Needle assembly with gravity balance device for die bonder

Abstract

The utility model discloses a kind of fixed crystal machine thimble assemblies with gravity balancing device, including thimble piece, voice coil motor and magnetic spring assembly, the voice coil motor is connected and drives the thimble piece vertical reciprocating motion, the voice coil motor includes voice coil motor rotor and voice coil motor stator, the magnetic spring assembly includes magnetic spring, the magnetic spring includes magnetic spring rotor and magnetic spring stator, the voice coil motor stator and the magnetic spring stator are fixed immovably, the voice coil motor rotor indirectly fixed connection the magnetic spring rotor. The beneficial effects of the utility model technical scheme are: in the present scheme, constant magnetic force spring is used, under the condition that load force is constant in guaranteeing motor operation process, due to the supporting effect of magnetic force, so that motor load is reduced, relatively small size motor can be selected, prolong the service life of motor while also reduce the working energy consumption.

Description

Technical Field

[0001] This utility model belongs to the field of die bonder technology, specifically relating to a die bonder ejector pin assembly with a gravity balancing device. Background Technology

[0002] In existing die bonding processes, a push-pin mechanism is needed to eject the chips one by one from the blue film for use by the die bonder. This process requires the push-pin mechanism to perform reciprocating and precise linear ejection movements. Existing technical solutions generally use a servo motor driving a cam mechanism or a voice coil motor as the driving force. During the movement, the motor is always subjected to the gravity of the moving parts. Especially when the power source is a voice coil motor, this will lead to excessive motor load and high motor temperature rise during long-term operation. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a die bonder ejector pin assembly with a gravity balancing device to overcome the shortcomings of the prior art.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] A die bonder ejector pin assembly with a gravity balancing device is provided, comprising an ejector pin, a voice coil motor, and a magnetic spring assembly. The voice coil motor is connected to and drives the ejector pin to perform vertical reciprocating motion. The voice coil motor includes a voice coil motor mover and a voice coil motor stator. The magnetic spring assembly includes a magnetic spring, which includes a magnetic spring mover and a magnetic spring stator. The voice coil motor stator and the magnetic spring stator are fixed, and the voice coil motor mover is indirectly fixedly connected to the magnetic spring mover.

[0006] As described above, the die bonder ejector assembly with gravity balancing device further includes a mover mounting plate and a stator mounting plate arranged vertically. The mover mounting plate is indirectly fixedly connected to the ejector pin. The voice coil motor and the magnetic spring are located between the mover mounting plate and the stator mounting plate. The magnetic spring assembly also includes a fixing seat. The voice coil motor stator and the magnetic spring stator are fixed to the stator mounting plate, the voice coil motor mover is fixed to the mover mounting plate, and the magnetic spring mover is fixedly connected to the mover mounting plate through the fixing seat.

[0007] As described in the die bonder pin assembly with gravity balancing device, the fixing base includes a vertical plate and a horizontal plate. The horizontal plate is fixedly connected to the magnetic spring mover. The upper end of the vertical plate is fixedly connected to the mover mounting plate, and the lower end is fixedly connected to the horizontal plate.

[0008] As described in the die bonder pin assembly with gravity balancing device, a notch is provided on one side of the mover mounting plate, and the upper end of the magnetic spring stator is accommodated within the notch.

[0009] The beneficial effects of this utility model's technical solution are:

[0010] This solution uses a constant magnetic spring. While ensuring a constant load force during motor operation, the magnetic support reduces the motor load, allowing for the selection of a smaller motor model. This extends the motor's lifespan and reduces energy consumption. Attached Figure Description

[0011] To further illustrate the above-mentioned objectives, structural features, and effects of this utility model, the following will describe this utility model in detail with reference to the accompanying drawings.

[0012] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention;

[0013] In the diagram: 1. Ejector pin; 2. Voice coil motor mover; 3. Voice coil motor stator; 4. Magnetic spring mover; 5. Magnetic spring stator; 6. Mover mounting plate; 7. Stator mounting plate; 8. Vertical plate; 9. Horizontal plate; 10. Notch. Detailed Implementation

[0014] The terms “utility model” and “this utility model” used in this specification are intended to broadly refer to all subject matter of this specification and any of the following patent claims. Statements containing these terms should not be construed as limiting the subject matter described herein or limiting the meaning or scope of any of the following patent claims. Furthermore, this specification does not attempt to describe or limit the subject matter covered by any claim of any particular component, paragraph, statement, or drawing of this application. The subject matter should be understood with reference to the entire specification, all drawings, and any of the following claims. This utility model may have other embodiments and be practiced or implemented in other ways. Moreover, it should be understood that the wording and terminology used herein are for illustrative purposes and should not be considered limiting.

[0015] The details of the present invention will now be discussed with reference to the accompanying drawings, which are illustrated by way of example only. In the drawings, similar features or components may be labeled with the same reference numerals.

