CAPACITOR AND ELECTRONIC DEVICE COMPRISING SAME

An electronic device including a substrate comprising a hole, and a capacitor capable of being inserted and fixed to the hole of the substrate. The electronic device includes a substrate including a hole, and a capacitor inserted to the hole so as to be mounted on the substrate. The capacitor includes a case provided to accommodate a dielectric therein and forming an exterior of the capacitor, a lead wire connected to the dielectric and extending from an inside of the case to an outside of a first side surface of the case, and a groove recessed on a second side surface of the case opposite to the first side surface and provided to be engaged with a side, which forms a circumference of the hole, of the substrate to allow the case to be inserted and fixed to the hole.

TECHNICAL FIELD

The present disclosure relates to a capacitor including an improved structure and an electronic device including the same.

BACKGROUND

Capacitors are widely used in various electronic devices and are also used as parts of television (TV).

2. Description of Related Art

Recently, research on ultra-slim TV has been continuously conducted. Accordingly, it is required to reduce a thickness of a substrate, on which the capacitor is mounted, so as to realize an ultra-slim TV.

SUMMARY

The present disclosure is directed to providing a capacitor capable of improving a structure of a case of the capacitor so as to reduce the sum of a thickness of a substrate and a thickness of the capacitor mounted on the substrate and so as to secure a margin in thickness of the capacitor, and an electronic device including the same.

Further, the present disclosure is directed to providing a substrate including a hole, a capacitor capable of being inserted and fixed to the hole of the substrate, and an electronic device including the same.

Further, the present disclosure is directed to providing a capacitor capable of being fixed to a substrate without an additional fixing process or subsidiary materials, and an electronic device including the same.

One aspect of the present disclosure provides an electronic device including a substrate including a hole, and a capacitor inserted to the hole so as to be mounted on the substrate. The capacitor includes a case provided to accommodate a dielectric therein and forming an exterior of the capacitor, a lead wire connected to the dielectric and extending from an inside of the case to an outside of a first side surface of the case, and a groove recessed on a second side surface of the case opposite to the first side surface and provided to be engaged with a side, which forms a circumference of the hole, of the substrate to allow the case to be inserted and fixed to the hole.

Based on the capacitor being mounted on the substrate, an upper surface of the capacitor may be located above an upper surface of the substrate, and a lower surface of the capacitor may be located below a lower surface of the substrate.

The second side surface of the case may be fixed to the substrate by inserting the substrate into the groove.

The case may include a protrusion protruding from the first side surface to the outside of the case.

The first side surface of the case may be supported on the substrate as the protrusion is in contact with the substrate.

The groove may include a first contact surface in contact with the upper surface of the substrate.

The protrusion may include a second contact surface in contact with the upper surface of the substrate.

The first contact surface and the second contact surface may be arranged on the same plane to allow the capacitor to be horizontally mounted on the substrate.

A distance from an upper surface of the case to an upper surface of the protrusion may be the same as a distance from a lower surface of the case to a lower surface of the protrusion.

The groove may include a first surface provided to be in contact with an upper surface of the substrate, and a second surface provided to be inclined with respect to the first surface to guide an insertion of the substrate into the groove.

The groove may include a first groove and a second groove provided to be vertically symmetrical with respect to a virtual horizontal line dividing the case.

The substrate may further include a wire hole into which the lead wire is inserted.

The lead wire may include a first wire extending from the first side surface of the case, a second wire provided to be inserted into the wire hole, and a protruding member provided to connect the first wire and the second wire and formed to be bent outward of the wire hole.

The protruding member may be formed by being bent in a semicircle.

The substrate may further include a substrate protrusion protruding from the side, which forms the circumference of the hole, of the substrate.

The groove may be provided to correspond to the substrate protrusion to allow the substrate protrusion to be inserted thereinto.

The substrate protrusion may include a first substrate protrusion and a second substrate protrusion provided to be spaced apart from each other on the side.

The first substrate protrusion and the second substrate protrusion may be provided in different sizes.

The groove may include a first groove and a second groove provided to allow the first substrate protrusion and the second substrate protrusion to be inserted thereto, respectively.

