JPH03222140A - Cassette loader - Google Patents

Abstract

PURPOSE:To hold a cassette with an optimum load by providing a spring supporting member for giving different pressing force to a spring member for holding the cassette on a slider at the time of inserting the cassette, moving the slider and loading the cassette respectively. CONSTITUTION:The cassette 30 is inserted into a slider 6 until it is inserted into a position to be abutted on the stoppers 7a and 7b of the slider 6. At this time, the tips of bends of pressing levers 27a and 27b have their gaps with pressing springs 11a and 11b respectively, and are pressed against a placing surface of the slider 6 by elastic force of the springs 11a and 11b. When the cassette 30 is further inserted into the inside and shifted to its automatic loading operation, it is moved in contact along the inside surface of frames 2a and 2b. Simultaneously, the springs 11a and 11b are pressed by the bends of the other ends of the pressing levers 27a and 27b against the surface side of the cassette 30. By this method, the pressing force is increased, and the cassette 30 is prevented from slipping out of the slider 6 at the time of moving the slider 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cassette loading device for a magnetic recording/reproducing device such as a VTR, and particularly relates to an improvement in a cassette holding/pressing structure.

[Prior Art] FIG. 5 is a plan view of a conventional cassette loading device used in a magnetic recording/reproducing device, and FIG. 6 is a side view thereof.
FIG. 7 is a side sectional view taken along the cutting line ■-■ in FIG. 5. FIG.

Referring to FIGS. 5 to 7, frames 2a and 2b are erected on the surface of chassis 1 at a predetermined interval. The frames 2a and 2b are connected by a top & bottom guide (not shown) and a down guide 5. frame 2a
, 2b has L-shaped guide holes 3as 3bs 4a,
4b is formed.

A slider 6 that places and moves the inserted cassette 3o
has holders 8a, 8b for guiding the sides of the cassette 3o to be inserted, and stoppers 7a, 7b for determining the insertion position of the cassette. Holder 8a of slider 6
, 8b have guide holes 3a formed in the frames 2a, 2b.

3b and the guide shaft 9a19b inserted into the guide hole 4a.
, 4b are formed. These guide shafts 9a, 9b% 10a, 10b are guide holes 3a of the frame 2a.

3b, 4a, and 4b so as to be slidable,
The frame 6 is moved via the guide shaft between the frames 2a and 2.
It is formed along the shape of the guide shafts 3a to 4b of b. Further, the guide shafts 9a and 9b are connected to the other guide shafts 10a and 10.
b, and its tips protrude from the outer surfaces of the frames 2a, 2b. Holders 8a, 8 of slider 6
Presser springs lla and llb are provided at the upper part of b. The presser springs lla and llb press and fix the inserted cassette 30 to the surface of the slider 6.

A drive gear 13 is provided on the outer surface of each frame 2a, 2b.
a and 13b are rotatably supported.

The drive gears 13a and 13b have U-shaped engagement portions 12 having grooves that engage with the guide shafts 9a and 9b of the slider 6.
a and 12b are integrally attached. Furthermore, timing gears 14a and 14b that mesh with drive gears 13a and 13b are rotatably supported on the frames 2as and 2b. Both timing gears 14a, 14b are fixed to both ends of a main shaft 15 spanned between frames 2a12b, and rotate synchronously.

A worm wheel 16 is concentrically fixed to the drive gear 13a located on the right side with respect to the insertion direction of the cassette 30, and a worm gear 17 meshes with the worm wheel 16. The worm gear 17 is connected to a worm shaft 18 having a pulley 19 attached to the other end.

The pulley 19 is operatively connected to a loading motor (not shown) via a belt.

On the right side frame 2a, there is a switch lever 20 (not shown) that is rotated by the rotation of the drive gear 13a as the cassette 30 is pushed into the slider 6, and a switch lever 20 (not shown) that is opened and closed by the rotation of the switch lever 20 and operates the loading motor. A loading switch 21 (not shown) for driving, an open lever 22 for rotating the guard panel (front cover) of the cassette 30, and the like are provided.

