JP3993614B2 - Test fixture - Google Patents

Description

  The present invention relates to a test fixture that holds a lead in contact with a conductor in order to measure electrical characteristics of an electronic device from which a plurality of leads are derived.

  To measure the electrical characteristics of an electronic device, connect a signal generator that provides a measurement signal to the electronic device and a signal processor that measures the signal output from the electronic device to leads that are external terminals of the electronic device. Must. Therefore, a test fixture (inspection jig) for holding the electronic device in a predetermined position and bringing the conductor of the measurement substrate connected to the signal generation unit or the signal processing unit into contact with the lead of the electronic device to conduct. Is used.

  For example, as shown in FIG. 7, an electronic device measuring jig disclosed in Patent Document 1 below places an electronic device 100 on which a plurality of leads 101 are disposed on an insulating device support 102, and this device. A plurality of leads 101 in two rows are held in a plurality of grooves 103 respectively formed on a pair of side surfaces of the support 102. Then, the two measurement substrates 104 and 104 are arranged outside the lead 101 so that the lead 101 of the electronic device 100 and the conductor pattern 105 of the measurement substrate 104 are parallel, and the two blocks 106 and 106 are used for measurement. The blocks 104 are arranged so as to be movable on the outside of the substrates 104 and 104, and the conductor pattern 105 is pressed against the leads 101 by this block 106 to achieve conduction.

  However, in the electronic device measuring jig as described above, since the lead 101 has a relatively short configuration as shown in FIG. 7, the conductor pattern 105 is pressed against the lead 101 to cause bending, misalignment, etc. The deformation can be corrected and the lead 101 can be correctly brought into contact with the conductor pattern 105. For example, when the lead is formed in a long and narrow bar shape, the deformed lead is sufficiently connected to the conductor pattern even if the entire lead is pressed. There was no contact.

Accordingly, the inventors of the present application have considered a test fixture in which only the leading end portion of the lead is brought into contact with a conductor such as a conductor pattern to conduct. In this test fixture, a lead is disposed at a predetermined position on a substrate on which a conductor is provided, and the tip of the lead is brought into contact with the conductor. At this time, matching is performed so that the characteristic impedance in the portion other than the tip portion of the arranged lead becomes a predetermined value. Then, by pressing the entire lead with pressing means having an integral block structure, the bending of the lead is corrected and the lead is held at the correct position, and the tip of the lead is brought into contact with the conductor.
JP 2004-198303 A

  However, in the test fixture as described above, the pressing for positioning the lead while correcting the bending of the lead and the pressing for bringing the lead into contact with the conductor are simultaneously performed by one pressing means. Could not be controlled individually. In addition, it is difficult to adjust the contact pressure when the lead contacts the conductor. As a result, for example, the lead may be positioned in a state in which the lead is in contact with the conductor with a strong force. In this case, excessive physical stress is generated on the conductor, or the lead is placed on the conductor. The conductor could be damaged. In addition, for example, when the lead is in contact with the conductor with a strong force before the lead is positioned, the lead is fixed at the contact portion due to the frictional force generated between the lead and the conductor. In some cases, the electrical characteristics of the electronic device cannot be measured accurately.

  In addition, in order to accurately measure electronic devices while preventing excessive physical stress on the conductors provided in the test fixture, the contact pressure when the lead contacts the conductor is optimized for each electronic device to be inspected. In the past, this adjustment work took time.

  Therefore, the present invention has been made in view of the above situation, and it is possible to control the timing of each pressing by dividing the pressing for correcting and positioning the lead and the pressing for bringing the lead into contact with the conductor. It is possible to easily adjust the contact pressure with the structure, and as a result, it is possible to suppress the damage to the conductor, to realize a long life, and to provide a test fixture for reliably contacting the lead with the conductor. The purpose is to reduce the time required for adjustment work during assembly and to reduce the cost by improving workability in the inspection process of the electronic device.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The test fixture 1 according to claim 1 of the present invention is a test fixture 1 in which the lead 3 is brought into contact with a conductor in order to measure electrical characteristics of the electronic device 2 in which a plurality of leads 3 are led out from one end face. And
A holder plate 16 that is inserted between the leads 3, protrudes a part of the tip 3 a of the lead 3, and has grooves 17 into which the leads 3 are inserted along the longitudinal direction;
A transmission line L having conductor lines 14 and 15 that are in contact with the leads 3 and lead out electrical signals of the electronic device 2 to the external connector 8;
A first pressing member 20 that presses the lead 3 so as to hold it in the groove 17 of the holder plate 16;
A second pressing member 25 that presses the leading end 3a of the lead 3 against the conductor lines 14 and 15;
A pressing means 30 for pressing the first pressing member 20 and the second pressing member 25;
The pressing means 30 is configured to press the second pressing member 25 with a time difference after pressing the first pressing member 20.

