WO2017007244A1

WO2017007244A1 - Touch sensor

Info

Publication number: WO2017007244A1
Application number: PCT/KR2016/007338
Authority: WO
Inventors: 이경연; 이철희
Original assignee: 이경연; 이철희
Priority date: 2015-07-07
Filing date: 2016-07-06
Publication date: 2017-01-12

Abstract

The present invention relates to a touch sensor and, more particularly, to a touch sensor having a solenoid provided therein, wherein the touch sensor: after a plunger is pushed out of a main body case thereof when a detected start command is input, detects the plunger being pushed into the main body case by means of a detected object (bed) and generates a detection signal; and when a detection end command is input, allows the plunger to be pushed in, thereby removing hindering elements that arise and solving spatial limitations while 3D printing or operating machine tools. Also, the touch sensor is capable of carrying out a detecting function quickly and at a low power consumption and enables manpower to be reduced.

Description

Touch sensor

The present invention relates to a touch sensor, and more particularly, having a solenoid therein and, when a detection start command is input, pushes a plunger out of the main body case, and then touches a sensing object (bed). By detecting that the plunger is pushed into the main body case to generate a detection signal, and if there is a command to stop the detection, the plunger can be inserted into the obstacle element generated during operation of a 3D printer or machine tool, etc. The present invention relates to a touch sensor that can be removed, reduced installation space, and effective operation.

Conventional 3D printers or machine tools replace tools of end effectors or detect servo motors, actuators, servo arms to detect the horizontal or position of an object (or bed). Touch sensors formed by devices such as servo arms, touch switches and proximity sensors had to be attached.

FIG. 14 is a touch sensor for determining an object position or horizontality of a conventional 3D printer, and is formed of a servo motor 55, a servo arm 56, and a touch switch 57 on the side of an end effector 50 of the 3D printer. In order to detect the position or level of the sensing object 90, the 3D printer operates the servo motor 55 of the touch sensor so that the touch switch 57 formed at one end of the servo arm 56 detects below. After facing the object 90, the touch switch in a direction in which the distance between the touch switch 57 and the sensing object 90 is narrowed until a detection signal generated by the touch switch 57 is input. 57) or the sensing object 90 is moved, and when the sensing signal is input, the position of the sensing object 90 is calculated, and in case of sensing termination or emergency, the touch switch formed at one end of the servo arm 56 ( The servo switch 55 is moved to move the touch switch 57 upward so that the 57 does not interfere with the next operation.

Meanwhile, the touch switch 57 generates the detection signal when the sensing object 90 approaches the touch switch 57 and comes closer than the predetermined play of the touch switch 57.

The series of processors described above are basically functions provided by existing 3D printers or machine tools, and the horizontal accuracy (tilt) of the sensing object is generally calculated by measuring three or more points.

Therefore, in order to introduce an expensive auto tool changer or an auto sensing device having a complicated structure, the overall volume of the end effector 50 is increased, and thus the size of the output output is relatively reduced, thereby reducing the size of the end effector. There were problems such as space limitation, inefficiency and heat generation of the bed (work table).

In particular, some non-contact detectors used to solve the above problems have a problem that the sensing object should be composed only of a specific material such as metal, and even a serious error occurs in the sensing object such as metal or glass.

Recently, in order to speed up work, increase efficiency, and reduce labor, the demand of the automatic sensing function is increasing. However, many problems have been encountered due to the above problems.

Meanwhile, a touch sensor or end effector has been developed in various forms to detect an object level or position of a 3D printer. Korean Patent Laid-Open No. 10-2015-0098340 discloses a nozzle unit having an auto leveler and a base material cooling unit, and Korean Laid-open Patent No. 10-2016-0027666 discloses a 3D printer equipped with a horizontal measurement sensor unit.

Therefore, the present invention has been made in order to solve the above problems, and provided with a solenoid (solenoid) inside the touch sensor, if a detection start command is input, push the plunger (plunger) out of the main body case, the sensing object It detects the plunger being pushed into the main body case and generates a detection signal, and when the detection end command is issued, the plunger can be inserted so that the sensing function is small, fast and low power consumption regardless of the material of the sensing object. An object is to provide a touch sensor that can be performed.

The present invention as a technical idea for achieving the above object,

A plunger having a permanent magnet formed on top; A main body case having a solenoid formed at one end and a plunger guide formed at the other end to induce movement of the plunger; A core positioned at the center of the solenoid and acting on the magnetic force of the permanent magnet; A detector installed inside the main body case and detecting the plunger being pushed into the main body case by a sensing object; It is characterized by consisting of a control device for inputting and outputting a signal to the outside, receiving a signal from the detector and driving the solenoid.

