Coil component and electronic expansion valve

Abstract

A coil component and an electronic expansion valve, the coil component comprising a stator assembly (10), a wire assembly (20) and a fixing frame (30), wherein the stator assembly (10) is provided with a plurality of pins (11), the pins (11) being in limiting fit with the fixing frame (30) thus defining the positions of the pins (11); the wire assembly (20) is provided with a plurality of wires (21), the wires (21) being in limiting fit with the fixing frame (30) thus defining the positions of the wires (21); and the wires (21) are electrically connected to corresponding pins (11).

Description

Coil components and electronic expansion valves

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of China on September 28, 2023, with application number 202311296162X and titled “Coil Component and Electronic Expansion Valve.” Technical Field

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

[0003] In coil components, multiple pins in the stator assembly and multiple wires in the wire assembly must be fixedly connected to achieve electrical connection. Due to the large number of pins and wires, and their close spacing, it's difficult to align the wires with the correct pins during connection. Furthermore, there's a risk of loosening and shifting the positions of the wires and pins after connection, leading to a time-consuming connection process and high product defect rates. Therefore, existing coil components need to be optimized to precisely define the relative positions of the pins and wires.

[0004] Application Contents

[0005] The present application provides a coil component and an electronic expansion valve to accurately define the relative positions of pins and wires, thereby simplifying connection operations and reducing product defective rates.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, the present application provides a coil component, including a stator assembly, a wire assembly and a fixing frame, the stator assembly has a plurality of pins, the pins and the fixing frame are limited to limit the position of the pins, the wire assembly has a plurality of wires, the wires and the fixing frame are limited to limit the position of the wires, and the wires are electrically connected to the corresponding pins.

[0007] Furthermore, the fixing frame has a first limiting structure, a second limiting structure and a connection area, and the connection area is located between the first limiting structure and the second limiting structure; wherein the first limiting structure cooperates with the pin limiting structure, and the second limiting structure cooperates with the wire limiting structure, and the end of the pin and the end of the wire are located in the connection area and are electrically connected.

[0008] Furthermore, the first limiting structure includes a plurality of jacks arranged side by side, and the plurality of pins pass through the plurality of jacks in a one-to-one correspondence.

[0009] Furthermore, the connection area has a plurality of ribs, which separate the ends of two adjacent pins and / or separate the ends of two adjacent wires.

[0010] Furthermore, multiple pins and multiple ribs are arranged side by side, and the multiple pins and multiple wires are electrically connected one-to-one; wherein, the number of ribs is greater than the number of pins, and each pin is located between two adjacent ribs; or, the number of ribs is less than or equal to the number of pins, and there is at least one rib between any two adjacent pins.

[0011] Alternatively, multiple pins and multiple ribs are arranged side by side, the number of wires is less than the number of pins, and the number of ribs is less than or equal to the number of pins; wherein, at least two pins are electrically connected to one wire, and no rib is arranged between at least two pins electrically connected to one wire.

[0012] Furthermore, the connection area has a plurality of connection through holes, the axial direction of the connection through holes is perpendicular to the extension direction of the pin ends, and the ends of the pins and the ends of the wires connected thereto are located in the same connection through hole.

[0013] Alternatively, the connection area has multiple connection grooves, the opening direction of the connection grooves is perpendicular to the extension direction of the pin end, the end of the pin and the end of the wire connected to it are located in the same connection groove, and the bottom wall of the connection groove is separated from the pin end and the wire end.

[0014] Furthermore, the first limiting structure includes a plurality of jacks arranged side by side, the pins pass through the corresponding jacks, and the depth of the connecting groove exceeds the bottom surface of the inner wall of the jack so that the pins are suspended in the connecting groove.

[0015] Furthermore, the second limiting structure includes a plurality of mounting holes arranged side by side, the extending direction of the mounting holes is toward the connection area, and each wire passes through a mounting hole.

