JPH08315470A - Cassette loading mechanism for magnetic recording / playback device - Google Patents

Abstract

(57) Abstract: In a cassette mounting mechanism of a magnetic recording / reproducing apparatus, a holding means for holding a cassette holding member at a lowered position in the ascending / descending direction of a chassis member has an overstroke, that is, a lock of the cassette holding member. There is an overstroke that allows smooth movement. SOLUTION: Even if there is an overstroke in the holding means, the cassette holding member can be restricted to a desired position with respect to the chassis member in the ascending / descending direction, and the reliability of the device can be improved. Providing a cassette mounting mechanism with a simplified structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette mounting mechanism of a magnetic recording / reproducing apparatus using a cassette tape such as a VTR.

[0002]

Prior to the description of the present invention, a conventional cassette mounting mechanism will be described with reference to FIG. 6 and FIG.
6 is a side view thereof, and FIG.
(A)-(c) is a figure explaining the operation | movement of the lock pin shown by the code | symbol 6 in FIG. 6 in order.

In FIG. 6, 1 is a chassis, 2 is a bracket projecting from the chassis 1, a cassette holder 4 for holding a tape cassette 3 is rotatably attached to the bracket 2, and the bracket 2 It is biased upward by a torsion spring (not shown) attached to the. When the tape cassette 3 is mounted, the cassette holder 4
The cassette 3 has a leaf spring 5 that presses the cassette 3 downward, and a lock pin 6 that locks the cassette holder 4 at a mounting position (solid line position in FIG. 6) by engaging with a lock mechanism described later. On the upper surface, the cassette stage lid 7
Is attached. As a lock mechanism of the cassette holder 4 described above, a lock arm 8 that engages with the lock pin 6 is rotatably attached to a side surface (not shown) of the chassis. Is urged in the direction of the arrow.

In the above structure, the cassette stage lid 7 at the position indicated by the chain double-dashed line in FIG. 6 (the position where the tape cassette 3 is inserted into the cassette holder 4) is pressed,
When the cassette holder 4 is pushed down slightly below the mounting position (shown by the solid line), the lock pin 6 pushes the lock arm 8 against the urging force of the spring 9 as shown in FIG. As shown in FIG. 7B, the lock arm 8 is inserted below. Then, when the force of pushing down the cassette holder 4 is removed, as shown in FIG. 7C, the lock arm 8 and the lock pin 6 engage with each other to lock the cassette holder 4 and mount the tape cassette 3. Complete.

Incidentally, as a prior art relating to a cassette mounting mechanism of a magnetic recording / reproducing apparatus, for example, Japanese Utility Model Laid-Open No. 59-4
No. 2557 can be mentioned.

The structure and operation of the conventional cassette mounting mechanism shown in FIGS. 6 and 7 are as described above. In this type of structure, the cassette holder 4 can be smoothly locked when the cassette is mounted. Figure 7
The overstroke h shown in (b) is required.

FIG. 8 shows a right side view of a conventional cassette mounting mechanism different from that of FIG. 6. In the conventional example of FIG. 8, the cassette stage lid 7 and the case 10 are not overlapped in the plane direction. By adopting this, the overstroke indicated by the symbol h in FIG. 7B is ensured.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to smoothly carry out an overstroke, that is, a locking operation of a cassette holding member, on a holding means for holding a cassette holding member at a lowered position in its ascending / descending direction with respect to a chassis member. Even if there is an overstroke to close, the cassette holding member can be restricted to a desired position with respect to the chassis member in the ascending / descending direction, which improves the reliability of the device and simplifies the structure. It is intended to provide a cassette mounting mechanism for a magnetic recording / reproducing apparatus.

