JP2547756B2 - In-vehicle device - Google Patents

Description

The present invention relates to a vehicle-mounted device, and more particularly to a vehicle-mounted recording or reproducing device.

[Conventional technology]

Recently, it has been proposed to equip a vehicle with a television device and use it for various purposes. For example, for display on a navigation system or for receiving a television broadcast while the vehicle is not in operation. In addition, the price of a device that records and reproduces still images on, for example, a disk medium is rapidly decreasing.
It has become possible to reduce the size and install it in a vehicle to perform recording / reproduction / reproduction signal transmission to a remote location.

[Problems to be Solved by the Invention] When a recording or reproducing device is mounted on a vehicle, damage to the medium and the recording / reproducing head becomes a problem due to vibration during traveling. In a recording / reproducing apparatus in which, for example, a rotating disk is freely exchangeable as a recording medium, the recording / reproducing head is usually in contact with the disk surface before and after the writing and reading of the disk, and Unlike the inside of the vehicle, the inside of the vehicle is substantially the same as the outside air, and an extremely large amount of dust is present, so that vibration and inflow of dust during running of the vehicle may cause fatal damage to the head and the disk surface.

Therefore, it is an object of the present invention to provide a vehicle-mounted recording or reproducing device in which damage to a medium and / or recording or reproducing means is prevented.

[Means for solving problems]

In order to achieve the above object, the present invention has a head for recording or reproducing information on a medium and a relative position between the medium and the head in a first position or a retracting relationship for recording or reproducing. Setting means that can be set to a second position, detection means that detects the running state of the vehicle, and relative position between the medium and the head when the detection means detects that the vehicle is running. And a control means for causing the setting means to set to the second position.

〔Example〕

1 to 6 are drawings for explaining one embodiment of the present invention.

FIG. 1 is a view showing the basic concept of the present invention. In FIG. 1, 1 is a magnetic disk, 2 is a cassette for accommodating the disk 1, and 3 is a synthetic resin center core fixed to the center of the magnetic disk 1. Reference numeral 4 is a shutter, and 5a and 5b are positioning holes for loading the cassette 2 in particular. The details of 4,5 will be described later.

110 is a side brake of the vehicle, 111 is a recording / reproducing device, 112 is a monitor, and 113 is an insertion / reception opening for the cassette 2 provided in 111.

In FIG. 2, 91 is a spindle motor, 94 is a cam body that rotates together with a gear 95 that meshes with a gear 63, and is provided with a cam portion 103 that pushes the tip end portion 100 of a switch 99 that detects a stable plate up state. There is. As shown in FIG. 1, the gear 95 has a switch 105 for detecting a loading completion state.
A dowel 104 for pushing the contact piece 106 is provided. 96 is the axis, 9
Reference numeral 7,98 is a segment of 99 and has contacts 101,102. Note that these members will be described in detail after FIG.

108 is a coding motor drive circuit, 109 is a spindle motor drive circuit, 114 is a CPU for controlling each part of the apparatus, 115 is a reproduction or recording head, 130 is a switch circuit for switching the output of the head 115, 132 is a recording amplifier, and 134 is recording. Amplifier 13
2 is an adder for adding the ID signal output from the CPU 114 via the DPSK modulation circuit 138, 136 is a tuner 152 input via the switch circuit 144, or a video signal from the video camera 154 is modulated A recording processing circuit for performing processing required for recording, 138 is the DPSK modulation circuit, and 140 is a head during reproduction.
Reproduction amplifier that amplifies the output from 115, 142 is a reproduction amplifier
A demodulation circuit that extracts the above-mentioned ID signal from the output of 140 and demodulates it, a reproduction processing circuit 148 that performs processing necessary for reproduction such as demodulation on the output of the reproduction amplifier 140, and 147 outputs the output of the circuit 148 to be described later. A gate that switches whether to output to the adder 150, 149 is a charactor generator that creates a charactor according to a code signal output from the CPU 114, and 150 is an output of the charactor generator 149 to the output of the reproduction processing circuit 148. Is an adder that adds The portion indicated by reference numeral 111 in the drawing is a portion included in the recording / reproducing apparatus, and the other portions are appropriately arranged in the vehicle body, for example, the tuner 152, the monitor 112 are arranged near the driver's seat, and the video camera 154 is arranged in the front of the vehicle. To be done.

Next, the operation of the embodiment configured as described above will be described. When cassette 2 is inserted into insertion slot 113, it automatically
Is loaded at a predetermined position for recording and reproduction inside the device. Next, the loading operation will be described with reference to the drawings.

(Structure of Cassette and Shutter) (FIG. 3) FIG. 3 is a perspective view showing a mechanical structure of the reproducing apparatus of this application, and FIG. 4 is an exploded perspective view of a part thereof. In the figure, 1 is a flexible magnetic disk, which is an example of a disk-shaped record carrier, 2 is a cassette as a record carrier housing container for housing the magnetic disk 1, and 3 is a synthetic resin fixed to the center of the magnetic disk 1. 3a is a PG pin for instructing the rotation phase to pass through the center core 3, and its configuration will be described later with reference to FIG. 2a is a hole provided on the upper surface of the cassette 2 corresponding to the center core 3, and a similar hole 2a 'is also provided on the lower surface thereof. 2b is a window provided on the upper surface of the cassette 2 for entering a stabilizer (74 in FIG. 6) described later. A window for entering the magnetic head 115 is also provided on the lower surface of the cassette 2 at a position corresponding to the window 2b. 2b 'is provided.

