JPS6317073Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention enables, for example, still images to be stored on a rotating recording medium.
For example, regarding a still image recording camera that performs magnetic recording so that a plurality of annular recording tracks are formed on a rotating magnetic sheet (hereinafter simply referred to as a magnetic sheet), in particular, a magnetic recording head (hereinafter simply referred to as a magnetic head) is attached to a rotating magnetic sheet (hereinafter simply referred to as a magnetic sheet). This paper attempts to propose a still image recording camera that can be used only when necessary.

The applicant has already developed a new still image device that enables required still image signals to be recorded and/or reproduced on the magnetic sheet while intermittently moving a magnetic head in the radial direction of the magnetic sheet rotating at high speed. We are proposing a recording camera.

By the way, in conventional devices of this type, a magnetic head is brought into contact with the magnetic recording surface of the magnetic sheet before it is driven to rotate, and then the magnetic sheet is driven to rotate by the rotational driving force of a drive motor. Video signals are magnetically recorded so that required recording tracks are formed on the surface.

However, the magnetic head may come into contact with the magnetic sheet immediately after pressing the release operation member. For example, during the preparation time until the rotational speed of the drive shaft for rotationally driving the magnetic sheet reaches a predetermined speed, The magnetic head may be separated from the magnetic recording surface of the magnetic sheet.

In general, if the drive motor starts up very quickly, it is not necessary to contact the magnetic head with the magnetic sheet from the beginning of the magnetic sheet's rotation, but in reality, it takes several seconds for the drive motor to start up. (For example, about 2 to 3 seconds)
Therefore, the magnetic head is in unnecessary contact with the magnetic sheet during the time required for its rise.

Also, after the drive motor has finished starting up,
If you press the release operating member while the motor continues to rotate at a constant speed, the required signal will be magnetically recorded on the magnetic sheet immediately, but in this case as well, while the release operating member is pressed. , the magnetic head is in unnecessary contact with the magnetic sheet.

In this way, if the magnetic head continues to be in unnecessary contact with the magnetic sheet, the sheet-contacting surface of the magnetic head will wear out faster, and the magnetic recording surface of the magnetic sheet will wear out and get damaged faster. Not.

The present invention aims to solve the problems of the conventional ones as described above, and prevents wear and damage of the magnetic recording/reproducing device head and magnetic sheet, and records still image signals with a good rise. This was proposed for the purpose of providing a still image recording camera that enables the following: a release operation member having a second position for capturing an object image; a video signal processing circuit and a magnetic head for sequentially recording video signals for one field or one frame on the magnetic sheet so as to record a circular track; It consists of an electromagnet and an elastic member that act to bring the magnetic head and the magnetic sheet into contact with or apart from each other, and rotates the magnetic sheet in conjunction with the first position of the release operation member, and rotates the magnetic sheet in a second position. The magnetic head and the magnetic sheet are brought into contact with each other depending on the position, and the video signal is recorded on the magnetic sheet.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view schematically showing a so-called electronic camera, which is a still image recording camera according to the present invention, and FIG. 2 shows the main parts of the electronic camera and a magnetic sheet jacket attached to the camera. FIG.

As shown in FIG. 1 above, a camera housing 1 of a so-called electronic camera, like a normal photosensitive film camera, includes a lens system 2, an iris mechanism 3, a release operation member 4a, and a release operation member 4a.
A shutter control circuit 4 driven by the shutter control circuit 4, a shutter section 5 opened and closed by the shutter control circuit 4, mirrors 6 and 7, and a viewfinder 8.
etc. are provided. In addition, as parts unique to electronic cameras, a light sensor section 9 of a fixed image pickup device (CCD etc.), a signal recording circuit 10, a magnetic recording device main body 11
etc. are provided.

