WO2018053973A1 - 一种用于床垫、坐垫、靠垫的垫芯 - Google Patents

一种用于床垫、坐垫、靠垫的垫芯 Download PDF

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Publication number
WO2018053973A1
WO2018053973A1 PCT/CN2017/000545 CN2017000545W WO2018053973A1 WO 2018053973 A1 WO2018053973 A1 WO 2018053973A1 CN 2017000545 W CN2017000545 W CN 2017000545W WO 2018053973 A1 WO2018053973 A1 WO 2018053973A1
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spring
core
mold
cushion
silicone
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PCT/CN2017/000545
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English (en)
French (fr)
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杜家柯
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杜家柯
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Publication of WO2018053973A1 publication Critical patent/WO2018053973A1/zh

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/04—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with spring inlays
    • A47C27/06—Spring inlays
    • A47C27/07—Attaching, or interconnecting of, springs in spring inlays
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/12—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton

Definitions

  • the invention relates to the technical field of mattresses, cushions and cushions, in particular to a cushion core for a mattress, a seat cushion and a cushion, and a preparation method of the cushion core.
  • the mattresses, car seat cushions, chair cushions, sofa cushions, cushions (pillows) used in our lives are often made of foamed materials (sponges) or springs as elastic cushion cores.
  • Foam material core defects poor gas permeability and long-lasting elasticity. Because of its high elasticity and breathability, the spring pad core has been loved by everyone. However, the spring pad core and the spring connection technology still need to be improved and improved.
  • the existing connection technology includes wire spring connection, metal snap connection, bag adhesive connection, etc. . Wire spring and metal snap connection to the core of the compression spring.
  • Disadvantages 1 Metal contact points are more likely to make a sound when used.
  • Disadvantage 2 Poor flexibility.
  • the pad body is easy to interlock during use.
  • Disadvantages of the pad core produced by the adhesive connection of the compression spring the spring is easy to shift and the flatness is poor.
  • silica gel has the advantages of high tensile strength, good resilience, flexibility, non-toxicity, odorlessness, high temperature resistance, low temperature resistance, easy operation, etc.
  • the core produced by the compression joint of silica gel has good flatness, breathability, high elasticity and no Poisonous, odorless, no sound, high temperature resistance, low temperature resistance, flexibility and comfort.
  • the seat cushions with ventilation and heating functions are more and more popular, because of the high and low temperature resistance of silica gel and the high gas permeability of silicone-bonded compression spring cushion core.
  • the core made of silicone-bonded compression spring can be used as the core of various ventilation and heating cushions, which can improve the comfort of the ventilation and heating cushion.
  • One of the objects of the present invention is to provide a flatness, breathability, high elasticity, non-toxicity, odorlessness, no sound, high temperature resistance, low temperature resistance, flexibility and the like, and is used for mattresses and cushions.
  • the cushion core of the cushion is used for mattresses and cushions.
  • Another object of the present invention is to provide a method for preparing a core for a mattress, a cushion, and a cushion.
  • the core of the invention is made by using a silicone-connected compression spring.
  • the core is a whole consisting of upper, middle and lower parts.
  • the upper layer is the connecting layer of the silicone and the upper end support ring.
  • the middle part is the effective ring part of the spring, and the lower layer is the silicone and the spring.
  • the connecting layer of the lower end support ring is made by using a silicone-connected compression spring.
  • the upper and lower layers of the core are designed with a plurality of venting holes to increase the core permeability.
  • the venting holes can be designed in various forms depending on the inner diameter of the spring support ring and the order of the springs.
  • the cotton fiber and the spring support ring are provided with a cotton fiber to increase the tensile strength of the silica gel, and the cotton fiber is a cotton gauze woven according to the venting order.
  • the thickness of the silicone and spring support ring tie layers is 3 to 5 times the diameter of the compression spring wire used.
  • the silica gel is a two-component addition type room temperature vulcanized silicone rubber, and the liquid silicone gel is vulcanized in the mold to connect the compression spring.
  • the silica gel has high tensile strength, good resilience, flexibility, non-toxicity, odorlessness, high temperature resistance, low temperature resistance and easy operation.
  • the spring is a compression spring made of spring steel wire, and according to the core requirement, a cylindrical compression spring, a concave compression spring, a convex compression spring, a pagoda compression spring, a joint compression spring, and a bag are available. compressed spring.
  • the softness of the core can be changed by changing the shape of the spring, the diameter of the spring wire or the number of springs, and the thickness of the core can be changed by changing the height of the spring.
  • the method for preparing a mattress core for a mattress, a seat cushion and a cushion is to use a liquid silica gel to vulcanize and connect a compression spring in a mold, which is completed by the following specific steps.
  • Mold making According to the length and width of the core, the mold is made according to the number of springs and the spring row used by the core. The order and the inner diameter of the support ring at both ends of the spring design a venting hole in the mold. The venting hole should be smaller than the inner diameter of the support ring at both ends of the spring to facilitate the insertion of the spring.
  • cotton fiber is a cotton gauze woven according to the order of vent holes.
  • Silica gel is a liquid two-component addition type room temperature vulcanized silicone rubber. Mix the liquid silica gel into two groups and pour it into the mold. The thickness of the silica gel is 3 to 5 times the diameter of the compression spring wire used. .
