CN101997197B - Connector - Google Patents

Abstract

The present invention provides a connector, capable of improving locating precision of a conductor relative to a connection position of the connector, and improving reliability of electric connection. A contact (3) connects a support part (31) and a spring part (32) arranged oppositely in a direction of inserting the conductor to form a continuous body by a connection part (33), the support part is abutted to an inner face of a connector main body (2), and one end part of a conductor insertion port (21) of the spring part is held in the connector main body in a freely moving manner. The support part and the spring part have claws (35a, 32a) for holding the conductor (100). The support part is provided with a locating projection (37) abutted to a front end part of the conductor and arranged in a front position relative to the claws in the direction of inserting the conductor. When an operation element (5) is rotated to an anti-falling-off position, a cam part (51) pushes a front position of the spring part relative to the locating projection in the direction of inserting the conductor so as to make the spring part to elastically deform, such that the claw (32a) is contacted with the conductor elastically.

Description

Connector

technical field

The present invention relates to a connector for connecting wires such as flexible printed circuit boards (Flexible Printed Circuits).

Background technique

Conventionally, there is a connector described in Patent Document 1 as a connector for holding a wire such as an FPC. This connector has the connector main body 60 of inserting wire 100 as shown in Fig. 7 (a), (b), a plurality of contacts 70 that are respectively held on the connector main body 60, and is held in connection with freedom of rotation. On the main body 60 of the device, the operation member 80 is used to make the plurality of contacts 70 contact or separate from the wire 100 according to the rotation operation.

The connector main body 60 is open at both ends in the left-right direction of FIG.

Each contact 70 is a part pressed into and fixed in the connector main body 60 from the opening on the right side of the connector main body 60. The connecting portion 73 between the portion 71 and the right side of the spring portion 72 is formed in a U-shape. The spring part 72 is supported on the connection part 73 by a cantilever. The left end of the spring part 72 is free to move up and down inside the connector body 60 . The support portion 71 is arranged along the upper surface of the bottom wall of the connector main body 60 , and a receiving portion 75 is provided at a position opposite to the contact portion 74 at the left end portion of the support portion 71 . In addition, the plurality of contacts 70 are held side by side on the connector main body 60 in a direction perpendicular to the drawing surface of FIG. 7( a ).

The operation member 80 is pivotally supported by the connector body 60 to be rotatable with respect to the connector body 60 , and at a portion of the spring portion 72 that faces the contact portion 76 provided between the contact portion 74 and the connection portion 73 , A cam portion 81 is provided.

As shown in FIG. 7( a), when the operating member 80 is rotated to the position where the operating member 80 is upright, compared with when the operating member 80 is rotated to a position substantially parallel to the horizontal direction, since the lower end position of the cam portion 81 is upward As the spring portion 72 moves, the spring portion 72 elastically deforms in a direction away from the support portion 71 , and thus the contact portion 74 is displaced to a position away from the lead wire 100 .

And, when the lead wire 100 is inserted into the inside of the connector main body 60 from the lead wire insertion opening 61 in the state where the contact part 74 of the contact 70 is displaced to a position away from the lead wire 100, since the front end of the lead wire 100 is connected to the The positioning portion 62 provided in the device main body 60 abuts against, thereby determining the insertion position of the lead wire 100 . Next, when the operating member 80 is rotated to a position approximately parallel to the horizontal direction with the lead wire 100 inserted, the contact portion 76 is pressed toward the support portion 71 by the cam portion 81, and the spring portion 72 is pushed toward the support portion 71. Elastic deformation on one side. At this time, the wire 100 is clamped between the contact portion 74 and the receiving portion 75 provided at the top end of the spring portion 72, and the contact portion 74 is electrically connected to the conductor pattern (not shown) provided on the surface of the wire 100 .

[Patent Document 1] Japanese Patent No. 4283777

In the connector of the above-mentioned prior art, when the wire 100 is inserted into the inside of the connector body 60, the front end of the wire 100 abuts against the positioning portion 62 of the connector body 60, so that the front end of the wire 100 is determined relative to the connection. The position of the connector body 60, but because the contact 70 is pressed and fixed in the connector body 60, if the precision of the contact 70 assembled in the connector body 60 is low, there will be a position deviation where the contact 70 contacts the wire 100 Big question like this.

