Piezoelectric jacquard unit and textile machine

Abstract

A piezoelectric jacquard unit and a textile machine, the textile machine comprising at least one piezoelectric jacquard unit and at least one power supply unit, the piezoelectric jacquard unit comprising at least a first jacquard head and at least a second jacquard head, the first jacquard head comprising a plurality of first guide needles for guiding yarns and a plurality of first actuators, the second jacquard head comprising a plurality of second guide needles for guiding yarns and at least a second actuator, the first actuators being configured to drive corresponding first guide needles to oscillate, the second actuator being configured to drive corresponding second guide needles to oscillate. In the present invention, by providing each first guide needle with at least X stations, where X≥3, the pattern style is enriched by increasing the stations of the first guide needles.

Description

Technical Field

[0001] This invention relates to the field of textile machinery, and in particular to a piezoelectric jacquard unit and textile machinery. Background Technology

[0002] Currently, the guide needles in existing jacquard units are all double-station. However, the patterns woven by existing double-station jacquard are beginning to fail to meet the modern society's demand for diverse and personalized patterns. Moreover, most existing jacquard are double-station jacquard, and the guide needle can only swing left and right by one stitch length.

[0003] To increase the variety of patterns on fabrics, the best way is to increase the number of guide needle stations. When one more station is added, the number of patterns can be multiplied. Summary of the Invention

[0004] This invention provides a piezoelectric jacquard unit and textile machinery, the main purpose of which is to overcome the shortcomings of existing jacquard units where the yarn guide needles have only two stations and the number of patterns cannot meet the needs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A piezoelectric Jacquard unit and textile machinery are disclosed. The textile machinery includes at least one piezoelectric Jacquard unit and at least one power supply unit. The power supply unit is alternatively mounted on the power receiving end of the yarn guide needle block. The power supply unit is used to transmit power signals or pattern data. The piezoelectric Jacquard unit includes at least one first jacquard device, at least one second jacquard device, and at least one common base. The first jacquard device includes a plurality of first yarn guide needles for jacquard yarn guiding and a plurality of first actuators. The second jacquard device includes a plurality of second yarn guide needles for jacquard yarn guiding and at least one second actuator. The first actuator is used to drive the corresponding first yarn guide needle to swing. Each first yarn guide needle has at least X working positions. The second actuator is used to drive the corresponding second yarn guide needle to swing. The second jacquard device drives the second yarn guide needle to swing. Each second yarn guide needle has at least Y working positions, where X≥3 and Y≥2.

[0006] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention features a simple structure and strong practicality. By setting each first guide needle to have at least X working positions, where X≥3, the number of working positions of the first guide needle is increased to enrich the pattern styles. When the first guide needle is making the patterned base mesh, it can use various organizational effects such as thick organization, thin organization, and mesh organization, but mainly uses mesh organization. Moreover, the organizations used are not too complex, and the combined effects are not too layered, so as not to overshadow the main pattern effect. When the first guide needle is making the main pattern, the combination of organizations is richer, not limited to mesh organization or simple thick and thin organization, but making full use of the various effects that the first guide needle can form, and using them in combination to construct multi-layered, multi-style, and multi-effect main patterns. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of the present invention.

[0008] Figure 2 This is a schematic diagram of the yarn guide needle block.

[0009] Figure 3 This is a schematic diagram of a piezoelectric actuator.

[0010] Figure 4 This is the circuit diagram of the drive circuit. Detailed Implementation

[0011] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0012] Example 1, refer to Figure 1 A piezoelectric jacquard unit and a textile machine are disclosed. The textile machine includes at least one piezoelectric jacquard unit 1 and at least one power supply unit 2. The power supply unit 2 is alternatively installed on the power receiving terminal of the piezoelectric jacquard unit 1 and is used to transmit power signals or pattern data. The textile machine may be a warp knitting machine.

[0013] Reference Figure 1 The piezoelectric jacquard unit 1 includes at least a first jacquard device 3, at least one second jacquard device 4, at least one common base 5, a plurality of first needle position limiting parts 12 arranged on a part of the common base 5, a plurality of second needle position limiting parts 13 arranged on another part of the common base 5, a plurality of first mounting parts 9 arranged on a part of the common base 5, and a plurality of second mounting parts 10 arranged on another part of the common base 5.

