JPH042438Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Conventional technology D. Problem to be solved by the invention E. Means for solving the problem F. Effect G. Example G-1. Structural explanation of mobile chassis (Fig. 2) G-2 Explanation of the structure of the guide groove (Fig. 1, Fig. 3 A and B) G-3 Explanation of the drive function of the moving chassis and tape loading means (Fig. 1, Fig. 4) G-4 Tape loading Description of operation.

(Fig. 1, Fig. 4, Fig. 6) H. Effect of the invention A: Industrial field of application The invention is a cassette-type recording and reproducing device that is most suitable for application to, for example, an 8mm video camera integrated. This invention relates to a tape that is pulled out from a tape cassette and loaded onto a rotating head drum for recording or reproduction.

B. Overview of the invention In this invention, after a tape cassette is mounted on a chassis and a pair of left and right internal tape reels are engaged with a pair of left and right reel stands, the chassis with the tape cassette mounted thereon is moved to release the tape. The cassette is brought close to the rotating head drum, and a tape loading means pulls out the tape from the tape cassette and loads it onto the rotating head drum, thereby reducing the size of the entire device. In the recording/reproducing apparatus, the side of the chassis to be moved constitutes a guide groove for guiding the movement of the loading means in order to accurately position the chassis to be moved and bring it into contact with the chassis on the fixed side on which the rotating head drum is provided. A protrusion that causes the one rail portion to come into contact with the other rail portion in advance of the tip portion of one of the pair of guide rail portions provided on the fixed chassis or the contact portion that abuts with one of the guide rail portions of the fixed chassis. The distal end surface of the protrusion and the surface with which the protrusion comes into contact are inclined abutment surfaces that are inclined in the direction of movement when the movable chassis is moved toward the fixed chassis.

C. Prior Art Conventionally, in a cassette-type video tape recorder such as an 8mm video tape recorder with an integrated camera, after a tape cassette is mounted on a chassis and a pair of internal left and right tape reels are engaged with a pair of left and right reel stands. The tape is pulled out from the tape cassette by the tape loading means and loaded onto the rotating head drum, and in this state, while the tape is running at a constant speed along the loading path, recording or playback is performed by the rotation of the rotating head drum. is configured to do so.

D Problems to be solved by the invention In conventional cassette-type tape recorders, when the tape cassette is mounted on the chassis and engaged with a pair of left and right reel stands, etc., the tape cassette and the tape stored inside are Place the tape cassette in a safe position far enough away from the rotating head drum to prevent the tape cassette from accidentally touching the rotating head drum and damaging each other (especially when the upper drum is a rotating drum). It is mounted on the chassis.

However, the overall size of the video tape recorder has increased by the distance that the tape cassette is separated from the rotating head drum.

Therefore, a method for reducing the distance between the tape cassette and the rotary head drum is very important in reducing the overall size of the video tape recorder.

Therefore, the applicant of the present application greatly reduced the distance between the tape cassette mounted on the chassis and the rotating head drum, while achieving extremely high tape running stability and recording and playback accuracy. We have submitted a cassette-type recording/playback device that has achieved miniaturization of the entire device.

This cassette-type recording/reproducing device includes a fixed chassis on which a rotating head drum is attached, and a movable chassis on which a pair of left and right reel stands are attached and a guide groove for guiding a tape loading means. A movable chassis is movably mounted on a fixed chassis to move a guide groove consisting of a pair of left and right reel stands and a pair of guide rails in the direction of distance from and near the rotating head drum, and a tape cassette is mounted on the movable chassis so that the internal After the pair of left and right tape reels are engaged with the pair of left and right reel stands, the tape cassette and guide groove are moved by a moving chassis to approach the rotating head drum, and the tape cassette and the guide groove are moved while being guided by the guide groove. The tape is drawn out from the tape cassette and loaded onto the rotating head drum by the means.

