Capacitor element and cutter

Abstract

The capacitor element comprises an element main body and a winding adhesive tape, the element main body comprises a diaphragm which is wound into a cylindrical shape from inside to outside, the winding adhesive tape surrounds the periphery of the middle part of the element main body, the tail end of the diaphragm is provided with a cut-off edge, the cut-off edge comprises a straight cut section and two inclined cut sections, and the straight cut section and the two inclined cut sections are arranged in parallel. The two beveled sections are located on the two sides, in the width direction of the diaphragm, of the straight cutting section correspondingly, and the beveled sections are obliquely arranged from the middle to the side edge in the direction away from the tail end of the diaphragm. The two sides of the straight cutting section are provided with the beveled cutting sections, and the positions of the beveled cutting sections are in an inward concave state compared with the end face of the element main body, so that the positions of the beveled cutting sections are not easy to touch with the outside, the probability that the edge positions of the cut edges are upwarped due to touch with the outside can be reduced, the subsequent assembly production is facilitated, and the product quality is improved; and after the edge position of the cut edge is not easy to tilt, the width of the winding adhesive tape can be reduced, and the material cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor element and a cutter. Background Art

[0002] The element is an important component in the capacitor. The element is mainly made of diaphragm material, which is wound by a winding machine to a suitable length and then cut by a cutter. After cutting, tape is wrapped around the periphery of the element to maintain its shape so that the diaphragm does not fall apart. The capacitor is then made through multiple subsequent processes.

[0003] The existing element 01 is basically straight at the cutting edge 02. Figure 1 When the element is transported between processes, the edges of the cutting edge 02 are easily touched by foreign objects, causing the diaphragm position not covered by the tape 04 to easily warp 03. Figure 2 , affecting subsequent assembly production and reducing quality. It also means that in order to reduce or eliminate warping at the cutting edge of the diaphragm, it is necessary to use a wider tape 04 to increase the width of the wrapping to increase the limit on warping, thereby increasing the cost of the tape material. Utility Model Content

[0004] The main purpose of the utility model is to provide a capacitor element and a cutter, aiming to solve the technical problem in the prior art that the edge of the diaphragm cut of the element is easy to warp, which affects the assembly production and increases the cost of the tape material.

[0005] To achieve the above-mentioned purpose, the utility model proposes a capacitor element, including an element body and a winding tape, the element body including a diaphragm wound from the inside to the outside into a cylindrical shape, the winding tape surrounding the outer periphery of the middle part of the element body, the end of the diaphragm having a cut edge, the cut edge including a straight cut section and two beveled sections, the two beveled sections are respectively located on both sides of the straight cut section in the width direction of the diaphragm, and the beveled section is inclined from the middle to the side edge in the direction away from the end of the diaphragm.

[0006] Bevel sections are provided on both sides of the straight section. The bevel sections are recessed inward compared to the end faces of the element main body, so they are not easily touched by the outside. This can reduce the chance of the edge of the cut side warping due to contact with the outside, which is beneficial to subsequent assembly production and improving product quality. After the edge of the cut side is not easily warped, the width of the wrapping tape can be reduced, thereby reducing the cost of materials.

[0007] Preferably, the width of the wrapping tape is greater than or equal to the length of the straight cut section, and the wrapping tape covers the straight cut section. The two ends of the straight cut section may also touch the outside and warp up, so the wrapping tape covers the straight cut section to prevent the two ends of the straight cut section from warping up.

[0008] Preferably, the width of the element body is d1, the width of the wrapping tape is d2, and d2=(1 / 3-2 / 3)*d1.

[0009] Preferably, the width of the element body is d1, the width of the straight-cut segment is d3, and d3=(1 / 3-2 / 3)*d1.

[0010] Preferably, the angle α between the beveled section and the end face of the element body is 40 to 60 degrees.

[0011] On the other hand, the utility model also proposes a cutter for cutting the above-mentioned capacitor elements, the cutter includes a straight knife plate and two oblique knife plates respectively located on both sides of the straight knife plate, the two oblique knife plates are inclined toward the outside of the straight knife plate, and the two oblique knife plates are inclined toward the same side of the thickness direction of the straight knife plate, the cutter is provided with a blade, the blade is provided at the ends of the straight knife plate and the oblique knife plate, the straight knife plate is used to cut the straight cut segment, and the oblique knife plate is used to cut the oblique cut segment.

