JPS6318569A - Recording medium loading mechanism - Google Patents

Abstract

PURPOSE:To simplify a constitution and to ensure the operation of the titled mechanism by forming a rack that extends approximately in L-shaped state from a recording medium carrying member, transferring this rack by means of a pinion gear supported by a supporter body to move both a sliding body and the recording medium carrying member together. CONSTITUTION:The sliding body 5 supported by the supporting body 6 freely movably in a horizontal direction, and the recording medium carrying member 7 supported by the sliding body 5 freely movably in upward and downward directions, are provided. And the rack 9 so formed as extending in approximately L-shaped state from the recording medium carrying member 7 is transferred by the pinion gear 11 supported by the supporting body 6. At the time when the pinion gear 11 is engaged with the horizontal part 9a of the rack 9, the sliding body 5 is moved horizontally together with the recording medium carrying member 7, but at the time when the pinion gear 11 is engaged with the vertical part of the rack 9, only the member 7 is moved up and down. Further, a repulsing means 25 to energize the rack in one direction is provided to maintain the engagement between the rack and the pinion gear, so the operation is ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION The recording medium loading mechanism of the present invention will be explained according to the following items.

A. Industrial field of application B1 Overview of the invention C1 Background technology Problem to be solved by the invention [Figure 7] E0 Means for solving the problem F Example a Overview of VTR [First Figures to Figures 6] b, Support body [Figures 1 to 3] C0 recording/reproducing unit [Figures 1 to 6] d, Tape cassette loading mechanism [Figures 1 to 6]
[Figures] d-1, Drive section [Figure 3] d-2, Sliding body [Figures 1 to 5] d-2-a, Main part [first corner of mouth to Figures 3 and 5] d -2-b, Cassette carrier support means [Figures 1, 3, and 5 d-3, Cassette carrier [Figures 1 to 4, and 6] d-3-a, Cassette mounting Plate [Figures 2 to 4, Figure 6] d-3-b, Side plate [First National Power to Figure 3, Figure 6] d-3-c, Rack [Figure 1, Figure 6] d-3-d,! Raising [Figs. 2 to 4, 6] d-3-e, Support of cassette carrier [Figs. 1 to 3, 5, 6] d-4, Cassette carrier and slide Movement of the moving object d-4-a, movement in the loading direction d-4-b, movement in the unloading direction d-5, tape cassette loading and unloading operation d-5-a, loading operation d-5 -b. Unloading operation G9 Effects of the invention (A. Field of industrial application) The present invention relates to a novel recording medium loading mechanism. Specifically, we would like to propose a new recording medium loading mechanism in which the recording medium conveyance member moves along eight approximately horizontally tilted loci, which has a simplified structure and ensures mobility. That is.

(B. Summary of the Invention) The recording medium loading mechanism of the present invention supports a recording medium transport member movably in the vertical direction on a sliding body that is supported movably in the horizontal direction on a support body. There are two members that form a rack extending in the shape of a letter and move this rack by a pinion gear supported on the support so that the sliding body and the recording medium conveying member move together so that they are pushed υ relative to the support. However, by simplifying the structure by requiring only one driving part, and by providing an elastic means for biasing the rack in one direction, the engagement between the rack and the pinion gear can be maintained reliably, and the operation can therefore be improved. It has been made certain.

(C. Background Art) Recently, recording media such as magnetic tapes and magnetic disks used in recording and reproducing systems are often housed in predetermined cassette cases such as tape cassettes and magnetic disk cassettes.

In addition, recording/playback equipment that uses these recording media has
Usually, a recording medium loading mechanism is provided that includes a recording medium transport member that is moved between an eject position where the recording medium is loaded and unloaded and a loading completion position where the recording medium is loaded into the recording/playback section. The recording medium is mounted on the recording/reproducing section by moving the recording medium conveying member to a loading completion position with the recording medium placed on the recording medium conveying member.

In addition, when moving a tape cassette, etc., it is necessary to engage the drive member provided in the recording/reproducing unit with the tape reel housed in the tape cassette, so the recording medium conveying member is pulled into the recording/reproducing device and then It is necessary to follow a descending trajectory in the shape of an almost horizontal character.

(D. Problems to be Solved by the Invention) [Fig. 7] By the way, in order to continuously move a certain member in two different directions, the drive mechanism thereof generally becomes complicated.

Therefore, as a simplified version of such a drive mechanism, a mechanism a shown in FIG. 7 can be considered.

In the figure, b is a sliding body supported on the side of the outer casing C (only a part of its front plate is shown in the drawing) so as to be movable in the front and back direction, and the cassette carrier d is attached to the sliding body. It can be moved up and down.

It is widely supported.

The cassette carrier d includes two side plates e and e' located apart from each other in the left and right direction, and a cassette mounting plate f whose left and right sides are attached to the two side plates e and e', The side plate e%e' is supported by the sliding member so that it can freely slide in the vertical direction. In addition, racks g and g' are formed on the bottom and front surfaces of the side plate e%e' and extend continuously to these two surfaces, and the racks g and g' are supported on the outer casing C side. It is meshed with two feed gears h and h'.

Note that the feed gears h and h'' are fixed to both ends of a rotating shaft i rotated by a motor.