Another aspect of the present disclosure provides a capacitor mounted on a substrate including a hole, the capacitor including a case provided to accommodate a dielectric therein and forming an exterior of the capacitor, a lead wire connected to the dielectric and extending from an inside of the case to an outside of the case, and a groove provided on one side surface of the case to allow a side, which forms a circumference of the hole, of the substrate to be inserted thereinto, and including a surface provided to be inclined with respect to the substrate to guide an insertion of the one side of the substrate.

The case may include a protrusion protruding from other side surface of the case to an outside of the case.

The protrusion may fix the other side surface of the case to the substrate by being in contact with the substrate.

The groove may include a first groove and a second groove provided to be vertically symmetrical with respect to a virtual horizontal line diving the case.

The substrate may further include a wire hole into which the lead wire is inserted.

The lead wire may include a first wire extending from one side surface of the case, a second wire provided to be inserted into the wire hole, and a protruding member provided to connect the first wire and the second wire and formed to be bent outward of the wire hole.

Another aspect of the present disclosure provides a capacitor mounted on a substrate including a hole, the capacitor including a case provided to accommodate a dielectric therein and forming an exterior of the capacitor, the case provided to be inserted into the hole, and a lead wire connected to the dielectric and extending from an inside of the case to an outside of the case. The case includes a groove provided on one side surface of the case, and provided to allow a side, which forms the hole, of the substrate to be inserted thereinto so as to fix the one side surface of the case to the substrate, and a protrusion provided in other side surface of the case and provided to be in contact with the substrate so as to fix the other side surface of the case to the substrate.

Embodiments, may provide a capacitor capable of improving a structure of a case of the capacitor so as to reduce the sum of a thickness of a substrate and a thickness of the capacitor mounted the substrate and so as to secure a margin in thickness of the capacitor, and an electronic device including the same.

Further, embodiments provide a substrate including a hole, a capacitor provided to be inserted and fixed in the hole of the substrate, and an electronic device including the same.

Further, embodiments may provide a capacitor provided to be fixed to a substrate without a separate fixing process or subsidiary materials, and an electronic device including the same.

DETAILED DESCRIPTION

Embodiments described in the disclosure and configurations shown in the drawings are merely examples of the embodiments of the disclosure, and may be modified in various different ways at the time of filing of the present application to replace the embodiments and drawings of the disclosure.

In addition, the same reference numerals or signs shown in the drawings of the disclosure indicate elements or components performing substantially the same function. Shapes and sizes of elements in the drawings may be exaggerated for clear description.

Also, the terms used herein are used to describe the embodiments and are not intended to limit and/or restrict the disclosure. The singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. In this disclosure, the terms “including”, “having”, and the like are used to specify features, numbers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more of the features, elements, steps, operations, elements, components, or combinations thereof.

It will be understood that, although the terms first, second, third, etc., may be used herein to describe various elements, but elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the disclosure, a first element may be termed as a second element, and a second element may be termed as a first element. The term of “and/or” includes a plurality of combinations of relevant items or any one item among a plurality of relevant items.

In the following detailed description, the terms of “front”, “rear”, “left side”, “right side” and the like may be defined by the drawings, but the shape and the location of the component is not limited by the term.

The disclosure will be described more fully hereinafter with reference to the accompanying drawings. A first contact surface may refer to a first surface of a groove, and a second contact surface may refer to a lower surface of a protrusion.

An electronic device may include substrates40,70, and70aand capacitors1,2,3,4,5and6provided to be mounted on the substrate.

FIG.1is a perspective view of a capacitor according to one embodiment of the present disclosure.FIG.2is a view of the capacitor shown inFIG.1from another angle.

Referring toFIGS.1and2, a capacitor1according to one embodiment of the present disclosure may include a case10with a substantially rectangular parallelepiped shape, a dielectric provided inside the case10, and a lead wire20connected to the dielectric and extending from an inside of the case10to an outside.

According to one embodiment of the present disclosure, the capacitor1may include a film capacitor. The capacitor1may include a plastic film as a dielectric. A plurality of deposited metals may be formed to be spaced apart from each other on the plastic film, and the plastic film may be provided as a pair. A pair of plastic films may be disposed to be spaced apart from each other by a predetermined distance. The pair of plastic films may be wound while maintaining a distance from each other and accommodated in the case10. The inside of the case10may be filled with a resin such as an epoxy resin or a urethane resin. Particularly, the capacitor1may be manufactured in such a way that after the wound plastic film is placed inside the case10, the lead wire20is connected to each of the pair of plastic films and the inside of the case10is vacuum impregnated with a resin such as an epoxy resin or a urethane resin. Hereinafter a film capacitor will be described as an example of the capacitor, but the present disclosure is not limited thereto. The present disclosure may be applied to various types of capacitors.