[0016] Alternatively, the second limiting structure includes a plurality of mounting slots arranged side by side, the extending direction of the mounting slots is toward the connection area, and each wire is inserted into one mounting slot.

[0017] Furthermore, the first limiting structure includes a plurality of limiting slots arranged side by side, and the plurality of pins pass through the plurality of limiting slots in a one-to-one correspondence. Partition ribs are provided between two adjacent limiting slots, and the partition ribs separate the adjacent pins.

[0018] Furthermore, the first limiting structure also includes a plurality of sockets arranged side by side, and there is an angle between the extension direction of the sockets and the extension direction of the limiting slots, and the plurality of sockets and the plurality of limiting slots are connected one by one; the surface of the fixing frame abuts the surface of the exposed pins of the stator assembly, and the pins include a first section and a second section that are connected to each other, and there is an angle between the first section and the second section, wherein the first section is located in the limiting slot and does not protrude from the limiting slot, and the second section passes through the sockets.

[0019] Furthermore, the fixing frame is an integral structure formed by injection molding.

[0020] Furthermore, the coil component also includes an injection-molded encapsulation layer, and the stator assembly is encapsulated in the encapsulation layer; the fixing frame is encapsulated in the encapsulation layer, or the fixing frame is located outside the encapsulation layer.

[0021] According to another aspect of the present application, an electronic expansion valve is provided. The electronic expansion valve includes a valve body and the above-mentioned coil component, and the coil component is sleeved on the valve body.

[0022] The technical solution of the present application provides a coil component comprising a stator assembly, a wire assembly, and a mounting bracket. The stator assembly comprises a plurality of pins, which cooperate with the mounting bracket to define the positions of the pins. The wire assembly comprises a plurality of wires, which cooperate with the mounting bracket to define the positions of the wires. The wires are electrically connected to the corresponding pins. In this solution, the pins and wires are first limited in the mounting bracket, and the wires are first limited in the mounting bracket. This defines the positions of the pins and wires, and achieves a correspondence between the positions of the pins and wires, thereby accurately defining the relative positions of the pins and wires. The wires are then electrically connected to the corresponding pins, achieving efficient and accurate operation, thereby simplifying the connection operation and reducing product defect rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0024] FIG1 shows a schematic structural diagram of a coil component provided in Example 1 of the present application;

[0025] FIG2 shows a front view of FIG1 ;

[0026] FIG3 shows a schematic structural diagram of a coil component provided in Example 2 of the present application;

[0027] FIG4 shows a front view of the fixing frame in the coil component of the third embodiment;

[0028] FIG5 shows a cross-sectional view of FIG4;

[0029] FIG6 shows a front view of a fixing frame in the coil component of the fourth embodiment;

[0030] FIG7 shows a cross-sectional view of FIG6;

[0031] FIG8 shows a front view of the fixing frame in the coil component of the fifth embodiment;

[0032] FIG9 shows a cross-sectional view of FIG8;

[0033] FIG10 shows a front view of a fixing frame in the coil component of the sixth embodiment;

[0034] FIG11 shows a cross-sectional view of FIG10;

[0035] FIG12 shows a front view of the fixing frame in the coil component of the seventh embodiment;

[0036] FIG13 shows a front view of the fixing frame in the coil component of the eighth embodiment;

[0037] FIG14 shows a cross-sectional view of FIG13;

[0038] FIG15 shows a front view of a fixing frame in the coil component of the ninth embodiment;

[0039] FIG16 shows a cross-sectional view of FIG15;

[0040] FIG17 shows a schematic structural diagram of a coil component provided in Example 10 of the present application;

[0041] FIG18 shows a schematic structural diagram of the fixing frame in FIG17 ;

[0042] FIG. 19 shows a cross-sectional view of FIG. 18 .

