Cupboard with up-down louvered door and balance system

Abstract

A cupboard has an up-down louvered door. Wherein the door comprises a plurality of louvers, and a lift rack in which the louvers are configured. When people need to open the door, the lift rack lifts and folds up, causing the louvers to fold up, and thus the door is opened; and when people need to close the door, the lift rack descends and extends, causing the louvers to extend, and thus the door is closed. The door can open adequately so as to facilitate taking out/putting in articles. No more space is occupied while opening the door, and the door is safe when closing. A small driving force can open/close the door, and the cupboard features easy operation, long lifetime, low cost and good stability.

Claims

1. A cupboard with an up-down louvered door, comprising: a cupboard body, a door configured in the body; the door having a plurality of louvers, and a lift rack in which the louvers are mounted; wherein when opening the door, the lift rack lifts and folds up, causing the louvers to fold up, and the door is open; wherein when closing the door, the lift rack descends and extends, causing the louvers to extend, and the door is closed; the lift rack comprising a plurality of first lift units, and a plurality of second lift units in which each is connected to two adjacent first lift units; the louvers being connected to the first lift units, and each louver being secured to each corresponding first lift unit; each of the first lift units comprising a first connective element securing to the louvers and a second connective element hinged to the first connective element; and each of the second lift units comprising a third connective element hinged to the first connective element and a fourth connective element hinged to the second connective element; both the third connective element and the fourth connective element being hinged to each other.

2. The cupboard of claim 1 wherein a guide protrusion is set up on the first connective element; a guideway is configured in the body, for installing the lift rack therein; and a guide groove is configured in the guideway, for restricting the guide protrusion to move therein.

3. The cupboard of claim 2 wherein a mounting slot is configured at a left board of the body, and another mounting slot is configured at a right board of the body.

4. The cupboard of claim 1 wherein the cupboard includes a balance system comprising a transmission shaft, a first pulley on the transmission shaft, and a balance component; the first pulley is connected to a belt, one end of the belt is secured on the first pulley, and the other end of the belt is connected to the lift rack; the balance component comprises a balancing member, a balancing belt and a second pulley configured at the transmission shaft; one end of the balancing belt is connected to the second pulley, and the other end of the balancing belt is connected to the balancing member, such that the balancing member can be hung on the second pulley; and the first pulley and the second pulley rotate synchronously, and the belt and the balancing belt are wound inversely.

5. The cupboard of claim 4 wherein the balance system includes a motor transmission apparatus, comprising a motor, a first gear coaxially connected to the motor, and a second gear secured to the transmission shaft; the first gear engages with the second gear.

6. The cupboard of claim 5 wherein an electric/manual switch is configured on the motor, for enabling the first gear and the second gear to be disengaged/engaged.

7. The cupboard of claim 6 wherein the second gear is arranged at a center of the transmission shaft.

8. The cupboard of claim 4 wherein the cupboard comprises a plurality of regulating wheels for tightening/releasing the belt, and the regulating wheels are configured at the left and right boards.

9. A cupboard, comprising; a box with an open front; a door mounted on the box for movement between a raised open position and a lowered closed position; the door having a plurality of louvers; a pair of racks adjacent opposite ends of the louvers to support the louvers; a pulley system mounted to the box and to the racks; a weight connected to the pulley system to counter-balance the door; the pulley system including a shaft driven by a motor, a pair of door pullets mounted adjacent opposite ends of the shaft, a pair of weight pulleys mounted adjacent opposite ends of the shaft, a pair of door belts extending between the racks and the door pulleys and a pair of weight belts extending between the weight and the weight pulley; and the door belts wrapping around the door pulleys in a first direction and the weight belts wrapping around the weight pulleys in a second direction opposite the first direction.

10. The cupboard of claim 9 wherein the motor is a reversible motor connected to the pulley system to move the door between the open and closed positions.

11. The cupboard of claim 9 wherein each rack has a plurality of fingers, and each finger is attached to one end of one of the louvers.

12. The cupboard of claim 11 wherein each rack includes a scissors jack.

13. The cupboard of claim 9 wherein the motor has a drive gear and the pulley system has a drive gear in mesh with the drive gear.

14. The cupboard of claim 9 further comprises a track system to guide movement of the door.

15. The cupboard of claim 14 wherein the box includes opposite side walls, and the track system includes a channel in each sidewall and a protrusion on each rack received in the channel.

16. A cupboard with an up-down louvered door, comprising: a cupboard body, with a door configured in the body; the door having a plurality of louvers, and a lift rack in which the louvers are mounted; wherein when opening the door, the lift rack lifts and folds up, causing the louvers to fold up, and the door is open; wherein when closing the door, the lift rack descends and extends, causing the louvers to extend, and the door is closed; the cupboard including a balance system comprising a transmission shaft, a first pulley on the transmission shaft, and a balance component; the first pulley being connected to a belt, one end of the belt being secured on the first pulley, and the other end of the belt being connected to the lift rack; the balance component comprising a balancing member, a balancing belt and a second pulley configured at the transmission shaft; one end of the balancing belt being connected to the second pulley, and the other end of the balancing belt being connected to the balancing member, such that the balancing member can be hung on the second pulley; and the first pulley and the second pulley rotate synchronously, and the belt and the balancing belt being wound inversely.

