JPH048502Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a magnetic recording/reproducing device, and in particular, when a magnetic tape in a tape cassette is attached to the outer periphery of a rotating drum, the magnetic The present invention relates to a magnetic recording/reproducing device configured to erect a guide pole for guiding a tape to a tape cassette.

Conventional technology Conventionally, for example, in a VTR, etc., a magnetic recording/reproducing device that records/reproduces by running a magnetic tape attached to a rotating drum attempts to downsize the device by reducing the outer diameter of the rotating drum. something is known. In such devices, as the rotating drum becomes smaller, the range of angles at which the magnetic tape attaches to the rotating drum increases, and the magnetic tape runs at an angle so that it is twisted upward in the tape running direction by the poles of the tape loading member. Was. For this reason, in the conventional apparatus, a guide pole is attached to the rotating drum and is provided near the guide groove of the tape loading member for guiding the magnetic tape that has passed through the pole of the tape loading member to the tape cassette.

That is, in conventional magnetic recording/reproducing devices, in order to reduce the size of the device and run the magnetic tape smoothly, for example, two annular rotating bodies are stacked on the bottom of a rotating drum, and the pair of rotating bodies are stacked on top of each other. The tape loading member is moved by rotating the rotating bodies in different directions, and a guide pole is disposed near a guide groove that guides the movement of the tape loading member, and is engaged with a cam groove provided on the rotating body. The guide pole was configured to be rotated to an upright or fallen position via a connecting mechanism connected to a matching lever.

Problems to be Solved by the Invention However, in the magnetic recording/reproducing device having the above structure, the tape loading member is moved along the guide groove by the rotational displacement of the rotating body, and the movement of the tape loading member is obstructed. It is necessary to erect the guide pole that had fallen down.

For this reason, in conventional devices, when the tape loading member moves toward the rotating drum, the timing is set by adjusting the coupling mechanism so that the guide pole stands up after the tape loading member passes in front of the guide pole. Was. Therefore,
Conventional devices require a mechanism to adjust the rise timing of the guide pole to correspond to the movement of the tape loading member, so the configuration is complex and the adjustment work is time-consuming and troublesome. Ta.

Therefore, an object of the present invention is to provide a magnetic recording/reproducing device that eliminates the above-mentioned drawbacks.

Means and Effects for Solving the Problems The present invention consists of an annular rotating body that rotates below the rotating drum by receiving driving force from a drive source, and a magnetic tape cassette that rotates in response to the rotation of the rotating body. a tape loading member that pulls out the tape and attaches it to the outer periphery of the rotating drum, and when the tape loading member moves to attach the magnetic tape,
A magnetic recording/reproducing device in which a chassis rotatably supports a guide pole that stands up after the tape loading member has passed, includes a protrusion protruding from the rotary member, a cam-shaped abutting portion, and a guide pole that stands up after the tape loading member has passed. An abutment member integrally formed with an arm that is elastically displaced in connection with the abutment part, and in which the abutment part is displaced by the elastic displacement of the arm when the protrusion of the rotary body comes into contact with the abutment part; , a displacement member that is connected to one end of the guide pole on the chassis side and displaces the guide pole so as to stand up or fall down in conjunction with the displacement of the corresponding contact member, thereby simplifying the structure and the guide pole. This eliminates the need for a mechanism to adjust the timing of standing up, and saves the effort of adjusting the timing.

Embodiment FIG. 1 shows an embodiment of the magnetic recording/reproducing apparatus according to the present invention. In FIG. 1, a rotating drum 2 is disposed on a chassis 1.

The rotating drum 2 has a structure in which four video heads (rotating heads) are arranged at 90 degree intervals.
The diameter of the drum is 2/3 that of conventional drums, and the magnetic tape is wound over 270 degrees.

A tape cassette 3 has a supply reel 5 and a take-up reel 6 on which a magnetic tape 4 is wound. 7 and 8 are tape loading members, respectively. The tape loading member 7 is arranged on the supply side of the magnetic tape 4, while the tape loading member 8 is arranged on the winding side of the magnetic tape 4. During unloading, each tape loading member 7,
8 is waiting at a position indicated by a dashed line, and moves along arc-shaped guide grooves 9 and 10 to a tape attachment completion position indicated by a solid line, as will be described later.