According to the cassette type recording/reproducing apparatus constructed in this manner, while the tape cassette is moved by the movable chassis, a guide consisting of a pair of guide rails provided on the movable chassis and moved together with the movable chassis is provided. Since the tape loading means is guided by the groove, the movement locus of the tape loading means relative to the tape cassette being moved can be accurately defined, and
The length of the guide groove can be made very short,
It is possible to achieve miniaturization of the entire device.

However, if the pair of guide rails constituting the guide groove provided on the movable chassis side are deformed, when the movable chassis is moved close to the fixed chassis, the movement between the movable chassis and the fixed chassis may Since there is a clearance between them, there is a risk that the guide grooves provided on the fixed chassis side will not match accurately, and there is a risk that the tape loading means will not be able to be moved smoothly. In particular, the guide rail part constituting the guide groove on the movable chassis side is formed by outsert molding on the chassis using synthetic resin, and the side that abuts against the fixed chassis is formed to protrude from the movable chassis. In this case, deformation of the guide rail portion cannot be sufficiently suppressed, and there is a possibility that stable moving operation of the tape loading means cannot be sufficiently guaranteed.

Therefore, the present invention provides a guide rail part made of synthetic resin, with the tip side that comes into contact with the fixed chassis protruding from the movable chassis, and the tip side is easily deformed. This has also been proposed for the purpose of providing a cassette type recording and reproducing apparatus in which the guide rail portion can be accurately positioned and brought close to the fixed chassis to achieve stable movement of the tape loading means.

E. Means for Solving the Problems In order to solve the above-mentioned problems and achieve the above objectives, the present invention has a fixed chassis with a rotating head drum attached to the top, and a pair of left and right reel stands mounted on the top. It is equipped with a movable chassis that is attached to the tape loading means and is provided with a guide groove for guiding the tape loading means. After the moving chassis is movably mounted on the fixed chassis, the tape cassette is mounted on the moving chassis, and the pair of left and right internal tape reels are engaged with the pair of left and right reel stands, the tape cassette and guide groove are moved. A cassette-type recording/reproducing device that is moved by a chassis to bring it close to a rotating head drum, and is configured to pull out the tape in the tape cassette and load it onto the rotating head drum by a loading means that is moved while being guided by a guide groove. In the device, the one rail part is brought into contact with the tip end of one of the pair of guide rail parts or the contact part that contacts one of the guide rail parts of the fixed chassis in advance of the other rail part. A protrusion is provided, and a fitting recess for receiving the protrusion is formed at the tip of one of the fixed chassis or the pair of guide rails on the opposite side of the protrusion, and the tip face of the protrusion and the protrusion The distal end surface of the fitting recess with which the portion abuts is an abutment surface that is inclined with respect to the direction in which the movable chassis is moved toward the fixed chassis.

F. Effect The present invention provides for attaching the one rail section to the distal end of one of the pair of guide rail sections provided on the moving chassis or the abutment section that abuts on one of the guide rail sections of the fixed chassis. Providing a protrusion that comes into contact with the rail part in advance, and forming a fitting recess for receiving the protrusion at the tip of one of the fixed chassis or the pair of guide rail parts on the opposite side of the protrusion, The tip surface of the protrusion and the tip surface of the fitting recess with which the protrusion comes into contact are abutment surfaces that are inclined with respect to the direction in which the movable chassis is moved toward the fixed chassis, so that the inclined abutment surfaces While regulating the ends of the rails, the pair of rails are brought close to and in contact with the stationary chassis side, and the chassis to be moved is accurately positioned and attached to the stationary chassis where the rotating head drum is installed. By bringing them into contact with each other, it is possible to prevent misalignment of the guide grooves on the movable chassis side and the fixed chassis side, allowing stable movement guidance of the loading means.

G. Embodiment Hereinafter, an embodiment in which the present invention is applied to an 8 mm video camera integrated therein will be described based on the drawings.