17. The cupboard on claim 16 wherein the lift rack comprising a plurality of first lift units, and a plurality of second lift units in which each is connected to two adjacent first lift units; and the louvers being connected to the first lift units, and each louver being secured to each corresponding first lift unit.

18. The cupboard of claim 17 wherein each of the first lift units comprising a first connective element securing to the louvers, and a second connective element hinged to the first connective element; and each of the second lift units comprising a third connective element hinged to the first connective element and a fourth connective element hinged to the second connective element; both the third connective element and the fourth connective element being hinged to each other.

19. The cupboard of claim 18 wherein a guide protrusion is set up on the first connective element; a guideway is configured in the body, for installing the lift rack therein; and a guide groove is configured in the guideway, for restricting the guide protrusion to move therein.

20. The cupboard claim 19 wherein a mounting slot is configured at a left board of the body, and another mounting slot is configured at a right board of the body.

21. The cupboard of claim 20 wherein the cupboard comprises a plurality of regulating wheels for tightening/releasing the belt, and the regulating wheels are configured at the left and right boards.

22. The cupboard of claim 16 wherein the balance system includes an motor transmission apparatus, comprising a motor, a first gear coaxially connected to the motor, and a second gear secured to the transmission shaft; the first gear engages with the second gear.

23. The cupboard of claim 22 wherein an electric/manual switch is configured on the motor, for enabling the first gear and the second gear to be disengaged/engaged.

24. The cupboard of claim 23 wherein the second gear is arranged at a center of the transmission shaft.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural schematic view of a cupboard according to the present invention, with the door closed;

(2) FIG. 2 is a structural schematic view of a cupboard according to the present invention, with the door partially opened;

(3) FIG. 3 is a structural schematic view of a cupboard according to the present invention, with the door opened fully;

(4) FIG. 4 is an exploded view of an embodiment of the cupboard, with the door partially opened;

(5) FIG. 5 is a structural schematic view showing the connection between lift racks and a balance system for the cupboard shown in FIG. 4;

(6) FIG. 6 is a structural schematic view of one of the lift racks;

(7) FIG. 7 is a structural schematic view of a left/right side board of the cupboard;

(8) FIG. 8 is an enlarged view of the portion 8-8 in FIG. 7;

(9) FIG. 9 is a structural schematic view showing a guideway for the lift rack;

(10) FIG. 10 is an enlarged view of the portion 10-10 in FIG. 9;

(11) FIG. 11 is an exploded view of an alternative embodiment of a cupboard according to the present invention;

(12) FIG. 12 is a structural view showing the connection between lift racks and a balance system for the cupboard shown in FIG. 11.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(13) The present invention will be described hereinafter in details with reference to the FIGS. 1-12.

Embodiment 1

(14) A cupboard with up-down louvered door is shown in FIGS. 1-12.

(15) The cupboard with up-down louvered door comprises a cupboard body or box 100 with an open front, a door 200 on the body 100 movable between a raised open position and a lowered closed position, and a handle 201 mounted on the door 200.

(16) The door 200 adopts a lift louvered mechanism, comprising a plurality of louvers 202, a pair of lift racks 300, and a guideway 400 for each lift rack 300.

(17) Each of the lift racks 300 comprises a plurality of first lift units 310, and a plurality of second lift units 320 in which each second lift unit 320 is connected to two adjacent first lift units 310. Each louver 202 is secured to each corresponding first lift unit 310.

(18) Each first lift unit 310 comprises a first connective element or finger 311 securing to the louver 202, and a second connective element 312 hinged to the first connective element 311. Each second lift unit 320 comprises a third connective element 321 hinged to the first connective element 311, and a fourth connective element 322 hinged to the second connective element 312. Both the third connective element 321 and the fourth connective element 322 are hinged to each other. Thus, the elements 311, 312, 321, 322 form a scissor jack type assembly.

(19) As shown in FIGS. 1-4, the cupboard has a door containing multiple louvers 202 which are secured onto the first lift units, 310 respectively, by any convenient means such as a strong adhesive, snap-fitting or port connection or the like. More particularly, each louver 202 is secured onto each corresponding first connective element 311 such that the louvers 202 can be mounted to the lift racks 300.

(20) The body 100 consists of a top board 101, a bottom board 102, a left board 103, a right board 104 and a rear board 105. As shown in FIGS. 7-9, a mounting slot 1031 is configured at the left board 103, and a mounting slot 1041 is configured at the right board 104. Two guideways 400 are mounted inside the mounting slots 1031 and 1041, respectively, with each lift rack 300 connected to each guideway 400.

