JP5141973B2 - Lead frame - Google Patents

Description

  The present invention relates to a lead frame, and more particularly to a lead frame having a work support portion that supports a work as a part constituting an electronic part.

  Conventionally, a plate-shaped lead frame that has a frame that constitutes an outer frame and a work support portion that extends from the frame, defines a work placement area where the work can be placed, and can support the work is known. It has been.

Japanese Laid-Open Patent Publication No. 2002-373814 (Patent Document 1) describes a lead frame having such a configuration. The lead frame described in the publication is provided with a support piece that extends from the frame and supports a core that is a workpiece, and the support piece is provided with a telescopic portion. The extended end of the support piece comes into contact with the axial end of the core supported by the work support portion, so that the core can be positioned with respect to the lead frame, and the core can be prevented from being displaced relative to the lead frame. It is configured to be able to.
JP 2002-373814 A

  However, in the conventional technique described in the above publication, when the expansion / contraction part contracts by the maximum contraction amount that can be contracted, the expansion / contraction part may be excessively deformed and the elasticity may be lost. Therefore, the amount that can be actually expanded and contracted to such an extent that the stretchability of the expandable portion is not lost is limited to the thickness of the plate-like lead frame.

  Accordingly, an object of the present invention is to provide a lead frame having an expansion / contraction part that does not lose its elasticity even when the expansion / contraction part is contracted by the maximum contraction amount that can be contracted.

  In order to solve the above-described problems, the present invention provides a frame, a stretchable portion connected to the frame and supported in parallel with one virtual plane, and stretchable on the one virtual plane, and the stretchable portion A work support portion that is connected to and supported by the support member and is movable in the extension / contraction direction of the extension / contraction portion and is capable of supporting the workpiece. Is a lead frame disposed and connected on the one virtual plane, wherein the stretchable portion includes a bending portion, a first extension portion connected to one end of the bending portion, and the other end of the bending portion. A spring having at least one expansion / contraction basic portion connected to the first extension plane and having a second extension portion that is relatively close to and away from the first extension portion in the extension / contraction direction of the extension / contraction portion on the one virtual plane The shortest distance between one end of the bending portion and the other end of the bending portion is the first extension portion and the It provides a long lead frame than the shortest distance between the two extending portions.

  The expansion / contraction part is connected to the first extension part connected to one end of the bending part and the bending part and the other end of the bending part and relative to the first extension part in the extension / contraction direction of the extension part on one virtual plane. A spring having at least one expansion / contraction basic portion having a second extending portion that can be separated and approached, and the shortest distance between one end of the bending portion and the other end of the bending portion is the first extension portion and the second extension portion. Because it is longer than the shortest distance to the protruding part, the expansion and contraction part contracts when the first extension part and the second extension part of the extension part approach each other, and the expansion and contraction part contracts to the maximum. It can be set as the state which the 1st extension part and the 2nd extension part contact | abutted.

  For this reason, it is possible to prevent the expansion / contraction part from being further contracted by the contact between the first extension part and the second extension part, and the spring constituting the expansion / contraction part is excessively deformed and the elasticity is lost. Can be prevented. As a result, the stretchable part can be sufficiently contracted, and a state in which the stretchable part can be sufficiently stretched can be maintained.

  Here, it is preferable that the expansion / contraction part includes the three expansion / contraction basic parts that are connected to each other to form a wave shape. The stretchable part has three stretchable basic parts that are connected to each other to form a wave shape. Therefore, the stretchable part can be shrunk and stretched in a well-balanced manner, and the stretchable part can be easily shrunk and easily returned from the contracted state. be able to.

  In addition, it is preferable that the second extending portions of all the extendable basic portions can be relatively separated from and approaching the first extending portion at the same distance at the same time. Since the second extending portions of all the stretchable basic portions can be relatively separated from and approaching the first extending portion at the same distance at the same time, all the second extending portions are simultaneously connected to the first extending portion. When the stretched portion is contracted to the maximum when it is in contact, the second extending portion starts to approach relative to the first extending portion until the stretchable portion is contracted to the maximum, The spring force can be increased smoothly.

  Further, a part of the stretchable part near the part connected to the frame is opposed to a part of the frame near the part connected to the stretchable part through a gap. It is preferable to have a frame facing portion.

  A portion near the portion connected to the frame that is part of the stretchable portion has a frame facing portion that faces a portion near the portion that is part of the frame and connected to the stretchable portion via a gap. Therefore, the part which shrinks | contracts in an expansion-contraction part can be increased, and a spring force can be improved more.

  Moreover, it is preferable that this workpiece | work support part has a movement base part which can be latched to the movement jig which can move to the expansion-contraction direction of this expansion-contraction part, and was connected to this expansion-contraction part.

  The work support part can be locked to a movable jig that can move in the expansion / contraction direction of the expansion / contraction part, and has a movement base connected to the expansion / contraction part, so that the movement base is locked to the movement jig and the movement jig is moved. The work support part including the movement base can be easily moved in the direction in which the expansion / contraction part contracts from the movement base as a base point, and the direction in which the expansion / contraction part extends the work support part including the movement base from the movement base part Can be easily moved to.

