Liquid material extrusion device

Abstract

The utility model discloses a liquid material extrusion device, which comprises a driving module, a liquid material extrusion module and a liquid material extrusion module, the driving mechanism is provided with a lever and a piezoelectric actuator applying force to the lever; the liquid chamber module is arranged below the driving module; the liquid chamber module is provided with a liquid chamber for containing liquid materials and a plunger, one end of the plunger extends into the liquid chamber, and the other end of the plunger is stressed by the lever. A magnetic piece is arranged on the lever; a magnetic sensor capable of sensing the magnetic piece is arranged in the cavity; therefore, emission and receiving of light do not need to be considered, and the influence of an assembly position or environment smudginess on an induction result can be reduced.

Description

Technical Field

[0001] The utility model relates to a liquid material extrusion device, in particular to a liquid material extrusion device for extruding liquid material. Background Art

[0002] Taiwan Patent No. I650179B "Liquid Material Extrusion Device and Locking Detection Method" discloses a liquid material extrusion device, including: a driving module, including a driving cavity, a chamber is provided in the chamber, a piezoelectric actuator unit and a lever mechanism are provided in the chamber; the lever mechanism can be driven by the action force of the piezoelectric actuator unit to swing a lever downward; a liquid supply module, arranged below the driving module, including a liquid supply seat located above and a valve seat located below; a flow channel is provided in the liquid supply seat to guide the liquid material into a liquid supply interval A liquid chamber is provided between the lower part of the liquid supply interval and an extrusion port of the valve seat; a plunger module is provided between the driving module and the liquid supply module, and is provided with a plunger and a plunger seat, the plunger is provided in a pivot hole inside the plunger seat, one end of the plunger is pressed by the lever, and the other end is located in the liquid chamber: a detection unit is provided in the chamber, which detects the movement state of the lever or the plunger with a detector such as a reflective photoelectric switch and records the signal strength; when the lever cannot move, it is determined that a front end portion of the plunger is in contact with the extrusion port of the valve seat.

[0003] However, the detectors of the prior art use reflective photoelectric switches, and the emission and reception of light may change due to the assembly position or environmental dirt, thereby affecting the sensing results, such as affecting the signal strength and signal immediacy, etc. It can be seen that the detectors of the prior art still need to be improved. Utility Model Content

[0004] Therefore, an object of the present invention is to provide a liquid material extrusion device that can improve at least one disadvantage of the prior art.

[0005] The liquid material extrusion device according to the purpose of the utility model includes: a driving module, a driving mechanism is provided in a chamber of a cavity; the driving mechanism is provided with a lever and a piezoelectric actuator applying force to the lever; a liquid chamber module is provided below the driving module; the liquid chamber module is provided with a liquid chamber for accommodating liquid material, and a plunger with one end extending into the liquid chamber and the other end being applied by the lever; a magnetic part is provided on the lever; and a magnetic sensor that can sense the magnetic part is provided in the cavity.

[0006] Another liquid material extrusion device according to the purpose of the utility model includes: a driving module, a driving mechanism is provided in a chamber of a cavity; the driving mechanism is provided with a lever and a piezoelectric actuator applying force to the lever; a liquid chamber module, arranged below the driving module; the liquid chamber module is provided with a liquid chamber for accommodating liquid material, and a plunger with one end extending into the liquid chamber and the other end being applied by the lever; a magnetic part is provided on the plunger; and a magnetic sensor that can sense the magnetic part is provided in the cavity.

[0007] According to the liquid material extrusion device of the embodiment of the utility model, the use of the magnetic member and the magnetic sensor does not need to consider the emission and reception of light, which can reduce the influence of the assembly position or environmental dirt on the sensing result. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional schematic diagram of a liquid material extrusion device according to an embodiment of the utility model;

[0009] Figure 2 It is a partial cross-sectional schematic diagram of the liquid material extrusion device of the utility model;

[0010] Figure 3 It is a three-dimensional schematic diagram of a liquid material extrusion device of the utility model in which a magnetic component is installed on the upper surface of a lever;

[0011] Figure 4 It is a schematic diagram of the controller of the liquid material extrusion device of the utility model being electrically connected to the piezoelectric actuator and the magnetic sensor;

[0012] Figure 5 It is a schematic diagram of another embodiment of the present invention in which a magnetic member of a liquid material extrusion device is installed on a first side surface of a lever;

[0013] Figure 6 It is a schematic diagram of a liquid material extrusion device according to another embodiment of the utility model, in which a magnetic member is installed on a second side surface of a lever;

[0014] Figure 7 It is a schematic diagram of a liquid material extrusion device according to another embodiment of the present utility model, in which a magnetic member is installed on the upper surface of a plunger;

[0015] Figure 8 It is a schematic diagram of another embodiment of the present invention in which the magnetic member of the liquid material extrusion device is installed on the first side surface of the plunger;

[0016] Fig. 9 This is a schematic diagram of a liquid material extrusion device according to yet another embodiment of the present invention, in which a magnetic component is installed on a second side surface of a plunger.