With the miniaturization of electronic equipment in recent years, it is desired that the connector is also miniaturized, and the position of the contact portion 74 between adjacent contacts 70 has been staggered towards the direction of wire insertion (the left-right direction in FIG. 7 ), A connector that narrows the distance between adjacent contacts 70 . Fig. 6 is the top view of the wire 100 connected on this connector, on one surface of the wire 100, a plurality of conductor patterns 101 are arranged side by side in parallel along the width direction, but in order to make the electrical connection stable, the conductor pattern 101 and the connection The part where the device contacts is formed wider than the other parts, and the positions of the wide parts 102 in the wire insertion direction are staggered and arranged in a staggered manner, not only can the width of the wire 100 be reduced, but also the number of poles can be increased. On the other hand, when the position of the contact portion 74 between the adjacent contacts 70 of the connector is staggered along the wire insertion direction, it is necessary to accurately align the contact portion 74 of each contact 70 with the conductor pattern 101. The relative position of the wide part 102 is aligned, but if the relative position accuracy of the contact 70 and the connector main body 60 is poor, the contact state between the wide part 102 of the conductor pattern 101 and the contact part 74 becomes unstable, and there is an electrical connection. The problem of reduced reliability. In particular, because the length dimension of the front wide portion 102 in the wire insertion direction is shorter than that of the rear wide portion 102, the contacts 70 contacting the front wide portion 102 in the wire insertion direction require higher positional accuracy.

Contents of the invention

The present invention is in view of the above problems, and its purpose is to provide a connector that improves the positioning accuracy of the wire relative to the connection position of the connector and improves the reliability of the electrical connection.

In order to achieve the above object, the present invention is a connector, comprising: a connector main body, through a wire insertion opening opened on the surface, a wire is inserted into or pulled out from a contact receiving space provided inside; The insertion direction is oppositely disposed inside the contact accommodating space, the supporting part and the spring part clamping the wire inserted between the two, and the connecting part connecting the supporting part and the spring part into a continuous whole, the contact makes the supporting part The inner surface of the connector body is in contact with the inner surface of the connector body, and the end portion of the spring portion on the side of the wire insertion port is held in the connector body to move freely, so that at least one of the spring portion or the support portion is electrically connected to the conductor portion of the wire. connection; and the operating member, which can be freely rotatably arranged on the connector body between the anti-off position where the wire inserted into the contact receiving space is relatively difficult to pull out and the non-off-proof position where it is relatively easy to pull out; The supporting part and the spring part of each contact are respectively provided with a clamping part which clamps the wire which is inserted between the supporting part and the spring part; The positioning part abuts against the front end of the wire at the position near the front of the holding part; a plurality of cam parts are provided on the operating part, and the plurality of cam parts and the spring part are close to the positioning part in the direction of wire insertion. The front part is arranged correspondingly, and when it is rotated to the anti-off position, the spring part is pressed to make the spring part elastically deform, so that the clamping part of the spring part is in elastic contact with the wire.

The effect of the invention

According to the present invention, when the wire is inserted from the wire insertion port, by making the front end of the wire abut against the positioning portion provided on the support portion of the contact, since the relative position of the wire to the contact can be accurately determined, it is possible to The deviation of the position where the clamping portion of the support portion and the spring portion contacts the wire is reduced, and the reliability of the electrical connection can be improved.

Description of drawings

Fig. 1 is the figure that shows the connector of this embodiment, (a) is the figure of section A-A of Fig. 3; (b) is the figure of section C-C of Fig. 4;

Fig. 2 is the figure that shows the connector of this embodiment, (a) is the figure of section B-B of Fig. 3; (b) is the figure of section D-D of Fig. 4;

3 is a diagram showing the connector of this embodiment, (a) to (c) are three views of the state in which the operating member is rotated to the non-off-prevention position;

4 is a diagram showing the connector of this embodiment, (a) to (c) are three views of the state in which the operating member is rotated to the anti-off position;

5 is a view showing the connector of this embodiment, (a) is a perspective view of the appearance of the state in which the operating member is rotated to the non-off-preventing position; (b) is a perspective view of the appearance of the state in which the operating member is rotated to the anti-off position picture;

Figure 6 is a top view of the wires connected to the connector of the present embodiment;

7 is a view showing a prior art connector, (a) is a cross-sectional view of a state in which the operating member is rotated to a non-disengagement prevention position; (b) is a cross-sectional view of a state in which the operation member is rotated to a disengagement prevention position.

