JP2002100088A - Cassette loading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cassette loading device low in cost, improved in transport efficiency, capable of preventing the falling-off of a cassette holder and capable of reducing the number of production processes. SOLUTION: A base plate 95 of a cassette holder 90 has a fitting part formed on the same plane as the holder 90 and the holder 90 is guided to the guide grooves provided on the side faces 13 and 14 of a chassis 11 by means of three guide posts. In such a constitution of the cassette loading device, the transport efficiency is improved and a half-cut treatment is applied to the fitting part of an arm assembly 120 for decreasing the number of production processes. The stopper part of the holder 90 is locked at the lock part formed on the face 14 of the chassis 11 and the falling-off of the holder 90 is prevented. Furthermore, the holder 90 is pressed to the bottom surface 12 of the chassis 11 by a compression spring provided on a bracket 97 of the assembly 120. Thus, an inexpensive constitution of the cassette loading device is attained by means of the compression spring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cassette loading device for loading a tape cassette in a magnetic recording / reproducing device such as a video tape recorder.

[0002]

2. Description of the Related Art Conventionally, VTR (Video Tape Recorder)
In some cases, a front loading method is adopted in which a tape cassette is inserted substantially horizontally from the front surface of a housing and loaded. In the front loading method, when a tape cassette is inserted into the cassette holder from the front of the housing, the cassette holder moves to the tape loading device, and the cassette tape is loaded into the tape loading device. When the tape cassette is set at a predetermined position, the tape in the tape cassette is pulled out by the tape loading device.

In the helical scan system, a tape drawn from a tape cassette is wound around a cylinder. That is,
The tape loading device has a pair of tape pull-out members (hereinafter, referred to as sliders) that pass from near the tape cassette to near one end of the cylinder and move to near the other end of the cylinder. And the tape is wound around the cylinder. As a result, recording and reproduction on the tape can be performed.

The cassette holder employed in the front loading system is composed of a bottom plate and brackets connected to the left and right sides of the bottom plate. The tape cassette is held by the bottom plate and the bracket. For example, a cassette loading apparatus including a cassette holder has been proposed in Japanese Patent Application No. 10-350288.

In the cassette holder in this proposal, the bottom plate of the cassette holder and the left and right brackets are fixed with screws. Since screwing is used, the number of parts is large, and the assembling workability is poor. Therefore, there is a cassette holder in which both ends of the bottom plate are bent at a right angle so that the left and right brackets are press-fitted from above and below the bottom plate.

However, when the bottom plate of such a cassette holder is transported as a single component, there is a problem that the bottom plate is bulky due to the bent portions at both ends, resulting in poor transport efficiency.

The cassette holder moves along a guide groove provided in a guide plate of the chassis. That is, a guide post is provided on the bracket of the cassette holder at the front and rear, and the guide post is inserted into two guide grooves provided on the guide plate and slid to enable horizontal transfer of the cassette holder. ing. Therefore, a total of four guide grooves are formed on the left and right guide plates of the chassis.

However, since it is necessary to dispose other members on the guide plate, it is necessary to increase the size of the guide plate in order to form four guide grooves in the guide plate.

When assembling the cassette holder in the guide groove, the guide post is guided to the guide groove through a notch provided in the guide plate. The notch is formed on the chassis front side of the horizontal transfer start position of the cassette holder.

However, there has been a problem that the cassette holder may be further moved to the front side of the chassis than the horizontal start position during the set transportation, and the cassette holder may come off the guide plate.

Incidentally, the cassette holder is driven in a horizontal direction along the guide groove by an arm assembly for transmitting the rotational force of the loading motor. Further, the arm assembly vertically moves the cassette holder along the guide groove, and mounts the cassette on the reel base. In this case, the cassette is pressed against the reel base by a torsion spring provided on the arm assembly.

[0012] However, the pressing force of the cassette on the reel base is obtained by an expensive torsion spring, which increases the cost.

The arm assembly includes left and right arms and a plate connecting these arms. However, a punched burr surface is formed at the edge portion of the plate, and when connecting the plate and the arm portion, it is necessary to apply a C-plane processing to the punched burr surface.

[0014]

As described above, the above-described conventional cassette loading apparatus has a problem that the bottom plate of the cassette holder is bulky during transportation. Further, it is necessary to form four guide grooves, and in consideration of the arrangement of other members, there is a problem that the left and right guide plates become large and bulky during transportation. There is also a problem that the cassette holder may be detached from the guide plate during transportation. Further, since the cassette is crimped by the torsion spring, there is a problem that the cost is increased. Also,
When connecting the arm part of the arm assembly and the plate,
There is also a problem that it is necessary to perform C-plane processing on the plate, which increases the number of processes and increases the cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and by making the bottom plate substantially flat and press-fitting the brackets from both ends of the bottom plate, it is possible to reduce the cost and prevent bulkiness during transportation. It is an object to provide a cassette loading device.

Further, the present invention provides three guide grooves for horizontal transfer, thereby facilitating the arrangement of other members, making it possible to reduce the size of the guide plate. An object of the present invention is to provide a cassette loading device that can prevent bulkiness.

