Feeding device and feeding method for conveying lead frames

Abstract

Disclosed in the present invention are a feeding device and feeding method for conveying lead frames. The feeding device comprises a first driving unit (20), the first driving unit (20) comprising a first electric motor (21), a first driving wheel (22), a first transmission wheel (23), a second transmission wheel (24), a first direction-changing roller (25), a second direction-changing roller (26), and an endless belt (27), wherein the first driving wheel (22) is fixedly connected to an output shaft of the first electric motor (21); an inner side surface of the endless belt (27) surrounds partial side surfaces of the first driving wheel (22), the first transmission wheel (23), and the second transmission wheel (24), and teeth provided on the inner side surface of the endless belt (27) can mesh with teeth provided on the side surfaces of the first driving wheel (22), the first transmission wheel (23), and the second transmission wheel (24); an outer side surface of the endless belt (27) surrounds partial side surfaces of the first direction-changing roller (25) and the second direction-changing roller (26). The feeding device can significantly reduce the friction force during the conveyance of lead frames.

Description

A feeding device and a feeding method for conveying a lead frame TECHNICAL FIELD

[0001] The present application relates to the field of semiconductor chip processing and packaging, and in particular to a feeding device and a feeding method for conveying a lead frame. BACKGROUND

[0002] In the field of semiconductor chip processing and packaging, the lead frame is a strip-shaped thin plate. In the process of semiconductor chip processing and packaging, a dedicated conveying device is needed to convey the lead frame. The existing conveying device for conveying the lead frame places the lead frame in a U-shaped groove, and the lead frame slides at the bottom of the groove to realize the conveying of the lead frame. However, in the conveying process, the entire lower surface of the lead frame is in contact with the bottom of the groove, and the lead frame slides relative to the bottom of the groove to generate sliding friction, which results in a large friction force for the conveying of the lead frame. In addition, in the conveying process, the lead frame is easily blocked by obstacles. When the lead frame is blocked by obstacles, the phenomenon of the lead frame being blocked needs to be detected in time so as to stop the conveying of the lead frame in time. In addition, for the conveying of the lead frame, the starting position of the lead frame for one conveying action needs to be marked to reset in time after the conveying action is completed.

[0003] In view of the above problems, how to provide a feeding device for conveying a lead frame, which can reduce the friction force of the lead frame conveying, has become a technical problem to be solved by those skilled in the art. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a feeding device and a feeding method for conveying a lead frame, which can significantly reduce the friction force of the lead frame conveying.

[0005] To solve the above technical problems, the application adopts the following technical solutions:

[0006] The application discloses a feeding device for conveying a lead frame, which comprises a first driving unit; the first driving unit comprises a first motor, a first driving wheel, a first transmission wheel, a second transmission wheel, a first deflection roller, a second deflection roller and an annular belt; the inner side of the annular belt is provided with teeth, and the side of the first driving wheel, the first transmission wheel and the second transmission wheel is provided with teeth; the first driving wheel is fixedly connected with the output shaft of the first motor, so that the first motor can drive the first driving wheel to rotate; the inner side of the annular belt surrounds the part of the side of the first driving wheel, the first transmission wheel and the second transmission wheel, and the teeth provided on the inner side of the annular belt can be engaged with the teeth provided on the side of the first driving wheel, the first transmission wheel and the second transmission wheel, so that the first driving wheel can drive the annular belt to rotate, and the annular belt can further drive the first transmission wheel and the second transmission wheel to rotate; the outer side of the annular belt surrounds the part of the side of the first deflection roller and the second deflection roller, so that the annular belt can change the direction at the first deflection roller and the second deflection roller respectively; the first driving wheel, the first transmission wheel, the second transmission wheel, the first deflection roller and the second deflection roller tighten the annular belt.

[0007] Preferably, the feeding device further comprises a bearing unit; the bearing unit comprises a first base plate, a first stand, a second stand and a second base plate; the first driving unit further comprises a first mounting plate; the first base plate and the second base plate are both rectangular plate bodies, and the first base plate and the second base plate are fixedly arranged relative to the ground; the first stand and the second stand are fixedly arranged at the two ends of the front of the first base plate respectively, and the first stand and the second stand are along the outer side edges of the front of the first base plate; the first motor is arranged below the first base plate, and the first motor is fixedly connected with the first base plate by means of the first mounting plate; the central shaft of the first transmission wheel is fixedly arranged on the first stand, and the first transmission wheel can rotate around the central shaft; the central shaft of the second transmission wheel is fixedly arranged on the second stand, and the second transmission wheel can rotate around the central shaft; the central shaft of the first deflection roller and the central shaft of the second deflection roller are both fixedly arranged on the outer side of the first base plate, and the first deflection roller and the second deflection roller can rotate around the respective central shafts.

[0008] Further preferably, the feeding device further comprises a slide rail assembly; the slide rail assembly comprises a first linear slide rail, a first slide block, a first step-shaped piece, an L-shaped piece, and a cover plate; the front surface of the first base plate is provided with a U-shaped groove near the inner side edge thereof; the first linear slide rail is in the shape of an elongated cuboid as a whole, and is fixedly arranged in the U-shaped groove of the first base plate; the back surface of the first slide block is provided with a U-shaped opening, and the first linear slide rail is clamped in the U-shaped opening of the first slide block, so that the first slide block can slide along the first linear slide rail; the first step-shaped piece comprises a body portion, a first wing plate, and a second wing plate; the body portion is in the shape of a cuboid, the first wing plate and the second wing plate are fixedly arranged on the two side surfaces of the body portion respectively, the front surface of the body portion is upwardly stepped relative to the front surface of the first wing plate, the front surface of the body portion is upwardly stepped relative to the front surface of the second wing plate, the back surface of the body portion and the back surface of the second wing plate are located in the same plane, and the back surface of the body portion is downwardly stepped relative to the back surface of the first wing plate; the back surface of the first wing plate of the first step-shaped piece is fixedly connected with the front surface of the first slide block; the side surface of the second wing plate of the first step-shaped piece, which is away from the body portion, is fixedly connected with the free end of the bottom arm of the L-shaped piece; the extending arm of the L-shaped piece is fixedly connected with the cover plate, and the front surface of the extending arm of the L-shaped piece and the back surface of the cover plate form a gap therebetween; a ring-shaped belt is fixedly arranged in the gap between the front surface of the extending arm of the L-shaped piece and the back surface of the cover plate, and the teeth on the inner side surface of the ring-shaped belt are engaged with the teeth arranged on the front surface of the extending arm of the L-shaped piece, so that the ring-shaped belt can drive the L-shaped piece to move synchronously.

[0009] Further preferably, the feeding device further comprises a chute assembly; the chute assembly comprises a first chute wall piece, a first chute bottom rail, a second chute bottom rail, a third chute bottom rail, and a second chute wall piece; the first chute wall piece comprises a first chute wall main body part and a first flange part, the first flange part is fixedly arranged at the lower end of the first chute wall main body part and protrudes inward relative to the first chute wall main body part, and the outer side of the first chute wall main body part is provided with a step part; the first chute bottom rail comprises a first rail main body part, a first vertical wall, and a second vertical wall, the first vertical wall and the second vertical wall are fixedly arranged at the upper end surface of the first rail main body part, the first vertical wall and the second vertical wall are parallel to each other, and the first vertical wall, the second vertical wall, and the upper end surface of the first rail main body part form a U-shaped needle poking groove; the outer side of the first rail main body part of the first chute bottom rail is in close contact with the inner side of the first chute wall main body part of the first chute wall piece and is fixedly connected with the same, and the lower end of the first rail main body part of the first chute bottom rail is in abutment with the upper surface of the first flange part of the first chute wall piece, the first flange part of the first chute wall piece supports and limits the first chute bottom rail; the second chute bottom rail comprises a strip-shaped vertical rail part and at least two tail parts, all the tail parts are fixedly arranged at the lower end of the strip-shaped vertical rail part, all the tail parts extend outward relative to the strip-shaped vertical rail part, and all the tail parts are perpendicular to the strip-shaped vertical rail part; the second chute bottom rail is parallel to the first chute bottom rail and a first spacing is arranged between the second chute bottom rail and the first chute bottom rail; the third chute bottom rail comprises a third rail main body part and a horn part, the horn part is fixedly arranged at the corner where the upper end surface of the third rail main body part intersects with the inner side surface thereof, the third rail main body part and the horn part both have a rectangular cross section, the cross section of the third rail main body part and the cross section of the horn part are mutually overlapped to form a horn shape, the upper end surface of the horn part is higher than the upper end surface of the third rail main body part, the lower end surface of the horn part is lower than the upper end surface of the third rail main body part, the inner side surface of the horn part is located inside the inner side surface of the third rail main body part, the outer side surface of the horn part is located outside the inner side surface of the third rail main body part, and the outer side surface of the horn part is located inside the outer side surface of the third rail main body part; the second chute wall piece is a strip-shaped plate body; the outer side surface of the first chute wall main body part of the first chute wall piece is in close contact with the inner side surface of the first base plate and is fixedly connected with the same, the intersection between the upper surface and the inner side surface of the first base plate is an inner upper corner of the first base plate, the inner upper corner of the first base plate is clamped with the step part of the first chute wall main body part, and the first base plate limits the first chute wall piece; the upper surfaces of all the tail parts of the second chute bottom rail are in close contact with the lower bottom surface of the second base plate and are fixedly connected with the same; the lower bottom surface of the third rail main body part of the third chute bottom rail is in close contact with the upper surface of the inner side sub plate part of the second base plate and is fixedly connected with the same, the outer side surface of the third rail main body part is in close contact with the inner side surface of the middle sub plate part, and the middle sub plate part limits the third rail main body part; the third chute bottom rail is parallel to the second chute bottom rail and a second spacing is arranged between the third chute bottom rail and the second chute bottom rail.The lower bottom surface of the second slot wall member is attached to and fixedly connected with the upper surface of the middle sub-plate portion, and the lower bottom surface of the second slot wall member is higher than the upper surface of the third rail main body portion; the inner side surface of the second slot wall member is attached to the outer side surface of the horn portion; the first slot wall member, the first slot bottom rail, the second slot bottom rail, the third slot bottom rail, and the second slot wall member are parallel to each other; the upper end surfaces of the first vertical wall, the second vertical wall, the strip-shaped vertical rail portion, and the horn portion are located in the same horizontal plane, and the horizontal plane is a reference surface; the upper end surface of the first slot wall main body portion of the first slot wall member is higher than the reference surface, and the upper surface of the second slot wall member is higher than the reference surface; the first slot wall member, the first slot bottom rail, the second slot bottom rail, the third slot bottom rail, and the second slot wall member form a conveying chute through which the lead frame passes, and the width of the conveying chute matches the width of the single-piece lead frame to be conveyed; the first slot bottom rail, the second slot bottom rail, and the third slot bottom rail are used to support the lead frame; and the first slot wall member and the second slot wall member are used to shield and limit the edges of the lead frame.

