JPS5868265A - Cassette loading device - Google Patents

Abstract

PURPOSE:To reduce the number of parts and to improve the reliability of operation by providing a means of regulating the moving route and attitude of a frame body for holding a cassette on both sides of the frame body, and putting them in synchronous operation. CONSTITUTION:A tape cassette is inserted into the stage frame body 23 of a base plate 1 and then positioned by stoppers 24a and 24b. A motor 47 is started to transmit the rotation of a shaft 50 to a worm gear 45 through a pulley 51 and 53. Synchronizing gears 44a and 44b, and sector gears 41a and 41b are rotated through a synchronizing shaft 43. Then, rotary links 38a and 38b operate and then pin members 37a and 37b of the frame body 23 move along guide holes, advance to the inner part horizontally, and move down to fit reels in the cassette in reel turntables 22a and 22b, thereby stopping the motor 47. The attitude of the frame body 23 is held by link bars 27a and 27b, and 29a and 29b, and pin members of respective end parts. Consequently, the number of parts is decreased, and loading and unloading are secured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette loading device for a magnetic recording and reproducing device, and more particularly to a cassette loading device that inserts a cassette from the front of the magnetic recording and reproducing device and automatically loads it into the device.

In a cassette loading mechanism in which the cassette is inserted and loaded from the front of the magnetic recording/reproducing device, the cassette first enters the magnetic recording/reproducing device parallel to the board to a predetermined position, then descends onto the board and is loaded. Complete. In the conventional cassette loading mechanism, the cassette advancing operation and lowering operation described above,
Problems such as the separation of the cassette attitude regulating means from the 691 mechanism, which made the mechanism complex, and the unsmooth movement between approach and descent, contributed to the decrease in the reliability of the 691 mechanism. Furthermore, the driving means used was mainly one using a chain, or one using a rack and a binion, and the mechanism lacked simplicity.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional apparatus, it is an object of the present invention to provide a cassette loading apparatus that is simple and has a small number of parts and has high operational reliability.

A feature of the present invention is that the cassette attitude regulating means during the cassette loading operation and the guiding means for regulating the cassette movement path are completely separated, and each means is independent of the cassette's advancing and descending operations. It is designed to function continuously, and for this purpose, a link mechanism is used as the cassette posture regulating means, and a mechanism composed of a swing link, a guide groove, and a bottle member is used as the guide means, and both are connected. When combined, the number of parts can be reduced and the reliability of operation can be improved.

An embodiment in which the present invention is applied to a helical scan type device will be described below with reference to the drawings.

FIG. 1 is a plan view of a VTR equipped with the apparatus of the present invention.

In FIG. 1, a sub-board 2 is fixed on a VTR mechanical system board l. Mounted on the sub-board 2 are various members constituting the tape running system of the VTR. These will be explained step by step. In the figure, below the sub-board 2 are guide rollers 3a and 3b, which are tape drawer guide members.
Diagonal posts 4a and 4b are provided. These are fixed on the slider members 5a, 5b. After the cassette loading operation is completed, the slider member 5a is removed by the tape pull-out mechanism provided on the lower surface of the sub-board 2.

5b moves along guide grooves 6a, 6b provided in the sub-board 2, and stops when the support shafts of guide rollers 3a, 3b contact positioning members 7a, 7b. When the cassette loading operation is completed, the tape is moved to the tape drawer guide members 3a, 3b, 4a.
, 4b and the head drum 8, and is pulled out from the cassette and wound around the head drum 8 as the slider members 5a and 5b move. A post 9 is fixed on the sub-board 2 on the right side of the head drum 8. An erasing head 11 and an impedance roller 12 are fixed via a base member 10 which is rotatable around this post 9. On the sub-board 2 on the left side of the head drum 8, there is a boss 1.
3 is fixed.

A partial erasing head 15 and an audio/control head 16 are fixed via a base member 14 which is rotatable about this post 13. Furthermore, a fixed guide post 17% capstan 18 is provided below it, and a pinch roller 21 is provided via a base member 20 that is rotatable about the post 19.

In addition to the above-mentioned members, there are reel stands 22a22b on the board 1.
can be freely rotated.