The above 8mm video to which the present invention is applied is the first
As shown in the figure, a fixed chassis 2 has a rotary head drum 1 attached to the upper part, a pair of left and right reel stands 3a and 3b are attached to the upper part, and a pair of guide grooves guide a pair of tape loading means 4 and 5, respectively. 6 and 7 are provided.

G-1 Structure of the movable chassis (Fig. 2) First, the structure of the movable chassis 8, which is equipped with the characteristic structure of the present invention, will be explained.As shown in Fig. 2, the movable chassis 8 is made of stainless steel plate, etc. The metal plate is processed into a highly accurate horizontal flat plate. A pair of left and right reel stands consisting of a supply reel stand 3a and a take-up reel 3b are rotatably attached to the upper part of the rear end of the movable chassis 8. An opening 9 is provided in which the drive mechanism is arranged. Furthermore, slide guide holes 10, which are elongated holes extending in the front-rear direction, are provided in four locations on the front, rear, left and right sides of the movable chassis 8 in parallel to each other. Further, a pair of left and right cassette positioning pins 11 and a cassette mounting table 12 are attached to the upper part of the movable chassis 8, respectively.

G-2 Structure of guide groove (Fig. 1, Fig. 3 A and B) Furthermore, on the front end side of the movable chassis 8, a pair of left and right guide grooves are provided for guiding the pair of left and right tape loading means 4 and 5, respectively. guide grooves 6 and 7 are provided. These guide groove portions 6 and 7 are arranged in pairs of opposing guide rail portions 6a and 6, respectively.
b, 7a, and 7b. Each pair of guide rail portions 6a, 6b and 7a, 7b
is formed by outsert molding a synthetic resin such as polyacetal resin onto a movable chassis 8 made of a metal plate. The guide groove portions 6 and 7 constituted by these guide rail portions 6a, 6b and 7a, 7b are formed by appropriately curving their midway portions, and have respective open tips (front ends).
The rear end is connected to the guide rail parts 6a, 6b and 7a, 7b.
are connected and closed.

Then, the guide rail portions 6a, 6b and 7
The distal end sides of a and 7b are formed to protrude forward of the movable chassis 8 without intervening the movable chassis 8, and are formed like a cantilever support structure.

In addition, the guide rail portions 6a, 6b and 7
a, 7b, and on both left and right sides of the tips of the guide grooves 6, 7, there are pairs of upper and lower connecting claws 13a, 13b, 14a, 14b, 15, respectively.
a, 15b and 16a, 16b are integrally formed to protrude forward in the moving direction of the movable chassis 8. These connecting claws 13a, 13b, 14
a, 14b, 15a, 15b and 16a, 16b
The inside of the tip has an inclined guide surface 17a, 1 which guides the connection when it is connected to the fixed chassis 2.
7b is formed.

By the way, the open end side of the guide groove portion 6 located on the side of the supply reel stand 3a is connected to the movable chassis 8.
The tip surfaces 18 and 19 of the pair of guide rail sections 6a and 6b constituting the guide groove section 6 are formed as horizontal surfaces orthogonal to the moving direction of the movable chassis 8. (See Figure 1).

On the other hand, the open end side of the guide groove 7 located on the side of the take-up reel stand 3b is inclined so as to be bent with respect to the moving direction of the movable chassis 8. Of the pair of guide rail parts 7a and 6b constituting the guide groove part 7, the tip of one guide rail part 7a is connected to the tip of the other guide rail part 7b as shown in FIGS. 3A and 3B. The one rail portion 7a is protruded in the extending direction of the inclined guide groove portion 7 to connect the other rail portion 7a to the other rail portion 7.
It is formed as a protrusion 20 that comes into contact with the fixed chassis 2 side in advance of b. This protrusion 20
The distal end surface is perpendicular to the inclined distal end side of the guide groove portion 7, and is formed as a surface inclined in the moving direction of the movable chassis 8. Since this inclined surface is formed on the distal end surface of the protrusion 20, when the movable chassis 8 is moved toward the fixed chassis 2, it becomes an inclined abutting surface 21 that is inclined in the direction of movement. Ru. Note that the tip end surface of the other guide rail portion 7b is also formed into an inclined surface 22 parallel to the inclined abutment surface 21 described above.

