JPH0629804Y2 - Loading mechanism - Google Patents

Description

The present invention relates to a tape loading mechanism used in a rotary drum type magnetic recording / reproducing apparatus (hereinafter referred to as recording / reproducing apparatus).

2. Description of the Related Art A of an example of a conventional loading mechanism is shown in FIGS.

In the figure, the tape 4 is pulled out from the tape cassette 6, and a vertical pole 7 and an inclined pole 8 for contacting the rotating drum 5 and an erasing head (not shown) are planted on the lower surface of the pole base (transfer member) 1. Has first and second guide pins (first and second guided members) 1a and 1b implanted therein. Further, on the lower surface of the pole base 1, a guide rail groove (guide portion) described later branched into a substantially Y shape is formed.
A guide groove 1c is engraved in parallel with the first guide rail groove 2a (one guide portion) 2a of the second guide rail 1a. A bent portion 1d that is bent in a direction opposite to the second guide rail groove (the other guide portion) 2b of the rail groove 2 is formed.

First and second positions for positioning the pole base 1 at the loading position of the tape 4 (position shown in FIG. 5) by guiding and positioning the first and second guide pins 1a and 1b. The guide rail groove 2 having the guide rail grooves 2a and 2b is formed in the substrate 18, and the first and second guide rail grooves 2 of the substrate 18 are formed.
The pole base 1 is provided near the branch point 2c of a and 2b.
Of the pole base 1 fitted in the guide groove 1c of
Pins 3 for guiding and positioning the guide pin 1a in the first guide rail groove 2a and the second guide pin 1b in the second guide rail groove 2b are implanted.

In the conventional loading mechanism A having the above configuration,
When the pole base 1 is moved and driven in the pulling-out direction of the tape 4 by a drive mechanism (not shown) and the first guide pin 1a of the pole base 1 reaches the vicinity of the branch point 2c of the guide rail groove 2, the guide groove of the pole base 1 is guided. The pin 3 is fitted into 1c. Further, when the pole base 1 is moved and driven in the pulling-out direction of the tape 4, the pole base 1 is guided by the pin 3, and the first guide pin 1a is guided to the first guide rail groove 2a of the guide rail groove 2. . And
At the same time when the second guide pin 1b of the pole base 1 reaches the branch point 2c, the pin 3 is moved to the bent portion 1d of the guide groove 1c.
And the pole base 1 is driven to move in the pulling-out direction of the tape 4,
Swings in the direction of arrow 11 about the first guide pin 1a, and the second guide pin 1b moves in the guide rail groove 2
Is guided to the second guide rail groove 2b.

As a result, the first guide pin 1a moves into the first guide rail groove 2
The second guide pin 1b is positioned at the tip of the a, respectively, at the tip of the second guide rail groove 2b, and the pole base 1 is positioned at the loading position of the tape 4.

However, in the loading mechanism A, in order to provide the guide groove 1c which constitutes a mechanism for positioning the pole base 1 at the loading position of the tape 4, the pole mechanism 1 is pulled out in the pulling direction of the tape 4. Against
It must be formed in a laterally projecting shape, and a wide space for passing the pole base 1 is required in the passage path of the pole base 1 along the guide rail groove 2.

This has been one of the obstacles to the miniaturization of the entire loading mechanism.

DISCLOSURE OF THE INVENTION The present invention was devised in view of the above circumstances, and by changing the mechanism for positioning a transfer member having a vertical pole for pulling out a tape and an inclined pole to a tape loading position, a mechanism is provided. The purpose of the present invention is to provide a loading mechanism that can be downsized.

In order to achieve the above-mentioned object, the main means adopted by the present invention is, as its gist, a vertical pole and an inclined pole for pulling a tape out of a tape cassette and bringing it into contact with a rotating drum and an erasing head. And a transfer member having first and second guided members, and by guiding and positioning the first and second guided members, the transfer member is positioned at the tape loading position. A loading mechanism having a guide portion branched into a substantially Y shape for positioning the head to the rotary drum, and a biasing means arranged to face the rotary drum and biasing the erasing head toward the rotary drum. In the above, the first guided member is moved by engaging the urging means with the transfer member and urging the transfer member in a predetermined direction by the urging means. Engagement portion for guiding and positioning the one substantially Y-shaped guide portion as the feeding member moves and guiding and positioning the second guided member to the other substantially Y-shaped guide portion. It is a loading mechanism according to the point that is provided.

