Drawer opening mechanism

Abstract

The present invention relates to a drawer opening mechanism, which is arranged between a cabinet (1) and a drawer (2) of a disinfection cabinet, and is characterized in that it comprises a screw rod (3) and a guide rod (7) arranged along the drawing direction of the drawer (2) and positioned relative to the side wall of the cabinet (1), a nut (31) and a slide (4) threadedly connected to the screw rod (3); the slide (4) can be slidably arranged on the guide rod (7); the slide (4) is driven to connect the drawer (2); the slide (4) can be slidably connected to the nut (31), and a clutch mechanism (9) for controlling whether the nut (31) and the slide (4) are linked or not is also provided between the nut (31) and the slide (4); a motor (6) is driven to connect the screw rod (3). The manual mode and the automatic mode of the drawer opening mechanism of the present invention can be switched freely, and the structure is compact and can be installed in a narrow space.

Description

Technical Field

[0001] The invention relates to the field of household appliances, and in particular to a drawer opening mechanism of a household appliance. Background Art

[0002] CN201110190394.8 discloses "A screw-driven warehouse door driving device that can be switched to automatic or manual mode", in which the warehouse door body is connected to the sliding box through a connecting rod, the motor is connected to the screw located on the fixing device, the sliding box is connected to the screw, and the electromagnetic suction device arranged on the sliding block controls the electromagnetic suction pressure rod to press down or rise, the lower end of the electromagnetic suction pressure rod is connected to the screw nut that can engage or disengage with the screw, a spring is arranged at the bottom of the screw nut, and a sliding block that cooperates with the screw clearance is also arranged on the sliding box, so that the warehouse door body drives the transmission box to slide on the screw through the connecting rod.

[0003] This patented technology can easily switch between automatic and manual door opening modes, but its structure is bulky and not suitable for small spaces. In particular, if there is a sudden power outage during the automatic program, it cannot be reset. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a drawer opening mechanism which has a compact structure and can be used in a narrow space and can be opened automatically or manually in view of the current status of the prior art.

[0005] Another technical problem to be solved by the present invention is to provide a drawer opening mechanism which has a compact structure, can be used in a small space, can automatically reset when power is restored after a power outage, and is convenient for switching between manual and automatic modes.

[0006] The technical solution adopted by the present invention to solve the above technical problems is as follows: the drawer opening mechanism is arranged between the cabinet body and the drawer of the disinfection cabinet, and is characterized by comprising a screw rod and a guide rod arranged along the drawer pulling direction and positioned relative to the side wall of the cabinet body, and a nut and a slide table threadedly connected to the screw rod;

[0007] The slide can be slidably arranged on the guide rod; the slide is drivingly connected to the drawer;

[0008] The slide is slidably connected to the nut, and a clutch mechanism is provided between the nut and the slide for controlling whether the two are linked or not;

[0009] The motor drives and connects the lead screw.

[0010] There may be a variety of clutch mechanisms that can accomplish the clutch function in the above scheme. Preferably, the clutch mechanism may include an electromagnet, a magnetic member, and an elastic member.

[0011] The nut is provided with a slot, the slide is provided with a receiving slot, one end of the magnetic member is limited in the receiving slot, and the other end can pass through the receiving slot and be inserted into the slot;

[0012] The elastic member is accommodated in the accommodating groove and contacts the magnetic member, so that the magnetic member has a tendency to escape from the slot;

[0013] The electromagnet is connected to the slide and is arranged opposite to the magnetic component; when the electromagnet is energized, it repels the magnetic component.

[0014] Preferably, the magnetic member is an armature.

[0015] Preferably, the electromagnet can be connected to the outer wall of the slide, and a guide shaft is also connected to the electromagnet; correspondingly, a guide groove is provided on the magnetic part; and the guide shaft is slidably accommodated in the guide groove.

[0016] Considering the balance of the force on the drawer and the stability and smoothness of the movement, there can be two screw rods corresponding to each drawer, which are respectively arranged relative to the two opposite inner side walls of the cabinet, and the two ends of the screw rod are respectively rotatably connected to the front support block and the rear support block;

[0017] The two ends of the guide rod are respectively supported and connected to the front support block and the rear support block;

[0018] The front support block and the rear support block are connected to the inner side wall of the cabinet.

[0019] Preferably, a limit switch can be provided to start the motor when the power is restored after a power failure. The limit switch is designed so that the motor is automatically started when the power is restored after a sudden power failure, and the drive nut is reset for subsequent use.

[0020] Furthermore, the limit switch may be arranged on the outer side wall of the nut, and the rear support block may be arranged on the travel path of the nut, and the limit switch may cut off the power supply to the motor and stop the motor when touched by the rear support block.

[0021] Preferably, there are two guide rods, which are respectively arranged in parallel on both sides of the screw rod.

[0022] Preferably, the front support block and / or the rear support block may be connected to a pulley, and the drawer support is arranged on the pulley.