Further, the lateral side of the protruding portion 20 is a surface perpendicular to the moving direction of the movable chassis 8, and the connecting claw portions 15a, 15b are provided in this portion.

G-3 Drive mechanism of moving chassis and tape loading means (Figs. 1 and 4) Furthermore, as shown in Fig. 4, the fixed chassis 2 is constructed of metal such as aluminum. A rotary head drum 1 is attached to the upper part of the front end of the fixed chassis 2 via a drum base. As shown in FIG. 1, this rotary head drum 1 is mounted so as to be inclined at a predetermined angle in the direction of an arrow a, which is inclined at a predetermined angle θ ₁ with respect to a reference line P parallel to the front surface of a tape cassette, which will be described later. ing. Further, guide pins 25 are fixed to the upper part of the fixed chassis 2 at four locations on the front, back, left and right, and the movable chassis 8 is engaged with the upper ends of these four guide pins 25 through four guide holes 10. It is mounted horizontally. The movable chassis 8 is placed on the fixed chassis 2 and is guided by four guide pins 25 and guide holes 10 to be horizontal in the direction of arrows a and c in FIG. It is configured to be movable.

Next, a drive gear 26 consisting of a partial gear is rotatably supported on the upper part of the fixed chassis 2 as shown in FIG. is installed. A guide plate 29 having a guide hole 28 with which the drive pin 27 is engaged from below is fixed to the lower surface of the movable chassis 8 by a plurality of set screws 30. The guide hole 28 is an elongated hole, and has a straight portion 28a perpendicular to the direction of arrow a, which is the moving direction of the movable chassis 8, and a circular arc portion 28b centered on the central axis 31 of the drive gear 26. have.

Next, a pair of left and right tape loading means 4,
5 is constituted by a vertical rotating guide 33 consisting of a rotating roller mounted on a moving block 32 and an inclined guide 34 consisting of a fixed pin. A pair of guide pins 35a and 35b are attached to the lower surfaces of both moving blocks 32 and engage with the guide grooves 6 and 7, respectively. These tape loading means 4 and 5 are connected to each pair of guide rail portions 6a and 6b of the movable chassis 8 by means of these moving blocks 32.
and 7a, 7b, and both guide pins 35
By driving the tape loading means 4 and 5 while being guided by the guide grooves 6 and 7, the moving blocks 32 move the tape loading means 4 and 5 to the guide rails 6a, 6b and 7a, respectively. The rotary head drum 1 is configured to be moved horizontally on the rotary head drum 1 in the direction of arrows d and e, which are distance directions relative to the rotary head drum 1.

Next, a pair of left and right drive rings 36a and 36b having a substantially semicircular arc shape are arranged symmetrically in the upper part of the fixed chassis 2 near the outer periphery of the rotary head drum 1 so as to overlap each other from above and below. . And these two drive rings 36a,
36b has outer peripheral gears 37a, 37b and arc-shaped guide holes 38a, 38b, and a pair of left and right guide pins 3 fixed on the fixed chassis 2.
9 through guide holes 38a and 38b, and is configured to be horizontally movable in the directions of arrows f and g in FIG.

Next, on the upper part of the fixed chassis 2, a pair of drive gears 40a and 40b are respectively meshed with outer peripheral gears 37a and 37b of both drive rings 36a and 36b.
are rotatably supported in a mutually meshed state, and an outer peripheral gear 37a of one drive ring 36a
and the drive gear 26.
1 is installed. Further, these drive motors 42 are attached to the upper part of the fixed chassis 2, and the motor 42 and one of the drive gears 40
A gear train 43 is attached to transmit power between the a and the a.

