JPS5938983A - Sheet pack device - Google Patents

Abstract

PURPOSE:To prevent the malfunction of a display part, by restricting and releasing the operation of the display part which displays the relative position of a record/reproduction head to a record sheet in response to the closing/opening operations of a dustproof shutter. CONSTITUTION:A lock member 11 is energized counterclockwise by a spring 13 when a proofdust shutter 4 covers over an opening part 10a, and therefore a lock part 11a of the member 11 presses a ratchet pawl 9 downward to restrict the turn of a counter 8. While a pack is loaded to a recording or reproducing device in the direction A, and the shutter 4 is slided in the direction B by an interlocking member 15. When the shutter 4 reaches the position shown an atternate long and two short dashes line, a detecting part 11b of the member 11 is pressed by the shutter 4 and turns clockwise against a spring 13 as shown by an alternate long and two short dashes line. Then the part 11a separates from the pawl 9, and the counter 8 can turn since the restriction by the pawl 9 is relesed.

Description

DETAILED DESCRIPTION OF THE INVENTION Jin's invention relates to a seat back device, and particularly to a seat back device housed in a rotating magnetic seat.

In a seat pack device equipped with a dust-proof shutter and a display section for displaying the relative position of a recording or reproducing head with respect to a recording sheet inside the seat back, the display section is prevented from being erroneously operated in connection with a seat back loading operation, etc. 〇Regarding conventional technology Sheet pack devices that store rotating recording sheets such as rotating magnetic sheets are equipped with a dustproof device to prevent dirt and dust from entering the pack and protect the recording sheets from being damaged. The dust-proof shutter is equipped with a display section that displays the entire relative position of the recording or reproducing head with respect to the recording track. opens an n-sized opening provided in a manner that brings the recording or reproducing head into 1r contact with the sheet;
When the sheet pack is not loaded into a recording or reproducing device, the opening is moved to close to enable signal conversion operation of the recording or reproducing head. In addition, in the case where recording tracks are formed concentrically on the recording sheet, the display section displays the number of recorded or reproduced tracks, and is used to display the number of recorded or reproduced tracks on the recording or reproduction apparatus main body. In the case where the recording track is formed in a spiral shape, the moving status of the recording or reproducing head (il-ff is 0) is displayed. As detailed above, if you accidentally touch the display part in connection with the loading operation, the display part will operate independently and you will not be able to tell the position of the recorded or played track. This method has the drawback of causing a malfunction such as double recording.

OBJECTS OF THE INVENTION Accordingly, the present invention provides a means for preventing malfunction of the display section with a simple configuration in a sheet pack device equipped with a dust-proof shutter and a display section that displays the relative position of the recording or reproducing head with respect to the recording track. ＾The purpose is to.

Structure of the Invention The present invention includes a dust-proof shutter (in a specific example described later, for example, the dust-proof shutter 4 in FIG. 2); a display section (also a counter 8) that displays the relative position of the recording or reproducing head with respect to the recording sheet; A sheet pack comprising: means for restraining or releasing the operation of the display unit in conjunction with the action of closing or opening the dust shutter (also means for restraining or releasing the operation of the p counter 8 using the locking member 11); Features a device.

In an embodiment of the present invention, the means for restraining or releasing the operation of the display section is a member that can move once, and locks the detection section (also the detection section 11b) of the hourly shutter and the display section. An embodiment including: a pin (also a pin 1lc) implanted in this rotatable member and formed so as to be operable from the outside; is allowed.

In the above, the citation of specific examples to be described later does not limit the scope of the present invention in any way, and the present invention can be modified as appropriate within the scope of the claims.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A conventional seat pack device and a seat pack device embodying the present invention will be described in detail below with reference to the drawings.

Regarding a conventional seat pack device (Fig. 1) Fig. 1 is a perspective view of a conventional seat pack device, with the upper half shown in the same figure (Al shows the upper half, and the lower half shown in the same figure (Bl). , the upper part is the lower half of the sheet pack device, 2 is a magnetic sheet which is a recording sheet, 3 is a sheet core, and the recording sheet 2 is fixed to the sheet core 3 If''L, rotated 9 times by a driving means (not shown). A dust-proof shutter 4 is formed in a U-shape as shown in the figure, and is positioned so that the recording sheet 2 is rotatably inserted into the gap 4a.
is slidable in the direction B in the figure between the guide portion 4b and the guide groove 1a formed on the seat back device, and the other is biased in the opposite direction by the spring 5, and the curve is normally The stopper 1b controls the position of the stopper 111. 6
It is installed in the housing of the bag with the guide roller of Hane 5.
Reference numeral 08 is a counter which is rotatably fitted to the shaft 6a and has one end hooked to a pin 7 implanted in the case of the bag 1. It fits into an opening formed in the body at a position facing this, and is rotatable.

When this sheet pack device is loaded into the recording or reproducing device main body, the key groove formed in the counter 8 engages with the shaft on the main body side, and the counter 8
rotates as the recording or reproducing head moves. 8b
is a gear formed on the outer periphery of the counter 8, which engages with the ratchet pawl 9. The ratchet pawl 9 has elasticity.

On the other hand, IO has an opening 10a for a recording or reproducing head, a sheet core phase opening bottom part 10b1, and an opening 10c for a counter in the upper half of the sheet pack device. Note that there is also an opening in the lower half at a position facing these openings.
However, the diagram is completely omitted in Figure 1 tBl.

