JPH071577B2 - Tape loading device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape loading device used in a video tape recorder.

2. Description of the Related Art Conventionally, a tape of a cassette type video tape recorder which pulls out a magnetic tape from a tape cassette and attaches the magnetic tape to the outer circumference of a rotary head cylinder arranged near the tape cassette to record or reproduce a video signal. In the loading device, when the tape cassette held by the cassette holder is set at a predetermined position, the tape pull-out pin 103 is inserted through the notch 102 of the tape cassette 101 as shown in FIG. Ten
Located inside the four. Then, by moving the tape pull-out pin 103 in the direction of arrow a, the tape cassette 101
The inner magnetic tape 104 is generally configured to be pulled out of the tape cassette. In FIG. 6, reference numeral 105 denotes a magnetic tape 104 in a state where the drawn magnetic tape 104 is attached to the outer circumference of the rotary head cylinder.
A pin (also referred to as a post) for guiding the travel of 104, which is attached to the same support member 106 so as to move together with the tape pull-out pin 103.

However, in the conventional tape loading device, when the tape cassette is used in a horizontal state, for example, no serious problem occurs, but the short side surface of the tape cassette is vertical or almost vertical. In the case of using the tape, the supporting member 106 including the tape pull-out pin 103 and the pin 105 may be displaced in the direction of arrow a by its own weight [Fig. 6 (B)].
reference〕. Therefore, in this state, when the tape cassette 101 is moved in the insertion direction of the tape pull-out pin 103 for recording or playback, that is, in the direction perpendicular to the paper surface of the drawing, the magnetic tape 104 is moved to the tape pull-out pin 103. There was a problem of contact with and damage.

Therefore, in order to solve this problem, as a tape loading device in which the tape pull-out means is not unnecessarily displaced (displaced) by its own weight or the like when it is in the non-pull-out position as illustrated in FIG. 6 (A). The one proposed in JP-A-61-148661 is known. In the tape loading device disclosed in this publication, when a movable support member that erects a tape pull-out pin or the like returns to a non-pull-out position, the support member is made of an elastic plate-like member at its end portion. Of the tongue-like portion, and the tongue-like portion presses the support member from above with elastic force to extend the support member and stop the movement of the tape withdrawal pin or the like. There is. However, in the structure described in this publication, since the support member is only pressed from above by the tongue-shaped portion, it is not sufficient to prevent movement in the tape pull-out direction.

The present invention solves such a problem, and an object of the present invention is to reliably prevent displacement (positional deviation) of the tape pull-out means at the non-pull-out position.

Means for Solving the Problems In order to solve this problem, the present invention provides a magnetic tape inside a tape cassette for pulling out the magnetic tape from the tape cassette and abutting it on the outer circumference of the rotary head cylinder. A tape pull-out means movable between a pull-out position and a pull-out position outside the tape cassette, and a drive for driving the tape pull-out means along the loading guide so as to move the tape pull-out means between the non-pull-out position and the pull-out position. Means and a holding arm that is rotatably supported by a shaft and is urged to rotate by an elastic body and has a cam portion on its outer surface. When the tape drawing means is in the non-drawing position, the holding arm is A cam portion presses one side surface of the tape pull-out means to move the tape pull-out means to the loading guide. It is configured to be pressed against the terminal end side.

With this configuration, since the tape pull-out means is pressed against the end portion side by the holding arm at the end portion of the loading guide at the non-pull-out position, the tape pull-out means is displaced at the non-pull-out position, that is, inside the magnetic tape in the tape cassette (Positional deviation) can be reliably prevented, and damage to the magnetic tape by the tape pull-out means can be prevented.

Example One example of the present invention will be described below with reference to FIGS. 1 to 5.