  The test fixture 1 according to claim 2 is configured such that the first pressing member 20 and the second pressing member 25 are relatively movable.

In the test fixture 1 according to claim 3, the pressing means 30 includes a first pressing portion 32 that presses the first pressing member 20 and a second pressing portion 33 that presses the second pressing member 25. And
The first pressing portion 32 and the second pressing portion 33 are movable, respectively.

  The test fixture 1 according to claim 4 is characterized in that a pressing force adjusting means is provided on at least one of the second pressing member 25 and the second pressing portion 33.

  In the test fixture 1 according to claim 5, the second pressing member 25 includes a non-contact lead 3 </ b> B other than a lead that contacts the conductor lines 14 and 15 of the transmission line L among the plurality of leads 3. A lead escape portion 29 into which the distal end portion 3b is inserted is provided to prevent the pressing operation of the second pressing member 25 from being obstructed by the non-contact lead 3B.

  According to the test fixture of the present invention, it is possible to individually control the timing of pressing the tip of the lead by the first pressing member and the timing of pressing the tip of the lead by the second pressing member. This lead can be held in a predetermined position while correcting the bending of the lead, and then the tip of the lead can be brought into contact with the conductor line (conductor). Thereby, the lead can be reliably brought into contact with the conductor line at a predetermined position. In addition, since the contact pressure when the lead contacts the conductor line can be adjusted, physical stress generated in the conductor can be reduced, and damage to the conductor line can be suppressed. Thereby, the lifetime extension of a conductor is realizable.

  Furthermore, since the contact pressure can be easily adjusted, the time required for the adjustment work during assembly can be shortened. As a result, the workability in the inspection process is improved, and the cost can be reduced.

Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of a test fixture according to the present invention, FIG. 2 is a side view of the embodiment, and FIG. 3 is an exploded perspective view from above showing a main part of the embodiment. 4 is an exploded perspective view showing the main part of the embodiment from below, FIG. 5 is a bottom view showing the main part of the embodiment, and FIGS. 6A and 6B are main parts of the embodiment. It is a sectional side view which shows this operation | movement.

  The test fixture 1 according to the present embodiment holds the electronic device 2 from the lead 3 for the purpose of measuring the electrical characteristics of the electronic device 2 in which a plurality of leads 3 are led out substantially vertically from one end surface. It is an instrument (jig) used for deriving an electrical signal to the external connector 8. In FIG. 2, the pressing members 20 and 25 are pressed from the rear side of the test fixture 1 to move to the right in the drawing in the horizontal direction (a pressing direction described later), and the lead 3 is connected to the conductor lines 14 and 15 (see FIG. 5). ).

  As shown in FIGS. 1, 3, and 4, the test fixture 1 includes, as main components, a main body 4, a transmission line L, a holder plate 16, a first pressing member 20, and a second pressing member. A member 25 and a pressing means 30 are provided.

  As shown in FIGS. 1 and 2, the main body 4 is screwed via a leg portion 7 on a base base 6 provided with handles 5 and 5 on both sides. The main body 4 is made of a conductor such as metal, and plays a role of grounding (GND) an electric signal of first and second transmission lines described later. Further, an external connector 8 that is a connection terminal for external connection is provided on the front end surface 4a of the main body 4 (refers to a front surface with respect to the moving direction of the pressing members 20 and 25). In the present embodiment, two external connectors 8 are provided. Furthermore, connection holes 9 to which a connecting shaft described later is connected are provided on both sides of the rear end surface 4b of the main body 4 (referred to as a rear surface with respect to the moving direction of the pressing members 20 and 25). A transmission line L is formed in the main body 4.

  The transmission line L is substantially composed of a first transmission line 10 and a second transmission line 12.

  As shown in FIGS. 3 and 6, the first transmission line 10 includes the main body 4 (GND), a substrate portion 11 made of an insulator disposed on the rear end surface 4 b of the main body 4, and the substrate portion 11. And the lead 3 of the electronic device 2 arranged in the above. In the first transmission line 10, the characteristic impedance from the lead 3 to the main body 4 is matched to a predetermined value (about 50Ω). In the present embodiment, the substrate portion 11 is formed of Teflon (registered trademark).