Stabilizer entry window 2b and magnetic head 115 entry window 2b '
Is usually covered by a shutter 4 which is a cover member movable in the direction of arrow PQ. The shutter 4 has a hole 4a for closing the shutter into which a shutter closing claw (15c in FIG. 4) described later falls in a side surface thereof and a shutter locking member 2d described below.
An engaging claw 4b that engages with the engaging portion of is provided. 4a ′
Indicates the end face of the hole 4a, and 4c indicates the end face of the shutter 4. 2c
Is a groove provided on the side surface of the cassette 2 to which a shutter closing claw 15c and a shutter opening claw 12a, which will be described later, fit and slide, and 2d is a plastic shutter member provided on the side surface of the cassette 2. When the shutter 4 moves in the direction of the arrow Q relative to the cassette 2, it opens the stabilizer entry window 2b and the entry window 2b 'of the magnetic head 115, and when it moves in the arrow P direction, these It is configured to be closed.

In the apparatus using the cassette 2, 5a and 5b are a pair of positioning holes used especially for positioning the loading, and are formed so as to penetrate from the upper surface to the lower surface of the cassette 2, in particular. One hole 5a is oval, and the other hole 5b is circular at the corner on the same side as the shutter 4 in the direction of the arrow A which is the insertion direction of the cassette 2 and on the upstream side of the shutter 4, Similarly, they are provided in the central portion near the rear end portion of the cassette 2 in the direction of arrow A, respectively. In this embodiment, the hole 5a also serves as an engaged portion for the engaging member 26 described later, but the engaged portion and the positioning hole may be provided separately.

(Shutter opening / closing mechanism) (FIGS. 3 and 4) In FIGS. 3 and 4, the cassette holder portion for holding the cassette 2 is a front holder portion 10 and a second holding portion which are examples of the first holding portion. Rear holder part 20 which is an example of a part
, And the two are separated. Front holder part 10
Is composed of a front half 11 and a front holder 18. A shutter opening member 12 is provided on the upper surface of the front half 11. The shutter release member 12 has a pin 14
The opening claw 12a for opening the shutter 4 is attached to the U-shaped bent portion, and the spring locking portion 12b is provided at one end thereof to lock one end of the spring 16. The leaf spring 13 connects the shutter release member 12 to the front half 11.
It is fixed to the front half 11 by a pin 17 near its tail end so that it can swing up and down.
Reference numeral 12c denotes a bent portion rising from the plane of the shutter opening member 12, and a cam portion 15e of a shutter closing member 15 described later.
Is engaged with. Reference numeral 12d is a guide pin erected in the shutter opening member 12 for stabilizing the movement of the shutter closing member 15 described later.

On the other hand, the shutter closing member 15 is provided on the shutter opening member 12 and has the following structure. That is, 15a is an end face that abuts one end of the bent portion 12c of the shutter opening member, and the cam portion 15e is connected to this, and the bending portion of the opening member 12 when the closing member 15 moves with respect to the opening member 12. By making contact with one end of 12c, the closing member 15 acts to rotate in the direction of arrow F with the guide pin 12d as the center of rotation. The guide pin 12d has a long groove 1 of the closing member 15.
5b is fitted. Reference numeral 15c is a closing claw provided on the U-shaped bent portion of the closing member 15 for closing the shutter 4. Reference numeral 15d is a spring locking portion provided at one end of the closing member 15, and spring 16 is a locking portion 15d and a spring locking portion 12b of the opening member 12.
And the closing member 15 is urged counterclockwise about the guide pin 12d by the action of the spring 16.

The closing claw 15c of the shutter closing member 15 is adapted to fall into the closing hole 4a of the shutter 4 shown in FIG.
Shatter opening claw 12a when the cassette 2 is inserted in the direction
Opens the shutter 4, and at this time, the shutter closing claw 15c falls into the hole 4a, and when the cassette 2 is taken out in the direction of the arrow B, the closing claw 15c falling into the hole 4a closes the shutter 4. The closing claw 15c is provided with a taper portion 15c 'so as to easily get over the end surface 4b of the shutter 4.

(Front Holder Section and Real Holder Section) (FIGS. 3 and 4) Here, the cassette holder section briefly described above will be described in more detail. First, in the front holder portion 10, the front half 11 holds the front holder 18, and the front holder 18 is attached and fixed to the front half 11 by screws or the like (not shown).
17, 17 are pins for fixing and holding the leaf spring 13 to the front half 11 as described above, and 11a and 11a are caulking holes thereof. Reference numeral 11b is a hole formed in the front half 11, through which the vertical portion of the cassette closing member 15 is passed. 11c,
Reference numeral 11c is a screw hole for fixing and holding the guide 30 and the front half 11, and is fixed through a counterbore hole 30a, 30a provided in the guide 30 by a screw (not shown). Screw hole 11c
And 11c are also symmetrically provided on the opposite side of the front half 11, and the guide 31 and the front half 11 are fixedly held by screws through the counterbore holes 31a, 31a of the guide 31 on the opposite side. That is, the front half 11 and the guides 30 and 31 are configured to operate integrally. The front holder 18 is provided with a leaf spring 19 that elastically ejects the cassette 2, and 18a
Reference numerals 18b and 18b are holes provided on one side surface of the front holder 18, and the former functions as an escape hole for the closing claw 15c and the latter functions as an escape hole for the open claw 12a.

Next, in the real holder portion 20, 21 is a rear half which holds the rear holder 22, and the rear holder 22 is attached and held to the rear half 21 by screws or the like not shown.
Reference numerals 21a and 21a are pins that are erected on the front side and the side opposite to the rear half 21 in FIG. 4, and these pins are fitted into the long holes 30b and 31b provided in the guides 30 and 31, respectively, and the rear half 21
Is movable in the AB direction along the long holes 30b and 31b. 2
1b and 21b are bent portions symmetrically provided on both sides of the rear half 21, and are long grooves 30 provided on the guides 30 and 31, respectively.
It fits into c, 31c and prevents the rear half 21 from rotating around the axes of the pins 21a, 21a.
It does not hinder the movement of B.

