JPH03185664A - Magnetic tape loading device - Google Patents

Abstract

PURPOSE:To reduce the number of parts and assembling man-hour by making the constitution so that the transmission force from a loading cam member is transmitted directly to a tension arm with a loading transmission member. CONSTITUTION:A loading cam member 123 provided at a chassis 1 so that it can be rotated and obtains a prescribed mode, tape guide blocks 4, 5 which move along a guide hole formed on the chassis 1, and a tension arm 21 provided on the chassis to be freely movable and which turns between a loading position and an unloading position, are provided. A tension spring 15 with one end attached to this tension arm and which presses the tension arm to the loading position, and a loading transmission member 200 with one end engaged to the loading cam member and moves back and forth interlocking with the rotation of the loading cam member, are provided. The tension arm 210 repeats the engagement/disengagement with the loading transmission member 200, and moves between the loading position and the unloading position. Thus, the production cost and the assembling man-hour are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic tape loading device equipped with a tension arm that rotates between a loading position and an unloading position.

[Prior Art] Figures 11 to 13 are plan views showing an example of a conventional magnetic tape loading device disclosed in Japanese Unexamined Patent Publication No. 64-56040, in which 1 is a chassis 52° and 3 is a chassis. The first and second guide grooves 4 and 5 formed in 1 are slidably supported in the guide grooves 2 and 3.
, 6.7 are first and second stoppers for positioning the first and second tape guide blocks 4.5, 10 is a rotating drum, and 11 is a tension arm, which connects the intermediate part to the chassis 1. shaft 14 erected in
A tension ball 12 is erected at one end. Reference numeral 15 denotes a tension spring that always urges the tension arm 11 in the counterclockwise direction.

Reference numeral 123 denotes a loading cam member, which is supported by a shaft 137 erected on the chassis 1, and has cam grooves 138, 138 formed on its front and back surfaces, respectively, so as to be displaced from the outer circumference to the inner circumference. 121 is a motor, and 122 is a deceleration transmission means, which transmits the driving force of the motor 121 to the loading cam member 123. 124 is an arm, one end of which is supported by a shaft 134 erected on the chassis 1;
A bottle 125 that engages with 36 is provided upright. Reference numeral 126 denotes a first mode switching member, and the mode switching member 126 is configured such that a bin 128 erected on the chassis 1 and a guide groove 126a provided on the member 126 are engaged with each other. The guide groove 127 and the pin 129 erected on the member 126 are engaged with each other, and are reciprocatably attached to the upper surface of the chassis 1. A groove portion 126b that engages with a bin 135 on the arm 124 is formed at one end of the first mode switching member 126, and a cam portion L26c for controlling a reel brake (not shown) is formed in the member 126. Also provided. 130 is the first mode switching member 126 and the bottle! The second mode switching member 129 is fixed to the chassis 1 through a second mode switching member 129, and the second mode switching member 132 is fixed to the chassis 1 through a guide groove 127 formed in the chassis 1. The second mode switching member 130 is reciprocably supported by engaging with a guide groove 131 formed in the first mode switching member 130.
It can move integrally with the mode switching member 126 of. The second mode switching member 130 is provided with a cam portion 133 for controlling a reel brake (not shown).

14 and 15 are plan views of the back side of the deck of the magnetic data loading device shown in FIGS. 11 to 13, seen from the front, and 62 is an arm, one end of which is connected to a shaft 63 erected on the chassis 1. It is pivotally supported and has a first pin 64 and a second pin 65 that engage with the cam groove 138 at the other end.

Reference numeral 50 denotes a loading transmission member, and lengths 150a, 50b, and 50c provided on the loading transmission member 50 engage with a bin 5960.61 provided upright on the chassis l, so that it can reciprocate freely. Furthermore, loading transmission member 50
one end of which engages a second throat 65 on the arm 62; il 50d, and a bottle 53 is erected at the other end. Reference numerals 55 and 56 denote first and second loading links each consisting of two links, and first and second gears 57 and 58 are fixed to one end of each,
The gears 57, 58 are connected to the first and second racks 5, respectively.
It meshes with 1.52.

