Automatic lifting system for storage cabinet

Abstract

The utility model discloses an automatic lifting system for a storage cabinet, comprising a cabinet and a pull-out basket, wherein an opening is provided at the bottom of the cabinet, the pull-out basket is located in the cabinet and the two slide up and down in cooperation; the pull-out basket is connected to the cabinet through a lifting device; the bottom of the pull-out basket is connected to a bottom plate through a strain sensor assembly, and the top edge of the bottom plate corresponds to the bottom opening edge of the cabinet; the strain sensor assembly and the lifting device are both electrically connected to a controller. The automatic lifting system for a storage cabinet provided by the utility model does not occupy space for personnel activities, and is conducive to use in small apartments.

Description

Technical Field

[0001] The utility model relates to the field of storage cabinets, and in particular to an automatic lifting system for a storage cabinet. Background Art

[0002] Traditional storage cabinets generally use the method of opening the cabinet door from the front. The types of cabinet doors include horizontal sliding or flat opening. For storage cabinets with cabinet doors that open from the front, in order to facilitate personnel to open, the height of the cabinet door generally needs to be adapted to the body shape of the personnel, and the position of the storage cabinet cannot be set too high. However, some indoor spaces are limited by the small area. If a traditional cabinet door structure is set up to open from the front, the space allowed for personnel to move will be reduced, and the space will appear crowded. Utility Model Content

[0003] The utility model aims to provide an automatic lifting system for a storage cabinet, which does not occupy the activity space of personnel and is conducive to the use of small households.

[0004] To achieve the above-mentioned purpose, the utility model provides an automatic lifting system for a storage cabinet, including a cabinet and a pull-out basket, wherein an opening is provided at the bottom of the cabinet, the pull-out basket is located in the cabinet and the two slide together up and down; the pull-out basket and the cabinet are connected by a lifting device; the bottom of the pull-out basket is connected to a bottom plate through a strain sensor assembly, and the top edge of the bottom plate corresponds to the bottom opening edge of the cabinet; the strain sensor assembly and the lifting device are both electrically connected to a controller.

[0005] As a further improvement of the present invention, the strain sensor assembly includes a first connecting member, a strain sensor and a second connecting member connected in sequence from top to bottom; the first connecting member is connected to the bottom of the pull-out basket, and the second connecting member is connected to the bottom plate; the strain sensor is electrically connected to the controller.

[0006] As a further improvement of the present invention, the number of the strain sensor assemblies on the bottom plate is at least two.

[0007] As a further improvement of the present invention, the controller is also electrically connected to a structure for acquiring position information of the pull-out basket.

[0008] As a further improvement of the present invention, the lifting device includes a connected pull rope and a winding and unwinding mechanism, which is connected to the winding and unwinding mechanism through a fixed frame in the cabinet, the winding and unwinding mechanism is linked to a motor, and the pull rope is connected to the pull basket; the position information acquisition structure includes a magnetic induction element connected to the motor and used to read the number of rotations of the motor shaft, and the magnetic induction element is electrically connected to the controller.

[0009] As a further improvement of the present invention, the cabinet is connected with a guide rail, the pull-out basket is connected with a slide block, and the guide rail and the slide block are slidably matched up and down.

[0010] As a further improvement of the present invention, a pressure block is connected to one side of the top of the pull-out basket; the cabinet is provided with an upper limit switch, an origin switch and a lower limit switch from top to bottom, which are all electrically connected to the controller. The position of the origin switch is slightly lower than that of the upper limit switch, and the upper limit switch, the origin switch and the lower limit switch all cooperate with the pressure block of the pull-out basket.

[0011] As a further improvement of the present invention, the upper limit switch, the origin switch and the lower limit switch are one of a micro switch, a proximity switch and a photoelectric switch.

[0012] As a further improvement of the utility model, a human body sensing infrared probe is provided on the pull-out basket, and the human body sensing infrared probe is electrically connected to the controller.

