JPH0762934B2 - Tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The tape recorder of the present invention will be described in accordance with the following items.

A. Industrial fields of use B. Overview of the invention C. Prior art D. Problems to be solved by the invention E. Means for solving the problems F. Examples a. Overview [Figs. 1 to 3 [Fig.] B. Mechanical chassis [Figs. 1, 3 to 9] b-1. Support of mechanical chassis [Figs. 1, 3 to 9]
[Fig.] B-2. Recording / reproducing unit [Fig. 1, Fig. 4 to Fig. 7, Fig. 9]
Fig.] C. Cassette attachment / detachment mechanism [Figs. 1, 3 to 10] c-1. Rotating arm [Figs. 1, 3 to 10] c-2. Cassette holding unit [First] FIGS. 3 to 9] d. Guide means [FIGS. 4 to 10] d-1. Guided roller [FIGS. 4 to 10] d-2. Guide member [FIGS. 4 to 10] 8 and 10] d-3. Operation e. Drive unit [Figs. 4 to 10] e-1. Motor [Figs. 4 to 10] e-2. First gear [Fig. 4 to 10] e-3. Second gear [Figs. 4 to 9] f. Operation f-1. Movement of mechanical chassis from retracted position to retracted position f-2. Rotation arm Rotate upward, eject cassette holder f-3. Rotate arm downwards f-4. Move mechanical chassis from pull-out position to pull-in position g. Recording or playback G. Effects of invention ( A. Field of Industrial Application) The present invention is a novel tape recorder. About over. For more information,
The mechanical chassis provided with the recording / reproducing unit and the cassette holding member is slidably supported with respect to the outer casing, and at least the tape cassette is attached to and removed from the cassette holding member with the mechanical chassis pulled out from the outer casing. The present invention relates to a so-called linear skating tape recorder, and more particularly to a tape recorder that requires the cassette holding member to be rotated to the side opposite to the mechanical chassis when the mechanical chassis reaches a predetermined drawing position. Despite the simple structure, sliding of the mechanical chassis and rotation of the cassette holding member can be performed by one motor, and the drive system for performing the above-mentioned sliding and rotating can be driven for sliding. It is possible to slide the mechanical chassis and rotate the cassette holding member without separately providing the drive system for rotation and the drive system for rotation. Preparative is intended to provide a novel tape recorder to be able to occupy performed in accordance with a predetermined timing.

(B. SUMMARY OF THE INVENTION) The present invention supports a mechanical chassis provided with a recording / reproducing unit, a cassette holding member, etc. slidably with respect to an outer casing, and mounts and takes out a tape cassette from the cassette holding member. Is a tape recorder designed to pull out the mechanical chassis from the outer casing and rotate the cassette holding member to the side opposite to the mechanical chassis, so that the mechanical chassis can be slid and the cassette holding member can be rotated. One motor and a first gear rotated by the motor are supported by a rotating arm supported by a cassette holding member, and the motor is rotated by the first gear and a sliding force is applied to the mechanical chassis. When the mechanical chassis is prevented from sliding, the second gear supports the second gear that biases the The rotation arm is caused to rotate by moving along the axis, whereby sliding of the mechanical chassis and rotation of the cassette holding member are performed by a single motor and without providing a plurality of drive systems. It is something that can be done.

(C. Prior Art) For example, in a video tape recorder (hereinafter, referred to as "VTR") that uses a cassette type magnetic tape, a cassette for mounting a tape cassette at a predetermined cassette mounting position of a recording / reproducing unit is generally used. A loading mechanism is provided.

The conventional cassette loading mechanism can be divided into the following two types in terms of the loading method. That is, one is a so-called top loading type cassette loading mechanism, and the other is a so-called front loading type cassette loading mechanism.

Of these two types of cassette loading mechanism,
First, in the former case, a cassette holding member for holding a tape cassette and mounting it at a predetermined cassette mounting position in a recording / reproducing unit is supported movably in a substantially vertical direction with respect to an outer casing, and a tape for the cassette holding member is attached. Since the cassette holding member is mounted and taken out while the cassette holding member is projected upward from the outer casing, it is not necessary to include the movement stroke of the cassette holding member in the height of the outer casing. There is an advantage that the casing can be configured to be relatively thin. On the other hand, on the other hand, VTRs and related equipment, such as not being able to place video equipment on the outer casing, and having a fairly high space above the outer casing when it is put in a rack, etc. However, it has a drawback in that the location of is extremely limited.