  In addition, a pair of the work support portions are provided, one of the work support portions is disposed so as to face one end of the work, and the other work support portion is disposed so as to face the other end of the work. It is preferable that a pair of parts is provided, one of the stretchable parts is connected to the one work support part, and the other stretchable part is connected to the other work support part.

  A pair of work support parts are provided, one work support part is arranged to face one end of the work, the other work support part is arranged to face the other end of the work, and a pair of expansion / contraction parts are provided, Since the stretchable part is connected to one work support part and the other stretchable part is connected to the other work support part, the stretchable part is configured to be distributed on one end side and the other end side of the work. In addition, the workpiece can be positioned at the center of the lead frame in the direction connecting the one end and the other end of the workpiece.

  In addition, when the expansion / contraction part is provided only on one end side or the other end side of the workpiece, the extension / contraction part has a long dimension in the expansion / contraction direction of the expansion / contraction part in order to give the expansion / contraction part a desired maximum contraction amount. In other words, the other end with respect to one end of the stretchable part connected to the frame hangs down from a position on one virtual plane, but the size of the stretchable part is configured to be relatively short in the stretchable direction of the stretchable part. It is possible to prevent such drooping as much as possible.

  As described above, according to the present invention, it is possible to provide a lead frame having a stretchable portion that does not lose stretchability even when the stretchable portion shrinks by the maximum shrinkage amount.

  A lead frame according to an embodiment of the present invention will be described with reference to FIGS. The lead frame 1 is configured to have a shape shown in FIG. 1 by punching and bending a plate-like body made of a copper alloy, and includes a frame 10, an expansion / contraction part 20, and a work support part 30. ing. One surface of the plate-like body, that is, the surface that appears in FIG. 1, is plated with Sn, and the other surface, that is, the surface opposite to the surface that appears in FIG. Is exposed. As will be described later, a core that is a workpiece 2 is disposed on a lead frame 1, and a lead wire (not shown) is wound around the core, and a part of the lead frame 1 is a terminal electrode of a coil component (not shown) that includes the core and the lead wire. It becomes.

  In the following description, the left-right direction in FIG. 1 is the X-axis direction, the direction perpendicular to the X-axis direction, and the up-down direction in FIG. 1, that is, the longitudinal direction of the core described later is the Y-axis direction. A direction perpendicular to the Y-axis direction and the Y-axis direction will be described as the Z-axis direction. Also, a plane defined by the X axis and the Y axis is referred to as an XY plane, a plane defined by the X axis and the Z axis is referred to as an XZ plane, and a plane defined by the Y axis and the Z axis is referred to as a YZ plane. To do. The XY plane corresponds to one virtual plane. Further, in FIG. 1, for convenience of explanation, as will be described later, only three pairs of the telescopic part 20 and the work support part 30 provided in pairs at the top and bottom of FIG. Many pairs are provided.

  The frame 10 has a substantially plate-like planar shape parallel to the XY plane, and extends in the Y-axis direction with a pair of connecting portions 11 and 11 extending in the X-axis direction. Has a partition portion 12 connected to one of the pair of connecting portions 11 and 11 and the other. A frame through-hole 11a is formed in a part of the connecting part 11 to which a later-described expansion / contraction part 20 is connected. The frame through-hole 11a is located on the virtual extension line C (FIG. 1) of the axial center of the workpiece 2 arranged in the workpiece arrangement region 1a described later. The thickness of the plate-like body that is punched and bent into the lead frame 1, that is, the thickness of the plate-like body in the Z-axis direction is about 0.10 mm, and the lead frame in the longitudinal direction of the partition portion 12 of the frame 10 1, that is, the width of the lead frame 1 shown in FIG. 1 in the Y-axis direction is about 22.6 mm. The movable base 31, the arm 32, the workpiece end surface facing portion 33, and the workpiece lower support 34 that constitute the elastic member 20 and the workpiece support 30 described later are formed by punching and bending a plate-like body. Therefore, each of these thicknesses is about 0.10 mm, and each has a substantially plate shape.

  The stretchable portions 20 have a substantially plate-like planar shape parallel to the XY plane, and are provided in pairs at the top and bottom of the drawing as shown in FIG. The pair of expansion / contraction portions 20 has a line-symmetric shape centered on an imaginary line parallel to the X-axis direction that is the extending direction of the connection portion 11 at the center position between the connection portions 11 and 11 of the frame 10. Unless otherwise specified, only the upper stretchable portion 20 in FIG. 1 will be described, and the description of the lower stretchable portion 20 in FIG. 1 will be omitted.

  As shown in FIG. 1, the expansion / contraction part 20 is configured by a spring having a wave shape in a plan view, and one end of the expansion / contraction part 20 is a part of the connecting part 11 of the frame 10, and the center between the partition parts 12, 12 adjacent to each other. The stretchable part 20 is supported by being connected to the part, that is, the part on the virtual extension line C of the axis of the work 2 placed in the work placement region 1a described later, and can be stretched on the XY plane. The other end of the telescopic part 20 is connected to a moving base part 31 of a work support part 30 described later.

