JPH0599826A - Liquid type thermal shock tester - Google Patents

Abstract

PURPOSE:To improve an interior illuminator in a liquid type thermal shock tester to be of excellent visibility. CONSTITUTION:A sample basket moving device 1 disposed inside a hermetically- closed casing 2 of a liquid type thermal shock tester is constructed of a moving stage 3 shuttling between the upper part of a high-temperature tank 9 and the upper part of a low-temperature tank 10 and of an elevating stage 4 moving in an elevating manner in relation to the moving stage 3. A sample basket 13 is suspended from the lower part of the elevating stage 4, while an illuminator 14 is fitted to the lower side edge of the moving stage 3 or the upper side edge of the elevating stage 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid thermal shock test device which is a device for testing the characteristics of electric and electronic parts against heat stress, and more particularly to improvement of a lighting device inside the device.

[0002]

2. Description of the Related Art The liquid thermal shock test apparatus described above generally has a high temperature tank and a low temperature tank in the lower portion of a closed casing and a sample basket moving device in the upper portion of the closed casing. The electric and electronic parts as a sample are housed in a sample basket, and alternately immersed in a high temperature tank and a low temperature tank through the sample basket moving device to test the characteristics against thermal shock.

In one test, for example, after exposing to a high temperature tank for 5 minutes, it is transferred to the low temperature tank for about 10 seconds, and then exposed to the low temperature tank for 5 minutes again to make one cycle, which is continued for 15 cycles. And so on. The state of the sample during the test can be observed through an observation window provided on the front surface of the closed casing, and an illumination device is provided in the closed casing for the purpose of facilitating observation at this time (Tabay Espec liquid tank). See the thermal shock shock device catalog).

[0004]

However, the conventional illuminating device is fixed to the middle or end of the upper part of the closed casing, and only one illuminating device is provided. Depending on the position of the sample basket, the sample can be observed. There was often a lack of lighting, which was a problem. In addition, with such lighting, when the test worker leaves the device even slightly, it becomes impossible to confirm not only the state of the sample but also the operation status of the sample basket moving device. Therefore, whether or not the test is normally continued. There was also the problem that it was easy to understand, and it was difficult to understand.

In order to solve the above-mentioned problems, the present invention aims to solve the above-mentioned problems by making the illuminating device in the liquid thermal shock test device always provide sufficient illumination to the sample. is there.

[0006]

Means for Solving the Problems That is, according to the present invention, which is adapted to the above-mentioned object, an observation window is provided on the front surface of a closed casing, a high temperature tank and a low temperature tank are provided in the lower part of the closed casing, and a sample is provided on the upper part of the closed casing. In a liquid thermal shock test device having a sample basket moving device for alternately immersing a sample placed in a basket in the high temperature tank and the low temperature tank, in the claim 1, the sample basket moving device is provided in the upper part of the high temperature tank. And a lower part of the elevating table, and a moving table that moves back and forth between
While the sample basket is hung vertically, an illuminating device is installed on the lower side edge of the moving table on the observation window side. In the case of claim 2, the illuminating device is installed at the upper side edge of the lift table on the observation window side.

[0007]

According to the present invention, since the illuminating device is provided in the sample basket moving device, the illuminating device moves together with the movement of the sample basket to constantly illuminate the sample under test.
Therefore, the test operator can fully observe the state of the sample inside through the observation window. In that case, in the invention described in claim 1, the illumination device only reciprocates above the high temperature tank and the low temperature tank to contribute to the irradiation of the sample, but in the case of the invention described in claim 2, In addition, since the illuminator moves up and down together with the sample, the movement of the illuminator allows you to see the movement of the sample almost reliably even if you are far away, and properly understand the operating status of the sample basket moving device. It will be possible.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the inside of the liquid thermal shock test device of the present invention, and FIG. 2 is a perspective view of the main part. In these figures, a sample basket moving device (1) includes a moving table (3) that reciprocates left and right in an upper part of a closed casing (2), and a lifting table (4) that moves up and down with respect to the moving table (3). It consists of

As a moving mechanism of the moving table (3), a ball screw bearing (5) having an internal thread engraved on its inner periphery is fixed to one end of the moving table (3). , A ball screw (6) laterally installed at a required length above the closed casing (2), and by rotating the ball screw (6) forward and backward, the moving base (3) is moved through the ball screw bearing (5). A mechanism that reciprocates left and right is adopted. Note that (M ₁ ) is a reversible motor that rotates the ball screw (6) forward and backward.

