JPH0754605B2 - Electronic still camera recording device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device for an electronic still camera that records video signals and the like on a magnetic sheet.

2. Description of the Related Art A cassette with a built-in magnetic sheet used in an electronic still camera is provided with an accidental erasure prevention claw to protect recorded contents, and a recording device is always equipped with a switch for detecting the presence or absence of this claw. ing.

Problems to be Solved by the Invention However, in order to detect the presence or absence of the claw, it is necessary to insert a detection member inside the cassette. Therefore, when considering a detection member having a simple structure, the mounting direction of the cassette is limited. That is, it is essential that the movement direction of the detection member and the mounting direction are the same, the degree of freedom in device design is reduced, and it is not useful as a whole. Therefore, there is a demand for a device having a simple structure, which can increase the degree of freedom in design and obtain an efficient device.

Means for Solving the Problems According to the present invention, a cassette containing a recording medium and the cassette provided so as to be rotatable around a rotation shaft and inserted therein are mounted in an apparatus main body. A garage for rotating, a rotating plate provided with a switch for detecting the presence or absence of an erroneous erasure prevention claw provided on the cassette, and an elastic body for urging the rotating plate in one direction. The switch and the portion of the cassette where the erroneous erasure prevention claws are located near the rotation axis of the garage, and the protrusion provided on the garage when the cassette is inserted into the garage. The part is configured to rotate the rotating plate against the urging force of the elastic body and retract the switch from the insertion path of the cassette.

Effect of the Invention With the above-described structure, the present invention ensures that the switch for always detecting the presence or absence of the erroneous erasure prevention claw is retracted out of the movement path of the cassette during the operation of inserting the cassette into the garage and mounting the cassette by the garage. Therefore, it is not necessary to limit the mounting direction of the cassette by the garage. Therefore, the design of the device is not limited, and its simple configuration is very valuable.

Example Hereinafter, one example of the present invention will be described in detail with reference to the drawings.

1 (A) and 1 (B) are block diagrams of a recording apparatus according to the present invention. The cassette 1 has a shutter 2 that blocks a head insertion port (described later), and the shutter 2 can move in the direction of arrow 3. Therefore, insert cassette 1 into arrow 4
The shutter 2 is opened by the shutter opening / closing mechanism 6 by sliding it in the direction of and inserting it into the compartment 5. When the cassette 1 is ejected from the compartment 5, the shutter opening / closing mechanism 6 automatically closes the shutter 2. The compartment 5 is provided with a plurality of guide pieces 7a to 7f on the side where the cassette 1 is inserted so that the cassette 1 can be easily inserted. The garage 8 is located outside the compartment 5 and together with the base plate 9
It is pivotally supported by the upper support shafts 10a and 10b. The axial support direction is the insertion direction of the cassette 1, that is, the direction of arrow 4. Therefore, when the cassette 1 is inserted, it is slid with respect to the base plate 9. However, the sliding direction is parallel to the base plate 9, and there is no problem in interlocking with the slide plate A11. Slide plate B12 is slide plate A11
On the base plate 9, both slide on the base plate 9 in the cassette insertion direction to move the head 13 and eject the cassette 1. The two plates are attracted to each other by a spring 14. The bent portion 11a of the slide plate A11 engages with the cassette 1, moves in the direction of arrow 15 when inserted, charges the slider 16, and operates a two-stage structure claw (described later) by suction of the solenoid 17. The head 13 is moved. When the garage 8 is opened (the state is as shown in the figure, but the figure is wider than it actually is for explanation),
The opening spring 18 moves the hook plate 19 by engaging with the protrusion 19a thereof, disengaging the hook portion 11b of the slide plate A11, and the slide plate A11 is charged by insertion of the cassette 1 (described later). The force of moves in the direction opposite to arrow 15. By this movement, the bent portion 11a ejects the cassette 1 out of the compartment 5. Also slide plate A1
1 pushes the slide plate B12 at the same time to move the rack plate 12a of the slide plate B12 and the gear plate.
The motion is transmitted to the ratchet 23 via the gears 21 and 22 provided on the 20 and either comes into contact with an integrally provided cam (described later) or pushes up the cam follower 24 to move the slider 16 to initialize the head 13. Bring it to a position. The slider 16 includes slide shafts 27a and 27b held by slide blocks 25 by pressing springs 26a to 26c (26d will be described later) and adjusting screws (described later).
It moves along with and is spring biased to the cam side.