Further, the chassis 1 includes a pair of positioning bins 23a and 2 for positioning the cassette 30 at a regular loading position.
3b, and a pair of cassette stays 24a, 24b are provided upright. The positioning pins 23 a s 23 b engage with reference holes 25 a and 25 b at the bottom of the cassette 30 , and the cassette stays 24 as 24 b support the bottom of the cassette 30 .

Next, the structure of the cassette presser springs 11a and llb provided on the slider 6 will be explained in detail. 8A is a partial enlarged plan view of the slider 6, and FIG. 8B is a partial enlarged plan view of the slider 6.
FIG. Referring to both figures, presser spring l
la is composed of a plate-shaped spring material bent into a V-shape so as to be pressed against the upper surface of the cassette 30. One end thereof is fixed to the holder 8a of the slider, and the other end is left free.

Furthermore, the operation of the cassette loading device will be explained using FIGS. 9A to 9C. 9A to 9C are operation explanatory diagrams schematically showing the operation of the cassette loading device.

First, referring to FIG. 9A, move the cassette 30 onto the slider 6.
When inserted into the cassette 30, the presser spring l
la and llb (not shown) are pressed against the slider 6. The cassette 30 is moved to the stoppers 7a and 7 of the slider 6.
The slider 6 is initially moved by inserting it until it contacts point b and pushing it further. Then, the guide shafts 9a, 9b provided on the slider 6 move along the L-shaped guide holes 3a, 3b, and the guide shafts 9a, 9b move along the L-shaped guide holes 3a, 3b.
U-shaped engagement surfaces 12a and 12b that engage with 9b rotate,
Rotational torque is applied to drive gears 13a and 13b. The worm wheel 16 is not rotated because the worm gear 17 is engaged with it, but the right drive gear 1 is connected to the worm wheel 16 via a double-acting mechanism.
3a is rotated while extending the double-acting mechanism by the given rotational torque. When opening, the drive gear 13b is also rotated.

Referring to FIG. 9B, the rotation of the right drive gear 13a rotates the switch lever 2o, thereby turning on the loading switch 21 and starting the automatic loading operation. That is, a loading motor (not shown) is driven, and the pulley 19 is rotated via a belt.
The worm wheel 17 is rotated via the worm shaft 18 and the worm gear 17, and the right drive gear 13a, to which rotational torque is applied from the worm wheel 16, is driven and rotated. Right drive gear 13a
When rotated, the left drive gear 13b is rotated in synchronization with the right drive gear 13a via the timing gear 14a, main shaft 15, and timing gear 14b. When both drive gears 13a, 13b rotate synchronously, the left and right U-shaped engaging portions 12a, 12b also rotate,
The rotation moves the guide shafts 9a and 9b, and the slider 6 holding the cassette 30 moves horizontally toward the back side. This movement of the slider 6 is carried out by guide shafts 9a, 9
b is guided by the guide holes 3a, 3b, and the guide shaft 10a,
10b is guided by the guide hole 4a14b.

Further, referring to FIG. 9C, after the slider 6 moves horizontally along an L-shaped path, it shifts to a vertical movement operation. In the process of moving the slider 6 from horizontal to vertical movement, the guard panel on the front side of the cassette 30 is rotated by the open lever 22. Note that the open lever 22 is pushed by the holder 8a and retreated to the rear side while rotating the guard panel.

In the final process of vertical movement of the slider 6, the slider 6
The reference holes 25a and 25b of the cassette 30 held in the cassette 30 are fitted into the positioning pins 23a and 23b, and the bottom of the cassette 30 is pointed by the cassette stay 24a and 124b,
As a result, the cassette 30 is loaded into the normal loading position.

Note that the ejecting operation of the cassette 30 is performed by an operation opposite to that of loading.

