JPH01294268A - Slider moving mechanism - Google Patents

Abstract

PURPOSE:To prevent the damage of a transmission mechanism like a work gear by providing a slider with a rack plate so that this rack plate is freely moved by a prescribed length and energizing the rack plate and providing the rack plate with a rack so that the rack is freely moved by a prescribed length and energizing the rack in the direction opposite to the rack plate. CONSTITUTION:A rack 90 is attached to the rear end part of a slider 26 with a rack plate 122 between them, and the rack 90 can be moved to the rack plate 122, and the rack plate 122 is movably attached to the slider 26. The rack 90 and the rack plate 122 are energized in opposite directions by respective elastic members. Consequently, biting-in or the like does not occur in the gear transmission mechanism between a rotation driving source and the rack though the slider is forcibly stopped in either direction. Thus, the slider has a buffer function in both directions, and the worm gear or the like is not damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a slider moving mechanism, and more particularly to a slider moving mechanism applied to a magnetic disk back attachment/detaching device used in an electronic camera or the like.

[Conventional technology]

Recently, imaging devices such as solid-state image sensors and image tubes have been combined with recording devices that use magnetic disks, which are inexpensive and have a relatively large storage capacity, to electronically take still photographs of subjects using rotating magnetic disks. An electronic still camera system has been developed that records images and plays them back using a separate television system or printer.

The magnetic disk used in such a system is usually used in the form of a magnetic disk back. A magnetic disk back rotatably stores a magnetic disk for magnetically recording still image information, etc., and this magnetic disk back can be used with a magnetic recording device built into an electronic camera or a playback device integrated with or separate from the magnetic disk. It is installed and used.

When attaching a magnetic disk pack to a magnetic recording device or playback device in an electronic camera, connect the center hole provided in the center core of the magnetic disk in the magnetic disk pack directly to the rotational drive shaft of the magnetic recording or playback device. Attaching the magnetic disk pack is troublesome and inconvenient, and there is a possibility that the magnetic disk pack cannot be accurately attached to the magnetic recording device or the reproducing device.

In order to eliminate such troubles, a magnetic disk pack attachment/detachment device has been proposed.This magnetic disk pack attachment/detachment device connects a packet that is openable and closably supported to the main body of a magnetic recording or reproducing device. A magnetic disk pack is inserted into a packet, and the magnetic disk of the magnetic disk pack in the packet is moved by moving the slider and using the cam of the slider to move the packet. It is attached to the rotational drive shaft of the main body of the device. A center core is provided at the center of the magnetic disk, and the rotation drive shaft is fitted into the center hole of the center core to rotate the magnetic disk within the magnetic disk pack.

[Problem that the invention seeks to solve]

The slider is driven by a rotational force from a rotational drive source using a worm gear and a rack-pinion mechanism. That is,
A rotary drive source, worm gear, and pinion are placed on the device body side, and a rack that engages with the pinion is provided on the slider.
The slider is driven by the rotational force of the rotational drive source. However, if the slider overruns from its normal stopping position due to malfunction of the system controller, malfunction of the load end switch, etc., and the slider is forcibly stopped with a rigid stopper, the worm gear and worm wheel will bite. There are drawbacks. In order to prevent this biting, it is conceivable to provide a clutch mechanism between the worm wheel and the spur gear, but the clutch mechanism is effective for overrunning the slider only in one direction.

Also, a two-way clutch mechanism in which felt or the like is sandwiched between the worm wheel spur gears may be considered, but slipping may occur.
Operation becomes unstable. Further, the provision of a clutch mechanism is not suitable for a gear train using precision gears, and has the drawback of increasing the size of the device.

The present invention was made in view of the above circumstances, and an object of the present invention is to propose a slider moving mechanism that does not damage a transmission mechanism such as a worm gear.