Since the spring 28 is hooked on the spring hook 29 of the base plate 9 and the spring hook 30 of the garage, the garage 8 always tries to open, and the spring 31 causes the spring 31 to move to the compartment 5.
Is urged away from the garage 8. Now insert the cassette 1 into the compartment 5 and insert the garage 8
If you close the compartment, the height of the compartment 5 is determined by the pin 32.
The cassette 1 until it comes into contact with the positioning hole 33
The a and 33b are fitted and positioned by the positioning pins 34a and 34b, and the height is determined by the two pins and the height determining pin 35. During this time, the switch 37 that engages with the erroneous erasure prevention claw 36 of the cassette 1 is pushed to the position where it does not engage with the cassette 1 by the protrusion 38 of the garage 8. After this,
When the garage 8 descends, the presser springs 39 hold the cassette 1 and the insertion springs 40 rotate the spindle 42 of the motor 41.
Push the center core (described later) into. Also, pad spring
The pad plate 44 held by the garage 8 by the 43 includes a pulse generator (hereinafter referred to as PG) 45 and a pad 46.
The pad height determining pins 47a, 47a,
47b contacts the pad 46, and the height adjusting screw 48 contacts the center portion (described later) of the spindle 42 for positioning.
After completion of these operations, the lock hole 49 of the garage 8 is engaged with the lock 50 to fix the garage 8. To release, the pressing portion 50a is pushed against the spring 51 so that the lock 50 is disengaged.

In this way, the cassette 1 is fixed on the base plate 9 and recording is performed by the head 13. The operation of each part will be described in more detail with reference to the drawings.

FIG. 2 is an explanatory view of the cassette 1 used. The built-in magnetic sheet 52 is attached to the center core 53.
The center core 53 is provided with positioning walls 54a, 54b, a positioning spring 55, and a PG yoke 56, and is positioned with respect to the spindle 42. As described above, the housing 57 has the positioning holes 33a and 33b, the positioning pins 34a and 34b, and the height determining pin 3
Positioned by 5. Reference numeral 58 is a window provided in the same shape on both sides of the housing 57 to expose the magnetic sheet 52 after the shutter 2 slides in the direction of the arrow 3 (2 '),
The pad height determining pins 47a and 47b also use the inside of the window 58. Five
9 is a label, which allows you to write down the date used and organize it. 36 erroneous erasure prevention claws are provided on the back side and are used to prevent accidental erasure of recorded contents or to prevent overwriting.

FIG. 3 shows the structure on the base plate 9. Fourth
FIG. 7 to FIG. 7 are explanatory diagrams of each constituent element, which will be described with reference to the above drawings. 4 is a view from the X direction of FIG. 3, FIG. 5 is from the Y direction, and FIGS. 7 (A) and 7 (B) are from the Z direction. The slide plate A11 moves in the direction of arrow 15 against the spring 60 by the cassette 1 and is held by the hook plate 19 in a charged state (11 'in FIG. 4). When the garage 8 descends, the hook plate 19 does not move because the open spring 18 bends, but when it rises, the hook plate 19 is
It moves against 61 and disengages from the hook 11b,
Moves in the direction opposite to arrow 15. Slide plate B12 is spring 14
Causes the slide plate A11 to be attracted to each other.
It moves in unison with the power of 60. This movement rotates the gear 62 integrally provided with the ratchet 23 via the rack portion 12a and the gears 21 and 22 as described above, and also rotates the cam 63. FIG. 6 (A) shows the state at this time, and the pointer 64 is engaged with the ratchet 23, but since the ratchet 23 rotates in the direction of arrow 66 with respect to the shaft 65, it moves like 64 '. The ratchet 23 can be rotated. 67 is a counter lever, which shares the shaft 68 with the pointer 64 and has its end 67a
Is pulled by a spring 69 and urged in a clockwise direction, and the other end portion 67b is in contact with the stopper portion 70 of the base plate 9. The counter lever 67 is configured to sandwich the pointer 64 from above and below and includes a spring 71 to urge the pointer 64. The protrusion 64a of the pointer 64 is a ratchet on the claw 64b
Since it abuts against the stop 23, a gap d is formed between the end portion 67a and the end portion 67a. Since these spring forces are small, movement of the slide plate A11 does not impose a great load. That is, the head 13 can be easily moved to the initial position without requiring a mechanism for separating the claw portion 64a from the ratchet 23. Cam as above
The rotation of 63 pushes up the cam follower 24 and gives the slider 16 a kinetic force in the direction of arrow 73 via the adjusting plate 72 to move the head.
Move 13 The head 13 is screwed to the slider 16. Slide plate A11 that moves with the force of spring 60
The movement of is stopped at a predetermined position by the stopper 74,
That state is retained. That is, each time the garage 8 is opened, the cassette 1 is ejected, the head 13 is moved to the initial position and reset. For this reason, when the cassette 1 is replaced, it is not necessary to return the head 13 to the initial position, and the mechanism is simplified and power consumption is saved.