As shown in FIG. 2, the magnetic recording device main body 11 incorporated into the camera housing 1 is provided on a mounting board 12, and a magnetic sheet jacket 13 is inserted into and removed from the mounting board 12. A jacket holder 14 is attached to the jacket holder 14 by a hinge shaft 15a so as to be openable and closable. Jacket housing 1 constituting the outer housing portion of the magnetic sheet jacket 13
A disc-shaped magnetic sheet 16 is rotatably housed in the magnet 5, and on this sheet 16, one field or one frame worth of video signals, such as still image information, forms a plurality of annular tracks. It is now being recorded magnetically. A window 17 is formed in a part of the jacket housing 15 so that a part of the magnetic sheet 16 is exposed to the outside. Inside this window section 17,
One or more (one in this embodiment) magnetic head 18 is inserted, and a plurality of video signals are magnetically recorded on the magnetic sheet 16 by the magnetic head 18. The magnetic head 18 is inserted into the window 17 and moves in the radial direction of the magnetic sheet 16 (in this embodiment, from the inner circumferential direction to the outer circumferential direction) for each rotation of the magnetic sheet 16. A plurality of video signals are magnetically recorded in a ring on the top.

Further, a magnetic sheet 1 is placed on the mounting board 12.
A sheet rotary table 20 on which a reinforcing member 19 provided at the center of rotation of the magnetic sheet 6 is placed, and a magnetic sheet 16 in a magnetic sheet jacket 13 for recording and/or reproducing still image information, for example. The magnetic head 18, a guide plate 22 for stabilizing the contact state of the magnetic head 18 with the magnetic sheet 16, and a guide plate 22 for automatically and intermittently feeding the magnetic head 18 in the radial direction of the magnetic sheet 16. A head movement operation section 23, a drive motor 24 for rotationally driving the seat rotating shaft 20, etc. are provided.

The magnetic head 18 has a head movement operation section 23.
The magnetic head 18 is attached to the middle part of the moving arm 25 that constitutes the magnetic sheet 16.
The head protrusion window 26 formed at 2 is viewed from below. A pair of height regulating pins 27, 27 are installed on this guide plate 22. These pins 27, 27 are provided so as to provide a predetermined distance between the guide plate 22 and a regulating plate 29, which will be described later, provided on the side of the case cover 28 opposite thereto.

Note that the moving arm 25 is provided with a spring 3.
One end 30a of 0 is locked, and this movable arm 25 is always centered on the pivot 31 in the direction of arrow A in FIG.
being pulled in the direction.

A fixed shaft 33 is disposed in approximately the center of the mounting base 12, and is inserted into an insertion hole 32 on the magnetic sheet jacket 13 side. As shown in Figures 2 and 4, the rotating table 20 is attached so as to be freely rotatable around this fixed shaft 33.
The rotating table 20 and the drive shaft 24 of the drive motor 24
A belt 35a is stretched between the belt pulley 35 attached to the fixed shaft 33a. The tip 33a of the fixed shaft 33 is connected to the magnetic sheet jacket 13 of the magnetic recording device main body 11 as shown in FIG.
When the magnetic sheet 16 is attached to the magnetic sheet jacket 13, the magnetic sheet 16 penetrates the insertion hole 32 of the reinforcing member 19 attached to the center of the magnetic sheet 16 and protrudes above the magnetic sheet jacket 13.
9 is adapted to abut and engage with a distance adjusting screw 36 which is screwed into the tip of the