The above is the arrangement of the main members constituting the tape running system. Next, the configuration of an embodiment of the uninvented cassette loading device is as follows.
This will be explained using FIGS. 1, 2, 3, and 4. In these figures, the stage frame 23 of the cassette is arranged on the cassette insertion side of the substrate 1 (lower side in FIG. 1). A pair of stopper means 24a is provided above the stage frame.

24b is provided. A pair of spring members 25a and 25b are provided on the lower upper surface of the stage frame 23. Pin members 26a, 26 are provided on both sides of the stage frame 23.
linker 27a via b.

27b are rotatably connected. link par 278
．． A pin member 28a is provided at the center of 27bδ.

Other linkers 29a and 29b are rotatably connected to each other via 28b. Link par 29a.

Pin members 30a and 30b are coupled to one end of 29b. The pin members 30a, 30b are inserted into long holes 31a, 31b (31a is not shown) provided on the side surface of the stage frame 23, and are connected to each other so that they can rotate and slide freely. Link par 27a.

Among the ends of 27b, 29a, and 29b, stage frame 2
A pin member 32a is located on the opposite side of the end connected to the side surface of 3.
, 32b, 33a, and 33b are combined. Pin member 32
a, 33a and 32b, 33b are brackets attached to the sides of the substrate 1) 34a.

It is inserted into the elongated holes 35a and 35b of 34b and is connected to rotate and slide freely. At this time, 27g of Su-Nkuba, 29
a, 27b, and 29b are arranged so as to cross each other as shown in FIG.

Another L-shaped long hole 3 is installed in the brackets 34m and 34b.
6m, 36b are provided. These long holes 36a, 86
A pin member 3 fixed to the side surface of the stage frame 23 is shown in b.
7a and 37b are slidably inserted. Pin member 3
7a and 37b are further inserted into elongated holes 39a and 39b (39a is not shown) provided in rotation links 38a and 38b, and are connected to rotate and slide freely. The rotation links 38a, 38b are rotatably fitted to shafts 40a, 40b fixed to the brackets 34a, 34b. The shafts 40a and 40b are further provided with partially toothed gears 41a and 41b.
are fitted. The rotating link 38a and the partially toothed gear 41a and the rotating link 38b and the partially toothed gear 41b are the partially toothed gear 4.
The toothless portions 1a and 41b are mutually rotatable. Pin member 42 fixed on partially toothed gear 418.41b
a.

42b (42a not shown) and pivot link 38
Spring members 43a and 43b (43a is not shown) are arranged between the cut and raised portions provided in a and 38b. As a result, the rotation links 38a and asb are normally the spring members 43a.

43b has a shape in which they are mutually erected in one direction by the tensile force. The partially toothed gears 41a and 41bK.

A synchronous gear 44a is fixed to both ends of a synchronous shaft 43 that is rotatably attached to the brackets 34a and 34b.
, 44b are engaged with each other. A worm wheel 45 is fixed to the further end of the synchronous shaft 43 passing through the synchronous gear 44b. In FIG. 3, a motor bracket 46 is fixed on the bracket 34b below the worm wheel 45. As shown in FIG. This motor bracket 46 allows the motor 4 to
7 and a worm shaft 48 are supported. A worm gear 49 is fixed to the worm shaft 48.

This worm gear 49 is the worm wheel 45 shown earlier.
It is interlocked with. Belt pulleys 51 and 52 are fixed to the ends of the rotating shaft 50 of the motor 47 and the worm shaft 47. A belt 53 is wrapped around belt pulleys 51 and 52.

The operation of one embodiment of the cassette loading device of the present invention constructed as described above will now be described.

In FIG. 1, the cassette is inserted into the stage frame 23 in a direction parallel to the drawing from the bottom of the drawing, and the insertion position is defined by stopper means 24a and 24b at the back of the stage frame 23. At the same time as the insertion, the cassette is pressed against the lower surface of the stage frame 23 by spring members 25a and 25b provided on the upper surface of the stage frame 23 and is fixed. After the insertion is completed, the presence or absence of the cassette is detected, and the motor 47 starts rotating. In FIG. 3, the rotation of the motor 47 is caused by a rotating shaft 50,
Belt 7'-IJ51. Belt 53. Belt pulley 52
, is transmitted to the worm gear 49 via the form shaft 47. The rotation of the worm gear 49 is decelerated to a predetermined speed and transmitted to the worm wheel 45, and further to the synchronous gear 44a via the synchronous shaft 43.

