CN212088606U

CN212088606U - Control box of anti-pinch lifting office table

Info

Publication number: CN212088606U
Application number: CN202020222505.3U
Authority: CN
Inventors: 高刚强; 曹静
Original assignee: Changzhou Kaidi Electrical Co Ltd
Current assignee: Changzhou Kaidi Electrical Co Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-12-08
Anticipated expiration: 2030-02-27

Abstract

The utility model discloses a prevent control box of pressing from both sides lift desk has main control board, platelet and is used for detecting desktop vibration and/or inclination's detection module in the control box, and the platelet is installed on the main control board and both become certain contained angle, and detection module installs the tip of keeping away from the main control board at the platelet. This prevent pressing from both sides control box of lift desk with detection module is integrated alone at the edge of platelet, when installing the control box at the desktop back and vibrate or when inclining along with the desktop together, the detection module who is located the platelet edge can remove bigger distance, improves the detectivity to vibration and inclination to make prevent pressing from both sides to detect more sensitively, realize good effect of preventing pressing from both sides.

Description

Control box of anti-pinch lifting office table

Technical Field

The utility model relates to a prevent control box of pressing from both sides lift desk.

Background

At present, the gyroscope and the accelerometer which are adopted by the office table anti-pinch system in the market are horizontally attached to the main control board of the control box, so that the judgment threshold value for preventing pinching is very small when the office table is triggered when the office table is inclined, and the office table is easy to trigger by mistake.

The anti-pinch system of the existing automatic lifting office table is judged according to current and provided with a vibration sensor, but the existing anti-pinch system has the defect that the sensitivity is not enough, and the good anti-pinch effect cannot be realized.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the detection module of the existing office table anti-pinch system is unreasonable in installation structure and general in anti-pinch effect.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a prevent control box of pressing from both sides lift desk, has main control board, platelet and is used for detecting the detection module of desktop vibration and/or inclination in the control box, and the platelet is installed on the main control board and both become certain contained angle, and detection module installs the tip of keeping away from the main control board at the platelet.

Furthermore, the included angle between the small plate and the main control board is 60-120 degrees.

Further, the detection module is a gyroscope, an accelerometer or a combination of the two.

An anti-pinch lifting office table is provided with the anti-pinch lifting office table control box.

The utility model has the advantages that: this prevent pressing from both sides control box of lift desk integrates detection module alone at the edge of platelet, and platelet and main control board basic vertical installation, when installing the control box at the desktop back and vibrate or when inclining along with the desktop together, the detection module who is located the platelet edge can remove bigger distance, improves the detectivity to vibration and inclination to make prevent pressing from both sides to detect more sensitively, realize good preventing pressing from both sides effect.

Drawings

FIG. 1 is a schematic view of the internal structure of a control box of an anti-pinch lifting desk;

FIG. 2 is a flow chart of the anti-pinch process of the anti-pinch lifting desk.

Reference numerals: 1-main control board, 2-small board, 3-detection module.

Detailed Description

For a better understanding of the present invention for those skilled in the art, reference will now be made in detail to the present invention, which is illustrated in the accompanying drawings and specific embodiments.

The utility model provides a prevent control box of pressing from both sides lift desk, includes main control board 1, platelet 2 and is used for detecting desktop vibration and/or inclination's detection module 3, and platelet 2 specifically is a little circuit board, and platelet 2 installs on main control board 1, and detection module 3 installs the tip of keeping away from main control board 1 at platelet 2 to be connected with the control unit on the main control board 1. The height of the small plate 2 is 3-4 cm, the included angle between the small plate 2 and the main control board 1 is 60-120 degrees, and the small plate 2 is preferably perpendicular to the main control board 1.

Compared with the detection module 3 directly arranged on the main control board 1, the detection sensitivity of the control box can be expanded by more than 1.5 times. Along with the improvement to desktop vibration and/or inclination's detectivity, correspondingly, prevent pressing from both sides the anti-pinch force of lift desk and also can be little about 10 kilograms, prevent pressing from both sides the effect and compare better with the traditional means of preventing pressing from both sides.

The detection module 3 is a gyroscope, an accelerometer or a combination of the two. When only the gyroscope is adopted, the detection data of the gyroscope is not stable enough, so that the device is not flexible when being used for preventing clamping, and the clamping prevention effect cannot be realized sometimes; only acceleration timing is adopted, and the acceleration meter cannot detect the vibration data, so that an anti-pinch effect cannot be realized; when the gyroscope and the accelerometer are used in a matched mode, the accelerometer is used for stabilizing data detected by the gyroscope, and a good anti-pinch effect is protected.

The gyroscope measures angular velocity and the acceleration is linear. The former is the principle of inertia and the latter is the principle of force balance. The gyroscope measures more accurately in a shorter time, and errors exist due to drift in a longer time. The accelerometer measures accurately over a longer period of time and is subject to error over a shorter period of time due to the presence of signal noise. Therefore, both (mutual adjustment, i.e. complementary filtering) are required to ensure the operational attitude.

