JPS6356857A - Record carrier loading device - Google Patents

Abstract

PURPOSE:To reduce the load necessary for driving and to miniaturize and light- weighing the driving source by pressing to a catching member a 2nd guide post unit by the pressing member displacing according to the cam which is provided on the rotary member to rotate for moving a 1st guide post unit. CONSTITUTION:The structure to press for a catch 42 the 2nd guide post unit 20 by the cam 41 rotating by the cam 46 provided on a loading ring 1 is made and the pressing force for the catch 42 is obtd. by a spring. The driving load of the loading ring 1 and driven ring 6 does not become large so much even if the energizing force of this spring is made large enough. In this way the loading motor can be miniaturized and light-weighed and the sure catching of the guide post unit is enabled as well.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a record carrier loading device for loading a record carrier into a predetermined position.

<Prior Art> As this type of loading device, there is a tape loading device used in a video tape recorder (VTR), and this tape loading device will be described below as an example.

The running system of a VTR has conventionally been determined almost uniformly depending on the system. However, in recent years, with the miniaturization of VTRs, new tape running systems have been actively developed. An example thereof will be explained using FIG.

FIG. 4 is a diagram showing the tape running system of a conventional VTR.
In the figure, reference numeral 51 denotes a rotary head cylinder having a rotary head on its outer periphery; 53a and 53b are movable guide posts forming a first guide post unit; 55a and 55b are movable guide posts forming a second guide post unit;
1 is the supply reel 72 is the take-up reel, 73° 74.75
, 76 and 77 are fixed guide posts, 78 is a movable guide post, 79 is a capstan, 8o is a pinch roller that moves together with the movable guide post 78, 81 is a tape tension control bottle, and T is a magnetic tape.

In the configuration as described above, the first. The second moving guide post unit pulls out the tape T from the opening of a cassette (not shown) that stores both reels 71 and 72, and is locked and fixed by a catching member (not shown) at the position shown in FIG. .

In the tape running system shown in FIG. 4, the height of the tape T is raised toward the position where the tape T enters the cylinder 1, and the height of the tape T is raised to the same height as the take-up reel 72 while being wound around the cylinder 1. The tape is lowered until the height of the VTR is lowered, and this tape loading method is effective in lowering the height of the VTR.

In this system, the moving guide posts 55a and 55b provided in the second guide post unit 55, which provide a vector for raising the tape, are important posts for stable running of the tape, and the accuracy of position and tilt is important. It is necessary to catch it firmly so that it appears.

FIG. 5 shows a conventional loading device of this type, in which 51 is a head cylinder, 52 is a tenth dewing ring, 53 is a first guide post unit, 53a, 53b.
is a movable tape guide provided in the first guide post unit and moves together with the unit; 54 is a 20th dewing ring; 55 is a second guide post unit; 55a;
55b is a movable tape guide provided on the second guide post unit and moves together with the unit; 56 is a loading motor; 56a is a gear fixed to the drive shaft of the loading motor 56; and 57 is a gear 56a and the tenth deng ring 52. 58 is a gear that meshes with the gear 57 and the 20th dewing ring 54; 59a and 59b are catchers for the 10th dewing unit 53 and the 20th deing unit 55, respectively;
is magnetic tape.

In the above configuration, when the loading motor 56 rotates, the first loading ring 52 rotates via the gears 56a and 57, and is also decelerated by the gears 57 and 58, so that the 20th loading ring 54 rotates to the 10th loading ring 52. It rotates in the same direction through a smaller angle but at a slower speed. At the end of loading, the first and second guide post units 53 and 55 are simultaneously caught by catchers 59a and 59b, respectively.

This catching is for each guide post unit 53°55
This is done by being pressed against the catchers 59a and 59b by the force charged by the springs 60 and 61.

<Problems to be Solved by the Invention> The above-mentioned loading device has a spring 60 when catching.
．． 61, an excessive load is placed on the loading motor 56, making it necessary to use a large and expensive motor.

The present invention eliminates the drawbacks of conventional loading devices, reduces the load required to drive the guide post unit during loading, makes the drive source smaller and lighter, and enables reliable catching of the guide post unit. It is an object of the present invention to provide a record carrier loading device.

Means for Solving the Problems> To achieve this purpose, the present invention includes first and second guide post units provided with guides for guiding the record carrier, and the first and second guide post units are provided with guides for guiding the record carrier. In an apparatus for loading a record carrier into a predetermined position by respectively moving the second guide post units in the circumferential direction and catching both units at different positions, the first guide post unit is moved. Accordingly, the second guide post unit is pressed against the catching member by a pressing member that is displaced according to a cam provided on a rotating member that rotates.

<Operation> In the above-described configuration, there is no need to rotate the rotating member against the pressing force of the pressing member against the catching member, and it is only necessary to displace the pressing member according to the cam, so that the rotation of the rotating member is not required. Since a large driving force is not required, the driving source can be made smaller and lighter, and the pressing force can be increased, it is possible to firmly catch the second kite post unit.