Then, the cassette carrier d is at the eject position where it protrudes outside the outer casing C when the rear end of the rack g1g' is engaged with the feed gear h%h'. By rotating counterclockwise in FIG. 7, racks g and h' are rotated eight times along a locus of movement that forms a substantially upside down character shape as shown by the dashed-dotted line arrow in FIG. When the upper end of the tape cassette j is engaged with the feed gears h and h, the cassette mounting plate fk comes to the loading completion position where the placed tape cassette j is mounted on the recording/reproducing section.

The sliding body is moved by the cassette carrier d while the cassette carrier d moves along the horizontal part of its movement locus, and when the cassette carrier d comes to the eject position, almost all of the sliding body touches the front plate k of the outer casing C. When the cassette carrier d is moved from the eject position to the bending point position of the sideways character shape of the movement trajectory, the front surface of the cassette carrier d is projected from the opening 1 formed in the opening 1. The retracted position is reached in such a way as to close the area.

In such a tape cassette loading mechanism a, the mechanism for driving the cassette carrier d is extremely simple.

However, in such a mechanism a, an appropriate amount of play is required between the sliding body and the cassette carrier d, and the racks g and g' provided on the cassette carrier d and the feed gears h and h' Appropriate play, so-called backlash, is also necessary between the two.

While the racks g, g' are engaged with the feed gear h1h' at their horizontal portions, the weight of the cassette carrier d maintains the engagement between the racks g, g' and the feed gears h, h', which is good. When the vertical portion comes into mesh with the feed gear h%h', an accident often occurs in which the racks g, g' and the feed gears h, h' become disengaged due to the above-mentioned play. If such an accident occurs, the posture of the cassette carrier d deviates from its normal posture, which may interfere with tape loading or place an unreasonable load on the device, tape cassette, etc., resulting in a serious accident. There is a problem that it can become a trigger.

(E. Means for Solving the Problems) In order to solve the above-mentioned problems, the recording medium loading mechanism of the present invention has a recording medium conveying member mounted on a sliding body that is supported by a support body so as to be movable in the horizontal direction. A rack supported movably in the vertical direction and extending in an oval shape is formed on the recording medium conveying member, and this rack is fed by a pinion gear supported on the support, and an elastic force biases the rack in one direction. A means of issuing such information is provided.

Therefore, according to the recording medium loading mechanism of the present invention, the recording medium conveying member is supported movably in the vertical direction on the sliding body supported movably in the horizontal direction on the support body, and the recording medium conveying member is provided with an abbreviated shape. By forming an extending rack and sending this rack by a pinion gear supported on a support, the sliding body and the recording medium conveying member are moved together, even though there are two members that move relative to the support. The structure can be simplified by requiring only one driving part, and by providing an elastic means that biases in one direction, the engagement between the rack and pinion gear can be maintained reliably, thereby ensuring reliable operation. You can also do that.

(F. Embodiment) Details of the recording medium loading mechanism of the present invention will be described below according to the embodiment shown in the accompanying drawings.

The embodiment shown in the drawings is a video tape recorder (hereinafter referred to as rVTRJ) in which the recording medium loading mechanism of the present invention is used as a cassette loading method using a so-called linear skating method.
Say. )'s tape cassette loading mechanism.

(a. Outline of VTR) [Figures 1 to 6] 1 is VTR
It is.

2 is the outer casing of the VTRI, and its front panel 3 is an operation panel on which a predetermined display window and operation buttons are arranged.
Also, in the left-right direction (in Figure 2, the direction diagonally downward to the left is the left side, and the direction diagonally upward to the right is the right side. In addition, the direction diagonally downward to the right in the same figure is the front side, and the direction diagonally upward to the left in the same figure is the front side. An elongated opening 4 is formed in the direction (the direction is the rear side. In the following description, directions will be referred to in this direction).

Reference numeral 5 denotes a sliding body supported so as to be slidable in the front and back direction on a support 6 fixed at a position substantially corresponding to the opening 4 in the outer casing 2, and a cassette carrier 7 is mounted on the sliding body 5. It is supported so that it can move freely in the vertical direction.

On the bottom and front end surfaces of the left and right side plates 8.8' of the cassette carrier 7, racks 9 are provided which extend continuously to the two surfaces.
．． 9' are formed and these racks 9.9' are meshed with a feed gear 11.11' rotated by a drive unit 10 provided on the support 6, and the cassette carrier 7 is connected to the racks 9.9'. By being sent horizontally by the feed gear 11, 11', it is moved forward and backward, and by being sent vertically, it is moved up and down.

Furthermore, while the cassette carrier 7 moves eight times in the front-rear direction, the sliding body 5 is integrally moved eight times in the front-rear direction by the cassette carrier 7, and thereby, as shown by the thin two-dot chain line in FIG. , a position where its front end surface closes the opening 4 formed in the outer casing 2 (hereinafter referred to as the "retracted position").
As shown in FIGS. 2 to 4, and as shown by the thick two-dot chain line in FIG. He now works eight shifts between the two.