On the other hand, in the lifting table (4), a reversible motor (M ₂ ) is mounted on the moving table (3), and a pulley (7) mounted on the rotary shaft of the motor (M ₂ ). ) Is wound with a winding wire (8), and this winding wire (8)
An elevating table (4) is suspended from the lower end of the motor, and the motor (M ₂ ) is rotated up and down to move up and down.

The lifting table (5) also serves as a lid for the two high temperature tanks (9) and the low temperature tanks (10) provided side by side in the lower part of the closed casing, and therefore, the tank (9 or 10). It has an edge part (11) which is wider than the opening, and when the elevator (4) descends with respect to the tank (9 or 10), the central part of the elevator (4) is the tank (9 or It covers the upper surface of 10) so that the rim (11) engages around the tank (9 or 10) and stops.

Further, with respect to the lift table (4), a wire (12) of a required length is hung on the lower part thereof, and a sample basket (13) is fixed to the lower end of the wire (12),
When the lift table (4) is stopped by covering the upper surface of the tank (9 or 10) as described above, the sample basket (13) is placed in each tank (9 or 1).
It is adapted to be immersed in the high temperature heat transfer fluid (9 ') or the low temperature heat transfer fluid (10') stored in 0). Needless to say, the sample basket (13) is a basket that accommodates samples such as electric and electronic components, and has a gap enough to observe the state of the sample inside from the outside of the basket. In addition, although not shown, there is a sample observation window on the front side of the closed casing (2), and the sample basket (1
The state of the sample in 3) can be observed through this observation window.

In the liquid thermal shock test device having the above-mentioned structure, the lighting device (14) is provided below the movable table (3) on the front side of the closed casing (2), that is, on the side edge facing the observation window. ) Is attached with screws. The illuminating device (14) is preferably a fluorescent lamp from the viewpoint of life, and a tube-shaped fluorescent lamp is mounted over the entire length of the lower side edge of the moving table (3).

In that case, even if the lifting table (4) is lifted until it comes into contact with the moving table (3), the edge portion (11) of the lifting table (4) does not hit the lighting device (14). If there is a possibility that the lower surface of the moving table (3) is narrow and there is a risk of this, as shown in Fig. 2, the moving table (3) is attached to the lower side edge to the front side of the closed casing (2). The locking metal fitting (15) to be taken out is fixed, and the lighting fixture (14) is attached to the locking metal fitting (15).

The structure of the liquid thermal shock test apparatus of the present invention is as described above, and its operation will be described below. Note that the following operations are all sequentially controlled by a known control device.

First, the ball screw (6) is rotated by the rotation of the motor (M ₁ ) in a predetermined direction, and the movable table (3) is accompanied by the rotation of the ball screw (6) to the upper portion of the high temperature tank (9). Then, the motor (M ₂ ) rotates in a predetermined direction to lower the elevating table (4), and the sample basket (13) is immersed in the heat medium liquid for high temperature (9 ′). FIG. 1 shows this state. Then, when the immersion for a predetermined time, for example, 5 minutes is completed, the motor (M ₂ ) rotates in the opposite direction to the above-mentioned case, the lifting table (4) and the sample basket (13) are pulled up, and then the motor ( M ₁₎ is also rotated in the opposite direction to the said mobile platform (3) is moved to the top of cryostat (10) rotates the further motor (M ₂₎ is predetermined direction again Then, the elevating table (4) is lowered to immerse the sample basket (13) in the low temperature heat transfer liquid (10 '). During this period, it is actually about 10 seconds, for example.

In this way, the both tanks (9, 10) are immersed in the heat medium liquid (9 ', 10').
The cycle is repeated to complete one test, and the lighting device (14) is turned on during the test operation period.
Then, it reciprocates along the movable table (3) in the upper part of the closed casing (2) and continues to irradiate the sample in the sample basket (13) located below the movable table (3). Therefore, the test operator who observes through the observation window can always observe the state of the sample with sufficient illuminance no matter where the sample is located.