[Means for solving problems]

In order to achieve the above object, the present invention includes an apparatus main body, a rotational drive source provided in the apparatus main body, a slider movably supported on the apparatus main body, a rack provided on the slider, and a rotary drive source provided in the apparatus main body. A slider moving mechanism includes a pinion that is provided and connected to a rotational drive source and meshes with the rack, wherein a rack plate is provided on the slider so as to be movable a predetermined distance in one direction of the slider movement and is biased. The rack is provided on the rack plate so as to be movable a predetermined distance in the slider sequential direction, and is biased in the opposite direction to the rack plate.

[Effect]

In the slider drive mechanism according to the present invention, a rack plate is provided on the slider so as to be movable a predetermined distance in the slider movement direction, and is biased in one direction. Further, a rack is provided on the rack plate so as to be movable a predetermined distance and is biased in the opposite direction to the rack plate. As a result, the slider has a buffering function in both directions and does not damage the worm gear or the like.

〔Example〕

Preferred embodiments of the slider moving mechanism according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 7 shows a plan view of a magnetic disk pack used in a magnetic recording or reproducing device such as an electronic camera.
The figure is a sectional view taken along line A-A in FIG. 7. As shown in FIG. 7, the magnetic disk pack 10 has a substantially rectangular shape, and a magnetic disk 12 on which still image information and the like are recorded is rotatably housed inside the magnetic disk pack 10. magnetic disk 12
A center core 14 as a reinforcing member is provided in the center of the magnetic disk pack 1.
It is exposed to the outside through a circular opening 16. A center hole 15 is formed in this center core 14, and an elastic piece (not shown) is formed in this center hole 15, and a drive shaft 32, which will be described later, is fitted into the center hole 15 of the center core 14 against the biasing force of this elastic piece. It is supposed to be done. A window 18 in which a magnetic head (to be described later) is located opens in the magnetic disk pack 10, and this window i18 is opened by a slideable shutter 20.
It is opened and closed by That is, the shutter 20 closes the window 18 to prevent dust from adhering to the magnetic disk 12 before the magnetic disk back 10 is inserted into a packet to be described later, and is installed in the packet when the magnetic disk back 10 is inserted into a packet to be described later. The shutter 20, which is locked by the claw, moves downward in FIG. 7 to open the window 18, thereby making it possible to record and reproduce information on the magnetic disk 12.

In the magnetic disk back 10, a locking recess 22 is formed at the opposite end of the shutter 20, and this recess 22
is used for temporarily fixing the magnetic disk back 10 when inserting it into a packet to be described later.

FIG. 1 shows an exploded perspective view of a magnetic recording and reproducing apparatus, and the magnetic recording and reproducing apparatus is constructed with a support plate 24 attached to a drive unit, a slider 26, a packet 27, and a regulating plate holder 28 as main components. First, the support plate 24
To explain the internal structure of the support plate 24, a motor 3 for driving a magnetic disk provided in the drive unit is mounted on the support plate 24.
The drive shaft 32 of this motor 30 is fitted into the center hole 15 of the center core 14 of the magnetic disk back 10 shown in FIG. . Although not shown, the support plate 24 is provided with a magnetic head, a head carriage to which the magnetic head is attached, and a feed motor that moves the head carriage via a lead screw. Therefore, when the feed motor is rotated at a predetermined number of revolutions, the head carriage is moved at a predetermined pitch in the axial direction of the lead screen due to the rotation of the lead screen.
As a result, the magnetic head moves in the radial direction of the magnetic disk 12, and still image scratch information can be magnetically recorded or reproduced on the magnetic disk 12 track by track. still,
46, 46, 46 are positioning pins for the magnetic disk back 10.

This support plate 24 is bent into a substantially U-shape as a whole,
It is composed of a bottom portion 24A and a pair of side portions 24B, 24B. Each of these fl! ! lN24B, 24B has abbreviated regulation #66A, 66B, 66C and vertical grooves 67A, 67B,
67C is formed. The regulation grooves 66A, 66B, and 66C are provided with guide pins 54A, 54B, and 5 of the packet 27, which will be described later.
The movement of the 4C magnetic disk pack in the insertion direction and the direction orthogonal to the insertion direction is restricted. The guide pin 54A of the packet 27 fits into the regulation groove 66A and is regulated, the guide pin 54B of the packet 27 fits into the length regulation groove 66B and is regulated, and the guide bin 54C of the packet 27 fits into the regulation groove 66C. Inserted.

