JPH07114046B2 - Video camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The video camera of the present invention will be described according to the following items.

A. Industrial field of use B. Outline of the invention C. Background art D. Problems to be solved by the invention E. Means for solving the problems F. Examples a. Tape cassette [Fig. 1, Fig. 1 2, 9, 11 to 14] b. Outline of video camera [Fig. 2] c. Video tape recorder [Fig. 1, 3, 5 to 11] c- 1. Recording unit [Fig. 1] c-2. Tape loading mechanism [Figs. 1, 8 and 9]
Fig.] C-3. Cassette holder [Fig. 1 to Fig. 3, Fig. 5 to Fig. 7, Fig. 11] c-4. Cassette holder locking means [Fig. 3 to 7] c-5 . Toggle mechanism [Fig. 3, Fig. 5 to Fig. 7] c-6. Rotation power biased to the cassette holder [Fig. 5] c-6-a. Position where rotation power is not biased c -6-b. Rotational force in the opening direction c-6-c. Rotational force in the closing direction c-7. Three positions of the cassette holder [Fig. 2, Fig. 5 to Fig. 7] c-7 -A. First position [Figs. 2 and 5] c-7-b. Eject position [Figs. 2 and 6] c-7-c. Second position and lock [Fig. 7] c-8. Pop-up from the second position of the cassette holder to the eject position c-9. Lock releasing means [Figs. 1 and 8] c-10. Detecting means [Figs. 1, 3 to 7] Figures, 10 to 12] d. Operation d- 1. Installation of tape cassette d-2. Detection d-3. Tape loading d-4. Shooting d-5. Eject d-6. Removal of tape cassette G. Effects of the invention (A. Industrial field) Book The invention relates to a new video camera. Specifically, for example, recording or reproduction on a tape of a video tape recorder or the like is performed with the tape pulled out from the tape cassette mounted on the tape recorder, and the tape passes through a predetermined tape path of the recording / reproducing unit. A tape recorder, in particular, a video recorder equipped with a so-called pop-up type cassette holding member, in which the unloading of the tape pulled out from the tape cassette and the ejecting operation of the cassette holding member are automatically performed by operating an eject switch. The present invention relates to a camera, and by improving the mechanism for causing the cassette holding member to perform a pop-up operation, the tape cassette can be used as a cassette holding member regardless of the orientation of the tape recorder when the eject operation is performed. A new structure that prevents the cassette holding member from falling out and allows the cassette holding member to have a lighter weight by suppressing the maximum elastic force of the elastic member used in the above-described mechanism to be small. It is intended to provide a video camera.

(B. Overview of the Invention) The present invention is performed while recording or reproducing on or from the tape, with the tape being pulled out from the mounted tape cassette and being passed through a predetermined tape path in the recording / reproducing unit. , Vertically with respect to the main body so as to move between a first position where the tape cassette can be inserted and taken out and a second position where the tape cassette is mounted in the cassette mounting position of the recording / reproducing unit. A so-called pop-up type cassette holding member, which is rotatably supported by an extending rotation support shaft, is provided, and the unloading of the tape pulled out from the tape cassette by operating the eject switch and the ejecting operation of the cassette holding member are performed. In an automatic video camera, the eject switch is operated on the cassette holding member. At this time, due to the elastic force of a predetermined elastic member, the tape cassette facing the outside from the cassette insertion opening of the cassette holding member which is closer to the first position than the second position does not fall off by the removal preventing piece. The ejecting position is moved to and retained at the ejecting position indicated by the above, and the state of reaching the first position is also retained by the elastic force of the elastic member, whereby the ejecting operation is performed. The tape cassette does not fall out of the cassette holding member regardless of the orientation of the video camera when it is moved, and the maximum elastic force of the elastic member can be suppressed to be small. Is.

(C. Background Art) Recently, as a recording medium for video cameras,
It is common to use a magnetic tape housed in a cassette case, and such a video camera usually has a cassette for holding a predetermined tape cassette in a recording / reproducing section. A holding member (sometimes referred to as "cassette compartment", "cassette holder", "cassette carrier", etc.) is provided.

There are various forms of the cassette holding member. For example, in a video tape recorder generally incorporated in a video camera or a portable video tape recorder used mainly in a state of being connected to the video camera. The so-called pop-up type is often used.

The pop-up type cassette holding member has, for example, a first position at which the tape cassette can be inserted into and taken out from the base end of the cassette holding member so as to be rotatably supported by the chassis of the recording / reproducing unit. The tape cassette inserted therein is moved between a second position where the tape cassette is mounted at a predetermined cassette mounting position in the recording / reproducing section, and the tape cassette is always moved to the first position by an appropriate elastic member.
The movement force to move to the position is urged.
The movement to the second position is performed by pressing the elastic member against the elastic force of the elastic member, and when the elastic member is in the second position, it is held in that position by a predetermined locking means. When the lock by the locking means is released from the state of being in the second position, it is moved to the first position by the elastic force of the elastic member. It has become.

The lock is released by the lock means by operating a predetermined eject switch. In many cases, when the eject switch is operated, the tape pulled out from the tape cassette is unloaded. The unlocking is performed after the unloading is completed.

(D. Problems to be Solved by the Invention) The movement of the pop-up type cassette holding member is as described above, but such a problem occurs in a video tape recorder incorporated in a video camera or a portable video tape recorder. With the pop-up type cassette holding member, when the cassette holding portion is moved to the first position while the tape cassette is inserted, the tape cassette holds the cassette depending on the orientation of the video camera at that time. There is a problem that it may fall out of the member.

That is, as described above, since the movement of the cassette holding member of this type from the second position to the first position is performed by the elastic force of the elastic member, the attitude of the video camera is set to the cassette insertion position of the cassette holding member. Trying to remove the tape cassette when the mouth is facing downward,
Alternatively, if the eject switch is operated by mistake when in such a direction, the cassette holding member will move to the first position.
As soon as the tape cassette is moved to the position, the tape cassette will drop due to its own weight.

Further, since the pop-up type cassette holding member is adapted to be moved to the first position and held at the first position by the elastic force of the elastic member, it is aimed at the second position. When it is pressed with, the elastic force of the elastic member is strengthened. Moreover, when moving the cassette holding member to the second position, it is necessary to press the cassette holding member so that the cassette holding member is reliably locked by the predetermined locking means.

Therefore, the pressing force when the cassette holding member is pressed toward the second position tends to be strong, and the cassette holding member must be robust enough to withstand such pressing force. . Further, when the elastic member is connected to only one side of the cassette holding member, the cassette holding member does not become distorted when it is pressed toward the second position. It needs to be more robust.

If the cassette holding member is made to have such a robust structure, a sheet metal material having a thickness larger than that of the sheet metal material used for the cassette holding member will be used, and further, a crosspiece and a drawing process for reinforcement will be required. However, the structure of the video camera becomes complicated, the weight increases, and the number of processing steps increases, which causes various problems.

However, if the elastic member having a weak elastic force is simply used, the cassette holding member cannot be stably held in the first position. However, there arises a problem that it becomes difficult to insert and remove the tape cassette.

(E. Means for Solving Problems) In order to solve the above problems, the tape recorder of the present invention has a first position at which the tape cassette can be inserted and removed and a tape cassette recording / reproducing unit. A video provided with a pop-up type cassette holding member rotatably supported by a pivot shaft extending in the vertical direction with respect to the main body so as to move between a second position where the cassette is mounted and the second position. In the camera, when the lock is released by the locking means for locking the cassette holding member in the second position, the cassette holding member is located closer to the first position than the second position, and the cassette insertion port of the cassette holding member. The tape cassette exposed from the outside is moved to the eject position where it is prevented from falling off by the removal prevention piece, and is held at the eject position. In addition, when the cassette holding member is located closer to the eject position than the middle position between the eject position and the first position, the cassette holding member is biased toward the eject position and the cassette holding member moves to the middle position. A toggle mechanism is provided to urge the first position side from the position to the first position side.

Therefore, according to the present invention, by releasing the lock of the cassette holding member, the cassette holding member is automatically separated from the eject position, that is, the cassette mounting position of the recording / reproducing unit, but the insertion and removal of the tape cassette with respect to the cassette holding member are still impossible. The tape cassette will be moved to a position where it cannot be held, and the tape cassette will be prevented from falling off, and the orientation of the video camera when ejecting will be changed. Even if there is, the tape cassette will not jump out of the cassette holding member as soon as it is ejected. Moreover, the cassette holding member is biased to the first position side when it is closer to the first position side than the position approximately in the middle between the first position and the second position. , Above first
The state of being in the position of will be stably maintained.

(F. Embodiment) The details of the video camera of the present invention will be described below with reference to an embodiment shown in the accompanying drawings.