The configuration of the present invention is not limited to the above, and the illumination device (14) may be attached to the upper side edge of the lifting table (4).

That is, this is the invention described in claim 2,
As shown in FIG. 3, the lighting device (14) is attached to the upper side edge of the lifting table (4) facing the front of the closed casing (2). In this case, the illuminating device (14) is arranged so that the illuminating device (14) can sufficiently illuminate the sample basket (13).
Is attached by slightly projecting it from the side edge of the lifting table (4) edge (11).

Further, even if the lift table (4) rises toward the movable table (3), the lighting device (14) is stopped with an interval left so as not to contact the lower portion of the movable table (3). It is also necessary to control. When the above-described test operation is performed by such a configuration, during that time, the illumination device (14) moves not only during the left and right reciprocating movements of the sample basket (13) but also during the raising and lowering operation of the sample basket (14). The sample basket (13) is moved along with it and irradiation of the sample basket (13) is continued.
As a result, not only the test operator can easily confirm the state of the sample, but also by relying on the light of the illumination device (14), the position of the sample can be confirmed over substantially the entire area from a considerable distance. As a result, the operating condition of the sample basket moving device (1) can be properly understood.

[0021]

As described above, according to the present invention, in the liquid thermal shock test device, the sample basket moving device is provided with the illuminating device for irradiating the sample basket. Among the elements constituting the sample basket moving device, the illuminating device is arranged on the lower side edge of the moving table that reciprocates on the observation window side, and in the invention according to claim 2, the illuminating device is the element constituting the sample basket moving device. Among them, since they are attached to the upper side edges of the observation window side of the lifting platform that moves up and down respectively as described above, it is possible to check the state of the sample moving by the sample basket moving device with sufficient illuminance in any case. Become.

Further, in any case, the movement of the sample can be clearly understood by confirming the movement of the light of the illuminating device from a distance, which facilitates the visual confirmation of the operating state of the sample basket moving device. However, this effect is particularly remarkable in the case of claim 2 in which the illumination device moves up and down together with the sample basket.

[Brief description of drawings]

FIG. 1 is a front view illustrating the inside of a liquid thermal shock test apparatus according to the present invention.

FIG. 2 is a perspective view of a main part of the liquid thermal shock test device according to the present invention.

FIG. 3 is an essential part explanatory view showing another embodiment of the liquid thermal shock test apparatus according to the present invention.

[Explanation of symbols]

 (1) Sample basket moving device (2) Closed casing (3) Moving table (4) Lifting table (9) High temperature tank (10) Low temperature tank (13) Sample basket (14) Lighting device

Claims (2)

[Claims] 1. An observation window is provided on the front surface of the closed casing (2),
Further, a high temperature tank (9) and a low temperature tank (10) are provided in the lower part of the closed casing (2), and a sample contained in a sample basket (13) is provided in the upper part of the closed casing (2) with the high temperature tank (9).
And a liquid thermal shock test device having a sample basket moving device (1) for alternately immersing in a low temperature tank (10),
A moving table (3) that reciprocates the sample basket moving device (1) between the upper part of the high temperature tank (9) and the upper part of the low temperature tank (10).
And a lifting table (4) that moves up and down with respect to the moving table (3)
And a sample basket (1
3) The liquid thermal shock test device, wherein the illuminating device (14) is installed on the lower side edge of the movable table (3) on the observation window side while vertically arranging (3). 2. An observation window is provided on the front surface of the closed casing (2),
Further, a high temperature tank (9) and a low temperature tank (10) are provided in the lower part of the closed casing (2), and a sample contained in a sample basket (13) is provided in the upper part of the closed casing (2) with the high temperature tank (9).
And a liquid thermal shock test device having a sample basket moving device (1) for alternately immersing in a low temperature tank (10),
A moving table (3) that reciprocates the sample basket moving device (1) between the upper part of the high temperature tank (9) and the upper part of the low temperature tank (10).
And a lifting table (4) that moves up and down with respect to the moving table (3)
And a sample basket (1
3) The liquid type thermal shock test device, characterized in that the lighting device (14) is installed on the upper side edge of the lifting table (4) on the observation window side while vertically arranging the same.