JP2710771B2 - Cassette mounting mechanism of magnetic recording / reproducing device - Google Patents

Description

Description: 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. Prior to the description of the present invention, FIGS. 6 and 7 show a conventional cassette mounting mechanism using a VTR as an example.
FIG. 6 is a side view of FIG.
(A)-(c) is a figure which illustrates operation | movement of the lock pin shown by the code | symbol 6 in FIG. 6 in order. In FIG. 6, reference numeral 1 denotes a chassis, and 2 denotes a bracket projecting from the chassis 1. A cassette holder 4 for holding a tape cassette 3 is rotatably mounted on the bracket 2. Is urged upward by a torsion spring (not shown) attached to the torsion spring. When the tape cassette 3 is mounted, the cassette holder 4
The cassette holder 4 includes a leaf spring 5 that presses the cassette 3 downward and a lock pin 6 that engages with a lock mechanism described below to lock the cassette holder 4 at a mounting position (solid line position in FIG. 6). On the top, 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 a 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 configuration, the cassette stage lid 7 at the position shown by the two-dot chain 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 a 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, it enters below the lock arm 8. When the force for pushing down the cassette holder 4 is removed, as shown in FIG. 7C, the lock arm 8 and the lock pin 6 are engaged, and the lock of the cassette holder 4 and the mounting of the tape cassette 3 are performed. Complete. As a prior art relating to a cassette mounting mechanism of a magnetic recording / reproducing apparatus, for example, Japanese Utility Model Application Laid-Open No.
No. 2557 can be mentioned. The configuration and operation of the conventional cassette mounting mechanism shown in FIGS. 6 and 7 are as described above. In this type of structure, the locking operation of the cassette holder 4 is smoothly performed when the cassette is mounted. Fig. 7
The overstroke h shown in (b) is required. FIG. 8 is a right side view of a conventional cassette mounting mechanism different from that of FIG. 6. In the conventional example of FIG. 8, a configuration in which the cassette stage lid 7 and the case 10 are not wrapped at all in the plane direction is shown. By employing this, the overstroke indicated by the symbol h in FIG. 7B is ensured. [0008] SUMMARY OF THE INVENTION It is an object of the present invention, locking of mosquito cell <br/> Tsu preparative overstroke to a holding means for holding the holding member to the lowered position of the lifting direction, i.e. the cassette holding member be present overstroke occupying perform the operation smoothly, the cassette holding member Te lower descending direction smell that can be regulated to a predetermined tape loading position, the improve the reliability of equipment, simplification of structure It is an object of the present invention to provide a cassette mounting mechanism of a magnetic recording / reproducing apparatus which aims at the above. In order to achieve the above object, the present invention has the following configuration. That is, a first chassis member on which a rotating cylinder on which a magnetic tape is attached so that signals can be recorded and reproduced, and a tape cassette containing a magnetic tape wound on a reel are placed. The reel loading member to be loaded is mounted, and the first
A second chassis member slidably held between a first slide position separated from the rotary cylinder and a second slide position close to the rotary cylinder; A cassette holding member that is held up and down with respect to a chassis member to hold the tape cassette and that is attached to and detached from the first chassis member; and a first chassis member and the cassette holding member. Are provided so as to be engageable with each other, and the first
Holding means for holding the cassette holding member at a lowered position in the elevating direction with respect to the chassis member, and an engaging portion and an engaged portion engageable with each other, the cassette holding member being capable of performing the sliding operation. When the front SL is fixed becomes disposed divided into <br/> a second chassis member, said second chassis member slides into the second slide position from the first slide position The cassette holding member, to which the engaging portion is fixed, is lowered with respect to the first chassis member at the lowered position by engaging the engaging portion and the engaged portion in conjunction with the operation. The second chassis member is slid from the second slide position to the first slide position to release the engagement. , Engaging means for raising the cassette holding member with respect to the first chassis member, wherein the holding means is provided on one of left and right side portions of the cassette holding member, and opposite to the one side. The cassette mounting mechanism has the engaging means provided on the other side. According to the above construction, even if there is an overstroke in the holding means for holding the cassette holding member at the lowered position in the elevating direction with respect to the first chassis member, the engaging means allows the second holding member to be moved. Tepuro in conjunction with the sliding movement of the chassis member of Jo Tokoro with respect to the first chassis member at its lower descending direction the cassette holding member
The holding position can be restricted to the loading position, the reliability of the device can be improved, and the holding means and the engaging means can be provided together with a simple configuration. DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 a cassette mounting mechanism according to the present invention when a cassette is mounted.
