An electrode terminal self-positioning capacitor

Abstract

The application relates to an electrode terminal self-positioning capacitor, and belongs to the technical field of capacitors. The capacitor comprises a capacitor body, electrode terminals extending out of the capacitor body for wiring, a positioning sleeve surrounding the capacitor body, the positioning sleeve covering the capacitor body and being coaxially arranged with the capacitor body, a buckle plate slidingly arranged on the inner wall of the positioning sleeve, the buckle plate being capable of rotating with the axis of the positioning sleeve as the center, a through hole arranged on the buckle plate, a port hole arranged in a fixing piece, the port hole being in communication with the through hole, the fixing piece being fixed on the buckle plate, and the electrode terminals sequentially penetrating through the through hole and the port hole and being arranged in the fixing piece so that the electrode terminals are limited by the through hole. The application improves the defects that the positioning of the electrode terminals relative to the capacitor body depends on external tooling, the assembly efficiency is low, and the electrode terminals are prone to position deviation during assembly and pouring.

Description

Technical Field

[0001] This application relates to the field of capacitors, and more particularly to a capacitor with self-positioning electrode terminals. Background Technology

[0002] A capacitor typically consists of a capacitor body and electrode terminals extending from the ends of the capacitor body. The electrode terminals are used to connect to external circuits, electrode connectors, or device terminals. Therefore, the positional accuracy of the electrode terminals relative to the capacitor body directly affects the ease of insertion, connection stability, and overall product consistency during subsequent assembly.

[0003] Reference Figure 5 In the current assembly process of capacitor 100, in order to ensure a relatively fixed positional relationship between the electrode terminals and the capacitor body, it is usually necessary to use an external positioning fixture to limit the electrode terminals. In specific assembly, the capacitor body is usually placed in the positioning fixture first, and then the protrusion position, spacing and angle relative to the shell of the electrode terminals are adjusted by the positioning fixture. After the electrode terminals reach the preset position, subsequent fixing or potting operations are performed.

[0004] The aforementioned method of using external positioning fixtures still has certain shortcomings. On the one hand, the positioning fixtures need to be clamped, adjusted, and disassembled separately, resulting in numerous assembly steps and making it difficult to improve capacitor production efficiency. On the other hand, the positioning fixtures are prone to wear or positioning reference shift after long-term use. In addition, factors such as placement and adjustment errors during manual operation can easily lead to poor consistency in the relative position between the electrode terminals and the capacitor body.

[0005] Especially in capacitors where assembly reliability is critical, if the electrode terminals shift during assembly or potting, it not only affects the alignment accuracy between the electrode terminals and the external connection structure, but may also lead to increased installation stress, package misalignment, or decreased product consistency, thereby impacting the capacitor's production yield and reliability. Regarding the aforementioned technologies, the inventors believe that the positioning of the electrode terminals relative to the capacitor body relies on external tooling, resulting in low assembly efficiency and a high risk of positional shift of the electrode terminals during assembly and potting. Utility Model Content

[0006] To improve the shortcomings of the electrode terminals relying on external tooling for positioning relative to the capacitor body, which leads to low assembly efficiency and the electrode terminals being prone to positional displacement during assembly and potting, this application provides a capacitor with self-positioning electrode terminals.

[0007] This application provides a capacitor with self-positioning electrode terminals, which adopts the following technical solution: A capacitor with self-positioning electrode terminals includes a capacitor body with electrode terminals extending from it for wiring. A positioning sleeve is fitted over the capacitor body and is coaxially arranged with the capacitor body. An annular guide groove is provided on the inner wall of the positioning sleeve. A snap-fit ​​plate is slidably connected within the annular guide groove, with both ends of the snap-fit ​​plate positioned within the annular guide groove. When the snap-fit ​​plate slides along the inner wall of the positioning sleeve, it can rotate about the axis of the positioning sleeve. A through-hole is provided on the snap-fit ​​plate, and a port hole is provided within a fixing member. The port hole communicates with the through-hole. A fixing member is fixed to the snap-fit ​​plate. The electrode terminals pass sequentially through the through-hole and the port hole and are positioned within the fixing member, so that the through-hole limits the electrode terminals.

