JPS628356A - Recording or playback device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a recording or reproducing apparatus that includes means for recording or reproducing by bringing a record carrier and a rotatable drum close to each other.

(Prior Art) The positional relationship between the rotatable drum and the cassette in a conventional magnetic recording or reproducing device is determined so that the drum 8 and the tape T in the cassette z do not come into contact with each other, as shown in FIG. .

(Problems to be Solved by the Invention) By the way, as long as the arrangement shown in FIG. 6 is used, the depth dimension of the device is fixed and it is impossible to reduce the depth dimension.

Therefore, an arrangement may be considered in which the drum 8 fits into the opening of the cassette 2, as shown in FIG. If such an arrangement can be realized, the depth dimension of the apparatus can be reduced considerably, which, in combination with the reduction in the diameter of the drum, is advantageous in reducing the size and weight of the entire apparatus. In order to insert the drum 8 into the opening of the cassette 2 as described above, it is necessary to prevent the tape T from hitting the drum 8 when loading or unloading the cassette. In this case, either one of the drum 8 and the cassette 2 may be moved relatively, or a tape loop may be created so that the tape T does not hit the drum 8. Components with the same reference numerals as in FIGS. 1 and 2 described below basically have the same configuration and function as these, so their explanation will be given in conjunction with FIGS. 1 and 2. The explanation will be omitted here.

According to the present invention, the record carrier is pushed into the cassette so that the record carrier does not hit the rotary drum when loading or unloading the cassette, and the tension of the record carrier during recording or playback is detected using a small number of parts. The purpose is to provide a recording or reproducing device that can perform the following functions.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the recording or reproducing apparatus of the present invention stores the record carrier inside the cassette so that the record carrier does not hit the rotatable drum when loading or unloading the cassette. The guide member is configured to be moved to a position where the tension of the record carrier can be detected during recording or reproduction.

(Function) According to the present invention, based on the above structure, when loading or unloading the record carrier, the guide member pushes the record carrier into the cassette so that the record carrier does not hit the rotatable drum, Alternatively, during reproduction, the guide member moves to a position where it can detect the tensigon of the record carrier.

(Embodiment) An embodiment of the recording or reproducing apparatus of the present invention will be described below with reference to FIGS. 1 to 5. The following description will be made in the order of the structure of the embodiment of the recording or reproducing apparatus of the present invention, the guide member moving means in the embodiment of the present invention, and the operation of the embodiment of the present invention for an example using a tape-shaped record carrier. Note that the present invention can also be applied to a recording or reproducing device using a wire-shaped record carrier.

(Configuration of embodiment of recording or reproducing device of this invention) (First
Figures 2A to 2C show cross-sections of an embodiment of the invention for realizing the tape loop of Figure 7 and for locating a rotatable drum within the cassette opening. The schematic drawings and FIGS. 1(A) and 1(B) are also plan views showing the positional relationship between the cassette and the guides.

In FIGS. 1 and 2, 1 is a cassette holder, 2 is a cassette, 3 is a lid of the cassette 2, and 4 is a reel holder. Inside the reel holder 4, there is a reel stand 5, and a reel lock release inside the cassette. guides 9 and 10 for pulling out the magnetic tape T as a recording carrier and winding it around the drum 8, and guides 16A and 16B for pushing the tape into the opening of the cassette 2. Reference numeral 7 denotes a main body of the apparatus, in which in addition to the rotatable drum 8, rails (not shown) for tape pull-out guides 9, 10, circuit boards (not shown), etc. are installed.

11.12 is a guide for forming a tape path so that the tape T does not come into contact with the boss (13.14) in the cassette 2 when loading is completed; 15 is a pinch roller; 17
17a is the arm on which the guide 16A is erected, 17a is its rotation center axis, and R1 and R2 are the supply side and take-up side reels on which the tape T is wound, respectively.

FIG. 2(A) shows a state in which cassette 2 is placed in cassette holder L. When cassette holder 1 is pushed down from this state, a cassette lid opening member (not shown) comes into contact with cassette M3, opens it, and pulls out the tape. Guides such as the guide 9 enter the opening of the cassette 2, and the reel lock in the cassette 2 is released by the bottle 6, so that the reel holder (not shown) becomes free. FIG. 1(A) shows the positional relationship between the cassette 2 and each guide in the above state.
Located outside.

From the above state, the guides 16A and 16B move in the directions of arrows A and B to form a tape bus on the drum 8 in which the tape T does not occupy. This state is shown in FIG. 2(B), and when the reel holder 4 is pushed down from this point, it becomes the state shown in FIG. 2(C), and loading of the cassette 2 is completed. FIG. 1(B) shows the positional relationship between the cassette 2 and the guides in this state.

Loading starts from the state shown in FIG. 1(B),
First, the push-in guides 16A and 16B are moved in the direction of arrow C, respectively.
Then the guides 11 and 12 move in the direction of arrows E and F, respectively, and the guides 9 and 10 move in the direction of arrows G and H, respectively.
Move in the direction to complete loading. Guide 16A
When loading is completed, it becomes one of the guide posts during normal running, and is also configured to act as a tape tension detection guide as an embodiment of the present invention. The details will be described later with reference to FIGS. 3 to 5.

(Guide member moving means in the embodiment of this invention) (FIGS. 3 to 5) FIGS. 3 and 4 are plane views of a specific example of the mechanism for moving the guide 16A in the embodiment of FIG. 1, respectively. The reference numeral 17 in FIG. 2 is an arm with a guide 16A installed at one end, as described above, and the shaft 18 installed on the arm has a sleeve 20 press-fitted into the base 19.
Rotation is possible by fitting the Arm 1
A magnet 21 is attached to the other end of 7.