First, in FIGS. 1 to 3, 1 is a main body chassis, 2
Is a tape cassette mounted on the chassis 1. Inside the tape cassette 2, a supply-side reel 3 and a winding-side reel 4 are arranged. When the tape cassette 2 is mounted on the chassis 1, the expansion post 8 and the first loading roller post 9 of the recording / reproducing apparatus are formed in the notches 5, 6, 7 formed in the front and bottom parts of the tape cassette 2. Pinch roller 10, second loading roller post 11 and third
Loading roller post 12 and tension post
13 and 13 are inserted inside the magnetic tape 14, respectively. 15,1
6, 17 are first, second and third loading roller posts
The first, second and third boats with 9,11,12
The third boat 17 has a third loading roller post 12
An inclined post 18 is provided on the outside of the disk, and is inserted into the cutout portion 7 together with the third loading roller post 12. 1
Reference numerals 9, 20, and 21 are first, second, and third loading guides for guiding the first, second, and third boats 15, 16, 17 respectively during the loading operation. The guides 19 and 20 are formed with a common guide 22 at an intermediate portion. The first and second loading guides 19 and 20 are replaced with each other so that they intersect at the common guide 22, and the first loading guide 19 has a rotary head cylinder 23. The second loading guide 20 extends in a direction away from the rotary head cylinder 23 in a direction approaching. Then, the third loading roller post 12 supplies the supply reel 3 when the third boat 17 moves along the third loading guide 21.
Magnetic tape 14 pulled out from the side
The first loading roller post 9 is wound around 23 from the left side of the drawing, and the first boat is the first loading guide 19
Take-up reel 4 when moving along with common guide 22
Magnetic tape 14 pulled out from the side
The second loading roller post 11 is wound around the second boat 16 from the right side of the figure, and the second boat 16 is attached to 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 branch pointer arm provided on the inlet side of 22 and a branch pointer arm 25 provided on the outlet side of the common guide 22. The branch pointer arm 24 closes the first loading guide 19 by a spring (not shown). The branch pointer arm 25 is biased to the side that closes the second loading guide 20 by a spring (not shown). Further, the branch pointer arms 24 and 25 are provided in the second loading guide 20 and the first loading guide 19 respectively.
Branch pointer arm 25 having protrusions 28 and 29 protruding inward.
When the first boat 15 of the first loading roller post 9 that precedes the loading operation enters the first loading guide 19 from the common guide 22 and kicks the protrusion 29 of the branch pointer arm 25, the branch pointer The arm 25 is configured to pivot against a spring to cause the second boat 16 of the subsequent second loading roller post 11 to enter from the common guide 22 into the second loading guide 20, while the bifurcation pointer. The second loading roller post 11 that precedes the arm 24 during the unloading operation
When the second boat 16 enters into the second loading guide 20 and kicks the protrusion 29 of the branch pointer arm 24, the branch pointer arm 24 rotates against the spring, and the subsequent first
The boat 15 is configured to enter into the first loading guide 19.

Reference numeral 30 denotes a capstan fixedly provided on the chassis 1 outside the mounting position of the tape cassette 2, the upper and lower ends of which are supported by bearings 31, and the punch roller 10 cuts the tape cassette 2 before the completion of the loading operation. The magnetic tape 14 is moved from the portion 6 and pressed against the capstan 30, and the magnetic tape 14 is held and driven. 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. Reference numerals 33 and 34 denote fixed posts arranged on both sides of the audio control head 32. The fixed posts 33 are provided in an inclined manner, and the first stopper 35 and the second stopper 36 are inclined at the loading end position. The inclination of the magnetic tape 14 caused by the first loading roller post 9 and the second loading roller post 11 supported by the is corrected by the inclination fixing post 33 located near the second stopper 36, and the horizontal path Returned to. 37
Is a third stopper that supports the third loading roller post 12 at the loading end position.

Reference numeral 38 is a loading assisting post which is brought into contact with the magnetic tape 14 during the loading operation, and is interlocked with the boss portion 40 fitted to the shaft 39 which is erected on the chassis 1 so as to avoid the capstan 30. Arm 41 bent and extended
The arm 41 is rotated immediately after passing the first and second loading roller posts 9 and 11 after the loading is started, and the loading auxiliary post 38 advances to a position where it crosses the tape path being pulled out. The magnetic tape 14 is pressed to correct the twist of the magnetic tape 14 to enable an orderly and smooth loading operation of the magnetic tape 14, and the pinch roller 10 that moves backward after the loading operation and moves after the loading operation ends is capped. It is configured so as not to prevent pressure contact with the stun 30. At this time, the expansion post 8 is moved to the position shown in FIG.
The tape path to the audio control head 32 and capstan 30 is smooth.