[0008] By adopting the above technical solution, the positioning sleeve covers the capacitor body and is coaxially arranged with the capacitor body, enabling the positioning sleeve to form a positioning base with the capacitor body as a reference. A snap-fit ​​plate is slidably connected within the annular guide groove, with both ends of the snap-fit ​​plate positioned within the annular guide groove. When the snap-fit ​​plate slides along the inner wall of the positioning sleeve, it can rotate around the axis of the positioning sleeve, allowing the snap-fit ​​plate to be circumferentially adjusted according to the actual lead-out position of the electrode terminal. The through-hole communicates with the port hole. The electrode terminal passes through the through-hole and the port hole sequentially and is inserted into the fixing component. The through-hole guides and limits the electrode terminal, while the fixing component further constrains the position of the electrode terminal based on the limiting effect of the through-hole.

[0009] Therefore, the electrode terminals can form a relatively stable positional relationship with the capacitor body by means of the snap plate, through holes and fasteners, reducing the dependence on external positioning fixtures and reducing the possibility of electrode terminals shifting during assembly.

[0010] The annular guide groove provides a circumferential sliding path for the snap-fit ​​plate. Both ends of the snap-fit ​​plate are positioned within the annular guide groove, allowing it to slide stably along the inner wall of the positioning sleeve and rotate around the axis of the positioning sleeve. Simultaneously, the annular guide groove limits the movement of both ends of the snap-fit ​​plate, reducing the possibility of axial movement or radial offset during rotational adjustment. This improves the stability and positioning reliability of the snap-fit ​​plate during circumferential adjustment, facilitating the adjustment of the through holes and fasteners to positions compatible with the electrode terminals.

[0011] Preferably, the hole wall of the port hole is disposed around the outer periphery of the electrode terminal to limit the offset of the electrode terminal relative to the fixing member.

[0012] By adopting the above technical solution, the hole wall of the port hole is set around the outer periphery of the electrode terminal. After the electrode terminal is inserted into the fixing component, the port hole can form a circumferential covering and limiting of the electrode terminal. When the electrode terminal is subjected to external force or has a tendency to shift during subsequent potting, the hole wall of the port hole can limit the radial swing or deflection of the electrode terminal relative to the fixing component. Therefore, the fit stability between the electrode terminal and the fixing component can be improved, allowing the electrode terminal to maintain a stable positioning state after the insertion hole limiting is completed.

[0013] Preferably, the fixing member is a cylindrical limiting seat protruding from the buckle plate, and the port hole is provided through the fixing member along the axial direction.

[0014] By adopting the above technical solution, the fixing member is fixed to the snap-fit ​​plate, and the port hole communicates with the through hole, allowing the electrode terminal to continue to pass through the port hole after passing through it. The through hole provides a first positioning constraint for the electrode terminal, while the port hole further restricts the radial offset or swing of the electrode terminal based on the through hole, thus forming a second positioning constraint. Therefore, the through hole, as a pre-stage guide and limiting structure, provides guidance and adjustment space for the electrode terminal, while the fixing member, as a post-stage limiting structure, further restricts the offset of the electrode terminal based on the limiting effect of the through hole, improving the positional stability of the electrode terminal relative to the snap-fit ​​plate and the capacitor body.

[0015] Preferably, the electrode terminal includes a positive terminal and a negative terminal, and two fixing members are provided, which are respectively disposed at both ends of the buckle plate, and the two fixing members are used to fix the positive terminal and the negative terminal respectively.

[0016] By adopting the above technical solution, each of the positive and negative terminals corresponds to a fixing component, allowing the two electrode terminals to be individually positioned and preventing interference when they share the same positioning structure. The two fixing components are respectively located at both ends of the snap-fit ​​plate, enabling the positive and negative terminals to be positioned at an interval along the length of the snap-fit ​​plate, thus ensuring the relative spacing and lead-out position between the two electrode terminals. This improves the positioning stability of the positive and negative terminals relative to the capacitor body, facilitating subsequent wiring and assembly.

[0017] Preferably, the through hole is a strip-shaped hole, and the through hole is set along the length direction of the buckle plate.