Further, the guide plate 22 is inserted into the window 17 of the magnetic sheet jacket 13, as shown in FIG.
The purpose of this guide plate 22 is to guide the rotation of 6 in a stable state.
As shown in FIG. 4, it is integrally formed with a plate-shaped horizontal portion 37 and a base end block 38 formed at its base end, and a magnetic sheet 16 is attached to the upper end surface of the horizontal portion 37 on its rotating surface. A sheet guide surface 37a for guiding the sheet so as to be substantially parallel to the sheet is formed in the shape of a flat surface. This sheet guide surface 37
A is for regulating the position of the sheet 16 from the bottom side around the head abutting portion where the magnetic head 18 abuts against the magnetic sheet 16 (see FIG. 3). For this purpose, the sheet guide surface 3
The circumferential edge 37b of 7a is chamfered in an arc shape. Furthermore, guide surfaces 38d and 38e are formed on the lower surface of the base end block 38.
The magnetic head 18 is attached to the guide surfaces 38d and 38e.
The upper surfaces of the contact sliding portions 39a and 39b of the head slider 39 to which the head slider 39 is attached are configured to slide in opposition to each other. These guide surfaces 38d, 38
e is parallel to the sheet guide surface 37a. Further, the above-mentioned window portion 26 for protruding the magnetic head is formed through the central portion of the horizontal portion 37. This window portion 26 is connected to the magnetic sheet 16
For magnetic recording on the sheet 16, the magnetic head 18 is attached to the sheet of the guide plate 22 so that the magnetic head 18 can track all the recording tracks between the innermost track and the outermost track of the sheet 16. It is opened to project onto the guide surface 37a.

Next, as described above, the head moving operation section 23 moves the magnetic head 18 intermittently in the radial direction of the magnetic sheet 16 while moving the magnetic head 18 over the magnetic sheet 16, for example from the innermost track to the outermost track. This is for tracking operation of the magnetic head 18 so that required information can be magnetically recorded sequentially over positions. In this illustrated example,
The main body is an L-shaped head moving arm 25 that is rotatably supported by a pivot 31 mounted on the mounting board 12. The magnetic head 18 is integrally attached as described above.

The head slider 39 and the head moving arm 2
5, the magnetic head 18 is connected to the magnetic sheet 16.
A pressing means 40 is arranged to abut against the. This pressing means 40 is driven in conjunction with the operation of the release operation member 4a, and in this embodiment, it includes a head slider 39 made of a magnetic material and a head slider 39 that guides the head slider 39 only in the vertical direction. Guide pins 41a, 41b
and between these guide pins 41a and 41b,
It also consists of an electromagnet 42 fixed on the head moving arm 25, and a leaf spring 43 interposed between the head slider 39 and the head moving arm 25 so as to cover the upper part of the electromagnet 42. There is.

One end of the head slider 39 has a through hole 44 into which a guide pin 41b is inserted, as shown in FIG.
The other end also has a notch 45 through which the guide pin 41a is inserted.

Further, each guide pin 41a, 41b is integrally planted on the head moving arm 25 at a predetermined interval. Further, the electromagnet 42 is composed of an iron core 42a fixed on the head moving arm 25 and a coil 42b wound around it. The current is supplied by the Further, the leaf spring 43 has a central portion protruding upward, and a through hole 43a and a notch 43b are formed at both ends thereof. Inside these through holes 43a and notches 43b,
Each guide pin 41b, 41a is inserted therethrough.
This leaf spring 43 is for elastically pushing up the head slider 39 upward from the bottom thereof to press the magnetic head 18 against the magnetic recording surface 16a of the magnetic sheet 16, and is always directed toward the side of the head slider 39. is elastically biased.

On the other hand, a regulating plate 29 is disposed on the case cover 28, and as shown in FIGS. 2 and 3, this regulating plate 28 is used to regulate the position of the magnetic sheet 16 from the upper surface side. Rectangular sheet regulating section 2
9a, and a plate-shaped attachment portion 29b integrally formed on the upper surface of the restriction portion 29a, and is disposed at a position on the case cover 28 side facing the guide plate 22. Note that the regulation plate 29
As shown in the figure, the four
It is supported movably in the axial direction by locking pins 46a, . . . of the book.

In addition, a compression spring 47 is interposed between the case cover 28 and the regulating plate 29 .
Therefore, the restricting plate 29 is always elastically urged in the direction of the guide plate 22 along the locking pins 46a, ... by the elastic force of the compression spring 47. The tip of the mounting portion 29b projects to a position ahead of the guide plate 22, and the above-mentioned gap adjustment screw 36 is screwed into this tip.

