JPS5829184A - Rotary head device - Google Patents

Abstract

PURPOSE:To make the size minimize even with incorporated camera with a head through axially thinned size, by providing a roller bearing between opposing surface of a fixed drum and a rotating member and forming an optical system path at the center from the bearing. CONSTITUTION:A drum 23 is supported with a bearing and rotated with a torque of a rotary magnet 40 through the application of power to a stator coil 39. A tape runs on the outer circumference of the drums 23 and 24 and a magnetic head 43 is driven. An optical image is converted at a solid-state image pickup element 53 and recorded with the head 43. A roller bearing 35 has a large diameter and the shift between opposing positions of the two bearings 35 gives only a small effect on a rotating locus of the magnetic head 43. Then, the interval between the bearings 35 can be made small for thin size. Since the diameter of the bearing 35 is large and no rotating shaft is used, a vacant hole 49 can be made at the center of the drum 23, it can be used for an optical path, allowing to make the size small even with incorporated camera.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a rotary head device for a rotary head magnetic recording/sickle reproducing device.

In recent years, Fm rotating head magnetic recording and reproducing equipment (VTfL)
The appearance of wrinkles in the skin is progressing, and portable VTRs are beginning to become popular.

Along with this, single-turn head devices have become smaller and thinner, but conventional ones are approaching the 1111itliKK world.
A device that integrates an e-record playback device and a camera has appeared, but there is a growing demand for such a device to be smaller and lighter.

Figure g1 shows a conventional rotating head device, fixed lower drum 1
A rotating shaft 2 is arranged at the center of the rotating shaft 2, and the rotating shaft 2 is rotatably attached to the fixed lower drum lK by means of a bearing 3.4. The rotating upper drum 5 facing the fixed lower drum l is supported by a support member 6
The support member 6 is attached by a KIE screw 7, and the rotation axis 2Kiil of the support member 6 is fixed above the bearing 3 by the attachment screw 8. As a result, the rotating upper drum 5 is rotatably arranged relative to the fixed lower drum 1. a At least one head substrate 10 having a magnetic head 9 is attached to the rolling drum 5 using attachment screws IIK. The outer peripheral surfaces of the rotating upper drum 5 and the fixed lower drum 1 serve as running surfaces for the magnetic tape.

The support member 6 has a rotor IJ) lance rotating side 1-12.
is attached, and opposite to this, the stationary side winding 13 of the rotary transformer is attached to the fixed lower drum 1, and the rotating side winding 12 is connected to the magnetic head 9, and a signal output to the i1-type helad 9 is attached. Alternatively, the signal output from the magnetic head 9 is input/output via electromagnetic coupling of a rotary transformer.

For the downward rotation of the bearing 4, a support member 14 is attached to the shaft 2, and the rotary yoke l of the motor 15 is attached to the support member 14.
G is attached using attachment screws 17. A rotary magnet 18 is fixed to the rotary yoke 16. A stator 19 and a stator coil 20 are fixed to the fixed lower drum IK, facing the rotary magnet IIIC.

The fixed lower drum 1 is attached to a mounting base 21 in a rotary head Nada magnetic recording brass reproducing apparatus by means of mounting screws 22.

In the conventional rotating head device shown in No. 1aK, since the rotating upper drum 5 is attached to the rotating shaft 2 and the rotating shaft 2 is supported by the bearing 3.4, the bearings 3.40 are spaced apart from each other. When , bearing 3 and bearing 4
The inclination of the rotating shaft 2 due to the relative positional deviation from the magnetic head 9 has a large effect on the a-rotary locus of the magnetic head 9, making it difficult to obtain high-precision rotation. It was extremely difficult to do so.

Furthermore, when a rotating head type magnetic recording/reproducing device and a camera are integrated, the optical path of the camera's optical system must be determined to avoid each part of the rotating head type magnetic recording/reproducing device, which makes it difficult to downsize. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary head device that can be made thinner in the axial direction and moreover, can be made smaller when integrated with a camera.

In order to achieve this object, the present invention provides at least one rolling bearing between opposing pages near the outer periphery where the rotating member and the fixed drum face each other, and forms an optical system optical path closer to the center than the rolling bearing. It is characterized by

The present invention will be explained in detail below based on the illustrated embodiments.