[0014] Reference Figure 1 The first jacquard device 3 includes a plurality of first yarn guide needles 6 for jacquard yarn guiding and a plurality of first actuators 41. The second jacquard device 4 includes a plurality of second yarn guide needles 7 for jacquard yarn guiding and at least one second actuator 8.

[0015] Reference Figure 1 and Figure 2 The first actuator 41 drives the corresponding first guide needle 6 to oscillate, and each first guide needle 6 has at least X positions. The second actuator 8 drives the corresponding second guide needle 7 to oscillate, and each second guide needle 7 has at least Y positions, where X ≥ 3 and Y ≥ 2. There is a needle pitch between every two adjacent positions. The value of X is not equal to the value of Y.

[0016] Reference Figure 1 A plurality of first guide needles 6 are arranged together to form a first needle column, and a plurality of second guide needles 7 are arranged together to form a second needle column. When the first needle column is an even number of needle columns, the second needle column is an odd number of needle columns, and when the first needle column is an odd number of needle columns, the second needle column is an even number of needle columns.

[0017] Reference Figure 1 The first jacquard device 3 is alternatively provided on a part of the common base 5, and the second jacquard device 4 is alternatively provided on another part of the common base 5.

[0018] Reference Figure 1 and Figure 3 The first yarn guide needle 6 and the second yarn guide needle 7 are arranged opposite each other with the common base 5 as the center, so that the first yarn guide needle 6 is arranged on one side of the common base 5 and the second yarn guide needle 7 is arranged on the other side of the common base 5.

[0019] Reference Figure 1 By setting each first guide needle 6 to have at least X workstations and each second guide needle 7 to have at least Y workstations, where X≥3 and Y≥2, the number of workstations of the first guide needle 6 is increased to enrich the pattern styles. When the first guide needle 6 is making the patterned base mesh, it can use various organizational effects such as thick organization, thin organization, and mesh organization, but mainly uses mesh organization. Moreover, the organization used will not be too complex, and the combined effect will not have too many layers, so as not to overshadow the main pattern effect. When the first guide needle 6 is making the main pattern, the combination of organizations is richer. It is not limited to mesh organization or simple thick and thin organization, but makes full use of the various effects that the first guide needle 6 can form, and uses them in combination to construct multi-layered, multi-style, and multi-effect main patterns.

[0020] Example 2, refer to Figure 1 and Figure 2The difference between this second embodiment and the first embodiment is that when X is 3, the first actuator 41 includes a plurality of first piezoelectric Jacquard elements 20 arranged on a part of the common base 5, a first station 31, a second station 32 and a third station 33. The first station 31, the second station 32 and the third station 33 are respectively arranged between two corresponding first needle position limiting parts 12. The first station 31 is the first needle position of the first yarn guide needle 6, the third station 33 is the tail needle position of the first yarn guide needle 6, the second station 32 is the middle position between the first station 31 and the third station 33, and at least a part of the first yarn guide needle 6 is arranged to swing between two corresponding first needle position limiting parts 12.

[0021] Reference Figure 2 The distance between the first station 31 and the second station 32 is one stitch pitch, and the distance between the second station 32 and the third station 33 is one stitch pitch.

[0022] Reference Figure 2 When Y is 2, the second actuator 8 includes a plurality of second piezoelectric Jacquard elements 24 arranged on another part of the common base 5, a fourth station 34 and a fifth station 35. The fourth station 34 is the first needle position of the second yarn guide needle 7, and the fifth station 35 is the last needle position of the second yarn guide needle 7. The fourth station 34 and the fifth station 35 are respectively arranged between two corresponding second needle position limiting parts 13. At least a part of the second yarn guide needle 7 is arranged to swing between the two corresponding second needle position limiting parts 13.

[0023] Reference Figure 3 The first piezoelectric Jacquard element 20 includes a first substrate, a first piezoelectric ceramic sheet 21 wrapped on the first substrate, at least one first comb holding portion 22 disposed on the front of the first piezoelectric ceramic sheet 21, and two first conductive sheets 23 respectively disposed on the tail of the first piezoelectric ceramic sheet 21. A first yarn guide needle 6 is disposed on the front of the first comb holding portion 22. The first substrate can be a glass fiber sheet. When the first conductive sheet 23 is energized, the first piezoelectric ceramic sheet 21 deforms, thereby driving the first yarn guide needle 6 to swing. A portion of the first piezoelectric ceramic sheet 21 is installed in the first mounting portion 9.