  • silica gel vulcanization After the silica gel is leveled in the mold, it can be vulcanized by silica gel. It can be vulcanized at room temperature or vulcanized at room temperature. After mixing the two groups of silica gel at room temperature of 28 degrees Celsius, there is 30 minutes of operation time, 2 to 4 hours completely. Curing, heating to 80 to 120 degrees Celsius, fully cured in 10 minutes.
  • the invention has the beneficial effects that a cushion core for a mattress, a seat cushion and a cushion is easy to operate by connecting a compression spring with a silica gel, and can be mass-produced.
  • the core produced by the compression joint of the silica gel has the advantages of good flatness, breathability, high elasticity, non-toxicity, odorlessness, no sound, high temperature resistance, low temperature resistance, flexibility and the like.
  • the core made of silicone compression spring can be used as the core of various ventilation and heating cushions to improve the comfort of the ventilation and heating cushion.
  • FIG. 1 is a schematic view showing the three-dimensional structure of a core of the present invention.
  • Figure 2 is a plan view of the core of the present invention.
  • Figure 3 is a schematic perspective view of the three-dimensional structure of the core of the present invention and the connecting layer of the upper end support of the silicone and the spring.
  • Figure 4 is a schematic view showing the arrangement of a venting hole of the present invention.
  • Figure 5 is a flow chart of a method for preparing a core of the present invention
  • the markings in the drawing are: 1. the connecting layer of the silicone and the upper end support ring, 2. the effective ring part of the spring, 3. the connecting layer of the silicone and the lower end support ring, 4 venting holes, 5. venting holes, 6 springs Support ring, 7. cotton fiber, 8. venting hole, 9. venting hole.
  • a mattress core for mattresses, cushions, and cushions is made of a silicone-connected compression spring.
  • the core is a whole including 1, 2, 3, and 3 parts; 1. Silicone and spring upper end support The connecting layer of the ring, the effective ring portion of the spring, the connecting layer of the silicone and the lower end support ring.
  • venting holes 4 As shown in Fig. 1 and Fig. 2, the upper and lower layers of the core are provided with venting holes 4, venting holes 5, and the number of venting holes 4 is equal to that of the spring.
  • One spring corresponds to one venting hole, and the venting hole 4 is circular, and its diameter is smaller than The inner diameter of the compression spring support ring is compressed, and the vent hole 5 is intermediate between the four springs.
  • a cotton fiber 7 is added to the connecting layer of the silicone rubber and the spring support ring, and the cotton fiber 7 is a cotton mesh woven according to the order of the vent hole 4 and the vent hole 5.
  • the cotton fiber 7 is outside the spring support ring 6.
  • vent holes 4 and 5 described above are in the shape of the vent hole of the small-diameter spring of the present invention.
  • the large-diameter spring can divide the vent holes 4 and 5 into a plurality of small vent holes, which can increase the flatness of the core.
  • the venting holes can be designed in various shapes such as hexagons, diamonds, triangles, and the like.
  • the thickness of the above-mentioned silicone and spring support ring connecting layers 1 and 3 is 3 to 5 times the diameter of the above-mentioned compression spring wire.
  • the thickness of the connecting layer of the silicone rubber and the spring support ring varies depending on the use of the core and the thickness of the spring wire.
  • the above silica gel is a two-component addition type room temperature vulcanized silicone rubber.
  • the liquid silicone gel vulcanizes the connected compression spring in the mold, and the silica gel has high tensile strength, good resilience, flexibility, non-toxicity, odorlessness, high temperature resistance, low temperature resistance, and easy operation.
  • the hardness of the silica gel can vary depending on the hardness of the spring.
  • the spring is a compression spring made of a spring wire.
  • cylindrical compression springs medium concave compression springs, medium convex compression springs, pagoda compression springs, conjoined compression springs, and pocket compression springs are available.
  • the softness of the core can be changed by changing the shape of the spring, the diameter of the spring wire or the number of springs, and the thickness of the core can be changed by changing the height of the spring.
  • the method for preparing the core of the silica gel silicone connecting spring shown in FIG. 5 is completed by the following specific steps.
  • Mold making The mold is made according to the length and width of the elastic core, and the vent hole is designed in the mold.
  • Cotton fiber is a cotton gauze woven according to the venting order.
  • silica gel is a liquid two-component addition room temperature vulcanized silicone rubber.
  • the liquid silicone is mixed into two groups and poured into the mold.
  • the thickness of the silica gel is 3 to 5 times the diameter of the compression spring wire used.
  • One end of the compression spring is placed in the mold: the liquid silicone in the mold is wrapped around the support ring of one end of the spring.
  • silica gel vulcanization after silica gel leveling, it can be vulcanized by silica gel, which can be vulcanized at room temperature or vulcanized.
  • the spring used in the present invention is a traditional material for making mattresses and cushions, and the production technology has matured.
  • the silicone rubber used has been widely used in our lives.
  • the silicone rubber used is easy to handle, and the core can be produced by using a silicone-bonded compression spring to make the core.
  • the core produced by the silicone rubber connecting compression spring has the advantages of good flatness, breathability, high elasticity, non-toxic, odorless, no sound, high temperature resistance, low temperature resistance, flexibility and the like.
  • the core made of silicone rubber to the compression spring can be used as the core of various ventilation and heating cushions, which can improve the ventilation and heating Comfort of the cushion.

