JPH0423254A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To miniaturize a brake mechanism by inclining the center line of the turning fulcrums of supply and take-up brake levers with respect to the center line of a reel and arranging a supply brake member at the same height as a band brake. CONSTITUTION:A line connecting the centers of the turning fulcrums of both brake levers for supply and take-up 20 and 26 is inclined with respect to a line connecting the centers of the reels 13 and 23. Then, the brake member for supply 21 is arranged to the aperture part of the band brake 16 wound to the cylindrical part of the reel 13 and at the same height as the band brake so as to control the tension of a tape 3 almost constant. Thus, the cylindrical part of the reel 13 can be used for both brakes. Therefore, the cylindrical part is made short and a brake lever, etc., is prevented from projecting from a cassette. As a result, the brake mechanism is miniaturized and made thin.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a recording and reproducing apparatus that can be used in digital audio tape recorders and the like.

2. Description of the Related Art In recent years, recording and reproducing devices have become smaller and thinner, and recent digital audio recorders are no exception.

The conventional recording and reproducing apparatus described above will be explained below with reference to the drawings.

FIG. 4 shows a conventional recording/reproducing device.

In the figure, 1 is a rotary cylinder equipped with a magnetic head, 2 is a tape cassette in which a magnetic tape 3 is wound and stored, and 4 is a cassette ejector that regulates the running height of the magnetic tape 3 pulled out from the cassette 2. A side guide pin, 5 is an intermediate guide pin that guides the magnetic tape 3, 6 is a magnetic tape 3
A guide roller on the cylinder entry side for converting the travel path of the cylinder and regulating the travel height at the rotating cylinder part.
7 is an inclined pin on the cylinder entry side for guiding the magnetic tape 3 smoothly into the cylinder. 8 is a cylinder entry side inclined pin.
a cylinder exit side inclined pin for returning the magnetic tape 3 to its original state after being spirally wound around the cylinder; reference numeral 9 denotes a cylinder exit side guide roller for changing the running path of the tape in the same way as the cylinder entry side guide roller 6; and 11 are a capstan and a pinch roller for driving the magnetic tape. The magnetic tape 3 is driven by a cap stan 10 and a pinch roller 11 in six directions indicated by arrows. Reference numeral 12 designates a cassette entry side guide pin that regulates the running height of the magnetic tape 3, like the cassette exit side guide pin 4. 13 is a supply reel,
Reference numeral 14 designates a gear that rotates together with the supply reel 13 and allows the supply reel to receive rotation transmission during tape rewinding, etc., and 15 represents a cylindrical portion that rotates together with the supply reel. 1B is a band brake that is wound around the cylindrical portion 15 of the supply reel 13 to apply appropriate braking to the supply reel to control the tension of the magnetic tape 3 to be almost constant; 17 is connected to one end of the band brake 16; Control lever for controlling the brake 18
is the pivot point of the control lever 17. The control lever 17 receives the movement of a tensilon pin (not shown) for detecting the tape tension of the magnetic tape 3 by a lever or the like (not shown) having a tensilon pin erected thereon.

19 is a fixing member for fixing the other end of the band brake 16. Reference numeral 20 designates a brake lever for the supply reel, and a brake member 21 made of synthetic leather or the like is fixed to the tip, rotates around a pivot point 22, and the brake member 21 at the tip is pressed into contact with the cylindrical portion 15 of the supply reel. Alternatively, by separating the supply reel 13, the supply reel 13 can be stopped or rotated freely. 23 is a pick-up reel, 2
Reference numeral 4 designates a gear that rotates together with the pick-up reel and receives rotational transmission to the pick-up reel during tape feeding, etc., and 25 represents a cylindrical portion that rotates together with the pick-up reel. Reference numeral 26 is a brake lever for the pickup reel, to which a brake member 27 made of synthetic leather or the like is fixed, similar to the brake lever 20 for the supply reel. The rotational fulcrum 28 of the brake member 27 and the pickup brake lever 26 and the brake member 21 and rotational fulcrum 22 for the supply reel are located at a bisecting point C of the line B connecting the centers of the supply reel 13 and the pickup reel 23. It is located almost symmetrically to Therefore, the line connecting the centers of the rotation supports 22 and 28 is approximately parallel to the line B connecting the centers of the supply reel 13 and the pick-up reel 23.