Reference numeral 11 denotes an abutting member (shown by the broken line in FIG. 1 and in FIG. 8), which has an arm portion 1 whose tip abuts against the wall portion 1a.
1a, an arc-shaped contact portion 11b that changes when it comes into contact with an annular protruding pin, which will be described later, and a rib 11c provided on the side of the contact portion 11b. It is supported by shaft 1b.

The abutting member 11 is integrally molded from synthetic resin, and the arm portion 11a is elastically displaced in response to rotational displacement of the abutting portion 11b, as will be described later. Furthermore, since the arcuate contact portion 11b is displaced in accordance with the protruding pin 47 (shown in FIG. 2A) that slides against the side surface _11b1 , the side surface _11b1 acts like a cam. Therefore, the amount of displacement of the contact portion 11b is determined by the shape of the side surface _11b1 of the contact portion 11b.
A guide pole 12 is provided near the guide groove 10 and is supported by a mounting member 13 fixed to the upper surface of the chassis 1.

As shown in FIG. 2A and FIG. 8, the guide pole 12 has a tape guide portion 12a that guides the tape 4.
, a tip portion 12b that comes into contact with the V-shaped contact portion 1d1 of the stopper 1d held at a predetermined height position from the chassis ₁ , and a gear portion 12c provided on the base side.
and a shaft 12d supported by the mounting member 13. Reference numeral 14 denotes a transmission gear, which meshes with the gear portion 12c of the guide pole 12, and is rotatably supported by a shaft _13a1 of a support portion 13a protruding from the mounting base 13 to the lower side of the chassis 1.

Reference numeral 15 denotes a connecting member, which includes an engaging portion 15b that engages with one end of the transmission gear 14 via a shaft 15a, as shown in FIGS. 5 and 8, and an abutting portion 11b of the abutting member 11.
It consists of an elongated hole 15c into which an engagement pin 11d provided at the tip is inserted, and a latching portion 15d into which a coil spring 16 whose one end is latched to the abutting member 11 is latched.

As shown in FIG. 2A, the guide pole 12 lies down when the tape loading members 7 and 8 are in the standby position, and as the tape loading members 7 and 8 move to the tape splicing completion position. Then stand up as shown in Figure 2B.

Further, on the upper surface of a head arm 17 rotatably supported on the chassis 1, an audio erasing head 18 and an audio control signal recording/reproducing head 19 are mounted and fixed. In addition, the head arm 17 is rotated to the position shown by the dashed-dotted line in FIG. 1 during unloading, and as the tape loading members 7 and 8 move to the tape attachment completion position, it moves to the position shown by the solid line The heads 18 and 19 are brought into contact with the magnetic tape 4 by rotational displacement.

Further, a full-width erasing head 21 is mounted and fixed on the upper surface of a head arm 20 supported on the upper surface of the chassis 1. 22 is an impedance roller,
The impedance roller arm 23 is provided on the upper surface of the impedance roller arm 23 which engages with the head arm 20 and rotates.

Here, with reference to FIGS. 3 and 4, a drive mechanism for driving the tape loading members 7 and 8 and related mechanisms will be described. FIG. 3 shows the unloading state. The tape loading member 7 on the left side holds a supply side loading pole 24 by a vertical shaft on its upper surface, and further has an inclined pole 25 near this.

As shown in FIG. 4, the tape loading member 8 on the right side holds a winding side loading pole 26 by an upright shaft and has an inclined pole 27 in the vicinity thereof.

In addition, the tape loading member 8 in FIG. 4 has two guide projections 8a fitted into the guide groove 10,
8b protrudes from the bottom surface. Further, the tape loading member 8 is pressed against the guardrail surface of the guide groove 10 by a plate spring 28 screwed to one guide protrusion 8a. Note that this configuration also applies to the tape loading member 7 on the right side.

At the end portions of the guide grooves 9, 10, stoppers 29, 30 (FIG. 3) are provided for positioning the tape loading members 7, 8 at the completion of tape attachment.

