阅读说明：本技术 一种用于橱柜门的可左右滑动和向上打开的装置 (Device capable of sliding left and right and opening upwards for cabinet door ) 是由 陈国文 于 2021-08-20 设计创作，主要内容包括：本发明涉及橱柜技术领域,且公开了一种用于橱柜门的可左右滑动和向上打开的装置,包括滑道框,所述滑道框的内部滑动连接有滑动门,所述滑动门的内部设置有配合槽,所述滑道框的表面滑动连接有移动锁钩,所述移动锁钩的底部设置有滑动槽,所述滑动槽的内部滑动连接有限位块。该用于橱柜门的可左右滑动和向上打开的装置,通过滑道框、滑动门、配合槽、移动锁钩、滑动槽、限位块、配合弹簧、连杆、触动杆、突出块、关闭杆和触动按钮等的配合使用,从而达到了橱柜的两扇门能左右推拉打开的同时,还能在需要对时候将两扇门同时向上打开,使得橱柜完全打开,不仅方便存储较大的东西和翻找东西,还便于橱柜的清理通风的效果。(The invention relates to the technical field of cabinets and discloses a device capable of sliding left and right and opening upwards for a cabinet door. This a but device that is used for cabinet door horizontal slip and upwards opens, through the slide frame, the sliding door, the cooperation groove, the removal latch hook, the sliding tray, the stopper, the cooperation spring, the connecting rod, the trip lever, outstanding piece, close the cooperation use of pole and touch button etc to when two doors of having reached the cupboard can left and right sides push-and-pull and open, can also upwards open two doors simultaneously when needs are right, make the cupboard open completely, not only conveniently save great east and west and look for the thing with overturning, the clearance ventilation's of still being convenient for cupboard effect.)

1. A device for sliding side to side and opening upwards for cabinet doors, comprising a slideway frame (1), characterized in that: the slide rail is characterized in that a sliding door (2) is connected to the inside of the slide rail frame (1) in a sliding manner, a matching groove (3) is formed in the inside of the sliding door (2), a movable lock hook (4) is connected to the surface of the slide rail frame (1) in a sliding manner, a sliding groove (5) is formed in the bottom of the movable lock hook (4), a limiting block (6) is connected to the inside of the sliding groove (5) in a sliding manner, a matching spring (7) is fixedly connected to the surface of the limiting block (6), a connecting rod (8) is hinged to one end of the bottom of the movable lock hook (4), a touch rod (9) is rotatably connected to the lower end of the connecting rod (8), a protruding block (10) is fixedly connected to the right side of the slide rail frame (1) in a surface manner, a rotating rod (11) is hinged to the surface of the protruding block (10), a limiting wheel (12) is rotatably connected to the upper end of the rotating rod (11), and a fixing block (13) is rotatably connected to the surface of the limiting wheel (12), the left side of the limiting wheel (12) is provided with a switch device (14), the inside of the switch device (14) is connected with a movable groove plate (15) in a sliding mode, the top of the movable groove plate (15) is clamped with a touch pin rod (16), the lower side of the touch pin rod (16) is provided with an opening rod (17), the lower end of the opening rod (17) is provided with a closing rod (18), and the right side of the closing rod (18) is provided with a touch button (19).

2. A device for sliding side to side and opening upwards for cabinet doors, according to claim 1, characterized in that: two parallel sliding grooves are formed in the slide rail frame (1), the number of the sliding doors (2) is two, the two sliding doors (2) are respectively in sliding connection with the two sliding grooves of the slide rail frame (1), the left end of the sliding door (2) on the upper side is in contact with the left side surface of the slide rail frame (1), the right end of the sliding door (2) on the lower side is opposite to the left side of the sliding door (2) on the lower side, and the right end of the sliding door (2) on the lower side is in contact with the right side surface of the slide rail frame (1); the three matching grooves (3) are arranged in the center of the lower side surface of the slide rail frame (1), the other two matching grooves are arranged at the positions, right opposite to the two sliding doors (2), of the two sliding doors respectively, and the three matching grooves (3) are arranged on the same straight line.