44b. Further, the rotation of the synchronous gears 44a, 44b is transmitted to the partially toothed gears 41a, 41b.

The partially toothed gears 41a and 41b are rotated by a spring member 43a.

It is transmitted to the rotation links asa and asb via 43b. Due to the rotation of the rotation links 38m and 38b, the elongated hole 3
Bottle member 37a and slotted hole 3 sandwiched between 6a and 39a
The bottle member 37b sandwiched between 6b and 39b starts moving along the long lengths 36a and 36b, respectively. Since the bin members 37a and 37b are fixed to the side surfaces of the stage frame 23, as the bin members 37a and 37b move, the stage frame 23 and the cassette inserted into the stage frame 23 also move into the elongated hole 36a. , 36b.

In FIG. 3, the bottle members 37a and 37b are connected to the long holes 36
g, 36 bOL type O angle @t'T: When moving,
Accordingly, the moving direction is changed by 90' due to the long holes 36a and 36bK,
Start descending towards the substrate 1. At this time, the lower notch of the stage frame 23 in FIG.
, 22b, and the reel hole positions of the cassette in the stage frame 23 also match. In FIG. 3, the bottle member 37m.

When 37b moves to the ends of the elongated holes 36a and 36b, the reel of the cassette inside the stage frame 23 will move.

The syspulley frame 23 is stopped by means of a stopper fitted to the reel stands 22a, 22b and further provided on the substrate 1, and the bin members 37a, 37b and the rotation links 38a, 38b are also stopped. However, the partially toothed gear 41a,
41b is still driven by the motor 47, and when one end surface of the toothless portion comes into contact with the rotation links 38a, 38b, the motor 47 stops, and the toothless gears 41a, 41t also stop. At this time, the spring members 43g and 43b are stretched by a predetermined amount. Due to the force generated at that time, the stage frame 23
is pressed against the stopper means on the substrate 1 described above.

In addition, in this stopped state, since the rotational force of the motor 47 is transmitted by the worm gear 49 and the worm wheel 45,
The self-locking function between the two keeps them intact.

In the above operation, movement of both side surfaces of the stage frame 23 is caused by the synchronization shaft 43 and the synchronization gear 44a.

44b. In addition, the stage frame 23
The posture of the link bars 27a, 29a and 27b, 2
9b, and bottle members 26a and 3 disposed at each end.
0a, 32a, 33a and 26b, 30b, 32b,
33b and the central bin members 28a and 28b are held parallel to the elongated holes 35a and 35b of the brackets 34a and 34b. FIG. 5 shows the form of the linkers 27b, 29b when the stage frame 23 has completed its descent.

The above is an explanation of the operation of loading a cassette, but the operation of removing a cassette can be performed by following the completely reverse operation procedure.

In addition, although the linkers for maintaining the posture are constructed in a shape that intersects with each other in the above-described embodiment, they may be arranged in parallel as shown in FIG. That is, one end of the linker 54.55 is connected to the bin member 57.5 below the side surface of the stage frame 56.
8, they are rotatably connected. Link par 54.5
The other end of 5 is rotatably and slidably connected to an elongated hole 62 of a bracket 61 via a bin member 59, 60. Since the cassette loading operation is exactly the same as in the above embodiment,
Omit explanation. Figure 7 shows the A-5 after the loading is completed.
The state of 4.55 is shown below.

The connection between the pin member at one end of the link bar for posture maintenance and the long part in the 7-ricket is generally shown in FIG.

The mechanism is as shown in FIG. That is, the roller 64 is fitted to a pin 63 caulked to the linker 32a, and an E-ring 65 is fitted to the tip of the pin 63 to prevent the roller 64 from coming off. Bracket) 34a has a roller 6 on the end face of the elongated hole.
4 touches. ↓ to reduce friction when the pin 63 slides in the elongated hole 35a, and also to reduce rotational resistance. If the load on the rotation and sliding of one end of the link bar in the elongated hole is not large, the results shown in Figs. 10 and 11
A configuration as shown in the figure can also be used. That is, the sliding piece 66 and the link bar 67, which are molded from resin, are integrally molded. A hinge 68 made of the same resin is formed at the joint between the two. The sliding piece 66 is attached to the bracket 34
A is inserted into the elongated hole 35a, and slides within the elongated hole 35a as the linker 67 slides. The rotational movement of the linker 67 can be realized by bending the hinge 68.

