JPH10260229A - Structure of test head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cooling efficiency with the use of a small fan and mount a test board of a small retention space, by fitting a mount bearing to a notch of a fixed ring thereby mounting the test board to a test head and utilizing a central cylindrical part as a discharge path for a cooling wind. SOLUTION: A rotary shaft 4 fitted in a central cylindrical part 1A is rotated by a rotary lever 5, so that a mount bearing 6 set at the rotary shaft 4 is fitted in a notch of a fixed ring 3. The ring 3 is pulled downward to be engaged with a stopper 9. A test board 2 is consequently mounted to a test head 1. Since the notch is formed in a circumferential direction of the ring 3, the ring 3 can be small, enabling the test board 2 of a small retention space to be fitted. A cooling wind 21 from a Silocco fan 17A is taken inside through a suction opening 1B, introduced into the central cylindrical part 1A from an air opening 1AA and discharged through a discharge opening 1C. A control plate is eliminated and an air resistance becomes small, whereby the test head can be cooled efficiently with the small fan 17A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test board which uses a small fan to improve the cooling efficiency and uses a small storage space, in particular, by utilizing the structure of a test head, in particular, a central cylindrical portion as an exhaust path for cooling air. The present invention relates to a structure of a test head which can be mounted.

[0002]

2. Description of the Related Art The structure of a conventional test head is, for example, as follows.
The configuration shown in FIG. 6 is provided.

In FIG. 6A, the right side shows a state before the test board 2 is mounted, and the left side shows a state after the test board 2 is mounted.

[0004] A central cylindrical portion 1A is provided in the test head 1, and pin cards 14 are radially arranged around the central cylindrical portion 1A, for example, at intervals of about 5 °.

[0005] An air cylinder 11 is attached to the inner wall of the central cylindrical portion 1A by a block 13, and a hook 12 is provided on a piston rod 11A of the air cylinder 11.

The air cylinder 11 in the initial state (FIG. 6)
When (B)) is operated, the hook 12 rotates 90 ° (FIG. 6 (C)) and then descends (FIG. 6 (D)).

Conversely, the hook 12 in the lowered state (FIG. 6)
(D)) (FIG. 6 (C)) and rotate in the opposite direction, the air cylinder 11 returns to the initial state (FIG. 6).
(A)).

[0008] A fixing ring 31 is attached to the lower surface of the test board 2.
As shown in (A), a hook portion 31B is formed.

Therefore, first, with the air cylinder 11 in the initial state (FIG. 6B), the test board 2 to which the fixing ring 31 is attached is placed on the test head 1 from above the central cylindrical portion 1A (FIG. 6B). 6 (A) right).

When the air cylinder 11 is actuated in this state, the hook 12 rotates 90 ° (FIG. 6C), enters the hook portion 31B of the fixing ring 31, and then descends (FIG. 6 (C)). D)), and pull down the fixing ring 31 to mount the test board 2 (FIG. 6 (A)).
To the left).

On the other hand, on the outer periphery of the test head 1, FIG.
As shown in (A), the inlet 1B is provided uniformly, and the backboard 20 is provided with a bottom outlet 1D.

An exhaust port 1C is provided below the backboard 20, for example, as shown on the right side of FIG. 6A. A duct hose 16 is joined to the exhaust port 1C. A fan box 17 having a built-in sirocco fan 17A is provided at the tip.

Further, a control board 15 is provided on the back board 20 on the exhaust port 1C side.

With this configuration, when the sirocco fan 17A is operated, the cooling air 21 taken in from the left intake port 1B in FIG. 6A is exhausted from outside the central cylindrical portion 1A through the bottom exhaust port 1D. Enter duct 1C and duct hose 16
Exhausted through.

The cooling air 21 taken in from the intake port 1B on the right side of FIG. 6 (A) passes through the bottom exhaust port 1D partially blocked by the control plate 15, enters the exhaust port 1C, and enters the duct. Air is exhausted through the hose 16.

As described above, by operating the sirocco fan 17A to suck and exhaust the heat of the test head 1 by the cooling air 21 taken in from the air inlet 1B, uniform cooling is performed.

[0017]

The above-mentioned prior art has the following problems.

(1) The cooling efficiency cannot be improved unless a control plate and a larger fan are used.

In the prior art (FIG. 6), three to four air cylinders 11 are arranged in the central cylindrical portion 1A, and the test board 2 is pulled as parallel as possible.

Therefore, since the air cylinder 11 hinders the flow of air, the central cylindrical portion 1A cannot be used as an exhaust path for the cooling air 21.