Next, each mechanism for performing the loading operation will be described. In FIG. 1, the driving force of the loading motor 42 is transmitted from the worm gear 43 to the cam gear 47 via the gears 44a and 44b, the gears 45a and 45b, and the gear 46. A first cam groove 48 for driving the pinch roller 10 toward the capstan 30 is provided on the upper surface of the cam gear 47, and a loading auxiliary post 38 is branched from a position near the end of the first cam groove 48. A second cam groove 49 is provided for the purpose. Further, the rotational force of the cam gear 47 is the gear 50 and the gear 51 that mesh with it.
Is transmitted to the loading main gear 52 via the gear, and the rotational force is further transmitted to the loading main gear 52 by a gear 53 coaxially connected thereto.
Is transmitted to the first loading gear 54 via the gears 55a and 55b, and is transmitted to the second loading gear 56 via the gears 55a and 55b.

In FIG. 4, 57 is a first circular arc gear for driving 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 loading gear. It is a second arc gear for driving the third boat 17 of the roller post 12, and a first arc gear 57
A relatively long first loading arm 59 and a relatively short second loading arm 60 are rotatably provided via a support shaft 61, and the tip of the first loading arm 59 is the first loading roller post. 9 is attached to the first boat 15 and the end of the second loading arm 60 is attached to the second boat 16 of the second loading roller post 11; The loading arm 62 is rotatably provided via the support shaft 63, and the tip of the third loading arm 62 is pivotally attached to the third boat 17 of the third loading roller post 12. Furthermore the first
The circular arc gear 57 is slidable by being guided by a first circular arc guide 64 which is provided along the circumference of the rotary head cylinder 23 and is longer than the first circular arc gear 57. Of the first and second loading roller posts 9 and 11 meshes with the first circular arc gear 57 via the notch portion 65 provided in the first circular arc guide 64 to drive the first circular arc gear 57. The first and second boats 15 and 16 are moved along the first and second loading guides 19 and 20. Also, the second
The circular arc gear 58 is slidable by being guided by a second circular arc guide 66, which is provided along the circumference of the rotary head cylinder 23 and is longer than the second circular arc gear 58. Engages with the second arc gear 58 through the notch 67 provided in the second arc guide 66 to drive the second arc gear 58 to drive the third boat 17 of the third loading roller post 12. Is moved along the third loading guide 21. Further, the first circular arc guide 64 and the second circular arc guide 66 are provided so as to be vertically displaced, and further, a part of each other is vertically overlapped.

In FIG. 1, reference numeral 68 denotes a sector arm for driving the pinch roller 10, the center portion thereof is rotatably supported by a shaft 69, and several tooth portions 70 are formed in a part of the arc portion at the tip. At the same time, the remaining portion is formed in the toothless portion 71 in an arc shape, and the other end portion is provided with a cam pin 72 that engages with the first cam groove 48 of the cam gear 47. 75 is the pinch roller 10
Is a substantially fan-shaped pinch roller arm in which a boss portion 76, which is the center of rotation provided at the center of the arm, is rotatably supported by a shaft 77 set up in the chassis 1. The pinch roller 10 is mounted on the upper surface of one end of the arm 75, and the first loading guide is mounted on the upper surface of the remaining portion.
19 common guides 22 Part to entrance and branch pointer arm
24 is provided, and a part of the peripheral surface of the boss portion 76 at the center of rotation of the pinch roller arm 75 has several tooth portions that engage with the tooth portions 70 of the sector arm 68 in the posture before the start of the loading operation.
78 are formed.