The other ends of the first and second loading links 55,56 are respectively connected to the first and second tape guide blocks 4.
It is engaged with 5.

Figures 16 and 17 are plan views of the main parts of Figure 11;
Reference numeral 3 denotes a swinging arm, which is pivotally supported by a shaft 16 erected on the chassis 1, and the bin 53 is engaged with 413a provided at one end. The other end of the swing arm 13 has a first abutting part 13b and a second abutting part 13c which are to be in contact with the tension arm 11. The second contact portion 13c is connected to the swing arm 1
It is formed in a circular arc shape with respect to the axis 16 which is the rotation center of 3.

Next, the operation of the magnetic tape loading device having the above configuration will be explained. FIG. 11 and FIG. 14 are plan views showing a state in which magnetic tape loading is completed, and the magnetic tape 40 constitutes a tape path on which recording and reproduction can be performed. The tension arm 1111 is at a loading position where the tension of the magnetic tape 40 can be controlled.

When the unloading operation starts, the motor 121 rotates, and the loading cam member 123 starts rotating in the direction of arrow E in the figure via the deceleration transmission means 122. In response to the change from the inner circumference to the outer circumference of the cam groove 136, the arm 12
4 rotates in the direction of arrow F in the figure, and further, the first mode switching member 126 and the second mode switching member 130 move in the direction of arrow G in the figure, and the first and second mode switching members 126. Cam portions 126c provided on each 130
, 133 pass through a mode in which predetermined brake control is performed, the tape unloading mode is entered, and the bin 132 as an abutting portion provided on the second mode switching member 130 is connected to the end of the tension arm 1. The tension arm 11 is rotated clockwise in the figure by coming into contact with the edge portion 113 as a driven portion. When the tension arm 11 reaches the intermediate standby position as shown in FIG.
The pin 125 erected at 24 reaches the outermost concentric interior of the cam holder 136, and the arm 124 and the first and second mode switching members 126 and 130 stop moving.

In this way, the tension arm 11 moves from the loading position shown in FIG. 1 to the intermediate standby position shown in FIG.
In the second movement range, the first and second mode switching members 12
6. Moved at 130.

Furthermore, when the first loading cam member 123 rotates, the loading cam member 123 rotates as shown in FIG.
In response to the change from the inner circumference to the outer circumference l\ of the arm 138 provided at 50 on the first rack 51.
52, the first and second loading links 5
The driving force is transmitted to 5.56 to unload the first and second tape guide blocks 4.5, and at the same time, the loading transmission member 50 is moved by rotating the swinging arm 13 in the direction of the arrow. , one end contact portion 131+
comes into contact with the driven portion 114 at the end of the tension arm 11. Due to this contact with the swinging arm 13, the tension arm 11 rotates clockwise in the figure.
3 moves from the first abutting part 13b to the concentric second abutting part 13c of the shaft 16.
The unloading position as shown in FIGS. 3, 15 and 17 is reached.

In this manner, the tension arm 11 is moved by the swing arm 13 in the first movement range from the intermediate standby position shown in FIG. 12 to the unloading position shown in FIG. 13.

