JPH0556589B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION -Field of Industrial Application- The present invention relates to a magnetic recording/reproducing device using a magnetic sheet, and particularly to a magnetic sheet drive device of the magnetic recording/reproducing device.

-Background of the Invention- As is well known, in a magnetic recording/reproducing device such as a still video camera that uses a magnetic sheet such as a floppy disk, the magnetic sheet body is inserted into a drive shaft for driving the sheet of the device body during use.
The state of use is achieved by closing the lid covering the magnetic sheet main body. Therefore, such a magnetic recording/reproducing device requires a positioning structure for accurately positioning the magnetic sheet body with respect to the device body, and a positioning structure for accurately positioning the magnetic sheet body with respect to the device body, and a positioning structure that allows the magnetic sheet body to To prevent accidental removal, it is necessary to provide a locking structure to hold the lid in the closed position.

That is, FIG. 5 shows a conventional magnetic recording/reproducing apparatus, which includes a magnetic sheet holder 4 that moves in conjunction with a lid 3 that is pivotally supported by a shaft 2 on one side with respect to the main body of the apparatus. A positioning hole h is formed in the protective jacket 6 of the magnetic sheet main body 5 used in this magnetic recording/reproducing device, and the magnetic sheet is inserted into the inside of the device main body corresponding to the positioning hole h. Positioning pins 7 are projected, and these positioning means determine the position of the magnetic sheet body 5 held by the magnetic sheet holder 4 with respect to the apparatus body, and the magnetic sheet body 5 is inserted into the drive shaft 8 of the sheet drive motor M. That will happen. Further, in order to lock the lid 3, a lock pin attached to the inner surface of the open end of the lid 3 is fixed, and a spring 10 is attached to the open end of the device main body 1 corresponding to this lock pin.
A manual hook 10 biased in one direction by a is arranged (for example, Utility Model Application No. 60-89651, Utility Model Application Publication No. 60-8965)
-Refer to Publication No. 89652).

-Problems to be Solved by the Invention- However, in such a magnetic sheet drive device, the locking device that locks the lid 3 to the device main body 1 cannot be attached to the device main body when it is detached from the inserted magnetic sheet main body 5. 1 and the lid body 3, space is required in the device body and the lid body 3 to incorporate the lock pin 9, spring 10a, and manual hook 10 that constitute the lock device. The external dimensions of the magnetic sheet drive device are necessarily larger than the external dimensions of the protective jacket 6 of the magnetic sheet main body 5 due to the built-in structure of the device.
Therefore, there is a natural limit to the miniaturization of still video cameras, which require the entire device to be as small as possible.

SUMMARY OF THE INVENTION In view of the problems of conventional magnetic sheet drive devices, an object of the present invention is to provide a magnetic sheet drive device that can be miniaturized to a size equivalent to the size of a protective jacket.

- Means for Solving the Problems - In order to solve the above-mentioned problems, the present invention provides a lock for holding the lid in a closed state between the device body and the lid that covers the magnetic sheet inserted therein. In a magnetic sheet drive device, a positioning pin is provided on one of the device main body or the lid for determining the position of the magnetic sheet with respect to the device main body, and the magnetic sheet drive device is provided with a positioning pin that determines the position of the magnetic sheet with respect to the device main body. The present invention proposes that a groove that becomes a part of the locking device is formed in a part of the positioning pin, and a locking device that engages with the groove is provided on the other side of the device body or the lid.

-Embodiments- Hereinafter, details of embodiments of the present invention will be explained with reference to FIGS. 1 to 4.

FIG. 1 shows a magnetic sheet drive device according to a first embodiment of the present invention, and FIG. 1 shows a state in which a protective jacket 26 surrounding a magnetic sheet main body 25 is slightly pulled out from a sheet holder 24, which will be described later. .