  More specifically, the stretchable part 20 has three stretchable basic parts 21. As shown in FIG. 2, each of the expansion and contraction basic portions 21 includes a curved portion 21 </ b> A that is curved in a substantially semicircular shape, and a first extension that is connected to one end of the curved portion 21 </ b> A and extends substantially linearly in the substantially X-axis direction. It has a protruding portion 21B and a second extending portion 21C that is connected to the other end of the bending portion 21A and extends substantially linearly in the X-axis direction. When paying attention to one expansion and contraction basic part 21-1, the other end 21C-1 with respect to one end of the second extension part 21C connected to the bending part 21A is the first extension part connected to the bending part 21A. The curved portion 21A, the first extending portion 21B, and the second so as to relatively move away from each other in the Y-axis direction as the expansion / contraction direction of the expansion / contraction portion 20 on the XY plane with respect to the other end 21B-1 with respect to one end of 21B. The extending part 21C can be deformed. In the initial state where no force is applied to the telescopic portion 20, as shown in FIG. 2, the shortest distance A between the one end of the bending portion 21A and the other end of the bending portion 21A is the other end of the first extending portion 21B. Longer than the shortest distance B between the second extending portion 21C and the other end.

  When the telescopic part 20 is contracted by moving the work support part 30 described later to the Y-axis direction minus side, which is the upper side in FIG. 2, the other ends of the second extending parts 21C of the three telescopic basic parts 21 are At the same time, it is configured to be relatively close to the other end of the first extending portion 21B on the XY plane by the same distance. Similarly, when the telescopic part 20 is extended by moving a work support part 30 (described later) to the Y axis direction plus side, which is the lower side in FIG. 1, the other ends of the second extension parts 21 </ b> C of the three basic expansion parts 21 are At the same time, it is configured to be relatively spaced from the other end of the first extension portion 21B by the same distance on the XY plane. The expansion / contraction part 20 contracts in the Y-axis direction when the other end of the second extension part 21C of the expansion / contraction basic part 21 approaches the other end of the first extension part 21B. The other end of the two extending portions 21C is configured to extend in the Y-axis direction by being separated from the other end of the first extending portion 21B. For this reason, when the other ends of all the second extending portions 21C are in contact with the other ends of the first extending portions 21B at the same time, the stretchable portion 20 is contracted to the maximum, and the second extending portions 21C. The spring force can be increased smoothly until the expansion / contraction part 20 is contracted to the maximum after starting to approach relatively to the first extension part 21B.

  When the other end of the second extension portion 21C of the extension / contraction basic portion 21 approaches and comes into contact with the other end of the first extension portion 21B, the extension / contraction portion 20 can no longer shrink and shrinks to the maximum. It becomes a state. In an initial state in which no force is applied to the stretchable portion 20, the length of the stretchable portion 20 in the Y-axis direction is about 2.21 mm, and the other end of the second extension portion 21C of the stretchable basic portion 21 is the first extension. The length of the expansion / contraction part 20 in the Y-axis direction when coming into contact with the other end of the protruding part 21B is about 0.35 mm. Therefore, since the expansion / contraction part 20 is provided in a pair at the top and bottom of FIG. 1, the distance between the work support part 30 described later in the upper part of FIG. 1 and the work support part 30 described later in the lower part of FIG. The two stretchable portions 20 can be separated to about 0.70 mm, which is twice the maximum shrinkage of 0.35 mm.

  Thus, the contact between the other end of the first extension part 21B and the other end of the second extension part 21C can prevent the extension part 20 from being further contracted, and the spring constituting the extension part 20 Can be prevented from being excessively deformed and losing its elasticity. As a result, the stretchable part 20 can be sufficiently contracted, and can maintain a state in which it can be sufficiently stretched.

  The part of the stretchable part 20 connected to the connecting part 11 of the frame 10 is the part of the second extending part 21C connected to one end of the curved part 21A closest to the frame 10 in the Y-axis direction. As shown in FIG. 1, the protruding portion 21 </ b> C forms a frame facing portion that faces the frame 10 with a gap 1 b interposed therebetween. For this reason, the part which shrinks in the expansion-contraction part 20 can be increased, and a spring force can be improved more.

  Further, since the stretchable portion 20 includes the three stretchable basic portions 21 that are connected to each other to form a wave shape as described above, the stretchable portion 20 can be contracted and stretched in a well-balanced manner. It is easy to return from a contracted state.

  Moreover, since the expansion / contraction part 20 has a planar shape parallel to the XY plane and is made of a spring that can expand and contract on the XY plane, the expansion / contraction part 20 can be configured without a portion protruding in a direction perpendicular to the XY plane. . For this reason, it is not necessary to consider that a part of a workpiece transfer machine (not shown) that holds and conveys the workpiece 2 abuts on the expansion and contraction portion 20 when the workpiece 2 is arranged on the workpiece support 30 as described later. The arrangement of 2 can be facilitated.

  In addition, the telescopic portion 20 is disposed so as to be stretchable on the virtual extension line C of the axis of the work 2, and the later-described moving base 31 is disposed so as to be movable on the virtual extension line C of the axis of the work 2. The expansion / contraction of the expansion / contraction part 20 and the movement of the work support part 30 including the movement base 31 described later can be performed on the virtual extension line C of the axis of the work 2, and the expansion / contraction and movement of these parts are blurred. Can be prevented.

