JPH04107992A - Observation apparatus for electronic part - Google Patents

Abstract

PURPOSE:To make an observation apparatus possible to clearly observe silhouettes of electronic parts having various dimensions by changing a light projecting position to a light diffusion body in conformity with the dimensions of an electronic part. CONSTITUTION:To observe a small electronic part P1, a shutter 13 is moved down. In this state, light from a light source 11 is projected without being shut by the shutter 13 to an internal position (a) on a light diffusion body 6, the reflected light thereof passes through the side edge portion of the electronic part P1 and enters a camera 12, and the silhouette of the electronic part can be observed clearly. Further, in order to observe a large size electronic part P2, the shutter 13 is moved up. In this state, light from the light source 11 is partly shut off by the shutter 13 and projected to an external position/on the light diffusion body 6, and the reflected light thereof passes through the side edge portion of the electronic part P2 and enters the camera 12, thereby being able to observe the silhouette of the electronic part P2 clearly. Thus, an electronic part is observed by changing the light projecting position to the light diffusion body 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an electronic component observation device, and more specifically, it observes the silhouettes of electronic components of various sizes and sizes that are attracted to a transfer head. The present invention relates to a device for detecting the positional deviation.

(Conventional technology) IC, LSI, resistance chip. Japanese Unexamined Patent Publication No. 60-28298 discloses an apparatus for observing electronic components and detecting positional deviations during the transfer of electronic components such as capacitor chips onto a board by adsorption to a nozzle. Those described in are known.

As shown in FIG. 3, this device irradiates light from a light source 103 toward a light diffuser 102 provided on the base end side of a nozzle 101 of a transfer head 100, and the reflected light is sent to a camera 104. By making it incident on the electronic components PI, P2
The silhouette of the electronic component P is observed.
1. It has the advantage of being able to detect displacement of P2 while transferring it to the substrate.

(Problem to be Solved by the Invention) In the above means, the light emitted from the light source 103 is
When the reflected light hits the bottom surface of the electronic component and enters the camera 104, the electronic component shines brightly and its silhouette cannot be clearly observed. Therefore, the light source 103
It is necessary to prevent the light irradiated from the bottom surface of the electronic component from being irradiated onto the bottom surface of the electronic component.

However, the dimensions of electronic components vary in size, and each side is 1 m.
Since the following small items to larger items (2) or more are mounted on the board, when the light irradiation position is adjusted to the small electronic component PL, the light a will be transmitted to the large electronic component P2.
The light is reflected off the bottom surface of the large electronic component P2, making it impossible to clearly observe the large electronic component P2.
, the light beam is reflected from a part quite far away from the small electronic component P1, so the electronic component P1 is observed darkly, and there is a problem that its silhouette cannot be clearly observed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a means for clearly observing the silhouettes of electronic components of various sizes and sizes.

(Means for Solving the Problems) The present invention includes a light source that irradiates light toward a light diffuser provided on the base end side of a nozzle, and a camera that receives light reflected by the light diffuser. , and irradiation position changing means for changing the irradiation position of light from the light source to the light diffuser, forming an electronic component observation apparatus.

(Function) According to the above configuration, by changing the irradiation position of light on the light diffuser according to the dimensions of the electronic components, it is possible to clearly observe various large and small electronic components having different dimensions.

(Example 1) Next, the present invention will be described in detail with reference to the drawings.

FIGS. 1(a) and 1(b) show how a small electronic component P1 and a large electronic component P2 are observed. 1 is a main body of a transfer head A, and a nozzle part 3 is attached to a holder 2 that projects downward. The nozzle part 3 is composed of a mounting body 4 that is detachably attached to the holder 2, a nozzle 5, and a disc-shaped light diffuser 6 that protrudes outward in the shape of a brim from the base end of the nozzle 5. The electronic components PL and P2 are vacuum-adsorbed to the lower end of the nozzle 5.

B is an observation device, which includes a ring-shaped light source 11, a camera 12 provided below this light #11, and a ring-shaped light source 11;
It is composed of a cylindrical shutter 13 provided inside. A napht 14 is attached to the side of the shutter 13. 15 is a vertical feeder screwed into this napft 14, and 16 is a motor. Therefore, when the motor 16 is driven, the shutter 13 moves up and down to partially block the light emitted from the light source 11 toward the light diffuser 6, thereby changing the irradiation position of the light onto the light diffuser 6.

In FIG. 1(a), the shutter 13 is lowered to observe a small electronic component P1.

In this state, the light emitted from the light source 11 is irradiated onto the inner position A of the light diffuser 6 without being blocked by the shutter 13, and the reflected light passes through the side edge of the electronic component P1. The light enters the camera 12, and its silhouette can be clearly observed.

Further, in FIG. 1(b), the shutter 13 is raised in order to observe the large electronic component P2. In this state,
The light emitted from the light #11 is partially blocked by the shutter 13 and is emitted to the outer opening of the light diffuser 6, and the reflected light passes through the side edge of the electronic component P2 and reaches the camera. 12
, so its silhouette can be clearly observed.

In this way, by providing the shutter 13, which is an irradiation position changing means for changing the irradiation position of light on the light diffuser 6, and its lifting/lowering means 14, 15, 16, electronic components of various sizes can be clearly observed.

(Embodiment 2) In FIG. 2, the napht 14 is attached to the light source 11, and when the motor 16 is driven, the light source 11 moves up and down. Therefore, when observing a small electronic component P1, as shown in FIG. When observing a large electronic component P2, the light source 11 is raised to cause the light to enter the outer position opening, as shown in FIG. 2(b).

(Effects of the Invention) As explained above, the present invention includes a light source that irradiates light toward a light diffuser provided on the base end side of a nozzle, and a camera that receives light reflected by the light diffuser. and an irradiation position changing means for changing the irradiation position of the light from the light source to the light diffuser, making up an electronic component observation device, so that the silhouettes of electronic components of various sizes and sizes can be clearly observed. be able to.

11...Light source 12...Camera 13-1 Irradiation position changing means

Claims (1)

[Scope of Claim] A device for observing electronic components adsorbed by a nozzle of a transfer head, comprising: a light source that irradiates light toward a light diffuser provided on the base end side of the nozzle; 1. An electronic component observation device comprising: a camera that receives light reflected by a diffuser; and an irradiation position changing unit that changes the irradiation position of light from the light source to the light diffuser.