[0018] Preferably, both ends of the buckle plate are provided with installation guide surfaces, which are used to guide the buckle plate to be installed into the annular guide groove.

[0019] By adopting the above technical solution, the installation guide surface can guide the snap-fit ​​plate when it is inserted into the annular guide groove, allowing both ends of the snap-fit ​​plate to gradually enter the annular guide groove along the installation guide surface. This reduces rigid interference between the snap-fit ​​plate and the inner wall of the positioning sleeve. Simultaneously, the installation guide surface reduces assembly resistance, making it easier for the snap-fit ​​plate to snap into and slide within the annular guide groove. Therefore, the assembly convenience of the snap-fit ​​plate is improved, and the possibility of scratches or deformation of the snap-fit ​​plate or positioning sleeve during assembly is reduced.

[0020] Preferably, a potting limiting cavity is formed between the end of the positioning sleeve near the electrode terminal and the end of the capacitor body, and a potting layer is provided in the potting limiting cavity. The snap-on plate is at least partially embedded in the potting layer to limit the offset of the snap-on plate relative to the capacitor body.

[0021] By adopting the above technical solution, the potting and limiting cavity can provide molding space for the potting layer. The snap-fit ​​plate is at least partially embedded in the potting layer, so that after the potting layer cures, it can cover and limit the snap-fit ​​plate, thereby restricting the snap-fit ​​plate from circumferential rotation, radial displacement, or axial movement relative to the capacitor body. Therefore, after the electrode terminals are positioned, the position of the snap-fit ​​plate can be further fixed by the potting layer, reducing the possibility of positional changes in the electrode terminals before and after potting, and improving the positioning stability of the electrode terminals relative to the capacitor body.

[0022] Preferably, the buckle plate has an arc-shaped positioning block in the middle, and the arc-shaped positioning block is at least partially embedded in the potting layer.

[0023] By adopting the above technical solution, the arc-shaped positioning block is set in the middle of the snap-fit ​​plate, allowing a larger potting contact area to be formed in the middle region of the snap-fit ​​plate. After the arc-shaped positioning block is at least partially embedded in the potting layer, the potting layer can cover and limit the arc-shaped positioning block during curing, thereby enhancing the bonding stability between the middle of the snap-fit ​​plate and the potting layer. This reduces the possibility of the middle of the snap-fit ​​plate tilting or shifting during electrode terminal stress or potting curing, improves the overall positioning stability of the snap-fit ​​plate, and further reduces the risk of positional changes in the electrode terminals before and after potting.

[0024] Preferably, a reinforcing block is provided on the side of the arc positioning block near the capacitor body. The reinforcing block protrudes from the end of the capacitor body and is embedded in the potting layer. The reinforcing block is used to increase the bonding area between the arc positioning block and the potting layer.

[0025] By adopting the above technical solution, the reinforcing block is positioned on the side of the arc-shaped positioning block near the capacitor body and protrudes towards the end of the capacitor body. This allows the reinforcing block to be further embedded within the potting layer. After the potting layer cures, the reinforcing block increases the bonding area between the arc-shaped positioning block and the potting layer, forming a limiting effect similar to anchoring, thereby improving the connection stability between the arc-shaped positioning block and the potting layer. This enhances the anti-displacement capability of the middle part of the snap-fit ​​plate, reducing the possibility of loosening, warping, or displacement of the snap-fit ​​plate during electrode terminal stress or potting curing, further improving the positioning stability of the electrode terminals. In summary, this application includes at least one of the following beneficial technical effects: By setting the positioning sleeve coaxially with the capacitor body and enabling the buckle plate to rotate around the axis of the positioning sleeve, the buckle plate can be circumferentially adjusted according to the actual lead-out position of the electrode terminal, reducing the reliance on external positioning fixtures and improving the assembly convenience of the electrode terminal. The electrode terminals are connected to the port hole of the fixing component through the through hole, so that the electrode terminals pass through the through hole and the port hole in sequence and are then inserted into the fixing component. The through hole can guide and limit the electrode terminals, and the fixing component can further limit the offset of the electrode terminals, thereby improving the positioning stability of the electrode terminals relative to the capacitor body. By forming a potting limiting cavity between the positioning sleeve and the end of the capacitor body, and by embedding the snap plate, the arc positioning block and the reinforcing block at least partially within the potting layer, the potting layer can limit the snap plate after curing, reducing the possibility of positional changes of the electrode terminals before and after potting, and improving the assembly quality and reliability of the capacitor. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a capacitor with self-positioning electrode terminals according to an embodiment of this application. Figure 1 .