26 is an engaging member and 28 is an engaging releasing member.
Is engageable with the positioning hole 5a of the cassette 2, and at least a part thereof, for example, the end portion 26a described later, for the reason described later.
All or part of the taper portion 26b and the engagement portion 26c may be formed by plastic. 27 is the fourth engaging member 26
It is a shaft for rotating and holding in the HI direction in the figure, and is fixed to the holding portion 22a of the rear holder 22 by caulking or the like. A spring 25 is shown in the drawing as a means for urging the engaging member 26 toward the positioning hole 5a in the direction I in the drawing. Spring 25 has axis 21
It is held by c, its rear end is hooked on the shaft 21d, and its front end presses the side surface 26d of the engaging member. On the other hand, the engaging member 28 fixed to the fixing portion of the device, for example, the side chassis 33, is the engaging member 26 of the engaging member 26 in a state where the cassette 2 is not inserted into the device.
It abuts against the side surface 26e opposite to 26d and prevents the engagement member 26 from rotating in the direction I in FIG. 2 by the spring 25. If the engaging member 26 itself is made of an elastic member such as a leaf spring and its bent portion engages with the positioning hole 5a, the engaging member 26 is directed toward the positioning hole 5a without using the spring 25 or the like. Can be activated.

29 is a leaf spring for elastically ejecting the cassette 2, 22b is an abutting portion provided on the rear holder 22, and the inserted cassette 2 pushes the abutting portion 22b so that the rear holder 22 has a long hole 30.
It is designed to slide in the A direction along b and 31b. Incidentally, 30d and 31d are holes formed in the guides 30 and 31, respectively, and the shaft 32 is held therein. With the above configuration, the front holder part 10 can move integrally with the guides 30 and 31, whereas the rear holder part 20 can move along the long holes 30b and 31b.
It can be moved in any direction.

S1 is a switch for detecting that the cassette 2 has been inserted, and S2 shown in FIG. 3 is a cassette loading switch. In this example, the switch S1 has the cassette 2 inserted into the device and the abutting portion 22b of the rear holder. The switch S2 is provided at a position to be operated in a state of being in contact with, and the switch S2 is provided at a position to be operated by the shoulder portion of the rear half 21 when the cassette 2 is further pushed and the state shown in FIG. To be

(Cassette loading mechanism) (Figs. 3 and 5) Fig. 5 is a side view seen from the X direction in Fig. 3.
FIG. 3 shows a cassette loading mechanism in an embodiment of the invention of this application, especially a movement of a gear train at the time of loading, and FIGS. (A), (B), (C) and (D).
Shows the states before the insertion of the cassette, after the insertion of the cassette, at the start of the operation of the loading switch S2 (FIG. 3) at the end of the loading, and at the time of loading the stabilizer.

The shaft 32 (Fig. 3) has two guides 30 and 31, respectively, as described above.
The rollers 35 (each shown in FIG. 5 are only two holes on the side chassis 33 side) which are supported by the holes 30d and 31d which are drilled at two positions, and two holes are formed on the side chassis 33 and the sub chassis 34, respectively. Only two pieces on the side chassis 33 side are shown in FIG. 5) so that the guides 30 and 31 are movable along the longitudinal direction of the slot 33a (the upward and downward directions of the cassette 2). . Although the side chassis 33 and the sub chassis 34 are shown integrally in the figure, they can be configured so that they can be divided for practical purposes, which makes it easier to swage the shaft of the gear train, which will be described later, by caulking, etc. In addition, it can be carried out accurately and the whole assembly becomes convenient.

37 is a loading motor, 38 is a worm gear mounted on the shaft of the motor 37, 39 is a worm wheel, 40 is a worm gear that rotates integrally with the wheel 39, 41 is a worm wheel, and the wheel 41 urges a spring 44. The rising portion 41a and an arc-shaped through hole 41b around the shaft 47 are provided. 46 is provided on the back side of the wheel 41 in FIG.
A spur gear that rotates around 47, 46a is a tongue-shaped portion, and pins 46b are planted. The pin 46b has a hole on the front side of the paper.
It penetrates through 41b and urges one end 44a of spring 44. Since the worm wheel 41 and spur gear 46 are separated, the motor
The rotational driving force of 37 is transmitted to the spur gear 46 via the pin 46b. Further, since the worm wheel 41 generates a force in the thrust direction during its rotation, the pressing plate 49 (3rd
(Fig.). 48 is the shaft end 40 of the worm gear 40
It is a bearing that supports a. The other shaft end 40b is pivotally supported by the sub chassis 33.

50 is a spur gear that meshes with the spur gear 46, rotates about a shaft 57, and pins 50a are planted. Pin 50a is roller 51
And the roller 51 is a cam groove 52a provided on the lever 52.
Is fitted. The lever 52 is a lever for pressing the center core 3 and raising and lowering the stabilizer 74 (Fig. 6).
It is for operating 53. 54 is the axis of the lever 52,
55 is a holding plate. 52b is a pin that is set up on the lever 52 and pivotally supports a spring 56. One end 56a of the spring 56 is fixed to the lever 52, and the other end 56b urges the lever 53 to the end 52c of the lever 52. Is configured to. 58 is a spur gear that meshes with the spur gear 50 and rotates about a shaft 59,
A rising portion 58a for urging the spring 60 and an arcuate through hole 58b centered on the shaft 59 are provided. 61 is a spur gear 58 axis 59
A long groove 61a that fits into the pin 21a that is erected on the rear half 21, and a pin 61b that is erected through the hole 58b toward the front side of the paper in FIG. Equipped with
The pin 61b is biased clockwise by the spring 60.