Reference numeral 90 denotes an arm for driving the loading assisting post 38. The central portion is erected on the chassis 1 and is rotatably supported by a shaft 91. One end of the arm is engaged with the first cam groove 48 of the cam gear 47. A matching cam pin 92 is provided. Reference numeral 93 denotes a toothed lever pivotally attached to the other end of the arm 90, and the rack 94 provided at the tip of the lever 94 meshes with a gear 95 fixed to a boss portion 40 to which the arm 41 of the loading assistance post 38 is connected. There is.

Next, the loading operation of the magnetic tape 14 will be described. The driving force of the loading motor 42 causes the cam gear 47 to rotate clockwise, the loading main gear 52 to rotate counterclockwise, the first loading gear 54 to rotate clockwise, and the second loading gear 56 to rotate counterclockwise. Rotate to
The first arc gear 57 slides counterclockwise guided by the first arc guide 64, while the second arc gear 58 slides clockwise guided by the second arc guide 66.
At this time, the first arc gear 57 drives the first and second boats 15 and 16 via the first and second loading arms 59 and 60, and the second arc gear 58 moves to the third loading arm. The third boat 17 is driven via 62. Therefore, the first boat 15 is moved by being guided by the first loading guide 19, the second boat 16 is moved by being guided by the second loading guide 20, and the third boat 17 is moved by the third loading guide 19. Guide 21 moves. Then, the first boat 15 of the first loading roller post 9 passes the branch pointer arm 24 ahead of the second boat 16 of the second loading roller post 11, and further advances the common guide 22 together. At this time, the loading assistance post
The arm 41 of the 38 protrudes to a position where the loading auxiliary post 38 crosses the tape path via the arm 90 and the toothed lever 93 that follow the first cam groove 48 of the cam gear 47, and the post having a predetermined inclination is taped. Press on the magnetic tape 14 from the outside of the loop. The movement of the first boat 15 and the second boat 16 further progresses, and at the branch point, the branch pointer arm 25 causes the first boat 15 to approach the first loading guide 19, and the second boat 16 Second loading guide
It is sorted so as to approach 20. In the vicinity of the first stopper 35, the first loading guide 19 is inclined downward, and the first loading roller post 9 is supported by the first stopper 35 in a posture that substantially follows the inclination of the rotary head cylinder 23, A magnetic tape 14 is wound around the rotary head cylinder 23 to form a tape path.

In addition, the second loading guide 20 is inclined upward near the second stopper 36, and the second loading roller post 11 is in a posture that substantially follows the inclination of the first loading roller post 9 and the second stopper 36. Supported by.

At this time, the cam pin 92 of the arm 90 relating to the driving of the loading assist post 38 is guided to the second cam groove 49 of the gear 47, the loading assist post 38 is rapidly retracted, and the cam pin 72 of the sector arm 68 is almost simultaneously moved. Is guided to the first cam groove 48 of the cam gear 47, and the pinch roller arm 75 rotates to press the pinch roller 10 to the capstan 30. At the same time, the expansion post 8 rotates to the position shown in FIG. 3 to expand the tape path, and the rotary head cylinder 23, the first loading roller post 9, and the second loading roller post.
11, inclined fixed post 33, audio control head 32, capstan 30, expansion post 8, take-up reel 4
To form a tape path leading to and to smooth the running of the magnetic tape 14 sent by the capstan 30.

Next, the first boat at the end of the unloading operation
15 positioning mechanisms will be described. FIG. 5 is a plan view showing details of a portion of the first loading guide 19 up to the common guide 22 entrance.