[0027] Figure 2 This is a schematic diagram of the structure of a capacitor with self-positioning electrode terminals according to an embodiment of this application. Figure 2 .

[0028] Figure 3 This is a schematic diagram of the buckle plate in an embodiment of this application.

[0029] Figure 4 yes Figure 1 Enlarged view of point A in the middle.

[0030] Figure 5This is a schematic diagram of the structure of the prior art in the background section. Reference numerals: 1. Capacitor body; 2. Electrode terminal; 21. Positive terminal; 22. Negative terminal; 3. Positioning sleeve; 31. Annular guide groove; 32. Encapsulation limiting cavity; 4. Snap-on plate; 41. Through hole; 42. Mounting guide surface; 43. Arc positioning block; 44. Reinforcing block; 5. Fixing component; 51. Port hole; 100. Capacitor. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0032] This application discloses a capacitor with self-positioning electrode terminals. (Refer to...) Figures 1-4 A capacitor with self-positioning electrode terminals includes a capacitor body 1, with electrode terminals 2 extending from the capacitor body 1 for wiring. The electrode terminals 2 are used to connect to external circuits, electrode connectors, or device terminals. The electrode terminals 2 include a positive terminal 21 and a negative terminal 22, both of which extend outward from an end of the capacitor body 1.

[0033] The capacitor body 1 is surrounded by a positioning sleeve 3, which covers the capacitor body 1 and is coaxially arranged with the capacitor body 1. The positioning sleeve 3 can form a positioning base with the capacitor body 1 as a reference, so that the snap plate 4 subsequently installed in the positioning sleeve 3 can be positioned relative to the capacitor body 1.

[0034] A latching plate 4 is slidably mounted on the inner wall of the positioning sleeve 3. Before potting, the latching plate 4 can rotate around the axis of the positioning sleeve 3 so that the latching plate 4 can be circumferentially adjusted according to the actual lead-out position of the electrode terminal 2. The latching plate 4 is provided with a through hole 41 for the power supply terminal 2 to pass through.

[0035] A fixing member 5 is fixed on the snap-fit ​​plate 4. The fixing member 5 has a port hole 51 that communicates with the through hole 41. The electrode terminal 2 passes through the through hole 41 and the port hole 51 sequentially and is housed within the fixing member 5. The through hole 41 guides and limits the electrode terminal 2, and the fixing member 5 further constrains the position of the electrode terminal 2 through the port hole 51, thereby maintaining a relatively stable positional relationship between the electrode terminal 2 and the snap-fit ​​plate 4 and the capacitor body 1.

[0036] The wall of the port hole 51 is disposed around the outer periphery of the electrode terminal 2 to limit the offset of the electrode terminal 2 relative to the fixing member 5. Specifically, after the electrode terminal 2 passes through the port hole 51, the wall of the port hole 51 can form a circumferential covering and limiting of the electrode terminal 2, reducing the possibility of the electrode terminal 2 swaying or deflecting radially relative to the fixing member 5.

[0037] The fixing member 5 is a cylindrical limiting seat protruding from the buckle plate 4, and the port hole 51 is provided through the fixing member 5 along the axial direction. The cylindrical limiting seat can extend the limiting path of the electrode terminal 2 outside the thickness direction of the buckle plate 4, so that the electrode terminal 2 is not easy to shake after passing through the fixing member 5, thereby improving the positioning stability of the electrode terminal 2.

[0038] Two fasteners 5 are provided, one at each end of the buckle plate 4. The two fasteners 5 are used to secure the positive terminal 21 and the negative terminal 22, respectively. Correspondingly, the buckle plate 4 can be provided with two through holes 41, which communicate with the port holes 51 of the two fasteners 5, allowing the positive terminal 21 and the negative terminal 22 to pass through the corresponding through holes 41 and port holes 51, respectively, and be respectively limited by the corresponding fasteners 5.