Further, as shown in FIGS. 4 and 8, below the rotating drum 2, there is a lower annular ring gear (rotating body) 32 for moving the tape loading member 7 on the left side, and a tape loading member 8 on the right side. The upper annular ring gear 31 that moves the upper ring gear 31 and the upper ring gear 31 are stacked concentrically. The pair of ring gears 31 and 32 are supported by guide rollers 33 provided on the lower surface of the chassis 1 in contact with three locations on the inner circumference (FIG. 3). In addition, ring gears 31, 3
2 has the same inner diameter and outer diameter, and has a gear on the outer periphery. The large diameter 34a of the reduction gear 34 meshes with the upper ring gear 31, and the reversing gear 35 meshes with the small diameter gear 34b of the reduction gear 34 and the lower ring gear 32.

A guide piece 36, which is a synthetic resin molded product, is attached to the lower ring gear 32 so that its U-shaped cross section is slidable across the plate thickness of the ring gear 32. A coil spring 37 is stretched between the ring gear 32 and the guide piece 36. This results in
The ring gear 32 is capable of moving the tape loading member 7 via a coil spring 37 and a guide piece 36.

An arc-shaped hole 31b is formed in the upper ring gear 31, and an arc-shaped guide plate 3 is inserted here.
8 is movably supported by a caulking pin 39. A pin 40 is installed at the tip of the guide plate 38, and the upper part of the pin 40 passes through the guide groove 10 and is inserted into the circular hole 8c of the tape loading member 8. Also, the guide plate 38
The base of the ring gear 31 is connected to the ring gear 31 by a coil spring 41.

A loading gear 42 has a large diameter gear 42a that meshes with the ring gear 31, and a subtotal gear 42b coaxially provided above the large diameter gear 42a. There is.

43 is a transmission gear, which includes a large diameter gear 43a that meshes with the small diameter gear 42b of the loading gear 42, and a small diameter gear 43b provided above the large diameter gear 43a.
and a cam portion 4 provided above the small diameter gear 43b.
3c, and is supported by the lower shaft 1c of the chassis 1.

The cam gear 44 is a small diameter gear 43b of the transmission gear 43.
It has a partially toothed gear 44a that meshes with the cam portion 43c, a cam portion 44b that engages with the cam portion 43c, and a plurality of cam grooves (not shown). A loading motor 45 rotates in forward and reverse directions and rotationally drives the cam gear 44 via a gear 46. Therefore, the rotational driving force of the loading motor 45 is transmitted to the ring gears 31 and 32 via the gear 46, cam gear 44, transmission gear 43, and loading gear 42, and loading and unloading operations are performed.

FIG. 5 shows a bottom view of the chassis 1 seen from below. In FIG. 5, tape loading members 7 and 8 are each in a standby position before a tape loading operation, and are in an unloading state.

As shown in FIGS. 5 and 8, 47 is a protruding pin (protruding portion) that protrudes below the ring gear 32. As shown in FIGS. Note that the protruding position of the protruding pin 47 corresponds to the position of the abutting portion 11b so as to abut the abutting member 11 as the ring gear 32 rotates. The contact portion 11b of the contact member 11 is connected to the ring gear 3
It crosses diagonally from the outer diameter side of 2 to the inner diameter side,
As the ring gear 32 rotates, it comes into contact with the protruding pin 47 and is displaced.

Also, the protruding pin 4 during unloading
7 is spaced apart from the contact member 11. For this reason,
At the time of unloading, the contact portion 11 of the contact member 11
b is rotated counterclockwise in FIG. 5 and clockwise in FIG. 8 by the pressing force of the arm portion 11a in contact with the inner wall 1a. The pin 11d at the tip of the contact portion 11b is pressed against the connecting member 15 by the pressing force of the arm portion 11a.
is displaced in the direction of arrow A (FIG. 5) within the elongated hole 15c, and presses the connecting member 15 in the direction of arrow A (FIG. 5). Therefore, as shown in FIG. 2A, due to the displacement of the connecting member 15 in the direction of the arrow A, the transmission gear 14
is rotated clockwise about the shaft _13a1 , and the guide pole 12 is rotated counterclockwise. That is,
The guide pole 12 has a transmission gear 14 and a connecting member 15.
Due to the pressing force of the contact member 11 via the
2b is rotated and urged to be pressed against the upper surface of the chassis 1.

In this manner, the guide pole 12 is tilted down so as not to impede the movement of the tape loading member 8 when the tape loading member 8 performs the loading operation along the guide groove 10. Further, even if vibrations or shocks occur when the device is being transported, the guide pole 12 remains in the fallen state in the unloading state.

