JPH01211353A - Cassette loader - Google Patents

Abstract

PURPOSE:To prevent a cassette mounting plate from descending even when the cassette mounting plate is pressed downward by mounting one part of the cassette mounting plate onto a mounting surface formed on a frame member when a cassette mounting space is protruded out of an outer case. CONSTITUTION:The cassette mounting space 120 is formed with the cassette mounting plate 57 for mounting a cassette and the frame member 93 for surrounding this plate, while the cassette mounting plate 57 is made capable of moving back and forth and up and down against the frame member 93. Then, when the cassette mounting space 120 is protruded out of the outer case, the mounting surface 103 for mounting the one part of the cassette mounting plate 57 is formed on the frame member, and when the cassette mounting plate is moved up and down, the one part of the cassette mounting plate 57 is positioned out of the mounting surface 103 of the frame member 93. Thus, since the one part of the cassette mounting plate 57 is supported by the mounting surface 103 provided on the frame member 93, the cassette mounting plate 57 cannot be descended.

Description

DETAILED DESCRIPTION OF THE INVENTION The cassette loading device of the present invention will be explained according to the following items.

A. Industrial field of application B9 Summary of the invention C0 Background art 9 Problems to be solved by the invention E6 Means for solving the problems F. Embodiment a Tape cassette [Figs. 12 to 16 ] b. PCM audio tape recorder [Figure 2] C. Cassette loading section [Figure 4] d. Cassette loading device [Figures 1 to 11] d-1. Chassis [Figure 4 d-2, Sliding body [Fig. 2, Fig. 3, Fig. 5, Fig. 6] d-3, Cassette mounting section [Fig. 1 to Fig. 3, Fig. 5, Fig. 6] d-4, Cassette mounting part holder support mechanism [Fig. 2, Fig. 3, Fig. 5, Fig. 6] d-5, cassette holder [Fig. 1 to 3, Fig. 5, Fig. 6] d-6, limiter - [Fig. 3, Fig. 5] d-7, Frame member [Fig. 1 to 3, Fig. 5 to 7] d-8, Drive part [Fig. 4 to 6, Fig. 9 Figures to Figures 11] d-9, Frame member locking mechanism [Figures 2, 3, 5 to 7] d-10, Lifting mechanism [Figures 3 to 6, Figure 8, Figure 9. Operation [Figure 1, Figure 5, Figure 6, Figure 11, Figure 16.
Figure e-1, tape cassette insertion e-2, loading operation e-2-a, retraction operation e-2-b, lowering operation e-3, unloading operation G3 Effects of the invention (A, industrial application) FIELD This invention relates to a novel cassette loading device. Specifically, in a cassette loading device that performs a loading operation in which a cassette containing a recording medium is pulled into an outer casing and then lowered to a cassette mounting section, a cassette mounting plate on which the cassette is placed protrudes outside the outer casing. This is a new design that prevents the cassette mounting plate from falling even if it is pressed downward, and from applying excessive force to the mechanism that supports the cassette mounting plate. The present invention aims to provide a cassette loading device.

(B. Summary of the Invention) The cassette loading device of the present invention forms a cassette mounting space by a cassette mounting plate on which a cassette is placed and a frame member surrounding the cassette mounting plate, and the cassette mounting plate is placed against the frame member. Formed so as to be movable in the front-rear direction and up-down direction,
When the cassette mounting space protrudes outside the outer casing, a part of the cassette mounting plate is placed on the mounting surface formed on the frame member,
When the cassette is completely drawn into the outer casing, the part of the cassette mounting plate moves to a position away from the cassette mounting surface, thereby increasing the cassette mounting space outside the outer casing. Even if the cassette mounting plate is pressed downward while the cassette mounting plate is protruding from the frame member, a part of the cassette mounting plate is supported by the mounting surface provided on the frame member and is prevented from moving downward. This prevents inconvenient situations such as damage to the cassette mounting plate, other members, or mechanisms due to the mounting plate being lowered at a time other than the predetermined timing.

(C. Background Art) There are various cassette loading methods for recording and reproducing apparatuses that use tape cassettes, such as video tape recorders and PCM audio tape recorders, and one of them is the so-called linear skating method.

This linear skating method involves inserting a tape cassette into the cassette mounting space with the cassette mounting space protruding into the outer casing of the recording/reproducing device, then pulling the cassette mounting space into the outer casing. During or after the retracting operation is completed, the tape cassette is lowered and installed in the cassette mounting section.

(D. Problem to be Solved by the Invention) By the way, in the above-mentioned linear skate type cassette loading device, the tape cassette is placed and moved between the protruding position and the retracted position, and the tape cassette is moved between the protruding position and the retracted position. A cassette mounting plate is required that can be moved up and down between the cassette mounting section and the cassette mounting section.

Then, the above-mentioned cassette mounting plate is protruded from the outer casing and retracted into the outer casing according to a predetermined timetable, and
The operation of lowering from the retracted position to the cassette mounting part and the operation in reverse order must be performed.

However, when the cassette mounting plate protrudes outside the outer casing, it can be pressed downward.
It may happen that this is pushed downwards, either accidentally or intentionally.

In such a case, if the cassette mounting plate falls below the predetermined position due to the above pressure, it may not be possible to pull it in, or it may be pulled in forcibly, causing the cassette mounting plate to move There is a habit of colliding with a member and damaging the cassette mounting plate or other members.

(E. Means for Solving the Problems) In order to solve the above-mentioned problems, the cassette loading device of the present invention has a cassette loading plate on which the cassettes are placed and a frame member surrounding the four sides of the cassette loading plate. A mounting space is formed, and the cassette mounting plate is movable in the front-rear direction and vertical direction with respect to the frame member, and a part of the cassette mounting plate is placed on the cassette mounting space when the cassette mounting space protrudes outside the outer casing. The mounting surface is formed on the frame member, and when the cassette mounting plate moves in the vertical direction, a part of the cassette mounting plate is located away from the mounting surface of the frame member.

Therefore, according to the cassette loading device of the present invention, even if the cassette placement plate is pressed downward when the cassette placement space protrudes outside the outer casing, the cassette placement plate is Because a portion of the cassette mounting plate is supported by the mounting surface provided on the frame member, the cassette mounting plate does not fall down, which could occur if the cassette mounting plate were to fall at other times. Various problems such as damage to the placing plate and other members can be prevented from occurring.

(F. Embodiment) The details of the cassette loading device of the present invention will be described below according to the embodiment shown in the accompanying drawings.

In this embodiment, the cassette loading device of the present invention is
This is applied to a cassette loading device for a commercial audio tape recorder.

First, before entering into a description of the cassette loading device, a tape cassette that is removably attached to the cassette loading device will first be described.

(a, tape cassette) [Figures 12 to 16] 1 is a tape cassette for PCM audio.

Reference numeral 2 denotes a cassette case, which is made up of an upper half 3 and a lower half 4 made of synthetic resin and connected by screws or the like.

Inside the cassette case 2, a pair of reel hubs 6.7 around which the magnetic tape 5 is wound are rotatably housed. In addition, 8
is a transparent window plate provided in the upper half 3 through which the reel hub 6.7 can be seen.

A front cover 9 is rotatably attached to the front end of the cassette case 2, and is used to open and close the front end surface of the cassette case 2.

