Coil assembly and electronic expansion valve having the same

Abstract

The present application provides a coil assembly and an electronic expansion valve having the same, the coil assembly including a coil body, a pin structure having one end electrically connected to the coil body, and a lead wire, the lead wire including an insulating coating and a plurality of conductive wires, the insulating coating being wound around the outside of the conductive wires, the lead wire having a first connection end and a second connection end provided opposite to each other, the conductive wire of the first connection end being electrically connected to the other end of the pin structure, the conductive wire of the first connection end and an end of the pin structure being partially overlapped, and the lead wire of the first connection end and the pin structure being fixedly connected at the overlapping position. The technical aspects provided in the present application can solve the problem of poor contact between the lead wire and the pin in the electronic expansion valve in the prior art.

Description

[Technical field]

[0001] This application claims priority to a patent application filed with the China National Intellectual Property Office on April 24, 2022, bearing application number 202210434745.3 and titled "Coil assembly and electronic expansion valve having the same."

[0002] The present application relates to the technical field of electronic expansion valves, and in particular to a coil assembly and an electronic expansion valve having the same. [Background technology]

[0003] In the prior art, the coil assembly in the electronic expansion valve includes a coil body, an outgoing wire, and a pin, and both ends of the pin are electrically connected to the coil assembly and the outgoing wire, respectively. Specifically, the connection method of the outgoing wire in the coil assembly is usually a connection using a circuit board welding method, in which the outgoing wire is first connected to a circuit board and then the circuit board is connected to the pin, or a connection using a terminal and a connector, in which the outgoing wire is crimped with a terminal, the terminal is assembled to a connector, and then the connector is inserted into the pin. When the above method is adopted, the connection is unstable, and the outgoing wire and the pin are easily loosened due to long-term operation, vibration, and temperature changes of the electronic expansion valve, which causes poor contact, which affects the normal operation of the electronic expansion valve. Summary of the Invention

[0004] The present application provides a coil assembly and an electronic expansion valve having the same, which solves the problem in the prior art that poor contact between the lead wires and the pins in the electronic expansion valve is likely to occur.

[0005] According to one aspect of the present application, there is provided a coil assembly including a coil body, a pin structure having one end electrically connected to the coil body, and a lead wire, the lead wire including an insulating coating and a plurality of conductive wires, the insulating coating being wound around the outside of the conductive wires, the lead wire having a first connection end and a second connection end arranged opposite each other, the conductive wire of the first connection end being electrically connected to the other end of the pin structure, the conductive wire of the first connection end and an end of the pin structure partially overlapping each other, and the lead wire of the first connection end and the pin structure being fixedly connected at the overlapping position.

[0006] When the technical aspect of the present application is applied, one end of the pin structure is electrically connected to the coil body, the other end of the pin structure is electrically connected to the conductor of the first connection end of the lead wire, and the end of the pin structure and the conductor of the first connection end are partially overlapped, so that the pin structure and the conductor of the first connection end of the lead wire are directly connected. By adopting the above structure, the contact area where the two are connected can be increased, ensuring the stability of the connection between the pin structure and the lead wire, and preventing poor contact between the pin structure and the lead wire after long-term operation or due to external force. In addition, in the present application, the direct connection between the pin structure and the lead wire reduces the manufacturing process, simplifies the processing, makes it easy to assemble, and improves the assembly efficiency.

[0007] Furthermore, the coil assembly further includes a connection member provided between the lead wire and the pin structure, and fitted at a position where the first connection end and the pin structure overlap, the pin structure and the lead wire being fixed by the connection member. By providing in this manner, it is possible to reduce the number of manufacturing processes and parts, while at the same time ensuring the stability of the connection between the lead wire and the pin structure.

[0008] Furthermore, the conductive wire of the first connection end and the pin structure are welded and fixed at the overlapping position by adopting pressure welding or fusion welding, so that when welding the conductive wire and the pin structure, the welding method is simple, the welding process is easy to realize, and the resistance at the overlapping position of the conductive wire of the first connection end and the pin structure can be reduced, the temperature change impact resistance at the overlapping position can be improved, and the temperature at the overlapping position can be prevented from being too high, which affects the normal operation of the coil assembly.