In the latter, that is, the front loading type cassette loading mechanism, the cassette holding member is moved so as to draw a substantially horizontal L-shaped movement trajectory in the outer casing, and the tape cassette is mounted on the cassette holding member. Moreover, since the taking-out and the taking-out are performed from the front side of the outer casing, there is an advantage that the space above the outer casing can be effectively used and the place of placing the space is not limited. However, on the other hand, since the movement stroke of the cassette holding member in the vertical direction needs to be included in the height of the outer casing, the shape of the outer casing becomes large.
It has a drawback that a complicated mechanism for moving the cassette holding member along the laterally L-shaped locus is required.

Therefore, in order to take advantage of the advantages of these two types of cassette loading mechanisms and to eliminate these disadvantages, a mechanical chassis provided with a recording / reproducing unit, a cassette holding member, etc. can be slidably attached to an outer casing. It is conceivable that the tape cassette is mounted and removed from the cassette holding member while the mechanical chassis is pulled out from the outer casing and the cassette holding member is moved to the non-mechanical chassis side.

Regarding the VTR of such linear skating type, Japanese Patent Application No. 59-
There is one proposed in No. 206070 (Japanese Patent Publication No. 4-70707).

(D. Problems to be Solved by the Invention) However, if the VTR is a linear skating type, a new problem arises such as the VTR mechanism becoming very complicated.

That is, if the VTR is a linear skating type, first, a mechanism for slidably supporting the mechanical chassis with respect to the outer casing is required, and also a drive mechanism for sliding the mechanical chassis is required. .

Therefore, in order to prevent the mechanism from becoming complicated even when the VTR of the linear skating type is used in the above-mentioned Japanese Patent Application No. 59-206070, the applicant moved the sliding of the mechanical chassis and the rotation of the cassette holding member. It has been proposed that the motion is performed by one motor.

That is, one drive mechanism for sliding the mechanical chassis and the other drive mechanism for rotating the cassette holding member and one motor are connected via a so-called planetary gear mechanism, and the mechanical chassis slides. During this period, the rotation of the motor is transmitted only to the one drive mechanism, and when the mechanical chassis cannot slide, the rotation of the motor is transmitted only to the other drive mechanism.

However, according to such means, although a single motor can be provided, a drive mechanism for sliding the mechanical chassis, a drive mechanism for rotating the cassette holding member, and two drive mechanisms are still provided. Moreover, since the planetary gear mechanism composed of a large number of gear members is used, the number of parts is considerably large and the number of assembling steps is also large. Further, the planetary gear mechanism has a problem that when it is operated, a specific noise is generated.

(E. Means for Solving Problems) In order to solve the above problems, the tape recorder of the present invention supports a mechanical chassis provided with a recording / reproducing unit slidably with respect to an outer casing. A tape recorder in which a mechanical chassis is pulled out from an outer casing for loading / unloading a tape cassette to / from the recording / reproducing section, and the mechanical chassis is supported so as to be rotatable in a substantially vertical direction and has a rotating end. Side is provided with a cassette holding portion for holding a tape cassette, a horizontal guide portion fixed to the outer casing side and extending in a substantially horizontal direction, and a vertical guide portion continuously extending in a substantially vertical direction from its front end portion. And a rack portion that extends along the extending direction of the horizontal guide portion and is fixed to the outer casing side, and is supported by the rotating arm and slides on the guide means. A guided pin engaged therewith, a motor supported by the rotating arm, a first gear supported by the rotating arm and rotated by the motor, and a rotation center of the rotating arm. The rack portion and the first portion are arranged substantially coaxially.
And a second gear that meshes with the gear.

Therefore, according to the present invention, the sliding of the mechanical chassis and the rotation of the cassette holding member can be performed by one motor, and the drive mechanism for performing the sliding and the rotation is particularly driven for sliding. System and a rotation drive system are separately provided, or rotation of the motor is a so-called planetary gear mechanism (a planetary gear is provided separately from the first output gear and the second output gear, and the first output gear is provided by the planetary gear. And a second output gear are selectively rotated, the sliding of the mechanical chassis and the rotation of the cassette holding member are performed at a predetermined timing without switching using a transmission path switching mechanism such as a mechanism. It can be done.

(F. Examples) The details of the tape recorder of the present invention will be described below with reference to the examples shown in the accompanying drawings.

(A. Overview) [FIGS. 1 to 3] In the drawings, 1 is a VTR and 2 is its outer casing.
The outer casing 2 is formed in a substantially thin box shape, and the left side of the front panel 3 thereof (the direction diagonally upward to the left in FIG. 1 is the left side, and the direction diagonally downward to the right is the right side. The direction directed obliquely downward is defined as the front side, and the direction directed obliquely upward to the right is defined as the rear side. In the following description, the direction is referred to as this direction.) Mechanical chassis 4 provided
A chassis outlet 5 is formed for pulling out from the outer casing 2.