3. A device for sliding side to side and opening upwards for cabinet doors, according to claim 1, characterized in that: the two movable lock hooks (4), the two sliding grooves (5) and the two limiting blocks (6) are respectively arranged and are in a group, and the two groups are mirror symmetry relative to the center of the slide way frame (1); a set of well sliding tray (5) set up in the bottom of moving latch hook (4) and parallel with slide frame (1), and the inside and stopper (6) sliding connection of sliding tray (5), stopper (6) are fixed, and the one end that slide frame (1) center was kept away from in stopper (6) and the one end fixed connection of a cooperation spring (7), the other end of cooperation spring (7) and the one end fixed connection of keeping away from slide frame (1) center of sliding tray (5).

4. A device for sliding side to side and opening upwards for cabinet doors, according to claim 1, characterized in that: connecting rod (8) have two, and the one end of two connecting rods (8) is articulated with the one end that is close to of two removal latch hooks (4) respectively, and the other end articulates together and is articulated with touch bar (9), and touch bar (9) are perpendicular with slide frame (1), and upper end and cooperation groove (3) cooperation, and the removal orbit is through cooperation groove (3).

5. A device for sliding side to side and opening upwards for cabinet doors, according to claim 1, characterized in that: two rotating rods (11) are arranged, one ends of the two rotating rods (11) are respectively hinged with the protruding block (10), the other ends of the two rotating rods are respectively hinged with the fixed block (13), and the fixed block (13) is fixed; and the upper end of the upper rotating rod (11) is rotationally connected with the limiting wheel (12), and the limiting wheel (12) is rotationally connected with the fixed block (13) and is connected with an external motor.

6. A device for sliding side to side and opening upwards for cabinet doors, according to claim 1, characterized in that: the switch device (14) is fixedly connected with the fixed block (13), the movable groove plate (15) is arranged in the switch device (14) and is in sliding connection with the switch device in the vertical direction, the lower end of the movable groove plate (15) is fixedly connected with the upper end of a matching spring (7), the lower end of the matching spring (7) is fixedly connected with the switch device (14), and three grooves are formed in the movable groove plate (15) and are respectively matched with a touch pin rod (16), an opening rod (17) and a closing rod (18).

7. A device for sliding side to side and opening upwards for cabinet doors, according to claim 1, characterized in that: the touch pin rod (16) is vertical to the moving groove plate (15) and is in sliding connection with the switch device (14), the surface of the touch pin rod is provided with a protrusion matched with the groove at the uppermost side of the moving groove plate (15), the right end of the touch pin rod is inserted into the limiting wheel (12), the surface of the touch pin rod is provided with a matching spring (7), and the left end of the matching spring (7) is fixedly connected with the right end of the matching spring (7) and is fixedly connected with the switch device (14); the opening rod (17) is arranged on the lower side of the touch pin rod (16) and is vertical to the movable groove plate (15) and is in sliding connection with the switch device (14), a protrusion is arranged on the surface of the opening rod and is matched with the groove in the middle of the movable groove plate (15), a matching spring (7) is arranged on the surface of the opening rod, and the left end of the matching spring (7) is fixedly connected with the right end of the matching spring which is fixedly connected with the opening rod and is fixedly connected with the switch device (14); the closing rod (18) is arranged on the lower side of the opening rod (17) and is vertical to the movable groove plate (15) and is in sliding connection with the switch device (14), a protrusion is arranged on the surface of the closing rod and is matched with the groove on the lowest side of the movable groove plate (15), a matching spring (7) is arranged on the surface of the closing rod, and the left end of the matching spring (7) is fixedly connected with the right end of the fixed connection of the matching spring and the switch device (14).

8. A device for sliding side to side and opening upwards for cabinet doors, according to claim 1, characterized in that: two touch buttons (19) are respectively arranged on the switch devices (14) right at the right side of the opening rod (17) and the closing rod (18) and are respectively arranged on the moving tracks of the opening rod (17) and the closing rod (18); the touch button (19) opposite to the opening rod (17) is electrically connected with the clockwise rotation circuit of the limiting wheel (12), and the touch button (19) opposite to the closing rod (18) is electrically connected with the anticlockwise rotation circuit of the limiting wheel (12).

Technical Field

The invention relates to the technical field of cabinets, in particular to a device capable of sliding left and right and opening upwards for a cabinet door.