FIG. 5 is a schematic plan view showing a state after the tape loading of the mechanism of the present invention is completed. In FIG. 3 showing a state in which the cassette is mounted, the supply reel 11 and the take-up reel 12 of the tape cassette 3 inserted into 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 in the direction of the rotary cylinder 18. In the above configuration, when the cassette holder in which the tape cassette 3 is inserted is mounted on the sub-chassis 13 and the tape loading operation is performed, the magnetic tape 19 is formed by the pair of tape drawers 16 and 17.
When the sub-chassis 13 on which the tape cassette 3 is mounted is pulled out to a predetermined position shown in FIG.
(In the direction of the arrow in FIG. 5) and stops at a predetermined position shown in FIG. FIG. 1 is a perspective view showing the overall structure of a cassette mounting mechanism according to the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1 when the cassette is mounted, and FIG. 4 is a view showing a state after tape loading is completed. FIG. 1 and 2, a cassette holder 4 into which a tape cassette 3 is inserted is rotatably mounted on brackets 2 and 20 projecting from a main chassis 1, and is mounted on the bracket 2. It is urged upward by a torsion spring 21. Further, the upward rotation of the cassette holder 4 is regulated 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 mounted on the upper surface of the cassette holder 4. Reference numerals 22 and 23 denote slide stopper members for regulating the rearward position of the tape cassette 3 when the tape cassette 3 is inserted into the cassette holder 4.
3 is a side rising portion 13a of the sub-chassis 13 and 1
3b so as to be rotatable, and slidably mounted in the grooves 24 and 25 of the cassette holder 4, respectively.
Rotates integrally with the cassette holder 4, and during tape loading, the tape cassette 3 is
Move with. The lock mechanism of the cassette holder 4
The lock arm 8 includes a lock arm 8 rotatably provided on a side surface of the main chassis 1 and a spring 9 for urging the lock arm 8 in a fixed direction. It is regulated by the contact between the notch-shaped end face 1 a of the main chassis 1 and the outer end face 8 a of the lock arm 8. On the other hand, when the tape cassette 3 is mounted, the lock arm 8
Lock pin 6 that locks cassette holder 4 by engaging with
Are projected from a thin lock plate 26 provided on the side surface of the cassette holder 4. Reference numerals 27 and 28 denote hold pins protruding from both sides of the cassette holder 4, and reference numerals 13c and 13d denote hook portions provided on both sides of the sub-chassis 13 corresponding to the hold pins 27 and 28, respectively. Part 13
c and 13d are tapered portions 13c 'and 13d' formed on the rotary cylinder 18 side, respectively, and are connected to the tapered portions 13c 'and 13d'.
It has straight portions 13c "and 13d" formed on the sides 4 and 15. Next, an overall operation system of the cassette mounting mechanism shown in the illustrated embodiment will be described with reference to FIGS. FIG. 2 shows a case where the tape cassette 3 is in a standby state by the engagement between the lock arm 8 and the lock pin 6. At this time, the tape cassette 3 is moved by the cassette holder 4 so that the tape travels. Is held slightly above the regular mounting position. In this state, tape loading is performed, and when the sub-chassis 13 moves in the direction of the arrow in FIG. 2, the tape-shaped portion 13c 'of the hook portion 13c formed on the side surface of the sub-chassis 13
The hold pin 27 protruding from the side surface of the cassette holder 4 is guided, and when the tape loading is completed, as shown in FIG.
As a result, the cassette holder 4 is moved downward by H at the position of the lock pin 6 together with the tape loading, and the tape cassette 3 is moved.
Is kept in the proper position. At this time, the tapered portion 13d 'of the hook portion 13d (see FIG. 1) formed on the side surface of the sub-chassis 13 also protrudes from the side surface of the cassette holder 4 on the left side of the cassette mounting mechanism. When the tape loading is completed, the hold pin 28 is guided to the straight portion 13d "of the hook portion 13d. In the illustrated embodiment, the cassette feed direction is used as a reference. A pair of engaging members on both left and right sides thereof, that is, hold pins 2 protruding from both sides of the cassette holder 4.
7 and 28, and the case where hook portions 13c and 13d provided continuously on both sides of the sub-chassis 13 have been described.