[0024] Reference Figure 3 The second piezoelectric Jacquard element 24 includes a second substrate, a second piezoelectric ceramic sheet 25 wrapped around the second substrate, at least one second comb holding portion 26 disposed on the front portion of the second piezoelectric ceramic sheet 25, and two second conductive sheets 27 respectively disposed on the tail portion of the second piezoelectric ceramic sheet 25. A second yarn guide needle 7 is disposed on the front portion of the second comb holding portion 26. The second substrate can be a glass fiber sheet. When the second conductive sheet 27 is energized, the second piezoelectric ceramic sheet 25 deforms, thereby causing the second yarn guide needle 7 to oscillate. A portion of the second piezoelectric ceramic sheet 25 is installed within the second mounting portion 10.

[0025] Other structures are similar to those in Embodiment 1, and will not be described in detail here.

[0026] Example 3, refer to Figure 3 The difference between this third embodiment and the first embodiment is that when X is 4 and Y is 3, the first actuator 41 has a first station, a second station, a third station and a fourth station, and the second actuator 8 has a fifth station, a sixth station and a seventh station.

[0027] Reference Figure 3 The first station is the first needle position of the first guide needle 6, the fourth station is the last needle position of the first guide needle 6, the second station is located between the third station and the first station, the distance between the first station and the second station is one stitch length, the distance between the second station and the third station is one stitch length, the third station is located between the second station and the fourth station, and the distance between the third station and the fourth station is one stitch length.

[0028] Reference Figure 3 The fifth station is the first needle position of the second guide needle 7, the seventh station is the last needle position of the second guide needle 7, and the sixth station is located in the middle position between the fifth station and the seventh station. The distance between the fifth station and the sixth station is one stitch length, and the distance between the sixth station and the seventh station is one stitch length.

[0029] Other structures are similar to those in Embodiment 1, and will not be described in detail here.

[0030] Example 4, refer to Figure 1 , Figure 2 and Figure 3 The difference between this fourth embodiment and the first embodiment is that the first pin position limiting part 12 includes a plurality of first comb teeth 42 disposed on the front part of the common base 5, a plurality of piezoelectric actuators 43 that can swing independently, and a plurality of limiting parts 44 adapted to be disposed on the piezoelectric actuators 43. The distance between two adjacent first comb teeth 42 is two pin pitches.

[0031] Reference Figure 1 , Figure 2 and Figure 3 At least a portion of the limiting part 44 is displaced along the moving direction by being driven by the piezoelectric actuator 43. The piezoelectric actuator 43 is stacked above the first piezoelectric Jacquard element 20. The limiting part 44 extends into the space between the two first comb teeth 42. The limiting part 44 is used to block a portion of the first guide needle 6 from displacing along the moving direction. When a portion of the first guide needle 6 comes into contact with the limiting part 44 in a swinging manner, the needle position of the first guide needle 6 is restricted to one side of the limiting part 44 and stops swinging.

[0032] Reference Figure 1 , Figure 2 and Figure 3 By setting piezoelectric actuators 43 stacked above the first piezoelectric Jacquard element 20, and limiting part 44 extending into the space between the two first comb teeth 42, on the one hand, without affecting the existing swing of the first piezoelectric Jacquard element 20, the piezoelectric actuators 43 drive the limiting part 44 to swing, thereby not affecting the jacquard yarn guiding of the original two stations of the first yarn guide needle 6, maintaining the stability of the original swing of the first yarn guide needle 6. On the other hand, the limiting part 44 blocks the corresponding first yarn guide needle 6, so that the first yarn guide needle 6 stops swinging at the preset position of the limiting part 44, thereby achieving the effect of increasing the number of stations of the first yarn guide needle 6, achieving two benefits at once.