Further, according to the present invention, by providing a stopper portion on the cassette detecting lever to prevent the cassette holder from moving from the horizontal start position to the front of the chassis,
It is an object of the present invention to provide a cassette loading device capable of preventing a cassette holder from coming off a guide plate.

Another object of the present invention is to provide a cassette loading device which can be configured at a low cost by enabling a cassette to be pressed against a reel base by a compression spring.

Further, the present invention provides a cassette loading apparatus which can reduce the number of steps by eliminating the C-plane processing at the time of assembling the arm assembly by subjecting the plate end to drawing or half-cutting. The purpose is to do.

[0020]

According to a first aspect of the present invention, there is provided a cassette loading apparatus comprising: a bottom plate on which a tape cassette is mounted; and a pair of brackets attached to both ends of the bottom plate for holding the tape cassette. And a cassette holder formed at both ends of the bottom plate so as to be substantially flush with the bottom plate and constituted by a pair of fitting portions fitted into the bracket. The cassette loading device according to the present invention is a chassis having a bottom plate on which a tape cassette is placed, a pair of brackets attached to both ends of the bottom plate and holding the tape cassette, and a bottom surface and both side surfaces. Transferring the cassette holder stored at the front end side of the chassis to the rear end side of the chassis, and further moving the cassette holder to the bottom side. A pair of first guide grooves formed on one side surface of the chassis for feeding and guiding two guide posts provided on one of the pair of brackets, and are housed at a front end side of the chassis. In order to transfer the cassette holder to the rear end side of the chassis and further to the bottom side, it guides one guide post formed on the other side of the chassis and provided on the other of the pair of brackets. A cassette loading device according to a fourth aspect of the present invention, comprising a second guide groove, and a bottom plate on which a tape cassette is placed, and attached to both ends of the bottom plate to hold the tape cassette. A cassette holder including a pair of brackets, a chassis having a bottom surface and both side surfaces, and the cassette housed from the front side of the chassis Guide grooves formed on both side surfaces of the chassis for transferring the rudder and into which guide posts provided on the pair of brackets are inserted, and a guide groove of the cassette holder before the tape cassette is inserted into the cassette holder. A stopper for preventing transfer of the cassette to the rear end of the chassis by detecting insertion of the tape cassette into the cassette holder and preventing transfer of the cassette to the rear end of the chassis; A locking portion formed on one side,
A locking portion provided on the stopper portion and locked by the locking portion to prevent the cassette holder from moving toward the front side of the chassis;
The cassette loading device according to the present invention is a chassis having a bottom plate on which a tape cassette is placed, a pair of brackets attached to both ends of the bottom plate and holding the tape cassette, and a bottom surface and both side surfaces. A guide groove formed on both sides of the chassis for transferring the cassette holder housed from the front side of the chassis, and a guide post provided in the pair of brackets is inserted into the guide groove; An arm assembly for driving the cassette holder to move the cassette holder to a predetermined position along the same; and crimping means for crimping the cassette holder to the bottom side of the chassis using a compression spring provided on the arm assembly. The cassette loading device according to claim 8 of the present invention holds a tape cassette. A pair of brackets for driving the cassette holder along guide grooves provided on both sides of the chassis having a bottom surface and both side surfaces, and a half-cut fitting portion at both ends; Has an arm assembly constituted by a plate fitted into the pair of brackets and connecting the pair of brackets.

According to the first aspect of the present invention, the cassette holder is constituted by fitting portions provided at both ends of the bottom plate into the pair of brackets. The fitting portion is substantially flush with the bottom plate, and the occupied portion of the bottom plate including the fitting portion in the height direction is substantially defined by the thickness.

According to a third aspect of the present invention, a pair of first guide grooves are formed on one side surface of the chassis, and one second guide groove is formed on the other side surface. In the cassette holder, two guide posts provided on one bracket are guided by a pair of first guide grooves, and one guide post provided on the other bracket is guided by a second guide groove. Be transported. Only one second guide groove is formed, and the occupation amount on the other side surface of the chassis is small.

According to a fourth aspect of the present invention, the stopper detects that the tape cassette has been inserted into the cassette holder, and releases the blocking of the transfer of the cassette holder to the rear side of the chassis. The stopper part is provided with a locking part,
The locking portion prevents the cassette holder from moving toward the front side of the chassis, thereby preventing the cassette holder from falling off.

According to a fifth aspect of the present invention, the tape cassette is held by a cassette holder, and the cassette holder is transported by an arm assembly while being guided in guide grooves formed on both side surfaces of the chassis. The crimping means crimps the cassette holder against the bottom surface of the chassis using a compression spring provided on the arm assembly.

