JPH035015Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a regulating plate used in magnetic recording devices and magnetic reproducing devices to stabilize the contact pressure between a magnetic sheet and a magnetic head. The present invention relates to a magnetic recording/reproducing device having a moving mechanism.

[Prior art]

When recording still images, it is common to use a photographic camera that uses silver halide photographic film as a recording medium, but recently, electrophotographic cameras that use magnetic sheets as a recording medium have been proposed. Such an electrophotographic camera is comprised of an imaging device that takes an image of a subject, and a magnetic recording device that modulates an electrical signal obtained from the imaging device into a video signal and magnetically records it on a magnetic sheet.

The magnetic recording device may include, for example, the U.S. Pat.
As described in Publication No. 201696, a loading device is provided to accurately position the magnetic sheet pack at a predetermined loading position and to attach the magnetic sheet to a spindle driven by a motor with high precision. There is. That is,
After inserting the magnetic sheet pack into the pack holder,
By closing the loading door, the pack holder is brought into the loading position within the device body and locked there. In this loading position, the magnetic sheet is mounted on the spindle and the magnetic head is in contact with the recording surface of the magnetic sheet. During shooting, the magnetic sheet is rotated by a spindle at 3600 rpm, and during this rotation, the video signal for one field is approximately 0.06 mm
Field recording is performed on one wide magnetic track. Incidentally, in order to constitute one frame of a recorded image, field recording may be performed on two magnetic tracks.

In this way, magnetic recording is performed while the magnetic head is in contact with the magnetic sheet that is rotating at high speed, so the contact pressure (per head) between the magnetic head and the magnetic sheet must be kept constant during that time. There is. For this reason, a regulating plate is used which is approached from the back side of the magnetic sheet so as to face the magnetic head. This regulation plate is attached to the inside of the door, and as the door is closed, the regulation plate approaches the back side of the magnetic sheet through the opening provided in the pack holder, and the door is locked. In this state, it is positioned at a predetermined position. Furthermore, as the door is opened, the regulating plate separates from the back surface of the magnetic sheet as the door moves, and as the door is further moved relative to the pack holder, the regulating plate also retreats from inside the pack holder, causing the magnetic sheet pack to move away from the rear surface of the magnetic sheet. You will be able to take out and load.

As shown in FIG. 3, the regulating plate has a plane 40a positioned parallel to the surface of the magnetic sheet, and a plane 40a formed within this plane and extending in accordance with the feeding movement direction of the magnetic head. It is provided with a depression 40b. When positioning the regulating plate close to the surface of the magnetic sheet,
In addition to positioning the flat surface 40a of the regulating plate parallel to the surface of the magnetic sheet at a predetermined interval, the extending direction of the recess 40b is aligned with the feeding direction of the magnetic head, and the width direction of the recess 40b is It is necessary to accurately position the magnetic head so that it is centered. Furthermore, in order to maintain good contact with the head, strict requirements are placed on the positioning of the regulating plate not only in the height direction but also in the in-plane direction, and the regulating plate must be positioned with high accuracy on the order of microns.

Therefore, in order to position the regulation plate,
A positioning pin is formed in the main body of the device, and a plurality of holes (usually two holes) are formed in the regulation plate to fit the positioning pins, and when the door is locked in the loading position, The positioning pin is configured to accurately fit into the fitting hole of the regulating plate including the fitting depth direction.
With this configuration, the regulating plate can be accurately positioned not only in the in-plane direction but also in the vertical direction. The matching accuracy must be kept extremely high.

