Lead frame pushing structure and pusher

Abstract

The invention discloses a lead frame pushing structure and a pusher, and relates to the technical field of semiconductor production, the lead frame pushing structure comprises a pushing head, a pushing arm and a signal piece, the pushing head is movably connected to the pushing arm along a first direction, the pushing arm is used for being connected with an output end of a driving device, and the signal piece is used for receiving the signal piece. The material pushing arm can be driven by the driving device to move in the first direction, the signal piece is arranged on the material pushing head and the material pushing arm and used for being in signal connection with external control equipment, and when the material pushing head has relative displacement relative to the material pushing arm, the signal piece is in signal connection with the external control equipment. And the signal piece can transmit an alarm signal to the external control equipment. The lead frame pushing structure is more accurate in detection of the jamming condition in the material pushing process.

Description

Technical Field

[0001] The invention relates to the technical field of semiconductor production, in particular to a lead frame pushing structure and a pusher. Background Art

[0002] The lead frame pushing structure is an indispensable component of the back-end packaging and placement machine for integrated circuit chips. The pushing structure is at the initial position of the lead frame conveyor chain, and can push the lead frame in the material box to the transport track. In the above-mentioned actions, situations such as the material box tilting, the material box clamps not running in place, or the loading track not running in place are likely to cause the lead frame to bend and deform, which in turn causes a jam in the pushing process. Therefore, most lead frame pushing structures are provided with a device for detecting whether there is a jam in the pushing process. However, in the current lead frame pushing structure, there are often situations where jams occur but are not detected, or where there are no jams but false alarms. Therefore, there is an urgent need for a lead frame pushing structure and a pusher that can more accurately detect jams during the pushing process. Summary of the invention

[0003] The object of the present invention is to provide a lead frame pushing structure and a pusher to solve the problems existing in the above-mentioned prior art and to more accurately detect the jamming situation during the pushing process.

[0004] To achieve the above object, the present invention provides the following solutions: The present invention provides a lead frame pushing structure, comprising: a pushing head, a pushing arm and a signal member, wherein the pushing head is movably connected to the pushing arm along a first direction, the pushing arm is used to be connected to the output end of a driving device, and the pushing arm can move along the first direction under the drive of the driving device, the signal member is arranged on the pushing head and the pushing arm and is used to connect with the signal of an external control device, and when the pushing head has a relative displacement with respect to the pushing arm, the signal member can transmit an alarm signal to the external control device.

[0005] In some embodiments, the pushing arm includes a pushing section and a connecting section, the length direction of the pushing section is parallel to the first direction, the length direction of the connecting section is perpendicular to the pushing section, one end of the pushing section is detachably fixedly connected to the connecting section, the pushing head is movably connected to the other end along one direction, and the end of the connecting section away from the pushing section is used to connect to the output end of the driving device.

[0006] In some embodiments, the pushing section includes a base, a mounting seat and a linear moving mechanism, one end of the base is detachably connected to the connecting section, and the other end is detachably connected to one end of the mounting seat, the linear moving mechanism is fixedly connected to the mounting seat, the linear moving mechanism has a free end, the pushing head is fixedly connected to the free end, and the free end can move along the first direction.

[0007] In some embodiments, the linear motion mechanism includes at least two telescopic probes, and the mounting seat is provided with a plurality of mounting holes extending along the first direction, and each of the mounting holes is fixedly connected with a telescopic probe, and the telescopic probe includes a needle, an outer tube and an elastic member, and the outer tube is fixedly connected to the mounting hole, and the needle is connected to the outer tube along the axial direction of the outer tube. The probe has a first supporting surface, and the outer tube has a second supporting surface, the first supporting surface and the second supporting surface are arranged opposite to each other, and the two ends of the elastic member are respectively against the first supporting surface and the second supporting surface, and the needle forms the free end of the linear motion mechanism, and one end of the pushing head is provided with a fixing hole, and the fixing hole corresponds to the probe one by one, and each of the probes is fixedly connected to one of the fixing holes.