Reference numeral 29 denotes a brake spring that applies rotational force to the brake levers 22, 26 for the supply and pick-up reels, and connects the brake members 21, 27 to the cylindrical portion 15 of the supply reel, respectively.
and comes into pressure contact with the cylindrical portion 25 of the pick-up reel. This pressure contact action applies brakes to both the supply and pick-up reels to stop them. 30 is a brake lever 20 for the supply reel and a brake lever 26 for the pick-up reel.
This is an engaging part for interlocking the . A cam gear 34 has a cam groove and drives levers (not shown) necessary for mode switching, such as the brake lever 20 and 28. 31 is an electromagnetic adsorption piece fixed to a brake lever for a pickup reel, and 32 is an electromagnetic magnet main body fixed to a chassis 33. By adhering to the electromagnetic magnet main body 32, the electromagnetic adsorption piece 31 moves the pick-up reel brake lever 26 and the supply reel brake lever 20 linked thereto to the position where the brake member 21° 27 is separated from the reel cylindrical portion 15.25. By holding the supply reel 13. The pick-up reel 23 is rotatable to enable operations such as tape feeding and rewinding. This electromagnetic magnet mechanism makes it possible to perform tape fast-forwarding, rewinding, and stopping operations in a short period of time.

FIG. 5 shows a cross section of the main part near the supply reel of the conventional example. In FIG. 5, the brake member 21 and the band brake 16 are arranged around the cylindrical portion 15 of the supply reel 13 at different heights.

Problems to be Solved by the Invention However, in the above configuration, the supply reel 1
The height of the cylindrical portion 15 of No. 3 is required for the band brake and the reel brake for stopping the reel, and the height of the cylindrical portion becomes high, making it difficult to make the device thinner. In addition, brake lever 2 for supply reel
Since the brake lever 26 for the brake spring 29 and the brake spring 29, etc. The parts that make up the device protrude from the cassette 2, etc., and the device becomes long in the vertical direction, which poses an issue in downsizing the device. Also,
The brake for stopping the reel needs to be set in such a way that abnormal operations such as slack in the tape or increase in tension do not occur, especially when stopping the tape from high-speed fast forwarding and rewinding, so the brake arrangement shown in the conventional example is significantly changed. That was difficult.

The present invention solves the above-mentioned conventional problems, and aims to provide a thin and compact recording/reproducing device in which the height of the cylindrical portion of the supply reel can be reduced and the brake levers do not protrude from the cassette. shall be.

Means for Solving the Problems In order to solve the above problems, the recording and reproducing apparatus of the present invention includes:
The line that connects the centers of the rotational fulcrums of both supply and pick-up brake levers to stop the reel is made oblique to the line that connects the centers of both supply and pick-up reels, and the tension of the tape is controlled almost constant. In order to do this, a supply brake member was placed at a height between the band brake wound around the cylindrical portion of the supply reel and the track. Also, both supply and take-up brakes are supplied.

The brake configuration has a road-to-road angular relationship with respect to both pick-up reels.

action The present invention has the configuration described above.

By separating both supply brake members from the reel cylindrical portion, the reel can be freely rotated to perform high-speed feeding and rewinding of the tape, as well as constant-speed feeding and constant-speed rewinding during recording and reproduction. Further, the rotation of both reels is stopped by bringing both the pick-up and supply brake members into pressure contact with the cylindrical portions of both reels. The band brake wraps around the cylindrical portion of the supply reel during recording and playback, and applies appropriate braking to the supply reel, thereby controlling the tension of the magnetic tape at a nearly constant level.

Example FIG. 1 is a plan view showing one embodiment of the present invention.

FIG. 2 is a sectional view of the vicinity of the supply reel and pick-up reel in FIG. 1.

In FIG. 1, the same reference numerals are used for the same parts as in FIG. 4, so redundant explanation will be omitted.

As shown in FIGS. 1 and 2, a line connecting the centers of the rotation fulcrum 22 of the supply reel brake lever 20 and the rotation fulcrum 28 of the pickup brake lever 26 is connected to the supply reel 13 and the pickup reel 23. Line B connecting the centers of
The supply reel brake member 21 is disposed at an opening of the band brake 16 at an angle to the band brake 16. The band brake 16 and the brake member 21 are arranged at approximately the same height as shown in FIG.
The cylindrical portion 15 of No. 3 is shared by both brakes.

FIG. 3 is a detailed partial plan view of the vicinity of both reels in FIG. 1. Cylindrical portion 1 of supply reel 13 shown in FIG.
The radius aS of No. 5 is the same as the radius aT of the cylindrical portion 25 of the pick-up reel 23. Further, the center-to-center distance bs between the supply reel 13 and the rotation fulcrum 22 and the center-to-center distance bT between the pick-up reel 23 and the rotation fulcrum 28 are the same. The center of the supply reel 13, the contact point between the brake member 21 and the cylindrical portion 15, the biting angle θS of the supply side brake formed at the rotation fulcrum 22, the center of the pick-up reel 23, the contact point between the brake member 27 and the cylindrical portion 25, and , the bite angle θT of the pick-up side brake formed at the rotation fulcrum 28 is the same. Therefore, both the supply and take-up brakes differ in terms of braking timing, braking force, etc. from the conventional brakes.

