A film capacitor with good thermal conductivity

Abstract

The present invention relates to the technical field of capacitors, and in particular to a film capacitor with good thermal conductivity, comprising an outer plastic shell, a capacitor structure is fixedly arranged on the inner side of the outer plastic shell, two pins are fixedly inserted on the lower surface of the outer plastic shell, fixed plates are respectively fixedly connected to the two sides of the lower surface of the outer plastic shell, a connecting frame is fixedly connected to the side surface of the fixing plate, an arc-shaped guide frame is fixedly connected to the front end of the connecting frame, a fixed shaft is fixedly passed through the fixing plates on both sides, the two ends of the fixing shaft respectively pass through the side of the fixing plate and are slidably sleeved with connecting plates, and a folding plate is fixedly connected to the front surface of the connecting plate. The present invention has a good protection effect, prevents the problem of scalding the outer plastic shell and the internal structure, ensures the normal operation of the capacitor, and the pins are convenient to bend without the aid of other tools. During the bending of the pins, the damage to the aluminum lead can be effectively reduced to prevent the problem of loose connection.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitors, and in particular to a film capacitor with good thermal conductivity. Background Art

[0002] Patent CN211529799U discloses a high thermal conductivity metallized film capacitor. A high thermal conductivity metallized film capacitor is disclosed, comprising a capacitor box, a capacitor box, a terminal fixedly mounted on the upper end of the capacitor box, four sides of the capacitor box are fixedly connected with a heat conducting sheet, a heat conducting sheet is arranged on a side away from the capacitor box, both ends of the capacitor box are fixedly connected with a connecting block, a circular hole is provided on the connecting block, a box body is arranged outside the capacitor box, a box cover is fixedly connected to the upper side of the box body by screws, a connecting hole is provided on the upper side of the box cover, and the terminal extends to the outside of the box body through the connecting hole, mounting blocks are fixedly connected to both sides of the box body, four threaded rods are fixedly connected to the bottom wall of the box body, and nuts are threadedly connected to the threaded rods through the circular holes. The utility model discloses a high thermal conductivity metallized film capacitor, which is convenient for efficient heat conduction and enhanced heat dissipation. The first dustproof net and the second dustproof net can block dust from entering to prevent dust from covering the heat sink and affecting the heat dissipation of the heat sink; however, the above patent has the following shortcomings.

[0003] When the capacitor is installed on the circuit board, the pins are connected to the circuit board by welding. When the soldering iron is used, the surface of the capacitor body may be easily burned due to the high temperature, causing the structure to melt and be damaged. In addition, for some specific installation requirements, the pins need to be bent so that the height of the capacitor protruding from the circuit board surface is reduced after installation to save the required layout space of the finished circuit board. During the pin bending process, since the pins are small, when they are bent by tools such as pliers, the pins and the capacitor body may become loose and damaged. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to provide a film capacitor with good thermal conductivity.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a film capacitor with good thermal conductivity, comprising an outer plastic shell, a capacitor structure is fixedly arranged on the inner side of the outer plastic shell, two pins are fixedly inserted on the lower surface of the outer plastic shell, fixed plates are respectively fixedly connected at both sides of the lower surface of the outer plastic shell, a connecting frame is fixedly connected to the side surface of the fixing plate, an arc-shaped guide frame is fixedly connected to the front end of the connecting frame, a fixed shaft is fixedly passed through the fixing plates on both sides, two ends of the fixing shaft respectively pass through the side of the fixing plate and are slidably sleeved with a connecting plate, a folding plate is fixedly connected to the front surface of the connecting plate, a movable shaft is fixedly connected between the connecting plates on both sides, the movable shaft slides through the inner side of the arc-shaped guide frame, and the pin passes through the surface of the folding plate;

[0006] The trajectory of the movable shaft sliding along the inner side of the arc-shaped guide frame falls on the guide track circle, and the shaft track circle with the fixed shaft as the central axis intersects with the guide track circle to form a travel intersection. The trajectory of the movable shaft when sliding is located on the inner side of the shaft track circle, and the movable shaft passes through the travel intersection when sliding to the bottom.

[0007] Preferably, the capacitor structure includes an element fixedly embedded in the inner side of the outer plastic shell, two aluminum leads are fixedly embedded in the lower surface of the element, the upper end of the pin is fixedly connected to the lower end of the aluminum lead, and the inner side of the outer plastic shell and close to the lower end of the element is filled with sealant.

[0008] Preferably, a sliding opening is provided through the side surface of the connecting plate, and both ends of the fixed shaft are respectively fixedly connected with T-shaped columns, and the ends of the T-shaped columns slide through the inner side of the sliding opening.