According to the touch sensor according to the present invention, when a detection start command is provided with a solenoid therein, a plunger is pushed out of the main body case, and the plunger is pushed into the main body case by a sensing object. Senses to generate a detection signal, and if there is a command to end the detection, the plunger can be inserted to overcome the space constraints due to its small volume, to solve heat generation, and to quickly and low power consumption regardless of the material of the sensing object. Various effects can be obtained, such as sensing function and labor saving.

1 is a perspective view of a touch sensor according to an embodiment of the present invention.

2 is an exploded perspective view of a touch sensor according to an embodiment of the present invention.

FIG. 3 is a diagram for describing an internal operation of the touch sensor of FIG. 1.

4 is a view showing a state in which the plunger of the touch sensor according to the embodiment of the present invention is out.

FIG. 5 is a diagram illustrating a state in which the plunger of the touch sensor of FIG. 4 enters the inside.

6 is a view of adjusting the position of the core of the touch sensor in accordance with an embodiment of the hexagon wrench.

FIG. 7 is a detailed internal view illustrating a case where the core of the touch sensor of FIG. 6 is loosened with a hexagon wrench.

FIG. 8 is a detailed internal view illustrating a case where the core of the touch sensor of FIG. 6 is locked with a hexagon wrench.

9 is a diagram using a photo interrupt as a detector of a touch sensor according to an embodiment of the present invention.

10 is a block diagram showing an apparatus for controlling a touch sensor according to an embodiment of the present invention.

11 is a flowchart showing a flowchart of a touch sensor according to an embodiment of the present invention.

FIG. 12 is a diagram when a start command is given by installing the touch sensor of FIG. 1 to a 3D printer.

FIG. 13 is a diagram when the touch sensor of FIG. 1 is installed in the 3D printer to give an end command.

14 is a view showing a state in which a conventional touch sensor is installed in the 3D printer.

FIG. 15 is an internal detailed view of the core of the touch sensor of FIG. 7 when the core of the touch sensor is further removed from the inside of the solenoid.

FIG. 16 is an internal detail view when the core of the touch sensor of FIG. 7 is further inserted into the solenoid.

Detailed description of the major symbols in the drawings

10: touch sensor 20: control device

50: end effector 51: nozzle

52: heat block 55: servo motor

56 Servo Arm 57 Touch Switch

80: hexagon wrench 90: sensing object

100: main body case 101: bobbin

102: plunger guide 103: bobbin hole

110: solenoid 120: core

130: plunger 131: permanent magnet

132: elastic member 140: control board

150: detector 151: photo interrupt

200: control unit 210: signal input and output unit

220: solenoid drive unit 230: detection unit

240: status display unit

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

However, unless otherwise specified, the dimensions, materials, shapes, and relative arrangements of the components described in the present embodiment are not intended to limit the scope of the present invention thereto, and are merely illustrative examples. .

1 is a perspective view of a touch sensor according to an embodiment of the present invention, Figure 2 is an exploded perspective view of a touch sensor according to an embodiment of the present invention, Figure 3 is an internal operation of the touch sensor of Figure 1 4 is a view illustrating a state in which the plunger of the touch sensor according to the embodiment of the present invention is moved outward, and FIG. 5 illustrates a state in which the plunger of the touch sensor of FIG. 4 enters the inside. 6 is a view illustrating a position adjustment of the core of the touch sensor according to the exemplary embodiment of the present invention with a hexagon wrench, and FIG. 7 illustrates a case where the core of the touch sensor of FIG. 6 is loosened with a hexagon wrench. 8 is an internal detailed view of the core of the touch sensor of FIG. 6 with a hexagon wrench, and FIG. 9 is a detector of the touch sensor according to an embodiment of the present invention. A photo interrupt is used, and FIG. 10 illustrates an embodiment of the present invention. 11 is a block diagram illustrating a control device of a tooth sensor, and FIG. 11 is a flowchart illustrating a flowchart of a touch sensor according to an embodiment of the present invention. FIG. 12 is a diagram illustrating the installation of the touch sensor of FIG. 1 in a 3D printer. FIG. 13 is a diagram when the touch sensor of FIG. 1 is installed in the 3D printer to give an end command, and FIG. 14 is a diagram showing a state where the conventional touch sensor is installed in the 3D printer. FIG. 15 is a detailed view of the core when the core of the touch sensor of FIG. 7 is further removed from the inside of the solenoid, and FIG. 16 is a detail of the inside of the core of the touch sensor of FIG. It is also.

For reference, FIGS. 2, 4 to 9 and 15 to 16 are diagrams rotated 90 degrees counterclockwise for convenience of reference to FIG. 1.