Now, when a new cassette 1 is inserted in this state, the fourth
As shown in the figure, the insertion direction becomes parallel to the base plate 9, and the slide plate A11 moves in the arrow direction to
It reaches 1'and stops. But slide plate B12
As shown in FIG. 6 (A), the pointer 64 and the ratchet 23 are engaged and cannot move, the spring 14 is stretched, and a biasing force is applied to the slide plate B12 in the direction of the slide plate A11, that is, in the direction of arrow 15. To be As described above, this force exists until the garage 8 is opened and the slide plates A11 and B12 contact each other, and is a force in the direction of arrow 75 in FIG. 6 (B). Therefore, the ratchet 23 is stable in the state shown in FIG. The slider 16 is also a spring
By 95, it is stable because it is in contact with the cam 63, and the head 13
Determine the position of. This charging force resists the springs 14 and 60, but the spring 14 resists the contact frictional force between the cam 63 and the cam follower 24 by the spring 95 and can rotate the ratchet 23. Requires a frictional force between the pointer 64 and the ratchet and a force capable of moving the slide plate A11 while ejecting the cassette 1 while pushing up the cam follower 24 as before. Therefore, although a little large force is applied, since it is performed by the inserting operation of the cassette 1, that is, the operation by a human hand, or the force obtained from a mechanism outside the apparatus, it does not burden the apparatus at all and simplifies it. It does not interfere with miniaturization. Moreover, the spring 14 only gives a force to draw the two plates,
Its size does not affect the spring 60. That is, the charging force is not increased unnecessarily, and the discomfort to the hand when the cassette is inserted and the burden on other mechanisms are small. Further, by making the axial support direction of the garage 8 and the compartment 5 the same as the sliding direction of the cassette 1, this cassette insertion force can be easily adjusted.
It can be used for the upper sliding force and does not require a conversion mechanism. Further, by organically linking the movement and positioning operation of the head 13 with the cassette insertion / ejection operation, an extremely efficient and simple mechanism is realized.

Under these circumstances, the solenoid 17 is energized. As shown in FIG. 6 (B), the solenoid shaft 76 is attracted,
Move in the direction of arrow 77. For this reason, pin the counter lever 67
Rotate counterclockwise against spring 69 via 78.
The end portion 67a comes into contact with the protrusion 64a of the pointer 64, and similarly rotates the pointer 64. At this time, the claw of the counter lever 67
67b moves to a position where it engages with the ratchet 23, and then the claw portion 64b of the pointer 64 separates from the ratchet. Since the ratchet 23 has the urging force in the direction of the arrow 75 as described above, it rotates until it comes into contact with the pawl portion 67b. This rotation amount is set so that the claw portion 64b crosses the ratchet 23 by one mountain. Then, turn off the power to the solenoid 17,
The spring 69 is used to restore the state of FIG. 6 (A) again. At this time, the ratchet 23 has advanced one mountain and the cam 63
This causes the slider 16 to move. In this way the head
The solenoid 13 is moved one track at a time for energizing the solenoid 17. The attraction force of the solenoid 17 only needs to resist the frictional force between the ratchet 23 and the pointer 64 due to the biasing force of the spring 69 and the direction of the arrow 75, and an extremely small force is required. Therefore, it is possible to reduce the size and power consumption of the solenoid 17. Greatly useful.
Moreover, the circuit configuration is simple because it is sufficient to turn on and off the power. This movement of the head 13 is carried out in the direction opposite to the arrow 73 in FIG. 3 and moves to 13 '. In addition, since the pointer 64 and the counter lever 67 have a two-stage configuration, a gap d is provided between the counter lever 67 and the pointer 64 when the head 13 is positioned, that is, the ratchet 23 is positioned, and the counter lever 67 is It is possible to keep the accuracy without affecting. Further, when the head 13 is returned to the initial position, the pointer 64 is independently moved, and when the head 13 is sent, it is integrally moved to prevent the mechanism from becoming complicated.