When the sliding body 5 reaches the drawn-out position, most of the cassette carrier 7 is outside the outer casing 2, that is, the left and right side plates 8. 8' and the entire cassette mounting plate 12 constituting the bottom of the cassette carrier 7 reach a position outside the outer casing 2 (hereinafter referred to as the "eject position"), and the slider 5 When the cassette is in the retracted position, the cassette is moved eight times in the vertical direction, and when it comes to the lower end of the BwJ stroke in the vertical direction, the cassette is placed in the position shown by the two-dot chain line in FIG. The tape cassette 13 thus placed reaches a position (hereinafter referred to as "r loading completion position") where the tape cassette 13 is loaded into a recording/reproducing section which will be described later.

Therefore, the cassette carrier 7 moves along a substantially horizontally tilted movement trajectory, and the tape cassette 13 is placed on and taken out from the cassette carrier 7 while the cassette carrier 7 is at the eject position. By moving the cassette carrier 7 to the loading completion position with the tape cassette 13 placed on the cassette carrier 7, the tape cassette 13 is loaded into the recording/reproducing section.

(b, support) [Fig. 1, Fig. 3] The support body 6 consists of a lower chassis and an upper chassis.

14 is a lower chassis. The lower chassis 14 consists of a main part 15 formed in a substantially plate shape, a rear wall 16 formed upright from the rear end of the main part 15, a front wall and left and right side walls (not shown), and when viewed as a whole, It is formed into a substantially box-like shape with an open top surface.

17 is an upper chassis. The upper chassis 17 has an approximately square shape whose outer shape is approximately one size larger than the outer shape of the lower chassis 14, and is formed into a substantially frame by the front piece 18, rear piece 19, gall 20, and eight pieces 21 forming the four sides of the square. It is formed in the shape of The rear ends of the gulls 20 and 8 pieces 21 are positioned so as to protrude rearward from the rear piece 19, and the rear ends of the gulls 20 are located slightly rearward than the rear ends of the 8 pieces 21, A guide shaft support piece 22, 22' is formed at the end to protrude downward.

In addition, side pieces 23 and 23' (only the front ends thereof are shown in FIG. 3) are formed on the galls 20 and the eight pieces 21, and are bent downward from their outer edges. The front end portions of the side pieces 23, 23' are formed into guide shaft support pieces 23a, 23'a bent inward in an abbreviated shape.

24.24' is a guide shaft for slidably supporting the sliding body 5, and the rear end of the guide shaft 24.24' is supported by the rear guide shaft support piece 22.22'. The front end is supported by the front guide shaft support pieces 23a, 23'a, and therefore these two guide shafts 24, 24'
are arranged on both left and right sides of the upper chassis 17 so as to extend in the front and back direction.

Reference numeral 25 denotes a coil spring as a resilient means fitted onto the rear end of the left guide shaft 24. The action of this coil spring 25 will be described later.

26 is a crosspiece, and both left and right ends of the crosspiece 26 are connected to the gull 20 and the eight pieces 21.

As you can clearly see from Figure 3, Gal 20 and 8
Of the mutually opposing side edges of the piece 21, the rear portion of the portion between the rear piece 19 and the crosspiece 26 is positioned so as to protrude inwardly than the other portions, and a portion of the side edge facing downward is substantially perpendicular to that portion. A bent guide piece 27.27' is formed, and the front edges 27a, 27'a of the guide piece 27.27' are formed into a substantially inverted shape when viewed from the side, as shown in FIG. ing. Note that this guide piece 27, 27' is attached to the cassette carrier 7.
This is a member for guiding the moving direction of the cassette carrier 7 when the longitudinal movement and the vertical movement of the cassette carrier 7 are continuous.

The upper chassis 17 configured in this manner has its rear piece 19 placed on the upper end of the rear wall 16 of the lower chassis 14 and screwed to the rear wall 16, and its side pieces 23, 23. The mounting pieces 23b and 23'b formed near the front end of the lower chassis 14 are fixed to the lower chassis 14 by being screwed to the mounting pieces formed at the upper end of the side wall (not shown) of the lower chassis 14.

Thus, the lower chassis 14 and the upper chassis 17 are combined, thereby forming a substantially box-shaped support 6h'Jl as a whole, and two guides are provided on both left and right sides of the upper end of the support 6. The shaft 24.24' will be arranged.

Incidentally, an opening approximately the same size as the opening 4 formed in the outer casing 2 is defined between the front wall (not shown) of the lower chassis 14 and the front piece 18 of the upper chassis 17. is arranged such that its opening approaches and opposes the opening 4 of the outer casing 2 from the rear side, and is fixed to the outer casing 2.

(c, recording/reproducing section) [Fig. 1, Fig. 3, Fig. 4] 28 is a recording/reproducing section.

Reference numeral 29 denotes a mechanical chassis that serves as the base of the recording/reproducing section 28. The mechanical chassis 29 is fixed to the upper surface of the main part 15 of the lower chassis 14 of the support body 6, and a rotating 6n (not shown) is mounted approximately in the center of the rear part of the mechanical chassis 29. Head drum 3 with head
0, and two reel stands 31.3 located near the front end of the reel stand spaced apart from each other in the left and right direction.
1' is provided. 31a and 31'a are reel stands 3
1.31' reel engagement shaft.

