Patent Publication Number: US-10786087-B2

Title: Electric bed with independent adjusting device for waist rest

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a bed and, more particularly, to an electric bed. 
     2. Description of the Related Art 
     A conventional electric bed comprises a back board that is pivoted to change its inclined angle, so that the inclined angle of the back board can be adjusted according to a user&#39;s requirement to provide a comfortable sensation to the user when lying on the electric bed. However, when the user&#39;s back rests on the back board, the user&#39;s waist does not have any support, so that the user easily feels uncomfortable. Another conventional electric bed comprises a back board and a waist rest. When the back board is pushed and pivoted by an electric cylinder to change its inclined angle, the waist rest is also pushed and moved by the electric cylinder. Thus, when the electric bed is disposed at an inclined state, the user&#39;s waist is supported by the waist rest. However, when the electric bed is disposed at a horizontal state, the waist rest is also disposed at a horizontal state, so that the user&#39;s waist does not have any support when lying down. 
     BRIEF SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide an electric bed with an independent adjusting device for waist rest and support. 
     In accordance with the present invention, there is provided an electric bed comprising a bed board unit, and an adjusting device mounted on a bottom of the bed board unit. The bed board unit includes a head board, a back board, a waist board, a hip board, a leg board and a foot board. The bed board unit further includes a bed frame located under the head board, the back board, the waist board, the hip board, the leg board and the foot board. The adjusting device includes a driving unit, a support unit, at least one track unit and at least one hinge unit. The driving unit includes an electric cylinder and a push rod. The electric cylinder is secured on a bottom of the hip board. The support unit includes a first support bar and a second support bar. The first support bar is mounted on a bottom of the waist board and connected with the push rod. The second support bar is mounted on the bottom of the hip board. The first support bar is provided with a mounting bracket connected with the push rod. The at least one track unit includes a slideway and a slide. The slideway is mounted on the bed frame and located at two sides of the back board and the head board. The slide is mounted on a bottom of the back board and is slidable on the slideway. The at least one hinge unit includes a first hinge and a second hinge. The first hinge has a first end connected with the first support bar and a second end connected with the second support bar. The second hinge has a first end mounted on mounted on the bottom of the back board and a second end mounted on the bottom of the waist board. 
     According to the primary advantage of the present invention, the waist board is pushed by the electric cylinder when the back board lies or is lifted, so that the waist board is operated independently and is lifted or lowered freely according to the user&#39;s requirement. 
     Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S) 
         FIG. 1  is an exploded perspective view of an adjusting device in accordance with the preferred embodiment of the present invention. 
         FIG. 2  is an exploded perspective view of a support unit of the adjusting device in accordance with the preferred embodiment of the present invention. 
         FIG. 3  is a perspective view of the support unit of the adjusting device in accordance with the preferred embodiment of the present invention. 
         FIG. 4  is an exploded perspective view of a track unit of the adjusting device in accordance with the preferred embodiment of the present invention. 
         FIG. 5  is a perspective assembly view of the track unit of the adjusting device in accordance with the preferred embodiment of the present invention. 
         FIG. 6  is an exploded perspective view of a hinge unit of the adjusting device in accordance with the preferred embodiment of the present invention. 
         FIG. 7  is a bottom perspective view of an electric bed in accordance with the preferred embodiment of the present invention. 
         FIG. 8  is a bottom view of the electric bed in accordance with the preferred embodiment of the present invention. 
         FIG. 9  is a perspective view of the electric bed before use. 
         FIG. 10  is a side view of the electric bed before use. 
         FIG. 11  is a perspective view of the electric bed in use. 
         FIG. 12  is a side view of the electric bed in use. 
         FIG. 13  is another side view of the electric bed before use. 
         FIG. 14  is another side view of the electric bed before use. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to the drawings and initially to  FIG. 1 , an electric bed in accordance with the preferred embodiment of the present invention comprises an adjusting device. The adjusting device includes a driving unit  10 , a support unit  11 , at least one track unit  12  and at least one hinge unit  13 . The driving unit  10  includes an electric cylinder  100  and a push rod  101 . The support unit  11  includes a first support bar  110  and a second support bar  111 . Each of the first support bar  110  and the second support bar  111  has an elongate shape. The at least one track unit  12  includes a slideway  120  and a slide  121 . The at least one hinge unit  13  includes a first hinge  130  and a second hinge  131 . The first hinge  130  is secured between the first support bar  110  and the second support bar  111 . The second hinge  131  is mounted on a bed board. 
     In the preferred embodiment of the present invention, the adjusting device includes two track units  12  and two hinge units  13 . 
