

A further feature of the method for making the surface layer of the pedal driving device seat cushion of the present invention is that the leather material is a plastic leather material (for example, PU leather material).

In the surface layer manufacturing method of the pedal driving device seat cushion of the present invention, the plastic material having the friction coefficient smaller than the surface layer leather is directly applied to the specific region by screen printing, wherein the so-called direct coating means that no other is required. Materials such as adhesives are used as an intermediary. Of course, the screen printing method mentioned here is only one of the implementation methods, and other methods can be adopted as long as it can directly attach to the surface of the body.

A further feature of the method for manufacturing the surface layer of the pedal driving device of the present invention is that at least one second specific region is selected on the surface of the body, and then the raw material having a coefficient of friction greater than other portions of the surface is directly coated on the second specific region. The surface layer of the pedal driving device seat completed by the method will have a slip-sliding zone, and the friction coefficient of the anti-slip zone is greater than other parts of the surface of the surface body.

Further, the method for manufacturing the surface layer of the pedal driving device of the present invention is characterized in that the coefficient of friction of the material having a coefficient of friction smaller than the surface layer of the skin material is about 0.5 or less, and the coefficient of dynamic friction is about 0.3 or less. This value is based on ASTM D. As measured by the -1894 test method, these coefficients of friction have a significant effect in reducing friction.

10‧‧‧ Bicycle seat surface body

12‧‧‧Straight front

14‧‧ ‧ wide rear

16‧‧‧ skirt

18‧‧‧Central District

20,22‧‧‧ side

24,26‧‧‧Sliding area

30‧‧‧ Bicycle seat cushion surface

100‧‧‧ Bicycle Seat

40‧‧‧Shell

50‧‧‧elastic shock absorbing layer

42‧‧‧ inner edge

60‧‧‧ Bicycle seat cushion surface

62‧‧‧Ontology

64‧‧‧Straight front

66‧‧‧ wide rear

68‧‧‧ skirt

70,72‧‧‧Slip zone

74,76‧‧‧Slip zone

The method of the present invention will be further described in the following embodiments with reference to the drawings, wherein: the first drawing is a perspective view of a surface layer of a seat cushion which is usually provided for bicycles according to a preferred embodiment of the manufacturing method of the present invention. The second figure shows the first specific part selected in the surface layer shown in the first figure, and the three-dimensional view of the surface layer after the friction coefficient is smaller than the plastic material of the surface layer leather is applied to each specific part; The figure is a perspective view of the surface layer shown in the second figure when it is assembled to the bicycle seat cushion; the fourth figure is a sectional view along the direction of the third figure 4-4; the fifth figure is the surface layer shown in the first figure, and the second specific part is additionally selected. And a perspective view of the surface layer after the friction coefficient is greater than the plastic material of the surface layer leather; and the sixth figure is a perspective view when the surface layer shown in the fifth figure is assembled to the bicycle seat cushion.

Referring first to the first to third figures, in accordance with a preferred embodiment of the method of the present invention, a PU leather material is first taken and then the leather material is cut into a bicycle seat as shown in FIG. Pad surface body. The body 10 generally has a surface, a narrow front portion 12, a wide rear portion 14, and a skirt 16. The elongated front portion 12 has a central region 18 and two side edges 20, 22.

Then, a plastic material having a friction coefficient smaller than that of the surface of the body, for example, a raw material in which a mixture of polycarbon and bismuth is mixed in an appropriate ratio, is directly applied to the elongated front portion 12 by screen printing. On the side edges 20, 22, two sliding zones 24, 26 are formed, as shown in the second figure, wherein the figure shown in Figure 30 is the finished bicycle seat cushion surface. It must be mentioned here that the method of preparation herein is only one embodiment of the present invention. Further, in the present embodiment, according to the ASTM D-1894 test method, each of the smoothing regions 24, 26 has a static friction coefficient of about 0.5 and a dynamic friction coefficient of about 0.3. Further, each of the sliding regions 24, 26 has a thickness of at least 0.03 mm.

As shown in the third and fourth figures, wherein the figure 100 is a bicycle seat cushion using the surface layer 30. In more detail, the seat cushion 100 includes the surface layer 30, a rigid frame 40 and an elastic shock absorbing layer 50. The elastic shock absorbing layer 50 is disposed between the frame 40 and the surface layer 30. The skirt 16 of the surface body 10 is used to adhere to the inner peripheral surface 42 of the frame 40 when the surface layer 30 is disposed on the bicycle seat frame 40. Each of the sliding zones 24, 26 corresponds to the inner side of the thigh of the user after the seat cushion 100 is formed, and since the friction coefficient of the portion is better than other parts, the parts and the cushion can be effectively solved. Surface friction problem.

Referring to FIG. 5 and FIG. 6 again, the figure 60 shows another bicycle seat surface layer implemented according to the manufacturing method of the present invention. The surface layer 60 is formed in the same manner as the surface layer 30, and has the same The PU body is made of a body 62 having a long front portion 64, a wide portion 66 and a skirt 68. The elongated front portion 64 likewise has two smoothing zones 70,72. The difference between the two is that a material having a coefficient of friction greater than that of the surface of the body 62 is additionally taken, and then the material is directly applied to both sides of the wide rear portion 66 of the surface of the body 62 by screen printing to form a two-slip zone 74. , 76. Since the friction coefficient of each of the anti-slip zones 74, 76 is large, the sliding of the user's buttocks on the surface of the seat cushion during riding can be reduced, thereby solving the problem of repeated friction.

10‧‧‧ Bicycle seat surface body

24,26‧‧‧Sliding area

30‧‧‧ Bicycle seat cushion surface

Claims (5)

The invention relates to a method for manufacturing a surface layer of a pedal driving device, comprising the steps of: taking a plastic leather material; cutting the plastic leather material to form a surface having a narrow front portion and a wide rear body, the narrow front portion having a central zone and two sides; each of the sides of the elongated front portion is selected as a first specific area; and a plastic material having a friction coefficient smaller than the surface of the body is directly applied to each of the first specific regions to form Second smoothing area. The method of claim 1, wherein the plastic leather material is a PU leather material, and the plastic material having a friction coefficient smaller than the surface of the body is directly applied to each of the first specific regions by screen printing. The method of claim 2, wherein the plastic material having a coefficient of friction smaller than the surface of the body is a material mixed with polyester and bismuth. The method of claim 3, wherein each of the sliding regions has a thickness of at least 0.03 mm. The method according to claim 1, wherein the dynamic friction coefficient of each of the sliding zones is about 0.3 or less according to the ASTM D-1894 test method.