[0009]

In order to achieve the above object, the present invention has the following constitution. That is, a chassis member, a cassette holding member that is held by the chassis member so as to be able to move up and down, and that holds a tape cassette that stores a magnetic tape wound around a reel and that is attached to and detached from the chassis member, and the chassis member. And a cassette holding member that is provided so as to be engageable with each other and that holds the cassette holding member at a lowered position in the vertical direction with respect to the chassis member. The chassis member is a reel on which a first chassis having a rotating cylinder on which the magnetic tape is attached so that signals can be recorded and reproduced is mounted, and the mounted tape cassette is mounted and the reel is loaded. A first slide position on which a loading member is mounted, the first chassis being spaced apart from the rotary cylinder, and the rotary cylinder. A second chassis slidably held between a second sliding position in contact with the second chassis, and an engaging portion and an engaged portion capable of engaging with each other, the cassette holding member and the chassis member. And the engaging portion and the engaged portion are engaged in conjunction with the operation of the second chassis sliding from the first slide position to the second slide position. By being combined, the cassette holding member is restricted to a predetermined position in the elevating direction with respect to the chassis member in the lowered position, and the second chassis is moved from the second slide position to the first position. The cassette holding member is provided with an engaging means that enables the cassette holding member to be raised with respect to the chassis member by releasing the engagement in association with the operation of sliding to the slide position. Together with one the the side holding means of the left and right side portions are provided, the configuration of the one side the engaging means provided to become cassette loading mechanism on the other side of the opposite.

According to the above construction, even if the holding means for holding the cassette holding member at the lowered position in the ascending / descending direction with respect to the chassis member has an overstroke, the engaging means causes the second chassis to move. The cassette holding member can be regulated to a desired position with respect to the chassis member in the ascending / descending direction in conjunction with the sliding operation, aiming to improve the reliability of the device, and at the same time, to hold the holding means and the engaging means. It can be installed side by side with a simple configuration.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to one embodiment of FIGS. 1 to 5. FIG. 3 is a schematic plan view of the cassette mounting mechanism according to the present invention when a cassette is mounted,
FIG. 5 is a schematic plan view showing the state of the mechanism of the present invention after completion of tape loading.

In FIG. 3 showing the state when the cassette is mounted, the reel 11 on the supply side and the reel 12 on the take-up side of the tape cassette 3 inserted in the cassette holder are a pair of reel disks (see FIG. 1
14 and 15). At this time, the pair of tape drawers 16 and 17 are relatively fitted into predetermined positions in the tape cassette 3. The sub chassis 13 is located on the main chassis 1 and moves toward the rotary cylinder 18.

In the above structure, when the cassette holder into which the tape cassette 3 is inserted is mounted on the subchassis 13 and the tape loading operation is performed, the magnetic tape 19 is moved by the pair of tape drawers 16 and 17.
The sub-chassis 13 which is pulled out to a predetermined position shown in FIG. 5 and on which the tape cassette 3 is placed is oriented in the direction of the rotary cylinder 18 which is placed on the main chassis 1 (see FIG.
(Arrow direction of arrow) and stop at a predetermined position shown in FIG.

FIG. 1 is a perspective view showing the entire structure of a cassette loading mechanism according to the present invention, FIG. 2 is a view taken along the arrow A in FIG. 1 when a cassette is loaded, and FIG. 4 is a view showing a state after completion of tape loading. FIG.

1 and 2, the cassette holder 4 into which the tape cassette 3 is inserted is rotatably attached to brackets 2 and 20 projecting from the main chassis 1 and attached to the bracket 2. It is biased upward by the torsion spring 21. Further, the upward rotation of the cassette holder 4 is restricted by the contact between the cut and bent portion 2a of the bracket 2 and the stopper portion 4a of the cassette holder 4. The cassette holder 4 is provided with a leaf spring 5 for pressing the cassette 3 downward when the tape cassette 3 is mounted, and a cassette stage lid 7 is attached to the upper surface of the cassette holder 4. Reference numerals 22 and 23 denote slide stopper members that regulate the position of the tape cassette 3 rearward when the tape cassette 3 is inserted into the cassette holder 4.
3 is a side surface rising portion 13 a and 1 of the sub chassis 13.
3b are rotatably mounted on the tape holder 3 and slidably mounted on the grooves 24 and 25 of the cassette holder 4, respectively.
Rotates together with the cassette holder 4, and when the tape is loaded, the tape cassette 3 moves to the sub chassis 13
Move with. The lock mechanism of the cassette holder 4 is
It is composed of a lock arm 8 rotatably provided on the side surface of the main chassis 1 and a spring 9 for urging the lock arm 8 in a certain direction. The rotation of the lock arm 8 in the urging direction is It is regulated by contact between the notched end surface 1a of the main chassis 1 and the outer shape end surface 8a of the lock arm 8. On the other hand, when the tape cassette 3 is mounted, the lock arm 8
Lock pin 6 that engages with and locks the cassette holder 4
Are protrudingly provided on a thin plate-like lock plate 26 provided on the side surface of the cassette holder 4.