[0009] Preferably, a plurality of adhesive pads are fixedly connected to the lower end of the front surface of the outer plastic shell, and the adhesive pads are fixedly connected to the rear surface of the folding plate.

[0010] Preferably, a docking frame is fixedly connected to the rear side of the inner bottom surface of the folding plate, a docking block is fixedly connected to the lower side of the rear surface of the outer plastic shell, and a hook is connected to the outer surface of the docking block via an elastic mechanism.

[0011] Preferably, the elastic mechanism includes a guide plate fixedly connected to the upper surface of the docking block, the upper end of the hook is fixedly connected to a sleeve frame, the sleeve frame is slidably sleeved on the outer surface of the guide plate, the inner side of the sleeve frame is fixedly connected to a guide column, the guide column slides through the outer surface of the guide plate, the outer surface of the guide column is sleeved with a compression spring, and the compression spring is located on the front surface of the guide plate.

[0012] Preferably, an end surface of the hook is provided with an inclined guide surface, and an edge of the docking frame is provided with a chamfered edge.

[0013] Preferably, two through openings are formed through the inner bottom surface of the folding plate, and the pins pass through the inner sides of the through openings.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention has a good protective effect, prevents the problem of scalding the outer plastic shell and the internal structure, and ensures the normal operation of the capacitor;

[0016] The pins of the present invention are easy to bend without the need for other tools;

[0017] The present invention can effectively reduce the damage to the aluminum lead during the bending of the pin and prevent the problem of loose connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a film capacitor with good thermal conductivity according to the present invention;

[0019] Figure 2 A partial cross-sectional view of a film capacitor with good thermal conductivity according to the present invention;

[0020] Figure 3 A film capacitor with good thermal conductivity according to the present invention Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 A cross-sectional view of a folded plate of a film capacitor having good thermal conductivity according to the present invention;

[0022] Figure 5 A cross-sectional view of a folded plate of a film capacitor with good thermal conductivity according to the present invention from another perspective;

[0023] Figure 6 A side cross-sectional view of a folded plate of a film capacitor having good thermal conductivity according to the present invention;

[0024] Figure 7 This is a schematic diagram of a folding plate of a film capacitor with good thermal conductivity according to the present invention after rotation;

[0025] Figure 8 It is a schematic diagram of a docking frame and a docking block of a film capacitor with good thermal conductivity according to the present invention being connected;

[0026] Fig. 9 This is a cross-sectional view of the outer plastic shell of a film capacitor with good thermal conductivity according to the present invention.

[0027] 1. Outer plastic shell; 2. Pin; 3. Folding plate; 4. Connecting plate; 5. Fixed shaft; 6. T-column; 7. Slide; 8. Movable shaft; 9. Fixed plate; 10. Connecting frame; 11. Arc guide frame; 12. Docking frame; 13. Docking block; 14. Hook; 15. Sleeve frame; 16. Guide plate; 17. Guide column; 18. Compression spring; 19. Beveled edge; 20. Beveled guide surface; 21. Adhesive pad; 22. Sealant; 23. Aluminum lead; 24. Element; 25. Through port; 26. Bending section; 27. Shaft track circle; 28. Guide track circle; 29. ​​Travel intersection. DETAILED DESCRIPTION

[0028] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0029] like Figure 1-Figure 9A film capacitor with good thermal conductivity shown in the figure comprises an outer plastic shell 1, a capacitor structure is fixedly arranged on the inner side of the outer plastic shell 1, two pins 2 are fixedly inserted on the lower surface of the outer plastic shell 1, and fixed plates 9 are fixedly connected to the two sides of the lower surface of the outer plastic shell 1, and the side surface of the fixed plate 9 is fixedly connected to the connecting frame 10, and the front end of the connecting frame 10 is fixedly connected to the arc guide frame 11, and a fixed shaft 5 is fixedly passed through the fixed plates 9 on both sides, and the two ends of the fixed shaft 5 pass through the side of the fixed plate 9 and are slidably sleeved with a connecting plate 4, and the front surface of the connecting plate 4 is fixedly connected with a folding plate 3, and a movable shaft 8 is fixedly connected between the connecting plates 4 on both sides, and the movable shaft 8 slides through the inner side of the arc guide frame 11, and the pin 2 passes through the surface of the folding plate 3;

[0030] Among them, please refer to Figure 6 As shown, the following conditions need to be met for the setting of the movable shaft 8: the sliding track of the movable shaft 8 along the inner side of the arc guide frame 11 falls on the guide track circle 28, the axis track circle 27 with the fixed shaft 5 as the central axis intersects with the guide track circle 28 to form a travel intersection 29, the sliding track of the movable shaft 8 is located inside the axis track circle 27, and the movable shaft 8 passes through the travel intersection 29 when sliding to the bottom. This part of the design allows the bending force to be dispersed to the surface of the movable shaft 8 and the fixed shaft 5 during the bending process of the pin 2, preventing it from being directly transmitted to the capacitor structure and causing damage.

