JPH0737303A - Positioning member of guide post for video-tape recorder - Google Patents

Abstract

PURPOSE:To obtain a positioning member capable of positioning and stopping a guide post with high accuracy by controlling the position in the axial direction of the guide post with guide plate and a spring plate and controlling an inclination with an engaging recessed section. CONSTITUTION:The guide post 1 is moved while shaft sections at both ends are held by a guide arm 9. When the guide post 1 is brought near a specified position, one shaft end section is abutted against a guide plate 12 installed to a guide-post positioning member 10 first, the other shaft end section is abutted against a spring plate 15 and pushed in the direction of the guide plate 12, and the axial direction is controlled by the guide plate 12. One shaft section of the guide post 1 is abutted against an engaging recessed section 13 formed on the positioning member 10 and the other shaft section against an engaging recessed section 14, thus stopping the movement of the guide post 1. By the constitution, the guide post 1 can be positioned and stopped with high accuracy, and a recording tape can be wound on a drum at a specified correct location at a fixed inclination in a VTR. It is favorable that the guide plate 12 has a positioning mechanism 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a video tape recorder (hereinafter referred to as VTR), and a guide post for pulling out and moving a tape-shaped recording medium stored in a cassette is stopped at a predetermined loading completion position for recording. The present invention relates to a guide post positioning member for a video tape recorder that brings a medium into contact with a drum for recording or reproduction.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view showing a structure of a guide post positioning member provided in a conventional VTR.

1 is a guide post, 2 is a height adjusting screw, 3
Is a guide base, 4 is a positioning pin, 5 is a positioning guide member, 6 is a first receiving portion provided on the positioning guide member 5,
Reference numeral 7 is a second receiving portion formed on the positioning pin 4.

The guide post 1 has a shaft portion fitted into a hole formed in the guide base 3 and is fixed and held substantially perpendicularly to the guide base 3. The guide base 1 guides the recording tape while pulling out the recording tape. 3 is a positioning guide member 5
Of the positioning guide member 5 and the second receiving portion 7 formed on the positioning pin 4 when it moves to the loading completion position by being guided by the guide groove of the positioning pin 4.
The guide base 3 comes into contact with and stops.

The adjusting screw 2 formed on the shaft portion of the guide post 1 is screwed into the female screw of the hole formed in the guide base 3 so that the height of the guide post 1 in the thrust direction can be adjusted. Has become.

[0006]

However, in the structure of the guide post positioning member of the above-mentioned conventional VTR, the mounting accuracy of the positioning pin 4 to the positioning guide member 5 and the first receiving portion 6 provided in the positioning guide member 5 are large. And the accuracy of the second receiving portion 7 formed on the positioning pin 4, the guide base 3 that abuts against the first receiving portion 6 and the second receiving portion 7.
Of the contact surface of the guide post 3 and the guide base 3
It is necessary to sufficiently improve and maintain the accuracy of the hole for fixing the. However, there are problems that the accuracy of machining parts is limited and the cost is increased.

In the guide post 1, the inclination error of the hole of the guide base 3, the first receiving portion 6 provided on the positioning guide member 5, and the second receiving portion 7 formed on the positioning pin 4 are provided. There is also a problem that an error or the like of the relative dimension h overlaps with each other and a slight error and a hindrance occur in an inclination angle for guiding the recording tape to the drum.

The present invention has been made in order to solve the above-mentioned problems of the prior art. Positioning of a guide post of a VTR capable of stopping the guide post at a predetermined loading completion position and at a predetermined inclination angle. It is intended to provide a member.

[0009]

Therefore, the guide post positioning member of the video tape recorder according to the present invention is
A guide post positioning member for a video tape recorder that stops a guide post that pulls out and moves a tape-shaped recording medium housed in a cassette to bring the recording medium into contact with a drum for recording or reproduction. The shaft portion is held by the guide arm and comes into contact with one shaft end of the moving guide post to regulate the axial position, and the guide plate comes into contact with the other shaft end of the moving guide post to come into contact with the guide plate. The spring plate that presses in the direction of the guide plate, the first engagement recess that abuts on one shaft of the moving guide post to stop the movement, and the first engagement recess that abuts on the other shaft of the moving guide post. The second object is to achieve the above-mentioned object by a configuration characterized in that it has a second engagement recess for stopping the movement.

[0010]

With the above construction, when the guide posts are moved by being held by the guide arms at the shaft portions at both ends and approach a predetermined position, one of the shaft ends first comes into contact with the guide plate provided on the guide post positioning member and the other. The shaft end portion of the shaft contacts the spring plate and is pressed in the guide plate direction, and the axial (thrust direction) position is regulated by the guide plate. Then, one shaft portion of the guide post abuts on the first engagement recessed portion provided on the guide post positioning member, and the other shaft portion abuts on the second engagement recessed portion provided on the guide post positioning member to stop the movement. To do.

As described above, the stop position and the inclination of the guide post at the time of stop are restricted only by the guide post positioning member, and the guide post can be positioned and stopped with high precision.

[0012]

EXAMPLES A guide post positioning member for a video tape recorder according to the present invention will be described below with reference to examples.

FIG. 1 is a perspective view of one embodiment, and FIG. 2 is a sectional view of the same embodiment. FIG. 1 shows a state in which a guide post is approaching a guide post positioning member, and FIG. The state where it abuts on the member and is stopped is shown.

The configuration and function of this embodiment will be described together with reference to FIGS.

Reference numeral 1 is a guide post, 9 is a guide arm that holds both end shaft portions of the guide post 1 and moves from an unloading position to a loading position, and 10 is a guide post positioning member that determines a stop position of the guide post 1. .