Background

Every family has generally all been placed the cupboard and has been deposited things such as clothing, but current push-and-pull door cupboard is two doors usually, can only open a fan, and the structure of push-and-pull door makes the door can not all open, and this can lead to inconvenient when seeking the thing of cupboard, perhaps great thing can't accomodate into the cupboard, and the door can not open the clearance ventilation etc. that are unfavorable for the cupboard completely.

Disclosure of Invention

Technical problem to be solved

The invention provides a device capable of sliding left and right and opening upwards for a cabinet door, which is used for solving the problems that two doors of a cabinet can be pushed and pulled left and right to open, and can be opened upwards simultaneously when the two doors need to be aligned, so that the cabinet can be opened completely, larger articles can be stored conveniently and found, the cleaning and ventilation of the cabinet are facilitated, the problems that the existing sliding door cabinet is usually two doors, only one door can be opened, the doors cannot be opened completely due to the structure of the sliding door, the article finding in the cabinet is inconvenient, or the larger articles cannot be stored in the cabinet, the doors cannot be opened completely, the cleaning and ventilation of the cabinet are not facilitated, and the like are solved.

(II) technical scheme

In order to realize the purposes that two doors of the cabinet can be opened by being pushed and pulled leftwards and rightwards, and the two doors can be opened upwards simultaneously when needed, so that the cabinet is completely opened, larger articles can be conveniently stored and found, and the cabinet is convenient to clean and ventilate, the invention provides the following technical scheme: a device capable of sliding left and right and opening upwards for a cabinet door comprises a slide way frame, a sliding door is connected inside the slide way frame in a sliding mode, a matching groove is formed inside the sliding door, a moving lock hook is connected on the surface of the slide way frame in a sliding mode, a sliding groove is formed in the bottom of the moving lock hook, a limiting block is connected inside the sliding groove in a sliding mode, a matching spring is fixedly connected on the surface of the limiting block, a connecting rod is hinged to one end of the bottom of the moving lock hook, a touch rod is rotatably connected to the lower end of the connecting rod, a protruding block is fixedly connected to the right side surface of the slide way frame, a rotating rod is hinged to the surface of the protruding block, a limiting wheel is rotatably connected to the upper end of the rotating rod, a fixed block is rotatably connected to the surface of the limiting wheel, a switch device is arranged on the left side of the limiting wheel, and a moving groove plate is connected inside the switch device in a sliding mode, the top of the movable groove plate is clamped with a touch pin rod, the lower side of the touch pin rod is provided with an opening rod, the lower end of the opening rod is provided with a closing rod, and the right side of the closing rod is provided with a touch button.

Preferably, two parallel sliding chutes are arranged inside the slide way frame, two sliding doors are provided, the two sliding doors are respectively in sliding connection with the two sliding chutes of the slide way frame, wherein the left end of the sliding door at the upper side is in contact with the left side surface of the slide way frame, the right end of the sliding door at the lower side is opposite to the left side of the sliding door at the lower side, and the right end of the sliding door at the lower side is in contact with the right side surface of the slide way frame; the matching grooves are three, one is arranged in the center of the lower side surface of the slide way frame, the other two are respectively arranged at the opposite positions of the two sliding doors, and the three matching grooves are arranged on the same straight line.

Preferably, the number of the movable lock hooks, the number of the sliding grooves and the number of the limiting blocks are two, one of the movable lock hooks, the sliding grooves and the limiting blocks is a group, and the two groups are mirror-symmetrical about the center of the sliding way frame; the sliding groove sets up in a set of bottom and parallel with the slide frame that removes the locking hook, and the inside and the stopper sliding connection of sliding groove, and the stopper is fixed, and the one end that the slide frame center was kept away from to the stopper is fixed with the one end fixed connection of a cooperation spring, and the other end of cooperation spring and the one end fixed connection of keeping away from the slide frame center of sliding groove.

Preferably, the connecting rods have two, and the one end of two connecting rods is articulated with the one end that is close to of two removal latch hooks respectively, and the other end articulates together and is articulated with the touch bar, and the touch bar is perpendicular with the slide frame, and the upper end and cooperation groove cooperation, the removal orbit is through the cooperation groove.

