JPH06168522A - Cassette loading device in magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To enable the smooth insertion of a cassette into a magnetic recording and reproducing device without being hindered by a cover opener even if this device is placed in any posture. CONSTITUTION:A spring 96 which is stopped at one end to the proper point of a tray base 3 and is advanced into a tray transfer path and is extended at the other end to above a cover opener 7 is disposed on this tray base. This spring 96 engages with the tray 2 and energizes the cover opener 7 in a closing direction when the tray moves relatively in a loading direction in the tray base 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape reproducing apparatus using a magnetic tape as a recording medium, such as a VTR, and a cassette loading method for conveying a magnetic tape cassette from an opening on the front of the apparatus body to a loading position. It relates to the device.

[0002]

2. Description of the Related Art A cover opener forcibly opening a tape-protecting front lid of a cassette when a cassette is inserted onto a tray is provided inside a VTR device. The cover opener pivotally stops a base end of an opener frame in a tray or a tray support member so as to pivot, as described in, for example, Japanese Patent Application Laid-Open No. 2-83747. The opener frame is rotated along the cam surface, at which time the cassette lid is locked and simultaneously rotated in the opening direction.

[0003]

In a conventional cover opener, an opener frame is arranged so as to hang down on the cassette mounting surface of a tray by its own weight, and the front face of a cassette inserted on the tray is received by the opener frame. This structure is not a problem if the VTR is placed horizontally and the cassette is properly inserted, but the actual use of the VTR is not always performed correctly. For example, when the cassette is inserted with the VTR tilted in the front-rear direction, the opener frame opens halfway from the beginning due to its own weight. Therefore, the cassette hits the opener frame in the middle of the insertion, and further insertion of the cassette is hindered, and the usability is poor. The present invention clarifies a loading device in which a cassette can be smoothly inserted regardless of the posture of the VTR.

[0004]

A loading device of the present invention supports a tray (2) having a cassette mounting surface (28) and a tray (2) which is relatively movable in the cassette insertion direction and has an internal structure. Tray support with cover opener (7) on
(3) and a transport mechanism for transporting the tray support (3) from the opening of the main body to the loading position.
At (3), a spring (96) having one end fixed at a proper position on the tray support and the other end entering the tray transition path and extending above the cover opener (7) is provided. When (2) moves relatively in the loading direction in the tray support (3), it engages with the tray and urges the cover opener (7) in the closing direction.

[0005]

In the standby state when no cassette is inserted, the tray (2) is stopped at a position shifted relative to the tray support (3) in the loading direction, so the spring (96) causes the tray (2) to move. It engages with 2) and urges the cover opener (7) in the closing direction. Therefore, the cover opener (7) is pressed by the spring (96) regardless of the attitude of the VTR and projects to the contact position with the cassette when the cassette is in the standby state for insertion. cassette
(9) is always smoothly inserted into the tray and received by the cover opener (7).

When the cassette on the tray is pushed further, the tray support (3) moves in the loading direction,
Since (2) moves toward the opening relative to the tray support (3), the engagement with the spring (96) is released, and the opening operation for the cover opener (7) proceeds as usual.

At the time of taking out the loaded cassette, the tray (2) is conveyed from the loading position to the opening and stopped, and then only the tray support (3) further moves toward the opening. At this time, the tray (2) moves in the loading direction relative to the tray support (3),
The spring (96) is pushed to urge the cover opener (7) in the closing direction so that the cover opener (7) is projected to the position where it hits the cassette, and is held there until the next cassette is inserted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The drawings and the following description refer to 8 mm magnetic tape
Although an example in which the present invention is implemented is shown in R, the present invention can be used in other magnetic recording / reproducing devices. When unloading the magnetic tape cassette (9), the magnetic tape cassette (9) is moved relative to the tray support (3) so that the cassette can be largely projected from the opening of the main body and can be easily taken out. The tray (2) is mounted on the cassette mounting surface of the tray (2) so that the tray (2) and the tray support (3) can be moved as a set so that both side walls (11) ( 11) (see JP-A-2-83747).
The main body (1) is provided with a pair of reel stands (13) and a magnetic head drum (14) corresponding to the cassette loading position on the bottom wall (12), and one side wall (11) of the main body has It is equipped with a DC motor (12) and the motor gear (4
1) is connected to a known tray transfer mechanism via a gear train (42a to 42d) and a relay gear (4).