     Referring now to  FIGS. 2 and 3 , the first support bar  110  is provided with a mounting bracket  1100  connected with the push rod  101  by screwing. The first hinge  130  has a first end  1300  connected with the first support bar  110  and a second end  1301  connected with the second support bar  111 . The first end  1300  and the second end  1301  of the first hinge  130  are connected pivotally. 
     Referring now to  FIGS. 4 and 5 , the slideway  120  is mounted on a bed board, and the slide  121  is provided with a roller  1210  rotatably mounted in the slideway  120 , so that the slide  121  is slidable on the slideway  120 . 
     Referring now to  FIG. 6 , the second hinge  131  has a first end  1310  mounted on a bed board and a second end  1311  mounted on a bed board. 
     Referring now to  FIGS. 7 and 8 , the electric bed further comprises a bed board unit  2 , and the adjusting device is mounted on the bed board unit  2 . The bed board unit  2  includes a head board  20 , a back board  21 , a waist board  22 , a hip board  23 , a leg board  24  and a foot board  25 . The bed board unit  2  further includes a bed frame  26  located under the head board  20 , the back board  21 , the waist board  22 , the hip board  23 , the leg board  24  and the foot board  25  for supporting the head board  20 , the back board  21 , the waist board  22 , the hip board  23 , the leg board  24  and the foot board  25 . The electric cylinder  100  is secured on the bottom of the hip board  23 . The push rod  101  is extended and connected with the mounting bracket  1100 . The first support bar  110  is mounted on the bottom of the waist board  22  and connected with the push rod  101 , so that the push rod  101  is driven to push the waist board  22 . The second support bar  111  is mounted on the bottom of the hip board  23 . The first end  1300  of the first hinge  130  is mounted on the first support bar  110 , and the second end  1301  of the first hinge  130  is mounted on the second support bar  111 . Thus, the first hinge  130  is connected between the first support bar  110  and the second support bar  111 , so that the first hinge  130  is connected between the waist board  22  and the hip board  23 . The first end  1310  of the second hinge  131  is mounted on the bottom of the back board  21  by screwing, and the second end  1311  of the second hinge  131  is mounted on the bottom of the waist board  22  by screwing. Thus, the second hinge  131  is connected between the back board  21  and the waist board  22 . The slideway  120  is mounted on the bed frame  26  and located at two sides of the back board  21  and the head board  20 . The slide  121  is mounted on the bottom of the back board  21 . 
     Referring now to  FIGS. 9 and 10 , the head board  20  and the back board  21  are lifted before use. Preferably, the head board  20  and the back board  21  are lifted by another electric cylinder. 
     Referring now to  FIGS. 11 and 12 , the first hinge  130  is connected between the waist board  22  and the hip board  23 , so that when the push rod  101  pushes the waist board  22  upward, the lower end of the waist board  22  is pivoted upward by action of the first hinge  130 . At this time, the second hinge  131  is connected between the back board  21  and the waist board  22 , so that the upper end of the waist board  22  is moved upward by action of the second hinge  131  and forms an angle. At the same time, the waist board  22  pushes the back board  21  when the push rod  101  is pushed by the electric cylinder  100 , so that the slide  121 , which is mounted on the back board  21 , slides upward in the slideway  120 . Thus, the waist board  22  is pushed upward. 
     Referring now to  FIG. 13 , the head board  20  and the back board  21  are disposed at a horizontal state before use. 
     Referring now to  FIG. 14 , the first hinge  130  is connected between the waist board  22  and the hip board  23 , so that when the push rod  101  pushes the waist board  22  upward, the lower end of the waist board  22  is pivoted upward by action of the first hinge  130 . At this time, the second hinge  131  is connected between the back board  21  and the waist board  22 , so that the upper end of the waist board  22  is moved upward by action of the second hinge  131  and forms an angle. At the same time, the waist board  22  pulls the back board  21  when the push rod  101  is pulled by the electric cylinder  100 , so that the slide  121 , which is mounted on the back board  21 , slides downward in the slideway  120 . Thus, the waist board  22  is pushed upward. 
     In conclusion, the driving unit  10  is used to push the waist board  22  so as to lift or lower the waist board  22 , the support unit  11  is used to support the waist board  22  and is pushed by the driving unit  10 , the at least one track unit  12  is used to drive movement of the back board  21 , and the at least one hinge unit  13  is used to connect the back board  21  and the waist board  22  when the waist board  22  is lifted or lowered. 
     Accordingly, the waist board  22  is pushed by the electric cylinder  100  when the back board  21  lies or is lifted, so that the waist board  22  is operated independently and is lifted or lowered freely according to the user&#39;s requirement, to facilitate the user operating the waist board  22 , and to provide a comfortable sensation to the user when lying on the electric bed. 
     Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the scope of the invention.