JPH03160658A - Cassette loading mechanism for recording and reproducing device - Google Patents

Abstract

PURPOSE:To thin a device and to load a cassette by providing a clamper moving with a tray on the tray and excluding the spring means of the clamper from above the tray in a tray ejected state. CONSTITUTION:The clamper 6 is held in a position where a spring means is installed at the inner side of a front panel 11 and a drop-voltage is removed in the ejected state of the tray 4. When cassette loading starts, only the tray 4 horizontally moves and the clamper 6 voltage-drops the cassette on the tray. When cassette loading continues furthermore, the restriction of the clamper 6 is released and it moves to a loading completion position with the tray 4. When the tray 4 comes near a panel opening 12 in the procedure, the clamper 6 stops, only the tray 4 moves to the ejected position and stops at a voltage-drop release position. Consequently, the cassette can be taken out.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is applicable to tape type recording and reproducing devices such as video tape recorders (VTRs) and digital audio tape recorders (DATs). The present invention relates to a tape cassette loading mechanism capable of recording or reproducing signals on a tape cassette.

(Prior Art) Currently, tape cassettes used in VHS type VTRs have the same width of magnetic tape and signal recording format for the magnetic tape, but there are two types of tape cassettes with holes in the size of the casing and the length of the tape. tape cassette, i.e., a standard full-size cassette (hereinafter referred to as "F cassette")
There is also a compact size cassette (hereinafter referred to as "C cassette") that is smaller than the standard.

By loading a C cassette into an adapter, it can be set into a VTR as a standard-sized cassette in the same way as an F cassette, but since the use of an adapter is indispensable and inconvenient, it can be used as both F and C cassettes without an adapter. Development of VTRs that can record and play back information is progressing.

In this type of VTR, the F cassette (
A supply reel stand (l8) and a take-up reel stand (l9) are provided on the chassis (l3) corresponding to both reels of the reel (121), and the C cassette (122) is equipped with only one reel (124) of the reel. It is engaged with and placed on the supply reel stand (l8).

In order to pull out the magnetic tape (120) from these tape cassettes and apply it to the rotating head cylinder (l6), as with conventional VTRs, there are A pair of guides? 1W (14) and (15), the leading guide blocks (21) and (22) are slidably engaged with these guide grooves, respectively, and a tape running route via the cab stan (17) is formed. A tape pull-out lever (23) is provided to remove the tape. Leading guide block (2
1) (22) and the tape drawer lever (23) are driven by a drive mechanism (24) consisting of a loading motor, cam gear, etc.
This allows for reciprocating motion depending on the mode.

When loading the tape, use the leading guide block (2
1) (22) needs to wait at the initial position depending on the size of the tape cassette, and when pulling out the magnetic tape (120) from the C cassette (122), it is necessary to wait at the reel stand (18).
) side (indicated by a solid line in the figure), and when pulling out the magnetic tape (120) from the F cassette (121), move to the rotating head cylinder (16) side and wait at the intermediate position (indicated by the solid line in the figure). (indicated by a broken line). Then, by the operation of the drive mechanism (24), both leading guide blocks (21) and (22) are moved to the rotating head cylinder (l6).
), the magnetic tape (120) is wound around the circumferential surface of the rotary head cylinder (16).

(Problem to be solved) By the way, the F cassette (121) or the C cassette (1
22) to the recording/reproducing position shown in FIG.
It is also possible to adopt a front loading system similar to the TR, but in this case, an inlet for the F cassette (121) and an inlet for the C cassette (122) are provided on the front panel, and the Since a door must be provided, the structure of the front panel and the door opening/closing mechanism become complicated.

Therefore, the applicant proposed a cabinet (1
) The tray (4) is removably arranged in the opening (12) opened in the front panel (11) of
We considered adopting a method in which the cassette 2) is placed thereon and the cassette is transferred together with the tray (4) toward the supply reel stand (l8) and take-up reel stand (l9) inside the cabinet (1).

In this case, the tray (4) includes a placing part A for the F cassette (121) (!: a placing part B for the C cassette (122),
Openings (4a) and (4b) from which the pair of reel stands (18) and (19) should respectively emerge are opened astride both mounting portions.

According to the cassette loading mechanism shown in FIG. 1, the front plate part (8
Since the opening (12) can be closed by 3), the front door in the conventional front loading system becomes unnecessary.

The issue here is the configuration of the clamp mechanism that holds the tape cassette on the tray (4). That is,
If a clamper is provided on the tray (4) integrally with the tray, the clamper on the tray will get in the way when a cassette is placed in the tray ejected state. Furthermore, if a clamping mechanism is provided above the recording and reproducing position at the back of the device, it becomes necessary to provide a complicated clamping mechanism above the horizontal transition path of the tray (4), which poses an obstacle to making the device thinner. Come.