[0013] Beneficial Effects

[0014] Compared with the prior art, the advantages of the automatic lifting system of the storage cabinet of the utility model are:

[0015] 1. The pull-out basket can be moved out from the bottom of the cabinet by lifting, allowing people to take items out of the pull-out basket. This structure can raise the fixed position of the cabinet, and when the pull-out basket is not moved out from under the cabinet, it can provide more space for people to move around.

[0016] 2. The strain sensor is connected between the pull-out basket body and the bottom plate of the pull-out basket. When it touches the top and bottom surfaces of the bottom plate of the pull-out basket, the strain sensor can transmit electrical signals to the controller through deformation, so that the controller can control the action of the lifting device. This not only facilitates the automatic lifting and hovering of the pull-out basket, but also effectively prevents the problem of pinching hands between the bottom plate and the bottom of the cabinet, thereby improving safety.

[0017] 3. There are at least two strain sensor assemblies on the bottom plate, which is beneficial to increase the area of ​​the strain sensor that can trigger deformation when the bottom plate is touched, so that the lifting of the pull-out basket can be triggered by touching any position on the upper and lower surfaces of the bottom plate.

[0018] 4. The controller determines the distance of the pull-out basket relative to the cabinet through the position information acquisition structure. Specifically, the number of revolutions of the motor shaft is read through the Hall counter located in the motor.

[0019] 5. Use the upper micro switch to determine whether the pull-out basket has reached the origin of the storage state, and use the lower limit micro switch to determine whether the pull-out basket has reached the lowest point of descent to prevent the pull-out basket from moving beyond the travel range.

[0020] 6. After the pull-out basket is moved downward, if the human body sensing infrared probe does not sense anyone next to the pull-out basket for a period of time, the controller will make the pull-out basket rise again and move into the cabinet. Even if the person forgets to retract the pull-out basket by touching the bottom plate, the pull-out basket can be automatically retracted.

[0021] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A three-dimensional diagram of the automatic lifting system for the storage cabinet;

[0024] Figure 2 This is the front view of the pull-out basket and the lifting device;

[0025] Figure 3 It is a three-dimensional diagram of the pull-out basket and the lifting device;

[0026] Figure 4 for Figure 3 A magnified image of point A;

[0027] Figure 5 for Figure 3 The enlarged view of point B;

[0028] Figure 6 This is the position diagram of the strain sensor assembly at the bottom of the basket;

[0029] Figure 7 is a three-dimensional diagram of a strain sensor assembly;

[0030] Figure 8 is the circuit schematic;

[0031] Fig. 9 A schematic diagram for setting the upper and lower limit points of the pull basket;

[0032] Fig.10 This is a schematic diagram of the entire lifting process of the pull-out basket in working state;

[0033] Fig.11 This is a schematic diagram of the basket stopping midway during descent in working state;

[0034] Fig.12 This is a schematic diagram of the anti-pinch function of the pull-out basket. DETAILED DESCRIPTION

[0035] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0036] Example

[0037] The specific implementation of the utility model is as follows Figures 1 to 12 As shown, an automatic lifting system for a storage cabinet includes a cabinet 1 and a pull-out basket 2. An opening for lifting the pull-out basket 2 is provided at the bottom of the cabinet 1. The pull-out basket 2 is located inside the cabinet 1 and the two slide up and down in cooperation. The pull-out basket 2 is connected to the cabinet 1 through a lifting device. The bottom of the pull-out basket 2 is connected to a bottom plate 8 through a strain sensor assembly 5, and the top edge of the bottom plate 8 corresponds to the bottom opening edge of the cabinet 1. The strain sensor assembly 5 and the lifting device are both electrically connected to the controller. The front of the pull-out basket 2 is connected to its inner cavity for taking and placing items. In addition, a cabinet door 11 is also provided on the front of the cabinet 1. When the lifting device fails to work normally (for example, a power outage or damage to electronic components), the cabinet door 11 can be opened manually to take and place items.

[0038] The strain sensor assembly 5 includes a first connector 51, a strain sensor 52, and a second connector 53 connected in sequence from top to bottom. The first connector 51 is columnar, and the second connector 53 is plate-shaped. The first connector 51 is connected to the bottom of the pull-out basket 2, and the second connector 53 is connected to the bottom plate 8. The strain sensor 52 is electrically connected to the controller. The strain sensor 52 is a resistive strain sensor.

