KR19980040416A - Reel brake device for video cassette tape recorder - Google Patents

Abstract

The present invention relates to a reel brake device of a video cassette tape recorder, and in particular, a main brake which is rotatably fixed to the main base by a hinge axis and which is spring-tightened on the main base so that the friction pad moves in a direction in contact with the reel. The main brake and the mode plate continuously forming the first stage, the second stage, and the third stage are rotatably installed on the hinge shaft so that the spring brake sub-brake is rotated to rotate a limited range of angle with respect to the main brake. It is easy to operate.

In addition, by configuring the hinge shaft of the main brake and the sub brake rotatably fixed to the main base on the same axis, it is possible to reduce the number of parts and the number of assembly process to improve the production efficiency.

Description

Reel brakes for video cassette tape recorders

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video cassette tape recorder (hereinafter referred to as VRC), and more particularly, to a reel brake device for restricting rotation of a supply reel and a take-up reel for receiving a rotation torque from an idle gear to drive a tape.

In general, VRL is a device for recording an image signal on a magnetic recording tape or reproducing the recorded signal. VRL is a traveling system for moving the tape T along a predetermined path as shown in FIG. And a drive system including a supply reel 10 and a winding reel 20 for supporting the tape cassette C and driving the tape T in a selected direction. It is comprised in the upper part, respectively.

On the other hand, gears 12 and 22 meshing with the idle gear 60 that receives power from the capstan motor 50 are formed at the peripheral edges of the supply reel 10 and the take-up reel 20, respectively. The upper portions of the (12) and (22) are formed with brake drums (14) and (24) with a step. The main brakes 16 and 26 are provided on the outer circumference of the gears 12 and 22, and the sub brakes 18 and 28 are provided on the outer circumference of the brake drums 14 and 24. At the periphery of the brake drum 14 of the supply reel 10, a tension lever 40 on which the tension band 42 is wound is provided on the main base 1.

Hinge shafts 16a, 18a, 26a and 28a formed on each of the main brakes 16 and 26 and the sub brakes 18 and 28 are coupled onto the main base 1, and the hinge shafts 16a. Springs 17 and 27 are installed at the proper positions from the 18a, 26a and 28a so that one side is supported on the main base 1. Of the main brakes 16, 26 and the subbrakes 18, 28, which rotate about the hinge shafts 16a, 18a, 26a, 28a by compression or expansion of the springs 17, 27. One side is provided with a friction pad 25 for limiting the rotation of the supply reel 10 and the take-up reel 20, the boss (16b) (18b) to be inserted into the rectangular groove (2) formed in the main base (1) ( 26b) 28b are formed in the downward direction. The bosses 16b, 18b, 26b, and 28b are installed on the bottom surface of the main base 1 and are in contact with the edges of the mode plate 20, which moves horizontally, between the rectangular grooves 2 of the main base 1. Will be linked. Typically, the mode plate 30 is coupled to a cap gear that receives power from the driving motor M and a relay lever coupled to the cap gear to perform the corresponding mode.

However, in the conventional reel brake device, as the hinge shafts formed on the respective main brakes and the sub brakes are differently combined on the main base, the number of parts and the number of assembly processes are increased, thereby reducing workability and production efficiency. There was a problem.

Accordingly, the present invention has been made to solve the above problems, the object is to combine the main brake and the sub-brake on one coaxial axis to reduce the number of parts and assembly process and at the same time simple and easy to combine The present invention provides a reel brake device of a video cassette tape recorder capable of improving productivity.

1 is a plan view schematically showing a driving mechanism and a driving mechanism of a typical video cassette tape recorder;

2 is a perspective view showing a mounting structure of a reel brake according to the present invention;

Figure 3 (a) is a plan view showing the operating state of the reel brake according to the present invention, (b) is a plan view showing the operating state of the reel brake according to the present invention, (c) is an operating state of the reel brake according to the present invention Top view shown.

* Description of the symbols for the main parts of the drawings *

1: main base 10: supply reel

12, 22: gear 14, 24: brake drum

100: main brake 100a: hinge axis

110: friction pad 120: spring

130: first jam fun 140: stopper

150: boss 200: sub brake

230: second engaging piece 300: torsion spring

400: mode plate 410: first stage

420: second stage 430: third stage

The object of the present invention is rotatably fixed to the main base by the hinge axis, the main brake spring-tightened on the main base so that the friction pad is moved in the direction in contact with the reel, rotatably coupled to the hinge axis, A sub-brake which is spring-tipped to rotate at a limited range of angle with respect to the brake, a first stage that cooperates with the main brake to allow the main brake and the sub brake to limit the rotation of the reel, and the main brake to the reel. The subbrake can be achieved with a mode plate consisting of a second stage that allows rotation and limits the rotation of the reel, and a third stage where the main and subbrake allow the rotation of the reel.

The first locking piece protruding on one side of the main brake, the second locking piece protruding on one side of the sub brake, and the hinge shaft are supported on both ends of the first locking piece and the second locking piece. And a torsion spring which is supported on one side, and which is stiffened to move the sub brake in a direction contacting the reel with respect to the main brake, and a stopper which protrudes on the other side of the main brake to restrict the movement of the sub brake to the reel at a predetermined position. It is preferable to.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a reel brake device of a video cassette tape recorder according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 2, the main brake 100 is rotatably coupled to the main base 1 by a hinge shaft 100a formed at a lower portion thereof, and the main base 100 is moved in a direction in which the friction pad 110 contacts the reel. The spring 120 is supported by 1). The sub brake 200 is rotatably coupled to the hinge shaft 100a and installed to rotate at a limited range with respect to the main brake 100 supported by the spring 120 on the main base 1.

