JP3628645B2 - Electronic component measuring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus capable of measuring an electronic component to be measured by pressing and fixing the electronic component to be measured at a predetermined measurement position with a predetermined pressure, for example, in an automatic measurement apparatus that performs inspection / calibration of the electronic component.
[0002]
[Prior art]
In an automatic measuring device that performs inspection / calibration of electronic components, when measuring electronic components, the electronic components are pressed against a circuit for inspection by pressing the electronic components to a predetermined measurement position with a predetermined pressure. It is necessary to conduct the connection in an appropriate state. For this reason, some conventional electronic component automatic measuring apparatuses illustrated in FIG. 3 include an electronic component pressure welding device for fixing the electronic component to a measurement position with a predetermined pressure.
[0003]
As shown in FIG. 3, the electronic component pressure welding apparatus includes a pressing device main body 101 (hereinafter referred to as “main body”) that can be reciprocated within a predetermined range by a power source 100. Inside the outer main body 101, a pressing body 102 for pressing an electronic component is provided so as to be movable from the lower end of the main body 101. An adjustment screw 103 is screwed into the upper end of the main body 102. In the main body 101, a single spring 104 is provided between the adjustment screw 103 and the pressing body 102 so as to apply a biasing force to the pressing body 102.
[0004]
Below the electronic component pressure welding device is an electronic component conveyance positioning device 200. The transport positioning apparatus 200 includes a disc 201 that can be intermittently rotated by a predetermined angle, and a plurality of holding devices 202 that are provided on the disc 201 at predetermined angular intervals in the rotation direction. The holding device 202 can be moved in the axial direction by a rod-like member 203 provided perpendicular to the surface of the disc 201 and can be returned to its original position via a spring 204. A holding nozzle 205 that sucks and holds the electronic component is provided at the lower end of the holding device 202, and the electronic component 300 can be held at the tip by the suction force of the suction device.
[0005]
An electronic component measurement unit 400 is provided below the conveyance positioning device. The measuring unit 400 is electrically connected to a probe circuit for inspection (a circuit for connecting the electronic component and the measuring unit) when the electronic component 300 is crimped at a predetermined pressure, and performs electrical measurement of the electronic component 300. An inspection unit to perform, and a pressing force detection device that supports the inspection unit and measures the pressure applied to the electronic component during the inspection.
[0006]
In such a configuration, when the main body 101 is moved and the holding device 202 that holds the electronic component 300 is pressed by the tip of the pressing body 102, the electronic component 300 is pressed against the inspection unit of the measurement unit 400. Here, after the electronic component 300 is pressed to the inspection position of the inspection unit, if the main body 101 is further moved toward the electronic component 300 by an appropriate stroke, the electronic component 300 is brought to a desired pressure by the deflection of the spring 104. Pressed against the specimen.
[0007]
Here, the electronic component is measured. After the measurement, the electronic component pressure welding device is lifted and separated from the holding device 202, and the holding device 202 returns to the upper original position by the return force of the spring 204 while holding the electronic component 300. Then, the disk 201 of the conveyance positioning device 200 rotates, and the measured electronic component 300 is sent to the next step.
[0008]
[Problems to be solved by the invention]
In the conventional automatic measuring apparatus described above, it is necessary to complete the measurement of the electronic component in as short a time as possible in order to improve the processing efficiency. For this purpose, the electronic component is set at the measurement position and then applied to the electronic component. I want to shorten the time required for the pressure to reach the predetermined measurement pressure. Therefore, according to the conventional electronic component pressure welding apparatus, after the electronic component contacts the probe circuit of the inspection unit, the stroke when moving the main body toward the electronic component in order to apply a desired pressure to the electronic component ( It is necessary to shorten the travel distance as much as possible.
[0009]
That is, in the conventional automatic measuring apparatus described above, when the electronic component is pressure-bonded to the probe circuit of the inspection unit, the pressure applied to the electronic component reaches a predetermined value with the stroke of the main body 101 as short as possible. Desirable from the viewpoint of efficiency.
[0010]
Here, in the conventional automatic measuring apparatus described above, the force is applied to the electronic component by the deflection of the single spring 104, so that the amount of movement of the main body 101 corresponding to the deflection of the spring is shortened to obtain a desired pressing force. In order to obtain it, it was necessary to use a so-called hard spring having a large spring constant.
[0011]
However, it has been difficult to adjust the urging force of a hard spring having a large spring constant by setting the amount of deflection. In other words, since the force for holding the electronic component deviates from a desired value by setting the deflection amount of the spring only slightly, it is difficult to set the deflection amount appropriately in advance and adjust the initial load. there were.
[0012]
It is an object of the present invention to provide a measuring apparatus including an electronic component pressure welding device that can easily set an initial load and can apply a desired accurate load with a short stroke even when the electronic component is pressed. Yes.