Furthermore, a flat sheet regulating surface 29c as shown in FIG. 3 is formed on the lower end surface of the sheet regulating portion 29a constituting the regulating plate 29. As shown in FIG. This regulating surface 29c is connected to the sheet guiding surface 37a of the aforementioned guide plate 22 and the magnetic recording surface 16a of the magnetic sheet 16.
The purpose is to regulate the position of the machine at a predetermined distance from both the top and bottom sides.

Next, the operation of the present invention having the above configuration will be explained.

First, when the magnetic sheet jacket 13 is loaded in a predetermined position in the jacket holder 14 and the jacket holder 14 is pushed into the magnetic recording apparatus main body 11, the jacket passes through the center hole 48 formed in the center of the jacket 13. The fixed shaft 33 is inserted into the insertion hole 32 of the reinforcing member 19 provided at the center of rotation of the magnetic sheet 16 in the housing 15 .
At the same time, the regulating portion 29a of the regulating plate 29 and the horizontal portion 37 of the guide plate 22 are spaced apart from each other by a predetermined distance.
They are inserted into the window 17 of the magnetic sheet jacket 13 and are opposed to each other within the window 17. Therefore, the magnetic recording surface 16a of the magnetic sheet 16 and the sheet guide surface 37a of the guide plate 22 face each other. Note that at this time, the head slider 39 is descending due to the adsorption action of the electromagnet 42.
Therefore, the head tip of the magnetic head 48 is separated from the magnetic recording surface 16a.

Next, when the release operating member 4a reaches the first position where it is pressed half way in the first stage, when the release operating member 4a is pressed half way in the first stage, the shutter control circuit 4 operates to drive the shutter. The motor control circuit is driven, and the drive motor 24 starts rotating due to the operation of the circuit. After a few seconds, the drive motor 24 reaches the specified rotational speed. The motor 24 is continuously rotated while the rotational speed of the drive motor 24 is maintained at a specified value.

Then, in the second stage, when the release operation member 4a is further pressed and reaches the second position, the pressing means 40 is driven in conjunction with the pressing operation to the second position. That is, the supply of current to the coil 42b constituting the electromagnet 42 is stopped, and the electromagnet 42 stops its attraction action. Therefore, the protrusion 43c formed at the center of the leaf spring 43 moves away from the electromagnet 42 and pushes up the head slider 39 by its spring force. Therefore, the head slider 39 is guided by the guide pins 41a, 41b, and the sliding portions 39a, 39b contact the guide surfaces 38d, 38e provided on the lower surface of the guide plate 22.
is pushed up until it makes contact. Each abutting and sliding contact portion 39a, 39b of the head slider 39 is connected to the guide plate 22.
When the head tip of the magnetic head 18 provided on the head slider 39 comes into contact with the guide surfaces 38d and 38e of the magnetic sheet 16,
a. Note that at this time, the head chip contacts the magnetic recording surface 16a, causing the magnetic sheet 16 to
However, when this sag is resolved and the rotation speed reaches the specified value again, a predetermined control signal is immediately supplied from the signal recording circuit 10 to the magnetic head 18. Therefore, a required video signal is magnetically recorded by the magnetic head 18 so as to form an annular recording track on the magnetic recording surface 16a of the magnetic sheet 16. Once magnetic recording is complete,
A current is supplied to the coil 42b of the electromagnet 42, and therefore the attraction action of the electromagnet 42 is started. Therefore, the head slider 39 is lowered by its adsorption action, and the head tip of the magnetic head 18 is therefore separated from the magnetic recording surface 16a of the magnetic sheet 16. Therefore, it is possible to prevent wear of the tape contacting surface of the head chip and the magnetic recording surface 16a.

Next, FIG. 5 shows another modification of the pressing means used in the present invention.