[0012] When finishing winding the element body, the cutter can be used to cut the diaphragm to form a cut edge with a straight cut section and a bevel cut section, so that the edge position of the cut edge of the diaphragm is not easy to warp, which is beneficial to subsequent assembly production and improves product quality, and reduces the cost of winding tape materials.

[0013] Preferably, the inclination angle β of the bevel blade is 30 to 50 degrees.

[0014] Preferably, the two bevel blades are arranged in mirror symmetry.

[0015] Preferably, the blade is provided with serrations, which can improve the sharpness of the blade and facilitate cutting of the diaphragm.

[0016] Preferably, the straight knife plate is provided with a mounting hole for fixing to an external structure, and the straight knife plate can be fixed on the winding machine through the mounting hole and screws for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the existing element;

[0019] Figure 2Schematic diagram of the structure of wrapping the existing element with tape and cutting the edges;

[0020] Figure 3 It is a structural schematic diagram of the main body of the element of the utility model;

[0021] Figure 4 It is a structural schematic diagram of a capacitor element of the utility model;

[0022] Figure 5 It is a schematic diagram of the partial structure of the cut edge and the winding tape of the diaphragm of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the cutter of the utility model;

[0024] Figure 7 Another angle of the cutter of the utility model and a schematic diagram of the relative position when cutting the wrapping tape;

[0025] Figure 8 It is a schematic diagram of the cross-sectional structure of the cutter of the utility model.

[0026] In the accompanying drawings: 1-element body, 11-diaphragm, 12-cutting edge, 121-straight cutting section, 122-oblique cutting section, 13-guide needle, 2-wrapping tape, 3-cutter, 31-straight knife plate, 311-mounting hole, 32-oblique knife plate, 33-blade, 331-sawtooth.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0031] like Figures 3 to 5 As shown, a capacitor element includes an element body 1 and a winding tape 2, wherein the element body 1 includes a diaphragm 11 wound from the inside to the outside into a cylindrical shape, and the element body 1 also includes a guide pin 13 connected to the diaphragm 11, and the winding tape 2 is surrounded by the outer periphery of the middle part of the element body 1, and the end of the diaphragm 11 has a cut edge 12, and the cut edge 12 includes a straight cut section 121 and two beveled sections 122, the straight cut section 121 is basically parallel to the width direction of the diaphragm 11, and the two beveled sections 122 are respectively located on both sides of the straight cut section 121 in the width direction of the diaphragm 11, and the beveled section 122 is inclined from the middle to the side edge in the direction away from the end of the diaphragm 11.

[0032] Bevel sections 122 are provided on both sides of the straight cut section 121. The position of the bevel sections 122 is inwardly concave compared to the end face of the element body 1, so the position of the bevel sections 122 is not easy to touch the outside, which can reduce the probability of the edge position of the cut edge 12 touching the outside and warping, which is beneficial to subsequent assembly production and improving product quality. After the edge position of the cut edge 12 is not easy to warp, the width of the winding tape 2 can be reduced to reduce the cost of materials.

[0033] In some specific embodiments, the width of the wrapping tape 2 is greater than or equal to the length of the straight cut section 121, and the wrapping tape 2 covers the straight cut section 121. The two ends of the straight cut section 121 may also come into contact with the outside and warp up, so the wrapping tape 2 covers the straight cut section 121 to prevent the two ends of the straight cut section 121 from warping up.

[0034] In some specific embodiments, the width of the element body 1 is d1, and the width of the wrapping tape 2 is d2, d2 = (1 / 3 to 2 / 3) * d1. Within this range, the wrapping tape 2 can better wrap and maintain the shape of the element body 1, while also limiting the warping of the cut edge 12. The specific width is set according to the width of the capacitor's diaphragm.

[0035] In some specific embodiments, the width of the element body 1 is d1, and the width of the straight-cut segment 121 is d3, where d3 = (1 / 3 to 2 / 3) * d1.

[0036] In some specific embodiments, the angle α between the beveled section 122 and the end surface of the element body 1 is 40 to 60 degrees. The length of the straight section 121 and the angle of the beveled section 122 can control the size of the beveled section 122 while increasing the probability that the beveled section 122 is not touched.