Four cassette positioning pins 32.32' and 33.33' are provided upright in the front part of the mechanical chassis 29, and these four cassette positioning pins 32.32'
The two wood cassette positioning pins 32 and 32' on the rear side of the two cassette positioning pins 32 and 33' have a substantially conical insert portion 32 at their upper end.
a, 32'a are formed, and the two front cassette positioning pins 33 and 33' are located near the front edge of the mechanical chassis 29, and the tape cassette 13 has a cassette case 34 that is connected to these cassettes. Locating pin 3
2.32' and 33.33', the height relative to the recording/reproducing unit 28 is defined, and the rear cassette is placed in two positioning holes (not shown) formed on the bottom of the cassette case 34. Locating pin 32.32'
By inserting the insertion sections 32a and 32'a, the recording/reproducing section 28 is positioned in the horizontal direction.

Reference numeral 35 denotes a lid raising rotation pin, and the lid raising rotation pin 35 extends approximately toward the right from the upper end of the support piece 36 that is erected from approximately the center of the left side of the mechanical chassis 29 in the front-rear direction. It is provided so as to protrude horizontally, and is located at approximately the same height as the bottom surface of a lid holder, which will be described later, provided on the cassette carrier 7 when the cassette carrier 7 is located on its horizontal Sa locus. .

(d. Tape cassette loading mechanism) [Figures 1 to 6] 37 is a tape cassette loading mechanism, and the tape cassette loading mechanism 37 moves the sliding body 5, the cassette carrier 7, and the cassette carrier 7. It consists of a drive unit 10, cassette holding means, etc.

(d-1, drive unit) [Figure 3] 38 is a motor, and the motor 38 is connected to the lower chassis 14.
The drive pulley 39 is attached to the inner surface of the rear end of the left side wall (not shown), and a drive pulley 39 is fixed to its rotation @38a.

Reference numeral 40 denotes a reduction pulley having a considerably larger diameter than the driving pulley 39, and the reduction pulley 40 is integrally formed with a gear portion 41 located on the right side thereof, and is a pulley projecting substantially horizontally from the lower chassis 14. It is rotatably supported by a support @42, and an endless transmission belt 43 is stretched between the deceleration pulley 40 and the drive pulley 39.

44 and 45 are reduction gears located in front of the gear 41 of the reduction pulley 40, and these two reduction gears 44
and 45 are separately and rotatably supported by gear supports @ 46 and 47 protruding from the left side wall of the lower chassis 14, and the rear reduction gear 44 is a large gear 44a having a relatively large diameter. and a small gear 44'b having a relatively small diameter located on the right side of the large gear 44a are integrally formed.The large gear 44a meshes with the gear portion 41 of the reduction pulley 40, A gear 44b is meshed with a reduction gear 45 on the front side.

When the motor 38 rotates, the rotation is transmitted to the front reduction gear 45 through the transmission path of reduction pulley 39 - transmission belt 43 - reduction pulley 40 and its gear section 41 - rear reduction gear 44. , during such transmission, the rotational speed will be reduced to a predetermined rotational speed.

48 is a rotation axis. Most of the rotating shaft 48 is rotatably supported by a rotating shaft support member (not shown) provided on the front wall (not shown) of the lower chassis 14, and the feed gears 11, if' are fixed separately, and furthermore, a driven gear 49 is fixed to the left end thereof, and the driven gear 49 meshes with the reduction gear 45 on the front side.

Therefore, when the motor 38 rotates, the driven gear 49 is rotated, so that the rotating shaft 48 is rotated, and thereby the feed gear 11.11' is rotated.

The motor 38 rotates clockwise when viewing the VTRI from the left side when loading is performed, moving the cassette carrier 7 eight times from the eject position to the loading completion position, and rotates the cassette carrier 7 from the loading completion position to the loading completion position. When unloading to the eject position is performed, it is rotated counterclockwise. Accordingly, the feed gear 11,11' is rotated counterclockwise when loading is performed, as viewed from the left side of the VTRI, and is rotated clockwise when unloading is performed.

(d-2, sliding body) [Figures 1 to 5] (d-2-a
, main part) [Figures 1 to 3, and 5] The main parts of the sliding bodies 5 are on the left of each other. Two side plates 5o and 50' spaced apart to the right and facing each other substantially in parallel; and the side plate 5.
The front plate 51 connecting the front ends of the side plates 5o and 50' forms a substantially U-shape that is long in the front-rear direction when viewed from the top and bottom, and its width, that is, the distance between the outer surfaces of the side plates 5o and 50'. The length is approximately equal to the length in the left-right direction of the opening 4 formed in the outer casing 2, and the length in the front-rear direction is approximately the same as the length in the front-rear direction of the upper chassis 17. It has a length.

The side plates 50 and 50' are formed so that their cross-sectional shapes form a substantially U-shape that opens inwardly, and the left side plate 5o is slightly longer than the right side plate 50'.

A reinforcing material 52 is provided in the shape of a bridge between the upper pieces 50a, 50'a of the side plates 50, 50'' in the front-rear direction, and a reinforcing member 52 is provided near the front end of the upper pieces 50a, 50'a. There is a concave portion 53 having a substantially inverted trapezoidal shape when viewed from the left and right directions.
．． 53' is formed.