[0039] When the bottom surface of the bottom plate 8 is subjected to pressure, the force will be transmitted upward to the strain sensor 52. The strain sensor 52 is deformed by the upward force and converted into a deformation signal. The deformation signal is transmitted to the strain chip of the controller through wires for processing and amplification. The signal is sent to the main chip of the electronic control motherboard. According to the position of the pull-out basket 2 relative to the cabinet 1 at this time, a descending, stopping or ascending signal is sent to drive the motor of the lifting device to perform corresponding descending, stopping or ascending actions.

[0040] When the top surface of the bottom plate 8 of the pull-out basket 2 is subjected to pressure during the ascending process, the force will be transmitted downward to the strain sensor 52. The strain sensor 52 is deformed by the downward force and converted into a deformation signal. The deformation signal is transmitted to the strain chip of the controller through wires for processing and amplification. The signal is sent to the main chip of the electronic control motherboard, and a stop signal is issued, and the drive circuit drives the motor of the lifting device to stop working.

[0041] There are at least two strain sensor assemblies 5 on the bottom plate 8 . In this embodiment, there are four strain sensor assemblies 5 , which are divided into two groups and symmetrically arranged on the left and right sides of the center line of the bottom plate 8 .

[0042] The controller is also electrically connected to a position information acquisition structure of the pull basket 2. In the present embodiment, the lifting device includes a connected pull cable 4 and a reeling and winding mechanism 3, which is connected to the reeling and winding mechanism 3 through a fixed frame 12 in the cabinet 1, and the reeling and winding mechanism 3 is linked to a motor, and the pull cable 4 is connected to the pull basket 2. The position information acquisition structure includes a magnetic induction element connected to the motor and used to read the number of rotations of the motor shaft, and the magnetic induction element is electrically connected to the controller. In the present embodiment, the magnetic induction element is a Hall counter. The cabinet 1 is connected to a guide rail 62 through a connecting plate 13, and the pull basket 2 is connected to a slider 61, and the guide rail 62 and the slider 61 slide up and down. The real-time height of the pull basket 2 is obtained by the controller reading the value of the Hall counter last recorded by the electronic control.

[0043] In addition, the position information acquisition structure may also use a laser distance measuring sensor, which is installed on the cabinet 1 or the pull-out basket 2 .

[0044] A pressure block 22 is connected to one side of the top of the pull-out basket 2. The pressure block 22 includes a first guide slope, a vertical surface, and a second guide slope arranged in sequence from top to bottom. The cabinet 1 is provided with an upper limit switch 71, an origin switch 72, and a lower limit switch 73, which are all electrically connected to the controller, from top to bottom. The position of the origin switch 72 is slightly lower than the upper limit switch 71. The upper limit switch 71, the origin switch 72, and the lower limit switch 73 are all matched with the pressure block 22 of the pull-out basket 2. The upper limit switch 71, the origin switch 72, and the lower limit switch 73 are one of micro switches, proximity switches, and photoelectric switches.

[0045] In this embodiment, the upper limit switch 71, the origin switch 72 and the lower limit switch 73 are all micro switches. A roller is provided on the driving rod of the micro switch. When the pull basket 2 moves up and down, when the pressing block 22 passes the micro switch and contacts the roller, the micro switch is triggered.

[0046] Human body sensing infrared probes 9 are provided on the left and right side panels of the pull-out basket 2, and the human body sensing infrared probes 9 are electrically connected to the controller.