Referring toFIGS.1and2, the capacitor1according to one embodiment of the present disclosure may include the case10.

The case10may be provided in a substantially rectangular parallelepiped shape. The case10may include an upper surface11, a lower surface12, and side surfaces13and14. Four side surfaces may be provided at the case10, but for convenience of description, reference numbers are given only to the two side surfaces13and14on which the lead wire20and a groove50are provided.

Hereinafter one side surface of the case10in which the lead wire20is arranged is referred to as a first side surface13, and the other side surface of the case10in which the groove50is formed is referred to as a second side surface14.

The lead wire20may be electrically connected to a dielectric (not shown) provided inside the case10. The lead wire20may extend from the inside of the case10to the outside of the first side surface13of the case10. The lead wire20may extend from the inside of the case10to the outside of the case10by passing through the first side surface13.

The lead wire20may be provided as a pair. The lead wire20may include a first lead wire21and a second lead wire22. The lead wire20may electrically connect the substrate40and the dielectric by being soldered to the substrate40(refer toFIG.3) to be described later.

According to one embodiment of the present disclosure, the capacitor1may include a protrusion30formed at the case10.

As shownFIGS.1and2, the protrusion30may be provided as a pair. The protrusion30may include a first protrusion31and a second protrusion32. However, the present disclosure is not limited thereto. Alternatively, one or three of more of the protrusions may be provided.

The protrusion30may be provided on the first side surface13of the case10. The protrusion30may be formed on a side surface on which the lead wire20is provided. The protrusion30may be formed to protrude from the first side surface13toward the outside of the case10. The protrusion30may be provided to support one side surface of the case10when the capacitor1is inserted into a hole41of the substrate40. This will be described later.

The groove50may be provided on the second side surface14corresponding to the other side surface of the case10. In other words, the case10may include the groove50provided on the second side surface14. According to one embodiment of the present disclosure, the groove50may be provided to cross the second side surface14of the case10in a cross direction in the drawing. In other words, the groove50may be provided to cross the second side surface14of the case10in a horizontal direction. The groove50may be provided to support the other side surface of the case10when the capacitor1is inserted into the hole41of the substrate40. This will be described later.

FIG.3is a perspective view of the capacitor and the substrate according to one embodiment of the present disclosure, particularly illustrating a state before the capacitor is mounted on the substrate.FIG.4is a perspective view of the capacitor and the substrate according to one embodiment of the present disclosure, particularly illustrating a state after the capacitor is mounted on the substrate.

Referring toFIGS.3and4, the capacitor1according to one embodiment of the present disclosure may be mounted on the substrate40.

The capacitor1may be mounted on the substrate40on which the capacitor hole41is formed. The capacitor hole41may be formed to penetrate the substrate40. The capacitor hole41may be provided in accordance with the size of the case10.

Although the substrate40is shown to be small in the drawings, the actual substrate40may be provided larger. The substrate40may include the capacitor hole41into which the capacitor1is inserted, and wire holes44and45into which the lead wire20is inserted. The wire holes44and45may include a first wire hole44through which the first lead wire21is inserted and a second wire hole45through which the second lead wire22is inserted. Based on the capacitor1being mounted on the substrate40, the substrate40may include a first substrate surface43in contact with the first side surface13of the case10and a second substrate surface42in contact with the second side surface14of the case10. Hereinafter the first substrate surface43may be referred to as one surface, which forms the capacitor hole41, of the substrate40. In addition, the second substrate surface42may be referred to as the other surface, which forms the capacitor hole41, of the substrate40.

As shown inFIG.4, the capacitor1may be inserted into the capacitor hole41of the substrate40. The capacitor1in a state of being inserted into the capacitor hole41may be mounted on the substrate40. The capacitor1may be fixed to the substrate40by being inserted into the capacitor hole41.