For this reason, a bottom exhaust port 1D is provided on the backboard 20 on which the pin cards 14 are arranged, and an exhaust port 1C is provided below the backboard 20.

However, when air is exhausted from the exhaust port 1C, the air volume on the exhaust port 1C side (right side in FIG. 6) increases, and each pin card 1
4 was not able to be uniformly cooled, and a control plate 15 having a role of a resistor for adjusting the air volume was provided.

That is, in FIG. 6, the pin card 14 near the exhaust port 1C has a smaller air resistance and the cooling air 21 flows more easily. Therefore, a part of the bottom exhaust port 1D provided on the back board 20 on the side of the pin card 14 close to the exhaust port 1C is prevented by the control plate 15, and the pin cards 14 arranged radially are cooled by increasing air resistance. The flow of the cooling air 21 must be uniform.

Since the cooling efficiency is reduced by providing such a control plate 15, the fan box 17 has a large sirocco fan 17A capable of obtaining a high static pressure and a large air flow.
In order to improve the cooling efficiency.

(2) The storage space for the mounted test board is large. Test board 2 mounted on test head 1
Must be changed for each device type to be measured.

For this purpose, the test board 2 is stored in a predetermined place for each product type, and the test board 2 is detached and replaced by the operation of the air cylinder 11.

However, the fixing ring 31 attached to the conventional test board 2 is large, so that a large storage space is required. That is, the hook portion 31B is formed in the fixing ring 31 to be long in the Y-axis direction, and the height is increased accordingly, so that the fixing ring 31 eventually becomes large.

An object of the present invention is to provide a structure of a test head capable of mounting a test board having a small storage space while improving the cooling efficiency by using a smaller fan.

[0029]

According to the present invention, as shown in FIGS. 1 to 5, a pin card 14 is radially arranged at a predetermined interval around a central cylindrical portion 1A. In the structure of the test head, a rotary shaft 4 rotatably mounted in the central cylindrical portion 1A and provided with a mounting bearing 6, and a notch 3
A test board 2 is formed on the test head 1 so that the mounting bearing 6 of the rotary shaft 4 is inserted into the notch 3A. An intake port (1B) is provided on the outer periphery of the test head (1). An air hole (1AA) is provided on a side surface of the central cylindrical portion (1A), and an exhaust port (1C) is provided immediately below the central cylindrical portion (1A). The test board 2 into the test head 1 by pressing down the fixing ring 3.
And the cooling air 2 taken in from the intake port 1B
1 is discharged through the air hole 1AA, the central cylindrical portion 1A, and the exhaust port 1C.

Therefore, according to the present invention, the control plate 15 (FIG. 6) is used by using the central cylindrical portion 1A equidistant from each pin card 14 as an exhaust path for the cooling air 21.
The cooling efficiency can be improved even with a smaller fan without providing the mounting shaft 6 and the mounting bearing 6 is fitted into the notch 3A by rotating the rotating shaft 4, so that the notch 3A
Are formed in the circumferential direction of the fixing ring 3, the height is reduced by that amount, the fixing ring 3 is also reduced, and the storage space for the test board 2 can be reduced.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings according to embodiments. FIG. 1 is an overall view showing an embodiment of the present invention, wherein 1 is a test head, 2 is a test board, 3 is a fixing ring, 4 is a rotating shaft, 5 is a rotating lever, 6 is a mounting bearing, and 7 is a rotating ring. Bearing, 8
Is a pin, 9 is a stopper, 10 is a support, 14 is a pin card, 16 is a duct hose, and 17 is a fan box.

Around the central cylindrical portion 1A of the test head 1, pin cards 14 are radially arranged on the back board 20 at predetermined intervals, and a test board 2 described later is provided with a pogo pin 18 and a cable on each pin card 14. Device connected to the test board 2 and connected to the test board 2 (not shown)
Is measured.

A rotating shaft 4 is rotatably mounted in the central cylindrical portion 1A.

A bowl-shaped part 4A is provided on the upper part of the rotating shaft 4, and a mounting bearing 6 is provided on the bowl-shaped part 4A.
A stopper 9 is attached to the top 1AB (FIG. 2), and is locked when a test board 2 described later is mounted (FIGS. 1, 2, and 3).

For example, four mounting bearings 6 are provided, and the test board 2 is mounted by being fitted into a notch 3A formed in a fixing ring 3 of the test board 2 described later.

The lower portion of the bowl-shaped portion 4A below the mounting bearing 6 is supported by a rotating bearing 7 provided on the central cylindrical portion 1A.