According to the eighth aspect of the present invention, the arm assembly is formed by fitting the fitting portion of the plate into the pair of brackets. The fitting portion has a half cut at both ends of the plate, so that the fitting portion can be easily fitted.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view of a magnetic recording / reproducing apparatus in which a cassette loading apparatus according to an embodiment of the present invention is incorporated, as viewed from above. FIG.
FIG. 2A is a view seen from above, with the cassette holder removed from FIG. 1, and FIG. 2B is a view seen from the side in the direction A in FIG. FIG. 3 is an explanatory diagram showing FIG. 1 viewed from another direction, and FIG. 3A is a diagram viewed from the back.
FIG. 3B is a diagram viewed from the side in the direction B in FIG.

In FIGS. 1 to 3, the chassis 11 comprises:
It has a bottom surface 12 and both side surfaces (guide plates) 13 and 14, and a cylinder 22 is arranged on the bottom surface 12. The cylinder 22 is provided rotatably with a predetermined inclination angle with respect to the chassis 11.

A supply hub and a take-up hub (not shown) are provided in a tape cassette (not shown), and the tape is wound around these hubs and accommodated therein. On the chassis 11, a supply reel table 23 and a take-up reel table 2 are provided.
4 is rotatably mounted on a shaft implanted on the chassis 11, and the cassette loading hub and the take-up hub are respectively connected to the supply reel table 23 by cassette loading.
And the take-up reel table 24. The rotation of the capstan motor 28 is transmitted to the supply reel table 23 and the take-up reel table 24 via the gear box 25, and the supply reel table 23 and the take-up reel table 24 are rotatable according to the operation mode.

When the cassette loading is completed, the tape take-out surface of the tape cassette is moved to the cylinder 22 by the cassette loading mechanism described later.
Is arranged at a position facing the peripheral surface of the. On the other hand, when the cassette loading is completed, a pair of guide grooves that guide the movement of the sliders 3 and 4 that are tape pull-out members to a portion that passes from near the position of the cassette holder 90 to near the front end of the cylinder 22 and to near the rear end of the cylinder 22. 1 and 2 are formed on the chassis 11. Slider 3,
The guide groove 4 is guided by the guide grooves 1 and 2 to move between a base end position of the guide grooves 1 and 2 near the front end of the cassette holder 90 and a terminal end position of the guide grooves 1 and 2 near the rear end of the cylinder 22. It is slidable.

The sliders 3 and 4 are configured by attaching rotatable guide rollers 26 and 27 to shafts each having a flange. When the tape cassette is inserted into the housing and cassette loading is completed, the slider 3,
4 is located near the front end of the cassette holder 90. At this time, the guard panel on the front of the tape cassette opens, and the back of the tape in the cassette half (surface opposite to the magnetic recording surface)
The peripheral surfaces of the guide rollers 26 and 27 of the sliders 3 and 4 are located at the positions.

When the cassette loading is completed, the supply hub is freely rotatable so that the tape can be pulled out from the tape cassette. That is, when the sliders 3 and 4 move toward the rear end of the cylinder 22 along the guide grooves 1 and 2 while the tape is in contact with the peripheral surfaces of the rear ends of the guide rollers 26 and 27, the tape is taped. It is drawn out of the cassette and travels while being guided by guide rollers 26 and 27. When the tape is running, the guide rollers 26 and 27 are provided with flanges at both ends thereof.
The tape is prevented from coming off the guide roller.

More specifically, on the tape traveling path, there are disposed a cylinder 22, various poles for defining the traveling path, various heads for performing magnetic recording and reproduction, and the like. A guide roller 27, a supply tape guide pole 31, a tension pole 32, a take-up tape guide pole 33, a guide roller 26, a capstan roller 34, and a guide pole 35 are disposed near the guard panel when the cassette loading is completed. When the cassette loading is completed, the rear surface of the tape bridged between the supply hub and the winding hub in the tape cassette faces the rear end of these peripheral surfaces. The guide roller 27 and the guide pole 31 move simultaneously with the slider 4, and the guide roller 26 and the guide pole 33 move simultaneously with the slider 3.

An erasing head 40 and a guide pole 36 are provided beside the guide groove 2, and an ACE head 41 and a guide pole for forming an audio track and a control track are provided beside the guide groove 1. 37 are provided. Further, a pinch roller 38 is also provided facing the capstan roller 34.

After the cassette loading is completed, the sliders 3 and 4 move to the rear end side of the cylinder 22 along the guide grooves 1 and 2 so that the tape is pulled out from the supply hub, and the guide pole 36, the full width erasing head 40, It is wound around the peripheral surface of the cylinder 22 via the guide roller 27 and the supply-side tape guide pole 31, and further, the take-up side tape guide pole 33, the guide roller 26, the head 41, the guide pole 37, the capstan roller 34 and the pinch roller 38 and are wound on a winding hub via a guide pole 35.

The tension pole 32 moves to the vicinity of the guide pole 36 during the movement of the slider 4, and comes into contact with the back surface of the tape so that the tape tension can be adjusted. When the tape loading is completed, the pinch roller 38 moves to the capstan roller 34 side so that the tape can be pressed against the peripheral surface of the capstan roller 34 on the peripheral surface.