In the loading mechanism configured as described above, the first guided member is moved along with the movement of the transfer member by urging the engaging portion provided on the transfer member in the predetermined direction by the urging means. The guide is positioned by being guided by one of the substantially Y-shaped guide portions, and then the second guided member is reversed Y-shaped.
Since the movable member is guided and positioned by the other guide portion having a character shape, it is not necessary for the moving member to have a shape projecting laterally with respect to the tape withdrawing direction.

Embodiments Hereinafter, embodiments embodying the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

It should be noted that the following embodiments are examples of embodying the present invention and are not of the nature to limit the technical scope of the present invention.

Here, FIG. 1 is a plan view of a main part of a recording / reproducing apparatus having a loading mechanism according to an embodiment of the present invention, and FIG. 2 is a first guided member of a transfer member constituting the loading mechanism having a substantially Y shape. FIG. 3 is a plan view showing a state of being guided by one of the guide portions of FIG. 3, FIG. 3 is a side view taken along the arrow C in FIG. 2, and FIG. 4 is a second Y-shaped guide member of the transfer member. It is a top view showing the state guided by the other guide part.

Further, elements common to the conventional loading mechanism A shown in FIGS. 5 and 6 will be described using the same reference numerals.

In the loading mechanism B according to this embodiment, as shown in FIGS. 1, 2, and 3, the pole base (transfer member) is used.
A vertical pole 7 and an inclined pole 8 for pulling out the tape 4 from the tape cassette 6 and contacting the rotary drum 5 and the erasing head 13 are arranged in parallel on the upper surface of the inclined pole 8. An engaging portion 17 that engages with a sliding contact surface 14a of an arm 14 described later is formed. A first guide pin (first guided member) 1a is planted on the lower surface of the pole base 1 coaxially with the vertical pole 7, and the lower surface of the pole base 1 further includes the first guide pin 1a. A second guide pin (second guided member) 1b is planted on the upstream side of the tape 4 in the drawing direction (arrow 9) and on the downstream side of the engaging portion 17.

By guiding and positioning the first and second guide pins 1a and 1b respectively, the pole base 1 is branched into a substantially Y shape for positioning at the loading position of the tape 4 (position shown in FIG. 1). Guide rail groove (guide portion) having a first guide rail groove (one guide portion) 2a and a second guide rail groove (other guide portion) 2b
The reference numeral 2 is formed in the substrate 18, and the erasing is provided at a position near the branch point 2c of the first and second guide rail grooves 2a and 2b on the substrate 18 and facing the rotary drum 5. An arm 14 that supports the head 13 is pivotally mounted on a shaft 15 so as to be swingable.

The arm 14 is constantly urged by a spring 16 toward the installation side (predetermined direction) of the rotary drum 5.

In this case, the arm 14, the shaft 15 and the spring 16 constitute a biasing means D.

On the side surface of the arm 14 on the side where the rotary drum 5 is installed, a sliding contact surface 14 a that engages with the engaging portion 17 of the pole base 1.
The engaging portion 17 is urged toward the installation side (predetermined direction, arrow 12) of the rotary drum 5 by the arm 14, so that the first guide pin 1a of the pole base 1 is moved to the second guide pin. Counterclockwise around 1b (arrow 10, second
(Refer to the drawing), and along with the movement of the pole base 1, is guided and positioned in the first guide rail groove 2a along the left side wall in the drawing direction of the tape 4 of the guide rail groove 2. . Further, when the second guide pin 1b reaches the branch point 2c of the guide rail groove 2, the pole base 1 is rotated counterclockwise (arrow 1) around the first guide pin 1a.
1, see FIG. 4), and the second guide pin 1b is driven.
Is guided and positioned in the second guide rail groove 2b.

