Transfer frame

Abstract

The utility model provides a transfer frame which comprises two opposite side frame bodies arranged in a spaced mode, an adjusting mechanism is arranged above the two side frame bodies, the two side frame bodies are movably matched with the bottom of the adjusting mechanism, and the adjusting mechanism is used for adjusting the distance between the two side frame bodies. The opposite surfaces of the two side frame bodies are provided with a plurality of placing grooves along the length direction of the side frame bodies, and the placing grooves are used for placing lead frames. The frame bodies on the two sides are elastically connected through an elastic telescopic mechanism. According to the transfer frame, the internal space for placing the lead frames can be adjusted, so that batch transfer of the lead frames with different sizes can be realized.

Description

Technical Field

[0001] The present application belongs to the technical field of semiconductor packaging device manufacturing, and in particular, relates to a transfer rack. Background Art

[0002] Some semiconductor packaging devices are usually made of lead frames, bonding chips and jumpers, plastic packaging, cutting, etc. In the entire process, the lead frame is the carrier of each semiconductor component and needs to be transferred multiple times.

[0003] In the prior art, the space inside the transfer rack for placing the lead frame is fixed, so that such a transfer rack can only transport and transfer lead frames of a fixed size. Such a transfer rack is not highly compatible with lead frames and cannot adapt to lead frames of various sizes, thus affecting production efficiency. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies of the prior art, the present application provides a transfer rack, which can adjust the space inside for placing lead frames to achieve batch transfer of lead frames of different sizes.

[0005] In order to achieve the above purpose, the utility model adopts the following technologies:

[0006] A transfer rack is used for transferring lead frames to be plastic-encapsulated in batches, comprising two side frames arranged at a distance from each other, an adjustment mechanism is arranged above the two side frames, the two side frames move to match the bottom of the adjustment mechanism, and the adjustment mechanism is used to adjust the distance between the two side frames; a plurality of placement grooves are provided on the opposite surfaces of the two side frames along the length direction of the side frames for placing the lead frames;

[0007] The frames on both sides are elastically connected via an elastic telescopic mechanism.

[0008] Furthermore, the elastic telescopic mechanism includes guide seats arranged at the top and bottom of the two side frames, and a guide rod is arranged between the guide seats corresponding to each other on the two side frames. The guide rod is facing the moving direction of the side frame, and the two ends of the guide rod are movably inserted into the two guide seats; a return spring is sleeved on the guide rod between the guide seats at the top of the two side frames, and the two ends of the return spring are respectively connected to the corresponding guide seats.

[0009] Furthermore, the adjustment mechanism includes a cam rotatably arranged between guide seats at the top of the side frame body; an adjustment frame is arranged parallel to the cam, a first rotating shaft is vertically connected to the top of the cam, the first rotating shaft passes through the adjustment frame and is connected to a cam knob; a locking unit is arranged inside the adjustment frame for locking the first rotating shaft.

[0010] Furthermore, the locking unit includes a ratchet coaxially arranged with the first rotating shaft, which is located inside the adjustment frame. A second rotating shaft parallel to the first rotating shaft is provided on one side of the ratchet. The lower end of the second rotating shaft rotatably cooperates with the bottom surface of the adjustment frame, and the upper end passes through the top surface of the adjustment frame and is connected to a lever knob. A lever is provided on the second rotating shaft, one end of the lever is vertically connected to the second rotating shaft, and a braking claw is provided on the other end of the lever. A first torsion spring is sleeved on the second rotating shaft. When the first torsion spring is in a natural state, the braking claw is tightly attached to the outer edge of the ratchet.

[0011] Furthermore, a second torsion spring is sleeved on the first rotating shaft, one end of the second torsion spring is connected to the top of the ratchet wheel, and the other end is connected to the adjustment frame.

[0012] Furthermore, a knob groove is opened downwardly from the top of the adjustment frame, and the cam knob and the lever knob are both located inside the knob groove; both sides of the adjustment frame are coplanar or parallel to the side surfaces of the corresponding side frame bodies.

[0013] The beneficial effects of the utility model are:

[0014] 1. According to the size of the lead frame to be transferred, operate the adjustment mechanism to make the two side frames 1 at a suitable distance to achieve the transfer of lead frames of different sizes, and restore the position under the action of the elastic telescopic mechanism;

[0015] 2. By setting the guide seat and the guide rod in the elastic telescopic mechanism, the two side frames move toward each other along a fixed straight line, so that the placement grooves set on the side frames are not misaligned with the placement grooves set on the corresponding side frames, which facilitates the placement of the lead frame and improves production efficiency;

[0016] 3. The first rotating shaft is locked by means of a ratchet and a brake pawl, which has a simple structure, reliable operation and low use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the transfer rack of the embodiment of the present application.

[0018] Figure 2 It is a cross-sectional view along the length direction of the adjustment mechanism in the transfer rack of the embodiment of the present application.

[0019] Figure 3 It is an enlarged view of the ratchet in the transfer rack of the embodiment of the present application.

[0020] Figure 4 It is an axial side view of the transfer rack according to an embodiment of the present application.

