JPH0656685B2 - Tape loading device in magnetic recording / reproducing apparatus - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tape loading device in a magnetic recording / reproducing device.

2. Description of the Related Art In the conventional tape loading device of a cassette type video tape recorder, a magnetic tape is pulled out from a tape cassette and wound around an outer circumference of a rotating drum arranged in the vicinity of the tape cassette without recording or reproducing a video signal. A tape loading device is generally known in which a magnetic tape is drawn out using one movable loading roller post provided on each of a supply reel side and a take-up reel side of a cassette, and the magnetic tape is wound from both sides of a rotary drum. .

For example, as shown in FIG. 7, the loading roller post 201 on the take-up reel side is moved in the direction of arrow 202 to pull out the magnetic tape 203, and at the same time, the loading post 204 on the supply reel side is moved in the direction of arrow 205. The magnetic tape 203 was pulled out and wound around the rotary drum 206 from both sides.

However, like a video tape recorder with a built-in camera,
In order to make the magnetic recording / reproducing apparatus small, if the rotating drum is made small, it is necessary to wind the magnetic tape deeply around the rotating drum. As shown in FIG. 201 is moved in the direction of arrow 207 to the back of the rotating drum 206. At this time, another post 208 is moved in the direction of arrow 209 in order to secure a stable tape path of the magnetic tape 203. It is already known to extend. Each post 201,204,
208 is moved by an appropriate driving means and these posts 201, 20.
It is performed by a rail-shaped loading guide for forming 4,208 travel routes. 7 and 8
In the figure, 210 is a fixed pinch roller, which applies a running driving force to the magnetic tape 203 by sandwiching the magnetic tape 203 between the pinch roller and the capstan 212 protruding from the tape cassette 211 side. 213 is Capstan 21
2 drive device.

Further, conventionally, as shown in FIG. 9, the capstan 212 is arranged outside the tape cassette 211, and the pinch roller 210 is swung by a swing type pinch arm 215 from the inside of the tape cassette 211 toward the capstan 212 in the direction of arrow 214. It is also known to move to. This way,
Since the drive device 213 of the capstan 212 can be installed at a position separated from the tape cassette 211, the tape cassette 211 and the drive device 213 do not overlap with each other as shown in FIGS. 7 and 8. The advantage of being able to reduce the thickness of the device in the direction perpendicular to the plane of the drawing is.

Therefore, by adopting a new configuration in which the device shown in FIG. 8 and the device shown in FIG. 9 are combined, the rotary drum 206 can be downsized and the thickness of the device can be reduced at the same time. It can be expected that it will greatly contribute to the miniaturization of.

Problems to be Solved by the Invention However, if such a combination is attempted,
The movement paths of the posts 201 and 208 indicated by arrows 207 and 209 in the figure and the movement paths of the pinch rollers 210 indicated by arrow 214 in FIG. 9 may intersect. If there is such an intersection, the pinch arms 215 exist before the start of loading when the posts 201, 208 and the pinch rollers 210 are present inside the tape cassette 211.
And the rail-shaped loading guide for guiding the posts 201, 208 may interfere with each other. Therefore,
In order to avoid such interference, it is necessary to give a clearance especially between the members in the thickness direction of the device, and an extra space is required for this clearance, which causes a new problem of hindering downsizing of the device. Occurs.

Therefore, an object of the present invention is to solve such a problem and to prevent interference between the pinch arm and the loading guide without giving a relief so as not to hinder the miniaturization of the device. .

Means for Solving the Problems In order to achieve the above object, the present invention provides a tape guide for pulling a tape passed between a supply reel and a take-up reel of a tape cassette from the tape cassette to a predetermined position. A post, a loading guide that constitutes a traveling path of the tape guide post from the tape cassette to a predetermined position, a pinch arm that can pivot about an axis, and a pinch arm that is attached to the pinch arm. A pinch roller that moves a path that intersects with the traveling path of the tape guide post from the inside of the tape cassette to the installation position of the capstan outside the tape cassette, and sandwiches the tape pulled out by the tape guide post with the capstan. And a part of the loading guide at the loading start end side Is formed on the pinch arm.

With this structure, a part of the starting end of the loading guide for guiding the travel of the tape guide post is formed integrally with the pinch arm itself, preventing mutual interference without giving a clearance between the two. It becomes possible, and the device can be downsized particularly in the thickness direction.