[Problems to be Solved by the Invention] In the above-described cassette loading operation, the presser springs lla and llb cause the cassette 3o to shift from a predetermined position on the slider 6 while the slider 6 moves from horizontal to vertical. The cassette 30 is pressed down so that it is placed without any problems. Therefore, in order to prevent the cassette 30 from shifting, a strong pressing force from the presser springs lla and llb is required. However, on the contrary, the presser spring l1g, 1
If the pressing force of 1b is set to be large, the resistance will be large when inserting the cassette 3o into the slider 6 or when removing the cassette 30 from the slider 6.
A problem arose in that the insertion and removal operations became slow.

Therefore, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a cassette loading device equipped with a mechanism for holding a cassette with an optimal load during cassette loading/unloading operations. do.

[Means for Solving the Problems] A cassette loading device according to the present invention has a mounting surface, and places an inserted cassette on the mounting surface and moves it from a cassette insertion position to a predetermined cassette loading position. The slider includes a slider, a frame having a guide portion that guides the movement of the slider, and a spring member that is attached to the slider and presses a cassette inserted into the slider against a mounting surface of the slider. Additionally, operably attached to the frame,
When the slider is in the cassette insertion position, the spring member is allowed to elastically deform, and when the slider is in either the moving position or the loading position, the spring member is pressed against the cassette to increase the pressing force against the cassette. and a supporting spring support member.

[The active spring support member is in a position that allows free deformation of the spring member when the cassette is in the insertion position.

Therefore, the cassette can be inserted into or removed from the slider by the optimal elastic pressing force of the spring member in its free state.

Further, when the cassette is placed on the slider and is in either the moving position or the loading position, the spring support member further presses the spring member. This further increases the pressing force with which the spring member presses the cassette, making it possible to prevent the cassette from shifting relative to the slider when the slider moves.

[Example code] An embodiment of the present invention will be explained below.

FIG. 1 is a plan structural view of a cassette loading device according to the present invention, and FIG. 2 is a side view thereof.

Referring to both figures, the feature of the present invention is that the presser mechanism for press-fixing the cassette 30 to the slider 6 has been improved. The other structures are the same as those of the conventional example shown in FIGS. 5 to 7, so a redundant explanation will be omitted here. On the upper surface of the holders 3a and 8b of the slider 6, presser levers 27a and 27b are provided which are rotatably attached to the presser lever shafts 26a and 26b. Each of the presser levers 27a and 27b has a bent portion at one tip and the other tip. Square holes 28a, 28b are formed in a part of the frames 2a, 2b, and one end of the presser levers 27a, 27b is inserted into the square holes 2'8a, 28b when the cassette 30 is initially inserted. I'm stuck in it. The presser springs 11a111b attached to the holders 8a and 8b of the slider 6 are constructed by bending a plate-shaped spring material into a V-shape. In the state shown in FIG. 1, the surface of the presser spring lla and the bent portion of the presser lever 27a127b are attached in such a manner that a gap is formed between them. Further, the presser springs 11a and llb are selected to have a lower pressing force against the cassette 30 than, for example, the conventional presser springs lla and llb shown in FIG.

Next, the operation of the presser springs lla and llb will be explained. 3A and 3B are diagrams showing the initial insertion state of the cassette 30, and show an enlarged plan view and a side view, respectively.

4A and 4B are views of the slider 6 when it is moving and when the cassette is loaded. FIG. 4A is a partially enlarged plan view thereof, and FIG. 4B is an enlarged side view thereof.

First, referring to FIGS. 3A and 3B, the cassette 30 is inserted into the slider 6, and the stoppers 7a and 7 of the slider 6 are inserted into the slider 6.
It is inserted until it touches b.

At this time, there is a gap between the bent ends of the presser levers 27 a s 27 b and the presser springs lla and llb. Therefore, the cassette 30 is pressed against the mounting surface of the slider 6 by the elastic force of the presser springs 11a and llb, which have only one end fixed.