[0037] On the other hand, referring to Figures 6 to 8 A cutter 3 for cutting the capacitor element, the cutter 3 comprising a straight blade plate 31 and two oblique blade plates 32 respectively located on both sides of the straight blade plate 31, the two oblique blade plates 32 are inclined toward the outside of the straight blade plate 31, and the two oblique blade plates 32 are inclined toward the same side of the thickness direction of the straight blade plate 31, the cutter 3 is provided with a blade 33, the blade 33 is provided at the ends of the straight blade plate 31 and the oblique blade plate 32, the straight blade plate 31 is used to cut the straight cut section 121, and the oblique blade plate 32 is used to cut the oblique cut section 122.

[0038] The cutter 3 is installed on the winding machine. When the winding of the element body 1 is finished, the diaphragm 11 is in a flat state. The cutter 3 can be used to cut the diaphragm 11 to separate the element body 1. When the cutter 3 cuts the diaphragm 11, it is basically perpendicular to the diaphragm 11. Figure 7 The end of the diaphragm 11 forms a cut edge 12 having a straight cut section 121 and a bevel cut section 122, which can prevent the edge of the cut edge 12 of the diaphragm 11 from warping, which is beneficial to subsequent assembly production and improving product quality, and reducing the cost of the winding tape 2 material.

[0039] In some specific embodiments, the inclination angle β of the bevel blade 32 is 30 to 50 degrees. At this inclination angle, the probability of the bevel section 122 not being touched can be increased. Preferably, it is 40 degrees.

[0040] In some specific embodiments, the two bevel blades 32 are arranged in mirror symmetry.

[0041] In some specific embodiments, the blade 33 is provided with serrations 331. The blade 33 with serrations 331 can improve the sharpness of the blade 33, facilitate cutting of the diaphragm 11, and ensure normal production during processing. After cutting, serrations are also provided on the cut edge 12 of the diaphragm 11.

[0042] In some specific embodiments, the straight knife plate 31 is provided with a mounting hole 311 for fixing to an external structure, and the straight knife plate 31 can be fixed on the winding machine through the mounting hole 311 and screws for use.

[0043] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A capacitor element, characterized in that: The invention comprises an element body (1) and a winding tape (2), wherein the element body (1) comprises a diaphragm (11) wound from the inside to the outside into a cylindrical shape, the winding tape (2) surrounds the outer periphery of the middle part of the element body (1), the end of the diaphragm (11) has a cut edge (12), the cut edge (12) comprises a straight cut section (121) and two beveled sections (122), the two beveled sections (122) are respectively located on both sides of the straight cut section (121) in the width direction of the diaphragm (11), and the beveled section (122) is inclined from the middle to the side edge in the direction away from the end of the diaphragm (11).

2. The capacitor element according to claim 1, wherein: The width of the wrapping tape (2) is greater than or equal to the length of the straight-cut section (121), and the wrapping tape (2) covers the straight-cut section (121).

3. The capacitor element according to claim 1, wherein: The width of the element body (1) is d1, and the width of the wrapping tape (2) is d2, where d2 = (1 / 3 to 2 / 3) * d1.

4. The capacitor element according to claim 1, wherein: The width of the element body (1) is d1, and the width of the straight cut section (121) is d3, where d3 = (1 / 3 to 2 / 3) * d1.

5. The capacitor element according to claim 1, wherein: The angle α between the beveled section (122) and the end face of the element body (1) is 40 to 60 degrees.

6. A cutting knife (3), characterized in that: Used for producing the capacitor element according to any one of claims 1 to 5, the cutter (3) comprises a straight knife plate (31) and two oblique knife plates (32) respectively located on both sides of the straight knife plate (31), the two oblique knife plates (32) are inclined toward the outside of the straight knife plate (31), and the two oblique knife plates (32) are inclined toward the same side of the thickness direction of the straight knife plate (31), the cutter (3) is provided with a blade (33), and the blade (33) is provided at the ends of the straight knife plate (31) and the oblique knife plate (32), the straight knife plate (31) is used for cutting the straight cut section (121), and the oblique knife plate (32) is used for cutting the oblique cut section (122).

7. The cutter (3) according to claim 6, characterized in that The inclination angle β of the inclined blade (32) is 30 to 50 degrees.

8. The cutter (3) according to claim 6, characterized in that The two inclined blade plates (32) are arranged in mirror symmetry.

9. The cutter (3) according to claim 6, characterized in that The blade (33) is provided with saw teeth (331).

10. The cutter (3) according to claim 6, characterized in that The straight blade plate (31) is provided with a mounting hole (311) for fixing to an external structure.

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