The operation of the recording/reproducing apparatus of this embodiment configured as described above will be explained below.

During recording/reproduction in which the magnetic tape 3 wound around the rotating cylinder 1 is driven at a constant speed by the capstan 10 and the pinch roller 11, the supply brake member 21 and the pick-up brake member 27 are separated from the reel cylindrical portion. position, and only the band brake 16 is connected to the cylindrical part 15.
By winding the magnetic tape around the supply reel and applying appropriate braking to the supply reel, the tape tension/yellow of the magnetic tape 3 is controlled to be approximately constant. To separate the brake members 21 and 27, the engaging portion 30 rotates the brake lever 20 using the cam gear 34, and the brake lever 26 is rotated until the adsorption piece 31 formed on the brake lever 26 comes into contact with the electromagnetic magnet body 32. It also rotates in conjunction. After the suction piece 31 comes into contact with the suction piece 31, the suction piece 31
is attracted and held by the electromagnetic magnet main body 32, and not only the brake lever 26 but also the brake lever 20 are held in a rotated state by the engaging portion 30. Further, the cam gear 34 is returned to its pre-rotation state after being sucked. At the position where the pinch roller 11 is separated from the capstan 10,
During high-speed rewinding or rewinding in which the tape is run by only the rotation of both the supply and pick-up reels, the brake members 21 and 27 move away from the reel cylindrical portion, and
The band brake 16 is also separated from the reel cylinder section 15.

Also, when rewinding at high speed or stopping from rewinding,
The brake members 21 and 27, which had been held apart by the adsorption pieces 31 adsorbing to the electromagnetic magnet main body 32, stop attracting the electromagnetic magnet main body 32, and are pressed against the reel cylindrical parts 15 and 25 by the brake spring 29, and both Stop reel rotation.

As described above, according to this embodiment, the line connecting the centers of the pivot points of both the supply and pick-up brake levers for stopping the reel is inclined with respect to the line connecting the centers of the supply and pick-up reels. At the same time, in order to control the tape tension almost constant, a supply brake member is placed at the same height as the band brake at the opening of the band brake wound around the cylindrical part of the supply reel. Since the cylindrical portion of the reel can be shared by both brakes, the cylindrical portion can be shortened, and
Furthermore, a compact brake mechanism can be constructed in which the brake levers do not protrude from the cassette. In addition, supply,
Since the brake configuration is exactly the same for both pick-up reels, it is possible to use the same brake mechanism as a conventional reel brake, so reliability can be maintained.

Effects of the Invention As described above, the present invention makes the line connecting the centers of the pivot points of both the supply and pick-up brake levers for stopping the reel inclined with respect to the line connecting the centers of the supply and pick-up reels. In addition, in order to control the tension of the tape almost constant, a supply brake member is placed at the same height as the band brake at the opening of the band brake wound around the cylindrical part of the supply reel. Since the cylindrical part of the supply reel can be used in common with both brakes, the cylindrical part can be shortened, and a compact brake mechanism can be constructed in which the brake levers do not protrude from the cassette, allowing equipment to be made thinner and smaller. It becomes easy. Also supply.

Since the brake design is exactly the same for both pick-up reels, it is possible to use the same brake design as a conventional reel brake, and the reliability can be maintained as before, which has a great practical effect.

[Brief explanation of the drawing]

1 is a plan view of essential parts of a recording/reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view of the vicinity of the supply reel 13 and pick-up reel 2 in FIG. 1, and FIG. 3 is a plan view of both reels in FIG. 1. FIG. 4 is a plan view of a main part of a recording/reproducing apparatus in a conventional embodiment, and FIG. 5 is a sectional view of a main part near a supply reel in a conventional example. ■... Rotating cylinder, 3... Magnetic tape, 13
...Supply reel, 15.25...Cylindrical part,
16...Band brake, 20...Brake lever for supply reel 21.27...Brake member, 23...Tick-up reel, 26...Brake lever for pick-up Name of agent Patent attorney Awano 1 Takashi Haka 1 person/-One revolution shifter 2-・-p-tto 16° point 'flare π°--to the flake for Budera sole-2/, 23...
-Brake parts car Brake torque r<-15-F for Liguaraf 2
l h part 16'' - no. 2f - frame material 2θ ・- frame material for full sole 2.3 rotation resonator 2.3 guide material 2

Claims (1)

[Claims] Make the line connecting the center of the rotation support of both the supply and take-up brake levers for stopping the reel oblique to the line connecting the centers of both the supply and take-up reels, and wind it around the cylindrical part of the supply reel. A recording/reproducing device characterized in that a brake member for stopping a supply reel is arranged at approximately the same height as a bent band brake.