The embodiment shown in the drawings is a video tape recorder (hereinafter referred to as "VT
Say R ”. ) Has been applied as.

In addition, the description will be given first on an example of a tape cassette used in a video camera, then on the video camera and then on the VTR.

(A. Tape cassette) (Fig. 1, Fig. 2, Fig. 9, Fig. 11)
FIGS. 14 to 15] 1 is a tape cassette used as a recording medium of a video camera described later.

Reference numeral 2 denotes a cassette case of the tape cassette 1, and the cassette case 2 has a thin box shape formed by integrally combining an upper half 3 and a lower half 4. Reference numeral 5 denotes the front surface of the cassette case 2 (the direction diagonally downward to the right in FIG. 13 is the front side, the direction diagonally upward to the left is the rear side, and the direction diagonally upward to the right is the left side, The right direction is the direction diagonally downward.
In the description of the tape cassette 1, the direction shall be referred to as this direction. 2) is a tape pull-out concave portion formed by bending a portion excluding both left and right ends into a substantially trapezoidal shape, and tape outlets 6, 7 are formed at both left and right ends on the front surface of the cassette case 2. There is.

8 and 9 are tape reels, and these tape reels 8
And 9 on the left side are the tape reels on the supply side (hereinafter, when the tape reel is on the supply side, "S
Reel ". ), And the tape reel 9 on the right side is the tape reel on the winding side (hereinafter, referred to as “T reel” when the tape reel is on the winding side). The tape reels 8 and 9 are formed in a substantially cylindrical shape, and reel hubs 10 and 10 'in which engaging holes (not shown) are formed facing downward and formed in the center thereof. Disk 11 fixed separately at the upper and lower ends of ′,
11, 11 ', and 11' are arranged in the cassette case 2 so as to be separated from each other in the left-right direction and rotatably housed.

In addition, at a predetermined position of the lower half 4, there are two through holes (not shown).
Reel hub 1 for tape reels 8 and 9
The lower end portions of 0 and 10 'are located in the insertion holes, and when the tape cassette 1 is mounted in a predetermined cassette mounting position of the VTR described later, the engaging shaft of the reel base provided on the VTR side passes through the insertion holes. The reel hubs 10 and 10 'are engaged with engagement holes (not shown) formed in the reel hubs 10 and 10'.

Also, the two discs 11, 11, 11 'of the tape reels 8, 9',
The lower one of 11 'is formed with a number of notches 12, 12, ..., 12', 12, '... along its outer peripheral edge.

Reference numerals 13 and 13 'are guides in the cassette. These in-cassette guides 13 and 13 'are the tape outlets 6 of the lower half 4,
The left and right side surfaces of the passage-shaped portion located on the rear side of 7 are formed on the portions closer to the tape outlets 6 and 7 on the inner sides, and have a substantially semicircular shape when viewed from above. In addition, the upper part thereof is formed so as to be higher than the upper edge of the side surface.

14 is a magnetic tape. Both ends of the magnetic tape 14 are 2
The tape reels 8 and 9 are individually fixed to the reel hubs 10 and 10 ', respectively, and are passed through the following path when the tape is not loaded. That is, after being pulled out from the S reel 8 and wound around the left inside cassette guide 13, it is led out from the tape outlet 6 to the outside of the cassette case 2 and passed through the front face of the tape pulling recess 5 and after the right inside cassette guide 13. When it is wound around ′, it is introduced into the cassette case 2 from the tape outlet 7 on the right side, and is wound around the T-side reel 9 so that the tape passes through the path.

Reference numeral 15 is a front cover that opens and closes the front surface of the cassette case 2.
The front lid 15 has a substantially horizontal U-shape that is long in the left-right direction when viewed from above, and its left and right ends are rotatably supported by the front ends of the left and right side plates of the cassette case 2 and are not shown in the drawing. The oscillating member constantly urges the turning force in the direction of closing the front surface of the cassette case 2. The front lid 15 is locked by a front lid locking means (not shown) when it comes to a position shown by a solid line in FIG. 13, that is, a position for closing the front surface of the cassette case 2 (hereinafter, referred to as a “closed position”). Further, when the tape cassette 1 is released from the lock by the locking means by being inserted into the cassette holder described later, and is inserted into the cassette mounting position of the VTR described later,
In the figure, it is moved to a position indicated by a chain double-dashed line, that is, a position where the front surface of the cassette case 2 is opened (hereinafter, referred to as “open position”). Details of these operations will be described later.

16 is a reel brake. The reel brake 16 is formed in a substantially rectangular parallelepiped shape, and is provided with arms 16a and 16b which project from the front end surface thereof in a substantially V-shape toward the front, and of the rear end portion of the cassette case 2. It is provided at a substantially central portion in the left-right direction so as to be movable in the front-back direction within a certain range. Further, 17 is a pressing spring arranged on the rear side of the reel brake 16, and the reel brake 16 is always urged forward by the pressing spring 17. The reel brake 16 has its arms 16a, 1 shown in FIG. 9 indicated by a chain double-dashed line in a state where the tape cassette 1 is not mounted on a VTR described later.
The tip of 6b is held at a position where it engages with notches 12 and 12 'formed in the lower disks 11 and 11' of the tape reels 8 and 9,
As a result, the tape reels 8 and 9 have at least the tape 14
It will be prevented from rotating in the direction of feeding. Further, when the tape cassette 1 is mounted in the cassette mounting position of the VTR, the reel brake 16 is such that a slope portion (not shown) formed on the lower surface of the reel brake 16 is pressed by a brake release pin, which will be described later, protruding from the VTR side. As a result, it is retracted to the position shown by the solid line in FIG. 9, whereby the above-mentioned brake on the tape reels 8 and 9 is released.

Reference numeral 18 is a state indicator (see FIGS. 9 and 12 to 14). The status indicator 18 indicates whether or not recording on the tape cassette 1 is permitted, in other words, whether or not the recorded content is permitted to be erased. The base portion 18a and the side piece 18b protruding leftward from the base portion 18a have a plane shape and are substantially left-side down L
A flexible piece 19 which is formed in a letter shape and which can be bent to some extent in the vertical direction is formed at the upper end portion of the side piece 18b, and a substantially convex hemispherical projection is formed on the upper surface of the distal end portion of the flexible piece 19. 20 is formed on the rear surface of the side piece 18b.
1 is formed. The state indicator 18 is provided in the cassette case 2 so as to be movable in the left-right direction in a space 22 defined to extend in the left-right direction at a corner where the right side plate and the rear side plate intersect. There is.

In addition, an opening 23 is formed in a portion of the rear side plate of the cassette case 2 near the left end of the portion corresponding to the space 22, and the left and right ends of the space 22 of the bottom plate of the lower half 4 are formed. Holes 24 and 25 are formed at corresponding positions, and the left one 24 of these holes 24 and 25 is closed by a breakable closing piece 26.

Further, on the inner surface of the top plate of the upper half 3, there are substantially concave hemispherical recesses 27 and 27 '(see FIG. 12) at a position near the left end of the rear end of the space 22 and substantially in the center in the left-right direction. Has been formed.

Then, the status indicator 18 is
The positions shown in FIGS. 14, 14 and 12 (hereinafter referred to as “erasure prohibition position”) and the positions shown by the two-dot chain line in FIG.
This is called the "erasure allowable position". ), And when the erase-prohibited position is reached, the projection 20 formed on the flexible piece 19 of the two recesses 27, 27 'formed on the upper half 3 is The click stop is applied by engaging with the left one 27, and the projection 20 is engaged with the right recess 27 'when reaching the erasing allowance position.

The hook projection 21 formed on the status indicator 18 is located in the opening 23 formed in the rear plate of the cassette case 2, and the movement of the status indicator 18 between the two positions is caused by this hook. This is performed by hooking the protrusion 21 with the tip of a nail or the like and pressing it in the left-right direction.

The right one 25 of the two holes 24, 25 formed in the lower half 4 is opened when the state indicator 18 is in the erase-prohibited position, and the state indicator 18 is in the erase-permitted position. 18a of the state indicator 18 in the state of coming to
Will be blocked.

(B. Outline of video camera) [Fig. 2] 28 is a video camera.

Reference numeral 29 is a main body of the video camera 28. The main body 29 is in the front-rear direction (the direction diagonally upward to the right in FIG. 2 is the front side, and the direction diagonally downward to the left is the rear side. The direction diagonally upward to the left is the left side, the direction diagonally downward to the right is the right side, the upward direction in the figure is the upper side, and the downward direction is the lower side. Therefore, for example, in FIG. 1, the upward direction is the front side, and the downward direction is the rear side.
The direction toward the left is the upper side, and the direction toward the right is the lower side. ) Has a long box shape, and a large square opening 30 is formed on the right side surface thereof, and a lid 31 for opening and closing the opening 30 is provided in the opening 30.

