JPS63191346A - Brake mechanism - Google Patents

Abstract

PURPOSE:To suitably release a reel brake at the time of drawing out and storing a quick winding post, by executing the driving of a mode switching member by a driving motor for loading a tape, in order to allow a reel brake release member to execute a release operation. CONSTITUTION:Switching of a position of a reel brake release member 3 is executed by a mode switching member 1. Also, when the member 3 is in a brake release position for releasing both brakes 4S, 4T, a drawing-out operation of quick winding posts 6s, 6t can be executed. Accordingly, at the time of drawing out the quick winding posts 6s, 6t, both reel bases 5S, 5T are set to a brake release state and a tape can be drawn out without applying an immoderate load. Also, when the member 3 is in a brake release position of one side for releasing the brake of a supply side, a storing operation of the quick winding 6s, 6t is executed. Therefore, at the time of storing the quick winding post, as soon as the mode is switched, the reel base 5S of the supply side is set to a brake release state, and the tape can be wound without overwinding.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a brake mechanism used in magnetic recording devices such as tape players and video decks.

(Prior Art) In general, in a magnetic recording device that uses tape as a magnetic recording medium, the idler gear is engaged with the reel base to perform play mode and fast winding mode, while when stopping, the idler gear is moved from the reel base. At the same time as it is disconnected, the reel brake is pressed against the reel base.

On the other hand, in magnetic recording devices such as tape players and video decks that use rotating heads, which have been developed and put into practical use in recent years, a loading block is advanced to pull out the tape and wind it around the rotating head. A loading operation is performed, and when the tape loading is completed, the play mode is performed by meshing the idler gear with the reel base on the arc-up side.

In such devices, when fast forwarding or rewinding,
If the tape is left wound around the drum, the winding torque increases and may damage the tape. In order to prevent this, it is necessary to perform fast forwarding and rewinding without wrapping the tape around the drum; for example, a method has been proposed in which a post exclusively for fast winding is used.

By the way, in such a magnetic recording device, when pulling out the fast-winding post, the reel brake must be released so that the tape can be pulled out.

However, if the fast-winding post is stored with both reel brakes released, the tape will also be wound at the same time, so if the reel pace torque on the winding side is large, the tape will be wound too much and the tape position will be incorrect. . Therefore, one possible method is to apply a brake to the reel base on the side that is not being wound when the fast-winding post is pulled out or stored, but in this case, if the reel on the winding side has completely wound the tape, the fast-winding post This creates a problem in that the reel brake is applied when pulling out the fast-winding post, and a load is applied to the tape that is being pulled out a little when pulling out the fast-winding post.

Therefore, it is necessary to release the reel brake appropriately when pulling out the fast-winding post and when storing the fast-winding post. When attempting to release the brake, the connection and switching structure with the reel brake release member becomes complicated, which is inconvenient.

(Problems to be Solved by the Invention) As explained above, in the conventional magnetic recording device equipped with a rotating head, the reel brake cannot be released appropriately when pulling out and storing the fast-winding post, and as a result, There have been problems in that a load is applied to the tape when the fast-winding post is pulled out, and the tape position is distorted when the fast-winding post is stored.

The present invention was proposed in order to solve the problems of the prior art, and its purpose is to appropriately release the reel brake when pulling out and storing the fast-winding post, and to apply load to the tape. To provide a brake mechanism which is free from problems such as skewing the tape position and has a simple configuration.

[Structure of the Invention] (Means for Solving the Problems) The brake mechanism of the present invention engages a mode switching member for mode switching with a reel brake release member, and this mode switching member allows the mode switching member to engage the reel brake release member when pulling out a fast-winding post. The reel brake release member performs a release operation, and the mode switching member is driven by a tape loading drive motor.

(Function) With the above-described configuration, the present invention allows the reel brake release member to be moved to the release position when the fast-winding post is pulled out, so that a slight load is placed on the tape that is pulled out by the operation of the fast-winding post. Moreover, since the mode switching member, which is an essential member in the construction of the device, is used as the switching member for the reel brake release member, the number of parts is small and the construction is simple.

(Embodiment) An embodiment of the brake mechanism according to the present invention as described above will be specifically described with reference to the drawings.