However, in the conventional technology, the door that supports the regulation plate is pivoted to the main body of the device and is opened and closed by rotating with respect to the main body of the device, so the regulation plate does not move when the door rotates. The magnetic sheet is moved close to the surface of the magnetic sheet while rotating with the magnetic sheet. Therefore, the regulation plate is brought closer to the intended positioning surface while being inclined. For this reason, the fitting hole on the regulating plate side is fitted at an angle to the positioning pin provided on the main body of the device.
If the fitting accuracy between the positioning pin and the fitting hole of the regulating plate is made high, a problem arises in that fitting becomes difficult. To deal with this, if you try to press the regulation plate against the positioning pin with a strong biasing force to make them fit together, the biasing force will deform the regulation plate or the holder that supports the regulation plate. , the relative position of the regulating plate with respect to the surface of the magnetic sheet will change. Moreover, if these fitting portions are allowed to have some play for the fitting, it becomes difficult to position the regulating plate with high precision. Furthermore, since the mating and unmating process is repeated each time the magnetic sheet pack is loaded and unloaded, if the mating hole is always tilted in a certain direction with respect to the positioning pin when it is mated and unmated, one side of the mating part This side will wear more easily and play will occur in the fitting part.

From the above, if the positioning of the regulating plate in a magnetic recording device is incorrect, the relative position of the regulating plate with respect to the magnetic sheet or magnetic head will vary, and the contact pressure between the magnetic head and the magnetic sheet will fluctuate, making it difficult to properly position the regulating plate. It becomes impossible to maintain proper magnetic recording operation. Furthermore, in a magnetic reproducing device, if the regulating plate is not properly positioned as described above, proper magnetic reproducing operation cannot be performed.

[Purpose of invention]

The present invention was devised in view of the above-mentioned drawbacks of the conventional device, and is designed to precisely position a regulating plate that approaches the surface of a magnetic sheet at a predetermined position during magnetic recording and magnetic reproduction, and to maintain the control plate at a predetermined position. It is an object of the present invention to provide a regulating plate moving mechanism that enables the following.

[Structure of the idea]

The present invention focuses on the fact that in conventional magnetic recording/reproducing devices, the door holding the regulating plate was simply rotated and locked in the loading position, which caused the above-mentioned drawbacks. Immediately before the door is locked in the loading position, a guide means is provided to guide the movement of the door perpendicularly to the magnetic sheet surface, and while the door is being moved perpendicularly to the magnetic sheet surface, a guide means is provided to guide the movement of the door perpendicularly to the magnetic sheet surface. Guide pins protruding from the main body of the device are engaged with positioning holes formed at multiple locations, and these engagements position the regulation plate holder in a plane parallel to the magnetic sheet surface, and simultaneously position the regulation plate holder. The guide is configured such that the moving direction of the magnetic sheet is perpendicular to the surface of the magnetic sheet.

[Configuration of Example]

In FIGS. 1 and 2 showing an embodiment of the present invention, an actuating plate 2 fixed to a loading door 1 has L-shaped guide slots 3a,
3b is formed. Guide pins 5a and 5b planted on the side surface of the holder base 4 provided inside the door 1 are inserted into the guide slots 3a and 3b. Therefore, the holder base 4 is movable relative to the door 1 in the vertical and horizontal directions in FIG. Further, the pack holder 6 into which the magnetic sheet pack 7 is inserted is fixed to the holder base 4 and is moved together with the holder base 4.

The operating plate 2 has pins 11 to 13 that act as guide pins when the door 1 is opened and closed, and a lock pin 15 that locks the door 1 at the loading position. The pins 11 to 13 and the lock pin 15 are configured to be inserted into respective slots 19 to 21 and openings 22 formed in the support plate 18 fixed to the main body 50 (see FIG. 2). In addition, the pin 13 and the support plate 1
An opening spring 28, which is applied between the door 1 and the door 8, urges the door 1 toward the open or unloading position shown in FIG.

A lever 24 rotatably pivoted to the support plate 18
A long hole 24a is formed at the free end of the holder base 4, and a guide pin 5a installed in the holder base 4 is inserted therethrough. A torsion coil spring 25 is hung between the lever 24 and the support plate 18. The torsion coil spring 25 has one fulcrum moved relative to the other by the rotation of the lever 24, so that it can bias the lever 24 clockwise or It acts as a toggle spring that biases counterclockwise. Also,
A locking lever 26 pivotally mounted on the support plate 18 locks the door 1 in the loading position by engaging the locking pin 15 in response to the operation of the control pin 27. Note that the control pin 27 is pressed after the door 1 is pushed beyond the loading position.
The locking pin 15 is operated by returning to the loading position again to lock the locking pin 15.