Embodiment 1 In FIG. 1, reference numeral 1 is a main body chassis, 2 is a tape cassette mounted on the chassis 1, and a supply reel 3 and a take-up reel 4 are arranged in the cassette 2. When the cassette 2 is mounted on the chassis 1, the expansion post 8 for recording / reproducing mounting and the first loading roller post 9 and the pinch are formed in the notches 5, 6 and 7 formed in the front and bottom parts of the cassette 2. Roller 10 and second loading roller post 11 and third loading roller post 12
And the tension post 13 are inserted inside the magnetic tape 14, respectively. Reference numerals 15, 16 and 17 are first, second and third boats on which the first, second and third loading roller posts 9, 11, 12 are mounted. 19,20,21 are the first, second and third boats 15,16,
Rail-shaped first, second and third guides 17 respectively
The first and second loading guides 19 and 20 are formed with a common guide 22 at an intermediate portion, and the first and second loading guides 19 and 20 are formed so that the paths intersect at the common guide 22. The first loading guide 19 extends toward the rotary drum 23 and the second loading guide 20 extends away from the rotary drum 23. And the third loading roller post 12
Winds the magnetic tape 14 drawn from the supply reel 3 side around the rotary drum 23 on the left side of the drawing when the third boat 17 moves along the third loading guide 21, and the first loading roller post 9 is When the first board 15 moves along the first loading guide 19 and the common guide 22, the magnetic tape 14 drawn from the take-up reel 4 side is wound around the rotary drum 23 from the right side in the drawing. The second loading roller post 11 includes the second boat 16 and the first boat 15
To move to the first loading roller post 9
The magnetic tape 14 pulled out by the above is expanded to the side opposite to the first loading roller post 9. 24 is a common guide
A plate-shaped swivel type branch pointer arm provided on the inlet side of 22 and a plate-shaped swivel type branch pointer arm provided on the outlet side of the common guide 22.
The spring 24 is biased by the spring 26 toward the first loading guide 19, and the branch pointer arm 25 is biased by the spring 27 toward the second loading guide 20. It is locked.

As shown in FIG. 4, the rail-shaped first loading guide 19 is composed of a pair of edge portions 111 and 112 forming both sides of the traveling path of the first boat 15. First boat 15
Is a pin 113 located between the two edges 111 and 112, and this pin 11
It is composed of a pair of plates 114 and 115 arranged so as to sandwich the edge portions 111 and 112 from both front and back sides with the plate 3 interposed therebetween.
The first loading post 9 is a plate.
It stands on 114. The second and third loading guides 20 and 21 and the second and third boats 16 and 17 have the same structure. The branch pointer arm 24 has an edge 111,
This branch pointer arm 2 is installed at the same height as 112.
In the 4 position, both sides of this branch pointer arm 24 themselves act as edges 111, 112.

Reference numeral 30 denotes a capstan fixedly provided on the chassis 1 outside the mounting position of the cassette 2. Reference numeral 32 is an audio control head fixed to the chassis 1 between the loading end position of the second loading roller post 11 and the capstan 30. 33 and 34 are fixed posts arranged on both sides of the audio control head 32.
Stoppers 35, 36, 37 for supporting the loading roller posts 9, 11, 12 are provided at the loading end position.

Next, each mechanism for performing the loading operation will be described. In FIG. 1, 57 is a first arc gear for driving both the first boat 15 of the first loading roller post 9 and the second boat 16 of the second loading post 11, and 58 is a third arc gear. 2 is a second arc gear for driving the third boat 17 of the loading roller post 12 of FIG.
As shown in detail in FIG. 3, the first arc gear 57 includes a relatively long first loading arm 59 and a relatively short second loading arm 59.
Loading arm 60 is rotatably provided via a pin 61, and the tip of the first loading arm 59 is pivotally attached to the first boat 15 of the first loading roller post 9 and the second loading arm 60. Is attached to the second boat 16 of the second loading roller post 11 by a shaft. The first arc gear 57 is slidable by being guided by an arc guide 64, which is fixed along the peripheral portion (lower side in the figure) of the rotary drum 23 and is longer than the first arc gear 57. The first arc gear 57 is driven by interlocking with the loading motor 42 and the gear mechanism 116, and the arc guide 64
To drive. As a result, the first and second boats 1 of the first and second loading roller posts 9 and 11 are provided.
5, 16 are moved along the first and second loading guides 19, 20. The third loading roller post 12
The third boat 17 is also moved by the similar configuration.
The first and second arcuate gears 57, 58 are arranged with their positions vertically displaced from each other.