Explanation of reference signs

1. Connector; 2. Connector body; 3, 4. Contacts; 5. Operating parts; 20. Contact storage space; 21. Wire insertion port; 32a, 35a, 41a, 42a. Claw (clamping part); 33, 43. Connecting part; 35. Elastic piece; 36, 46. Recessed part; 37. Positioning protrusion (positioning part); 51, 52. Cam Department; 100. Wire; 101. Conductor pattern (conductor part);

Detailed ways

Referring to Figs. 1 to 6, an embodiment in which the technical idea of the present invention is applied to a connector for connecting wires such as flexible printed circuit boards (Flexible Printed Circuits) will be described below. In the following description, unless otherwise specified, the directions shown in FIG. 3( a ) define the up, down, left, and right directions, and the left and right directions in FIG. 3( c ) will be described as the front and rear directions. Wherein, the left side of Fig. 3(c) is regarded as the front side of the wire insertion direction.

The connector 1 of this embodiment is a 7-electrode connector, and includes a connector main body 2, two types of contacts 3 and 4, and an operation member 5 as main components. In addition, the number of poles of the connector 1 is not limited to the above-mentioned number of poles, and a connector having the number of poles corresponding to the specification can be manufactured.

The connector main body 2 is made of, for example, an insulating synthetic resin molded product or other suitable materials, and a wire connecting the internal contact receiving space 20 with the outside is opened on one surface in the front-rear direction (wire insertion direction). The opening 21 is inserted into the opening 21, and an opening 22 extending from the other side in the front-rear direction to a part of the upper wall is provided. Furthermore, the contact housing space 20 is partitioned into a plurality of housing chambers by partition walls 23 provided at predetermined intervals in the left-right direction, and any one of the contacts 3 and 4 is housed in each housing chamber.

The two types of contacts 3 and 4 are formed of a metal material having good elasticity and conductivity such as copper-beryllium alloy, and are arranged in a staggered manner along the left-right direction of the connector body 2 . Among them, one contact 3 is arranged at the odd-numbered positions (1, 3, 5, 7) from one end of the connector body 2 in the left-right direction, and the other contact 4 is arranged at one end of the connector body 2 in the left-right direction. Start at the even-numbered (2, 4, 6) positions.

As shown in Fig. 1 (a), (b), the contact 3 of odd-numbered lead wire has the lead wire 100 that is oppositely arranged in the inside of the contact accommodating space 20 along the lead wire insertion direction (front-rear direction), sandwiching and inserting between the two. The support part 31 and the spring part 32, and the connection part 33 which connects the support part 31 and the front end side of the spring part 32 in the wire insertion direction as a continuous integral body. The contact 3 is formed in a U-shape by the supporting portion 31 , the spring portion 32 and the connecting portion 33 , and is inserted into each receiving chamber from the lead wire insertion port 21 with the connecting portion 33 serving as a head.

The support portion 31 of the contact 3 is arranged in the contact accommodating space 20 in a state where the lower side edge is in contact with the inner surface (the upper surface of the lower wall) of the connector body 2 . The end portion of the support portion 31 on the side of the wire insertion port 21 is provided with a notch portion 2a extending downward from the lower wall of the connector body 2 and soldered to a conductor pattern provided on the mounting substrate not shown in the figure. The terminal strip 34. And, from the middle part of the support part 31, there is provided an elastic contact piece 35 protruding toward the wire insertion port 21 side, and the top end portion is opposite to the top end portion of the spring portion 32. On the top end portion of the elastic contact piece 35, a The claw 35a faces the spring part 32 side. And, on the partition wall 23, a guide groove 24 is formed on the upper and lower sides of the lead wire 100 that is opened toward the lead wire insertion port 21 side along the lead wire insertion direction, and guides the lead wire 100 inserted from the lead wire insertion port 21. Positioning protrusions 37 that abut against the front end of the lead wire 100 as a positioning portion protrude from the position near the lead wire insertion port 21 .