The vertical grooves 67A, 67B, and 67G restrict the movement of guide pins 56A, 56B, and 56C of the regulating plate holder 28, which will be described later. The guide bin 56 of the regulating plate holder 28 is located in the vertical groove 67.
A is inserted and regulated, and a guide pin 56 is installed in the vertical groove 67B.
B is inserted and regulated, and the guide bin 56 is installed in the vertical groove 67C.
C is inserted and regulated.

A center core push drive lever 100 is pivotally supported on the support plate 24 via a pin 102 and is urged to rotate counterclockwise by a spring 104 . Further, at the rear end of the support plate 24, a regulation plate holder detection lever 106 is rotatably supported via a pin 108. When the regulating plate holder descends during magnetic recording and reproduction, the detection lever 106 is pushed by the rear end 28A of the regulating plate holder 28 and rotates counterclockwise.

On the support plate 24, a slider 26 is mounted on the magnetic disk back 1.
It is arranged so as to be movable in the insertion direction of 0.

A rack 90 is provided on the slider 26, and the slider 26 is moved by meshing with a pinion 92 on the support plate 24.

This slider 26 has a guide pin 54A of the packet 27.
Groove cam 76.4. , groove cam 76B that guides the guide pin 54B of the packet 27, and the packet 27.
A grooved cam 76C is formed to guide the guide pin 54C.

Furthermore, a cam 78A that guides the guide bin 56A of the regulating plate holder 28, a cam 78B1 that guides the guide pin 56B, and a cam 78C that guides the guide pin 56C are formed. Groove cam 76A176B, 76C1 cam 78A
, 78B, and 78C regulate the vertical movement of the packet 27 and the regulation plate holder 28. As shown in FIG. 2, the grooved cams 768 to 76C (only 76A and 76B are shown) are composed of a tapered portion and a flat portion following the tapered portion. Mata cam 7
8A to 78C (only 78A is shown) are composed of an upper flat part, a tapered part, and a lower flat part.

As shown in FIG. 1, the packet 27 has a side surface bent into a substantially U-shape, and has a storage portion 27 that can store a magnetic disk pack IO.
A, an opening 52 is formed in the center thereof, and the drive shaft 32 on the support plate 24 side, a magnetic head, etc. can be inserted thereinto.

Furthermore, a center core pushing member 29 is provided on the upper surface of the packet 27 so as to be movable up and down in the direction of the rotational drive shaft via the pins 31 and 31.

Also, each side 50.50 is bent on the side of the packet 27, and guide pins 54A, 54B, 5 are formed on the side 50.50.
4C is installed protrudingly. These guide pins 54A, 54B
, 54C are the regulating grooves 6 of the side parts 24B, 24B of the support plate 24.
6A, 66B, 66C and cams 76A, 7 of slider 26
6B and 76C, the packet 27 with the magnetic disk pack 10 mounted thereon is moved parallel to and raised/lowered with respect to the support plate 24 side, and the magnetic disk pack 1
0 center core 14 is guided to a position where it fits with the drive shaft 32.

Similar to the packet 27, the regulation plate holder 28 has guide pins 56A, 56B, and 56C protruding from both sides thereof. 78A to 78C, the regulation plate holder 28 is raised and lowered relative to the support plate 24. A regulating plate 64 is provided on the back surface of the regulating plate holder 28, and this regulating plate 64 is used to control the magnetic disk 12 during magnetic recording and reproduction on the magnetic disk 12 by the magnetic head.
It has the function of aligning the magnetic head side with the magnetic head.