The guide pins 35a of one of the tape loading means 4, 5 are connected to the drive rings 36a, 36b via a limiter spring 43, a slider 44, a link 45, etc., respectively, as shown in FIG. Both drive rings 36a, 3
6b is driven in the directions of arrows f and g in FIG.
and 7a, 7b so as to be pushed and pulled in the directions of arrows d and e in FIG. By the way, the slider 44 is provided so as to be slidable in the rotating direction of the drive ring 36a, and is connected to the drive ring 36a by a tension spring 43. Further, the guide pin 35a is connected to the slider 4 via a link 45.
4 and is guided by a guide groove 6.

Further, a pair of horizontal guide positioning bases 46a and 46b are integrally provided at both left and right ends of the drum base. A pair of guide grooves 47, 48 are provided on both guide positioning bases 46a, 46b, to which the tips of both guide grooves 6, 7 on the movable chassis 8 side are connected. These guide grooves 47 and 48 have open ends so as to be continuous with the guide grooves 6 and 7 on the moving chassis 8 side, respectively. In addition, the guide groove portion 4
7, 48 both side tip surfaces 47a, 47b, 48a,
48b is the guide groove portion 6, 7 on the movable chassis 8 side.
In order to be able to approach the connection portion without creating a large gap when the two are connected, the guide groove portion 6 is formed in the direction of movement of the movable chassis 8.
The tip surfaces 18, 19 and the inclined abutment surface 2 that constitute the
1. It is formed at an angle corresponding to the inclined surface 22. Furthermore, the inclination angles of the inclined end surfaces 47a, 47b, 48a, 48b of the guide grooves 47, 48 are different from those of the connecting claws 1 provided on the movable chassis 8 side.
3a, 13b, 14a, 14b, 15a, 15b
The angle of inclination is approximately the same as that of the inclined surfaces 17a and 17b of 16a and 16b. Furthermore, on the side to which the inclined abutment surface 21 of the guide groove 48 corresponding to the guide groove 7 of the movable chassis 8 located on the take-up reel stand 3b side corresponds, there is a tip end surface 48a that becomes the inclined abutment surface. A fitting recess 50 is formed into which the tip end portion including the protruding portion 20 of one of the guide rail portions 7a constituting the guide groove portion 7 is inserted. This fitting recess 5
An inclined guide surface 50a is formed on one side of the distal end side of the guide rail portion 7a to guide the entry of the distal end portion of the guide rail portion 7a.

Further, as shown in FIG. 2, a tension detection pin 51 is rotatably attached to one side of the front end of the movable chassis 8 via an arm 52 and a fulcrum shaft 53. On the other side of the front end, a tape pull-out pin 54 and a pinch roller 55 are connected to arms 56, 57 and a fulcrum shaft 5, respectively.
8 and 59, respectively, so as to be rotatable. The tension detection pin 51 is connected to a band brake 60 that is mounted on the movable chassis 8 and adjusts the braking force of the supply reel stand 3a.

Further, as shown in FIG. 1, a capstan 62 and an impedance roller 63 are rotatably mounted on the fixed chassis 2 at the left and right sides of the rotary head drum 1, respectively. Further, a reel stand drive mechanism 64 is mounted on the fixed chassis 17 at an intermediate position between both reel stands 3a and 3b. This reel stand drive mechanism 64 includes a drive gear 65, an oscillating gear 66 that is always meshed with the drive gear 65, and a drive gear 65.
A swinging lever 6 which is rotatably supported on a central shaft 67 and has a swinging gear 66 rotatably supported at its tip.
8, and is arranged within the opening 9 of the movable chassis 1. Then, the drive gear 65 is driven to rotate in forward and reverse directions by a drive motor (not shown) for the captan 62.
The oscillating gear 66 is oscillating (oscillating) in accordance with the rotational direction of the drive gear 65, and both reel stands 3
It is configured to selectively mesh with a pair of reel stand gears 69a, 69b provided on the lower surfaces of reel stand gears 69a, 3b, and selectively drive these reel stand gears 69a, 69b.