In the embodiment shown in FIGS. 1 to 4 above, a leaf spring 43 is arranged at a lower position of the head slider 39, and the spring force of this leaf spring 43 moves the head slider 3
9 and push up the magnetic head 18 onto the magnetic sheet 16.
However, in this embodiment, the lower position of the head slider 39 is
Further, coil springs 49a and 49b are arranged around each guide pin 41a and 41b, and the head slider 39 is pushed up by the spring force of each of these coil springs 49a and 49b, and the magnetic head 18 is pressed against the magnetic sheet 16. are doing.

Also in the case of the pressing means 40a configured in this way, it is possible to achieve the same effects as the pressing means 40 shown in the above-mentioned embodiment.

Furthermore, in the embodiments shown in FIGS. 1 to 5,
The head slider 39 is made of a magnetic material, but as shown by the broken line X in FIG. It may also be made of synthetic resin or the like.

Further, as another example of the configuration of the pressing means 40, a self-holding plunger may be fixed on the head moving arm 25, and this plunger may be driven in conjunction with the operation of the release operation member 4a. .

Furthermore, in the above embodiment, the magnetic head 18 is kept separated from the magnetic sheet 16 by attracting the electromagnet 42 during normal times, and the magnetic head 18 is moved away from the magnetic sheet 16 only when the release operation member 4a is pressed. 16, but on the contrary, two electromagnets that attract each other in conjunction with the operation of the release operating member are fixed to both sides of the horizontal lower surface of the guide plate. Alternatively, the head slider may be pulled upward by the attraction action of the electromagnet only when necessary, and the magnetic head may be pressed against the magnetic sheet.

Note that the present invention is also applicable to a camera configured such that the release operating member is pressed in conjunction with a self-timer device.

As described above, the present invention rotates the magnetic sheet in connection with the operation of moving the release operation member to the first position, and rotates the magnetic sheet in connection with the operation of moving the release operation member to the second position. Since the video signal is recorded by pressing the pressing means that brings the head into contact with the magnetic sheet, the magnetic head and the magnetic sheet are brought into contact only when the release operation member is moved the most, and the magnetic sheet is brought into contact with the magnetic sheet. Since the magnetic head and the magnetic sheet come into contact with each other while the magnetic sheet is already being rotated, the start-up when recording a video signal on the magnetic sheet is quick, and the video signal can be recorded quickly. Since the head and the magnetic sheet come into contact only when the release operating member is operated, the magnetic head is not brought into contact with the magnetic sheet unnecessarily. Therefore, it is possible to prevent abrasion of the contact surface of the magnetic head to the magnetic sheet and abrasion or damage to the magnetic sheet, thereby improving durability and maintaining good recording and reproducing characteristics over a long period of time.

[Brief explanation of drawings]

FIG. 1 is a sectional view schematically showing a so-called electronic camera, which is a still image recording camera according to the present invention, and FIG. 2 shows the main parts of the electronic camera and a magnetic sheet jacket attached to the camera. FIG. 3 is an enlarged cross-sectional view of the main parts showing the vicinity of the pressing means, and FIG. 4 is an exploded perspective view showing the pressing means between the guide plate and the head moving arm. be. FIG. 5 is a sectional view of a main part showing another example of the pressing means. 4a... Release operation member, 11... Magnetic recording device main body, 13... Magnetic sheet jacket, 16
...Returning recording medium (e.g. magnetic sheet), 18...
...Magnetic recording head, 39...Head slider, 4
0,40a...Pushing means, 42...Electromagnet,
43...Plate spring, 49a, 49b...Coil spring.

Claims (1)

[Claims for Utility Model Registration] A release operating member having a first position for starting rotational drive of a magnetic sheet in response to a release pressing operation and a second position for capturing a subject image; A video signal processing circuit and a magnetic head that record video signals for one frame sequentially so as to record a circular track, and an electromagnet and an elastic member that act to bring the magnetic head and the magnetic sheet into contact with or apart from each other. The magnetic sheet is rotated in conjunction with the first position of the release operation member, and the magnetic head and the magnetic sheet are brought into contact with each other in conjunction with the second position, and a video signal is transmitted to the magnetic sheet. Still image recording camera.