A shutter 10 is slidably provided on the bottom surface of the cassette case 2, and is used to open and close the bottom surface of the cassette case 2. The shutter 10 is constructed by integrally forming a bottom plate part 11 and short side plate parts 12.12 upwardly raised from the right and left side edges of the bottom plate part 11 using synthetic resin. 13.13,... is shutter 10
The guide protrusions 13.13, . The shutter 10 is slidably fitted to the cassette case 2 by being slidably engaged with a guide groove 14.14 formed so as to extend in the front-rear direction between the two.

Reference numeral 15.15 denotes a projecting piece that is provided on the front edge of the shutter 10 to project upward from a position appropriately spaced from side to side.

Reference numeral 16 denotes a space for inserting a guide member, etc., formed behind the magnetic tape 5 stretched along the front opening of the cassette case 2; A recess 18 extending in the vertical direction is formed.

Reference numeral 19 denotes a column erected approximately at the center in the left-right direction of the front edge of the shutter 10, and 20 denotes an engagement portion formed at a position close to the column 19.

Reference numeral 21 designates a torsion spring, the coil portion 21a of which is fitted onto the support column 19, one short arm 21b is engaged with the engaging portion 20, and the tip of the other long arm 21c is connected to the guide member. The shutter 10 comes into elastic contact with the inner surface 17 of the insertion space 16, and the elastic force of the torsion spring 21 urges the shutter 10 to move in the direction of closing the space 16, that is, forward.

Further, the bottom plate portion 11 of the shutter 10 has two insertion holes 2.
2.22 is formed in the bottom plate of the lower half 4, and when the shutter 10 is retracted, the insertion hole 22.22 becomes the insertion hole 23.22 formed in the bottom plate of the lower half 4, as shown by the two-dot chain line in FIG. 23 (hereinafter, the position of the shutter 10 in this state will be referred to as the "open position"), and the reel drive engagement shaft provided in the PCM audio tape recorder can enter into the cassette case 2. It looks like this. Incidentally, at this time, the support column 19 enters into the recess 18. Then, the shutter 10 moves forward, and as shown in FIG.
0 closes the lower part of the space 16 of the cassette case 2, the insertion holes 22.22 of the shutter 10 and the insertion holes 23.23 of the lower half 4 are displaced from each other, and the insertion holes of the lower half 4 23. 23 is the bottom plate part 11 of the shutter 10
(Hereinafter, the position of the shutter 10 in this state will be referred to as the "closed position").

Furthermore, shallow grooves 24.24 are formed on the lower surface of the bottom plate part 11 of the shutter 10, and extend in the front-rear direction and open at the front edge of the bottom plate part 11, and the opening ends of the shallow grooves 24.24 gradually widen. It is designed to be opened. When the front cover 9 is closed, the opening end of the shallow groove 24.24 corresponds to a notch 25.25 formed in the lower edge of the front cover 9. Furthermore, two notches 26 and 26 are formed in the lower edge of the front cover 9.

A square engagement hole 27.2 is provided at the front end of the shallow groove 24.24.
7 is formed, and a rectangular engagement hole 28.28 is formed at the rear end of the shallow groove 24.24.

Reference numeral 29.29 is a lock piece, which extends in the front-rear direction so that its rear end is connected to the bottom plate of the lower half 4 by forming a 0-shaped groove 30.30 on the bottom plate of the lower half 4, and its front end is flexible. It is formed by Also, on the lower surface of the front end of the lock piece 29, there is an engaging protrusion 3 that is shaped like an inverted triangle when viewed from the side.
1.31 are integrally formed. And lock piece 2
The wall thickness of the lock piece 29.29 is made thinner than other parts of the lower half 4Φ bottom plate to make it easier to bend.
A limiter 32, 32 is provided at a predetermined height above the front end of the lock piece 29 so as to protrude from the upper half 3, so as to prevent the lock piece 29, 29 from being bent more than necessary and breaking, as shown in FIG. 16(B). It is made sure that nothing happens.

As shown in FIG. 13, when the shutter 10 is closed, the engagement hole 28 provided in the shutter 10
．． Lock piece 29 at 28. Engagement protrusion 31.31 at the tip of 29
are fitted, and the shutter 10 is locked to prevent it from moving toward the open position. In this state, the engagement protrusion 31.31 projects downward from the engagement hole 28.28, but is located within the shallow groove 24.24.

(b, PCM audio tape recorder) [FIG. 2] Reference numeral 33 is a PCM audio tape recorder equipped with a cassette loading device, etc., which will be described later. 34 is an outer casing of the recorder 33, and a front plate 34a thereof has a drawer opening 35 for drawing out a cassette holder.

(c, Cassette Mounting Portion) [FIG. 4 36 is a lower chassis disposed within the outer casing 34, and is located at a height corresponding to the lower side of the outlet 35.

Reference numeral 37 denotes an opening for arranging a reel drive shaft formed at the front end of the lower chassis 36, and the opening 37 is formed in an oval shape that is elongated in the left-right direction.

Reference numerals 38 and 39 indicate reel drive shafts supported by a reel base board (not shown) provided below the opening 37, and the upper ends of these reel drive shafts 38 and 39 are provided with engagement shaft portions 38.
a, 39a, and the engaging shaft portions 38a, 3
9a is positioned so as to protrude upward from the lower chassis 36 through the opening 37.

40 is a head drum provided at the rear end of the lower chassis 36.

Although not shown in the drawings, the lower chassis 36 is provided with mechanisms such as a tape running mechanism and a tape loading mechanism, which constitute a magnetic tape drive section or a cassette mounting section, which is a recording medium. When the tape cassette 1 described above is loaded by the cassette loading device described later and installed in a predetermined position on the lower chassis 36, the magnetic tape 5 is pulled out from the cassette case 2 by the tape loading mechanism, and the tape traveling mechanism described above is pulled out. It is adapted to be wound around the various tape guide members, the head drum 40, and the like.

(d, cassette loading device) [Figures 1 to 11
Figure ] 41 is a cassette loading device to which the present invention is applied.

(d-1, Chassis) [FIG. 4] Reference numeral 42 denotes an upper chassis, which is fixed slightly above the lower chassis 36 within the outer casing 34.

The upper chassis 42 has a rectangular shape that is long in the front and rear direction.
Rear side (For the tape recorder 33, the side where the outlet 35 is located is referred to as the front side, and regarding the tape cassette 1, the side where the front surface M9 is located is referred to as the front side.) A large opening leaving approximately one-third of the area. A portion 43 is formed.

A guide pipe 44 is supported above the right edge of the upper chassis 42 so as to extend in the front-rear direction.

45 is a guide plotter that is erected on the left side edge of the upper chassis 42 at approximately the center in the front-rear direction;
The guide block 45 is made of a synthetic resin with good flexibility, such as nylon resin, and has a guide groove 46 extending in the front-rear direction and opening toward the guide pipe 44 at its upper end. There is.

Reference numeral 47.47 denotes a rear support wall extending in the front-rear direction, which is erected at a position closer to the stacking platform side than both left and right edges in the rear part of the upper surface of the upper chassis 42. A guide slit 48.4B extending in the front-rear direction is formed. Note that these guide slits 48, 48 are formed at the same position in the height direction.