An object of the present invention is to provide a clamper on the tray that is movable together with the tray, thereby making it possible to reduce the thickness of the device, and when placing a cassette in the tray eject state, the clamper is not removed from the tray. To provide a cassette loading mechanism that is set out of the way.

(Means for Solving the Problems) A cassette loading mechanism according to the present invention includes a tray (4
) A clamper (6) equipped with a spring means for lowering the tape cassette on the tray (4) is engaged with the tray (4) so as to be movable relative to the tray (4) at least within a certain range in the horizontal direction. As a result, the clamper (6) is placed between the cassette lower pressure position where the spring means is installed on the cassette mounting part and the lower pressure release position where the spring means is moved away from the lower pressure position toward the back of the apparatus. can be moved back and forth.

A first stopper (35) is provided near the front panel opening (12). The stopper has an opening (1
2) toward the eject position.
), the clamper (6) is placed in the standby position where the spring means of the clamper (6) is housed in the deep part of the front panel (12).
).

Further, in order to restrict the movement of the clamper (6) in the cassette loading direction, the clamper (6) is restrained at the standby position or a position near it during the horizontal movement of the tray (4) from the eject position to the loading completion position. In addition, a clamper control mechanism is provided which releases the restraint when the clamper (6) is placed in the lower pressure position with respect to the tray (4).

(Function) When the tray (4) is in the ejected state, the clamper (6) hits the stopper (35) and the front panel (11
) is held at a standby position with spring means installed inside the tray (4), and is set at a lower pressure release position with respect to the tray (4).

Therefore, the spring means does not get in the way when placing the cassette on the tray.

When cassette loading is started, the tray (4) moves horizontally toward the back of the device, but during this process, the clamper (3) is held at or near the standby position by the operation of the clamper control mechanism, and the tray Only (4) moves.

This causes the clamper (6) to be placed in the lower position with respect to the tray (4), and as a result, the cassette on the tray is pressed down by the spring means of the clamper (6) and is clamped onto the tray. .

After that, when cassette loading continues, the clamper (6) is released from the clamper control mechanism as the tray (4) moves, and the clamper (6) moves together with the tray (4) to the loading completion position. .

In the process of cassette unloading, when the tray (4) reaches a position near the front panel opening (12), the clamper (6) moving together with the tray moves to the stopper (3).
5), it will be held in the standby position.

After that, the tray (4) continues to move toward the eject position, but the clamper (6) remains held at the standby position, and is finally set at the lower pressure release position with respect to the tray (4). As a result, the cassette can be taken out.

(Effects of the Invention) According to the cassette loading mechanism according to the present invention, since the clamper can be provided on the tray, the device can be made thinner, and in the tray eject state, the spring means of the clamper is attached to the tray. Since the cassettes are removed from above, there is no problem in placing the cassettes on the tray.

(Example) Hereinafter, an example in which the present invention is implemented on a VTR capable of recording and reproducing both F cassette and C cassette sizes of the HS system will be described in detail with reference to the drawings.

It should be noted that the examples are for illustrating the present invention, and should not be interpreted as limiting or reducing the scope of the invention described in the claims.

FIG. 1 shows the external appearance of the VTR in the cassette ejected state. Inside the cabinet (1), a rotating head cylinder (16), a supply reel stand (18), a take-up reel stand (19), etc. are installed, and a co-supply reel stand (l8) and a take-up reel stand are also installed. (19), a gear (1) integrally formed with the take-up reel of C cassette (122)
A drive gear (10) is provided to mesh with 23). A tray assembly (3) is retractably disposed in an opening (12) formed in the front panel (11).

As will be described later, the tray (4), which is a constituent member of the tray assembly (3), includes a placement section B for the C cassette (122) inside a placement section A for the F cassette (121), and also includes a placement section B for the C cassette (122).
The openings (4a) (4b) from which the respective reel stands (19) (18) should emerge correspond to both reels of the cassette (121).
).

As shown in FIGS. 6 and 7, the tray assembly (3) includes the tray (4), a rack plate (5) integrally attached to the tray (4), and a tape cassette on the tray (4). The clamper (6) that should lower the pressure, and the tray (4)
) for opening the tape cassette opening/closing lid, and a slide member (8) for guiding the horizontal and vertical movement of the tray (4) and the rack plate (5), the slide member (8) is supported in a reciprocating manner by a supporting side plate (3l) fixed on the chassis.

First, each component of the tray assembly (3) will be explained.

-L upper tray (4) is the F cassette (4) as shown in Figures 3 and 4.
Inside the placing part A of the C cassette (121), a step part (40
) is recessed, and the stepped portion (40) allows the C cassette (12
2) is formed.

The placing section B has a plurality of bins (40a) for positioning the C cassette (122), preventing erroneous insertion, and detecting the cassette.
) is provided protrudingly. Further, the tray (4) has side plates (41) (41) erected on both sides of the F cassette mounting portion A, the side plates having substantially the same height as the F cassette (121). Note that a pin (not shown) is also provided protruding from the mounting portion A of the F cassette (121) to prevent erroneous insertion of the cassette.