<Embodiment> The structure and operation of an embodiment of the record carrier loading device of the present invention will be described below with reference to FIGS. 1 to 3.

FIGS. 1(A), (B), (C), and (D) are diagrams showing the main part configuration of a loading device according to an embodiment of the present invention, and FIG. Condition, Figure 1 (
B), (C) are in the middle of loading, Figure 1 (D)
indicate the status at the end of loading.

In these figures 1 follows the loading ring 1 . Reference numeral 6 denotes driven rings, which are arranged one on top of the other as shown. 10 is a first guide post unit, 20 is a second guide post unit, and 30 is a first guide post unit.
A first catching structure 40 is for catching the guide post unit, and 40 is a second catching structure for catching the second guide post unit.

A protrusion 2 formed on a base (not shown) attached to the loading ring l is engaged with a hole 11 formed in the first guide post unit lO. Also, the first
The guide post unit 10 is coupled to a loading ring by a spring 49 and biased in the direction of arrow A in FIG. 1(A). Further, in the unit 10, the sleeve 48 of the loading ring 1 is used as a guide rail, and the legs 10a and 10b are in contact with the sleeve 48. This allows the unit 10 to move in the rotational direction of the tenth deng ring 1 while maintaining a fixed relationship with the tenth deng ring 1.

Furthermore, it is also movable relative to the loading ring 1 in the direction of the front and back of the paper plane, which is orthogonal to this rotating direction. A guide 12j3 is installed in the first guide post unit 10 to guide a recording carrier (for example, a magnetic tape).

The second guide post unit 20 has an arm 20a attached to a base 66 attached to a driven ring 6 so as to be rotatable about a shaft 22, and an arm 20b that rotates about a support 20c relative to the arm 20a. The arm 20b is movably mounted and has guides 23 and 24 installed therein to guide the record carrier.

Further, a hook 27 (see FIG. 2), which will be described later, is attached by fitting onto the shaft 22. Also, both ends of the torsion coil spring (not shown) are connected to the side surface 2 of the arm 20a, respectively.
0d and the spring hanging part 27b of the hook 27, and is hung around the shaft 22, and the arm 20a is fixed to the spring hanging part 27b of the hook 27.
It is biased in the direction B in the figure (B).

The hook 27 has elasticity, and has, for example, a shape shown in FIG. 2 (FIG. 2 (A) is an enlarged plan view and FIG. 2(B) is a partial side view of FIG. 2(A)). 27c is a rectangular hole, and an abutting piece 27d is bent at one end thereof.

The protrusion 3 bent from the loading ring 1 engages with the rectangular hole 27c. That is, when the loading ring l rotates, the rectangular hole 2 remains until the second guide post unit 20 is caught by means described later.
7c and the protrusion 3 are in an engaged state, and the second guide boss unit 20 and the driven ring 6 are rotated along with the loading ring 1.

The first catching assembly 30 is disposed in fixed relation to the main body of the device.

A second catching assembly 40 is disposed in fixed relation to the apparatus body and includes a cam 41 . Catcher 42 and guide 43
, 44.

The cam 41 is rotatably attached to a shaft 45, biased by a torsion coil spring 47 in the direction indicated by C in FIG. 1(A), and brought into contact with the sleeve 48 of the loading ring l. A cam 46 is coupled to the loading ring 1, and as the loading ring rotates, the cam surface 46a comes into contact with the cam surface 41c of the cam 41, causing the cam 4
1 in the direction of the third figure. Also, the cam surface 41. a
, 41b together with the guides 43 and 44 move the second guide post unit 20 to the catcher 42 as the second guide post unit 20 rotates.
lead to. The second guide post unit l-20b comes into contact with the key 9 gear 42 and catches the second guide post unit 21b.

In the unloading state shown in FIG. 1(A), when a motor (not shown) is switched on for loading the recording medium, the rotation of the motor is controlled by means such as a known gear train. Gear part 1 of loading ring 1
a, and the ring 1 rotates in the direction of arrow A together with the first guide post unit 10. At this time, the second guide post unit 20 and the driven ring 6 are also connected to the loading ring 1 due to the engagement between the protrusion 3 bent up from the loading ring 20 and the rectangular hole 27c of the hook 27 in the second guide post unit 20. It is taken along and rotated in the entry direction.

As the above rotation progresses and the cam 46 connected to the loading ring 1 comes into contact with the cam 41 as shown in FIG. 1(B), the cam 41 is rotated in the direction of the arrow by the cam surface 46a. The cam surface 41a opens and the second guide roller unit 21 is placed in a state where it can be guided.