[0039] The through hole 41 is a strip-shaped hole, and its length is set along the length of the buckle plate 4. The electrode terminal 2 can slide along the length of the through hole 41. Thus, when there is a slight deviation between the actual lead-out position of the electrode terminal 2 and the port hole 51 of the fixing member 5, the strip-shaped hole can provide sliding adjustment space for the electrode terminal 2, which facilitates the alignment of the electrode terminal 2 with the fixing member 5.

[0040] The inner wall of the positioning sleeve 3 is provided with an annular guide groove 31, and both ends of the snap-fit ​​plate 4 are disposed within the annular guide groove 31. The annular guide groove 31 provides a circumferential sliding path for the snap-fit ​​plate 4, allowing the snap-fit ​​plate 4 to slide along the inner wall of the positioning sleeve 3 and rotate around the axis of the positioning sleeve 3 for adjustment. At the same time, the annular guide groove 31 can limit the two ends of the snap-fit ​​plate 4, reducing the possibility of axial movement or radial displacement of the snap-fit ​​plate 4 during rotation adjustment.

[0041] Both ends of the snap-fit ​​plate 4 are provided with mounting guide surfaces 42, which are used to guide the snap-fit ​​plate 4 into the annular guide groove 31. The mounting guide surface 42 can be a bevel or an arc surface. When assembling the snap-fit ​​plate 4, the mounting guide surface 42 can reduce the hard interference between the end of the snap-fit ​​plate 4 and the inner wall of the positioning sleeve 3, making it easier for the snap-fit ​​plate 4 to snap into the annular guide groove 31.

[0042] A potting and limiting cavity 32 is formed between the end of the positioning sleeve 3 near the electrode terminal 2 and the end of the capacitor body 1, and a potting layer is disposed within the potting and limiting cavity 32. The potting layer can be formed by curing epoxy resin, insulating adhesive, or other potting materials suitable for capacitor encapsulation. The latching plate 4 is at least partially embedded in the potting layer to limit the offset of the latching plate 4 relative to the capacitor body 1.

[0043] A circular arc positioning block 43 is provided in the middle of the snap-fit ​​plate 4, and the circular arc positioning block 43 is at least partially embedded in the potting layer. The circular arc positioning block 43 can increase the contact area between the middle of the snap-fit ​​plate 4 and the potting layer, so that the potting layer can cover and limit the circular arc positioning block 43 after curing, thereby improving the anti-displacement ability of the middle of the snap-fit ​​plate 4.

[0044] A reinforcing block 44 is provided on the side of the arc-shaped positioning block 43 near the capacitor body 1. The reinforcing block 44 protrudes from the end facing the capacitor body 1 and is embedded in the potting layer. The reinforcing block 44 is used to increase the bonding area between the arc-shaped positioning block 43 and the potting layer. After the potting layer cures, the reinforcing block 44 can form an anchoring and limiting effect within the potting layer, reducing the possibility of the arc-shaped positioning block 43 and the snap-fit ​​plate 4 becoming loose, warped, or displaced.

[0045] The implementation principle of a capacitor with self-positioning electrode terminals according to an embodiment of this application is as follows: During assembly, a positioning sleeve 3 is fitted over the capacitor body 1, so that the positioning sleeve 3 and the capacitor body 1 are coaxially arranged; then, a snap-fit ​​plate 4 is installed into the annular guide groove 31 on the inner wall of the positioning sleeve 3, so that the snap-fit ​​plate 4 can be circumferentially adjusted with the axis of the positioning sleeve 3 as the center before potting. The electrode terminal 2 passes through the through hole 41 on the snap-fit ​​plate 4 and the port hole 51 in the fixing member 5 in sequence, and is inserted into the fixing member 5.

[0046] During this process, the buckle plate 4 can adjust the circumferential position of the through hole 41 and the fixing member 5 relative to the capacitor body 1 by rotation. The through hole 41 can guide and limit the electrode terminal 2. The fixing member 5 can further limit the offset of the electrode terminal 2 relative to the buckle plate 4 through the port hole 51, thereby reducing the dependence on external positioning fixtures.

