JPH02203282A - Inspection device for package component - Google Patents

Abstract

PURPOSE:To detect whether or not there is a component by lowering an inspection head, provided with component detection parts, on a substrate to be inspected, and detecting the on-off states of the switch parts of the component detection parts while correcting the component position by the component detection parts. CONSTITUTION:When the inspection head 1 is lowered on the substrate 3 to be inspected which is positioned, the position of the component 4 is corrected by the tapered guide part 21a of a position correction hole 21 if shifting. When the head 1 is further lowered to its final position, a component detection pin 22 is pressed up by the component 4 where the component 4 is mounted and a conductive rubber sheet 14 contacts copper foil 12 to turn on a switch part 23, but when the component 4 is not mounted, the switch part 23 is still off. Here, a measurement voltage E is applied between the head 1 and the series circuit of a measurement part 2 to switch respective switch parts 23 in order, and then a voltmeter V deflects only where the component 4 is on the substrate 3, thereby deciding whether or not there is the component 4.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an apparatus suitable for inspecting components mounted on a printed circuit board, particularly chip components.

Conventional technology In conventional equipment for inspecting components mounted on printed circuit boards, the board is positioned using an X-Y table. It is detected by converting and image processing.

<Problem to be solved by the invention> Since the board is moved using an It turned out to be expensive.

The present invention has been made in consideration of this point, and has been made with the object of obtaining an inexpensive inspection device that can determine the presence or absence of parts in a short period of time.

Means for Solving the Problems> In order to achieve the above object, the inspection device of the present invention has the following features:
The present invention includes an inspection head in which a plurality of component detection sections are provided corresponding to respective component positions on a board to be inspected, and a side cap connected to this inspection head. The component detection section of the inspection head includes a position correction hole having a tapered guide section;
It is equipped with a component detection pin that is held with its tip protruding into this position correction hole, and a switch section that is activated by pushing the component detection pin, and the operating state of the switch section of this inspection head is detected by the side adjustment hole. It is configured to do so.

Effect> When the inspection head is lowered onto the printed circuit board on which the component is mounted, the misalignment of the component is corrected by the positive hole in the component detection section, and the component pushes the component detection pin to operate the switch section. By sequentially detecting the operating state of this switch section on the side, it is possible to determine whether a component is mounted at a predetermined location.

<Example> Next, one embodiment shown in the drawings will be described.

FIG. 1 is a cross-sectional view of the inspection head with the inspection head lowered onto the board to be inspected, FIG. 2 is a circuit diagram of the device, and FIG. 3 is an explanatory diagram of the position correction effect by the position correction hole of the component detection section. 2 is an inspection head, 2 is a side cap, 3 is a board to be inspected, and 4 is a component mounted on the board to be inspected 3. 4a indicates adhesive No. 6.

The inspection head 1 includes a printed circuit board 11 for inspection, which has a copper foil 12 provided at a position corresponding to each component 4 of a board 3 to be inspected.
A conductive rubber sheath 14, a binholg 15, and a position correction plate 16 are laminated in this order via a spacer 13, and a component detection section 5 is formed at the position where each fiMW 12 is provided. This component detection section 5 is located at position 'f1
Position correction hole 21 provided in correction plate 16, this position correction hole 2
The component detection pin 22 is held by a pin holder 15 with its tip protruding from the tip 1, a conductive rubber sheet 14, and a copper foil 12.
1a is formed, and the name tone Wi12 and the conductive rubber sheet 1 are formed.
4 forms a switch ff1s23.

The side terminal 2 is equipped with a current detection section 25 consisting of a resistor R and a voltmeter, and as shown in figure t52, the current detection section 25 is connected in parallel with the conductive rubber sheet 14 as a common electrode. By sequentially connecting to a plurality of switch sections 23, the conduction state of each switch section 23 can be detected individually.

Incidentally, in order to easily switch the connection, an appropriate changeover switch may be built-in.

This embodiment has the above-mentioned configuration, and when the inspection head 1 is lowered onto the positioned substrate 3 to be inspected, if there is any misalignment of the component 4, the position will be changed as shown in FIG. ! ! The position is corrected by the tapered guide portion 21m of the correction hole 21. Further, when the inspection head 1 is lowered to the final position, ff1
As shown in the figure, where the component 4 is attached, the component detection pin 22 is pushed up by the component 4, the conductive rubber sheet 14 comes into contact with the flange foil 12, and the switch section 23 is turned on. If not, the switch section 23 remains off.

Therefore, as shown in FIG. 2, when the measurement voltage E is applied to the series circuit of the inspection lead 1 and the side fixed capital 2 and each switch section 23 is sequentially switched, if there is a component 4 on the board 3 to be inspected. Since the voltmeter V swings when the component 4 is not present, the voltmeter V does not fluctuate when the component 4 is not present. Therefore, the presence or absence of the component 4 can be determined.

Note that the length and thickness of the component detection pin 22 must be appropriately selected depending on the component 4 to be detected, but this method can be used if the component 4 is a chip component with little difference in shape or size. This makes the apparatus of the present invention particularly suitable for inspecting chip components.

<Effects of the Invention> As is clear from the above-described embodiments, the present invention is capable of lowering an inspection head provided with a plurality of component detection sections onto a board to be inspected, and detecting the component while correcting the component position using the component detection sections. The presence or absence of parts is detected by turning on and off the switch part of the part.

Therefore, the presence or absence of components on the board to be inspected on which components are mounted can be determined in a short time, and any slight misalignment of the component with the equipment is automatically corrected, reducing the work time required to correct the position. Since the presence or absence of a component is detected not indirectly but by direct contact between the component and the switch, it is easy to make accurate judgments. be.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main parts of an inspection head according to an embodiment of the present invention that has been lowered onto a board to be inspected, Fig. 2 is a circuit diagram, and Fig. 3 is a position correction action by a component detection section. This is an explanatory drawing. DESCRIPTION OF SYMBOLS 1... Inspection head, 2... Side fixed capital 3... Board to be inspected, 4... Component 5... Component detection part
, 12... #1rfi14... conductive rubber sheet,
21st place 1! flli hole 21a...Tapered guide part, 22...Component detection pin, 23...Switch part Z
5... Current detection section

Claims (1)

[Claims] 1. A component detection unit that includes a position adjustment hole having a tapered guide hole, a component detection pin held with its tip protruding into the position adjustment hole, and a switch unit that is activated by pushing the component detection pin is connected to the board to be inspected. 1. An inspection device for mounted components, comprising: a plurality of inspection heads provided corresponding to each component position; and a side fixed head for detecting the operating state of the switch section of the inspection head.