The pinch roller 38 is rotatable, and rotates with the tape interposed when the capstan roller 34 rotates according to the rotation of the capstan motor 28. Thereby, the tape can be transported. As shown in FIG. 3, the rotation of the capstan motor 28 is
6 is also transmitted. The pulley clutch 46 transmits the rotational force of the capstan motor 28 to the supply reel table 23 and the take-up reel table 24 via the gear box 25. As a result, the tape can be run according to various modes.

The tape loading is performed by using the rotational force generated by a loading motor 51 disposed on the side surface 14 of the chassis 11. The rotational force of the loading motor 51 is transmitted to the worm 80.
A rotatable worm wheel 5 is provided on the side of the chassis 11.
2 are provided to transmit force to the FL cam gear 81. A joint gear 53 meshing with the FL cam gear 81 is rotatably provided on the rear surface of the chassis 11. A cam switch drive gear 54 meshing with the joint gear 53 is rotatably provided on the rear surface of the chassis 11. The rotational force of the loading motor 51 is transmitted from the worm 80 to the cam switch drive gear 54 via the worm wheel 52, the FL cam gear 81, and the joint gear 53.

Hook 5 provided on the back of chassis 11
A slider cam 57 is slidably attached to each of the sliders 5 and 56. The slider cam 57 is a plate-like member having a shape corresponding to the mode, and meshes with the cam switch drive gear 54 by teeth formed linearly on one end side. The slider cam 57 moves to a horizontal position according to the rotation of the cam switch drive gear 54.

A loading drive gear 58 is provided between the base ends of the guide grooves 1 and 2 so as to be rotatable around a shaft 59 implanted in the chassis 11. The loading drive gear 58 meshes with teeth formed linearly on the other end of the slider cam 57, and rotates in accordance with the linear movement of the slider cam 57. First and second arms 60, 61 are provided between the guide grooves 1, 2 on the opposite side of the loading drive gear 58 from the meshing portion with the slider cam 57.

The first and second arms 60 and 61 are rotatably provided by shafts 66 and 67 implanted in the chassis 11. The first arm 60 has a gear portion 63 having teeth formed on a part of a disk, and an arm portion 62 integrally formed with the gear portion 63. The second arm 61 has a gear portion 65 in which teeth are formed in a part of a disk, and an arm portion 64 formed integrally with the gear portion 65. Gear 63,
Numerals 65 mesh with each other and rotate in mutually opposite directions.

A cutout gear 68 integrally formed on the surface of the gear portion 63 is provided coaxially with the gear portion 63. The notch gear 68 meshes with a tooth 69 formed on a part of the outer periphery of the loading drive gear 58. The rotation of the loading drive gear 58 causes the gear 63 to rotate, and the gear 65 also rotates.

At the ends of the arms 62 and 64, connecting members 7 are respectively provided.
One end of each of the shafts 2 and 73 is pivotally mounted on the shaft. Connecting member 7
The other ends of the sliders 2 and 73 are pivotally mounted on engaging portions 7 and 8 provided at the rear ends of the sliders 3 and 4, respectively. At the rotation end position of the loading drive gear 58 at the start of tape loading, the arm portions 62 and 64 of the first and second arms 60 and 61 have the distal ends located near the base ends of the guide grooves 1 and 2 and the sliders. The reference numerals 3 and 4 are adapted to stop at the base ends of the guide grooves 1 and 2.

The slider 4 is integrally formed with a stop member 75 protruding toward the surface of the chassis 11. When the sliders 3 and 4 are located at the base ends of the guide grooves 1 and 2, the stop member 75 is provided. 75 contacts the tension arm 76.
Unloading stopper 7 on the surface of chassis 11
9 is provided to project from the tension arm 76.
The unloading stopper 79 prevents movement of the slider 4 in the unloading direction. That is, the position of the guide roller and the tape guide at the time of unloading is defined by stopping the slider 4 in a state where the stop member 75 is in contact with the tension arm 76 and the unloading stopper 79.

The loading motor 51 drives not only the tape loading mechanism but also the cassette loading mechanism. That is, the side surface 14 of the chassis 11
A front loading cam gear (hereinafter referred to as FL cam gear) 81 meshed with the worm wheel 52 is rotatably provided. The rotational force of the loading motor 51 is transmitted through the worm 80 and the worm wheel 52 to F
The power is transmitted to the L cam gear 81.

Hook 8 provided on side surface 14 of chassis 11
A front loading drive slider (hereinafter, referred to as an FL drive slider) 82 is slidably attached to a locking portion 84 at the tip of the rotating shaft of the 3 and FL cam gear 81.

The FL drive slider 82 is a plate-like member having a shape corresponding to the mode, and has a guide pole 85 planted toward the surface of the FL cam gear 81. A guide groove 86 is formed on the surface of the FL cam gear 81, and a guide pole 85 implanted in the FL cam gear 81 is engaged with the guide groove 86 and slid, whereby the FL cam gear 81 rotates. Thus, the FL drive slider 82 can be slid. FL drive slider 8
A cutout portion 87 that engages with the engaging portion 92 of the arm assembly 120 is formed at the end of the second arm.