[0009] Furthermore, one conductor wire includes multiple cores, and the multiple cores are fixedly connected to each other. By providing the conductor wires in this manner, it is possible to prevent different conductor wires from coming into contact with each other and causing a short circuit.

[0010] In addition, the wire cores of one conductor are welded and fixed by soldering, which allows the wire cores of the first connection end to be pre-processed by soldering and the separated wire cores to be fixed into an integral structure, preventing different conductors from coming into contact with each other and causing a short circuit, while simplifying the processing and facilitating processing of the wire cores.

[0011] Furthermore, the pin structure includes a pin, the pin has a connecting segment and a bent segment connected in sequence, an included angle is formed between the connecting segment and the bent segment, the connecting segment is electrically connected to the coil body, the bent segment is electrically connected to the conductor of the first connecting end, and the connecting member is fitted to the bent segment and the first connecting end. By having an included angle between the connecting end and the bent segment, it is possible to facilitate the electrical connection between the connecting segment and the coil body and the electrical connection between the bent segment and the conductor of the first connecting end, and to avoid interference between the coil body and the lead wire during the connection process, which affects the normal operation of the coil assembly.

[0012] Furthermore, the surface of the pin is provided with a groove structure, the extension direction of the groove structure is the same as that of the pin or forms an angle with that of the pin, and the wire at the first connection end is partially located in the groove structure. When the wire at the first connection end is connected to the pin, the wire at the first connection end is partially located in the groove structure, which can increase the connection strength between the wire at the first connection end and the pin and can also avoid poor contact between the lead wire and the pin structure.

[0013] Furthermore, the bent segments and the connecting segments are arranged perpendicular to each other, which makes it easier to process and manufacture the pin, and the bent segments and the connecting segments of the pin are arranged perpendicular to each other, which increases the range of application of the pin and increases the versatility of the pin.

[0014] Furthermore, the pin structure includes a plurality of pins, which are aligned in the same straight line, making it easier to attach the pins and to electrically connect the pins to the lead wires.

[0015] Furthermore, the pin structure includes a first pin unit and a second pin unit, the first pin unit includes a plurality of first pins arranged side by side, the second pin unit includes a plurality of second pins arranged side by side, the plurality of first pins and the plurality of second pins are located on different straight lines, and the plurality of first pins and the plurality of second pins are arranged alternately. By being able to position the first pin structure and the second pin structure on different straight lines, interference between the first pin unit and the second pin unit when they are connected to the lead-out line can be avoided, and electrical connection between the pin structure and the lead-out line can be easily established.

[0016] Furthermore, the pin structure includes a plurality of pins, the plurality of pins including at least one first pin and at least one second pin, and the length of the connection segment of the first pin is greater than the length of the connection segment of the second pin, thereby further avoiding interference when the first pin and the second pin are connected to the lead-out line, and facilitating electrical connection between the pin structure and the lead-out line.

[0017] According to another aspect of the present application, there is provided an electronic expansion valve including the coil assembly provided above. The electronic expansion valve using the coil assembly can avoid poor contact between the lead wire and the pin, ensure the normal operation of the electronic expansion valve, and at the same time, has a relatively short process flow and a relatively low manufacturing cost. [Brief description of the drawings]

[0018] The drawings in the specification that form a part of this application are intended to provide a further understanding of the application, and the schematic examples and the description thereof are intended to interpret the application and are not intended to unduly limit the application.

[0019] [Figure 1] FIG. 2 shows a cross-sectional view of a coil assembly provided according to Example 1 of the present application. [Diagram 2] A schematic diagram of the pin structure in FIG. 1 is shown. [Diagram 3] 1 shows a structural schematic diagram of a coil assembly provided in Example 1 of the present application. [Figure 4] FIG. 2 shows a structural schematic diagram of a coil assembly provided in accordance with Example 2 of the present application. [Diagram 5] FIG. 2 shows a structural schematic diagram of a coil assembly provided in accordance with Example 3 of the present application. [Figure 6] FIG. 1 shows a cross-sectional view of a coil assembly provided according to Example 4 of the present application. [Figure 7] FIG. 1 shows a structural schematic diagram of a coil assembly provided in accordance with Example 4 of the present application. [Figure 8]FIG. 1 shows a structural schematic diagram of a coil assembly provided in accordance with Example 5 of the present application. [Figure 9] FIG. 1 shows a structural schematic diagram of a coil assembly provided in accordance with Example 6 of the present application.