A center core 31 is located in the center of the magnetic sheet 30 rotatably stored in the magnetic sheet pack 7.
is fixed, and this center core 31 is attached to the spindle 3.
2 (see FIG. 2), and the magnetic sheet 30 is rotated by driving the motor 52.
The shutter 33, which is provided so as to be slidable on the magnetic sheet pack 7, is opened by inserting the magnetic sheet pack 7 into the pack holder 6.
The magnetic head 35 can come into contact with the recording surface of the magnetic sheet 30.

As is clear from FIG. 2, which shows the state in which the magnetic seat pack 7 is inserted into the pack holder 6 and the door 1 is locked in the loading position, in this state, the magnetic seat pack 7 is inserted into the pack provided inside the actuating plate 2. It is pressed downward by a presser spring 37 and comes into contact with a positioning pin 38 fixed to the device main body 50, thereby achieving accurate positioning in the loading state. Further, as shown in FIG. 3, the regulating plate 40, which is approached to the upper surface of the magnetic sheet 30 from the opposite side of the magnetic head 35, has a plane 40a parallel to the surface of the magnetic sheet 30.
and a recess 40b facing the magnetic head 35. The magnetic head 35 is located at the center of the recess 40b in the width direction.

This regulation plate 40 is a regulation plate holder 4 attached to the inner surface of the actuating plate 2 via a pressure spring 42.
It is fixed at 1. At the loading position, the positioning pin 43 protruding from the device body 50 is fitted into the positioning hole 46 formed at the lower part of the regulation plate holder 41.
The regulating plate 40 is accurately positioned in the in-plane direction and in the height direction with respect to the magnetic sheet 30 and the magnetic head 35.

Further, the holding pin 45 is attached to the actuating plate 2 via the spring 44, and the door 1 can be overstroked in the closing direction beyond the loading position. The pin 45 presses the center core 31. Further, when the pressure on the door 1 is released from the overstroked state, the holding pin 45 is released from the center core 31, and the door 1 is returned to the loading position.

In addition, in FIG. 2, the reference numeral 47 indicates the spindle 3.
The center core 31 is completely attached to the spindle 32 by attracting the metal plate 48 fixed to the center core 31 of the magnetic sheet 30.
Further, reference numeral 49 connects the magnetic head 35 to the magnetic sheet 3.
The reference numeral 52 designates a motor fixed to the main body 50 of the apparatus for driving the spindle 32.

[Effect of the embodiment]

The operation of the above-described configuration is performed as follows. First, when the door 1 is opened to the unloading position as shown in FIG. 1, the pack holder 6 protrudes outside the contour of the door 1, and the magnetic sheet pack 7 is inserted through the opening 8 of the pack holder 6. In addition, the torsion coil spring 25, which has one fulcrum fixed to the support plate 18 and the other fulcrum fixed to the lever 24,
4 is rotated clockwise, providing an auxiliary biasing force for lifting the holder base 4 and pack holder 6 upward.

Note that when the door 1 is in the unloading position, the door 1 is in a position separated from the holder base 4, so that the regulating plate 40, pack presser spring 37, and presser pin 45 attached to the inside of the door 1 etc. have been evacuated from inside the pack holder 6, and therefore the magnetic sheet pack 7 is removed from the pack holder 6.
It does not interfere with insertion.

After that, when the door 1 is pushed against the opening spring 28, the pin 13 implanted in the actuating plate 2 is located in the arc-shaped part of the slot 21, so the door 1 moves clockwise around the pin 12. It will be rotated in the direction. At the same time, the lever 24 is rotated counterclockwise around the shaft 23, so that the guide pin 5a inserted into the long hole 24a provided at the free end of the lever 24 is inserted into the actuating plate 2. It is pushed down along the formed guide slot 3a. As a result, the holder base 4 and the pack holder 6 provided integrally therewith
is moved downward as shown in FIG. 5 while being guided by the other guide pin 5b and guide slot 3b.