As shown in FIG. 5, the side chassis 33 is provided with a long groove in which a horizontally extending portion 62a and a vertically extending portion 62b are connected. When the spur gear 58 rotates, the rotational driving force is transmitted to the pin 61b by the spring 60, so that the lever 6
1 rotates, and the pin 21a that is planted in the rear half 21 has the long groove 62.
Move in the AB direction along a and along J along the long groove 62b.
Move in the K direction (up and down of cassette 2).

With the above configuration, the rear holder portion 20 has AB and J
It is movable in the K direction, and the front holder part 10 and the guide 3
0 and 31 are movable only in the JK direction. Long groove from flat gear 58
The members up to 62a, 62b are also symmetrically arranged at the rising portion of the sub-chassis 34 on the opposite side, and the shaft 64 of the spur gear 63 that meshes with the spur gear 58 extends toward the sub-chassis 34 side. The driving force of the in-motor 37 is also transmitted to the sub chassis 34 side. In the figure, reference numeral 65 is a pressing plate, 66 is a stepping motor for sending the recording or reproducing head 115, and 33b (two places) are holes formed in the side chassis 33 (which are also provided symmetrically to the sub chassis 34). So, at the end of the assembly process, the front holder part 10 and the guide
It is for inserting a screwdriver to fix 30 and 31 together.

94 to 99 have been explained in FIG.
Is a cam body that rotates together with the gear 95 that meshes with the gear 63, and is the tip of the switch 99 that detects the up-state of the stabilizer.
A cam portion 103 for pushing 100 is provided. Further, the gear 95 is provided with a dowel 104 for pushing the contact piece 106 of the switch 105 for detecting the loading completion state. 96 is a shaft, 97 and 98 are 99 pieces, and they are provided with contacts 101 and 102.

(Stabilizer plate and center core pressing mechanism structure) (Figs. 3 and 5)
6 and FIG. 6) FIG. 6 is a view of the stabilizer and the center core pressing mechanism structure in the embodiment of the invention of this application as seen from the direction A in FIG. 3, and FIG. 6 (A) is a rising position of the cassette 2. (B) of the figure shows the lowered position. In the figure, the stabilizer is shown at 74 and the center core pressing member is also shown at 79.

In FIGS. 3 and 6, 70 is the above-mentioned stabilizer and center core pressing mechanism structure, 71 is a frame body to which the same structure is attached, and 90 is the apparatus main body. In FIG. 4, the disk rotation motor 91 is an outer rotor type, and a fixed shaft is provided at the center thereof (not shown), and its tip serves as a receiving portion of a tip contact portion 77a of a screw 77 described later. There is. Incidentally, in FIG. 6, the positioning pins and the like for the cassette 2 are not shown.

The frame 71 is fixed to the apparatus main body 90, and in this example, all the mechanisms and members relating to the pressing of the center core 3 and the vertical movement of the stabilizer 74 are attached to the frame 71. Reference numeral 72 denotes a lever, which is axially supported by a bending portion 71a of the frame body by a shaft 73, a pin 72a is planted at a front end portion thereof, and a moving lever 53 of a stabilizer 74 is planted at a rear end portion thereof. By being biased by one end 56b of 56, it is configured to be rotatable about a shaft 73.

Reference numeral 74 denotes a stabilizer for stabilizing the rotation of the magnetic disk by maintaining a good contact state between the head and the disk or a contact state with an air layer of about 0.5 μm or less in the recording or reproducing state. Although not shown in FIG. 3, it may be provided on the lower surface of the magnetic disk 1. 74a and 74b are pins on which the stabilizer 74 is erected, and are used for suspending the stabilizer 74 by a lever 76 described later, and a conical coil spring (not shown) is provided between the lever 76 and the stabilizer 74. (Shown) and the stabilizer 74 is always urged in the direction K in FIG. 6 in relation to the lever 76.

Reference numeral 76 is a lever pivotally supported by the bent portion 71b of the frame 71 by a shaft 75, and its approximate shape is that in the vicinity of the shaft 75, a wide portion parallel to the paper surface first extends upward and then bends at a substantially right angle, And on the lower surface thereof, a portion 76a extends from the front side to the back side of the paper, and a part of the back side is bent further downward to form a portion 76b, and a portion 76d extending from the front side to the back side of the paper through a stepped portion 76c and the front side. A downwardly extending portion 76e is formed, and a long groove is formed in the portion 76e.
76f is formed, and the pin 72a is fitted therein. Reference numeral 77 denotes a screw having a thread cut off, and the tip abutting portion 77a thereof abuts the tip of a center fixed shaft (not shown) of the motor 91 as described above, and has a height adjusting function of the stabilizer 74. The device body 90
The receiving portions (not shown in the figure are provided at two places, which are provided when the stabilizing plate 74 descends, are provided at three places of the receiving plate and the tip of the central fixed shaft of the motor 91. K in the figure
It is receiving the urging force of the direction. Reference numeral 78 shows one end of a PG yoke around which a PG coil (not shown) is wound.

Reference numeral 79 denotes a pressing member for the center core 3, which is for securely fitting the center core 3 to the spindle 92 while maintaining the positional accuracy, and is divided into two parts on the front side and the back side of the paper so as not to overlap the screw 77, The lever 81 described later by the shaft 80
The toggle spring 82, which will be described later, is connected to one end 82a of the toggle spring 82. The other end of the toggle spring 82 is connected to a pin 81a that is erected on the lever 81, and the pin 81a is fitted in a long groove 76g provided in the lever 76. The lever 81 is attached to the frame 7 by the shaft 83.
It is axially supported by the bending portion 71c of 1.