[0020] Here, the above drawings include the following reference numbers: 10 Coil body, 20 pin structure, 21 pin, 211 connection segment, 212 bent segment, 213 groove structure, 30 Lead wire, 31 First connection end, 40 Connection parts. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, the technical aspects of the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, but it is clear that the described embodiments are merely some of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is actually merely explanatory, and does not impose any restrictions on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present application.

[0022] As shown in Figures 1 to 3, a first embodiment of the present application provides a coil assembly including a coil body 10, a pin structure 20, and a lead wire 30, one end of the pin structure 20 being electrically connected to the coil body 10. The lead wire 30 includes an insulating coating and a plurality of conductive wires, and the insulating coating is wound around the outside of the conductive wires. The lead wire 30 has a first connection end 31 and a second connection end provided opposite to each other, the conductive wire of the first connection end 31 is electrically connected to the other end of the pin structure 20, and the conductive wire of the first connection end 31 and an end of the pin structure 20 are partially overlapped, and the conductive wire of the first connection end 31 and the pin structure 20 are fixedly connected at the overlapping position.

[0023] When the technical aspects of the present application are applied, one end of the pin structure 20 is electrically connected to the coil body 10, the other end of the pin structure 20 is electrically connected to the conductor of the first connection end 31 of the lead wire 30, and the end of the pin structure 20 and the conductor of the first connection end 31 partially overlap each other, thereby directly connecting the pin structure 20 and the conductor of the first connection end 31 of the lead wire 30. By adopting the above structure, the contact area where the two are connected can be increased to ensure the stability of the connection between the pin structure 20 and the lead wire 30, and poor contact between the pin structure 20 and the lead wire 30 after long-term operation or due to external force can be avoided. In the prior art, the pin structure 20 and the lead wire 30 are usually connected by adopting a connection method such as a connection plate or a terminal and a connector, but this makes the resistance of the pin structure 20 at the connection point between the connection plate or the terminal and the connector somewhat large, causing the connection point to heat up relatively quickly, increasing the risk of the coil assembly being burned, and at the same time, the connection method such as a connection plate or a terminal and a connector requires a relatively large number of manufacturing processes and a relatively large number of required parts, which increases the difficulty of assembly. In addition, in the present application, the pin structure 20 and the lead wire 30 are directly connected to each other, which reduces the manufacturing process, simplifies the processing, makes it easy to assemble, and improves the assembly efficiency. Here, one lead wire 30 includes multiple conductors, one end of the lead wire is connected to the coil body 10, and the other end of the lead wire is connected to another device.

[0024] Here, the coil assembly further includes a connecting member 40, which is provided between the lead wire 30 and the pin structure 20, and is fitted at a position where the first connection end 31 and the pin structure 20 overlap, and the pin structure 20 and the lead wire 30 are fixed by the connecting member 40. This arrangement can reduce the number of manufacturing processes and parts, while ensuring the stability of the connection between the lead wire 30 and the pin structure 20, making it easy to remove and install the lead wire 30 and the pin structure 20, and facilitating maintenance of the coil assembly.

[0025] Furthermore, one conductor wire includes multiple wire cores, and the multiple wire cores are fixedly connected to each other. This arrangement can prevent different conductor wires from contacting each other and causing a short circuit. Alternatively, a soldering method can be used to first pre-process the multiple conductor wires and fix the separated multiple conductor wires into an integrated structure, which can prevent different conductor wires from contacting each other and causing a short circuit, while at the same time simplifying the processing and facilitating processing of the wire cores.

[0026] Specifically, the pin structure 20 includes a pin 21, the pin 21 having a connecting segment 211 and a bent segment 212 connected in sequence, the connecting segment 211 and the bent segment 212 have an included angle therebetween, the connecting segment 211 is electrically connected to the coil body 10, the bent segment 212 is electrically connected to the conductor of the first connecting end 31, and the connecting member 40 is fitted into the bent segment 212 and the first connecting end 31. The included angle between the connecting end and the bent segment 212 facilitates the electrical connection between the connecting segment 211 and the coil body 10 and the electrical connection between the bent segment 212 and the conductor of the first connecting end 31, can avoid the interference between the coil body 10 and the lead wire 30 during the connection process that affects the normal operation of the coil assembly, and can reduce the volume of the coil assembly, making it easier to install and use the coil assembly later.