As door 1 is rotated and closed in this way, the fifth
As shown in the figure, the pin 13 comes into contact with the lower edge of the slot 21, thus stopping the door 1 from rotating clockwise. In this state, the holder base 4 and the pack holder 6 are in the lowest position, and their upper edges are within the contour of the upper edge of the door 1. Also, in the process of rotating the lever 24 to the position shown in FIG.
One fulcrum of the torsion coil spring 25 fixed to this lever 24 is on the right side of the other fulcrum fixed to the support plate 18, so the lever 24
4 is rotated counterclockwise by this torsion coil spring 25, and therefore the holder base 4 and the pack holder 6 are moved toward the right in FIG. 5 (downward in FIG. 2). Pressed.

In this state, as shown in FIG. 9, the regulation plate holder 41 is directly facing the device main body 50, and therefore the positioning hole 46 formed in the regulation plate holder 41 is
is opposed to the positioning pin 43 of the device main body 50.

When door 1 is further pushed, pins 11-13,
Due to the relationship with slots 19 to 21, door 1 is the 6th slot.
Move horizontally as shown. When the door 1 is moved horizontally, the pack holding spring 3 first
7 begins to push the magnetic sheet pack 7, the holder base 4 and the pack holder 6 initially move slightly together with the door 1, but soon after that the magnetic sheet pack 7 comes into contact with the positioning pin 38 provided on the device body 50, and is positioned there. be done. Therefore, when the door 1 is further moved horizontally, the door 1 approaches the pack holder 6 while bending the pack pressing spring 37.

At the same time, the regulating plate holder 41 is horizontally moved rightward from the position shown in FIG. 9, so that the regulating plate 40 enters the magnetic sheet pack 7 through the opening 39 formed in the pack holder 6. It approaches the magnetic sheet 30. A positioning hole 46 formed in the regulation plate holder 41
A positioning pin 43 provided on the main body 50 of the device is fitted into the positioning pin 43, thereby positioning the regulating plate holder 41 and stopping its movement. This regulation plate holder 4
1 is perpendicular to the surface of the magnetic sheet 30 at the loading position, that is, the positioning surface determined by the positioning pin 43, so that the positioning pin 43 and the positioning hole 46
The fitting is very smooth, and even if the accuracy of the fitting is set strictly, the fitting can be achieved without strain.

When the door 1 is further pushed in, the pack holder 6 and the regulation plate holder 41 which have already been positioned
The door 1 is approached, and the door 1 is overstroked beyond the loading position shown in FIG. 2 to a position where the pins 11 to 13 abut the terminal ends of the slots 19 to 21 (see FIG. 7). ).
During this time, the holding pin 45 presses the center core 31 of the magnetic sheet 30, so that the center core 31 is chucked by the spindle 32. Note that the pack pressing spring 37 and the pressing spring 42 of the regulating plate holder 41 are in a state of being bent in accordance with the movement of the door 1.

Then, when the pressure on door 1 is released,
The door 1 is returned to the loading position shown in FIG. 8 by the release spring 28. As a result, the holding pin 45 is separated from the center core 31, the control pin 27 is operated via an interlocking mechanism (not shown) that is linked to the return operation of the door 1, and the lock lever 26 is engaged with the lock pin 15. Door 1 will now be locked in the loading position shown in FIG. At this point, the pack presser spring 3
7. The pressing spring 42 weakens the pressing force on the magnetic sheet pack 7 and the regulating plate holder 41, respectively, but the magnetic sheet pack 7 and the regulating plate holder 41 are positioned by the pack pressing spring 37 and the pressing spring 42, respectively. Since it is pushed toward the pins 38 and 43, as shown in Figure 2,
These positionings are maintained.