Reference numeral 49.49 denotes a front support wall that stands up from the front half of the left and right opening edges of the opening 43 of the upper chassis 42, and the support wall 49.49 also has guide slits 50, 50 extending in the front-rear direction. is formed. Note that these guide slits 50, 50 are formed at the same position in the height direction.

(d-2, Sliding body) [FIGS. 2, 3, 5, 6] 51 is a sliding body, which is formed into a frame shape that is long in the front and back direction when viewed from above.

Reference numeral 52.52 denotes a support shaft that protrudes laterally from a position near the rear end of the sliding body 51, and a roller 53 is attached to the support shaft 52.52.
．． 53 is rotatably supported, and the rollers 53.53
The guide slit 48 of the rear support wall 47 and 47 described above
．． 48 so as to be freely transferable.

Reference numerals 54 and 54 designate slightly elongated support shafts that project laterally from the lower end of support pieces 55 and 55 that project substantially downward from both sides of the front end of the sliding body 51; .54
Rollers 56.56 are rotatably supported at the tip of the front support wall 49.56.
The guide slits 50 and 50 of 49 are engaged in a movable manner.

As described above, the sliding body 51 is supported by the upper chassis 42 so as to be slidable in the front and rear directions. The limit of forward movement of the sliding body 51 is defined by the roller 53 on the rear left side hitting the front end of the guide slit 48 of the support wall 47 on the rear left side, and the limit of the backward movement of the sliding body 51 is defined by the front right roller 56 hitting the rear end of the guide slit 50 of the front right support wall 49.

(d-3, cassette loading section) [Figures 1 to 3, 5
FIG. 6] Reference numeral 57 denotes a cassette mounting plate, which serves as a cassette mounting section.

The cassette mounting plate 57 has a generally horizontally elongated rectangular plate shape when viewed from above, and circular insertion holes 58, 58 are formed at left and right intervals in the rear portion thereof.

Reference numeral 59.59 denotes a protrusion extending in the front-rear direction at a position immediately behind the insertion hole 58.58 and approximately corresponding to the outside of the insertion hole 58.58, and the front end portions 59a, 59
a and the rear end portions 59b, 59b are inclined surfaces.

A notch 6 is formed on the rear edge of the cassette mounting plate 57, leaving both sides.
0 is formed, and projecting pieces 61 and 61 are provided upwardly on the rear edge of the notch 60 near both ends thereof.

Reference numeral 62 denotes a notch groove extending rearward from the center in the left-right direction of the front edge of the cassette mounting plate 57 and reaching a length of a little over one-third of the depth.

β3.63 is an engagement piece protruding sideward from the front end of the cassette mounting plate 5, and these engagement pieces 63.63
Engagement holes 64, 64 are formed in. These engaging pieces 63, 63 become part of a cassette placed on the mounting surface of a frame member, which will be described later.

Reference numerals 65 and 65 indicate supported pieces raised upward from positions near the rear end of both side edges of the cassette mounting plate 57.

(d-4, cassette loading section support mechanism) [Fig. 2, Fig. 3, Fig. 5, Fig. 6] 66 is a first support arm that is approximately U-shaped when viewed from above, and is Two arm pieces 67, 67' extending from the front and an intermediate piece 68 connecting the rear ends of these arm pieces 67, 67' are integrally formed.

69.69 is the support piece 5 provided at the front end of the sliding body 51
5.55 is a support shaft that protrudes inward from a position near the upper end.

And arm piece 67.6 of the first support arm 66
7' has a portion near the rear end rotatably supported by the base of the support shaft 69.69, and the arm piece 67.7'.
The front end of 67' is rotatably connected to the upper end of supported piece 65, 65 provided at the rear end of cassette mounting plate 57.

Reference numeral 70 denotes a spring folded piece that protrudes laterally from a substantially middle portion of the left arm piece 67 that can be extended in the front-rear direction. A tension spring 72 is stretched between the provided spring folded piece 71.

Reference numeral 73.73 is a second support arm, which has a substantially upside-down shape when viewed from the side. These second support arms 73.
The rear end portion of 73 is rotatably supported by a portion near the base of a lower support shaft 54.54 provided on the support piece 55.55 of the sliding body 51, and the rear end portion of the portion bent downward from the front portion is The lower end is a support shaft 74.74 that protrudes laterally from a portion near the lower end of the supported piece 65.65 of the cassette mounting plate 57.
It is rotatably supported.

As described above, the cassette mounting plate 57 can be moved vertically while maintaining a horizontal posture according to the rotation of the first support arm 66 and the second support arm 73.73. It is supported by the front end of the sliding body 51.

(d-5, cassette holder) [Figs. 1 to 3, section 5, fig. 6] Reference numeral 75 is a cassette holder, which includes two arm pieces 76 and 76' extending in the front-back direction, and these arm pieces 76. A connecting piece 77 connecting the rear ends of 76' is integrally formed to form a substantially U-shape when viewed from above.

A portion of the arm piece 76, 76' near the rear end is rotatably supported by the tip of the support shaft 69, 69.

A support shaft 78.78 projecting outward is provided at the front end of the arm piece 76.76'.
Presser rollers 79 and 79 are rotatably supported by 78.

Reference numeral 80 denotes an actuated piece that projects rearward from the rear end of the left arm piece 76, and an actuated bottle 81 is provided at the rear end of the actuated piece 80 to protrude outward. .

Reference numeral 82 denotes a spring folded piece that projects outward from the lower edge of a portion near the rear end of the actuated piece 80, and extends from the front edge of a portion near the left side of the intermediate piece 68 of the first support arm 66. A tension spring 84 is tensioned between the spring folded piece 83 and the spring folded piece 82 that protrudes downward. Then, due to the tensile force of the tension spring 84, the front ends of the two arm pieces 76 and 76' of the cassette presser 750 tend to move downward relative to the front ends of the arm pieces 67 and 67' of the first support arm 66. A biasing force is given.

(d-6, limiter part) [FIGS. 3 and 5] 85 is a limiter part provided at the front part of the sliding body 51.

Reference numeral 86 denotes a support plate that protrudes rearward from the front end of the sliding body 51, and has a square hole 87 formed approximately in the center of the portion near the rear end. An arm 88 is provided to protrude toward the rear end of the arm 88, and the rear end of the arm 88 is bent downward to form a spring folded piece 88a.

Reference numeral 89 denotes a suppressed arm, which is made of a synthetic resin with good sliding properties such as nylon resin.

The base end of the pressed arm 89 is rotatably supported on the lower surface of the left end of the rear edge of the support plate 86 . A pressed portion 90 that protrudes rearward in an arc shape is integrally formed at the tip of the pressed arm 89, and a regulation bottle 91 that protrudes upward is integrally formed. A regulating pin 91 is inserted into the hole 87 formed in the support plate 86. Thus, the pressed arm 89 can rotate within the range between the position where the regulating pin 91 abuts the front edge of the hole 87 and the position where it abuts the rear edge.

Reference numeral 92 denotes a tension spring, which is tensioned between the tip of the pressed arm 89 and the spring folded piece 88a provided on the support plate 86, and the tensile force of this tension spring 92 causes the pressed arm 89 to move. The regulating pin 91 is the support plate 8
In this state, most of the pressed portion 90 protrudes rearward from the rear edge of the support plate 86 when viewed from above.

(d-7, frame shoulder) [Figs. 1 to 3, Figs. 5 to 7] 93 is a frame member made of synthetic resin.