[0027] Furthermore, the surface of the pin 21 is provided with a groove structure 213, and the wire at the first connecting end 31 is partially located in the groove structure 213. Here, the extending direction of the groove structure 213 may be the same as the extending direction of the pin 21, or may form an included angle with the extending direction of the pin 21, and in this application, the extending direction of the groove structure 213 is the same as the extending direction of the pin 21. When the wire at the first connecting end 31 is connected to the pin 21, the wire at the first connecting end 31 is partially located in the groove structure 213, so as to increase the connection strength between the wire at the first connecting end 31 and the pin 21, and further to avoid poor contact between the lead wire 30 and the pin structure 20. Here, the cross section of the pin 21 may be circular or polygonal, and in this application, the cross section of the pin 21 is circular.

[0028] In this embodiment, the pin 21 has a plurality of annular side surfaces, each of which is provided with a groove structure 213, so that an operator can selectively place and fix the conductor of the first connecting end 31 in any one of the groove structures 213. Alternatively, the pin 21 may be provided with a plurality of groove structures 213, and the extending directions of the groove structures 213 and the pin 21 may be vertical. When an operator fixes and connects the conductor of the first connecting end 31 to the pin, the conductor of the first connecting end 31 is partially located in the groove structure 213, so that the connection strength between the conductor of the first connecting end 31 and the pin 21 can be improved.

[0029] Here, the bent segment 212 and the connecting segment 211 are arranged perpendicular to each other. This facilitates the processing and manufacturing of the pin 21, and the bent segment 212 and the connecting segment 211 of the pin 21 are arranged perpendicular to each other, thereby increasing the range of application of the pin 21 and increasing the versatility of the pin 21. Optionally, the orientation of the bent segment 212 may be determined according to the actual application situation, and may be arranged upward or downward, or may be arranged leftward or rightward.

[0030] 3, the pin structure 20 includes a plurality of pins 21, which are arranged on the same straight line. This facilitates attachment to the pins 21, and also facilitates electrical connection between the pins 21 and the lead wires 30.

[0031] 4, the second embodiment of the present application provides a coil assembly different from the first embodiment in that the pin structure 20 includes a unit of first pins 21 and a unit of second pins 21, the unit of first pins 21 includes a plurality of first pins 21 arranged side by side, the unit of second pins 21 includes a plurality of second pins 21 arranged side by side, the plurality of first pins 21 and the plurality of second pins 21 are located on different straight lines, and the plurality of first pins 21 and the plurality of second pins 21 are arranged alternately. Since the first pin structure 20 and the second pin structure 20 can be located on different straight lines, interference between the unit of first pins 21 and the unit of second pins 21 when they are connected to the lead wire 30 can be avoided, and electrical connection between the pin structure 20 and the lead wire 30 can be easily established.

[0032] As shown in Fig. 5, the third embodiment of the present application provides a coil assembly different from the first embodiment in that the pin structure 20 includes a plurality of pins 21, the plurality of pins 21 includes at least one first pin 21 and at least one second pin 21, and the length of the connection segment 211 of the first pin 21 is longer than the length of the connection segment 211 of the second pin 21. In this way, interference between the first pin 21 and the second pin 21 when they are connected to the lead wire 30 can be further avoided, and the electrical connection between the pin structure 20 and the lead wire 30 can be easily achieved. Here, the position of the pin 21 in the pin structure 20 and the length of the connection segment 211 may be determined according to the actual usage situation.