Reference numeral 6 denotes a movable panel fixed to the front end of the mechanical chassis 4. The movable panel 6 has a size substantially equal to that of the chassis outlet 5, and the mechanical chassis 4 is shown in FIGS. 4 and 6. As described above, when the chassis outlet 5 is moved to the position retracted inside the outer casing 2 (hereinafter, this position is referred to as “retracted position”), the chassis outlet 5 is moved to the position shown in FIG. 2 and FIG. It is designed to be closed by the movable panel 6.

Although illustration is omitted, inside the outer casing 2, a system controller including a storage device and a control device in which each control program and the like are stored, and other devices necessary for controlling the operation of the VTR 1. Is provided. Further, a large number of operation buttons 7,
An operating unit 8 in which 7, ... Are arranged is provided.

(B. Mechanical chassis) [FIG. 1, FIG. 3 to FIG. 9] (b-1. Support of mechanical chassis) [FIG. 1, FIG. 3 to FIG. 9] The mechanical chassis 4 is a substantially square plate. The guide rails, which are formed in the shape of a circle, are supported by guide rollers supported on the outer casing 2 side so as to be slidable in the front-rear direction with respect to the outer casing 2. Has been done.

That is, 9 and 9 ′ are guide rails fixed along both left and right end surfaces of the lower surface of the mechanical chassis 4, and the guide rails 9 and 9 ′ have a substantially angle C when viewed from the front-rear direction.
It is formed in a channel shape, and the C-shaped openings thereof are arranged so as to face each other outward.

Reference numerals 10 and 10 denote guide rollers (specifically, the outer casing) rotatably supported by two at a position close to the right opening edge of the chassis outlet 5 inside the outer casing 2 so as to be spaced apart in the front-rear direction. Two
It is supported by a metal frame located inside. Although not shown, a guide roller similar to this is also provided at a position close to the opening edge on the left side of the chassis outlet 5.

Then, the opening edge of the C-shaped opening of the right guide rail 9 provided on the mechanical chassis 4 is the right guide roller.
Also, the C-shaped opening edge of the left guide rail 9'is supported by the left guide roller (not shown), so that the mechanical chassis 4 with respect to the outer casing 2 is supported. It is supported so as to be slidable in the front-rear direction, and is pulled out of the outer casing 2 while being guided in the sliding direction by the right guide rollers 10 and 10 and a left guide roller (not shown). From the position to the outer casing 2
It is designed to be able to be drawn in.

(B-2. Recording / reproducing unit) [FIG. 1, FIG. 4 to FIG. 7, FIG. 9] 11 is a recording / reproducing unit provided in the mechanical chassis 4, and the recording / reproducing unit 11 will be described later. The tape cassette is provided with the members or mechanisms necessary for recording / reproducing on / from the magnetic tape of the tape cassette.

That is, 12 and 12 'are reel stands arranged at a portion close to the front edge of the mechanical chassis 4 in the left-right direction with a predetermined distance therebetween, and these reel stands 12, 12' rotate on a support shaft (not shown). The support shafts are freely supported, and engaging shaft portions 13 and 13 'are provided at the upper end portions thereof.

Numerals 14, 14 and 14 ', 14' are positioning pins arranged near the left and right edges of the front part of the mechanical chassis 4, and of these, the positioning pins 14 ', 14' on the rear side Substantially conical insertion parts 14'a, 14'a are provided so as to project from the end surface. The positioning pins 14, 14 and 14 ', 14' are used for positioning the tape cassette mounted in the recording / reproducing section 11.

Reference numeral 15 denotes a head drum arranged near the rear edge of the mechanical chassis 4, and an upper rotary drum 15a is provided with a video head (not shown).

Although most of the mechanism necessary for recording and reproducing is omitted in the drawing, in actuality, in addition to the above-mentioned members, an audio head and a control head are provided on the upper surface of the mechanical chassis 4. And a large number of tape guide posts for restricting the travel path of the head member such as the full-width erasing head and the magnetic tape, and for drawing the magnetic tape from the tape cassette and winding it around the head drum 15 and various head members and tape guide posts. Is equipped with a tape loading mechanism, a capstan and a pinch roller for running the magnetic tape at a predetermined speed,
Further, on the lower surface of the mechanical chassis 4, the rotary drum 15a of the head drum, the capstan, the reel stand 12, 12 '.
A motor, a transmission mechanism, a servo mechanism, and the like for rotating the above are provided.

The recording / reproducing unit 11 itself of the VTR 1 is slidably supported with respect to the outer casing 2, and the mechanical chassis 4 is pulled out to the outer casing 2, whereby the VTR 1 shown in FIGS. As shown in FIGS. 7, 7 and 8, the recording / reproducing unit 11 is drawn out of the outer housing 2.