[0010] Further preferably, the feeding device further comprises a needle poking assembly; the needle poking assembly is fixedly arranged on the first step-shaped member; the needle poking assembly comprises a needle, which is arranged above the conveying chute in the vertical direction, and the needle tip portion of the needle faces downward.

[0011] Further preferably, the feeding device further comprises a second driving unit; the second driving unit is fixedly connected with the slide rail assembly; the second driving unit comprises a mounting seat, a second motor, a second mounting plate, an eccentric wheel, a transmission roller, and a driving arm; the mounting seat is an L-shaped plate body as a whole; the mounting seat comprises a bottom plate, an extension plate, and a convex beam, one end of the bottom plate is fixedly connected with one end of the extension plate to form an L shape, and the convex beam is fixedly arranged on the back surface of the bottom plate; the mounting seat is fixedly connected with the first step-shaped member of the slide rail assembly, and one side surface of the convex beam of the mounting seat is attached to and fixedly connected with the side surface of the first step-shaped member of the slide rail assembly, on which the second wing plate is arranged; the second motor is fixedly arranged on the front surface of the bottom plate; the second mounting plate is fixedly mounted on one end of the second motor, and one end of the second mounting plate is fixedly connected with the side surface of the mounting seat; one end of the output shaft of the second motor penetrates through the through hole of the second mounting plate, and the eccentric wheel is fixedly sleeved on the one end of the output shaft of the second motor penetrating through the second mounting plate, so that the output shaft of the second motor can drive the eccentric wheel to rotate; the central shaft of the transmission roller is fixedly arranged on one end of the driving arm, and the transmission roller can rotate around the central shaft; and the surface of the transmission roller is attached to the outer circumferential surface of the eccentric wheel.

[0012] Further preferably, the second driving unit further comprises a first pin, a first spring and a second pin; one end of the first pin is fixedly arranged on the driving arm, one end of the second pin is fixedly arranged on the second mounting plate; the upper end of the first spring is elastically connected with the free end of the first pin, the lower end of the first spring is elastically connected with the free end of the second pin, and the elastic force exerted by the first spring on the conducting roller through the first pin and the driving arm enables the surface of the conducting roller to be closely attached to the outer circumferential surface of the eccentric wheel; the middle position of the driving arm is provided with a containing groove, one end of the first pin is fixedly arranged in the containing groove of the driving arm, and the containing groove is used for providing a containing space for the first pin and the first spring.

[0013] Further preferably, the feeding device further comprises a linear moving assembly; the linear moving assembly is movably connected with the second driving unit; the linear moving assembly comprises a second slider and a first cross ball guide rail assembly; the cross section of the second slider is U-shaped; the first cross ball guide rail assembly comprises at least two branch guide rails, the first cross ball guide rail assembly is located in the second slider and extends along the vertical direction, and the first branch guide rail of the first cross ball guide rail assembly is fixedly installed on the inner bottom surface of the second slider, and the second branch guide rail of the first cross ball guide rail assembly is fixedly installed on the side surface of the extension plate of the mounting seat which faces away from the bottom plate, so that the second slider can linearly slide along the vertical direction relative to the extension plate of the mounting seat; one end of the driving arm which is not provided with the conducting roller is fixedly connected with the outer side surface of one extension arm of the second slider; when the output shaft of the second motor drives the eccentric wheel to reciprocating rotate, the eccentric wheel can exert a force on the second slider through the conducting roller and the driving arm, so that the second slider linearly moves along the vertical direction periodically.

[0014] Further preferably, the feeding device further comprises a needle poking assembly; the needle poking assembly comprises a spoon-shaped piece, a handle piece and a poking needle; the spoon-shaped piece comprises a spoon head and a spoon handle; the handle piece is in the shape of an elongated cuboid as a whole; the spoon handle of the spoon-shaped piece is fixedly connected with the outer bottom surface of the second slider, the handle piece is fixedly arranged on the spoon head of the spoon-shaped piece, and the poking needle is fixedly arranged on one end of the handle piece; the poking needle is arranged above the conveying chute along the vertical direction, and the needle tip of the poking needle faces downward.

[0015] Further preferably, the linear moving assembly further comprises a third slider and a second cross ball guide rail assembly; the cross section of the third slider is U-shaped; the second cross ball guide rail assembly comprises at least two branch guide rails, the second cross ball guide rail assembly is located in the third slider and extends along the horizontal direction, and the first branch guide rail of the second cross ball guide rail assembly is fixedly installed on the inner bottom surface of the third slider, and the second branch guide rail of the second cross ball guide rail assembly is fixedly installed on the outer bottom surface of the second slider, so that the third slider can linearly slide along the horizontal direction relative to the second slider.

[0016] Further preferably, the feeding device further comprises a needle poking assembly; the needle poking assembly comprises a spoon, a handle, and a needle; the spoon comprises a spoon head and a spoon handle; the handle is in the shape of an elongated cuboid; the spoon handle of the spoon is fixedly connected to the bottom surface of the third slider; the spoon head of the spoon is provided with a handle recess; the handle is fixedly arranged in the handle recess of the spoon head; the needle is fixedly arranged at one end of the handle; the needle is arranged above the conveying chute in the vertical direction, and the needle tip is downward.

[0017] Further preferably, the linear moving assembly further comprises a hook, a first sensor mounting rack, a nose, a second spring, and a third pin; the first sensor mounting rack is in the shape of a U; the first sensor mounting rack is fixedly arranged on the outer side surface of the second slider, and the first sensor mounting rack and the driving arm are located on the same side surface of the second slider; the hook handle is fixedly connected to the bottom surface of the third slider; the hook extends in the horizontal direction, and the hook tip is located between the two extension arms of the first sensor mounting rack; the two extension arms of the first sensor mounting rack are respectively used for mounting the first light emitting sensor and the first light receiving sensor; one end of the nose is fixedly arranged on the outer side surface of one extension arm of the second slider, and the extension arm of the second slider is away from the driving arm; one end of the third pin is fixedly arranged on the bottom surface of the third slider; the second spring extends in the horizontal direction; one end of the second spring is elastically connected to the free end of the third pin, and the other end of the second spring is elastically connected to the free end of the nose; the elastic force of the second spring on the third slider via the third pin makes the third slider close to the nose, and the third slider in turn drives the spoon, the handle, and the needle to close to the nose.

[0018] Further preferably, the conveying device further comprises a calibration unit, the calibration unit comprising a marker wheel, a connecting piece, and a second sensor mounting rack; the marker wheel is fixedly installed at one end of the output shaft of the second motor away from the eccentric wheel, so that the output shaft of the second motor can synchronously drive the eccentric wheel and the marker wheel to rotate; the second sensor mounting rack is in the shape of a U as a whole; one end of the connecting piece is fixedly connected with one side surface of the second motor, and the other end of the connecting piece is fixedly connected with the second sensor mounting rack; the outer edge of the marker wheel is located between the two extension arms of the second sensor mounting rack; the two extension arms of the second sensor mounting rack are respectively used for mounting the second light emitting sensor and the second light receiving sensor; the edge of the marker wheel is provided with only one notch; the notch of the marker wheel can mark the starting position of the second motor and the eccentric wheel, and further can mark the starting position of the conveying action; when the second motor and the eccentric wheel are at the starting position, the notch of the marker wheel is located between the two extension arms of the second sensor mounting rack, and the second light receiving sensor can receive the light signal emitted from the second light emitting sensor; when the second motor and the eccentric wheel are at the remaining positions, the notch of the marker wheel deviates from between the two extension arms of the second sensor mounting rack, and the light signal emitted from the second light emitting sensor is blocked by the eccentric wheel, resulting in that the second light receiving sensor cannot receive the light signal emitted from the second light emitting sensor; after one conveying action of the lead frame is completed, the output shaft of the second motor reversely rotates and drives the eccentric wheel to return to the starting position thereof, and in this process, the second motor also synchronously drives the marker wheel to return to the state that the notch is located between the two extension arms of the second sensor mounting rack.

[0019] Further preferably, one side edge of the first substrate is provided with a U-shaped opening, the upper end of the first mounting plate is arranged in the U-shaped opening of the first substrate, and the first mounting plate is fixedly connected with the side surface of the first substrate; one end of the first motor provided with an output shaft is fixedly connected with the first mounting plate, the output shaft of the first motor passes through the through hole arranged on the first mounting plate, and the first substrate and the first motor are located on the same side of the first mounting plate.

[0020] Further preferably, the lengths of the first slot wall piece, the first slot bottom strip rail, the second slot bottom strip rail, the third slot bottom strip rail, and the second slot wall piece all match the length of the single-piece lead frame.

[0021] Further preferably, the second slot bottom strip rail comprises two T-shaped tail portions, the two tail portions are respectively fixedly arranged at the two ends of the strip-shaped vertical rail portion, and the end with a larger width of each tail portion along the extension direction of the strip-shaped vertical rail portion is fixedly connected with the lower end of the strip-shaped vertical rail portion, and the end with a smaller width of each tail portion along the extension direction of the strip-shaped vertical rail portion extends outward relative to the strip-shaped vertical rail portion;

[0022] Further preferably, the first groove wall body part of the first groove wall member is provided with a first chamfer at the intersection of the upper surface and the inner side surface thereof, and the upper surface of the second groove wall member is provided with a second chamfer at the intersection of the upper surface and the inner side surface thereof, the first chamfer and the second chamfer facilitating the placement of the lead frame into the conveying slide groove.