[0017] Description of reference numerals:

[0018] A: drive module A1: cavity

[0019] A11: Chamber A2: Driving mechanism

[0020] A21: Lever A21a: Upper surface

[0021] A21b: first side surface A21c: second side surface

[0022] A211: Receptacle A22: Piezoelectric actuator

[0023] A23: fulcrum A24: first elastic member

[0024] A3: Buckle assembly A31: Buckle

[0025] A4: Mounting part A41: Fixed part

[0026] A42: Installation part B: Liquid chamber module

[0027] B1: Liquid chamber B2: Plunger

[0028] B2a: upper surface B2b: first side surface

[0029] B2c: Second side surface B3: Plunger seat

[0030] B31: Pivot hole B32: Second elastic member

[0031] B4: Liquid chamber seat B5: Valve mouth

[0032] B51: Valve surface B52: Liquid outlet channel

[0033] C: Magnetic part C1: First magnetic part

[0034] C2: Second magnetic part C3: Third magnetic part

[0035] C4: fourth magnetic piece C5: fifth magnetic piece

[0036] D: Magnetic sensor D1: First magnetic sensor

[0037] D2: Second magnetic sensor D3: Third magnetic sensor

[0038] D4: fourth magnetic sensor D5: fifth magnetic sensor

[0039] E: Controller. DETAILED DESCRIPTION

[0040] See also Figure 1 , 2 The embodiment of the utility model can be described by a liquid material extrusion device as shown in the figure, and the liquid material extrusion device includes:

[0041] A driving module A is provided with a driving mechanism A2 in a chamber A11 of a cavity A1; the driving mechanism A2 is provided with a lever A21 and a piezoelectric actuator A22 exerting force on the lever A21;

[0042] A liquid chamber module B is disposed below the driving module A; the liquid chamber module B is provided with a liquid chamber B1 for accommodating liquid material, and a plunger B2 with one end extending into the liquid chamber B1 and the other end being exerted by the lever A21;

[0043] A magnetic component C is disposed on the lever A21 ; a magnetic sensor D capable of sensing the magnetic component C is disposed in the chamber A11 .

[0044] See also Figure 1 , 2 The liquid chamber module B can be selectively clamped by two buckles A31 (only one buckle is shown in the figure, and the other buckle is correspondingly arranged on the other side) of a buckle assembly A3 of the driving module A to facilitate combination with or separation from the driving module A;

[0045] The driving mechanism A2 is provided with a fulcrum A23 and a first elastic member A24; the piezoelectric actuator A22 is provided above the lever A21, and the fulcrum A23 and the first elastic member A24 are provided below the lever A21. The lever A21 can be driven by the piezoelectric actuator A22 to swing downward to accumulate the elastic restoring force of the first elastic member A24; the upper end of the plunger B2 is pressed by one end of the lever A21, and the lower end of the plunger B2 extends into the liquid chamber B1.

[0046] See also Figure 2 The liquid chamber module B is provided with a plunger seat B3 and a liquid chamber seat B4; the liquid chamber B1 is arranged between the plunger seat B3 and the liquid chamber seat B4, the plunger B2 is pivoted in the plunger seat B3 and can be driven by the driving mechanism A2 to move up and down, so that the lower end of the plunger B2 selectively contacts a conical valve surface B51 of a valve mouth B5 to close or open a liquid outlet channel B52; a second elastic member B32 is provided in a pivot hole B31 of the plunger seat B3 for the plunger B2 to pivot, and the second elastic member B32 provides elastic restoring force for the plunger B2 when it moves downward.

