KR101969381B1 - Card connector - Google Patents

Abstract

A card connector is provided. The card connector includes a card connector for receiving a card inserted along a first direction, the card connector comprising: a plurality of contacts in electrical contact with a card; and a base for fixing each contact, wherein each contact is disposed A first elastic arm which connects the contact portion to the base and includes a first opening and a second elastic arm which is spaced apart from the first elastic arm in the first direction to connect the contact portion to the base, And a second elastic arm including two openings.

Description

Card connector {CARD CONNECTOR}

The present invention relates to a card connector. Specifically, the present invention relates to a card connector for accommodating an electric card such as a nano SIM card or the like.

An electric card such as an external memory card can be mounted on a portable terminal such as a mobile communication terminal, a digital camera, an MP3 player, and a PMP to store data such as a moving picture file music file, an image file, and a text file. A portable terminal or the like is provided with a card connector for mounting such an electric card.

Electric cards are becoming smaller and smaller. For example, miniaturized nano SIM cards have been adopted for portable terminals, such as a micro SIM (Subscriber Identification Module) card.

However, the miniaturized electric card tends to cause damage to the card connector. For example, in the process of inserting or ejecting a nano SIM card, the contact of the card connector that is in electrical contact with the nano SIM card tends to buckle or break.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a card connector in which a contact of a card connector is prevented from being deformed or broken to improve product reliability.

Another object of the present invention is to provide a card connector with improved product reliability by preventing buckling or breakage of a contact of a card connector.

The technical objects of the present invention are not limited to the technical matters mentioned above, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a card connector for receiving a card inserted along a first direction, the card connector comprising: a plurality of contacts in electrical contact with a card; Each contact having a contact portion directly contacting the card, the contact portion being disposed above the base, the first elastic arm connecting the contact portion to the base and including a first opening, And a second resilient arm spaced apart from the first resilient arm in a first direction to connect the contact portion to the base and including a second opening.

In some embodiments, the first resilient arm includes a first support portion extending from the base in a second direction intersecting the first direction, and a first guide portion connecting the first support portion to the contact portion, A second support portion extending from the base in a second direction, and a second guide portion connecting the second support portion to the contact portion.

In some embodiments, the first opening extends over the first support portion and the first guide portion, and the second opening extends over the second support portion and the second guide portion.

In some embodiments, the top surface of the first support and the top surface of the first guide define an angle greater than 90 degrees and less than 180 degrees.

In some embodiments, the second direction is perpendicular to the first direction.

In some embodiments, the first and second resilient arms have a shape that is symmetrical with respect to a plane passing through the contact portion and intersecting the first direction.

In some embodiments, the first and second openings each extend to the base.

In some embodiments, both edges of the contact in the first direction have a shape that bends downwardly.

According to another aspect of the present invention, there is provided a card connector for receiving a card inserted along a first direction, comprising: a plurality of contacts in electrical contact with a card; Wherein each contact comprises a contact disposed directly above the base and disposed above the base, a first resilient arm connecting the contact to the base, a first resilient arm and a first resilient arm, And a second elastic arm spaced apart from the first elastic arm and connecting the contact to the base, the first elastic arm comprising: a first sub-elastic arm extending from the base in a second direction intersecting the first direction; And a second sub elastic arm spaced apart in the first direction and extending from the base in the second direction.

In some embodiments, the second resilient arm includes a third sub-resilient arm extending in a second direction from the base, and a fourth sub-resilient arm extending in a second direction away from the base in a first direction, Cancer.

In some embodiments, the first and second resilient arms have a shape that is symmetrical to each other with respect to a plane extending through the contact and extending in the second direction.

In some embodiments, the width of the first subelastic arm in the second direction is greater than the width of the second subelastic arm in the second direction.

In some embodiments, both edges of the contact in the first direction have a shape that bends downwardly.

The details of other embodiments are included in the detailed description and drawings.

The card connector according to some embodiments of the technical idea of the present invention may include an elastic arm including an opening to prevent buckling or breakage of the contact.