[0047] After the electrode terminal 2 is positioned, a potting layer is formed between the end of the positioning sleeve 3 near the electrode terminal 2 and the end of the capacitor body 1, so that the snap-fit ​​plate 4, the arc positioning block 43, and the reinforcing block 44 are at least partially embedded in the potting layer. After the potting layer is cured, it can restrict the snap-fit ​​plate 4 from circumferential rotation, radial displacement, or axial movement relative to the capacitor body 1; the arc positioning block 43 and the reinforcing block 44 can increase the bonding area between the snap-fit ​​plate 4 and the potting layer, thereby improving the snap-fit ​​plate 4's anti-displacement ability and reducing the possibility of the electrode terminal 2 changing position before and after potting. Finally, stable self-positioning of the electrode terminal 2 relative to the capacitor body 1 is achieved. The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A capacitor with self-positioning electrode terminals, characterized in that: The device includes a capacitor body (1), with electrode terminals (2) extending from the capacitor body (1) for wiring. A positioning sleeve (3) is fitted over the capacitor body (1) and is coaxially arranged with the capacitor body (1). An annular guide groove (31) is provided on the inner wall of the positioning sleeve (3). A snap-fit ​​plate (4) is slidably connected in the annular guide groove (31). Both ends of the snap-fit ​​plate (4) are located in the annular guide groove (31). The snap-fit ​​plate (4) is positioned along the inner wall of the positioning sleeve (3). When sliding, the buckle plate can rotate around the axis of the positioning sleeve (3). The buckle plate (4) is provided with a through hole (41). A fixing member (5) is fixed on the buckle plate (4). A port hole (51) is provided in the fixing member (5). The port hole (51) communicates with the through hole (41). The electrode terminal (2) passes through the through hole (41) and the port hole (51) in sequence and is inserted into the fixing member (5) so that the through hole (41) limits the electrode terminal (2).

2. The capacitor with self-positioning electrode terminals according to claim 1, characterized in that: The hole wall of the port hole (51) is arranged around the outer periphery of the electrode terminal (2) to limit the offset of the electrode terminal (2) relative to the fixing member (5).

3. The capacitor with self-positioning electrode terminals according to claim 1, characterized in that: The fixing member (5) is a cylindrical limiting seat protruding from the buckle plate (4), and the port hole (51) is provided through the fixing member (5) along the axial direction.

4. The capacitor with self-positioning electrode terminals according to claim 1, characterized in that: The electrode terminal (2) includes a positive terminal (21) and a negative terminal (22). There are two fixing members (5), which are respectively located at both ends of the buckle plate (4). The two fixing members (5) are used to fix the positive terminal (21) and the negative terminal (22).

5. The capacitor with self-positioning electrode terminals according to claim 2, characterized in that: The through hole (41) is a strip-shaped hole, and the through hole (41) is set along the length direction of the buckle plate (4).

6. The capacitor with self-positioning electrode terminals according to claim 1, characterized in that: Both ends of the buckle plate (4) are provided with installation guide surfaces (42), which are used to guide the buckle plate (4) to be installed into the annular guide groove (31).

7. The capacitor with self-positioning electrode terminals according to claim 1, characterized in that: A potting limiting cavity (32) is formed between the end of the positioning sleeve (3) near the electrode terminal (2) and the end of the capacitor body (1). A potting layer is provided in the potting limiting cavity (32). The buckle plate (4) is at least partially embedded in the potting layer to limit the buckle plate (4) from shifting relative to the capacitor body (1).

8. The capacitor with self-positioning electrode terminals according to claim 7, characterized in that: The buckle plate (4) is provided with an arc positioning block (43) in the middle, and the arc positioning block (43) is at least partially embedded in the potting layer.

9. The capacitor with self-positioning electrode terminals according to claim 8, characterized in that: A reinforcing block (44) is provided on the side of the arc positioning block (43) close to the capacitor body (1). The reinforcing block (44) protrudes from the end of the capacitor body (1) and is embedded in the potting layer. The reinforcing block (44) is used to increase the bonding area between the arc positioning block (43) and the potting layer.

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