The transport mechanism comprises a drive gear (5) having a drive arm (52) having a guide hole, and a transmission gear (58) meshing with a tooth surface (51) of the drive gear (5). The drive pin (33) of the tray support (3) protruding from the L-shaped guide hole (15) opened in the side wall (11) is fitted into the guide hole of the drive arm (52) to drive the drive gear ( The drive pin (33) is moved along the guide hole (15) by the forward and reverse rotations of 5), and the tray (2) and the tray support (3) are moved between the opening (not shown) of the main body and the loading position. Is reciprocally transported back and forth. In the following description, the opening side is "front" and the loading direction is "rear". The other side wall (11) of the body (1) is also symmetrically formed with an L-shaped guide hole (15).
And a transfer mechanism is provided, and the transmission shaft (5) of the transmission gear (58) is
9) extends across the body and drives two transport mechanisms on both side walls at the same time.

The tray (2) has tray pins (25) and guide pins (26) projecting from both side walls (24) of the tray mounting surface (28). The tray (2) is fitted between the side walls (31) (31) of the tray support (3), and the guide hole (3
5) Fit the tray pin (25) and the guide pin (26) protruding from the side wall of the tray (2) into the tray (35), and attach the tray support (3).
Inside, the tray (2) is relatively moved within the range of the guide hole (35). On the mounting surface (28) of the tray (2), a cutout hole (21) into which the reel stand (13) fits when being transported to the loading position is opened, and a cassette contact (22) is provided at the tip in the loading direction. It is protruding.

The tray support (3) is provided with side walls (31) (31).
Has a gate-shaped structure in which the trays (2) are connected to each other by a metal tray upper (32), the tray (2) is supported so that the tray (2) can relatively move back and forth, and the drive pin (33) and the guide pin ( 34) (34a) to the side wall (11) of the main body (1) respectively
The drive pin (3) is fitted into the L-shaped guide hole (15) opened in the above and the L-shaped guide groove (16) provided in the inner surface of the side wall.
3) is fitted into a guide hole formed in the drive arm (52) of the transfer mechanism and reciprocates. A cover opener (7) for opening the tape-protecting front lid of the cassette is provided between the side walls of the tray support (3).

As shown in FIGS. 1 and 2, the cover opener (7) has arm rods (75) projecting from both ends of the opener frame (71), and the base end of the arm rod is tray-supported by the pivot (73). While being pivotally supported on the side wall of the body, an outward guide pin (74) is projectingly provided on the side surface of the arm rod (75), and an arc-shaped opener guide hole (39) formed on the side wall of the tray support (3) To fit. One guide pin (74) penetrates the guide hole (39) of the side plate (31) and projects laterally, and moves along a guide (78) projectingly formed on the main body side wall (11). The front part of the guide (78) is horizontal and the rear part thereof is slightly raised, and the arm rod (75) is rotated upward when the cassette is transported. Behind the guide (78), a bracket (77) forms a mounting surface which is separated from the side wall (11) and has an auxiliary opener (76) having an arcuate guide surface at its upper end. When the tray support body (3) descends to the loading position, the guide (78) guides the guide pin (74) of the cover opener (7) and slightly raises the opener frame (71) until it is in a half-opened state. Then, when the tray support is guided by the guide holes (15) and (16) and descends, the opener frame (71) opened halfway.
Is placed on the auxiliary opener (76) to fully open the opener frame (71).

Although the above-mentioned construction is well known, the present invention provides a winding spring (96) on the side surface of the tray support (3) and cooperates with the tray (2) and the cover opener (7). It is characterized by that. The spring (96) is, as shown in FIGS. 3 and 4,
Hang one end (97) on the drive pin (33) and extend the other end (98)
Hangs over the guide hole (35) and extends across the opener guide hole (39). The extension (98) of the spring (96) is located below the tray pin (25) and above the guide pin (74) of the cover opener (7). Side wall of tray support (31)
Guide hole (35), the upper side of the hole bends one step (35b) on the loading progress side, and the upper side (35a) of the loading side
Is low. Also, the extension (98) of the spring (96)
The guide hole (35) is bent (99) so as to stand upright toward the side end of the opening of the guide hole (35).