On the other hand, a lower portion of the rotating shaft 4 is supported by a support 10 via a pin 8, and a rotating lever 5 is attached to a lower portion of the rotating shaft 4, and the rotating lever 5 protrudes from the central cylindrical portion 1A and the test head. 1 (FIG. 1).

With this configuration, it is possible to prevent the lateral movement of the rotary shaft 4 when the rotary lever 5 is operated to rotate the rotary shaft 4.

FIG. 4 is a detailed view of the test board 2 constituting the present invention.

A fixing ring 3 is attached to the lower surface of the test board 2 as shown in the figure.

For example, four notches 3A corresponding to the above-described mounting bearings 6 are formed in the fixing ring 3 in the circumferential direction, and each notch 3A has an insertion portion 3AB and a tapered portion 3A.
A is provided.

When the test board 2 is placed on the test head 1 from above the central cylindrical portion 1A (arrow A in FIG. 2), the mounting bearing 6 is inserted into the insertion portion 3AB of the notch 3A (FIG. 5 (A)). )).

At this time, the lower end 6 of the mounting bearing 6
A (FIG. 5A), the lowermost 3AA1 of the tapered portion 3AA
(FIG. 5 (A)) and the tapered portion 3A
A is separated by X between the lowest 3AA1 and the highest 3AA2 of A.

In this state, when the rotating shaft 4 is rotated clockwise from outside the test head 1 while holding the rotating lever 5 in the hand (arrow B in FIGS. 2 and 3), the rotating shaft 4 is provided on the bowl-shaped portion 4A. The mounting bearing 6 is also rotated clockwise to make the tapered portion 3A.
Rolling while interfering with A (left side in FIG. 5 (B)), and further fitting down to the inside of the notch 3A as shown, pulls the fixing ring 3 downward by X.

Since the fixing ring 3 and the test board 2 are fixed, the test board 2 is also pulled at the same time, and the fixing ring 3 is locked by the stopper 9 (FIGS. 1 and 2).
The test board 2 is mounted on the test head 1.

At this time, as shown in FIG. 1, the test board 2 comes into contact with a spring contact called a pogo pin 18 and maintains an electrical and mechanical contact state by the spring pressure of the pogo pin 18. As a result, the pogo pins 18 are electrically connected to the inside of the pin card 14 through the cable 19, and the test board 2 is connected to the main body of the test apparatus via the pin card 14, so that the device can be mounted and measured.

On the other hand, as shown in FIG.
Take in.

The side of the central cylindrical portion 1A has an air hole 1
AA is provided, and an exhaust port 1C is provided immediately below the support 10 provided at the bottom of the central cylindrical portion 1A.

A duct hose 16 is joined to the exhaust port 1C, and a fan box 17 containing a sirocco fan 17A is provided at the tip of the duct hose 16.

With this configuration, when the sirocco fan 17A is operated, the cooling air 21 is taken in from the intake port 1B, and the cooling air 21 passes through the air hole 1AA and the central cylindrical portion 1A.
After entering A, it descends along the rotating shaft 4 and is discharged through the exhaust port 1C and the duct hose 16.

In this case, since the central cylindrical portion 1A is used as an exhaust path for the cooling air 21, the central cylindrical portion 1A serves as a large air chamber (air pool), and is located at an equal distance from the central cylindrical portion 1A. The air resistance of the pin card 14 becomes uniform.

Therefore, it is not necessary to use the control plate 15 (FIG. 6) for adjusting the flow rate of the cooling air 21 and the air resistance of the entire test head 1 is reduced, so that the sucked sirocco fan 17A is smaller. Even if a test head is used, the cooling efficiency of the test head 1 is improved.

Hereinafter, the operation of the present invention having the above configuration will be described.

(1) Operation when the Test Board 2 is Mounted on the Test Head 1 First, the test board 2 is mounted on the test head 1 from above the central cylindrical portion 1A (arrow A in FIG. 2). The mounting bearing 6 is inserted into the notch 3A (FIG. 5).
(A)).

In this state, the rotating lever 5 is operated to rotate the rotating shaft 4 clockwise, and the mounting bearing 6 is rolled while interfering with the tapered portion 3AA of the cutout portion 3A. By fitting (FIG. 5 (B)), the fixing ring 3 is pulled downward to be locked by the stopper 9, and the test board 2 is mounted on the test head 1.

In this case, the notch 3A into which the mounting bearing 6 is fitted is formed in the circumferential direction of the fixed ring 3, and the fixed ring 3 is smaller.

Therefore, a test board 2 having a small storage space can be mounted on the test head 1.