[0023] Furthermore, the front support block and the rear support block may be arranged on a bottom plate, and the bottom plate is connected to the inner side wall of the cabinet.

[0024] The motor and the limit switch are both connected to an electric control system via electrical signals, and the electric control system is arranged on a panel of the disinfection cabinet.

[0025] Compared with the prior art, the drawer opening mechanism provided by the present invention has a compact structure and a small size. It does not require changing the structure of the disinfection cabinet and can be adapted to the original space installation of the disinfection cabinet, and the manual and automatic switching can be free and convenient. In the preferred embodiment, the design of the limit switch of the clutch mechanism can automatically switch to manual mode in the event of a sudden power outage, and automatically reset the nut after the power is restored, which will not affect the opening and closing of the drawer, and thus will not affect the normal use of the disinfection cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A longitudinal cross-sectional view of an embodiment of the present invention in use;

[0027] Figure 2 It is a three-dimensional schematic diagram of the assembly structure of the clutch mechanism in an embodiment of the present invention;

[0028] Figure 3 for Figure 2 Schematic diagram of local decomposition;

[0029] Figure 4 for Figure 2 Longitudinal section view of . DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings.

[0031] like Figures 1 to 4 As shown, the automatic opening and closing drawer mechanism of the disinfection cabinet is arranged between the cabinet body 1 and the drawer 2 of the disinfection cabinet, and comprises:

[0032] The bottom plate 8 comprises two pieces, which are respectively connected to two opposite inner side walls of the cabinet 1 .

[0033] There are two groups of front support blocks 51 and rear support blocks 52, which are arranged on the travel path of the nut 31 and the slide 4, and are both connected to the bottom plate 8. The sides of the two support blocks are connected to the inner wall of the cabinet, wherein the front support block 51 is arranged at the front end of the bottom plate 8, and the rear support block 52 is arranged at the rear end of the bottom plate 8. A connecting hole is arranged in the middle of the front and rear support blocks, and a bearing 53 is arranged in the connecting hole; shaft holes are respectively arranged on both sides of the connecting hole.

[0034] The pulley 54 is connected to the side wall of the front support block 52 to reduce the friction when the drawer moves, so that the drawer can be opened and closed more smoothly. The pulley can also be provided on the rear support block as required.

[0035] There are two screw rods 3, which are respectively arranged corresponding to the two bottom plates 8; the two ends of the screw rod 8 are respectively connected to the two bearings 53 on the front support block 51 and the rear support block 52.

[0036] The nut 31 is threadably sleeved on the screw rod 3 , and a slot 311 is formed on the side wall of the nut 31 .

[0037] There are two groups of guide rods 7, which are respectively arranged corresponding to the two screw rods 3, with two guide rods in each group. The two ends of the guide rods are respectively supported and penetrated into the axial holes on the front and rear support blocks, so that the two guide rods are respectively located on both sides of the corresponding screw rods 3.

[0038] The slide 4 has two pieces, and a slide groove 42 is provided in the middle of the lower surface thereof, and the nut 31 can be slidably accommodated in the slide groove 42; two guide holes 43 are provided on both sides of the slide groove 42, and two guide rods 7 are respectively penetrated in the two guide holes, so that the slide can be slidably limited on the two guide rods 7. A receiving groove 41 is also provided on the side wall of the slide 4, and the receiving groove 41 opens toward the outer side wall of the slide, and a through hole 44 is also provided on the bottom surface of the receiving groove.

[0039] There are two motors 6, which are used to drive the screw rod 3 to rotate, and are connected to the corresponding screw rod 3 through a coupling. In this embodiment, the two motors 6 are connected to the electric control system (not shown in the figure) through electrical signals to facilitate user operation. The electric control system is set on the panel of the disinfection cabinet.

[0040] The limit switch 61 is used to start the motor 6 when power is restored after power failure. It is arranged on the side wall of the nut 31 corresponding to the rear support block 52 and is in a normally open state. When the limit switch 61 touches the rear support block, the motor stops rotating.

[0041] The clutch mechanism 9 is arranged between the slide 4 and the nut 31 to control whether the two are linked or not, and comprises an electromagnet 91, a magnetic member 92 and an elastic member 93. The magnetic member in this embodiment is an armature.

[0042] The magnetic member 92 is T-shaped, and a guide groove 95 opening toward the outer wall of the slide table is formed on its end surface; the magnetic member is accommodated in the accommodation groove 41 , and one end of the magnetic member can pass through the through hole 44 and be inserted into the slot 311 .

[0043] The elastic member 93 is accommodated in the accommodating groove 41 and abuts against the magnetic member 92, so that the long column of the magnetic member 92 has a tendency to escape from the slot 311; the elastic member 93 in this embodiment is a spring, and the elastic member 93 is sleeved on the long column of the magnetic member, and the two ends of the elastic member respectively abut against the bottom surface of the accommodating groove 41 and the cover surface of the magnetic member.

