JPH03127367A - Tape loading device for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To miniaturize a reproducing device by partially sharing one and the same route between first and second loading guides which guide the running of first and second tape guide posts. CONSTITUTION:First and second loading guides 19 and 20 which guide the running of first and second tape guide posts 9 and 11 from a tape cassette 2 to a prescribed position are constituted to share one and the same route at a part of them. Consequently, the shared part requires only the space for one loading guide 22, and extents of movement of both tape guide posts 9 and 11 are approximately equalized, and they are driven with one driving mechanism. Thus, a magnetic recording and reproducing device is miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape loading device in a magnetic recording/reproducing device such as a cassette video tape recorder.

2. Description of the Related Art Conventional tape loading devices for cassette-type video tape recorders draw out a magnetic tape from a tape cassette and wrap it around the outer periphery of a rotating drum placed near the tape cassette to record or play back video signals. A generally known tape loading device uses one movable loading roller post arranged on the supply reel side and the take-up reel side of a cassette to pull out a magnetic tape and wind it from both sides of a rotating drum. .

For example, as shown in FIG. 10, the loading roller post 201 on the take-up reel side is moved in the direction of arrow 202 to pull out the magnetic chip 1203, and at the same time, the loading post 204 on the supply reel side is moved in the direction of arrow 205. to pull out the magnetic tape 203 and turn it onto the rotating drum 206.
It was wrapped from both sides.

However, like a camera-integrated video recorder,
When the rotating drum is made smaller in order to make the magnetic recording/reproducing device smaller, it is necessary to wrap the magnetic tape deeply around the rotating drum, and as shown in Fig. 11, the loading roller post on the take-up reel side is 201 to rotating drum 2
The magnetic tape 203 is moved in the direction of the arrow 207 to the back f&, but at this time, in order to stably secure the tape bus of the magnetic tape 203, another post 208 is moved in the direction of the arrow 209 to extend the tape path. It is possible that Movement of each post 201 , 204 , 208 is performed by appropriate driving means and a loading guide for forming a travel path for these posts 201 , 204 , 208 .

Problems to be Solved by the Invention In the above conventional configuration, two posts 201° and 208
using separate loading guides, arrow 207,
Moving from the direction 209 requires two movement paths, which requires a corresponding amount of space, making it extremely difficult to achieve miniaturization of the device. Furthermore, separate drive mechanisms for moving the two posts 201 and 208 are required, which also makes it difficult to miniaturize the device.

In order to solve the above problems, the present invention can narrow the space for the movement path of the two posts, and can move the two posts only by one drive R, The object of the present invention is to provide a tape loading device that is very effective in downsizing the device.

Means for Solving the Problems In order to achieve the above object, the present invention provides first and second tape guide posts for respectively pulling out the tape contained in a tape cassette to predetermined locations located outside the tape cassette. and first and second loading kites for respectively guiding the travel of these first and second Chi 1 guide posts from the tape cassette to a predetermined location, and these first and second loading guides. are configured so that some of them share the same route.

Effect: According to this configuration, the first and second loading guides for guiding the travel of the first and second tape guide posts share the same path in a part thereof, so that this sharing In this case, only the space required to provide one loading guide is required, and the moving distance of both tape guide posts can be made almost the same, making it possible to move both tape guide posts with the same drive mechanism. Therefore, this greatly contributes to miniaturization of magnetic recording and reproducing devices.