FIG.5is a side view of the capacitor and the substrate according to one embodiment of the present disclosure, particularly illustrating a state before the capacitor is mounted on the substrate.FIG.6is a side view of the capacitor and the substrate according to one embodiment of the present disclosure, particularly illustrating a state after the capacitor is mounted on the substrate.

Hereinafter a process of mounting the capacitor1to the substrate40according to one embodiment of the present disclosure will be described in detail with reference toFIGS.5and6.

As shown inFIGS.5and6, the capacitor1may be inserted into the capacitor hole41of the substrate40by moving the capacitor1obliquely with respect to the substrate40. Particularly, the groove50of the capacitor1may face the second substrate surface42of the substrate40, and the capacitor1may be moved obliquely with respect to the substrate40to allow the second substrate surface42to be inserted into the groove50. When the groove50is engaged with the second substrate surface42, the case10may be moved to allow the lead wire20to be inserted into the wire holes44and45. At this time, the case10may be rotated using the groove50as a rotation axis. By the above-mentioned process, the capacitor1may be inserted into the capacitor hole41of the substrate40and mounted on the substrate40. In addition, the first lead wire21may be inserted into the first wire hole44, and the second lead wire22may be inserted into the second wire hole45. An end of the first lead wire21may protrude under a lower surface40bof the substrate40by passing through the first wire hole44. An end of the second lead wire22may protrude under the lower surface40bof the substrate40by passing through the second wire hole45.

According to one embodiment of the present disclosure, based on the case10being mounted on the substrate40, the groove50may include a first surface51provided in parallel with the substrate40, a second surface52provided to be inclined at a predetermined angle with respect to the substrate40, and a third surface53connecting the first surface51and the second surface52. The second surface52may be provided to be inclined with respect to the first surface51to guide the insertion of the substrate40into the groove50.

Due to the second surface52of the groove50, the second substrate surface42of the substrate40may be smoothly inserted into the groove50. Because the second surface52is inclined with respect to the first surface51, one end of the groove50may have a greater width than the other end of the groove50. At this time, one end of the groove50may correspond to an opened-side of the groove50, and the other end of the groove50may correspond to the third surface53. In addition, a width may correspond to the size of the groove50in the vertical direction.

With the above-mentioned structure, the second substrate surface42may be inserted into the groove50through the opened-one side of the groove50having a relatively large width. Because the width of the opened-one side of the groove50is greater than the thickness of the substrate40, the second substrate surface42may be smoothly inserted into the groove50. Further, due to the second surface52of the groove50, the groove50may be provided in a shape that gradually decreases in width from one side thereof to the other side thereof. The width of the groove50at the third surface53corresponding to the other side of the groove50may be substantially the same as the width of the substrate40. When the capacitor1is mounted on the substrate40, the second substrate surface42may be in contact with the third surface53. Alternatively, when the capacitor1is mounted on the substrate40, a gap in the horizontal direction between the second substrate surface42and the third surface53may be very small. As described above, because the width of the second substrate surface42and the width of the third surface53are substantially the same, the groove50may be stably engaged with the substrate40without a gap. As the second substrate surface42is inserted into the groove50and engaged with each other, the second surface14of the case10may be fixed to the substrate40.

According to one embodiment of the present disclosure, the protrusion30may include the first protrusion31and the second protrusion as mentioned above. The first protrusion31may include an upper surface31aand a lower surface31b.Although not shown in the drawing, the second protrusion32may include an upper surface and a lower surface as the same manner as the first protrusion31. Hereinafter the first protrusion31will be described as an example.

As shown inFIG.6, the first protrusion31may be provided to allow the lower surface31bof the first protrusion31to be in contact with the upper surface40aof the substrate40. When the capacitor1is inserted into the capacitor hole41of the substrate40, the lower surface31bof the first protrusion31may come into contact with the upper surface40aof the substrate40so as to prevent the capacitor1from passing through the capacitor hole41. Because the lower surface31bof the first protrusion31is in contact with the upper surface40aof the substrate40, the capacitor1may be horizontally mounted on the substrate40. For this, the first surface51of the groove50and the lower surface31bof the first protrusion31may be provided to be substantially on the same plane. Although not shown in the drawings, the lower surface of the second protrusion32may also be provided to be in contact with the upper surface40aof the substrate40in the same manner as the first protrusion31.