An arm assembly 120 described later is swingable about a shaft 141 provided on the side surface 14 of the chassis 11, and the FL drive slider 82 slides to move the engaging portion 92 in the front-rear direction of the chassis 11. By moving, it swings around the axis 141. A guide post 107 of a cassette holder 90 described later is inserted into the engagement groove 127 of the arm assembly 120.
The cassette holder 90 is driven in the horizontal and vertical directions by the swing of.

FIG. 4 is an explanatory view showing the cassette holder 90 in FIG. FIG. 4A is a view as seen from above, as in FIG. 1, and FIG. 4B is a view as seen from the direction C in FIG. , FIG.
FIG. 4C is a view from the bottom side, and FIG. 4D shows the relationship with the side surface 14 of the chassis 11. FIG. 5 is an exploded view of the cassette holder 90 shown in FIG. 4, and FIG.
5A to 5F are views of the left bracket viewed from above, a view of the left bracket viewed from the direction D in FIG. 5A, a view of the bottom plate viewed from above, and a view of the bottom plate viewed from the cassette insertion port side. , The right bracket viewed from above, and the right bracket shown in FIG.
It is the figure seen from the direction.

The cassette holder 90 includes a bottom plate 95, a left bracket 96, and a right bracket 97. The bottom plate 95 has a flat plate shape, and fitting portions 98 and 99 are provided at both ends.
Are formed. The fitting portions 98 and 99 are formed without being bent on the same plane as the center of the bottom plate 95.
On the other hand, fitting portions 100 and 101 into which fitting portions 98 and 99 of the bottom plate 95 can be fitted respectively on the left and right brackets 96 and 97.
Are formed.

As shown in FIG. 4, the fitting portion 9 of the bottom plate 95
8 and 99 are the fitting portions 1 of the left and right brackets 96 and 97, respectively.
The cassette holder 90 is formed by press-fitting and fitting into 00 and 101.

In this embodiment, the left bracket 96 has a pair of front and rear guide posts 105 and 106.
Whereas only one guide post 107 is planted on the right bracket 97. The guide posts 105 and 106 are provided on the side surface 13 of the chassis 11.
Are slidably inserted into a pair of guide grooves 112, 1 respectively.
11 is formed, while the side surface 1 of the chassis 11 is formed.
4, only one guide groove 113 into which the guide post 107 is slidably inserted is formed.

The guide grooves 111 to 113 are provided in the chassis 1
1 is a groove formed through both side surfaces 13 and 14,
It extends in the horizontal direction on the upper side of the side surfaces 13 and 14, and extends vertically downward on the rear end side of the chassis 11. Guide post 10
5 and 106 are inserted into guide grooves 112 and 111, respectively, and guide post 107 is inserted into guide groove 113.
The guide posts 106, 105, and 107 are provided with guide grooves 111.
, The cassette holder 90 is moved horizontally from the cassette insertion port side, and further, the cassette holder 90 is moved vertically downward at the rear end side of the chassis 11 so that the bottom plate 95 of the cassette holder 90 is moved to the chassis. 11 can be positioned near the bottom surface 12.

Since only one guide groove 113 is provided on the side surface 14, and no guide groove is formed on the rear end side of the side surface 14, other members can be arranged in this portion. The side surfaces 13 and 14 can be reduced. For example, the height of the side surfaces 13 and 14 can be made lower than before.

FIG. 4 (c) shows the bottom surface of the right bracket 97.
As shown in FIG. 7, the stopper portion 110 is attached rotatably about a shaft 135. A stopper 131 is provided at one end of the stopper 110. The projection 131 has a hook 132 formed on the side opposite to the cassette insertion port side. Protrusion 13
1 has a slope formed on the surface opposite to the hook 132 from the front end, and a locking portion 133 is provided on the end side of the slope. The locking portion 133 has a surface parallel to the hook 132.

The spring member 13 is provided at one end of the stopper 110.
6, one end of the spring member 136 is attached to the bottom surface of the right bracket 97. Spring member 1
Reference numeral 36 generates an urging force for rotating the stopper 110 in the clockwise direction in FIG. That is, the spring member 136 is
An urging force is generated in a direction toward the outside of the right bracket 97 from the protrusion 131 of the stopper 110.

The side surface 14 of the chassis 11 is formed with a notch forming a locking portion 118 at a position corresponding to the stopper portion 110. The protrusion 13 is formed by the spring member 136.
1 is urged to the outside of the right bracket 97, the hook 132 of the projection 131 is locked to the rear end side of the locking portion 118 on the chassis 11, and the locking portion 133 is locked to the locking portion 11.
8 is locked to the front end side of the chassis 11.

