JPS60214167A - Television camera - Google Patents

Abstract

PURPOSE:To attain miniaturization and to lower cost by adopting a fixed focus to a lens fitted to a lens seat, moving an image pickup tube freely in axial direction and providing a position adjusting means at the outer circumference in front of the lens seat. CONSTITUTION:A deflection coil unit 1 is pressed in the direction of the lens seat 5 by a coil spring 3 while the lens seat 5 and a chassis 4 are incorporated by a screw 12. Thus, a projection 2 provided to the deflection coil unit 1 jumps out of a window 8 in the direction of the lens 6. In this state, when an adjusting ring 11 is screwed to a screw part 9 of the lens seat 5, the ring 11 contacts the projection 2 and then the ring 11 moves the deflection coil unit 1 together with the built-in image pickup tube against the elastic force of the coil spring 3 backward. Thus, the image pickup tube is moved back and forth the lens 6 by adjusting the adjusting ring 11 to attain back focus and adjustment of distance.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a television camera for surveillance.

Conventional structure and its problems Conventionally, when this type of television camera, that is, a camera using an image pickup tube, has a lens section and a head section, the lens section has a means for adjusting the focal length with respect to the subject, and the head section has a means for adjusting the focal length with respect to the subject. It has an electric circuit including an image pickup tube, and is provided with bank focus means at the rear or bottom of the head.

However, in this case, a focal length mechanism in the lens section is an essential requirement, and the bank focus means is located at a different position from the axis of the image pickup tube, making the configuration more complex, but overall miniaturization and lower cost. had a limit.

OBJECTS OF THE INVENTION It is an object of the present invention to eliminate such drawbacks and to provide an excellent television camera that is small and can be manufactured at low cost.

Structure of the Invention The present invention provides a lens attached to a lens section with a fixed focus, an image pickup tube that is movable in the axial direction, and a means for adjusting the position of the image pickup tube provided on the front outer periphery of the lens section. With this, back focus or focal length adjustment can be performed.

DESCRIPTION OF EMBODIMENTS The following will explain one embodiment of the present invention with reference to the drawings. 1 is a deflection coil unit, and 03 is a deflection coil unit with a protrusion 2 on the outer circumference of the tip 1.
ノ [Spring, 4: 1-shaped, -1, -A, is not shown in the figure, or is provided separately / 3-10 case, while the downward spring is attached, the support Equivalently, the mela fitting is fixed to J, which is configured as Jt. 5?: Lv, /
Suza te b = : / Su 6 no Tori + part 7 k i = i-J-Z
, On the other hand, the protrusion 4- provided on the fJiri coil unit 1
Window 8 from which E 2 protrudes. The adjustment link 11 is screwed together, 7 parts 9 S/LIL, 443 people are passed through the small hole 10, and 7.? It is fixed at 74.

In the case of Jin, the focal length of 7: ; can be the focal length + i + lc adjustment f, but the focal length is 1 # 11 character missing / l
It may be 7'. That is, in the case of this embodiment, 1! The key 5 and /key 4 are integrated by the wire 12, and in the above state, the coil spring 3 is used to deflect the coil! Sea Shininoto 1 (not shown, but the same Koilyu = y
The image pickup tube is also fixed inside the t□ l.
,/is pressurized in the direction of the dial seat 5. 7 but 1. Then, the protruding piece 2 provided on the deflection carp A's throat 1 is closer to the window 8 than the window 8 T.
The loosened range jumps out in the direction of Takeshi 7/S 6. 2・ri1
1 hits J12, and eventually the same lick 11 also hits ~1
, resist the force of lever 7 + spring 3, deflect the bullet, ) By adjusting the link river 1, the deflection 11 Irny r, ・1・1 built in A
- Shooting 1' ball 1t: 1, sea: 2. '6 (/i two vs. 7 to 11 in the land direction Sugiku υ-1, a) one to Ni,
(Second, with h...Kunohka λ, or (
-Jt,: K distance adjustment is fl. Even if it is a weak thing with a mechanism, it has a buff of 22 Focus and a Focus; 7 [(
+i; Fl adjustment should be possible and the cost pattern of the lens system should be good.

Moreover, the movement of the image pickup tube is for external use of the laser beam, so the workability is good and the structure is simple. In addition, the cross-sectional shape of the lens seat is made into a σ↑ shape so that the ten case and the lower case can be removed. Alternatively, you may use a solid-state image sensor stand and move the image sensor back and forth by rotating the L MIG for adjustment.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main part of the JJ menu according to an embodiment of the present invention, and Fig. 2 is a perspective view of the main part of the JJ menu. 3 Corf... not,
1//-1->, 5 shi/su part, 0 shi7・'su, 1.
18 Rounds - 1) G. Daimisakito's name −jP↓ψto Naka 111 Masa Male 1 person or 1 person Figure 1

Claims (1)

[Scope of Claims] (]) A part of the mounting member of the image sensor is made to be able to protrude freely with respect to the lens portion to which the lens is attached, and meshes with the lens portion to adjust the position of the image sensor, and A television camera equipped with an adjustment ring for adjusting focal length including focus. (2) The television camera according to claim 1, wherein the lens is of a fixed focus type. Levi camera.