[0033] Reference Figure 1 , Figure 2 and Figure 3 Each pair of adjacent first comb teeth 42 surrounds a cavity for respectively accommodating the corresponding first yarn guide needle 6 and the corresponding limiting part 44. The left side of the cavity is the first station 31, the right side of the cavity is the third station 33, and the middle position of the cavity is the second station 32. The distance between the second station 32 and the third station 33 is one needle pitch. The limiting part 44 switches between the second station 32 and the third station 33 in a swinging manner. When the limiting part 44 stops swinging at the second station 32, the limiting part 44 prevents the corresponding first yarn guide needle 6 from stopping swinging at the corresponding second station 32. When the limiting part 44 stops at the third station 33, the limiting part 44 prevents the corresponding first yarn guide needle 6 from stopping swinging at the corresponding third station 33.

[0034] Reference Figure 1 , Figure 2 and Figure 3 By setting a limiting part 44 to switch back and forth between the second station 32 and the third station 33, the first needle position limiting part 12 can switch between the two stations and the three stations as needed, thereby increasing the applicability of the piezoelectric jacquard device and increasing the number of jacquard patterns.

[0035] Reference Figure 1 and Figure 3 In this embodiment, the width of the first guide needle 6 along the moving direction is greater than the width of the limiting part 44 along the moving direction. The limiting part 44 is arranged laterally and offset from the moving direction within the movement space of the first guide needle 6. Each limiting part 44 is held on a portion of the first comb tooth 42 at at least two different positions.

[0036] Reference Figure 1 and Figure 3The piezoelectric actuator 43 includes at least one deformable third substrate, third piezoelectric ceramic sheets 44 wrapped around both sides of the third substrate, and two third conductive sheets 45 disposed on both sides of the tail of the third substrate. A limiting portion 44 is disposed on the front of the third substrate, and the limiting portion 44 can be a pin stop sheet. The substrate can be a fiberglass board.

[0037] Reference Figure 1 and Figure 3 The third conductive sheet 45 is electrically connected to the third piezoelectric ceramic sheet 44. When the third conductive sheet 45 is energized, the third piezoelectric ceramic sheet 44 drives the stop pin sheet to swing together between the two first comb teeth 42. The length of the third piezoelectric ceramic sheet 44 is greater than the length of the first piezoelectric ceramic sheet 21.

[0038] Reference Figure 1 and Figure 3 By setting the length of the third piezoelectric ceramic sheet 44 to be greater than the length of the first piezoelectric ceramic sheet 21, the torque of the third piezoelectric ceramic sheet 44 is greater than the torque of the first piezoelectric ceramic sheet 21. This allows the needle-stopping sheet to effectively block the impact of the first yarn-guided needle 6 on the needle-stopping sheet, so that the first yarn-guided needle 6 can be intercepted by the needle-stopping sheet at the second station 32 or at the third station 33, thereby improving the stability and accuracy of the three-station switching process.

[0039] Reference Figure 1 and Figure 3 The common base 5 is provided with a plurality of third mounting parts 11 arranged in a row. The mounting position of the third piezoelectric ceramic sheet 44 on the corresponding third mounting part 11 is higher than the position of the first piezoelectric ceramic sheet 21 on the first mounting part 9.

[0040] Reference Figure 1 and Figure 3 By setting the installation position of the third piezoelectric ceramic sheet 44 on the third mounting part 11 to be higher than the position of the first piezoelectric ceramic sheet 21 on the first mounting part 9, the third piezoelectric ceramic sheet 44 after installation does not affect the original first piezoelectric Jacquard element 20. At the same time, it is also convenient to produce the common base 5 and improves the stability of the first pin position limiting part 12.

[0041] Reference Figure 1 , Figure 2 and Figure 3 As long as a sufficiently large torque is generated, the first guide needle 6 will be pressed tightly against the wall surface on one side of the first comb tooth 42 under the drive of the first piezoelectric ceramic plate 21, and will not be deflected by the yarn, thus accurately passing through the center of the two groove needles.

[0042] Reference Figure 1 , Figure 2 and Figure 3The first comb tooth 42 of the common base 5 has a first groove with a step 50 in its structure.

[0043] Reference Figure 1 , Figure 2 and Figure 3 The cavity has a width equal to two stitch lengths, the first groove has a width equal to one stitch length, and there is a step 50 between the cavity and the first groove.