The first locking piece 130 is formed at one side of the main brake 100, and the second locking piece 230 is formed at one side of the sub brake 200. The torsion spring 300 is installed to be supported by the hinge shaft 100a so that both ends thereof are supported by the first locking piece 130 and the second locking piece 230. The torsion spring 300 is carried so as to move the sub brake 200 in a direction in contact with the reel with respect to the main brake 100. On the opposite side of the first locking piece 130 formed on the main brake 100, the stopper 140 protrudes to restrict the movement of the sub brake 200 to the reel side at a predetermined position.

Meanwhile, the main brake 100 having the boss 150 formed on the lower portion of the main brake 100 interlocks with the mode plate 400 in which the first stage 410, the second stage 420, and the third stage 430 continuously form a step. It is installed.

According to this configuration, the relationship between the main brake 100 and the sub brake 200 by the mode formed on the mode plate 400 will be described in detail with reference to the accompanying drawings.

3 (a) is a state in which the first end 410 formed on the mode plate 400 is positioned to allow the main brake 100 and the sub brake 200 to restrict the rotation of the reel. The main brake 100, which is rotatably fixed to the main base 1 by 100 a, is provided with a friction pad 110 supplied with a friction pad 110 by compression of the spring 120 supported by the main base 1. The gears 12 and 22 formed on the lower periphery of the winding reel 20 are pressed. The sub brake 200 rotatably coupled to the hinge shaft 100a has a first end in a limited range of the first engaging piece 130 and the stopper 140 formed at one side and the other side of the main brake 100, respectively. Steps in the gear portions 12 and 22 of the reel by the torsion spring 300 supported by the locking piece 130 and supported by the second locking piece 230 protruding from one end of the sub brake 200. Pressurizes the brake drums (14, 24) formed to be. The second locking pieces 230 of the stopper 140 and the sub brake 200 protruding on the other side of the main brake 100 by a step formed between the gear units 12 and 22 and the brake drums 14 and 24. ) Will maintain the spacing.

(B) is the second stage 420 is formed in succession as the first stage 410 formed in the mode plate 400 is moved, the main brake 10 allows the reel to rotate, the sub brake ( 200 is a state in which the rotation of the reel is reduced.

As the boss 150 of the main brake 100 in contact with the first end 410 formed in the mode plate 400 moves to the position of the second end 420, the supply reel 10 and the take-up reel 20 The friction pad 150, which is in close contact with the gears 12 and 22 of the), falls while rotating about the hinge shaft 100a of the main brake 100, and one end of the torsion spring 300 is connected to the main brake (100). It is moved along the first locking piece 130 of (100). On the contrary, the other end presses the second locking piece 230 of the sub brake 200 toward the reel side. When the other end of the torsion spring 300 presses the second locking piece 230, the sub brake 200 is pressed as the pressure of the second locking piece 230 and the stopper 140 is greater than or equal to that of the stopper 140. Is limited by the stopper 140 formed in the main brake 100 to limit the rotation of the brake drum (14, 24).

(c) is shown as the third stage 430 formed continuously as the second stage 420 formed in the mode plate 400 is located. The main brake 100 and the sub brake 200 have restricted the rotation of the reel.

As the boss 150 of the main brake 100, which is in contact with the second end 420 formed on the mode plate 400, moves to the position of the third end 430, the main brake 100 has a hinge shaft ( While rotating about 100a, it is further away from the gears 12 and 22 of the supply reel 10 and the take-up reel 20, and one end and the other end of the torsion spring 300 are also first engaging pieces 130. And while supporting the second locking piece 230 is to move along the main brake (100). The sub brake 200 is pressurized by the second locking piece 230 by the torsion spring 300 in a limited range of the first locking piece 130 and the stopper 140 formed on one side and the other side of the main brake 100, respectively. As the second catching member 230 is limited by the stopper 140 and moved away from the brake drums 14 and 24, the main brake 100 and the sub brake 200 allow the reel to rotate. Will be.

As described above, the reel brake device of the video cassette tape recorder according to the present invention is rotatably fixed to the main base by a hinge axis, and the main brake spring-tightened on the main base so that the friction pad moves in a direction contacting the reel. And a spring plate-tipped subbrake rotatably installed on the hinge shaft such that the spring brake is rotated at a limited range of angle with respect to the main brake. And the main brake can be operated easily. In addition, by configuring the hinge shaft of the main brake and the sub brake rotatably fixed to the main base on the same axis, it is possible to reduce the number of parts and the number of assembly process to improve the production efficiency.

Claims (2)

A main brake (100) rotatably fixed to the main base (1) by the hinge shaft (100a) and supported by a spring (120) on the main base (1) to move in a direction in contact with the reel; A subbrake (200) rotatably coupled to the hinge shaft (100a) and supported by a spring (120) to rotate at a limited range of angle with respect to the main brake (100); By interlocking with the main brake 100, the first stage 410, which allows the main brake 100 and the sub brake 200 to limit the rotation of the reel, and the main brake 100 is rotated relative to the reel And the second brake 420 to limit the rotation of the reel, and the third brake 430 to allow the main brake 100 and the sub brake 200 to rotate the reel continuously. Reel brake device of the video cassette tape recorder made of a mode plate 400 made. The method of claim 1, wherein the first engaging piece 130 protruding on one side of the main brake 100 and: A second locking piece 230 protruding from one side of the sub brake 200; It is supported by the hinge shaft (100a), both ends are supported by the first engaging piece 130 and the second engaging piece 230, the main brake 100 in the direction in contact with the reel to the reel A torsion spring 300 which is hard to move; A reel brake device of a video cassette tape recorder comprising a stopper (140) configured to protrude on the other side of the main brake (100) to restrict movement of the sub brake (200) to the reel at a predetermined position.