After the door 1 is thus locked in the loading position and a predetermined magnetic recording operation has been performed, an eject button (not shown) is operated to take out the magnetic sheet pack 7. As a result, the control pin 27 is moved upward and the lock lever 26 is rotated clockwise, so that the engagement of the lock pin 15 is released, and the door 1 is first moved horizontally to open by the biasing force of the opening spring 28. However, after the pin 12 contacts the front edge of the slot 20, it is rotated counterclockwise to the unloading position shown in FIG. When the door 1 is rotated in the opening direction in this manner, the lever 24 is rotated clockwise in conjunction with this rotation, so that the pack holder 6 and the holder base 4 protrude upward and outside the outline of the door 1.

After taking out the magnetic sheet pack 7 from the pack holder 6, remove the magnetic sheet pack 7 to be used next.
However, in the unloading position where the door 1 is opened, the pack holder 6 is in a state of protruding outside the contour of the door 1. Therefore, the location where the magnetic sheet pack 7 is to be loaded can be easily identified because there is no other gap or the like where the magnetic sheet pack 7 can be loaded.

Although the present invention has been described based on the illustrated embodiment, the present invention is not limited to this. For example, the positioning pin 43 may be provided on the regulation plate holder 41 side, and the fitting hole 46 may be provided on the device main body side, or the regulation plate holder 41 may be supported on another member instead of being supported on the door 1, and the regulation plate holder 41 may be supported on another member. This may be moved via an interlocking mechanism. In addition, as for the method of moving the door 1, it is also possible to omit the movement by rotation in the above embodiment.

In addition, a spring for ejecting is provided in the pack holder 6, and a magnetic sheet pack 7 is installed in the holder base 4.
If a locking lever is provided for holding the magnetic sheet pack 7, the magnetic sheet pack 7 can be taken out even more easily by configuring the locking lever to be released in conjunction with the opening of the door 1.

[Effect of idea]

As described above, according to the magnetic recording/reproducing apparatus of the present invention, the movement of the door that is opened and closed when loading a magnetic sheet pack is perpendicular to the surface of the magnetic sheet at least immediately before it is locked in the loading position. The regulation plate holder is guided in such a manner that the door is moved perpendicularly to the magnetic sheet surface, and a plurality of guide pins protruding from the main body of the device are engaged with the positioning holes of the regulation plate holder. In addition to positioning the regulating plate holder in a plane parallel to the magnetic sheet surface, the movement direction of the regulating plate holder is guided perpendicular to the magnetic sheet surface, making it possible to maintain high engagement accuracy between the positioning hole and the guide pin. It becomes possible. In addition, since these engaging portions hardly wear out, the inconvenience of engagement looseness occurring over repeated use is eliminated.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing an embodiment of the present invention. FIG. 2 is a bottom sectional view of the embodiment shown in FIG. FIG. 3 is a schematic view of the regulation plate and the regulation plate holder viewed from below in FIG. FIG. 4 is a sectional view taken along line AA in FIG. 3. FIGS. 5 to 8 are explanatory diagrams for explaining the operation of the above embodiment. FIG. 9 is an explanatory diagram showing the position of the regulating plate holder after the door is rotated in the above embodiment. DESCRIPTION OF SYMBOLS 1... Door, 2... Operating plate, 4... Holder base, 6... Pack holder, 7... Magnetic seat pack, 18... Support plate, 24... Lever, 25...
Torsion coil spring, 26...Lock lever, 30...
. . . Magnetic sheet, 31 .

Claims (1)

[Scope of Claim for Utility Model Registration] In a magnetic recording/reproducing device that positions a regulating plate facing a magnetic head and approaching the back side of a magnetic sheet when a door is locked in a loading position, the regulating plate is fixed. A regulating plate holder is installed between the door and the main body of the device and is attached to the door via a pressure spring, and the regulating plate holder is provided between the door and the device body to prevent the door from moving perpendicularly to the surface of the magnetic sheet just before it is locked in the loading position. A guiding means is installed in the main body of the device, and engages with positioning holes formed at multiple locations in the regulating plate holder while the door is moved perpendicularly to the magnetic sheet surface, and magnetically moves the regulating plate holder. A magnetic recording/reproducing device comprising a plurality of guide pins that position the regulating plate holder in a plane parallel to the sheet surface and guide the movement direction of the regulating plate holder perpendicularly to the magnetic sheet surface.