Driving circuit and piezoelectric jacquard device with same

Abstract

The utility model relates to a driving circuit and a piezoelectric jacquard device with the same, the piezoelectric jacquard device comprises a plurality of piezoelectric jacquard elements and at least one driving circuit, the piezoelectric jacquard elements are arranged in an array mode, and each piezoelectric jacquard element comprises at least one yarn guide needle, at least one piezoelectric ceramic piece C1 and at least one piezoelectric ceramic piece C2. Each yarn guide needle is jointly driven by the piezoelectric ceramic piece C1 and the piezoelectric ceramic piece C2, the driving circuit is used for driving the piezoelectric ceramic piece C1 and the piezoelectric ceramic piece C2 to swing together, the driving circuit is provided with a resistor R1, and one end of the resistor R1 is connected with a signal input end INPUT. According to the utility model, the piezoelectric ceramic piece can be controlled to swing left and right only through one input end, and compared with a driving circuit needing two input ends, half of signal input points can be reduced, so that the wiring space of a printed circuit board is reduced.

Description

Technical Field

[0001] The utility model relates to the field of piezoelectric jacquard, in particular to a driving circuit and a piezoelectric jacquard device with the driving circuit. Background Art

[0002] A plurality of piezoelectric jacquard elements are arranged in the piezoelectric jacquard device, and the piezoelectric jacquard element is used to control the deviation of the yarn guide needle on the warp knitting machine. It is composed of two piezoelectric ceramic sheets, which are separated (insulated) by a glass fiber layer. The piezoelectric ceramic sheet has the property of deforming itself when a voltage is applied. In order to transmit the voltage, an electrode with good elasticity and conductivity is used. By switching the circuit switches on both sides, the voltage is alternately applied to the two sides of the piezoelectric jacquard element, and the piezoelectric ceramic sheet is deformed, causing the yarn guide needle to deviate to the left or right. Because the piezoelectric ceramic sheet acts like a capacitor, the piezoelectric jacquard element can maintain its deflected position, and the deviation is controlled by a current pulse. During use, each piezoelectric ceramic sheet has a corresponding drive circuit for driving.

[0003] At present, it is common in existing drive circuits to set two input signal terminals to input signals, which results in the number of signal input points on the printed circuit board being twice the number of yarn guide needles, occupying the space of the printed circuit board, making it difficult to reduce the area of ​​the printed circuit board, and is not conducive to the miniaturization of the drive circuit. Utility Model Content

[0004] The utility model provides a driving circuit and a piezoelectric jacquard device having the driving circuit, and its main purpose is to overcome the defect that in the existing piezoelectric jacquard device, the driving circuit is provided with two signal input terminals, resulting in a large number of signal input points on the printed circuit board, which occupies the space of the printed circuit board.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A driving circuit and a piezoelectric jacquard device having the driving circuit, the piezoelectric jacquard device comprising a plurality of arranged piezoelectric jacquard elements and at least one driving circuit, the piezoelectric jacquard element comprising at least one yarn guide needle, at least one piezoelectric ceramic sheet C1 and at least one piezoelectric ceramic sheet C2, each of the yarn guide needles being driven by the piezoelectric ceramic sheet C1 and the piezoelectric ceramic sheet C2, the driving circuit being used to drive the piezoelectric ceramic sheet C1 and the piezoelectric ceramic sheet C2 to swing together, the driving circuit comprising a power supply VCC, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15 4, a resistor R5, a resistor R6, a diode D1, a diode D2, a diode D3, a transistor Q1, a transistor Q2, a transistor Q3 and a transistor Q4, one end of the resistor R1 is connected to a signal input terminal INPUT, the other end of the resistor R1 is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is electrically connected to one end of the resistor R2, the other end of the resistor R2 is electrically connected to the base of the transistor Q2, the collector of the transistor Q2, one end of the resistor R3, the positive electrode of the diode D1 The cathode of the diode D1 and the base of the transistor Q3 are connected together, one end of the resistor R4, the cathode of the diode D1 and the emitter of the transistor Q3 are connected together, the other end of the resistor R4 is electrically connected to one end of the piezoelectric ceramic sheet C1, the emitter of the transistor Q1, the other end of the resistor R3, the collector of the transistor Q3, and the other end of the piezoelectric ceramic sheet C1 are connected together and grounded, the emitter of the transistor Q2 is electrically connected to the power supply VCC, one end of the piezoelectric ceramic sheet C2 of the piezoelectric jacquard device is connected to one end of the resistor R5 The piezoelectric ceramic sheet C2 is electrically connected to the piezoelectric ceramic sheet C1, and the other end of the piezoelectric ceramic sheet C2 is grounded together with the other end of the piezoelectric ceramic sheet C1.

[0007] Furthermore, it includes a diode D4, the cathode of the diode D4, the other end of the piezoelectric ceramic sheet C1 and the other end of the piezoelectric ceramic sheet C2 are connected together, the anode of the diode D4, the emitter of the transistor Q1, the other end of the resistor R3 and the collector of the transistor Q3 are connected together and grounded.

[0008] Furthermore, the diode D4 is a voltage stabilizing diode.

[0009] Furthermore, it includes a freewheeling resistor R7, one end of the freewheeling resistor R7, the cathode of the voltage stabilizing diode D4 and the other end of the piezoelectric ceramic sheet C1 are connected together, the other end of the freewheeling resistor R7 is electrically connected to the collector of the transistor Q2, the anode of the diode D4, the emitter of the transistor Q1, the other end of the resistor R3 and the collector of the transistor Q3 are connected together and grounded.

[0010] Compared with the prior art, the beneficial effects produced by the utility model are:

[0011] 1. The utility model has a simple structure and strong practicality. It only needs one input terminal to control the left and right swing of the piezoelectric ceramic piece. Compared with the driving circuit that requires two input terminals, it can reduce half of the signal input points, thereby reducing the wiring space of the printed circuit board and reducing the area of ​​the printed circuit board.

[0012] 2. In the present invention, by providing a voltage stabilizing diode D4 and a freewheeling resistor R7, the driving circuit has a self-contained negative voltage function and does not require an additional negative voltage power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a circuit diagram of Embodiment 1.

[0014] Figure 2 This is a circuit diagram of Embodiment 2.

[0015] Figure 3 This is a circuit diagram of embodiment 3.

[0016] Figure 4 This is the circuit diagram of the driving circuit.

[0017] Figure 5 Schematic diagram of the structure of comb teeth.

[0018] Figure 6 A schematic diagram of the structure of the base.

[0019] Figure 7 It is a schematic diagram of the structure of the yarn guide needle.

[0020] Figure 8 Schematic diagram of the structure of the piezoelectric jacquard element.

[0021] Fig. 9 Schematic diagram of the structure of the second groove.

[0022] Fig.10 Schematic diagram of the structure of the piezoelectric jacquard device.

[0023] Fig.11 Schematic diagram of the structure of the first cavity. DETAILED DESCRIPTION

[0024] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0025] Embodiment 1, refer to Figure 1 and Figure 3 , a driving circuit and a piezoelectric jacquard device having the driving circuit, the piezoelectric jacquard device includes a plurality of arranged piezoelectric jacquard elements and at least one driving circuit.

[0026] Reference Figure 3 The piezoelectric jacquard element includes at least one yarn guide needle, at least one piezoelectric ceramic sheet C1 and at least one piezoelectric ceramic sheet C2. Each yarn guide needle is driven by the piezoelectric ceramic sheet C1 and the piezoelectric ceramic sheet C2. The driving circuit is used to drive the piezoelectric ceramic sheet C1 and the piezoelectric ceramic sheet C2 to swing together. The piezoelectric ceramic sheet C1 can be represented as an equivalent capacitor C1 in the circuit diagram, and the piezoelectric ceramic sheet C2 can be represented as an equivalent capacitor C2 in the circuit diagram. The piezoelectric ceramic sheet C1 and the piezoelectric ceramic sheet C2 are respectively wrapped on both sides of the glass fiber board, and the conductive sheets are electrically connected to the corresponding piezoelectric ceramic sheets.