In FIG. 6, reference numeral 3a denotes the PG pin, which is fixed to the ring 3b made of a magnetic material and fixed to the center core 3 by means such as caulking. On the other hand, a permanent magnet 93 is planted in the flange portion 92a of the spindle, and the magnet is axially magnetized. The magnetic flux of the permanent magnet 93 passes through the ring 3b and the PG pin 3a to generate a leakage magnetic flux outside the center core 3. With the rotation of the center core 3, the magnetic flux flowing through the PG yoke 78 becomes maximum when the PG pin 3a reaches a position facing the PG yoke 78, and the magnetic flux decreases as the PG pin 3a moves away. As a result, a time-varying voltage is generated in the coil wound around the PG yoke 78, and the rotational phase of the magnetic disk 1 is detected. The spindle 92 and the center core 3 can be mechanically coupled by the magnetic action of the permanent magnet 93 and the ring 3b.

Cassette insert port 113 of the recording / reproducing apparatus 111 shown in FIG.
When the cassette 2 is manually inserted, the cassette 2 is pulled into the inside of the apparatus and loaded into a predetermined position by the operation of a mechanism described later.

At this time, when the side brake 110 is pulled, a reproduction image is displayed on the monitor 112 through the reproduction processing circuit 148 and the gate circuit 147. In this case, the charge generator 14
Characters from 9 are also displayed.

In this state, when the driver releases the side brake to start the vehicle, this signal is sent to the CPU 114. Then CP
The U114 closes the gate circuit 147 so that only the characters from the CPU 114 are displayed on the monitor and sends a command to the loading motor drive circuit 108 to load the loading motor 3
7 is driven in the unloading direction to rotate the gear 95 and the cam 94 which are gear-connected. (P direction) This is the rotation of the gear from the state of FIG. 5 (C) to the state of FIG. 5 (D). When the state of FIG. 5 (D) is reached, the cam portion 103 causes the tip of the switch 99 to move. The contacts 101 and 102 are separated from the portion 100. The CPU detects this and issues an unloading stop command to the loading motor drive circuit 108 to stop the loading motor 37. That is, in FIG. 5 (C), the lever 53 is moved sufficiently upward by the lever 52 so that the stabilizer 74 is in a state of holding down the magnetic disk as shown in FIG. 6 (B). In the figure (D), the lever 53 is slightly lowered. Therefore, the stabilizer 74 is stopped at a position separated from the magnetic disk 1 as shown in FIG. 6 (C). In this state, the magnetic disk 1 which has been pressed against the head 115 by the stabilizer is released, so that the inconvenience caused by the close contact between the head 115 and the disk 1 is eliminated. After that, the CPU 114 sends a command to the spindle motor servo circuit 109 to stop the rotation of the spindle motor 91.

The stabilizer 74 as described above is separated from the magnetic disk,
Further, when the driver stops the spindle motor and pulls the side brake while the spindle motor is stopped, the CPU 114 sends a command to the loading motor drive circuit 108 in response to the signal that detects the side brake to drive the loading motor 37 in the loading direction.

Then, the gear 95 and the cam 94, which are gear-connected to this, are Q
The segment 98, which is rotated in the direction and the tip portion 100 is pushed again by the cam portion 103, contacts the flexible contacts 101 and 102. Even in this state, the loading motor 37 continues to rotate in the loading direction, and the loading motor 37 stops rotating only when the dowel 104 of the gear 95 pushes the section 106 and the loading end switch 105 operates.

This is a transition from (D) to (C) in FIG. 5 and from (C) to (B) in FIG. That is, the stabilizer 74 moves down to the recording / reproducing position again.

In this way, when the state shown in FIGS. 5 (C) and 6 (B) is reached, the CPU 114 sends a command to the spindle motor servo circuit 109 to send a command to the spindle motor circuit 91 to drive the spindle motor 91 and drive the gate circuit 147. Open and display the reproduced image on the monitor 12 again.

Next, the loading operation will be described with reference to FIGS.

When the operator manually inserts the cassette 2 into the cassette holder, the cassette 2 first comes into contact with the contact portion 22b (FIG. 4) of the rear holder 22 and is further pushed in the A direction, so that the rear holder portion 20 is entirely moved in the A direction. Will be pushed to. In this state, the cassette insertion detection switch S1 operates. The lever 61 is rotated clockwise in FIG. 5 through the pin 21a by the movement of the rear holder portion 20, the gear 58 is rotated clockwise through the pin 61b which is erected on this, and the spur gear 50 meshing with the gear 58 is rotated counterclockwise. The gears 46 meshing with the spur gears 50 rotate clockwise. On the other hand, since the worm wheel 41 provided on the front side of the gear 46 does not rotate, the pin 46b provided on the tongue portion 46a of the gear 46 biases the spring 44 along the through hole 41b of the wheel 41. While rotating, it turns clockwise. On the other hand, when the spur gear 50 rotates counterclockwise,
The pin 50a provided on the 50 rotates counterclockwise, and the lever 52 is also urged counterclockwise.However, the lever 52 rotates about the shaft 54 during this period due to the shape of the cam groove 52a of the lever 52. It can be prevented from moving.