*Configuration of Embodiment In FIGS. 1 to 3, reference numeral 1 denotes a mode switching member driven by a tape loading drive motor (not shown). The mode switching member 1 moves forward to the left in the figure, from the backward position, cassette loading position, fast winding post pullout position (Fig. 1), to the stop position (second position).
), tape loading position (Fig. 3), and play position (not shown) are sequentially counted, and a cam surface 1a provided on one side of the reel brake switching member 2
is operated, and the position of the reel brake release member 3 is switched via this. The tape loading position also performs tape unloading, fast-winding post storage, and tape ejection.

In the figure, 2a is the shaft of the reel brake switching member, and 2b is a cam pin that engages with the cam surface 1a.

The reel brake release member 3 is rotatably provided around a shaft 3a, and due to the shape of the cam surface 1a of the mode switching member 1, ■Cassette loading and fast-winding post drawer when the mode switching member 1 is in the backward position When in the position, as shown in FIG. 1, the cam pin 2b of the reel brake switching member 2
rides on the protrusion of the cam surface 1a, causing the arc-up side and supply side engaging parts 3t, 3s to engage the respective reel brakes 4T, 43, and reel bases 5T, 5T on both sides.
To release the brake of 5S, take the brake release position on both sides (the farthest part on the counterclockwise side in the figure), and when the mode switching member 1 is in the stop position,
As shown in the figure, the cam pin 2 of the reel brake switching member 2
By falling into the recess of the cam surface 1a, the brake position (the end on the clockwise side in the figure) that does not prevent both reel brakes 4T and 43 from being pressed against the reel bases 5T and 53 is taken, and ■Mode switching Tape loading and tape unloading in which member 1 has moved roughly to the left from the stop position,
In the early winding post storage and eject position, as shown in Fig. 3, the cam pin 2 of the reel brake switching member
When b rides on the middle stage of the cam surface 1a, its engaging portion 3S is engaged only with the supply side reel brake 4S, and the supply side reel base 5S is released and maintained in the arc-up side brake state. It is configured to take the brake release position on one side.

Further, in other mode positions such as the play position, the position of the reel brake release member 3 can be similarly switched depending on the shape of the cam surface 1a.

In addition, the reel brake release member 3 and each reel brake 4T, 43 are each a spring 3b.

4t and 4s are biased in the braking direction, and the biasing force applied to the reel brake release member 3 is larger. The urging force applied to the reel brake release member 3 is applied to the cam pin 2 of the reel brake switching member 2.
It also serves as a biasing force that presses b against the cam surface 1a of the mode switching member 1.

In addition, the quick-winding post 6t on the arc up side and supply side
, 6s are provided at a predetermined interval. The quick-winding posts 6t, 6s are fixed perpendicularly to the ends of support arms 8t, 8s that are rotatably attached to support shafts 7t, 7S provided on the board of the device, and each support shaft 7
It rotates together with cams 9t and 9s fixed to the lower ends of t and 7S. These cams 9t, 9S are the pressing portions 1 of the fast-winding post pull-out member 11 that moves linearly to the left in the figure by the rotation of a drive gear 10 connected to a drive motor for cassette loading (not shown) in the clockwise direction in the figure.
It is pressed by 1t and 11S, and rotates in the direction of pulling out the quick-winding post.

As shown in FIG. 3, the storing operation of the quick-winding posts 6t and 6s is performed when the mode switching member 1 is in a position shifted roughly to the left from the stop position, and the reel brake release member 3 is in the brake release position on one side. It is set so that it will be performed when the Further, when the fast-winding posts 5t, 6S are stored, the reel base 5S on the supply side rotates to rewind the tape drawn out by the fast-winding posts 6t, 6s.

Functions of this embodiment The functions of this embodiment having the above-described configuration are as follows.

■Condition before cassette loading when pulling out the flat roll post (ejection complete condition)
1, the mode switching member 1 is at the cassette loading start position, which is the retracted position,
Since the reel brake release member 3 is in the brake release position on both sides, the respective engaging portions 3t and 3s on the arc up side and the supply side engage with the respective reel brakes 4T and 43,
The brakes on both reel bases 5T and 5S are released.

In this state, when a cassette is inserted, a cassette insertion detection means (not shown) functions and the cassette loading drive motor starts operating.

