JPS59152424A - Electric signal sending and receiving device of sending and receiving electric signal between camera and accessories - Google Patents

Abstract

PURPOSE:To send and receive exactly an electric signal between a camera and an interchangeable lens barrel by connecting a printed wiring board to an electric signal sending and receiving member through an opening part. CONSTITUTION:A holding member 18 for holding electric signal sending and receiving members 16A-16F is made of an insulating material, reduces a printed wiring board 20 and an insulating member 22, and is fixed to an expanded part 10a of a mount member 10. When coupling an interchangeable lens barrel to a mount means of a camera side, the mount member is detained in a non-rotating state against the camera side, a lens body part consisting of a fixed cylinder, a diaphragm setting member, a distance adjusting member, etc. is turned round an optical axis, and bayonets of the camera side and the lens side are coupled. The holding member 18 for holding the electric signal sending and receiving members 16A-16F is attached to the mount member 10 by such an installing operation of the interchangeable lens, therefore, the connection is executed in a non-rotating state between an electric contact of the camera side and the electric signal sending and receiving members 16A-16F.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera or an accessory attached to the camera, such as -
The present invention relates to an electric signal transmitting and receiving device that transmits and receives electric signals between an exchangeable lens barrel for a lens camera, an intermediate tube, and ancillary components such as a flash device and a film winding device.

Many cameras and camera/interchangeable lens systems have been proposed in which focusing signals and exposure control signals are converted into electrical signals between the camera and attached parts, especially interchangeable lens barrels, and the focusing lens and aperture are electrically controlled by motors. has been done.

The above-mentioned electric signal exchange device that exchanges electric signals between the camera and the interchangeable lens has a signal pin extending in the optical axis direction on the mounting member (generally so-called mount member) on the camera side and the interchangeable lens side. A configuration is known in which the signal pin is made to protrude in front of the subject through a hole provided in the hole and is energized by a wire member or the like, and one end of the signal pin is connected to a conductive wire or an electric board.

The present invention proposes an electric signal exchange device that can accurately and reliably exchange electric signals between the camera and the interchangeable lens barrel according to the above description.

A further object of the present invention is to improve the mounting means for the camera and accessories such as the interchangeable lens barrel and intermediate tube, and to improve the mounting means for the camera and its accessories, such as the interchangeable lens barrel and intermediate tube. The purpose of this invention is to propose a signal exchange device.

Furthermore, another object of the present invention is to fix a holding member for holding an electrical signal transmitting/receiving member to a mount member constituting the mounting means, and to provide a hole for inserting the electrical signal transmitting/receiving member into the holding member holding member. and an opening for connection with a conducting wire for conducting electrical signals between the electric signal transmitting and receiving member and the motor or electric circuit components, and an end surface and a side surface in the direction along the optical axis of the electric signal transmitting and receiving member ( We propose an electrical signal exchange device that transmits and receives electrical signals using the outer peripheral surface.

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5. FIGS. 1 and 2 show a replacement for a single-lens reflex camera equipped with a conventionally well-known bayonet mount means. An axial cross-sectional view of the lens barrel and a perspective view of the mounting means are shown, and the electric signal transmitting and receiving device of the wooden embodiment is shown in FIGS.

In the figure, reference numeral 1 indicates the entire interchangeable lens barrel.

Reference numeral 2 indicates a fixed barrel, and a known bayonet mount member 2a is attached to the camera-side mounting surface of the fixed barrel 2.

Reference numeral 4 denotes a distance adjusting member, which has helicoids on its outer and inner peripheries, and is helicoidally coupled to the fixed cylinder 2 and the lens holding cylinder 6 disposed inside the distance adjusting member.

Reference numerals 8 and 10 indicate constituent members of the bayonet mount means and are referred to as mount members. The mount member 8 also includes an inner Q8a, an outer tube 8b, and a lid member 8d that closes a hollow portion 8C formed by the inner tube and the outer tube. [Operation IW of the aperture device] Contains an aperture signal transmission member that controls the aperture device and a driving force transmission member that operates the aperture device based on the operation of the camera. Since the transmission member is already known, only a portion thereof is shown in FIG. 2 as numerals 12 and 14.