An insertion portion 54 protruding outward is formed at the upper part of the outer surface of the U-shaped intermediate piece 50b of the left side plate 50 at approximately one-third of the rear end. Insertion holes 55.55 are formed at both front and rear ends of the portion 54.

In addition, in substantially the same way, there is also an insertion portion projecting outward at the upper part of approximately one-third of the rear end of the outer surface of the U-shaped intermediate piece 50'b of the right side plate 50'. 54' is formed, and an insertion hole 55' is formed in the insertion portion 54'.

The sliding body 5 is inserted into the two guide shafts 24 supported by the upper chassis 17 through the insertion holes 55, 55 and 55'.
．． 24' is slidably inserted into the support body 6.
The third
As can be clearly seen from the figure, the front end surface of the insertion portion 54, 54' is brought into contact with the guide shaft support pieces 23a, 23'a of the side pieces 23, 23' of the upper chassis 17, so that the insertion portion 54, 54' is moved from the drawn-out position. The forward six movement will be blocked.

(d-2-b, cassette carrier support means) [Fig.
3, 5] 56.56 and 56'56' (see FIGS. 3 and 5) are the side plates 50.50'+7) approximately at the center of the inner surfaces of the intermediate pieces 5ob and 50'b in the front-rear direction. These two protrusions 56.
', 56', the guide groove 5 extends along the vertical direction.
7.57' are formed, and these guide grooves 57.5
The lower end of 7' is the lower piece 50c of the side plate 50.50'.

It is opened at 50'c.

Also, 58.58' is the intermediate piece 50b of the side plate 50.50'.
, 50'b have the guide grooves 57 and 57' on the inner surface of the front end.
The guide groove 58, 58' is a guide groove formed to extend in the vertical direction and has approximately the same structure as the guide groove 58, 58'.
The lower ends of the lower pieces 50c and 50'c are also opened.

Incidentally, the above-described guide grooves 57, 57' and 58, 58' are slidably engaged with engaging portions, which will be described later, formed on the cassette carrier 7, so that the cassette carrier 7
is supported by the sliding body 5 so that it can move freely in the vertical direction.

59.59' is a rotating shaft having a length of approximately one third of the side plate 50.50', and pinion gears 60.60, 60', and 60' are fixed to both ends of the rotating shaft 59.59'. The rotation @th59.59' is the front one of the pinion gears 60°60, 60', and 60'.
0.60' is located at a position of the lower end of the inner surface of the side plate 50.50' that corresponds to a position slightly rearward from the front guide groove 58.58'.
It is rotatably supported by bearing portions 61, 61, .

The pinion gears 60, 60 and 60', 60' are positioned so that a portion of their outer peripheral surfaces slightly protrude from the inner ends of the side plates 50, 50'.

(d-3, cassette carrier) [Figures 1 to 4, and 6] The cassette carrier 7 is located on both the left and right sides of the cassette placement board 12 on which the tape cassette 13 is placed and the cassette IT board 12. It consists of two side plates 8, 8' and a lid holder for opening and closing the front lid 62 of the tape cassette 13.

(d-3-a, cassette mounting plate) [Figures 2 to 4,
[FIG. 6] The cassette mounting plate 12 is formed into a substantially rectangular plate shape that is long in the left-right direction when viewed as a whole, and its size is as clearly understood from FIG. The outer shape is approximately the same as that of the cassette case 34 of the tape cassette 13.

A notch [3] is formed in a portion of the cassette mounting plate 12 other than both left and right ends near the rear end, and positioning pieces 64. 64' is formed, and the left and right corners of the front end are cut out in an abbreviated letter shape, and the front end is bent diagonally upward from the front end between the L-shaped cutouts. A bent piece 65 is formed, and two reel stand insertion holes 66 are formed in a portion between the notch 63 provided at the rear end and the front end, and are spaced apart from each other in the left-right direction.
66' is formed.

Reference numeral 67.67' denotes a side piece that stands upward from a position near the rear end of the left and right edges of the cassette mounting plate 12, and a side piece 67.67' stands up upward from a position near the rear end of the left and right side edges of the cassette mounting plate 12. Lid lifting support pins 68, 68' are provided which protrude substantially horizontally. Reference numeral 69 (see FIG. 3) is a stopper that protrudes toward the right side from a position on the rear side of the side piece 67' on the right side edge of the cassette mounting plate 12. This is to hold it in place.

(d-3-b, side plates) [Figures 1 to 3, and 6] The left and right side plates 8.8' of the cassette carrier 7 are
It has a length approximately 1.5 times the length of the placing plate 12 in the front-rear direction, and its width is equal to that of the left and right side plates 5 of the sliding body 5.
The width is approximately equal to the width between the opposing surfaces of 0.50', and a recessed portion 70.70' is formed in approximately one third of the upper surface near the front end.

Reference numeral 71.71' denotes a decorative part that has a substantially horizontally tilted shape when viewed from the side, and the decorative part 71.71' is a portion of the inner surface of the side plate 8.8' that corresponds to the recessed part 70.70'. It is formed to protrude inward from the

In the cassette mounting plate 12, mounting pieces (not shown) projecting upward from the front portions of both left and right edges are inserted from below into groove-like portions (not shown) formed in the decorative portions 71, 71'. The decorative portion 71.8 is fixed to the side plate 8.8' by screwing into the mounting piece a screw inserted through a screw insertion hole formed in the side plate 8.8'.
The inner surface of 71' is the side piece 67.67 of the cassette mounting plate 12.
' is located on approximately the same plane.