[0008] In some embodiments, the signal component includes an optical fiber sensor and a sunshade, the base has a first cavity, the mounting base has a second cavity, the first cavity and the second cavity are connected to form a mounting cavity, the optical fiber sensor is fixedly connected to the mounting cavity, the mounting base has a groove at one end away from the base, the depth direction of the groove is parallel to the first direction, the two opposite side walls of the groove are respectively a first side wall and a second side wall, the first side wall and the second side wall are respectively provided with a first window and a second window connecting the second cavity and the outside world, the optical fiber sensor has two optical fiber ends, and the positions of the two optical fiber ends are Corresponding to the positions of the first window and the second window respectively, the light emitted by each of the two optical fiber ends can pass through the first window and the second window, the optical fiber sensor is used to connect the signal with the external control device, the shading plate is fixedly connected to the pushing head, the position of the shading plate corresponds to the position of the groove, when the pushing head is away from the mounting seat, the light emitted by each of the two optical fiber ends can pass through to form a counter-reflection, when the pushing head moves along the first direction toward the direction close to the mounting seat, the shading plate can enter the groove and block the counter-reflection of the two optical fiber ends, and the optical fiber sensor can transmit an alarm signal to the external control device.

[0009] In some embodiments, a fixing screw is also included, a through hole is provided on the shading plate, a screw hole is provided on the pushing head, and the fixing screw can pass through the through hole and be threadedly connected in the screw hole to connect the shading plate to the pushing head; an inspection port connecting the first cavity and the outside is provided on one side of the base, and the inspection port is covered and detachably connected with a cover plate.

[0010] In some embodiments, the connecting section includes an adjustment seat, a connecting seat and a driving seat that are detachably connected in sequence, one end of the adjustment seat away from the connecting seat is detachably connected to one end of the base, and the driving seat is used to connect to the output end of the driving device.

[0011] In some embodiments, a signal amplifier is further included, wherein the signal amplifier is fixedly connected to the pusher arm, the optical fiber sensor is signal-connected to the signal amplifier, and the signal amplifier is used to signal-connect to an external control device.

[0012] In some embodiments, the base and the adjustment seat are detachably connected via an adjustment bolt, the adjustment seat is provided with a plurality of adjustment screw holes, the base is provided with an adjustment through hole, the adjustment bolt can pass through the adjustment through hole and be threadedly connected in the adjustment screw hole, and each of the adjustment screw holes is sequentially arranged on the adjustment seat along a straight line perpendicular to the first direction.

[0013] The present invention also provides a pusher, comprising a body, a driving device and the lead frame pushing structure, wherein the driving device is fixedly connected to the body, and the lead frame pushing structure is fixedly connected to the output end of the driving device.

[0014] Compared with the prior art, the present invention has achieved the following technical effects: The lead frame pushing structure provided by the present invention, when no jam occurs, the driving device drives the pusher arm to move along the first direction, thereby causing the pusher head to move along the first direction and push the lead frame; when the lead frame jams, the lead frame is subjected to the resistance of the jam and causes the pusher head to slide along the first direction relative to the pusher arm, thereby having a relative displacement relative to the pusher arm, at which time the signal member can transmit an alarm signal to an external control device. Since the moving direction of the pusher arm driven by the driving device and the moving direction of the pusher head relative to the pusher arm are both the first direction, the pusher head can better receive the force feedback of the lead frame, and compared with the lead frame pushing structure in which the moving direction of the pusher head and the moving direction of the pusher arm are not colinear, torque offset is avoided, and jam detection during the pushing process is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a three-dimensional structural diagram of a lead frame pushing structure in some embodiments of the present invention; Figure 2 An exploded schematic diagram of a lead frame pushing structure in some embodiments of the present invention; Figure 3 A three-dimensional structural diagram of a mounting base in some embodiments of the present invention; In the figure: 1. Pushing head; 2. Pushing arm; 21. Pushing section; 211. Base; 212. Mounting seat; 213. Linear moving mechanism; 2131. Needle; 2132. Outer cylinder; 214. First cavity; 215. Mounting hole; 216. First window; 217. Second window; 218. Adjustment through hole; 219. Cover plate; 22. Connecting section; 221. Adjustment seat; 222. Connecting seat; 223. Driving seat; 224. Adjustment screw hole; 3. Fiber optic sensor; 4. Shading plate; 5. Signal amplifier; 6. Fixing screw. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The object of the present invention is to provide a lead frame pushing structure and a pusher to solve the problems existing in the above-mentioned prior art and to more accurately detect the jamming situation during the pushing process.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Embodiment 1 This embodiment provides a lead frame pushing structure, such as Figure 1-3As shown, it includes: a pushing head 1, a pushing arm 2 and a signal member, the pushing head 1 is movably connected to the pushing arm 2 along a first direction, the pushing arm 2 is used to be connected to the output end of the driving device, the pushing arm 2 can move along the first direction under the drive of the driving device, the signal member is arranged on the pushing head 1 and the pushing arm 2 and is used for signal connection with an external control device, when the pushing head 1 has a relative displacement with respect to the pushing arm 2, the signal member can transmit an alarm signal to the external control device.