[0044] The electromagnet 91 is connected to the outer wall of the slide 4 , and a guide shaft 94 is connected to the side of the electromagnet 91 facing the magnetic member 92 ; the guide shaft 94 is slidably accommodated in the guide groove 95 .

[0045] The motor, electromagnet and limit switch in this embodiment are all connected to the control system (not shown in the figure) through electrical signals.

[0046] In the automatic state, the user presses the control button on the disinfection cabinet panel (not shown in the figure), the control system receives the command, the electromagnet is energized, and a thrust is generated, which pushes the magnetic part to move inward to overcome the elastic force of the spring, and the long column on the magnetic part is inserted into the slot, and the slide and the nut are in a linkage state; the control system starts the motor to rotate forward at the same time, drives the screw rod to rotate forward in place, and the nut moves along the screw rod, thereby driving the slide to drive the drawer 2 to move forward along the screw rod, and the drawer opens.

[0047] On the contrary, when the control system receives the drawer closing command, the motor reverses, the slide moves backward along the screw rod, and the drawer closes.

[0048] When the drawer is closed or opened, the electromagnet loses power, the magnetic part is separated from the slot under the elastic force of the spring, and the slide is in a state of being separated from the nut. At this time, the drawer is manually pushed and pulled, and the slide moves along the guide rod to open or close the drawer.

[0049] If the power fails when the drawer is halfway opened or closed, the electromagnet loses power, the slide is disconnected from the nut, and the user can open or close the drawer manually. When the power comes back, the limit switch starts the motor, the motor reverses, and drives the nut backward. When the limit switch touches the rear support block, the motor turns off and the nut resets.

Claims

1. A drawer opening mechanism, arranged between a cabinet body (1) and a drawer (2) of a disinfection cabinet, characterized in that It comprises a screw rod (3) and a guide rod (7) which are arranged parallel to the drawing direction of the drawer (2) and are positioned relative to the side wall of the cabinet (1), a nut (31) threadedly connected to the screw rod (3), and a slide (4); The slide (4) is slidably mounted on the guide rod (7); the slide (4) is drivingly connected to the drawer (2); The slide (4) is slidably connected to the nut (31), and a clutch mechanism (9) is provided between the nut (31) and the slide (4) for controlling whether the two are linked. The motor (6) drives and connects the screw rod (3); The clutch mechanism (9) comprises an electromagnet (91), a magnetic member (92) and an elastic member (93); The nut (31) is provided with a slot (311), the slide (4) is provided with a receiving slot (41), one end of the magnetic member (92) is limited in the receiving slot (41), and the other end can pass through the receiving slot (41) and be inserted into the slot (311); The elastic member (93) is accommodated in the accommodation groove (41) and contacts the magnetic member (92), so that the magnetic member (92) has a tendency to escape from the locking groove (311); The electromagnet (91) is connected to the slide (4) and is arranged opposite to the magnetic member (92); when the electromagnet is energized, it repels the magnetic member; The magnetic member (92) is an armature; The electromagnet (91) is connected to the outer wall of the slide (4), and a guide shaft (94) is also connected to the electromagnet (91); correspondingly, a guide groove (95) is provided on the magnetic member (92); the guide shaft (94) is slidably accommodated in the guide groove (95); There are two screw rods (3), which are respectively arranged relative to two opposite inner side walls of the cabinet (1), and the two ends of the screw rod (3) are respectively rotatably connected to the front support block (51) and the rear support block (52); The two ends of the guide rod (7) are respectively supported and connected to the front support block (51) and the rear support block (52); The front support block (51) and the rear support block (52) are connected to the inner wall of the cabinet (1); A limit switch (61) is also provided to enable the motor (6) to be powered on and started when power is restored after power failure. The limit switch (61) is arranged on the outer side wall of the nut (31), and the rear support block is arranged on the travel path of the nut (31). When the limit switch (61) is touched by the rear support block, the motor (6) is powered off and stopped.

2. The drawer opening mechanism according to claim 1, characterized in that There are two guide rods (7), which are respectively arranged on both sides of the screw rod (3); the guide rods (7) are arranged in parallel, and the two ends of the guide rods (7) are respectively connected to the front support block (51) and the rear support block (52), and the slide (4) can be slidably inserted into the guide rods (7).

3. The drawer opening mechanism according to claim 2, characterized in that The front support block (51) and / or the rear support block (52) are also connected to a pulley (54), and the drawer (2) is supported and arranged on the pulley (54).

4. The drawer opening mechanism according to claim 3, characterized in that The front support block (51) and the rear support block (52) are arranged on a bottom plate (8), and the bottom plate (8) is connected to the inner side wall of the cabinet (1).

5. The drawer opening mechanism according to claim 4, characterized in that The motor (6) and the limit switch (61) are both electrically connected to an electric control system, and the electric control system is arranged on a panel of the disinfection cabinet.

Images