[0044] Reference Figure 1 , Figure 2 and Figure 3 The first piezoelectric ceramic sheet 21 drives the first yarn guide needle 6 to swing in the cavity. The position of the first yarn guide needle 6 is higher than the step 50, so it is not affected by the step 50. Since the width of the cavity is the width of two needle pitches, the first piezoelectric ceramic sheet 21 drives the first yarn guide needle 6 to swing to a position of two needle pitches in the cavity.

[0045] Reference Figure 1 , Figure 2 and Figure 3 After the third piezoelectric ceramic plate 44 is installed, when the stop pin plate at the front end of the third piezoelectric ceramic plate 44 is running, since the lower part of the stop pin plate is in the first groove, the stop pin plate will be blocked by the step 50 and the tooth wall (the wall on the other side of the first comb tooth 42) when it swings. Therefore, the stop pin plate is restricted to swinging left and right only in the first groove. Since the first groove is set to a width of one pin pitch, the stop pin plate can swing left and right for one pin pitch within the first groove. Since the step 50 limits the stop pin plate, the stop pin plate can only swing between the step 50 and the rightmost tooth wall.

[0046] Reference Figure 1 , Figure 2 and Figure 3 The third piezoelectric ceramic sheet 44 is made longer in order to increase the torque of the third piezoelectric ceramic sheet 44. Due to the need to realize three stations, the torque of the third piezoelectric ceramic sheet 44 is set to be greater than the torque of the first piezoelectric ceramic sheet 21, so that the pushing force of the needle stop plate on the first yarn guide needle 6 is greater than the pressure of the first yarn guide needle 6 on the needle stop plate, thereby causing the needle stop plate to push the first yarn guide needle 6 from the third station 33 to the second station 32.

[0047] Reference Figure 1 , Figure 2 and Figure 3 The following explains how the first guide needle 6 works by switching between the three positions, described separately for left, center, and right: Reference Figure 1 , Figure 2 and Figure 3When the first guide needle 6 is on the left (first station 31): the drive circuit controls the first piezoelectric ceramic plate 21 to swing to the left, and the needle position is at the leftmost position (first station 31). At this time, the position of the needle stop plate can be any position, and it has no effect on the current leftmost needle position (first station 31).

[0048] Reference Figure 1 , Figure 2 and Figure 3 When the first guide needle 6 is in the middle (second station 32): the drive circuit controls the third piezoelectric ceramic plate 44 to make the needle stop plate swing to the left, and at the same time, controls the first guide needle 6 to swing to the right. At this time, the needle stop plate will be blocked by the step 50. Since the torque of the needle stop plate is greater than that of the first guide needle 6, the first guide needle 6 will press tightly on the needle stop plate, but will not push the needle stop plate away and cause needle deviation. So the final result is that the needle stop plate stops after being blocked by the step 50, and the first guide needle 6 presses on the needle stop plate. Since the position of the needle stop plate when it is against one side of the step 50 is exactly one needle pitch (i.e., the position of the second station 32), it is equivalent to the first guide needle 6 being in the middle station (i.e., the position of the second station 32).

[0049] Reference Figure 1 , Figure 2 and Figure 3 When the first guide needle 6 is on the right (third station 33): the drive circuit controls the first piezoelectric ceramic plate 21 to swing to the left, causing the first guide needle 6 to swing to the right. At the same time, it controls the needle stop plate in front of the third piezoelectric ceramic plate 44 to swing to the right. The first guide needle 6 is in the right position and presses on the needle stop plate. Since the width is preset during the initial milling of the first comb tooth 42, including the thickness of the needle stop plate, the position of the first guide needle 6 pressing on the needle stop plate is exactly one needle pitch. Therefore, the first guide needle 6 will be in the rightmost position (third station 33).