[0031] like Fig. 9 As shown, the capacitor structure includes an element 24 fixedly embedded in the inner side of the outer plastic shell 1, two aluminum leads 23 fixedly embedded in the lower surface of the element 24, the upper end of the pin 2 is fixedly connected to the lower end of the aluminum lead 23, and the inner side of the outer plastic shell 1 and near the lower end of the element 24 is filled with a sealant 22. This part is a common technology in capacitors and will not be described in detail.

[0032] like Figure 5 As shown, a sliding opening 7 is formed through the side surface of the connecting plate 4, and T-shaped columns 6 are fixedly connected to both ends of the fixed shaft 5, respectively, and the ends of the T-shaped columns 6 slide through the inner side of the sliding opening 7. The T-shaped columns 6 are used to prevent the connecting plate 4 from moving sideways away from the ends of the fixed shaft 5, and at the same time, they will not affect the rotation and sliding of the connecting plate 4 relative to the ends of the fixed shaft 5.

[0033] like Figure 7 As shown, a plurality of adhesive pads 21 are fixedly connected at the lower end of the front surface of the outer plastic shell 1, and the adhesive pads 21 are fixedly connected to the rear surface of the folding plate 3. The adhesive pads 21 are hot melt adhesives, and the folding plate 3 can be separated from it by slightly applying external force.

[0034] like Figure 7 , Figure 8As shown, a docking frame 12 is fixedly connected to the rear side of the inner bottom surface of the folding plate 3, a docking block 13 is fixedly connected to the lower side of the rear surface of the outer plastic shell 1, and a hook 14 is connected to the outer surface of the docking block 13 through an elastic mechanism. After the folding plate 3 rotates, the docking frame 12 will be stuck by the hook 14 to play a role of limiting.

[0035] The elastic mechanism includes a guide plate 16 fixedly connected to the upper surface of the docking block 13, a sleeve frame 15 fixedly connected to the upper end of the hook 14, the sleeve frame 15 is slidably sleeved on the outer surface of the guide plate 16, a guide post 17 is fixedly connected to the inner side of the sleeve frame 15, the guide post 17 slides through the outer surface of the guide plate 16, the outer surface of the guide post 17 is sleeved with a compression spring 18, and the compression spring 18 is located on the front surface of the guide plate 16. An inclined guide surface 20 is provided on the end surface of the hook 14, and a chamfered edge 19 is provided on the edge of the docking frame 12. In the process of rotating the folding plate 3, the inclined guide surface 20 and the chamfered edge 19 are pushed against each other, thereby causing the hook 14 to move downward, so that the edge of the docking frame 12 is stuck on the inner side of the docking frame 12, and then, under the action of the compression spring 18, the hook 14 is reset and sleeved on the edge of the docking frame 12 to achieve the role of limiting. This part of the design allows the folding plate 3 to remain stable after rotation, avoiding the problem of natural deformation of the pin 2 after bending.

[0036] like Figure 5 As shown, the inner bottom surface of the folding plate 3 is penetrated with two through holes 25, and the pins 2 pass through the inner sides of the through holes 25. The aperture of the through holes 25 is slightly larger than the diameter of the pins 2, so as to allow the pins 2 to pass through.

[0037] When welding the capacitor, the user connects the pin 2 to the circuit board and uses an electric soldering iron to perform welding. The electric soldering iron extends obliquely from the front of the folding plate 3 to the lower end of the pin 2. During welding, the folding plate 3 plays a good protective effect, preventing the outer plastic shell 1 and the internal structure from being burned, thereby ensuring the normal operation of the capacitor.

[0038] For some specific installation requirements, such as when the upper end of the electrical component is required not to protrude too high from the surface of the circuit board after welding, after holding and fixing the outer plastic shell 1, turn the folding plate 3 downward, and the movable shaft 8 will slide along the inner side of the arc-shaped guide frame 11, and cooperate with the fixed shaft 5 to support the surface of the pin 2, so that the pin 2 is bent to form a bent section 26. It should be noted that since the trajectory of the movable shaft 8 when sliding is located on the inner side of the shaft trajectory circle 27, the surface of the pin 2 is locally squeezed while the pin 2 is bent, ensuring that during the bending process, the pin 2 is tightly attached to the surface of the fixed shaft 5 and the movable shaft 8. Therefore, the main force during bending is applied to the surface of the pin 2 for squeezing, avoiding the force being directly transmitted to the aluminum lead 23 and other positions to cause damage to the capacitor body, such as Figure 7 As shown, this is a schematic diagram of pin 2 after being bent.