[0047] See also Figure 2 , 3, the magnetic component C may be, for example, a magnet, and the magnetic sensor D may be, for example, a Hall sensor; the magnetic sensor D is arranged on a mounting component A4, and the mounting component A4 is provided with a fixing portion A41 fixed to the cavity A1 and a mounting portion A42 for installing the magnetic sensor D; the magnetic sensor D is arranged between the mounting component A4 and the lever A21; a receiving groove A211 is recessed on the lever A21, and the magnetic component C is arranged in the receiving groove A211 and does not protrude from the receiving groove A211; the magnetic component C is arranged on an upper surface A21a of the lever A21, and the magnetic sensor D is correspondingly arranged above the magnetic component C.

[0048] See also Figure 2 , 4 The liquid material extrusion device is provided with a controller E which is electrically connected to the magnetic sensor D and the piezoelectric actuator A22 respectively. The controller E has the following functions, namely, it can control the force applied to the lever A21 by the piezoelectric actuator A22 of the driving mechanism A2 according to the signal of the magnetic sensor D; the piezoelectric actuator A22 can be controlled to expand or contract to change the force applied to the lever A21, and link the plunger B2 to move up and down to squeeze the liquid material in the liquid chamber B1 out of the valve mouth B5.

[0049] In the implementation of the liquid material extrusion device of the present invention, the controller E can change the expansion or contraction of the volume of the piezoelectric actuator A22 according to preset parameters and in a controlled conductive manner. When the volume of the piezoelectric actuator A22 expands, the piezoelectric actuator A22 drives the lever A21 to swing downward and press the plunger B2 to move downward, thereby compressing the first elastic member A24 and the second elastic member B32 to accumulate elastic restoring force, so that the lower end of the plunger B2 contacts the valve surface B51 of the valve nozzle B5, so as to close the liquid outlet channel B52 to prevent the liquid material in the liquid chamber B1 from being discharged; During the process of moving downward and not yet contacting the valve surface B51, the liquid material in the liquid chamber B1 is squeezed by the plunger B2 and squeezed out through the liquid outlet channel B52; when the volume of the piezoelectric actuator A22 is reduced, the lever A21 is swung upward by the elastic restoring force of the first elastic member A24, and at the same time, the plunger B2 is moved upward by the elastic restoring force of the second elastic member B32 to open the liquid outlet channel B52; the piezoelectric actuator A22 drives the lever A21 to link the plunger B2 to move back and forth up and down, so that the liquid material in the liquid chamber B1 can be continuously squeezed out;

[0050] When the lever A21 swings up and down, the magnetic member C also moves with the lever A21 and generates relative motion (i.e., a change in vertical distance or horizontal distance) with the magnetic sensor D fixed on the cavity A1; the magnetic member C moves back and forth toward or away from the magnetic sensor D, so that the magnetic sensor D can sense different magnetic field strengths and transmit them to the controller E; because the plunger B2 is linked to the lever A21, the controller E can convert the magnetic field strength into the movement stroke of the plunger B2 using a built-in algorithm. And determine whether the moving stroke of the plunger B2 meets the preset value; if it meets the preset value, the controller E continues to control the piezoelectric actuator A22 to expand or shrink to the preset volume according to the preset parameters; if it deviates from the preset value, the controller E controls the piezoelectric actuator A22 to expand or shrink to a volume that can make the moving stroke of the plunger B2 return to the volume that meets the preset value, that is, when the moving stroke of the plunger B2 deviates from the preset, the moving speed of the plunger B2 can be compensated to make the moving stroke of the plunger B2 return to the preset value;

[0051] In addition to maintaining the travel stroke of the plunger B2 at a preset value during liquid material extrusion operations, the embodiments of the utility model are still applicable to the lock detection before liquid material extrusion operations in the prior art. In addition, if the travel stroke of the plunger B2 continues to deviate from the preset value, it may also indicate that, for example, the plunger B2 or the valve mouth B5 is severely worn and needs to be replaced, and the liquid material extrusion operation can be stopped for inspection.

[0052] In the liquid material extrusion device of the embodiment of the utility model, the use of the magnetic component C and the magnetic sensor D does not need to consider the emission and reception of light, which can reduce the influence of the assembly position or environmental dirt on the sensing result.

[0053] See also Figure 5 In another embodiment of the utility model, the first magnetic member C1 is disposed on a first side surface A21b of the lever A21, and the first magnetic sensor D1 is correspondingly disposed on the side of the first magnetic member C1. The first magnetic member C1 and the first magnetic sensor D1 are at the same horizontal height and are spaced apart on a straight line in the X-axis direction.