[0050] Reference Figure 1 , Figure 2 and Figure 3The piezoelectric ceramic sheet used at the needle stop plate (the second piezoelectric ceramic sheet 25 and the third piezoelectric ceramic sheet 44) has a larger torque than the piezoelectric ceramic sheet of the yarn guide needle (the first piezoelectric ceramic sheet 21), and at least twice as large. The reason is as follows: When the piezoelectric ceramic sheet with the yarn guide needle is confined to the intermediate station (the intermediate station is the second station 32), it is not without torque. If it had no torque, it would be pulled by the yarn, causing the needle position to shift. Therefore, the piezoelectric ceramic sheet with the yarn guide needle has a torque at the intermediate station. This torque causes the needle tip of the yarn guide needle to press against the needle stop plate. Assume the torque is 10 grams. If the torque of the piezoelectric ceramic plate with the needle stop is also 10 grams, then because the two are in opposite directions, their torques will cancel each other out. Under the pull of the yarn, the yarn will move towards the needle stop (the torque of the guide needle tip + the tension of the yarn > 10 grams). This means the needle stop cannot be fixed in place, leading to needle position deviation. However, if the torque of the needle stop is larger (at least twice that of the guide needle), the guide needle tip will not experience needle position deviation in either direction, allowing the needle to remain stable in the center position. Therefore, the piezoelectric ceramic plate with the needle stop is longer than that with the guide needle; a longer piezoelectric ceramic plate results in a larger torque.

[0051] Other structures are similar to those in Embodiment 1, and will not be described in detail here.

[0052] Example 5, refer to Figure 1 The difference between this fifth embodiment and the second embodiment is that the power supply unit 2 includes a first connector 60, a first cable 61 disposed on the input end of the first connector 60, a second connector 62, and a second cable 63 disposed on the input end of the second connector 62. The output end of the first connector 60 is pluggably mounted on the corresponding first conductive plate 23, and the output end of the second connector 62 is pluggably mounted on the corresponding second conductive plate 27. The first cable 61 is used to transmit power signals or pattern data, and the second cable 63 is used to transmit power signals or pattern data.

[0053] Other structures are similar to those in Embodiment 2, and will not be described in detail here.

[0054] Example 6, refer to Figure 1The difference between Embodiment Six and Embodiment Four is that the power supply unit 2 includes a first connector 60, a first cable 61 disposed on the input end of the first connector 60, a second connector 62, a second cable 63 disposed on the input end of the second connector 62, a third connector 64, and a third connector 65 disposed on the input end of the third connector 64. The output end of the first connector 60 is pluggably mounted on the corresponding first conductive plate 23, the output end of the second connector 62 is pluggably mounted on the corresponding second conductive plate 27, and the output end of the third connector 64 is pluggably mounted on the corresponding third conductive plate 45.

[0055] Reference Figure 1 The first cable 61 is used to transmit power signals or pattern data, the second cable 63 is used to transmit power signals or pattern data, and the third cable is used to transmit power signals or pattern data.

[0056] Other structures are similar to those in Embodiment 4, and will not be described in detail here.

[0057] Example 7, referring to Figure 4 The difference between Embodiment Six and Embodiment Four 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, a transistor Q4, and a Zener transistor D4. 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.

[0058] Reference Figure 4 One end of resistor R1 is connected to a signal input terminal INPUT, and the other end of resistor R1 is electrically connected to the base of transistor Q1. The collector of transistor Q1 is electrically connected to one end of resistor R2, and the other end of resistor R2 is electrically connected to the base of transistor Q2. The collector of transistor Q2, one end of resistor R3, the anode of diode D1, and the base of transistor Q3 are all connected together. One end of resistor R4, the cathode of diode D1, and the emitter of transistor Q3 are all connected together. The other end of resistor R4 is electrically connected to one end of the piezoelectric ceramic plate C1. The emitter of transistor Q1, the other end of resistor R3, the collector of transistor Q3, and the other end of the piezoelectric ceramic plate C1 are all connected together and grounded.

[0059] Reference Figure 4One end of the piezoelectric ceramic C2 of the 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 all connected together. One end of the resistor R6, the collector of the transistor Q4, and the collector of the transistor Q2 are all 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 all connected together. The cathode of the diode D3 is connected to the collector of the transistor Q1. The other end of the piezoelectric ceramic C2 and the other end of the piezoelectric ceramic C1 are grounded together.

[0060] The working principle of the drive circuit is as follows: Reference Figure 4 When the signal input terminal INPUT is high, transistor Q1 and transistor Q2 are turned on. Transistor Q2 charges the piezoelectric ceramic C1 through diode D1 and resistor R4. Due to the presence of diode D1, the base and emitter of transistor Q3 are reverse biased during charging, so transistor Q3 is turned off and piezoelectric ceramic C1 is charged. At the same time, piezoelectric ceramic C2 is discharged by transistor Q1 through resistor R5, D2, and D3. Due to the presence of D2, the base and emitter of transistor Q4 are reverse biased during the discharge of piezoelectric ceramic C2, so transistor Q4 is turned off and piezoelectric ceramic C2 discharges normally.