[0023] An upper feeding method for conveying a lead frame, the upper feeding method employing the upper feeding device described above, the upper feeding method comprising the following steps:

[0024] S1: placing the lead frame to be conveyed into the conveying slide groove, the lead frame being located between the first groove wall member and the second groove wall member, and the lead frame being located above the first groove bottom strip rail, the second groove bottom strip rail and the third groove bottom strip rail of the slide groove assembly;

[0025] S2: the second motor is turned on, the second motor drives the second sliding block of the linear movement assembly to move linearly along the vertical direction downward via the eccentric wheel, the transmission roller and the driving arm, the second sliding block in turn drives the needle of the needle poking assembly to move linearly along the vertical direction downward via the third sliding block and the second cross ball guide rail assembly, the downward movement of the needle along the vertical direction causes the needle tip part of the needle to penetrate into the needle groove of the first groove bottom strip rail and into the through hole of the side edge of the lead frame, and then the second motor is turned off;

[0026] S3: the first motor is turned on, the first motor drives the annular belt to rotate, the annular belt in turn drives the first stepped member to move linearly along the horizontal direction forward via the L-shaped member and the cover plate, the first stepped member in turn drives the second sliding block to move linearly along the horizontal direction forward via the mounting seat and the first cross ball guide rail assembly, the second sliding block in turn drives the needle to move linearly along the horizontal direction forward via the third sliding block and the second cross ball guide rail assembly, the needle in turn drives the lead frame to move linearly along the conveying slide groove by a set distance, and then the first motor is turned off;

[0027] S4: the second motor is turned on, the second motor drives the second sliding block of the linear movement assembly to move linearly along the vertical direction upward via the eccentric wheel, the transmission roller and the driving arm, the second sliding block in turn drives the needle to move linearly along the vertical direction upward via the third sliding block and the second cross ball guide rail assembly, so that the needle tip part of the needle penetrates out of the needle groove of the first groove bottom strip rail and the through hole of the edge of the lead frame and the needle is reset, and then the second motor is turned off;

[0028] S5: the first motor is turned on, the first motor drives the annular belt to rotate, the annular belt in turn drives the first stepped member to move linearly along the horizontal direction backward via the L-shaped member and the cover plate, the first stepped member in turn drives the second sliding block to move linearly along the horizontal direction backward via the mounting seat and the first cross ball guide rail assembly, the second sliding block in turn drives the needle to move linearly along the horizontal direction backward by a set distance via the third sliding block and the second cross ball guide rail assembly, and then the first motor is turned off.

[0029] Repeating the steps S2 to S5 until the lead frame leaves the conveying chute, and the feeding is completed.

[0030] A feeding method for conveying a lead frame, which adopts the feeding device described above, and the feeding method comprises the following steps:

[0031] S1: placing the lead frame to be conveyed in the conveying chute, the lead frame being located between the first groove wall member and the second groove wall member, and the lead frame being located above the first groove bottom strip rail, the second groove bottom strip rail and the third groove bottom strip rail of the chute assembly;

[0032] S2: the second motor is started, the second motor drives the second sliding block of the linear moving assembly to move linearly along the vertical direction downward via the eccentric wheel, the transmission roller and the driving arm, the second sliding block in turn drives the needle of the needle poking assembly to move linearly along the vertical direction downward via the third sliding block and the second cross ball guide rail assembly, so that the needle tip of the needle is below the lower surface of the lead frame and close to the edge of the rear end of the lead frame, at this time, the needle tip of the needle and the edge of the rear end of the lead frame are not directly in contact but there is a gap between them, and then the second motor is stopped;

[0033] S3: the first motor is started, the first motor drives the annular belt to rotate, the annular belt in turn drives the first stepped member to move linearly along the horizontal direction forward via the L-shaped member and the cover plate, the first stepped member in turn drives the second sliding block to move linearly along the horizontal direction forward via the mounting seat and the first cross ball guide rail assembly, the second sliding block in turn drives the needle to move linearly along the horizontal direction forward via the third sliding block and the second cross ball guide rail assembly, the needle directly contacts the rear end of the lead frame and pushes the lead frame to move linearly along the conveying chute forward until the lead frame leaves the conveying chute, then the first motor is stopped, and the feeding is completed.

[0034] Unless otherwise specified, each raw material in the present application can be obtained by commercial purchase, and the equipment used in the present application can adopt conventional equipment in the field or refer to the existing technology in the field.

[0035] Compared with the prior art, the present application has the following beneficial effects:

[0036] (1) The feeding device for conveying lead frames comprises a chute assembly, the chute assembly comprises a first chute wall piece, a first chute bottom strip rail, a second chute bottom strip rail, a third chute bottom strip rail, and a second chute wall piece, and a conveying chute for conveying lead frames is formed by the above-mentioned components of the chute assembly, the chute bottom of the conveying chute is actually composed of the first chute bottom strip rail, the second chute bottom strip rail, and the third chute bottom strip rail, the lower surface of the lead frame in conveying is in contact with the upper end surfaces of the above-mentioned three strip rails constituting the chute bottom of the conveying chute and slides relative to each other, compared with the conveying chute which is completely closed and connected as a whole plate, the contact area of the lead frame and the chute bottom of the conveying chute is obviously reduced, so that the friction between the lead frame and the conveying chute is obviously reduced.

[0037] (2) The feeding device for conveying lead frames comprises a first driving unit, a slide rail assembly, a second driving unit, a linear moving assembly, and a needle poking assembly; the second driving unit is fixedly connected with the slide rail assembly; the linear moving assembly is movably connected with the second driving unit; the needle poking assembly is fixedly arranged on the first step-shaped piece of the slide rail assembly; the needle poking assembly comprises a needle, the needle is arranged in a vertical direction and the needle tip part thereof faces downward; the needle can be driven by the second driving unit to move downward along the vertical direction and penetrate into or out of the through hole of one side edge of the lead frame; the needle can be driven by the first driving unit to move linearly along the horizontal direction, and the needle drives the lead frame to move linearly along the conveying chute, so that the conveying of the lead frame is realized.

[0038] (3) The feeding device for conveying lead frames comprises a calibration unit, the calibration unit comprises a marking wheel, a connecting piece, and a second sensor mounting rack, the edge of the marking wheel is provided with only one notch, the starting position of the second motor and the eccentric wheel can be marked by the notch of the marking wheel, and then the starting position of the needle conveying action can be marked. BRIEF DESCRIPTION OF DRAWINGS

[0039] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings

[0040] Fig. 1 is a perspective view of the feeding device for conveying lead frames according to the embodiment of the present application;

[0041] Fig. 2 is a perspective view of the bearing unit and the first driving unit part of the feeding device for conveying lead frames according to the embodiment of the present application;

[0042] Fig. 3 is an exploded view of the first driving unit and the slide rail assembly part of the feeding device for conveying lead frames according to the embodiment of the present application;

[0043] Figure 4 is a partial perspective view of a slide rail assembly of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0044] Figure 5 is a perspective view of a carrier unit and a chute assembly of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0045] Figure 6 is an exploded view of the carrier unit and the chute assembly of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0046] Figure 7 is a partial exploded view of the chute assembly of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0047] Figure 8 is another partial exploded view of the chute assembly of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0048] Figure 9 is a cross-sectional view of the carrier unit and the chute assembly of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0049] Figure 10 is a perspective view of a second driving unit and a linear moving assembly of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0050] Figure 11 is another perspective view of the second driving unit and the linear moving assembly of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0051] Figure 12 is an exploded view of a needle pushing assembly, the second driving unit and the linear moving assembly of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0052] Figure 13 is a perspective view of an eccentric wheel of the second driving unit of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0053] Figure 14 is a front view of the eccentric wheel of the second driving unit of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0054] Figure 15 is a perspective view of a driving arm of the second driving unit of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0055] Figure 16 is a perspective view of a second sliding block of the second driving unit of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0056] Figure 17 is a perspective view of a third sliding block of the second driving unit of the feeding device for transferring the lead frame according to an embodiment of the present application;

[0057] Fig. 18 is a perspective view of a spoon of a third sliding block of a needle poking assembly of the feeding device for transferring lead frames according to an embodiment of the present application;

[0058] Fig. 19 is a schematic view of a feeding method of the feeding device for transferring lead frames according to an embodiment of the present application;

[0059] Fig. 20 is a schematic view of a feeding method of the feeding device for transferring lead frames according to an embodiment of the present application. DETAILED DESCRIPTION

[0060] In order to more clearly illustrate the present application, the present application will be further described below in conjunction with preferred embodiments. It should be understood by those skilled in the art that the specific description below is illustrative rather than limiting and should not be used to limit the scope of the present application.

[0061] As shown in Figs. 1 and 5, the feeding device for transferring lead frames according to the present embodiment comprises a carrying unit 10, a first driving unit 20, a sliding rail assembly 30, a sliding groove assembly 40, and a needle poking assembly 50.

[0062] As shown in Figs. 2 and 3, the carrying unit 10 comprises a first base plate 11, a first vertical column 12, a second vertical column 13, and a second base plate 15. The first base plate 11 and the second base plate 15 are both rectangular plate bodies, and the first base plate 11 and the second base plate 15 are both fixedly arranged relative to the ground. The first vertical column 12 and the second vertical column 13 are respectively fixedly arranged at two ends of a front face of the first base plate 11, and the first vertical column 12 and the second vertical column 13 are along an outer side edge of the front face of the first base plate 11. A U-shaped groove 14 is arranged at a position of the front face of the first base plate 11 close to an inner side edge of the first base plate 11.

[0063] The first driving unit 20 comprises a first motor 21, a first driving wheel 22, a first transmission wheel 23, a second transmission wheel 24, a first steering roller 25, a second steering roller 26, an annular belt 27, and a first mounting plate 28. The first motor 21 is arranged below the first base plate 11, and the first motor 21 is fixedly connected with the first base plate 11 by means of the first mounting plate 28. In the present embodiment, the first mounting plate 28 is, for example, rectangular; one side edge of the first base plate 11 is provided with a U-shaped opening, the upper end of the first mounting plate 28 is arranged in the U-shaped opening of the first base plate 11, and the first mounting plate 28 is fixedly connected with the side surface of the first base plate 11; one end of the first motor 21 provided with an output shaft is fixedly connected with the first mounting plate 28, the output shaft of the first motor 21 passes through a through hole arranged on the first mounting plate 28, and the first base plate 11 and the first motor 21 are located on the same side of the first mounting plate 28. The inner side surface of the annular belt 27 is provided with teeth, and the side surfaces of the first driving wheel 22, the first transmission wheel 23, and the second transmission wheel 24 are all provided with teeth. The first driving wheel 22 is fixedly connected with the output shaft of the first motor 21, so that the first motor 21 can drive the first driving wheel 22 to rotate; the central shaft of the first transmission wheel 23 is fixedly arranged on the first vertical column 12 of the bearing unit 10, and the first transmission wheel 23 can rotate around the central shaft; the central shaft of the second transmission wheel 24 is fixedly arranged on the second vertical column 13 of the bearing unit 10, and the second transmission wheel 24 can rotate around the central shaft; the central shaft of the first steering roller 25 and the central shaft of the second steering roller 26 are both fixedly arranged on the outer side surface of the first base plate 11, and the first steering roller 25 and the second steering roller 26 can both rotate around the respective central shafts; the inner side surface of the annular belt 27 surrounds part of the side surfaces of the first driving wheel 22, the first transmission wheel 23, and the second transmission wheel 24, and the teeth arranged on the inner side surface of the annular belt 27 can mesh with the teeth arranged on the side surfaces of the first driving wheel 22, the first transmission wheel 23, and the second transmission wheel 24, so that the first driving wheel 22 can drive the annular belt 27 to rotate, and the annular belt 27 can in turn drive the first transmission wheel 23 and the second transmission wheel 24 to rotate; the outer side surface of the annular belt 27 surrounds part of the side surfaces of the first steering roller 25 and the second steering roller 26, so that the annular belt 27 can change direction at the first steering roller 25 and the second steering roller 26, respectively; and the first driving wheel 22, the first transmission wheel 23, the second transmission wheel 24, the first steering roller 25, and the second steering roller 26 tighten the annular belt 27.