In FIG. 1, a pocket P is formed on the surface of the main body of the device, indicated by the reference numeral 21, in which a magnetic sheet S consisting of a magnetic sheet main body 25 and a protective jacket 26 surrounding the magnetic sheet S can be accommodated. is the drive shaft 2 of the seat drive motor M
8 is placed. A lid body 2 is attached to the main body 21 of the device, which is pivoted by a shaft 22 on the rear side in the figure and is biased open by a spring (not shown).
3 is provided. A sheet holder 24 is disposed inside the lid 23 and is linked to the opening and closing movement of the lid 23 by a mechanism (not shown), and the magnetic sheet S can be inserted and removed from the open end of the sheet holder 24.

Further, a positioning pin 27 that is inserted into the positioning hole H of the protective jacket 26 is arranged in the pocket P of the main body 21, and on the upper and lower walls of the seat holder 24 corresponding to the positioning pin 27,
A through hole h having a larger diameter than the positioning pin H is formed. That is, the positioning pin 27 passes through the bottom wall 29 of the pocket P formed in the device main body 21 and is rotatably supported by the bottom wall 29. In order to manually operate the positioning pin 27, an unlocking device 30 is installed inside the device main body 21.

The unlocking device 30 includes a bracket 30b connected to an arm 27c extending radially from the base of the positioning pin 27 via a pin 30a, and this bracket 30b penetrates the side wall 21A of the device main body 21 to the outside. It is supported by the inner end of the protruding unlocking rod 30c. The unlocking rod 30c is biased in one direction by a compression spring 31 interposed between the bracket 30b and the side wall 21A, and a stopper 30e is provided at the outer end of the unlocking rod 30c. An unlocking knob 30d that can be locked is fixed.

On the other hand, a seat holder 24 is provided on the surface of the lid body 23.
A hole 23b is formed which coincides with the aforementioned through hole h, and the head of a positioning pin 27 constituting a part of the locking device projects into this hole 23b as shown in the second figure. In the illustrated example, the remaining parts of the locking device are arranged on the outer surface of the lid body 23 facing the hole 23b. That is, the locking device includes a locking member 32 formed with an elongated hole 32a that fits into a pair of support pins 23a aligned in the radial direction of the hole 23b.
This locking member 32 has a lug 3 integrally molded on one side.
2b and a hook pin 23c on the surface of the lid 23, which is biased by a tension spring 33. Also,
The engagement end 32c of the lock member 32 faces the lock groove 27B formed on one side of the head of the positioning pin 27, and the lock can be locked by manually operating the finger hook 32d on the opposite side of the engagement end 32c. Groove 27
The engagement end 32 can be pulled away from B.

The magnetic sheet drive device according to the first embodiment is as follows:
Since the structure is as described above, the positioning pin 27
Since the head of the device is used as part of the locking device,
Since the locking device can be provided substantially in the same plane as the inserted magnetic sheet S, the external dimensions of the device can be made small.

In addition, in order to insert the magnetic sheet S into the magnetic sheet drive device, as shown in the first figure, open the lid 23, insert the magnetic sheet S into the seat holder from the open end of the seat holder 24, and then 23 should be closed. In this case, as the lid body 23 is closed, the positioning pin 27 enters the positioning hole H of the protective jacket 26, which approximately corresponds to the light transmission h of the seat holder 24. The position of the magnetic sheet main body 25 is finely adjusted by complete engagement. Therefore, by this fine adjustment, the drive shaft 28 in the pocket P and the center hub of the magnetic sheet main body 25 are aligned, so that the head of the positioning pin 27 is aligned with the hole 2 by subsequent closing of the lid.
Since it protrudes from 3b, the tension spring 3
3, the locking member 32 is moved so that the engaging end 32c of the locking member 32 engages with the locking groove 27B of the positioning pin 27, and the lid body is locked with respect to the main body of the apparatus. Therefore, in this state, careless removal of the magnetic sheet is prohibited, and information writing or reading operations on the magnetic sheet S are performed.