(C. Cassette attachment / detachment mechanism) [Figs. 1, 3 to 10] 16 is a cassette attachment / detachment mechanism. This cassette attaching / detaching mechanism 16
Is a mechanism for mounting a tape cassette, which will be described later, at the cassette mounting position of the recording / reproducing unit 11 and for detaching it from the cassette mounting position.

(C-1. Rotating arm) [Figs. 1, 3 to 10] 17 and 17 'are rotating arms, and the rotating arms 17 and 17' are the main rotating arm and the sub-rotating arm. It consists of an arm.

That is, reference numerals 18 and 18 'denote main pivot arms arranged at positions near the rear end edges of the parts along the left and right edges of the mechanical chassis 4, and the side surfaces thereof are arranged so as to face each other in parallel.

The main turning arms 18 and 18 'are bent in a substantially crank shape when viewed from above at the portions near the front ends thereof. 19, 19 '
Is a spring hook projecting forward from the lower end of the front end edge of the main pivot arm 18, 18 '.

In addition, the portion of the right main rotating arm 18 that is closer to the rear side from the central portion in the front-rear direction is formed wider than the other portions, and the hole 20 is formed in the substantially central portion of the widened portion. The screw insertion holes 2 are formed at the front and rear sides of the hole 20.
1, 21 are formed.

Reference numerals 22 and 22 'denote support pieces which are erected from the rear end portions of the left and right edges of the mechanical chassis 4, and both end portions of a connecting shaft 23 are rotatably supported on the upper end portions of the support pieces 22 and 22'. ing.

The rear ends of the left and right main turning arms 18 and 18 'are fixed to both ends of the connecting shaft 23, so that the main turning arms 18 and 18' move vertically in the mechanical chassis 4. Is supported so that it can rotate freely, and the connecting shaft
By 23, they are connected to each other so as to be rotated integrally.

Reference numerals 24 and 24 'are sub-rotating arms, and these sub-rotating arms 2
The reference numerals 4 and 24 'are provided so as to rotate substantially integrally with the above-described main turning arms 18 and 18', respectively, and the right sub-turning arm 24 and the left sub-turning arm 24 'are provided. And are formed substantially symmetrically. Sub rotation arm 2
The reference numerals 4 and 24 'are formed in a plate shape elongated in the front-rear direction, and are bent in the crank at a substantially intermediate portion between the central portion and the front end in the longitudinal direction. To the position, that is, about the main rotation arm 18 and
The spring engaging holes 25, 25 'are projected to the right at the upper edge of the portion of the 18' corresponding to the spring hook pieces 19, 19 '.
Is formed with the projection pieces 26, 26 '.
The rear ends of the reference numerals 6 and 26 'extend to portions substantially corresponding to the crank-shaped bent portions of the main pivot arms 18 and 18'.

Then, the insertion holes 27, and
27 'is formed.

Of the right sub-rotating arm 24, the right main turning arm 18
A notched portion 24a, which is notched in a substantially arc shape, is formed at the lower end edge of the portion corresponding to the hole 20 formed in.

Then, the right sub-rotating arm 24 is inserted into the insertion hole 27 by inserting the left side portion of the right end portion of the connecting shaft 23 to which the main turning arm 18 is fixed, The left sub-rotating arm 24 'is rotatably supported by the connecting shaft 23 by inserting the left end of the connecting shaft 23 into the insertion hole 27'.

Then, the tension spring 28 is inserted into the spring engaging holes 25, 25 'formed in the spring hooking pieces 19, 19' of the main turning arms 18, 18 'and the projecting pieces 26, 26' of the auxiliary turning arms 24, 24 '. , 28 'are hooked at both ends thereof, whereby the sub-rotating arms 24 and 24' and the main rotating arms 18 and 18 'are attracted to each other by the pulling force of the tension springs 28 and 28'. And the protruding pieces of the sub-rotating arms 24 and 24 '.
The rear end portions of 26 and 26 'are brought into contact with the upper edges of the main rotating arms 18 and 18', so that the positional relationship between the main and auxiliary rotating arms is maintained in a predetermined state. ing.

(C-2. Cassette holding portion) [Figs. 1, 3 to 9
FIG. 29 shows a cassette holder supported on the front ends of the sub-rotating arms 24 and 24 '. The cassette holding portion 29 is composed of a bottom plate 30 and side plates 31 and 31 provided upright from both left and right edges of the bottom plate 30, and the side plates 31 and 31 are fixed to the front end portions of the sub-rotating arms 24 and 24 '. Then, on the bottom plate 30, the reel stand 12, 1
Substantially circular openings 32, 32 'are formed in the portion corresponding to 2'. Reference numerals 33 and 33 'denote cassette holding pieces provided so as to project inward from each other from substantially central portions of the upper edges of the side plates 31 and 31 in the front-rear direction, and the front portions thereof are tape cassettes to the cassette holding portion 29. It is bent diagonally upward to allow easy insertion.