The side plate (41) has a first pin (42) as shown in FIG.
, a driven pin (43) and a second pin (44) are provided to protrude outward. Also, on the side plate (41), there is an opener (7).
A guide recess (45) is formed for regulating the rotational posture of the opener (7), and a first guide wall (46) is provided on the inner bottom surface of the guide recess (45) with a horizontal surface to prevent rotation of the opener (7). ), and a second guide wall (47) that extends from the first guide wall (46) at a low slope toward the back of the device and is supposed to allow rotation of the opener (7). Furthermore, the side plate (4l) has a long hole (48) above the guide recess (45).
) is opened in the horizontal direction, and in front of the long hole (48) (left side in the figure), on the extension line of the long hole (48),
A locking piece (49) for hooking one end of a spring (77), which will be described later, is provided to protrude outward.

As shown in FIGS. 3 and 4, rack plates (5) are provided on both sides of the tray (4). As shown in FIG. 7, the rack plate (5) has a rack part (51) formed on the lower end surface, and a high horizontal part (52) and an inclined part (52) in the center of the side surface.
3) and a guide groove (50) consisting of a lower horizontal portion (54)
and each pin (42) of the tray (4).
(43) A circular hole (55) where (44) can be inserted closely.
(56) and (57) have been established.

The rack plate (5) is connected to the pins (42) (4) of the tray (4).
3) The circular holes (55) (56) (
By fitting the tray (57), the tray (4
) is assembled in one piece.

1ΣZ method 2J At the top of the tray (4), both rack plates (5
) (5) is provided. The clamper (6) has side plate parts (6) on both sides of the top plate part (61).
2) (62), and these side plate parts (62) are extended forward to form an arm part (63) as shown in FIG.

The side plate portion (62) has a low horizontal portion (64) and an inclined portion (65).
) and a high level horizontal part (66), and the end of the arm part (63) is provided with a guide groove (60) for guiding the rack plate (5). Pin (67) to engage M (50)
protrudes inward. Further, on the top plate portion (6l), a protruding piece (68) is cut and raised upward, and a plate spring piece (69) for directly applying downward pressure to the cassette is provided as a third piece.
There are three locations as shown in the figure.

The clamper (6) guides the pin (67) to the rack plate (5) as shown in FIG. In addition to engaging M (50), the guide? The second bin (44) of the tray (4) is engaged with the M (60) to be assembled so as to be movable relative to the tray (4) and the rack plate (5).

As shown in FIGS. 3 and 4, an opener (7) is mounted on the tray (4). The opener (7)
Arms (74) are provided protruding forward on both sides of a horizontally long shielding plate (70) that can close the opening (12) of the front panel (l1). Also, a shielding plate (
On the lower end surface of 70), there is a lid locking piece (71) close to the right arm (74) for opening the opening/closing lid of the F cassette.
, a lid locking piece (72) for opening the opening/closing lid of the C cassette is formed approximately in the center by bending toward the front.Furthermore, on the lower end surface of the shielding plate (70), A U-shaped contact piece (73) for receiving the F cassette is protrudingly provided near the F cassette lid locking piece (71).

When the F cassette (121) is placed, the corresponding piece (73) enters through a notch provided in the opening/closing lid of the cassette and comes into contact with the casing body.

Therefore, if the F cassette (121) is pushed in in the wrong direction, the contact piece (73) may
Place the F cassette (121) on the tray (
4) It will no longer be possible to set it in the correct position above.
This prevents the cassette from being inserted incorrectly.

There is a locking piece (76) on the arm (74) of the opener (7).
is provided to protrude outward, and the end surface of the arm (74) is processed into an arc shape to form a cam surface (75) that protrudes slightly upward from the upper end surface of the shielding plate (70). ing.

The opener (7) attaches the locking piece (76) to the tray (
4) is slidably engaged with the elongated hole (48) and is attached to the tray (4) so as to be movable and rotatable relative to the tray (4). As a result, the opener (7) on the tray (4) can reciprocate between a first position shown by a solid line and a second position shown by a confused line in the cassette eject state shown in FIG. Opener (7) shielding plate (70)
is the C cassette (122) on the tray (4) in the first position.
) on the tray (4) in the second position.
It will face the opening/closing lid of the cassette (121).

Also, as shown in Fig. 7, the locking piece (76) of the opener (7)
) and the locking piece (49) of the tray (4) is provided with a spring (77), so that the opener (
7) is urged toward the first position, that is, the front end of movement. This allows the arm (7) of the opener (7) to
4) is the guide recess (45) of the tray (4) as shown in Figure 3.
) will be accommodated.

Left 94 Goki Kashu U Tray (4) and both rack plates (5) as shown in Figure 3
A slide member (8) is provided surrounding (5).