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  • Mattresses And Other Support Structures For Chairs And Beds (AREA)

Abstract

一种用于床垫、坐垫、靠垫的垫芯以及该垫芯的制备方法，所述垫芯是硅胶连接压缩弹簧制成，垫芯是一个整体包括上层，中部，下层三部分，上层是硅胶和弹簧上端支撑圈的连接层（1），中部是弹簧的有效圈部分（2），下层是硅胶和弹簧下端支撑圈的连接层（3），垫芯上层和下层设计有若干个透气孔（4,5）。具体制作方法步骤如下：.模具制作，.模具中放入棉纤维（7），.模具中倒入液体硅胶，.弹簧的一端放入模具中，.硅胶硫化，.脱模，.模具中放入棉纤维，.模具中倒入液体硅胶，.弹簧的另一端放入模具中，.硅胶硫化，.脱模。

Description

一种用于床垫、坐垫、靠垫的垫芯 技术领域
本发明涉及床垫、坐垫、靠垫技术领域，尤其涉及一种用于床垫、坐垫、靠垫的垫芯以及该垫芯制备方法。
背景技术
我们生活中使用的床垫、车坐垫、椅坐垫、沙发坐垫、靠垫(靠枕)等多以发泡材料(海绵)或弹簧做为弹性垫芯。发泡材料垫芯缺点：透气性差、弹性不持久。弹簧垫芯因为具有高弹力和透气性一直受大家喜爱，然而弹簧垫芯，弹簧的连接技术仍需要改进和提高，现有连接技术有钢丝穿簧连接，金属卡扣连接，布袋胶粘连接等。钢丝穿簧和金属卡扣连接压缩弹簧生产的垫芯缺点1：金属接触点多在使用时容易发出响声，缺点2：柔韧性差在使用过程中垫体容易连动。布袋胶粘连接压缩弹簧生产的垫芯缺点：弹簧容易移位，平整度差。
由于硅胶具有拉伸强度高、回弹力好、柔韧、无毒、无味、耐高温、耐低温、容易操作等优点，利用硅胶连接压缩弹簧生产的垫芯具有平整度好、透气、高弹力、无毒、无味、无响声、耐高温、耐低温、柔韧舒适等优点。
另外随着生活水品的提高人们对车坐垫的要求也在提高，具有通风冷暖功能车坐垫越来越受到大家喜爱，由于硅胶具有耐高低温的特性以及硅胶连接压缩弹簧垫芯的高透气性，利用硅胶连接压缩弹簧制作的垫芯可以用做各种通风冷暖车坐垫的垫芯，可以提高通风冷暖车坐垫的舒适度。
发明内容
本发明的目的之一是克服现有技术不足提供一种具有平整度好、透气、高弹力、无毒、无味、无响声、耐高温、耐低温、柔韧舒适等优点，用于床垫、坐垫、靠垫的垫芯。
本发明的另一目的是提供一种用于床垫、坐垫、靠垫的垫芯制备方法。
本发明的上述目的和技术是通过以下技术方案得以实现的。
本发明垫芯是利用硅胶连接压缩弹簧制成，垫芯是一个整体包括上中下三部分，上层是硅胶和弹簧上端支撑圈的连接层，中部是弹簧的有效圈部分，下层是硅胶和弹簧下端支撑圈的连接层。
作为优选；所述垫芯的上层和下层设计若干个透气孔增加垫芯透气性。透气孔根据弹簧支撑圈内径的大小和弹簧的排序可以设计成各种形态。
作为优选；所述硅胶和弹簧支撑圈的连接层中加有棉纤维增加硅胶拉伸强度，棉纤维是根据透气孔排序编织的棉纱网。
作为优选；所述硅胶和弹簧支撑圈连接层的厚度是所用压缩弹簧钢丝直径的3到5倍。
