KR20060027005A - Device for bed spread a combined use sofa - Google Patents

Abstract

The present invention relates to a sofa bed deployment device.

The present invention is configured to store the two-stage sheet in the sofa and then the two-stage sheet to be sequentially developed in the horizontal and vertical direction from the driving of the motor, so that the sofa can be easily transformed into a bed only by the user's switch operation. It is possible to improve the inconvenience that the user must directly transform the sofa into a bed as in the conventional, as well as the sofa unfolding bed deployment apparatus that provides the same comfort as the structural characteristics of a conventional sofa.

Sofa, Bed, Seat Box, Hydraulic Tank, Solenoid Valve

Description

Bed spreader for sofa use {Device for bed spread a combined use sofa}

1 is a perspective view showing a sofa unfolding device as an embodiment of the present invention.

Figure 2 is a plan view showing a bed unfolding device for a sofa as an embodiment of the present invention.

Figure 3 is a side view showing a sofa bed unfolding device as an embodiment of the present invention.

Figure 4 is a state of storage of the sheet as line A-A of Figure 2 in one embodiment of the present invention.

5 is a cross-sectional view of the sheet as A-A cross-sectional view of Figure 2 in one embodiment of the present invention.

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 2 according to one embodiment of the present invention; FIG.

FIG. 7 is a cross-sectional view of a sheet taken along line B-B of FIG. 2 according to one embodiment of the present invention; FIG.

* Description of the symbols for the main parts of the drawings *

One ; Backrest 2; Seat

3; Handle portion 11; Hydraulic tank

12; Hydraulic motor pump 13; hose

21,22; First and second seat boxes 23,24; 1st and 2nd sheet

25; Castors 31,32,41,42; 1, 2, 3, 4 folding rod

47; Support rod 51; Motor control switch

52,53; First and second left and right control switches 54 and 55; 1st and 2nd height adjustment switch

56; Cover 100; Sofa

200; Hinge axes 33,34,43,44; 1,2,3,4 piston rod

35,36,45,46; 1,2,3,4 cylinder part

The present invention relates to a sofa unfolding device, more specifically, a sofa unfolding device for storing the two-stage sheet in the sofa and the two-seat sheet developed by the driving of the motor can be used as a bed It is about.

Modern society is subdivided into a spacious flat house with separate bedroom and living room, a small living room even though the bedroom and living room are separated, and a home without a distinction between bedroom and living room.

In this case, a bed for sleeping is provided in the bedroom or living room, and a sofa or the like is provided in the living room.

However, in the case of a spacious flat house, there is no difficulty in separately configuring the bed and the sofa as described above, but even if the bedroom and the living room are separated, the living room has a small equilibrium so that the bedroom can be used as a living room, or In the case of a residential space with no distinction, there was a structural disadvantage that a bed and a sofa could not be provided at the same time.

Therefore, in the related art, furniture that can be used as a bed and a sofa has been developed, but the furniture of the sofa bed can be stored by folding while moving through a caster, which is a three-stage sheet folded in series. After this configuration was made possible to adjust the angle of the seat positioned on the leg as well as the seat located on the head from the shoulder portion.

However, while the sofa bed as described above has the advantage of increasing the utilization of the living space, the development and folding of the sofa is composed of a manual type that must be folded or unfolded by the user, rather than an electric type, and thus insufficient in convenience of use. I had to do it.

In addition, the above-mentioned sofa bed structure is not only the angle adjustment for the seat of the shoulder and headrest portion and the seat of the legrest portion, but did not provide the structural features of the sofa generally provided.

In other words, the conventional sofa bed can be used as a bed when the three-stage seats are arranged in a row, but the seat supporting the head, shoulders and legs is only possible to adjust the angle, usually provided It did not provide the comfort of the sofa.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, the present invention, after storing the second stage seats in the sofa, the second stage seats are sequentially developed in the horizontal and vertical direction from the drive of the motor By making it easy, the sofa can be easily transformed into a bed only by the user's switch operation, thereby improving the inconvenience of the user having to directly transform the sofa into a bed, as well as the comfort that is a structural feature of a conventional sofa. It is an object of the present invention to provide a sofa bed deployment device that can provide the same.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 1 is a perspective view showing a sofa unfolding device in one embodiment of the present invention, Figure 2 is a plan view showing a sofa unfolding device in an embodiment of the present invention, Figure 3 is an embodiment of the present invention An example is a side view of a sofa bed deployment device.

