JPH01128257A - Tape loader - Google Patents

Abstract

PURPOSE:To reduce the number of parts and to simplify a loading mechanism by transmitting a rotating force of a rotating gear to a slider fitted with a guide roller by means of one spring member. CONSTITUTION:An axis 22 for the gear 21 on the right side of the loading mechanism is fixed with one end of a S-shaped spring 24, while the other end is wound around a guide pole 23 and a pin 28 of the slider projectionally provided with the guide roller 27; the similar constitution on the left side as well. Now, when the gear 21 is rotated anticlockwise, the S-shaped spring 24 is turned also in the same direction so as to move the slider 25 along a guide groove 29. Then, after the loading is over, the slider 25 is still energized by the S- shaped spring 24 toward the groove to bring a tape into press contact with a cylinder 11. For this, the conventional two-link mechanism is replaced with the only one spring 24, and hence the simplification of the mechanism can be contrived by reducing the number of parts accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a tape loading device for a magnetic recording/reproducing device such as a cassette video tape recorder or a digital audio tape recorder.

(Prior Art) In recent years, there has been an increasing demand for miniaturization of cassette tape recorders, and there is also a trend toward simpler and thinner mechanisms.

FIG. 5 shows an example of a conventional tape loading device,
This is the state after loading. In the figure, 41 is a rotary cylinder into which a magnetic head is removed, 42 is a cassette case, and 43 is a tape. Further, 51 is a capstan, 52 is a pinch roller, 53 is a guide ball, 54 is a tension ball, 55 is a guide ball, and the pinch roller 52. Guide roller 53, tension ball 5
4. The guy roller 55 is a member that moves in a predetermined direction to pull out the tape 43 from the inside of the cullet case 42 together with a loading mechanism that will be described later during the loading operation.

Gear 61 (61a), link 62 (62a>
, 63 (63a > The slider 64 (64a) constitutes a loading mechanism. However, each pair of mechanisms performs the same operation, so the machine 1tF on the right side when viewed from the plane
Only + will be explained. The gear 61 is a spur gear, and is rotated by a predetermined angle in the direction C as shown in FIG. 5 in an unloading state (not shown). And cassette case 42
Pins 66 and 67 are respectively provided at eccentric positions on the surface facing the. Further, the gear 61 supports one end of the link 62 and holds a pressurized spring 65 at its support point. The pressurizing spring 65 has one end in contact with a stopper 68 protruding from the link 68, and the other end in contact with a pin 67.

As a result, the pin 67 presses the negative end of the pressurizing spring 65.

On the other hand, the link 63 is pivotally connected to the link 62, and has a slider 64 at the end that is not pivotally connected. A guide roller 69 and a ball 70 are provided protruding from the slider 64.

In the loading device configured as described above, in the unloading state, the gear 61 rotates by a predetermined angle in the direction of arrow C, and each link 61, 63, . and 62a.

63a faces inward at an acute angle.

Then, when the cassette 42 is installed, the gear 61 rotates clockwise from the above-mentioned unloading state, and the link 6
2 in six directions to rotate the link 63 into the rotating cylinder 41.
and the ball 51. As a result, the guide ball 69 pulls out the tape 43 from the cassette 42 and guides it to the rotating cylinder 41. When the gear 61 rotates to a predetermined angle, the pin 67 presses one end of the pressurizing spring 65, which applies force to the other end of the pressurizing spring 65, and the force of the pressurizing spring 65 causes the link 62 (62a ) is urged in the direction of arrow A (B) in the figure. For this reason, link 63
A force directed outward in the longitudinal direction is applied to (63a) to press the tape 43 to the outlet side (input side) of the cylinder 41.

However, conventional tape loading devices have a large number of parts and an increased number of link points. This has the disadvantage that the height of the mechanism increases.

In addition, for the movement of the slider 64, a guide groove (shown path) is provided.
However, in the above configuration, the guide groove had to be formed in an arc shape.

As a prior art, Japanese Utility Model Application No. 62-101137 discloses the back of a bending/extending link mechanism consisting of two links.

Although one link has been disclosed in which one link is made of an elastic member and a slider is attached thereto, the height of the slide mechanism cannot be sufficiently reduced because it is a bending/extending link mechanism.

(Problems to be Solved by the Invention) The conventional loading device has many link points, which complicates the mechanism. In particular, the height of the slide mechanism for moving the slider 64 becomes large.

It is an object of the present invention to provide a tape loading device that eliminates the above-mentioned problems, has a small number of parts, and has a slide mechanism that is small in height.

[Structure of the Invention] (Means for Solving the Problems) A tape low γ ink device of a cassette type magnetic recording and reproducing device includes a slider that supports a guide roller located inside the tape when loading the cassette, and a slider that supports the guide roller located inside the tape when loading the cassette. a rotating member that detects loading of the cassette and rotates in a predetermined direction; further, one end of the rotating member is attached to a rotating shaft portion, and the other end holds the slider; The present invention is characterized in that an elastic member is provided that transmits the rotational force of the gear to the slider to perform loading, and also biases the slider in a predetermined direction even after loading is completed.

(Function) According to the present invention, the rotational force of the rotating gear is transmitted by one elastic member instead of two link mechanisms, so the mechanism is simplified.

(Example) The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 is a plan view showing an embodiment of a tape loading device according to the present invention, and FIG. 2 is a perspective view showing the structure of FIG. 1 in detail.

