Patent Publication Number: US-8109576-B2

Title: Seat assembly

Description:
BACKGROUND OF THE INVENTION 
     1. Fields of the Invention 
     The present invention relates to a seat assembly, especially to a seat assembly in which a circumference of a cloth surface is bent several times and injected material for a frame infiltrates into pores of the cloth surface completely so as to integrate and connect the circumference of the cloth surface with the frame as well as the support tightly. 
     2. Descriptions of Related Art 
     While sitting on a seat, the seat provides people with greater comfort. Chairs with various designs are with different functions such as supporting, blocking up or leaning. A general seat consists of a seat cushion, a seat back and a headrest respectively providing user&#39;s bottom, back and head support. The seat cushion, the seat back and the headrest all includes a support, a cloth surface and a frame that connects the cloth surface with the support. 
     Refer to  FIG. 10 , a general seat assembly available now includes a support  5 , a cloth surface  6  and a frame  7 . A joining slot  51  is formed on the support  5  and a joining block  71  corresponding to and mounted into the joining slot  51  is formed on the frame  7 . Thereby an edge of the cloth surface  6  folded and mounted into the joining slot  51  is pressed and fixed between the support  5  and the frame  7 . 
     However, when a person sits on the seat, most of his weight is distributed over the cloth surface  6 . After prolonged use, the edge of the cloth surface  6  fixed between the support  5  and the frame  7  begin to wear and slip and finally break along a connection area between the joining slot  51  of the support  5  and the joining block  71  of the frame  7 . The seat is damaged. 
     Thus there is a need to provide a new design of the seat assembly formed by the support  5 , the frame  7  and the cloth surface  6  connected with one another. The novel seat assembly can overcome shortcomings of conventional seat assembly in which slipping and detaching of the cloth surface  6  occur after the edge of the cloth surface  6  receiving user&#39;s weight on the seat for a long period. 
     SUMMARY OF THE INVENTION 
     Therefore it is a primary object of the present invention to provide a seat assembly in which a circumference of a cloth surface is connected and integrated with a frame and with a support firmly. 
     In order to achieve above object, a seat assembly according to the present invention includes a support, a cloth surface and a frame. 
     The support includes a connection slot formed around a circumference of a rear side thereof, an assembly block projectingly arranged at a center of the connection slot, and at least one channel penetrating from one side to the other side of the assembly block. The connection slot is divided into an outer connection slot and an inner connection slot by the assembly block. 
     The cloth surface covers the support from a front side of the support to a rear side of the support. A circumference of the cloth surface is mounted in the outer connection slot, located on one side of the assembly block  12 , and then passing through the channel on the assembly block and bending to the other side of the assembly block to be attached to the other side of the assembly block that faces the inner connection slot. 
     The frame is formed by injection molding and is covering the circumference of the rear side of the support. The frame is filled into the connection slot of the support and the channel of the assembly block so as to integrate with the support and the circumference of the cloth surface that passes through both the connection slot and the channel of the assembly block. 
     Thereby the circumference of the cloth surface is bent several times and the injected material for the frame infiltrates into pores of the cloth surface completely. Thus the circumference of the cloth surface is connected and integrated with the frame as well as the support firmly. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein: 
         FIG. 1  is an explosive view of an embodiment according to the present invention; 
         FIG. 2  is a partial enlarged view of an embodiment according to the present invention; 
         FIG. 3  is a schematic drawing showing filling of frame material of an embodiment according to the present invention; 
         FIG. 4  is a schematic drawing showing filling of frame material of an embodiment according to the present invention; 
         FIG. 5  is a schematic drawing showing filling of frame material of an embodiment according to the present invention; 
         FIG. 6  is a front cross sectional view of an embodiment according to the present invention; 
         FIG. 7  is a top cross sectional view of an embodiment according to the present invention; 
         FIG. 8  is a schematic drawing showing filling of frame material of another embodiment according to the present invention; 
         FIG. 9  is a schematic drawing showing filling of frame material of another embodiment according to the present invention; 
         FIG. 10  is a schematic drawing showing an assembly state of a seat assembly available now. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Refer to  FIG. 1  and  FIG. 2 , a seat assembly of the present invention includes a support  1 , a cloth surface  2  and a frame  3 . 
     The support  1  consists of a connection slot  11  formed around a circumference of a rear side thereof, an assembly block  12  projectingly arranged at a center of the connection slot  11 , and at least one channel  13  that penetrates from one side to the other side of the assembly block  12 . Moreover, the connection slot  11  is divided into an outer connection slot  111  and an inner connection slot  112  by the assembly block  12 . A mold  4  for forming the frame  3  is disposed with a first injection point  41  and a second injection point  42  respectively corresponding to the outer connection slot  111  and the inner connection slot  112 , as shown in  FIG. 3  and  FIG. 8 . 
     Refer to  FIG. 3  and  FIG. 4 , the cloth surface  2  covers the support  1  from the front side of the support  1  to the rear side thereof. A circumference of the cloth surface  2  is mounted into the outer connection slot  111 , extending from one side of the assembly block  12 , passing through the channel  13  on the assembly block  12  and bending to the other side of the assembly block  12  to be attached to the other side of the assembly block  12  that is in the inner connection slot  112 . 