[0064] As shown in FIG. 3 and FIG. 4, the slide rail assembly 30 comprises a first linear slide rail 31, a first slider 32, a first stepped piece 33, an L-shaped piece 34, and a cover plate 35; the first linear slide rail 31 is in the shape of an elongated cuboid as a whole, and is fixedly arranged in the U-shaped groove 14 of the first base plate 11; the back surface of the first slider 32 is provided with a U-shaped opening, and the first linear slide rail 31 is clamped in the U-shaped opening of the first slider 32, so that the first slider 32 can slide along the first linear slide rail 31. The first stepped piece 33 comprises a body part 33-1, a first wing plate 33-2, and a second wing plate 33-3; the body part 33-1 is in the shape of a cuboid, and the first wing plate 33-2 and the second wing plate 33-3 are fixedly arranged on the two side surfaces of the body part 33-1 respectively; the front surface of the body part 33-1 is an upward rising step relative to the front surface of the first wing plate 33-2 (the front surface of the body part 33-1 is higher than the front surface of the first wing plate 33-2); the front surface of the body part 33-1 is an upward rising step relative to the front surface of the second wing plate 33-3 (the front surface of the body part 33-1 is higher than the front surface of the second wing plate 33-3); the back surface of the body part 33-1 is in the same plane with the back surface of the second wing plate 33-3 (i.e. they are flush); and the back surface of the body part 33-1 is a downward rising step relative to the back surface of the first wing plate 33-2 (the back surface of the body part 33-1 is lower than the back surface of the first wing plate 33-2). The back surface of the first wing plate 33-2 of the first stepped piece 33 is fixedly connected with the front surface of the first slider 32; the side surface of the second wing plate 33-3 of the first stepped piece 33, which is away from the body part 33-1, is fixedly connected with the free end of the bottom arm of the L-shaped piece 34; the extension arm of the L-shaped piece 34 is fixedly connected with the cover plate 35, and a gap is formed between the front surface of the extension arm of the L-shaped piece 34 and the back surface of the cover plate 35; the annular belt 27 is fixedly arranged in the gap between the front surface of the extension arm of the L-shaped piece 34 and the back surface of the cover plate 35, and the inner side teeth of the annular belt 27 are engaged with the teeth arranged on the front surface of the extension arm of the L-shaped piece 34, so that the annular belt 27 can drive the L-shaped piece 34 to move synchronously.

[0065] As shown in FIG. 5, FIG. 6, FIG. 7, FIG. 8, and FIG. 9, the slide groove assembly 40 comprises a first groove wall piece 41, a first groove bottom strip rail 42, a second groove bottom strip rail 43, a third groove bottom strip rail 44, and a second groove wall piece 45.

[0066] The first slot wall member 41 comprises a first slot wall main body portion 41-1 and a first flange portion 41-2 fixedly arranged at the lower end of the first slot wall main body portion 41-1 and protruding inwardly relative to the first slot wall main body portion 41-1, and a stepped portion 41-3 arranged on the outer side of the first slot wall main body portion 41-1; the first slot bottom rail 42 comprises a first rail main body portion 42-1, a first vertical wall 42-2 and a second vertical wall 42-3 fixedly arranged on the upper end surface of the first rail main body portion 42-1, the first vertical wall 42-2 and the second vertical wall 42-3 are parallel to each other, and the first vertical wall 42-2, the second vertical wall 42-3 and the upper end surface of the first rail main body portion 42-1 form a U-shaped needle lifting groove 42-4.

[0067] The outer side of the first rail main body portion 42-1 of the first slot bottom rail 42 is in close contact with the inner side of the first slot wall main body portion 41-1 of the first slot wall member 41 and the two are fixedly connected, and the lower end of the first rail main body portion 42-1 of the first slot bottom rail 42 abuts against the upper surface of the first flange portion 41-2 of the first slot wall member 41, and the first flange portion 41-2 of the first slot wall member 41 supports and limits the first slot bottom rail 42.

[0068] The second slot bottom rail 43 comprises a strip-shaped vertical rail portion 43-1 and at least two tail portions 43-2, all of the tail portions 43-2 are fixedly arranged at the lower end of the strip-shaped vertical rail portion 43-1, all of the tail portions 43-2 extend outwardly relative to the strip-shaped vertical rail portion 43-1, and all of the tail portions 43-2 are perpendicular to the strip-shaped vertical rail portion 43-1. In this embodiment, the second slot bottom rail 43 comprises, for example, two T-shaped tail portions 43-2 (as shown in FIG. 6), which are respectively fixedly arranged at the two ends of the strip-shaped vertical rail portion 43-1, and the end with a larger width of each tail portion 43-2 in the extension direction of the strip-shaped vertical rail portion 43-1 is fixedly connected with the lower end of the strip-shaped vertical rail portion 43-1, and the end with a smaller width of each tail portion 43-2 in the extension direction of the strip-shaped vertical rail portion 43-1 extends outwardly relative to the strip-shaped vertical rail portion 43-1; the second slot bottom rail 43 is parallel to the first slot bottom rail 42 and a first spacing is arranged between the two.

[0069] As shown in FIGS. 8 and 9, the third groove bottom rail 44 comprises a third rail body part 44-1 and a horn part 44-2 fixedly arranged at the corner where the upper end surface of the third rail body part 44-1 intersects with the inner side surface thereof, the cross sections of the third rail body part 44-1 and the horn part 44-2 are rectangular, and the cross section of the third rail body part 44-1 and the cross section of the horn part 44-2 are mutually overlapped in a horn shape, the upper end surface of the horn part 44-2 is higher than the upper end surface of the third rail body part 44-1, the lower end surface of the horn part 44-2 is lower than the upper end surface of the third rail body part 44-1, the inner side surface of the horn part 44-2 is located inside the inner side surface of the third rail body part 44-1, the outer side surface of the horn part 44-2 is located outside the inner side surface of the third rail body part 44-1, and the outer side surface of the horn part 44-2 is located inside the outer side surface of the third rail body part 44-1. The second groove wall part 45 is a strip-shaped plate body.

[0070] As shown in FIG. 9, the outer side surface of the first groove wall body part 41-1 of the first groove wall part 41 is attached to and fixedly connected with the inner side surface of the first base plate 11, and the intersection of the upper surface and the inner side surface of the first base plate 11 is an inner upper corner thereof, the inner upper corner of the first base plate 11 is clamped with the stepped part 41-3 of the first groove wall body part 41-1, and the first base plate 11 limits the first groove wall part 41; the upper surfaces of all the tail parts 43-2 of the second groove bottom rail 43 are attached to and fixedly connected with the lower bottom surface of the second base plate 15; the lower bottom surface of the third rail body part 44-1 of the third groove bottom rail 44 is attached to and fixedly connected with the upper surface of the inner side sub-plate part 15-1 of the second base plate 15, and the outer side surface of the third rail body part 44-1 is attached to the inner side surface 15-4 of the middle sub-plate part 15-2, and the middle sub-plate part 15-2 limits the third rail body part 44-1; the third groove bottom rail 44 is parallel to the second groove bottom rail 43, and a second spacing is arranged between the third groove bottom rail 44 and the second groove bottom rail 43; the lower bottom surface of the second groove wall part 45 is attached to and fixedly connected with the upper surface of the middle sub-plate part 15-2, and the lower bottom surface of the second groove wall part 45 is higher than the upper surface of the third rail body part 44-1, and the inner side surface of the second groove wall part 45 is attached to the outer side surface of the horn part 44-2.

[0071] The first slot wall member 41, the first slot bottom rail 42, the second slot bottom rail 43, the third slot bottom rail 44, and the second slot wall member 45 are parallel to each other, upper end faces of the first vertical wall 42-2, the second vertical wall 42-3, the strip-shaped vertical rail portion 43-1, and the horn portion 44-2 are located in the same horizontal plane (i.e., the upper end faces of the four are flush) and the horizontal plane is the reference plane; the upper end face of the first slot wall main portion 41-1 of the first slot wall member 41 is higher than the reference plane, and the upper surface of the second slot wall member 45 is higher than the reference plane; the first slot wall member 41, the first slot bottom rail 42, the second slot bottom rail 43, the third slot bottom rail 44, and the second slot wall member 45 form a conveying chute (hereinafter referred to as "conveying chute" for short) capable of conveying the lead frame, and the width of the conveying chute matches the width of the single-piece lead frame to be conveyed, the first slot bottom rail 42, the second slot bottom rail 43, and the third slot bottom rail 44 are used to support the lead frame, and the first slot wall member 41 and the second slot wall member 45 are used to shield and limit the edges of the lead frame. In a preferred embodiment of the present embodiment, the lengths of the first slot wall member 41, the first slot bottom rail 42, the second slot bottom rail 43, the third slot bottom rail 44, and the second slot wall member 45 all match the length of the single-piece lead frame.

[0072] In a preferred embodiment of the present embodiment, a first chamfer is provided at the intersection between the upper surface of the first slot wall main portion 41-1 of the first slot wall member 41 and the inner side surface thereof, and a second chamfer is provided at the intersection between the upper surface of the second slot wall member 45 and the inner side surface thereof, the first chamfer and the second chamfer facilitate the placement of the lead frame into the conveying chute.

[0073] It should be noted that in the above description of the carrying unit 10 and the chute assembly 40 of the present embodiment, the definitions of "inner", "outer", "inner side", and "outer side" are all based on the center line of the conveying chute formed by the chute assembly 40, and the closer to the center line, the closer to the inner side, and vice versa.

[0074] The needle poking assembly 50 is fixedly arranged on the first step-shaped member 33. The needle poking assembly 50 includes a needle poking 53, which is arranged above the conveying chute in the vertical direction, and the needle tip of the needle poking 53 is downward.

[0075] In a preferred embodiment of the present embodiment, as shown in FIGS. 10, 11, and 12, the above-described feeding device further includes a second driving unit 60 and a linear moving assembly 70; the second driving unit 60 is fixedly connected with the slide rail assembly 30; and the linear moving assembly 70 is movably connected with the second driving unit 60.

[0076] As shown in FIGS. 12, 13, 14 and 15, the second driving unit 60 comprises a mounting base 61, a second motor 62, a second mounting plate 63, an eccentric wheel 64, a conducting roller 65, and a driving arm 66.