作为优选；所述硅胶是双组分加成型室温硫化硅橡胶，液体硅胶在模具中硫化连接压缩弹簧。所述硅胶拉伸强度高、回弹力好、柔韧、无毒、无味、耐高温、耐低温、容易操作。
作为优选；所述弹簧是弹簧钢丝制作的压缩弹簧，根据垫芯需要，可以选用圆柱形压缩弹簧、中凹形压缩弹簧、中凸形压缩弹簧、宝塔形压缩弹簧、连体压缩弹簧、袋装压缩弹簧。可以通过改变弹簧形状、弹簧钢丝的直径或弹簧的数量来改变垫芯的软硬度，通过改变弹簧的高度来改变垫芯的薄厚度。
本发明一种用于床垫、坐垫、靠垫的垫芯制备方法是：利用液体硅胶在模具中硫化连接压缩弹簧，是通过以下具体步骤完成的。
(1).模具制作：根据垫芯长宽尺寸制作出模具，根据垫芯所用弹簧的数量和弹簧排 序以及弹簧两端支撑圈的内径在模具中设计出透气孔。透气孔应小于弹簧两端支撑圈的内经，方便弹簧的放入。
(2).模具中放入棉纤维：棉纤维是跟据透气孔排序编织的棉纱网。
(3).模具中倒入液体硅胶：硅胶是液体双组分加成型室温硫化硅橡胶，把液体硅胶双组混合后倒入模具中，硅胶的厚度是所用压缩弹簧钢丝直径的3到5倍。
(4).弹簧的一端放入模具中：让模具中的液体硅胶包裹住弹簧的一端支撑圈。
(5).硅胶硫化：硅胶在模具中流平后即可以硅胶硫化，可以室温硫化也可以加温硫化，所述硅胶双组混合后室温28摄氏度，有30分钟的操作时间，2至4小时完全固化，加温到80至120摄氏度，10分钟完全固化。
(6).脱模：硅胶完全固化后把硅胶和弹簧从模具中取出，弹簧的一端即被硅胶连接在一起，形成硅胶和弹簧一端支撑圈的连接层。
(7).模具中放入棉纤维。
(8).模具中倒入液体硅胶。
(9).弹簧的另一端放入模具中。
(10).硅胶硫化。
(11).脱模；硅胶完全固化后把硅胶和弹簧从模具中取出，弹簧的另一端被硅胶连接在一起，形成硅胶和弹簧另一端支撑圈的连接层。
通过以上步骤，一种用于床垫、坐垫、靠垫的垫芯制作完成。
本发明的有益效果是；一种用于床垫、坐垫、靠垫的垫芯，利用硅胶连接压缩弹簧容易操作，可以规模化生产。利用硅胶连接压缩弹簧生产的垫芯具有平整度好、透气、高弹力、无毒、无味、无响声、耐高温、耐低温、柔韧舒适等优点。利用硅胶连接压缩弹簧制作的垫芯可以用做各种通风冷暖车坐垫的垫芯，可以提高通风冷暖车坐垫的舒适度。
附图说明
图1是本发明垫芯立体结构示意图。
图2是本发明垫芯俯视图。
图3是本发明垫芯立体结构以及硅胶和弹簧上端支撑圈连接层的透视示意图。
图4是本发明一种透气孔的排列示意图
图5是本发明垫芯制备方法流程图
附图中的标记为；1.硅胶和弹簧上端支撑圈的连接层，2.弹簧的有效圈部分，3.硅胶和弹簧下端支撑圈的连接层，4透气孔，5.透气孔，6弹簧支撑圈，7.棉纤维，8.透气孔，9.透气孔。
具体实施方式
以下结合附图对本发明做详细描述。
如图1所示：一种用于床垫、坐垫、靠垫的垫芯是有硅胶连接压缩弹簧制成，垫芯是一个整体包括1、2、3、三部分；1.硅胶和弹簧上端支撑圈的连接层，2.弹簧的有效圈部分，3.硅胶和弹簧下端支撑圈的连接层。