A recessed portion 36 is provided at a portion of the spring portion 32 of the contact 3 exposed from the opening 22 , and a cam portion 51 of the operation member 5 described later is inserted into the recessed portion 36 . And, on the top end portion of the spring portion 32 that is free to move in the vertical direction near the wire insertion port 21 and opposite the claw 35a at the top end of the spring piece 35, a claw 32a protrudes toward the spring piece 35 side. Here, the claw 35a on the side of the support portion 31 and the claw 32a on the side of the spring portion 32 constitute a clamping portion for clamping the lead wire 100 inserted between the support portion 31 and the spring portion 32 .

And the contact 4 of even-numbered lead wire is shown in Fig. 2 (a), (b), has the supporting part 41 and the spring part 42 that are relatively arranged in contact accommodating space 20 inside along wire insertion direction (front-rear direction), and will support The middle part of the wire insertion direction of the part 41 and the spring part 42 (the front side of the front end position of the guide groove 24 in the wire insertion direction) is connected to form a continuous integral connection part 43 . The contacts 4 are formed in an H-shape with a support portion 41 , a spring portion 42 and a connection portion 43 , and are inserted into each accommodation chamber from the side of the opening 22 .

The support portion 41 of the contact 4 is placed in the contact accommodating space 20 in a state where the lower side edge is in contact with the inner surface (the upper surface of the lower wall) of the connector body 2 . At the end of the opening 22 side of the support portion 41, a conductor pattern extending downward from the cutout 2b provided on the lower wall of the connector main body 2 and soldered to the mounting substrate (not shown in the figure) is provided. on the terminal strip 44. In addition, a claw 41 a protrudes toward the spring portion 42 on the leading end portion of the support portion 41 on the lead wire insertion port 21 side.

On the spring part 42 of the contact 4, a claw 42a facing the support part 41 side protrudes from the top end part of the wire insertion port 21 side, and the claw 41a on the support part 41 side and the claw on the spring part 42 side 42 a constitutes a clamping portion for clamping the lead wire 100 inserted between the support portion 41 and the spring portion 42 . Also, on the lower surface of the spring portion 42 on the opposite side to the lead wire insertion opening 21 than the portion supported by the connection portion 43, a semicircular recess 46 is formed in which a cam portion 52 of the operation member 5 described later is fitted.

The operating member 5 is formed into a long plate shape that is slender in the left-right direction with an insulating synthetic resin, and the cam parts 51, 52 that can be provided at one end in the width direction (up-down direction in Fig. 4 (b)) can be used as the center of rotation. The wire 100 is held on the connector main body 2 in a freely rotatable manner between the anti-off position where it is relatively difficult to pull out and the non-off-proof position where the wire 100 is relatively easy to pull out.

The cam portion 51 is provided corresponding to the recessed portion 36 of the contact 3 and has a rectangular cross-sectional shape. The distance from the lower wall of the connector main body 2 to the lower end position of the cam portion 51 changes with the rotation operation of the operating member 5, as shown in FIG. The distance from the lower wall of the connector main body 2 to the lower end of the cam portion 51 is the smallest. As shown in FIG. The distance to the lower end position of the cam portion 51 is the largest.

In addition, the cam portion 52 is formed into a cylindrical shape of about three-quarters of the circumference, and the axial direction of the cylindrical portion is arranged side by side in the left-right direction, and the peripheral surface of the cylindrical portion is in contact with the recessed portion 46 of the contact 4. configuration. Among them, an engaging hole 53 for engaging the end portion of the spring portion 42 on the concave portion 46 side is formed adjacent to the cam portion 52 in the operating member 5 . The distance from the lower wall of the connector main body 2 to the position of the upper end of the cam portion 52 changes corresponding to the turning operation of the operating member 5, as shown in FIG. , the distance from the lower wall of the connector body 2 to the upper end of the cam portion 52 is the largest; as shown in Figure 2(a), in the state where the operating member 5 is erected (non-off-proof position), the distance from the connector body 2 The distance from the lower wall to the upper end position of the cam portion 52 is the minimum.