Next, the loading operation will be explained. From the state shown in FIGS. 13 and 15, the motor 121 starts rotating in the opposite direction to that during unloading, and the motor 1162
The loading transmission member 50 is moved in the direction of arrow M in the figure. Then, the tape guide blocks 4 and 5 move from the unloading position to the first and second stoppers 6.
．． 7, and at the same time, by counterclockwise rotation of the swing arm 13, the part that contacts the tension arm 11 moves from the second contact part 13e to the first contact part 13b, and the tension is increased. The tension arm 11 biased by the spring 15 follows the rotation of the swing arm 13 and rotates in the loading direction. After rotating for a while, the tension arm 11 reaches the intermediate standby position shown in FIG. 11, and when the convex portion 113 of the tension arm 11 comes into contact with the bin 132, the rotation of the tension arm 11 stops momentarily. Furthermore, when the loading cam member 123 rotates, the first and second mode switching members 126 and 130 move in the H direction in the figure, and the tension arm 11 maintains the abutting relationship with the pin 132 in the figure. It rotates counterclockwise in the middle, and eventually comes out of contact with the bottle 132 and reaches the loading position shown in FIG. 11.

The problem that r invention tries to solve! ] In the conventional magnetic tape loading device, when the tension arm 11 is moved in either the loading direction or the unloading direction, the swing arm 1 is moved in the first movement range from the unloading position to the intermediate standby position.
3, and in the second movement range from the intermediate standby position to the loading position, the mode switching members 126 and 130 engage with the loading cam member 123, and the loading cam In order to transmit the transmission force of the member 123 to the tension arm 11, various parts such as the swing arm 1) 13, the arm 124, the mode switching members 126 and 130, and the pin 132 are required,
There were problems in that the production cost increased and the number of assembly steps also increased.

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a magnetic tape loading device that can reduce manufacturing costs and assembly man-hours.

[Means for Solving the Problems] A magnetic tape loading device according to the present invention includes a loading cam member rotatably provided on a chassis to obtain a predetermined mode, and first and second guide holes formed in the chassis. first and second tape guide blocks that move along the chassis; a tension arm that is rotatably provided on the chassis and rotates between a loading position and an unloading position; and one end attached to the tension arm. and a tension spring that urges the tension arm to the loading position, and a loading transmission member that has one end engaged with the loading cam member and that reciprocates in conjunction with the rotation of the loading cam member.

[Function] The tension arm of the magnetic tape loading device according to the present invention repeatedly engages and disengages from the loading transmission member.
Move between loading and unloading positions.

[Example] The present invention will be described in detail below. FIG. 1 is a plan view showing an unloading state of a magnetic tape loading device showing one embodiment of the present invention, and FIG. 2 is a plan view of the back side of the deck in the state shown in FIG. 1, and FIGS. 1st
The same or corresponding parts as in FIG. 7 are given the same reference numerals, and the explanation thereof will be omitted.

In the figure, 200 is a loading cam member 1 at one end.
The loading transmission member has a pin 201 that engages with a shaft 23 (not shown), and the other end has a pin 202 and a bending part that control the operation of a tension arm 210 that is rotatable around a rotating shaft 211. It has 203. 21
2 is a tension ball provided at the tip of the tension arm 210; 213 is a first contact portion that contacts the folding portion 203; 214 is a second contact portion that contacts the bottle 202;
220 is a pinch arm having a pinch roller 221 at its end, and 222 is a preload receiver formed at the tip of the pinch arm 220 and abutting on the third contact portion 215. In addition,
223 is a capstan shaft.

Next, the operation of the above configuration will be explained. Figure 2 is a plan view when the loading operation is started, and the motor 1
21 starts rotating in the opposite direction to that during unloading, the loading member 123 rotates at the same time via the deceleration transmitting means 122, and the loading transmitting member 5o rotates in the direction of arrow P in the figure via the arm 62. The first and second tape guide blocks 4.5 start moving from the unloading position in the direction of the first and second stoppers 6.7. At the same time, the loading transmission member 200 is moved in the O direction by the bin 201 engaged with the loading cam member 123, and the bent portion 203 comes into contact with the first contact portion 213 of the tension arm 210 (see FIG. 3).

Subsequently, the pinch arm 220 rotates clockwise in conjunction with the rotation of the loading cam member 123, and the preload receiver
22 is separated from the third contact portion 215, but the first contact portion 213 of the tension arm 210 is in contact with the folding portion 203, and its rotation is restricted. Further, the first and second tape guide blocks 4.5 are in a stopped state (see FIG. 4).