The frame member 93 has a rectangular shape that is long in the front-rear direction when viewed from above, and a rectangular hole 94 into which the tape cassette 1 is inserted is formed at the front end.

Notches 96.96 are formed at the upper edges of the front one-third of the side walls 95.95' of the frame member 93 located on both sides of the hole 94. Further, eaves pieces 97.97 are formed between both sides of the hole 94 and the upper edge of the side wall 95.95'. Furthermore, a notch 95a is provided at a portion of the lower edge of the side wall 95, 95' that includes a position corresponding to the rear portion of the hole 94.
, 95'a are formed.

Reference numeral 98.98 denotes a protrusion that protrudes downward from a portion of the eaves piece 97 that corresponds to approximately the middle of the rear oblique edge of the notch 96.96, and its inner edges 98a, 98a allow the tape cassette 1 to be It limits movement to the left and right, and the inside 149
The distance between 8a and 98a is approximately the same as the width of the cassette case 2 of the tape cassette 1.

Reference numeral 99 denotes a rear side plate that projects downward from the rear edge of the hole 94 excluding both left and right ends;
The limit of rearward movement of the tape cassette 1 within the cassette mounting section is defined by .

Reference numeral 100 denotes a protrusion extending downward from approximately the center of the front edge of the hole 94, and this protrusion 100 defines the limit of forward movement of the tape cassette 1 within the cassette mounting section.

Reference numeral 101.101 denotes a guide piece protruding from the inner surface of a portion near the front end of the side wall 95.95', the rear end of which is connected to the protrusion 9.
8.98 on the cargo side, the front end ending well short of the front wall 102, with spaces 102a, 102 between them.
a is formed. And this guide piece 101.10
1 is the part of the cassette mounting plate 57 (the engaging piece 63
．． 63) becomes the mounting surface on which it is placed.

The guide pieces 101 and '101 connect the rear end 103.103 close to the eaves piece 97.97 and the front end 104.104 close to the lower edge of the side wall 95.95', and connect these two parts. The upper surface of the front end portion 104.104 has an engaging protrusion 10.
6.106 is provided protrudingly.

Reference numeral 107 designates a rack portion protruding from a position near the right edge of the lower surface of the rear half of the frame member 93 so as to extend in the front-rear direction, and rack teeth 108, 108, . . . are arranged in the front-rear direction on the left side surface thereof. has been done.

Reference numeral 109 denotes a support shelf extending in the front-rear direction at a position approximately midway in the vertical direction of the outer surface of the rear half of the right side wall 95'. It is set up. An engagement notch 111 extending in the vertical direction is formed near the rear end of the protrusion 110.

A bearing member 112 is made of a synthetic resin with good sliding properties such as nylon resin, and is fixed to the upper surface of the support shelf 109. Support pieces 113 and 113 erected at both front and rear ends of the bearing member 112 have bearing holes 114.
114 are formed coaxially.

Reference numeral 115 denotes a guided protrusion extending in the front-rear direction, which is protruded from a portion of the outer surface of the left side wall 95 from a portion on the cargo side to the rear end than the center in the front-rear direction.

With the frame member 93 as described above covering the sliding body 51, the guide pipe 44 provided on the upper chassis 42 is slidably inserted into the two bearing holes 114, 114 of the bearing member 112, and the left side The guided protrusion 115 formed on the side wall 95 is slidably engaged with the guide groove 46 of the guide block 45 provided on the upper chassis 42, so that the frame member 93 is attached to the upper chassis 42 in the front-rear direction. Supported in a slidable manner.

The rearward movement range of the frame member 93 is limited to the bearing member 11.
The rear support piece 113 of the bearing member 112 comes into contact with the support piece 116 supporting the rear end of the guide pipe 44, so that the forward movement range is limited to the front support piece 1 of the bearing member 112.
Support piece 1 13 supports the front end of the guide pipe 44
17.

118 is a tension spring, and a spring hook hole 11 is formed at a position near the rear of the left edge of the frame member 93.
9 and the spring tree piece 71 of the sliding body 51. The tension spring 118 biases the sliding body 51 and the frame member 93 so that they are attracted to each other, and the sliding body 51 absorbs the force of moving relatively backward.
Further, the frame member 93 is biased by a moving force that tends to move relatively forward. Furthermore, this tension spring 118
The tension force of the tension spring 92 of the limiter part 85
The tensile force is set to be weaker than that of the And the sliding body 51
A portion near the base of the support shaft 54.54 protruding laterally from the front support piece 55.55 of the frame member 93 is formed at the lower edge of a portion near the front end of the side wall 95.95' of the frame member 93. By coming into contact with the rear edges of the notches 95a and 95'a, the limit of rearward movement of the sliding body 51 relative to the frame member 93 is defined.

Therefore, when the frame member 93 is moved rearward, the sliding body 51 connected to the frame member 93 via the tension spring 118 is also moved rearward, and the sliding body 51 reaches its rearward movement limit. From the point where it came and stopped, the frame member 93
can be further retracted, so that at the end of the retraction movement the sliding body 51 releases the tension spring 118.
By expanding □, the flap moves slightly forward relative to the frame member 93.

Then, the sliding body 51 and the frame member 93 are connected to the tension spring 1.
18, the engaging pieces 63 protrude from both sides of the front end of the cassette mounting plate 57.
．． 63 is located between the eaves piece 97.97 and the rear end portion 103.103 of the guide piece 101.101, and in this state, the cassette mounting plate 57 becomes the bottom plate and the protrusion 98.98 of the frame member 93
, a cassette mounting space 120 surrounded by the rear side plate 99 and the protrusion ioo is formed.

(d-8, drive unit) [Figs. 4 to 6, 9 to 11] 121 is rotatable on a support shaft 122 erected at a position slightly rearward from the center of the upper chassis 42. It is a cam gear supported by a cam gear, and consists of an upper gear 123 and a lower gear 124 that are stacked one on top of the other.

The upper gear 123 has a spur gear shape, and gear teeth 125, 125, . . . are formed on its outer peripheral surface. Upper gear 1
A shaft portion 126 is provided at the center of the support shaft 23 to protrude upward, and an insertion hole 127 is formed through the shaft portion 126 into which the support shaft 122 is inserted.

Reference numeral 128 denotes a guide slit formed in an arc shape centered on the insertion hole 127 at a position slightly closer to the center than the middle between the center and the outer circumference of the upper gear 123, and has a central angle of approximately 180°. Formed in a range.

Reference numeral 129 designates an insertion hole formed at a position close to the periphery of the guide slit 128 in the clockwise direction, and reference numeral 130 designates an engagement hole formed further outside of the insertion hole 129.
These insertion holes 129 and engagement holes 130 are arranged approximately in the radial direction.

Reference numeral 131 denotes a lock plate, which is made of flexible synthetic resin and has a long plate shape, and has a hole 132 formed at its base.
is externally fitted onto a shaft portion 126 erected at the center of the upper gear 123. 133 is a lock pin protruding from the lower surface of the tip of the lock plate 131; 134 is an actuated piece protruding downward from a position slightly closer to the base of the lock bin 133;
The actuated piece 134 is inserted into the insertion hole 129 through the lock bin 13.
3 are respectively inserted into the engagement holes 130 from above. Both the lock bin 133 and the actuated piece 134 protrude downward from the lower surface of the upper gear 123, but the amount of protrusion of the actuated piece 134 is larger.