When the lower surface31bof the first protrusion31is in contact with the upper surface40aof the substrate40, the first side surface13and the first substrate surface43may be in contact with each other. As the first side surface13of the case10is in contact with the first substrate surface43and the second side surface14of the case10is in contact with the second substrate surface42, the case10may be inserted and fixed to the capacitor hole41.

In addition, as shown inFIG.6, the end of the first lead wire21may protrude to the lower surface40bof the substrate40by passing through the first wire hole44. A soldering process may be performed on the lower surface40bof the substrate40to electrically connect the first lead wire21and the substrate40. A solder S may electrically connect the substrate40and the first lead wire21. Because the substrate40and the first lead wire21are electrically connected, the substrate40and the dielectric inside the case10may be electrically connected. Although not shown in the drawings, the second lead wire22may also be electrically connected to the substrate40by solder.

Capacitors are used in various electronic products and are also used in television (TV). In recent years, research on ultra-slim TV has been continuously conducted, and there is a growing need of the reduction in thickness of the substrate to which the capacitor is mounted. However, the capacitance of the capacitor may be reduced when the thickness of the capacitor is reduced while maintain a cross-sectional area.

According to the present disclosure, it is possible to reduce the sum of the thickness of the substrate and the thickness of the capacitor mounted on the substrate while maintaining the thickness of the capacitor or minimizing the reduction in thickness of the capacitor.

In the conventional manner, the capacitor is mounted on one surface of the substrate. The capacitor is mounted on one surface of the substrate and an adhesive such as silicone is used to fix the capacitor to the substrate. Because the capacitor in the conventional manner is mounted on the substrate, the thickness of the capacitor mounted on the substrate corresponds to the sum of the thickness of the substrate, the thickness of the capacitor and the thickness of the adhesive.

According to the present disclosure, the capacitor may be inserted and fixed to the hole formed at the substrate. The upper surface of the capacitor may be provided to be positioned above the upper surface of the substrate, and the lower surface of the capacitor may be provided to be positioned below the lower surface of the substrate. In addition, in fixing the capacitor to the substrate, a separate subsidiary material such as silicon may not be required. According to the present disclosure, the sum of the thickness of the substrate and the thickness of the capacitor mounted to the substrate may be less than the sum of the thicknesses of the capacitor and the thicknesses of the substrate. Although the capacitor according to the present disclosure substantially has the same thickness and the same capacitance as the capacitor in the conventional manner, the sum of the thickness of the substrate and the thickness of the capacitor mounted on the substrate may be reduced in comparison with the conventional manner. Accordingly, it may be possible to reduce the thickness of the electronic products in which the capacitor is used. In addition, because a separate subsidiary material is not required to fix the capacitor to the substrate, it may be possible to reduce the production cost.

FIG.7is an enlarged view of part A shown inFIG.6.

An inclination angle of the second surface52of the groove50according to one embodiment of the present disclosure will be described with reference toFIG.7.

As described above, the groove50may include the first surface51provided horizontally and the second surface52provided to be inclined with respect to the first surface. Because the second surface52is provided to be inclined with respect to the first surface51, coupling between the groove50and the substrate40may be facilitated. However, when an inclination angle α between the second surface52and the first surface51is relatively large, the substrate40inserted into the groove50may not be stably fixed. In a state in which the inclination angle α between the second surface52and the first surface51is relatively small, the substrate40may be damaged when the substrate40is inserted into the groove50.

According to one embodiment of the present disclosure, in order to stably fix the substrate40inserted into the groove50and in order to easily couple the groove50and the substrate40, it is appropriate that the inclination angle α between the first surface51and the second surface52is provided in a range of 4° to 10°. That is, it is appropriate that the inclination angle α is 4°≤α≤10°.

FIG.8is a perspective view of a capacitor according to another embodiment of the present disclosure.FIG.9is a perspective view of the capacitor and the substrate according to another embodiment of the present disclosure, particularly illustrating a state before the capacitor is mounted on the substrate.

As shown inFIGS.8and9, according to another embodiment of the present disclosure, a capacitor2may include a pair of grooves50and60. Configurations other than the pair of grooves50and60are the same as those of the embodiment shown inFIGS.1to7, and thus descriptions thereof will be omitted.