Figure 1112 shows a single rotation upper drum 2 showing an embodiment of the present invention.
3 and the outer peripheral surface of the fixed lower drum 24 form a tape running surface, and a lead 25 for guiding a magnetic tape (not shown) is provided on the outer peripheral surface of the fixed lower drum 24. Fixed lower drum 2
A support s27 integrally formed with the rotary upper drum 23 is disposed in the internal space 26 of the rotary upper drum 23. Two fixed ring members 29 are disposed on the opposing inner circumference mzsK of the fixed lower drum 24, which is provided at a position facing the support 927 and close to the outer circumferential surface. Opposed to this, the supporting portion 270 facing outer peripheral surface 30
Two rotating wheels S members 31 are arranged. Annular grooves 32 and 33 are provided in the constant wheel constant material member 2 and the rotating wheel member 31, and the shape 1111g32.33K
11) Steel balls 34 are inserted, and a rolling bearing 35 is formed by the fixed ring member 291, rotating ring member 31, and steel balls 34. The rotating upper drum 23 is rotatably supported by the fixed lower drum 24 by a rolling bearing 35. Rolling bearing 350 radial and axial play can be removed by tightening ring 3.
6t - removed by screwing into the support 27 and offsetting the steel balls 34 of the rolling bearing 35 in the annular groove 32.33.

The fixing member 3 is attached to the fixed lower drum 24 by a mounting screw 37.
8 is fixed, and a stator coil 39 is fixed to the fixing member 38. Support portion 27 facing stator coil 39
The rotary magnet 40 is fixed at the 0 position. Above the rolling bearing 35, the rotating side winding 11 of the rotary transformer is attached to the support portion 27 of the rotating upper drum 23 and the fixed lower drum 24.
41 and stationary side winding @42 are attached.

A head substrate 44 having a magnetic head 43 is attached to the rotating upper drum 23 with a mounting screw 45, and the height of the magnetic head 43 is adjusted with a height adjusting screw 46.
- The foot drum 24 is attached by a mounting screw 47 to a mounting base 48 in a main body that integrates a rotary head W magnetic recording/reproducing device and a camera.

A hole 49 is provided at the center of rotation of the upper rotating drum 23, and a hole 50 communicating with the next hole 49 is provided in the fixing member 38. A photographing optical system 5 is placed above and opposite the hole 49.
1 and a lens barrel 52 that holds it are arranged. An optical path of the photographing optical system 51 is formed in the hole 49,50, and a solid-state image sensor 53 such as a COD or BBD located on the imaging plane of the photographing optical system 51 is fixed to the mounting base 48. Stator coil 3
A shielding member 54 which serves both as a shielding case for the rotary magnet 9 and the rotary magnet 40 and as a light shielding mask for the photographing optical system 51 is fixed to the fixing member 38&C.

When the stator coil 39 is energized from a drive circuit (not shown), a rotational force acts on the four-tary magnet 40, causing the upper drum 23 to rotate one rotation while being supported by the rolling bearing 35. Rotating upper drum 23 and fixed lower drum 24
A magnetic tape (not shown) is wound around the outer circumferential surface of the magnetic tape and runs, and recording or reproduction is carried out by the magnetic head 43 scanning the magnetic surface of the magnetic tape once at a rotational speed faster than the running speed of the magnetic tape. be exposed.

An optical image incident from the photographing optical system 51 is captured by a solid-state image sensor 53
is converted into an electrical signal by a signal processing circuit (not shown).
Through the rotor 'J) Stationary side winding of the lance I! 42 and rotating side winding! i51, and is recorded on the magnetic tape by the magnetic head 43.

According to this embodiment, the rolling bearing 35 is connected to the fixed lower drum 2.
4, the diameter of the rolling bearing 35 becomes large.

The deviation or inclination of the relative positions of the two rolling bearings 35 has a smaller effect on the rotation trajectory of the magnetic head 43. Therefore, the interval between the two rolling bearings 35 can be reduced, and a thinner design can be achieved. can.

In addition, since the diameter of the rolling bearing 35 is large and the rotating shaft is eliminated, a hole 4 is formed in the center of rotation of the upper rotating drum 230.
9 can be provided, and the holes 49 and 50 of the y fixing member 38 can be used as the optical path of the photographing optical system. Therefore, it is possible to reduce the size of the camera by integrating it with the camera.

FIG. 3 shows the relationship between the rotating head device 55 and the optical system according to the present invention, and the third position is an example in which the optical path 56 of the photographing optical system is formed in the rotating head device 55. The main body 57 is a combination of a magnetic recording/reproducing device and a camera. The optical image passes through the photographing optical system 58 and is sent to the half mirror 5.
9 and the solid-state image sensor 60 via the photographing optical system optical path 56't'
However, part of the light is reflected by the half mirror 59, passes through the mirror 61 and the finder optical system 62, and enters the photographer's eye 63.

sWJ<Unit is an example in which the optical path formed in the rotary head device 55 is the finder optical system optical path 64.--In the third figure, the finder optical system is taken from the photographing optical system T.
Although TLm is shown, the finder optical system may be provided on a separate optical path from the photographic optical system.