Reference numeral 32 denotes a photographing lens provided so as to project forward from the upper portion of the front end surface of the main body portion 29, and 33 denotes a recording lens arranged on the right side of the photographing lens 32 so as to be aligned therewith. Is a microphone.

Further, 34 is a handgrip whose base end is rotatably supported on the lower part of the front end of the main body 29, and a band 35 for stabilizing the grip is provided on the right side surface of the handgrip. A shooting button 36 is provided on the upper surface. still,
The handgrip 34 is designed to be locked at an arbitrary angle according to the convenience of the photographer, and the inside of the handgrip 34 serves as a battery storage portion in which a predetermined battery is stored.

37 is an optical viewfinder, and 38 is an eyecup attached so as to surround the eyepiece of the finder 37.

39 is an operation panel provided on the rear side of the main body 29,
The operation panel 39 is provided with an eject button 40 for operating an eject switch (not shown), a predetermined operation button for operating other predetermined switches, a monitor terminal hole, an indicator and the like.

(C. Video tape recorder) [Figs. 1, 3 and 5
11 to 11] 41 is a VTR provided in the main body 29 of the video camera 28, 42 is a chassis, 43 is located on the left side of the chassis 42, and four columns 44, 44, ... A circuit board provided so as to face the chassis 42 in a substantially parallel manner with a predetermined space therebetween (only three are shown in the drawing).

In addition, bent pieces 42a, 42b bent at a substantially right angle toward the left side are formed at both upper and lower ends of the chassis 42.

The VTR 41 has a recording section provided with a mechanism necessary for recording the image captured by the photographing lens and the audio captured by the microphone 33 on the magnetic tape 14 of the tape cassette 1, and the recording section of the tape cassette 1. A cassette holder for mounting in a predetermined cassette mounting position, a toggle mechanism for urging a predetermined elastic force to the cassette holder, a locking means for locking the cassette holder in a predetermined position, and an unlocking for unlocking the lock. Means, a tape loading mechanism for loading the magnetic tape onto the mounted tape cassette 1, and a detection means for detecting a predetermined position of the tape cassette 1 and a state supported by the tape cassette 1.

(C-1. Recording part) [Fig. 1] 45 is a recording part.

Reference numeral 46 denotes a head drum arranged in a substantially central portion in a vertical direction of a portion near the front edge of the chassis 42, which has a rotary magnetic head 47 for recording (see FIG. 3) and has a predetermined rotary portion. It is adapted to be rotated by a drum motor 48.

Reference numeral 49 denotes a recording magnetic head provided in the chassis 42 at a position substantially below the head drum 46.

Reference numerals 50 and 51 denote reel stands that are vertically spaced apart from each other in the portion near the rear edge of the chassis 42.
50 and 51 are reel base support shafts 52 protruding from the chassis 42,
It is rotatably supported by 52 ', and either one of them to be driven in a predetermined mode is rotated by a reel base drive gear (not shown).
The upper one of the reel stands 50 and 51 is a reel stand (hereinafter referred to as "S side reel stand") engaged with the S reel 8 housed in the tape cassette 1, and the lower one. The reel stand 51 on the side is a reel stand engaged with the T reel 9 (hereinafter referred to as "T side reel stand").

Reference numeral 53 denotes a post mounting block provided substantially above the head drum 46 in the chassis 42.
Two tape guide posts 54 and 55 are provided upright from 53, and the lower one 55 of these tape guide posts 54 and 55 is in an inclined posture so that it gradually displaces downward as it goes to its tip. It is provided. Also, 56
Is a tape guide post that is erected from a position in the chassis 42 that is located substantially obliquely rearward and upward from the post mounting block 53.

Reference numeral 57 denotes a capstan provided so as to project from a position in the chassis 42, which is located obliquely rearward and downward from a position at which the recording magnetic head 49 is provided, and the capstan 57 is a left side surface of the chassis 42. It is erected from a flywheel (not shown) located on the side.

58 is a pinch roller, and 59 is a ten pin.

Reference numerals 60, 60 'and 61, 61' are cassette positioning pins.
These cassette positioning pins 60, 60 'and 61, 61' are for controlling the position of the tape cassette 1 with respect to the recording portion 45, and of these, the front ones 60, 60 'are substantially in the front-back direction of the chassis 42. Protruding from the position near the top edge and the position near the bottom edge of the center part, and the one on the rear side 6
1, 61 'are erected from a position substantially rearward of the cassette positioning pins 560, 60' on the front side in a portion close to the rear edge of the chassis 42, and the cassette positioning pins 60, 6 on the front side are provided.
A substantially conical insertion part is provided so as to project from the front end surface of 0 '.

Reference numeral 62 is a brake release pin for retracting the reel brake 16 provided in the tape cassette 1 from the lower surface side when the tape cassette 1 is mounted on the recording unit 45. The brake release pin 62 is the chassis 42. Of these, it is provided so as to project from a position approximately in the middle between the two cassette positioning pins 61 and 61 'on the rear side.

Reference numeral 63 is a lid raising for moving the front lid 15 provided on the tape cassette 1 to the open position when the tape cassette 1 is mounted on the recording section 45. The lid raising 63 is provided on the chassis 42. The tape guide post 56 is provided in a rising shape from the position on the slightly upper side toward the right side, and when the tape cassette 1 is moved to the chassis 42 side, its tip end contacts the left end portion of the front cover 15 and Are relatively pressed to move the front cover 15 to the open position.

64 and 64 'are high speed tape guides. The high-speed tape guides 64 and 64 'are guide members for restricting the tape path when the magnetic tape 14 runs at high speed, and have a width substantially equal to or slightly larger than the width of the magnetic tape 14 and in the left-right direction. When viewed from above, it is formed in a substantially J-shape, and the turning end portion corresponding to the J-shaped bent portion has a radius slightly larger than the tape contact surface of the cassette guides 13 and 13 'formed in the tape cassette 1. It has a substantially semi-arcuate shape, and its base end is fixed to cylindrical shafts 65, 65 '. Axis 6
Gears 66 and 66 'are integrally formed with the reference numerals 5 and 65'. The high-speed tape guides 64, 64 'have their shafts 65, 65'.
Is the cassette positioning pins 60, 6 on the front side of the chassis 42.
Support shafts 67, 6 protruding from a position closer to the front side from 0 '
7'is rotatably supported and is held at the position shown in FIG. 1 by a control member (not shown) meshing with gears 66, 66 'except when the tape is running at high speed.
When the tape runs at high speed, it is moved to the position shown in FIG. 9 by the control member.

(C-2. Tape loading mechanism) [Fig. 1, Fig. 8,
FIG. 9] 68 is a loading ring formed in a substantially annular shape and having gear teeth formed on its outer peripheral edge. Although not shown, the left side of the loading ring 68 is also substantially the same. Another loading ring of a size (hereinafter, for the loading ring not shown in the figure, reference numeral "68 '" is used for convenience of description) is located coaxially with the right loading ring 68. Then, the loading rings 68 and 68 'are connected to the head drum 46.
Chassis 42 and the inner peripheral edge of the chassis 42
The rollers 42, 69, 69 are rotatably supported by the chassis 42 by being slidably engaged with the grooves formed in the three rollers 69, 69, 69 rotatably supported by There is.

70 is a loading motor provided on the left side of the chassis 42, 71 is a worm provided on the right side of the chassis 42 so as to be rotatable, and an output pulley 70a fixed to the output shaft of the loading motor 70 and A transmission belt 72 is stretched between a driven pulley 71a fixed to the shaft of the worm 71 and the driven belt 71a. Further, 73 is a worm wheel meshed with the worm 71, and 74 is a small gear portion 73a of the worm wheel 73 and the two loading rings 68, 68 '.
The drive gear meshed with the right one 68 of the two, the gear 75 meshed with the small gear portion 73a of the worm wheel 73 via an intermediate gear (not shown), and the left loading ring 68 '.
Is a drive gear meshed with. Therefore, when the loading motor 70 is rotated in a predetermined direction, the rotation is transmitted to the drive gears 74 and 75 via the transmission belt 72, the worm 71, and the worm wheel 73, so that the loading ring 68,
68 'is rotated in a predetermined direction. The loading rings 68 and 68 'are rotated in the opposite directions, and when the tape is loaded, the right loading ring 68 is rotated counterclockwise (hereinafter, the right loading ring 68 Of the left loading ring 68 'in the clockwise direction (hereinafter, referred to as the "loading direction" of the left loading ring 68').
Each is designed to rotate about half a turn.