Furthermore, as the rotation of the loading ring l progresses, the cam 41 falls onto the cam surface 46b as shown in FIG. 20b is catcher 42
He is called to the side and tentatively makes a catch. At the same time, the hook 27 in the second guide post unit 20
The upwardly inclined portion 27e (see FIG. 3(A)) at the tip of the guide 44 rises along the downwardly inclined portion 44d of the guide 44 due to its elasticity and rides on the flat portion 44e (see FIG. 3(B)). , the hook 27 is disengaged from the protrusion 3 of the loading ring 1, and only the loading ring 1 continues to rotate in the direction of arrow A.

The loading ring l continues to rotate further as shown in Figure 1 (D
) When the first guide post unit 10 reaches the position of the first catching structure 30, the first guide post unit 10 comes into contact with the first catching structure 30,
be caught. The loading ring 1 continues to rotate until the protrusion 2 comes out of the hole 11, and the spring 4
9 is further stored to generate a pressing force in the direction shown in E in FIG. 1(D), and the first guide post unit 10 is reliably caught by this force. Further, the second kite post unit 20 has a projection 1b of the loading ring 1.
When it comes into contact with the protrusion 6a of the driven ring 6 and rotates, it is further pressed against the push-in catcher 42. Thereafter, the cam 41 is rotated by the cam 46 in the direction of the arrow F shown in FIG. 1(D), and the second guide post unit 20 is urged in the direction of the arrow G by the spring 47, thereby firmly catching it.

In such a configuration, the hook 2 may be damaged due to some external force such as an abnormally large tension being applied to the tape during loading as shown in FIG. 1(b).
7 and the protrusion 3 are disengaged, the second guide post unit 20 will be left behind. However, in the second guide post unit 20 that was left behind, as the loading progresses further, the projection 6a of the driven ring 6 comes into contact with the projection tb of the loading ring 1, so that the driven ring 6 rotates.

The second guide post unit 2 is brought into contact with the projection 1b of the loading ring 1 and the projection 6a of the driven ring 6.
0 approaches the cam 41, the cam 41 moves toward the cam surface 4 mentioned above.
6b, and the cam 41 is in the half-open state shown in FIG. 1(c) (usually the above-mentioned temporary catching state). Therefore, in this case as well, the second guide post unit 20 is guided to the second catching structure 40.

During unloading, the loading motor rotates in the opposite direction to that during loading, and the loading ring 1 also rotates in the opposite direction.

Then, the protrusion 3 of the loading ring 1 is connected to the hook 27.
When the hook 2 comes into contact with the contact piece 27d and presses it, the hook 2
7 returns to the original position shown in FIG. 3(A) due to its elasticity, the protrusion 3 engages with the rectangular hole 27c of the hook, and the driven ring 6 and the second guide post unit 20 return to the loading ring 1. Figure 1 (A)
The state shown in is restored.

The tape loading device according to the embodiment of the present invention as described above has a structure in which the second guide post unit 20 is pressed against the catcher 42 by the cam 41 rotated by the cam 46 provided on the loading ring l. , the pressing force against the catcher 42 is obtained by a spring 47. Even if the biasing force of the spring 47 is made sufficiently large, the driving load on the loading ring 1 and the driven ring 6 will not be large enough. Therefore, compared to the conventional tape loading device as shown in FIG. 5, the loading motor is made smaller. It is possible to make it lighter and lighter.

<Effects of the Invention> As explained above, according to the record carrier loading device of the present invention, the drive source of the guide post unit can be made smaller and lighter, and the guide post unit can be caught reliably.

[Brief explanation of the drawing]

FIGS. 1(A), (B), (C), and (D) are diagrams showing the main part configuration of a loading device according to an embodiment of the present invention, and FIG.
A) and (B) are parts diagrams of the hook in Figure 1, Figures 3 (A) and (B) are diagrams showing the engagement relationship between the hook and the loading ring in Figure 1, and Figure 4 is a diagram showing the engagement relationship between the hook and the loading ring in Figure 1. The figure shows the conventional V
FIG. 5 is a diagram showing a tape running system of a TR, and FIG. 5 is a diagram showing a conventional loading device. 1・・・・・・・・・・・・・・・Loading ring between songs, death・・・・・・・・・・・・・・・Kaimei・
・Song・Driven ring, 10・・・・・・・・・・Song・・
・First guide post unit between curved surfaces, 20...
・・・・・・Between songs・Songs・Listen・Second guide post unit, 30・・・・・・・・・・・・・・・・Inside songs・・
・1st catching structure between songs, 40... Between songs, 21st catching structure between songs, 41...
...Cam as a curved curved pressure member, 46...
・・・・・・・・・・・・Song・Song・Cam, 47
・・・・・・・・・・・・・・・Curved surface...Curved wings.

Claims (1)

[Claims] The apparatus comprises first and second guide post units provided with guides for guiding the record carrier, and the first and second guide post units are moved in the circumferential direction, respectively, and both units are caught at different positions from each other. The device loads the record carrier at a predetermined position by loading the second guide post unit by a pressing member that is displaced according to a cam provided on a rotating member that rotates to move the first guide post unit. A record carrier loading device characterized in that a guide post unit is pressed against a catching member.