The slide member (8>) has rack plates (5) (5) on both sides of the front plate part (83) that should face the end surface of the F cassette (121) on the tray (4) on the opposite side from the opening/closing lid. There are grooves forming side plate portions (81) (81) that extend toward the rear of the device along the sides.

A second rack part (82) is formed on the lower end surface of the side plate part (81) and extends along the first rack part (5l) formed on the rack plate (5) as shown in FIG. There is.

A straight guide groove (84) extending horizontally is formed on the outer surface of the side slope portion (8l), and a pair of L-shaped guides (front and rear) are formed on the inner surface of the side plate portion (81). M(85)(86)
is expressed. Further, the rack plate (5) is provided on the inner surface.
An engagement bin (87) is located at a position opposite to the driven bin (43).
) protrudes inward.

Furthermore, the upper end surface of the side slope part (8l) is a top plate (34), which will be described later.
A high level horizontal plane (8
1a), a slope (8lb) and a lower horizontal surface (81c) are formed.

The first pin (42) and the second pin (4) of the tray (4)
4) are the L-shaped guide grooves (85) of the slide member (8), respectively.
) (86) so as to be slidable on the slide member (86).
), the horizontal and vertical movements of the tray (4) and rack plate (5) are guided.

3l and stopper '' As shown in Fig. 4, on the chassis (13) on which the supply reel stand (l8) and the take-up reel stand (l9) are installed, there are
A pair of left and right support side plates (31) (31) are installed on both sides of both slide members (8) (8), and these support side plates (31) (31) are immovable relative to the chassis (13). Can be assembled. The support side plate (31) has a sixth
As shown in the figure, the linear guide groove (84) of the slide member (8)
) A pair of front and rear bottles (32) (33
) is provided to protrude inwardly, thereby causing the slide member (8
) is guided in horizontal movement relative to the support side plate (3l).

Furthermore, a top plate (34) is provided above the support side plates (31) (31), at a position above the clamper (6) as shown in FIG. 4, and extends across both support side plates. . Top plate (3
4) are provided with downward supporting pieces (36) at the ends on the side of the cassette inlet as shown in FIG.
is pivotally supported by a pin (37) protruding from the supporting side plate (31), and can rotate freely around the pin. Top plate (34
) on the lower surface of the slide member (8).
) is formed with a protrusion (34a) that can be slidably contacted.

Further, on both sides of the top plate (34), projections (38) are formed at the ends opposite to the support pieces (36), and the projections (38)
) and a projection (39) formed on the support side plate (3l), a spring (150) is placed in tension to bias the top plate (34) clockwise. The top plate (34) has support side plates (31
) is prevented from rotating in the inclined position in which it hits the slope (31a) recessed in the upper end surface.

Further, on the top plate (34), there is a protrusion (68) of the clamper (6).
), a stopper (35) is cut and raised downward, and a window (35) facing the stopper is formed.
0) has been established.

The tray assembly (3) assembled as described above is
It is supported by the support side plates (31) (31) and is arranged so as to be retractable into the opening (12) of the front panel (11) as shown in FIG.

Next, the tray drive mechanism (9) drives the tray assembly (3) to transport the tray cassette from the eject position to the recording/playback position on the reel stands (18) (19).
) will be explained.

Tray 9 As shown in FIG. 5, on the chassis (13) there is a pinion (110) rotationally driven by a loading motor (not shown), a large-diameter gear part (102) that meshes with the pinion (110), and a small-diameter gear part (102) that meshes with the pinion (110). An intermediate gear (100) having a gear portion (101), a small diameter gear portion (
A tray drive mechanism (9) equipped with a lever gear (91) etc. that meshes with the tray drive mechanism (91) is provided. The pinion (110) can be simultaneously engaged with the rack part (51) of the rack plate (5) and the rack part (82) of the slide member (8) as shown in FIG.

The lever gear (9l) has a three-layer structure in the tooth width direction as shown in FIGS. 8(a), (b), and (c), and has a gear portion ( 92), the gear part (92
) is provided with a drive lever (93) protruding inside the first
A part of the lever (91a) with a recessed groove part (94), a gear part (
On the outside of the disk portion (92), there is a disk portion (92) in which a second groove portion (95) is recessed.
9lb) is formed. The first groove portion (94) includes a first drive cam portion (96) that is inclined with respect to the radial line of the lever gear (9l), and a second drive cam portion (97) that extends continuously from the cam portion in the radial direction. ). or,
The second full part (95) is connected to a first guide part (98) that overlaps with the starting end of the second drive cam part (97) of the first groove part (94), and extends on the same circumference from the first guide part. Extending second guide part (9
9). The shape of the first driving cam part (96) of the first full part (94) will be described later.

On the surface of the lever part (91a) of the lever gear (9l),
As shown in FIGS. 5 and 8(b), a torsion spring (90) is provided toward the second drive cam portion (97) of the first full portion (94). The torsion spring (90
) is for pressing down the tray (4) toward the loading completion position when cassette loading is completed, as will be described later.