     As shown in  FIG. 5 , the frame  3  formed by injection molding covers the circumference of the rear side of the support  1 . The frame  3  is filled into the connection slot  11  of the support  1  and the channel  13  of the assembly block  12  so as to integrate with the support  1  and the circumference of the cloth surface  2  that passes through both the connection slot  11  and the channel  13  of the assembly block  12 . 
     Back to  FIG. 3 , during manufacturing processes, the cloth surface  2  is pulled and covered from the front side of the support  1  to the rear side of the support  1  so that the circumference of the cloth surface  2  is mounted into the outer connection slot  111  on the rear side of the support  1 . 
     Then the mold  4  for forming the frame  3  is set on the rear side of the support  1  and is pressed against the cloth surface  2  pulled and covered on the rear side of the support  1  so as to fix the cloth surface  2 . Refer to  FIG. 4  and  FIG. 5 , next liquid material for the frame  3  is filled into the outer connection slot  111  of the support  1  through the first injection point  41  that is corresponding to the outer connection slot  111  of the support  1 . By the flowing and driving of the liquid material for the frame  3 , the circumference of the cloth surface  2  inside the outer connection slot  111  of the support  1  is extending from one side of the assembly block  12  of the support  1 , through the channel  13  of the assembly block  12  and to the other side of the assembly block  12  facing the inner connection slot  112 . Thus the circumference of the cloth surface  2  is connected and integrated with the frame  3  and the support  1  firmly. 
     Refer to  FIG. 6  and  FIG. 7 , along with the filling of the liquid material for the frame  3  into the connection slot  11  of the support  1 , the circumference of the cloth surface  2  also is flowing with the liquid material for the frame  3 , moved to against one side of the assembly block  12 , passing through the channel  13  of the assembly block  12  and flowing to attach to the other side of the assembly block  12 . During these processes, the liquid material for the frame  3  infiltrates into pores of the cloth surface  2  completely so as to connect with the cloth surface  2  firmly. Furthermore, the circumference of the cloth surface  2  flows with the liquid material for the frame  3  and bends several times along two sides of the assembly block  12  and the channel  13  so that bonding strength between the circumference of the cloth surface  2  and the support is improved effectively. 
     Thereby by the integrated connection between the circumference of the cloth surface  2  and the frame  3  as well as the integrated connection between the circumference of the cloth surface  2  and the support  1 , the connection fastness of the cloth surface  2  with the frame  3  and the support  1  is increased dramatically. The cloth surface  2  still has been fastened tightly with the frame  3  as well as with the support  1  without slipping and detaching even after receiving a load of user&#39;s weight for a long period. 
     Refer to  FIG. 8  and  FIG. 9 , another embodiment of the present invention is revealed. The circumference of the cloth surface  2  is pulled over a top of the assembly block  12  of the support  1 , bent, inserted into the inner connection slot  112  and then is moved along one side of the assembly block  12 . Then the mold  4  for forming the frame  3  is installed on the rear side of the support  1  and is pressed against the cloth surface  2  pulled to the rear side of the support  1  so as to fix the cloth surface  2 . The mold is disposed with a second injection point  42  that is corresponding to the inner connection slot  112  of the support  1 . Next liquid material for the frame  3  is filled into the inner connection slot  112  of the support  1  through the second injection point  42  of the mold  4 . Thereby when the liquid material for the frame  3  is filled through the second injection point  42  into the inner connection slot  112  of the support  1 , the liquid material for the frame  3  pulls the circumference of the cloth surface  2  from the inner connection slot  112 , through the channel  13  of the assembly block  12 , to the outer connection slot  111  and attach to the other side of the assembly block  12 . Moreover, the liquid material for the frame  3  fills the outer connection slot  111  as well as the inner connection slot  112  and covers the whole assembly block  12 . Thus the circumference of the cloth surface  2  is integrated and secured with the frame  3  and, the support  1  more firmly. 
     In summary, the seat assembly of the present invention has following advantages: 
     1. The circumference of the cloth surface is bent and mounted into the connection slot of the support and then liquid material for the frame is filled into the connection slot of the support so as to make the circumference of the cloth surface move along with the liquid material for the frame, from one side of the connection slot, through the channel of the assembly bloc, to the other side of the connection slot. Thus the cloth surface is connected and integrated with the frame as well as the support firmly by multiple bends of the circumference of the cloth surface and infiltration of liquid material for the frame into pores of the cloth surface.
 
2. According to different positions of the injection point of the liquid material for the frame, the circumference of the cloth surface is pulled to different positions in the connection slot of the support. When the material is filled through the connection slot at a lower position, the circumference of the cloth surface is pulled over a top of the assembly block to be mounted into the connection slot at the lower position. Then along with the liquid material for the frame, the circumference of the cloth surface passing through the channel of the assembly block is driven to the connection slot at an upper position. Through this process, the circumference of the cloth surface is bent one more time and connection strength between the cloth surface and the frame as well as the support is increased.
 
     Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details, and representative devices shown and described herein. Accordingly; various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.