Next, regarding the operation during loading, Fig. 6,
This will be explained with reference to FIGS. 7 and 8. Note that FIGS. 6 and 7 are a bottom view and a top view showing the loading state. FIG. 8 is a perspective view showing the loading state.

First, at the time of unloading shown in FIG. 3, the tape cassette 3 is loaded into the apparatus and then a play operation is performed. The loading motor 45 is activated by the play operation, and the cam gear 44 is driven clockwise via the gear 46. Also, cam gear 4
The rotational driving force from 4 is decelerated by a transmission gear 43 and a loading gear 42 and transferred to the upper ring gear 3.
1. And loading gear 42
rotates clockwise, the long gear 31 is driven in the direction of arrow C. Further, due to the rotation of the ring gear 31, the lower ring gear 32 rotates in the direction of arrow D via the reduction gear 34 and the reversing gear 35.

Therefore, the tape loading member 7 is pulled via the guide piece 36 by the lower ring gear 32 rotating in the direction of arrow D, and is moved along the guide groove 9 from the standby position shown in FIGS. 3 and 5. 6th
Move to the tape attachment completion position shown in the figure and FIG. 7. Further, the tape loading member 8 is pulled by the upper ring gear 31 rotating in the direction of arrow C via the guide plate 38 and pin 39, and moves from the standby position to the tape attachment completion position.

In this way, the tape loading members 7 and 8 move from the standby position, and the tape cassette 3
The magnetic tape 4 is pulled out and a loading operation is performed.

When performing the above-mentioned loading operation, as the lower ring gear 32 rotates in the direction of arrow D, the protruding pin 47
are displaced in the same direction. Further, as the ring gear 32 rotates, the tape loading member 8 pulled by the ring gear 31 passes near the guide pole 12.

As shown in FIG. 8, tape loading member 8
When it reaches the vicinity of the guy pole 12, the protruding pin 47
passes above the rib 11c of the abutting member 11 and abuts on the abutting portion 11b. Furthermore, when the ring gear 32 rotates in the direction of arrow D, the protruding pin 47 slides on the side surface _11b1 of the contact portion 11b. In addition, the contact part 1
1b diagonally crosses the annular ring gear 32 from the outer diameter side to the inner diameter side. For this reason, the protruding pin 4
7 presses the contact portion 11b in the outer radial direction by rotating in the direction of arrow D. The contact portion 11b is a protruding pin 47
, and its tip is elastically displaced in the direction of arrow B.

Furthermore, when the ring gear 32 rotates in the direction of arrow D, the tape loading member 8 finishes passing near the guide pole 12, and the ring gear 32
The protruding pin 47 slides on the side surface _11b1 of the contact portion 11b and moves to the position shown in FIG.

Further, the contact member 11 has an arm 1 that contacts the inner wall 1a.
By bending 1a, the contact portion 11b is rotationally displaced in the outer radial direction of the ring gear 32. Note that the contact portion 11b is displaced depending on the shape of its side surface _11b1 and the position of the protruding pin 47. The guide pole 12 has a guide groove 10
Since the tape loading member 8 is disposed near the guide pole 12, it is necessary to stand it up after the tape loading member 8 passes in front of the guide pole 12. However, depending on the mounting position of the protruding pin 47, the timing at which the guide pole 12 rises can be arbitrarily set. Therefore, the contact portion 11b
By setting the shape of the side surface _11b1 and the position of the protruding pin 47 in accordance with the movement of the loading member 8, there is no need to adjust the raising timing of the guide pole 12, which saves time and effort.

As the tip of the contact portion 11b is displaced in the direction of arrow B, the spring 16, whose one end is hooked to the connecting member 15, is pulled in the same direction.

Along with the displacement of the contact portion 11b, the connecting member 15 is displaced in the direction of arrow B due to the tensile force of the spring 16. Therefore, the transmission gear 14 connected to the connecting member 15 by the pin 15a rotates counterclockwise. The guide pole 12 rotates clockwise due to the rotation of the transmission gear 14 and stands up. Further, the tip end 12b of the guide pole 12 is connected to the contact portion 1d of the stopper 1d.
The standing angle is determined by making contact with the holder, as shown in FIGS. 2B and 7.