A lower path half portion 135 of a portion of the actuated piece 134 projecting downward from the lower surface of the upper gear 123 has an inverted triangular shape when viewed in the radial direction of the upper gear 123.

Reference numeral 136 denotes a pressing spring made of plate eave material, one end of which is fixed to the upper surface of the upper gear 123, and the other end elastically contacted to the upper surface of the tip end of the lock plate 131.

Pins 137 and 137 project from the upper surface of the upper gear 123, are in contact with the side edges of the lock plate 131, and define their positions so that the lock plate 131 does not rotate.

The lower gear 124 has a flat gear shape having approximately the same diameter as the upper gear 123, and gear teeth 138, 138, . . . are formed on its outer peripheral surface. Gear teeth 138 of the lower gear 124
．． The formation pitch of gear teeth 138, . . . is smaller than the formation pitch of gear teeth 125, 125, . Further, a shaft portion 139 projects downward from the center thereof, and an insertion hole 140 is formed passing through the shaft portion 139 .

141 is a fitting hole formed near the outer periphery of the lower gear 124, and 142 is an engagement hole formed outside the fitting hole 141. These fitting holes 141 and 142 are formed side by side in the radial direction of the lower gear 124, and the respective distances from the center are such that the fitting hole 141 is the insertion hole 129 of the upper gear 123, and The engagement hole 142 is the same as the engagement hole 130 of the upper gear 123. Therefore, when the upper gear 123 and the lower gear 124 are overlapped so that their centers coincide with each other and one is rotated, the fitting hole 141 will coincide with the insertion hole 129 at a certain point, and the engagement hole 141 will coincide with the insertion hole 129 at a certain point. The matching hole 142 is arranged to match the engagement hole 130.

Reference numeral 143 designates a press bottle erected at a position approximately midway between the center and the outer periphery of the upper surface of the lower gear 142, and its distance from the center is the same as that of the guide slit 128 of the upper gear 123. Then, when the upper gear 123 and the lower gear 124 are overlapped, the pressing pin 143 of the lower gear 124 is inserted through the guide slit 128 of the upper gear 123 and projected upward.

Then, the upper gear 123 and the lower gear 124 are overlapped, and the pressing pin 143 is inserted into the guide slit 128 when viewed from above.
close to the clockwise end of the
The actuated piece 134 of the lock plate 131 is inserted into the insertion hole 129 and the fitting hole 141, the lock pin 133 is engaged with the engagement hole 130 and the engagement hole 142, and in this state, the upper gear 123 and the lower gear 124 are connected. is designed to rotate integrally.

There are two cam grooves 144 and 145 on the lower surface of the lower gear 124.
is formed. The outer cam groove 144 is for locking the frame member, and the inner cam groove 144 is for locking the frame member.
45 is for raising and lowering the cassette mounting plate. The details of the cam grooves 144 and 145 will be explained below, but in order to make it easier to understand in connection with the explanation of the operation described later, the direction thereof will be explained as seen from above.

The outer cam groove 144 has a special part 144a along the outer periphery and a lock part 144 located on the polishing side from the special part 144a.
b, and a rotating part 144C that connects the special part 144a and the lock part 144b. Special equipment section 144
Both the locking portion a and the locking portion 144b are formed in an arc shape with a center angle of slightly less than 180°, and the clockwise end of the special mechanism portion 144a and the counterclockwise end of the locking portion 144b are connected to the rotating portion 144C. connected by. In addition, special equipment section 14
The counterclockwise end of lock portion 4a and the clockwise end of lock portion 144b are located close to each other.

The engagement hole 142 is opened at a position slightly closer to the clockwise direction than the middle of the lock portion 144b.

The inner cam groove 145 is connected to the special machine part 145a and the elevating part 145.
b and the holding portion 145c are continuous. Special equipment section 145
a is formed in a circular arc shape with a central angle of approximately 200° at a position immediately inside the locking portion 144b of the outer cam groove 144, and the counterclockwise side end thereof is located at a position immediately inside the locking portion 144b of the outer cam groove 144.
It is located approximately one-third counterclockwise from the clockwise end of the cam groove 144a, and the clockwise end of the clockwise end corresponds to the clockwise end of the locking portion 144b of the cam groove 144. It is located about a quarter of the way counterclockwise from the side edge. Further, the fitting hole 141 is opened at a position closer to the counterclockwise direction from the clockwise side end of the special part 145a. Accordingly, the upper gear 123 and the lower gear 124 are overlapped,
When the actuated piece 134 of the lock plate 131 is inserted into the fitting hole 141 of the lower gear 124, most of the lower end 135 of the actuated piece 134 protrudes into the standby part 145a of the cam groove 145. ing.

The elevating part 145b is formed to have a center angle of approximately 12°, its counterclockwise end is continuous with the clockwise end of the special equipment part 145a, and its clockwise end is connected to the shaft part 13.
It is located close to 9.

The holding portion 145C has an arc shape with a central angle of about 40°,
The counterclockwise end thereof is continuous with the clockwise end of the elevating section 145b.

Reference numeral 146 denotes a switch pressing piece formed to extend in an arc shape at a position near the outer peripheral edge of the lower surface of the lower gear 124, and approximately 50 mm around the position corresponding to the engaging hole 142 on the outside of the engaging hole 142. It is formed in the shape of a circular arc with a central angle of °.

Thus, with the upper gear 123 and the lower gear 124 overlapped, the support shaft 122 is inserted into the respective insertion holes 127 and 140, whereby the cam gear 121 is rotatably supported by the upper chassis 42, and the cam gear 121 is rotatably supported by the upper chassis 42. In this state, the gear teeth 125, 125, . . . of the upper gear 123 are connected to the frame member 93.
Rack teeth 108, 108 of rack portion 107 formed in
,... are interlocked. Therefore, as the upper gear 123 rotates, the gear teeth 125, 125, . . . feed the rack teeth 108, 108, . will be moved to.

Reference numeral 147 denotes a drive gear, which has a pulley 149 at the lower end of the boss 148 and a pinion 150 at the upper end thereof, and is inserted into the insertion hole 148a passing through the center of the boss 148 and stands in the upper chassis 42. Support shaft 15 provided
1 is inserted so that it is rotatably supported by the upper chassis 42, and its pinion 150 is connected to the gear teeth 138, 138, . . . of the lower gear 124 of the cam gear 121.
・It is engaged with.

Reference numeral 152 denotes a motor fixed at a position on the left side of the lower rear surface of the upper chassis 42, and a drive pulley 153 is fixed to a rotating shaft 152a protruding upward from the upper chassis 42, and the drive pulley 153 and the pulley 149 An endless belt 154 is stretched between the two. Therefore,
When the motor 152 rotates, the rotation causes the drive pulley 15
3. It is transmitted to the pulley 149 via the belt 154, which rotates the pinion 150, which rotates the lower gear 124 of the cam gear 121 in which the pinion 150 and the gear teeth 138, 138, etc. are meshed. It will be done.

(d-9, frame member locking mechanism) [Fig. 2, Fig. 3, Fig. 5
7] Reference numeral 155 denotes a lock arm, which is used to hold the frame member 93 in the retracted position into the outer casing 34 (hereinafter referred to as the "retracted position").