An arm assembly 120 is employed for horizontally transferring the cassette holder 90 and further vertically transferring the cassette holder 90 to press the cassette holder 90 against the chassis 11. FIG. 6 is an explanatory diagram showing the arm assembly 120 in FIG. 6A is a view of the arm assembly as viewed from the direction F in FIG. 1, FIG. 6B is a view as viewed from the direction G in FIG. 6A, and FIG. 6
It is the figure seen from H direction of (a). FIG. 7 is an exploded view of the arm assembly 120 of FIG. 6, and FIGS. 6 (a) to 6 (f) are views of the left bracket viewed from the cassette insertion port side, and FIG. View from the I direction of
FIG. 8 is a view of the plate viewed from above, a view of the plate viewed from the cassette insertion port side, a view of the right bracket viewed from the cassette insertion port side, and a view of the right bracket viewed from the J direction in FIG.

The arm assembly 120 includes a plate 121,
It is constituted by a left bracket 122 and a right bracket 123. The plate 121 has a flat plate shape, and both ends are fitted into fitting portions 124 and 125 of the brackets 122 and 123 to connect the left and right brackets 122 and 123.

The cassette holder 9 is attached to the left bracket 122.
An engagement groove 126 into which the guide post 105 of the left left bracket 96 is inserted is provided. The engagement groove 126 has an elongated shape corresponding to the horizontal and vertical movement of the guide post 105. That is, the guide post 105 of the cassette holder 90 is engaged with the engagement groove 1 of the arm assembly 120.
26 and guide groove 11 provided on side surface 13 of chassis 11
2 at the same time.

On the other hand, the right bracket 123 is provided with an engaging groove 127 into which the guide post 107 of the right bracket 97 of the cassette holder 90 is inserted. Engagement groove 12
Reference numeral 7 denotes an elongated shape corresponding to the movement of the guide post 107 in the horizontal and vertical directions, and an insertion port for inserting the guide post 107 is provided at the upper part. That is, the guide posts 107 of the cassette holder 90 are simultaneously inserted into the engagement grooves 127 of the arm assembly 120 and the guide grooves 113 provided on the side surface 14 of the chassis 11. As described above, the arm assembly 120 moves the shaft 1 fixed to the side surface 14 of the chassis 11 by moving the engagement portion 92 in the front-rear direction of the chassis 11 by the FL drive slider 82.
It swings around 41.

In the engagement groove 127, a wide space is formed in the thin portion 12
8, one side surface in the short direction has rigidity, and the other side surface is elastically deformed by the thin portion 128. Thin portion 128 and engagement groove 12
A compression spring 129 is provided between the compression spring 129 and the thick portion on the opposite side of the reference numeral 7. The compression spring 129 divides the thin portion 128 into the engagement groove 12.
Energize in the direction of 7. Accordingly, when the bracket 123 has its longitudinal direction substantially parallel to the bottom surface 12 of the chassis 11, the compression spring 129 causes the guide post 107 in the engagement groove 127 to move through the thin portion 128 to the bottom surface 1 of the chassis 11.
It is designed to press to two sides.

In order to enable elastic deformation, the thin portion 12
8 is extremely thin. For this reason, the thin portion 1
It is also possible that 28 is broken from the root. Even in this case, in order to prevent the thin portion 128 from coming off,
The bracket 123 has stoppers 145 and 146 at two locations.
Are formed. The thin portion 128 is a stopper 145,1
Arms 147 and 148 are integrally formed at a position facing the arm 46, and the arms 147 and 148 are
By engaging with the 146, the thin portion 128 can be prevented from coming off the bracket 123.

As shown in FIGS. 7 (c) and 7 (d), half cut processing is performed near both ends of the plate 121, and cutout portions 132 and 133 are formed. The notches 132 and 133 are the brackets 122 and 1
23 are formed shorter than the lengths of the fitting portions 124 and 125 in the insertion direction, and the cutout portions 132 and 133 of the plate 121 are formed.
The thickness of the other parts is designed to be substantially equal to the width of the openings of the fitting parts 124 and 125. In addition, the notch 132,
Instead of 133, squeezing may be performed.

Next, the operation of the embodiment configured as described above will be described.

The magnetic recording / reproducing apparatus shown in FIG. 1 is sometimes transported for each component alone. For example, the cassette holder 9
0 may also be transported for each part. The bottom plate 95 of the cassette holder 90 has a fitting portion 9 with the brackets 96 and 97.
8, 99 are not bent and the bottom plate 95 is flat. Therefore, it is possible to prevent the bottom plate 95 from being bulky during transportation. Fitting portions 100, 1 of brackets 96, 97
The cassette holder 90 is assembled by fitting the fitting portions 98 and 99 of the bottom plate 95 into the base plate 01 in the longitudinal direction of the bottom plate 95, respectively.

The arm assembly 120 is mounted on the fitting portions 124 and 125 of the brackets 122 and 123 with the plate 12.
1 is assembled by fitting both ends. Burrs are generated at both edges of the plate 121. However, the thin cutouts 132 and 133 are formed by half-cut processing or the like that becomes convex on the burr generation surface, and the dimensions of both ends including the burr are smaller than the opening dimensions of the fitting parts 124 and 125. Therefore, even if burrs are generated, the plate 12 can be formed without processing both ends of the plate 121 on the C-plane.
1 can be fitted into the brackets 122 and 123 and assembled.