Next, the operation of inserting and removing the lead wire 100 in the connector 1 of this embodiment will be described. As shown in Fig. 1(a), Fig. 2(a) and Fig. 3, before connecting the lead wire 100, it is in the position where the operation member 5 is upright (the position approximately perpendicular to the supporting parts 31, 41 of the contacts 3, 4) , in this state, since the cam portion 51 does not push down the recessed portion 36 of the contact 3 as shown in FIG. The direction (upper side) of the claw 35a of the tab 35 is displaced. And as shown in Fig. 2 (a), in this state, since the cam portion 52 does not push the concave portion 46 of the contact 4 upward, the spring portion 42 does not elastically deform, and the claw 42a of the spring portion 42 moves away from the support. The direction (upper side) of the claw 41a of the portion 41 is displaced. Therefore, in the state where the operating member 5 is rotated to the non-off-prevention position shown in FIGS. Therefore, the resistance when the lead wire 100 is inserted into the connector 1 for connection can be reduced, and even a flexible lead wire 100 such as FPC can be easily inserted into the connector 1 for connection. In addition, in the state where the operating member 5 is rotated to the non-off-preventing position, the claws 32a, 42a of the contacts 3, 4 may also be arranged at positions in contact with the wire 100, and at this time, the electrical connection is established while the wire 100 is inserted. However, compared with when the operating member 5 is in the anti-off position, the holding force of the contacts 3 and 4 to hold the wire 100 is in a relatively small state, so the wire 100 is in a state that is relatively easy to pull out.

In the state where the operating member 5 is rotated to the non-off-proof position, if the wire 100 is inserted into the inside of the connector main body 2 from the wire insertion port 21, the wire 100 is guided by the guide groove 24 provided on the partition wall 23 on the upper and lower sides. It is inserted between the supporting parts 31 , 41 and the spring parts 32 , 42 of the contacts 3 , 4 . As shown in Figure 1 (b), when the wire 100 was further inserted into the inside of the connector body 2, the front end of the wire 100 abutted against the positioning projection 37 of the contact 3, so that it was determined that the front end of the wire 100 was relatively The position of contacts 3 and 4.

In the state where the wire 100 is inserted into the inside of the connector main body 2, if the operating member 5 is rotated to the support portion 31 of the contacts 3 and 4 as shown in Fig. 1(b), Fig. 2(b) and Fig. 4 , 41 approximately parallel to the position, as shown in FIG. One side (lower side) of the piece 35 is displaced, and the claw 32a of the spring portion 32 elastically contacts the conductor pattern 101 (conductor portion) provided on the upper surface of the wire 100 . And at this time, as shown in FIG. 2( b), the cam portion 52 pushes upward the recessed portion 46 of the contact 4 to elastically deform the spring portion 42, so that the pawl 42a of the spring portion 42 takes the connecting portion 43 as a fulcrum toward the supporting portion. 41 is displaced, and the claw 42a of the spring part 42 comes into elastic contact with the conductor pattern 101 provided on the upper surface of the wire 100 . Therefore, in the state where the operating member 5 is rotated to the anti-off position shown in FIG. 1( b), FIG. 2( b) and FIG. Therefore, the wire 100 is held by the crimping of the contacts 3, 4, and the wire 100 is relatively difficult to pull out. And, by clamping the lead wire 100 between the claw 32a of the spring part 32 and the claw 35a of the spring piece 35, and clamping the lead wire 100 between the claw 42a of the spring part 42 and the claw 41a of the supporting part 41, the The contacts 3, 4 and the conductor pattern 101 of the wire 100 are electrically connected.

On the other hand, in the state where the wire 100 is connected to the connector 1, if the operating member 5 is rotated from the anti-off position to the non-off position, the cams 51, 52 press the recesses 36, 36, 4 of the contacts 3, 4. The force of 46 disappears, and the claws 32a, 42a of the spring parts 32, 42 are displaced upward by the elastic restoring force of the spring parts 32, 42, away from the wire 100, so the force of the contacts 3, 4 to hold the wire 100 disappears, and it can be easily The wire 100 is pulled out.

The connector 1 of the present embodiment adopts the above-mentioned structure, and when the lead wire 100 is inserted from the lead wire insertion port 21, the front end portion of the lead wire 100 abuts against the positioning projection (positioning portion) 37 provided on the supporting portion 31 of the contact 3. By accurately determining the position of the wire 100 relative to the contacts 3, 4 in this way, it is possible to reduce the deviation of the clamping portion of the supporting portion 31, 41 and the spring portion 32, 42 and the contact position of the wire 100, and the contact 3, 4 is in contact with the wire 100. The predetermined position is in electrical contact with the wire 100, which can improve the reliability of the electrical connection.