The lock arm 155 has a substantially r<J shape, and includes a first arm 156 extending in the front-rear direction and a second arm 157 extending obliquely toward the front left from the front end of the first arm 156. The first arm 156 and the second arm 15 are integrally formed.
7 is rotatably supported by a support shaft 158 that is provided upright on the substantially right side of the support shaft 122 of the cam gear 121 .

A lock bin 159 is erected at the rear end of the first arm 156, and an actuated bin 160 is erected at the front end of the second arm 157.
has been erected.

The upper end of the actuated bin 160 is connected to the cam gear 12.
Cam groove of lower gear 124 of 1! 44, and the operated pin 160 is slidably engaged with the special part 144 of the cam groove 144.
a, the lock pin 159 is in a position close to the engagement notch 111 of the frame member 93 in the retracted position from the right side, and when the operated bottle 160 is in the lock part 144b, the lock pin 159 is in the retracted position. The frame member 93 is engaged with the engagement notch 111 of the frame member 93 in the retracted position to lock the frame member 93 in the retracted position.

(d-10, Lifting mechanism) [Figures 3 to 6, Figure 8,
FIG. 9] Reference numeral 161 denotes a lifting mechanism for lifting and lowering the cassette mounting plate 57.

Reference numeral 162 denotes a rotating lever, which is formed into a substantially "<" shape, and its bent portion is rotatably supported on a support shaft 163 erected slightly laterally to the left of the support shaft 122 for the cam gear 121 of the upper chassis 42. has been done. The tip of the first arm 164 extending substantially forward of the rotating lever 162 is provided with an actuated pin 1.
65 is erected, and two protrusions 167 and 167 are erected at the distal end of the second arm 166 extending substantially to the left and slightly spaced apart in the front-rear direction. The upper end of the driven pin 165 at the tip of the first arm 164 is slidably engaged with the cam groove 145 of the cam gear 121.

Reference numeral 168 denotes a rotating arm, which is composed of a main arm 169 and a sub-arm 170.

The main arm 169 has a substantially horizontally tilted shape when viewed from the side, and the L-shaped bent portion is an arm support wall erected on the white side of the front end of the left rear support wall 47 of the upper chassis 42. 171
It is rotatably supported at the upper end of. A sideways U-shaped engagement notch 173 that is open at the front end is formed at the front end of the first arm 172 extending in the front-rear direction, and
A spring folded piece 1 is attached to the lower end of the second arm 174 extending substantially downward.
75 is formed.

The secondary arm 170 has an inverted triangular shape with a generally low height when viewed from the side, and the portion slightly closer to the rear end than the center is the main arm 16.
It is rotatably supported at a position near the upper end of the second arm 174 of No.9. A pressed pin 176 is provided protruding rightward from the corner located on the lower side, and the pressed pin 176
is located between protrusions 167 provided at the tip of the second arm 166 of the rotating lever 162. In addition, a spring folded piece 177 is formed at the corner located on the front side.
This spring folded piece 177 and the spring folded piece 175 of the main arm 169
A tension spring 178 is tensioned between the main arm 169 and the sub arm 170, and the tension of the tension spring 178 draws the main arm 169 and the sub arm 170 so that they rotate relative to each other. The lower end of the sub arm 170 is in elastic contact with the rear surface of the pressed pin 176, and relative rotation between the two is stopped.

Reference numeral 179 denotes a projecting piece extending rightward from the rear corner of the sub arm 170.

(e. Operation) [FIGS. 1, 5, 6, 11, and 16] Next, the operation of the above-described cassette loading device 41 will be described.

(e-1, Insertion of Tape Cassette) First, when the motor 152 rotates in the unloading direction, the drive gear 147 rotates counterclockwise, and the lower gear 124 of the cam gear 121 is rotated clockwise. At this time, the lock pin 133 and the actuated piece 134 of the lock plate 131 are engaged with the engagement hole 142 and the engagement hole 141 of the lower gear 124, respectively, and the upper gear 123 is integrated with the lower gear 124. , the upper gear 123 as well as the lower gear 124 will rotate clockwise.

The frame member 9 is rotated clockwise by the upper gear 123.
Rack teeth 108, 108 of rack part 107 of No. 3,...
is sent forward, so that the frame member 93 is moved forward, and the sliding body 51 connected to the frame member 93 by the tension spring 118 and the cassette mounting plate 57 supported by the sliding body 51 are also moved forward. Both are moved forward, and when the cassette mounting space 120 reaches a position where it protrudes outward from the outlet 35 of the outer casing 34 (hereinafter referred to as the "protruding position"), the motor 152 stops.

Note that the cam gear 121 is in the state shown in FIG. 5(A).

That is, the actuated pin 160 of the lock arm 155 is located at the counterclockwise end of the special part 144a of the cam groove 144, and the actuated pin 165 of the rotary lever 162 is located at the end of the special part 144a of the cam groove 144.
It is located at the counterclockwise end of the special equipment section 145a of No. 5. Therefore, the lock pin 159 of the lock arm 155
Since it is located on the left side of the protrusion 110 of the frame member 93, the movement of the frame member 93 is not obstructed. Furthermore, since the rotating lever 162 is located at the clockwise end of its rotating range, the pressed pin 176 of the rotating arm 168 is held at the rear end of its moving range by its protrusions 167,167. As a result, the height of the engagement notch 173 at the tip of the main arm 169 corresponds to the height of the actuated pin 81 of the cassette presser 75.

In this manner, the tape cassette 1 is inserted into the cassette mounting space 120 and placed on the cassette mounting plate 57 with the cassette mounting space 120 protruding outside the outer casing 34 . At this time, the tape cassette 1 is inserted with the front part facing the rear side of the cassette loading device 41.

Incidentally, with the cassette mounting space 120 protruding outside the outer casing 34, the engaging pieces 63, 63 of the cassette mounting plate 57 are placed on the rear end portions 103, 103 of the guide pieces 101, 101. . Therefore, even if the cassette mounting plate 57 is pressed downward directly or via the tape cassette 1, the pressing force is transferred to the guide piece 101.10 via the engagement piece 63.63.
1, the cassette mounting plate 57 will not be lowered.

(e-2, Loading operation) (e-2-a, Retracting operation) When the loading command is issued, the motor 15
2 rotates in the loading direction, which causes the drive gear 147 to rotate clockwise, so that the cam gear 121
rotates counterclockwise, and the gear teeth 125, 125, . . . of the upper gear 123 are connected to the rack teeth 108 of the frame member 93.
．． 108,... will be sent towards the rear, so
The frame member 93 and the sliding body 51 are drawn into the outer casing 34 together.

When the roller 56 on the front right side of the sliding body 51 comes into contact with the rear end of the guide slit 50, the sliding body 51 can no longer move rearward, so from there, the tension spring 118 is stretched and the frame is opened. Only member 93 will move rearward.

Therefore, the cassette mounting plate 57 supported by the sliding body 51 moves forward relative to the frame member 93. Then, since the rear end surface of the tape cassette 1 hits the protrusion 100 of the frame member 93 and cannot move any further, the cassette mounting plate 57 moves forward relative to the tape cassette 1 as well, and the cassette presser 75 presser roller 79.7
9 rides on the upper surface of the tape cassette 1, and at this time, the tape cassette 1 is pressed against the cassette mounting plate 57 by the elastic force of the tension spring 84 that is expanded.