On the other hand, in order to take out the magnetic sheet S from the magnetic sheet drive device after the operation is completed, the locking member 32 or the unlocking knob 30d may be manually operated. That is, when the finger hook 32d of the locking member 32 is pulled against the bias of the locking member 32, the engaging end 32c of the positioning pin 27, which had been inserted into the locking groove 27B, is disengaged from the locking groove 27B. , lid body 2
3, but along with this opening movement, the seat holder 24 also moves to the position shown in FIG.
Therefore, the magnetic sheet S can be taken out from the open end of the sheet holder 24 exposed to the outside.
Furthermore, when the unlocking knob 30d is pinched with fingers and pulled in the direction of arrow F in FIG. It is rotated clockwise in the figure. Therefore, the lock groove 27B that was engaged with the engagement end 32c of the lock member 32 is rotated to a position where it does not directly oppose the engagement end 32c due to the rotation of the positioning pin 27. As a result, the lid body 23
Since the restraining force of the locking member 32 against the lock member 32 is removed, the pair of lids 23 automatically opens due to the opening habit of the pair of lids 23 in the opening direction. Therefore, as the lid pair is opened, the seat holder 24 is also lifted to the position shown in FIG.
The magnetic sheet S can be taken out.

FIG. 3 shows a magnetic sheet drive device according to a second embodiment of the present invention, and FIG. 3 shows a state in which a protective jacket 26A surrounding a magnetic sheet main body is slightly pulled out from a seat holder 24A, which will be described later.

On the surface of the main body of the device indicated by the reference numeral 21A in FIG.
A pocket P capable of accommodating 6A is formed, and a drive shaft 28 of a seat drive motor M is disposed approximately in the center of the pocket P. For the device main body 21A, the shaft 22A on the rear side in the figure
A lid body 23A is provided which is pivotally supported by. A seat holder 24A is disposed inside the lid 23A, which is linked to the opening and closing movement of the lid 23A by a mechanism (not shown), and a protective jacket 26 that wraps around the seat body is inserted from the open end of the seat holder 24A.
A can be inserted and removed. Further, a positioning pin 27A that is inserted into the positioning hole H of the protective jacket 26A is arranged on the lid body 23A.
A through hole h having a larger diameter than the positioning hole H is formed in the upper wall and lower wall of the sheet holder 24A corresponding to the seat holder 7A. That is, the positioning pin 27A
It penetrates near the open end of A and is rotatably supported by the lid 23A, and is prevented from being pulled out with a washer 27c. A rotary knob 27a is fixed to the outer end of this positioning pin 27A, and can be rotated by this rotary knob 27a.

On the other hand, on the bottom wall of the pocket P of the device main body 21A,
A through hole P1 is formed to receive the tip or lower end of the positioning pin 27A, and the lower end of the positioning pin 27A, which forms part of the locking device, projects into the through hole P1 as shown in the fourth figure. In the illustrated embodiment, the remaining parts of the locking device include the device body 2.
It is incorporated inside 1A. That is, the lock device includes a rod 41 extending in the radial direction of the through hole P1, and the inner end of the rod 41 has a knife edge 42c that can be engaged with the lock groove 27b formed on the surface corresponding to the lower end of the positioning pin 27A. Lock member 42
is fixed. This rod 41 is biased by a compression spring 31A interposed between the lock member 42 and the side wall 21a of the device main body 21A, and
A stopper 43 and an operation knob 44 that can be pinched and pulled with a fingertip are provided at the end projecting to the outside.
is fixed. Since the magnetic sheet drive device according to the second embodiment has the above-described structure, the lower end of the positioning pin 27A is used as a part of the locking device, so that it is substantially flush with the inserted magnetic sheet S. Since a locking device can be provided inside, the external dimensions of the device can be made small.