Figure 4 is a state of storage of the sheet as the AA line of Figure 2 as an embodiment of the present invention, Figure 5 is a development state of the sheet as a cross-sectional view of the line AA of Figure 2 as an embodiment of the present invention, Figure 6 is the present invention 2 is a view illustrating the sheet as a cross-sectional view taken along line BB of FIG. 2, and FIG. 7 is a diagram illustrating a developed state of the sheet as a cross-sectional view taken along line BB of FIG.

As shown in Figures 1 to 7, the back portion 1 and the seating portion (2) is formed in a width that can be seated by a variety of users, the handle portion (3) on both sides of the seating portion (2) In the formed sofa 100,

A driving member accommodated in the backrest part 1;

It is stored at the lower end of the seat 2 and is developed at the same height as the seat 2 of the sofa 100 so that the slide movement is sequentially performed in the left and right and / or up and down directions from the driving of the driving member to be used as a bed. Sheet member;

A left and right moving member which is received at a lower end of the seat part 2 and connected with a seat member, and slides the seat member in a left and right direction when the driving member is driven;

Located in the lower surface of the sheet member, the movable member for sliding the sheet member moved left and right in the vertical direction when the drive member is driven; And,

An actuating member formed on the handle part 3 to turn on / off a driving member; It is characterized by the configuration.

According to another aspect, the driving member,

Hydraulic tank 11 configured in the backrest part 1,

A hydraulic motor pump 12 connected to the hydraulic tank 11 to pump hydraulic pressure;

Is connected through the hydraulic motor pump 12 and the hose 13, the opening and closing from the on / off of the operating member to supply the hydraulic pressure pumped by the hydraulic motor pump 12 to the left and right and / or moving copper member It is characterized by consisting of the first to eighth solenoid valve (S1, S2, S3, S4, S5, S6, S7, S8).

According to yet another aspect, the sheet member,

The first seat box 21 is formed of the first and second stacked ends (A) (B) and accommodated in the lower end of the seat portion 2 so as to be movable left and right,

The second sheet is accommodated in the second stacking end B of the first seat box 21 and the first sheet left and right simultaneously with the left and right movement of the first seat box 21, and then the second sheet with its own secondary left and right movement. Box (22),

A first sheet 23 accommodated in the first stacked end A of the first seat box 21 and slidably moved upward and downward;

The second sheet box 22 is accommodated in the second sheet box 22, and is configured to slide upward and downward to maintain the same height as the first sheet 23.

According to another aspect,

On both sides of the first seat box 21 is formed a panel coupling portion (21a) of the U-shape is coupled in a manner that covers both sides of the second seat box 22 so as to be movable in the left and right directions. It is done.

According to another surface, the bottom of the first and second seat boxes 21, 22,

Each caster 25 for guiding the slide movement in the left and right directions is easily formed.

According to yet another aspect, the left and right moving members,

The first folding rod 31 is located in the storage space of the sofa 100 and folds around the hinge shaft 200 for the left and right slide movement of the first seat box 21.

The second folding rod 32 which is located in the second stacking end B of the first seat box 21 and folds around the hinge shaft 200 for lateral slide movement of the second seat box 22. ,

First and second piston rods 33 and 34 which are connected to the first and second folding rods 31 and 32 and linearly reciprocate to fold the first and second folding rods 31 and 32. ),

The first and second solenoid valves S1 and S2 are connected to each other via a hose 13, and the straight line of the first piston rod 33 is supplied according to the hydraulic pressure selectively supplied to the first and second solenoid valves S1 and S2. A first cylinder portion 35 for controlling the movement,

Connected to the third and fourth solenoid valves S3 and S4 through the hose 13, the straight line of the second piston rod 34 according to the hydraulic pressure selectively supplied to the third and fourth solenoid valves S3 and S4. Characterized in that it consists of a second cylinder portion 36 for controlling the movement.

