JPH0741730U - Pinch roller crimping mechanism with tape guide pole - Google Patents

Abstract

(57) [Summary] [Purpose] To make effective use of the space on the chassis and to make the magnetic recording / reproducing device smaller. [Structure] A pinch roller crimping mechanism 20 with a tape guide pole includes an L-shaped arm 11 supporting a pinch roller 5.
And the L-shaped arm 11 and the U-shaped arm 21 partially connected via the spring member 12 to the same rotary shaft 14
Is rotatably supported on the chassis 1, and the rotational force in the direction A given to the U-shaped arm 21 is transmitted to the L-shaped arm 11 via the spring member 12 to move the pinch roller 5 onto the chassis 1. It is crimped to the arranged capstan 6. U
The V-shaped arm 21 has an extending portion 21a extending in the horizontal direction, and the tape guide pole 7 for guiding the magnetic tape J to the winding side tape reel Rb is arranged on the extending portion 21a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a pinch roller crimping mechanism with a tape guide pole that can be applied to a helical scan type magnetic recording / reproducing apparatus represented by a VTR device and the like.

[0002]

[Prior art]

 It is known to those skilled in the art that a helical scan type magnetic recording / reproducing apparatus represented by a VTR apparatus employs a pinch roller crimping mechanism that crimps a pinch roller to a driving capstan via a magnetic tape. Has been.

The VTR device shown in FIG. 3 is in a state in which a tape cassette T accommodating a supply-side tape reel Ra and a winding-side tape reel Rb around which a magnetic tape J is wound is mounted. This VTR device has a well-known structure including a rotary head body 2, a supply side tape tension guide pole 3, a pair of loading poles 4a and 4b, a pinch roller 5, a capstan 6, and a tape guide pole 7 on a chassis 1. With. The magnetic tape J drawn from the inside of the tape cassette T using the pair of loading poles 4a and 4b is wound around the rotary head body 2 and is pinched between the pinch roller 4 and the capstan 5 in the reproducing direction by the capstan drive. It is possible to drive. The magnetic tape J sandwiched between the pinch roller 5 and the capstan 6 is guided to the take-up side tape reel Rb through the tape guide pole 7. Hereinafter, a conventional pinch roller crimping mechanism adopted in such a VTR device will be described.

In a conventional pinch roller crimping mechanism 10 shown in an exploded state in FIG. 4, an L-shaped arm 11 that supports the pinch roller 5 and a J that is partially connected via the L-shaped arm 11 and a spring member 12. The character arm 13 is rotatably supported on the chassis 1 by the same rotary shaft 14. In this support, shaft holes are formed in the L-shaped arm 11 and the J-shaped arm 13, respectively. A drive pin 15 that penetrates vertically is provided in the middle of the J-shaped arm 13, and a toggle mechanism 16 that applies a force in the A direction (clockwise direction) is configured under the drive pin 15. The toggle mechanism 16 is rotatable about a rotary shaft 17 provided on the chassis 1, and has an arm 18 whose one end 18a is connected to a cam plate (not shown), and the other end 18b and one end 19a of the arm 18. It can be simply constructed from an arm 19 which is rotatably connected via a pin P and has a hole 19b1 formed at the other end 19b for fitting with the lower portion of the drive pin 15.

Using such a toggle mechanism 16, as shown in FIG. 5 (A), the pinch roller 5 is rotated from the state before the pinch roller 5 is pressed against the capstan 6 by applying a turning force in the A direction to the J-shaped arm 13. When displaced, this turning force is also transmitted to the L-shaped arm 11 connected via the spring member 12, and as shown in FIG. 5B, the L-shaped arm 11 is rotationally displaced in the same direction and pinched. The roller 5 is pressed onto the capstan 6.

Since the force in the A direction by the toggle mechanism 16 is applied to the L-shaped arm 11 via the J-shaped arm 13 and the spring member 12, the spring force of the spring member 12 is increased by the amount of the rotational force applied to the J-shaped arm 13. Since the elastic force increases and the pressure force of the pinch roller 5 against the capstan 6 increases, the biasing force of the spring member 12 at the final position of the J-shaped arm 13 acts as the pressure force of the pinch roller 5, so the pinch roller 5 It is possible to always hold the crimp of the constant.

[0007]

[Problems to be solved by the device]

 By the way, in the VTR device shown in FIG. 3, in order to provide the tape guide pole 7 for assisting the pulling out of the magnetic tape J, it is necessary to separately provide an arm member and its rotation fulcrum on the chassis 1. However, such a method inevitably requires a large space for arrangement and is not suitable for downsizing the device.

[0008]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides the following pinch roller crimping mechanism with a tape guide pole. That is, the first arm supporting the pinch roller and the second arm partially connected to the first arm via the spring member are rotatably mounted on the chassis with the same rotating shaft. The rotation force applied to the second arm in one direction is transmitted to the first arm via the spring member so that the pinch roller is pressed against the capstan arranged on the chassis. A pinch roller crimping mechanism with a tape guide pole, which comprises a tape guide pole configured to guide the magnetic tape sandwiched between the pinch roller and the capstan to the take-up side tape reel, wherein The arm has a horizontally extending portion, and the tape guide pole is supported by the extending portion. A pinch roller pressing mechanism with a tape guide pole.