Embodiment In FIG. 1, 1 is a main body chassis, 2 is a tape cassette attached to the chassis 1, and a supply reel 3 and a take-up reel 4 are disposed within the cassette 2. When the cassette 2 is installed in the chassis 1, the extension boss 8 of the recording/reproducing device, the first loading roller post 9, and the pinch roller 10, the second loading roller last 11, the third loading roller last 12, and the tension post 13 are connected to the magnetic tape 14.
are inserted into the inner recesses of each. 15.16.17 is the first
, second and third loading roller busts 9, 11
．． The first, second and third boats were loaded with 12. 19.20.21 is the first
, first, second and third loading guides respectively guiding the second and third boats 15.16.17, the first and second loading guides 19.20 having a common guide 22 in their intermediate portions. The first and second loading guides 19 and 20 are exchanged so that their paths intersect at the common guide 22, with the first loading guide 19 moving closer to the rotating drum 23 and the second loading guide 20 moving closer to the rotating drum 23. It extends in the direction away from the rotating drum 23. And the third loading roller bust 12
When the third boat 17 moves along the third loading guide 21, the magnetic tape 14 pulled out from the supply reel 3pI is wound around the rotating drum 23 from the left side in the figure, and the first loading roller last 9 The boat 15 has the first loading guide 19 and the common guide 22.
The magnetic tape 14 pulled out from the take-up reel 4 side when moving along is wound around the rotating drum 23 from the right side in the figure. Then, the second loading roller last 11 moves the second boat 16 following the first boat 15 and transfers the magnetic chi 114 pulled out by the first loading roller last 9 to the first loading roller last 9.
Expand to the opposite side. This expansion is done in order to provide a margin for the tape path of the magnetic tape 14 that is deeply wound around the rotating drum 23 by the first loading roller burst 9 so that the tape can run safely. It is necessary to wrap it around. Reference numeral 24 indicates a plate-shaped pivotable branch pointer arm provided between the entrances of the common guide 22; 25 indicates a plate-shaped pivotable branch pointer arm provided on the exit side of the common guide 22; The branch pointer arm 25 is biased by a spring 26 toward closing the first loading guide 19, and the branch pointer arm 25 is biased by a spring 27 toward closing the second loading guide 20 and held in the closed position by a suitable stop. It has been stopped. Furthermore, the branch pointer arms 24,25 are arranged in the second loading guide 20 and in the first loading guide 1, respectively.
It has projections 28, 29 projecting into the 9. The protrusion 28 is
It is made of an elastic body that can be deformed in a direction parallel to the plane of the drawing.

As shown in FIG. 3, the first loading guide 19 is composed of a pair of edges 212 and 213 that form both openings of the travel path of the first boat 15. As shown in FIG. The first boat 15 has a pin 21 located between both edges 212 and 213.
9, and a pair of plates 21 arranged to sandwich the edge 212213 from both the front and back sides via the pin 219.
4, 215. As described above, the first loading post 9 is provided upright from the boat 15, and a recess 216 made of a small diameter member is formed near the plate 214. This recess 216 is engageable with the branch pointer arm 25 . In addition, the second and third
The loading guide 20.21 and the second and third boats 16.17 are similarly constructed. The second loading roller bust 11 has a 0-branch pointer arm 24 that is configured similarly to the first loading roller bust 9 and is provided at the same height as the edges 212 and 213. Now, both sides of this bifurcated pointer arm 24 are themselves connected to the edge 212°2.
The 0-branch pointer arm 25, which functions as 13,
, is provided at a different height from the second loading guide 19.20 and the common guide 22, and is not particularly restricted by these guides 19.20.22.
Branching operations are possible freely. Due to this difference in height, the branch pointer arm 25 is positioned in the recess 2 as described above.
16.

Reference numeral 30 denotes a capstan fixedly provided on the chassis 1 outside the mounting position of the cassette 2, and the pinch roller 10 closes the notch 6 of the cassette 2 before the loading operation is completed.
The magnetic tape 14 is moved from the magnetic tape 14, presses against the capstan 30, grips the magnetic tape 14, and drives the magnetic tape 14.

Reference numeral 32 denotes an audio cost control head fixedly installed on the chassis 1 between the loading end position of the second loading roller post 11 and the capstan 30. 33
．． 34 are fixed posts arranged on both sides of the audio control head 32. In the loading end position, a stop 35° 36, 37 is provided for supporting each loading roller post 9, 11, 12.