Preferably, the number of the rotating rods is two, one end of each rotating rod is hinged with the protruding block, the other end of each rotating rod is hinged with the fixed block, and the fixed block is fixed; and the upper end of the rotating rod on the upper side is rotatably connected with the limiting wheel, and the limiting wheel fixing block is rotatably connected with an external motor.

Preferably, the switch device is fixedly connected with the fixed block, the movable groove plate is arranged in the switch device and is in sliding connection with the switch device in the vertical direction, the lower end of the movable groove plate is fixedly connected with the upper end of a matching spring, the lower end of the matching spring is fixedly connected with the switch device, and three grooves are formed in the movable groove plate and are respectively matched with the touch pin rod, the opening rod and the closing rod.

Preferably, the touch pin rod is perpendicular to the movable slotted plate and is in sliding connection with the switch device, a protrusion is arranged on the surface of the touch pin rod and is matched with the uppermost slot of the movable slotted plate, the right end of the touch pin rod is inserted into the limiting wheel, a matching spring is arranged on the surface of the touch pin rod, and the left end of the matching spring is fixedly connected with the right end of the matching spring and is fixedly connected with the switch device; the opening rod is arranged at the lower side of the touch pin rod, is vertical to the movable groove plate and is in sliding connection with the switch device, a protrusion is arranged on the surface of the opening rod and is matched with the groove in the middle of the movable groove plate, a matching spring is arranged on the surface of the opening rod, and the left end of the matching spring is fixedly connected with the right end of the matching spring and is fixedly connected with the switch device; the closing rod is arranged on the lower side of the opening rod, is vertical to the movable groove plate and is in sliding connection with the switch device, a protrusion is arranged on the surface of the closing rod and is matched with the groove on the lowest side of the movable groove plate, a matching spring is arranged on the surface of the closing rod, and the left end of the matching spring is fixedly connected with the right end of the fixed connection of the left end of the matching spring and the right end of the fixed connection of the matching spring and the switch device.

Preferably, the number of the touch buttons is two, the two touch buttons are respectively arranged on the switching devices right at the right sides of the opening rod and the closing rod and are respectively arranged on the moving tracks of the opening rod and the closing rod; the touch button opposite to the opening rod is electrically connected with the clockwise rotation circuit of the limiting wheel, and the touch button opposite to the closing rod is electrically connected with the anticlockwise rotation circuit of the limiting wheel.

(III) advantageous effects

Compared with the prior art, the invention provides a device capable of sliding left and right and opening upwards for a cabinet door, which has the following beneficial effects:

this a but device that is used for cabinet door horizontal slip and upwards opens, through the slide frame, the sliding door, the cooperation groove, the removal latch hook, the sliding tray, the stopper, the cooperation spring, the connecting rod, the trip bar, outstanding piece, the dwang, the restriction wheel, the fixed block, switching device, the removal frid, touch the pin lever, the opening lever, close the pole and touch the cooperation of button and use, thereby reached two doors of cupboard and can left and right sides push-and-pull open the while, can also upwards open two doors simultaneously when needs are right, make the cupboard open completely, not only make things convenient for the great east and west of storage and turn over and look for the thing, still be convenient for the clearance ventilation effect of cupboard.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of the switchgear of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic top view of a portion of the movable lock hook of the present invention;

fig. 4 is a schematic view of the slide frame of fig. 1 according to the present invention opened upward.

In the figure: 1. a slideway frame; 2. a sliding door; 3. a mating groove; 4. moving the latch hook; 5. a sliding groove; 6. a limiting block; 7. a mating spring; 8. a connecting rod; 9. a touch rod is touched; 10. a protruding block; 11. rotating the rod; 12. a limiting wheel; 13. a fixed block; 14. a switching device; 15. moving the slot plate; 16. a touch pin lever; 17. an opening lever; 18. a closing lever; 19. the button is activated.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a device for sliding left and right and opening upwards for a cabinet door comprises a sliding track frame 1, a sliding door 2 is slidably connected inside the sliding track frame 1, a matching groove 3 is arranged inside the sliding door 2, a moving latch hook 4 is slidably connected to the surface of the sliding track frame 1, a sliding groove 5 is arranged at the bottom of the moving latch hook 4, a limiting block 6 is slidably connected inside the sliding groove 5, a matching spring 7 is fixedly connected to the surface of the limiting block 6, a connecting rod 8 is hinged to one end of the bottom of the moving latch hook 4, a touch rod 9 is rotatably connected to the lower end of the connecting rod 8, a protruding block 10 is fixedly connected to the right side surface of the sliding track frame 1, a rotating rod 11 is hinged to the surface of the protruding block 10, a limiting wheel 12 is rotatably connected to the upper end of the rotating rod 11, a fixed block 13 is rotatably connected to the surface of the limiting wheel 12, and a switch device 14 is arranged at the left side of the limiting wheel 12, a moving groove plate 15 is slidably connected inside the switch device 14, a touch pin 16 is clamped at the top of the moving groove plate 15, an opening rod 17 is arranged at the lower side of the touch pin 16, a closing rod 18 is arranged at the lower end of the opening rod 17, and a touch button 19 is arranged at the right side of the closing rod 18.