[0027] Reference Figure 1 The driving circuit includes a power source VCC, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a diode D1, a transistor Q1, a transistor Q2 and a transistor Q3.

[0028] Reference Figure 1 One end of the resistor R1 is connected to a signal input end INPUT, the other end of the resistor R1 is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is electrically connected to one end of the resistor R2, the other end of the resistor R2 is electrically connected to the base of the transistor Q2, the collector of the transistor Q2, one end of the resistor R3, the positive electrode of the diode D1 and the base of the transistor Q3 are connected together, one end of the resistor R4, the negative electrode of the diode D1 and the emitter of the transistor Q3 are connected together, the other end of the resistor R4 is electrically connected to one end of the piezoelectric ceramic sheet C1, the emitter of the transistor Q1, the other end of the resistor R3, the collector of the transistor Q3, and the other end of the piezoelectric ceramic sheet C1 are connected together and grounded, and the emitter of the transistor Q2 is electrically connected to the power supply VCC.

[0029] Reference Figure 1 , transistor Q1 is an NPN transistor, transistor Q2 is a PNP transistor, transistor Q3 is a PNP transistor, and resistor R4 is a current limiting resistor of the piezoelectric ceramic piece C1.

[0030] Reference Figure 1Only one input terminal is needed to control the left and right swing of the piezoelectric ceramic. Compared with the driving circuit that requires two input terminals, the signal input points can be reduced by half, thereby reducing the wiring space of the printed circuit board and reducing the area of ​​the printed circuit board. If the input comes from a register, the register device can be reduced by half; if it is a control device such as an MCU, since the signal input point is reduced by half, it means that a device with fewer pins, lower cost and smaller size can be selected.

[0031] Example 2, refer to Figure 2 The difference between the second embodiment and the first embodiment is that the driving circuit further includes a voltage stabilizing diode D4 and a freewheeling resistor R7, one end of the freewheeling resistor R7, the cathode of the voltage stabilizing diode D4 and the other end of the piezoelectric ceramic sheet C1 are connected together, the other end of the freewheeling resistor R7 is electrically connected to the collector of the transistor Q2, the anode of the voltage stabilizing diode D4, the emitter of the transistor Q1, the other end of the resistor R3 and the collector of the transistor Q3 are connected together and grounded.

[0032] Reference Figure 2 In this embodiment, by providing a voltage stabilizing diode D4 and a freewheeling resistor R7, the driving circuit has a self-contained negative voltage function and does not require an additional negative voltage power supply.

[0033] The other structures are similar to those of the first embodiment and will not be described in detail here.

[0034] Example 3, refer to Figure 3 The difference between the third embodiment and the first embodiment is that the driving circuit includes a power supply VCC, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a diode D1, a transistor Q1, a transistor Q2, a transistor Q3, a resistor R5, a resistor R6, a diode D2, a diode D3 and a transistor Q4. The piezoelectric ceramic piece C1 can be represented as an equivalent capacitor C1 in the circuit diagram, and the piezoelectric ceramic piece C2 can be represented as an equivalent capacitor C2 in the circuit diagram.

[0035] Reference Figure 3One end of the resistor R1 is connected to a signal input end INPUT, the other end of the resistor R1 is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is electrically connected to one end of the resistor R2, the other end of the resistor R2 is electrically connected to the base of the transistor Q2, the collector of the transistor Q2, one end of the resistor R3, the positive electrode of the diode D1 and the base of the transistor Q3 are connected together, one end of the resistor R4, the negative electrode of the diode D1 and the emitter of the transistor Q3 are connected together, the other end of the resistor R4 is electrically connected to one end of the piezoelectric ceramic sheet C1, the emitter of the transistor Q1, the other end of the resistor R3, the collector of the transistor Q3, and the other end of the piezoelectric ceramic sheet C1 are connected together and grounded, and the emitter of the transistor Q2 is electrically connected to the power supply VCC.

[0036] Reference Figure 3 One end of the piezoelectric ceramic piece C2 of the piezoelectric jacquard device is electrically connected to one end of the resistor R5, the other end of the resistor R5, the emitter of the transistor Q4 and the anode of the diode D2 are connected together, one end of the resistor R6, the collector of the transistor Q4 and the emitter of the transistor Q2 are connected together, the other end of the resistor R6, the base of the transistor Q4, the cathode of the diode D2 and the anode of the diode D3 are connected together, the cathode of the diode D3 and the collector of the transistor Q1 are connected together, and the other end of the piezoelectric ceramic piece C2 is grounded together with the other end of the piezoelectric ceramic piece C1.

[0037] The working principle of the driving circuit is as follows:

[0038] Reference Figure 3 When the signal input terminal INPUT inputs a high level, the transistor Q1 is turned on, the transistor Q2 is turned on, and the transistor Q2 charges the piezoelectric ceramic piece C1 through the diode D1 and the resistor R4. Due to the existence of the diode D1, the base and emitter of the transistor Q3 are in a reverse bias state during charging, so the transistor Q3 is cut off, and the piezoelectric ceramic piece C1 is charged; at the same time, the piezoelectric ceramic piece C2 is discharged by the transistor Q1 through the resistors R5, D2, and D3. Due to the existence of D2, the base and emitter of the transistor Q4 are in a reverse bias state when the piezoelectric ceramic piece C2 is discharged, so the transistor Q4 is cut off, and the piezoelectric ceramic piece C2 is discharged normally.

[0039] Reference Figure 3 When the signal input terminal INPUT inputs a low level, the transistors Q1 and Q2 are both in the cut-off state. At this time, the piezoelectric ceramic piece C1 discharges through the resistor R4, the transistor Q3, and the resistor R3; and because the transistor Q1 is cut off, the piezoelectric ceramic piece C2 is charged through the transistor Q4 and the resistor R6.

[0040] Reference Figure 3, transistor Q1 is an NPN transistor, transistor Q2 is a PNP transistor, transistor Q3 is a PNP transistor, and resistor R4 is a piezoelectric ceramic piece C1.

[0041] Reference Figure 3 , transistor Q4 is an NPN transistor, resistor R6 is a bias resistor of transistor Q4, resistor R1 is a bias resistor of transistor Q1, resistor R2 is a bias resistor of transistor Q2, resistor R3 is a bias resistor of transistor Q3, and resistor R5 is a current limiting resistor of the piezoelectric ceramic piece C2.

[0042] Advantages of this drive circuit:

[0043] Only one input terminal is needed to control the left and right swing of the piezoelectric ceramic. Compared with the driving circuit that requires two input terminals, the signal input points can be reduced by half, thereby reducing the wiring space of the printed circuit board and reducing the area of ​​the printed circuit board. If the input comes from a register, the register device can be reduced by half; if it is a control device such as an MCU, since the signal input point is reduced by half, it means that a device with fewer pins, lower cost and smaller size can be selected.

[0044] The other structures are similar to those of the first embodiment and will not be described in detail here.

[0045] Embodiment 4, referring to Figure 4 The difference between the fourth embodiment and the third embodiment is that the driving circuit further includes a voltage stabilizing diode D4 and a freewheeling resistor R7, one end of the freewheeling resistor R7, the cathode of the voltage stabilizing diode D4 and the other end of the piezoelectric ceramic sheet C1 are connected together, the other end of the freewheeling resistor R7 is electrically connected to the collector of the transistor Q2, the anode of the voltage stabilizing diode D4, the emitter of the transistor Q1, the other end of the resistor R3 and the collector of the transistor Q3 are connected together and grounded.

