JPH043358A - Cassette stage lock mechanism - Google Patents

Abstract

PURPOSE:To avoid deformation of a lock member or a kick member by moving the lock member to guide a guide part even at the time when the kick member constituting a lock mechanism is operated and a cassette stage performs the cassette loading operation in this state. CONSTITUTION:A slide chassis 8 is attached to a chassis 1 so that the chassis 8 can be moved in the direction of an arrow A, and a cassette stage 7 can be turned with a turning fulcrum 7a as the center. An engaging pin 2 is provided, and a cassette holder 7b to hold a cassette 6 is attached to the stage 7, and the stage 7 is engaged with the pin 2 of the chassis 1 against the force of a stage energizing spring omitted in the figure and is locked, and this lock member 3 can be turned with a fulcrum 3a as the center. The member 3 is energized by an energizing spring 4 to perform the lock operation, and a turnable kick member 5 is attached to the chassis 1. Thus, the lock member 3 is turned against the spring 4 to guide the member 5 to a guide part 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a locking mechanism for a cassette stage of a thin magnetic recording/reproducing device.

[Conventional technology]

In the conventional mechanism, a locking member is rotatably provided on the cassette stage, and the locking member is biased by a biasing spring.
When mounting a cassette, the cassette stage is operated, and a locking member provided on the main body chassis engages and locks the locking member, thereby mounting the cassette at a predetermined location. Also, E
At the time of JECT, the lock member is pushed by the pusher member to release the lock, and the stage moves to a predetermined cassette ejection position. As a device of this kind, Japanese Patent Application Laid-Open No. 63-2
There is a publication No. 49959.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, when the locking member is pushed by the locking member to release the lock at the time of EJECT, the cassette stage that has been erroneously unlocked is reset to the cassette stage again with the locking member still operating in the unlocked state. When the mounting operation is performed, the locking member and the locking member come into contact with each other at a portion other than the normal operating part, so there is a possibility that an accident may occur in which the locking member is deformed or the locking member is deformed. In particular, if the user accidentally
There are cases where an ECT operation is performed and the user immediately tries to insert the cassette again due to an incorrect operation.
Since there is a time lag in the EJECT operation when the Ketobashi member is electrically operated by the operation of the motor, there is a problem that this operation is very likely to cause the device to break. In particular, E-type
For thinner products, the rigidity of the parts was low, and there was a high risk that the device would break due to the above operations.

An object of the present invention is to eliminate the drawbacks of the prior art and to realize a locking mechanism for a cassette stage that is small and thin, safe, and inexpensive in cost.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a mechanism for moving a locking member when a cassette stage is operated to mount a cassette while the locking member is operated to an unlocked state. If you come,
A guide portion is provided which contacts the lock member and rotates and guides the lock member against the biasing spring force of the lock member.

Further, the guide part was formed by bending the ketobashi member as a metal member of the press, and the parts other than the guide part were made to operate with a thin press plate.

Further, the guide portion is formed by bending, and the bent end portion is configured to abut against the plane portion of the lock member when deforming force is applied when the lock member abuts the guide portion.

[Effect]

The guide part provided on the Ketobashi member is such that even if the cassette stage is operated to attach a cassette while the Ketobashi member is operated, the locking member moves and comes into contact with the guide part and is guided.
Even in the unlikely event of an operation that is not normally performed as described above, it is possible to prevent defects that lead to deformation of the locking member or deformation of the locking member.

Furthermore, by forming the ketobashi member from a thin press plate, less space is required, and the device can be made smaller and thinner.

In addition, the bent end part is securely attached to the guide part when it comes into contact with the locking member.
Even if a strong force is applied, the shape of the bent part will not be deformed because it is in contact with the flat part of the Ketobashi member.
Guidance operation becomes possible reliably.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

FIG. 1 is a side view of a cassette stage 7 in an UP state in which a cassette 6 can be inserted or removed. A slide chassis 8 is attached to the chassis 1 so as to be movable in the direction of the arrow. Rotation fulcrum 7a
It is mounted so that it can rotate around the center. Also, engaging pin 2
is installed. A cassette holder 7b for holding the cassette 6 is attached to the cassette stage 7,
A locking member 3 for engaging and locking the cassette stage 7 with the engagement pin 2 of the chassis 1 against a cassette stage biasing spring force (not shown) and holding the cassette stage 7 rotates around a pivot point 3a. It is movably mounted. The locking member 3 receives a biasing force from a biasing spring 4, and performs a locking operation by this biasing force. A ketobashi member 5 is rotatably mounted on the chassis 1.

A cassette hole detection SW8 is attached to the slide chassis 8.

FIG. 2 is a side view of the cassette stage 7 in the DOWN state and engaged and locked with the chassis 1. The engagement pin 2 and the locking member 3 are engaged and locked to hold the cassette stage 7 in the DOWN state. do.

FIG. 3 is a plan view of the chassis 1, in which the cage member 5 is rotatably mounted around a pivot point 1b and has a guide portion 5a. Further, when the operating end 11a of the operating member 11 having the semicircular portion 5a and engaging with the cam groove 10a of the cam gear 10 moves into contact with the semicircular portion 5a,
The locking member 5 rotates and presses the pressing portion 3b to perform a lock release operation. The operating member 11 is mounted on the chassis 1 so as to be rotatable about a rotation fulcrum 1c, and a cam pin llb provided on the operating member 11 engages with a cam groove 10a, and is rotated by rotation of the cam gear 10. movement is performed. The cam gear 10 is driven by a loading motor (not shown), and gears are transmitted through a reduction gear train. A stage lock detection switch 12 is installed on the chassis 1,
When the cassette stage 7 is in the DOWN state and the locking member 3 is engaged and locked by the engagement pin 2, the pushing part 3b of the locking member 3 abuts against and presses the Ketobashi member 5 and rotates. is operated to perform lock detection.