[0077] The mounting base 61 is a plate body in an overall L shape; the mounting base 61 comprises a bottom plate 61-1, an extension plate 61-2, and a convex beam 61-3, one end of the bottom plate 61-1 is fixedly connected with one end of the extension plate 61-2 in an L shape, and the convex beam 61-3 is fixedly arranged on the back of the bottom plate 61-1. The mounting base 61 is fixedly connected with the first step-shaped piece 33 of the slide rail assembly 30, specifically, one side surface of the convex beam 61-3 of the mounting base 61 is mutually adhered with the side surface of the first step-shaped piece 33 of the slide rail assembly 30 which is provided with the second wing plate 33-3, and the two are fixedly connected with each other.

[0078] The second motor 62 is fixedly arranged on the front surface of the bottom plate 61-1; the second mounting plate 63 is fixedly mounted on one end of the second motor 62, and one end of the second mounting plate 63 is fixedly connected with the side surface of the mounting base 61. One end of the output shaft of the second motor 62 passes through the through hole 63-1 on the second mounting plate 63, and the eccentric wheel 64 is fixedly sleeved on the one end of the output shaft of the second motor 62 which passes through the second mounting plate 63, so that the output shaft of the second motor 62 can drive the eccentric wheel 64 to rotate. The central shaft of the conducting roller 65 is fixedly arranged on one end of the driving arm 66, and the conducting roller 65 can rotate around the central shaft, and the surface of the conducting roller 65 is mutually adhered with the outer circumferential surface of the eccentric wheel 64.

[0079] In a further preferred embodiment of the present embodiment, the second driving unit 60 further comprises a first pin 67, a first spring 68, and a second pin 69; one end of the first pin 67 is fixedly arranged on the driving arm 66, and one end of the second pin 69 is fixedly arranged on the second mounting plate 63; the upper end of the first spring 68 is elastically connected with the free end of the first pin 67, and the lower end of the first spring 68 is elastically connected with the free end of the second pin 67, and the elastic force exerted on the conducting roller 65 by the first spring 68 via the first pin 67 and the driving arm 66 makes the surface of the conducting roller 65 and the outer circumferential surface of the eccentric wheel 64 be able to be mutually closely adhered. In the present embodiment, the middle position of the driving arm 66 is provided with an accommodating groove 66-1, one end of the first pin 67 is fixedly arranged in the accommodating groove 66-1 of the driving arm 66, and the accommodating groove 66-1 is used to provide accommodation space for the first pin 67 and the first spring 68.

[0080] As shown in FIG. 12 and FIG. 16, the linear moving assembly 70 comprises a second slider 71 and a first cross roller guide assembly 72. The second slider 71 has a U-shaped cross section. The first cross roller guide assembly 72 comprises at least two branch guide rails, is located in the second slider 71 and extends along a vertical direction, and a first branch guide rail 72-1 of the first cross roller guide assembly 72 is fixedly installed on an inner bottom surface of the second slider 71, and a second branch guide rail 72-2 of the first cross roller guide assembly 72 is fixedly installed on a side surface of the extension plate 61-2 of the mounting base 61 which faces away from the bottom plate 61-1, so that the second slider 71 can linearly slide along the vertical direction relative to the extension plate 61-2 of the mounting base 61. One end of the driving arm 66 which is not provided with the conducting roller 65 is fixedly connected to an outer side surface of one extension arm of the second slider 71.

[0081] When the output shaft of the second motor 62 drives the eccentric wheel 64 to reciprocate, the eccentric wheel 64 can exert a force on the second slider 71 via the conducting roller 65 and the driving arm 66, so that the second slider 71 can periodically linearly move along the vertical direction (i.e., the first cross roller guide assembly 72). Specifically, during the process that the output shaft of the second motor 62 drives the eccentric wheel 64 to rotate, when the outer circumferential surface at the position of minimum radius of the eccentric wheel 64 is in close contact with the surface of the conducting roller 65, the position of the conducting roller 65 along the vertical direction is the lowest, and the position of the second slider 71 along the vertical direction is also the lowest accordingly; when the radius of the eccentric wheel 64 gradually increases and the outer circumferential surface at the position of larger radius is in close contact with the surface of the conducting roller 65, the force exerted by the eccentric wheel 64 on the second slider 71 via the conducting roller 65 and the driving arm 66 makes the second slider 71 gradually rise along the vertical direction; when the outer circumferential surface at the position of maximum radius of the eccentric wheel 64 is in close contact with the surface of the conducting roller 65, the position of the conducting roller 65 along the vertical direction is the highest, and the position of the second slider 71 along the vertical direction is also the highest accordingly. Next, the output shaft of the second motor 62 drives the eccentric wheel 64 to reversely rotate to the initial position, the position of the conducting roller 65 linearly moves along the vertical direction from the highest position to the lowest position, and the position of the second slider 71 also linearly moves along the vertical direction from the highest position to the lowest position accordingly, so as to realize the periodic linear movement of the second slider 71 along the vertical direction (i.e., the first cross roller guide assembly 72).

[0082] In this preferred embodiment of the present application, as shown in FIGS. 12 and 18, the needle dialing assembly 50 comprises a spoon 51, a handle 52, and a needle 53. The spoon 51 comprises a spoon head 51-1 and a spoon handle 51-2; the handle 52 is in the shape of an elongated cuboid; the spoon handle 51-2 is fixedly connected to the outer bottom surface of the second slider 71 (not shown in the figures), the handle 52 is fixedly arranged on the spoon head 51-1 of the spoon 51, and the needle 53 is fixedly arranged on one end of the handle 52, the needle 53 is arranged above the needle groove 42-4 of the first groove bottom rail 42 in the vertical direction, and the needle tip of the needle 53 faces downward. In the present application, the spoon head 51-1 is provided with a handle recess 51-3, and the handle 52 is fixedly arranged in the handle recess 51-3 of the spoon head 51-1.

[0083] In another preferred embodiment of the present application, as shown in FIGS. 12 and 17, the linear moving assembly 70 further comprises a third slider 73, a second cross roller guide assembly 74, a hook 75, a first sensor mounting bracket 76, a nose 77, a second spring 78, and a third pin 79.

[0084] The third slider 73 is in the shape of a U. The second cross roller guide assembly 74 comprises at least two branch rails, is located in the third slider 73 and extends in the horizontal direction, and the first branch rail 74-1 of the second cross roller guide assembly 74 is fixedly mounted on the inner bottom surface of the third slider 73, and the second branch rail 74-2 of the second cross roller guide assembly 74 is fixedly mounted on the outer bottom surface of the second slider 71, so that the third slider 73 can linearly slide relative to the second slider 71 in the horizontal direction.

[0085] The first sensor mounting bracket 76 is in the shape of a U; the first sensor mounting bracket 76 is fixedly arranged on the outer side surface of the second slider 71, and the first sensor mounting bracket 76 and the driving arm 66 are located on the same side surface of the second slider 71; the hook handle of the hook 75 is fixedly connected to the outer bottom surface of the third slider 73, the hook 75 extends in the horizontal direction, and the hook tip of the hook 75 is located between the two extension arms of the first sensor mounting bracket 76, and the two extension arms of the first sensor mounting bracket 76 are respectively used to mount, for example, a first light emitting sensor and a first light receiving sensor (both not shown in the figures).

[0086] In this preferred embodiment of the present application, the spoon-shaped member 51 comprises a spoon head 51-1 and a spoon handle 51-2; the handle member 52 is in the shape of an elongated cuboid; the spoon handle 51-2 of the spoon-shaped member 51 is fixedly connected to the outer bottom surface of the third slider 73, the handle member 52 is fixedly arranged in the spoon head 51-1 of the spoon-shaped member 51, and the needle 53 is fixedly arranged at one end of the handle member 52 and extends in the vertical direction with the needle tip pointing downward. In this embodiment, the spoon head 51-1 is provided with a handle recess 51-3, and the handle member 52 is fixedly arranged in the handle recess 51-3 of the spoon head 51-1.

[0087] One end of the nose-shaped member 77 is fixedly arranged on the outer side surface of one extension arm of the second slider 71, and the extension arm of the second slider 71 is away from the driving arm 66; one end of the third pin 79 is fixedly arranged on the outer bottom surface of the third slider 73; the second spring 78 extends in the horizontal direction, one end of the second spring 78 is elastically connected to the free end of the third pin 79, and the other end of the second spring 78 is elastically connected to the free end of the nose-shaped member 77. The elastic force exerted by the second spring 78 on the third slider 73 via the third pin 79 causes the third slider 73 to move towards the nose-shaped member 77, and the third slider 73 in turn drives the spoon-shaped member 51, the handle member 52, and the needle 53 to move towards the nose-shaped member 77.

[0088] In general, the third slider 73 of the linear movement assembly 70 is stationary relative to the second slider 71. During use, when the lead frame encounters an obstacle and is blocked during forward transmission along the transmission chute (here, “forward” and “backward” are shown in FIG. 5), and the reverse resistance acting on the handle member 52 of the needle assembly 50 is greater than the elastic force of the second spring 78, the reverse resistance will cause the handle member 52 to move linearly in the horizontal direction backward (here, “forward” and “backward” are shown in FIG. 5), and the handle member 52 will drive the third slider 73 to move linearly in the horizontal direction backward via the spoon-shaped member 51, and the third slider 73 in turn drives the hook-shaped member 75 to move linearly in the horizontal direction backward, so that the hook tip of the hook-shaped member 75 is separated from the two extension arms of the first sensor mounting bracket 76. In this case, the separation of the hook tip of the hook-shaped member 75 from the two extension arms of the first sensor mounting bracket 76 can be detected by, for example, the first light emitting sensor and the first light receiving sensor, and it can be known that the transmission of the lead frame along the transmission chute is blocked and stopped, thereby playing a protective role.