[0046] Reference Figure 4 In this embodiment, by providing a voltage stabilizing diode D4 and a freewheeling resistor R7, the driving circuit has a self-contained negative voltage function and does not require an additional negative voltage power supply.

[0047] The other structures are similar to those of the third embodiment and will not be described in detail here.

[0048] Example 5, refer to Figure 4 The difference between the fifth embodiment and the third embodiment is that the piezoelectric jacquard device includes a plurality of arranged piezoelectric jacquard elements, at least one printed circuit board and at least one driving circuit disposed on the printed circuit board.

[0049] Reference Figure 4The piezoelectric jacquard element includes at least one yarn guide needle, at least one piezoelectric ceramic sheet C1 and at least one piezoelectric ceramic sheet C2. Each yarn guide needle is driven by the piezoelectric ceramic sheet C1 and the piezoelectric ceramic sheet C2. The driving circuit is used to drive the piezoelectric ceramic sheet C1 and the piezoelectric ceramic sheet C2 to swing together. The output end of the printed circuit board is electrically connected to the piezoelectric ceramic sheet C1 and the piezoelectric ceramic sheet C2 through a connector. The piezoelectric ceramic sheet C1 can be represented as an equivalent capacitor C1 in the circuit diagram, and the piezoelectric ceramic sheet C2 can be represented as an equivalent capacitor C2 in the circuit diagram.

[0050] Reference Figure 4 The driving circuit has at least one zener diode D4 and a freewheeling resistor R7, one end of the freewheeling resistor R7, the cathode of the zener diode D4 and the other end of the piezoelectric ceramic sheet C1 are connected together, the other end of the freewheeling resistor R7 is electrically connected to the collector of the transistor Q2, the anode of the zener diode D4, the emitter of the transistor Q1, the other end of the resistor R3 and the collector of the transistor Q3 are connected together and grounded.

[0051] Reference Figure 4, diode D4 is a voltage-stabilizing diode, which is located between the common end of piezoelectric ceramic pieces C1 and C2 and the ground. Its main function is to make the piezoelectric ceramic piece generate a stable negative voltage when working. The generated negative voltage value is equal to the voltage-stabilizing value Vd of diode D4. The charging and discharging of piezoelectric ceramic piece C1 is used to explain its working principle: the common point of piezoelectric ceramic piece C1 and piezoelectric ceramic piece C2 is connected to the voltage-stabilizing diode D4, so the voltage of the common point is constant and equal to the voltage-stabilizing value Vd of diode D4. When the piezoelectric ceramic piece C1 is charged, the voltage of the piezoelectric ceramic piece C1 after charging = D C180-Vd; when the piezoelectric ceramic piece C1 is discharged, the piezoelectric ceramic piece C2 is charged and the negative electrode of C1 is charged due to the existence of the voltage stabilizing diode D4, because: the voltage at the common point of the piezoelectric ceramic piece C2 is constant and equal to Vd, so at this time the piezoelectric ceramic piece C1 will have a reverse voltage, the common point is positive, and the side where the resistor R4 discharges is 0, that is, a negative voltage with a voltage value of Vd is generated on the piezoelectric ceramic piece C1. In general, the negative voltage of C1 is mainly formed by a part of the charging current of C2, which is embedded in its voltage stabilizing value Vd by the voltage stabilizing diode D4, and finally forms a negative voltage. The principle of the piezoelectric ceramic piece C2 is the same. The diode D4 is equivalent to playing the role of a passive negative voltage. On the one hand, the existence of the diode D4 reduces the forward voltage of the piezoelectric ceramic piece when it is working, so it can significantly improve the service life of the piezoelectric ceramic piece without affecting the torque of the piezoelectric ceramic piece, and the voltage stabilizing diode D4 itself is a passive component and will not produce other adverse effects. The function of the freewheeling resistor R7 is that when there is a slight leakage in the piezoelectric ceramic piece C1 or the piezoelectric ceramic piece C2, since the voltage-stabilizing diode D4 itself is a passive component, it will not produce an actual power supply effect. When the negative pressure is maintained for a long enough time, the negative pressure of the piezoelectric ceramic piece C1 or the piezoelectric ceramic piece C2 will gradually decrease over time until it disappears due to leakage. The existence of R7 will provide a very small current to supplement the charge lost by the piezoelectric ceramic piece C1 or the piezoelectric ceramic piece C2 due to leakage, so that the negative pressure can always exist.

[0052] Reference Figure 4 By setting the voltage stabilizing diode D4 and the freewheeling resistor R7, the driving circuit has a negative voltage function and does not require an additional negative voltage power supply.

[0053] The other structures are similar to those of the third embodiment and will not be described in detail here.

[0054] Example 6, refer to Figure 5 , Figure 6 and Figure 7 The difference between the sixth embodiment and the first embodiment is that the piezoelectric jacquard device can be used in a warp knitting machine, and the piezoelectric jacquard device includes a base 1, a plurality of piezoelectric jacquard elements 4 arranged on a part of the base 1, at least one needle position selector 2 arranged on another part of the base 1, and a plurality of comb teeth 3 arranged on the front part of the base 1.

[0055] Reference Figure 5 , Figure 6 and Figure 7 Each piezoelectric jacquard element 4 has an independently swingable yarn guide needle 21 and at least one first piezoelectric ceramic piece 41 that can swing after being energized. The first station 31 of the yarn guide needle 21 is the head needle position, and the third station 33 of the yarn guide needle 21 is the tail needle position. The distance between the first station 31 and the third station 33 is two needle distances. The second station 32 is located in the middle position between the first station 31 and the third station 33. When the torque of the needle position selector 2 is greater than the torque of the yarn guide needle 21, the needle position selector 2 pushes the yarn guide needle 21 to move to the second station 32.

[0056] Reference Figure 5 , Figure 6 and Figure 7 By setting the torque of the needle position selector 2 to be greater than the torque of the yarn guide needle 21, the needle position selector 2 can stably and effectively push the yarn guide needle 21 from the third station 33 to the second station 32, thereby stably realizing the switching of the yarn guide needle 21 between the second station 32 and the third station 33.

[0057] Reference Figure 5 , Figure 6 and Figure 7 When the starting moving position of the yarn guide needle 21 is at the third station 33, the needle position selector 2 pushes the yarn guide needle 21 from the third station 33 to the second station 32, thereby achieving the effect of switching the yarn guide needle 21 from the third station 33 to the second station 32.

[0058] Reference Figure 5 , Figure 6 and Figure 7 The needle position selector 2 includes a plurality of independently swingable limit assemblies 24 , the number of the limit assemblies 24 matches the number of the yarn guide needles 21 , and at least one corresponding limit assemblies 24 is provided on the opposite side of each comb tooth 3 .

[0059] Reference Figure 5 , Figure 6 and Figure 7 A portion of the comb teeth 3 is used to block a portion of the corresponding yarn guide needle 21, so that the yarn guide needle 21 stops swinging at the first station 31.

[0060] Reference Figure 5 , Figure 6 and Figure 7 When the limiting assembly 24 swings and abuts against another part of the corresponding comb tooth 3, the limiting assembly 24 is used to prevent the corresponding yarn guide needle 21 from stopping swinging at the second station 32.

[0061] Reference Figure 5 , Figure 6 and Figure 7 When the limit assembly 24 swings to the opposite side of the comb teeth 3, the limit assembly 24 is used to stop the guide needle 21 from swinging at the third station 33. At this time, the limit assembly 24 is used to block the corresponding part of the guide needle 21 from the first station 31, and the distance between the limit assembly 24 and the first station 31 is two needle pitches.