The operation of the slider moving mechanism constructed as described above is as follows. First, when the magnetic disk pack 10 is inserted into the packet 27, the magnetic disk pack 10 is temporarily secured within the packet 27 as described above, and at this time, the shutter 20 of the magnetic disk pack 10 is opened and the window of the magnetic disk pack 10 is opened. Portion 18 is open. At this time packet 27
guide pins 54A, 54B, 54C (54A, 54B
(only shown) are grooved cams 76A, 76B as shown in FIG.
, 76C (only 76A and 76B are shown) are located in the taber section of J66A and 66B.

66C, the packet 27 can only move horizontally. In this state, packet 2
7 is located away from the drive shaft 32. Also, the guide pins 56A, 56B, and 56C of the regulating plate holder 28 are connected to the slider 2.
It is located on the flat part of No. 6 cams 78A, 78B, and 78C (only 78A is shown) and is in a stationary state. When the slider 26 moves from this state to the right side in FIG. 2, that is, in the magnetic disk pack insertion direction, the guide pin 54A of the packet 27,
54B and 54C are the regulating grooves 66A and 66 of the support plate 24.
B, located on the horizontal part of 66C, packet 27 is the second
Move horizontally to the right on the diagram.

After that, as shown in FIG. 3, the guide pins 54A, 54B,
When the guide pins 54C enter the vertical portions of the regulating grooves 66A, 66B, 66C, the horizontal movement is restricted, and the guide pins 54A, 54
B, 54C are guided by the tapered portions of the grooved cams 76A, 176B, 76C and are lowered, and the packet 27 is accordingly lowered toward the drive shaft 32, and at the position shown in FIG. is attached to the drive shaft 32.

On the other hand, the guide pins 54A, 54B, 5 of the packet 27
4C, as shown in FIG.
The regulating plate holder 28 moves on the flat part 8C, and its position does not change. Guide pin 56A of regulating plate holder 28.

When 56El and 513C are located at the tapered portion of the cams 78A to 78C, the regulating plate holder 28 is guided by the tapered portion and moves downward as shown in FIGS. 3 and 4, and is at the position shown in FIG. The regulation plate 64 is located within the window portion 18 of the magnetic disk pack 10, and comes to face the magnetic head. While the guide bin 56 of the regulating plate holder 28 is moving on the tapered portion of the slider 26, the packet 2
The guide bins 54A, 54B, and 54C of No. 7 move along the grooved cams 76A to 76A of the slider 26 as shown in the movement of FIGS.
As it moves away from the tapered portion of 76C, the regulation grooves 6° of the side portion 24B 6A, 66B, 66C (66A).

66B (only 66B shown) is inserted into the vertical portion of the packet 27, so that no change in the position of the packet 27 occurs at this position. In this state, the magnetic head is located in the window portion 18 and can perform magnetic recording or reproduction on the magnetic disk 12 of the magnetic disk pack 10.

To remove the magnetic disk pack 10, the above operation is reversed. That is, when the slider 26 is moved in the opposite direction, that is, to the left from the position shown in FIG. Accordingly, the regulation plate holder 28 is pulled out from the window 18 of the magnetic disk pack 10 and retracted upward. When the upward movement of the regulating plate holder 28 is nearing the end, the guide bins 54Δ, 54B, and 54C of the packet 27 reach the tapered portions of the grooved cams 76A to 76C of the slider 26, and are regulated by the tapered portions to move the guide bins 54A, 54B, and 54B, respectively. 54C is moved in the opposite trajectory to the above, that is, upward and to the left, and accordingly, the packet 27 is also moved upward and horizontally to the left, thereby inserting and removing the magnetic disk pack 10 as shown in FIG. Move back to position.

The slider moving mechanism according to the present invention will be explained with reference to FIGS. 5 and 6. Rear end 12 of slider 26
A rack 90 is attached to the rack 0 via a rack plate 122. To explain the mechanism of this part in more detail, the rack plate 122 has elongated holes 124 and 124 formed in the direction in which the slider 26 is inserted. pin 126
．． 126 is located. As a result, the rack plate 122
is supported with respect to the slider 26 so as to be movable in the slider insertion direction. Further, a spring hook 128 is formed on the rear end portion 120 of the slider 26, and a spring hook 130 is also formed on the rack plate 122, and a spring 132 is provided between the spring hooks 128 and 130. 122 is urged toward the rear end of the slider 26.