Next, the pinch arm 220 also stops rotating along with the tape guide blocks 4 and 5, and then the loading transmission member 200 moves in the Q direction, and as a result, the bending portion 203
With the first contact portion 213 in contact with the tension arm 210, the tension arm 210 rotates 1H1i'i counterclockwise by the spring force of the tension spring 15 (see FIG. 5).

As the loading transmission member 200f+ moves, the tension arm 210 continues to rotate counterclockwise due to the spring force of the tension spring 15.
The tip of the tension arm 210 contacts the first tape guide block 4, and the tension arm 210 contacts the first tape guide block 4.
(see Figure 6g), press with a spring force of tension 15.
Thereafter, the second contact portion 214 contacts the bin 202 and the counterclockwise rotation of the tension arm 210 is stopped (see FIG. 7), and in this state, the first tape guide block 4.5 and the second tape guide block 4.5 starts moving again in the direction l\ of the first and second stop 6.7, and the first and second stop 6.
7 and the first and second tape guide blocks 4
The movement at °5 is stopped (see Figure 8).

The loading transmission member 200 moves in the direction of arrow O, and as a result, the tension arm 210 has a tension value j;
+15 spring force causes the second contact portion 214 to press against the bottle 20.
The tension arm 210 rotates in the counterclockwise J] direction while abutting the tension arm 210 and stops at the FF and FR positions (see Fig. 9).When the loading transmission member 200 further moves in the direction of the arrow O, the tension arm 210 The abutment between the abutting portion 214 and the bin 2°2 is released and the bin is in a free state, and the binch arm 220 rotates clockwise due to the rotation of the loading cam member 123, and the pinch roller 22 is attached to the capstan shaft 223.
1 comes into contact with the magnetic tape, and the magnetic tape becomes ready for recording and reproduction.

From the loading operation to the unloading operation, the above steps may be performed in reverse.

[Effects of the Invention] As explained above, according to the magnetic tape loading device of the present invention, the transmission force from the loading cam member is directly transmitted to the tension arm via the loading transmission member. This has the effect of reducing the number of parts and assembly man-hours, resulting in lower manufacturing costs.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the unloading state of a magnetic tape loading device according to this embodiment, and FIG.
A plan view of the back side of the deck in the state shown in the figure, seen from the front, 3rd
10 to 10 are plan views showing each aspect from the unloading position to the loading position, FIGS. 11 to 13 are plan views showing each aspect of a conventional magnetic tape loading device, and FIGS. 14 and 15. is a plan view of the back side of the deck seen from the front, Figure 14 is a diagram at the loading position, Figure 15 is a diagram at the unloading position, and Figure 1 is a diagram at the unloading position.
FIG. 6 is an enlarged view of the main parts at the intermediate standby position, and FIG. 17 is an enlarged view of the main parts at the unloading position. 1 is the chassis, 2.3 is the first and second guide hole, 4
．． 5 is the first and second tape guide block, 15 is the tension bar J2, 123 is the loading cam member, 2
00 is a loading transmission member, and 210 is a tension arm. The same reference numerals in the figures indicate the same or corresponding parts. Agent So Ga Do Teru Figure 11 Figure 12゜Figure 13 Figure 1 + Figure 1〕Figure! Figure 16

Claims (1)

[Claims] a loading cam member rotatably provided on the chassis to obtain a predetermined mode; first and second tape guide blocks that move along first and second guide holes formed in the chassis; a tension arm that is rotatably provided and rotates between a loading position and an unloading position; a tension spring that has one end attached to the tension arm and urges the tension arm to the loading position; a loading transmission member that engages at one end and reciprocates in conjunction with the rotation of the loading cam member;
In the magnetic tape loading device, the tension arm moves between the loading position and the unloading position by repeatedly engaging and disengaging from the loading transmission member.