[0043] Among them, the above drawings include the following figure marks: 10, stator assembly; 11, pin; 20, wire assembly; 21, wire; 30, fixing frame; 31, socket; 32, retaining rib; 33, connecting through hole; 34, connecting groove; 35, mounting hole; 36, mounting groove; 37, limiting groove; 38, partition rib; 40, encapsulation layer. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0045] As shown in Figures 1 to 19, the present application provides a coil component, including a stator assembly 10, a wire assembly 20 and a fixing frame 30. The stator assembly 10 has a plurality of pins 11, each of which is limited by the fixing frame 30 to define the position of the pin 11. The wire assembly 20 has a plurality of wires 21, each of which is limited by the fixing frame 30 to define the position of the wire 21. The wires 21 are electrically connected to the corresponding pins 11.

[0046] In this solution, the pins 11 and wires 21 are first positioned and engaged with the mounting bracket 30, thereby defining the positions of the pins 11 and wires 21 and ensuring their alignment. This accurately defines the relative positions of the pins 11 and wires 21, and then the wires 21 are electrically connected to the corresponding pins 11, achieving efficient and accurate operation. Therefore, this solution, through the arrangement and assembly of the mounting bracket 30, simplifies the connection operation and reduces product defect rates.

[0047] Among the multiple pins 11 in the stator assembly 10, if one pin 11 serves as a ground pin, it can be positioned directly with the housing of the stator assembly 10 without being restrained by the mounting bracket 30. In this case, it is not necessary for every pin 11 in the stator assembly 10 to be restrained by the mounting bracket 30. When a pin 11 serves as a ground pin, it cannot be electrically connected to the winding (i.e., the enameled wire). The other pins 11 that are electrically connected to the winding are restrained by the mounting bracket 30.

[0048] In some existing coil components, the wires and pins are aligned and connected through a circuit board or a special terminal. The use of a circuit board or a special terminal is relatively expensive. Through this solution, the relative position of the pin 11 and the wire 21 can be accurately defined without using a circuit board or a special terminal, thereby achieving efficient operation.

[0049] The fixing frame 30 has a first limiting structure, a second limiting structure, and a connection area, with the connection area located between the first and second limiting structures. The first limiting structure cooperates with the pin 11, and the second limiting structure cooperates with the wire 21. The ends of the pin 11 and the wire 21 are positioned in the connection area and electrically connected. Once the first limiting structure and the pin are in position, and the second limiting structure and the wire 21 are in position, the ends of the pin 11 and the wire 21 are positioned in the connection area, ensuring alignment between the pin 11 and the wire 21. Electrical connection can then be made, enabling fast and accurate operation. After the electrical connection is complete, the fixing frame 30 maintains its limiting function, even if the coil assembly is moved or injection molding is performed, ensuring that the relative positions of the pin 11 and the wire 21 do not change.

[0050] The electrical connection between the pin 11 and the wire 21 can be achieved by soldering, direct riveting, or riveting together using a simple terminal, or by crimping, or by welding.

[0051] In this embodiment, the first limiting structure includes a plurality of jacks 31 arranged side by side, and the plurality of pins 11 pass through the plurality of jacks 31 in a one-to-one correspondence. In this way, the plurality of jacks 31 are used to limit the position of each pin 11, and the arrangement and relative positions of the plurality of pins 11 are defined.

[0052] As shown in Figure 4, the connection area has multiple ribs 32 that separate the ends of two adjacent pins 11 and / or the ends of two adjacent wires 21. The spacing of the ribs 32 not only facilitates the alignment and connection of the pins 11 and wires 21, but also insulates adjacent pins 11.

[0053] In this embodiment, multiple pins 11 and multiple ribs 32 are arranged side by side, and the pins 11 and the wires 21 are electrically connected in a one-to-one correspondence. The number of ribs 32 is greater than the number of pins 11, and each pin 11 is located between two adjacent ribs 32. Alternatively, the number of ribs 32 is less than or equal to the number of pins 11, and there is at least one rib 32 between any two adjacent pins 11. In these embodiments, each pin 11 is separated by a rib 32, which provides good insulation between the pins 11.