In addition, in this embodiment, since the cam portions 51, 52 of the operation member 5 are respectively provided corresponding to the spring portions 32, 42 of the multi-pole contacts 3, 4, the spring portions 32 of the contacts 3 of odd-numbered leads are pushed upward. Since the spring portion 42 of the contact 4 of the even-numbered lead wire presses the cam portion 51 downward, the cam portion 51 can be rotated freely even without providing a bearing structure for pivotally supporting the operation member 5 on the connector body 2 . The operating member 5 is pivotally supported on the contacts 3 , 4 held on the connector body 2 .

Although the positioning protrusion 37 for positioning the wire 100 is provided in the middle of the support portion 31 of each contact 3 in the above-mentioned embodiment, it is preferable to place the operating member 5 in the state of inserting the wire 100 on the support portion 31. When falling from the non-off-proof position to the anti-off position, the position that will not apply force due to the elastic deformation of the contact 3 is provided with a positioning protrusion 37, which can suppress the force applied to the wire 100 from the positioning protrusion 37 and make the wire 100 move. The position is shifted. In addition, if the contact pressure between the contact 3 and the wire 100 above a predetermined value can be obtained, since the positional deviation of the wire 100 can be suppressed by the contact pressure, within the range where the positioning accuracy of the wire 100 satisfies a predetermined performance requirement, by The elastic deformation of the contact 3 may apply force to the portion where the positioning protrusion 37 is provided.

And, although only positioning projection 37 is provided with on contact 3 in the present embodiment, because as shown in Fig. The wide part 102 where the contact 3 contacts is longer than the length dimension in the wire insertion direction, so even if the assembly position of the contact 3 and the contact 4 is slightly deviated in the wire insertion direction, the contact 4 can be firmly connected to the conductor. Broad portion 102 of pattern 101 is in contact. In addition, when the operating member 5 is turned from the non-off-preventing position to the anti-off position under the state of inserting the lead 100, if there is no active force applied by the elastic deformation of the contact 4, then the lead 100 can be arranged on the contact 4 side. The positioning part that abuts against the front end of the

In addition, the structures of the contacts 3 of odd-numbered leads and the contacts 4 of even-numbered leads may be exchanged.

In addition, although the conductor pattern 101 provided on the upper surface of the wire 100 is in electrical contact with the clamping portion (claw 32a, 42a) provided on the spring portion 32, 42 in this embodiment, it may also be provided on the support portion 31, 41 side. The clamping portion (the claw 35 a of the elastic piece 35 and the claw 41 a of the supporting portion 41 ) is in electrical contact with the conductor pattern provided on the lower surface of the wire 100 .

Although the above has been described centering on specific embodiments of the present invention, various modifications, changes, or corrections can be made within the scope of the gist of the present invention and the appended claims in the technical field, so the above description and drawings are not intended to The technical idea that defines the present invention should only be construed as an example of the present invention.

Claims (2)

1. A connector, characterized in that it has: a connector main body, through a wire insertion opening provided on the surface, a wire is inserted or pulled out in a contact receiving space provided inside; A plurality of contacts, having a supporting part and a spring part arranged oppositely in the contact receiving space along the wire insertion direction, clamping the wire inserted between the two, and connecting the supporting part and the spring part into a continuous whole part, the contact makes the lower edge of the support part abut against the upper surface of the lower wall of the connector body, and the end part of the spring part on the wire insertion port side is held in the connector body freely, so that At least one of the spring portion or the support portion is electrically connected to the conductor portion of the wire; and The operating member is arranged on the connector body so as to be freely rotatable between a disengagement-preventing position where it is relatively difficult to pull out the wire inserted into the contact accommodating space, and a non-disconnection-prevention position where it is relatively easy to pull out; The supporting part and the spring part of each contact are respectively provided with the clamping part which clamps the wire which is inserted between the supporting part and the spring part; The positioning part abutting against the front end of the wire at the position near the front of the clamping part; A plurality of cam portions are provided on the operating member, and the plurality of cam portions are arranged corresponding to the position of the spring portion on the front side relative to the positioning portion in the wire insertion direction, and push the spring portion when it is rotated to the anti-off position Then, the spring portion is elastically deformed, so that the holding portion of the spring portion elastically contacts the conductor. 2. The connector according to claim 1, characterized in that, the plurality of cam portions corresponding to the plurality of spring portions of the operating member are staggered toward The plurality of spring parts are pushed down and up to elastically deform the spring parts.

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