The card connector according to some embodiments of the technical idea of the present invention may include an elastic arm including a plurality of sub elastic arms to prevent buckling or breakage of the contact.

1 is a perspective view of a card connector and an electrical card assembly in accordance with some embodiments of the technical aspects of the present invention.
2 is a partially exploded perspective view of the card connector and electrical card assembly of FIG. 1;
FIG. 3 is a view showing the electric card assembly of FIGS. 1 and 2 in an inverted state.
Fig. 4 is a view showing the metal structure of Fig. 2. Fig.
5 is a perspective view of a contact according to some embodiments of the inventive concepts.
6 is a cross-sectional view taken along line A-A 'in Fig.
7 is a cross-sectional view taken along line B-B 'in Fig.
Figure 8 is a perspective view of a contact according to some embodiments of the inventive concepts.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

It is to be understood that when an element is referred to as being "connected to" or "coupled to" another element, it can be directly connected or coupled to another element, One case. On the other hand, when an element is referred to as being " directly coupled to " or " directly coupled to " another element, it means that it does not intervene in another element. &Quot; and / or " include each and every combination of one or more of the mentioned items.

It is to be understood that an element is referred to as being " on " or " on " of another element includes both elements immediately above and beyond other elements. On the other hand, when an element is referred to as being " directly on " or " directly above " another element, it means that it does not intervene another element in the middle.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" Can be used to easily describe the correlation of components with other components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element . Thus, the exemplary term " below " can include both downward and upward directions. The components can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

Hereinafter, referring to Figs. 1 to 4, a card connector according to some embodiments of the technical idea of the present invention will be described.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a card connector and an electrical card according to some embodiments of the present invention. Fig. 2 is a partially exploded perspective view of the card connector and the electric card of Fig. 1; 3 is a diagram showing the electric card of FIG. 2 in an inverted state. Fig. 4 is a view showing the metal structure of Fig. 2. Fig.

Referring to Figs. 1 and 2, a card connector 10 includes a metal structure 100, a base 200, and a shield case 300. In addition, the electric card assembly 20 includes a card 400 and a card tray 500. At this time, the card connector 10 can receive the electric card assembly 20 along the first direction X. [

The metal structure 100 may be fixed by the base 200. The metal structure 100 may also be in electrical contact with the electrical card assembly 20 inserted along the first direction X. [

Specifically, the metal structure 100 can be in electrical contact with the card 400 of the electric card assembly 20. [ Referring to FIG. 3, the card 400 may include a metal terminal 410 on its back surface. The metal structure 100 is in contact with the metal terminal 410 of the card 400 and can make electrical contact with the card 400. [

4, the metal structure 100 may include a plurality of contacts 110, a mounting portion 120, and a connection portion 130. As shown in FIG.

The plurality of contacts 110 are portions of the metal structure 100 that are in contact with the metal terminals 410 of the card 400. Each of the contacts 110 may extend in a direction opposite to the second direction Y or the second direction Y that intersects the first direction X, as shown in Fig. Each of the contacts 110 may have a shape protruding in a third direction Z intersecting with the first and second directions X and Y. [ This will be described later in detail with reference to Figs. 5 to 7.

Here, the second direction Y may be perpendicular to the first direction X, and the third direction Z may be perpendicular to the first and second directions X and Y. [ However, the technical idea of the present invention is not limited thereto, and the first to third directions (X, Y, Z) may be a concept covering all directions which are not parallel to each other.

The mounting portion 120 is a portion of the metal structure 100 fixed to a circuit board (not shown) on which the card connector 10 is disposed. For example, the mounting portion 120 may be fixed to the circuit board by soldering or the like. Accordingly, the metal structure 100 can be electrically connected to the circuit board to input and output electrical signals. For example, the metal structure 100 in contact with the card 400 can input and output data electrical signals and / or power electrical signals between the card 400 and the circuit board.