  The lower end of the expansion / contraction part 20 in FIG. 2 which is the other end of the expansion / contraction part 20 is an upper part of FIG. 2 which is one end side of the movement base 31 of the work support part 30 which will be described later, and is disposed in the work placement region 1a which will be described later. The portion extending from the portion of the movement base 31 of the workpiece support 30 on the virtual extension line C of the axis of the workpiece 2 extends over the portion near the left end of the movement base 31 shown in FIG. Accordingly, as described above, one end of the expansion / contraction part 20 is arranged in the work placement area 1a in combination with being arranged on the virtual extension line C of the axis of the work 2 arranged in the work placement area 1a described later. On the virtual extension line C of the axis of the work 2, the stretchable part 20 can be stretched and the work support part 30 is supported by the stretchable part 20. A later-described moving base 31 of the work support part 30 is movable in the direction of expansion / contraction of the expansion / contraction part 20 on the virtual extension line C of the axis of the work 2.

  The work support unit 30 includes a moving base 31, a pair of arm parts 32, 32, a work end surface facing part 33, and a work lower support part 34. The moving base 31 has a plate shape parallel to the XY plane and extends in the longitudinal direction in the X-axis direction. A jig engaging hole 31a that is a through hole is formed at the central position of the moving base 31 in the X-axis direction. Has been.

  With this configuration, the moving base 31 is moved in the Y-axis direction by inserting a moving base insertion pin 121 of the moving base moving unit 120 described later into the jig engaging hole 31a of the moving base 31 and moving the moving base moving unit 120 in the Y-axis direction. The workpiece support portion 30 including the moving base portion 31 can be easily moved in the Y-axis direction, which is the direction in which the telescopic portion 20 is contracted, from the base point, and the workpiece support portion including the moving base portion 31 from the moving base portion 31 as the base point 30 can be easily moved in the Y-axis direction, which is the direction in which the stretchable part 20 extends. For this reason, it is not necessary to deform the frame 10 when moving the work support part 30 in the extending / contracting direction of the extendable / contracting part 20, making it easy to manufacture an automatic machine for automatic feeding and facilitating automatic feeding. be able to.

  Further, since the jig engaging hole 31a is formed, the moving base 31 with respect to the moving base moving part 120 is engaged by engaging the moving base insertion pin 121 of the moving base moving part 120, which is a moving jig, with the jig engaging hole 31a. Can be stabilized with high accuracy, and the moving accuracy of the moving base 31 when the moving base moving portion 120 is moved can be increased.

  The pair of arm portions 32 and 32 are provided on both ends of the moving base 31 in the X-axis direction on the plus side in the Y-axis direction, which is the other end side of the moving base 31, and have a plate shape parallel to the XY plane. , Extending from one end side to the other end side of the moving base 31, that is, downward in FIG. 2. As shown in FIG. 3, on the extended end edges of the pair of arm portions 32, 32, an opposing portion protruding portion 33 </ b> B, 33 </ b> B, which will be described later, is one end portion and the other end portion in the X-axis direction of the workpiece end surface facing portion 33, respectively. Is connected. The arm portions 32, 32, the moving base portion 31, and the springs constituting the expandable portion 20 are disposed on the same XY plane. The arm parts 32 and 32 and the movement base part 31 correspond to XY plane direction parts.

  The workpiece end surface facing portion 33 has a plate shape whose outer shape parallel to the XZ plane has a substantially square shape, and is arranged at the center of the workpiece end surface facing portion 33 and has a plate-like substantially E-shaped portion 33A parallel to the XZ plane. Have. At the end in the X-axis direction of the substantially E-shaped portion 33A, there is a pair of substantially quadrangular plate-shaped opposed portion projecting portions 33B and 33B that project in the X-axis direction and are parallel to the XZ plane.

  As shown in FIG. 3, the Z-axis direction positive side edges of the pair of opposed protrusions 33 </ b> B and 33 </ b> B are oriented in the X-axis direction and connected to the extending edges of the pair of arm parts 32 and 32. Yes. The workpiece end surface facing portion 33 including the pair of facing portion projecting portions 33B and 33B has a plate shape that is parallel to the XZ plane as described above, and the arm portions 32 and 32 are positioned on the XY plane as described above. Since it has a parallel plate shape, the workpiece support section 30 is in a direction parallel to the XY plane from a direction parallel to the XY plane at a connection position between the pair of arm sections 32 and 32 and the pair of opposed protrusions 33B and 33B. The structure is bent vertically. The workpiece end surface facing portion 33 and the facing portion protruding portion 33B correspond to the XZ plane direction portion.

  As shown in FIG. 3, the substantially E-shaped portion 33A has a left portion 33C, a middle portion 33D, and a right portion 33E that extend in parallel, and the lower end shown in FIG. They are connected by a bottom wall portion 33F extending in the axial direction. Accordingly, the pair of opposed protrusions 33B and 33B described above are provided in the left part 33C and the right part 33E, respectively. The substantially E-shaped portion 33A can face and abut on an end surface in the axial direction which is the longitudinal direction of the workpiece 2 described later.