On the inner surfaces of both side walls (31) of the tray support (3), tray rising restricting pieces (36) are provided at positions slightly higher than the upper side of the front part of the guide hole (35). Stoppers (8) are provided on the inner surface of both side walls (11) of the main body on the side of the opening, and the tray (2) and the tray support (3) are locked at the position of the opening when the cassette is on standby. is there.
The side wall (31) of the tray support (3) is provided with a downward cut (37) to form an abutment surface (37a) on the opening side of the cut, and a cam surface which inclines downward on the lower side of the side wall toward the opening direction. Forming (38). The tray (2) is formed by bending downwardly facing pieces (23) on both sides of the front of the cassette mounting surface (28) and making a cut (27) adjacent to the corresponding piece (23). The stopper (8) is a lock lever (82).
The base end of the lock lever is pivotally supported on the inner surface of the side wall (11) of the main body by the pivot shaft (81), and the cassette support is mounted on the upper surface of the lock lever (82).
The first locking surface (84) is formed so as to face the contact surface (37a) formed on the side wall of (3), and the tip of the lock lever (82) is provided with a contact piece (23) protruding from the front of the tray. ) Facing the second locking surface (85) and the notch (27) facing the detection piece (8)
3) are projected respectively. The side wall (11) of the main unit has a tray
A protruding piece (19) is provided so as to face the hitting piece (23) at the standby position of (2), and the forward movement of the tray (2) is locked.

Next, the operation of the loading device of the present invention having the above structure will be described. (Standby) Tray (2) and tray support as shown in FIG.
When (3) stops near the insertion slot and waits for cassette insertion, the contact piece (23) protruding from the front edge of the tray (2) hits the protruding piece (19) on the side wall of the main body and moves forward. Movement is restricted. The tray support (3) is restricted from moving forward because the rear end of the guide hole (35) hits the tray pin (25). The stopper (8) is urged to rotate in a clockwise direction by a spring (not shown) provided between the stopper (8) and the side wall of the main body, and stops at the position where the tip of the lock lever (82) hits the protrusion (19). The first locking surface (84) engages with the contact surface (37a) of the cassette support body (3) to restrict the rearward movement of the cassette support body (3). Also, the second locking surface
(85) engages with the contact piece (23) of the tray, and restricts the rearward movement of the tray. The detection piece (83) at the tip of the lock lever projects above the cassette mounting surface (28) through the notch (27) in the tray. The tray pin (25) is located at the rear end (35a) of the guide hole (35).
The tray pin (25) pushes down the spring extension portion (98) because the upper side of the guide hole is lowered by one step at this position. Along with this, the tip of the spring extension portion (98) urges the guide pin (74) of the cover opener downward, so that the opener frame
(71) is kept closed. Even when the VTR is vibrated or tilted, the tray (2) and the tray support are regulated by the stoppers (8) and the standby position is held. Further, since the opener frame (71) is pressed and biased by the spring (98), it cannot be rotated freely and is always pressed to the closed position.

Further, the tray pin (25) is pushed down by the stepped-down portion (35a) of the guide hole, and the tray (2) is separated from the restriction piece (36) projecting on the side plate of the tray support (3). When the cassette is inserted into the mounting surface, a clearance A is formed between the cassette and the regulating piece (36) as shown in FIG. 5, so that the cassette can be freely taken in and out.

(When inserting cassette) When the cassette (9) is inserted into the tray (2), the cassette (9) has two detection pieces (83) protruding from both sides of the mounting surface (28). Push it down to the position of the opener frame (71). At this time, stopper (8)
Is rotated slightly downward by pushing down the detection piece (83),
The first locking surface (84) disengages from the contact surface (37a) of the tray support member to allow the tray support member (3) to move freely. However, the second locking surface (85) is the contact piece (23) protruding from the tray.
The tray (2) is restricted from moving because it is still engaged with. Therefore, when the tray support (3) moves in the loading direction, the tray (2) moves forward relative to the tray support (3).

Since the stoppers (8) are arranged on both sides of the tray mounting surface, insertion of the cassette requires two detection pieces (83).
Detected by. If the cassette is inserted diagonally or sideways, only one detection piece hits the cassette, and the other detection piece projects above the cassette mounting surface, so the first locking surface and tray support Engagement with the body continues, preventing forcible insertion of the cassette.