[0054] See also Figure 6 In another embodiment of the utility model, the second magnetic member C2 is disposed on a second side surface A21c of the lever A21, and the second magnetic sensor D2 is correspondingly disposed on the side of the second magnetic member C2. The second magnetic member C2 and the second magnetic sensor D2 are at the same horizontal height and are spaced apart on a straight line along the Y-axis.

[0055] See also Figure 7In another embodiment of the utility model, the third magnetic component C3 is arranged on an upper surface B2a of the plunger B2 in contact with the lever A21, and the third magnetic sensor D3 is correspondingly arranged above the second magnetic component C2. The third magnetic component C3 and the third magnetic sensor D3 are at different heights and are spaced apart on a straight line in the Z-axis direction.

[0056] See also Figure 8 In yet another embodiment of the present invention, the fourth magnetic member C4 is disposed on a first side surface B2b of the plunger B2, and the fourth magnetic sensor D4 is correspondingly disposed on the side of the fourth magnetic member C4. The fourth magnetic member C4 and the fourth magnetic sensor D4 are at the same horizontal height and are spaced apart on a straight line in the X-axis direction.

[0057] See also Fig. 9 In yet another embodiment of the present invention, the fifth magnetic member C5 is disposed on a second side surface B2c of the plunger B2, and the fifth magnetic sensor D5 is correspondingly disposed on the side of the fifth magnetic member C5. The fifth magnetic member C5 and the fifth magnetic sensor D5 are at the same horizontal height and are spaced apart on a straight line along the Y-axis direction.

[0058] However, the above is only a preferred embodiment of the present utility model, and it cannot be used to limit the scope of implementation of the present utility model. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present utility model and the content of the utility model description are still within the scope of the present utility model patent.

Claims

1. A liquid material extrusion device, comprising: A driving module is provided with a driving mechanism in a chamber of a cavity; the driving mechanism is provided with a lever and a piezoelectric actuator applying force to the lever; A liquid chamber module is disposed below the driving module; the liquid chamber module is provided with a liquid chamber for accommodating liquid material, and a plunger with one end extending into the liquid chamber and the other end being exerted by the lever; The invention is characterized in that: a magnetic part is arranged on the lever; and a magnetic sensor which can sense the magnetic part is arranged in the cavity.

2. The liquid material extrusion device according to claim 1, characterized in that: The magnetic sensor is arranged on a mounting piece, and the mounting piece is provided with a fixing part fixed to the cavity and a mounting part for the magnetic sensor to be mounted.

3. The liquid material extrusion device according to claim 2, characterized in that: The magnetic sensor is arranged between the mounting piece and the lever.

4. The liquid material extrusion device according to claim 1, characterized in that: The lever is concavely provided with a receiving groove, and the magnetic component is arranged in the receiving groove.

5. The liquid material extrusion device according to claim 4, characterized in that: The magnetic member does not protrude from the receiving groove.

6. The liquid material extrusion device according to claim 1, characterized in that: The magnetic component is arranged on an upper surface of the lever, and the magnetic sensor is correspondingly arranged above the magnetic component.

7. The liquid material extrusion device according to claim 1, characterized in that: The magnetic piece is arranged on a side surface of the lever, and the magnetic sensor is correspondingly arranged on the side edge of the magnetic piece.

8. The liquid material extrusion device according to claim 1, characterized in that: A controller is electrically connected to the magnetic sensor and the piezoelectric actuator respectively. The controller has the following function, that is, it can control the force applied by the piezoelectric actuator to the lever according to the signal of the magnetic sensor.

9. A liquid material extrusion device, comprising: A driving module is provided with a driving mechanism in a chamber of a cavity; the driving mechanism is provided with a lever and a piezoelectric actuator applying force to the lever; A liquid chamber module is disposed below the driving module; the liquid chamber module is provided with a liquid chamber for accommodating liquid material, and a plunger with one end extending into the liquid chamber and the other end being exerted by the lever; The invention is characterized in that: a magnetic piece is arranged on the plunger; and a magnetic sensor which can sense the magnetic piece is arranged in the cavity.

10. The liquid material extrusion device according to claim 9, characterized in that: The magnetic component is arranged on an upper surface of the plunger contacting the lever, and the magnetic sensor is correspondingly arranged above the magnetic component.

11. The liquid material extrusion device according to claim 9, characterized in that: The magnetic component is arranged on a side surface of the plunger, and the magnetic sensor is correspondingly arranged on the side edge of the magnetic component.

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