In the loading mechanism B configured as described above, when the pole base 1 is moved and driven in the pulling-out direction of the tape 4 by the driving mechanism (not shown), and the pole base 1 reaches the vicinity of the branch point 2c of the guide rail groove 2, this pole is moved. The engaging portion 17 of the base 1 engages with the sliding contact surface 14a of the arm 14, and the pole base 1 is biased counterclockwise (arrow 12) about the center of the second guide pin 1b. Therefore, even if the first guide pin 1a of the pole base 1 reaches the branch point 2c,
It is accurately guided to the first guide rail groove 2a without accidentally entering the guide rail groove 2b.

On the other hand, when the second guide pin 1b reaches the branch point 2c along with the movement of the pole base 1, the pole base is counterclockwise (the arrow 11, (See FIG. 4), the second guide pin 1b swings counterclockwise around the first guide pin 1a and is guided to the second guide rail groove 2b.

As a result, the first guide pin 1a moves into the first guide rail groove 2
The second guide pin 1b is positioned in the second guide rail groove 2b at a, and the pole base 1 is positioned at the loading position of the tape 4.

Since the loading mechanism B is configured as described above, the mechanism for positioning the pole base 1 at the loading position of the tape 4 is extremely effective at the sliding contact surface 14a of the arm 14 and the engaging portion 17 of the pole base 1. It can be easily achieved.

As described above, according to the present invention, the vertical pole and the inclined pole for drawing the tape out of the tape cassette and contacting the rotating drum and the erasing head are planted. A guide member branched into a substantially Y shape for positioning the transfer member at the tape loading position by guiding and positioning the transfer member having a guide member and the first and second guided members. And a biasing means for biasing the erasing head in the direction of the rotary drum, the loading mechanism having a section and a biasing means facing the rotary drum.
The first guided member is engaged with the urging means and urges the transfer member in a predetermined direction by the urging means to move the first guided member along the movement of the transfer member. And positions the second guided member substantially in the Y direction.
Since the loading mechanism is characterized in that it is provided with an engaging portion for guiding and positioning to the other guide portion of the character shape, the transfer member having the vertical pole for pulling out the tape and the inclined pole is loaded on the tape. The mechanism for positioning to a position can be made extremely compact. As a result, the entire mechanism can be downsized.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part of a recording / reproducing apparatus having a loading mechanism according to an embodiment of the present invention, and FIG. 2 is a first guided member of a transfer member constituting the loading mechanism having a substantially Y shape. FIG. 3 is a plan view showing a state of being guided by one guide portion, FIG. 3 is a side view taken along the arrow C in FIG. 2, and FIG. 4 is the other Y-shaped second guided member of the transfer member. FIG. 5 is a plan view showing a state of being guided by a guide section, and FIG. 5 is a plan view of a main part of a recording / reproducing apparatus having a conventional loading mechanism,
FIG. 6 is a plan view showing a state in which the second guided member of the transfer member constituting the conventional loading mechanism is guided by the other substantially Y-shaped guide portion. (Description of symbols) 1 ... Pole base (transfer member) 1a ... First guide pin (first guided member) 1b ... Second guide pin (second guided member) 2 ... Guide rail groove (Guide part) 2a ... First guide rail groove (one guide part) 2b ... Second guide rail groove (other guide part) 4 ... Tape, 5 ... Rotating drum 6 ... Tape cassette, 7 ... ... Vertical pole 8 ... Inclined pole, 13 ... Erase head 14 ... Arm, 14a ... Sliding contact surface 15 ... Shaft, 16 ... Spring 17 ... Engaging portion B ... Loading mechanism D ... Energizing means.

Claims (1)

[Scope of utility model registration request] 1. A transfer member having a vertical pole and an inclined pole for pulling out a tape from a tape cassette and contacting a rotating drum and an erasing head, and further having a first and a second guided member. By guiding and positioning the first and second guided members respectively, a guide portion branched into a substantially Y shape for positioning the transfer member at the tape loading position, and facing the rotary drum. And a biasing means for biasing the erasing head in the direction of the rotary drum, the transfer member engaging the biasing means, and the biasing means. By urging the transfer member in a predetermined direction, the first guided member is guided to one of the substantially Y-shaped guide portions along with the movement of the transfer member to be positioned and the second member is guided. Guide members substantially Y-shaped other guide loading mechanism guided to and characterized by being provided with engagement portions for positioning the unit.