CN101332033A - Movable backrest and drive mechanism thereof - Google Patents

Abstract

The invention relates to an adjustable backrest and a dynamic mechanism thereof, which is the adjustable backrest that one or more than one adjustable backrest that can adjust the inclination by the electric way are arranged on the original backrest of a bed or a recliner; the top end of the backrest is pulled by a traction loop tensioned on the original backrest; the traction loop can be driven to lead the top end of the adjustable backrest to move upwardly and downwardly; the aim of adjusting the inclination of the adjustable backrest can be reached by the function of an adjustable support. The latest research abroad indicates that the semi-reclining position that keeps the leg and the spine to be about 135 degrees is the ideal sitting position which is beneficial to the health of the spine; the system can be adjusted to the posture conveniently. The use of the system can not only bring the convenience and comfort to the leisure life of people, but also bring health to the spines of users. The system can be used in the household life and can be widely used in high-grade places of beaches, shower, leisure, holidays, hotels, restaurants, and the like, or special places of hospitals or nursing houses, etc.

Description

Movable back and actuating unit thereof

Technical field:

Furniture

Background technology:

At present head of a bed backrest mostly be can not regulated at will fixed backrest, for thinking that half crouches and just can not achieve one's goal the people of leisure in bed; In addition, though the backrest of the chaise longue in places such as many sandy beaches, shower or leisure can be regulated gradient, the overwhelming majority needs manually-operated.And in existing patented technology, be the backrest of 02205955.5 the described tilt adjustable of patent documentation as the patent No., not only owing to be manual, and because the adjusting shelves of design are several fixing gears, so the gear limited amount uses inconvenience, its structure slightly complicated in addition.

Summary of the invention:

This invention relates to a secondary back rest and is installed in the movable back on the back rest and draws the traction loop of this movable back and the actuating unit of this traction loop of driving.

Described back rest is the upright backrest (frame) of a secondary bed head frame or a secondary chaise longue, top at this back rest is equipped with rubber roll, be fixed with worm-wheel shaft on the bottom rail of back rest, be inlaid with to this left and right sides symmetry and somely can draw dish with this volume that rotates synchronously.

Described traction loop hold on the described back rest backboard and fixedly backboard last bottom rail and be tensioned to rubber roll and volume draws on the dish.Two groups of volume drawstrings at one section traction belt of this bail route and these traction belt two ends of tractive are formed, wherein traction belt is stretched on the rubber roll, one group of volume drawstring wherein is at the vertical tractive traction belt of facing down of back rest, and its lower end is rolled up the axle center and the tensioning of drawing dish to above-mentioned corresponding volume in the direction of the clock; Another group volume drawstring wherein is tractive traction belt downward vertically at the back side of back rest, axle center from volume counterclockwise to above-mentioned corresponding volume and tensioning that its lower end is drawn dish by.

Described movable back is positioned at the front of back rest, and its top is attached to by special-purpose connector on the specific site of above-mentioned traction loop, and the waist of this movable back by the root of the backboard on movable supporting and the back rest takes place moving the connection.The top of movable back can move up and down with the reciprocating motion of traction loop, and the gradient of movable back is changed.

Described actuating unit comprises that a cover drives the worm and worm gear of aforementioned worm-wheel shaft and the reversing dc motor that drives this worm and worm gear.Described worm and worm gear both can drive worm-wheel shaft and drive volume on this and draw dish to rotate synchronously, can draw volume again and fold positioning action, volume draws dish by the volume drawstring traction loop to be risen again and drives and positioning action, finally displacement and positioning action are played in the top that is attached to the movable back on this traction loop, thereby reach the purpose of the gradient of regulating movable back.

This invention is because the weak point that prior art is existed has proposed new solution, and compared with the prior art, structure is simpler; So because it is more convenient to take electronic mode of traction and the stepless scheme of transferring the files to use, effect is better; Owing to having adopted rubber roll and traction belt to make style more attractive in appearance.Latest research shows that keeping leg to become the semireclining position about 135 degree with backbone is the desirable sitting posture that is beneficial to backbone health most, and this cover system can be adjusted to such position easily.So the use of this cover system brings convenience with comfortable not only for people's recreation, bring health also can for simultaneously user's backbone.This cover system both can be used at home life, can be sandy beach, shower again, lies fallow, spent a holiday, hotel contour shunting yard institute or special place such as hospital, home for destitute be extensive use of.