[0062] Reference Figure 5 , Figure 6 and Figure 7 By setting an independently swingable limit assembly 24 and comb teeth 3, the comb teeth 3 are used to block the guide needle 21, so that the guide needle 21 stops swinging at the first station 31, and the limit assembly 24 is used to stop the corresponding guide needle 21 from swinging at the second station 32, or the limit assembly 24 is used to stop the guide needle 21 from swinging at the third station 33, so that the guide needle 21 can stop swinging at three different stations respectively after being blocked by the corresponding limit assembly 24, thereby achieving the effect that the guide needle 21 can switch back and forth among the three stations.

[0063] Reference Figure 5 , Figure 6 and Figure 7 In this embodiment, the torque of the specific limit component 24 is greater than the torque of the piezoelectric jacquard element 4. By setting the torque of the limit component 24 to be greater than the torque of the piezoelectric jacquard element 4, on the one hand, the thrust provided by the limit component 24 is greater than the swinging force of the yarn guide needle 21 in the piezoelectric jacquard element 4, thereby effectively supporting the yarn guide needle 21, so that the yarn guide needle 21 stops swinging after being blocked by the limit component 24, and then effectively limits the switching of the yarn guide needle 21 between the second station 32 and the third station 33. On the other hand, the yarn guide needle 21 will not break through the blockage of the limit component 24 after being blocked by the limit component 24, thereby preventing the occurrence of needle deviation, achieving the effect of killing two birds with one stone.

[0064] Reference Figure 5 , Figure 6 and Figure 7 The needle selection method of the piezoelectric jacquard device is as follows: the first piezoelectric ceramic piece 41 of the piezoelectric jacquard element 4 drives the yarn guide needle 21 to swing left and right after being energized, so that the yarn guide needle 21 switches positions back and forth between the first station 31, the second station 32 and the third station 33, respectively. The distance between the first station 31 and the third station 33 is two needle pitches, and the distance between the third station 33 and the second station 32 is one needle pitch. The first station 31 is the first needle position of the yarn guide needle 21, the third station 33 is the tail needle position of the jacquard needle, and the second station 32 is located in the middle position between the first station 31 and the third station 33.

[0065] Reference Figure 5 , Figure 6 and Figure 7When the yarn guide needle 21 stops swinging at the third station 33, the limiting assembly 24 abuts against the corresponding part of the yarn guide needle 21. At this time, the limiting assembly 24 is used to block the yarn guide needle 21, and the yarn guide needle 21 is blocked by the blocking piece 22 of the limiting assembly 24 at the third station 33 and stops swinging.

[0066] Reference Figure 5 , Figure 6 and Figure 7 When the yarn guide needle 21 stops swinging at the second station 32, the limiting assembly 24 is configured to apply a thrust to the yarn guide needle 21 so that the yarn guide needle 21 stops swinging at the second station 32. In this embodiment, the limiting assembly 24 of the needle position selector 2 can specifically push the yarn guide needle 21 to move from the third station 33 to the second station 32.

[0067] Reference Figure 5 , Figure 6 and Figure 7 When the yarn guide needle 21 is at the first station 31 , the comb teeth 3 block the yarn guide needle 21 from swinging at the first station 31 .

[0068] Reference Figure 5 , Figure 6 and Figure 7 The limiting assembly 24 is arranged on the side of the yarn guide needle 21 facing the third working station 33.

[0069] Reference Figure 5 , Figure 6 and Figure 7 When the warp knitting machine only needs to use a double-station piezoelectric jacquard device, it is only necessary to control the limit assembly 24 to stop at the third station 33.

[0070] Reference Figure 5 , Figure 6 and Figure 7 When the warp knitting machine needs to use a three-station piezoelectric jacquard device, the limit assembly 24 is controlled to reciprocate at the third station 33 or the second station 32.

[0071] Embodiment 7, reference Figure 6 and Figure 8 The difference between the seventh embodiment and the sixth embodiment is that it also includes a plurality of first accommodating seats 11 arranged on the base 1 and a plurality of second accommodating seats 12 arranged on the base 1, the first accommodating seats 11 have a first fixing portion 111 for mounting the piezoelectric jacquard element 4, the second accommodating seats 12 have a second fixing portion 112 for mounting the limiting assembly 24, and the first accommodating seats 11 are located on the opposite side of the second accommodating seats 12.

[0072] Reference Figure 6 and Figure 8By arranging the first accommodating seat 11 to be located on the opposite side of the second accommodating seat 12, on the one hand, it is possible to effectively adjust the different torques generated between the piezoelectric jacquard element 4 and the limiting assembly 24, and on the other hand, it is convenient to install the piezoelectric jacquard element 4 and the limiting assembly 24 suitable for different torque lengths, thus achieving the effect of killing two birds with one stone.

[0073] Reference Figure 6 and Figure 8 The second piezoelectric ceramic sheet 23 is set longer in order to increase the moment of the second piezoelectric ceramic sheet 23. Due to the need to achieve three working positions, the moment of the second piezoelectric ceramic sheet 23 is greater than the moment of the first piezoelectric ceramic sheet 41.

[0074] Reference Figure 6 and Figure 8 The first piezoelectric ceramic piece 41 of the piezoelectric jacquard element 4 can be replaceably mounted on the first fixing portion 111 , and the second piezoelectric ceramic piece 23 of the limiting assembly 24 can be replaceably mounted on the second fixing portion 112 .

[0075] Reference Figure 6 and Figure 8 The first accommodating seat 11 and the second accommodating seat 12 can be arranged on one side of the upper surface of the base 1, and the first piezoelectric ceramic sheet 41 and the second piezoelectric ceramic sheet 23 are stacked on the upper side of the base 1, or (refer to Fig.10 ) The first accommodating seat 11 can be arranged on one side of the upper surface of the base 1, and the second accommodating seat 12 can be arranged on one side of the lower surface of the base 1. At this time, the first piezoelectric ceramic sheet 41 is arranged above the base 1 and the second piezoelectric ceramic sheet 23 is arranged below the base 1.

[0076] Reference Figure 6 and Figure 8 More specifically, when the first piezoelectric ceramic sheet 41 and the second piezoelectric ceramic sheet 23 are respectively stacked on the base 1 , the first piezoelectric ceramic sheet 41 can be stacked on or below the second piezoelectric ceramic sheet 23 .

[0077] Reference Figure 8 By arranging the second piezoelectric ceramic sheet 23 to be stacked below the first piezoelectric ceramic sheet 41, on the one hand, the second piezoelectric ceramic sheet 23 can be installed more closely on the base 1, so that the baffle 22 can extend more closely into the corresponding comb tooth 3, thereby improving the limiting effect of the baffle 22 on the yarn guide needle 21. On the other hand, the second piezoelectric ceramic sheet 23 drives the baffle 22 to move in the comb tooth 3 to achieve the effect of increasing the position of the yarn guide needle 21, thus achieving the effect of killing two birds with one stone.

[0078] Reference Figure 6By arranging a second piezoelectric ceramic sheet 23 to be stacked above the first piezoelectric ceramic sheet 41, the limiting portion extends to the space between the two comb teeth 3. On the one hand, without affecting the swing of the existing first piezoelectric ceramic sheet 41, the second piezoelectric ceramic sheet 23 is installed to drive the limiting portion to swing, thereby not affecting the jacquard yarn guiding of the original two working positions of the yarn guide needle 21, and maintaining the swing stability of the original yarn guide needle 21. On the other hand, the corresponding yarn guide needle 21 is blocked by the limiting portion, so that the yarn guide needle 21 stops swinging at the preset position of the limiting portion, thereby achieving the effect of increasing the number of working positions of the yarn guide needle 21, achieving the effect of killing two birds with one stone.