Reference numeral 75 is a swivel type pinch arm formed in a substantially fan-shaped plate shape. As shown in FIG. 2, a boss portion 76 serving as a swivel center is rotatable about a shaft 77 set up on the chassis 1. It is pivotally supported. The pinch roller 10 is mounted on the upper surface of the tip of the pinch arm 75. Several tooth portions 78 are formed on a part of the peripheral surface of the boss portion 76. 68 is a pinch arm
A sector arm for driving the 75, the center of which is the axis
A tooth portion 70 that is rotatably supported by 69 and that engages with a tooth portion 78 of the boss portion 76 of the pinch arm 75 is formed at one end thereof. A cam pin 72 is provided at the other end of the sector arm 68, and the cam pin 72 is engaged with a cam groove 48 of a cam gear 47 that forms a part of the gear mechanism 116. The cam groove 48 has an arc portion 48a that extends substantially along the outer periphery of the cam gear 47.
And a bent portion 48b that is bent toward the center of the cam gear 47 continuously from the end of the arc portion 48a. A pressing lever 117 is rotatably supported by a shaft 80.
One end of the pressing lever 117 is biased by a spring 118 in the counterclockwise direction in the figure. Edge 1 on the presser lever 117
19 is formed, and this edge 119 engages with the fixing pin 83 of the pinch arm 75 when the pressing lever 117 is biased counterclockwise by the spring 118, and the pinch arm 75
Can be prevented from turning. A cam surface 120 is formed on the other end of the presser lever 117. The cam gear 47 has a cam piece 121.
The cam piece 121 contacts the cam surface 120 by the rotation of the cam gear 47, and the pressing lever 117 is spring-loaded.
Rotate in the direction of the time shown in the figure against 118, so that edge 119
The engagement between the fixing pin 83 and the fixing pin 83 can be released.

A pinch arm is provided between the starting end side portion of the first loading guide 19, the branch point arm 24, and the peripheral parts.
It is mounted on 75 and rotates with the pinch roller 10. Further, at the starting end side portion of the second loading guide 20, as shown in FIG.
The other edge 112 is fixed to the side of the pinch arm 75, and the other edge 112 is provided on the pinch arm 75 and pivots integrally with the pinch arm 75.

Next, the loading operation of the magnetic tape 14 will be described. When the first arc gear 57 slides in the counterclockwise direction in FIG. 1 via the gear mechanism 116 by the driving force of the loading motor 42, the first arc gear 57 moves the first arc gear 57 and the second arc gear 57.
The first and second boats 15 and 16 are driven via the loading arms 59 and 60. Then, the first boat 15 moves while being guided by the first loading guide 19, and the second boat 16 moves while being guided by the second loading guide 20. Then, the first boat 15 pushes open the branch pointer arm 24 against the spring 26, and enters the common guide 22. In addition, the second boat 16 is first
It is guided by the branch pointer arm 24 which has returned to the original state shown in the figure, and also enters the common guide 22.

The first boat 15 that has moved along the common guide 22 is guided by the branch pointer arm 25 and enters the end portion of the first loading guide 19. Then, as shown in FIG. 5, the first loading roller post 9 pushes the branch pointer arm 25 against the spring 27 to open the starting end side portion of the second loading guide 20, and the second boat 16
To guide you in that direction. At the same time, the third boat 17 also moves toward the starting end side of the third loading guide 21.

Until the state shown in FIG. 5, the cam pin 72 of the sector arm 68 is engaged with the arc portion 48a of the cam groove 48, and the fixing pin 83 is engaged with the edge 119 of the presser lever 117. Therefore, the sector arm 68 is held at the position shown in FIG. Now, in the state shown in FIG. 5, the cam piece 121 of the cam gear 47 rotated by the loading motor 42 is in contact with the cam surface 120 of the presser lever 117, and when the cam gear 47 further rotates from this state, When the cam piece 121 pushes the pressing lever 117 against the spring 118, the engagement between the edge 119 and the fixing pin 83 is released.