[0047] The lower limit height of the pull-out basket 2 is adjustable to prevent the items placed on the table below from being pressed down when it is lowered. The upper and lower limit settings of the cabinet pull-out basket are as follows:

[0048] 1) Upper limit point: First, let the pull-out basket 2 protrude downward from the cabinet 1; touch the lower surface of the bottom plate 8 with your hand and press it for a long time (long beep prompt). Fig. 9 As shown in (a), the pull-out basket 2 moves upward under the action of the lifting device, and continues to move upward after hitting the origin switch 72 until the upper surface of the bottom plate 8 hits the lower edge of the cabinet 1 and the pressure reaches the fourth set value. At this time, the pull-out basket 2 stops, and the controller records the height of the pull-out basket 2 as the origin (at this time, it has not reached the position of the upper limit switch). Fig. 9(b) Wherein, the range of the fourth setting value is 0.03N-1.5N, and in this embodiment, it is 0.1N.

[0049] 2) Lower limit: The default lower limit is 530mm below the origin. This distance can be set. After the basket 2 reaches the upper limit and is marked as the origin, the basket 2 moves downward. The customer can operate the basket 2 to move upward or downward during the process. Fig. 9 As shown in (c), when the hand touches the bottom of the bottom plate 8 with the pressure of the fifth setting value, the pull-out basket 2 is suspended and remains in a stopped state for the first setting time. If no operation is performed during this time, the controller records the height of the pull-out basket 2 as the lower limit point (not yet reaching the position of the lower limit switch 73). The controller starts the buzzer to sound for a long time to exit the upper and lower limit point settings. The above-mentioned first setting time is 1-7s, and in this embodiment it is 5 seconds. The above-mentioned fifth setting value ranges from 0.03N to 1.5N, and in this embodiment it is 0.1N.

[0050] The electrical system self-checks and initializes. The system initialization is completed and the system reads the current position of the pull-out basket 2.

[0051] The automatic lifting method of the storage cabinet of the lifting system is as follows:

[0052] When the bottom surface of the bottom plate 8 is touched, the controller obtains the position of the pull-out basket 2 relative to the cabinet 1 in real time through the position information acquisition structure, and chooses to let the pull-out basket 2 rise or fall relative to the cabinet 1. Specifically: 1) Fig.10 As shown in (a), when the pull-out basket 2 is in the storage state (i.e., the pull-out basket 2 is hidden in the cabinet 1), the force touching the lower surface of the bottom plate 8 reaches 0.1N, and the pull-out basket 2 slowly starts and begins to descend, and slowly stops when it reaches the lower limit point. Fig.10 (b) As shown. 2) As Fig.10 As shown in (c), when the pull-out basket 2 is at the lower limit point, the force touching the lower surface of the bottom plate 8 reaches 0.1N, and the pull-out basket 2 slowly starts and begins to rise. When the upper surface of the bottom plate 8 presses the lower edge of the cabinet 1 and reaches a force of 0.1N, the pull-out basket 2 slowly stops. Fig.10 (d) The touch force required for touching the bottom plate 8 to trigger the lifting device to drive the pull-out basket 2 to move up and down can be selected within the range of 0.03N-1.5N.

[0053] When the pull-out basket 2 rises or falls between the origin and the lower limit point in the storage state, a lifting method of slow acceleration in the initial stage, rapid movement in the middle stage, and slow deceleration in the final stage is adopted.

[0054] The pull-out basket 2 is in the ascending stage. When the top edge of the bottom plate 8 contacts the bottom opening edge of the cabinet 1 and the pressure reaches a first set value (eg, 0.1 N), the pull-out basket 2 stops ascending. Fig.11As shown in (a) and (b), when the pull-out basket 2 is in the descending stage and has not yet reached the lower limit position, if the lower surface of the bottom plate 8 is touched so that the pressure on the lower surface of the bottom plate 8 reaches the second set value (for example, 0.1N), the pull-out basket 2 stops descending and moves in the reverse direction at 50% power for more than 2mm before stopping, and the specific reverse movement can be 3mm. The specific values ​​of the first set value and the second set value can be selected within the range of 0.03N-1.5N. If the lower surface of the bottom plate 8 is touched again, the pull-out basket 2 can be raised again. Fig.11 As shown in (c) and (d).