The lever gear (9l) is disposed between the side slope part (62) of the crankshaft (6) and the side plate part (8l) of the slide member (8), as shown in FIG. by this? The lever part (91a) of the bar gear (91) is installed at a position where it can engage with the driven pin (43) of the tray (4) as the tray (4) moves, and the lever part (91a) of the lever gear (9l) is installed at a position where it can engage with the driven pin (43) of the tray (4). The disk portion (9lb) is installed at a position where it can engage with the retaining pin (87) of the slide member (8) as the slide member (8) moves. These engaging operations will be described later.

L helmet plate■■■劃A As shown in Figure 5, on the chassis (13), the tape on the tray (4) is placed behind the C cassette lid locking piece (72) of the opener (7). A lid opening member (130) is installed to fully open the opening/closing lid of the tape cassette from a half-open state as the cassette is vertically lowered. The top surface of the lid opening member (130) is highly tilted slightly toward the rear.

Also, on the chassis (13), when cassette loading is completed, the C cassette (122) on the tray (4) is lifted from the top of the tray to achieve the same tape height as the F cassette (121). Positioning seat for (140)
is provided.

Below, along FIGS. 9 and 10 (a) to (o),
The operation of the force set loading mechanism described above will be explained separately for each purpose of operation. In addition, in FIGS. 10(a) to (0), chain lines indicate both the state in which the F cassette (121) is placed on the tray (4) and the state in which the F cassette (121) is placed on the tray (4). Indicated by

For example, in FIGS. 10(j) to (o), the leading guide block (
2l) are shown on the right side for the F cassette (121) and on the left side for the C cassette (122).

Tape Cassette Well 1 Figure 9 shows the tray assembly (3) in the ejected state, with the tray (4) being ejected from the opening in the front panel (11). The top plate (34) has a protrusion (34a) located at a lower horizontal surface (81c) of the upper end surface of the slide member (8).
In this state, the projection (68) of the clamper (6) penetrates deeply into the window (30) of the top plate (34) and hits the stopper (35). As a result, the clamper (6) is attached to the cabinet (1).
remains within. Also, the second pin (44) of the tray (4)
) is engaged with the left end of the lower horizontal part (64) of the clamper (6).

The opener (7) is biased by a spring (77>) and installed at the front moving end (first position) where the locking piece (76) hits the front end of the elongated hole (48) of the tray (4). The opener (7) also has a cam surface (
75) hits the first guide wall (46) of the tray (4) and is prevented from rotating clockwise.

In this state, the front panel (1) is placed on the tray (4).
An opener (7) is located opposite the opening (12) of 1).
A shielding plate (70) is installed, and the passage leading from the space above the tray (4) through the opening (12) into the cabinet (1) is blocked by the shielding plate (70). Therefore, foreign objects can enter the cabinet (1) from the opening (12).
Intrusion into the interior is prevented. Note that the shielding plate (70) and the opening (12) are separated from each other, and the opening (12) is not completely blocked by the shielding plate (70). ) The intrusion of foreign matter larger than the distance between the two is reliably prevented. Also, small foreign objects can be moved along the top surface of the tray (4) and removed from the cabinet/soto (
1) Falling inward is prevented.

When loading and unloading the C cassette (122) on the tray (4), place the C cassette (122) on the C cassette (122) placement section D as shown in Figure 3.
Since the entire surface of the C-cassette soto (122) is exposed, it is only necessary to push the C case/soto (122) into the stepped portion (40) from directly above.

As a result, the lower end surface of the opening/closing lid (126) of the C cassette/soto (122) engages with the tip of the C cassette lid locking piece (72) of the opener (7), as shown in Figure 9. .

On the other hand, when loading the F cassette (121) onto the tray (4), as shown in Figure 3, the shielding plate (70) of the opener (7) ) are installed, so (121A) (121B
) (121C), insert the F cassette/soto diagonally upward into the tray (4), and at this time, the end of the cassette will cover the shielding plate (70) of the opener (7).
Push the F cassette (121) to the back of the device against the spring (77), and place the F cassette (121) on the cassette/soto placement part B of the tray (4).
Place it above. In this process, the arm (74) of the opener (7) separates from the first guide wall (46) of the tray (4) and moves above the second guide wall (47) that slopes low toward the rear, This allows clockwise rotation of the arm (74). Therefore, the opener (
7), the shielding plate (70) is pressed by the F cassette (121I3) and once rotates clockwise as shown by the feed line, and as a result, the F cassette lid locking piece (7l) of the opener (7) ) will be secured to the opening/closing lid (125) of the cassette. When the F cassette (121C) is completely installed on the tray (4), the opener (7
) rotates counterclockwise together with the F cassette, and the shielding plate (70) assumes the upright position again. Even in this state, the F cassette lid locking piece (7l) remains engaged with the cassette opening/closing lid (125).