The connection portion 130 is a portion of the metal structure 100 fixed by the base 200. For example, as shown in FIG. 2, the metal structure 100 may be fixed to the base 200 surrounding a part of the connection portion 130. Also, the connection unit 130 can electrically connect the plurality of contacts 110. That is, each of the contacts 110 may be electrically connected to each other by the connection part 130. [

Referring again to FIG. 2, as described above, the base 200 may fix the metal structure 100. That is, the metal structure 100, which is in electrical contact with the electric card assembly 20, can be fixed by the base 200. In addition, the base 200 may comprise an insulating material. Accordingly, the base 200 can be electrically insulated from the metal structure 100.

The base 200 may expose a portion of the metal structure 100. 2, the contact 110 may have a shape exposed from the base 200 and protruding from the lower surface of the base 200 in the third direction Z. As shown in Fig.

The shield case 300 may be disposed on the base 200. Accordingly, the shield case 300 can provide a space for accommodating the electric card assembly 20 together with the base 200. [ Specifically, the electric card assembly 20 accommodated along the first direction X may be interposed between the base 200 and the shield case 300.

As described above, the contact 110 exposed from the base 200 may protrude in the third direction Z and face the shield case 300. That is, a part of the contact 110 may be disposed in a space formed by the base 200 and the shield case 300. At this time, the contact 110 may be elastically deformed along the up-down direction. The metal structure 100 can be in electrical contact with the metal terminal 410 of the card 400 inserted along the first direction X. [

The card 400 may be a memory card for storing data such as a moving picture file music file, an image file, a text file, and the like on a portable terminal such as a mobile communication terminal, a digital camera, an MP3 player, and a PMP. For example, the card 400 may be a nano SIM card. However, the technical idea of the present invention is not limited thereto, and the card 400 may be a micro SIM card or an SD card.

The card tray 500 can receive the card 400. Further, the card tray 500 can be inserted into the card connector 10 along the first direction X or ejected from the card connector 10. That is, the card 400 can be moved by the card tray 500, inserted into the card connector 10, or ejected from the card connector 10.

In addition, the card tray 500 can accommodate two or more cards 400. That is, the electric card assembly 20 may include two or more cards 400. For example, the electrical card assembly 20 may be a dual nano SIM card assembly.

Hereinafter, with reference to Figs. 5 to 7, a contact according to some embodiments of the technical idea of the present invention will be described. For convenience of explanation, the parts overlapping with those described with reference to Figs. 1 to 4 will be briefly explained or omitted.

5 is a perspective view of a contact according to some embodiments of the inventive concepts. 6 is a cross-sectional view taken along line A-A 'in Fig. 7 is a cross-sectional view taken along line B-B 'in Fig.

Here, FIG. 5 is an enlarged view of a part of the contact 110 and the base 200 of FIG.

5 through 7, the contact 110 includes a contact portion 112, a first resilient arm 114, and a second resilient arm 116. [

The contact portion 112 may be disposed higher than the base 200. [ Specifically, the contact portion 112 may be disposed so as to protrude in the third direction Z from the plane where the upper surface of the base 200 is disposed.

Accordingly, the contact portion 112 can be electrically contacted with the electric card assembly (20 in Fig. 1) inserted in the card connector (10 in Fig. 1) along the first direction X. [ Specifically, the contact portion 112 can be in electrical contact with the metal terminal (410 in Fig. 3) of the electric card (400 in Fig. 3).

The first elastic arm 114 may be connected to the contact portion 112 and the base 200. That is, the first elastic arm 114 may connect the contact portion 112 to the base 200. The second elastic arm 116 may be spaced apart from the first elastic arm 114 in the first direction X and may be connected to the contact portion 112 and the base 200. Accordingly, the contact portion 112 can be fixed to the base 200 by the first and second elastic arms 114 and 116.

The first and second resilient arms 114 and 116 may be resiliently deformed in an up-to-down direction. Specifically, when the electrical card assembly 20 is inserted into the card connector 10 along the first direction X, the first and second resilient arms 114, 116 are in contact with the electrical card assembly 20 You can be under pressure. Accordingly, the first and second elastic arms 114 and 116 can be elastically deformed in a direction opposite to the third direction Z, respectively. Conversely, when the inserted electric card assembly 20 is ejected from the card connector 10 along the direction opposite to the first direction X, the first and second elastic arms 114, And can be elastically deformed in the direction Z. Fig. Accordingly, the first and second elastic arms 114 and 116 can maintain the shape before being deformed by the electric card assembly 20.