[0021] Figure markings: 1-side frame, 11-placing groove, 2-elastic telescopic mechanism, 21-guide seat, 22-guide rod, 23-reset spring, 3-adjustment mechanism, 31-cam, 32-adjustment frame, 33-knob groove, 34-first rotating shaft, 35-cam knob, 36-locking unit, 361-ratchet, 362-second rotating shaft, 363-lever knob, 364-lever, 365-brake claw, 366-first torsion spring, 367-second torsion spring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings, but the embodiments described in the utility model are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] The present application embodiment provides a transfer rack, such as Figure 1 As shown, it includes two side frames 1 arranged relatively at a distance, an adjustment mechanism 3 is arranged above the two side frames 1, and the two side frames 1 move to cooperate with the bottom of the adjustment mechanism 3, and the adjustment mechanism 3 is used to adjust the distance between the two side frames 1; a plurality of placement grooves 11 are opened on the opposite surfaces of the two side frames 1 along the length direction of the side frames 1 for placing lead frames; the two side frames 1 are elastically connected by an elastic telescopic mechanism 2.

[0024] Specifically, the transfer rack can adapt to lead frames of various sizes by adjusting and locking the distance between the two side frames 1, thereby improving the compatibility of the transfer rack with the lead frame and improving production efficiency. When using the device, first operate the adjustment mechanism 3 according to the size of the lead frame, so that the two side frames 1 are separated, and when the placement grooves 11 set on the opposite surfaces of the two side frames 1 can place the two ends of the lead frame, the side frame 1 stops moving, and under the action of the adjustment mechanism 3, the positions of the two side frames 1 are fixed, that is, the distance between the two side frames 1 is locked; then the two ends of the batch of lead frames are placed in the corresponding placement grooves 11, so as to realize the batch transfer of the lead frames; after the transfer is completed, operate the adjustment mechanism 3, and under the action of the release of elastic potential energy in the elastic telescopic mechanism 2, the two side frames 1 are quickly retracted, and the above operation is repeated.

[0025] like Figure 1 and Figure 4 As shown, the elastic telescopic mechanism 2 includes guide seats 21 arranged at the top and bottom of the two side frames 1, and a guide rod 22 is arranged between the guide seats 21 corresponding to each other on the two side frames 1. The guide rod 22 faces the moving direction of the side frame 1, and the two ends of the guide rod 22 are movably inserted into the two guide seats 21; a return spring 23 is sleeved on the guide rod 22 between the guide seats 21 at the top of the two side frames 1, and the two ends of the return spring 23 are respectively connected to the corresponding guide seats 21.

[0026] Specifically, when using the device, the adjustment mechanism 3 is operated to make the two side frames 1 move apart along the guide rod 22, and the reset spring 23 is stretched, and the reset spring 23 begins to store elastic potential energy; after the adjustment mechanism 3 locks the distance between the two side frames 1, the lead frame is transferred, during which the reset spring 23 is always in a stretched state; after the transfer is completed, the adjustment mechanism 3 releases the lock of the distance between the two side frames 1, and the reset spring 23 releases the elastic potential energy, so that the two side frames 1 are closed along the direction of the guide rod 22. Due to the action of the guide rod 22, the two side frames 1 can move toward each other along a straight line, so that the placement groove 11 set on the side frame 1 does not misalign with the placement groove 11 set on the corresponding side frame 1, which is convenient for placing the lead frame and improves production efficiency; under the action of the reset spring 23, the side frame 1 can be automatically reset, which improves the automation of the device.

[0027] Specifically, Figure 1 and Figure 2 As shown, when the distance between the side frames 1 needs to be adjusted, it is only necessary to rotate the cam knob 35 to rotate the cam 31, and the outer edge of the cam 31 abuts against the guide seat 21 at the top of the side frame 1, pushing the side frame 1 to move along the guide rod 22. As the cam 31 rotates, the distance between the two side frames 1 gradually increases. When the distance is appropriate, the locking unit 36 ​​locks the first rotating shaft 34, and the position of the cam 34 is fixed, thereby locking the positions of the two side frames 1. The distance between the side frames 1 is controlled by rotating and locking the cam 34, and the control method is simple and low in cost.

[0028] Preferably, the locking unit 36 ​​can lock the first rotating shaft 34 by means of a positioning hole and a positioning pin, or by sleeved gears on the first rotating shaft 34 so that the gears mesh with the driving end gears of the motor with a self-locking function. Since there are no high requirements for accuracy and noise during the use of the transfer rack and the separation and closing of the two side plates 1, the present embodiment adopts a ratchet mechanism, which has a simple structure, is easy to manufacture, works reliably, and has a low cost of use.