34 and 34 are locking pieces projecting from positions on both sides of the rear edge of the bottom plate 30, and the tape cassette inserted into the cassette holding portion 29 is brought into contact with the locking pieces 34 and 34,
The cassette holder 29 is held at a predetermined position.

(D. Guide means) [Figs. 4 to 10] (d-1. Guided roller) [Figs. 4 to 10] 35 is a main turning arm 18 constituting the right turning arm 17.
It is a guided roller supported by.

The guided roller 35 controls the operation timing between the sliding of the mechanical chassis 4 and the rotation of the rotating arms 17, 17 'by being guided in the moving direction by a guide member described later. . The guided roller 35 is rotatably supported by a pin 36 that projects substantially horizontally from the portion near the upper edge of the front end of the main rotating arm 18 toward the right side.

(D-2. Guide member) [FIGS. 4 to 8 and 10] 37 is a guide member, and the guide member 37 is supported by a frame (not shown) provided in the outer casing 2. The mechanical chassis 4 is arranged above the position closer to the right side of the right edge of the mechanical chassis 4 so as to extend in the front-rear direction as a whole, and is formed so as to form an elongated groove by a synthetic resin having relatively good sloping property. There is.

The guide member 37 has a horizontal guide portion 37a that extends substantially horizontally from its rear end to a position close to the front panel 3 of the outer casing 2.
And a vertical guide portion 37b extending continuously upward from the front end of the horizontal guide portion 37a, and a continuous portion 37c between the horizontal guide portion 37a and the vertical guide portion 37b is formed in a substantially arc shape. There is.

Reference numeral 38 denotes a rack integrally formed with the guide member 37. The rack 38 is located on the left side of the guide member 37, and its rear end extends rearward from the rear end of the guide member 37. The teeth are formed on the upper surface.

The guided roller 35 supported by the right main rotation arm 18 is slidably engaged with a guide member 37.

(D-3. Action) Therefore, the guided roller 35 is connected to the horizontal guide portion 37 of the guide member 37.
While engaged with a, the rotation of the rotation arms 17 and 17 'is prevented, and the cassette holding portion 29 is placed in a predetermined position of the recording / reproducing portion 11 and cannot be further lowered. The pivoting arms 18, 18 'are made to lie downward, so that the tension springs 28, 28' stretched between the main pivoting arms 18, 18 'and the sub-rotating arms 24, 24'. The main rotating arms 18 and 18 ', and the upper edges of the main rotating arms 18 and 18' are sub-rotating arms 24,
The projections 26, 26 'of the 24' are separated from each other downward, and the pulling force of the tension springs 28, 28 'acts on the cassette holding portion 29 via the sub-rotating arms 24, 24' so that the cassette holding portion 29, that is, Then, the tape cassette held therein is crimped to the reel stands 12, 12 ', etc. with a predetermined crimping force.

The mechanical chassis 4 prevents the guided roller 35 from moving further rearward by contacting the rear end edge of the horizontal guide portion 37a, and the guided roller 35 engages with the vertical guide portion 37b. By doing so, it is prevented from moving further forward.

Further, the rotating arms 17 and 17 'can rotate in a state where the guided roller 35 is engaged with the vertical guide portion 37b, and the guided roller 35 abuts on the upper edge of the vertical guide portion 37b. It will be prevented from being rotated further upward.

It should be noted that while the guided roller 35 is engaged with the continuous portion 37c, the operation amount of one of sliding of the mechanical chassis 4 and rotation of the rotating arms 17 and 17 'is gradually increased, and the other is gradually increased. The operation amounts are gradually reduced while they are performed together.

(E. Driving part) [Figs. 4 to 10] (e-1. Motor) [Figs. 4 to 10] 39 is sliding of the mechanical chassis 4 and rotation of the rotating arms 17 and 17 '. It is a motor that is a drive source for performing.

The motor 39 is capable of switching the rotation direction, and an output gear 41 is fixed to the tip of a rotary shaft 40 thereof. The motor 39 is mounted on the left side of the main rotating arm 18 with the output gear 41 thereof being positioned on the right side of the main rotating arm 18 through the hole 20 formed in the right side main rotating arm 18. It is worn. That is, 42, 42 are motors 39
Screws for attaching the motor 39
42, 42 are the screw insertion holes 2 formed in the main rotation arm 18.
It is attached to the main rotation arm 18 by being screwed into the case of the motor 39 through 1, 21.

(E-2. First gear) [Figs. 4 to 10] 43 is a first gear supported by the right main turning arm 18. The first gear 43 is a gear for rotating a second gear, which will be described later, and also for rotating the rotating arms 17, 17 ', and includes a reduction gear 44 and a drive gear 45 having a smaller diameter than the reduction gear 44. Are integrally formed.