72.72' is an engagement pin projecting outward from the upper end of the front end of the side plate 8.8' substantially horizontally, and 73.7
Reference numeral 3' denotes an engagement piece that extends along the vertical direction on the outside of the rear end portion of the side plate 8.8' and is formed in a substantially oval shape when viewed from above.

Reference numeral 74.74' denotes a guided bin that projects outward from the upper end of the rear end of the side plate 8.8' substantially horizontally.

Further, 75.76, 75', 76' are guide racks formed to extend vertically on the outer surface of the side plate 8.8', and the guide racks 75.76, 75', 76'
Among the recesses 70 and 75', those located on the front side 75 and 75' are formed on the front side of the recess 70 and 70', and those located on the rear side 7
6.76' is formed on the front side of the engagement piece 73.73'.

(d-3-c, rack) [Fig. 1, Fig. 6] Also, as mentioned above, the left and right side plates 8.8' of the cassette carrier
has a rack 9.9' extending continuously on its bottom and front end surface.
are formed, and among these racks 9 and 9', the side plate 8
．． 9a, 9'a formed on the bottom surface of the side plate 8' (hereinafter referred to as the "horizontal portion") and a portion formed on the front end surface of the side plate 8.8' (hereinafter referred to as the "vertical portion"). Parts where 9b and 9'b are continuous (hereinafter referred to as "continuous part") 9c and 9'
c is formed to extend in a substantially arc shape.

A toothless portion 78 is formed by removing two teeth from a portion of the horizontal portion 9'a of the rack 9' formed on the left side plate 8' near the continuous portion 9'c.

(d-3-d, il origin) [Figures 2 to 4, 6
[Figure] The lid 8 is a lid holder for rotating the front surface M62 of the tape cassette 13, and the lid holder 78 has a main portion 78a formed in a plate shape long in the left and right direction, and a left and right side of the main portion 8a. The side pieces 78b, 78b protrude forward from both ends at a substantially right angle, forming a substantially U-shape, and the front ends of the left and right side pieces 8b, 8b are connected to the cassette mounting plate 12. The lid raising support bin 68 is provided protrudingly from the side pieces 67 and 67'.
．． 68' is rotatably supported.

One arm of a torsion spring 79 (shown only in FIG. 3) fitted onto the right side lid lifting support pin 68' is engaged with the right side piece 78b of the lid lifting flap 8. As a result, a rotational force is applied to the cover holder 78 in the counterclockwise direction in FIG. is brought into contact with the stopper 69 formed on the cassette mounting plate 12 from above, so that its main portion 78
a is held in a substantially vertical position (hereinafter referred to as the "non-raised position"), and in this state, the main portion 78a approaches the positioning pieces 64 and 64' of the cassette mounting plate 12 from behind. is located.

A push-up piece 80 (see FIG. 3) that slightly protrudes to the right is formed at the lower end of the left side piece 78b, and when the tape cassette 13 is placed on the cassette placement plate 12 The lower edge of the left side of the front cover 62 is located on this push-up piece 80.

Further, the lower end surface of the main portion 78a is formed into a so-called chamfered slope, as can be seen clearly in FIG.

(d-3-e, Supporting the cassette carrier) [Figs. 1 to 3, 5, 6] Therefore, the cassette carrier 7 formed in one piece in this way has the sliding body 5 and the feed gear 11. .11' is supported as follows.

That is, the cassette carrier 17 has its engagement pins 72,72
' are slidably engaged with the front guide grooves 58, 58' formed in the side plates 50, 50' of the sliding body 5, and the engaging pieces 73, 73' are engaged with the front guide grooves 58, 58' formed in the side plates 50, 50' of the sliding body 5, Side plate 5
It is slidably engaged with rear guide grooves 57 and 57' formed at 0 and 50', and is supported by the sliding body 5 so as to be movable in the vertical direction.

When the cassette carrier 7 is supported by the sliding body 5 in this manner, the guide racks 75, 76, 75', and 76' formed on the side plates 8, 8' of the cassette carrier 7 are rotatably supported by the sliding body 5. The pinion gears 60, 60
and 60', 60'. Therefore,
The cassette carrier 7 has two pinion gears 60.6 at both front and rear ends of its side plate 8.8' which are rotated in synchronization with each other.
0, 60', and 60', the height of the cassette carrier 7 is always maintained at the same level, so that the attitude of the cassette carrier 7 is always maintained horizontally.

Further, the position of the cassette carrier 7 at the upper end of its movement stroke in the vertical direction (hereinafter referred to as the "floating position").

), the top surface of the side plate 8.8' is aligned with the top surface of the side plate 50.50' of the sliding body 5, and the bottom plate of the side plate 8.8' is also aligned with the bottom surface of the side plate 50.50'. The decorative portion 71.71' formed on the side plate 8.8' is located at approximately the same height as the inverted trapezoidal recess 53.53' formed on the side plate 50.50' of the sliding body 5. It will be located in line with. .