76 and 76 'are loading blocks, and two tape loading posts 77, 78, 77', 78 'are erected from the loading blocks 76, 76', respectively. The upper one 76 of the loading blocks 76, 76 'is connected to the left loading ring 68' through a connecting means (not shown), and the lower loading block 76 'is also connected through a connecting means (not shown). Is connected to the right loading ring 68. When the tape is not loaded, the loading rings 68 and 68 'are loaded into the loading blocks 76 and 68'.
When the tape is loaded, 76 'is shown in the solid line in FIG. 1 and in the position shown in the double-dotted line in FIG. 8 (hereinafter referred to as "non-loading position"). The guide blocks 76, 76 'are rotated to a position shown by a chain double-dashed line in FIG. 1 and shown by a solid line in FIG. 8 (hereinafter referred to as "loading completion position").

When the tape is unloaded, the loading rings 68 and 68 'are rotated in the opposite loading direction.

Loading of the magnetic tape 14 from the tape cassette 1 mounted on the recording unit 45 is performed by the above-mentioned tape loading posts 77, 77 ', 78, 78', which will be described later.

Further, the loading of the tape is started when a predetermined item is detected by the detecting means described later, and the unloading is performed by operating the eject button 40.

Further, when the tape is running at high speed, the loading rings 68, 68 'are returned to the positions closer to the complete loading position side than the non-loading position.

(C-3. Cassette holder) [Figs. 1 to 3 and 5
FIGS. 7 to 11, FIG. 11] 79 is a cassette holder for mounting the tape cassette 1 in a predetermined cassette mounting position of the recording unit 45.

Reference numerals 80 and 81 denote side plates of the cassette holder 79.
81 is formed in a long and thin plate shape in the front-rear direction, is vertically spaced apart from the tape cassette 1 by a distance substantially equal to the length in the left-right direction, and is positioned so as to extend in parallel with each other, and its front end portion is , Rotatably supported by pins 83, 83 'on side pieces 82a, 82'a that are bent at a substantially right angle toward the rear of the support portions 82, 82' that project rightward from the front end of the chassis 42. Has been done.

Reference numeral 84 is a bottom plate of the cassette holder 79. The bottom plate 84 is provided so as to connect the rear portions of the left end edges of the side plates 80 and 81, and therefore, the rear portion of the cassette holder 79 is formed in a substantially U shape when viewed from the front. Then, the front end edge of the bottom plate 84 is bent so as to form a substantially trapezoidal shape, and the substantially central portion of the rear end edge is cut out in a substantially semicircular shape. And the bottom plate 84
Are circular holes 85, 8 which are vertically spaced from each other.
5'is formed, and the holes 85 and 85 'are formed on the reel base 5
They are formed at positions corresponding to 0 and 51, respectively. Furthermore,
From the positions near the upper and lower ends of the front edge of the bottom plate 84, the protruding pieces 86, 8
6'projects toward the front, and the tips of the projecting pieces 86, 86 'are bent toward the right side at a substantially right angle.
It is 7, 87 '.

Reference numeral 88 is a locked piece formed by cutting and raising a part of the lower end portion of the bottom plate 84 toward the left side, and the locked piece 88 is formed to have a substantially L shape when viewed from below. . 88
a is the claw part.

Reference numeral 89 denotes a short lid lock release protrusion formed on the upper end of the bottom plate 84, and the lid lock release protrusion 89 is formed so as to vertically project from the right side surface of the bottom plate 84. The lid lock releasing projection 89 is for releasing the lock of the front lid 15 of the tape cassette 1 inserted into the cassette holder 79.

Reference numeral 90 is a substantially round bar-shaped crosspiece that is provided so as to bridge between the rear ends of the side plates 80 and 81 near the right end. The distance between the crosspiece 90 and the bottom plate 84 is the thickness of the tape cassette 1. The length is almost equal to.

Further, from the rear end portion and the front end portion of the right end edge of the side plates 80, 81, mounting pieces 91, 91, ... Protruding inward in the vertical direction are formed, and the video cameras are formed.
A lid for opening and closing the opening 30 formed in the body 29 of the 28
The four corners of 31 are fixed to the cassette holder 79 by fixing the four corners to these mounting pieces 91, 91, ....

At the rear of the cassette holder 79, the side plates 80, 81
The bottom plate 84, the crosspiece 90, the stoppers 87, 87 ', etc. define a space having a size substantially the same as the size of the tape cassette 1, and the tape cassette 1 has a rear end, that is, a space. , It will be inserted from the cassette insertion port. That is, the tape cassette 1 is a cassette holder
It is inserted into 79 as shown in FIGS.

The tape cassette 1 is inserted into the cassette holder 79 until the cassette case 2 contacts the stoppers 87 and 87 '.

Then, when the tape cassette 1 is thus inserted into the cassette holder 79, the lid lock release protrusion 89 is relatively inserted into a slit (not shown) formed at the left end of the cassette case 2, whereby the front lid is released. Locking means (not shown) for holding 15 at the closed position is unlocked.

Reference numerals 92 and 92 'denote cassette holders for holding the tape cassette 1 inserted in the cassette holder 79 as described above against the bottom plate 84 so that the inserted positions are not displaced.

In addition, a relatively large notch 93 reaching the left edge of the cassette holder 79 is formed in the portion of the lower side plate 81 of the lower side of the cassette holder 79 in the front-rear direction from the central portion toward the front.
Of the 81, a pin 94 projects downward from a position closer to the front side of the front edge of the cutout 93, and the pin 94
An engaging roller 95 is fitted on the outside.

It should be noted that the cassette holder 79 is biased with a predetermined turning force by a toggle mechanism, which will be described later, and locked by a locking means, which will be described later, at a predetermined position.

(C-4. Cassette holder locking means) [FIGS. 3 to 7] 96 is at a position where the tape cassette 1 having the cassette holder 79 is mounted at a predetermined cassette mounting position of the recording unit 45. It is a locking means for locking.

A lock slider 97 is provided along the lower edge of the chassis 42 so as to be slidable within a certain range.
The lock slider 97 is formed in a long and thin plate shape in the front-rear direction as a whole, and a short pressed piece 98 bent to the right side is formed in a rising shape at the front end portion thereof and is separated from each other in the front-rear direction. The long holes 99 and 100 extending in the front-rear direction are formed at the two positions, and protrude rightward from the portion between the substantially central portion of the lower side edge and the position near the rear end. A substantially trapezoidal projecting piece 101 that is long in the front-rear direction is integrally formed, and a substantially U-shaped notch 102 that extends from the right side edge to the middle is formed in the substantially central portion of the projecting piece 101. . The lower one-third portion of the rear end portion of the lock slider 97 in the widthwise direction is bent 103 toward the left at a substantially right angle, and the rear end portion of the upper one-third portion is approximately one-third. The edge 104 is located on the front side of the bent portion 103.

And a position of the lower side of the chassis 42 near the bent piece 42b, which is closer to the rear side from the central portion in the front-rear direction,
Guide pins 105 and 106 protruding rightward are provided so as to protrude from a substantially middle portion between the position and the rear edge. Also the chassis
An elongated hole 107 extending in the front-rear direction is formed in a substantially middle portion between the rear guide pin 106 and the rear end of the lower portion of the lower portion 42 near the bent piece 42b.

Then, the lock slider 97 has a bent portion 103 at the rear end.
Is positioned in the long hole 107, and the guide pins 105 and 106 provided upright from the chassis 42 are slidably engaged with the long holes 99 and 100 to slide the chassis 42 in the front-rear direction. It is movably supported and its pressed piece 98
The tension spring 108 bridged between the spring hooking hole 98a formed in the
The movement force to move backward is urged. The lock slider 97 is prevented from coming off the guide pins 105 and 106 by using the long holes 99 and 10 of the guide pins 105 and 106.
It is made of a retaining washer attached to the part that protrudes from 0 to the right.

In addition, in the lower portion of the chassis 42 near the bent piece 42b, the following square hole is formed in addition to the elongated hole 107. That is, the hole 1 is provided in the portion that is close to the elongated hole 107 from above.
09 is formed, and a hole 110 whose lower end reaches the right end of the bending piece 42b is formed at a position closer to the rear side of the guide pin 105 on the front side, and is separated from the hole 110 to the front side of the structure. A hole 111 is also formed in the opened portion.

The rear edge 104 of the lock slider 97 is located above the hole 109.

112 is a swing arm. The swing arm 112 is formed in a plate shape having a substantially dharma shape, and the base end portion thereof is the chassis 42.
The lower bent piece 42b is rotatably supported by a support shaft 113 projecting upward from a portion located on the left side of the hole 110, and its tip is passed through the hole 110 to the right side of the chassis 42. It is projected to the surface side. The tip of the swing arm 112 is a pin positioned so as to penetrate therethrough in the plate thickness direction.
114 is provided, and the swing arm 112 of the pin 114 is provided.
A lock roller 115 is rotatably supported at a portion protruding upward from the lock slider 9 and a portion of the pin 114 protruding downward from the swing arm 112 is the lock slider 9.
7 is engaged with a notch 102 formed in the projecting piece 101.