  A connecting portion 33G is provided at the end in the Z-axis direction of the left portion 33C as shown in FIG. A conductor (not shown), which is an insulation-coated copper wire, is wound around the conductor 33G, and the conductor 33G is welded together with the conductor (not shown) so that the conductor and the conductor 33G are electrically connected. Connected and connected.

  A claw portion 33H that is bent in a direction intersecting the XZ plane as shown in FIG. 3 is provided at the end in the Z-axis direction of the middle portion 33D. The claw portion 33 </ b> H is configured to prevent the workpiece 2 from being detached from the workpiece support portion 30 when the workpiece 2 is supported by the workpiece support portion 30 as described later.

  A work lower support portion 34 is connected to the bottom wall portion 33F. The negative side edge in the Y-axis direction of the workpiece lower support portion 34 is connected to the negative side edge in the Z-axis direction of the bottom wall portion 33F. At this connection position, the workpiece support portion 30 is from a direction parallel to the XZ plane. It is configured to be bent vertically in a direction parallel to the XY plane.

  The workpiece lower support portion 34 can face and abut on the side surface of the flange portion 2B provided at the axial end portion of the workpiece 2 which will be described later in the longitudinal direction. The work lower support part 34 and the work end face facing part 33 of the upper work support part 30 shown in FIG. 1, and the work lower support part 34 and the work end face facing part 33 of the lower work support part 30 shown in FIG. Thus, the work placement area 1a located between them is defined. Further, the substantially E-shaped portion 33A forms a terminal metal fitting as a terminal electrode fixed to a flange portion 2B of a core as a workpiece 2 described later.

  Connection portions of the opposing protrusions 33B and 33B connected to the arm portions 32 and 32, respectively, in the vicinity of the connection portions of the opposing protrusions 33B and 33B connected to the left portion 33C and the right portion 33E, respectively. A groove 33a is formed in the vicinity of. The groove 33a extends in the Z-axis direction, and is a surface opposite to the surface on the near side of the opposed portion protrusions 33B and 33B shown in FIG. 3, that is, an Sn-plated copper alloy base. Is formed so that a cross section cut by a plane parallel to the XY plane forms a V-shape on the surface on the side where is exposed. The groove 33a is formed from one end to the other end of the opposed protrusions 33B and 33B in the Z-axis direction.

  Since the groove 33a extending in the Z-axis direction is formed in this way, the workpiece 2 supported by the workpiece support 30 or the XZ plane direction portion of the workpiece support 30 is parallel to the YZ plane as will be described later. By applying a force in any direction, a twist with the groove 33a as a boundary is generated in the XZ plane direction portion, and the opposing portion protrusions 33B and 33B are cut and separated at the position where the groove 33a is formed in the XZ plane direction portion. The XZ plane direction portion can be cut and separated in the Z-axis direction without using a blade for cutting.

  Further, since the groove 33a is formed on the surface where the copper alloy base is exposed, it is not necessary to consider the thickness of the plating, and the depth of the groove 33a and the width of the groove 33a can be set with high accuracy. Can be a value. Moreover, it is possible to prevent generation of plating residue when forming the groove 33a.

  Further, as shown in FIG. 1, a pair of work support portions 30 are provided at the top and bottom of the drawing, one work support portion 30 is disposed so as to face one end of the work 2, and the other work support portion 30 is the work 2. It arrange | positions so that it may oppose the other end of. A pair of expansion / contraction portions 20 are also provided. One expansion / contraction portion 20 is connected to one work support portion 30 and the other expansion / contraction portion 20 is connected to the other work support portion 30. The configuration can be such that the one end side and the other end side are dispersedly arranged, and the workpiece 2 can be arranged at the center in the Y-axis direction of the lead frame 1 in the direction connecting the one end and the other end of the workpiece 2. it can.

  Moreover, when the expansion / contraction part is provided only on one end side or the other end side of the workpiece 2, the expansion / contraction part must have a desired maximum contraction amount, so that the dimension of the expansion / contraction part is long in the expansion / contraction direction of the expansion / contraction part. The other end with respect to one end of the stretchable part connected to the frame hangs down to a position off the XY plane, but in this embodiment, the size of the stretchable part 20 is compared with the stretchable direction of the stretchable part 20. Therefore, such a sag can be prevented as much as possible.

  As shown in FIG. 1, the workpiece 2 supported by the workpiece support portion 30 includes an intermediate portion 2A having a substantially cylindrical shape, and flange-shaped flange portions provided at both ends in the longitudinal direction of the intermediate portion 2A in the axial direction. And 2B. The flange portion 2B has a columnar shape having a diameter larger than that of the intermediate portion 2A and disposed coaxially with the intermediate portion 2A. As described later, when the workpiece 2 is arranged in the workpiece placement region 1a defined by the workpiece support portion 30, the workpiece end surface facing portion 33 of the workpiece support portion 30 faces the axial end surface of the flange portion 2B as described above. The workpiece lower support portion 34 of the workpiece support portion 30 is configured to abut against the circumferential surface which is the side surface of the flange portion 2B. The length of the workpiece 2 in the longitudinal direction, which is the axial direction, is about 7 mm.

