JPH0722932Y2 - CCD mounting device - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> In a conventional CCD mounting device, a lens barrel 2a equipped with an objective lens is integrally formed on a side surface of an outer casing 1a so as to project as shown in FIG.
An aluminum die-cast holder 10a accommodating and holding a CCD element 8 is attached to a portion of the outer casing 1a facing the lens barrel 2a, and the CCD element 8 is provided on the lens barrel 2a side of the holder 10a. Adjacent the crystal filter 6 through the rubber ring 7 for dust prevention between
The crystal filter 6 is attached to the holder 10a of the CCD element by a retainer 4a covering the outer periphery thereof, and the back surface of the holder 10a, that is, C
The lead terminals 9 and 9 of the CCD element 8 which is supported on the side opposite to the mounting surface of the CD element and which is inserted and projected to the back side through the notch hole 12a of the retainer 10a are connected to the printed board 14. It will be done.

<Problems to be solved by the invention> However, in the above-mentioned conventional example, the CCD element is housed in the retainer in advance, and the quartz filter is sequentially assembled to the other side of the CCD element through the rubber ring for dust protection to form a unit. In addition, since this was attached to the base end of the lens barrel, workability was poor, and the peripheral side of the CCD element and its front surface were covered with die-cast retainers and restraints with large heat capacity, so heat dissipation The effect is poor, and there is a drawback that the number of parts is large and the cost is high due to the use of an independent die-cast CCD element holder.

Therefore, the present invention aims to improve productivity by reducing the number of parts, prevent static electricity from occurring, and eliminate the influence of static electricity and heat on the CCD element by adopting a structure with a good heat dissipation effect. It is a thing.

<Means for Solving the Problems> In the CCD mounting device of the present invention, a small-diameter cylindrical portion formed at the base end portion of a lens barrel equipped with an objective lens is attached to the front surface of an outer casing, The crystal filter is inserted and held in the cylindrical portion, the CCD element is contacted to the rear peripheral edge of the crystal filter via the rubber ring, and the entire rear side surface of the CCD element is attached to the outer casing. It is pressed and held by a flat support plate.

<Operation> According to the CCD mounting device of the present invention, the cylindrical portion of the lens barrel is attached to the front surface of the outer casing, the crystal filter is inserted and held in the cylindrical portion, and the rear side peripheral portion of the crystal filter is attached. It is possible to assemble by a procedure in which a rubber ring is applied to contact the CCD element, and then the entire rear side surface of the CCD element is pressed and held by a flat support plate. That is, on the tubular portion of the lens barrel attached to the outer casing, from the front side of the outer casing, the crystal filter, the rubber ring,
Since the CCD element and the support plate can be attached in sequence, the time required for assembly work can be shortened.

The CCD element is elastically sandwiched between the support plate with the CCD element attached to the outer casing and the crystal filter at the base end of the lens barrel attached to the front surface of the outer casing. The heat radiation effect is enhanced by exposing it to.

<Examples> The following will describe the examples in detail with reference to the examples shown in the drawings. As shown in Figs. 1 to 3, a lens barrel 2 equipped with an objective lens (not shown) has a small diameter at its base end. Tubular part 4
And a crystal filter 6 is fitted and held in the hole 3 of the tubular portion 4, and the base end surface of the barrel 2 is screwed with screws 15, 15, ...
Is screwed onto the front surface of the outer casing 1 made of sheet metal by the cylindrical portion 4
In a portion of the outer casing 1 facing the inside of the outer casing 1, a support plate 10 which is fixed between the opposite walls of the outer casing 1 by screws 16 and 16 and a rubber ring 7 which covers the rear peripheral portion of the crystal filter 6. The CCD element 8 is elastically interposed and held between. That is, according to the CCD mounting apparatus of the present invention, the tubular portion 4 of the lens barrel 2 is attached to the front surface of the outer casing 1, and the crystal filter 6 is inserted and held in the tubular portion 4, and the crystal filter 6 is attached. After assembling the rubber ring 7 to the rear side peripheral edge portion to contact the CCD element 8, the entire rear side surface of the CCD element 8 can be assembled by pressing and holding the flat support plate 10. And
The lead terminals 9, 9 of the CCD element are extended and protruded rearward from the notch openings 12, 12 formed in the upper and lower parts of the support plate to form the support plate 1.
The lead terminals 9 and 9 are connected to a printed circuit board 14 which is fixedly supported by screws 18 and 18 on the support substrate with a protruding portion 11 formed on the back surface of 0 interposed therebetween. Further, the CCD element 8 is not only elastically sandwiched by the support plate 10 and the rubber ring 7 on the crystal filter 6, but also has projections 5 and 5 protruding from a part of the end edge of the tubular portion 4. The CCD element is held immovably by being fitted in the receiving hole formed on the CCD element 8.

The support plate 10 is attached to the lens barrel 2 with screws 17, 17.

According to the present invention, the crystal filter 6, the rubber ring 7, the CCD element 8, and the support plate 10 are sequentially arranged from the front side of the outer casing 1 on the cylindrical portion 4 of the lens barrel 2 attached to the outer casing 1 as described above. Since it can be installed, the time required for assembly work is shortened. In addition, since the CCD element is largely exposed to the outside air, the heat transmitted through the lens barrel can be efficiently dissipated into the atmosphere, and the heat on the support plate is reliably attached to the outer casing. The outer casing acts as a heat radiating plate and locally supports the printed circuit board by the protrusions on the support plate, so that heat on the support plate is hard to be transmitted to the printed circuit board and the temperature rise of the printed circuit board is suppressed.

Then, by directly attaching the support plate to the outer casing and grounding it, the electrostatic potential of the metal member around the CCD element is prevented from rising and the influence of static electricity on the CCD element is eliminated.

<Effect of device> Since the device of the present invention is configured as described above, it can be assembled by the steps of the outer casing, the crystal filter, the rubber ring, the CCD element and the support plate, and the work time can be shortened. By integrally forming a tubular portion for holding the lens barrel base end of the opposing lens, and by making the lens barrel and the outer casing separate,
The outer casing can be made of sheet metal and can be used as a ground member.

By attaching the CCD element and the support plate of the printed circuit board to the outer casing, static electricity and heat can be efficiently diffused, the performance is stabilized, and the simple structure can reduce the cost. It is a device with high practical value that can be done.

[Brief description of drawings]

 1 to 3 show an embodiment of the present invention. FIG. 1 is a side view of a central longitudinal section of an essential part, FIG. 2 is a left side view of the same as above, and FIG. FIG. 4 is a cross-sectional view taken along the line X, and FIG. 1 ... Outer casing, 2 ... Lens barrel 4 ... Cylindrical part, 6 ... Crystal filter 7 ... Dust-proof rubber ring, 8 ... CCD element 10 ... Support plate, 11 ... Projection part

Claims (1)

[Scope of utility model registration request] 1. A small-diameter tubular portion formed at a base end portion of a lens barrel equipped with an objective lens is attached to a front surface of an outer casing, and a quartz filter is inserted and held in the tubular portion, and the quartz crystal The CCD element is opposed to the rear peripheral edge of the filter via a rubber ring, and the entire rear side surface of the CCD element is pressed and held by a flat plate-shaped support plate attached to the outer casing. Characteristic CCD mounting device.