As described in detail above, according to the present invention, the cassette posture holding mechanism and movement path regulating mechanism during the cassette loading operation are completely separated, so that the reliability of the operation can be improved, and a simple structure with a small number of parts can be realized. It can be configured with a mechanism.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a magnetic recording/reproducing device equipped with an embodiment of the device of the present invention, FIG. 2 is a front view of FIG. 1, and FIG.
4 is a sectional view taken along the line W-■ in FIG. 2, FIG. 5 is a sectional view showing the state after the operation corresponding to FIG. 4 is completed, and FIG. 6 is a parallel A diagram showing another example of the link bar, FIG. 7 is a diagram showing the state after the operation corresponding to FIG. 8 is a plan view of FIG. 8, FIG. 10 is a sectional view of the link bar used in the present invention molded from resin, and FIG. 11 is a plan view of FIG. 10. ■... Board, 8... Head drum, 22a, 22b
...Reel stand, 23-...Stage frame, 27a, 2
7b129m, 29b・-link par, 37a, 3'l
b--Pin member, 38a, 38b... Rotating link,
41a. 41b: partially toothed gear, 43a, 43b: spring member. 43-... Synchronous shaft, 44a, 44b... Synchronous gear Th
34a134b...Bracket. ￥11 Diagram ■2 Diagram F ″1fJ3 Diagram

Claims (1)

[Claims] 1. In a magnetic recording and reproducing device that records and reproduces signals on an air outlet cage wound inside a cassette, there is a gripping frame that grips the cassette, and a gripping frame that is connected to the magnetic recording and reproducing device. The gripping frame includes a driving means for moving the gripping frame to a predetermined position, a guiding means for restricting a moving path of the gripping frame, and an attitude regulating means for restricting the posture of the gripping frame during the movement process of the gripping frame. Characteristic cassette loading device. 2. The guiding means, the posture regulating means, and the driving means are individually arranged on the parts located on both sides of the gripping frame of the cassette, and this pair of means is provided with a synchronizing means for synchronizing them,
2. The cassette loading device according to claim 1, wherein said pair of means operate in conjunction without any connection. 3. The posture regulating means is composed of cross-shaped link bars rotatably connected to each other, one end of which is rotatably connected to the gripping frame of the cassette, and another end adjacent to this connecting end. is rotatably and slidably connected to the gripping frame of the cassette, and the other end of the bar is rotatably and slidably connected to a guide plate fixed to a substrate in the magnetic recording/reproducing device. A cassette loading device according to claim 1 or 2. 4. The posture regulating means is composed of two link bars rotatably connected to two positions of the cassette gripping frame, and the other end of these link bars is a guide plate fixed to the board in the magnetic recording and reproducing device. The cassette loading device according to claim 1 or 2, characterized in that the two link bars are rotatably and slidably connected to each other, and the two link bars are arranged in parallel. 5. A patent characterized in that the link bar is molded from resin, and one end of the link bar is provided with a hinge part that can bend freely, and the degree of freedom of rotation at the connection point between the one end part of the link bar and another member is provided by the hinge part. A cassette loading device according to claim 3 or 4. 6. The guide means is composed of a guide bin member fixed to the gripping frame of the cassette, and a guide groove provided in a guide plate fixed to a substrate in the magnetic recording/reproducing device, and the guide bin member is regulated by the inner groove. 3. The cassette loading device according to claim 1, wherein the cassette gripping frame moves along a predetermined path when the cassette is moved. 7. The driving means is composed of a pin member fixed at a portion close to the guide groove on the guide plate, and a swing link provided to be swingable around the bottle member. The other end is slidably connected to a guide bin member fixed to the gripping frame of the cassette via a guide groove on the guide plate in the normal direction of the swinging motion, and the cassette movement path defined by the guide groove is connected to the guide bin member fixed to the grip frame of the cassette. 3. The cassette loading device according to claim 1, wherein the cassette loading device is configured such that the cassette can be loaded by a series of connected movements of the swinging links regardless of the shape.