As a result, the drive gear 10 rotates clockwise in the figure due to the rotation of the drive motor for cassette loading, and the fast-winding post drawer member 11 moves linearly to the left in the figure.
Cams 9t, 9s and quick-winding posts 5t, 5 integrated with them
s is pulled forward and assumes the forward position as shown in FIG. Next, due to the rotation of the drive motor for tape loading, the mode switching member 1 starts moving forward to the left in the figure and moves to the stop position as shown in FIG. Move to position. In addition,
As described above, the pulling out operation of the fast-winding posts 6t and 6s is performed when the mode switching member 1 is in the fast-winding post pull-out position.
Since the reel brake release member 3 is in the brake release position on both sides as shown in FIG. 1, the fast winding post 6
The tape is drawn out by the advance of the reel base, starting from the side with the least load on both reel bases.

■When the flat roll post is stored When an eject command is issued from the stop position as shown in Figure 2, the mode switching member 1 starts moving to the left in the figure due to the rotation of the drive motor for tape loading.
Move to the quick-winding post storage and eject position as shown in Figure 3. Therefore, the reel brake release member 3 moves to the brake release position on one side. Next, the drive motor for cassette loading rotates in the reverse direction, and the drive gear 10 rotates counterclockwise in the figure, causing the quick-winding post drawer member 11 to rotate.
returns to the right side in the figure, so the quick-winding posts 6t, 5S return to the retracted position as shown in FIG. Since the return operation of the quick-winding posts 5t, 5s is performed when the reel brake release member 3 takes the brake release position on one side, similarly to the pulling-out operation, the tape that was pulled out by the fast-winding posts 5t, 5s is is wound up by the rotation of the reel base 5S on the supply side. After the eject operation is completed, the mode switching member 1 is moved to the state shown in FIG. 1 by reversing the tape loading motor in preparation for the next cassette loading operation.

As explained above, in this embodiment, the mode switching member 1 switches the position of the reel brake release member 3, and when the reel brake release member 3 is in the brake release position where both brakes are released. Since the early-winding post is pulled out, when pulling out the early-winding post, both reel bases are in the brake release state.
Tape can be pulled out without applying excessive load.

In addition, when the reel brake release member 3 is in the one-side brake release position that releases the brake on the supply side, the fast-winding post is retracted, so when the fast-winding post is stored, the mode can be switched simultaneously and reliably. By setting the reel base 5S on the supply side in a brake-released state, the tape can be wound without over-winding the tape. Furthermore, since the mode switching member 1 is used as it is as a switching member for the reel brake release member, the configuration is simple.

*Other Examples It should be noted that the present invention is not limited to the above-mentioned embodiments, but may vary depending on the shape and arrangement of the reel brake release member, the reel brake, etc., and the relationship between the mode switching member and the reel brake release member. The connection structure and the like can be selected as appropriate, and the peripheral mechanisms such as the tape loading mechanism and the drive structure of the reel base can be freely selected.

[Effects of the Invention] As explained above, according to the present invention, the reel brake can be released when pulling out the fast-winding post by operating the mode switching member. To provide a brake mechanism with a simple configuration, which can draw out the tape and wind the tape without disturbing the tape position when storing the fast-winding post.

[Brief explanation of the drawing]

The drawings are plan views showing one embodiment of the brake mechanism of the present invention, in which Fig. 1 shows the cassette loading and fast-winding post pull-out positions, Fig. 2 shows the stop position, and Fig. 3 shows tape loading, tape unloading, Shows early winding post storage and eject position. 1...Mode switching member, 1a...Cam surface, 2...
Reel brake switching member, 2a... shaft, 2b... cam pin, 3... reel brake release member, 3a...
Shaft, 3b...spring, 3t, 3s...engaging part,
4T, 43...Reel brake, 4t, 4S...Spring, 5T. 5S... Reel base, 6t, 6s... Fast winding post, 7t, 7s... Support shaft, 8t, 3s... Support arm, 9t, 9s... Cam, 10... Drive gear, 11
... Quick roll post drawer member, 1it, 11S...
Pressing part.

Claims (1)

[Claims] A brake mechanism that presses a reel brake against the reel bases on the arc-up side and the supply side, including: a. A fast-winding post that is pulled out forward after cassette loading is completed. b. Reel base on arc-up side and supply side. c. Reel brake that presses against the reel base. d. Reel brake release member for releasing the reel brake. e. In addition to switching the mode, the reel brake release member is placed in the brake release position when the fast-winding post is pulled out, and the reel brake release member is placed in the position where only one reel brake is released when the fast-winding post is retracted. A mode switching member that performs switching. f. Drive means for driving the mode switching member. A brake mechanism characterized by having each of the requirements a to f above.