Furthermore, the rack 9.9' of the cassette carrier 7 is meshed with a feed gear 11.11' supported on the support 6 side, as can be seen clearly in FIG.

(d-4, B-order of cassette carrier and sliding body) Thus, the cassette carrier 7'EL and the sliding body 5 are moved as follows.

(d-4-a, 6th shift in the loading direction) From the state where the sliding body 5 is in the pull-out position, that is, the state where the cassette carrier 7 is in the eject position, the feed gear 11.11
When ' is rotated in the counterclockwise direction, the horizontal part 9a of the rack 9.9'.

9''a is sent rearward, so the cassette carrier 7 is held in its floating position and is moved backward 8wJ, and the sliding body 5 is also moved rearward together with it.

When the slider 5 reaches a position slightly before reaching its retracted position, the continuous portions 9c, 9'c of the rack 9.9' of the cassette carrier 7 are engaged with the feed gear 11.11', and at this point Then move the cassette carrier 7 to the rear!
The amount of Il is gradually decreased, and the amount of downward movement is gradually increased.

From this point on, the guided pins 74 and 74' provided at the rear end of the cassette carrier 7 are aligned with the front edges 27a and 27 of the guide pieces 27 and 27' formed on the upper chassis 17, which form a substantially inverted shape. 'a and the front edges 27 a, 27'
The moving direction of the cassette carrier 7 is guided so that the movement of the cassette carrier 7 is carried out along an approximately inverted eight-shift locus.

At the same time, when the sliding body 5 is pulled in to a position slightly before reaching its retracted position, the rear end surface of the insertion portion 54 of the left side plate 50 is connected to the coil spring 25 fitted around the left guide shaft 24. , and begins to compress it, the repulsive force of the coil spring 25, that is, the forward pressing force is applied to the sliding body 5, and this pressing force is also applied to the cassette carrier 7, so that Rack 9
．． 9' is made to be pressed against the feed gear 11.11', so that the continuous part 9C19 of the rack 9.9'
'c, the vertical portions 9b, 9'b and the feed gears 11, 11' are reliably engaged with each other.

Then, at approximately the same time as the sliding body 5 reaches its retracted position, the rack 9.9' of the cassette carrier 7 begins to engage its vertical portions 9b, 9'b with the feed gear 11.11'.
From this state, the cassette mounting plate 7 is moved exclusively downward.

Note that as the cassette carrier 7 moves downward, guide racks 75, 76, 75 formed on the side plates 8.8'
', 76' are pinion gears 60.
60, 60', and 60' are all rotated synchronously while being moved downward.

As shown by the thin two-dot chain line in FIG. When the cassette carrier 7 descends until it is positioned at approximately the same height as the upper end surface of the cassette carrier 33', a stopper (not shown) prevents the cassette carrier 7 from moving further downward, thereby allowing the cassette carrier 7 to reach the loading completion position. .

In this state, the rack 9 of the cassette carrier 7
．． 9' has its vertical parts 9b, 9' as shown in FIG.
The upper end of b is meshed with the feed gear 11.11', and
The upper ends of the guide racks 75, 76, 75', 76' are engaged with pinion gears 60, 60, 60', 60'.

When the cassette carrier 7 reaches the loading completion position, the cassette carrier 7 is prevented from moving upward by a locking means (not shown) provided on the mechanical chassis 29.

(d-4-b, movement in the unloading direction! IIJJ
) Also, when the cassette carrier 7 is at the loading completion position, the locking means for the cassette carrier 7 is released, and the feed gear 11.11 is released.
When ' is rotated clockwise, the vertical parts 9b and 9'b of the racks 9 and 9' of the cassette carrier 7 are sent upward, so that the cassette carrier 7 is pushed towards the floating position, and the cassette carrier 7 is moved a little towards the floating position. When it rises to the front position, the continuous parts 9c and 9'c of the rack 9.9' are connected to the feed gear 11.1.
1', the amount of upward sliding is gradually reduced and the amount of forward movement is gradually increased. Therefore, from this point on, the cassette carrier 7 begins to press the sliding body 5 forward, and the sliding body 5 begins to be moved forward from its retracted position.

Then, the cassette carrier 7 reaches the floating position when the horizontal parts 9a, 9'a of the rack 9.9' begin to mesh with the feed gear 11.11', and is now moved exclusively forward. When the sliding body 5 reaches the pull-out position, 51tl moves forward.
This prevents the cassette carrier 7 from reaching the eject position.

In this state, the rack 9 of the cassette carrier 7
．． 9', the horizontal part 9a, the rear end of 9'a is the feed gear 1
1.11' and also the guide racks 75.76.
75', 76' have pinion gears 60, 60 at their lower ends.
, ao', and 60'.

(d-5. Tape cassette loading and unloading operations) The tape cassette loading and unloading operations by the tape cassette loading mechanism 37 configured as described above are performed as follows.

(d-5-a, loading operation) First, the loading operation will be explained.