FIG. 5 (B) shows a state in which the gear train and the like are rotated by inserting the cassette 2 by hand. In this state, the cassette loading switch S2 of FIG. The loading motor 37 starts to rotate in the loading direction. If the operator releases his hand from the cassette 2 before the state shown in FIG.
The return force of 44 returns the pin 46b and the pin 21a to the position shown in FIG. 9A, and the cassette 2 is discharged to the outside of the apparatus. In the state of FIG. 7B, loading starts, and the rotational driving force of the loading motor 37 is transmitted to the worm gear 38, worm wheel 39, worm gear 40, and worm wheel 41, and the worm wheel 41 rotates clockwise. To do. This causes pin 46b and therefore gear 46
Rotate clockwise, the spur gear 50 rotates counterclockwise, the gear 58 rotates clockwise, and the biasing force of the spring 60 causes the lever 61 to rotate clockwise through the pin 61b. The mating pins 21a (two places) move in the A direction along the long groove 62a of the side chassis 33 and the similar long groove of the sub chassis 34, and the rear holder part 20 moves in the A direction by the driving force of the loading motor 37. become.

Next, operations of the engagement member 26, the engagement release member 28, and the like will be described. When the cassette 2 is not inserted (FIGS. 3 and 5 (A)), the rear holder portion 20 is biased in the B direction in FIG. 5 (A) by the biasing force of the spring 44. The urging force of the pin trains through the engagement of the gear trains 46,50,58.
This is because 21a is biased toward the left end of the long groove 62a.
In this state, the engagement member 26 abuts on the engagement release member 28, and is stopped by the release member 28 at the position rotated in the H direction in FIG. 4 about the rotary shaft 27, and this position causes the cassette 2 to move. In FIG. 6 (A), it is a position that does not hinder the insertion from the front side to the back side of the paper. The end portion 26a of the engaging member 26 can be positioned with a gap between it and the end portion 26a of the engaging member 26 so that the end portion 26a of the engaging member 26 does not enter the stabilizer plate 74 and contact with the stabilizer plate 74 when the height of the entire device has a margin.

On the other hand, a device for front loading the cassette 2,
Particularly, in the still video cassette recording / reproducing apparatus as in this embodiment, the stabilizer and the center core pressing mechanism assembly 70 are the highest in terms of the mechanism. Contribute to.
For the above reason, in this embodiment, the tip end taper portion 26b of the engaging member 26 is arranged so as to slightly overlap in the thickness direction of the cassette 2. When the cassette 2 is inserted in this state, the taper portion 26b is pushed by the end surface of the cassette 2 and the engaging member 2
6 is further H against the bias of the leaf spring 25 against the side surface.
It rotates in the direction, its end 26a contacts the stabilizer 74, and it is pushed up slightly in the J direction in FIG. This movement is a lever
It is absorbed by the play in the mechanism 70 such as the play between the pin 72a at the tip of 72 and the long groove 76f of the lever 76.

At least a part of the engaging member 26 may be made of plastic because if it is made of metal or the like, the lower surface of the stabilizer 74 and the vicinity of the positioning hole 5a of the cassette 2 will be damaged and the normal condition will be maintained. This is because recording or reproduction may be hindered, but such an inconvenience does not occur if the configuration is made of plastic.

As described above, the cassette 2 is inserted and the rear holder 22
When the abutting portion 22b of is pressed, the entire rear holder portion 20 moves in the A direction, whereby the engaging member 26 separates from the disengaging member 28, and is rotated in the I direction of FIG. Then, the engaging portion 26c engages with the positioning hole 5a of the cassette 2. Here, by setting the shapes of the taper portion 26b and the engaging portion 26c and the position of the leaf spring 29, even if the biasing force of the leaf spring 25 is small, when the rear holder portion 20 moves in the A direction, this is The force for pulling the cassette 2 in the A direction through the engagement of can be increased sufficiently, and the loading of the cassette 2 can be reliably performed. On the other hand, when the cassette 2 is pulled out, when the rear holder portion 20 supporting the cassette 2 returns to the position of the engagement releasing member 28, the engagement releasing member 28
Again contacts the engaging member 26 and rotates it against the bias of the leaf spring 25 in the direction H of FIG.
26c moves away from the positioning hole 5a, and the cassette 2 is further moved to the fourth position.
It can be pulled out in the direction of Figure B. Therefore, according to the above device, the cassette 2 can be securely engaged with the cassette holder portion by the leaf spring 25 and the engagement releasing member 28 for urging the engaging member 26, and the engagement can be released. Therefore, unlike the conventional device, reliable loading can be performed without increasing the pressing force of the spring for pressing and holding the cassette in the cassette holder portion, and the cassette 2 is not damaged.

When the loading operation by the motor 37 is started, the pin 21a advances in the A direction along the long groove 62a and then advances in the K direction along the long groove 62b. Pin 21a is a guide 30,
The bent portion 21b penetrating the elongated holes 30b, 31b of 31 and provided on the rear half 21 is also fitted in the elongated grooves 30c, 31c,
Even if the pin 21a moves in the direction A, the guides 30 and 31 do not move. On the other hand, when the pin 21a moves in the K direction, there is no rattling in the AB direction due to the rollers 35 fitted in the long holes 33a provided in the side shears 33 and the similar long holes provided in the sub shears 34. It smoothly moves in the K direction, and this movement also moves the front holder portion 10 in a fixed relationship with the guides 30, 31 in the K direction. That is, the front holder part 10 is movable only in the JK direction which is the second direction, whereas the rear holder part 20 is movable in both the AB direction which is the first direction and the JK direction which is the second direction. Therefore, even though the cassette holder is separated, the cassette can be loaded and unloaded safely and reliably.