Then, as the cassette mounting plate 57 moves forward with respect to the frame member 93, the protrusion 59 of the cassette mounting plate 57
．． 59 pushes up the engagement protrusion 31.31 of the tape cassette 1 to unlock the shutter 10, and the protrusion 61.61 of the cassette mounting plate 57 pushes the engagement protrusion 31.31 of the tape cassette 1 upward.
0 and press the shutter 10 to the open position. In this way, the shutter 10
When the projections 59.59 reach the open position, the rear ends of the protrusions 59.59 escape to the front side of the engagement protrusions 31.31, so that the engagement protrusions 31.
31 engages the engagement hole 27.27 to lock the shutter 10 in the open position.

Incidentally, during such eight relative movements between the sliding body 51 and the frame member 93, the protrusion 100 provided on the frame member 93 is inserted into the notch groove 62 extending rearward from the center of the front edge of the cassette mounting plate 57.
Go inside.

Due to the relative advancement of the cassette mounting plate 57 with respect to the frame member 93 during the retracting operation described above, the cassette mounting plate 5
The engaging piece 63.63 of No. 7 is the guide piece 101.1 of the frame member 93.
01117) It moves forward from the position corresponding to the rear end portion 103.103.

Then, the front end of the cassette mounting space 120 is still attached to the outer casing 3.
4. If the tape cassette 1 is inadvertently pushed downward while the tape cassette 1 is outside, the engaging pieces 63, 63 of the cassette mounting plate 57 will move against the guide pieces 101.63 provided on the frame member 93.
Middle part 105.105 or front end part 104.10 of 101
4, it is possible to prevent the cassette mounting plate 57 from being pushed down to a height corresponding to the height in the loading completed state. Furthermore, even in the worst case, the engagement holes 64.64 of the engagement pieces 63.63
Engagement protrusion 106 on front end 104.104 of 01.101
．． 106 by engaging said space 102a.

102a and will not be pushed down below it. Therefore, although the retracting operation cannot be completed as is, it is possible to avoid definitive damage to the cassette mounting portion and other parts. If the retraction operation cannot be completed as in the above case,
- If the system is configured so that the retracting operation is performed again after returning to the protruding position, the engaging pieces 63, 63 are moved to the front end 104.
104, and will then be sequentially guided to the intermediate section 105, 105 and returned to its original position located on the rear end section 103, 103.

Immediately before the frame member 93 reaches the completely retracted position, the cam gear 1
21 is in the state shown in FIG. 5(B). That is, the actuated pin 160 of the lock arm 155 is located at the clockwise side end of the special part 144a of the cam groove 144, and the actuated pin 165 of the rotating lever 162 is located at the counterclockwise side end of the fitting hole 141. It will be half full.

While the frame member 93 reaches the completely retracted position from the state shown in FIG. 5(B), the cam gear 121 enters the state shown in FIG. 5(C). That is, during this period, the operated pin 160 of the lock arm 155 reaches approximately the middle of the rotating portion 144C of the cam groove 144, and as a result, the lock arm 155 is slightly rotated clockwise and its lock pin 159 is rotated. Frame member 9
This is the state immediately before engaging with the engagement notch 111 of No. 3. Further, the actuated pin 165 of the rotating lever 162 is connected to the fitting hole 141.
The lower half 135 of the actuated piece 134 of the lock plate 131 is pushed upward during this time. As a result, the tip of the lock plate 131 is moved upward, so that the lock pin 133 is disengaged upward from the engagement hole 142 of the lower gear 124.

When the state shown in FIG. 5(C) is reached, the frame member 93 has already reached the retracted position, so the rack teeth 108 of the frame member 93
．． 108,... and its gear teeth 125, 125,...
The upper gear 123 in which it is engaged cannot rotate any further in the counterclockwise direction. Therefore, the lower gear 124, which is given rotational force by the driving gear 14, rotates counterclockwise while pushing up the lower half 135 of the actuated piece 134 of the lock plate 131 with the edge of the fitting hole 141 in the clockwise direction. The actuated piece 134 rotates in the direction of the lower gear 1.
24, and from then on, only the lower gear 124 rotates.

In addition, in the state shown in FIG.
has reached a position close to the left side of the pressed portion 90 . From this state, the operated pin 1 of the rotation lever 162
While the lower gear 124 rotates counterclockwise until the pin 65 reaches the clockwise end of the special part 145a of the cam groove 145, the pressing pin 143 reaches a position close to the right side of the pressed part 90. During this time, the pressed portion 90 is once pressed forward. Therefore, at this time, the cassette mounting plate 5
7 further moves forward while stretching the tension spring 118 and then returns to the retracted position, but during this movement, due to manufacturing variations in the tape cassette 1, the frame member 93 and the cassette mounting plate 57 Even if the shutter 10 of the tape cassette 1 does not reach the fully open position due to insufficient relative movement between the two, the shutter 10 can be completely opened by moving through the limiter part 85. Can be locked in position. Also, press pin 1
When the cassette mounting plate 57 cannot move by the amount of forward displacement of the cassette 43, a limiter part 8
Since the tension spring 92 of No. 5 expands and absorbs the force, there is no risk of damage due to excessive force being applied to each part of the device.

Furthermore, when this retracting operation is completed, the cassette presser 7 is
The operated pin 81 of No. 5 is connected to the engagement notch 17 of the rotating arm 168.
3, and is also slidably engaged with the cassette mounting plate 5.
The engaging pieces 63 and 63 protruding to the side of the front end of the guide piece 1
Space 102 between the front end of 01, 101 and the front wall 102
a, located at a place facing the IC 12a from above.

Furthermore, the actuated pin 160 of the lock arm 155 reaches the counterclockwise end of the lock portion 144b of the cam groove 144, so that the lock pin 159 is moved to the frame member 93.
The frame member 93 is locked in the retracted position.

(e-2-b, lowering operation) Next, the lower gear 124 is moved until the actuated pin 165 of the rotary lever 162 moves the elevating portion 145b of the cam groove 145 from its counterclockwise end to its clockwise end. While rotating in the counterclockwise direction, the rotating lever 162 rotates in the counterclockwise direction, and the tip of the second arm 166 moves substantially forward.

When the tip of the second arm 166 of the rotation lever 162 moves substantially forward, a protrusion 167 provided there.
The rear one 167 of the 167 rotates the rotating arm 16.
The No. 8 pressed bin 176 is pressed forward, so that the front end of the rotating arm 168, that is, the front end of the first arm 172 of the main arm 169, moves toward the road. Forced to rotate.

When the front end of the main arm 169 moves upward, the cassette presser 7 engages with the engagement notch 173 provided there.
5 is moved upward, and thereby the cassette presser 75 is rotated so that the front ends of the arm pieces 76 and 76' are moved downward. Therefore, the first support arm 66, which is connected to the cassette presser 75 by the tension spring 84,
The distal ends of the arms 67 and 67' are rotated so as to fall downward, and the cassette mounting plate 57 supported by the distal ends of the arm pieces 67 and 67' is therefore lowered toward the cassette mounting section.

At this time, the engaging pieces 63 and 63 of the cassette mounting plate 57
The frame member 930 guide piece 101.101 front end and front wall 10
2, passing through the spaces 102a, 102a between the two.