[0079] The other structures are similar to those of the sixth embodiment and will not be described in detail here.

[0080] Embodiment 8, refer to Figure 5 , Figure 6 and Figure 7 The difference between the eighth embodiment and the sixth embodiment is that the limiting assembly 24 includes a plurality of bending actuators 25 that can swing left and right after being powered on, and a plurality of blocking pieces 22 respectively arranged on the front of the corresponding bending actuators 25 .

[0081] Reference Figure 5 , Figure 6 and Figure 7 At least a portion of the baffle 22 is driven by the bending changer 25 to move in the moving direction, a portion of the baffle 22 is arranged on the moving path of the guide needle 21 transverse to the moving direction, and another portion of the baffle 22 extends between the corresponding second station 32 and the corresponding third station 33, so that when the guide needle 21 abuts against the baffle 22, the baffle 22 is used to limit the displacement of the corresponding guide needle 21 along the moving direction.

[0082] Reference Figure 5 , Figure 6 and Figure 7 By setting a bending changer 25 to drive the corresponding baffle 22 in a swinging manner, on the one hand, each baffle 22 can be independently switched between the second station 32 and the third station 33, so that each corresponding yarn guide needle 21 can enter the second station 32 or the third station 33 separately, thereby effectively realizing the technical requirements of the three stations; on the other hand, the bending changer 25 has a simple structure and is easy to control, which reduces the overall technical difficulty of the piezoelectric jacquard device and improves the stability of the baffle 23 in blocking the yarn guide needle 21 after switching between the three stations, achieving the effect of killing two birds with one stone.

[0083] Reference Figure 5 , Figure 6 and Figure 7The piezoelectric jacquard element 4 includes at least one deformable first substrate, at least one comb holding end 43 disposed on the front of the first substrate, a first piezoelectric ceramic sheet 41 wrapped on both sides of the first substrate, and two first power terminals 431 disposed on both sides of the tail of the first substrate. The first substrate may be a glass fiber board. The yarn guide needle 21 is disposed on the front of the comb holding end 43.

[0084] Reference Figure 5 , Figure 6 and Figure 7 The bending transformer 25 includes at least one deformable second substrate, a second piezoelectric ceramic sheet 23 wrapped on both sides of the second substrate, and two second power terminals 432 arranged on both sides of the tail of the second substrate. The second substrate can be a glass fiber board. The baffle 22 is arranged on the front of the second substrate, and the baffle 22 can be an inverted L shape. The first power terminal 431 and the second power terminal 432 can both be conductive copper sheets.

[0085] Reference Figure 5 , Figure 6 and Figure 7 A part of the comb teeth 3 is used to stop a part of the guide needle 21 from swinging at the first station 31, and another part of the comb teeth 3 is used to stop a part of the corresponding baffle 22 from swinging at the third station 33, and another part of the corresponding baffle 22 is used to stop another part of the guide needle 21 from swinging at the second station 32.

[0086] Reference Figure 5 , Figure 6 and Figure 7 The comb teeth 3 include at least one comb tooth body 311 disposed on the front of the base 1, at least one first blocking portion 312 for blocking the guide needle 21 from stopping the swing at the first station 31, at least one second blocking portion 313 for blocking the baffle 22 from stopping the swing at the second station 32, at least one third blocking portion 314 for blocking the baffle 22 from stopping the swing at the third station 33, at least one first cavity 400 for accommodating the movement of the guide needle 21, and at least one second cavity 402 for accommodating the movement of the baffle 22. The first blocking portion 312, the second blocking portion 313, and the third blocking portion 314 are arranged on the comb tooth body 311 in sequence from left to right.

[0087] Reference Figure 5 , Figure 6 and Figure 7 When the baffle 22 of the limiting assembly 24 stops on the first blocking portion 312 , the distance between the baffle 22 and the first station 31 is two needle pitches, and the second piezoelectric ceramic plate 23 drives the baffle 22 to swing back and forth between the second blocking portion 313 and the third blocking portion 314 .

[0088] Reference Figure 5 , Figure 6 and Figure 7 A part of the third blocking part 314 is connected to a part of the second blocking part 313, a part of the third blocking part 314 is connected to the base 1, the base 1, the comb tooth body 311, the first blocking part 312, the second blocking part 313 and the third blocking part 314 are integrally molded and cast to form a whole, wherein the base 1, the second blocking part 313 and the third blocking part 314 are integrally molded and cast to form a whole with the shape of a step 315. The whole can be a detachable whole or an inseparable whole.

[0089] Reference Figure 5 , Figure 6 and Figure 7 By setting the base 1, the second blocking part 313 and the third blocking part 314 to be integrally molded and cast, a step 315 shape is formed as a whole, so that mold casting can be used, which effectively improves production efficiency, reduces production costs, and reduces the dimensional errors of each component within a controllable range during mass production.

[0090] Reference Figure 5 , Figure 6 and Figure 7 By setting the second blocking portion 313 and the third blocking portion 314, on the one hand, the blocking piece 22 has a positioning effect during the switching process between the second station 32 and the third station 33, so that the switching of each blocking piece 22 between the second station 32 and the third station 33 is independent of each other and is not affected by other blocking portions or the yarn guide needle 21. On the other hand, in the process of switching the position of the blocking piece 22, the normal jacquard yarn guiding work of the yarn guide needle 21 is not affected, thereby achieving the effect of killing two birds with one stone.

[0091] Reference Figure 5 , Figure 6 and Figure 7 Another part of the blocking piece 22 extends into one side of the second blocking portion 313 , and one side of the second blocking portion 313 is between the second station 32 and the third station 33 .

[0092] Reference Figure 5 , Figure 6 and Figure 7 By setting the first cavity 400 and the second cavity 402, on the one hand, the baffle 22 is only set in the second cavity 402 to swing, so that the baffle 22 is only used to control the switching of the second station 32 and the third station 33, and does not affect the first station 31, thereby improving the overall stability. On the other hand, the left and right sides of the second cavity 402 are the second blocking part 313 and the third blocking part 314, respectively, so as to accurately and effectively locate the specific positions of the second station 32 and the third station 33, improve the accuracy of the baffle 22 in the station switching process, reduce the error, and achieve the effect of killing two birds with one stone.

[0093] Reference Figure 5 , Figure 6 and Figure 7 In this embodiment, the specific spacing between the first blocking portion 312 and the second blocking portion 313 is one stitch length. When the blocking piece 22 stops swinging after being blocked by the third blocking portion 314, the spacing between the second blocking portion 313 and the blocking piece 22 parked on one side of the third blocking portion 314 is one stitch length.

[0094] Reference Figure 5 , Figure 6 and Figure 7 In this embodiment, the specific Figure 7 It is shown that when the blocking piece 22 is blocked by the second blocking portion 313 , the blocking piece 22 stops swinging at the second station 32 . At this time, the blocking piece 22 is used to block the yarn guide needle 21 from stopping swinging at the second station 32 .

[0095] Reference Figure 5 , Figure 6 and Figure 7 When the baffle 22 is blocked by the third blocking portion 314 , the baffle 22 stops swinging at the third station 33 . At this time, the baffle 22 is used to block the yarn guide needle 21 from stopping swinging at the third station 33 .

[0096] Reference Figure 5 , Figure 6 and Figure 7 The torque of the second piezoelectric ceramic plate 23 is greater than the torque of the first piezoelectric ceramic plate 41, so that the thrust provided by the baffle 22 to the yarn guide needle 21 is greater than the pressure generated by the yarn guide needle 21 on the baffle 22, so that when the baffle 22 swings from the third station 33 toward the second station 32, the baffle 22 can push the yarn guide needle 21 to move from the third station 33 toward the second station 32, and finally stop at the second station 32, because the baffle 22 is blocked by the second blocking part 313 and stops, and the yarn guide needle 21 stops at the second station 32 because the torque is less than the torque of the baffle 22, and is pushed to the second station 32.