如图1图2所示：在垫芯上层和下层设计有透气孔4，透气孔5，透气孔4的数量和弹簧相等，一个弹簧对应一个透气孔，透气孔4是圆形，其直径小于压缩弹簧支撑圈的内径，透气孔5在四个弹簧中间。
如图3所示：硅胶和弹簧支撑圈连接层中加有棉纤维7，棉纤维7是根据透气孔4和透气孔5的排序编织的棉纱网。棉纤维7在弹簧支撑圈6的外部。
上述透气孔4和5是本发明小口径弹簧透气孔的形状。如图4所示：大口径弹簧可以把透气孔4和5分成多个小透气孔，可以增加垫芯的平整度。根据弹簧支撑圈的形状和排序，透气孔可以设计成各种形状如：六边形、菱形、三角形等等。
上述硅胶和弹簧支撑圈连接层1和3的厚度是上述压缩弹簧钢丝直径的3到5倍。所述硅胶和弹簧支撑圈连接层的厚度，根据垫芯的使用需要以及弹簧钢丝的粗细而改变。
上述硅胶是双组分加成型室温硫化硅橡胶。液体硅胶在模具中硫化连接的压缩弹簧，所述硅胶拉伸强度高、回弹力好、柔韧、无毒、无味、耐高温、耐低温、容易操作。硅胶的硬度可以根据弹簧的硬度改变。
上述弹簧是弹簧钢丝制作的压缩弹簧。根据垫芯需要，可以选用圆柱形压缩弹簧、中凹形压缩弹簧、中凸形压缩弹簧、宝塔形压缩弹簧、连体压缩弹簧、袋装压缩弹簧。可以通过改变弹簧形状、弹簧钢丝的直径或弹簧的数量来改变垫芯的软硬度，通过改变弹簧的高度来改变垫芯的薄厚度。
如图5所示一种硅胶硅胶连接弹簧的垫芯制备方法是通过以下具体步骤制作完成。
(1).模具制作：根据弹性垫芯的长宽制作出模具，在模具中设计出透气孔。
(2).模具中放入棉纤维：棉纤维是根据透气孔排序编织的棉纱网。
(3).模具中倒入液体硅胶：硅胶是液体双组分加成型室温硫化硅橡胶，液体硅胶双组混合后倒入模具中，硅胶的厚度是所用压缩弹簧钢丝直径的3到5倍。
(4).压缩弹簧的一端放入模具中：让模具中的液体硅胶包裹住弹簧的一端支撑圈。
(5).硅胶硫化；硅胶流平后即可硅胶硫化，可以室温硫化也可以加温硫化。
(6).脱模：硅胶完全固化后，把硅胶和弹簧从模具中取出，弹簧的一端即连接在一起，形成硅胶和弹簧一端支撑圈的连接层。
(7).模具中放入棉纤维：
(8).模具中倒入液体硅胶：
(9).弹簧的另一端放入模具中：
(10.硅胶硫化：
(11).脱模：硅胶完全固化后把硅胶和弹簧从模具中取出，弹簧的另一端被硅胶连接在一起，形成硅胶和弹簧另一端支撑圈的连接层。
通过上述制备方法，一种硅胶连接弹簧的垫芯制作完成。
以上所述仅对本发明较佳实例的描述，并不对本发明任何形式上的限制。任何未脱离本发明技术方案内容，依据本发明的技术实质私自所做的任何修改，等同变化，与修饰仍属于本发明技术方案的保护范围内。
工业实用性
本发明所用弹簧是制作床垫、坐垫的传统材料，制作技术已经成熟。所用硅橡胶在我们生活中已经广泛使用，所用硅橡胶容易操作，利用硅胶连接压缩弹簧制作垫芯可以规模化生产。
利用硅胶橡连接压缩弹簧生产的垫芯具有平整度好、透气、高弹力、无毒、无味、无响声、耐高温、耐低温、柔韧舒适等优点。
由于硅胶具有耐高温和耐低温的特性以及硅胶连接压缩弹簧垫芯的高透气性，利用硅橡胶连接压缩弹簧制作的垫芯可以用做各种通风冷暖车坐垫的垫芯，可以提高通风冷暖车坐垫的舒适度。