[0021] The lead frame pushing structure provided in this embodiment, when no jam occurs, the driving device drives the push arm 2 to move in the first direction, thereby causing the push head 1 to move in the first direction and push the lead frame; when the lead frame is jammed, the lead frame is subjected to the resistance of the jam and causes the push head 1 to slide in the first direction relative to the push arm 2, thereby causing the push head 1 to be displaced relative to the push arm 2, at which time the signal member can transmit an alarm signal to an external control device. Since the direction in which the driving device drives the push arm 2 to move and the direction in which the push head 1 moves relative to the push arm 2 are both the first direction, the push head 1 can better receive the force feedback of the lead frame, and compared with the lead frame pushing structure in which the moving direction of the push head 1 is not colinear with the moving direction of the push arm 2, torque offset is avoided, and jam detection during the pushing process is more accurate.

[0022] To facilitate the installation and disassembly of the pushing arm 2, in one embodiment of the present embodiment, the pushing arm 2 includes a pushing section 21 and a connecting section 22. The length direction of the pushing section 21 is parallel to the first direction, and the length direction of the connecting section 22 is perpendicular to the pushing section 21. One end of the pushing section 21 is detachably fixedly connected to the connecting section 22, and the pushing head 1 is movably connected to the other end along one direction. The end of the connecting section 22 away from the pushing section 21 is used to be connected to the output end of the driving device.

[0023] In one embodiment of the present embodiment, the pusher section 21 includes a base 211, a mounting seat 212 and a linear moving mechanism 213. One end of the base 211 is detachably connected to the connecting section 22, and the other end is detachably connected to one end of the mounting seat 212. The linear moving mechanism 213 is fixedly connected to the mounting seat 212. The linear moving mechanism 213 has a free end, and the pusher head 1 is fixedly connected to the free end, and the free end can move along a first direction. When the lead frame is stuck, the pusher head 1 is subjected to resistance, and the free end of the linear moving mechanism 213 can move under the push of the pusher head 1, thereby realizing the movement of the pusher head 1 relative to the pusher section 21. Among them, the thickness of the pusher head 1, the base 211 and the mounting seat 212 is not more than 3 mm and preferably 3 mm.

[0024] In one embodiment of the present embodiment, the linear moving mechanism 213 includes at least two telescopic probes, and a plurality of mounting holes 215 extending along a first direction are provided on the mounting seat 212, and a telescopic probe is fixedly connected in each mounting hole 215, and the telescopic probe includes a needle 2131, an outer cylinder 2132 and an elastic member, the outer cylinder 2132 is fixedly connected in the mounting hole 215, and the needle 2131 is connected in the outer cylinder 2132 along the axial direction of the outer cylinder 2132. The probe has a first supporting surface, and the outer cylinder 2132 has a second supporting surface, and the first supporting surface and the second supporting surface are arranged opposite to each other, and the two ends of the elastic member respectively abut against the first supporting surface and the second supporting surface, and the needle 2131 forms the free end of the linear moving mechanism 213, and a fixing hole is provided at one end of the pushing head 1, and the fixing holes correspond to the probes one by one, and each probe is fixedly connected in a fixing hole. When there is no jamming, the needle 2131 stretches under the elastic force of the elastic member, so that the push head 1 can push the lead frame; when the push head 1 encounters resistance, the resistance is greater than the resilience of the elastic member, which enables the needle 2131 to retract the outer tube 2132 and compress the elastic member, and the push head 1 moves relative to the push arm 2. Preferably, two telescopic probes are provided, and the elastic member in the telescopic probe can be set to start compressing when encountering a resistance of 18-20g, and preferably 20g.

[0025] It should be noted that, in addition to the telescopic probe, the linear motion mechanism 213 can also be implemented in various ways such as a slide rail slider, a track roller, etc.