According to another aspect, the shandong copper member,

A third folding rod 41 connected to the first seat box 21 and the first seat 23 and foldable around the hinge shaft 200 for vertically sliding movement of the first seat 23;

The fourth folding rod 42 connected to the second seat box 22 and the second seat 24 to be folded around the hinge shaft 200 for vertically moving the second seat box 22. ,

Third and fourth piston rods 43 and 44 connected to the third and fourth folding rods 41 and 42, and linearly reciprocating to fold the third and fourth folding rods 41 and 42. ),

Connected to the fifth and sixth solenoid valves S5 and S5 through the hose 13, and the straight line of the third piston rod 43 according to the hydraulic pressure selectively supplied to the fifth and sixth solenoid valves S5 and S6. A third cylinder portion 45 for controlling the movement,

The seventh and eighth solenoid valves S7 and S8 are connected to each other through the hoses 13, and the straight line of the fourth piston rod 44 is supplied according to the hydraulic pressure selectively supplied to the seventh and eighth solenoid valves S7 and S8. A fourth cylinder portion 46 for controlling the movement,

The third and fourth cylinders 45 and 46 and the hinge shaft 200 is characterized in that it consists of a support rod 47.

Here, the folding length of the fourth folding rod 42 is set to twice or more than the folding length of the third contacting rod 41 so that the height of the second sheet 24 rises in accordance with the height of the first sheet 23. It was.

According to yet another aspect, the operating member,

Motor control switch 51 formed on the handle portion 3 of the sofa 100 to turn on / off the drive of the hydraulic motor pump,

When the hydraulic pumping in the hydraulic tank 11 is performed by the driving of the motor control switch 51, the first to fourth solenoid valves S1 to supply the pumped hydraulic pressure to the first and second cylinder parts 35 and 36. (S2) (S3) (S4), the first and second left and right control switch 52, 53 for controlling the opening and closing state,

When the hydraulic pumping in the hydraulic tank 11 is made by the driving of the motor control switch 51, the fifth to eighth solenoid valves S5 to supply the pumped hydraulic pressure to the third and fourth cylinder parts 45 and 46. (S6) (S7) (S8), the first and second height control switch 54, 55 for controlling the opening and closing state, and

It is characterized by consisting of a cover 56 for protecting each of the switches 51, 52, 53, 54, 55.

Here, the first to fourth folding rods 31, 32, 41 and 42 are two rods connected to the hinge shaft 200 to perform folding operation. I did not.

In addition, the first to fourth folding rods 31, 32, 41, 42, the first to fourth piston rods 33, 34, 43, 44, and the first to fourth cylinder portions (35) (36) (45) (46), as well as the eighth to eighth solenoid valves (S1, S2, S3, S4, S5, S6, S7, S8) are shown for the portion shown in the drawings for convenience of description. The side and first sides of the first and second seat boxes 21 and 22 are easily deviated by the left and right slide operation of the first and second seats 23 and 24 and the slide operation with respect to the vertical direction. , 2 is designed to have a plurality formed on the bottom surface of the sheet (23) (24).

Referring to Figures 1 to 7 attached to the operation of an embodiment of the present invention configured as described above are as follows.

First, in a state where the user is using the sofa 100 indoors, in order to use the sofa 100 as a bed, the cover 56 formed on the handle part 3 of the sofa 100 is opened, and then the operating member Press the first left and right adjustment switch 52 included.

Then, the first and third solenoid valves S1 and S3 in the left and right moving members located in the backrest part 1 of the sofa 100 are opened from the pressing operation of the first left and right control switch 52.

That is, the first and third solenoid valves S1 and S3 are connected to one ends of the first and second cylinder parts 35 and 36 to linearly move the first and second piston rods 33 and 34. The second and fourth solenoid valves S2 and S4 are connected to the other ends of the first and second cylinder parts 35 and 36 to linearly return the first and second piston rods 33 and 34.

In order to convert the sofa 100 into a bed, all of the first and third solenoid valves S1 and S3 are opened.

Subsequently, when the user turns on the motor control switch 51 included in the operating member, the driving member in the backrest part 1, that is, the hydraulic motor pump 12, is driven from the on operation of the motor control switch 51 to operate the hydraulic pressure. The oil pressure in the tank 11 is pumped.

Then, the pumped hydraulic pressure is supplied to one end of the first and second cylinder parts 35 and 36 through the opened first and third solenoid valves S1 and S3 and the hose 13.