Reference numeral 96 denotes a holding arm that presses the first boat 15 toward the terminal end side of the first loading guide 19 at the terminal end of the first loading guide 19 in the non-pulled-out position, and is pivotally supported by the shaft 97. The spring 98 urges the first boat 15 in a direction to press it. More specifically, the holding arm 96 has a surface 96a that is in contact with the first boat 15 and is formed in an arc shape, and when the first boat 15 returns to the unloading direction, that is, the non-pull-out position, The outer surface of the lower end of the first loading roller post 9 comes into contact with the arcuate surface 96a so that the holding arm 96 is inserted from above the first loading guide 19.
Is pushed against the force of the spring 98 and moved to the end of the first loading guide 19. Also, the first boat 15
Also when the loading is started from the terminal end of the first loading guide 19, that is, from the non-drawing position.
Is pushed against the force of the spring 98 to move on the first loading guide 19. By the way, since the holding arm 96 pushes the first boat 15 toward the terminal end side in the state where the holding arm 96 is positioned at the terminal end portion of the first loading guide 19 as described above,
15 positionings are made. Here, since the first boat 15 and the second boat 16 are connected to each other by the loading arms 59 and 60 and the support shaft 61 as shown in FIG. 4, the first boat 15 is When positioned at the end of the first loading guide 19, the second boat 16
Is also positioned at the end of the second loading guide 20, so that displacement (displacement) of the first and second loading roller posts 9, 11 in the notches 5 and 6 of the cassette 2 is prevented. .

According to the above-described embodiment, the holding arm 96 has the first boat 15
The first boat 15 can be surely positioned by pressing the first boat 15 toward the terminal end side, and at the same time, the second boat 16 connected through the loading arm can also be surely positioned. Gear 57, first loading gear 54, gear 53, loading main gear 52, gears 51, 50
The first boat 15 and the second boat 16 can be reliably and elastically held even if there is a back crash caused by the engagement of the above. Therefore, the risk of damaging the tape during attachment / detachment of the tape cassette is greatly reduced. Although not shown in the drawing, when the lower end outer surface of the first loading roller post 9 of the first boat 15 is not in contact with the holding arm 96, the holding arm 96 is rotated by a predetermined angle by the spring 98. A stopper that stops the holding arm 96 at a constant angle is provided so as not to do so. Further, the positioning mechanism may be applied to the third boat 17 having the third loading roller post 12.

In the above-described embodiment, the case where the holding arm 96 is provided in the video tape recorder shown in FIGS. 1 to 3 has been described, but it goes without saying that the holding arm 96 can also be applied to a video tape recorder having another tape loading mechanism. .

EFFECTS OF THE INVENTION As described above, according to the present invention, since the tape pull-out means is pressed toward the end portion side by the holding arm at the end portion of the loading guide in the non-pull-out position, the non-pull-out position, that is, the inner side of the magnetic tape in the tape cassette. It is possible to reliably prevent the displacement (positional deviation) of the tape pull-out means in the above step, and to prevent the magnetic tape from being damaged by the tape pull-out means.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a plan view of a magnetic recording / reproducing apparatus using a tape loading device before starting tape loading, and FIG. 2 is a plan view of the same tape loading process. 3 and 4 are plan views of the same after the tape loading is completed, FIGS. 4 (A) and 4 (B) are plan views of the main part of the drive means of the tape loading device, and FIG. 5 is a plan view of the positioning mechanism of the tape pull-out means. 6 (A) and 6 (B) are plan views of a main part of a conventional example. 2 ... Tape cassette, 5-7 ... Notch, 9 ... First loading roller post, 11 ... Second loading roller post, 13 ... Third loading roller post, 14 ... Magnetic tape, 15-17 ... First ~ 3rd boat, 19-21 ... 1st
~ Third loading guide, 23 ... Rotating head cylinder, 42 ... Loading motor, 96 ... Holding arm, 96a ...
Face, 97 ... Axis, 98 ... Spring.

Claims (1)

[Claims] 1. A magnetic tape in a tape cassette between a non-pull-out position inside the magnetic tape and a pull-out position outside the tape cassette so as to be attached to the outer circumference of the rotary head cylinder. A tape pull-out means that can move the tape pull-out means, a drive means that drives the tape pull-out means along the loading guide so as to move the tape pull-out means between the non-pull-out position and the pull-out position, and rotatably supported by an elastic body. A holding arm that is urged to rotate and has a cam portion on its outer surface, and the cam portion of the holding arm presses one side surface of the tape pulling means when the tape pulling means is in the non-drawing position. Thus, the tape loader configured to press the tape pull-out means to the terminal end side of the loading guide. Grayed apparatus.