Two parallel sliding grooves are formed in the slide rail frame 1, two sliding doors 2 are arranged, the two sliding doors 2 are respectively in sliding connection with the two sliding grooves of the slide rail frame 1, wherein the left end of the sliding door 2 on the upper side is in contact with the left side surface of the slide rail frame 1, the right end of the sliding door 2 on the lower side is opposite to the left side of the sliding door 2 on the lower side, and the right end of the sliding door 2 on the lower side is in contact with the right side surface of the slide rail frame 1; the number of the fitting grooves 3 is three, one is provided at the center of the lower side surface of the chute frame 1, the other two are provided at the positions facing the two sliding doors 2, respectively, and the three fitting grooves 3 are in a straight line.

The number of the movable lock hooks 4, the sliding grooves 5 and the limiting blocks 6 is two, one of the movable lock hooks, the sliding grooves and the limiting blocks is a group, and the two groups are symmetrical about the central mirror surface of the slide way frame 1; a set of well sliding tray 5 sets up in the bottom of removing lock hook 4 and parallel with slide frame 1, and sliding tray 5's inside and stopper 6 sliding connection, and stopper 6 is fixed, and stopper 6 keeps away from the one end at slide frame 1 center and the one end fixed connection of a cooperation spring 7, and the other end of cooperation spring 7 and sliding tray 5 keep away from the one end fixed connection at slide frame 1 center.

The connecting rods 8 are two, one ends of the two connecting rods 8 are hinged to one ends, close to the two movable lock hooks 4, the other ends of the two connecting rods are hinged to each other and hinged to a touch rod 9, the touch rod 9 is perpendicular to the slide rail frame 1, the upper end of the touch rod is matched with the matching groove 3, and the moving track passes through the matching groove 3.

Two rotating rods 11 are provided, one ends of the two rotating rods 11 are respectively hinged with the protruding block 10, the other ends of the two rotating rods 11 are respectively hinged with the fixed block 13, and the fixed block 13 is fixed; and the upper end of the upper rotating rod 11 is rotatably connected with a limiting wheel 12, and the limiting wheel 12 is rotatably connected with a fixed block 13 and is connected with an external motor.

The switch device 14 is fixedly connected with the fixed block 13, the movable groove plate 15 is arranged in the switch device 14 and is in sliding connection with the switch device in the vertical direction, the lower end of the movable groove plate 15 is fixedly connected with the upper end of a matching spring 7, the lower end of the matching spring 7 is fixedly connected with the switch device 14, and three grooves are formed in the movable groove plate 15 and are respectively matched with a touch pin rod 16, an opening rod 17 and a closing rod 18.

The touch pin rod 16 is vertical to the moving groove plate 15 and is in sliding connection with the switch device 14, a protrusion is arranged on the surface of the touch pin rod and is matched with the groove on the uppermost side of the moving groove plate 15, the right end of the touch pin rod is inserted into the limiting wheel 12, a matching spring 7 is arranged on the surface of the touch pin rod, and the left end of the matching spring 7 and the right end fixedly connected with the matching spring are fixedly connected with the switch device 14; the opening rod 17 is arranged at the lower side of the touch pin rod 16, is vertical to the movable groove plate 15 and is in sliding connection with the switch device 14, a bulge is arranged on the surface of the opening rod to be matched with the groove in the middle of the movable groove plate 15, a matching spring 7 is arranged on the surface of the opening rod, and the left end and the right end of the matching spring 7 which are fixedly connected with the opening rod are fixedly connected with the switch device 14; the closing rod 18 is arranged at the lower side of the opening rod 17, is vertical to the moving groove plate 15, is in sliding connection with the switch device 14, is provided with a bulge on the surface, is matched with the groove at the lowest side of the moving groove plate 15, is provided with a matching spring 7 on the surface, and is fixedly connected with the switch device 14 at the left end and the right end of the matching spring 7.