[0026] In one implementation of the present embodiment, the signal component includes an optical fiber sensor 3 and a light shielding plate 4, a first cavity 214 is provided in the base 211, a second cavity is provided in the mounting base 212, the first cavity 214 and the second cavity are connected to form a mounting cavity, the optical fiber sensor 3 is fixedly connected in the mounting cavity, the mounting base 212 has a groove at one end away from the base 211, the depth direction of the groove is parallel to the first direction, the two opposite side walls of the groove are respectively a first side wall and a second side wall, the first side wall and the second side wall are respectively provided with a first window 216 and a second window 217 connecting the second cavity and the outside, the optical fiber sensor 3 has two optical fiber ends, and the two optical fiber ends are The position corresponds to the position of the first window 216 and the second window 217 respectively, and the light emitted by the two optical fiber ends can pass through the first window 216 and the second window 217. The optical fiber sensor 3 is used for signal connection with the external control device. The shading plate 4 is fixedly connected to the push head 1. The position of the shading plate 4 corresponds to the position of the groove. When the push head 1 is away from the mounting seat 212, the light emitted by the two optical fiber ends can pass through to form a cross-reflection. When the push head 1 moves along the first direction toward the direction close to the mounting seat 212, the shading plate 4 can enter the groove and block the cross-reflection of the two optical fiber ends. The optical fiber sensor 3 can transmit an alarm signal to the external control device. The optical fiber sensor 3 and the shading plate 4 can sensitively sense the position state of the push head 1 and transmit the alarm signal to the external control device in a timely manner. In addition, there is no mutual force during the interaction between the optical fiber sensor 3 and the shading plate 4, which can make the detection of jams more accurate.

[0027] It should be noted that, in addition to the optical fiber sensor 3 and the shading plate 4, the signal component can also use other devices with interactive functions, such as electromagnetic switches and magnetic sheets. When the push head 1 operates normally, the magnetic sheet and the electromagnetic switch do not interact. At this time, the lead frame pushing structure operates normally. When the push head 1 and the push arm 2 are relatively displaced, the electromagnetic switch is opened by the magnetic sheet and an alarm signal is sent to the external control device.

[0028] In one implementation of the present embodiment, the lead frame pushing structure in the present embodiment further includes a fixing screw 6, a through hole is provided on the shading plate 4, a screw hole is provided on the pushing head 1, and the fixing screw 6 can pass through the through hole and be threadedly connected in the screw hole to connect the shading plate 4 to the pushing head 1; a maintenance port connecting the first cavity 214 and the outside is provided on one side of the base 211, and the maintenance port is covered and detachably connected with a cover plate 219. When the shading plate 4 needs to be replaced, the fixing screw 6 can be removed to remove the shading plate 4; by removing the cover plate 219, the optical fiber sensor 3 can be repaired and replaced through the maintenance port.

[0029] In order to facilitate the disassembly and installation of the connecting section 22, in one embodiment of the present embodiment, the connecting section 22 includes an adjustment seat 221, a connecting seat 222 and a driving seat 223 which are detachably connected in sequence, and one end of the adjustment seat 221 away from the connecting seat 222 is detachably connected to one end of the base 211, and the driving seat 223 is used to be connected to the output end of the driving device.

[0030] In one implementation of this embodiment, the lead frame pushing structure in this embodiment further includes a signal amplifier 5, the signal amplifier 5 is fixedly connected to the pushing arm 2, the optical fiber sensor 3 is signal-connected to the signal amplifier 5, and the signal amplifier 5 is used to connect to the external control device by signal. The signal amplifier 5 can amplify the alarm signal and improve the sensitivity of the external control device to the alarm signal detection.

[0031] In one implementation of the present embodiment, the base 211 and the adjustment base 221 are detachably connected by adjusting bolts, a plurality of adjusting screw holes 224 are provided on the adjustment base 221, and an adjusting through hole 218 is provided on the base 211. The adjusting bolt can pass through the adjusting through hole 218 and be threadedly connected in the adjusting screw hole 224. The adjusting screw holes 224 are sequentially arranged on the adjustment base 221 along a straight line perpendicular to the first direction. Since different types of pushers have different sizes, the pusher head 1 needs to correspond to different positions. At this time, the adjusting bolts can be removed, and the adjusting through holes 218 and different adjusting screw holes 224 can be installed in correspondence, and the position of the pusher section 21 relative to the adjustment base 221 in the perpendicular direction to the first direction can be changed.

[0032] Embodiment 2 This embodiment provides a pusher, including a body, a drive device and the lead frame pushing structure in the first embodiment, the drive device is fixedly connected to the body, and the lead frame pushing structure is fixedly connected to the output end of the drive device.

[0033] The pusher in this embodiment uses the lead frame pushing structure in the first embodiment, so that the pusher head 1 can better receive the force feedback of the lead frame, avoid torque offset, and more accurately detect jamming during the pushing process.

[0034] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A lead frame pushing structure, characterized in that: include: A pushing head, a pushing arm and a signal member, wherein the pushing head is movably connected to the pushing arm along a first direction, the pushing arm is used to be connected to the output end of a driving device, and the pushing arm can move along the first direction under the drive of the driving device. The signal member is arranged on the pushing head and the pushing arm and is used to connect with the signal of an external control device. When the pushing head has a relative displacement with respect to the pushing arm, the signal member can transmit an alarm signal to the external control device.