(Loading of cassette) The cassette (9) is shown in FIG.
After hitting the opener frame (71) of the cover opener (7) as shown in (4), the tray support (3) moves rearward as shown in FIG. The cam surface (38) formed on the lower side of the tray support side plate guides and pushes down the lock lever (8), and the second locking surface (85)
Disengages the contact piece (23) and makes the tray (2) movable.

In FIG. 5, the tray (2) has a second locking surface (85).
When the cassette (9) pushes the opener frame (71) to move only the tray support (3) in the loading direction while the movement is restricted by the tray (2), the tray (2) is
Since it moves forward relative to (3), the tray pin (2
5) moves away from the stepped lower part (35a) of the guide hole (35) and moves to the position of FIG. 6 where the upper side of the guide hole (35) is raised further.

When the tray support (3) moves rearward and the opener frame (71) engages with the cassette contact (23) provided at the tray end, the tray support (3) carries the tray (2). Then it is transported to the loading position.

When the tray pin (25) is moved to the front end of the guide hole (35), the bent portion (99) of the spring extension portion (98) is moved to the tray pin (2).
5) Lightly lock, then tray (2) and tray support
(3) becomes one set.

Also, since the tray pin (25) moves to a higher position through the bent portion (35b) of the guide hole (35), the tray pin (25)
(25) is pushed up by the extension portion (98) of the spring, and the cassette (9) is pressed against the restricting piece (36) protruding from the side wall of the main body to clamp it.

(Conveyance of cassette) As shown in FIG.
When the tray (2) and the tray support (3) are conveyed as a set by engaging the spring bent portion (99) with the spring (25), the guide pin (74) of the cover opener guides the inner surface of the side wall. Guided upward by (78), the opener frame (71) rotates counterclockwise upward. At this time, the projecting piece (72) projecting from the end of the opener frame (71) locks the cover of the cassette, and simultaneously with the rotation of the cover opener, the cassette lid is opened and rotated. As the transfer to the tray support (3) progresses, the opener frame (71)
Since the opening rotation of the guide pin expands, the guide pin (74)
After passing through (8), the opener frame (71) is the auxiliary opener (7
Backed by 6).

(Loading completed) When the drive pin (33) of the tray support (3) descends the vertical portion of the guide hole (15) of the side wall (11) of the main body, the tray (2) and the tray support (3) are loaded. Descends along the guide hole (15), the cover opener (7) and the cassette lid are supported by the auxiliary opener (76) and remain above, so that the cassette lid of the cassette (9) can be opened wide. .

(Unloading) For unloading, the above steps are followed in reverse, and the tray (2) and the tray support (3) are
Are conveyed as a set along the guide hole (15) on the side wall of the main body. First, the cover opener (7) is disengaged from the auxiliary opener, the guide pin (74) descends downward to the guide (78), the opener frame (71) is returned to the closed position, and the engagement with the cassette lid is released.

As the tray support moves forward, the contact piece (23) of the tray (2) hits the projecting piece (19) and its forward movement is restricted, and the stopper (8) is brought into contact with the cam surface (38). The second locking surface (85) engages with the abutting piece (23) to keep the tray (2) from moving forward and backward while rotating clockwise upward.

As the tray support (3) continues to advance independently, the bent portion (99) of the spring passes through the tray pin (25) to engage the tray (2) with the tray support (3). Remove. As the tray support body (3) continues to move forward relative to the tray (2), the tray pin (25) is pulled down by the one-step lowering portion (35a) of the guide hole (35), and the tray (2 ) Is lowered.

Since the restriction piece (36) and the tray (9) are released from the clamp, the cassette (9) can be freely taken out. The tray support (3) advances further and the first stopper
The locking surface (84) engages the notch (37) to complete the unloading.

[0029]

According to the present invention, the cover opener (7) is always held in the standby position even when the magnetic recording apparatus is vibrated or in any tilted posture, so that the cover opener obstructs the insertion of the cassette. There is no need to do this, and the cassette can be inserted smoothly.

Since the above description and drawings are for the purpose of facilitating the understanding of the present invention, they should not be used to narrowly interpret the scope of the claims. It goes without saying that the present invention can be easily modified by those skilled in the art within the scope of the claims without departing from the technical idea.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the device of the present invention.

FIG. 2 is a plan view of the device of the present invention.