[0097] Reference Figure 5 , Figure 6 and Figure 7 In addition, the length of the second piezoelectric ceramic sheet 23 can be set to be greater than the length of the first piezoelectric ceramic sheet 41, so that the torque of the second piezoelectric ceramic sheet 23 is greater than the torque of the first piezoelectric ceramic sheet 41, so that the baffle 22 can effectively block the impact of the yarn guide needle 21 on the baffle 22, so that the yarn guide needle 21 can be intercepted by the baffle 22 at the second station 32 or at the third station 33, thereby improving the stability and accuracy of the three-station switching process.

[0098] in, Figure 7The stopper 23 and the yarn guide needle 21 are shown to be located at the second working position 32 .

[0099] The other structures are similar to those of the sixth embodiment and will not be described in detail here.

[0100] Embodiment 9, refer to Fig. 9 The difference between the ninth embodiment and the sixth embodiment is that the space between the second station 32 and the third station 33 is configured as a first groove 51, the first groove 51 is used to accommodate a part of the guide needle 21, and the width of the first groove 51 is one stitch length; the space between the first station 31 and the third station 33 is configured as a second groove 52, the second groove 52 is used to accommodate another part of the baffle 22, and the width of the second groove 52 is two stitch lengths.

[0101] in, Fig. 9 The stopper 23 is shown in the second station 32 .

[0102] The other structures are similar to those of the sixth embodiment and will not be described in detail here.

[0103] Embodiment 10, reference Fig.10 The difference between the tenth embodiment and the eighth embodiment is that the piezoelectric jacquard device further includes at least one jacquard driving device 61, the jacquard driving device 61 includes at least one first driving circuit board 62 having a first driving circuit, a plurality of first power connection ports 63 arranged on the first driving circuit board 62, at least one second driving circuit board 64 having a second driving circuit, and a plurality of second power connection ports 65 arranged on the second driving circuit board 64, the output end of the first driving circuit board 62 is electrically connected to the first power connection terminal 431 of the piezoelectric jacquard element 4 in a coupled manner, the first power connection port 63 is used to transmit an electrical signal, the output end of the second driving circuit board 64 is electrically connected to the second power connection terminal 432 of the second piezoelectric ceramic piece 23 in a coupled manner, and the second power connection port 65 is used to transmit an electrical signal.

[0104] Reference Fig.10 The first driving circuit board 62 includes a first printed circuit board 66 and a first driving circuit arranged on the first printed circuit board 66. The first driving circuit is used to drive the first piezoelectric ceramic piece 41 of the piezoelectric jacquard element 4 to swing. The first power connection port 63 can be respectively arranged on the left and right sides of the first printed circuit board 66.

[0105] Reference Fig.10 The second driving circuit board 64 includes a second printed circuit board 68 and a second driving circuit disposed on the second printed circuit board 68, and the second driving circuit is used to drive the second piezoelectric ceramic piece 23 of the piezoelectric jacquard element 4 to swing. The second power connection ports 65 can be disposed on the left and right sides of the second printed circuit board 68, respectively.

[0106] Reference Fig.10 In this embodiment, a first connector 67 can be provided on the front of the first printed circuit board 66 so that the output end of the first driving circuit board 62 and the first power terminal 431 of the piezoelectric jacquard element 4 are electrically connected in a plug-in manner through the first connector 67 .

[0107] Reference Fig.10 In this embodiment, a second connector 69 can be provided on the front of the second printed circuit board 68 so that the output end of the second driving circuit board 64 and the second power connection end 432 of the second piezoelectric ceramic plate 23 are electrically connected in a plug-in manner through the second connector 69.

[0108] The other structures are similar to those of the sixth embodiment and will not be described in detail here.

[0109] Example 6, refer to Figure 6 and Figure 7 , the difference between the sixth embodiment and the eighth embodiment is that: the upper surface of the base 1 is respectively provided with a bending variable 25 having a second piezoelectric ceramic sheet 23 and a piezoelectric jacquard element 4 having a first piezoelectric ceramic sheet 41, the bending variable 25 is stacked above the piezoelectric jacquard element 4, at least a part of the baffle 22 is driven by the bending variable 25 and displaced in the moving direction, the baffle 22 extends to the space between the two comb teeth 3, the baffle 22 is used to block a part of the guide needle 21 from displacing in the moving direction, when a part of the guide needle 21 abuts against the baffle 22 in a swinging manner, the needle position of the guide needle 21 is limited to one side of the baffle 22 and stops swinging. The baffle 22 is arranged in the movement space of the guide needle 21 in a staggered manner transverse to the moving direction. In this embodiment, the second piezoelectric ceramic sheet 23 is stacked above the first piezoelectric ceramic sheet 41, and the torque of the second piezoelectric ceramic sheet 23 is greater than the torque of the first piezoelectric ceramic sheet 41.

[0110] Reference Figure 6 and Figure 7 The width of the yarn guide needle 21 along the moving direction is greater than the width of the baffle 22 along the moving direction.

[0111] Reference Figure 6 and Figure 7 Each baffle 22 is held on a portion of the comb teeth 3 in at least two different positions.

[0112] The other structures are similar to those of the eighth embodiment and will not be described in detail here.

[0113] Embodiment 7, reference Figure 8 and Fig. 9The difference between the seventh embodiment and the eighth embodiment is that: the upper surface of the base 1 is respectively provided with a bending transformer 25 having a second piezoelectric ceramic sheet 23 and a piezoelectric jacquard element 4 having a first piezoelectric ceramic sheet 41, the bending transformer 25 is stacked below the piezoelectric jacquard element 4, at least a portion of the baffle 22 is driven by the bending transformer 25 to move in the moving direction, the baffle 22 extends into the corresponding comb tooth 3, and the yarn guide needle 21 swings between the corresponding comb tooth 3 and the corresponding baffle 22.

[0114] Reference Figure 8 and Fig. 9 In this embodiment, the second piezoelectric ceramic sheet 23 is stacked below the first piezoelectric ceramic sheet 41 , and the torque of the second piezoelectric ceramic sheet 23 is greater than the torque of the first piezoelectric ceramic sheet 41 .

[0115] The other structures are similar to those of the eighth embodiment and will not be described in detail here.

[0116] Embodiment 8, refer to Fig.10 and Fig.11 The difference between the eighth embodiment and the sixth embodiment is that the piezoelectric jacquard device includes at least one base 1, a plurality of comb teeth 3 arranged on the front of the base 1, at least one piezoelectric jacquard element 4 arranged on the upper surface of the base 1, at least one needle position selector 2 arranged on the lower surface of the base 1, a plurality of slots 71 arranged on the front of the base 1, at least one first fixing portion 111 arranged on the upper surface of the base 1 and at least one second fixing portion 112 arranged on the lower surface of the base 1, the width of the slot 71 is one stitch length, and the tail of the base 1 can be installed on the guide rod of the Raschel warp knitting machine through a connecting piece, and the connecting piece can be directly locked on the mounting seat of the guide rod by screws.

[0117] Reference Fig.10 and Fig.11 Each second piezoelectric ceramic piece 23 can drive the corresponding baffle 23 to swing left and right, and a part of the baffle 23 extends into the corresponding comb teeth 3. A part of the first piezoelectric ceramic piece 41 is mounted on the first fixing part 111, and a part of the second piezoelectric ceramic piece 23 is mounted on the second fixing part 112.