Reference numeral 11 is an adjustment screw for adjusting the stop position of the guide post 1 in the axial direction (thrust direction), and reference numeral 12 is an axial direction in which the adjustment screw 11 abuts and presses against the upper shaft end portion of the guide post 1. A guide plate 13 for restricting the position, 13 is a V-shaped first engaging recess for abutting on the upper shaft portion of the guide post 1 to stop the movement, and 14 is abutting on the lower shaft portion of the guide post 1 for stopping the movement. The V-shaped second engaging concave portion 15 is a spring plate that abuts the lower shaft end of the moving guide post 1 and presses the guide post 1 toward the guide plate 12.

FIG. 3 is an explanatory view of the tape loading mechanism of the VTR having the above embodiment.

Reference numeral 16 is a drum for recording or reproducing a signal by a head for winding a recording tape at a predetermined angle, 17 is a loading motor, and 18 is a loading motor 17
The first gear, which is integrally formed with the shaft of the first slide plate, 19 is the first slide plate that is slidably supported,
Reference numeral a is a shaft which is a rotation center of the guide arms 9, 9a, and 21 is a sliding force of the first slide plate 19, which is the second slide plate 2.
8 is the second gear, and 22 is the second slide plate 28.
And a third gear 25a that engages with a gear 25a formed on the base of the drawer arm 23a.
Gears formed on the base of 3; 26, cassette containing magnetic recording tape; 27, 27a, guide arms 9, 9a
It is a gear formed at the base of the.

The operation of this embodiment will be described below.

At the time of loading, the motor 17 rotates in the direction of arrow a. Then, the rotation of the first gear 18 causes the first slide plate 19 to move in the direction of the arrow. First
The movement of the slide plate 19 causes the first slide plate 19 to move.
The guide arms 9 and 9a in which the base teeth 27 and 27a are engaged with the rack teeth formed on the base are rotated, and the guide posts 1 and 1a held by the guide arms 9 and 9a are moved to the guide post positioning member. It contacts 10, 10a.

At the same time, the movement of the first slide plate 19 is transmitted to the second slide plate 28 via the gear 21 and the rack teeth rotate the arms 23, 23a to move the tips 24,
The magnetic recording tape in the cassette 26 is pulled out by 24a, wound around the drum 16 at a predetermined angle, and the loading is completed.

Upon completion of the above-mentioned loading, the guide posts 1 and 1a have one shaft portion of the first engagement concave portion 1 due to the configuration of the guide post positioning members 10 and 10a.
3, the other shaft portion is brought into contact with the second engaging recessed portion 14 to determine the position in the horizontal direction (radial direction of the shaft) and the inclination angle as predetermined, and the lower shaft end portion of the guide post 1, 1a is The upper shaft end portions of the guide posts 1 and 1a come into contact with the guide plate 12 which is pressed against the spring plate 15 in the direction of the guide plate 12 and whose position is adjusted by the adjusting screw 11, and the vertical direction (the thrust direction of the shaft). The position of is determined as predetermined. The position in the vertical direction (axial thrust direction) can be adjusted by the adjusting screw 11.

The spring plate 15 may be formed integrally with the guide post positioning members 10 and 10a or the guide arms 9 and 9a, and the same effect as described above can be obtained.

Further, in the present embodiment, the guide post positioning members 10 and 10a are configured to abut the shaft portions of the guide posts 1 and 1a.
It is also possible to adopt a configuration in which it comes into contact with the flange portion configured in.

[0025]

As described above, according to the present invention,
When the guide posts move with the shaft portions on both ends held by the guide arms and approach a predetermined position, first one shaft end portion contacts the guide plate provided on the guide post positioning member and the other shaft end portion becomes the spring plate. It abuts and is pressed in the direction of the guide plate, and the axial (thrust direction) position is regulated by the guide plate. Then, one shaft portion of the guide post abuts on the first engagement recessed portion provided on the guide post positioning member, and the other shaft portion abuts on the second engagement recessed portion provided on the guide post positioning member to stop the movement. To do.

As described above, the guide post can stop and position the guide post with high precision by restricting the stop position and the inclination at the time of stop only by the guide post positioning member, and the video tape recorder can record the recording tape on the drum. By winding at a predetermined correct position and inclination angle, excellent recording / reproducing function can be exhibited, and cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment.

FIG. 2 is a sectional view of an example.

FIG. 3 is an explanatory diagram of a tape loading mechanism of a VTR equipped with an embodiment.

FIG. 4 is a sectional view of a conventional guide post positioning member.

[Description of Reference Signs] 1 guide post 9 guide arm 10 guide post positioning member 11 adjustment screw 12 guide plate that regulates the axial position of the guide post 13 first engaging recess 14 that stops the movement of the guide post 14 movement of the guide post Second engaging recess for stopping the spring 15 Spring plate for pressing the guide post toward the guide plate

Claims (2)

[Claims] 1. A guide post positioning member for a video tape recorder for stopping a tape-shaped recording medium housed in a cassette and moving the guide post at a predetermined position to bring the recording medium into contact with a drum for recording or reproduction. There is a guide plate that holds the shaft parts at both ends in contact with one shaft end of the moving guide post and regulates the axial position, and the other shaft end of the moving guide post. A spring plate that abuts against the guide plate in the direction of the guide plate, a first engagement recess that abuts on one shaft of the moving guide post to stop the movement, and the other of the moving guide post A guide post positioning member for a video tape recorder, comprising: a second engaging concave portion that comes into contact with the shaft portion and stops moving. 2. The guide post positioning of a video tape recorder according to claim 1, wherein the guide plate has an adjusting mechanism for adjusting the position of the surface of the guide post that abuts the shaft end of the guide post in the axial direction of the guide post. Element.