Next, each mechanism for performing the loading operation will be explained. In FIG. 1, 57 is a first circular gear for driving both the first boat 15 of the first loading roller post 9 and the second boat 16 of the second loading roller post 11, and 58 is a third circular gear. This is a second circular arc gear for driving the third boat 17 of the loading roller mast 12. As shown in detail in FIG. 2, the first arc gear 57 has a relatively long first loading arm 59.
A relatively short second loading arm 60 is attached to the pin 61.
The tip of the first loading arm 59 is rotatably attached to the first boat 15 of the first loading roller mast 9, and the tip of the second loading arm 60 is rotatably attached to the first boat 15 of the first loading roller mast 9. It is pivoted to the second boat 16 of the roller mast 11. The first circular gear 57 is connected to a circular guide 64 that is longer than the first circular gear 57 and is fixed along the circumference (in the figure, the lower side) of the rotating drum 23.
The first arcuate gear 57, which can be slid while being guided by the arcuate guide 64, is driven by interlocking with the loading motor 42 and the gear m mechanism 211, and is rotated by being guided by the arcuate guide 64. As a result, the first and second bows 15.16 of the first and second loading roller posts 9.11 are moved along the first and second loading guides 19.20. In addition, the third loading roller last 12
The third boat 17 is also moved by a similar arrangement. The first and second arc gears 57, 58 are arranged vertically shifted from each other.

Next, the loading operation of the magnetic tape 14 will be explained.

Due to the driving force of the loading motor 42, the gear 2
When the first circular gear 57 slides counterclockwise in FIG. 1 through the first and second loading arms 59, 60,
to drive the first and second boats 15 and 16. Then,
The first boat 15 moves while being guided by a first loading guide 19, and the second boat 16 moves while being guided by a second loading guide 20.

As shown in FIG. 4, the first boat 15 of the first loading post 9 is connected to the second boat of the second loading post 11.
It passes the position of the branch pointer arm 24 in advance of the boat 16. At this time, the first boat 15 pushes the branch pointer arm 24 open by causing its pin 219 to hit the side 218 of the branch pointer arm 24.
After that, it enters the common guide 22. During this time, the second boat 16 moves along the second loading guide 20, elastically deforms the protrusion 28, and passes the position of the protrusion 28. Also, when the first boat enters the common guide 22,
As shown in FIG. 5, the branch pointer arm 24 closes the first loading guide 19 again by the force of the spring 26, so that the second loading guide 20 is connected to the common guide 22. The second boat 16 therefore follows the first boat 15 into the common guide 22 .

The bifurcated pointer arm 25 is biased by a spring 27 to close the second loading guide 20 and open the first loading guide 19. For this reason, as shown in FIG. 5, the common guide 22 is normally connected to the first loading guide 19, and the first boat 15 enters the first loading guide 19. Thereafter, as shown in FIG.
By engaging with the protrusion 29 of No. 5, the protrusion 29 is kicked. Therefore, the branch pointer arm 25 rotates clockwise inward and opens the second loading guide 20. At this time, the second boat 16 has reached this side of the branch pointer arm 25, and as the recess 216 engages with the branch pointer arm 25, it is guided by this branch pointer arm 25, and the second boat 16 reaches the front side of the branch pointer arm 25.
The loading guide 20 is entered.

When the loading end position is reached as shown in FIG. 7, the first and second loading roller posts 9.11
Each is supported by stoppers 35 and 36 and positioned at a predetermined position. At this time, the branch pointer arm 25
is returned to its original state by the action of the spring 27, opening the first loading guide 19 and closing the second loading guide 20.

When the first and second boats 15, 16 are thus moved by the first arc gear 57, the second
The circular arc gear 58 connects the loading motor 42 and the gear l.
The third boat 17 is moved by the first loading roller mast 211 to move the third loading roller mast 1.
2 reaches the position of the stopper 37 and is positioned at a predetermined position as shown in FIG.