Therefore, since the tip of the swing arm 112 is connected to the lock slider 97 via the pin 114, the swing arm 112 swings as the lock slider 97 slides in the front-rear direction, and the lock roller 115 moves substantially forward and backward. Will be moved in the direction.

116 is a slider stopper. The slider stopper 116 is formed in a substantially L shape when viewed from above and below, and a hole 117 whose axial center extends along the up and down direction is formed at a front end portion of a portion 116a that extends along the substantially front and back direction. . Reference numeral 118 is a pressed piece formed integrally with the slider stopper 116, and the pressed piece 118 is bent in a substantially V shape, and a substantially left half portion thereof is in a substantially left-right direction of the slider stopper 116. It is continuous to the upper side of the portion 116b extending along the line. And slider stopper
116 is rotatably supported by the support shaft 113 by inserting a portion of the support shaft 113 protruding upward from the swing arm 112 into the hole 117.

Reference numeral 119 is a torsion spring. The torsion spring 119 has its coil portion 119a fitted onto the support shaft 113, one arm 119b of which is elastically contacted with the chassis 42 from the left side, and the other arm 119c of which is a slider. The part 116a of the stopper 116 is elastically contacted from the left side.

Thus, the slider stopper 116 is biased by the elastic force of the torsion spring 119 in the counterclockwise direction in FIGS. 5 to 7, and a pressing force is applied to rotate it in the clockwise direction. While it is not held, as shown in FIGS. 5 and 6, the portion 116a is held at a position in contact with the left side surface of the chassis 42 (hereinafter, referred to as “blocking position”), In this state, most of the portion 116b of the slider stopper 116 and the pressed piece 118 pass through the hole 109 formed in the chassis 42 and most of the chassis 42.
Will be located on the right side.

Therefore, with the slider stopper 116 in the blocking position, the rear edge 104 of the lock slider 97 is
Comes into contact with the front side surface of the portion 116b of the slider stopper 116. Further, when the pressed piece 118 is pressed from the right side from that state, the slider stopper 116 is rotated clockwise against the elastic force of the torsion spring 119, and the right end surface of the portion 116b is the chassis 42. It will be moved to a position on the left side of the right side surface (hereinafter referred to as "non-blocking position"). Then, when the slider stopper 116 is moved to the non-blocking position, the portion 116b escapes to the position on the left side of the rear end edge of the lock slider 97, so that the force exerted on the lock slider 97 by the spring 108 is increased. Will be moved backwards.

The slider stopper 116 is pressed from the right side by the bottom plate 84 of the cassette holder 79. This operation will be described later.

(C-5. Toggle mechanism) [FIG. 3, FIG. 5 to FIG. 7] Reference numeral 120 is a toggle mechanism for biasing the cassette holder 79 with a predetermined turning force and holding it at a predetermined position. is there.

121 is the first link. The first link 121 is formed in a plate shape that is long in the left-right direction, is located on the left side of the chassis 42 at its left end, and is the chassis 42 of the bent pieces 42b on the lower side of the chassis 42. The hole 111 formed in
Is rotatably supported by a support pin 122 projecting upward from a portion located on the left side of the chassis so that the right side portion thereof projects from the left end portion thereof toward the right side surface of the chassis 42 through the hole 111. Is located in. 123 is the first link 1
The stopper 123 is provided on the upper side surface of 21. The stopper 123 is provided at a position near the front edge of a portion of the first link 121 in the left-right direction from the central portion toward the right side.

124 is the second link. The second link 124 has a width slightly larger than the width of the first link 121 and is formed in a plate shape slightly shorter than the length of the first link 121, and its width is one end, that is, It is formed such that it gradually widens from the rear end to the front end in the state shown in the position shown by the chain double-dashed line in FIG. Also, the second link 12
An engaging hole 125 having a substantially right triangle shape when viewed from above is formed in the front end portion of 4. That is, in the above-mentioned state shown in FIG. 5, the three inner edges 125a, 125 of the engagement hole 125 are formed.
One of b and 125c, 125a (hereinafter, referred to as "first inner edge") extends substantially diagonally to the left,
The other inner edge 125b (hereinafter, referred to as "second inner edge") extends from the rear end of the first inner edge 125a substantially diagonally leftward and forward, and the other inner edge 125c. (Less than,
Say "the third inner edge". ) Extends from the front end of the first inner edge 125a in a direction substantially perpendicular to the first inner edge 125a, that is, toward the left diagonal front.

The first inner edge 125a and the second inner edge 1 of the engagement hole 125 are
The corner portion 125d in which 25b is continuous is referred to as a "first corner portion", and the corner portion 12 in which the first inner edge 125a and the third inner edge 125c are continuous.
5e is called the "second corner".

The second link 124 is positioned such that its front end portion is superposed on the right end portion of the first link 121 from above, and the superposed portions thereof are rotatable by the connecting pin 126. The cassette holder 79 is connected to the cassette holder 79 by positioning the engagement roller 95 located in the engagement hole 125 so as to project downward from the lower side plate 81 of the cassette holder 79. It is connected.

Reference numeral 127 denotes a toggle spring formed in the shape of a coil spring. The toggle spring 127 is a spring hook formed on a lower support portion 82, 82 'formed at the front end of the chassis 42 in a state of being extended by a predetermined amount. It is bridged between the hole 128 and a spring hook hole 129 formed at a position near the left end of the first link 121.

Therefore, the first link 121 has a toggle spring 127,
The turning force in the counterclockwise direction in FIGS. 5 to 7 is urged.

(C-6. Turning force urged by the cassette holder) [Fifth
[Fig.] The toggle mechanism 120 described above is attached to the cassette holder 79.
Thus, two turning forces that act in opposite directions with the condition that the cassette holder 79 is in a predetermined position as a boundary are urged.

(C-6-a. Position at which rotational force is not applied) As described above, the cassette holder 79 is provided with the second link.
Although it is connected to the first link 121 via 124, the engagement roller 95 provided on the side plate 81 and the engagement hole 125 formed in the second link 124 are engaged with each other. Are movably connected to each other and the second link
Since the connection point between the first link 121 and the first link 121 is connected to each other in a rotating state, the turning force in the counterclockwise direction biased by the first link 121 is directly applied to the cassette holder 79. Although it is not urged, it acts on the cassette holder 79 in the same direction only in a certain state.

That is, as shown by the chain double-dashed line in FIG.
That is, the connection point between the first link 121 and the second link 124, the engagement roller 95, that is, the connection point between the second link 124 and the cassette holder 79, and the pin 83 ', that is, the connection point. In a state in which the rotation center of the cassette holder 79 is entirely aligned, the direction in which the turning force of the first link 121 appears on the connecting pin 126 is the second link 124 and the engaging hole 125.
It goes through the first corner portion 125d and the engaging roller 95 toward the pin 83 'which is the center of rotation of the side plate 81 of the cassette holder 79.

In this state, the turning force of the first link 121 causes the first corner portion 125d of the engaging hole 125 of the second link 124 to engage the engaging roller.
It acts so as to press it against 95 and also press the side plate 81 of the cassette holder 79 against the pin 83 '.

Therefore, in this state, the first link 121 and the second link 121
Since the links 124 are prevented from rotating, the cassette holder 79 is not urged to rotate in either the clockwise direction or the counterclockwise direction.

The position of the cassette holder 79 in this state is called the "intermediate position".

(C-6-b. Rotational force in the opening direction) However, when the cassette holder 79 is located on the side opposite to the chassis from the intermediate position, the engagement roller 95 is located to the right of the linear position. Since the first link 121 is positioned, it rotates in the counterclockwise direction according to the turning force applied by the first link 121. Therefore, the connecting pin
126 will be moved to the left diagonally forward.

The second link 124 has its one end pressed substantially diagonally forward leftward by the movement of the connecting pin 126 diagonally forward leftward.
The point where 125 is engaged with the engagement roller 95 of the cassette holder 79 is located on the right side of the pressing force direction,
Moreover, since the movement locus of the engagement roller 95 is constant, the pressing force acts as a force for rotating the second link 124 in the clockwise direction and for moving the other end to the substantially right side. It will be.

Further, when the second link 124 is rotated in this manner, the engagement hole 125 thereof is moved substantially to the opposite side of the chassis 42, so that the first corner portion 125d of the engagement hole 125 and the second Inner edge of 125
The b presses the engagement roller 95 substantially toward the chassis 42 side.

As a result, the turning force in the counterclockwise direction is applied to the cassette holder 79.