The mount member 10 is integrally connected to the mount member by a not-shown hitch, and the flange portion 10a engages with four parts of the inner circumferential surface of the fixed cylinder 2, and the mount member 8 is connected to the fixed cylinder 2.
- 10 is configured to be relatively rotatable but not movable in the optical axis direction.

In FIG. 3, loa indicates a portion of the mount member 10 extending in the direction along the optical axis 01 02 (FIG. 2).

16A and 16B - 16F represents an electric signal transmitting/receiving member made of a conductive material, and FIG. 4 shows a perspective view of a representative example 16A.

The electrical signal transmitting/receiving member 16A has a pin-like or rod-like shape with a circular cross section, and one end surface thereof is a contact surface 16A for contacting an electrical signal contact member on the camera side (not shown), and a groove, protrusion, or curve is provided on the outer peripheral surface. A locking portion 16A2 such as a spiral screw is formed.

18 is the electric signal transmitting/receiving member 16A ------16F
The holding member is made of an insulating member, and is fixed to the extension portion 10'a of the mount member 10 with screws 24a and 24b via a printed wiring board 20, an insulator, and a member 22, which will be described later. .

The holding member 18 has a trapezoidal cross section, and has a hole 18b into which the electrical signal transmitting/receiving member 16A--16F is inserted or press-fitted, on a surface 18a facing an electrical contact on the camera side (not shown). establish.

When the holding member 18 is made of a synthetic resin material, the hole 18b is formed in the electrical signal transmitting/receiving member 16A---16.
The electric signal transmitting/receiving member 16 is machined to be slightly smaller than the outer diameter of F.
A ----16F may be fixed by press-fitting.

Reference numeral 18c indicates an opening provided on the side surface of the holding member 18, and the internuclear part 18c is the opening provided in the side surface of the holding member 18, and the internuclear part 18c is the opening provided in the side surface of the holding member 18.
----When 16F is press-fitted into the hole 18b, the electric number S transfer member 16A is opened so that a part of the outer periphery of 16F is exposed.

The printed wiring board 20 is preferably a flexible printed wiring board, and the opening 18c of the holding member 18
Conductor patterns 20a and 20b on the surface facing the
form.

The electrical signal transmitting/receiving member 16A---16F is press-fitted into the hole 18b of the holding member 18, and the holding member 18
When the printed wiring board 20 and the insulating member 22 are sandwiched between the electrical signal transmitting member 16 A and the electrical signal transmitting/receiving member 16 A ------16
The outer peripheral surface of F and the conductor pattern of the printed wiring board 20 are pressed into contact with each other, and the electrical signal transmitting/receiving member 16. A------
16F and the printed wiring board are mechanically coupled and electrically connected. .

As shown in FIG. 5, the extended portion 20b of the printed wiring board 20 is disposed between the mount members 8 and 9, and is held between the mount members 8 and 9, and the other end 20c is held by the mount members 8 and 9. It is led out to the outside of the fixed cylinder through an opening 2b formed in the cylinder 2, and furthermore, the led-out tip is connected to a drive circuit of a motor (not shown) fixed to the outside of the fixed cylinder 2.

Reference numeral 4a indicates the southern portion provided on the outer periphery of the distance adjusting member 4, and the toothed portion 4a is connected to the motor or a deceleration mechanism (not shown) meshed with the motor to provide a focusing lens l.
move.

In the above configuration, the electrical signal transmitting/receiving member 16A---
--16F is used to supply power energy between the camera and the interchangeable lens barrel, or to the interchangeable lens side or camera side when a detection device for detecting focus signals is installed on either the camera side or the interchangeable lens barrel. It transmits and receives detected focusing signals, or transmits and receives electrical signals (for example, exposure control signals, etc.) necessary for photographing operations between other cameras and interchangeable lens barrels.