[0061] Reference Figure 4 When the signal input terminal INPUT is low, transistors Q1 and Q2 are both in the off state. At this time, piezoelectric ceramic C1 discharges through resistor R4, transistor Q3, and resistor R3. Since transistor Q1 is off, piezoelectric ceramic C2 is charged through transistor Q4 and resistor R6.

[0062] Reference Figure 4 Transistor Q1 is an NPN transistor, transistor Q2 is a PNP transistor, transistor Q3 is a PNP transistor, and resistor R4 is the piezoelectric ceramic C1.

[0063] Reference Figure 4 Transistor Q4 is an NPN transistor, resistor R6 is the bias resistor for transistor Q4, resistor R1 is the bias resistor for transistor Q1, resistor R2 is the bias resistor for transistor Q2, resistor R3 is the bias resistor for transistor Q3, and resistor R5 is the current-limiting resistor for the piezoelectric ceramic C2.

[0064] Advantages of this drive circuit: Only one input is needed to control the left and right oscillation of the piezoelectric ceramic plate. Compared to a drive circuit that requires two inputs, this reduces the number of signal input points by half, thereby reducing the wiring space and area of ​​the printed circuit board. If the input comes from a register, the number of registers can be reduced by half. For control devices such as MCUs, the reduction in signal input points by half means that devices with fewer pins, lower cost, and smaller size can be selected.

[0065] Reference Figure 4 The negative terminal of diode D4, the other end of piezoelectric ceramic C1, and the other end of piezoelectric ceramic C2 are connected together, and the positive terminal of diode D4 is grounded.

[0066] Reference Figure 4 Diode D4 is a Zener diode located between the common terminal of piezoelectric ceramics C1 and C2 and ground. Its main function is to generate a stable negative voltage when the piezoelectric ceramics are working. The generated negative voltage is equal to the Zener voltage Vd of diode D4. The working principle can be explained by the charging and discharging of piezoelectric ceramic C1: The common point of piezoelectric ceramics C1 and C2 is connected to diode D4, so the voltage at the common point is constant and equal to the Zener voltage Vd of diode D4. When piezoelectric ceramic C1 is charging, its voltage after charging is DC180 - Vd. When piezoelectric ceramic C1 is discharging, piezoelectric ceramic C2 is charging. Since the voltage at the common point of piezoelectric ceramics C1 and C2 is constant and equal to Vd, piezoelectric ceramic C1 will have a reverse voltage at this time. The common point is positive, and the side of resistor R4 discharging is 0, meaning a negative voltage of Vd is generated on piezoelectric ceramic C1. The principle for piezoelectric ceramic C2 is the same. Diode D4 acts as a passive negative voltage source. On the one hand, the presence of diode D4 reduces the forward voltage of the piezoelectric ceramic sheet during operation, thus significantly improving the service life of the piezoelectric ceramic sheet without affecting its torque. Furthermore, diode D4 itself is a passive component and will not produce any other adverse effects.

[0067] Reference Figure 4 By setting the Zener diode D4, the driving circuit has a built-in negative voltage function, eliminating the need for an additional negative voltage power supply.

[0068] Other structures are similar to those in Embodiment 4, and will not be described in detail here.