The first and second piston rods 33 and 34 coupled to the first and second cylinder parts 35 and 36 are in a straight line (forward) motion.

At this time, the first and second piston rods 33 and 34 are connected to the first and second folding rods 31 and 32 to be foldably connected to the hinge shaft 200, and the first and second piston rods 33 and 34 are connected to each other. Since the second folding rods 31 and 32 are in a folded state, the lengths of the first and second folding rods 31 and 32 have a length from the linear movement of the first and second piston rods 33 and 34. In other words, the expanding operation is performed in the folded state.

Accordingly, the sofa seat part 2 is connected to the first and second folding rods 31 and 32 and the hinge shaft 200 from the unfolding operation of the first and second folding rods 31 and 32. The first seat box 21 accommodated at the lower end of the sofa protrudes outward from the lower end of the sofa 100 while the rolling operation is made through the caster 25 formed in the bottom portion.

In this case, the first seat box 21 is composed of first and second stacked ends (A) and (B), and a first sheet 23 is formed in the first stacked ends (A). The second stack box 22 is accommodated in the second stacked end B,

The second seat box 22 has a forward motion of the first seat box 21, and a first forward motion by the first seat box 22, followed by rolling through the caster 25. While the operation is performed by the second folding rod 32 is a secondary forward operation, it is arranged side by side while maintaining a different height from the first seat box (21).

Then, the user presses the first height adjustment switch 54 of the operation member formed on the sofa handle 3.

Then, the fifth and seventh solenoid valves S5 and S7 in the left and right moving members positioned in the backrest part 1 of the sofa 100 are opened from the pressing operation of the first height adjusting switch 54.

That is, the fifth and seventh solenoid valves S5 and S7 are connected to one ends of the third and fourth cylinders 45 and 46 to linearly move the third and fourth piston rods 43 and 44. The sixth and eighth solenoid valves S6 and S8 are connected to the other ends of the third and fourth cylinder parts 45 and 46 to linearly return the third and fourth piston rods 43 and 44.

In order to convert the sofa 100 into a bed, all of the fifth and seventh solenoid valves S5 and S7 are opened.

Then, the hydraulic pressure in the hydraulic tank 11 from the opening of the fifth and seventh solenoid valves S5 and S7 is pumped by the hydraulic motor pump 12 to the third and fourth cylinder portions 45 through the hose 13. Supplied to one end of 46),

The third and fourth piston rods 43 and 44 coupled to the third and fourth cylinder parts 45 and 46 are in a linear (forward) motion.

At this time, the third and fourth piston rods 43 and 44 are connected to the third and fourth folding rods 41 and 42 to be foldably connected to the hinge shaft 200. The four folding rods 41 and 42 are initially folded between the first seat box 21 and the first seat 23 and between the second seat box 22 and the second seat 24, respectively. To keep the state

From the linear movement of the third and fourth piston rods 43 and 44, the third and fourth folding rods 41 and 42 are expanded in length, i.e., the unfolding operation is performed in the folded state.

Accordingly, the first and second sheets 23 connected to the third and fourth folding rods 41 and 42 and the hinge shaft 200 from the unfolding operation of the third and fourth folding rods 41 and 42. 24 is raised to the same height as the seating portion 2 of the sofa 100, the seating portion 2 and the first and second seats 23, 24 perform the function of a bed You can do it.

Thereafter, when the motor control switch 51 is turned off, the pumping operation of the hydraulic motor pump 12 is stopped from the off operation of the motor control switch 51 and the conversion of the bed of the sofa is completed.

Meanwhile, in order to convert the converted bed back to the sofa 100 as described above, the user turns on the motor control switch 51 of the operation member formed on the sofa handle 3 and then the second height adjustment switch 55. Press.

Then, the fifth and seventh solenoid valves S5 and S7 in the left and right moving members located in the backrest part 1 of the sofa 100 are closed from the pressing operation of the second height adjustment switch 55 and the sixth and eighth solenoids are closed. The valves S6 and S8 are both open.

That is, the sixth and eighth solenoid valves S6 and S8 are connected to the other ends of the third and fourth cylinders 45 and 46 to linearly return the third and fourth piston rods 43 and 44. , The fifth and seventh solenoid valves S5 and S7 are connected to one ends of the third and fourth cylinders 45 and 46 to linearly return the third and fourth piston rods 43 and 44. ,

In order to convert the bed into the sofa 100, the sixth and eighth solenoid valves S6 and S8 are all opened.