Further, as shown in FIG.
A tape (magnetic tape) 73 wound on a pair of left and right reels consisting of a take-up reel 2a and a take-up reel 72b is stored, and the original tape 73 is guided by a pair of left and right tape guides 74 in the tape cassette 71. The tape is passed along the front opening 75 of the tape cassette 71. Further, the tape cassette 71 is provided with a rotatable opening/closing lid 76 for opening and closing the front opening 75 and a bottom opening 77 connected to the front opening 75.

G-4 Explanation of tape loading operation (first
(Figs. 4 and 6) First, in front of the cassette device, the movable chassis 8 is moved back in the direction of arrow b to the return position shown in FIG. 1 by a large distance ₁ . In this return movement state, the drive pin 27 of the drive gear 26 is moved back in the direction of arrow j to the return position shown by the dashed line in FIG. In addition, both tape loading means 2 are provided in front of this cassette device.
4, 25, tension detection pin 5
1. Tape pull-out pin 54 and pinch roller 55
are each moved back to the back movement position shown in FIG.

Next, in this state, the tape cassette 71 is mounted onto the movable chassis 8 from above by a cassette mounting device (not shown) as shown in FIG. It is positioned above and installed. Then, both the tape loading means 4 and 5, the tension detection pin 51, the tape pull-out pin 54, and the pinch roller 55 are inserted into the tape 73 from the bottom opening 77 of the tape cassette 71, and the opening/closing lid 7
6 is rotated by the lid opening means, and the front opening 75 of the tape cassette 71 is opened.

Next, the tape loading operation is performed by driving the motor 42 to rotate in the forward direction after the above-mentioned cassette loading is completed.

That is, when the motor 42 is driven to rotate in the forward direction, both drive gears 40a and 40b are rotated through the gear train 43.
are driven to rotate in opposite directions to each other, and both drive gears 4
Both drive rings 36a, 36b by 0a, 40b
are respectively driven in the direction of arrow g in FIG. Also. The drive gear 26 is driven by the outer gear 37a of one drive ring 36a via the gear train 41, and the drive pin 27 is rotated by a predetermined angle θ ₂ in the direction of arrow k in FIG.

However, at this time, while the drive pin 27 is rotated in the direction of the arrow k by an angle θ ₃ from the return position indicated by the dashed line to the intermediate position indicated by the dotted line in FIG.
7 is the straight part 28a of the guide hole 28 of the guide plate 29
Push in the direction of arrow c. As a result, the movable chassis 8 is driven by the driving pin 27, and the movable chassis 8 is horizontally moved in the direction of arrow c from the backward movement position shown in FIG. 1 to the forward movement position shown in FIG. After the movable chassis 1 reaches the forward movement position and is stopped,
The drive pin 27 is rotated by the remaining angle θ ₄ in the direction of arrow k along the arc within the arc portion 28b of the guide hole 28 from the intermediate position indicated by the dotted line to the forward movement position indicated by the solid line in FIG.

Then, the tape cassette 71 is moved along with both reel stands 3a and 3b in the direction of arrow c by this moving chassis 8, and as shown in FIG. is reduced to a small distance, and the tape cassette 71 is brought close to the rotary head drum 1.

Further, the pair of guide grooves 6 and 7 are also moved integrally with the movable chassis 8 in the direction of the arrow c in FIGS. 1 and 6, and are brought close to both sides of the rotary head drum 1 as shown in FIG. Connection claws 13 are provided on both left and right sides of the tips of the guide grooves 6 and 7.
a, 13b, 14a, 14b, 15a, 15b and 16a, 16b are both guide positioning bases 46
The guide grooves 47a, 46b engage with the opposite end surfaces 47a, 47b, 48a, 48b of the guide grooves 47, 48. At this time, one guide rail portion 7a forming the guide groove portion 7 located on the take-up reel stand 3b side
The leading end portion of the fitting recess 50 enters the fitting recess 50 . Even if the tip portion is displaced during this entry, the tip portion is regulated by the inclined guide surface 50a and advances so as to fit into the fitting recess 50.