(2) Cooling Function of Test Head 1 When the sirocco fan 17A is operated, the cooling air 21 is taken in from the intake port 1B, passes through the air hole 1AA on the side surface of the central cylindrical portion 1A, and flows into the central cylindrical portion 1A. And descends along the rotating shaft 4 and is discharged through the exhaust port 1C and the duct hose 16.

As described above, the cooling air 21 is applied to the central cylindrical portion 1A.
Since the control plate 15 (FIG. 6) is not used and the air resistance is reduced by using the exhaust passage, cooling can be efficiently performed by using the smaller sirocco fan 17A.

(3) Operation when detaching the test board 2 from the test head 1 When replacing the test board 2, the test board 2 is detached from the test head 1 as follows.

That is, in the state shown in FIG.
Is operated to rotate the rotating shaft 4 counterclockwise (arrow C in FIGS. 2 and 3), the notch 3A formed in the fixing ring 3 is formed.
The mounting bearing 6 fitted in the back of the
(B)), it rolls in the opposite direction while interfering with the tapered portion 3AA and returns to the position of the insertion portion 3AB (FIG. 5 (A)).

As a result, since the fixing ring 3 is released from the mounting bearing 6, the test board 2 can be detached from the test head 1 by pulling the test board 2 upward from the central cylindrical portion 1A.

The test board 2 detached from the test head 1 has a small fixing ring 3 as described above.
Can be stored in a smaller space.

[0064]

As described above, according to the present invention, the rotating shaft having the mounting bearing is mounted in the central cylindrical portion by using the central cylindrical portion as an exhaust path for the cooling air, and the mounting bearing is mounted. The test board is mounted on the test head by fitting into the notch formed in the fixing ring, and the cooling air taken in from the intake port provided on the outer periphery of the test head is provided on the side surface of the central cylindrical portion with an air hole, By configuring the test head to exhaust through the central cylindrical part and the exhaust port provided directly below the central cylindrical part, the cooling efficiency is improved using a smaller fan, and a test board with a small storage space can be used. This has the effect of providing a test head structure that can be mounted.

Further, there is an effect that the mounting mechanism of the test board is further simplified, and the cost is accordingly reduced.

[0066]

[Brief description of the drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between a test head 1 and a test board 2 constituting the present invention.

FIG. 3 is a detailed view of a test head 1 constituting the present invention.

FIG. 4 is a detailed view of a test board 2 constituting the present invention.

FIG. 5 is an explanatory view of a mounting operation of the test board 2 according to the present invention.

FIG. 6 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Test head 1A Central cylindrical part 1AA Air hole 1B Intake port 1C Exhaust port 2 Test board 3 Fixing ring 3A Notch part 3AA Taper part 3AB Insertion part 4 Rotation shaft 5 Rotation lever 6 Mounting bearing 7 Rotation bearing 8 Pin 9 Stopper 10 Support 11 Air Cylinder 12 Hook 13 Block 14 Pin Card 15 Control Board 16 Duct Hose 17 Fan Box 17A Sirocco Fan 18 Pogo Pin 19 Cable 20 Backboard

Claims (3)

[Claims] 1. A test head structure in which pin cards (14) are radially arranged at predetermined intervals around a central cylindrical portion (1A), wherein the pin cards (14) are rotatably mounted in the central cylindrical portion (1A). ,
A notch (3A) is formed in the rotating shaft (4) provided with the mounting bearing (6) and the fixing ring (3), and the mounting bearing (6) of the rotating shaft (4) is notched (3A). )
A test board (2) mounted on the test head (1) so as to be inserted into the test head (1). An air inlet (1B) is provided on the outer periphery of the test head (1), and a wind hole (1AA) is provided on a side surface of the central cylindrical portion (1A). ) Are provided directly below the central cylindrical portion (1A) with exhaust ports (1C), and by rotating the rotating shaft (4), the mounting bearing (6) is fitted into the notch (3A), and the fixing ring ( 3)
Press down the test board (2) to test head (1)
And a cooling head (21) taken in from an intake port (1B) and discharged through an air hole (1AA), a central cylindrical portion (1A), and an exhaust port (1C). . 2. The structure of a test head according to claim 1, wherein a bowl-shaped portion (4A) is provided at an upper portion of the rotating shaft (4), and a rotating lever (5) is provided at a lower portion. 3. A mounting bearing (6) is provided on a bowl-shaped portion (4A) of the rotating shaft (4), and the bowl-shaped portion (4A) is provided.
A), the lower part of the mounting bearing (6) is supported by a rotating bearing (7) provided in the central cylindrical part (1A), and the lower part of the rotating shaft (4) is via a pin (8). The structure of a test head according to claim 2, supported by a support (10).