The first elastic arm 114 may include a first support portion 114a and a first guide portion 114b. The first support portion 114a may be a portion of the first elastic arm 114 extending from the base 200 in the second direction Y. [ The first guide portion 114b may be a portion of the first elastic arm 114 connected to the first support portion 114a and connecting the first support portion 114a to the contact portion 112. [ Accordingly, the first elastic arm 114 may have a shape continuously extending from the base 200. Likewise, the second resilient arm 116 may include a second support portion 116a and a second guide portion 116b.

The upper surface of the first support portion 114a and the upper surface of the first guide portion 114b may not be disposed on the same plane. Similarly, the upper surface of the second support portion 116a and the upper surface of the second guide portion 116b may not be disposed on the same plane.

6, since the contact portion 112 is disposed higher than the base 200, the upper surface of the second support portion 116a and the upper surface of the second guide portion 116b can form a first angle? have. Here, the first angle? May be greater than 90 degrees and less than 180 degrees. That is, the contact portion 112 can be disposed higher than the base 200 by the second guide portion 116b forming the first angle? With the second support portion 116a.

In some embodiments, the edge of the contact portion 112 may have a downwardly curved shape. Specifically, as shown in Fig. 7, both edges of the contact portion 112 in the first direction X may each have a shape bent downward. Hereinafter, this shape is referred to as a chamfer. The electric card assembly 20 inserted or discharged in the direction opposite to the first direction X or the first direction X can be slidably contacted with the contact portion 112 by the chamfer. That is, the chamfer can prevent buckling or breakage of a contact that may occur during insertion or ejection of the electric card. As shown in Fig. 7, the chamfer may extend to the edges of the first and second guide portions 114b and 116b.

The first resilient arm 114 may also include a first opening O1. The first opening (O1) may extend in the first resilient arm (114). Specifically, the first opening O1 may extend over the first support portion 114a and the first guide portion 114b. Likewise, the second resilient arm 116 may include a second opening O2. 5, the first and second openings O1 and O2 are shown as being elliptical, but the technical idea of the present invention is not limited thereto. The first and second openings O1 and O2 may have various shapes Lt; / RTI >

In some embodiments, the first resilient arm 114 and the second resilient arm 116 may have a shape that is symmetrical to each other. For example, the first elastic arm 114 and the second elastic arm 116 may extend in a plane (for example, a second direction and a third direction Y) intersecting the first direction X , ≪ / RTI > Z). ≪ / RTI >

However, the technical idea of the present invention is not limited thereto, and the first elastic arm 114 and the second elastic arm 116 may not be symmetrical to each other. For example, depending on the shape of the electric card assembly 20 inserted into or discharged from the card connector 10 in the direction opposite to the first direction X or the first direction X, the first elastic arm 114, And the second resilient arms 116 may have different shapes. Also, for example, the first resilient arm 114 may be disposed closer to the plane passing through the contact portion 112 than the second resilient arm 116 and intersecting the first direction X. [

The contact of the card connector in electrical contact with the electric card is liable to be deformed or broken by the electric card inserted into the card connector. For example, an inserted electrical card may contact a contact by applying a contact pressure by pushing down the contact. At this time, the electric card may apply an excessive contact pressure to the contact, and the contact may be deformed or broken. This problem can be further exacerbated in a miniaturized electric card such as a nano SIM card.

Accordingly, the card connector according to some embodiments of the technical idea of the present invention may include an elastic arm including an opening to prevent buckling or breakage of the contact. Specifically, the first and second openings O1 and O2 formed in the first and second elastic arms 114 and 116 can disperse the contact pressure applied to the contact 110. [ The card 400 may apply a contact pressure to the contact portion 112 in direct contact with the contact portion 112 in a direction opposite to the third direction Z. This contact pressure is dispersed around the first and second openings O1 and O2 . As a result, the contact pressure is evenly distributed to the first and second elastic arms 114 and 116, so that deformation or breakage of the contact 110 can be prevented.

