JPH0529014U - Lens focus switching adjustment mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] In CCTV cameras, etc. with interchangeable lenses,
Adjust the focus of lenses with different fixed focal lengths. [Structure] A substrate 4 on which a solid-state image sensor 3 is mounted is mounted on one end, and a J-shaped focus switching groove 5 and a fixing screw hole 6 are formed on a side body near the other end.
Is provided, and a fine adjustment ring 10 having an oblique fine adjustment groove 11 and a fixing screw tightening hole 13 is provided on the side body so as to cover the outside of the J-shaped focus switching groove 5, and the focus switching guide pin 8 is provided inside. The lens holder 7 that is to be attached is inserted, the focus switching guide pin 8 is attached to the lens holder 7 through the fine adjustment groove 11 and the U-shaped focus switching groove 5, and the fixing screw 12 is fixed to the fixing screw. Tighten in hole 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a CCTV camera or the like with interchangeable lenses, and relates to a mechanism for switching without using an adapter because different fixed focus lenses are used.

[0002]

[Prior Art]

 Conventional CCTV cameras used for surveillance use fixed focus lenses with different focal lengths, so as shown in Fig. 2, they are generally convex and have the same screw 15 as the camera mount 14 inside diameter. A substrate on which the adapter 16 formed to have an outer diameter is screwed into the camera mount 14 of the lens holder 7, the lens 17 is further screwed into the adapter 16, and finally the solid-state image sensor 3 is mounted. 4 is not shown in the figure, a method of finely moving it with a cam to adjust the focus, or although not shown in the figure, the adapter 17 is not screwed into the lens holder 7 and the lens 17 is directly attached. A method of adjusting the focus by moving the substrate 4 on which the solid-state image pickup device 3 is mounted and focused is moved back and forth and in parallel by a two-stage cam for parent and child.

[0003]

[Problems to be solved by the device]

 As described above, there are a method of using the conversion adapter and a method of changing the position of the solid-state image sensor. Generally, the method of using the conversion adapter is used, and the conversion adapter is grasped when screwed. There is a problem in that the outer barrel is knurled for ease of use and it is expensive, and because it is removed when the lens is replaced, it cannot be replaced due to loss. Whichever method is used, it is necessary to move the substrate on which the solid-state image sensor is mounted by using a cam or the like to make fine adjustments. It was a difficult method to move the image sensor surface in parallel without horizontal and vertical displacement because the mechanism became complicated.

[0004]

In order to solve the above problems, a substrate having a solid-state image sensor mounted on one end of a cylinder is attached such that the center of the solid-state image sensor coincides with the cylinder axis, and the side close to the other end. A switching ring with a substantially J-shaped focal point switching groove and a fixing screw hole is provided with a collar at one end of the cylinder so that a focus switching guide pin can be attached to the side barrel. While being inserted, a cylindrical fine adjustment ring with a diagonal fine adjustment groove and a fixing screw tightening hole formed on the side body was attached to cover the J-shaped focus switching groove and slide and rotate at the same position. , A focus switching guide pin is attached to the lens holder through the fine adjustment groove and the J-shaped focus switching groove, and a focusing screw is fixed through the fixing screw tightening hole to fix the lens holder. Len characterized by Providing focus switching adjusting mechanism.

[0005]

[Action]

 As described above, the solid-state image sensor is fixed to one end of the cylindrical switching ring, the J-shaped focus switching groove and the fixing screw hole are provided on the side body near the other end, and the cylinder is covered to cover this part. Fit a lens holder that is fitted with a fine adjustment ring that has a slanted fine adjustment groove and a fixing screw tightening hole on the side barrel so that it slides and rotates at the same position, and that a focus switching guide pin is attached. By inserting the focus switching guide pin into the lens holder through the fine adjustment groove and the J-shaped focus switching groove, the lens can be replaced without changing the solid-state image sensor, which is difficult to move in parallel, and the lens can be replaced. The holder can be moved along the J-shaped focus switching groove, and the fine adjustment ring can be rotated to bring the focus into full focus, and the fixing screw can be tightened to fix the switching ring and the lens holder to the operating state.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view of an embodiment of a lens focus switching adjusting mechanism according to the present invention, and FIG. 2 is a side view including a partial cross section at the time of assembly thereof.