Here, the front holder portion 10 is set to the first direction AB
The reason why it is configured so as not to move in the direction will be described, but before that, the opening / closing mechanism of the shutter 4 will be briefly described. In the state before the cassette 2 is inserted into the cassette holder portion, the locking claw 4b of the shutter 4 is engaged with the recess (not shown) provided in the shutter locking member 2d, and the shutter 4
Is prevented from opening. When the cassette 2 is manually inserted into the cassette holder in the direction A, the cassette closing member 15
The closing claw 15c and the opening claw 12a of the cassette releasing member 12 are fitted into the side surface 2c of the cassette 2 and slide, and the closing claw 15c
c engages with the shutter locking member 2d at its tapered portion 15c '. As a result, the closing member 15 rotates in the direction of the arrow F (FIG. 4) around the pin 12d against the spring 16 to close the closing claw 1.
5c rides on the side of the shatter. At this time, open claw 12
c is located in front of the shutter lock member 2d. When the cassette 2 is further pushed in, the closing claw 15c falls into the hole 4a for closing the shutter, the opening claw 12a presses the locking member 2d, and the engagement between the recess and the locking claw 4b is released. Moreover, the end surface of the opening claw 12a comes into contact with the end surface 4c of the shutter, and the cassette 2
Is inserted further in the direction A, the shutter 4 remains. Therefore, as the insertion of the cassette 2 progresses, the stabilizer entry window 2b and the magnetic head entry window 2b 'are exposed.

Next, when taking out the cassette 2 in the B direction, the closing claw 15
Since c has fallen into the hole 4a for closing the shutter and is in contact with the end surface 4a 'thereof, the shutter 4 closes the window as the cassette 2 moves against the movement of the cassette 2 in the B direction. When the shutter 4 is completely closed, its locking claw 4b engages with the recess of the shutter locking member 2d, and the shutter 4 is locked. When the cassette 2 is further pulled out in this state in the direction of the arrow B, the closing member 15 resists the bias of the spring 16 because the closing claw 15c is in contact with the end surface 4a 'of the shutter closing hole 4a. Since the cam portion 15e slides in the long groove 15b with respect to the opening member 12 and the cam portion 15e abuts on the bending portion 12c of the opening member, the cam portion 15e rotates about the guide pin 12d in the direction of arrow F in FIG. The closing claw 15c separates from the hole 4a and returns to the state before the insertion of the cassette 2.

Returning to the previous description, the relative movement relationship between the cassette 2 and the front holder portion 10 will be described. The closing member 15 and the opening member 12 for opening and closing the shutter 4 are attached to the front half 11 as described above. Therefore, if the front holder part 10 is configured to move in the direction A together with the insertion of the cassette 2, the shutter opening claw
12a also moves at the same speed as the cassette 2, so that the shutter 4 cannot be opened. Similarly, when the shutter release claw 15c moves at the same speed as the cassette 2 in the B direction during unloading, the shutter 4 can be closed. Can not. If the front holder 10 is configured to move at a speed different from that of the cassette 2, the shutter 4 can be opened and closed, but since the mechanism is complicated, the front holder 10 will not move in the AB direction after all. It is the simplest to do and is cheap to manufacture. Furthermore, the shutter opening / closing mechanism such as the shutter opening member 12 and the shutter closing member 15 can be fixed to the front holder portion 10 as shown in FIGS. 3 and 4, so that the shutter opening / closing mechanism can be simplified. it can.

After returning to the loading operation by the rotation of the motor 37 and the pin 21a moves in the A direction along the long groove 62a, the gear train in FIG. 5 continues to rotate and the pin 21a descends in the K direction along the long groove 62a. , Stop at its bottom edge. On the other hand, the gear train continues to rotate, and a switch (not shown) for stopping the motor operates in a state where the spring 60 is fully bent, and the motor 37 stops.
FIG. 5 (C) shows this state, where the pin
21a is urged in the K direction by the urging force of the spring 60, so that the elastic springs 19 and 29 urge the cassette 2 toward the apparatus main body 90.

Next, the operation of the center core pressing and the stabilizer ascending / descending mechanism structure 70 during loading will be described. In the state of FIG. 5 (B), the loading motor 37 operates as described above, and the spur gear 50 is driven by the meshing of the gear train to rotate counterclockwise. This allows pin 50a,
The roller 51 also rotates, and the cam groove 52a of the lever 52 is formed so that the lever 52 rotates clockwise around the shaft 54 after the state shown in the figure, so the lever 52 rotates clockwise. Beginning (Fig. 5 (C)), the lever 53 for moving the stabilizer is
Until then, the other end 56b of the spring 56 urged the lever 52 toward the lever 52, while it rotates counterclockwise about the shaft 73 in FIG. Pin
72a also rotates counterclockwise.

The lever 76 is initially held in the state shown in FIG. 6 (A), but since the long groove 76f and the pin 72a are engaged with each other, the movement of the pin 72a in the K direction causes the lever 76 to rotate about the shaft 75. It rotates in the direction of the arrow and also descends in the direction of K. By this movement, the center core pressing member 79 presses and inserts the center core 3 into the spindle 92 by the bifurcated tip portion. The toggle spring 82 has two stable positions, a first stable position shown in FIG. 6 (A) and a second stable position shown in FIG. 6 (B), and the center core pressing member 79 is being pressed. If the reaction force from the center core 3 is below a certain limit, toggle spring
82 is in the first stable position, and the pressing member 79 maintains the position shown in FIG. 7A with respect to the lever 81. However, when the above reaction force exceeds the above limit, the toggle spring 82 moves to the sixth position. As shown in FIG. (B), the pressure member 79 is moved to the second stable position, and the pressing member 79 rotates with respect to the lever 81, whereby the pressing member 79 escapes in a direction different from the pressing direction (for example, the opposite direction). Acts like. FIG. 6B shows a loading completed state, and the pressing member 79 is separated from the magnetic disk 1 at the time of recording or reproducing by the above operation, and the disk rotation motor 90
To the center core 3
It is possible to surely press and insert the spindle 92 into the spindle 92. Further, at the time of unloading, the pressing member 79 in the escaped position rotates in the counterclockwise direction together with the lever 76, but comes into contact with the frame body 71 on the way, and the toggle spring 82 returns to the first stable position, so that the pressing member is pressed. 79 rotates in the clockwise direction about the shaft 80 with respect to the lever 81 and returns to the position shown in FIG. 6 (A).