[0089] As shown in FIG. 19, the present application also provides a feeding method for feeding a lead frame, which uses the feeding device described above, and the feeding method comprises the following steps:

[0090] S1: Place the lead frame to be conveyed into the conveying chute (the lead frame placed in the conveying chute is not shown in the figure), the lead frame is located between the first groove wall member 41 and the second groove wall member 45, and the lead frame is located on the first groove bottom rail 42, the second groove bottom rail 43 and the third groove bottom rail 44 of the chute assembly 40;

[0091] S2: The second motor 62 is started, the second motor 62 drives the second sliding block 71 of the linear moving assembly 70 to move linearly along the vertical direction downward via the eccentric wheel 64, the transmission roller 65 and the driving arm 66, the second sliding block 71 in turn drives the needle 53 of the needle shifting assembly 50 to move linearly along the vertical direction downward via the third sliding block 73 and the second cross ball guide rail assembly 74, the downward movement of the needle 53 along the vertical direction makes the needle tip of the needle 53 penetrate into the needle groove 42-4 of the first groove bottom rail 42 and into the through hole of the side edge of the lead frame, and then the second motor 62 is stopped;

[0092] S3: The first motor 21 is started, the first motor 21 drives the annular belt 27 to rotate, the annular belt 27 in turn drives the first stepped member 33 to move linearly along the horizontal direction (i.e. the first linear sliding rail 31) forward via the L-shaped member 34 and the cover plate 35, the first stepped member 33 in turn drives the second sliding block 71 to move linearly along the horizontal direction forward via the mounting seat 61 and the first cross ball guide rail assembly 72, the second sliding block 71 in turn drives the needle 53 to move linearly along the horizontal direction forward via the third sliding block 73 and the second cross ball guide rail assembly 74, the needle 53 in turn drives the lead frame to move linearly along the conveying chute forward by a certain distance, and then the first motor 21 is stopped;

[0093] S4: The second motor 62 is started, the second motor 62 drives the second sliding block 71 of the linear moving assembly 70 to move linearly along the vertical direction upward via the eccentric wheel 64, the transmission roller 65 and the driving arm 66, the second sliding block 71 in turn drives the needle 53 to move linearly along the vertical direction upward via the third sliding block 73 and the second cross ball guide rail assembly 74, so that the needle tip of the needle 53 penetrates out of the needle groove 42-4 of the first groove bottom rail 42 and the through hole of the edge of the lead frame, and the needle 53 is reset, and then the second motor 62 is stopped;

[0094] S5: The first motor 21 is started, the first motor 21 drives the annular belt 27 to rotate, the annular belt 27 in turn drives the first stepped member 33 to move linearly along the horizontal direction (i.e. the first linear sliding rail 31) backward via the L-shaped member 34 and the cover plate 35, the first stepped member 33 in turn drives the second sliding block 71 to move linearly along the horizontal direction backward via the mounting seat 61 and the first cross ball guide rail assembly 72, the second sliding block 71 in turn drives the needle 53 to move linearly along the horizontal direction backward by a certain distance via the third sliding block 73 and the second cross ball guide rail assembly 74, and then the first motor 21 is stopped.

[0095] The steps S2-S5 are repeated until the lead frame leaves the conveying chute, and the feeding is completed.

[0096] As shown in FIG. 20, the present embodiment further provides another feeding method for conveying the lead frame, which employs the feeding device described above, and the feeding method comprises the following steps:

[0097] S1: placing the lead frame to be conveyed into the conveying chute (not shown in the figure), the lead frame being located between the first groove wall member 41 and the second groove wall member 45, and the lead frame being located above the first groove bottom strip rail 42, the second groove bottom strip rail 43 and the third groove bottom strip rail 44 of the chute assembly 40;

[0098] S2: the second motor 62 is started, the second motor 62 drives the second sliding block 71 of the linear moving assembly 70 to move linearly along the vertical direction downward via the eccentric wheel 64, the transmission roller 65 and the driving arm 66, the second sliding block 71 in turn drives the needle 53 of the needle poking assembly 50 to move linearly along the vertical direction downward via the third sliding block 73 and the second cross ball guide rail assembly 74, so that the needle tip of the needle 53 is below the lower surface of the lead frame and close to the edge of the rear end of the lead frame, at this time, the needle tip of the needle 53 does not directly contact the edge of the rear end of the lead frame but there is a gap between them, and then the second motor 62 is stopped.

[0099] S3: the first motor 21 is started, the first motor 21 drives the annular belt 27 to rotate, the annular belt 27 in turn drives the first stepped member 33 to move linearly along the horizontal direction (i.e. the first linear sliding rail 31) forward via the L-shaped member 34 and the cover plate 35, the first stepped member 33 in turn drives the second sliding block 71 to move linearly along the horizontal direction forward via the mounting seat 61 and the first cross ball guide rail assembly 72, the second sliding block 71 in turn drives the needle 53 to move linearly along the horizontal direction forward via the third sliding block 73 and the second cross ball guide rail assembly 74, the needle 53 directly contacts the rear end of the lead frame and pushes the lead frame to move linearly along the conveying chute forward until the lead frame leaves the conveying chute, then the first motor 21 is stopped, and the feeding is completed.

[0100] In another preferred embodiment of the present embodiment, as shown in FIGS. 11 and 12, the conveying device further comprises a calibration unit 80, which comprises a marker wheel 81, a connecting member 82 and a second sensor mounting rack 83.

[0101] The marking wheel 81 is fixedly installed at one end of the output shaft of the second motor 62, away from the eccentric wheel 64, so that the output shaft of the second motor 62 can synchronously drive the eccentric wheel 64 and the marking wheel 81 to rotate; the second sensor mounting bracket 83 is in the shape of a whole U; one end of the connecting piece 82 is fixedly connected with one side surface of the second motor 62, and the other end of the connecting piece 82 is fixedly connected with the second sensor mounting bracket 83; the outer edge of the marking wheel 81 is located between the two extending arms of the second sensor mounting bracket 83; the two extending arms of the second sensor mounting bracket 83 are respectively used for mounting, for example, a second light emitting sensor and a second light receiving sensor (both not shown in the figure). The edge of the marking wheel 81 is provided with and only one notch 81-1.

[0102] When the second motor 62 and the eccentric wheel 64 are at the starting position, the notch 81-1 of the marking wheel 81 is located between the two extending arms of the second sensor mounting bracket 83, and the second light receiving sensor can receive the light signal emitted from the second light emitting sensor; when the second motor 62 and the eccentric wheel 64 are at the remaining positions, the notch 81-1 of the marking wheel 81 deviates from between the two extending arms of the second sensor mounting bracket 83, and the light signal emitted by the second light emitting sensor is blocked by the eccentric wheel 64, so that the second light receiving sensor cannot receive the light signal emitted from the second light emitting sensor. Therefore, the notch 81-1 of the marking wheel 81 can mark the starting position of the second motor 62 and the eccentric wheel 64, and further mark the starting position of the transmission action of the needle 53. After one transmission action of the needle 53 to the lead frame, the output shaft of the second motor 62 will reversely rotate and drive the eccentric wheel 64 to return to the starting position (i.e. the eccentric wheel 64 is reset), and in this process, the second motor 62 also drives the marking wheel 81 to synchronously return to the state that the notch 81-1 is located between the two extending arms of the second sensor mounting bracket 83 (i.e. the marking wheel 81 is reset).

[0103] Obviously, the above embodiments of the present application are merely exemplary and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments cannot be exhausted. Any obvious changes or variations derived from the technical solutions of the present application are still within the protection scope of the present application.

Claims

1. A feeding device for conveying lead frames, characterized in that, The feeding device includes a first drive unit (20); the first drive unit (20) includes a first motor (21), a first drive wheel (22), a first transmission wheel (23), a second transmission wheel (24), a first steering roller (25), a second steering roller (26), and an annular belt (27); The inner side of the annular belt (27) is provided with teeth, and the sides of the first drive wheel (22), the first transmission wheel (23), and the second transmission wheel (24) are also provided with teeth; the first drive wheel (22) is fixedly connected to the output shaft of the first motor (21), so that the first motor (21) can drive the first drive wheel (22) to rotate; the inner side of the annular belt (27) surrounds part of the sides of the first drive wheel (22), the first transmission wheel (23), and the second transmission wheel (24), and the teeth provided on the inner side of the annular belt (27) can interact with the teeth provided on the sides of the first drive wheel (22), the first transmission wheel (23), and the second transmission wheel (24). 4) The teeth on the side of the belt mesh with each other, so that the first drive wheel (22) can drive the annular belt (27) to rotate, and the annular belt (27) can then drive the first transmission wheel (23) and the second transmission wheel (24) to rotate; the outer side of the annular belt (27) surrounds part of the side of the first steering roller (25) and the second steering roller (26), so that the annular belt (27) can change direction at the first steering roller (25) and the second steering roller (26) respectively; the first drive wheel (22), the first transmission wheel (23), the second transmission wheel (24), the first steering roller (25), and the second steering roller (26) tighten the annular belt (27).

2. The feeding device for conveying lead frames according to claim 1, characterized in that, The feeding device further includes a support unit (10); the support unit (10) includes a first substrate (11), a first column (12), a second column (13), and a second substrate (15); the first driving unit (20) further includes a first mounting plate (28); The first substrate (11) and the second substrate (15) are both rectangular plates, and the first substrate (11) and the second substrate (15) are fixed relative to the ground; the first column (12) and the second column (13) are respectively fixed at both ends of the front side of the first substrate (11), and the first column (12) and the second column (13) are along the outer edge of the front side of the first substrate (11). The first motor (21) is disposed below the first base plate (11), and the first motor (21) is fixedly connected to the first base plate (11) by means of the first mounting plate (28); the central axis of the first transmission wheel (23) is fixedly disposed on the first column (12), and the first transmission wheel (23) can rotate around its central axis; the central axis of the second transmission wheel (24) is fixedly disposed on the second column (13), and the second transmission wheel (24) can rotate around its central axis; the central axes of the first steering roller (25) and the second steering roller (26) are both fixedly disposed on the outer side of the first base plate (11), and the first steering roller (25) and the second steering roller (26) can both rotate around their respective central axes.

3. The feeding device for conveying lead frames according to claim 2, characterized in that, The feeding device also includes a slide rail assembly (30); the slide rail assembly (30) includes a first linear slide rail (31), a first slider (32), a first stepped component (33), an L-shaped component (34), and a cover plate (35); A U-shaped groove (14) is provided on the front side of the first substrate (11) near its inner edge; the first linear slide rail (31) is in the shape of a long and narrow cuboid and is fixedly disposed in the U-shaped groove (14) of the first substrate (11); a U-shaped opening is provided on the back side of the first slider (32) and the first linear slide rail (31) is engaged in the U-shaped opening of the first slider (32) so that the first slider (32) can slide along the first linear slide rail (31); The first stepped component (33) includes a body part (33-1), a first wing plate (33-2), and a second wing plate (33-3). The body part (33-1) is rectangular. The first wing plate (33-2) and the second wing plate (33-3) are respectively fixedly disposed on the two sides of the body part (33-1). The front of the body part (33-1) is an upward step relative to the front of the first wing plate (33-2). The front of the body part (33-1) is an upward step relative to the front of the second wing plate (33-3). The back of the body part (33-1) and the back of the second wing plate (33-3) are located in the same plane. The back of the body part (33-1) is a downward step relative to the back of the first wing plate (33-2). The back of the first wing plate (33-2) of the first stepped member (33) is fixedly connected to the front of the first slider (32); the side of the second wing plate (33-3) of the first stepped member (33) away from the main body (33-1) is fixedly connected to the free end of the bottom arm of the L-shaped member (34); the extension arm of the L-shaped member (34) is fixedly connected to the cover plate (35), and a gap is formed between the front of the extension arm of the L-shaped member (34) and the back of the cover plate (35); the annular belt (27) is fixedly installed in the gap between the front of the extension arm of the L-shaped member (34) and the back of the cover plate (35), and the teeth on the inner side of the annular belt (27) mesh with the teeth on the front of the extension arm of the L-shaped member (34), so that the annular belt (27) can drive the L-shaped member (34) to move synchronously.