[0054] Of course, the retaining ribs 32 may not be provided at some locations to save materials. For example, in FIG. 12 , the retaining ribs 32 may not be provided at both ends of the fixing frame 30 .

[0055] As shown in Figures 13 to 16 , in some embodiments, multiple pins 11 and multiple ribs 32 are arranged side by side, the number of wires 21 is less than the number of pins 11, and the number of ribs 32 is equal to or less than the number of pins 11. At least two pins 11 are electrically connected to a single wire 21, and no rib 32 is provided between at least two pins 11 electrically connected to a single wire 21. This also saves material and prevents the ribs 32 from hindering the connection between the wire 21 and the multiple pins 11.

[0056] As shown in Figures 9, 11, and 16, in some embodiments, the connection region has multiple connection through-holes 33. The axial direction of the connection through-holes 33 is perpendicular to the extension direction of the end of the pin 11. The end of the pin 11 and the end of the wire 21 connected thereto are located within the same connection through-hole 33. The connection through-holes 33 not only accommodate the ends of the pin 11 and the ends of the wire 21, but also divide and limit the multiple pins 11 and the multiple wires 21.

[0057] As shown in Figures 5, 7, and 14, in some embodiments, the connection region has multiple connection slots 34. The opening direction of the connection slots 34 is perpendicular to the extension direction of the end of the pin 11. The end of the pin 11 and the end of the wire 21 connected thereto are located in the same connection slot 34. The bottom wall of the connection slot 34 is spaced from the ends of the pin 11 and the ends of the wire 21. The connection slots 34 not only accommodate the ends of the pin 11 and the ends of the wire 21, but also divide and limit the multiple pins 11 and the multiple wires 21.

[0058] Furthermore, the first retaining structure includes a plurality of juxtaposed insertion holes 31, through which the pins 11 pass. The depth of the connecting slots 34 exceeds the bottom of the inner wall of the insertion holes 31, so that the pins 11 are suspended in the connecting slots 34. Thus, the bottom wall of the connecting slots 34 is spaced from the ends of the pins 11 and the ends of the wires 21, thus preventing interference between the inner wall of the connecting slots 34 and the ends of the pins 11 and the ends of the wires 21.

[0059] In this embodiment, a connecting through-hole 33 or a connecting slot 34 is provided at the connection point between the pin 11 and the wire 21 in the fixing frame 30. When providing the connecting slot 34, the depth of the connecting slot 34 needs to exceed the distance to the lowest surface of the socket 31, mainly to allow the pin 11 to be suspended in the connecting slot 34. Compared with the connecting through-hole 33, the connecting slot 34 can effectively prevent metal impurities generated during the electrical connection between the wire 21 and the pin 11 from falling to other places and causing poor product performance.

[0060] As shown in Figures 7, 11, 14, and 16, in some embodiments, the second limiting structure includes multiple mounting holes 35 arranged side by side. The mounting holes 35 extend toward the connection area, and each wire 21 passes through a mounting hole 35. In this way, each wire 21 can be limited and sorted by multiple mounting holes 35, facilitating the connection operation and improving connection reliability.

[0061] As shown in Figures 5 and 9, in some embodiments, the second limiting structure includes a plurality of mounting slots 36 arranged side by side, the mounting slots 36 extending toward the connection area, and each wire 21 is snapped into a mounting slot 36. The plurality of mounting slots 36 can also limit and sort the wires 21.

[0062] As shown in Figures 17 to 19, in some embodiments, the first retaining structure includes a plurality of side-by-side retaining slots 37, through which the plurality of pins 11 pass in a one-to-one correspondence. A partitioning rib 38 is provided between adjacent retaining slots 37, separating adjacent pins 11. In this manner, the plurality of retaining slots 37 can be used to retain the plurality of pins 11, and the partitioning rib 38 can be used to separate adjacent pins 11, achieving an insulating effect. The retaining slots 37 are located at the ends of the fixing frame 30.