  As described above, a plurality of expansion / contraction parts 20 are provided, and one work support part 30 is connected to each expansion / contraction part 20, and each work support part 30 has one flange 2 </ b> B that is an end in the axial direction of the work 2. It can be supported one by one. That is, the one stretchable part 20 and the other stretchable part 20 can be stretched independently of each other, the movable base 31 of the work support part 30 connected to the one stretchable part 20 and supporting the one work 2, and the other The movable base 31 of the workpiece support 30 that is connected to the other stretchable portion 20 and supports the other workpiece 2 is configured to be movable independently of each other. For this reason, each workpiece 2 can be moved to the workpiece placement area 1a one by one.

  Next, an automatic feeder 101 that automatically feeds the lead frame 1 and automatically places the lead frame 1 in the workpiece placement area 1a will be described with reference to FIGS. The automatic feeder 101 includes a frame support unit 110, a moving base moving unit 120, a moving base approaching driving unit 130 (FIG. 5), a moving base separating drive unit 140 (FIG. 5), and a pressing plate 150. And a feed roller.

  A pair of feed rollers (not shown) are provided such that their axial centers are oriented in the Y-axis direction, and a pair of pins protrude from the peripheral surface thereof. The paired pins can penetrate through the frame through-holes 11a of the lead frame 1 shown at the top and bottom of FIG. A long lead frame 1 is stretched between the pair of feed rollers in the X-axis direction, and the pair of feed rollers rotates so that the lead frame 1 is automatically fed from one feed roller to the other feed roller. It is configured.

  The frame support unit 110, the moving base moving unit 120, the moving base approaching driving unit 130, and the moving base separating drive unit 140 are disposed between a pair of feed rollers (not shown). As shown in FIG. 4, a pair of frame support portions 110 are provided in a substantially rectangular parallelepiped shape whose longitudinal direction is oriented in the X-axis direction, and the upper surfaces thereof can be opposed to the frame 10 of the lead frame 1. Twelve frame insertion pins 111 that can be inserted into the frame through holes 11a of the frame 10 are provided. In FIG. 4, only three frame insertion pins 111 appear. The distance between the pair of frame support portions 110 and 110 is configured to be unchanged. As shown in FIG. 5, the pair of frame support portions 110 and 110 are respectively formed with rod insertion holes 110a that are through holes penetrating in the Y-axis direction.

  As shown in FIG. 4, a pair of moving base moving parts 120 are provided in a substantially rectangular parallelepiped shape whose longitudinal direction is directed in the X-axis direction, and the upper surfaces thereof can be opposed to the moving base 31 of the work support part 30. Twelve movable base insertion pins 121 that can be inserted into the jig engaging holes 31a of the movable base 31 are provided. In FIG. 4, only three moving base insertion pins 121 appear. The pair of moving base moving parts 120 can move in the Y-axis direction so as to move away from each other, and the pair of moving base moving parts 120 is Y in a state where the moving base insertion pin 121 is inserted into the jig engaging hole 31a. By separating or approaching in the axial direction, the work support portions 30 including the moving base portions 31 that form a pair in the upper and lower directions in FIG. 1 are configured to move so as to be separated from or approach each other in the Y-axis direction. The moving base moving unit 120 corresponds to a moving jig.

  The moving base approaching drive unit 130 has a pair of rods 131 that are directed in the Y-axis direction and are movable in the Y-axis direction away from each other. The pair of rods 131 are rods of the frame support units 110 and 110, respectively. It penetrates the insertion hole. The pair of rods 131 and 131 are configured to be moved by pressing the pair of moving base moving parts 120 in directions approaching each other.

  The moving base separation drive unit 140 has a pair of plate-like portions 141 and 141 that can move in the Z-axis direction, and each of the pair of plate-like portions 141 and 141 has an inclined portion on the plus side in the Z-axis direction. Surfaces 141A and 141A are provided. The pair of inclined surfaces 141A and 141A provided on the pair of plate-like portions 141 and 141 respectively taper in a plus direction toward the Z-axis plus direction, and the pair of inclined surfaces 141A and 141A respectively move base movement. It is possible to contact the end 120A of the portion 120 on the minus side in the Z-axis direction. As the plate-like portions 141 and 141 having the pair of inclined surfaces 141A and 141A move toward the Z axis direction plus side, the pair of inclined surfaces 141A and 141A respectively move toward the Z axis direction minus side of the moving base portion moving unit 120. The pair of moving base moving parts 120 are configured to be in contact with the end parts and to be separated from each other in the Y-axis direction.

  The holding plate 150 has substantially the same shape as the connecting portion 11 of the frame 10, has a flat surface 150A parallel to the XY plane, and is formed with a holding plate through hole 150a into which the frame insertion pin 111 can be inserted. . By inserting the frame insertion pin 111 into the holding plate through hole 150a, the flat surface 150A can be opposed to the surface on the plus side of the Z axis direction of the frame 10 and the stretchable portion 20. The pressing plate 150 corresponds to a pressing member.