According to another embodiment of the present disclosure, the capacitor2may include a first groove50and a second groove60. The first groove50and the second groove60may be provided on the second side surface14of the case10. The first groove50and the second groove60may be provided to be vertically spaced apart.

FIG.10is a side view of the capacitor and the substrate according to another embodiment of the present disclosure, particularly illustrating a state before the capacitor is fixed to the substrate.FIG.11is a side view of the capacitor and the substrate according to another embodiment of the present disclosure, particularly illustrating a state after the capacitor is fixed to the substrate.

Referring toFIGS.10and11, the capacitor2may include the first groove50and the second groove60. One of the first groove50and the second groove60may be engaged with the substrate40. Particularly, the substrate40may be engaged with the first groove50or the second groove60according to a direction in which the lead wire20is bent. In other words, the second substrate surface42of the substrate40may be inserted into the first groove50or the second groove60.

According to another embodiment of the present disclosure, because the capacitor2includes the first groove50and the second groove60, a degree of freedom in a bending direction of the lead wire20may be increased. According to another embodiment of the present disclosure, the case10of the capacitor2may be provided vertically symmetrically with respect to a virtual center line extending in the horizontal direction. Accordingly, a second surface62of the second groove60may be provided to be positioned above a first surface61in the drawing, which is different from the first groove50. In addition, a distance from the upper surface11of the case10to the upper surface31aof the first protrusion31may be the same as a distance from the lower surface12of the case10to the lower surface31bof the first protrusion31.

The first groove50and the second groove60include the same structure, and thus when the lead wire20is bent upwardly in the drawings, the capacitor2may be mounted on the substrate40in such a way that the second groove60is arranged to face the lower side. Alternatively, as shown inFIGS.10and11, when the lead wire20is bent downward in the drawing, the capacitor2may be mounted on the substrate40in such a way that the first groove50is arranged to face the lower side.

When the bending direction of the lead wire20is predetermined and the lead wire20is bent in only one direction, the productivity may be reduced. On the other hand, when the bending direction of the lead wire20is not determined, the productivity may be increased. According to another embodiment of the present disclosure, the bending direction of the lead wire20is not predetermined and thus the productivity of the capacitor2may be increased.

FIG.12is a perspective view of a capacitor according to still another embodiment of the present disclosure.FIG.13is a view illustrating the capacitor shown inFIG.12from another angle.

Referring toFIGS.12and13, according to still another embodiment of the present disclosure, a capacitor3may include a lead wire20aincluding a protruding member25aformed by a lead forming process. The capacitor3may not include a protrusion provided on the first surface13of the case10. Configurations other than the lead wire20aand the protrusion of the case are the same as those of the embodiment shown inFIGS.1to7, and thus descriptions thereof will be omitted.

FIG.14is a perspective view of the capacitor and the substrate according to still another embodiment of the present disclosure, particularly illustrating a state before the capacitor is mounted on the substrate.FIG.15is a perspective view of the capacitor and the substrate according to still another embodiment of the present disclosure, particularly illustrating a state after the capacitor is mounted on the substrate.FIG.16is a side view of the capacitor and the substrate according to still another embodiment of the present disclosure, particularly illustrating a state before the capacitor is mounted on the substrate.FIG.17is a side view of the capacitor and the substrate according to still another embodiment of the present disclosure, particularly illustrating a state after the capacitor is mounted on the substrate.

Referring toFIGS.14to17, the capacitor3according to still another embodiment of the present disclosure may include the lead wire20a.The lead wire20amay include a first lead wire21aand a second lead wire22a.Because the first lead wire21aand the second lead wire22ahave the same structure, the first lead wire21awill be described as an example.

The first lead wire21amay include a first wire23aextending to the outside of the case10by passing through the first side surface13of the case10, and a second wire24aprovided to pass through a first wire hole44of the substrate40, and a protruding member25aconnecting the first wire23aand the second wire24a.

The first wire23amay extend substantially horizontally to the substrate40, and the second wire24amay extend substantially perpendicular to the substrate40.