[0033] As shown in FIG. 6 and FIG. 7, the fourth embodiment of the present application provides a coil assembly different from the first embodiment in that the conductor of the first connection end 31 and the pin structure 20 are fixed at the overlapping position by using pressure welding or fusion welding. Alternatively, the conductor of the first connection end 31 and the pin structure 20 may be welded at the overlapping position by using ultrasonic welding among pressure welding. By providing in this way, when ultrasonically welding the conductor and the pin structure 20, the welding method is simple, the welding process is easy to realize, and the resistance at the overlapping position of the conductor of the first connection end 31 and the pin structure 20 can be reduced, the temperature change shock resistance performance at the overlapping position can be improved, and the temperature at the overlapping position can be prevented from being too high to affect the normal operation of the coil assembly. At the same time, the above structure can further reduce the use of parts and reduce the manufacturing cost, while ensuring the stability of the connection between the lead wire 30 and the pin structure 20 and avoiding poor contact between the lead wire 30 and the pin structure 20. Here, in this embodiment, the pin structure 20 includes a plurality of pins 21, which are aligned in the same line.

[0034] Furthermore, the conductive wires are welded and fixed by a soldering method. By providing in this manner, the conductive wires of the first connection end 31 are pre-processed by a soldering method, and the separated cores of the conductive wires are fixed into an integral structure, so that the conductive wires of different leads are prevented from contacting each other and causing a short circuit. The pre-processed conductive wires are further welded to the pin structure 20, which further ensures the normal operation of the coil assembly.

[0035] 8, the fifth embodiment of the present application provides a coil assembly different from the fourth embodiment in that the pin structure 20 includes a unit of first pins 21 and a unit of second pins 21, the unit of first pins 21 includes a plurality of first pins 21 arranged side by side, the unit of second pins 21 includes a plurality of second pins 21 arranged side by side, the plurality of first pins 21 and the plurality of second pins 21 are located on different straight lines, and the plurality of first pins 21 and the plurality of second pins 21 are arranged alternately. Since the first pin structure 20 and the second pin structure 20 can be located on different straight lines, interference between the unit of first pins 21 and the unit of second pins 21 when they are connected to the lead wire 30 can be avoided, and electrical connection between the pin structure 20 and the lead wire 30 can be facilitated.

[0036] As shown in Fig. 9, Example 6 of the present application provides a coil assembly different from Example 4 in that the pin structure 20 includes a plurality of pins 21, the plurality of pins 21 includes at least one first pin 21 and at least one second pin 21, and the length of the connection segment 211 of the first pin 21 is longer than the length of the connection segment 211 of the second pin 21. In this way, interference between the first pin 21 and the second pin 21 when they are connected to the lead wire 30 can be further avoided, and the electrical connection between the pin structure 20 and the lead wire 30 can be easily achieved. Here, the position of the pin 21 in the pin structure 20 and the length of the connection segment 211 may be determined according to the actual usage situation.

[0037] The electronic expansion valve provided in the seventh embodiment of the present application includes the coil assembly provided above. The electronic expansion valve using the coil assembly above can avoid poor contact between the lead wire 30 and the pin 21, ensure the normal operation of the electronic expansion valve, and at the same time, the process flow is relatively short and the manufacturing cost is relatively low. Here, the coil assembly further includes a housing and a potting material, the housing is fixedly connected to the outer periphery of the coil body 10, there is an accommodating chamber between the coil body 10 and the housing, the pin structure 20 is located in the accommodating chamber, and the potting material is filled in the accommodating chamber to seal the pin structure 20.

[0038] It should be noted that the terms used herein are merely for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form, and further, when the terms "comprise" and / or "comprise" are used herein, they should be understood to indicate the presence of features, steps, operations, devices, assemblies, and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangements, formulas and values ​​of the components and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for convenience of description, the dimensions of each part shown in the drawings are not drawn according to actual proportionality. Although the techniques, methods and equipment known to those skilled in the art are not discussed in detail, the described techniques, methods and equipment should be considered as part of the permitted specification, where appropriate. In all examples shown and discussed herein, any specific values ​​are merely illustrative and should not be construed as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar symbols and letters indicate similar elements in the following drawings, and therefore, once any element is defined in one drawing, it does not require further description in the subsequent drawings.

[0040] In the description of this application, the orientations or positional relationships indicated by directional terms such as "front", "rear", "up", "down", "left", "right", "lateral", "longitudinal", "vertical", "horizontal", "top", and "bottom" are generally orientations or positional relationships based on illustrations, and are merely for the convenience and simplification of the description of this application. Unless otherwise stated, these directional terms do not indicate or imply that a specified device or element has a particular orientation or must be constructed and operated in a particular orientation, and therefore should not be understood as limiting the scope of protection of this application. The directional terms "inside" and "outside" should be understood to mean the inside and outside of the contour of each member itself.