Hereinafter, with reference to Fig. 8, a contact according to some embodiments of the technical idea of the present invention will be described. For convenience of explanation, the parts overlapping with those described with reference to Figs. 1 to 7 will be briefly explained or omitted.

Figure 8 is a perspective view of a contact according to some embodiments of the inventive concepts.

Referring to FIG. 8, the contact 110 'includes a first resilient arm 114' and a second resilient arm 116 '. Compared to the contact 110 according to FIG. 5, the contact 110 'is substantially the same except that the first and second openings O1', O2 'extend to the base 200.

As the first opening O1 'in the first resilient arm 114' extends to the base 200, the first resilient arm 114 'includes a first sub-elastic arm 1141 spaced apart from the first sub- 2 sub-elastic arms 1142. The sub- That is, the first and second sub-elastic arms 1142 may be a portion of the first elastic arm 114 'that is spaced apart from each other by the first opening 01'. Specifically, the first sub-elastic arm 1141 may extend from the base 200 in the second direction Y. [ The second sub elastic arm 1142 may be spaced apart from the first sub elastic arm 1141 in the first direction X and may extend from the base 200 in the second direction Y. [

Likewise, the second resilient arm 116 'may include a third sub-elastic arm 1161 and a fourth sub-elastic arm 1162. Specifically, the third sub-elastic arm 1161 may extend from the base 200 in the second direction Y. [ The fourth sub elastic arm 1162 may be spaced apart from the base 200 in the second direction Y by a distance from the third sub elastic arm 1161 in the first direction X. [

In FIG. 8, the first and second elastic arms 114 'and 116' are each shown to include two sub elastic arms, but the technical idea of the present invention is not limited thereto. For example, the first and second elastic arms 114 ', 116' may each include three or more sub elastic arms.

In addition, as shown in FIG. 8, the first sub-elastic arm 1141 may be formed thicker than the second sub-elastic arm 1142. Specifically, the width of the first sub elastic arm 1141 in the second direction Y may be greater than the width of the second sub elastic arm 1142 in the second direction Y. [ Likewise, the fourth sub-elastic arm 1162 may be formed thicker than the third sub-elastic arm 1161. However, the technical idea of the present invention is not limited thereto, and the widths of the first to fourth sub elastic arms 1141, 1142, 1161, and 1162 may vary.

In some embodiments, the first resilient arm 114 'and the second resilient arm 116' may have a symmetrical shape. For example, the first resilient arm 114 'and the second resilient arm 116' may pass through the contact portion 112 and extend in a plane intersecting the first direction X (e.g., in the second and third directions (Y, Z)), as shown in Fig.

Accordingly, the first sub-elastic arm 1141 may be symmetrical with the fourth sub-elastic arm 1162, and the second sub-elastic arm 1142 may be symmetrical with the third sub-elastic arm 1161. However, the technical idea of the present invention is not limited thereto, and the first elastic arm 114 'and the second elastic arm 116' may not be symmetrical to each other.

In some embodiments, the second resilient arm 116 'may not include the second opening O2'. Accordingly, the second elastic arm 116 'may not include the third and fourth sub elastic arms 1161 and 1162. In such a case, in some embodiments, the first sub-elastic arm 1141, the second sub-elastic arm 1142, and the second elastic arm 116 'may be disposed at equal intervals from each other. For example, the first sub-elastic arm 1141 and the second resilient arm 116 'may be symmetrical with respect to a plane that intersects the first direction X, and the second sub- Can be arranged on a plane.

In the process of inserting or ejecting the electric card, the contact of the card connector in electrical contact with the electric card is liable to buckle or break. For example, there may be a step between the electrical card and the card connector receiving the electrical card. Such a step may buckle or break the contact of the card connector in electrical contact with the electrical card during insertion or ejection of the electrical card. This problem can be further exacerbated in a miniaturized electric card such as a nano SIM card.