[0069] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A piezoelectric jacquard unit, characterized in that: It includes at least a first jacquard device, at least one second jacquard device, at least one common base, and a plurality of first needle position limiting parts arranged on a portion of the common base. The first jacquard device includes a plurality of first yarn guide needles for jacquard yarn guiding and a plurality of first actuators. The second jacquard device includes a plurality of second yarn guide needles for jacquard yarn guiding and at least one second actuator. The first actuator drives the corresponding first yarn guide needle to oscillate, and the second actuator drives the corresponding second yarn guide needle to oscillate. The plurality of first yarn guide needles are arranged together to form a first needle column, and the plurality of second yarn guide needles are arranged together to form a second needle column. When the first needle column is an even-numbered needle column, the second needle column is an odd-numbered needle column; when the first needle column is an odd-numbered needle column, the second needle column is an even-numbered needle column. Each first yarn guide needle has three working positions. The first pin position limiting part includes multiple first comb teeth disposed on the front part of the common base, multiple piezoelectric actuators that can swing independently, and multiple limiting parts adapted to be disposed on the piezoelectric actuators. The distance between two adjacent first comb teeth is two pin pitches. Every two adjacent first comb teeth form a cavity to accommodate the corresponding first guide needle and the corresponding limiting part, respectively. The left side of the cavity is the first working position, the right side is the third working position, and the middle position is the second working position. The distance between the second and third working positions is one needle pitch. The limiting part switches between the second and third working positions by oscillation. When the limiting part stops oscillating at the second working position, it prevents the corresponding first guide needle from stopping oscillating at the corresponding second working position. When the limiting part stops at the third working position, it prevents the corresponding first guide needle from stopping oscillating at the corresponding third working position. The first actuator includes a plurality of first piezoelectric Jacquard elements arranged on a portion of the common base. The first piezoelectric Jacquard element includes a first substrate, a first piezoelectric ceramic sheet wrapped on the first substrate, at least one first comb-holding portion disposed on the front portion of the first piezoelectric ceramic sheet, and two first conductive sheets respectively disposed on the tail portion of the first piezoelectric ceramic sheet. The piezoelectric actuator includes at least one deformable third substrate, third piezoelectric ceramic sheets wrapped around both sides of the third substrate, and two third conductive sheets disposed on both sides of the tail of the third substrate. A limiting part is disposed on the front of the third substrate, and the limiting part is a pin stop. The torque of the third piezoelectric ceramic sheet is greater than that of the first piezoelectric ceramic sheet. The first comb tooth of the common base has a stepped first groove. The width of the cavity is two pin pitches, and the width of the first groove is one pin pitch. There is a step between the cavity and the first groove. When the first guide needle is in the second position, the drive circuit controls the third piezoelectric ceramic plate to swing the needle stop plate to the left, and simultaneously controls the first guide needle to swing to the right. At this time, the needle stop plate will be blocked by the step. Since the torque of the needle stop plate is greater than that of the first guide needle, the needle stop plate stops after being blocked by the step, and the first guide needle presses on the needle stop plate. Since the position of the needle stop plate when it rests on one side of the step is exactly one needle pitch, it is equivalent to the first guide needle being in the middle position, i.e., the second position. When the first guide needle is in the third position, the drive circuit controls the first piezoelectric ceramic plate to swing to the left, causing the first guide needle to swing to the right. At the same time, it controls the needle stop plate in front of the third piezoelectric ceramic plate to swing to the right. The first guide needle is in the right position and presses on the needle stop plate. Since the width is preset during the initial milling of the first comb tooth groove, including the thickness of the needle stop plate, the position of the first guide needle pressing on the needle stop plate is exactly one needle pitch. Therefore, the first guide needle will be in the third position at this time.

2. The piezoelectric jacquard unit as described in claim 1, characterized in that: Each of the second guide needles has at least Y stations, where Y ≥ 2.

3. The piezoelectric jacquard unit as described in claim 1, characterized in that: The first jacquard tool may be alternatively disposed on a portion of the common base, and the second jacquard tool may be alternatively disposed on another portion of the common base.

4. The piezoelectric jacquard unit as described in claim 3, characterized in that: The first yarn guide needle and the second yarn guide needle are arranged opposite each other with the common base as the center, such that the first yarn guide needle is arranged on one side of the common base and the second yarn guide needle is arranged on the other side of the common base.

5. The piezoelectric jacquard unit as described in claim 2, characterized in that: It also includes a plurality of second needle position limiting parts arranged on another part of the common base. When Y is 2, the second actuator includes a plurality of second piezoelectric Jacquard elements arranged on another part of the common base, a fourth station and a fifth station. The fourth station is the first needle position of the second yarn guide needle, and the fifth station is the tail needle position of the second yarn guide needle. The fourth station and the fifth station are respectively arranged between two corresponding second needle position limiting parts, and at least a part of the second yarn guide needle is arranged to swing between two corresponding second needle position limiting parts.

6. A textile machine, characterized in that: The textile machinery has at least one piezoelectric Jacquard unit, wherein the piezoelectric Jacquard unit is the piezoelectric Jacquard unit of any one of claims 1-5.

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