FIG. 1 shows the state before loading, and 11 is a rotating cylinder, 12 is a cassette case, 13 is a tape, and 14 is a capstan. 21 corresponds to the gear 61 shown in FIG. 5, and the gear 21 can be rotated around the shaft 22 by a predetermined driving means. The gear 21 is provided with a stop pin 23 facing the cassette case 12, and one end of an elastically deformable figure 8 spring 24 is fixed to the shaft 22.

On the other hand, 25 is a slider, and as in FIG.
A pin 28 is formed on the opposite surface. The figure 8 spring 2 is attached to this pin 28.
The other end of 4 is wound. With this configuration, the slider 25 is supported by the other end of the figure 8 spring 24 and is moved as the gear 21 rotates counterclockwise.

FIG. 2 shows the configuration of the gear 21, the figure 8 spring 24, and the slider 25. The guide roller 27 is supported by the slider 25 and also extends in the same direction as the pin 28, and this extended end 27' fits into a guide groove 29 shown by a two-dot chain line. There is.

The configuration in which the gear 21 is centered constitutes a loading mechanism for the tape (outlet side) unwound from the rotary cylinder 11. The loading mechanism for the tape (inlet side) wound into the rotating cylinder 11 is also similar to the above, and includes a gear 31, a figure 8 spring 34. It is composed of a slider 35 and a guide groove 39. The gear 31 has a shaft 32 and a stop pin 33, and the slider 35 has a guide ball 36. A guide roller 37 and a pin 38 are formed, and the lower end (path shown) of the guide roller 37 is connected to the guide groove 3.
It is designed to be guided by 9.

The present embodiment is constructed as described above, and its operation will now be explained with reference to FIGS. 3 and 4. Incidentally, FIG. 3 shows the operation during loading, and FIG. 4 shows the state when loading is completed. Furthermore, in FIG. 4, 20 is a guide ball, 30 is a capstan, and 40 is a tension ball.

First, when the cassette 12 is loaded, a drive means such as a motor (not shown) is operated in response to a command from a detection means for detecting this. As a result, in the state shown in FIG. 1, the gear 21 rotates counterclockwise and the gear 31 rotates clockwise. The operation on the gear 21 side will be described below. As the gear 21 rotates, a force is applied that rotates the figure 8 spring 24 in the counterclockwise direction about lN122. For this reason, 8
The spring 24 rotates in the same direction, and the guide roller 2
7 moves along the guide groove 29 to move the slider 25.

Furthermore, when the gear 21 rotates, the figure 8 spring 24 tries to bend to make the dogleg shape smaller due to its rotational force.
The figure 8 spring 24 is 1.8 because the slider support part is rotatable.
Before the spring 24 bends significantly, the guide roller 27 rotates and the slider 25 changes as shown in FIG. Since the gear 21 is rotating continuously, the guide roller 27
The lower end portion 27' further advances through the guide groove 29 and reaches the end of the guide groove 29. In addition, guide roller 2
7 moves from the state shown in Fig. 3 to the state shown in Fig. 4, the slider 2
Posture 5 will be gradually corrected.

As a result, the tape 13 is pulled out of the cassette case 12 and wound around the rotating cylinder 11. Note that the operation on the gear 31 side is also the same.

Further, after the loading is completed, the rotational operation of the gear 21 is stopped, but the stopping position is set at a position where a force is applied to narrow the dogleg angle shown in FIG. Therefore, in the state shown in FIG. 4, the figure 8 spring 24 can bias the slider 25 in the direction of the guide groove 29 and press the tape 13 against the rotating cylinder 11 with a predetermined tension (pressurizing effect). ).

In this way, in this embodiment, the conventional link portion can be realized with a single figure-eight spring, and the configuration of the loading mechanism is simplified. Further, in this embodiment, when the elastic member 2 is moved on the slider by the rotational force of the rotating member, the slider support portion rotates with respect to the slider, so the elastic member is hardly deformed during the loading process and its elasticity does not deteriorate. This results in
This increases the reliability of the tape pressure force after loading.

Further, the guide groove 29 can be formed in a straight line, which has the advantage of facilitating processing of the sea palm.

-10- It should be noted that the above embodiment is just an example, and the shape of the S-shaped spring 24, for example, is not limited to that in the embodiment.

[Effects of the Invention] As explained above, according to the present invention, there is an effect that the spring member is highly reliable and has a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of a tape loading device according to the present invention, FIG. 2 is a perspective view detailing the embodiment shown in FIG. 1, and FIGS. A plan view for explaining the operation of the embodiment, and FIG. 5 is a plan view showing an example of a conventional loading device. 11...Rotating cylinder, 12...Power case,
13...Tape, 21...Gear, 22...Shaft, 2
4...S-shaped spring, 25...Slider, 26...
Guide roller, 28...pin, 29...guide groove. Agent Patent Attorney Noriyoshi Chika
Hiroshi Uji Figure 5

Claims (1)

[Scope of Claims] A tape loading device that winds a tape stored in a cassette around a rotating cylinder to which a magnetic head is attached while loading the cassette; a guide means for guiding the slider to a loading position; a rotating member that detects loading of a cassette and rotates in a predetermined direction; and an elastically deformable member, one end of which is attached to the rotating shaft of the rotating member, and the other end of the rotating member that is elastically deformable. Hold said slider in
A tape loading device comprising: an elastic member that transmits the rotational force of the gear to the slider, moves the slider in a predetermined direction for loading, and urges the slider in a predetermined direction even after loading is completed. Device.