As shown in FIG. 7, the pinch roller 10 is mounted on a plate-shaped pinch roller arm 75, and as the pinch roller arm 75 rotates, the pinch roller 10 is moved into the notch 6 as shown in FIG. From the position inserted in
As shown in FIG. 7, the magnetic tape 14 is moved to a position where it comes into pressure contact with the capstan 30, and the magnetic tape 14 is sandwiched between it and the capstan 30. This rotation of the pinch roller arm 75 is caused by the rotation of the first and second loading roller posts 9,
11, when these posts 9 and 11 reach the end position of their movement path, the stopper 35
．． It will be performed for the first time when it approaches 36. The starting end portion of the first loading guide 19, the branch pointer arm 24, and parts around it are the pinch roller arm 7.
5 and rotates together with the pinch roller 10. This prevents the occurrence of a situation where the movement of the pinch roller 10 is obstructed by the presence of one of these first loading guides or the branch pointer arm 24. Further, as shown in FIG. 7, one edge of the starting end side portion of the second loading guide 20 is
12 fixed on the side of the chassis 1, but on the other edge 2
13 is provided on the pinch roller arm 75 and rotates together with the pinch roller arm 75.

When the loading operation is completed in this way,
The magnetic tape 14 is wound in a tape path as shown in FIG. That is, the magnetic tape 14 includes a supply reel 3, a tension post 13, and an erasing head 10.
3. It is wound around the rotating drum 23 from the fixed post 104, the third loading roller post 12, and the inclined post 18 fixed to the third boat 17. In addition, the rotating drum 23, the first loading roller last 9, the second
Loading roller post 11, inclined fixed post 33
, audio control head 32, fixed boss 34
, the capstan 30, and the expansion post 8, and are wound along the tape bus to the inter-winding reel 4.

Next, the unloading operation will be explained. When the loading motor 42 is reversed, the first and second boats 15.1
8 starts moving in the opposite direction to that during loading. First, the pinch roller arm 75 returns to its original position from the position shown in FIG. Push open the pointer arm 25 and enter the common guide 22. And this branch pointer arm 2
5 is opened and the protrusion 29 is retracted from the path of the first loading guide 19, the first boat 15 passes the position of the protrusion 29. When the second boat 16 enters the common guide 22 and the branch pointer arm 25 returns to its original state again by the action of the spring 27, the first loading guide 19 is connected to the common guide 22, so that the second boat Following 16, the first boat 15 also enters the common guide 22.

At this time, as in the case of Fig. 6, the branch pointer arm 2
4 is urged by a spring 26 to close the first loading guide 19, so that the common guide 22 is connected between the starting ends of the second loading guide 20. The second boat 16 therefore enters between the common guide 22 and the beginning of the second loading guide 20, and the ninth
As shown in the figure, the second boat 16 pushes against the protrusion 28, thereby causing the branch pointer arm 24 to resist the force of the spring 26.
rotates counterclockwise in the figure, and its tip 220 touches the edge 2.
12, the first loading guide 19 is opened. After the tip 220 hits the edge 212, the protrusion 28
allows the second boat 16 to pass by being elastically deformed.

And at the same time, the first boat 15
From there, the first loading guide 19 is entered.

The first and second boats 15 and 16 are the notches 5 of the cassette 2.
．． 6 and the unloading is completed, the bifurcated pointer arm 24 is again biased by the spring 26 to close the first loading guide. Further, during this unloading, the third boat 17 also moves in the same way and returns to the inside of the notch 7 as before.

Effects of the Invention As described above, according to the present invention, the first and second loading guides that guide the travel of the first and second tape guide posts, respectively, for pulling out the tape from the tape cassette to a predetermined position, Since the structure is configured so that a part of the tape guide post shares the same path, only the space required for installing one loading guide is required in this common part, and the moving distance of both tape guide posts can be made almost the same. Since then, it has become possible to move both using the same drive mechanism,
It is possible to downsize the magnetic recording/reproducing device.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a tape loading device according to an embodiment of the present invention, FIG. 2 is a horizontal plan view of the drive IR for the first and second loading roller posts, and FIG. 3 is a plan view of the area around the loading roller post. 4 to 9 are explanatory views of the operation of the tape loading device, and FIGS. 10 and 11 are schematic diagrams of the conventional tape loading device.

Claims (1)

[Claims] 1. First and second tape guide posts for respectively pulling out the magnetic tape contained in the tape cassette to predetermined locations located outside the tape cassette; A tape cassette is provided with first and second loading guides for respectively guiding travel from the tape cassette to a predetermined location, and the first and second loading guides are configured to partially share the same path. A tape loading device in a magnetic recording/reproducing device.