In the figure, reference numeral 1 is a cylindrical switching ring, and a substrate 4 on which a solid-state image sensor 3 is mounted via an element holder 2 at one end is provided with a central axis of the switching ring 1 and a solid-state image sensor 3. The structure is such that the centers of the are aligned. Further, the side body near the other end is provided with a J-shaped focus switching groove 5 of which one is short and the other is long, and a screw hole 6 for fixing the lens holder 7. Reference numeral 7 is a lens holder having a cylindrical one end with a flange and a pin mounting screw hole 9 for attaching the focus switching guide pin 8 to the side body. The lens holder 7 is inserted into the other end of the switching ring 1 so as to be slidably rotated. Has become. Reference numeral 10 denotes a cylindrical fine adjustment ring which is fitted to the outside of the J-shaped focus switching groove 5 of the switching ring 1 so as to slide and rotate on the spot, and the focus switching of the lens holder 7 is performed on the side body. An oblique fine adjustment groove 11 for sliding the guide pin 8 to slightly move the lens holder 7 back and forth and a fixing screw tightening hole 13 for tightening the fixing screw 12 are formed.

The substrate 4 on which the solid-state image sensor 3 is mounted is fixed to one end of the switching ring 1 configured as described above, and the fine adjustment ring 10 is fitted to the outside of the other end where the J-shaped focus switching groove 5 is provided. At the same time, insert the lens holder 7 and insert the focus switching guide pin 8 into the pin mounting screw hole of the lens holder 7 through the fine adjustment groove 11 of the fine adjustment ring 10 and the U-shaped focus switching groove 5 of the switching ring 1. 9. Similarly, the fixing screw 12 is temporarily fixed to the fixing screw hole 6 of the switching ring 1 through the fixing screw tightening hole 13 of the fine adjustment ring 10. After that, while rotating the fine adjustment ring 10, the lens holder 7 with the lens 17 attached is moved along the J-shaped focus switching groove 5 to switch, and the fine adjustment ring 10 is finely rotated to complete the focus. The fixing screw 12 is tightened to switch and adjust.

[0009]

[Effect of the device]

 As described above, the solid-state image sensor is fixed to one end of the cylindrical switching ring, the J-shaped focus switching groove and the fixing screw hole are provided on the side body near the other end, and the cylinder is covered to cover this part. Fit a lens holder that is fitted with a fine adjustment ring that has a slanted fine adjustment groove and a fixing screw tightening hole on the side barrel so that it slides and rotates at the same position, and that a focus switching guide pin is attached. By inserting the focus switching guide pin into the lens holder through the fine adjustment groove and the J-shaped focus switching groove, the lens can be replaced without changing the solid-state image sensor, which is difficult to move in parallel, and the lens can be replaced. It is possible to move the holder along the J-shaped focus switching groove and rotate the fine adjustment ring to bring the focus into full focus and tighten the fixing screw to fix the switching ring and the lens holder and put them in the operating state. , Solid Complex mechanisms need not for finely moving the substrate mounted with the image pickup device, converts the adapter also the lens replacement readily noticeable to Rukoto with contributing to cost reduction can be eliminated.

[Brief description of drawings]

FIG. 1A is an exploded perspective view of an embodiment of a lens focus switching mechanism according to the present invention, and FIG. 1B is a side view including a partial cross section at the time of assembly.

FIG. 2 is an exploded side view including a partial cross section showing a state of an example of a conventional lens focus switching mechanism.

[Explanation of symbols]

 1 Switching ring 2 Element holder 3 Solid-state image sensor 4 Substrate 5 J-shaped focus switching groove 6 Fixing screw hole 7 Lens holder 8 Focus switching guide pin 9 Pin mounting screw hole 10 Fine adjustment ring 11 Fine adjustment groove 12 Fixing screw 13 Fixing screw tightening Attachment hole 14 Camera mount 15 Screw 16 Adapter 17 Lens

Claims (1)

[Scope of utility model registration request] 1. A substrate having a solid-state image sensor mounted on one end of a cylinder is mounted so that the center of the solid-state image sensor coincides with the cylinder axis, and a substantially J-shaped focus switching groove and a fixing screw are provided on a side body near the other end. A switching ring with a hole is provided with a flange at one end of the cylinder, and a lens holder with a focus switching guide pin that can be attached to the side barrel is slidably inserted into the lens holder. A fine adjustment ring and a fixing screw tightening hole are formed on the J-shaped focus switching groove so that the fine adjustment ring covers the J-shaped focus switching groove and slides and rotates at the same position. A lens focus switching adjusting mechanism, characterized in that a focus switching guide pin is attached to the lens holder, a focus is adjusted and a fixing screw is tightened through the fixing screw tightening hole to fix the lens holder.