The head 13 is fixed to the slider 16, and the two slide shafts 27a, 27 which are guide members of the slider 16 are provided.
b is constructed as shown in FIG. 7 (B). The slide shaft 27a is inserted into the engagement hole 16a of the slider 16.
79 is a bush. The slide shaft 27b is fitted in the engagement groove 16b, and the slide shaft 27a determines up and down and left and right, and 27b determines up and down. Therefore, the slide shaft 2
As shown in the figure, 7a is held on the slide block 25 by two adjusting screws 80 and 81 and a pressing spring 26b, and its vertical and horizontal positions can be adjusted (the other end has a similar structure. .). The slide shaft 27b is held by an adjusting screw 82 and a pressing spring 26c, and its vertical position can be adjusted (the other end has the same configuration). Head like this
The position of 13 makes it possible to completely adjust delicate up, down, left, right, tilt, etc. with respect to the motor 41 over the entire stroke thereof, and is very effective in contact with the magnetic sheet 52 and maintaining track accuracy. Further, the positional relationship between the cam 63 and the slider 16 can be adjusted by the adjusting plate 72, and the position of the head 13 can obtain sufficiently high performance without requiring high precision other than the cam 63 and the ratchet 23. You can

On the other hand, the structure of the garage 8 and the like will be described with reference to FIGS. 8 (A), (B) and FIG. This is a view seen from the Y direction in FIG.

In FIG. 8, (A) is an open state and (B) is a cassette 1.
Is set in the motor 41. As seen in FIG. 5, two positioning pins 34 for positioning the cassette 1
The a and 34b are located far from the rotating shafts of the garage 8 and the compartment 5 connecting the support shafts 10a and 10b, and it is the motor 41 and the pad 46 that affect the attachment and detachment of the cassette 1. As shown in FIG. 8 (A), in this embodiment, these members are also used in the cassette 1 depending on the axial direction of the garage 8 and the position of the pad 46 entering the window 58 of the cassette 1. However, it is configured so that it can escape with the opening angle reduced. That is, when the cassette 1 is detached, the opening angle thereof is minimized to prevent intrusion of dust or the like and contact with the inside by fingers or the like. The opening angle of the garage 8 is determined by the contact with the member having the support shaft 10b, and the compartment 5 with respect to the garage 8
The opening angle of the is determined by the protrusion 83 of the compartment 5. Now, in the movement from FIG. 8 (A) to FIG. 8 (B), the insertion spring 40 is located above the compartment 5 so that the cassette 1 can be attached and detached in (A). When the garage 8 is lowered as it is, the cassette 1 is set to the motor 41 while the relative angle between the garage 8 and the compartment 5 is held by the spring 31. The center core 53 is inserted into the spindle 42, but at that time, there is some resistance, and the insertion may be incomplete. After compartment 5 has stopped,
Only the garage 8 continues to descend, and the insertion spring 40 presses the center core 53 to securely push it into the spindle 42. Further, when the garage 8 is rotated downward, the upper protruding piece 84 of the compartment 5 and the insertion spring 40 come into contact with each other. Therefore, the tip 40a is separated upward from the center core 53, as shown in FIG. 8B, and does not become a load for rotating the center core 53. As described above, the insertion spring 40 provided in the garage 8 has a simple structure of one leaf spring, but can securely insert the center core 53 into the spindle 42.
It is possible to perform the separating operation thereafter, which is valuable.

Similarly, by the pad spring 43 provided in the garage 8,
Pad plate 44 biased to the base plate 9 side
As shown in the figure, the height of the PG 45 and the pad 46 arranged in the same are precisely determined by the pad height determining pins 47a and the like.