Next, when the movable chassis 8 is further moved toward the rotary head drum 1, the guide groove 7
The inclined abutment surface 21 of the protrusion 20 provided at the tip of one guide rail portion 7a that constitutes the guide rail portion 7a abuts the inclined tip surface 48a on one side of the guide groove portion 48. Then, while being guided by this inclined tip surface 48a, the protrusion 20 receives a correction force in the direction of the arrow x in FIG. 3B, comes into close contact with the tip surface 48a, and comes to follow this tip surface 48a. Then, the guide groove 7 on the movable chassis 8 side and the guide groove 48 are aligned and connected. In this embodiment, a clearance is provided between the inclined surface 22 of the other guide rail portion 7b and the tip end surface 48b of the guide groove portion 48, and the guide groove portion 7 is slightly wider on the guide rail portion 7b side. If you set it so that it is, there is no need for positioning.

At this time, each guide rail part 6a, 6b and 7a, 7b constituting the guide groove parts 6, 7 is molded from synthetic resin and has appropriate elasticity, so as mentioned above, one guide rail part 7a is If it is set to be located somewhat on the guide groove 7 side, it will be easily displaced and the position will be regulated.
a, 15b and 16a, 16b are the inclined guide surfaces 17a, 17b and the guide positioning base 4.
Both guide grooves 6, 7 are mutually guided by the slopes of the end surfaces 47a, 47b, 48a, 48b of the guide grooves 47, 48 of 6a, 46b and engaged vertically. It is safely and reliably connected to the guide positioning bases 46a and 46b.

Therefore, the guide grooves 6 and 7 are connected to the guide grooves 47 and 48 of both guide positioning bases 46a and 46b with their positions restricted in the horizontal and vertical directions.

On the other hand, as the movable chassis 8 moves in the direction of arrow c, both tape loading means 4 and 5 are moved back and forth in FIG. The rotary head drum 1 is moved horizontally from the position shown in FIG. 6 to a position near both sides of the rotary head drum 1, which is the forward movement position shown in FIG. That is, both tape loading means 4, 5
is guided by both guide grooves 6 and 7 which are moved together with the movable chassis 8 in the direction of arrow c.
They are each moved in the direction of arrow e in the figure. When both tape loading means 4 and 5 reach the forward movement position, these moving blocks 32 are transferred from both guide rail parts 6a, 6b, 7a, and 7b onto both guide positioning bases 46a and 46b, and Each pair of guide pins 35a, 35b enters into both guide grooves 47, 48 from both guide grooves 6, 7, and is positioned at their respective forward movement positions by the spring force of these limiter springs 43, etc. be done.

Then, the tape 73 in the tape cassette 71 is pulled out horizontally from the front opening 75 by the two preceding vertical rotation guides 33 of both the tape loading means 4 and 5, and is tilted as shown in FIG. It is loaded onto the circumferential surface of the rotary head drum 1 in a spiral shape having a predetermined wrapping angle in a substantially M shape.
At this time, in synchronization with the movement of the movable chassis 8 in the direction of arrow c, the tension detection pin 51, the tape pull-out pin 54, and the pinch roller 55 are each driven by another drive mechanism (not shown).
These are moved in the directions of arrows n, o, and q, respectively, from the backward movement position shown in FIG. 1 to the forward movement position shown in FIG. With the above, a series of tape loading operations is completed.
Motor 42 is stopped.

Next, after the above-mentioned tape loading is completed, the tape 73 is pressed onto the capstan 62 by the pinch roller 55 as shown in FIG.
The recording medium is run at a constant speed on a loading path so as to be wound up, and recording and reproduction are performed by the rotation of the upper drum of the rotary head drum 1.

Note that the tape loading operation is performed by the motor 42.
The tape loading operation described above is performed by rotating the tape in the opposite direction.