[0014]
The electronic component measuring apparatus according to claim 1 is capable of moving up and down in an electronic component measuring apparatus that measures the electrical characteristics of the electronic component by pressing the electronic component to be measured against the probe circuit with a predetermined load. A housing part (5), a pressing body (6) that is provided so as to be movable in the housing part, one end of which projects out of the housing part and presses the electronic component, and is movable with respect to the housing part The first adjustment member (10) screwed to be, and the amount of screwing of the first adjustment member into the accommodation portion provided between the pressing body and the first adjustment member inside the accommodation portion. The first spring (11) whose load applied to the pressing body is adjusted accordingly, and one end of the first spring (11) protrudes outside the first adjusting member and moves to the inside of the first adjusting member so as to contact the pressing body. Possible transmission member (1 ), The second adjustment member (16) screwed so as to be movable with respect to the first adjustment member, and a spring constant different from that of the first spring, and within the first adjustment member A second spring (17) provided between the transmission member and the second adjustment member, wherein a load applied to the transmission member is adjusted in accordance with a screwing amount of the second adjustment member with respect to the first adjustment member; Drive means (2) for raising and lowering the accommodating portion in the direction of applying the load.
[0015]
The electronic component measuring apparatus according to claim 2 is the electronic component measuring apparatus according to claim 1 , wherein the electronic component is made larger by making a spring constant of the first spring larger than a spring constant of the second spring. The pressing load can be roughly adjusted by the first adjustment member, and fine adjustment can be made by the second adjustment member.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
An example of an embodiment of the present invention will be described with reference to FIGS.
The present invention is an automatic measuring apparatus for inspecting and calibrating electronic components described in the section of the prior art, and is for temporarily fixing an electronic component at a measurement position with a predetermined pressure. The configuration / functions of the electronic component conveying / positioning device, the measuring unit, and the like, and the arrangement of the electronic component pressure welding device in the entire apparatus are the same as those in the prior art, and thus the description thereof is omitted. Since the structural feature of the present invention is in the electronic component pressure welding device, this portion will be referred to as this device and will be described below.
[0017]
As shown in FIGS. 1 and 2, the driving means 2 is fixed to the beam portion of the portal frame 1 which is a fixed portion of the apparatus. The drive means 2 has a motor and a ball screw mechanism that converts the rotation of the motor into a linear motion of the drive shaft. When the motor is driven, the drive shaft 3 moves up and down along the vertical direction.
[0018]
A receiving portion 5 is attached to the lower end of the drive shaft 3 of the drive means 2 via a connecting plate 4. The accommodating part 5 is a vertically long hollow box-shaped member in the moving direction. A pressing body 6 is movably provided in the internal space of the housing portion 5. The pressing body 6 has a rod-shaped portion 6a and a flange portion 6b provided at the upper end of the rod-shaped portion. The distal end of the rod-like portion 6 a of the pressing body 6 communicates with the internal space 7 and protrudes to the outside from a through hole 8 formed at the lower end of the accommodating portion 5. The flange portion 6 b of the pressing body 6 is locked to the inlet of the through hole 8 inside the housing portion 5 so that the pressing body 6 does not come out of the housing portion 5.
[0019]
A screw hole 9 is formed at the upper end of the housing portion 5 so as to communicate with the internal space 7. A first adjusting member 10 is screwed into the screw hole 9. If the first adjustment member 10 is rotated, the insertion length of the first adjustment member 10 with respect to the internal space 7 of the housing portion 5 can be adjusted. A first spring 11 is provided between the pressing body 6 and the first adjustment member 10 in the internal space 7 of the housing portion 5. If the screwing amount of the first adjusting member 10 into the housing portion 5 is adjusted, the amount of deflection of the first spring 11 changes according to the adjusting amount, and the load applied to the pressing body 6 by the first spring 11 is adjusted. The
[0020]
The first adjusting member 10 has an internal space 12 penetrating vertically. A screw hole 13 is formed at the upper end of the internal space 12 and a small-diameter through hole 14 is formed at the lower end. A transmission member 15 is movably provided in the internal space 12 of the first adjustment member 10. The transmission member 15 has a rod-shaped portion and a flange portion provided at the upper end of the rod-shaped portion. The distal end of the rod-like portion 15 a of the transmission member 15 protrudes outside from the through hole 14 and abuts on the flange portion 6 b of the pressing body 6. The flange portion 15 b of the transmission member 15 is locked to the inlet of the through hole 14 in the internal space 12 of the first adjustment member 10, so that the transmission member 15 does not come out of the first adjustment member 10.
[0021]
A second adjustment member 16 is screwed into the screw hole 13 of the first adjustment member 10. If the second adjustment member 16 is rotated, the insertion length of the second adjustment member 16 with respect to the internal space 12 of the first adjustment member 10 can be adjusted. A second spring 17 is provided between the transmission member 15 and the second adjustment member 16 in the internal space 12 of the first adjustment member 10. If the screwing amount of the second adjusting member 16 with respect to the first adjusting member 10 is adjusted, the deflection amount of the second spring 17 changes according to the adjusting amount, and the load applied to the transmission member 15 by the second spring 17 is increased. Adjusted.