  The method for assembling the workpiece 2 into the lead frame 1 and the method for cutting the lead frame 1 are as follows. First, a work placement area expansion process is performed. In the work placement area expanding step, first, a pair of feed rollers (not shown) are rotated to feed the lead frame 1 from one feed roller side to the other feed roller side. Next, by lowering the lead frame 1 relative to the frame support part 110 toward the negative side in the Z-axis direction, as shown in FIG. 4, the frame insertion pin 111 is inserted into the frame through hole 11a, and at the same time, the jig The movement base insertion pin 121 of the movement base movement part 120 is inserted into the engagement hole 31a.

  Next, the frame insertion pin 111 is inserted into the presser plate through hole 150a of the presser plate 150, and the flat surface 150A of the presser plate 150 is opposed to the surface on the plus side in the Z-axis direction of the connecting portion 11 of the frame 10 and the telescopic portion 20. Place them in close contact. Thereafter, until the work support step is completed, the contact between the connecting portion 11 of the frame 10 and the surface on the plus side of the Z-axis direction of the expansion / contraction portion 20 and the flat surface 150A is maintained. As a result, it is possible to prevent the spring constituting the stretchable part 20 from being distorted in the direction perpendicular to the XY plane.

  Next, the plate-like portion 141 of the moving base separation drive unit 140 is moved to the plus side in the Z-axis direction, and the pair of inclined surfaces 141A, 141A of the plate-like portions 141, 141 are respectively minus in the Z-axis direction of the moving base moving portion 120. The workpiece support portions 30 that form a pair in the vertical direction in FIG. 1 are separated from each other in the Y-axis direction by bringing the pair of moving base portion moving portions 120 away from each other in the Y-axis direction. . As a result, the other end of the first extending portion 21B and the other end of the second extending portion 21C of the expandable portion 20 approach each other, and the entire expandable portion 20 contracts in the Y-axis direction. At this time, the workpiece placement area 1 a is in a state of being expanded with the movement of the workpiece support unit 30. The above is the work placement area expansion step.

  Next, a workpiece placement process is performed. In the work placement step, the work 2 is transported by a work transporter (not shown) while the work placement area 1a is expanded as described above, and the work 2 is moved as shown in the left side of FIG. 1 and FIG. The work 2 is placed in the work placement area 1a with the end face of the part 2B facing the work end face facing part 33 and the peripheral surface of the flange 2B facing the work lower support part 34. The above is the work placement process.

  Next, a work support process is performed. In the work support step, first, the plate-like portion 141 of the moving base separation drive unit 140 is moved to the minus side in the Z-axis direction, and the pair of inclined surfaces 141A and 141A of the plate-like portions 141 and 141 are respectively moved to the moving base moving portion 120. The state is not in contact with the end 120A on the negative side in the Z-axis direction. Next, by moving the rod 131 of the moving base approaching drive unit 130 in the direction approaching each other in the Y-axis direction, the pair of rods 131 and 131 press the pair of moving base moving parts 120 in the direction approaching each other, The work base region 31 is narrowed, and the moving base 31 is moved by the moving base moving part 120 until the end face in the axial direction of the flange 2B of the work 2 comes into contact with the work end face facing part 33 of the work supporting part 30. Then, when the end surface of the flange 2B of the workpiece 2 contacts the workpiece end surface facing portion 33 of the workpiece support portion 30, the workpiece 2 is supported by the workpiece support portion 30 that is paired up and down in FIG. The above is the work support process. The work placement process and the work support process correspond to the work placement support process.

  Next, a conductor wire (not shown) is wound around the connecting portion 33G of the workpiece end surface facing portion 33 and the intermediate portion 2A of the workpiece 2, and the connecting portion 33G and a conductor wire (not shown) are electrically connected by welding. To line. Next, all the partition parts 12 are cut and removed from the connecting part 11 using a punching die or the like. Next, an XZ plane direction part cutting process is performed. In the XZ plane direction portion cutting step, a force that acts on the workpiece 2 against the arm portions 32 and 32 in the direction parallel to the YZ plane is applied to the workpiece 2. Then, a twist with the groove 33a as a boundary easily occurs in the opposed portion protruding portion 33B, and the opposed portion protruding portion 33B is cut and separated at the position where the groove 33a is formed. Since cutting and separation are performed in this way, the XZ plane direction portion can be cut and separated in the Z-axis direction without using a blade for cutting. The above is the XZ plane direction cutting process.

  The lead frame according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, in the present embodiment, the stretchable portion 20 has a wave shape and has the three stretchable basic portions 21, but is not limited thereto. For example, as shown in FIG. 7, the stretchable part 1020 may have an S shape having two stretchable basic parts 1021, and the stretchable part 2020 faces W as shown in FIG. You may make the shape which was made to do. Even in this case, for example, as shown in FIG. 8, in the initial state in which no force is applied to the stretchable part 2020, the shortest distance A ′ between one end of the bending part 2021A and the other end of the bending part 2021A is It is longer than the shortest distance B ′ between the other end of the first extension portion 2021B and the other end of the second extension portion 2021C. Further, as shown in FIG. 9, the stretchable parts 20 and 20 ′ that form a pair at the top and bottom of the figure may have a shape that is point-symmetric about the center of gravity in the XY plane of the core arranged in the core arrangement region. Good.