[0118] Reference Fig.10 and Fig.11 By setting the torque of the second piezoelectric ceramic plate 23 to be greater than the torque of the piezoelectric jacquard element 4 , another part of the baffle 23 is used to push the corresponding yarn guide needle 21 to move from the third station 33 to the second station 32 .

[0119] Reference Fig.10 and Fig.11The torque of the second piezoelectric ceramic piece 23 is greater than the torque of the piezoelectric jacquard element 4 , so that when the yarn guide needle 21 stops swinging at the second station 32 , another part of the baffle 23 is also used to block the yarn guide needle 21 .

[0120] Reference Fig.10 and Fig.11 By arranging the baffle 23 and the yarn guide needle 21 inside the comb teeth 3, the corresponding second piezoelectric ceramic sheets 23 drive the corresponding baffles 23 to swing left and right inside the comb teeth 3, so that the position of each baffle 23 can be independently controlled without being affected by other second piezoelectric ceramic sheets 23. On the other hand, the other part of the baffle 23 is used to push the corresponding yarn guide needle 21 to move from the third station 33 to the second station 32, so that the yarn guide needle 21 always remains on one side of the baffle 23 during the position switching process between the second station 32 and the third station 33, thereby preventing the piezoelectric jacar device of the three stations from being deviated, thereby achieving the effect of killing two birds with one stone.

[0121] Reference Fig.10 and Fig.11 By arranging the piezoelectric jacquard element 4 having the first piezoelectric ceramic sheet 41 on the upper surface of the base 1 and arranging the second piezoelectric ceramic sheet 23 on the lower surface of the base 1, on the one hand, without affecting the installation of the yarn guide needle 21, the second piezoelectric ceramic sheet 23 and the baffle 22 are installed on the lower surface of the base 1, so that the swing between the first piezoelectric ceramic sheet 41 and the second piezoelectric ceramic sheet 23 is independent and complementary, thereby effectively maintaining the stability of the piezoelectric jacquard element 4 and the limit assembly 24 during long-term swinging. On the other hand, by arranging the second piezoelectric ceramic sheet 23 on the lower surface of the base 1, a part of the baffle 23 is better extended into the comb teeth 3, achieving the effect of killing two birds with one stone.

[0122] Reference Fig.10 and Fig.11 Each yarn guide needle 21 is adaptively provided with a corresponding comb tooth 3 and a corresponding baffle 23, wherein the corresponding comb tooth 3 is located on the movement space on one side of the yarn guide needle 21, and the other part of the corresponding baffle 23 is located on the movement space on the other side of the yarn guide needle 21.

[0123] Reference Fig.10 and Fig.11 On the one hand, the comb teeth 3 are arranged on the movement space on one side of the yarn guide needle 21, so that the comb teeth 3 prevent the yarn guide needle 21 from stopping swinging at the first needle position. On the other hand, the other part of the corresponding baffle 23 is located on the movement space on the other side of the yarn guide needle 21, so that the baffle 23 switches its position on the other side of the yarn guide needle 21, thereby increasing the number of workstations on the other side of the yarn guide needle 21.

[0124] Reference Fig.10 and Fig.11One side of the slot 71 is connected to a corresponding comb tooth 3 , and the other side of the slot 71 extends to the middle position between two adjacent comb teeth 3 .

[0125] Reference Fig.10 and Fig.11 Each slot 71 extends from the upper surface of the base 1 to the lower surface of the base 1 , and a corresponding comb tooth 3 is provided on the left and right sides of each slot 71 . The baffle 23 extends from the bottom of the slot 71 into the slot 71 , so that at least a portion of the baffle 23 extends between the two comb teeth 3 .

[0126] Reference Fig.10 and Fig.11 By setting the slot 71, on the one hand, the slot 71 can facilitate the baffle 23 to extend between two adjacent comb teeth 3 and swing in the slot 71. On the other hand, the width of the slot 71 can be used to limit the moving distance of the baffle 23, thereby accurately and effectively limiting the baffle 23 from switching back and forth between the first station, the second station and the third station, achieving a dual purpose.

[0127] Reference Fig.10 and Fig.11 When the second power terminal 432 is powered, the second piezoelectric ceramic piece 23 drives the baffle 23 to swing together in the two slots 71 .

[0128] Reference Fig.10 and Fig.11 The comb teeth 3, the base 1, the first fixing portion 111 and the second fixing portion 112 can be made of magnesium alloy material, aluminum alloy material or magnesium-aluminum alloy material.

[0129] Reference Fig.10 and Fig.11 The first cavity 400 is disposed on the upper side of the slot 71 , the first cavity 400 is connected to the slot 71 , the upper portion of the baffle 22 is swung left and right in the first cavity 400 , and the lower portion of the baffle 22 is disposed in the slot 71 to swing left and right.

[0130] Reference Fig.10 and Fig.11 By setting the first cavity 400 and the slot 71, on the one hand, the baffle 22 is only set to swing in the slot 71, so that the baffle 22 is only used to control the switching of the second station 32 and the third station 33, and does not affect the first station 31, thereby improving the overall stability. On the other hand, the left and right sides of the slot 71 are the second blocking portion 313 and the third blocking portion 314, respectively, so as to accurately and effectively locate the specific positions of the second station 32 and the third station 33, improve the accuracy of the baffle 22 in the station switching process, reduce the error, and achieve the effect of killing two birds with one stone.

[0131] In this embodiment, the piezoelectric jacquard device realizes the working principle of three stations:

[0132] The swing amplitude of the double-station piezoelectric jacquard device is one slot needle position, while the three-station piezoelectric jacquard device has an additional station state, so its swing amplitude is two slot needle positions (two needle pitches), that is, in the absence of lateral movement, its swing amplitude is two slot needle positions (two needle pitches).

[0133] Reference Fig.10 and Fig.11 The three-station piezoelectric jacquard device means that the yarn guide needle 21, in addition to swinging left and right, can also accurately stop at the middle position (i.e., the second station 32).

[0134] Reference Fig.10 and Fig.11 The double-station piezoelectric jacquard device can only swing left and right, and its docking position is fixed and accurate. The reason why it is fixed and accurate is that the comb teeth 3 of the base 1 are opened according to the calculated data, and the yarn guide needle 21 will dock on the tooth wall when it swings left or right. Since the spacing of the tooth walls is calculated, as long as the spacing of the tooth walls is correct, the needle position is correct. The piezoelectric ceramic sheet will generate a swing torque after charging. The complete piezoelectric ceramic sheet that can swing left and right is composed of two single piezoelectric ceramic sheets bonded to a glass fiber sheet. Each single piezoelectric ceramic sheet is responsible for a swing direction, that is, one of them is charged and the other is discharged, which will generate the correct swing torque, and the piezoelectric ceramic sheet will swing left or right. This is the basic swing principle of the piezoelectric ceramic sheet.

[0135] Reference Fig.10 and Fig.11 As long as a sufficiently large force moment is generated, the yarn guide needle 21 will be tightly pressed against the wall surface on one side of the comb teeth 3 under the drive of the first piezoelectric ceramic plate 41, and will not be deflected by the yarn, and can accurately pass through the center of the two groove needles.

[0136] Reference Fig.10 and Fig.11 , wherein the width of the slot 71 is the width of one stitch length, the width of the first cavity 400 is the width of two stitch lengths, and there is a second blocking portion 313 between the slot 71 and the first cavity 400, and the shape of the second blocking portion 313 can be a step 315 shape.

[0137] Reference Fig.10 and Fig.11 The first piezoelectric ceramic piece 41 drives the yarn guide needle 21 to swing in the first cavity 400. The position of the yarn guide needle 21 is higher than the second blocking part 313, so it is not affected by the second blocking part 313. Since the width of the first cavity 400 is the width of two needle distances, the first piezoelectric ceramic piece 41 drives the yarn guide needle 21 to swing to the position of two needle distances in the first cavity 400.