The protruding member25amay be provided to connect one end of the first wire23aand one end of the second wire24a.The protruding member25amay be formed in a substantially semicircular shape by a lead forming process. The protruding member25amay be provided to include a portion protruding outward than the second wire24ain a lateral side on the drawings with respect to the first surface13of the case10. The protruding member25amay be bent to protrude outward of the first wire hole44. The protruding member25amay allow only from one end of the second wire24ato the other end of the second wire24ato be inserted or passed through the first wire hole44. The protruding member25amay not be inserted into the first wire hole44by including the portion protruding further than the second wire24ain the horizontal direction. The first wire hole44may extend in the vertical direction, and a width in the left and right direction of the first wire hole44may be slightly greater than the thickness of the second wire24a.The protruding member25amay be connected to the upper end of the second wire24aand bent outward from the upper end thereof. With the structure, the second wire24aextending in the vertical direction may pass or be inserted into the first wire hole44, and the protruding member25amay be located above the upper surface40aof the substrate40.

The protruding member25amay perform a function similar to that of the protrusion30illustrated inFIGS.1to7. The protruding member25amay be provided to allow one end of the protruding member25aconnected to the second wire24ato be in contact with the upper surface40aof the substrate40. The capacitor3may be horizontally mounted on the substrate40as the protruding member25ais in contact with the upper surface40aof the substrate40. As the protruding member25acomes into contact with the upper surface40aof the substrate40, the capacitor3may not pass through the capacitor hole41.

FIG.18is a perspective view of a capacitor according to still another embodiment of the present disclosure.FIG.19is a perspective view of the capacitor and the substrate according to still another embodiment of the present disclosure, particularly illustrating a state before the capacitor is mounted on the substrate.

Referring toFIGS.18and19, according to still another embodiment of the present disclosure, a capacitor4may include a pair of grooves50and60. Configurations other than the grooves50and60are the same as those of the embodiment shown inFIGS.12to17, and thus descriptions thereof will be omitted.

According to still another embodiment of the present disclosure, the capacitor4may include a first groove50and a second groove60. The first groove50and the second groove60may be provided on the second side surface14of the case10. The first groove50and the second groove60may be provided to be vertically spaced apart.

FIG.20is a side view of the capacitor and the substrate according to still another embodiment of the present disclosure, particularly illustrating a state before the capacitor is fixed to the substrate.FIG.21is a side view of the capacitor and the substrate according to still another embodiment of the present disclosure, particularly illustrating a state after the capacitor is fixed to the substrate.

Referring toFIGS.20and21, the capacitor4according to still another embodiment of the present disclosure may include the first groove50and the second groove60, and one of the first groove50and the second groove60may be engaged with the substrate40. Particularly, the first groove50or the second groove60may be coupled to the substrate40according to the direction in which the lead wire20ais bent. In other words, the second surface42of the substrate40may be inserted into the first groove50or the second groove60.

According to still another embodiment of the present disclosure, because the capacitor4includes the first groove50and the second groove60, a degree of freedom in a bending direction of the lead wire20amay be increased. According to still another embodiment of the present disclosure, the case10of the capacitor4may be provided vertically symmetrically with respect to a virtual center line extending in the horizontal direction. Accordingly, the second surface62of the second groove60may be provided to be positioned above the first surface61in the drawing, which is different from the first groove50.

The first groove50and the second groove60include the same structure, and thus when the lead wire20ais bent upwardly on the drawing, the capacitor4may be mounted on the substrate40in such a way that the second groove60is arranged to face the lower side. Alternatively, as shown inFIGS.20and21, when the lead wire20ais bent downward in the drawing, the capacitor4may be mounted on the substrate40in such a way that the first groove50is arranged to face the lower side.

When the bending direction of the lead wire20ais predetermined and the lead wire20ais bent in only one direction, the productivity may be reduced. On the other hand, when the bending direction of the lead wire20ais not determined, the productivity may be increased. According to still another embodiment of the present disclosure, the bending direction of the lead wire20ais not predetermined and thus the productivity of the capacitor4may be increased.

FIG.22is a view illustrating a capacitor and a substrate according to still another embodiment of the present disclosure.FIG.22illustrates a top plan view of a substrate70according to still another embodiment of the present disclosure and a side view of a capacitor5according to still another embodiment of the present disclosure.

According to still another embodiment of the present disclosure, the substrate70may include a capacitor hole71through which the capacitor5is inserted. In addition, the substrate70may include a first substrate surface72forming a circumference of the capacitor hole71and a second substrate surface73provided to face the first substrate surface72. In addition, the substrate70may include a first wire hole74and a second wire hole75into which a first lead wire (not shown) and a second lead wire (not shown) are inserted.