[0009]

【Example】

 Hereinafter, the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing an embodiment of a pinch roller crimping mechanism with a tape guide pole according to the present invention, and FIGS. 2A and 2B are operation explanatory views of the mechanism. The pinch roller crimping mechanism 20 with a tape guide pole described in this embodiment is applied to the VTR device (magnetic recording / reproducing device) shown in FIG. 3 and has the same configuration as the conventional example shown in FIG. Therefore, the same components are designated by the same reference numerals to simplify the description. Therefore, only points of the invention will be described in the present embodiment.

A pinch roller crimping mechanism (hereinafter simply referred to as a mechanism) 20 with a tape guide pole, which is shown in a disassembled state in FIG. 1, includes an L-shaped arm (first arm) 11 supporting a pinch roller 5 and this L-shaped arm. The U-shaped arm (second arm) 21 partially connected to the U-shaped arm 11 via the spring member 12 is rotatably supported on the chassis 1 by the same rotation shaft 14. The U-shaped arm 21 corresponds to the J-shaped arm 13 shown in the prior art example, has an extending portion 21a extending in the horizontal direction, and has a tape guide pole 7 extending in the vertical direction at one end of the extending portion 21a. It is supported. Of course, a drive pin 15 is provided in the middle of the U-shaped arm 21 so as to extend vertically, and a toggle mechanism 16 for applying a force in the A direction (clockwise direction) is formed below the drive pin 15. .

In the mechanism 20 configured in this way as well, the toggle mechanism 16 is used to move the pinch roller 5 to the U-shaped arm 21 from the state before pressure contact with the capstan 6 as shown in FIG. 2 (A). When the turning force in the A direction is applied to rotate and displace, this turning force is also transmitted to the L-shaped arm 11 partially connected via the spring member 12, and as shown in FIG. The L-shaped arm 11 is rotationally displaced in the same direction, and the pinch roller 5 is pressed against the capstan 6. Further, the taper guide pole 7 supported by the extending portion 21a of the U-shaped arm 21 is also displaced in the same direction (direction A).

When the U-shaped arm 21 is continuously rotated after the pinch roller 5 is pressed against the capstan 6, only the U-shaped arm 21 continues to be rotationally displaced by the expansion of the spring member 12 and the tape guide pole 7 is moved. It keeps moving to the final position. At this time, the force exerted by the spring member 12 on the L-shaped arm 11 in the A direction increases, the pressing force of the pinch roller 5 to the capstan 6 increases, and the spring member 12 at the final position of the J-shaped arm 13 increases. Since the urging force becomes the pressure force of the pinch roller 5, the pressure force of the pinch roller 5 can be constantly maintained. .

In the mechanism 20 having such a configuration, the U-shaped arm 21 corresponding to the conventional J-shaped arm 11 has the extending portion 21a extending in the horizontal direction, and the magnetic tape J is wound around the extending portion 21a. Since the tape guide pole 7 that guides to the take-up side tape reel Rb is supported, when this is applied to a magnetic recording / reproducing device such as a VTR device, an arm member provided with the tape guide pole is attached to the chassis. Since there is no need to specially provide a complicated mechanism for supporting, there is a great advantage that the space on the chassis 1 can be effectively utilized and the magnetic recording / reproducing apparatus can be sufficiently miniaturized.

[0015]

[Effect of device]

 From the above description, in the pinch roller crimping mechanism with a tape guide pole of the present invention, the second arm has an extending portion extending in the horizontal direction, and the magnetic tape is guided to the winding side tape reel at this extending portion. Since the tape guide pole is supported, if this is applied to a magnetic recording / reproducing device such as a VTR device, a complicated mechanism of supporting the arm member with the tape guide pole on the chassis is specially provided. Since there is no need, there is an advantage that the space on the chassis can be effectively used and the size of the magnetic recording / reproducing apparatus can be sufficiently reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a pinch roller crimping mechanism with a tape guide pole according to the present invention.

FIG. 2A and FIG. 2B are explanatory views of the operation of the mechanism.

FIG. 3 is a plan view showing an example of a magnetic recording / reproducing apparatus.

FIG. 4 is an exploded perspective view showing an example of a conventional pinch roller crimping mechanism.

5A and 5B are operation explanatory views of the mechanism.

[Explanation of symbols]

 1 chassis 5 pinch roller 6 capstan 7 tape guide pole 11 L-shaped arm (first arm) 12 spring member 14 rotating shaft 20 pinch roller crimping mechanism with tape guide pole 21 U-shaped arm (second arm) 21a extension Output part J Magnetic tape Rb Winding side tape reel

Claims (1)

[Scope of utility model registration request] 1. A first arm supporting a pinch roller,
The first arm and the second arm partially connected via a spring member are rotatably supported on the chassis with the same rotation shaft, and the one direction is given to the second arm. To the first arm via the spring member to press the pinch roller against the capstan arranged on the chassis, and the pinch roller and the capstan are separated from each other. A pinch roller crimping mechanism with a tape guide pole, which comprises a tape guide pole for guiding the magnetic tape sandwiched between the tape reels to the take-up side tape reel, wherein the second arm has an extending portion extending in the horizontal direction, A pinch roller crimping mechanism with a tape guide pole, characterized in that the tape guide pole is supported on the extending portion.