[0016] The use of the terms "comprising," "having," and "including," and variations thereof, herein means to include the items listed herein, their equivalents, and additional items. While reference may be made in the description of the drawings to directions such as above, below, upward, downward, backward, bottom, top, front, rear, etc., for convenience, reference is made relative to the drawings. These directions are not intended to literally accept or limit the invention in any form. Furthermore, terms such as "first," "second," "third," etc., are used herein for illustrative purposes and are not intended to indicate or imply importance or significance.

[0017] See Figure 1 As shown, the die bonder pin assembly with gravity balancing device of this utility model includes a pin 1, a voice coil motor, and a magnetic spring assembly. The voice coil motor connects to and drives the pin 1 to perform vertical reciprocating motion, controlling the pin 1 to lift the chip to the pickup position. The voice coil motor includes a voice coil motor mover 2 and a voice coil motor stator 3. The magnetic spring assembly includes a magnetic spring, which includes a magnetic spring mover 4 and a magnetic spring stator 5. The magnetic spring mover 4 and the magnetic spring stator 5 move relative to each other through magnetic force. The voice coil motor stator 3 and the magnetic spring stator 5 are fixed, and the voice coil motor mover 2 is indirectly and fixedly connected to the magnetic spring mover 4.

[0018] In a preferred embodiment, the ejector assembly further includes a mover mounting plate 6 and a stator mounting plate 7 arranged vertically. The mover mounting plate 6 indirectly fixes the ejector component 1, and the voice coil motor and the magnetic spring are located between the mover mounting plate 6 and the stator mounting plate 7. The magnetic spring assembly also includes a fixing seat. The voice coil motor stator 3 and the magnetic spring stator 5 are fixed on the stator mounting plate 7, the voice coil motor mover 2 is fixed on the mover mounting plate 6, and the magnetic spring mover 4 is fixedly connected to the mover mounting plate 6 through the fixing seat.

[0019] Furthermore, the fixed base includes a vertical plate 8 and a horizontal plate 9. The horizontal plate 9 is fixedly connected to the magnetic spring mover 4. The upper end of the vertical plate 8 is fixedly connected to the mover mounting plate 6, and the lower end is fixedly connected to the horizontal plate 9. The horizontal plate 9 is also a clamping seat. The magnetic spring mover 4 is connected to the voice coil motor mover 2 via the clamping seat and other components. Through this connection arrangement, the weight of the moving part is balanced by the constant magnetic force spring.

[0020] Referring to the diagram, a notch 10 is provided on one side of the mover mounting plate 6. The upper end of the magnetic spring stator 5 is housed in the notch 10, which can further stabilize the magnetic spring during the movement of the voice coil motor.

[0021] Magnetic springs require no power supply and maintain a constant force even when power is off, generating a continuous constant force within their stroke range, making them particularly suitable for vertical installation. In terms of parameters, the effective stroke of the magnetic spring is 100-150mm, and the magnetic force is 10-30N, ensuring that the magnetic force is effective throughout the motor's operation.

[0022] In this design, the voice coil motor serves as the power source, driving the ejector pin 1 to perform each step of the movement via the guide shaft and other components. During the movement, the magnetic spring bears the weight of the moving parts. When the voice coil motor is in the equilibrium position, its force is zero. The spring force of the magnetic spring is constant throughout the entire stroke range, and the spring force is vertically upward.

[0023] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A die bonder ejector pin assembly with a gravity balancing device, characterized in that, The device includes a ejector pin, a voice coil motor, and a magnetic spring assembly. The voice coil motor is connected to and drives the ejector pin to perform vertical reciprocating motion. The voice coil motor includes a voice coil motor mover and a voice coil motor stator. The magnetic spring assembly includes a magnetic spring, which includes a magnetic spring mover and a magnetic spring stator. The voice coil motor stator and the magnetic spring stator are fixed in place, and the voice coil motor mover is indirectly and fixedly connected to the magnetic spring mover.

2. The die bonder ejector pin assembly with gravity balancing device as described in claim 1, characterized in that, It also includes a moving part mounting plate and a stator mounting plate arranged vertically. The moving part mounting plate is indirectly fixedly connected to the ejector pin. The voice coil motor and the magnetic spring are located between the moving part mounting plate and the stator mounting plate. The magnetic spring assembly also includes a fixing seat. The voice coil motor stator and the magnetic spring stator are fixed to the stator mounting plate. The voice coil motor moving part is fixed to the moving part mounting plate. The magnetic spring moving part is fixedly connected to the moving part mounting plate through the fixing seat.

3. The die bonder ejector pin assembly with gravity balancing device as described in claim 2, characterized in that, The mounting base includes a vertical plate and a horizontal plate. The horizontal plate is fixedly connected to the magnetic spring mover. The upper end of the vertical plate is fixedly connected to the mover mounting plate, and the lower end is fixedly connected to the horizontal plate.

4. The die bonder ejector pin assembly with gravity balancing device as described in claim 2, characterized in that, The moving part mounting plate has a notch on one side, and the upper end of the magnetic spring stator is accommodated in the notch.

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