Fourth! IcI represents another embodiment of the invention. Portions similar to those in Figure #L2 are designated by the same reference numerals. The rotating member 6
5 is rotatably supported by the fixed lower drum 24. Magnetic helad 43 is attached to rotating member 65 . The fixed upper drum 67 is fixed to the fixed lower drum 24 by a coupling member 68 and mounting screws 69, 70 so as to maintain a predetermined relative positional relationship.

A hole 7 is provided in the center of the fixed upper drum 67 and the rotating member 65.
1 and 72 are provided, and a protrusion 73 formed on the fixing member 38 is located in the lower half of the hole 72. The solid-state image sensor 53 is fixed to the protrusion 73 . The lens barrel 52 that holds the photographing optical system 51 or the finder optical system has a protrusion hole 71.7.
2, the main body 57 (FIG. 3) K is fixed.

Also in this embodiment, the photographing optical system optical path or the finder optical system optical path is formed within the holes 71 and 72.

The photographing optical system 51 or the finder optical system may be held by the support part 27 of the rotating upper drum 23 as shown in FIG. can be attached to. In FIG. 5, the solid-state image sensor 53 is fixed to a protrusion 75 of the mounting base 48, and the protrusion 75 is located at 5°K of the hole in the fixing member 38.

FIG. 6 shows another embodiment of the present invention, in which a stator coil 39 is fixed to a lens barrel 52, and a rotary magnet 40 is fixed to a support portion 27 of a rotating upper drum 23, respectively. 76 is a photographing optical system, and 77 is a shielding member that serves as both a shield case and a light shielding member.

Between the lens barrel 52 and the support part 27, as shown in FIG.
It is also possible to provide a.

In the embodiment of FIG. 2, 5.6.7, the rotating upper drum 2
3 corresponds to the rotating member of the present invention.

In the illustrated embodiment, the annular groove 32 of the rolling bearing 35
．． 33 is a fixed wheel member 29 and a rotating wheel member 3 which are separate members.
1, but may be provided on the opposing inner peripheral surface 28 of the fixed lower drum 240, the opposing outer peripheral surface 30 of the rotating upper drum 230, or the opposing inner peripheral surface 66 of the rotating member 650. Further, the number of rolling bearings 35 can be reduced to one. In this case, a means is required to prevent the upper drum 23 or the rotating member 65 from tilting diagonally during one revolution. Furthermore, instead of steel ball 34, K
It is also possible to use rollers.

The present invention is also applicable to an intermediate drum rotation system in which the magnetic head 43 is attached to an intermediate drum rotatably arranged between the fixed upper and lower drums 67 and 24.

The rolling bearing 35 is not limited to one provided between the opposing circumferential surfaces of the fixed lower drum 24 and the rotating upper drum 23 or the rotating member 65, and is provided between the fixed lower drum 24 and the rotating upper drum 23 or the rotating member. It may be provided at a position closer to the outer periphery between the opposing end surfaces of 65 and .

An image pickup tube can also be used instead of the solid-state image sensor 530. Further, the solid-state image sensor 53 or the image pickup tube may be fixed to the main body 57 below the mount 48, and the optical system light path may pass through a hole provided in the mount 48. Furthermore, the position of the optical system light path is not limited to the center, but may be located closer to the center than the rolling bearing 35.

As explained above, according to the present invention, since at least one rolling bearing is provided between the facing surfaces of the rotating member and the stationary drum near the outer periphery, the axial dimension can be reduced. In addition, since there is no rotation axis, the center side pressure and optical system optical path are formed from the rolling bearing, so space can be used effectively and it can be integrated with the camera. It is possible to reduce the size of the device by making it smaller.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional rotating head device, FIG. 2 is a sectional view of an embodiment of the present invention, and FIG. FIG. 4 is a cross-sectional view of another embodiment of the present invention, and FIGS. 5 to 7 are cross-sectional views of other embodiments of the present invention. 23... Rotating upper drum, 24... Fixed lower drum, 2
8...9 opposing inner circumferential surface, 3o... opposing outer circumferential surface, 35...
・Rolling bearing, 39...Stator coil, 40...
・Rotary magnet, 43...magnetic head, 49,
50... Hole, 51... Photographing optical system, 55... Rotating head device, 56-... Photographing optical system optical path, 64e...
Finder optical system optical path, 65--rotating member, 66-fist/opposing outer peripheral surface, 71.72--hole, 76--photographing optical system. Patent applicant: Canon Co., Ltd. Agent Minoru Nakamura 11 1987 1983 1974 Figure 1" 61i21 77

Claims (1)

[Claims] In a rotating head device including a constant drum, a rotating member having a magnetic head and rotatably arranged opposite to the fixed drum, and a rotating gas that drives the rotating member, the rotating member and the fixed drum are connected to each other. 1. A rotary head device characterized in that at least one rolling bearing is provided between opposing surfaces near the outer periphery, and an optical system optical path is formed closer to the center than the rolling bearing.