Reference numeral 46 denotes a pin that is provided so as to project from the upper end edge of the central portion of the main rotating arm 18 toward the left side, and the first gear 43 is the pin 46.
The reduction gear 44 is rotatably supported by the output gear 41.

(E-3. Second gear) [Figs. 4 to 9] 47 is a second gear that is rotated by the first gear 43 and slides the mechanical chassis 4, and is used for deceleration. A gear 48 and a slide gear 49 having a smaller diameter than the reduction gear 48 are integrally formed.

And, the second gear 47 is the right end portion of the connecting shaft 23, that is,
The reduction gear 48 is rotatably supported by a portion projecting from the right side support piece 22 to the right side, and the reduction gear 48 is the first gear 43.
Of the drive gear 45, and its slide gear 49 is in mesh with the rack 38 provided on the guide member 37.

(F. Operation) (f-1. Movement of mechanical chassis from retracted position to retracted position) Then, sliding of mechanical chassis 4 and rotating arms 17, 17 '
The rotation of is performed by one motor 39, and its operation will be described below.

That is, the guided roller 35 is the horizontal guide portion 37a of the guide member 37.
Since the vertical rotation of the right main rotation arm 18 is blocked during the engagement with the
The position of the gear 43 with respect to the second gear 47 is fixedly held.

Therefore, when the motor 39 is rotated in this state, the rotation is transmitted to the slide gear 49 via the output gear 41-the reduction gear 44 of the first gear 43-the drive gear 45-the reduction gear 48 of the second gear 47. Since it is transmitted, the slide gear 49 is rotated, which causes the slide gear 49 to move in the front-rear direction along the rack 38, so that the mechanical chassis 4 is slid. .

Therefore, in the mechanical chassis 4, the guided roller 35 thereof comes into contact with the rear end of the horizontal guide portion 37a of the guide member 37, that is,
When the motor 39 is normally rotated from the retracted position shown in FIGS. 4 and 6, the slide gear 49 is rotated counterclockwise in FIGS. As a result, the mechanical chassis 4 is moved forward.

Then, when the guided roller 35 is engaged with the continuous portion 37c of the guide member 37, the guided roller 35 is guided mainly upward, so that the forward movement amount of the mechanical chassis 4 is gradually reduced. When the guided roller 35 is engaged with the vertical guide portion 37b, the movement of the guided roller 35 in the front-rear direction is completely blocked, and the forward movement of the mechanical chassis 4 is also completely blocked. Will be.

In this state, the mechanical chassis 4 is shown in FIG.
As shown in FIG. 5 and as indicated by a two-dot chain line in FIG.
A part of the recording / reproducing unit 11 which is more than the front half is located at a position where it is pulled out to the outer casing 2 (hereinafter, referred to as a “pull-out position”).

(F-2. Rotation of rotation arm upward, ejection of cassette holding portion) Meanwhile, the guided roller 35 is a continuous portion 37c of the guide member 37.
When it is engaged with, the amount of forward movement of the mechanical chassis 4 is gradually reduced as described above, so that the rotation of the slide gear 49 is relatively restrained by the rack 38. Therefore, the rotation speed of the gear 47 is reduced.

Therefore, the first gear 43 that meshes with the second gear 47 is itself the second gear because the rotation speed of the second gear 47 is reduced.
The rotational force that tends to move relative to the gear 47 is urged. In this state, that is, in the state in which the guided roller 35 is engaged with the continuous portion 37c of the guide member 37, the rotating arm 17 can move to the information. The second gear 47 is rotated like a planet. That is, the first gear 43 is rotated so that the drive gear 45 thereof is moved along the outer peripheral surface of the reduction gear 48 of the second gear 47.

As a result, the pin 46 supporting the first gear 43 is pressed substantially upward, so that the rotating arm 17 is rotated upward.

Further, the guided roller 35 is connected to the vertical guide portion 37b of the guide member 37.
, The rotation of the slide gear 49, that is, the rotation of the second gear 47 is completely blocked, and therefore the rotational force of the motor 39 is the first. It is used only as a turning force for turning the gear 43 of the second gear 47 with respect to the second gear 47, in other words, as a driving force for turning the turning arm 17.

Then, when the rotating arms 17 and 17 'are rotated upward and the guided roller 35 comes into contact with the upper end edge of the vertical guide portion 37b,
The cassette holder 29, as shown in FIGS. 1 and 5,
A position where the front end edge of the bottom plate 30 is slightly higher than the upper end edge of the movable panel 6 (hereinafter, referred to as “eject position”).
Will be moved to.