When the loading operation is started with the tape cassette 13 placed on the cassette mounting plate 12, the sliding body 5 is moved backward, and the tape cassette 13 can be rotated freely on both left and right sides of the cassette carrier 7. The left and right sides of the cassette case 34 are held from above by the cassette holders 81 and 81' supported by the cassette holders 81 and 81'. When the sliding body 5 reaches a position slightly before reaching the retracted position, the lid lifter 8 provided on the cassette carrier 7 is provided on the mechanical chassis 29, as shown by the thick two-dot chain line in FIG. By riding on the lid holder rotating bin 35, the lid holder 78 is rotated in a slightly clockwise direction, whereby the push-up piece 80 formed on the lid holder 78 is pushed up against the front surface i6 of the tape cassette 13.
2 is pushed upward, the front surface M62 begins to be rotated from the closed position where the tape pull-out surface 34a of the cassette case 34 is closed to the open position where the tape pull-out surface 34a is opened.

Then, from this state, the sliding body 5 moves to its retracted position, and the cassette carrier 7 moves downward, and almost at the same time as the cassette carrier 7 reaches the loading completion position, the cassette of the tape cassette 13 The case 34 is placed on the upper end surface of the cassette positioning pins 32, 32' and 33, 33' that are set upright from the mechanical chassis 29, and the rear Cassette positioning pin 32
．． The insertion section 32a132'a formed in the tape cassette 13 is inserted into the recording/reproducing section 2 of the tape cassette 13.
8 is positioned horizontally and vertically.

Thus, the tape cassette 13 is installed in the recording/reproducing section 28, and in this state, the lid holder 78 is at a position rotated approximately 90' clockwise, so that the front lid of the tape cassette 13 is 62 reaches the open position, and as a result, the tape draw-out surface 34a of the cassette case 34 is opened in a state facing the head drum 30, and the engagement of a tape reel (not shown) stored in the cassette case 34 is released. The reel engaging shafts 31a, 31'a of the reel stands 31, 31' are relatively inserted into the matching holes.

(d-5-b, Unloading Operation) Next, the unloading operation will be explained.

When the unloading operation starts with the cassette carrier 7 at the loading completion position, the cassette carrier 7 is first moved to the floating position and then moved forward while pressing the sliding body 5. The sliding body 5 is moved 8wJ to the pull-out position, and the cassette carrier 7 is moved 8wJ to the eject position.

Then, while the cassette carrier 7 is moved to the floating position, the front surface M62 of the tape cassette 13 is returned from the open position to the closed position, and while the cassette carrier 7 is being moved forward eight times, the cassette presser 81 The holding of the tape cassette 13 by .81' is released.

(G. Effects of the Invention) As is clear from the above description, the recording medium loading mechanism of the present invention includes a sliding body supported by a support so as to be movable in the horizontal direction, and a sliding body that moves vertically 8 times vertically. I! 11
A rack formed to extend in an oval shape on the recording medium conveying member is fed by a pinion gear supported by a support, so that the pinion gear moves to the horizontal portion of the rack. When the pinion gear is engaged with the vertical portion of the rack, the sliding body is moved horizontally together with the recording medium conveyance member, and when the pinion gear is engaged with the vertical portion of the rack, only the recording medium conveyance member is moved in the vertical direction; The present invention is characterized in that an elastic means for urging the rack in one direction is provided.

Therefore, according to the recording medium loading mechanism of the present invention, the recording medium conveying member is supported movably in the vertical direction on the sliding body supported movably in the horizontal direction on the support body, and the recording medium conveying member is provided with an abbreviated shape. By forming an extending rack and sending this rack by a pinion gear supported on a support, the sliding body and the recording medium conveying member are moved together, even though there are two members that move relative to the support. The 4i structure can be simplified by requiring only one drive part, and by providing an elastic means that biases in one direction, the engagement between the rack and pinion gear can be maintained reliably, and the operation can be improved. You can also make sure.

[Brief explanation of drawings]

1 to 6 show an example of an implementation in which the recording medium loading mechanism of the present invention is applied to a tape cassette loading mechanism of a VTR, and FIG. 1 is a partially omitted side view;
Fig. 2 is a perspective view showing the entire VTR with the cassette carrier in the eject position, Fig. 3 is a plan view of the tape cassette loading mechanism, and Fig. 4 is a side view of the main parts showing the tape cassette loading operation. , FIG. 5 is an enlarged perspective view of the sliding body, FIG. 6 is an enlarged perspective view of the cassette carrier, and FIG. 7 is a schematic side view showing an example of a conventional tape cassette loading mechanism. Explanation of symbols 5...Sliding body, 6...Support, 7...Recording medium transport member, 9.9'...Rack, 9a, 9'a...Horizontal part of rack, 9b, 9'b... Vertical part of the rack, tt, tt'... Pinion gear, 25... Bombing means,

Claims (1)

[Scope of Claims] A sliding body supported by a support body so as to be movable in the horizontal direction, and a recording medium conveying member supported by the sliding body so as to be movable in the vertical direction, the recording medium conveying member having a substantially L-shape. By feeding a rack formed to extend in a shape by a pinion gear supported by a support, when the pinion gear is engaged with the horizontal portion of the rack, the sliding body is moved in the horizontal direction together with the recording medium conveying member. , when the pinion gear is engaged with the vertical portion of the rack, only the recording medium conveyance member is moved in the vertical direction, and further provided with an elastic means for biasing the rack in one direction. Recording medium loading mechanism