On the other hand, in the book 90, the long holes 134 and 134 are connected to the slider 26.
The bins 136 and 136 installed in the rack plate 122 are located in the long holes 134 and 134, so that the rack 90 is supported by the rack plate 122 so as to be movable in the direction of movement of the slider 26. This means that it has been done. A spring hook 138 is formed on the rack 90, and a spring hook 140 is also formed on the rack plate 122, and a spring 142 is provided between the spring hooks 138 and 140, so that the rack 90 is rotated toward the front end of the slider 26. This means that it is biased by the spring 142.

According to the slider moving mechanism configured as described above, when the slider 26 moves upward in FIG. 6 and is forcibly stopped by the stopper, the slider 26 and the rack plate 122 move toward the slider. However, the rack 90 moves against the urging force of the spring 142. This prevents biting between the worm gear and the worm wheel. At this time, if the elastic force of the spring 142 is stretched at about half the movement stroke of the rack 90 and balanced with the starting torque of the motor, the rack 90 will stop at that position, but the rotation speed of the motor is 0 due to the load characteristics, so the bite of 5A does not occur.

Further, when the rotational drive source is reversed and the slider 26 moves downward in FIG. The worm gear moves against the urging force of the worm wheel, and a phenomenon similar to that described above occurs, and no biting occurs between the worm gear and the worm wheel.

In the above embodiment, the rack plate 122 was urged upward in FIG. 6, and the rack 90 was urged downward in FIG. 6, but the same effect can be obtained even if the rack plate 122 is urged in the opposite direction. can get.

〔Effect of the invention〕

As explained above, according to the slider moving mechanism according to the present invention, the rack is attached to the rear end of the slider via the rack plate, the rack is movable with respect to the rack plate, and the rack plate is The rack is movably attached to the slide plate, and the rack and rack plate are biased in opposite directions by respective elastic members. Therefore, even if the slider is forcibly stopped in either direction, the gear transmission mechanism between the rotational drive source and the rack will not be jammed. Also, if the elastic force of the spring is stretched at about half the movement stroke of the rack or rack plate and balanced with the starting torque of the motor, the rack or rack plate will stop at that position, but the motor's Since the rotation speed is 0 due to the load characteristics, gear bite does not occur.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the overall structure of the magnetic recording/reproducing device used in this embodiment, and Fig. 2 is a side view showing the position of the slider before the magnetic disk pack is inserted or before it moves after the pack is inserted. 3 is a side view showing the slider in the middle of movement, FIG. 4 is a side view showing the position of the slider at the magnetic recording and reproducing position, and FIG. 5 is an exploded perspective view showing the main parts of the slider moving mechanism according to the present invention. FIG. 6 is a plan view of the magnetic disk pack after assembly shown in FIG. 5, FIG. 7 is a plan view of the magnetic disk pack used in this embodiment, and FIG. FIG. DESCRIPTION OF SYMBOLS 10... Magnetic disk pack, 12... Magnetic disk, 14... Center core, 24... Support plate, 26... Slider, 27... Packet,
28... Regulating plate holder, 32... Drive shaft,
90...Rack, 122...Rack plate.

Claims (1)

[Scope of Claims] An apparatus main body, a rotational drive source provided on the apparatus main body, a slider movably supported on the apparatus main body, a rack provided on the slider, and a rotational drive source provided on the apparatus main body. and a pinion connected to the rack and engaged with the rack, in which a rack plate is provided on the slider so as to be movable a predetermined distance in one direction of the slider movement and is biased, A slider moving mechanism characterized in that a rack is provided to be movable a predetermined distance in the slider moving direction and is biased in the opposite direction to the rack plate.