Due to the loading operation of the F cassette (121), the opener (7) moves to the rear moving end (second position) on the tray (4).
, and the locking piece (76) engages the elongated hole (4) of the tray (4).
8) will engage with the rear end.

? ]■y} Amount 1B Contains As shown in Fig. 5, in the cassette eject state, the pinion (110) of the slide member (8) is connected to the rear and back plate (5).
The rack part (51) of the slide member (8) and the rack part (82) of the slide member (8) are simultaneously engaged with each other, and the tray (4) and the slide member (8) are integrally driven by clockwise rotation of the pinion (110). and move backwards in the horizontal direction.

This state is shown in FIGS. 10(a) to (f).

In this process, the lever gear (9) is passed through the intermediate gear (100).
l) is rotated clockwise, and the rotation and tray (4
), the driven pin (43) of the tray (4) engages the lever gear (9l) as shown in Fig. 10(d) and (e).
The drive lever (93) is engaged with the subsequent lever gear (93).
The tray (4) is pushed toward the back of the apparatus by driving the drive lever (93) in conjunction with the rotation of the tray (91).

At this time, in the process from FIG. 10(e) to FIG. 10(f), the tray (4)
), but during this period, the driving force that engages with the driven pin (43)<-(93) is
The shape of the drive cam portion (96) is similar to that of the first drive cam portion (96).
) propulsion speed of tray (4) by itself and pinion (11)
0) It has a shape on the west side that matches the transfer speed of tray (4) by itself, so that the transfer speed of tray (4)
This allows for smooth movement.

At the time shown in FIG. 10(f), the La Sok section (
82) (51) will be separated from the pinion (110). Also, at this time, the driven pin (4) of the tray (4)
The engagement pin (87) of the slide member (8) located at a position overlapping with the first guide part (98) of the lever gear (91)
get stuck in.

Thereafter, as shown in FIGS. 10(g), (h), and (i), by further clockwise rotation of the lever gear (9l), the driven pin (43) is moved from the first driving cam part (96) to the second driving cam part (96). At the same time as fitting into the cam part (97), the engagement pin (87) is fitted from the first guide part (98) to the second guide part (99). During this process, the driven pin (43) and the engagement pin (87
) begin to shift from each other, causing the tray (4)
Thereafter, the slide member (8) and the slide member (8) will move differently.

That is, the slide member (8) has the retaining pin (87) in the first position.
It is driven rearward by the guide part (98), and as shown in FIG.
Retract to the rear moving end shown in i) and press the slide member (8
The front end of the linear guide groove (84) of the supporting side plate (
It hits the pin (32) of 3l) and stops. With the subsequent rotation of the lever gear (9l), the retaining pin (87)
As shown in FIG. 10(f) to (o), the second guide part (99
), and the engagement locks the slide member (8) at the rearward movement end.

On the other hand, in the tray (4), the driven bin (43) is driven to the rear by the second drive cam part (97), and further
After horizontal movement as shown in Figures (g) to (k), the first
The tape cassette on the tray (4) descends vertically as shown in Figure 0 (1) to (o), and finally, as shown in Figure (o), the tape cassette on the tray (4) is placed on the reel stand (18) (19) on the chassis (13). It reaches the loading completion position. In this process, the horizontal movement of the tray (4) is such that the first and second pins (42) (44) of the tray (4) are connected to the L-shaped guides t# (85) (86) of the slide member (8). The vertical movement of the tray (4) is guided by sliding along the horizontal part of the tray (4).
2) Is (44) both guides? iV7 (85) (86)
It is guided by moving along the vertical part of the

As shown in FIG. 5, the first drive cam part (96) and the second drive cam part (94) of the lever gear (91)
The shape of the first groove portion (94) is such that the intersection point P between the arcuate locus T of the boundary point of 97) and the circumferential locus S of the driven pin (43) of the tray (4) is formed at only one location. is designed. Therefore, the driven pin (43) is connected to the first driving cam portion (96
), and the second half of the trajectory S is driven only by the second drive cam part (97), and the first drive cam part (96) does not engage with the driven pin (43) again.

This corresponds to the driven pin (
43), that is, the horizontal component of the driving force for the tray (
This means that the driving force for 4) will be sufficiently large. That is, if the first drive cam part (96) were to engage with the driven bin (43) in this process, the first drive cam part (96) would be tilted more forward than the second drive cam part (97). Since the robot assumes a posture, the component force in the horizontal direction becomes smaller. This also applies when ejecting the cassette.

During the vertical descent of the tray (4) shown in FIGS. 10(n) to (o), the F cassette (121) on the tray (4)
are both reel stands (19) (18) on the chassis (l3)
After that, the tray (4) is further inserted into the same figure (o).
descend to the lower end of C cassette (
122) is placed, the C cassette (122) is placed.
) is inserted into the supply reel stand (l8).