[0041] For ease of description, spatially relative terms such as "on," "above," "on top of," "on top of," and the like may be used herein to describe the spatial location of one illustrated device or feature relative to another. Spatially relative terms should be understood as intended to encompass different orientations of the device during use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is inverted, a device described as "above other devices or structures" or "on top of other devices or structures" would thereafter be positioned as "below other devices or structures" or "under other devices or structures." Thus, the exemplary term "above" may include both the "above" and "below" orientations. The device may be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein may be interpreted accordingly.

[0042] Furthermore, it should be explained that the use of words such as "first", "second", etc. to limit the components is merely for easily distinguishing corresponding components, and unless otherwise stated, the above-mentioned words do not have any special meaning, and therefore should not be understood as limiting the scope of protection of the present application.

[0043] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Those skilled in the art can make various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A coil body (10); A pin structure (20), one end of which is electrically connected to the coil body (10); a lead wire (30), the lead wire (30) including an insulating coating and a plurality of conductive wires, the insulating coating being wound around the outside of the conductive wires, the lead wire (30) having a first connection end (31) and a second connection end provided opposite to each other, the conductive wires of the first connection end (31) being electrically connected to the other end of the pin structure (20), the conductive wires of the first connection end (31) and an end of the pin structure (20) being partially overlapped, and the conductive wires of the first connection end (31) and the pin structure (20) being fixedly connected at the overlapping position; a coil assembly including:

2. 2. The coil assembly of claim 1, further comprising a connection member (40), the connection member (40) being provided between the lead wire (30) and the pin structure (20), the connection member (40) being engaged with the first connection end (31) and the pin structure (20) at a position where the first connection end (31) and the pin structure (20) overlap, and the pin structure (20) and the lead wire (30) being fixed by the connection member (40).

3. 2. The coil assembly according to claim 1, wherein the conductor of the first connection end (31) and the pin structure (20) are welded and fixed at the overlapping position by adopting pressure welding or fusion welding.

4. The coil assembly according to claim 1 or 3, wherein one of the conductor wires includes a plurality of wire cores, and the plurality of wire cores are fixedly connected to each other.

5. The coil assembly according to claim 4 , wherein the plurality of wire cores of the single conductor are welded and fixed by soldering.

6. 3. The coil assembly of claim 2, wherein the pin structure (20) includes a pin (21), the pin (21) having a connecting segment (211) and a bent segment (212) connected in series, the connecting segment (211) and the bent segment (212) having an included angle therebetween, the connecting segment (211) being electrically connected to the coil body (10), and the bent segment (212) being electrically connected to the conductor of the first connection end (31).

7. The coil assembly of claim 6, wherein the connecting member (40) is fitted to the bent segment (212) and the first connecting end (31).

8. 7. The coil assembly of claim 6, wherein the surface of the pin (21) is provided with a groove structure (213), the extension direction of the groove structure (213) is the same as the extension direction of the pin (21) or forms an angle with the extension direction of the pin, and the conductive wire at the first connection end (31) is partially located within the groove structure (213).

9. The coil assembly according to claim 6, wherein the bent segments (212) and the connecting segments (211) are disposed perpendicular to each other.

10. The coil assembly of claim 1 , wherein the pin structure (20) includes a plurality of pins (21), the plurality of pins (21) being collinear.

11. 2. The coil assembly of claim 1, wherein the pin structure (20) includes a unit of first pins (21) and a unit of second pins (21), the unit of first pins (21) includes a plurality of first pins (21) arranged side by side, the unit of second pins (21) includes a plurality of second pins (21) arranged side by side, the plurality of first pins (21) and the plurality of second pins (21) are located on different straight lines, and the plurality of first pins (21) and the plurality of second pins (21) are arranged alternately.

12. 7. The coil assembly of claim 6, wherein the pin structure (20) includes a plurality of the pins (21), the plurality of pins (21) including at least one first pin (21) and at least one second pin (21), and a length of a connecting segment (211) of the first pin (21) is greater than a length of a connecting segment (211) of the second pin (21).

13. An electronic expansion valve comprising a coil assembly according to any one of claims 1 to 12.

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