[0039] When the pin 2 is bent, the middle axis of the movable shaft 8 passes through the travel intersection 29 when it slides to the bottom, so that the pin 2 can be bent nearly ninety degrees after bending, so that after welding, the outer plastic shell 1 is in a state of being rotated nearly ninety degrees, which can effectively reduce the height of the entire capacitor protruding from the surface of the circuit board after welding, and reduce the space required for installing the finished circuit board.

[0040] During the process of bending the pin 2, the movable axis 8 does not rotate around the fixed axis 5. In addition to rotating relative to the fixed axis 5, the connecting plate 4 also moves perpendicularly to the fixed axis 5. At this time, the sliding mouth 7 slides relative to the surface of the T-shaped column 6, and no jamming problem occurs.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A film capacitor with good thermal conductivity, comprising an outer plastic shell (1), wherein a capacitor structure is fixedly arranged on the inner side of the outer plastic shell (1), characterized in that: Two pins (2) are fixedly inserted on the lower surface of the outer plastic shell (1), and fixed plates (9) are fixedly connected to the two sides of the lower surface of the outer plastic shell (1), and the side surface of the fixed plate (9) is fixedly connected to the connecting frame (10), and the front end of the connecting frame (10) is fixedly connected to the arc guide frame (11), and a fixed shaft (5) is fixedly passed through the fixed plates (9) on both sides, and the two ends of the fixed shaft (5) respectively pass through the side of the fixed plate (9) and are slidably sleeved with a connecting plate (4), and the front surface of the connecting plate (4) is fixedly connected to a folding plate (3), and a movable shaft (8) is fixedly connected between the connecting plates (4) on both sides, and the movable shaft (8) slides through the inner side of the arc guide frame (11), and the pins (2) pass through the surface of the folding plate (3); The trajectory of the movable shaft (8) sliding along the inner side of the arc-shaped guide frame (11) falls on the guide trajectory circle (28), and the shaft trajectory circle (27) with the fixed shaft (5) as the central axis intersects with the guide trajectory circle (28) to form a travel intersection (29). The trajectory of the movable shaft (8) when sliding is located on the inner side of the shaft trajectory circle (27), and the movable shaft (8) passes through the travel intersection (29) when sliding to the bottom.

2. A film capacitor with good thermal conductivity according to claim 1, characterized in that: The capacitor structure comprises an element (24) fixedly embedded in the inner side of an outer plastic shell (1), two aluminum leads (23) fixedly embedded in the lower surface of the element (24), the upper end of the pin (2) fixedly connected to the lower end of the aluminum lead (23), and the inner side of the outer plastic shell (1) and close to the lower end of the element (24) is filled with sealant (22).

3. A film capacitor with good thermal conductivity according to claim 1, characterized in that: A sliding opening (7) is provided through the side surface of the connecting plate (4), and both ends of the fixed shaft (5) are respectively fixedly connected to T-shaped columns (6), and the ends of the T-shaped columns (6) slide through the inner side of the sliding opening (7).

4. A film capacitor with good thermal conductivity according to claim 1, characterized in that: A plurality of adhesive pads (21) are fixedly connected to the lower end of the front surface of the outer plastic shell (1), and the adhesive pads (21) are fixedly connected to the rear surface of the folding plate (3).

5. A film capacitor with good thermal conductivity according to claim 1, characterized in that: A docking frame (12) is fixedly connected to the rear side of the inner bottom surface of the folding plate (3), a docking block (13) is fixedly connected to the lower side of the rear surface of the outer plastic shell (1), and a hook (14) is connected to the outer surface of the docking block (13) via an elastic mechanism.

6. A film capacitor with good thermal conductivity according to claim 5, characterized in that: The elastic mechanism comprises a guide plate (16) fixedly connected to the upper surface of the docking block (13); the upper end of the hook (14) is fixedly connected to a sleeve frame (15); the sleeve frame (15) is slidably sleeved on the outer surface of the guide plate (16); the inner side of the sleeve frame (15) is fixedly connected to a guide column (17); the guide column (17) slides through the outer surface of the guide plate (16); the outer surface of the guide column (17) is sleeved with a compression spring (18), and the compression spring (18) is located on the front surface of the guide plate (16).

7. A film capacitor with good thermal conductivity according to claim 5, characterized in that: The end surface of the hook (14) is provided with an inclined guide surface (20), and the edge of the docking frame (12) is provided with a chamfered edge (19).

8. A film capacitor with good thermal conductivity according to claim 1, characterized in that: The inner bottom surface of the folding plate (3) is provided with two through openings (25), and the pins (2) pass through the inner sides of the through openings (25).

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