Reference numeral 50 designates a tape cassette (see FIGS. 3, 4, 5, and 7). When the tape cassette 50 is loaded into or unloaded from the cassette holding portion 29, the cassette holding portion 29 is at the eject position. It is performed in the state where it has come.

(F-3. Rotation of rotation arm downward) When the motor 39 is rotated in the reverse direction from the state where the cassette holding portion 29 is in the eject position, the guided roller 35 is moved even if the mechanical chassis 4 tries to move to the retracted position. Since the rearward movement is blocked by the vertical guide portion 37b of the guide member 37, the mechanical chassis 4 cannot move rearward, which prevents the second gear 47 from rotating. Become. Therefore, the rotational force of the motor 39 acts so as to rotate the first gear 43 while rotating the first gear 43 with respect to the second gear 47, that is, to move the motor 39 substantially downward.

Then, since the pin 46 supporting the first gear 43 is pressed substantially downward, the right main rotation arm 18 is rotated toward the lower side, whereby the rotation arms 17, 17 '. Will be rotated downward.

Then, when the guided roller 35 is engaged with the continuous portion 37c of the guide member 37, the guided roller 35 is restrained from moving downward and can move backward as well. The second gear 47 is ready for rotation.
Therefore, the downward movement of the first gear 43 is suppressed, while the second gear 47 is rotated in the clockwise direction so that the mechanical chassis 4 is slightly retracted, and the guided gear is guided. When the roller 35 is engaged with the horizontal guide portion 37a of the guide member 37, the downward movement of the guided roller 35 is completely blocked, whereby the downward rotation of the rotating arms 17, 17 'is completed. Will be done.

Then, when the downward rotation of the rotating arms 17 and 17 'is completed, the bottom plate 30 of the cassette holding unit 29 has the mechanical chassis 4
It will come to a position that is substantially horizontally opposed to.

When the tape cassette 50 is mounted on the cassette holding portion 29, the tape cassette 50 is moved to the positioning pins 14, 14 and 14 just before the downward rotation of the main rotation arms 18, 18 'is completed. ′, 14 ′, and the insertion portions 14 ′ a, 14 ′ a of the positioning pins 14 ′, 14 ′ on the rear side are placed in positioning holes (not shown) formed on the bottom surface of the cassette case.
Is inserted, whereby the tape cassette 50 is mounted at a predetermined mounting position in the recording / reproducing unit 11, and by this, the cassette holding unit 29 and the sub-rotating arms 24, 24 '.
Is prevented from moving downward, and the main rotation arms 18 and 18 'are moved slightly downward from the above-mentioned state to prevent the rotation thereof.

Thereby, as described above, the tension spring 28,
28 'is slightly stretched, and the tape cassette 50 is moved to the positioning pins 14, 14 and 14', 14 'by the cassette holding portion 29 which is pulled downward by the pulling force of the tension springs 28, 28'.
Will be crimped to.

(F-4. Movement of mechanical chassis from drawn-out position to drawn-in position) When the guided roller 35 is engaged with the horizontal guide portion 37a of the guide member 37, rotation of the rotating arms 17, 17 'is blocked, And,
The guided roller 35 is in a state of being able to move completely backward. Therefore, the second gear 47 in this state is rotated without being restrained from rotating, and the mechanical chassis 4 is moved rearward.

(G. Recording or Reproduction) For recording or reproduction with respect to the magnetic tape housed in the tape cassette 50, the magnetic tape is pulled out from the state in which the tape cassette 50 is mounted in the recording / reproducing unit 11, and a part of the magnetic tape is recorded on the head drum 15 The magnetic tape is run with a predetermined wrap angle around it, and is wound around a tape guide post or various head members (not shown) provided in the recording / reproducing unit 11, and the rotating drum 15a of the head drum 15 is rotated.
It is to be noted that such recording or reproduction can be carried out while the mechanical chassis 4 is in the retracted position,
If necessary, as shown in FIG. 3 and FIG. 7, a position depending on a state where most of the tape cassette 50 in which the mechanical chassis 4 is mounted is ejected from the outer casing 2 (hereinafter, referred to as “half pull-out position”). It can be performed even when it is moved to. As described above, when recording or reproducing is performed with the mechanical chassis 4 moved to the half-pulled-out position, recording or reproducing can be performed while visually confirming the remaining amount of the tape.