Then, the hydraulic pressure in the hydraulic tank 11 from the opening of the sixth and eighth solenoid valves S6 and S8 is pumped by the hydraulic motor pump 12 to the third and fourth cylinder portions 45 through the hose 13. Supplied to the other end of 46),

The third and fourth piston rods 43 and 44 coupled to the third and fourth cylinder parts 45 and 46 are linearly returned (reversed).

At this time, the third and fourth piston rods 43 and 44 are connected to the third and fourth folding rods 41 and 42 to be foldably connected to the hinge shaft 200. The four folding rods 41 and 42 are deployed between the first seat box 21 and the first seat 23 and between the second seat box 22 and the second seat 24, respectively. To maintain the operating state,

From the linear return movement of the third and fourth piston rods 43 and 44, the third and fourth folding rods 41 and 42 become smaller in length, that is, the folding operation is performed in the unfolding operation of unfolding.

Therefore, from the folding operation of the third and fourth folding rods 41 and 42, the first and second sheets 23 and 23 connected to the third and fourth folding rods 41 and 42 by the hinge shaft 200. 24 is lowered to a height that can be stored in the lower end of the sofa 100 while the height is lower than the seat (2) of the sofa (100).

Thereafter, when the user presses the second left / right adjustment switch 53 included in the operation member, the user moves the left / right moving member positioned in the backrest part 1 of the sofa 100 from the pressing operation of the second left / right adjustment switch 53. The first and third solenoid valves S1 and S3 are all closed, and the second and fourth solenoid valves S2 and S4 are all open.

That is, the second and fourth solenoid valves S2 and S4 have the other ends of the first and second cylinder parts 35 and 36 to linearly return (reverse) the first and second piston rods 33 and 34. First and third solenoid valves S1 and S3 are connected to one ends of the first and second cylinder parts 35 and 36 to linearly move the first and second piston rods 33 and 34. Bar,

In order to convert the bed into the sofa 100, the second and fourth solenoid valves S2 and S4 are all opened.

Here, since the driving member, ie, the hydraulic motor pump 12, in the backrest part 1 is pumping the hydraulic pressure in the hydraulic tank 11 from the ON operation of the motor control switch 51, the pumped hydraulic pressure is opened. It is supplied to the other end of the first and second cylinder parts 35 and 36 through the second and fourth solenoid valves S2 and S4 and the hoses 13,

The first and second piston rods 33 and 34 coupled to the first and second cylinder parts 35 and 36 are linearly returned (reversed).

At this time, the first and second piston rods 33 and 34 are connected to the first and second folding rods 31 and 32 to be foldably connected to the hinge shaft 200, and the first and second piston rods 33 and 34 are connected to each other. Since the second folding rods 31 and 32 are in the unfolding operation state, the first and second folding rods 31 and 32 are separated from the linear return movement of the first and second piston rods 33 and 34. The folding operation becomes smaller.

Therefore, from the folding operation of the first and second folding rods 31 and 32, the lower end of the sofa seat 2 is connected to the first and second folding rods 31 and 32 and the hinge shaft 200. The second seat box 22 protruding outward from the primary storage is made to the second laminated end (B) of the first seat box 21 while rolling through the caster 25.

At this time, the second seat box 22 is accommodated in the second stacked end (B) of the first seat box 21, and at the same time pushing the first seat box 21,

The first and second seat boxes 21 are both received at the lower end of the sofa 100, so that the user can use the sofa 100.

As described above, the present invention is configured to store the two-stage seats in the sofa and to sequentially deploy the two-stage seats in the horizontal and vertical directions from the driving of the motor, so that the sofa can be easily moved to the bed only by the user's switch operation. It is possible to deform to improve the inconvenience that the user must directly transform the sofa into a bed as in the conventional, as well as to provide the same comfort as the structural characteristics of a conventional sofa.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes are within the scope of the claims.