[0138] Reference Fig.10 and Fig.11 After the second piezoelectric ceramic sheet 23 is arranged, when the baffle 22 at the front end of the second piezoelectric ceramic sheet 23 moves, since the bottom of the baffle 22 is lower than the second blocking portion 313 and falls into the slot 71, the baffle 22 will be blocked by the second blocking portion 313 and the third blocking portion 314 when swinging, so the upper part of the baffle 22 is limited to swinging left and right in the first cavity 400, and since the first cavity 400 is set to a width of two needle pitches, the baffle 22 can swing left and right in the first cavity 400 by a position of one needle pitch due to the blocking of the second blocking portion 313. Since the second blocking portion 313 will limit the baffle 22, the baffle 22 can only swing between the second blocking portion 313 and the third blocking portion 314.

[0139] Reference Fig.10 and Fig.11 The following describes how the three-station piezoelectric jacquard device works and switches between the three stations, respectively, from left to middle and from right:

[0140] Reference Fig.10 and Fig.11 When the yarn guide needle 21 is on the left (first station 31), the driving circuit controls the first piezoelectric ceramic plate 41 to swing left, and the needle position is at the leftmost position (first station 31). At this time, the baffle 22 can be at any position, which has no effect on the current leftmost needle position (first station 31).

[0141] Reference Fig.10 and Fig.11 , when the yarn guide needle 21 is in the middle (the second station 32): the driving circuit controls the second piezoelectric ceramic 23 to make the baffle 22 swing to the left, and at the same time, controls the yarn guide needle 21 to swing to the right, at this time the baffle 22 will be blocked by the second blocking part 313. Since the moment of force of the baffle 22 is larger than that of the yarn guide needle 21, the yarn guide needle 21 will be pressed tightly on the baffle 22 at this time, but will not push the baffle 22 away to cause the needle to deviate, so the final result is that the baffle 22 stops after being blocked by the second blocking part 313, and the yarn guide needle 21 presses on the baffle 22. Since the position of the baffle 22 when it stops on one side of the second blocking part 313 is exactly the position of one stitch length (i.e. the position of the second station 32), it is equivalent to the yarn guide needle 21 being in the middle station (i.e. the position of the second station 32) at this time.

[0142] Reference Fig.10 and Fig.11, when the yarn guide needle 21 is on the right side (the third station 33): the driving circuit controls the first piezoelectric ceramic plate 41 to swing left so that the yarn guide needle 21 swings to the right, and at the same time controls the baffle 22 in front of the second piezoelectric ceramic plate 23 to swing to the right, the yarn guide needle 21 is in the right position, the yarn guide needle 21 is pressed on the baffle 22, and because the width is pre-set during the initial milling process of the comb teeth 3, including the thickness of the baffle 22, the position where the yarn guide needle 21 presses on the baffle 22 is exactly two stitch lengths, so at this time the yarn guide needle 21 will be in the rightmost position (the third station 33).

[0143] in, Fig.10 The stopper 23 and the yarn guide needle 21 are shown to be located at the second working position 32 .

[0144] The other structures are similar to those of the sixth embodiment and will not be described in detail here.

[0145] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A drive circuit, which acts on a piezoelectric jacquard device, characterized in that: The driving circuit includes a power supply VCC, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a diode D1, a diode D2, a diode D3, a transistor Q1, a transistor Q2, a transistor Q3 and a transistor Q4, one end of the resistor R1 is connected to a signal input end INPUT, the other end of the resistor R1 is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is electrically connected to one end of the resistor R2, the other end of the resistor R2 is electrically connected to the base of the transistor Q2, the collector of the transistor Q2, one end of the resistor R3, the anode of the diode D1 and the base of the transistor Q3 are connected together, one end of the resistor R4, the cathode of the diode D1 and the emitter of the transistor Q3 are connected together, and the other end of the resistor R4 is connected to the piezoelectric ceramic sheet C1. One end of the piezoelectric jacquard device is electrically connected, the emitter of the transistor Q1, the other end of the resistor R3, the collector of the transistor Q3, and the other end of the piezoelectric ceramic sheet C1 are connected together and grounded, the emitter of the transistor Q2 is electrically connected to the power supply VCC, one end of the piezoelectric ceramic sheet C2 of the piezoelectric jacquard device is electrically connected to one end of the resistor R5, the other end of the resistor R5, the emitter of the transistor Q4, and the positive electrode of the diode D2 are connected together, one end of the resistor R6, the collector of the transistor Q4, and the emitter of the transistor Q2 are connected together, the other end of the resistor R6, the base of the transistor Q4, the negative electrode of the diode D2, and the positive electrode of the diode D3 are connected together, the negative electrode of the diode D3 and the collector of the transistor Q1 are connected together, and the other end of the piezoelectric ceramic sheet C2 is grounded together with the other end of the piezoelectric ceramic sheet C1.

2. A driving circuit as claimed in claim 1, characterized in that: It also includes a diode D4, the cathode of the diode D4, the other end of the piezoelectric ceramic sheet C1 and the other end of the piezoelectric ceramic sheet C2 are connected together, the anode of the diode D4, the emitter of the transistor Q1, the other end of the resistor R3 and the collector of the transistor Q3 are connected together and grounded.

3. A driving circuit as claimed in claim 2, characterized in that: Diode D4 is a voltage regulator diode.

4. A driving circuit as claimed in claim 3, characterized in that: It also includes a freewheeling resistor R7, one end of the freewheeling resistor R7, the cathode of the voltage stabilizing diode D4 and the other end of the piezoelectric ceramic sheet C1 are connected together, the other end of the freewheeling resistor R7 is electrically connected to the collector of the transistor Q2, the anode of the diode D4, the emitter of the transistor Q1, the other end of the resistor R3 and the collector of the transistor Q3 are connected together and grounded.

5. A driving circuit as claimed in claim 1, characterized in that: The transistor Q1 is an NPN transistor, the transistor Q2 is a PNP transistor, and the transistor Q3 is a PNP transistor.

6. A driving circuit as claimed in claim 1, characterized in that: The transistor Q4 is an NPN transistor.

7. A driving circuit as claimed in claim 1, characterized in that: The resistor R1 is a bias resistor of the transistor Q1 , the resistor R2 is a bias resistor of the transistor Q2 , the resistor R3 is a bias resistor of the transistor Q3 , and the resistor R6 is a bias resistor of the transistor Q4 .

8. A driving circuit as claimed in claim 1, characterized in that: The resistor R4 is a current-limiting resistor of the piezoelectric ceramic piece C1 , and the resistor R5 is a current-limiting resistor of the piezoelectric ceramic piece C2 .

9. A piezoelectric jacquard device, characterized in that: The invention comprises a plurality of piezoelectric jacquard elements arranged in an array and at least one driving circuit, wherein the piezoelectric jacquard element comprises at least one yarn guide needle, at least one piezoelectric ceramic sheet C1 and at least one piezoelectric ceramic sheet C2, each of the yarn guide needles is driven by the piezoelectric ceramic sheet C1 and the piezoelectric ceramic sheet C2, the driving circuit is used to drive the piezoelectric ceramic sheet C1 and the piezoelectric ceramic sheet C2 to swing together, the driving circuit has at least one voltage stabilizing diode D4, the cathode of the diode D4, the other end of the piezoelectric ceramic sheet C1 and the other end of the piezoelectric ceramic sheet C2 are connected together, and the anode of the diode D4 is grounded.

10. A piezoelectric jacquard device as claimed in claim 9, characterized in that: The driving circuit is the driving circuit of any one of claims 1-8.

Images