In the state of FIG. 6 (B), the loading end switch 105 operates and the loading motor 37 stops,
Disk rotation motor 90 and stepping motor 66 (3rd
Starts rotating, the magnetic disk 1 rotates, and the magnetic head 115 accesses a predetermined track by the driving force of the stepping motor 66 to perform recording or reproduction. At this time, the stabilizing plate 74 also comes into contact with the rotating magnetic disk 1 or descends to a position in contact with the rotating magnetic disk 1 with an air layer having a predetermined thickness therebetween, so that the required contact or contact state between them is maintained.

The stabilizing plate and the center core pressing mechanism supporting means in the above-mentioned embodiment is such that the center core pressing mechanism including the pressing member 79 and the stabilizing plate 74 are attached to a common lever 76,
Since the center core is pressed and released by the rotation of 76 and the stabilizer is moved up and down, unit assembly of these parts is possible, and the assembly of the entire device can be simplified and rationalized. it can. Also, since these parts are attached to the device body 90 via the frame 71, it becomes possible to assemble the head touch adjustment on the device body side to the loading device side as it is, and also to mount the device body and loading. It is possible to eliminate or reduce the displacement of the center core pressing position and the variation of the pressing force due to the positional displacement at the time of coupling with the device. However, the loading means by the separated record carrier storage container holding portion can be applied to an apparatus having a stabilizer and a center core pressing mechanism supporting means different from those described above.

Finally, the unloading operation of the above device will be described. By a predetermined operation such as pressing an eject key (not shown), the loading motor 37 rotates in the opposite direction to that during loading, and the lever 76 rotates counterclockwise about the shaft 75. The pressing member 79 returns to the position shown in FIG. 6 (A) with respect to the lever 81 by the action of the toggle spring 82. On the other hand, the rear holder part 20 and the front holder part 10 rise in the J direction in FIGS. 3 and 5, and subsequently the rear holder part 20 moves in the B direction so that the cassette 2 can be taken out of the apparatus. In this case, the rear holder part 20
Returns to the position of the engagement release member 28 in FIGS. 3 and 4,
By the action of the member, the engagement between the engagement member 26 and the positioning hole 5a is released. When the cassette 2 reaches a predetermined position, a switch (not shown) is activated to stop the loading motor 37 and the unloading operation is completed.

As described above, according to the present embodiment, when the side brake of the vehicle is released, the stabilizer is separated from the magnetic disk and the spindle motor is stopped to prevent wear of the seat and the head, damage and the seat. Deformation can be prevented. In addition, it is possible to reduce unnecessary power consumption.

Furthermore, when the car is stopped and the side brakes are pulled, the screen is displayed without loading a new cassette.

Further, according to the present embodiment, when the side brake of the vehicle is returned, the CPU 114 can drive the charactor generator 149 to display the charactor on the monitor 112 instead of the reproduced image from the magnetic sheet. Therefore, it is possible to know the necessary information while the vehicle is running.

 FIG. 7 shows another embodiment.

In the figure, a speed sensor 116 is used instead of the side brakes to detect the running state of the vehicle, control ON / OFF of image display, and control of the position of the stabilizer 74.

In each of the above embodiments, the position of the stabilizer 74 is raised or lowered according to the running state of the vehicle, but the present invention is not limited to this, and the position of the magnetic disk 1 may be changed, for example.
The magnetic disk 1 and the head 115 may be separated from each other by raising or lowering the head 115, or the magnetic disk 1 and the head 115 may be separated from each other by raising or lowering the head 115.

According to the above-described embodiment, since the screen reproduced from the magnetic sheet is not displayed while the vehicle is running, the driver can be safely driven without being distracted.

〔The invention's effect〕

According to the configuration of the present invention, when it is detected that the vehicle is traveling, the relative position between the medium and the head is set to the second position in the retracted relationship, so the impact during traveling of the vehicle It is possible to prevent the medium and the head from being damaged by the above.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIGS. 3 to 6 are explanatory views of a loading mechanism, and FIG. 7 is another embodiment of the present invention. It is a conceptual diagram. 1 is a magnetic disk, 2 is a box body containing 1, 99 is a leaf switch, 94 is a cam body, 95 is a gear, 97, 98 is a section, 100 is
98 tip, 101 and 102 contacts, 37 loading motor, 74 stabilizer, 91 spindle motor, 115 magnetic head

Claims (3)

(57) [Claims] 1. A head for recording or reproducing information on a medium, and a relative position between the medium and the head are set to a first position for recording or reproduction or a second position in a retracted relationship. Possible setting means, detection means for detecting a traveling state of the vehicle, and when the detection means detects that the vehicle is traveling, the relative position between the medium and the head is set by the setting means. An in-vehicle device comprising: a control unit for setting the second position. 2. The vehicle-mounted device according to claim 1, wherein the detecting means detects a side brake position of the vehicle. 3. The vehicle-mounted device according to claim 1, wherein the detecting means detects a traveling speed of the vehicle.