[0063] Specifically, the first limiting structure further includes a plurality of juxtaposed insertion holes 31, with the extension direction of the insertion holes 31 and the extension direction of the limiting slots 37 forming an angle, and the plurality of insertion holes 31 and the plurality of limiting slots 37 being in one-to-one communication. The surface of the fixing frame 30 abuts against the surface of the stator assembly 10 where the pins 11 are exposed. The pins 11 include a first and second interconnected section, each section forming an angle, wherein the first section is located within the limiting slots 37 and does not protrude therefrom, and the second section passes through the insertion holes 31. The surface of the stator assembly 10 where the pins 11 are exposed may be the surface of the stator assembly 10's housing, or the exposed surface of an injection-molded encapsulation layer within the stator assembly 10.

[0064] Through the above design, the limiting groove 37 and the insertion hole 31 in the fixing frame 30 jointly achieve good positioning and spacing of the first and second sections of the pin 11 exposed outside the stator assembly 10, ensuring assembly accuracy and insulation effect.

[0065] In this embodiment, the fixing frame 30 is an integral structure formed by injection molding. Injection molding is cost-effective. The fixing frame 30 is made of plastic, which has an insulating effect.

[0066] In this embodiment, the coil component further includes an injection-molded encapsulation layer 40, within which the stator assembly 10 is encapsulated; and the retaining frame 30 is either encapsulated within the encapsulation layer 40 or located outside the encapsulation layer 40. Specifically, as shown in Figures 1 to 3 , the retaining frame 30 can be installed before the encapsulation layer 40 is injection-molded, and then subsequently injection-molded. After the encapsulation layer 40 is injection-molded, the retaining frame 30 can be encapsulated therewith. Alternatively, the retaining frame 30 can be installed after the encapsulation layer 40 is injection-molded, leaving it exposed outside the encapsulation layer 40.

[0067] This application also provides an electronic expansion valve, comprising a valve body and the aforementioned coil assembly, which is sleeved onto the valve body. In this solution, the pins 11 and wires 21 are first positioned so as to be engaged with the mounting bracket 30, and the wires 21 are then engaged with the mounting bracket 30. This defines the positions of the pins 11 and wires 21, ensuring alignment between the pins 11 and wires 21, thereby accurately defining their relative positions. The wires 21 are then electrically connected to the corresponding pins 11, achieving efficient and accurate operation. Therefore, through the arrangement and assembly of the mounting bracket 30, this solution simplifies connection operations and reduces product defect rates.

[0068] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A coil component, characterized in that: The invention comprises a stator assembly (10), a wire assembly (20) and a fixing frame (30), wherein the stator assembly (10) has a plurality of pins (11), wherein the pins (11) and the fixing frame (30) are limited in position to define the positions of the pins (11), and the wire assembly (20) has a plurality of wires (21), wherein the wires (21) and the fixing frame (30) are limited in position to define the positions of the wires (21), and the wires (21) are electrically connected to the corresponding pins (11).

2. The coil component according to claim 1, characterized in that The fixing frame (30) has a first limiting structure, a second limiting structure and a connection area, and the connection area is located between the first limiting structure and the second limiting structure; wherein the first limiting structure and the plug pin (11) are in limiting cooperation, and the second limiting structure and the wire (21) are in limiting cooperation, and the end of the plug pin (11) and the end of the wire (21) are located in the connection area and are electrically connected.

3. The coil component according to claim 2, characterized in that The first limiting structure comprises a plurality of insertion holes (31) arranged side by side, and the plurality of insertion pins (11) pass through the plurality of insertion holes (31) in a one-to-one correspondence.

4. The coil component according to claim 2, characterized in that The connection area has a plurality of retaining ribs (32), and the retaining ribs (32) space the ends of two adjacent pins (11) and / or space the ends of two adjacent wires (21).