Then, before the actuated pin 165 of the rotation lever 162 reaches the clockwise end of the elevating portion 145b of the cam groove 145, the reel hub 6.7 of the tape cassette 1 passes through the insertion hole 58.58 of the cassette mounting plate 57. The reel drive shaft 38 has entered the cassette case 2 through the insertion hole 22.22 of the shutter 10 and the insertion hole 23.23 of the cassette case 2.
．． 39 engaging shaft portions 38a, 39a.

From this state, the rotary lever 162 further rotates counterclockwise until the actuated pin 165 of the rotary lever 162 reaches the clockwise end of the elevating portion 145b of the groove 145. Since the placing plate 57 has already reached its lowering limit, the main arm 169 of the first arm 168 cannot rotate any further. Therefore, only the secondary arm 170 is further rotated, and as a result, the tension spring 178 is expanded, and the resulting elastic force is applied to the main arm 169.
The force is transmitted to the cassette mounting plate 57 via the cassette mounting plate 57, and serves as a force that presses the tape cassette 1 to the cassette mounting portion consisting of the reel drive shaft 3, 39, etc.

Incidentally, while the tape cassette 1 is being lowered from the retracted position to the cassette mounting section, the front cover 9 of the tape cassette 1 is rotated to the open position by a member (not shown).

Note that the lower gear 124 is connected to the operated pin 16 of the rotating lever 162.
5 rotates until it reaches near the clockwise end of the holding portion 145c of the groove 145. During this time, the switch pressing piece 146 provided on the lower surface of the lower gear 124 presses the operation piece of the switch (not shown), As a result, a loading completion command is issued, and the motor 152 is stopped.

As described above, the loading operation of the tape cassette 1 is completed, and then the magnetic tape 5 is pulled out from the cassette case 2, wound around the head drum 40, and is then passed through a predetermined tape path for tape loading. .

(e-3, Unloading Operation) In the unloading operation, after tape unloading is performed to store the magnetic tape 5 in the cassette case 2, the motor 152 is rotated in the unloading direction opposite to the loading operation. It is done by doing things.

Then, the loading operation described above is performed in the reverse order.

First, only the lower gear 124 of the cam gear 121 rotates clockwise, and during the state from FIG. 5(C) to FIG. 5(B), the engagement holes 130 of the upper gear 123 and the lower gear 124
and 142 are aligned, and the insertion hole 129 and the fitting hole 141 are aligned, respectively, and the lock pin 133 of the lock plate 131 is aligned.
is engaged with the engagement hole 142 of the lower gear 124, and the lock plate 13
One operated piece 134 is inserted into the fitting hole 141 of the lower gear 124. This causes the upper gear 123 to shift to the lower gear 124.
The lock arm 155 is now rotated integrally with the lock arm 155.
The operated pin 160 of the cam groove 144 is connected to the lock portion 144b of the cam groove 144.
The frame member 93 is unlocked while moving from the rack to the special equipment section 144a, and the frame member 93 locks its rack teeth 108.
108, . . . are gear teeth 125, 125 of the upper gear 123
．． It moves forward by being sent forward by ....

At the initial stage when the frame member 93 is moving forward, the tension force of the tension spring 118 is acting between the frame member 93 and the sliding body 51, so that the sliding body 51 is moved relative to the frame member 93. retreat to.

Therefore, the cassette mounting plate 57 moves backward relative to the frame member 93, while the tape cassette 1 placed thereon comes into contact with the rear side plate 99 of the frame member 93 and moves further backward. Therefore, only the cassette mounting plate 57 moves rearward with respect to the frame member 93 and the tape cassette 1, and during this time the engaging projections 31, 31 that lock the shutter 10 in the open position The protrusions 59 and 59 of the cassette mounting plate 57 push up the engagement hole 2.
7.Disengage from 27. Therefore, the shutter 10 is returned to the closed position by the force of the torsion spring 21.

Also, during this time, the engaging piece 63.6 of the cassette placement plate 57
3 is the rear end portion 103 of the guide piece 101.101 of the frame member 93
．． 103, thereby keeping it at a predetermined height.

Then, the frame member 93 and the sliding body 51 are moved to the protruding position, and the tape cassette 1 is taken out from the cassette mounting space 120 at the protruding position.

(G. Effects of the Invention) As is clear from the above description, the cassette loading device of the present invention performs a loading operation in which a cassette containing a recording medium is drawn into the outer casing and then lowered to the cassette mounting section. A cassette loading device, comprising a cassette mounting plate on which a cassette is placed, and a frame member surrounding the cassette mounting plate to form a cassette mounting space, the cassette mounting plate being placed in the front and rear directions with respect to the frame member. The frame member is formed to be slidable and movable in the vertical direction, and the frame member has a mounting surface on which a part of the cassette mounting plate rests when the cassette mounting space moves out of the outer casing. ,
The cassette mounting plate is characterized in that when it moves up and down, the above-mentioned part moves to a position away from the mounting surface of the frame member.

Therefore, according to the cassette loading device of the present invention, even if the cassette mounting plate is pressed downward when the cassette mounting space protrudes outside the outer casing, a portion of the cassette mounting plate may Because the cassette mounting plate is supported by the mounting surface provided on the frame member, the cassette mounting plate does not fall down, which can occur if the cassette mounting plate falls at a time other than the specified time. It is possible to prevent various problems such as damage to other members.

[Brief explanation of the drawing]

1 to 11 show an example of the implementation of the cassette loading device of the present invention, in which FIG. 1 is an overall perspective view, FIG. 2 is an overall plan view, and FIG. 3 is an exploded perspective view of essential parts. , 4th
The figure is an exploded perspective view of another main part, Figure 5 is a schematic plan view showing the operation, Figure 6 is a schematic side view showing the operation, Figure 7 is a side view of the frame member, and Figure 8 is the rotating arm. FIG. 9 is an exploded perspective view of the cam gear, FIG. 10 is an enlarged sectional view of the cam gear,
Fig. 11 is an enlarged sectional view showing the operation of the cam gear, Figs. 12 to 16 show the cassette, Fig. 12 is a perspective view, Fig. 13 is a perspective view of the cassette seen from below, and Fig. 14. 15 is a bottom view, FIG. 15 is an exploded perspective view, and FIG. 16 is an enlarged sectional view for explaining the operation. Explanation of symbols 1...Cassette, 5...Recording medium, 34...
Outer casing, 41... Cassette loading device, 57... Cassette placement plate, 93... Frame member, 103... Placement surface, 120.
...Cassette mounting space IHLlfJ 8 figures, 29 figures, sample surface m, 0 figures, 2 Yabu JJ
- To 11... Cassette consideration If] rIJ 4th figure 15th figure

Claims (1)

[Scope of Claims] A cassette loading device that performs a loading operation of drawing a cassette containing a recording medium into an outer casing and then lowering it to a cassette mounting section, the device comprising a cassette mounting plate on which the cassette is placed and a cassette mounting plate. The cassette mounting plate is provided with a frame member that surrounds the four sides of the mounting plate to form a cassette mounting space, and the cassette mounting plate is formed so as to be slidable in the front and rear directions with respect to the frame member and also to be movable in the vertical direction. The member is formed with a mounting surface on which a part of the cassette mounting plate rests when the cassette mounting space moves out of the outer casing, and when the cassette mounting plate moves up and down, the part of the cassette mounting plate rests on the frame member. A cassette loading device characterized by being moved to a position off the loading surface.