Referring to FIG. 14, the conventional touch sensor is formed of the servo motor 55, the servo arm 56, and the touch switch 57 on the side of the end effector 50 of the 3D printer. In order to detect the position or level of the sensing object 90, the 3D printer operates the servo motor 55 of the touch sensor so that the touch switch 57 formed at one end of the servo arm 56 detects below. After facing the object 90, the touch switch in a direction in which the distance between the touch switch 57 and the sensing object 90 is narrowed until a detection signal generated by the touch switch 57 is input. 57) or the sensing object 90 is moved, and when the sensing signal is input, the position of the sensing object 90 is calculated, and in case of sensing termination or emergency, the touch switch formed at one end of the servo arm 56 ( The servo switch 55 is moved to move the touch switch 57 upward so that the 57 does not interfere with the next operation.

The touch sensor 10 according to the present invention, as shown in Figures 1 to 11,

A plunger 130 having a permanent magnet 131 formed thereon;

A main body case (100) having a solenoid (110) formed at one end and a plunger guide (102) for inducing movement of the plunger (130) at the other end;

A core 120 positioned at the center of the solenoid 110 and acting on the magnetic force of the permanent magnet 131;

A detector (150) installed inside the main body case (100) and detecting the plunger (130) being pushed into the main body case (100) by the sensing object (90);

It consists of a control device 20 for inputting and outputting a signal to the outside, receiving a signal from the detector 150 and driving the solenoid 110.

Referring to Figures 3 to 5 the present invention touch sensor 10,

In order to determine the position or level of the sensing object 90, the 3D printer sends an object detection start command to the touch sensor 10 so that the solenoid 110 of the touch sensor 10 moves the plunger 130. After pushing down, the touch sensor 10 or the touch sensor 10 is arranged in a direction in which the distance between the touch sensor 10 and the sensing object 90 is narrowed until a detection signal generated by the touch sensor 10 is input. The sensing object 90 is moved.

At this time, the plunger 130 enters into the main body case 100 by the sensing object 90 which pushes up and touches a lower end of the plunger 130, and the detector 150 has the plunger 130 at a predetermined clearance. Further, when entering into the main body case 100, the permanent magnet 131 formed on the top of the plunger 130 is sensed to provide the detection signal to the control device 20.

Preferably, the detector 150 is a hall sensor for detecting a magnetic field of the permanent magnet 131 or a photo interrupt formed to block light when the plunger 130 moves as shown in FIG. 9. 151.

The plunger 130 may be pushed out of the main body case 100 or drawn into the main body case 100 by an action force with the permanent magnet 131 according to the current direction applied to the solenoid 110. For example, the magnetic force acts as a force to attract or push the permanent magnet 131 according to the generated stimulus of the solenoid 110 of the portion facing the permanent magnet 131.

In addition, when the plunger 130 enters a predetermined length into the main body case 100, the permanent magnet 131 and the core 120 become closer to each other so that the permanent magnet is formed by the magnetic force of the permanent magnet 131. 131 is attached to the core 120 and from this time, the plunger 130 may stay in the body case 100 without any spring or power.

On the other hand, the solenoid 110 is applied to the current only for a predetermined time of the moment to push or pull up the plunger 130 in the main body case 100 and then the plunger 130 is the permanent as described above The magnet 131 is held by gravity in a state in which it is attached to the core 120 or pushed out of the body case 100.

Therefore, the power consumption of the solenoid 110 can be greatly reduced, and heat generation problems that are generally generated in the solenoid can be solved.

Preferably, the core 120 is formed of a ferromagnetic material to which the permanent magnet 131 adheres well.

Referring to FIGS. 2 and 10, the control board 140 may include the control device 20 and the detector 150.

The control device 20 is formed of a signal input and output unit 210 for communicating with the outside, a solenoid drive unit 220 for controlling the solenoid 110, a sensing unit 230 for receiving a signal from the detector 150. .

Preferably, the control device 20 may be formed by adding a status display unit 240 for displaying the position of the plunger 130 or adding a self test function to display the result.

Referring to FIGS. 6 to 8 and 15 to 16, the core 120 may be further pushed in or pulled out of the solenoid 110 by using a tool such as a hexagon wrench 80. When the core 120 is moved to adjust the distance between the core 120 and the permanent magnet 131, a magnetic force acting between the solenoid 110, the core 120, and the permanent magnet 131 is generated. I can regulate it.

In addition, the touch sensor 10 according to the present invention, as shown in Figures 2 and 3,

An elastic member 132 may be formed at an upper end of the permanent magnet 131.