4. The feeding device for conveying lead frames according to claim 3, characterized in that, The feeding device further includes a chute assembly (40); the chute assembly (40) includes a first chute wall component (41), a first chute bottom rail (42), a second chute bottom rail (43), a third chute bottom rail (44), and a second chute wall component (45); The first groove wall component (41) includes a first groove wall main body (41-1) and a first flange (41-2). The first flange (41-2) is fixedly disposed at the lower end of the first groove wall main body (41-1) and protrudes inward relative to the first groove wall main body (41-1). The outer side of the first groove wall main body (41-1) is provided with a stepped portion (41-3). The first groove bottom rail (42) includes a first rail main body (42-1) and a first vertical rail. The first vertical wall (42-2) and the second vertical wall (42-3) are fixedly disposed on the upper end face of the first rail main body (42-1). The first vertical wall (42-2) and the second vertical wall (42-3) are parallel to each other, and the first vertical wall (42-2), the second vertical wall (42-3) and the upper end face of the first rail main body (42-1) form a U-shaped needle groove (42-4). The outer side of the first rail body (42-1) of the first groove bottom rail (42) is in contact with the inner side of the first groove wall body (41-1) of the first groove wall member (41) and the two are fixedly connected. The lower end of the first rail body (42-1) of the first groove bottom rail (42) abuts against the upper surface of the first flange (41-2) of the first groove wall member (41). The first flange (41-2) of the first groove wall member (41) provides support and limit for the first groove bottom rail (42). The second bottom rail (43) includes a strip-shaped vertical rail section (43-1) and at least two tail sections (43-2). All tail sections (43-2) are fixedly disposed at the lower end of the strip-shaped vertical rail section (43-1). All tail sections (43-2) extend outward relative to the strip-shaped vertical rail section (43-1) and are perpendicular to the strip-shaped vertical rail section (43-1). The second bottom rail (43) is parallel to the first bottom rail (42) and a first gap is provided between them. The third bottom rail (44) includes a main body (44-1) and a corner portion (44-2). The corner portion (44-2) is fixedly located at the corner where the upper end face of the main body (44-1) intersects with its inner side. Both the main body (44-1) and the corner portion (44-2) have rectangular cross-sections, and the cross-sections of the main body (44-1) and the corner portion (44-2) overlap to form a corner shape. The upper end face of the corner portion (44-2) is higher than that of the main body (44-1). The upper end face of the body part (44-1) and the lower end face of the horn part (44-2) are lower than the upper end face of the third rail body part (44-1). The inner side of the horn part (44-2) is located inside the inner side of the inner side of the third rail body part (44-1). The outer side of the horn part (44-2) is located outside the inner side of the third rail body part (44-1). The outer side of the horn part (44-2) is located inside the outer side of the outer side of the third rail body part (44-1). The second groove wall member (45) is a strip-shaped plate. The outer side of the first groove wall main body (41-1) of the first groove wall component (41) is attached to the inner side of the first substrate (11) and the two are fixedly connected. The intersection of the upper surface and the inner side of the first substrate (11) is its inner upper corner. The inner upper corner of the first substrate (11) is engaged with the step portion (41-3) of the first groove wall main body (41-1). The first substrate (11) plays a limiting role for the first groove wall component (41). The upper surfaces of all the tail portions (43-2) of the second groove bottom rail (43) are attached to the lower bottom surface of the second substrate (15) and fixedly connected. The lower bottom surface of the third rail main body (44-1) of the third groove bottom rail (44) is attached to the inner side subplate portion (1) of the second substrate (15). The upper surfaces of the three rails (44-1) are attached to each other and fixedly connected. The outer side of the third rail body (44-1) is attached to the inner side (15-4) of the middle sub-plate (15-2). The middle sub-plate (15-2) limits the third rail body (44-1). The third groove bottom rail (44) and the second groove bottom rail (43) are parallel to each other and a second gap is provided between them. The lower bottom surface of the second groove wall member (45) is attached to the upper surface of the middle sub-plate (15-2) and fixedly connected. The lower bottom surface of the second groove wall member (45) is higher than the upper surface of the third rail body (44-1). The inner side of the second groove wall member (45) is attached to the outer side of the corner part (44-2). The first groove wall component (41), the first groove bottom rail (42), the second groove bottom rail (43), the third groove bottom rail (44), and the second groove wall component (45) are parallel to each other. The upper surfaces of the first vertical wall (42-2), the second vertical wall (42-3), the strip vertical rail part (43-1), and the corner part (44-2) are located in the same horizontal plane, and this horizontal plane is the reference plane. The upper surface of the first groove wall main body part (41-1) of the first groove wall component (41) is higher than the reference plane, and the upper surface of the second groove wall component (45) is higher than the reference plane. A conveying chute is formed by the first groove wall member (41), the first groove bottom rail (42), the second groove bottom rail (43), the third groove bottom rail (44), and the second groove wall member (45), which can allow the lead frame to pass through. The width of the conveying chute matches the width of the single lead frame to be conveyed. The first groove bottom rail (42), the second groove bottom rail (43), and the third groove bottom rail (44) are used to support the lead frame. The first groove wall member (41) and the second groove wall member (45) are used to shield and limit the edge of the lead frame.

5. The feeding device for conveying lead frames according to claim 4, characterized in that, The feeding device also includes a needle-shifting assembly (50); the needle-shifting assembly (50) is fixedly mounted on the first stepped member (33); the needle-shifting assembly (50) includes a needle (53), which is vertically positioned above the conveying chute, with the tip of the needle (53) pointing downwards.

6. The feeding device for conveying lead frames according to claim 4, characterized in that, The feeding device also includes a second drive unit (60); the second drive unit (60) is fixedly connected to the slide rail assembly (30); The second drive unit (60) includes a mounting base (61), a second motor (62), a second mounting plate (63), an eccentric wheel (64), a transmission roller (65), and a drive arm (66); The mounting base (61) is an L-shaped plate. The mounting base (61) includes a base plate (61-1), an extension plate (61-2), and a protruding beam (61-3). One end of the base plate (61-1) is fixedly connected to one end of the extension plate (61-2) to form an L-shape. The protruding beam (61-3) is fixedly installed on the back of the base plate (61-1). The mounting base (61) is fixedly connected to the first stepped member (33) of the slide rail assembly (30). One side of the protruding beam (61-3) of the mounting base (61) is in contact with the side of the first stepped member (33) of the slide rail assembly (30) which is provided with the second wing plate (33-3), and the two are fixedly connected to each other. The second motor (62) is fixedly mounted on the front of the base plate (61-1); the second mounting plate (63) is fixedly mounted on one end of the second motor (62), and one end of the second mounting plate (63) is fixedly connected to the side of the mounting base (61); one end of the output shaft of the second motor (62) passes through the through hole (63-1) on the second mounting plate (63), and the eccentric wheel (64) is fixedly sleeved on the end of the output shaft of the second motor (62) that passes through the second mounting plate (63), so that the output shaft of the second motor (62) can drive the eccentric wheel (64) to rotate; the central shaft of the guide roller (65) is fixedly mounted on one end of the drive arm (66), and the guide roller (65) can rotate around its central shaft, and the surface of the guide roller (65) is in contact with the outer circumferential surface of the eccentric wheel (64).

7. The feeding device for conveying lead frames according to claim 6, characterized in that, The second drive unit (60) also includes a first pin (67), a first spring (68), and a second pin (69); one end of the first pin (67) is fixedly mounted on the drive arm (66), and one end of the second pin (69) is fixedly mounted on the second mounting plate (63); the upper end of the first spring (68) is elastically connected to the free end of the first pin (67), and the lower end of the first spring (68) is elastically connected to the free end of the second pin (67). The first spring (68) is connected via a first... The elastic force applied by the pin (67) and the drive arm (66) to the guide roller (65) enables the surface of the guide roller (65) to fit tightly against the outer circumferential surface of the eccentric wheel (64); a receiving groove (66-1) is provided in the middle position of the drive arm (66), and one end of the first pin (67) is fixedly set in the receiving groove (66-1) of the drive arm (66). The receiving groove (66-1) is used to provide receiving space for the first pin (67) and the first spring (68).

8. The feeding device for conveying lead frames according to claim 6 or 7, characterized in that, The feeding device further includes a linear moving component (70); the linear moving component (70) is movably connected to the second drive unit (60); The linear movement assembly (70) includes a second slider (71) and a first cross ball guide assembly (72); the second slider (71) has a U-shaped cross section; the first cross ball guide assembly (72) includes at least two support rails, the first cross ball guide assembly (72) is located inside the second slider (71) and extends vertically, and the first support rail (72-1) of the first cross ball guide assembly (72) is fixedly installed on the inner bottom surface of the second slider (71), and the second support rail (72-2) of the first cross ball guide assembly (72) is fixedly installed on the side of the extension plate (61-2) of the mounting base (61) facing away from the bottom plate (61-1), so that the second slider (71) can slide linearly relative to the extension plate (61-2) of the mounting base (61) in the vertical direction; one end of the drive arm (66) without the transmission roller (65) is fixedly connected to the outer side of one extension arm of the second slider (71); When the output shaft of the second motor (62) drives the eccentric wheel (64) to rotate back and forth, the eccentric wheel (64) can apply force to the second slider (71) through the transmission roller (65) and the drive arm (66), so that the second slider (71) makes periodic linear movement along the vertical direction.

9. The feeding device for conveying lead frames according to claim 8, characterized in that, The feeding device also includes a needle-pulling assembly (50); the needle-pulling assembly (50) includes a spoon-shaped part (51), a handle part (52) and a needle (53); the spoon-shaped part (51) includes a spoon head (51-1) and a spoon handle part (51-2); the handle part (52) is generally in the shape of a slender cuboid; the spoon handle part (51-2) of the spoon-shaped part (51) is fixedly connected to the outer bottom surface of the second slider (71), the handle part (52) is fixedly disposed on the spoon head (51-1) of the spoon-shaped part (51), the needle (53) is fixedly disposed on one end of the handle part (52), the needle (53) is disposed vertically above the conveying chute, and the needle tip of the needle (53) points downward.

10. The feeding device for conveying lead frames according to claim 8, characterized in that, The linear motion assembly (70) also includes a third slider (73) and a second cross ball guide assembly (74); The third slider (73) has a U-shaped cross section; the second cross ball guide assembly (74) includes at least two support rails. The second cross ball guide assembly (74) is located inside the third slider (73) and extends in the horizontal direction. The first support rail (74-1) of the second cross ball guide assembly (74) is fixedly installed on the inner bottom surface of the third slider (73), and the second support rail (74-2) of the second cross ball guide assembly (74) is fixedly installed on the outer bottom surface of the second slider (71), so that the third slider (73) can slide linearly relative to the second slider (71) in the horizontal direction.