The hold pin 27 protruding from one side and the hook portion 13c of the sub-chassis 13 corresponding to the hold pin 27 may be omitted. According to this configuration, the cassette mounting mechanism is further improved as compared with the illustrated embodiment. Can be simplified. As described above, according to the present invention, the magnetic tape is wound around the first chassis member on which the rotating cylinder to which the magnetic tape is attached so as to record and reproduce the signal is mounted on the reel. A tape cassette containing a magnetic tape is placed, and a reel loading member on which the reel is loaded is mounted.
A second chassis member slidably held between a first slide position separated from the rotary cylinder and a second slide position close to the rotary cylinder; A cassette holding member that is held up and down with respect to a chassis member to hold the tape cassette and that is attached to and detached from the first chassis member; and a first chassis member and the cassette holding member. Are provided so as to be engageable with each other, and the first
Holding means for holding the cassette holding member at a lowered position in the elevating direction with respect to the chassis member, and an engaging portion and an engaged portion engageable with each other, the cassette holding member being capable of performing the sliding operation. When the front SL is fixed becomes disposed divided into <br/> a second chassis member, said second chassis member slides into the second slide position from the first slide position The cassette holding member, to which the engaging portion is fixed, is lowered with respect to the first chassis member at the lowered position by engaging the engaging portion and the engaged portion in conjunction with the operation. The second chassis member is slid from the second slide position to the first slide position to release the engagement. , Engaging means for raising the cassette holding member with respect to the first chassis member, the holding means being provided on one of left and right side portions of the cassette holding member, and an opposite of the one side; In the cassette mounting mechanism of the magnetic recording / reproducing apparatus, the engaging means is provided on the other side. According to this configuration, the following advantages can be expected. Even if there is an overstroke in the holding means for holding the cassette holding member at the lowered position in the elevating direction with respect to the first chassis member, that is, an overstroke for smoothly performing the locking operation of the cassette holding member, The second chassis by the engagement means;
In conjunction with the sliding operation of the member can be restricted to a tape loading position of <br/> plant constant with respect to the first chassis member said cassette holding member in the downward direction below it
The reliability of the device can be improved, and the holding means and the engaging means can be provided together with a simple configuration.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an overall configuration showing an embodiment of a cassette mounting mechanism according to the present invention. FIG. 2 is a view on arrow A of FIG. 1 when a cassette is mounted. FIG. 3 is a schematic plan view of FIG. FIG. 4 is a view on arrow A in FIG. 1 showing a state after completion of tape loading. FIG. 5 is a schematic plan view of FIG. FIG. 6 is a right side view (a view corresponding to the arrow A in FIG. 1) showing a specific example of the conventional cassette mounting mechanism. FIGS. 7A to 7C are diagrams for sequentially explaining the operation of a lock pin 6 when a cassette is mounted. FIG. 8 is a right side view of a conventional cassette mounting mechanism different from FIG. [Description of Signs] 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 ... take-up side Reel, 13 ... Subchassis, 1
3c and 13d: hook portions, 13c 'and 13d'
... tapered portions, 13c "and 13d" ... straight portions, 18 ... rotating cylinders, 27 and 28 ... hold pins.

Claims (1)

(57) [Claims] A first chassis member on which a rotating cylinder on which a magnetic tape is attached so that signals can be recorded and reproduced, and a tape cassette containing a magnetic tape wound on a reel are mounted, and the reel is loaded. The first chassis member is slidably held by the first chassis member between a first slide position separated from the rotary cylinder and a second slide position close to the rotary cylinder. A second chassis member, held up and down with respect to the first chassis member,
A cassette holding member that holds the tape cassette and that is attached to and detached from the first chassis member; and a first chassis member and the cassette holding member that are provided so as to be engageable with each other. holding means for holding said cassette holding member in the lowered position of the lifting direction with respect to the first chassis member, engageable engaging portion and the engaged portion with each other, with respect to the sliding operation, the cassette holding is fixed becomes provided divided into a front SL and the second chassis member member, interlocked with the operation of the second chassis member slides into the second slide position from the first slide position The cassette holding member, to which the engaging portion is fixed, is lowered with respect to the first chassis member at the lowered position by the engaging portion being engaged with the engaged portion. The second chassis member is slid from the second slide position to the first slide position to release the engagement. And an engaging means for raising the cassette holding member with respect to the first chassis member. The holding means is provided on one of left and right side portions of the cassette holding member, and is opposite to the one side. A cassette mounting mechanism for a magnetic recording / reproducing apparatus, wherein the engaging means is provided on the other side of the cassette.