Next, the operation of the apparatus shown in FIG. 1 will be explained. In this example, recording tracks are recorded concentrically on the recording sheet 2, and a 6o sheet pack, which will be explained as a fL-centered sheet pack, is loaded into a recording or reproducing apparatus. When not in use, the dust shutter 4 closes the opening 108, preventing dust from entering the pack from outside and protecting the sheet 2 from damage. /-Dopatsuku is recorded in the direction of the figure or (1) Ushiku (M
When loading Y fL, the protrusion 4c of the dust-proof shutter 4
engages with a locking member such as a pin (not shown) on the recording or reproducing device side, and the shutter 4 resists the force of one of the springs 5 and moves into the guide groove 1a.
Slide in direction B along. When the pack is completely loaded, the recording or reproducing head opening 10a is completely opened and the recording or reproducing head is in the raw state. The position in the recorded track to which recording or reproduction has been performed is displayed externally through the opening 10c, that is, each time the head advances.

The counter 8 rotates by one tooth of the gear 8b.
The number of tracks recorded in the recording system is indicated by an indicator (not shown) marked t' formed above and a scale 10d marked t' carved on the housing of the upper half 10 of the seat back.

By the way, in the conventional seatback loading operation (notebook loading operation, etc.), if the counter 8 is accidentally turned, the counter 8 rotates independently, and as a result, the track position ifj of recorded or played back cannot be determined. 9. There is a possibility of performing near recording on a track that has already been recorded.

About the seat back device embodying this invention (Second
The present invention attempts to eliminate the above-mentioned drawbacks of the conventional sheet hacking device and completely prevent malfunctions of the display section, and a specific example thereof is shown in FIG. Bi (B
) (tL-f: tt Perspective view of upper half and lower half) and Figure 3 (plan view for explaining operation). The components shown in Figure 1 basically have the same configuration and function as those in Figure 1, so their explanation will be omitted.・Rotation nJ to axis 12
A lock portion 11a is provided at one end of the lock portion rL, and a shutter detection portion 11b is provided at the other end as shown in 6 in the diagram below.
Tei013 is a spring.

One end is attached to the lock member 11 and the other end is attached to the batter's casing; An engaging member protruding from the main body engages with the protrusion 4c of the dustproof shutter 4, and slides the dustproof shutter 4 in the 87° direction as the bag is loaded.

11c is a pin embedded in the locking member 11, the head of which is inserted into the small elongated hole 1 provided in the upper half 1o of the seat pack device.
6 and can be operated from the outside. In addition, a cover is attached to the pin llc so as to cover the elongated hole 16.
This is because it is biased counterclockwise.

The et hook portion 11a presses the entire ratchet pawl 9 downward in FIG. 3, thereby restricting the rotation of the counter 8.

On the other hand, when the pack is loaded into the recording or reproducing device in the direction shown in FIG. , the detection part 11b of the locking member 11 is pressed against the dust-proof shutter 4, and rotates clockwise against the spring 13 (double-dashed line in FIG.
11n, the counter 8 is released from the restraint by the ratchet pawl 9 and becomes rotatable. Furthermore, by operating the pin 11ci from the outside and rotating the locking member 11c clockwise! 11. While the dustproof shutter 4 remains closed, the ratchet pawl 9 can be released from the lock portion 11a of the lock member 11, and the counter 8 can be moved all the way. This is advantageous in the following respects. For example, if you operate the sheet pack outside the device in advance to specify the recording or playback start position on the sheet before recording or playback, you may manually open all dust shutters 4 one by one and unlock the counter 1. ．． When setting the counter 8 to the desired track position, it is not only inconvenient to handle, but also because the dust shutter 4 opens, causing dirt and
However, with the above configuration, the dust shutter 4 can be kept closed and the counter 8 can be closed.
This kind of inconvenience does not occur because the controller can be operated. In addition, since the small elongated hole 16 is covered by a cover attached to the pin 11c, there is a gap to prevent dirt from entering through the elongated hole 16.

The case where recording tracks are formed concentrically on the recording sheet has been explained above, but even when recording tracks are formed spirally, the movement status of the recording or reproducing head is displayed by the counter 8. Effects of the Invention Based on the above-described structure and operation, the present invention provides a method for controlling the recording sheet of the recording or reproducing head in conjunction with the operation of closing or opening the dust-proof shutter. Since the operation of the display section that displays the entire relative position is constrained or released, the simple configuration of TO3 prevents the display section from operating even if you dare to touch the display section.

It is possible to record or reproduce accurately without creating an insertion between the recorded or reproduced track position on the recording sheet and the instruction on the display section.

[Brief explanation of drawings]

Figure 1 (A1 and (Bl) are perspective views showing the upper and lower halves of a conventional seatback device, and Figure 2 (A1 and (Bl) are perspective views of a seatback device embodying the present invention. 3 is a perspective view showing the upper and lower halves, and FIG. 3 is a plan view for explaining the operation of the device shown in FIG. 2. In the figure, 1 is the lower half of the seat back device, and 2 is a recording sheet. ,
4 is a dust-proof shutter, 4ca is its protruding part, 8 is a counter, 9 is a ratchet pawl, 10 is the upper half of the seat back device, 11 is a locking member, 11a is its locking part, 11b is its shutter detection part, llc is a lock A bottle is implanted in the member, 15 is an engaging member, and 16 is a long hole provided in the upper half of the seat back device. Patent applicant: Canon Co., Ltd.

Claims (2)

[Claims] (1) Dust shutter. a display section that displays the relative position of the recording or reproducing head with respect to the recording sheet; means for restricting or releasing the operation of the display section in conjunction with the fully closing or opening operation of the dustproof shutter; Metal seat back device. (2) the means for restricting or releasing the operation of the display section is a member that can rotate once and includes a detection section for the dust shutter and a lock section for the display section;
The seat pack device 0 according to claim (1), further comprising: an nfC pin implanted in the rotatable member and configured to be operated from the outside.