11. The feeding device for conveying lead frames according to claim 10, characterized in that, The feeding device also includes a needle-pulling assembly (50); the needle-pulling assembly (50) includes a spoon-shaped part (51), a handle part (52) and a needle (53); the spoon-shaped part (51) includes a spoon head (51-1) and a spoon handle part (51-2); the handle part (52) is generally in the shape of a slender cuboid; the spoon handle part (51-2) of the spoon-shaped part (51) is fixedly connected to the outer bottom surface of the third slider (73), the spoon head (51-1) of the spoon-shaped part (51) is provided with a handle groove (51-3), and the handle part (52) is fixedly disposed in the handle groove (51-3) of the spoon head (51-1); the needle (53) is fixedly disposed at one end of the handle part (52), the needle (53) is disposed vertically above the conveying chute, and the tip of the needle (53) points downward.

12. The feeding device for conveying lead frames according to claim 10 or 11, characterized in that, The linear motion assembly (70) also includes a hook-shaped part (75), a first sensor mounting bracket (76), a nose-shaped part (77), a second spring (78), and a third pin (79); The first sensor mounting bracket (76) is U-shaped in general; the first sensor mounting bracket (76) is fixedly mounted on the outer side of the second slider (71), and the first sensor mounting bracket (76) and the drive arm (66) are located on the same side of the second slider (71); the hook handle of the hook-shaped member (75) is fixedly connected to the outer bottom surface of the third slider (73), the hook-shaped member (75) extends in the horizontal direction, and the hook tip of the hook-shaped member (75) is located between the two extension arms of the first sensor mounting bracket (76), and the two extension arms of the first sensor mounting bracket (76) are used to mount the first light emitting sensor and the first light receiving sensor, respectively; One end of the nose-shaped component (77) is fixedly disposed on the outer side of an extension arm of the second slider (71), and the extension arm of the second slider (71) is far away from the drive arm (66); one end of the third pin (79) is fixedly disposed on the outer bottom surface of the third slider (73); the second spring (78) extends in the horizontal direction, one end of the second spring (78) is elastically connected to the free end of the third pin (79), and the other end of the second spring (78) is elastically connected to the free end of the nose-shaped component (77). The elastic force applied by the second spring (78) to the third slider (73) via the third pin (79) causes the third slider (73) to move closer to the nose-shaped component (77), and the third slider (73) in turn drives the spoon-shaped component (51), the handle component (52), and the dial pin (53) to move closer to the nose-shaped component (77).

13. The feeding device for conveying lead frames according to claim 6 or 7, characterized in that, The transmission device further includes a calibration unit (80), which includes a marking wheel (81), a connector (82), and a second sensor mounting bracket (83); The marking wheel (81) is fixedly installed on one end of the output shaft of the second motor (62) opposite to the eccentric wheel (64), so that the output shaft of the second motor (62) can synchronously drive the eccentric wheel (64) and the marking wheel (81) to rotate; the second sensor mounting bracket (83) is U-shaped in general; one end of the connector (82) is fixedly connected to one side of the second motor (62), and the other end of the second sensor mounting bracket (83) is fixedly connected to the connector (82); the outer edge of the marking wheel (81) is located between the two extension arms of the second sensor mounting bracket (83); the two extension arms of the second sensor mounting bracket (83) are respectively used to install the second light emitting sensor and the second light receiving sensor; the edge of the marking wheel (81) is provided with one and only one notch (81-1); The starting position of the second motor (62) and the eccentric wheel (64) can be marked by the notch (81-1) of the marking wheel (81), thereby marking the starting position of the transmission action. When the second motor (62) and the eccentric wheel (64) are in the starting position, the notch (81-1) of the marking wheel (81) is located between the two extension arms of the second sensor mounting bracket (83), and the second light receiving sensor can receive the light signal emitted by the second light emitting sensor. When the second motor (62) and the eccentric wheel (64) are in other positions, the notch (81-1) of the marking wheel (81) is offset from the two extension arms of the second sensor mounting bracket (83), and the light signal emitted by the second light emitting sensor is blocked by the eccentric wheel (64), causing the second light receiving sensor to be unable to receive the light signal emitted by the second light emitting sensor. After one transmission action of the lead frame is completed, the output shaft of the second motor (62) will rotate in the opposite direction and drive the eccentric wheel (64) back to its starting position. During this process, the second motor (62) will also drive the marking wheel (81) to return synchronously to the notch (81-1) located between the two extension arms of the second sensor mounting bracket (83).

14. The feeding device for conveying lead frames according to claim 2, characterized in that, A U-shaped opening is provided on one side edge of the first substrate (11), and the upper end of the first mounting plate (28) is provided in the U-shaped opening of the first substrate (11), and the first mounting plate (28) is fixedly connected to the side of the first substrate (11); the end of the first motor (21) with an output shaft is fixedly connected to the first mounting plate (28), and the output shaft of the first motor (21) passes through the through hole provided on the first mounting plate (28), and the first substrate (11) and the first motor (21) are located on the same side of the first mounting plate (28).

15. The feeding device for conveying lead frames according to claim 4, characterized in that, The lengths of the first slot wall component (41), the first slot bottom rail (42), the second slot bottom rail (43), the third slot bottom rail (44), and the second slot wall component (45) are all matched with the length of the single lead frame.

16. The feeding device for conveying lead frames according to claim 4, characterized in that, The second groove bottom rail (43) includes two T-shaped tails (43-2), which are fixedly disposed at both ends of the strip-shaped vertical rail (43-1). The wider end of each tail (43-2) along the extension direction of the strip-shaped vertical rail (43-1) is fixedly connected to the lower end of the strip-shaped vertical rail (43-1), and the narrower end of each tail (43-2) along the extension direction of the strip-shaped vertical rail (43-1) extends outward relative to the strip-shaped vertical rail (43-1).

17. The feeding device for conveying lead frames according to claim 4, characterized in that, The first groove wall component (41) has a first chamfer at the intersection of its upper surface and inner side surface, and the second groove wall component (45) has a second chamfer at the intersection of its upper surface and inner side surface. The first and second chamfers facilitate the placement of the lead frame into the conveyor chute.

17. A feeding method for conveying a lead frame, the feeding method employing the feeding device according to claim 11 or 12, characterized in that the feeding method comprises the following steps: S1: Place the lead frame to be conveyed in the conveying chute. The lead frame is located between the first chute wall member (41) and the second chute wall member (45), and the lead frame is located on the first chute bottom rail (42), the second chute bottom rail (43) and the third chute bottom rail (44) of the chute assembly (40). S2: The second motor (62) is turned on. The second motor (62) drives the second slider (71) of the linear moving assembly (70) to move linearly downward in the vertical direction via the eccentric wheel (64), the guide roller (65), and the drive arm (66). The second slider (71) then drives the pin (53) of the pin-shifting assembly (50) to move linearly downward in the vertical direction via the third slider (73) and the second cross ball guide assembly (74). The pin (53) moves downward in the vertical direction so that its tip enters the pin-shifting groove (42-4) of the first groove bottom rail (42) and enters the through hole on one side edge of the lead frame. Then the second motor (62) is turned off. S3: The first motor (21) is turned on, and the first motor (21) drives the annular belt (27) to rotate. The annular belt (27) then drives the first stepped member (33) to move linearly forward in the horizontal direction via the L-shaped member (34) and the cover plate (35). The first stepped member (33) then drives the second slider (71) to move linearly forward in the horizontal direction via the mounting base (61) and the first cross ball guide assembly (72). The second slider (71) then drives the dial pin (53) to move linearly forward in the horizontal direction via the third slider (73) and the second cross ball guide assembly (74). The dial pin (53) then drives the lead frame to move linearly forward along the conveyor chute by a set distance. Then the first motor (21) is turned off. S4: The second motor (62) is turned on. The second motor (62) drives the second slider (71) of the linear moving assembly (70) to move linearly upward in the vertical direction via the eccentric wheel (64), the guide roller (65), and the drive arm (66). The second slider (71) then drives the pin (53) to move linearly upward in the vertical direction via the third slider (73) and the second cross ball guide assembly (74), so that the tip of the pin (53) passes through the pin groove (42-4) of the first groove bottom rail (42) and the through hole of the lead frame edge and the pin (53) is reset. Then the second motor (62) is turned off. S5: The first motor (21) is turned on, and the first motor (21) drives the annular belt (27) to rotate. The annular belt (27) then drives the first stepped member (33) to move linearly backward in the horizontal direction via the L-shaped member (34) and the cover plate (35). The first stepped member (33) then drives the second slider (71) to move linearly backward in the horizontal direction via the mounting base (61) and the first cross ball guide assembly (72). The second slider (71) then drives the dial pin (53) to move linearly backward in the horizontal direction by a set distance via the third slider (73) and the second cross ball guide assembly (74). Then the first motor (21) is turned off. Repeat steps S2 to S5 until the lead frame leaves the conveyor chute, and the feeding is completed.

18. A feeding method for conveying a lead frame, the feeding method employing the feeding device according to claim 11 or 12, characterized in that, The feeding method includes the following steps: S1: Place the lead frame to be conveyed in the conveying chute. The lead frame is located between the first chute wall member (41) and the second chute wall member (45), and the lead frame is located on the first chute bottom rail (42), the second chute bottom rail (43) and the third chute bottom rail (44) of the chute assembly (40). S2: The second motor (62) is turned on. The second motor (62) drives the second slider (71) of the linear moving assembly (70) to move linearly downward in the vertical direction via the eccentric wheel (64), the guide roller (65), and the drive arm (66). The second slider (71) then drives the pin (53) of the pin-shifting assembly (50) to move linearly downward in the vertical direction via the third slider (73) and the second cross ball guide assembly (74), so that the tip of the pin (53) is lower than the lower surface of the lead frame and close to the edge of the rear end of the lead frame. At this time, the tip of the pin (53) and the edge of the rear end of the lead frame do not directly contact each other, but there is a slit between them. Then the second motor (62) is turned off. S3: The first motor (21) is turned on, and the first motor (21) drives the annular belt (27) to rotate. The annular belt (27) then drives the first stepped member (33) to move linearly forward in the horizontal direction via the L-shaped member (34) and the cover plate (35). The first stepped member (33) then drives the second slider (71) to move linearly forward in the horizontal direction via the mounting base (61) and the first cross ball guide assembly (72). The second slider (71) then drives the dial pin (53) to move linearly forward in the horizontal direction via the third slider (73) and the second cross ball guide assembly (74). The dial pin (53) then directly contacts the rear end of the lead frame and pushes the lead frame to move linearly forward along the conveyor chute until the lead frame leaves the conveyor chute. Then the first motor (21) is turned off, and the feeding ends.

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