  As shown in FIGS. 4, 5, and 6, the second transmission line 12 is substantially the same as the main body 4 (GND) and the substrate portion 11 constituting the first transmission line 10 on the lower surface 4 c of the main body 4. The substrate part 11 is disposed on the substrate part 11 and the end part is close to the substrate part 13 and is formed on the surface of the substrate part 13, and an electric signal from the electronic device 2 is sent to the external connector 8. And a conductor pattern 14 as a conductor line to be led out. In the present embodiment, the substrate portion 13 is formed of Teflon (registered trademark) in the same manner as the substrate portion 11 of the first transmission line 10 described above. The conductor pattern 14 is formed of a thin metal layer such as a copper foil.

  Furthermore, a contact member 15 made of a conductive material such as gold is provided at the end of the main body 4 on the rear end face 4b side on the conductor pattern 14 of the second transmission line 12. The contact member 15 forms a conductor line of the second transmission line 12 together with the conductor pattern 14, and has a substantially L shape in which a contact surface with the lead 2 extends to the substrate portion 11 of the first transmission line 10. Is formed.

  As shown in FIGS. 3 to 5, the holder plate 16 is inserted between the leads 3, and grooves 17 for inserting the leads 3 in the diameter direction are formed on both surfaces along the leads 3. The electronic device 2 is held on the holder plate 16 by inserting the leads 3 along the grooves 17. The cross-sectional shape of the groove 17 is substantially U-shaped, and the depth thereof is formed such that the lead 3 having a circular cross section can be accommodated in the diameter direction. By inserting each lead 3 into the groove 17, deformation such as bending is easily corrected, and thereafter, the lead 3 is further appropriately corrected by a first pressing member described later. The cross-sectional shape of the groove 17 is not limited to a U-shape, and may be, for example, a V-shape, a U-shape, or the like. In addition, the holder plate 16 projects a part of the tip 3 a of each lead 3 from one end face while holding the electronic device 2. Further, knobs 18 are provided at both end portions above the holder plate 16.

  The first pressing member 20 described above is formed in a substantially rectangular block shape having a notch 21 in the lower portion, as shown in FIGS. The first pressing member 20 is provided with insertion holes 22 penetrating in the pressing direction X (arrow line direction in FIG. 2) described above on both sides. Further, the above-described connecting shaft 23 inserted and connected to the connection hole 9 of the main body 4 is inserted into the insertion hole 22, and the first pressing member 20 is connected to the main body 4 so as to be movable in the pressing direction X. Furthermore, a through hole 24 is provided in the lower center of the first pressing member 20 so as to penetrate from the inner surface of the notch 21 in the pressing direction. In the present embodiment, the first pressing member is formed of an insulator such as Teflon (registered trademark).

  2-5, the 2nd press means 25 is formed in the substantially rectangular block shape, and is arrange | positioned inside the notch 21 of the said 1st press member 20. As shown in FIG. A substantially cylindrical penetrating shaft 26 projects from the rear end surface of the second pressing member 25 (refers to the rear surface with respect to the moving direction of the second pressing member 25). Further, a flange 27 is provided on the rear end surface of the through shaft 26 (referred to as a rear surface with respect to the moving direction of the second pressing member 25). The second pressing member 25 is connected to the first pressing member 20 so as to be relatively movable in the pressing direction X when the through shaft 26 is inserted into the through hole 24 of the first pressing member 20. Yes. A return spring 28 is disposed around the axis of the through shaft 26 between the rear end surface 4 b of the main body 4 and the flange 27, and the second pressing member 25 is rear side (see FIG. 2, it is pulled to the right in the drawing with respect to the pressing direction X. Further, as shown in FIG. 5, the second pressing member 25 is penetrated in the vertical direction, and the rear of the plurality of (four) leads 3 while holding the holder portion 16 (electronic device 2). A lead relief portion 29 is provided through which the tip portion 3b of the non-contact lead 3B that is disposed on the side and does not contact the contact member 15 is inserted. The lead relief portion 29 is formed with an inner diameter that does not contact the non-contact lead 3B even when the second pressing member 25 moves in the pressing direction X. In the present embodiment, the lead escape portion 29 is formed as a through hole. However, the present invention is not limited to this. For example, the lead escape portion 29 may be a recess having a depth that does not contact the tip portion 3b of the non-contact lead 3B. . Moreover, in this Embodiment, the 2nd press means 25 is formed with insulators, such as a Teflon (trademark) similarly to the above-mentioned 1st press member 20. As shown in FIG.

  As shown in FIG. 1, the pressing means 30 is roughly constituted by a pressing portion 31 and an operation portion 38.