Claims (6)

  1. 一种用于床垫、坐垫、靠垫的垫芯，其特征在于：所述垫芯是硅胶连接压缩弹簧制成，垫芯是一个整体包括上中下三部分，上层是硅胶和弹簧上端支撑圈的连接层，中部是弹簧的有效圈部分，下层是硅胶和弹簧下端支撑圈的连接层，垫芯的上层和下层设计若干个透气孔。
  2. 根据权利要求1所述一种用于床垫、坐垫、靠垫的垫芯其特征在于：所述硅胶和弹簧支撑圈的连接层中加有棉纤维，棉纤维是根据透气孔排序编织的棉纱网。
  3. 根据权利要求1所述一种用于床垫、坐垫、靠垫的垫芯其特征在于：所述硅胶和弹簧支撑圈连接层的厚度是所用压缩弹簧钢丝直径的3到5倍。
  4. 根据权利要求1所述一种用于床垫、坐垫、靠垫的垫芯其特征在于：所述硅胶是双组分加成型室温硫化硅橡胶。
  5. 根据权利要求1所述一种用于床垫、坐垫、靠垫的垫芯其特征在于：所述弹簧是弹簧钢丝制作的压缩弹簧，包括圆柱形压缩弹簧、中凹形压缩弹簧、中凸形压缩弹簧、宝塔形压缩弹簧、连体压缩弹簧、袋装压缩弹簧。
  6. 根据权利要求1所述一种用于床垫、坐垫、靠垫的垫芯制备方法特征在于：利用液体硅胶在模具中硫化连接压缩弹簧，具体步骤如下：
    ①、模具制作，
    ②、模具中放入棉纤维，
    ③、模具中倒入液体硅胶，
    ④、弹簧的一端放入模具中，
    ⑤、硅胶硫化，
    ⑥、脱模，
    ⑦、模具中放入棉纤维，
    ⑧、模具中倒入液体硅胶，
    ⑨、弹簧的另一端放入模具中，
    ⑩、硅胶硫化，
    Figure PCTCN2017000545-appb-100001
    脱模。
PCT/CN2017/000545 2016-09-21 2017-08-30 一种用于床垫、坐垫、靠垫的垫芯 WO2018053973A1 (zh)

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