At present, the gyroscope is widely applied, and the gyroscope is used in certain games, photographing and shooting, GPS navigation and other mobile phone applications. The invention adopts an application of a gyroscope, the gyroscope is used for calculating the amplitude of the automatic lifting desk, and when the amplitude reaches a certain value, the anti-pinch operation of the motor is triggered. Because the gyroscope is sensitive to vibration, the defect of insufficient sensitivity in the prior art can be overcome.

A gyroscope is an angular motion detection device using a moment-of-momentum sensitive housing of a high-speed rotating body about one or two axes orthogonal to the axis of rotation with respect to the inertial space. Angular motion detection devices made using other principles are also known as gyroscopes, which serve the same function. A gyroscope is also called an angular velocity sensor, and is different from an accelerometer in that the measured physical quantity of the gyroscope is the rotation angular velocity during deflection and inclination, so that the gyroscope is very sensitive to vibration. The vibration can be well measured through the gyroscope, and then the motor can be correspondingly controlled and operated according to the amplitude.

The accelerometer consists of a proof mass (also called a sensitive mass), a support, a potentiometer, a spring, a damper and a shell. The proof mass is constrained to move along only one axis, which is often referred to as the input shaft or the sensitive shaft. When the instrument shell moves with the carrier in an accelerating mode along the sensitive axis direction, the detection mass with certain inertia tries to keep the original moving state unchanged according to Newton's law. Relative movement will occur between it and the housing, causing the spring to deform and the proof mass to accelerate under the force of the spring. When the spring force is balanced with the inertia force generated by the accelerated motion of the detection mass, the detection mass and the shell do not move relatively any more, and the deformation of the spring reflects the magnitude of the detected acceleration. The potentiometer is used as a displacement sensing element to convert the acceleration signal into an electric signal for output. The accelerometer is essentially a one-degree-of-freedom oscillating system, and a damper is required to improve the dynamic quality of the system.

An anti-pinch lifting office table comprises a table body, a lifting device, a hand controller and the control box. The control unit of the main control board 1 of the control box is connected with the lifting device and used for controlling the lifting device to start and stop, and the detection module 3 detects the vibration state and/or the inclination angle of the table top, so that the lifting device is controlled to drive the table body to generate anti-pinch action.

The table body is composed of a table top and four table legs arranged at the bottom of the table top. The driving device is arranged inside the table legs. The control box is arranged at the bottom of the desktop.

The hand controller and the desktop are integrated or designed in a split mode, and when the hand controller and the desktop are arranged in the split mode, the hand controller is connected with the main control board 1 in the control box in a wired mode or a wireless mode (such as a Bluetooth module).

The anti-pinch is realized by detecting the vibration of the desktop as an example:

the detection module 3 in this embodiment includes a gyroscope and an accelerometer. The detection module 3 detects the vibration state of the desktop in real time, when the abnormal motion posture of the desktop is detected, a signal is sent to the control unit, and the control unit controls the lifting device to start and stop, so that the desktop is driven to generate anti-pinch actions, namely the desktop stops or runs reversely.

The gyroscope communicates with a control unit (e.g., MCU) via an IIC interface. The interface is a two-wire interface, which is a data sending and receiving port SDA and a clock port SCL respectively.

And creating an object for monitoring the coordinate change of the gyroscope, monitoring the change of the gyroscope, and calculating the vibration amplitude of the desk in real time when the coordinate state of the gyroscope changes.

When the desktop is in the operation process, the vibration amplitude of the desktop can be detected in real time.

The output of the accelerometer is used to rectify the output of the gyroscope so that the output data of the gyroscope is stable within an acceptable range when the gyroscope is at rest.

The working principle is as follows:

starting the inner set value of the anti-pinch system or setting the anti-pinch sensitivity level by the user. The anti-pinch system continuously corrects the reference value of the vibration amplitude when the desktop is in a static state, and once the desktop starts to move, the anti-pinch system can trigger anti-pinch action on the basis of the reference value which is larger than or equal to 0.5 mm.

In the process of lifting the desktop to a specified position, if the detection module 3 in the control box detects that the vibration amplitude of the desktop is too large, the detection module sends a signal to the control unit, and the control unit controls the lifting device to stop and run reversely, so that the desktop stops and moves to a safe distance in the opposite direction, and then responds to a lifting command sent by a key of the hand controller to the control unit in the control box.

The above embodiments are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the above embodiments should be included in the scope of the present invention.

Claims

1. The utility model provides a prevent control box of pressing from both sides lift desk which characterized in that: the control box is internally provided with a main control board (1), a small plate (2) and a detection module (3) for detecting the vibration and/or inclination angle of the desktop, the small plate (2) is arranged on the main control board (1) and forms a certain included angle with the main control board, and the detection module (3) is arranged at the end part, far away from the main control board (1), of the small plate (2).

2. The anti-pinch lifting desk control box according to claim 1, characterized in that: the included angle between the small plate (2) and the main control board (1) is 60-120 degrees.

3. The anti-pinch lifting desk control box according to claim 1, characterized in that: the detection module (3) is a gyroscope, an accelerometer or a combination of the gyroscope and the accelerometer.

4. The utility model provides an prevent pressing from both sides lift desk which characterized in that: the desk has the control box of claim 1 for the pinch resistant elevating desk.