  As shown in FIGS. 1 to 4, the pressing portion 31 is generally configured by two upper and lower plungers 32 and 33 serving as first and second pressing portions whose longitudinal direction faces the pressing direction X. These upper and lower plungers 32, 33 are connected up and down by a connecting plate 34. The upper plunger 32 presses the first pressing member 20 in the pressing direction X, and the lower plunger 33 presses the second pressing member 25 in the pressing direction X. In addition, a spring (not shown) as a pressing force adjusting means for pressing the pressing members 20 and 25 with an optimal pressing force is built in the tip portions of the upper and lower plungers 32 and 33. Further, a connecting shaft 37 is coaxially extended at the rear end of the upper plunger 32, and the rear end portion of the connecting shaft 37 is connected to a link shaft of an operation unit described later.

  As shown in FIGS. 1 and 2, one end of the operation lever 41 is supported by the support member 40 protruding from the base 39. The operating lever 41 is interlocked and connected to the connecting shaft 37 via the link shaft 42 described above, and the operating shaft 41 is operated to move the connecting shaft 37 in the pressing direction X.

Next, the operation of the test fixture 1 according to the present embodiment will be described.
In order to hold the electronic device 2 to be inspected on the test fixture 1, first, the holder plate 16 is slid and inserted from the tip 3 a of the lead 3 between the leads 3 of the electronic device 2. 3 is arranged in each groove 17. As a result, the lead 3 is held along the groove 16 with the tip 3 a protruding from one end surface of the holder plate 16.

  Next, as shown in FIGS. 1 and 2, the holder plate 16 on which the electronic device 2 is mounted is inserted between the rear end surface 4 b of the main body 4 and the first pressing member 20 from above. At this time, as shown in FIG. 5, the tip 3 b of the non-contact lead 3 </ b> B disposed on the rear side in the pressing direction X among the plurality of leads 3 is inserted into the lead escape portion 29 of the second pressing member 25. .

  Next, by operating (pushing down) the operation lever 41 of the operation unit 38, the connecting shaft 37 moves to the front side in the pressing direction X (in FIG. 2, the right side in the drawing with respect to the pressing direction). 33 moves to the front side in the pressing direction X. Thereby, the upper and lower plungers 32 and 33 press the first and second pressing members 20 and 25, respectively. Here, although the upper and lower plungers 32 and 33 will be described in an upper and lower arrangement, they may be arranged in a positional relationship other than the upper and lower according to the arrangement and shape of the first and second pressing members 20 and 25.

  Here, the pressing operation of the first and second pressing members 20, 25 by the upper and lower plungers 32, 33 will be described with reference to FIG.

  First, as shown in FIG. 6 (a), the upper and lower plungers 32, 33 are moved in front of the pressing direction X by pushing down the operating lever 41 (see FIGS. 1 and 2). First, pressing of the first pressing member 20 by the upper plunger 32 starts. At this time, the entire lead 3 of the electronic device 2 is pressed into the groove 17 of the holder plate 16, and deformation such as bending of the lead 3 that cannot be corrected simply by being inserted into the groove 17 is corrected. Is held in place.

  Next, as shown in FIG. 6B, when the pressing of the first pressing member 20 by the upper plunger 32 is finished, the pressing of the second pressing member 25 (flange 27) by the lower plunger 33 starts. At this time, the tip 3 a of the lead 3 held at a predetermined position is pressed against the contact member 15 of the second transmission line 12, and the tip 3 a of the lead 3 contacts the contact member 15. Further, the non-contact lead 3B of the electronic device 2 is inserted into the lead escape portion 29, so that the non-contact lead 3B prevents the movement even if the second pressing member 25 moves in the pressing direction X. Is preventing. Further, the second pressing member 25 is pressed with an optimal pressing force by a spring (not shown) built in the lower plunger 33. Thereby, the contact pressure when the tip portion 3a of the lead 3 contacts the contact member 15 is optimized.

  Thus, the pressing of the first and second pressing members 20 and 25 by the upper and lower plungers 32 and 33 is completed. When the holder plate 16 with the electronic device 2 attached is removed from the test fixture 1, the holding of the holder plate 16 is released simply by pushing up the operation lever 41.

  The lead 3 of the electronic device 2 is disposed at a predetermined position on the substrate unit 11 and constitutes a first transmission line 10 whose characteristic impedance is matched to a predetermined value, and the tip 3a of the lead 3 is the second transmission line. 12 (contact member 15) is surely contacted.