A lever 22 is rotatably held around the sleeve 20 and urged counterclockwise by a spring 23. A spring hook 24 and a stopper pin 25 are installed on the lever 22, and a spring 26 is hooked between the arm 17 and the spring hook 24 to bias the arm 17 clockwise. Rotation of 17 is restricted by a stopper 25. Further, the rotation of the lever 22 in the counterclockwise direction is restricted by the arm 17 coming into contact with a bin 28 set up on the gear 27.

Reference numeral 31 denotes an arm, which is rotatably held by a shaft 32, and a shaft 33 is installed at one end of the arm, and a gear 30 is fitted and held at one end of the arm. Further, at the other end, a bottle 34 is planted downward, and is engaged with a cam groove 35a formed in the gear 35. The gear 35 meshes with a gear 36 press-fitted onto the shaft of a drive source 29 such as a motor, and the gear 30 meshes with a gear 36 press-fitted onto the shaft of the drive source 29 via a gear 37 . Note that 38 (FIG. 5) is a loading gear, and 39 is a pin that restricts the clockwise rotation of the lever 22.

(Function of the embodiment of the recording or reproducing device of this invention) (Part 3
(Figs. to 5) Next, regarding the operation of the embodiment of the present invention described above, referring mainly to Figs. A mode in which the tape is pushed in and moved to a position where tape tension is detected during recording or playback will be explained.

FIG. 3 shows a state in which the tape T is pushed into the inside of the cassette 2, and loading is started from this state. First, the drive source 29 operates and the gear 27 rotates in the direction of arrow 1. Along with this, the arm 17 and the lever 22 are moved by the spring 23.
It is pulled and rotates counterclockwise. Eventually lever 2
2 comes into contact with the bin 39, and the guide 16A moves to a specified position, but the gear 27 continues to rotate, creating a gap between the arm 17 and the bin 28, as shown in FIG. In this state, the magnet 21 faces the Hall element 32.

When the loading is completed and the tape T runs for recording or playback, the guide IRA 6 ÷ ÷ n soso brittle... becomes a small Zeno, and the arm 17 swings by the tension of the tape T, and the magnet By changing the positional relationship between Hall element 21 and Hall element 32, the torque of a reel motor (not shown) is controlled in accordance with the output of Hall element 32, and tension control is performed.

Even after the arm 17 reaches the specified position, the drive source 29 continues to rotate, and the engagement between the cam groove 35a and the pin 34 is caused by the gear 35.
By moving toward the outer circumference of the arm 31, the arm 31 rotates counterclockwise. and.

Gear 30 separates from gear 27 and loads gear 38
and start loading.

During unloading, the drive source 29 rotates in the opposite direction to that described above, and unloading is performed by the engagement between the gear 30 and the loading gear 38, but the engagement between the bin 34 and the cam groove 35a moves toward the center of the gear 35. As the gear 30 moves, the gear 30 separates from the loading gear 38 and transfers to the gear 2.
7, and the gear 27 rotates in the opposite direction to the third gear. As a result, the lever 22 rotates clockwise against the bias of the spring 23, and the arm 17 is pulled by the spring 26 and rotates clockwise, comes into contact with the stopper/pa 25, and stops.
The guide 16A shown in FIG. 3 returns to the state in which the tape T is pushed into the cassette 2.

(Effects of the Invention) As described above, according to the present invention, the rotatable drum is equipped with a guide member that pushes the record carrier into the cassette so that the record carrier does not hit the rotatable drum when loading or unloading the cassette. The guide member can be arranged to fit into the opening of the cassette, reducing the overall depth of the device, and the guide member is also used to detect the tension of the record carrier during recording or playback. Tension detection can be performed with a small number of parts.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the recording or reproducing device of the present invention, and Fig. 1 (A) shows the positional relationship between the cassette and guides when the cassette holder into which the cassette is inserted is pushed down into the reel holder. Plan view, the same figure (B) is the same figure (
A plan view showing the positional relationship between the cassette and the guides when the reel holder is further pushed into the device main body from state A). FIG. 2 is a schematic cross-sectional view showing the vertical relationship between the cassette holder and the cassette holder; FIG. C) is a schematic cross-sectional view showing the state in which the reel holder is further pushed into the apparatus main body, FIG. 3 is a plan view showing a specific example of the moving mechanism of the guide member in the embodiment of FIG. 1, and FIG. 5 is an explanatory diagram of the operation of the mechanism shown in FIG. 3, FIG. 6 is a plan view showing the positional relationship between the rotatable drum and the cassette in a conventional recording or reproducing device, and FIG. FIG. 2 is a plan view of a recording or reproducing device arranged such that a rotating drum is located in a cassette opening. Explanation of symbols l: cassette holder, 2: cassette, 4: reel holder, 7: recording or reproducing device main body, 8: rotatable drum, 9.
to: guide for winding the tape as a record carrier around the drum, 11, 12: guide for forming the tape path, 13
, 14: Post in the cassette, 16A, 16B: Guide for pushing the tape into the cassette, 17, 31: Arm,
18: Axis, 19: Base, 21: Magnet, 22 Nilever, 23, 26: Spring, 27, 30, 35° 37
: gear, 29: drive source, 32: Hall element, 34: bottle set on arm 31, 38: loading gear.

Claims (1)

[Scope of Claims] A guide member is provided for pushing the record carrier into the cassette so that the record carrier does not hit the rotatable drum when loading or unloading the cassette, and the guide member controls the tension of the record carrier during recording or playback. recording or playback device configured to be moved to a position where it can be detected.