In addition, the rotation of the first link 121 in this case is the fifth
As shown by the solid line in the figure, the part of the front side edge near the left end is blocked when it abuts on the front side edge of the hole 111 formed in the chassis 42.

Further, in this way, the counterclockwise turning force urged by the cassette holder 79 is changed to the "opening direction turning force".
Say

(C-6-c. Rotational Power in Closing Direction) Contrary to the above case, when the cassette holder 79 is located closer to the chassis 42 than the intermediate position, the engagement roller 95 is Since it is located on the left side of the position on the straight line, in this case as well, the first link 121 is rotated in the counterclockwise direction by the turning force applied thereto.

Also in this case, the second link 124 has its one end portion pressed substantially diagonally forward leftward by the connecting pin 126 that is moved diagonally forward leftwardly, but the engaging hole 125 thereof is formed.
Is engaged with the engagement roller 95 on the left side of the direction in which the pressing force is directed, the second link 124 is rotated counterclockwise while the other end is substantially It will be moved to the left.

Therefore, the engagement roller 95 causes the first inner edge 125 of the engagement hole 125 to
Since it is pressed by a toward substantially the left side, that is, toward the chassis 42 side, the rotational force in the clockwise direction is urged to the cassette holder 97. The clockwise turning force thus urged by the cassette holder 79 is referred to as "closing direction turning force".

Incidentally, the rotation of the first link 121 in this case is the sixth
The second link 124 is attached to the stopper 123 as shown.
Will be blocked by abutting from the front diagonally right. That is, the turning force urged by the second link 124 is added to the first link 121 itself by contacting the stopper 123 of the first link 121. Therefore, in this state, the toggle spring 127 The elastic force acts to integrally rotate the first link 121 and the second link 124 in the counterclockwise direction. Therefore, the rotation center of the engagement hole 125 in this state is the connecting pin 1.
Instead of 26, it becomes the support pin 122 at the center of rotation of the first link 121, so that the rotation direction of the engagement hole 125 is substantially diagonally forward left. That is, in this state, the engagement roller 95 is pressed by the first corner portion 125d of the engagement hole 125 substantially diagonally leftward and forward. However, in this state, since the engagement roller 95 is located at a position substantially in front of the pin 83 'which is the center of rotation of the engagement roller 95, the movable direction of the engagement roller 95 is only substantially leftward. . Therefore, since the direction in which the engagement hole 125 presses the engagement roller 95 and the movable direction of the engagement roller 95 do not match, the engagement roller 95 is in a state where it cannot move from that position. . In this way, the first
The rotation of the link 121 is blocked.

(C-7. Three positions of cassette holder) [FIG. 2, FIG. 5 to FIG. 7] Therefore, the cassette holder 79 should be held in the following three positions at that position. become.

(C-7-a. First position) [Figs. 2 and 5] As described above, when the cassette holder 79 is located on the right side of the intermediate position, the toggle mechanism 120 opens it. Since the turning force is applied to the first link
Until the counterclockwise rotation of the cassette holder 121 is blocked by the abutment of the front edge of the hole 111 with the cassette holder 121,
79 will be rotated counterclockwise. And
When the rotation of the first link 121 is blocked, the cassette holder 79 comes to the position shown in FIGS. 2 and 5 (hereinafter, referred to as “first position”).

When the cassette holder 79 is in the first position, the engaging roller 95 has a first corner portion 125 of the engaging hole 125.
d is in contact, and the second corner portion 125e is located substantially on the right side of the engagement roller 95, the engagement roller 95
The engagement hole if it is not blocked from moving to the right.
Although it can move to the position where it abuts on the third inner edge 125c of 125, when the cassette holder 79 comes to the first position, the front edge of the side plates 80, 81 of the cassette holder 79 comes to the supporting portions 82, 82 of the chassis 42. 'Because it comes into contact with the rear surface of the cassette holder
The 79 can no longer rotate counterclockwise.

Then, the state where the cassette holder 79 is in the first position is held unless it is pressed from the right side with a force stronger than the pulling force of the toggle spring 127.

When the cassette holder 79 comes to the first position, most of the cassette holder 79 is, as shown in FIG.
It is positioned so as to project rightward from the opening 30 formed in the right side surface of the main body portion 29. Therefore, the rear end surface of the cassette holder 79, that is, the cassette insertion opening is located on the side of the video camera 28.

Then, the insertion of the tape cassette 1 into the cassette holder 79 and the removal of the tape cassette 1 inserted therein are performed with the cassette holder 79 in the first position.

(C-7-b. Eject position) [Figs. 2 and 6] As described above, when the cassette holder 79 is located on the left side of the intermediate position, the toggle mechanism 120 closes it. Since the turning force is applied to the cassette holder 79, the rotation of the cassette holder 79 in the counterclockwise direction is prevented until the first link 121 comes into contact with the stopper 123 of the second link 124 to prevent its rotation in the counterclockwise direction. It will be rotated in the clockwise direction. When the above-described rotation of the first link 121 is blocked, the cassette holder 79 is shown at the two-dot chain line in FIG. 2 and at the position shown in FIG. 6 (hereinafter referred to as “eject position”). Will come. Further, as described above in this state, the direction of the turning force of the first link 121 and the second link 124, which try to rotate integrally with each other, and the movable direction of the engagement roller 95 do not match. The engaging roller 95 is pressed against the portion of the second inner edge 125b of the engaging hole 125 near the first corner 125d.

Therefore, in this state, the cassette holder 79 is held at the eject position unless the cassette holder 79 is pressed in the left-right direction by a force stronger than the pulling force of the toggle spring 127.

When the cassette holder 79 comes to the eject position, as shown in FIG. 2, the lid 31 attached to the cassette holder 79 opens the opening 30.
Although it is positioned so as to come to a position in which it is slightly opened, most of the cassette insertion opening of the cassette holder 79 is still located in the main body part 29. Further, in this state, the retainer pieces 130, 130 'which are erected from the rear end of the chassis 42 toward the right side are located at the cassette insertion port so as to face each other from the rear side.

Then, when the cassette holder 79 comes to the eject position, the tip of the claw portion 88a of the locked piece 88 is lightly contacted with the portion of the lock roller 115 that is directed substantially obliquely rearward right, and the lower end portion of the bottom plate 84 thereof. Comes close to or slightly contacts the tip of the pressed piece 118 of the slider stopper 116.

(C-7-c. Second position and lock) [Fig. 7] When the cassette holder 79 is pushed from the right side with a force stronger than the pulling force of the toggle spring 127 from the state where it is in the eject position. While increasing the pulling force of the toggle spring 127, that is, while pulling the toggle spring 127, the toggle spring 127 is further rotated to the chassis 42 side.

That is, when the cassette holder 79 is pressed from the eject position as described above, the engaging roller 95
Will rotate in the clockwise direction while pressing the second inner edge 125b of the engaging hole 125 formed in the second link 124 toward the left obliquely rearward. Therefore, the first link 121
Since the second link 124 is rotated clockwise around the support pin 122, the toggle spring 127 is stretched and the pulling force thereof is increased.

In this way, when the cassette holder 79 is rotated until the engaging roller 95 comes into contact with the substantially central portion of the second inner edge 125b of the engaging hole 125, the locked piece The claw portion 88a of 88 comes to the left of the lock roller 115 while pressing the lock roller 115 slightly forward. Further, at the same time, the pressed piece 118 of the slider stopper 116 has the bottom plate 84 of the cassette holder 79.
It is moved to the non-blocking position by being pressed from the right side by. Therefore, the portion 116b of the slider stopper 116 escapes to a position that does not face the rear edge 104 of the lock slider 97.

As a result, the lock slider 97 moves the tension spring 10
Since it is moved rearward by the pulling force of 8, the pin 114 that engages with the notch 102 formed in the projecting piece 101, that is, the pin provided at the tip of the swing arm 112 is pressed backward. As a result, the lock roller 115 is moved backward, and the claw portion 88a of the locked piece 88 of the cassette holder 79 is moved.
Will be engaged from the right side. Therefore, the locked piece
88 is prevented from moving to the right by the lock roller 115.

The lock slider 97 prevents the lock roller 115 from moving further rearward by contacting the front end edge of the locked piece 88. Further, in this state, the rear end edge 104 of the lock slider 97 is the slider stopper 1
It is located slightly away from the right end of the 16 portion 116b to the right.

Thus, as shown in FIG. 7, the cassette holder 97 is held at a position where the bottom plate 84 faces the chassis 42 substantially in parallel (hereinafter, referred to as "second position").