[0055] like Fig.12 As shown in (a)-(d), when the pull-out basket 2 is in the rising stage and has not yet reached the origin of the storage state, if the top surface of the bottom plate 8 is subjected to downward pressure reaching the third set value (for example, 0.3N), the situation may be that the fingers of the person are clamped between the upper surface of the bottom plate 8 and the lower edge of the cabinet 1. At this time, the pull-out basket 2 stops rising and moves in the reverse direction for more than 2mm before stopping. Specifically, the reverse movement can be 20mm to prevent the fingers from being clamped. When the pull-out basket 2 moves in the reverse direction, the power of the reverse movement can be 20%-80% of the rated power. The specific value of the third set value can be selected within the range of 0.03N-1.5N.

[0056] After the pull-out basket 2 is moved downward, if the human body sensing infrared probe 9 does not sense anyone next to the pull-out basket 2 for a period of time, the controller will make the pull-out basket 2 rise again and move into the cabinet 1. Even if the person forgets to retract the pull-out basket by touching the bottom plate, the pull-out basket can be automatically retracted.

[0057] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. An automatic lifting system for a storage cabinet, characterized in that: The cabinet (1) comprises a cabinet body (1) and a pull-out basket (2), wherein an opening is provided at the bottom of the cabinet body (1), the pull-out basket (2) is located inside the cabinet body (1), and the two are slidably matched up and down; the pull-out basket (2) and the cabinet body (1) are connected via a lifting device; the bottom of the pull-out basket (2) is connected to a bottom plate (8) via a strain sensor assembly (5), and the top edge of the bottom plate (8) corresponds to the bottom opening edge of the cabinet body (1); the strain sensor assembly (5) and the lifting device are both electrically connected to a controller.

2. The automatic lifting system for a storage cabinet according to claim 1, characterized in that: The strain sensor assembly (5) comprises a first connecting member (51), a strain sensor (52) and a second connecting member (53) which are connected in sequence from top to bottom; the first connecting member (51) is connected to the bottom of the pull-out basket (2), and the second connecting member (53) is connected to the bottom plate (8); and the strain sensor (52) is electrically connected to the controller.

3. The automatic lifting system for a storage cabinet according to claim 1 or 2, characterized in that: The number of the strain gauge sensor assemblies (5) on the base plate (8) is at least two.

4. The automatic lifting system for a storage cabinet according to claim 1, characterized in that: The controller is also electrically connected to a position information acquisition structure of the pull basket (2).

5. The automatic lifting system for a storage cabinet according to claim 4, characterized in that: The lifting device comprises a pull rope (4) and a reeling and unreeling mechanism (3) connected to each other, and a fixing frame is provided in the cabinet (1). (12) is connected to the reeling and unwinding mechanism (3), the reeling and unwinding mechanism (3) is linked to a motor, and the pull rope (4) is connected to the pull basket (2); the position information acquisition structure includes a magnetic induction element connected to the motor and used to read the number of rotations of the motor shaft, and the magnetic induction element is electrically connected to the controller.

6. The automatic lifting system for a storage cabinet according to claim 1, characterized in that: The cabinet (1) is connected to a guide rail (62), the pull-out basket (2) is connected to a slide block (61), and the guide rail (62) and the slide block (61) are slidably matched up and down.

7. The automatic lifting system for a storage cabinet according to claim 1, characterized in that: A pressure block (22) is connected to one side of the top of the pull-out basket (2); the cabinet (1) is provided with an upper limit switch (71), an origin switch (72) and a lower limit switch (73) from top to bottom, all of which are electrically connected to the controller; the position of the origin switch (72) is slightly lower than the upper limit switch (71); the upper limit switch (71), the origin switch (72) and the lower limit switch (73) are all matched with the pressure block (22) of the pull-out basket (2).

8. The automatic lifting system for a storage cabinet according to claim 7, characterized in that: The upper limit switch (71), the origin switch (72) and the lower limit switch (73) are one of a micro switch, a proximity switch and a photoelectric switch.

9. The automatic lifting system for a storage cabinet according to claim 1, characterized in that: The pull-out basket (2) is provided with a human body sensing infrared probe (9), and the human body sensing infrared probe (9) is electrically connected to the controller.

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