In addition, in the state shown in (o) of the same figure, the bottom of the C cassette (122) is lifted higher than that of the F cassette (121) by the positioning seat (140) on the chassis (l3), and the tape is held at a predetermined tape height. is set.

When the cassette loading is completed as shown in FIG. 10(o), the lever gear (9l) rotates with a slight overstroke, and is driven by the elastic force of the torsion spring (90) disposed on the lever gear (9l). The bin (43) is pressurized downward and the tray (4) is securely held at the lower end.

Furthermore, as shown in Fig. 3, the driven pins (
43) (43) is provided protruding from the approximate center of the side surface of the tray (4), so when the cassette loading is completed,
No biased external force acts on the cassette, and the stability of the cassette is good.

In the process shown in FIGS. 9 and 10 (a) and (b) of the cassette crank, the cassette on the tray (4) is moved under the leaf spring piece (69) of the clamper (6) waiting at the most advanced position. Sneak into.

In the state shown in FIG. 10(a), the leaf spring piece (69) is slightly elastically deformed and presses down the tape cassette with a relatively small first load. In the process shown in FIGS. 10(a) to 10(b), as the tray (4) moves, the tray (4)
) the second pin (44) of the clamper (6) guide groove (
The clamper (60) moves from the lower horizontal part (64) to the higher horizontal part (66) via the inclined part (65).
) pin (67) is the guide M (50) of the rack plate (5)
The upper horizontal part (52) passes through the inclined part (53) and engages with the lower horizontal part (54). This causes the clamper (6) to descend relative to the tray (4).

In the process from FIG. 9 to FIG. 10(b), the tray (4)
The second pin (44) of the clamper (6) is inserted into the guide groove (6) of the clamper (6).
0), the clamper (6)
receives the pressing force in the backward direction and moves back slightly, but as shown in Fig. 10(a), the protruding piece of the clamper (6) (
68) hits the inner peripheral edge of the window (30) of the top plate (34), and further backward movement is prevented.

The blocking action is achieved by the second bottle (44) as shown in FIG. 10(e).
continues until just before reaching the terminal end of the guide groove (60).

As the clamper (6) descends, the leaf spring piece (69) further elastically deforms in the state shown in FIG. 10(C), and the tray (4)
) on the tape cassette with a second load greater than the first load.
It will be under pressure due to the load. As a result, the tape cassette is securely clamped onto the tray (4). In addition, the F cassette (121) has three leaf spring pieces (69) shown in Fig. 3.
(69) By (69), C cassette (122)
is caused by the two leaf spring pieces (69) (69) on the left side,
It will be under pressure.

Further, in the process of transition from FIG. 10(b) to FIG. 10(c), as the slide member (8) moves backward, the protrusion (34a) of the top plate (34) touches the lower horizontal surface of the side plate (81). (81c)
The top plate (34) rides up the slope (stb) to the higher horizontal surface (81a), and accordingly, the top plate (34)
50) in a counterclockwise direction.

When the top plate (34) reaches the end of rotation in the counterclockwise direction, that is, the top plate (34) reaches a horizontal position, the protrusion (68) of the clamper (6) and the top plate (34) window (
30) The inner peripheral edges are separated from each other, the restraint on the clamper (6) is released, and thereafter the tray (4) and the clamper (6) move horizontally and vertically as one.

As described above, the structure in which the top plate (34) is rotated by the movement of the slide member (8) provides a clamper control mechanism, i.e., a stopper, that regulates the movement of the clamper (6) in conjunction with the horizontal movement of the tray (4). A mechanism is constructed.

Cassette Lid No. 1 Release As shown in Figure 9, place the F cassette (12L) on the tray (4).
Or by setting the C cassette (122),
In the case of the F cassette (121), the locking piece (7l) of the opener (7) engages with the opening/closing lid of the cassette, and in the case of the C cassette (122), the opening/closing piece (7l) engages with the opening/closing lid of the cassette.
The locking piece (72) of 7) will be engaged.

In this state, as shown in FIG. 10(a), the tape cassette on the tray (4) moves back together with the opener (7), and the arm (74) of the opener (7) reaches a position below the clamper (6).

Therefore, when the clamper (6) is subsequently lowered as described above, the cam surface (75) of the arm (74) is pushed down by the top slope of the clamper (6) as shown in FIG. ) rotates counterclockwise from the first rotational attitude shown in FIG.

Along with this, the opening/closing lid of the tape cassette is opened to a half-open state as shown in FIG. 10(b).

This state is maintained during the period of horizontal movement shown in FIGS. 10(b) to (k), and in this process, the F cassette (121)
, C cassette (122), the magnetic tape in the cassette does not come into contact with the leading guide block (2l) on the chassis that constitutes the tape loading mechanism, but passes above it with an extremely small gap. and pass.