[0022]
The spring constant of the first spring 11 is larger than the spring constant of the second spring 17. That is, the first spring 11 is a spring that is less likely to bend.
[0023]
The operation of the above configuration will be described.
When the electronic component is measured, when the drive shaft 3 is lowered along the vertical direction by driving the motor, the electronic component pressure welding device is also lowered to push down the holding device 202 of the transport positioning device 200. The electronic component 300 held at the lower end of the holding device 202 is pressed against the probe circuit of the inspection unit of the measurement unit 400. After the load detection device of the inspection unit detects that the electronic component 300 has hit the probe circuit of the inspection unit, the motor stops when the electronic component pressure welding device is further lowered by a predetermined dimension. Here, since the initial load of the first and second springs 11 and 17 of the electronic component pressure welding device is set to an appropriate value in advance by the first and second adjustment members 10 and 16, the above-mentioned predetermined By bending only the dimensions, the electronic component 300 can be pressed against the probe circuit of the inspection unit with a predetermined load determined in advance. Here, measurement by the inspection part of the electronic component is performed.
[0024]
In this example, in order to improve the processing efficiency, the movement distance of the electronic component pressure welding apparatus from the time when the electronic component is set to the measurement position until the load applied to the electronic component reaches a predetermined value is made as short as possible to shorten the tact time. doing. That is, the load applied to the electronic component reaches a predetermined value while the electronic component pressure welding apparatus moves by a predetermined short distance after the electronic component is set at the inspection position, and the measurement of the electronic component can be quickly started. I can do it. Therefore, the initial load as the whole electronic component pressure welding apparatus is appropriately set by adjusting the deflection amounts of the first spring 11 and the second spring 17 having different spring constants. Specifically, the first adjustment member 10 is adjusted so that the amount of deflection of the first spring 11 having a large spring constant is appropriately set, generally adjusted to a desired initial load, and further the second adjustment member 16 is adjusted. Then, the amount of deflection of the second spring 17 having a small spring constant is set appropriately, and is accurately adjusted to a desired initial load. For example, when the spring constant of the first spring 11 is 4.5 N / mm and the spring constant of the second spring 17 is 0.5 N / mm, the initial load increases from 5 N to 20 N with a movement amount of 3 mm. Set to.
[0025]
In addition, some electronic components to be measured have a number of terminals exceeding 50 pins in recent years, and the number of terminals varies. Since the larger the number of terminals, the greater the force required to be pressed, it is desirable that the electronic component pressure welding apparatus can be set to an arbitrary wide range of loads (5 to 20 N) in order to cope with various electronic components. The electronic component pressure welding apparatus of the present example has a desired adjustment by coarse adjustment by the first spring 11 and the first adjustment member 10 having a large spring constant and fine adjustment by the second spring 17 and the second adjustment member 16 having a small spring constant. It can be precisely adjusted to the initial load and can be set to any wide range of loads while moving a short distance.
[0026]
【The invention's effect】
According to the present invention, it is easy to set the initial load to a desired value, and it is possible to obtain an effect that a desired load can be applied with a short moving distance even when the electronic component is pressed. Measurement can be performed efficiently.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view seen from the front of an electronic component pressure welding apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view seen from the side of the electronic component pressure welding apparatus according to the embodiment of the present invention.
FIG. 3 is a front view showing a part of a conventional automatic measuring apparatus for inspecting / calibrating electronic components.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 2 ... Drive means 5 ... Accommodating part 6 ... Pressing body 10 ... 1st adjustment member 11 ... 1st spring 15 ... Transmission member 16 ... 2nd adjustment member 17 ... 2nd spring

Claims (2)

In the electronic component measuring apparatus for measuring the electrical characteristics of the electronic component by bringing the electronic component to be measured into pressure contact with the probe circuit with a predetermined load,
An accommodating portion (5) capable of moving up and down;
A pressing body (6) that is movably provided in the housing part, one end of which projects out of the housing part and presses the electronic component;
A first adjustment member (10) screwed so as to be movable relative to the housing portion;
A first spring that is provided between the pressing body and the first adjustment member inside the housing portion and adjusts a load applied to the pressing body according to a screwing amount of the first adjustment member into the housing portion. 11) and
A transmission member (15) movably provided inside the first adjustment member so that one end of the first adjustment member protrudes out of the first adjustment member and comes into contact with the pressing body;
A second adjustment member (16) screwed to be movable relative to the first adjustment member;
The first spring has a spring constant different from that of the first spring, and is provided between the transmission member and the second adjustment member inside the first adjustment member, so that the second adjustment member is screwed into the first adjustment member. A second spring (17) in which the load applied to the transmission member is adjusted according to
An electronic component measuring apparatus comprising driving means (2) for raising and lowering the housing portion in a direction in which the load is applied . By making the spring constant of the first spring larger than the spring constant of the second spring, the load for pressing the electronic component can be roughly adjusted by the first adjusting member, and finely adjusted by the second adjusting member. The electronic component measuring apparatus according to claim 1 .

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