To insert the magnetic sheet S into the magnetic sheet drive device, open the lid 23A as shown in the third figure, insert the magnetic sheet S into the sheet holder 24A from the open end of the sheet holder 24A, and then body 2
Just close 3A. In this case, as the lid body 23A is closed, the positioning pin 27A enters the positioning hole H of the protective jacket 26A, which approximately corresponds to the through hole h of the seat holder 24A, but the positioning pin 27A and the positioning hole H The position of the magnetic sheet main body S is finely adjusted by the complete engagement of the magnetic sheet main body S. Therefore, by this fine adjustment, the drive shaft 28 in the pocket P and the center hub of the magnetic sheet main body are aligned, and when the lid 23A is subsequently closed, the lower end of the positioning pin 27A protrudes from the through hole P1. , the lock member 42 is moved by the lower end against the compression spring 31A, and the knife edge 42c of the lock member 42 is moved into the lock groove 2 of the positioning pin 27A.
7b, and the lid body 23 is engaged with the device main body 21A.
A is locked. Therefore, in this state, careless removal of the magnetic sheet S is prohibited, and information writing or reading operations on the magnetic sheet S are performed.

On the other hand, in order to take out the magnetic sheet S from the magnetic sheet drive device after the operation is completed, the operation knob 44 of the locking member 42 or the rotation knob 27a of the positioning pin 27A may be manually operated. That is, when the operating knob 44 is pulled in the direction of arrow G in FIG. 3 against the bias of the locking member 42, the locking member 42, which had been inserted into the locking groove 27b of the positioning pin 27A, is removed. It comes off from the lock groove 27b, and the lid body 23
A is opened, but along with this opening movement, the seat holder 24A also moves toward the position shown in FIG.
It falls outside of 7A. Therefore, the magnetic sheet S can be taken out from the open end of the sheet holder 24A exposed to the outside. Also, when the rotary knob 27a is rotated, the positioning pin 27A integrated with this
is rotated. Therefore, the lock groove 27b that was engaged with the knife edge 42c of the lock member 42
is rotated to a position where it does not directly face the knife edge 42c by the rotation of the positioning pin 27A. As a result, the restraining force of the locking member 42 on the lid 23A is eliminated, so that the lid 23A automatically opens due to its own opening behavior in the opening direction. Therefore, since the sheet holder 24A is also lifted to the position shown in FIG. 3 as the lid 23A is opened, the magnetic sheet S can be taken out in the same manner as when the operation knob 44 is operated.

- Effects of the Invention - As is clear from the above description, according to the present invention, the head of the positioning pin for positioning the magnetic sheet provided on the device main body or the lid is used as a part of the locking device, so the magnetic sheet The locking device does not protrude outside, the structure is simple, and the external dimensions of the magnetic sheet drive device can be reduced to the same size as the magnetic sheet. In particular, in the embodiment shown in FIGS. 1 and 2, if the opening angle of the holder 24 when taking out the magnetic sheet is controlled to an angle such that the distance between 24 and 27 is smaller than the thickness of the magnetic sheet, the magnetic When inserting the sheet, I accidentally inserted the magnetic sheet between 24 and 29 and the motor 28
This has the effect of preventing accidents such as damage to magnetic heads, magnetic heads, etc. due to magnetic sheets.

[Brief explanation of drawings]

1 is a perspective view of a magnetic sheet drive device according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1 with the lid closed, and FIG.
FIG. 4 is a perspective view of a magnetic sheet drive device according to a second embodiment of the present invention, FIG. 4 is a sectional view taken along the line - in FIG. 3 with the lid closed, and FIG. 5 is a conventional magnetic sheet drive device. FIG. 3 is a perspective view of the drive device. 21, 21A... Device main body, 23, 23A...
Lid body, 27, 27A...Positioning pin, 27B,
27b...Lock groove, 32, 42...Lock member.

Claims (1)

[Claims] 1. A locking device for holding the lid in a closed state is provided between the device main body and a lid covering a magnetic sheet inserted therein, and a locking device is provided on either the device main body or the lid so that the In a magnetic sheet drive device provided with a positioning pin for determining the position of the magnetic sheet, a groove that becomes a part of a locking device is formed in a part of the positioning pin disposed on one of the device main body or the lid body, and Alternatively, a magnetic sheet drive device characterized in that a locking device that engages with the groove is provided on the other side of the lid.