Description of drawings:

Fig. 1, be installed in a pair of movable back and actuating unit schematic diagram 1-back rest 2a thereof on the double bed back rest, a b-left side, the two V guide rail 7-movable supporting 8-movable supporting of right movable back 3-traction belt 4-rubber roll 5-backboard 6-are taken in groove 9a, b-back rest front, back side volume drawstring 10-volume draws dish 11-worm gear axle bed 12-reversing dc motor 13-worm and worm gear 14-back rest bottom rail 15-back rest center up-and-down rod 16-bedstead fastener 17-rubber roller axle bed 18a, on behind the b-backboard, the special-purpose connector 20-of bottom rail 19-worm-wheel shaft (draw-off mechanism of movable back 2b omits in Fig. 1)

A-A ' the cross-section illustration of Fig. 2, traction loop be intended to this diagram traction loop hold backboard 5 and on bottom rail 18a, b, and be tensioned to the rubber roll 4 that is installed in back rest 1 top and on the reel 10 of the volume drawstring on the back rest bottom rail 14.

Fig. 3, special-purpose connector schematic diagram 1-movable back top place the sliding shoe 4-of two V guide rails to roll up the drawstring hole with traction belt fixed head 2-fixing threaded hole 3-

The specific embodiment:

Be that example is illustrated with the cover system in the double bed in conjunction with the accompanying drawings now.

In accompanying drawing 1, show: back rest (1) be by about the basic framework (should there be a up-and-down rod backrest center at double bed) that constitutes of two montants and backboard and some crosspieces, there is paired rubber roller axle bed (17) upper edge that on its top is backboard (5), and a rubber roll (4) is installed between a pair of axle bed; Be embedded with the sliding rail of two parallel vertical two V guide rails (6) as the sliding shoe (Fig. 3,3) on the connector (19) on movable back (2a) top in the front of backboard (5).Upper and lower side in two V guide rail (6) grooves is separately installed with stop switch and following stop switch, is respectively applied for the two-way power supply of control reversing dc motor (12).The waist mid-point of two vertical edge frames of movable back (2a) is supported by an end of movable supporting (7), movable supporting (7) other end is supported on the position of going up slightly the positive root foot position of backboard (5) (horizontal plane of this fulcrum is actual will consider to use the mattress of different-thickness when producing the time should slightly exceed several centimetres than the face of mattress), and these two fulcrums all are connection.One end of the back side on the top of movable back (2a) and traction belt (3) is by special-purpose connector (19) strong bonded, and two sliding shoes (Fig. 3,3) on the special-purpose connector (19) place two two V guide rails (6) respectively.Traction belt (3) is pasting the top of tractive movable back (2a) that face up of backboard (5), and the back side along back rest is descending again after rubber roll (4) is located to hold rubber roll (4) from the top for traction belt (3).At this face, the other end cross-peen crimping of traction belt (3), penetrate flat steel bar in the crimping, article two, pass through flat steel bar tractive traction belt (3) downward vertically about parallel back rest back side volume drawstring (9b) divides, the lower end of this two silver laps drawstring is to draw the axle center of dish and be tensioned to volume to the volume corresponding with it by the counter clockwise direction volume to draw on the dish.Front in backboard (5), two back rests positive volume drawstrings (9a) are arranged by the tractive traction belt (3) downward vertically of the volume drawstring hole (Fig. 3,4) on the special-purpose connector (19), the lower end of these two volume drawstrings is rolled up in the direction of the clock to draw the axle center of dish and be tensioned to volume to corresponding volume and is drawn on the dish.The volume of two the positive volume of back rest drawstrings draws the volume of dish and two back rest back side volume drawstrings to draw the both sides that are fixed on same worm-wheel shaft (20) of dish branch left-right symmetry.Worm-wheel shaft (20) is fixed on the back rest bottom rail (14) by worm gear axle bed (11).Worm and worm gear (13) is positioned at the center of worm-wheel shaft (20), and worm screw is connected in the rotor of reversing dc motor (12), and reversing dc motor (12) support is fixed on the back rest bottom rail (14).Manipulation of switches is arranged on the side of the outer inferior horn of movable back (2).

Above-mentioned traction belt (3) should be selected the high-strength complex crossed belt of wire-core for use, volume drawstring (9a and 9b) also should select high-intensity inductility can the synthetic fibers belt, as car belt etc.The length of the width of the width of traction belt (3), movable back (2) and rubber roll (4) should be consistent.The clear length of traction belt (3) should be slightly larger than (not comprising and the bonding part on movable back top and the crimping of the other end) height and covering rubber roll (4) 3/4ths girth sums of movable back (2); The length of used volume drawstring (9a and 9b) all should be identical, and its rolling or the clear length of emitting only should equate with the stroke that move on movable back (2a) top; It all is identical that volume draws the diameter of dish (10), and the diameter of worm gear should be greater than the diameter of reel; The length of movable supporting (7) is 1/2nd of movable back (2a) height.