According to still another embodiment of the present disclosure, the substrate70may include substrate protrusions76and77. The substrate protrusions76and77may include a first substrate protrusion76and a second substrate protrusion77provided to be spaced apart from each other. However, the present disclosure is not limited thereto, and one or three or more substrate protrusions may be provided.

According to still another embodiment of the present disclosure, the capacitor5may include a groove80. The groove80may include a first groove81and a second groove82into which the first substrate protrusion76and the second substrate protrusion77are inserted, respectively. In addition, the groove80may include a third groove83and a fourth groove84provided to be vertically spaced apart from the first groove81and the second groove82that is regardless of the bending direction of the lead wire (not shown). However, it is not limited thereto, and thus the groove80may include only the first groove and the second groove.

According to still another embodiment of the present disclosure, the substrate70may include the first substrate protrusion76and the second substrate protrusion77having the same size. The capacitor5may include the first and second grooves81and82respectively corresponding to the first and second substrate protrusions76and77. Because the first substrate protrusion76is inserted into the first groove81and the second substrate protrusion77is inserted into the second groove82, the gap in the left and right direction may be reduced when the capacitor5is mounted on the substrate70. The coupling force of the capacitor5to the substrate70may be improved. Even if vibration occurs in the substrate70, the capacitor5may be stably coupled to the substrate70.

Meanwhile, although not shown in the drawings, the substrate may include a single substrate protrusion, and the capacitor may include a groove corresponding to the substrate protrusion. At this time, the size of the substrate protrusion may be different from the size of the groove in order to distinguish the capacitor from the capacitor having the same size but having different capacitance. For example, a small groove may be provided in a capacitor having a small capacitance, and a small substrate protrusion may be provided in the substrate. A large groove may be provided in a capacitor having a large capacitance, and a large substrate protrusion may be provided in the substrate. Accordingly, capacitors having different capacitance but having the same size may be easily distinguished.

FIG.23is a view illustrating a capacitor and a substrate according to still another embodiment of the present disclosure.

According to still another embodiment of the present disclosure, a substrate70amay include a capacitor hole71athrough which a capacitor6is inserted. In addition, the substrate70amay include a first substrate surface72aforming a circumference of the capacitor hole71aand a second substrate surface73aprovided to face the first substrate surface72a.In addition, the substrate70amay include a first wire hole74aand a second wire hole75ainto which a first lead wire (not shown) and a second lead wire (not shown) are inserted.

According to still another embodiment of the present disclosure, the substrate70amay include substrate protrusions76aand77a.The substrate protrusions76aand77amay include a first substrate protrusion76aand a second substrate protrusion77aprovided to be spaced apart from each other and provided to have different sizes.

According to still another embodiment of the present disclosure, the capacitor6may include a groove80a.The groove80amay include a first groove81aand a second groove82ainto which the first substrate protrusion76aand the second substrate protrusion77aare respectively inserted. In addition, the groove80amay include a third groove83aand a fourth groove84aprovided to be vertically spaced apart from the first groove81aand the second groove82athat is regardless of the bending direction of the lead wire (not shown). However, it is not limited thereto, and thus the groove80amay include only the first groove and the second groove.

According to still another embodiment of the present disclosure, the first substrate protrusion76aand the second substrate protrusion77amay be provided to have different sizes, and the first groove81aand the second groove82amay be provided to have a size in accordance with the size of the first substrate protrusion76aand the second substrate protrusion77a,respectively. The first substrate protrusion76amay be inserted into the first groove81a,and the second substrate protrusion77amay be inserted into the second groove82a.However, the second substrate protrusion77amay not be inserted into the first groove81a,and the first substrate protrusion76amay not be inserted into the second groove82a.Accordingly, in order to mount the capacitor6to the substrate70a,a user must insert the first substrate protrusion76ainto the first groove81aand the second substrate protrusion77ainto the second groove82aaccording to the size of the substrate protrusion and the groove. This structure is useful when it is required to distinguish between a polarity of the first lead wire and a polarity of the second lead wire. This is because it may be difficult to mount the substrate protrusion to the groove with the opposite polarity because the coupling direction of the groove and the substrate protrusion is determined.