(21) As shown in FIGS. 6 and 10, a guide protrusion 330 extends from the first connective element 311, and a guide groove 401 is provided in the guideway 400. The guide protrusion 330 can only be moved in the guideway 400 such that the lift rack 300 can lift and fold up, or, descend and extend, along the guide groove 401.

(22) When people need to open the door 200, the lift racks 300 lift and fold up, causing the louvers 202 to fold up, the door is thus open.

(23) When people need to close the door 200, the lift racks 300 descend and extend, causing the louvers 202 to extend, the door is thus closed.

(24) Therefore, for the cupboard with up-down louvered door in the present invention, the door can open adequately so as to facilitate taking out/putting in articles since the lift racks lift and fold up, causing the louvers to fold up. In addition, no more space is occupied while opening the door, and it would be safe while closing the door.

Embodiment 2

(25) In an alternative embodiment of the invention shown in FIGS. 4-5, the cupboard also includes a balance system 500 comprising a transmission shaft 501, a first pair of pulleys 502 on the transmission shaft 501, and a weight or balance component.

(26) The first pair of pulleys 502 are connected to a pair of rack belts 503. One end of each rack belt 503 is secured to each pulley 502, and the other end of each rack belt 503 is connected to the lift racks 300, specifically to the second connective element 312 which is located at a lowest end of the lift racks 300, such that the door 200 is connected to the rack belts 503, and provides the rack belts 503 with a pulling force due to the weight of the door 200.

(27) The balance component comprises a balancing member or weight 506, a pair of balancing belts 505 and a second pair of pulleys 504 on the transmission shaft 501. One end of each of the balancing belts 505 are connected to the second pulleys 504, and the other end of each of the balancing belts 505 is connected to the balancing member 506, such that the balancing member 506 can be hung on the second pulleys 504, and provides the balancing belts 505 with a pulling force due to the weight of the balancing member 506. The first pulleys 502, the second pulleys 504 and the transmission shaft 501 can rotate synchronously. The rack belts 503 and the balancing belts 505 are wound inversely on the first pulleys 502 and the second pulleys 504, respectively.

(28) The pulling force from the door 200 corresponds to the pulling force from the balancing member 506 so as to make the balance system in a balanced state.

(29) Further the cupboard comprises a plurality of regulating wheels 600 for tightening/releasing the belts 503, and the regulating wheels 600 are configured at the left and right boards.

(30) The two second pulleys 504 are configured in bilateral symmetry at both sides of a center of the transmission shaft 501, and the elongated balancing member 506 is a homogeneous substance. Preferably the transmission shaft 501 and the elongated balancing member 506 have a same orientation, and both balancing belts 505 are mounted at both ends of the elongated balancing member 506 where two mounting points are in bilateral symmetry such that the force borne by both second pulleys 504 will be substantially identical.

(31) The pulling force from the door 200 to the belts 503 corresponds to the pulling force from the balancing member 506 to the balancing belts 505 so as to make the balance system in a balanced state. A small driving force can make the system imbalance and facilitate the door opening/closing.

(32) The present invention features simple structure, low cost, good stability and long lifetime.

Embodiment 3

(33) In another alternative embodiment shown in FIGS. 11-12, the cupboard also includes a motor transmission apparatus which is mounted in a mounting plate 700 located beneath the top board 101. A baffle plate 800 is also set up in the body 100.

(34) The motor transmission apparatus comprises a motor 507, a first gear 508 coaxially connected to the motor 507, and a second gear 509 secured to the transmission shaft 501. The first gear 508 engages with the second gear 509. Preferably the second gear 509 is arranged at the center of the transmission shaft 501.

(35) An electric/manual switch 510 is operatively connected to the motor 507, for enabling the first gear 508 and the second gear 509 to be disengaged/engaged. When the first gear 508 and the second gear 509 are disengaged, the balance system will be in a manual state, wherein a small driving force to the handle, places the system in imbalance to open/close the door.

(36) When the first gear 508 and the second gear 509 are engaged and the motor 507 is powered up to rotate, the transmission shaft 501 is rotated. The motor generates a small driving force which can make the system imbalance and open/close the door. Since only a small power output is required the motor 507 costs is minimized. The present invention features good stability and long lifetime due to a balanced configuration.

(37) If no balancing member 506 is present, there is no pulling force from the balancing member 506 to balance the weight of the door 200. In this circumstance, when people need to open/close the door, the motor will supply a stronger pulling force with more motor power. In addition, a motor controller may be required to control the motor's output, making the door open/close smoothly, and it may require a complex transmission mechanism with a higher cost.

(38) It is understood that the belts may also be any type of tension member, such as a rope, cord, chain, or cable.

(39) The embodiments described hereinbefore is merely preferred embodiments of the present invention and not for purposes of any restrictions or limitations to the invention. It will be apparent that any non-substantive, obvious alterations or improvements by the technician of this technical field according to the present invention may be incorporated into ambit of claims of the present invention.