Operation principle: when the reduction instruction button that continues to press on the manipulation of switches, reversing dc motor clockwise rotates, the worm drive worm gear slowly runs in the direction of the clock, the reel that worm-wheel shaft drives on the same axle slowly rotates, at the volume drawstring in back rest front and when constantly shortening by corresponding reel rolling, the volume drawstring at the back rest back side lengthens synchronously by coiling constantly accordingly, so the pulling traction belt drives rubber roll and moves in the direction of the clock, therefore, site on the traction loop in back rest front moves down, the top that is attached to the movable back on the traction loop is moved downwards thereupon, because the effect of movable supporting makes the change that movable back can only the run-off the straight degree, when it tilts to the appropriate location, unclamp and reduce the instruction button, motor quits work, the gradient of movable back no longer changes, and just can use this moment.If continuing to pin to reduce instructs button not loose one's grip, when the movable back continuous service near horizontal level the time, sliding shoe on the special-purpose connector touches the following stop switch of hiding in two V guide rails, this road power supply is cut off, the reversing dc motor rotor stops to clockwise rotate, moving down automatically of movable back top stops, and movable back changes with regard to being near the position of level no longer.This moment is when instructing button by raising, another road power supply is opened, the rotor of reversing dc motor is by counterclockwise rotating, the worm drive worm gear is by counterclockwise rotating, all that are taken place are all opposite with aforementioned activities, the top of movable back is moved up, and movable back is changed to vertical position, position by level.If continue to pin the instruction button that raises, when movable back runs near the upright position gradually, when above-mentioned sliding shoe touches the last stop switch of hiding in two V guide rails top, this road power supply also is cut off, reversing dc motor has also stopped backward rotation, movable back just has been parked in subvertical position, when also having only this moment by reduction instruction button new round action could take place.As long as in the interval of the sliding shoe of the movable back top connector upper and lower stop switch in not touching two V guide rails, the two-way power supply can arbitrarily be connected, can in being no more than 0-90 ° scope, carry out step-less adjustment arbitrarily to the gradient of movable back.

Claims (5)

1, a kind of movable back and actuating unit thereof comprise a secondary back rest and are installed in the movable back on this back rest and draw the traction loop of this movable back and drive the actuating unit of this traction loop.It is characterized in that at the backrest that a secondary or secondary above activity that can electricity consumption flowing mode adjusting gradient is installed on bed or the original backrest of chaise longue, the top of this backrest is drawn by the traction loop that is stretched on original backrest, can reach the purpose of regulating the movable back gradient by driving this traction loop.

2, back rest according to claim 1 is the upright backrest (frame) of a secondary bed head frame or a secondary chaise longue, it is characterized in that rubber roll being installed on the top of this back rest, be fixed with worm-wheel shaft on the bottom rail of back rest, be inlaid with to this left and right sides symmetry and somely can draw dish with this volume that rotates synchronously.

3, according to the described traction loop of claim 1 hold on the described back rest backboard and fixedly backboard last bottom rail and be tensioned to rubber roll and volume draws on the dish.Two groups of volume drawstrings at one section traction belt of this bail route and tractive traction belt two ends are formed, wherein traction belt is stretched on the rubber roll, one group of volume drawstring wherein is at the vertical tractive traction belt of facing down of back rest, and its lower end is rolled up the axle center and the tensioning of drawing dish to above-mentioned corresponding volume in the direction of the clock; Another group volume drawstring wherein is tractive traction belt downward vertically at the back side of back rest, axle center from volume counterclockwise to above-mentioned corresponding volume and tensioning that its lower end is drawn dish by.

4, be positioned at the front of back rest according to the described movable back of claim 1, its top is attached on the specific site of above-mentioned traction loop by special-purpose connector; The moving connection takes place by the root of the backboard on movable supporting and the back rest in the waist of movable back; The top of movable back can move up and down with the reciprocating motion of traction loop, and the gradient of movable back is changed.

5, comprise that according to the described actuating unit of claim 1 cover drives the worm and worm gear of aforementioned worm-wheel shaft and the reversing dc motor that drives this worm and worm gear.Described worm and worm gear both can drive worm-wheel shaft and drive volume on this and draw dish to rotate synchronously, can draw volume again and fold positioning action, volume draws dish by the volume drawstring traction loop to be risen again and drives and positioning action, finally displacement and positioning action are played in the top that is attached to the movable back on this traction loop, thereby reach the purpose of the gradient of regulating movable back.

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