JPH09204718A - Cassette loading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components by pressing a cassette holder into contact with a receiving member at the loading position by a single spring. SOLUTION: Slide pins 1a are projectingly provided on the cassette holder 1 arranged between a pair of side plates 2a for holding the cassette and are engaged with guide grooves 3 so as to freely slide, and loading arms 12 connected by a connection member 13 are provided respectively on the side plates 2a, then the slide pin 1a is pressurized by driving one of the loading arms 12, thereby the cassette holder 1 is moved to the loading position. The spring 15 is provided on one of the loading arms 12, and one slide pin 1a is pressurized through this spring 15 and another slide pin is pressurized by another loading arm through the connection member 13, then the cassette holder 1 is energized by elasticity of the spring 15 and twisting force of the connection member 13 so as to be pressed in contact with the receiving member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette loading device in a magnetic recording / reproducing apparatus such as a VTR (including a reproduction-only machine).

[0002]

2. Description of the Related Art A conventional cassette loading device in a VTR of this type will be described with reference to FIGS. 2 to 4 show a general loading device of this type, which will also be used in the description of the embodiments described later. FIG. 5 shows the main part of the conventional one. FIGS. 2 and 5 are perspective views, and FIGS. 3 and 4 are side views for explaining the operation, showing respective members in a see-through state. In these figures, a cassette 10 is held on a cassette holder 1, a slide pin 1a is projected on the cassette holder 1, and a side plate 2a fixed to a chassis 2 has a guide groove through which the slide pin 1a passes. 3 is drilled. A loading arm 4 is rotatably attached to the side plate 2a. The loading arm 4 is composed of left and right loading arms 11 and 12 and a connecting member (shaft) 13 that connects the left and right loading arms 11 and 12, and the left and right loading arms 4 are connected to each other. The arm springs 11 and 12 have torsion springs 14 and 1 respectively.
5 is attached.

These left and right loading arms 11, 1
The above-mentioned cassette holder 1 is provided in the grooves 11a and 12a of 2.
Slide pin 1a is slidably fitted, and a slider 6 which is slid by a drive motor (not shown) is attached to one side plate 2a. The slider 6 is engaged with the boss 4a of the loading arm 12. Cam 6a is formed.

Next, the operation of the above-mentioned loading device will be described with reference to FIGS. When the user inserts the cassette 10 into the cassette insertion opening (not shown), the cassette 10 is introduced into the cassette holder 1. When the cassette holder 1 is moved by a preset amount, a sensor (not shown) reacts, and the drive motor of the loading device starts to rotate according to this information, and the loading operation is started. During the loading operation, the slider 6 slides by receiving a driving force from the drive motor, and the cam 6a of the slider 6 rotates the loading arm 4 at an arbitrary speed. The slide pin 1a of the cassette holder 1 is rotated by the rotation of the loading arm 4.
Is pushed by the grooves 11a and 12a of the loading arm 4, and the cassette holder 1 is moved along the guide groove 3 from the eject position to the loading position.

At this loading position, the cassette holder 1 is received and stopped by a stopper (not shown). The loading arm 4 overruns even after this stop, and the left and right slide pins 1a of the cassette holder 1 are set in the notches 11b and 12b of the grooves 11a and 12a of the loading arm 4 and attached by the left and right torsion springs 14 and 15. Energized. By this urging, the cassette holder 1 is pressed against the stopper and held in a stable state. Therefore, the cassette 10 is maintained in a stable posture, and the recording / reproducing operation of the cassette 10 can be performed. By the above, the loading operation of the cassette 10 is completed.

[0006]

In the above-mentioned conventional cassette loading apparatus, springs for stabilizing the state of the cassette at the time of loading are independently provided on the left and right of the loading arm, which causes a cost increase. Was becoming. It is an object of the present invention to provide a cassette loading device such as a VTR which has a reduced number of parts and is low in cost.

[0007]

In order to solve the above-mentioned problems and achieve the above-mentioned object, a cassette loading apparatus of the present invention has a pair of side plates fixed to a chassis and is arranged between these side plates. Slide pins are projected on both sides of the cassette holder for holding the cassette, and these slide pins are slidably fitted in the guide grooves provided on the side plates, respectively, and fixed to each other by connecting members on the side plates. A loading arm connected to each other is provided, and one of the loading arms is driven and rotated, and the slide pin is pressed by the loading arm to move the cassette holder from the eject position to the loading position. Moved and moved to the loading position by the receiving member of the cassette holder In the cassette loading device, the one loading arm is provided with an elastic member, one of the slide pins is provided with one loading arm via the elastic member, and the other slide pin is provided with the other slide pin. The other loading arm presses the connecting member through the connecting member as described above, and the cassette holder is urged by the elasticity of the elastic member and the twisting force of the connecting member to be pressed against the receiving member. It is characterized by.