Reference numerals 27 and 28 denote hold pins projectingly provided on both sides of the cassette holder 4, and 13c and 13d denote hook portions continuously provided on both sides of the sub chassis 13, corresponding to the hold pins 27 and 28, respectively. Part 13
c and 13d are taper-shaped parts 13c 'and 13d' formed on the rotary cylinder 18 side, respectively, and the reel disk 1 is continuous with the taper-shaped parts 13c 'and 13d'.
It has straight shaped portions 13c ″ and 13d ″ formed on the sides 4 and 15.

Next, the overall operation system of the cassette mounting mechanism shown in the illustrated embodiment will be described with reference to FIGS. 2 and 4.

FIG. 2 shows the case where the tape cassette 3 is in the standby state due to the engagement of the lock arm 8 and the lock pin 6, but at this time, the tape cassette 3 is moved by the cassette holder 4 when the tape runs. It is held slightly above the regular mounting position for. When tape loading is performed in this state and the sub-chassis 13 moves in the direction of the arrow in FIG. 2, the taper-shaped portion 13c ′ of the hook portion 13c formed on the side surface of the sub-chassis 13 is
The hold pin 27 protruding from the side surface of the cassette holder 4 is guided, and when the tape loading is completed, the hold pin 27 is moved to the hook portion 13c as shown in FIG.
As a result, the cassette holder 4 moves downward by H at the position of the lock pin 6 along with the tape loading, and the tape cassette 3
Are held in their regular positions. At this time, also on the left side of the cassette mounting mechanism, similarly, the taper-shaped portion 13d 'of the hook portion 13d (see FIG. 1) formed on the side surface of the sub-chassis 13 is projected on the side surface of the cassette holder 4. The hold pin 28 provided is guided, and when the tape loading is completed, the hold pin 28 is guided to the straight shape portion 13d ″ of the hook portion 13d.

In the illustrated embodiment, a pair of engaging members on both left and right sides of the cassette feed direction, that is, a hold pin 2 projecting from both sides of the cassette holder 4 is used.
7 and 28, and further, the case where the hook portions 13c and 13d continuously provided on both sides of the sub-chassis 13 are provided has been described, among the above-mentioned members, the cassette holder 4
The hold pin 27 protruding on one side and the hook portion 13c of the sub chassis 13 corresponding thereto, or the hold pin 28 protruding on the other side of the cassette holder 4 and the hook portion 13d of the sub chassis 13 corresponding thereto. May be omitted, and with this configuration, the structure of the cassette mounting mechanism can be further simplified as compared with the illustrated embodiment.

[0020]

As described above, according to the present invention, the chassis member and the tape cassette that is held by the chassis member so as to be able to move up and down and that stores the magnetic tape wound around the reel are held together with the chassis member. A cassette holding member that is attached to and detached from the chassis holding member, and the chassis member and the cassette holding member are provided so as to be engageable with each other, and the cassette holding member is held at the lowered position in the vertical direction with respect to the chassis member. In the magnetic recording / reproducing apparatus, the chassis member includes a first chassis having a rotating cylinder on which the magnetic tape is attached so as to record and reproduce signals, and the mounted tape. A cassette is placed, a reel loading member for loading the reel is loaded, and the first chassis is separated from the rotary cylinder. A second chassis slidably held between a ride position and a second slide position adjacent to the rotary cylinder; and an engaging portion and an engaged portion which are engageable with each other. The engaging portion is provided separately from the cassette holding member and the chassis member, and is interlocked with the operation of sliding the second chassis from the first slide position to the second slide position. And the engaged portion engage with each other to restrict the cassette holding member to a predetermined position in the ascending / descending direction with respect to the chassis member at the lowered position, and the second chassis allows the second chassis to move to the second position. Engagement that enables the cassette holding member to rise with respect to the chassis member by releasing the engagement in association with the operation of sliding from the sliding position to the first sliding position. A magnetic recording / reproducing device including a step, wherein the holding means is provided on one side of both left and right sides of the cassette holding member, and the engaging means is provided on the other side opposite to the one side. It is in the cassette mounting mechanism of the device.