FIG. 2 shows a state before the cassette holder 90 is mounted. The cassette holder 90 includes a left bracket 96.
Guide post 105 is engaged with engagement groove 126 of left bracket 122 of arm assembly 120 and side surface 13 of chassis 11.
Into the guide groove 112 and guide post 106
The guide post 107 of the right bracket 97 is provided in the engagement groove 127 of the right bracket 123 of the arm assembly 120 at the insertion opening 119 provided in the side surface 14 of the chassis 11 in a state in which is inserted into the guide groove 111 of the side surface 13. The guide groove 1 in the engagement groove 127 and the side surface 14 of the chassis 11 from the opening
13, the side surfaces 13, 1
Attached between four.

FIG. 3B shows a state in which the guide post 107 is guided into the engagement groove 127 and the guide groove 113. FIG. 1 shows that the cassette holder 90 is the side 1 of the chassis 11.
The state attached between 3 and 14 is shown. In this state, for example, the cassette holder 90 may move to the front side of the chassis 11 due to transportation or the like. Also in this case, as shown in FIG. 4D, the stopper portion 110 has the protrusion 132 urged to the outside of the right bracket 97 by the spring member 136, and the locking portion 133 is connected to the chassis 11 of the locking portion 118. It is locked on the front end side (upper side in FIG. 4D). This prevents the cassette holder 90 from dropping out of the insertion slot 119.

The hook 132 of the protrusion 131 of the stopper 110 is locked by the lock 118 before the tape cassette is inserted. Thereby, the cassette holder 9
0 is prevented from moving to the rear end side of the chassis 11.

In the state shown in FIG. 1, a tape cassette (not shown) is inserted into the cassette holder 90 and pushed into the rear end side of the chassis 11, whereby the cassette detecting lever 117 of the stopper 110 is pushed by the tape cassette and the stopper 110 rotates, and the hook 132 engages with the locking portion 118.
Get off. As a result, the guide posts 105 to 107 of the cassette holder 90 are
The guide 11 slides while being guided by the guide grooves 112, 111, 113, and is transferred to the rear end side of the chassis 11 in the horizontal direction.

The loading motor 51 is moved by moving the cassette holder 90 to a predetermined position in the horizontal direction.
Starts to rotate. The rotation of the loading motor 51
The power is transmitted to the FL drive slider 82 via the worm 80, the worm wheel 52, and the FL cam gear 81, and slides the FL drive slider 82 toward the rear end of the chassis 11.

As a result, the engaging portion 92 of the arm assembly 120 moves to the rear end of the chassis 11 and the right bracket 1
Reference numeral 23 swings around the shaft 141 so that the upper end moves toward the rear end of the chassis 11. The arm assembly 120 moves the guide posts 105 and 107 along the guide grooves 112 and 113 by the engagement grooves 126 and 127 by swinging the left and right brackets 122 and 123, and transfers the cassette holder 90 horizontally rearward and further vertically. Transfer downward.

The guide grooves for guiding the cassette holder 90 horizontally are formed only at three places on the side surfaces 13 and 14, and the right side surface 14 has room for disposing other members at the rear end side of the chassis 11. . Thereby, the side surface 13,
14 can be reduced, for example, the side 1
The height of 3, 14 can be reduced. Therefore, when the chassis 11 is transported alone, it is possible to prevent the chassis 11 from being bulky.

When the engaging portion 92 of the arm assembly 120 is located closest to the rear end of the chassis 11, the left and right brackets 122 and 123 are in a state where the longitudinal direction is substantially parallel to the bottom surface 12 of the chassis 11. In this state, the compression spring 1
29 urges the thin portion 128 in the direction of the engagement groove 127. In other words, the thin portion 128 is connected to the guide post 10 in the engagement groove 127.
7 is pressed against the bottom surface 12 of the chassis 11. As a result, the cassette holder 90 is pressed against the bottom surface 12 of the chassis 11, and the supply hub and the take-up hub of the cassette are pressed against the reel bases 23 and 24. The cassette can be crimped using an inexpensive compression spring 129.

When the pressure-bonding of the cassette is completed, tape loading for winding the tape around the cylinder 22 is performed by the tape loading device.

As described above, in the present embodiment, the bottom plate of the cassette holder is substantially flat, and the brackets are press-fitted from both ends of the bottom plate to assemble them, thereby being inexpensive and preventing bulkiness during transportation. be able to.

Further, the three guide grooves shift the phase of the cassette holder in the horizontal direction, thereby facilitating the arrangement of other members and making it possible to reduce the size of the guide plate. Inexpensive and bulky during transportation can be prevented.

Further, a locking portion is provided at the stopper portion to prevent the cassette holder from moving from the horizontal start position to the front of the chassis, and to prevent the cassette holder from coming off the side surface of the chassis. .

Further, the cassette is pressure-bonded to the reel base by using an inexpensive compression spring, so that the configuration can be made inexpensively.