When the cassette holder 97 reaches the second position with the tape cassette 1 inserted, the tape cassette 1 is erected from the chassis 42 in two positioning holes (not shown) formed in the cassette case 2. The conical insertion portions of the cassette positioning pins 60 and 60 'on the front side are inserted, whereby positioning is performed in a direction parallel to the chassis 42, and the above-mentioned positioning of the bottom surface of the cassette case 2 is performed. The opening edge of the hole is brought into contact with the front end surfaces of the cassette positioning pins 60 and 60 'on the front side, and the bottom surface of the rear end portion is brought into contact with the front end surfaces of the cassette positioning pins 61 and 61' on the rear side. The positioning in the height direction with respect to the chassis 42 is performed.

That is, the tape cassette 1 is mounted in the predetermined cassette mounting position of the recording unit 45 when the cassette holder 79 comes to the second position.

(C-8. Pop-up from the second position of the cassette holder to the eject position) On the other hand, when the cassette holder 79 is locked in the second position, the lock slider 97 moves the lock roller 115 to the locked piece of the cassette holder 79. When the claw 88a of the 88 is moved to a position away from the claw 88a, the blocking of the locked piece 88 to the right is released.
79 is in a state where it can be rotated counterclockwise.

Therefore, the first link 121 and the second link 124 are
The engaging roller 95 that had been in contact with the second inner edge 125b of the engaging hole 125 of the link 124 of FIG. It will be rotated counterclockwise.

As a result, the engagement roller 95 is pressed by the second inner edge 125b of the engagement hole 125 in a substantially diagonally right forward direction.
The cassette holder 79 will be rotated counterclockwise. That is, it will be popped up.

However, the rotation stops when it reaches the eject position. In other words, the engaging roller 95 is pushed forward in the substantially right diagonal direction as described above, so that the engaging hole is formed.
It comes into contact with the first corner portion 125d of the 125, and in this state, as described above, the movable direction of the engagement roller 95 and the first link 121 and the second link 121 that press this.
Since the direction of the rotational force of the link 124 of FIG. This is because it will not move in the direction of.

Therefore, even if the cassette holder 79 is unlocked by the locking means 96 from the state in which the cassette holder 79 is in the second position, the engagement roller 95 of the cassette holder 79 has the second inner edge 1 of the engagement hole 125.
The toggle mechanism 120 itself is rotated by a rotation angle corresponding to the amount of movement from the position in contact with the substantially central portion of 25b to the position in contact with the first corner portion 125d. It will be held in that position.

As described above, even when the cassette holder 79 comes to the eject position, most of the cassette insertion opening is still located inside the main body portion 29 of the video camera 28, and the cassette insertion opening has a chassis. 42 retaining pieces 130, 130 '
Are opposed to each other from the rear, so that when the cassette holder 79 is popped up from the second position to the eject position, the cassette holder 79 is inserted into the cassette holder 79 regardless of the orientation. The tape cassette 1 that is present does not jump out of the video camera 28.

When the cassette holder 79 is moved from the second position to the eject position, the slider stopper 116 is returned to the blocking position by the elastic force of the torsion spring 119, and the lock slider 97 has its rear edge 104 at the slider stopper. It returns to the position where it abuts the portion 116b of 116 from the front side.

(C-9. Roller release means) [FIGS. 1 and 8] 131 is a lock release means for automatically releasing the lock on the cassette holder 79 made by the lock means 96. The means 131 is adapted to be operated by the loading ring 68.

Reference numeral 132 denotes a pressing protrusion provided on the right loading ring 68, and the pressing protrusion 132 is projected to the left side from a portion of the left side surface of the loading 68 located substantially behind the lower loading block 76. It is provided in. Therefore, the pressing projection 132 is shown in FIG. 1 in the state where the tape loading is not performed, and is in the position shown by the chain double-dashed line in FIG. 8, and when the tape loading is performed, the broken line is shown in FIG. It will be moved to the position indicated by.

133 is a control lever. The control lever 133 has a substantially L shape as a whole, and elongated holes 134 and 135 extending in the vertical direction are formed in a rear portion 133a and a front end portion 133b,
At the upper end of the rear part 133a, a pressed piece bent toward the right side
136 is formed. Then, the control lever 133 has its elongated holes 134, 135 in a state in which the pressed piece 136 is positioned in a portion corresponding to substantially rearward of the head drum 46 between the two loading rings 68 and 68 '. Is slidably engaged with guide pins 137 and 138 protruding from the chassis 42, so that it is supported by the chassis 42 so as to be slidable within a certain range in the vertical direction, and is not shown. The moving force is urged downward by the generating means.

In the state where the tape is loaded, the control lever 133, as shown by the solid line in FIG. 8, has the upper ends of the elongated holes 134 and 135 on the guide pins 137 and 138 by the elastic means (not shown). The loading rings 68, 68 'are held at the abutted position (hereinafter referred to as "release preparation position"), and the tape is unloaded from that state.
Is returned to its original position, its pressed piece 136 is pressed substantially upward by the pressing protrusion 132 provided on the loading ring 68, as shown in FIG. 1, and
It is moved to a position indicated by a chain double-dashed line in FIG. 8 (hereinafter, referred to as “release position”) and is held at that position by the pressing protrusion 132.

139 is a kick lever. The kick lever 139 is formed in a substantially rectangular plate shape, and a small protrusion 140 is projected from one end in the longitudinal direction thereof, and the other end is
Two guide pins 137, 13 supporting the control lever 133
Of the eight, which is on the front side and below, is rotatably supported by the portion of the lower one 138 projecting to the right from the long hole 135, and
A substantially middle portion in the longitudinal direction is rotatably connected to a portion of the front end portion of the control lever 133 located on the rear side of the substantially central portion of the long hole 135 in the longitudinal direction via a connecting pin 141.

Therefore, the kick lever 139 is rotated by moving the control lever 133 between the release preparation position and the release position.

142 is a release lever. The release lever 142 is formed in a substantially L shape, and the bending point position of the L shape is rotatably supported by a support pin 143 erected from the chassis 42, and the tip portion of one arm 142a thereof. Is the lock slider
It is positioned so as to abut against the pressed piece 98 of 97 from the rear side, and the tip end of the other arm 142b is positioned so as to intersect the rotation locus of the protrusion 140 of the kick lever 139.
The release lever 142 is urged by a resilient force (not shown) in the counterclockwise direction, and when the control lever 133 is in the release preparation position, the tip of the other arm 142b is moved. The portions are located slightly obliquely rearward and upward of the protrusion 140 of the kick lever 139, with a slight distance therebetween.

Therefore, for example, when the loading ring 68 returns to the non-loading position from the state where the tape is loaded, the control lever 133 pushes the pressed piece 136 of the control lever 133 substantially upward by the pressing protrusion 132 provided on the loading ring 68. As a result, the kick lever 139 is moved from the release preparation position to the release position, so that the kick lever 139 is moved from the position shown by the solid line in FIG. 8 to the position shown by the two-dot chain line in FIG. It is rotated, and at this time, the protrusion 140 of the kick lever 139 kicks the tip end portion of the other arm 142b of the release lever 142 substantially upward.

Therefore, since the release lever 142 is rotated in the counterclockwise direction, the one arm 142a pushes the pressed piece 98 of the lock slider 97 forward, which causes the lock slider 97 to move forward. Will be moved a predetermined amount to.

Then, when the lock slider 97 is moved forward,
As described above, since the lock roller 115 escapes to the position where it does not engage with the claw portion 88a of the locked piece 88 of the cassette holder 79, the lock for the cassette holder 79 is released, and the cassette holder 79 is moved to the eject position. It will be popped up.

Then, as described above, unloading of the tape is performed by operating the eject button 40,
As described above, the lock on the cassette holder 79 is released when the tape unloading is completed. Therefore, unloading the tape and unlocking the cassette holder 79 are
By operating the eject button, it is automatically and sequentially performed.

Incidentally, when the unlocking operation by the unlocking means 131 is performed, the kick lever 139, as shown by the chain double-dashed line in FIG. The contact with the tip of the other arm 142b of 142 is released, and the arm is rotated a little further. Therefore, when the release lever 142 moves the lock slider 97 forward by a predetermined amount, the lock slider 97
Since it does not press 97, the lock slider 97 is moved rearward by the tensile force of the tension spring 108, and the release lever 142 is moved to the lock slider 97 this time.
It will rotate in the clockwise direction.

Further, as described above, in the state where the tape is traveling at high speed (hereinafter, referred to as “high-speed traveling mode”),
The loading rings 68 and 68 'are returned so that they come to a position closer to the loading completion position side from the non-loading position.However, even if the eject button 40 is operated from this high speed running mode, they are returned to the non-loading position. Each lever 133, 139, 14 by loading ring 68
Since 2 operates in the same manner as described above, the lock for the cassette holder 79 is released.

(C-10. Detection means) [FIG. 1, FIG. 3 to FIG. 7, FIG.
0 to FIG. 12] 144, 145 and 146 are detection switches for detecting predetermined detection items, respectively.
45 and 146 are arranged side by side in the vertical direction at the lower end of the portion of the side of the circuit board 43 facing the chassis 42 along the rear edge.