FIG. 4 is a side view of the main parts around the locking member 3 during the cassette loading operation of a normal cassette stage. The lock member 3 and the engagement pin 2 eventually engage and are held locked. At this time, since the ketobashi member 5 is in the non-ketobashi operating position,
It does not interfere with the locking operation, and the guide portion 5a also
It does not come into contact with the pressing part of the locking member 3.

FIG. 5 is a side view of the main parts around the locking member 3 when the cassette stage is loaded with a cassette in a state where the locking member 5 is rotated to the locking position. The guide portion 5a of the locking member 3 or the pushing portion 3b contacts each other with a sliding angle of θ. Deformation of the member 5 can be prevented and damage will not occur.

The sliding angle θ is approximately 55″ or less, and when a large force is applied to the guide portion 5a when the pressing portion 3b comes into contact with the guide portion 5a, the bent end portion of the guide portion 5a and the bent end portion of the guide portion 5a are separated by a gap δ. Since the structure is designed to contact and receive when it flexes, the gap δ is
Guiding operations can be performed reliably without deforming only the following.

FIG. 6 is a side view of the main parts around the locking member 3 when the cassette stage is loaded with a cassette in a state where the locking member 5 is in the locking position in the conventional device. It is guided in contact with the dowel pin 2 and rotated against the biasing force of the biasing spring 4, but the pressing part 3b comes into contact with the main body of the Ketobashi member 5 and the sliding angle is almost 90', so it does not escape. Since the contact force is directly applied to the ketobashi member 5 and the pressing part 3b without being
The Ketobashi member 5 or the pressing portion 3b will be deformed, resulting in malfunction.

FIG. 7 is a sectional view of the essential parts around the ketobashi member 5 of this embodiment, and when the slide chassis 8 performs a loading operation, the cassette hole detection SW 9 installed on the slide chassis 8 is connected to the Ketobashi member 5 in a plane. Move to the position where the target is wrapped. At this time, a clearance Q must be provided between the ketobashi member 5 and the cassette hole detection SW9.

In this embodiment, since a press plate is used, after securing Q, the TOTA between chassis 1 and slide chassis 8 is
It has become possible to reduce the L spacing and downsize the device. Further, since the guide portion 5a is formed by bending so that it is not easily deformed even if a force is applied to the guide portion, a thin press member can be used.

〔Effect of the invention〕

According to the present invention, by integrally providing the guide portion in the ketobashi member, the pivoting operation state is achieved in which the ketobashi member presses the locking member provided on the cassette stage and releases the engagement between the engagement pin of the chassis and the locking member. Even if the locking member is operated under unusual conditions such as trying to operate the SEKAT stage with the cassette attached, the locking member will come into contact with the guide part of the Ketobashi member and be guided, thereby preventing damage such as deformation. This has the great effect of making it possible.

Furthermore, by forming the ketobashi arm as a press plate and the guide part by bending, the main body part can be made thinner and the occupied volume can be reduced, which has a great effect on making the device smaller and thinner. In terms of cost, since the guide part is not a separate member, it can be manufactured at low cost.

In addition, the shape of the guide part is approximately triangular and the bent end is configured to come into contact with and receive the locking member, so even if the guide part is subjected to a large force due to contact with the lock member, the guide part will not deform. Since the lock arm is received in contact with the main body of the lock arm, the lock arm can be reliably guided without being deformed by the push rod member made of a thin press plate.

[Brief explanation of the drawing]

FIG. 1 is a side view of the cassette stage in the UP state where the cassette can be inserted or removed, FIG. 2 is a side view of the cassette stage in the DOWN state where the cassette stage is engaged and locked with the chassis, and FIG. 3 is a plan view of the main parts of the chassis. Figure 4 is a side view of the main parts around the lock member during normal cassette loading operation, and Figure 5 shows the lock when the cassette stage is loaded with a cassette with the locking member rotated to the locking position. FIG. 6 is a side view of the main parts around the lock member in the conventional device, and FIG. 7 is a sectional view of the main parts around the locking member in this embodiment. 1... Chassis, 5a... Guide section. 2... Engagement pin, 7... Cassette stage. 3...Lock member, 8...Slide chassis. 3a...pressing part. 9...Cassette hole detection SW. 5...Ketobashi member. 1st mouth n 2nd mouth

Claims (1)

[Claims] 1. A cassette stage for attaching or detaching a cassette to a magnetic recording/reproducing device, a lock member rotatably held on the cassette stage, a lock spring that biases the lock member, and a magnetic recording device. It consists of a locking engagement member provided on the main body chassis of the playback device and a swinging member rotatably provided on the main body chassis, and when the cassette is ejected, the locking member is pushed by the rotational action of the swinging member and locked into engagement. When the cassette stage is attempted to be moved to the cassette mounted state with the ejector member disengaged from the ejector member and the ejector member is in a rotating state, the guide portion and lock member integrally provided on the ejector member may come into contact with each other. A locking mechanism for a cassette stage, characterized in that the locking arm is configured to rotate against the biasing force of a lock spring and escape along a guide. 2. A locking mechanism for a cassette stage according to claim 1, wherein the push-up member is made of a pressed metal material, and the guide portion is formed by bending. 3. In claim 2, the shape of the guide part is approximately triangular, and when the bending guide part is subjected to force due to contact with the locking member, even if the bending guide part tries to deform, the bending guide part A locking mechanism for a cassette stage, characterized in that the bent end portion is configured to abut and receive the tipping member.