In order to connect the interchangeable lens barrel 1 having the above configuration to a camera-side mount means (not shown), the mount members 8 and 10 are held in a fixed position and non-rotatably relative to the camera-side mount member by known means. The lens body consisting of the fixed barrel 2, aperture setting member 2b, distance adjusting member 4, etc. is aligned with the optical axis 0. - Rotate around 02 to connect the camera-side and lens-side payonent mount members, and attach the interchangeable lens barrel 1 to the camera.

In the above-mentioned operation of attaching the interchangeable lens, since the holding member 18 that holds the electrical signal transmitting/receiving member 16A--16F of this embodiment is recessed into the mount member 1° as described above, the interchangeable lens When the camera is attached to the camera, the electrical contacts on the camera side and the electrical signal transmitting/receiving member are connected in a non-rotating state.

As described above, the present invention provides a hole portion for inserting (press-fitting) the electric signal transmitting and receiving member into the holding member 18 that holds the electric signal transmitting and receiving member 16A -----16F, and By providing an opening +8c1 through which the outer peripheral surface of the electrical signal transmission/reception member is exposed and fixing the holding member 18 to the mount member with the printed wiring board 20 in between, the structure is simple and the electrical signal transmission/reception is possible. We were able to obtain an electrical signal transmitting and receiving device that can reliably guarantee the electrical connection between the component and the printed wiring board.

Furthermore, the present invention provides an electric signal transmitting/receiving member 1 in the above embodiment.
6 A ------- An electric signal transmitting/receiving device composed of 16F, holding member 18, printed wiring board 20, insulating plate 22, mount member 10, etc. is placed in a known payonent/mounting means, and the function of the bayonet/mounting means is We were able to obtain a highly versatile electrical signal exchange device that can be installed without damaging the system.

In the embodiment shown in FIG. 2, the electrical signal transmission/reception device is arranged on the plane of the lid portion 8d of the mount member 8, but it is also possible to provide a recess in the lid portion 8d and accommodate the device in the recess. Of course it is possible.

Further, as the above-mentioned embodiment of the present invention, an example was shown in which an electric signal transmitting/receiving device was installed in an interchangeable lens barrel, but as described above, the present invention also includes an intermediate tube, a flash device, and an automatic flash device that are attached to the camera as accessories. It is also useful as an electric signal transmitting and receiving device for transmitting and receiving signals between hoisting devices (auto wine goo), etc. and attached high-volume devices.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of an interchangeable lens barrel in which an electric signal exchange device according to the present invention is installed. FIG. 2 is a perspective view of essential parts of the interchangeable lens barrel shown in FIG. 1. FIG. 3 is an exploded perspective view of the electrical signal transfer device. FIG. 4 is a perspective view of the electric signal transmitting and receiving member. FIG. 5 is a partial cross-sectional view of the electric signal transmitting and receiving device. 8・10・Fist・Mount member 16A ------16F...Electric signal transfer member 18...Holding member 20...Printed wiring board

Claims (2)

[Claims] (1) An electrical signal exchange device for transmitting and receiving electrical signals between a camera and an accessory weight attached to the camera, comprising mounting means for attaching the camera or accessory weight to the accessory weight or camera of the other party, and the camera or the accessory weight. an electrical signal transmitting/receiving member that electrically contacts one of the other party's electrical signal transmitting/receiving members; a holding member that fixes the electrical signal transmitting/receiving member to the camera or the attached quantity; and a holding member attached to the camera or the attached quantity. the holding member is fixed to the mounting means of the camera or the auxiliary amount, and the electrical signal sending and receiving member is attached to the holding member. An electric signal transmitting and receiving device for transmitting and receiving electric signals of a camera and an attached weight, the device having an insertion hole and an opening, and having a sign that the printed wiring board is connected to the electric signal transmitting and receiving member through the opening. (2) A locking portion for locking with the printed wiring board is provided on the outer peripheral surface of the electric signal transmitting/receiving member. A device that sends and receives electrical signals.