Claims (8)

In a sofa having a back portion and a seat portion in a width that can be seated by various users, and the handle portion is formed on both sides of the seat portion, A driving member accommodated in the backrest part; A seat member which is stored at a lower end of the seat and is developed at the same height as the seat of the sofa and sequentially slides left and right and / or up and down from the drive of the driving member to be used as a bed; A left and right moving member which is accommodated at a lower end of the seat part and connected to a seat member and slides the seat member in a left and right direction when the driving member is driven; Located in the lower surface of the sheet member, the movable member for sliding the sheet member moved left and right in the vertical direction when the drive member is driven; And, An operation member formed on the handle part to turn on / off a driving member; Sofa bed deployment device characterized in that the configuration. The method of claim 1, wherein the drive member, Hydraulic tank composed in the backrest part, A hydraulic motor pump connected to the hydraulic tank to pump hydraulic pressure; The first through the eighth solenoid valve is connected to the hydraulic motor pump through a hose, the opening and closing from the on / off of the operating member to supply the hydraulic pressure pumped by the hydraulic motor pump to the left and right and / or moving copper member. A sofa bed bed deployment apparatus characterized in that. The method of claim 1, wherein the sheet member, A first seat box formed of a first and second stacked ends and accommodated in left and right portions at a lower end of the seat; A second seat box which is accommodated in the second stacking end of the first seat box and moves first and second simultaneously with the left and right movement of the first seat box, and then has its own second left and right movement; A first sheet accommodated in a first stacking end of the first seat box and slidably moved up and down; The second seat box is accommodated in, the sofa bed deployment apparatus characterized in that it comprises a second sheet which is slid in the vertical direction to maintain the same height as the first sheet. According to claim 3, On both sides of the first seat box, A sofa-use bed deployment apparatus, characterized in that the U-shaped panel engaging portion is formed to be coupled in such a way as to cover both sides of the second seat box so that the slide movement in the left and right directions. The method of claim 3, wherein the bottom of the first and second seat boxes, A sofa unfolding device, characterized in that each caster is formed to guide the slide movement in the left and right directions easily. According to claim 1, The left and right moving member, A first folding rod which is located in the storage space of the sofa and which is folded around the hinge axis for the left and right slide movement of the first seat box, A second folding rod which is located in a second stacking end of the first seat box and which is folded around the hinge axis for lateral slide movement of the second seat box; A first and second piston rod connected to the first and second folding rods and linearly reciprocating to fold the first and second folding rods; A first cylinder part connected to the first and second solenoid valves via a hose and controlling the linear movement of the first piston rod according to the hydraulic pressure selectively supplied to the first and second solenoid valves; The second bed is connected to the third and fourth solenoid valves via a hose, and the second cylinder unit controls the linear movement of the second piston rod according to the hydraulic pressure supplied to the third and fourth solenoid valves. Deployment device. The method of claim 1, wherein the shandong copper member, A third folding rod connected to the first seat box and the first sheet and configured to fold about a hinge axis for vertical slide movement of the first sheet; A fourth folding rod connected to a second sheet box and a second sheet and foldable around a hinge axis for vertically moving the second sheet box; A third and fourth piston rod connected to the third and fourth folding rods and linearly reciprocating to fold the third and fourth folding rods; A third cylinder part connected to the fifth and sixth solenoid valves through a hose and controlling the linear movement of the third piston rod according to the hydraulic pressure selectively supplied to the fifth and sixth solenoid valves; A fourth cylinder part connected to the seventh and eighth solenoid valves through a hose and controlling the linear movement of the fourth piston rod according to the hydraulic pressure selected and supplied to the seventh and eighth solenoid valves; The sofa unfolding bed deployment apparatus comprising a support rod connected to the third and fourth cylinders and the hinge shaft. The method of claim 1, wherein the operation member, Motor control switch is formed on the handle portion of the sofa to turn on / off the drive of the hydraulic motor pump, First and second left and right control switches for controlling the opening and closing states of the first to fourth solenoid valves to supply the pumped hydraulic pressure to the first and second cylinder parts when the hydraulic pumping in the hydraulic tank is performed by the driving of the motor control switch; First and second height adjusting switches for controlling the opening and closing states of the fifth to eighth solenoid valves to supply the pumped hydraulic pressure to the third and fourth cylinder parts when the hydraulic pumping in the hydraulic tank is made by driving the motor control switch; A sofa-use bed deployment apparatus characterized by comprising a cover to protect each switch.

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