Further, drawing or half-cutting is performed to the vicinity of the end of the plate, so that the C-plane processing is unnecessary when assembling the arm assembly, and the number of steps can be reduced.

[0081]

As described above, according to the present invention, by making the bottom plate substantially flat and press-fitting the brackets from both ends of the bottom plate, it is possible to reduce the cost and to prevent bulkiness during transportation. By providing three guide grooves for horizontal transfer, the arrangement of other members is facilitated, the guide plate can be reduced in size, and it is possible to prevent inexpensive and bulky transportation. In addition, a stopper portion is provided on the cassette detection lever to prevent the cassette holder from moving from the horizontal start position to the front of the chassis, thereby preventing the cassette holder from coming off the guide plate. Can be inexpensively constructed by allowing the compression spring to be pressed against the reel base by a compression spring. By performing machining or half-cutting machining, has the effect that upon assembly of the arm assembly eliminates the need for C-plane processing, it is possible to reduce the number of steps.

[Brief description of the drawings]

FIG. 1 is a plan view of a magnetic recording and reproducing device in which a cassette loading device according to an embodiment of the present invention is incorporated, as viewed from above.

FIG. 2 is an explanatory view showing the cassette holder removed from FIG. 1;

FIG. 3 is an explanatory diagram showing FIG. 1 viewed from another direction.

FIG. 4 is an explanatory view showing a cassette holder 90 in FIG. 1;

FIG. 5 is an exploded view of the cassette holder 90 of FIG.

FIG. 6 is an explanatory view showing an arm assembly 120 in FIG. 1;

FIG. 7 is an exploded view of the arm assembly 120 of FIG.

[Explanation of symbols]

11 chassis, 12 bottom, 13, 14 side, 90
... cassette holder, 120 ... arm assembly.

Claims (8)

[Claims] A bottom plate on which a tape cassette is placed; a pair of brackets attached to both ends of the bottom plate for holding the tape cassette; and both ends of the bottom plate formed substantially flush with the bottom plate. A cassette holder comprising a pair of fitting portions fitted into the bracket. 2. The cassette loading device according to claim 1, wherein the bracket is fitted with the bottom plate from a longitudinal direction of the bottom plate. 3. A cassette holder comprising: a bottom plate on which a tape cassette is mounted; and a pair of brackets attached to both ends of the bottom plate to hold the tape cassette; a chassis having a bottom surface and both side surfaces; The cassette holder housed at the front end of the chassis is formed on one side of the chassis for transferring the cassette holder to the rear end of the chassis and further transferring the cassette holder to the bottom side, and is provided on one of the pair of brackets. A pair of first guide grooves for guiding the two guide posts, and the cassette holder accommodated at the front end side of the chassis for transferring the cassette holder to the rear end side of the chassis and further transferring the cassette holder to the bottom side. A second guide groove formed on the other side surface of the chassis and guiding one guide post provided on the other of the pair of brackets. Cassette loading device. 4. A cassette having a bottom plate on which a tape cassette is mounted, a pair of brackets attached to both ends of the bottom plate and holding the tape cassette, a chassis having a bottom surface and both side surfaces, Formed on both sides of the chassis to transfer the cassette holder stored from the front side of the chassis,
A guide groove into which a guide post provided in the pair of brackets is inserted, and a tape cassette that prevents transfer of the cassette holder to the rear end side of the chassis before the tape cassette is inserted into the cassette holder. A stopper portion for detecting insertion of the cassette holder into the cassette holder and releasing the transfer of the cassette holder to the rear end side of the chassis; a locking portion formed on one side surface of the chassis; A cassette loading device, wherein the locking portion is provided on the chassis and is locked by the locking portion to prevent the cassette holder from moving toward the front side of the chassis. 5. A cassette holder comprising: a bottom plate on which a tape cassette is mounted; and a pair of brackets attached to both ends of the bottom plate to hold the tape cassette; a chassis having a bottom surface and both side surfaces; Formed on both sides of the chassis to transfer the cassette holder stored from the front side of the chassis,
A guide groove into which a guide post provided in the pair of brackets is inserted; an arm assembly that drives the cassette holder along the guide groove to transfer the cassette holder to a predetermined position; and an arm assembly provided in the arm assembly. A cassette pressing device for pressing the cassette holder against the bottom surface of the chassis by using a compression spring. 6. The crimping means includes: an engagement groove into which the guide post is inserted; a thin portion partitioning the engagement groove; and the guide post being placed on the bottom surface side of the chassis via the thin portion. The cassette loading device according to claim 5, further comprising a compression spring for pressing. 7. The thin portion has an arm portion, and the crimping means prevents movement of the arm portion in a direction orthogonal to a biasing direction of the compression spring. The cassette loading device according to claim 6, further comprising a stopper for preventing the arm assembly from coming off. 8. A pair of brackets for driving a cassette holder for holding a tape cassette along guide grooves provided on both side surfaces of a chassis having a bottom surface and both side surfaces, and a half-cut fitting portion. And a plate for connecting the pair of brackets with the fitting portions being fitted into the pair of brackets, the cassette loading device comprising: