JP3168082B2 - Tape loading mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video tape recorder (hereinafter referred to as "VTR") for recording / reproducing by winding a recording tape around a rotating drum having a head at a predetermined angle.
And a tape loading mechanism.

[0002]

2. Description of the Related Art Conventionally, a tape loading mechanism of a VTR has a guide base 1 having a guide post 2 for pulling out a recording tape, as shown schematically in a side view of a main part of FIG. A guide member 5 having a cylindrical positioning pin 7 at which a guide groove and a guide base 1 making contact with each other come into contact with each other and stopping, and a drive arm for moving the guide base are provided. The tape is wound at a predetermined angle.

In order to guide the guide base 1 by the guide groove of the guide member 5, a protrusion 3 protruding from the lower surface of the guide base 1 is inserted into the guide groove so as to be slidable, and protrudes from the back surface of the guide groove. The guide base 1 is prevented from falling out of the guide groove of the guide member 5 by the flange portion 4 having a diameter larger than the width of the guide groove formed at the tip of the convex portion 3.

The guide base 1 that moves along the guide groove while pulling out the tape from the cassette has a V-shaped recess provided on one surface of the guide base 1 against a positioning pin 7 provided on the guide member 5. The guide base 1 stops at a predetermined position by contacting and stopping, and the other portion of the guide base 1 comes into contact with a positioning member provided on the guide member to prevent the guide base 1 from rotating, so that the tape can be loaded onto the drum. It can be completed.

FIG. 8 is a side view of a main part showing a state where the guide base 1 is stopped at the loading position.

In the conventional parallel loading (M-loading) configuration, the guide member 5 is mounted parallel to the surface of the chassis 15 and the positioning pin 7 is perpendicular to the surface of the guide member 5, unlike FIG. It was formed in a cylindrical shape.

[0007]

However, in order to insert the guide base 1 into the guide groove of the guide member 5 and move the guide base 1, the guide member 5 needs two or more members so as to cut the guide groove. A manufacturing method is adopted in which a guide base 1 is inserted into a guide groove of one of the members at the time of assembling and then bonded to and integrated with the other member.

[0008] Therefore, the assembling process is troublesome and the manufacturing cost is increased. In addition, it is inevitable that a step is formed in the guide groove at the portion where the two members are joined, and there is a problem that the smooth movement of the guide base 1 is hindered.

Further, with the recent miniaturization of the VTR, the diameter of the drum has been reduced, and the angle at which the tape is wound around the drum tends to increase.

As a result, the guide member 5 is attached at an angle to the chassis 15 as shown in FIG. 8, and the positioning pins 7 have a shape inclined to the chassis surface. In order to integrally form by mass-forming for mass production, simply dividing the mold into upper and lower portions causes the one side of the positioning pin 7 inclined with respect to the surface of the chassis 15 to be undercut and cannot be released from the mold. There is a problem that the mold requires a slide mechanism or the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and provides a tape loading mechanism that can smoothly move a guide base and stop at a predetermined position without increasing manufacturing costs. The purpose is to do so.

[0012]

For this reason, a tape loading mechanism according to the present invention comprises a guide base having a guide post for pulling out a recording tape, a guide groove forming a moving path of the guide base, and the guide base. contact with a guide member having a positioning member to stop, and a drive arm for moving the gas <br/> Idobesu, a tape loading mechanism for winding a predetermined angle recording tape to the rotating drum has a head, said guide the lower surface of the base and a flange portion protruding to the rear surface of the guide groove has a larger diameter than the width of the convex portion and the guide groove to be inserted into the guide groove formed on the guide member, said guide member the guide base insertion part capable of inserting the guide base of the flange portion outside the movement range of the guide base of the guide groove is provided, the drive With the configuration, characterized in that formed by connecting the arm to the guide base, is intended to achieve the above object.

The guide member is inclined with respect to the chassis surface, and the positioning member has a taper angle greater than the angle at which the guide member is inclined with respect to the chassis surface, and is formed perpendicular to the guide member. An object of the present invention is to achieve the above object by a configuration characterized in that there is a certain feature.

[0014]

[0015]

[0016]

[0017]

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a tape loading mechanism according to the present invention will be described with reference to embodiments.

FIG. 1 is a plan view of a main part showing a guide base inserted into one guide groove of the first embodiment, FIG. 2 is a side view of a main part of the same embodiment, and FIG. 3 is a plan view of a guide member of the same embodiment. FIG. 4
FIG. 5 is a plan view of a main part showing a guide base inserted into the other guide groove.

As shown in FIGS. 1, 2 and 4, a guide post 2 for pulling out a recording tape is provided on a guide base 1.
Is formed on the upper surface, a convex portion 3 to be inserted into the guide groove 6 of the guide member 5 on the lower surface of the guide base 1, and a flange portion 4 having a diameter larger than the width of the guide groove 6 at the tip of the convex portion 3. When the protrusion 3 of the guide member 5 is inserted into the guide groove 6, the flange 4 is located on the back surface of the guide groove 6.