Further, the connecting member is made of sheet metal,
One or both of the connecting member and the loading arm may be integrally formed.

[0009]

In the cassette loading apparatus of the present invention constructed as described above, the spring for urging the cassette holder to the regular loading position is only on the drive side. The number of parts is reduced compared to the case where springs are provided on both sides. Also,
By integrally forming the left and right loading arms and the connecting member that connects these loading arms with each other by using a sheet metal, the number of components such as the VTR can be reduced, and as a result, the cost of the entire mechanism such as the VTR can be reduced.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows an essential part of an embodiment of the present invention. Of the loading arms 4, the left loading arm 13d is integrally formed with a connecting member 13 made of sheet metal. The connection member 13 and the loading arm 12 are fixed by being inserted into the right side loading arm 12 formed of separate parts. At the loading position described above, the cam portion 6a of the slider 6 pushes the boss 4a of the right side loading arm 12, and the cassette holder 1 is received at the loading position by a stopper (not shown) and stops, as in the conventional example. Then, the loading arm 4 overruns even after the cassette holder 1 stops as described above, and the right slide pin 1a of the cassette holder 1 fits in the notch 12b of the groove 12a of the loading arm 4 and is attached by the torsion spring 15. Energized.

Groove 13a of the left loading arm 13d
Unlike the conventional example, the left side loading arm 13d overruns because the cassette holder 1 is stopped by the stopper even if the right side loading arm 12 on the drive side overruns without a notch. However, the connecting member 13 is twisted. Regarding the twist of the connecting member 13, when the twist angle per unit length is θ, the coefficient depending on the cross-sectional shape is k, the generated torque is T, and the rigidity is G, the following relationship is established. θ = kT / G

The angle difference between the left and right loading arms 12, 13d occurring at the loading position is φ, and the left and right arms 1
When the distance between 2 and 13d is L, these relationships are as follows. φ = L × θ Therefore, in the left arm 13d, the urging force generated from the relation of the above formula acts, and the slide pin 1a is urged by this. Since the left and right slide pins 1a are pressed by an appropriate force as described above, the cassette holder 1 is stable, the cassette can be kept in a stable posture, and the recording / reproducing operation of the cassette can be performed.

In the above description, the connecting member 13 and the loading arm 13d are separate members, but the connecting member 13, the loading arm 13d and the loading arm 12 may be integrally formed.

[0014]

Since the present invention is constructed as described above, the number of parts is small, and the cost of the mechanism such as the VTR can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of a general cassette loading device.

FIG. 3 is a side view showing an eject position of a general cassette loading device.

FIG. 4 is a side view showing a loading position of a general cassette loading device.

FIG. 5 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Cassette Holder 1a Slide Pin 2 Chassis 2a Side Plate 3 Guide Groove 4 Loading Arm 4a Boss 6 Slider 6a Cam 10 Cassette 11, 12, Loading Arm 11a, 12a Groove 11b, 12b Notch 13 Connecting Member 13a Groove 13d Loading Arm 14, 15 Torsion spring

Claims (2)

[Claims] 1. A pair of side plates are fixed to the chassis, and slide pins are provided on both sides of a cassette holder for holding a cassette, which is arranged between the side plates, and these slide pins are provided on the side plates respectively. Each side plate is provided with a loading arm that is slidably fitted in the guide groove and is connected to each other in a fixed relationship by a connecting member. One of the loading arms is driven to rotate. In the cassette loading device, the slide pin is pressed by the loading arm to move the cassette holder from the eject position to the loading position, and the cassette holder moved to the loading position is received by the receiving member. An elastic member is provided on the loading arm One of the slide pins is pressed by the one loading arm via the elastic member, and the other slide pin is pressed by the other loading arm via the connecting member as described above. A cassette loading device, wherein the cassette loading device is urged by the elasticity of the elastic member and the twisting force of the connecting member to be pressed against the receiving member. 2. The connecting member is made of sheet metal, and one or both of the connecting member and the loading arm are integrally formed.
The cassette loading device described.