At this point, the cam pin 72 reaches the bent portion 48b of the cam groove 48, and the cam arm 72 is guided by the bent portion 48b so that the sector arm 68 swings counterclockwise around the axis 69 in the figure. Move. Then, the tooth portion 70 pivots the pinch arm 75 clockwise through the tooth portion 78, which causes the pinch roller 75 to rotate.
10 moves on a path that intersects with the traveling path of the first boat 15, contacts the capstan 30 and sandwiches the magnetic tape 14 as shown in FIG. The sector arm 68 has a tapered edge 122 that gradually increases in distance from the shaft 69 as the sector arm 68 rotates counterclockwise around the shaft 69 in the drawing. Engages with the fixing pin 83 of the pinch arm 75 to generate a biasing force in the clockwise direction in the figure, so that the pinch roller 10 is pressed against the capstan 30 with a predetermined pressing force. As shown in FIG. 6, when the tapered edge 122 and the fixing pin 83 are engaged with each other, the tooth portion 70 of the sector arm 68 is
Is separated from the tooth portion 78 of the pinch arm 75, and the engagement between the two is released.

FIG. 6 shows the loading completed state, and the first, second, and third loading posts 9, 11, 12 are supported by stoppers 35, 36, 37, respectively, and positioned at predetermined positions.

Next, the unloading operation will be described. When the loading motor 42 is rotated in the reverse direction, the cam gear 47 rotates counterclockwise in the drawing, and the cam groove 48 guides the cam pin 72 so that the sector arm 68 rotates clockwise around the shaft 69. As a result, first, the engagement between the taper edge 122 and the cam pin 72 is released, and the pressing force of the pinch roller 10 is reduced. Then, as the cam piece 121 moves away from the cam surface 120, the fixing pin 83 engages with the edge 119 again, and the pinch arm 75 is locked at the original position.

The above operation is completed in the initial stage of the unloading operation due to the shape of the cam groove 48, but thereafter, the loading motor 42 is further rotated, whereby both boats 1
5, 16 enter the common guide 22. Then, first, the second boat 16 is guided by the branch pointer arm 24 and the second boat 16
When the second boat 16 kicks the branch pointer arm 24, the first loading guide 19 is opened, and the first boat 15 enters there. Similarly, the third boat 17 also moves toward the starting end side of the third loading guide 21, and finally returns to the unloading state shown in FIG.

As described above, according to the present invention, since a part of the loading guide for guiding the travel of the tape guide post is formed on the pinch arm itself, the travel path of the tape guide post and the travel path of the pinch roller. Despite the fact that they intersect with each other, it is possible to prevent interference between the loading guide and the pinch arm without giving a clearance in the thickness direction, and thus to downsize the device. it can.

[Brief description of drawings]

FIG. 1 is a plan view of a tape loading device according to an embodiment of the present invention, FIG. 2 is a front view around a pinch arm in FIG. 1, and FIG. 3 is a view for first and second loading roller posts. FIG. 4 is a plan view of the drive mechanism, FIG. 4 is a front view around the loading roller post, FIGS. 5 and 6 are operation explanatory views of the tape loading device, and FIGS. 7 to 9 are schematic configurations of a conventional tape loading device. It is a figure. 2 ... Tape cassette, 3 ... Supply side reel, 4 ... Winding side reel, 9, 11, 12 ... Loading roller post (tape guide post), 10 ... Pinch roller, 14 ... Magnetic tape,
19 ... First loading guide, 30 ... Capstan, 75
… Pinch arm, 77… axis.

Claims (1)

[Claims] 1. A tape guide post for pulling a tape passed between a supply side reel and a take-up side reel of a tape cassette from the tape cassette to a predetermined position, and from the tape cassette of the tape guide post. A loading guide that constitutes a traveling path to a predetermined position, a pinch arm that can be swiveled around an axis, and a path that intersects with the traveling path of the tape guide post that is attached to the pinch arm and that swivels the tape guide post. A pinch roller that moves from inside the cassette to the installation position of the capstan outside the tape cassette and sandwiches the tape pulled out by the tape guide post between the capstan and the part; Recording / reproducing apparatus in which the pinch arm is formed Tape loading device definitive.