As shown in FIG. 3, the guide member 5 is formed with two curved guide grooves 6 penetrating from the front surface to the back surface, and slides the convex portion 3 of the inserted guide base 1. Can be moved. A positioning pin 7a for stopping the guide base 1 is provided on a peripheral portion of the drum base 8 so that the guide post 2 of the guide base 1 is located at a predetermined position with respect to a drum (not shown) attached to the guide member 5. The recording tape in the tape cassette (not shown) is pulled out by the guide posts 2 of the respective guide bases 1 inserted into the guide grooves 6 provided at two locations, and the recording tape is wound at a predetermined angle around a rotating drum (not shown) having a head. It is configured to be able to be guided.

Each of the guide grooves 6 is extended, and a guide base insertion portion 9 which is widely opened so that the flange portion 4 of the guide base 1 can be inserted from the upper surface or the side surface of the guide member 5.
Is formed so that the flange portion 4 of the guide base 1 can be inserted into the guide base insertion portion 9 and the guide base 1 can be moved to the guide groove 6 portion.

The flange 4 inserted into the guide groove 6
The both sides of the guide groove 6 are continuous by the bottom surface portion 10 at a position deeper than the lower surface of the guide member 5, and the guide member 5 provided with the guide groove 6 at two places is integrally formed.

The drive arm 11 is connected to a projecting shaft on the lower surface of the guide base 1 so that the guide base 1 is
It is configured to move along.

FIG. 5 is an explanatory diagram showing both end positions at which the guide base 1 is moved along the guide groove 6 by the drive arm 11.

The range of movement of the guide base 1 by the drive arm 11 is such that the guide base 1 is guided from the first position P1 where the tape cassette can be loaded, that is, the position near the end of the guide groove 6 following the guide base insertion portion 9. is between until the positioning pins 7 a to complete the tape loading abutting second position P2 of the member 5, further in the present embodiment, the back surface projecting portion of the curved portion 11a guide base insertion portion 9 portion of the drive arm 11 The guide base 1 cannot be removed from the guide member 5 by moving the guide base 1 to the guide base insertion portion 9 due to the contact with the guide member 5.

With the above configuration, the guide groove 6 of the guide member 5
The guide base 1 is inserted into the guide base insertion portion 9 by extending the convex portion of the guide base 1 and the flange portion 4 from the upper surface or the side surface of the guide member into the guide groove 6. The projecting portion 3 of the inserted guide base 1 can be inserted and mounted in the guide groove 6, and does not fall out of the guide groove 6 by the flange portion 4 having a diameter larger than the width of the guide groove 6, and the connected drive arm 11 is connected.
Is moved along the guide groove 6 by the positioning pin 7
The recording tape can be loaded by stopping at a predetermined position by contacting the recording tape with the recording tape.

Note that the range of reciprocating movement of the guide base 1 by the drive arm 11 is only between the guide grooves 6, so that the movement to the guide base insertion portion 9 is not performed, or the shape of the drive arm 11 must be selected. By guide base 1
Does not deviate from the guide groove 6 when used in connection with the drive arm 11. And the drive arm 11
By removing the guide base 1, the guide base 1 can be moved to the guide base insertion portion 9 and removed from the guide member 5.

In addition, the guide member 5 is divided and manufactured once, and the guide base is inserted, and then bonded and integrated, so that the conventional complicated process is not required, and the guide member 5 is connected at the bottom portion 10 of the guide base insertion portion 9. Since the shape can be integrally formed from the beginning, the guide groove 6 has no joint, and the guide base 1 can move smoothly along the guide groove 6 of the guide member 5. And mass production is easy and cost reduction is possible.

(Other Embodiment) FIG. 6 is a side view of a main part of the second embodiment, and FIG. 7 is a plan view of the main part. As shown by an arrow A in FIG. FIG.

In the second embodiment, the guide member 5 is
5 is inclined by an angle θ. The positioning pin 7a for stopping the guide base 1 at the second position P2 has a taper angle α equal to or slightly larger than the angle θ at which the guide member 5 is inclined with respect to the chassis 15 surface. Are formed with the center line vertical. Other configurations are the same as those in the above-described embodiment, and thus redundant description will be omitted.

With the above configuration, the positioning pin 7a has a taper angle α equal to or larger than the angle θ at which the guide member 5 is inclined with respect to the surface of the chassis 15, and is formed perpendicular to the guide member 5. There is no possibility that the positioning pin 7a is in an undercut state and cannot be released from the mold that is released upward with respect to the chassis surface, and the guide member 5 having the positioning pin 7a and the chassis 15 are integrally molded. This is convenient for mass production and cost reduction is possible.