Cassette Lid 2 The tape cassette on the tray (4) is the F cassette (121
), the C cassette lid locking piece (72) of the opener (7) comes into contact with the lid opening member (130) on the chassis (13) at the same time as the horizontal movement shown in FIG. 10(k) ends. , in the case of the C cassette (122), the C cassette lid locking piece (72) of the opener (7) hits the lid opening member (1) on the chassis (l3) during the vertical descent shown in FIG. 10(m).
30).

Then, as the tray (4) descends, the opener (7) further moves from the intermediate rotational position to the position shown in FIG. 10 (0).
Rotate counterclockwise to the second rotational position shown in . As a result, the lid of the tape cassette is fully opened as shown in (0) of the same figure.

The operation of ejecting the cassette after re-recording and reproducing the cassette is performed by reversing the loading mode and performing the operation opposite to the above-described cassette loading operation, that is, the operation from FIG. 10(0) to FIG. 9.

In this case, in the process of transitioning from FIG. 10(c) to FIG. It will be a hit. As a result, subsequent horizontal movement of the clamper (6) is prevented, and even in the ejected state of FIG. 9, the clamper (6) remains retained within the cabinet. Therefore, the clamper (6) does not get in the way when taking out the ejected F cassette (121).

Furthermore, in the process of transitioning from FIG. 10(b) to FIG. 10(a), the clamper (6) rises relative to the tray (4), so the clamping load is reduced from the second load to the first load. The subsequent tray ejection operation is performed smoothly.

To take out the F cassette (121) on the tray (4) in the cassette eject state shown in FIG. 9, the rear part of the cassette on the front panel side can be pushed down with a finger. As a result, the cassette rotates clockwise around the opener (7), the front part of the cassette lifts up, and the cassette is further pushed diagonally forward by the opener (7), which is biased by the spring (77), so that the cassette can be removed. is easy.

According to the above-mentioned VTR, loading of the cassette, opening of the cassette opening/closing lid, clamping onto the tray, etc. is performed by a common mechanism, regardless of whether the tape cassette is an F cassette (121) or a C cassette (122). As a result, the structure of the entire device becomes simpler than before, and it is possible to reduce the size and weight of the device.

The above description of the embodiments is for illustrating the present invention, and should not be construed to limit or reduce the scope of the invention described in the claims. Further, it goes without saying that the configuration of each part of the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the technical scope of the claims.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of a VTR equipped with a cassette loading mechanism that allows a tray to move in and out, FIG. 2 is a plan view showing a schematic configuration of the tape loading mechanism, and FIG. 3 is a cassette loading mechanism according to the present invention. 4 is a front view of the same as the above, FIG. 5 is a partially cutaway side view of the same as the above, FIG. 6 is a partially exploded perspective view of the tray assembly, and FIG. 7 is the tray assembly. FIG. 8(a) is an exploded perspective view showing each component of the lever gear, FIG. 8(a) is a side view of the outside of the lever gear, FIG. 8(b) is a side view of the inside of the lever gear, and FIG. 8(C) is a main part of the lever gear. An enlarged perspective view showing
FIG. 9 is a partially cutaway side view showing the cassette loading operation onto the tray, and FIGS. 10(a) to 10(0) are diagrams illustrating a series of cassette loading operations. (11)...Front panel (3)...Tray assembly (5)...Rack plate (7)...Opener (8)...Slide member (9)...Tray drive mechanism (121 )...F cassette (12)...Opening (4)...Tray (6)...Clamper (70)...Shielding plate (31)...Support side plate (9l)... Lever gear (122)...C cassette

Claims (1)

[Scope of Claims] [1] A tray (4) equipped with a tape cassette placement part is provided so as to be retractable into the opening (12) of the front panel (11), and the tray (4) is moved by a tray drive mechanism. (9)
In a cassette loading mechanism of a recording and reproducing apparatus, the tray ( 4) A spring means is provided to press down the upper tape cassette, and is engaged with the tray (4) so as to be movable relative to the tray (4) at least within a certain range in the horizontal direction, and the spring means is installed on the cassette mounting part. a clamper (6) that can reciprocate between a cassette lower pressure position and a lower pressure release position in which the spring means is moved from the lower pressure position to the back of the apparatus; and a part near the front panel opening (12). The aperture (
12) toward the eject position.
4), the clamper (6) is placed in the standby position where the spring means of the clamper (6) is housed in the deep part of the front panel (12).
6) for holding the clamper (6) in the process of horizontal movement of the tray (4) from the eject position to the loading completion position; (6) A cassette loading mechanism for a recording/reproducing apparatus, comprising: a clamper control mechanism that releases the restraint when the cassette is placed in the lower pressure position with respect to the tray (4). [2] The clamper control mechanism is arranged so as to be able to approach and separate from the clamper (6) in the standby position, and
), the clamper (6) is received at or near the standby position during the horizontal movement of the tray (4) from the eject position to the loading completion position, and the clamper (6) The cassette loading mechanism for a recording/reproducing apparatus according to claim 1, comprising a stopper mechanism that moves to separate from the clamper (6) when installed at the lower pressure position relative to (4).