  Further, the thickness of the plate-like body that is punched and bent to become the lead frame 1 is about 0.10 mm, and the width of the lead frame 1 in the longitudinal direction of the partition portion 12 of the frame 10 is about 22.6 mm. However, it is not limited to these values. The thickness of the plate-like body serving as the lead frame may be about 0.08 mm to 0.3 mm, and the width of the lead frame in the longitudinal direction of the partition part of the frame may be about 10 mm to 40 mm. Moreover, although the length in the longitudinal direction which is the axial direction of the workpiece | work 2 was about 7 mm, it is not limited to this value, What is necessary is just 5 mm-20 mm.

  Moreover, although the jig engagement hole 31a which is a through-hole was formed in the center position of the X-axis direction of the movement base 31, it is not limited to the jig engagement hole 31a, and the movement jig that can move in the Y-axis direction. Any structure that can be partially locked is acceptable. For example, as a protruding engagement portion that protrudes from a moving base instead of a hole, the protruding engagement portion engages with a part of the moving jig, and the moving jig and the moving base integrally move in the Y-axis direction. The structure which can be performed may be sufficient.

  Further, the automatic feeder 101 is configured such that a feed roller (not shown) feeds the lead frame 1 that is long in the X-axis direction, but is not limited thereto. For example, as a configuration in which a strip-shaped lead frame having 12 pairs of extending and contracting portions and work support portions 30 which are paired vertically in FIG. 1 is sent to the frame support portion 110, one strip-shaped lead frame is provided. It is good also as a structure which arrange | positions 12 workpiece | work simultaneously.

The top view which shows the lead frame which concerns on embodiment of this invention. The top view which shows the flame | frame of the lead frame which concerns on embodiment of this invention, one expansion-contraction part, and one workpiece support part. The perspective view which shows the flame | frame of the lead frame which concerns on embodiment of this invention, one expansion-contraction part, and one work support part. The perspective view which shows the automatic feeder for arrange | positioning a workpiece | work in the workpiece | work arrangement | positioning area | region of the lead frame which concerns on embodiment of this invention. Sectional drawing which shows the automatic feeder for arrange | positioning a workpiece | work in the workpiece | work arrangement | positioning area | region of the lead frame which concerns on embodiment of this invention. The perspective view which shows the state which has arrange | positioned the lead frame and the workpiece | work to the automatic feeder for arrange | positioning a workpiece | work in the workpiece | work arrangement | positioning area | region of the lead frame which concerns on embodiment of this invention. The top view which shows the modification of the lead frame which concerns on embodiment of this invention. The top view which shows the modification of the lead frame which concerns on embodiment of this invention. The top view which shows the modification of the lead frame which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lead frame 10 Frame 20 Expansion / contraction part 21 Expansion / contraction basic part 21A, 2021A Bending part 21B 1st extension part 21C 2nd extension part 30 Work support part 31 Movement base 31a Jig engagement hole 32 Arm part 33 Work end surface opposing part 33a Groove 33A Substantially E-shaped portion 33B Opposing portion projecting portion 34 Workpiece lower support portion 120 Moving base moving portion 150 Holding plate 150A Flat surface A, B Shortest distance C Virtual extension line

Claims (6)

Frame,
A stretchable portion connected to the frame and supported in a plane parallel to one virtual plane and stretchable on the one virtual plane;
A work support portion that is connected to and supported by the stretchable portion, is movable in the stretchable direction of the stretchable portion and that can place a work, and that can support the work;
A lead frame in which the stretchable part and the work support part are arranged and connected on the one virtual plane,
The expansion / contraction portion is connected to the bending portion, a first extension portion connected to one end of the bending portion, and the other end of the bending portion, and the expansion / contraction portion relative to the first extension portion on the one virtual plane. A spring provided with at least one expansion / contraction basic part having a second extension part that is relatively separable in the expansion / contraction direction of the part,
A lead frame, wherein a shortest distance between one end of the bending portion and the other end of the bending portion is longer than a shortest distance between the first extension portion and the second extension portion.   The lead frame according to claim 1, wherein the stretchable part includes three stretchable basic parts that are connected to each other to form a wave shape.   3. The lead frame according to claim 2, wherein the second extending portions of all of the extendable basic portions can be relatively separated from and approaching the first extending portion at the same distance at the same time.   A part of the stretchable part in the vicinity of the part connected to the frame is a part of the frame that faces a part in the vicinity of the part to which the stretchable part is connected through a gap. The lead frame according to claim 1, further comprising a facing portion.   5. The work support portion has a moving base portion that can be locked to a movable jig that is movable in the expansion / contraction direction of the expansion / contraction portion, and that is connected to the expansion / contraction portion. The lead frame according to one. A pair of the work support portions are provided, one of the work support portions is disposed to face one end of the work, and the other work support portion is disposed to face the other end of the work.
A pair of the stretchable parts are provided, one of the stretchable parts is connected to the one work support part, and the other stretchable part is connected to the other work support part. The lead frame according to claim 5.

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