In the above-described embodiment, the guide rail portion 7 constituting the guide groove portion 7 located on the take-up reel stand 3b side
Although the protruding portions 20 and the inclined abutment surfaces 21 are provided on the sides a and 7b, the guide groove portion 6 side located on the supply reel stand 3a side may also have a similar configuration.

Further, the same effect can be obtained even if the protruding portion 20 is provided on the guide positioning bases 46a and 46b provided on the fixed chassis 2.

H. Effects of the invention The present invention provides that the tip of one of the pair of guide rail parts provided on the chassis to be moved as described above or the abutment part that contacts one of the guide rail parts of the fixed chassis is A protruding portion is provided for causing one rail portion to come into contact with the other rail portion in advance, and a fitting is provided to receive the protruding portion on the tip end of one of the fixed chassis or the pair of guide rail portions on the opposite side to the protruding portion. A mating recess is formed, and the distal end surface of the protrusion and the distal end surface of the mating recess that the protrusion comes into contact with are abutment surfaces that are inclined with respect to the direction in which the movable chassis is moved toward the fixed chassis. , the pair of rails are brought close to the stationary chassis and brought into contact with each other while regulating the tips of the rails with the inclined abutment surface, thereby accurately positioning the moving chassis and providing a rotating head drum. By bringing the guide groove into contact with the fixed chassis, it is possible to prevent misalignment of the guide grooves on the movable chassis side and the fixed chassis side, thereby enabling stable movement guidance of the loading means.

According to the present invention, the guide rail portion is provided by protruding from the movable chassis the distal end side which is made of synthetic resin and comes into contact with the fixed chassis side, and the distal end side is easily deformable. However, the guide rail portion can be accurately positioned and brought close to the fixed chassis, thereby achieving stable movement of the tape loading means.

[Brief explanation of drawings]

FIG. 1 is a plan view of a cassette-type recording and reproducing apparatus according to the present invention, FIG. 2 is a perspective view of a movable chassis, and FIGS. 3A and 3B are plan views showing the main parts of the present invention. 4 is a plan view of the fixed chassis, FIG. 5 is a partially enlarged plan view, and FIG. 6 is a plan view of the movable chassis in a state where it has been moved to the loading position. DESCRIPTION OF SYMBOLS 1... Rotating head drum, 2... Fixed chassis, 3a, 3b... Reel stand, 4, 5... Tape loading means, 6, 7... Guide groove, 6
a, 6b, 7a, 7b...guide rail section, 8...
...Moving chassis, 20... Protrusion, 21... Inclined abutment surface, 47, 48... Fixed chassis side guide groove, 48a... Tip surface that becomes the inclined abutment surface.

Claims (1)

[Scope of Claim for Utility Model Registration] A fixed chassis with a rotating head drum attached to the top, and a movable chassis with a pair of left and right reel stands attached to the top and a guide groove for guiding the tape loading means. A movable chassis is movably mounted on a fixed chassis so that a guide groove consisting of a pair of left and right reel stands and a pair of synthetic resin guide rails can be moved in the direction of distance from and near the rotating head drum, and a tape cassette is mounted on the movable chassis. After engaging the pair of internal left and right tape reels with the pair of left and right reel stands, the tape cassette and the guide groove are moved by a moving chassis to bring them close to the rotating head drum, and then moved while being guided by the guide groove. In a cassette-type recording/reproducing apparatus configured to pull out a tape from a tape cassette and load it onto a rotating head drum using a loading means, the tip of one of the pair of guide rail sections or the guide rail of the fixed chassis is provided. A protruding portion is provided on the abutting portion that abuts one of the rail portions, and the fixed chassis or the pair of guide rails is provided on the opposite side of the protruding portion. A fitting recess for receiving the protruding part is formed at one tip of the part, and the movable chassis moves the distal end surface of the protruding part and the distal end surface of the fitting recess that the protruding part comes into contact with toward the fixed chassis. A cassette-type recording/reproducing device having an abutting surface inclined with respect to the direction in which the data is played.