The elastic member 132 has a function of buffering and reducing noise when the plunger 130 moves quickly into the body case 100 and collides with the core 120.

In addition, the elastic member 132 is spaced apart from the core 120 and the permanent magnet 131 and weakens the magnetic force acting between the core 120 and the permanent magnet 131 to the core 120 The suspended permanent magnet 131 has a function of being able to be separated from the core 120 by the weak repulsive force (pushing force) of the solenoid 110.

Preferably, the elastic member 132 according to an embodiment of the present invention is implemented to be formed on the upper end of the permanent magnet 131, but the present invention is not limited thereto and may be formed on the bottom of the core 120. The core 120 may be formed at a predetermined position between the core 120 and the permanent magnet 131.

Looking at the touch sensor 10 of the present invention with reference to FIG.

First, in step S10 it is determined whether there is a detection start command from the 3D printer. The start command is input by the signal input / output unit 210 of the control device 20. If the determination is negative, the process repeats step S10 until a detection start command is received, and if it is positive, moves to the next.

In the next step S20, the solenoid 110 is driven for a predetermined time to push the plunger 130 out of the body case 100.

In the next step S30 it is determined whether the plunger 130 is out. That is, it is checked whether the command of step S20 is correctly performed. If the determination is negative, go to step S50 to output an error signal and then exit.

In the next step S40 it is determined whether there is a detection signal of the detector 150 generated by the plunger 130 is pushed into the body case 100 by the sensing object (90). If the determination is negative, go to step S70, and if yes, go to the next step.

In the next step S60 outputs the detection signal through the signal input and output unit 210 of the control device 20. The 3D printer receives the sensing signal output at this stage.

In the next step S70, it is determined whether there is an end of detection or an end of emergency from the 3D printer. If the determination is negative, step S40 is repeatedly executed, and if negative, the process moves to step S80.

In operation S80, the solenoid 110 is driven for a predetermined time to insert the plunger 130 into the main body case 100 to terminate the sensor operation.

In step S90, it is determined whether the plunger 130 enters the main body case 100. If the determination is negative, go to step S100 to output an error signal, and then terminate.

Referring to FIG. 12, when the detection start command is given to the touch sensor 10 of the present invention, the plunger 130 is pushed out further than the nozzle 51 installed in the end effector 50 so as to extend the touch sensor 10 and the touch sensor 10. When the sensing object 90 is close, the plunger 130 comes into contact with the sensing object 90 before the nozzle 51 to detect the sensing object 90.

Referring to FIG. 13, when the sensing end command is given to the touch sensor 10 of the present invention, the plunger 130 is inserted into the plunger 130 more than the nozzle 51 installed in the end effector 50. Don't get in the way.

Preferably, the start command for initiating the detection may be made of any or predetermined signal. For example, among the servo motor 55 control signals used in the conventional touch sensor of FIG. 14, the detection of the servo motor 55 control signal for directing the touch switch 57 toward the sensing object 90 starts the detection of the present invention. Can be determined by command.

Preferably, the end command for notifying the end of the sensing may be made of any or a predetermined signal. For example, among the servo motor 55 control signals used in the conventional touch sensor of FIG. 14, the touch switch 57 is operated to operate the servo motor 55 so that the touch switch 57 does not interfere with the next operation. The servo motor 55 control signal for moving up may be defined as a detection end command of the present invention.

Therefore, the touch sensor 10 according to the present invention has a solenoid therein, and when a detection start command is input, the plunger is pushed out of the main body case and the plunger is inside the main body case by a sensing object. By detecting the coming in to generate a detection signal, and if there is a detection end command to insert the plunger can be reduced in volume and low power consumption and spatial constraints regardless of the material of the sensing object.

The touch sensor 10 according to the present invention is small in size, fast, and can perform a sensing function regardless of the material of the sensing object with low power consumption without heat generation, to eliminate spatial constraints, and to improve the output quality of a 3D printer or a machine tool. And labor savings.

Claims

In the touch sensor,

A plunger having a permanent magnet formed on top;

A main body case having a solenoid formed at one end and a plunger guide formed at the other end to induce movement of the plunger;

A core positioned at the center of the solenoid and acting on the magnetic force of the permanent magnet;

A detector installed inside the main body case and detecting the plunger being pushed into the main body case by a sensing object;

Touch sensor, characterized in that consisting of a control device for inputting and outputting a signal to the outside, receiving a signal from the detector and driving the solenoid.
The touch sensor of claim 1, wherein an elastic member is formed at an upper end of the permanent magnet or a lower end of the core.
The touch sensor of claim 1, wherein the core is formed to be further pushed in or pulled out of the solenoid.