Two touch buttons 19 are respectively arranged on the switching devices 14 right at the right side of the opening rod 17 and the closing rod 18 and on the moving tracks of the opening rod 17 and the closing rod 18; the trigger button 19 opposite to the opening rod 17 is electrically connected with the clockwise rotation circuit of the limiting wheel 12, and the trigger button 19 opposite to the closing rod 18 is electrically connected with the anticlockwise rotation circuit of the limiting wheel 12.

Procedure and principle of operation the initial condition of the device for sliding left and right and opening upwards for cabinet doors is as claimed and in figures 1-3.

The cabinet door can be opened and closed by directly pushing the sliding doors 2 left and right along the slideway frame 1 at ordinary times, when the two sliding doors 2 are required to be opened upwards and completely, the two sliding doors 2 are closed, and at the moment, the matching grooves 3 on the two sliding doors 2 are aligned with the matching grooves 3 on the slideway frame 1 and the touch rods 9.

Promote touch rod 9, the upper end of touch rod 9 inserts in the cooperation groove 3 on two sliding doors 2 and the slide frame 1, touch rod 9 removes and drives two articulated connecting rods 8 removal with it simultaneously, two connecting rods 8 drive two articulated removal latch hooks 4 with it respectively and keep away from each other, because remove the sliding tray 5 and the stopper 6 sliding connection that set up on the latch hook 4, and the one end of connecting rod 8 and the one end fixed connection of cooperation spring 7 are kept away from to sliding tray 5, the other end and the stopper 6 fixed connection of cooperation spring 7, stopper 6 is fixed motionless, remove latch hook 4 promptly and keep away from each other along stopper 6, and the compression with it respectively fixed connection's cooperation spring 7.

The latch hooks 4 are moved away from each other, i.e. away from the chute frame 1, and cannot be locked, the opening rod 17 is pressed to compress the matching spring 7 fixedly connected with the opening rod, at the same time, the opening rod 17 drives the moving slot plate 15 contacted with the opening rod to move downwards, and compresses the matching spring 7 fixedly connected with the lower side of the moving slot plate 15, and then the right-side touch button 19 is touched, the trigger button 19 is electrically connected with the limiting wheel 12, the limiting wheel 12 rotates clockwise, meanwhile, because the trigger pin 16 is popped up to the left under the action of the matching spring 7 fixedly connected with the trigger pin when the moving slot plate 15 moves downwards, i.e. the trip pin 16 loses contact with the limiter wheel 12, the limiter wheel 12 is not caught by the trip pin 16, the limiter wheel 12 can rotate, and the moving slot plate 15 is clamped on the opening rod 17 when it returns under the action of the matching spring 7 fixedly connected with the moving slot plate, namely the trigger button 19 on the right side of the opening rod 17 is always triggered.

The limiting wheel 12 rotates clockwise to drive the rotating rod 11 fixedly connected with the rotating rod to rotate, the rotating rod 11 drives the protruding block 10 connected with the rotating rod and the slideway frame 1 fixedly connected with the protruding block 10 to rotate upwards, namely, the two sliding doors 2 are opened upwards, the touch pin rod 16 is pressed when the sliding door is required to stop, the touch pin rod 16 pushes the moving groove plate 15 to move downwards in a similar way, the moving groove plate 15 returns under the action of the matching spring 7 fixedly connected with the moving groove plate and clamps the touch pin rod 16, meanwhile, the right end of the touch pin rod 16 is inserted into the limiting wheel 12 to be clamped, meanwhile, the opening rod 17 pops up when the moving groove plate 15 moves downwards in a similar way, and the limiting wheel 12 stops rotating.

When closing downwards, the closing rod 18 is pressed, and the slide way frame 1 moves downwards to the original position for closing in the same way as before.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.