[0029] Specifically, Figures 1 to 3As shown, when the cam knob 35 is rotated, the first rotating shaft 34 drives the ratchet 361 and the cam 31 to rotate together. During this period, the braking claw 365 is always tightly attached to the outer edge of the ratchet 361 under the action of the first torsion spring 366. When the distance between the two side frames 1 is appropriate, the cam knob 35 is released. Since the cam 31 and the guide seat 21 are in line contact, under the action of the elastic telescopic mechanism 2, the two side frames 1 should be quickly retracted and force the cam 31 to rotate. However, when the cam 31 rotates, the braking claw 365 abuts between the two teeth of the ratchet 361, so that the ratchet 361 cannot rotate with the cam 31, thereby locking the first rotating shaft 34, that is, fixing the distance between the two side frames 1; when the lead frame is transferred, the lever knob 363 is rotated to disengage the braking claw 365 from the outer edge of the ratchet 361, and the cam 31 rotates under the action of the elastic telescopic mechanism 2, so that the two side frames 1 return to the initial position.

[0030] like Figure 3 As shown, a second torsion spring 367 is sleeved on the first rotating shaft 34 , one end of the second torsion spring 367 is connected to the top of the ratchet 361 , and the other end is connected to the adjustment frame 32 .

[0031] Specifically, due to the action of the second torsion spring 367, after the braking claw 365 is separated from the outer edge of the ratchet 361, the cam 31 rotates faster, which also avoids the problem of the side frame body 1 not returning to its original position in time due to the elastic telescopic mechanism 2 being used for too long, thereby increasing the service life and reliability of the device.

[0032] Preferably, Figure 1 and Figure 2 As shown, a knob groove 33 is opened downward from the top of the adjustment frame 32, and the cam knob 35 and the lever knob 363 are both located inside the knob groove 33; both sides of the adjustment frame 32 are coplanar or parallel to the side of the corresponding side frame body 1. During the transfer process of the lead frame, multiple transfer racks are usually used for transfer, and the cam knob 35 and the lever knob 363 are set in the knob groove 33, so that the top of the adjustment frame 32 is flat; when the two side frames 1 are in the initial position, both sides of the adjustment frame 32 are coplanar with the side of the corresponding side frame body 1; when the two side frames 1 are separated, both sides of the adjustment frame 32 are parallel to the side of the corresponding side frame body 1; through the above settings, the appearance structure of the transfer device is optimized, and it is convenient for multiple transfer devices to be stacked and stacked, thereby improving the transfer efficiency of the lead frame.

[0033] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application.

Claims

1. A transfer rack for transferring lead frames to be encapsulated in batches, characterized in that: The invention comprises two side frames (1) arranged at a distance from each other, an adjustment mechanism (3) being arranged above the two side frames (1), the two side frames (1) being movable and matched to the bottom of the adjustment mechanism (3), and the adjustment mechanism (3) being used to adjust the distance between the two side frames (1); a plurality of placement grooves (11) are provided on the opposite surfaces of the two side frames (1) along the length direction of the side frames (1) for placing lead frames; The two side frames (1) are elastically connected via an elastic telescopic mechanism (2).

2. A transfer rack according to claim 1, characterized in that: The elastic telescopic mechanism (2) comprises guide seats (21) arranged at the top and bottom of the two side frames (1); a guide rod (22) is arranged between the guide seats (21) corresponding to each other on the two side frames (1); the guide rod (22) faces the moving direction of the side frame (1), and the two ends of the guide rod (22) are movably inserted into the two guide seats (21); a return spring (23) is sleeved on the guide rod (22) between the guide seats (21) at the top of the two side frames (1), and the two ends of the return spring (23) are respectively connected to the corresponding guide seats (21).

3. A transfer rack according to claim 2, characterized in that: The adjustment mechanism (3) comprises a cam (31) rotatably arranged between guide seats (21) at the top of the side frame body (1); an adjustment frame (32) is arranged above the cam (31) in parallel, a first rotating shaft (34) is vertically connected to the top of the cam (31), the first rotating shaft (34) passes through the adjustment frame (32) and is connected to a cam knob (35); a locking unit (36) is arranged inside the adjustment frame (32) for locking the first rotating shaft (34).

4. A transfer rack according to claim 3, characterized in that: The locking unit (36) comprises a ratchet (361) coaxially arranged with the first rotating shaft (34) and located inside the adjustment frame (32); a second rotating shaft (362) parallel to the first rotating shaft (34) is provided on one side of the ratchet (361); the lower end of the second rotating shaft (362) is rotatably engaged with the bottom surface of the adjustment frame (32); the upper end passes through the top surface of the adjustment frame (32) and is connected to a lever knob (363); a lever (364) is provided on the second rotating shaft (362); one end of the lever (364) is vertically connected to the second rotating shaft (362); a braking claw (365) is provided on the other end of the lever (364); a first torsion spring (366) is sleeved on the second rotating shaft (362); when the first torsion spring (366) is in a natural state, the braking claw (365) is tightly attached to the outer edge of the ratchet (361).

5. A transfer rack according to claim 4, characterized in that: A second torsion spring (367) is sleeved on the first rotating shaft (34); one end of the second torsion spring (367) is connected to the top of the ratchet wheel (361), and the other end is connected to the adjustment frame (32).

6. A transfer rack according to claim 4, characterized in that: A knob groove (33) is provided downwardly at the top of the adjustment frame (32), and the cam knob (35) and the lever knob (363) are both located inside the knob groove (33); both sides of the adjustment frame (32) are coplanar or parallel to the side surfaces of the corresponding side frame body (1).

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