Furthermore, with reference to FIGS. 4A and 4B, the cassette 30
is inserted further to the back side and transitions to the automatic loading operation (see Figures 9B and 9C), one end of the presser levers 27a and 27b is attached to the frames 2a and 2b as the slider 6 moves.
are expelled from the square holes 28a, 28b of the frame 2a,
It touches and moves along the inner surface of 2b. At the same time, the bent portions at the other ends of the presser levers 27a, 27b come into contact with the free end surfaces of the presser springs 11a, llb, and press the springs 11a, llb toward the front surface of the cassette 30. This increases the pressing force applied to the cassette 30 from the presser springs lla and llb, and can sufficiently prevent the cassette 30 from shifting from the slider 6 when the slider 6 moves.

Note that the ejecting operation is performed by the opposite operation to that described above, but the slider 6 moves in the ejecting direction between the position shown in FIG. 4A and the position shown in FIG. 3A when ejection is completed, and the presser lever 27a127b and other The ends are stoppers 29a and 29 provided inside the frames 2as and 2b.
By coming into contact with b, it is smoothly guided into the square hole 28a.

In this way, in the above embodiment, the presser spring l
Presser lever 27a that moves and comes into contact with la and llb
, 27b has been described with reference to an example in which the abutting portion has a bent portion, but the shape is not limited to this, and a structure in which other protrusions are attached may be used. Also,
Frame 2a.

The square holes 28a and 28b provided in the presser levers 27a and 27b are not particularly limited in shape.
It may be formed as a recess surrounded by a protruding portion that guides the other end.

[Effects of the Invention] As described above, the cassette loading device according to the present invention includes a spring support member that applies different pressing forces to the spring member that holds the cassette on the slider when inserting the cassette and when moving and loading the slider. By providing this, the resistance when inserting the cassette is reduced, and the cassette holding force during the cassette loading operation is increased, thereby realizing a cassette loading device that allows easy attachment and detachment of the cassette and can perform a reliable cassette loading operation. can do.

[Brief explanation of drawings]

FIG. 1 is a plan view of a cassette loading device according to an embodiment of the present invention. 2 is a side view of the cassette loading device shown in FIG. 1; FIG. FIG. 3A is a partial plan view of the cassette loading device when inserting the cassette;
FIG. 3B is a partial side view of FIG. 3A. FIG. 4A is a partial plan structural view of the cassette loading device during a cassette loading operation, and FIG. 4B is a side view of the cassette loading device of FIG. 4A. FIG. 5 is a plan view of a conventional cassette loading device. 6 is a side structural view of the cassette loading device of FIG. 5. FIG. FIG. 7 is a cross-sectional structural diagram taken along the cutting line ■-■ in FIG. 5. FIG. 8A is a partially enlarged plan view of the cassette loading device shown in FIG. 5, and FIG. 8B is a side view of FIG. 8A. FIG. 9A, FIG. 9B, and FIG. 9C are operational schematic diagrams for explaining the operation of the cassette loading device. In the figure, 1 is a chassis, 2a and 2b are frames, and 3
a, 3b are guide holes, 4 a s 4 b are guide holes,
6 is a slider, 8a and 8b are holders, and 9a. 9b, 10a, 10b are guide shafts, lla, 11b are presser springs, 12a112b are U-shaped engagement portions, 13 is a drive gear, 26a, 26b are presser lever shafts, 27a
, 27b is a presser lever, 28a, 28b are square holes, 29a
, 29b is a presser lever stopper, and 30 is a cassette. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] A slider that has a mounting surface and that places an inserted cassette on the mounting surface and moves from a cassette insertion position to a predetermined cassette loading position, and a guide that guides the movement of the slider. a spring member that is attached to the slider and presses a cassette inserted into the slider against the placement surface of the slider; The spring member is attached to the cassette so as to allow elastic deformation of the spring member when the spring member is in the insertion position, and to increase the pressing force against the cassette when the slider is in either the moving position or the loading position. A cassette loading device comprising a spring support member that presses and supports the cassette loading device.