Accordingly, the card connector according to some embodiments of the technical idea of the present invention may include an elastic arm including a plurality of sub-elastic arms to prevent buckling or breakage of the contact. For example, when the electric card assembly 20 is inserted into the card connector 10 along the first direction X, the electric card assembly 20 may first come into contact with the first sub-elastic arm 1141 . At this time, the second sub elastic arm 1142 supports the first sub elastic arm 1141 to prevent buckling or breakage of the first elastic arm 114 'by the electric card assembly 20. Likewise, when the electric card assembly 20 is ejected from the card connector 10, the electric card assembly 20 may first be separated from the fourth sub-elastic arm 1162. At this time, the third sub-elastic arm 1161 supports the fourth sub-elastic arm 1162 to prevent buckling or breakage of the second elastic arm 116 '.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10: card connector 20: electric card assembly
100: metal structure 110: contact
120: mounting part 130: connection part
200: Base 300: Shield case
400: Electric card 500: Card tray

Claims (13)

A card connector for accommodating a card inserted along a first direction,
A plurality of contacts in electrical contact with the card; And
And a base for fixing each of the contacts,
Each said contact comprising:
A contact disposed directly above the base,
A first elastic arm connecting the contact portion to the base and including a first opening;
And a second elastic arm spaced apart from the first elastic arm in the first direction to connect the contact portion to the base and including a second opening,
The first elastic arm includes a first support portion extending from the base in a second direction intersecting with the first direction, a first guide portion bent from one end of the first support portion and connecting the first support portion to the contact portion, ≪ / RTI >
The second elastic arm includes a second support portion extending from the base in the second direction and a second guide portion bent from one end of the second support portion and connecting the second support portion to the contact portion,
Wherein the first opening portion is bent and extends across the first support portion and the first guide portion,
And the second opening portion is bent and extends across the second support portion and the second guide portion. delete delete The method according to claim 1,
Wherein an upper surface of the first support portion and an upper surface of the first guide portion form an angle larger than 90 degrees and smaller than 180 degrees. The method according to claim 1,
And the second direction is perpendicular to the first direction. The method according to claim 1,
Wherein the first and second elastic arms have a shape that is symmetrical with respect to a plane passing through the contact portion and intersecting with the first direction. The method according to claim 1,
And the first and second openings extend to the base, respectively. The method according to claim 1,
Wherein both edges of the contact portion in the first direction each have a shape bent downward. A card connector for accommodating a card inserted along a first direction,
A plurality of contacts in electrical contact with the card; And
And a base for fixing each of the contacts,
Each said contact comprising:
A contact disposed directly above the base,
A first elastic arm connecting the contact portion to the base,
And a second elastic arm spaced apart from the first elastic arm in the first direction and connecting the contact portion to the base,
The first elastic arm may include a first sub elastic arm extending from the base in a second direction intersecting the first direction and being bent and connected to the contact portion, and a second sub elastic arm extending in the second direction from the base, A second sub-elastic arm connected to the contact, and a first opening between the first sub-elastic arm and the second sub-
Wherein the first sub elastic arm, the second sub elastic arm, and the first opening are arranged in order along the first direction. 10. The method of claim 9,
The second elastic arm includes a third sub elastic arm extending in the second direction from the base and bent and connected to the contact portion, and a third sub elastic arm extending from the base in the second direction, A second sub-elastic arm, and a second opening between the third sub-elastic arm and the fourth sub-
And the third sub elastic arm, the fourth sub elastic arm, and the second opening are arranged in order along the first direction. 11. The method of claim 10,
Wherein the first and second elastic arms have a shape symmetrical with respect to a plane passing through the contact portion and extending in the second direction. 10. The method of claim 9,
Wherein a width of the first sub elastic arm in the first direction is larger than a width of the second sub elastic arm in the first direction. 10. The method of claim 9,
Wherein both edges of the contact portion in the first direction each have a shape bent downward.

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