Further, when the ring gear 32 rotates in the direction of arrow D and the protruding pin 47 presses the contact portion 11b to displace it, the rotation of the guide pole 12 is
d, so the spring 16 is tensioned. Therefore, the guide pole 12 moves its tip 12b to the stopper 1d by the tensile force of the spring 16.
It is rotated and energized so as to press it. in this way,
The guide pole 12 is pressed against the stopper 1d without wobbling due to the tensile force of the spring 16, and when the magnetic tape 4 comes into sliding contact with the tape guide portion 12a, the magnetic tape 4 runs stably.

The guide pole 12 is rotated and biased in the direction of falling down during unloading, as shown in FIG. 2A, and rotated and biased in the direction of standing up during loading, as shown in FIG. 2B. It works like a mechanism.

In this way, the ring gears 31 and 32 are arranged so that the tape loading members 7 and 8 are connected to the stoppers 29 and 30, respectively.
The guide pole 12 is moved to the tape attachment completion position where it comes into contact with the guide pole 12, and the guide pole 12 is raised and stopped. Further, the magnetic tape 4 pulled out from the tape cassette 3 is attached to the outer periphery of the rotating drum 2, guided by the guide pole 12, and smoothly wound onto the take-up reel 6. Incidentally, when returning to the unloading state, the motor 45 rotates in the opposite direction, and each member operates in the opposite direction to the above-mentioned loading operation.

Effects of the Invention As described above, according to the magnetic recording/reproducing device according to the present invention, the protrusion provided on the rotating body, the abutting member having the abutting portion that comes into contact with the protrusion and is displaced; Since the guide pole is disposed in conjunction with the displacement of the member, it is provided with a displacement member that raises the guide pole and displaces it so that it falls down. By adjusting the connecting mechanism that connects the guide pole and the guide pole, such troublesome work can be eliminated and the configuration of the connecting mechanism can be simplified. Also,
Since the protrusion comes into contact with the abutting member and raises the guide pole, the timing for raising the guide pole can be set accurately and easily depending on the position of the protrusion.Moreover, since the tape loading member moves in accordance with the rotating body, the guide pole can be raised easily. It has the advantage that the displacement of the contact member can be made to correspond reliably to the movement position of the tape loading member, and there is no inconvenience caused by a shift in the timing of raising the guide pole.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the magnetic recording/reproducing apparatus according to the present invention, FIG.
Figure B is a side view showing the guide pole in an upright position during loading; Figures 3 and 4 are a plan view and side view showing the ring gear and its drive mechanism;
6 and 6 are a bottom view at the time of unloading and a bottom view at the time of completion of loading, respectively, to explain the main parts of the present invention, and FIG. 7 is a plan view of the tape loading member and the ring gear drive mechanism at the time of completion of loading. , FIG. 8 is a perspective view for explaining the loading state. 2...Rotating drum, 3...Tape cassette, 4
... Magnetic tape, 7, 8 ... Tape loading member, 9, 10 ... Guide groove, 11 ... Contact member, 11a ... Arm portion, 11b ... Contact portion, 12 ...
...Guide pole, 12a...Tape guide section, 14
...Transmission gear, 15...Connection member, 16...Coil spring, 31, 32...Ring gear, 45...Loading motor, 47...Protrusion pin.

Claims (1)

[Claims for Utility Model Registration] An annular rotating body that rotates below the rotating drum by receiving driving force from a drive source, and a magnetic tape is pulled out from a tape cassette in accordance with the rotation of the rotating body, and the magnetic tape is rotated. A tape loading member attached to the outer periphery of the drum and a guide pole that stands up after the tape loading member passes when the tape loading member moves to attach the magnetic tape can be rotated by the chassis. In a magnetic recording/reproducing device supported by a rotary member, a protruding portion protruding from the rotary body, a cam-shaped contact portion, and an arm portion that is elastically displaceable in connection with the abutment portion are integrally formed, and the corresponding contact portion is A contact member is connected to one end of a guide pole on the chassis side, and is connected to one end of a guide pole on the chassis side, and is connected to one end of a guide pole on the chassis side, and is connected to one end of a guide pole on the chassis side. A magnetic recording/reproducing device comprising a displacement member that displaces the guide pole in an interlocking manner so as to raise or lower the guide pole.