According to this structure, the following advantages can be expected.

Even if the holding means for holding the cassette holding member in the lowered position in the ascending / descending direction with respect to the chassis member has an overstroke, that is, an overstroke for smoothly performing the locking operation of the cassette holding member, the engagement is performed. By means of the means, the cassette holding member can be regulated to a desired position with respect to the chassis member in the ascending / descending direction in association with the sliding operation of the second chassis, thereby improving the reliability of the device and The holding means and the engaging means can be installed together with a simple structure.

[Brief description of drawings]

FIG. 1 is a perspective view of the overall configuration showing an embodiment of a cassette mounting mechanism according to the present invention.

FIG. 2 is a view as seen from an arrow A in FIG. 1 when a cassette is attached.

FIG. 3 is a schematic plan view of the drawing.

FIG. 4 is a view on arrow A in FIG. 1 showing a state after completion of tape loading.

5 is a schematic plan view of FIG.

FIG. 6 is a right side view (corresponding to arrow A in FIG. 1) showing a specific example of a conventional cassette mounting mechanism.

7A to 7C are diagrams for sequentially explaining the operation of the lock pin 6 when the cassette is mounted.

FIG. 8 is a right side view of a conventional cassette mounting mechanism different from FIG.

[Explanation of symbols]

1 ... Chassis (main chassis), 3 ... Tape cassette, 4 ... Cassette holder, 6 ... Lock pin, 7 ... Cassette stage lid, 8 ... Lock arm, 11 ... Supply side reel, 12 ... Winding side reel, 13 ... Sub Chassis, 1
3c and 13d ... Hook portion, 13c 'and 13d'
... taper shape parts, 13c "and 13d" ... straight shape parts, 18 ... rotating cylinders, 27 and 28 ... hold pins.

Claims (1)

[Claims] 1. A chassis member, and a cassette holding member which is held by the chassis member so as to be lifted and lowered, holds a tape cassette in which a magnetic tape wound around a reel is stored, and which is attached to and detached from the chassis member. Magnetic recording comprising: a chassis member and a cassette holding member, which are provided so as to be engageable with each other, and which holds the cassette holding member at a lowered position in the up-and-down direction with respect to the chassis member. In the reproducing device, the chassis member includes a first chassis having a rotating cylinder on which the magnetic tape is attached so that signals can be recorded and reproduced, the mounted tape cassette, and the reel loaded. A reel loading member mounted on the first chassis, and a first slide position spaced from the rotary cylinder on the first chassis and the rotary cylinder. A second chassis slidably held between the housing and a second slide position adjacent thereto, and an engaging portion and an engaged portion which are engageable with each other and the cassette holding member. The engaging portion and the engaged portion are provided separately from the chassis member and interlocked with the operation of sliding the second chassis from the first slide position to the second slide position. Are engaged with each other to restrict the cassette holding member to a predetermined position in the elevating direction with respect to the chassis member in the lowered position, and the second chassis from the second slide position to the second sliding position. The cassette holding member is provided with an engagement means that can be lifted with respect to the chassis member by releasing the engagement in association with the operation of sliding to the first slide position. Together with the holding means on one side of the right and left side portions of the member are provided, the one cassette loading mechanism of a magnetic recording and reproducing apparatus characterized by comprising said engagement means is provided on the other side of the opposite side.