5. The coil component according to claim 4, characterized in that The plurality of plug pins (11) and the plurality of retaining ribs (32) are arranged side by side, respectively, and the plurality of plug pins (11) and the plurality of conducting wires (21) are electrically connected in a one-to-one correspondence; wherein: The number of the retaining ribs (32) is greater than the number of the plug pins (11), and each of the plug pins (11) is located between two adjacent retaining ribs (32); or, The number of the retaining ribs (32) is less than or equal to the number of the plug pins (11), and there is at least one retaining rib (32) between any two adjacent plug pins (11).

6. The coil component according to claim 4, characterized in that A plurality of the plug pins (11) and a plurality of the retaining ribs (32) are arranged side by side, respectively; the number of the wires (21) is less than the number of the plug pins (11); and the number of the retaining ribs (32) is less than or equal to the number of the plug pins (11); wherein at least two of the plug pins (11) are electrically connected to one of the wires (21), and the retaining ribs (32) are not arranged between at least two of the plug pins (11) that are electrically connected to one of the wires (21).

7. The coil component according to claim 2, characterized in that: The connection area has a plurality of connection through holes (33), the axial direction of the connection through holes (33) is perpendicular to the extension direction of the end of the plug pin (11), and the end of the plug pin (11) and the end of the wire (21) connected thereto are located in the same connection through hole (33).

8. The coil component according to claim 2, characterized in that: The connection area has a plurality of connection grooves (34), the opening direction of the connection grooves (34) is perpendicular to the extension direction of the end of the plug pin (11), the end of the plug pin (11) and the end of the wire (21) connected thereto are located in the same connection groove (34), and the bottom wall of the connection groove (34) and the end of the plug pin (11) and the end of the wire (21) are spaced apart.

9. The coil component according to claim 8, characterized in that The first limiting structure comprises a plurality of plug holes (31) arranged side by side, the plug pin (11) passes through the corresponding plug holes (31), and the depth of the connecting groove (34) exceeds the bottommost surface of the inner wall of the plug hole (31), so that the plug pin (11) is suspended in the connecting groove (34).

10. The coil component according to claim 2, characterized in that: The second limiting structure comprises a plurality of mounting holes (35) arranged side by side, the mounting holes (35) extending in a direction toward the connection area, and each of the wires (21) passing through one of the mounting holes (35).

11. The coil component according to claim 2, characterized in that: The second limiting structure comprises a plurality of installation slots (36) arranged side by side, the extension direction of the installation slots (36) being towards the connection area, and each of the wires (21) being inserted into one of the installation slots (36).

12. The coil component according to claim 2, characterized in that The first limiting structure comprises a plurality of limiting grooves (37) arranged side by side, and the plurality of insertion pins (11) pass through the plurality of limiting grooves (37) in a one-to-one correspondence. A partition rib (38) is arranged between two adjacent limiting grooves (37), and the partition rib (38) separates adjacent insertion pins (11).

13. The coil component according to claim 12, characterized in that The first limiting structure further comprises a plurality of jacks (31) arranged side by side, an angle being formed between an extension direction of the jacks (31) and an extension direction of the limiting groove (37), and the plurality of jacks (31) and the plurality of limiting grooves (37) are connected in a one-to-one correspondence; a surface of the fixing frame (30) abuts against a surface of the stator assembly (10) through which the plug pin (11) is exposed, and the plug pin (11) comprises a first section and a second section connected to each other, an angle being formed between the first section and the second section, wherein the first section is located in the limiting groove (37) and does not protrude from the limiting groove (37), and the second section passes through the jack (31).

14. The coil component according to claim 1, characterized in that The fixing frame (30) is an integral structure formed by injection molding.

15. The coil component according to claim 1, characterized in that The coil component further comprises an injection-molded encapsulation layer (40), the stator assembly (10) being encapsulated in the encapsulation layer (40); the fixing frame (30) being encapsulated in the encapsulation layer (40), or the fixing frame (30) being located outside the encapsulation layer (40).

16. An electronic expansion valve, characterized in that: The electronic expansion valve comprises a valve body and a coil component according to any one of claims 1 to 15, wherein the coil component is sleeved on the valve body.

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