In the second embodiment, the guide base 1
Pin 7 for stopping the motor at the second position P2
In this embodiment, a is formed such that the guide member 5 has a taper angle α that is equal to or slightly larger than the angle θ at which the guide member 5 is inclined with respect to the surface of the chassis 15 and the center line is perpendicular to the guide member 5. , Positioning pin 7 for guide base 1
In addition to the positioning pin 7a, in addition to the positioning pin 7a, the guide member 5 is provided with a chassis 15 as shown in FIG. Has a taper angle α equal to or greater than the angle θ inclined to the surface,
By forming the guide member 5 perpendicularly to the guide member 5, the positioning pin 7a does not become undercut and cannot be released from the mold that is released upward with respect to the chassis surface. And the chassis 15 can be easily molded integrally, and the assembly is easy, which is convenient for mass production and can reduce the cost.

As described above, according to the present invention,
The projection and the flange on the lower surface of the guide base are inserted outside the moving range of the guide base in the guide groove of the guide member, and are shifted to the guide groove.
Without any way influence can be easily inserted and mounted a guide base in the guide groove of the guide member, assembled
Work efficiency can be improved .

The reciprocating movement of the guide base by the drive arm is only between the guide groove portions. The reciprocation to the guide base insertion portion is not performed, or the guide base is formed by selecting the shape of the drive arm. When connected to the drive arm and used, it does not fall out of the guide groove. Then, by removing the drive arm, the guide base can be moved to the guide base insertion portion and removed from the guide member.

Also, unlike the related art, the guide member is divided and manufactured once, does not require a troublesome process of inserting the guide base, and then bonding, and is integrally formed from the beginning as a shape connected at the bottom surface of the guide base insertion portion. Since it can be manufactured, it can be easily assembled, and furthermore, there is no seam in the guide groove, and the guide base can move smoothly along the guide groove of the guide member. And mass production is easy and cost reduction is possible.

In the configuration in which the guide member is inclined with respect to the chassis surface, the positioning member has a taper angle greater than the angle at which the guide member is inclined with respect to the chassis surface, and is formed perpendicular to the guide member. Accordingly, the positioning member does not become undercut and cannot be released from the mold that is released upward with respect to the chassis surface, and the guide member having the positioning member and the chassis are integrally molded. Can be easily performed, which is convenient for mass production, and cost reduction is possible.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of one embodiment.

FIG. 2 is a side view of a main part of one embodiment.

FIG. 3 is a plan view of a guide member according to one embodiment.

FIG. 4 is a plan view of a main part of one embodiment.

FIG. 5 is an explanatory diagram showing both end positions at which a guide base moves.

FIG. 6 is a side view of a main part of the second embodiment.

FIG. 7 is a plan view of a main part of a second embodiment.

FIG. 8 is a side view of a main part of a conventional tape loading mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide base 2 Guide post 3 Convex part of lower surface of guide base 4 Flange part of lower surface of guide base 5 Guide member 6 Guide groove 7, 7a Positioning pin 8 Drum base 9 Guide base insertion part 10 Bottom part of guide base insertion part 11 Drive Arm 11a Curved portion of drive arm 15 Chassis 16, 16a Drum positioning pin α Taper angle of positioning pin θ Angle of inclination of guide member with respect to chassis

Claims (3)

(57) [Claims] 1. A guide base having a guide post to pull out the recording tape, a guide member having a positioning member, wherein the guide grooves guide base constituting a moving path of the guide base is stopped in contact, said guide base and a driving arm which moved, a tape loading mechanism for winding a predetermined angle recording tape to the rotating drum has a head, the draft on the lower surface of the guide base
And a flange portion protruding to the rear surface of the guide groove has a larger diameter than the width of the convex portion and the guide groove to be inserted into the guide grooves formed in the inner member, said guide groove of said guide member
A tape loading mechanism, comprising: a guide base insertion portion into which a flange portion of the guide base can be inserted outside a moving range of the guide base; and the drive arm connected to the guide base. 2. A guide base having a guide post for pulling out a recording tape, a guide member having a guide groove forming a moving path of the guide base and a positioning pin for stopping by contacting the guide base, and the guide base. A drive arm for moving, a tape loading mechanism for winding a recording tape around a rotating drum having a head at a predetermined angle, wherein the guide member is inclined with respect to a chassis surface, and the positioning pin is attached to the guide member. The guide member is formed in a tapered shape so as to have a large diameter, the guide member has a taper angle equal to or greater than an angle inclined with respect to the chassis surface, and is formed perpendicular to the guide member. A tape loading mechanism. 3. A head having a guide base having a guide post for pulling out a recording tape, a guide member having a guide groove forming a moving path of the guide base and a positioning pin for determining a position of a drum, and having a head. the recording tape on the rotating drum a predetermined angle wrapping tape loading mechanism, the guide member is inclined relative to the chassis surface, the positioning pin is tapered to the side attached to the guide member is large Formed,
A tape loading mechanism, wherein the guide member has a taper angle equal to or greater than an angle inclined with respect to the chassis surface, and is formed perpendicular to the guide member.