FIG. 9 shows a state in which the position of the pad plate 44 is fixed. The pad 46 has two pad height determining pins 47a and 47b.
The height is decided by abutting against. On the pad plate 44, a height adjusting screw 48 is spring-loaded at a position corresponding to the central portion 85 of the motor 41.
It is equipped with being urged at 86 to absorb backlash. This height adjustment screw 48 is the last one and the pad plate 4
4, the height of the pad 46 and the PG 45 is accurately determined. The plane position is already determined by the pad spring 43.

As a result, the contact between the head 13 and the magnetic sheet 52 and the PG pin
The relationship between the 87 and the PG yoke 56 is also surely guaranteed, and the recording performance can be made sufficient. The PG yoke 56 is provided integrally with a magnetic plate 89 that is attached to the magnetic sheet 52 and is in contact with the pedestal portion 88 of the motor 41. The magnetic plate 89 is attracted to perform positioning and transmission of rotational driving force. The magnetic force of the magnet 90 is transmitted to the PG pin 87. This is detected by the coil 91 and used as the PG output.

Finally, the movement of the switch 37 will be described with reference to FIGS. 10 (A) and 10 (B).

As described above, when the cassette 1 is attached or detached, all the parts that prevent it are retracted out of the path. However, the incorrect recording prevention pawl 36 is located near the axis of the garage 8 and its switch 37
Is also in the vicinity, so it is necessary to move from the normal detectable position. This can be seen in Figure 10 (A). Therefore,
As shown in (B), when the garage 8 is opened, the protrusion 38 is moved against the spring 93 for urging the switch plate 92 provided with the switch 37 to move the cassette in the arrow 15 direction or in the opposite direction. Configure so that it does not interfere with the slide of 1. The switch plate 92 is axially supported by a shaft 94 on a side wall portion (not shown) of the base plate 9 and abuts on the base plate 9 to be fixed in position. Then, as described above, it is moved from this state so as not to disturb the slide of the cassette 1. Therefore garage 8
Since it is not necessary to consider the switch 37 in determining the shaft support direction of,
The degree of freedom in design is increased, and other advantages can be utilized, which is effective.

As is apparent from the above description, the recording device of the electronic still camera according to the present invention has the detection switch of the erroneous erasure prevention claw that always inserts the cassette into the garage and always mounts the cassette by the garage. Since it is retracted to the outside of the movement route, the operation direction is not limited, and thus the degree of freedom in design is increased, and the entire device can be designed very efficiently. In other words, it is a very significant invention in pursuing reduction in size and weight and simplification.

[Brief description of drawings]

1 (A) and 1 (B) are configuration diagrams of a recording apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory view of a cassette used in the apparatus, and FIG. 3 is an explanatory view of main parts of the apparatus. 4, FIG. 4 is an explanatory view of main parts seen from the X direction in FIG. 3, FIG. 5 is an explanatory view of main parts also seen from the Y direction, and FIGS. 6A and 6B are main parts of the apparatus. Explanatory drawings, FIGS. 7 (A) and 7 (B) are explanatory views of main parts similarly seen from the Z direction in FIG. 3, and FIGS. 8 (A), (B) and 9 are all seen from the same Y direction. FIG. 10 (A) and FIG. 10 (B) are main part explanatory views of the apparatus. 1 ... Cassette, 8 ... Garage, 10a, 10b ... Support shaft, 28 ... Spring, 36 ... Erase prevention tab, 37 ...
Switch, 38 ... Protrusion, 49 ... Lock hole, 50 ... Lock, 51 ... Spring, 52 ... Magnetic sheet, 92 ... Switch plate, 93 ... Spring, 94 ... Axis.

Claims (2)

[Claims] 1. A cassette containing a recording medium, and a garage which is provided so as to be rotatable about a rotation axis and which is mounted inside the apparatus main body to rotate the cassette. A rotation plate provided with a switch for detecting the presence or absence of an erroneous erasure prevention claw provided in the cassette; and an elastic body for urging the rotation plate in one direction, near the rotation shaft of the garage. The switch and the portion of the cassette where the erroneous erasure prevention claws are located, and in the state where the cassette is inserted into the garage, the convex portion provided on the garage causes the rotating plate to move. A recording apparatus for an electronic still camera, wherein the switch is retracted from an insertion path of the cassette by rotating the elastic body against an urging force. 2. The electronic still camera according to claim 1, wherein the garage is provided with a lock mechanism that is biased in a direction to open the cassette and is held in a state where the cassette is mounted. Recording device.