2. The lead frame pushing structure according to claim 1, characterized in that: The pushing arm includes a pushing section and a connecting section, the length direction of the pushing section is parallel to the first direction, the length direction of the connecting section is perpendicular to the pushing section, one end of the pushing section is detachably fixedly connected to the connecting section, the pushing head is movably connected to the other end along one direction, and the end of the connecting section away from the pushing section is used to connect to the output end of the driving device.

3. The lead frame pushing structure according to claim 2, characterized in that: The pushing section includes a base, a mounting seat and a linear moving mechanism. One end of the base is detachably connected to the connecting section, and the other end is detachably connected to one end of the mounting seat. The linear moving mechanism is fixedly connected to the mounting seat. The linear moving mechanism has a free end. The pushing head is fixedly connected to the free end. The free end can move along the first direction.

4. The lead frame pushing structure according to claim 3, characterized in that: The linear motion mechanism includes at least two telescopic probes, the mounting seat is provided with a plurality of mounting holes extending along the first direction, each of the mounting holes is fixedly connected with a telescopic probe, the telescopic probe includes a needle, an outer cylinder and an elastic member, the outer cylinder is fixedly connected to the mounting hole, the needle is connected to the outer cylinder along the axial direction of the outer cylinder, the probe is provided with a first supporting surface, the outer cylinder is provided with a second supporting surface, the first supporting surface and the second supporting surface are arranged opposite to each other, the two ends of the elastic member are respectively against the first supporting surface and the second supporting surface, the needle forms the free end of the linear motion mechanism, one end of the pusher head is provided with a fixing hole, the fixing hole corresponds to the probe one by one, and each of the probes is fixedly connected to one of the fixing holes.

5. The lead frame pushing structure according to claim 3, characterized in that: The signal component includes an optical fiber sensor and a light shielding plate. The base has a first cavity, the mounting base has a second cavity, the first cavity and the second cavity are connected to form a mounting cavity, the optical fiber sensor is fixedly connected to the mounting cavity, the mounting base has a groove at one end away from the base, the depth direction of the groove is parallel to the first direction, the two opposite side walls of the groove are respectively a first side wall and a second side wall, the first side wall and the second side wall are respectively provided with a first window and a second window connecting the second cavity and the outside world, the optical fiber sensor has two optical fiber ends, the positions of the two optical fiber ends are respectively The positions of the first window and the second window correspond to each other, and the light emitted by each of the two optical fiber ends can pass through the first window and the second window. The optical fiber sensor is used to connect the signal with the external control device. The shading plate is fixedly connected to the pushing head, and the position of the shading plate corresponds to the position of the groove. When the pushing head is away from the mounting seat, the light emitted by each of the two optical fiber ends can pass through to form a counter-reflection. When the pushing head moves along the first direction toward the direction close to the mounting seat, the shading plate can enter the groove and block the counter-reflection of the two optical fiber ends. The optical fiber sensor can transmit an alarm signal to the external control device.

6. The lead frame pushing structure according to claim 5, characterized in that: It also includes a fixing screw, a through hole is provided on the shading plate, and a screw hole is provided on the pushing head. The fixing screw can pass through the through hole and be threadedly connected in the screw hole to connect the shading plate to the pushing head; an inspection port connecting the first cavity and the outside world is provided on one side of the base, and the inspection port is covered and detachably connected with a cover plate.

7. The lead frame pushing structure according to claim 3, characterized in that: The connecting section comprises an adjustment seat, a connection seat and a driving seat which are detachably connected in sequence, one end of the adjustment seat away from the connection seat is detachably connected to one end of the base, and the driving seat is used to be connected to the output end of the driving device.

8. The lead frame pushing structure according to claim 5, characterized in that: It also includes a signal amplifier, which is fixedly connected to the pusher arm. The optical fiber sensor is connected to the signal amplifier by signal, and the signal amplifier is used to connect to the external control device by signal.

9. The lead frame pushing structure according to claim 7, characterized in that: The base and the adjustment seat are detachably connected via adjustment bolts. The adjustment seat is provided with a plurality of adjustment screw holes. The base is provided with an adjustment through hole. The adjustment bolt can pass through the adjustment through hole and be threadedly connected in the adjustment screw hole. The adjustment screw holes are sequentially arranged on the adjustment seat along a straight line perpendicular to the first direction.

10. A pusher, characterized in that: It comprises a body, a driving device and a lead frame pushing structure according to any one of claims 1 to 9, wherein the driving device is fixedly connected to the body, and the lead frame pushing structure is fixedly connected to the output end of the driving device.

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