FIG. 3 is an exploded perspective view of a main part.

FIG. 4 is an explanatory diagram showing each step of loading.

FIG. 5 is an explanatory diagram showing each step of loading.

FIG. 6 is an explanatory diagram showing each step of loading.

FIG. 7 is an explanatory diagram showing each step of loading.

FIG. 8 is an explanatory diagram showing each step of loading.

[Explanation of symbols]

 (1) Main body (2) Tray (25) Tray pin (28) Cassette mounting surface (3) Tray support (33) Drive pin (36) Control piece (38) Cam surface (5) Drive gear (7) Cover opener (71) Opener frame (74) Guide pin (8) Stopper (83) Detection piece (84) First locking surface (85) Second locking surface (9) Cassette (96) Spring (98) Extension (99) ) Bent part

Claims (7)

[Claims] 1. A main body (1) having a reel stand (13) and a magnetic head drum (14) at a cassette loading position and an opening for inserting a cassette on the front surface, and a cassette mounting surface (28). (2) with a tray and the tray
Supporting (2) so that it can move relatively in the cassette insertion direction,
Tray support (3) with cover opener (7) inside
In the front loading device constituted by a transport mechanism for transporting the tray support (3) from the opening of the main body to the loading position, one end of the tray support (3) is placed at a proper position. A spring (96) is provided, which is stopped and enters the tray transfer path at the other end and extends above the cover opener (7). The spring (96) is provided in the tray support (3) when the tray (2) is provided. When moving relative to the loading direction, the tray (2)
A cassette loading device in a magnetic recording / reproducing apparatus, characterized in that the cover opener (7) is urged in a closing direction by engaging with the cover opening (7). 2. The side plate (31) of the tray support (3) is provided with a restricting piece (36) protruding upward from the tray mounting surface and a guide hole (35) of a predetermined length extending in the loading direction. On the side surface of the tray (2), a tray pin (25) that moves along the guide hole (35) is projected, and the extension (98) of the spring (96) is hooked on the tray pin (25) to attach the tray pin. 2. The pressing force is applied upward to press the cassette (9) on the tray mounting surface against the restriction piece (36).
Equipment. 3. The guide hole (35) of the tray support (3) is
The upper side of the loading side is steppedly bent (35b) and lowered, and when loading the cassette, the tray pin (25) is positioned at the stepped lower part (35a) of the guide hole (35),
The tray (2) is lowered by a step, the tray pin (25) is positioned at a higher position of the guide hole (35) during loading, and the tray (2) is raised by a spring (96). apparatus. 4. The spring (96) bends upward (99) at a position where the extension portion (98) hooks the tray pin (25),
Device according to claim 2, wherein the (2) and the tray support (3) are softly locked. 5. A stopper (8) is provided below the tray and the tray support at the cassette loading position so as to be able to approach and separate from the tray (2) and the tray support (3), and the stopper (8) is A first locking surface (84) that engages with the tray support (3), and a second locking surface (85) that engages with the tray (2) deeper than the engagement by the first locking surface. Device according to claim 1, characterized in that each is arranged on a common lever (82). 6. The tray support (3) is provided with a notch (37) having a downward opening at the lower edge of the side plate (31), and the first engaging surface of the stopper (8) is provided on the cassette insertion side of the notch. A contact surface (37a) facing the (84) is formed, and a cam surface (37b) extending downward from the contact surface (37a) in the cassette insertion direction is formed at the lower edge of the side plate to form a tray (2). Forms a contact piece (23) which is bent downward and faces the second stopper surface (85) of the stopper, and the engagement surface (37a) and the first stopper surface (84) are engaged during loading. 6. Device according to claim 5, characterized in that, after disengagement, the stopper (8) is lowered along the cam surface (37b) and subsequently the tray (2) is disengaged from the second locking surface (85). 7. The stopper (8) has a detection piece (83) projecting from below the cassette mounting surface (28) of the tray to the mounting surface.
Is installed, the detection piece (83) is pushed down by inserting the cassette onto the tray (2), and the stopper (8) is lowered, and the second locking surface (85) of the stopper (8) and the tray (2). The device according to claim 5, wherein the engagement between the first locking surface (84) and the tray support (3) is released, while the engagement between the first support surface (84) and the tray support (3) is released.