(G. Effect of the Invention) As is apparent from the above description, the tape recorder of the present invention supports the mechanical chassis provided with the recording / reproducing unit slidably with respect to the outer casing and enables the above-mentioned recording / reproducing. A tape recorder is constructed such that a mechanical chassis is pulled out from an outer casing for loading and unloading a tape cassette to and from a mechanical cassette. A guide including a rotating arm provided with a cassette holding portion for holding the horizontal guide portion, a horizontal guide portion fixed to the outer casing side and extending in a substantially horizontal direction, and a vertical guide portion continuously extending in a substantially vertical direction from a front end portion thereof. Means, a rack portion extending in the extending direction of the horizontal guide portion and fixed to the outer casing side, and a rack portion supported by the rotating arm and slidably engaged with the guide means. The guided pin, the motor supported by the rotation arm, the first gear supported by the rotation arm and rotated by the motor, and substantially coaxial with the rotation center of the rotation arm. It is provided with the rack portion and a second gear that meshes with the first gear, and when the guided pin is engaged with the horizontal guide portion of the guide means, the engagement state thereof. Prevents the rotation arm from moving in the vertical direction and slides the mechanical chassis so that the second gear is moved along the rack portion, and the guided pin causes the vertical guide portion of the guide means. When the first gear is engaged with the second gear, the horizontal movement of the rotary arm is prevented by the engagement state, thereby preventing the second gear from rotating and the first gear to move to the second gear. Move along the outer surface Characterized in that so as to allowed to move the rotating arm in the vertical direction so as to be.

Therefore, according to the present invention, the sliding of the mechanical chassis and the rotation of the cassette holding member can be performed by one motor, and the drive mechanism for performing the sliding and the rotation is particularly driven for sliding. Or a rotational drive system, or the rotational force of the motor is a so-called planetary gear mechanism (a planetary gear is provided separately from the first output gear and the second output gear, and the first gear is provided by the planetary gear). The sliding of the mechanical chassis and the rotation of the cassette holding member are predetermined without switching using a transmission path switching mechanism such as a mechanism for selectively rotating the output gear and the second output gear. It can be done according to the timing.

Therefore, according to the present invention, the mechanism for sliding the mechanical chassis and rotating the cassette holding member necessary for this type of tape recorder can be configured by an extremely small number of members. That is, since the sliding portion can be made smaller and lighter in weight, the power consumption for driving the sliding portion can be reduced and the number of assembling steps can be reduced. .

[Brief description of drawings]

The drawings show an example in which the tape recorder of the present invention is applied to a video tape recorder. FIGS. 1 to 3 each show the entire video tape recorder, and FIG. 2 is a perspective view of the recording / reproducing unit in the retracted position, FIG. 3 is a perspective view of the recording / reproducing unit in the half-pulled-out position, and FIG. FIG. 5 is a partially cutaway plan view showing a part of the outer casing, and FIGS. 5 to 7 show the essential parts by cutting the outer casing, respectively, and FIG. 5 shows the recording / reproducing unit in the pull-out position. FIG. 6 is a side view showing the state, FIG. 6 is a side view showing the state where the recording / reproducing unit is in the retracted position, FIG. FIG. 9 is a side view showing a main part of the mechanical chassis shown in FIG. Is a perspective view showing the guiding means and a part of the rotating arm. Explanation of symbols 1 ... tape recorder, 2 ... outer casing, 4 ... mechanical chassis, 11 ... recording / reproducing section, 17, 17 '... rotating arm, 35 ... guided pin, 37 ... guide means , 37a …… horizontal guide part, 37b …… vertical guide part, 38 …… rack part, 39 …… motor, 43 …… first gear, 47 …… second gear, 50 …… tape cassette

Claims (1)

[Claims] 1. A mechanical chassis provided with a recording / reproducing unit is slidably supported with respect to an outer casing, and a tape cassette is inserted into and removed from the recording / reproducing unit by pulling out the mechanical chassis from the outer casing. In the tape recorder, the rotation arm is supported by the mechanical chassis so as to be rotatable in a substantially vertical direction, and the rotation arm is provided with a cassette holding portion for holding the tape cassette, and the outer casing side is provided with the rotation arm. Guide means comprising a horizontal guide portion that is fixed and extends substantially in the horizontal direction, and a vertical guide portion that continuously extends from the front end portion thereof in the substantially vertical direction; and a guide means that extends along the extending direction of the horizontal guide portion and is located on the outer casing side. A fixed rack portion; a guided pin supported by the rotating arm and slidably engaged with the guide means; a motor supported by the rotating arm; A first gear supported by an arm and rotated by the motor; and a second gear arranged substantially coaxially with a rotation center of the rotation arm and meshing with the rack portion and the first gear. When the guided pin is engaged with the horizontal guide portion of the guide means, the engagement state prevents movement of the rotating arm in the vertical direction and the second gear is The mechanical chassis is slid so as to be moved along the rack portion, and when the guided pin is engaged with the vertical guide portion of the guide means, the engagement state causes the rotary arm to move horizontally. The movement of the second gear is prevented, and the first arm is moved along the outer peripheral surface of the second gear to move the rotating arm in the vertical direction. What you did Tape recorder, characterized