  According to the test fixture 1 according to this embodiment, the timing of pressing the tip 3 a other than the tip 3 a of the lead 3 by the first pressing member 20 and the timing of pressing the tip 3 a of the lead 3 by the second pressing member 25. Since it can be controlled individually, the lead 3 can be held at a predetermined position while correcting the bending of the lead 3, and then the tip 3 a of the lead 3 can be brought into contact with the contact member 15. Thereby, the lead 3 can be reliably brought into contact with the contact member 15. In addition, since the contact pressure when the lead 3 contacts the contact member 15 can be optimally adjusted, physical stress generated in the contact member 15 can be reduced, and damage to the contact member 15 can be suppressed. be able to. Thereby, the lifetime improvement of the contact member 15 (conductor) is realizable.

  Furthermore, by pressing the second pressing member 25 with the optimal pressing force by the lower plunger 33, it becomes easy to optimally adjust the contact pressure when the lead 3 contacts the contact member 15 as described above. Thus, the time required for the adjustment work during assembly can be shortened. As a result, the workability in the inspection process is improved, and the cost can be reduced.

  Further, when the second pressing member 25 presses the tip 3 a of the lead 3 against the contact member 15, the second pressing member 25 avoids the non-contact lead 3 </ b> B disposed behind the pressing direction X among the plurality of leads 3. It becomes possible to do.

  In the above-described embodiment, when the tip 3a of the lead 3 is brought into contact with the contact member 15, the spring as the pressing force adjusting means for optimally adjusting the pressing force applied to the second pressing means 25 is the lower part. Although it is set as the structure provided in the plunger 33 side, it is good also as a structure provided in the 2nd press means 25 side. As a result, as in the above-described embodiment, an effect is obtained that it is easy to optimally adjust the contact pressure when the tip 3a of the lead 3 contacts the contact member 15 of the second transmission line 12. It is done.

  In the above-described embodiment, the groove 17 for holding the lead 3 of the electronic device 2 is formed in the holder plate 16. However, the groove is formed at a predetermined position in the substrate portion 11 of the first transmission line 10. The lead 3 may be held in the groove. Thereby, in addition to the effect that the bending of the lead 3 is corrected, as in the above-described embodiment, the lead 3 can be positioned more accurately.

It is a perspective view which shows one Embodiment of the test fixture by this invention. It is a side view which shows the same embodiment. It is a disassembled perspective view which shows the principal part of the embodiment. It is a disassembled perspective view which shows the principal part of the embodiment. It is a bottom view which shows the principal part of the embodiment. (A) It is a sectional side view which shows operation | movement of the principal part of the embodiment. (B) It is a sectional side view which shows operation | movement of the principal part of the embodiment. It is a schematic perspective view which shows the structure of the principal part of the conventional test fixture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Test fixture 2 ... Electronic device 3 ... Lead 3B ... Non-contact lead 3a, 3b ... Tip part 8 ... External connector 14, 15 ... Conductor pattern and contact member as conductor line 16 ... Holder plate 17 ... Groove 20 ... First DESCRIPTION OF SYMBOLS 1 Press member 25 ... 2nd press member 29 ... Lead escape part 30 ... Press means 32 ... Upper plunger as 1st press part 33 ... Lower plunger as 2nd press part L ... Transmission line

Claims (5)

A test fixture (1) for bringing the lead into contact with a conductor in order to measure electrical characteristics of an electronic device (2) in which a plurality of leads (3) are led out from one end surface,
A holder plate (16) having a groove (17) inserted between the leads and projecting a part of the tip (3a) of the lead and inserting each lead along the longitudinal direction;
A transmission line (L) having conductor lines (14, 15) in contact with the leads to lead out electrical signals of the electronic device to an external connector (8);
A first pressing member (20) for pressing the lead so as to be held in the groove of the holder plate;
A second pressing member (25) for pressing the tip of the lead against the conductor line;
Pressing means (30) for pressing the first pressing member and the second pressing member;
A test fixture, wherein the pressing means presses the second pressing member with a time difference after pressing the first pressing member.   The test fixture according to claim 1, wherein the first pressing member (20) and the second pressing member (25) are configured to be relatively movable. The pressing means (30) includes a first pressing portion (32) that presses the first pressing member (20), and a second pressing portion (33) that presses the second pressing member (25). With
The test fixture according to claim 1, wherein the first pressing portion and the second pressing portion are movable.   4. The test fixture according to claim 1, wherein a pressing force adjusting means is provided in at least one of the second pressing member and the second pressing portion. .   The second pressing member (25) includes a tip of a non-contact lead (3B) other than the lead that contacts the conductor line (14, 15) of the transmission line (L) among the plurality of leads (3). The lead escape portion (29) into which the portion (3b) is inserted is provided to prevent the pressing operation of the second pressing member from being obstructed by the non-contact lead. The test fixture according to any one of the above.

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