Of these three detection switches 144, 145, and 146, the detection switch for detecting that the lowermost one 144 is locked to the cassette holder 79 (hereinafter referred to as "lock detection switch"). ), And the detection switch (hereinafter, referred to as “instruction content detection switch”) for detecting the instruction content of whether or not the one 145 located in the middle permits the erasing performed on the tape cassette 1. The uppermost one 146 is a detection switch (hereinafter, referred to as "cassette detection switch") for detecting that the tape cassette 1 is mounted in a predetermined cassette mounting position of the recording unit 45. is there.

Reference numeral 147 denotes a base of the lock detection switch 144.
, Two contact pieces 148, 148 'made of a material having spring elasticity are provided so as to protrude toward the right side, and to be positioned apart from each other in the front-rear direction. Contact points at the tips of the surfaces of the 148 'that face each other
148a and 148'a are fixed. Then, the contact piece 148,
The front side 148 of 148 'is located behind the bent portion 103 of the lock slider 97, and
7 is pressed from the front side by the bent portion 103 by moving the lock roller 115 to a position for engaging the locked piece 88 of the cassette holder 79, thereby,
As shown in FIG. 7, two contact pieces 148, 148 'are adapted to come into contact with each other.

Reference numeral 149 denotes a base of the instruction content detection switch 145, which is made of a material having spring elasticity from the base 149.
The contact pieces 150 and 151 are projected to the right side. The front one 150 of the two contact pieces 150, 151 is bent at a substantially right angle from the base of the base 149 to the right, from a contact portion 150a extending substantially vertically, and from the tip of the contact portion 150a to the rear. The contact portion 150a and the rear contact piece 151 are separated from each other in the front-rear direction by a slight distance from each other. Also, the front contact piece
Contact points 152 and 153 are fixed to the tip portions of the contact portions 150a of the 150 and the contact pieces 151 on the rear side on the surfaces facing each other.

The cassette detection switch 146 is the instruction content detection switch 1
Since it has substantially the same structure as 45, the cassette detection switch 146 has an instruction content detection switch 145
The description is omitted by assigning the reference numeral with the symbol "'" to the reference numeral attached to each part of.

154 and 155 are detection pins, and these detection pins 154, 155
The lower one 154 is the instruction content detection pin, and the upper one 155 is the cassette detection pin. The detection pins 154 and 155 are located in the chassis 42 at positions corresponding respectively to the tips of the pressed portions 150b and 150b 'of the contact pieces 150 and 150' on the front side of the instruction content detection switch 145 and the cassette detection switch 146. The stoppers 154a and 155a each having a substantially disk shape are formed at the left end portion thereof. And
These detection pins 154, 155 are inserted from the left side in guide sleeves 156, 157 provided in the chassis 42 so as to penetrate them in the plate thickness direction, and their stoppers 154a, 155a.
The tip ends of the pressed portions 150b, 150b 'of the front contact pieces 150, 150' of the detection switches 145, 146 corresponding to these are elastically abutted from the left side.

Therefore, the detection pins 154 and 155 are the contact pieces 15 of the detection switch.
Being biased to the right side by being pressed by 0, 150 ', and being held at a position where the stoppers 154a, 155a contact the left end surfaces of the guide sleeves 156, 157 when not pressed from the right side. become. In this state, the tips of the detection pins 154 and 155 are located at positions slightly closer to the right side than the tips of the cassette positioning pins 60, 60 'and 61, 61'.

Therefore, the cassette holder 79 is attached to the tape cassette 1
When the cassette detection pin 155 is locked in the second position in a state where the cassette is inserted, the cassette detection pin 155 closes the left one 24 of the two holes 24, 25 formed in the bottom plate of the cassette case 2. Since it is pressed from the right side by 26, it will be moved to the left side. As a result, the tip end of the pressed portion 150b 'of the contact piece 150' of the cassette detection switch 146 is pressed to the left, so that the contact piece 150 'and the rear contact piece 151'.
And are brought into contact with each other, and a predetermined signal is output. Then, it is detected that the tape cassette 1 is mounted in the predetermined cassette mounting position.

Further, when an instruction to prohibit erasing is given to the tape cassette 1, that is, when the status indicator 18 provided on the tape cassette 1 is at the erasing prohibited position, the tape cassette 1 is formed on the cassette case 2. Since the right one 25 of the formed holes 24 and 25 is not closed, when the tape cassette 1 is mounted in the cassette mounting position, the tip end portion of the instruction content detection pin 154 is as shown in FIGS. As shown
It will be inserted into the cassette case 2 through the hole 25. Therefore, in this case, the instruction content detection switch 145
Since the two contact pieces 150 and 151 are not contacted with each other, a predetermined signal is not output. That is, it is detected that the tape cassette 1 is instructed to be erased.

However, if the tape cassette 1 is instructed to permit erasing, that is, if the status indicator 18 is in the erasing allowable position, the hole in the cassette case 2 is
Since 25 is closed by the base portion 18a of the state indicator 18, when the tape cassette 1 is mounted in the cassette mounting position, the instruction content detection pin 154 is pressed from the right side by the state indicator 18 and moves to the left side. Will be done. As a result, the tip of the pressed portion 150b of the contact piece 150 of the instruction content detection switch 145 is pressed to the left,
The 150 and the rear contact piece 151 are brought into contact with each other, and a predetermined signal is output. Then, it is detected that the tape cassette 1 is instructed to be erased.

The tape loading by the tape loading mechanism is started, for example, on condition that a predetermined signal is output from all the detection switches 144, 145 and 146.

(D. Operation) The operation of each unit by the video camera 28 configured as described above is performed as follows. It is assumed that the tape cassette 1 to be used is instructed to permit erasing.

(D-1. Mounting of tape cassette) First, in order to mount the tape cassette 1, it is necessary to move the cassette holder 79 to the first position.

Therefore, the eject button 40 is operated to unlock the cassette holder 79.

The lock release member (not shown) operated by operating the eject button 40 is used to release the lock from the state where the tape cassette 1 is not inserted.
This is done by pushing 97 forward.

As a result, the cassette holder 79 pops up from the second position to the eject position.

Then, for example, the cassette holder 79 is moved to the first position by pulling the rear end portion of the lid body 31 to the right side with a fingertip. However, the above-mentioned pulling force causes the cassette holder 79 to move to the intermediate position. All you have to do is add. That is, as described above, when the cassette holder 79 is closer to the eject position than the intermediate position, the turning force in the closing direction is urged, so that the lid 31 or the like is pulled to the right during this period. Although it is necessary to do it, when the cassette holder 79 passes the intermediate position, the turning force in the opening direction is urged this time, so the cassette holder 79 is a lid body.
This is because even if 31 and the like are not pulled rightward, they are moved to the first position by the turning force of the toggle mechanism 120.

When the cassette holder 79 is in the second position, the tape cassette 1 is inserted therein. This insertion is performed from the front lid 15 side of the tape cassette 1 until the cassette case 2 contacts the stoppers 87, 87 'provided on the cassette holder 79.

Then, when the tape cassette 1 is inserted into the cassette holder 79, the lock with respect to the front lid 15 is released by the lid lock release protrusion 89 provided in the cassette holder 79, and the tape cassette 1 reaches a predetermined insertion position. The inserted state is elastically held by the cassette retainers 92 and 92 '.

After inserting the tape cassette 1 in this way, the cassette holder 79 is moved to the chassis 42 side by pressing the lid 31 from the right side, for example. In this case as well, the pressing of the lid 31 or the like is required until the cassette holder 79 passes the intermediate position described above, but after passing the intermediate position, the cassette holder 79 is given by the toggle mechanism 120. It is automatically moved to the eject position by the turning force in the closing direction.

Therefore, the lid 31 is further pressed to move the cassette holder 79 to the second position.
Cassette holder 79
Is locked in the second position by the locking means 96 as described above.

When the tape cassette 1 is loaded in the cassette loading position, the front lid 15 thereof is pushed to the right side by the lid raising 63 protruding from the chassis 42, so that it can be moved to the open position. And the reel brake
Since the lower surface of 16 is also pressed by the brake release pin 62 protruding from the chassis 42, the arms 16a and 16b are retracted to positions where they do not engage with the tape reels 8 and 9. Therefore, when the tape cassette 1 is mounted in the cassette mounting position, the front cover 15 is opened and the brakes for the tape reels 8 and 9 are released.

Further, when the tape cassette 1 is mounted in the cassette mounting portion, the engaging shafts of the reel stands 50, 51 provided in the recording portion 45 cause the reel hubs 10 of the tape reels 8 and 9 of the tape cassette 1 to move.
The S-side reel stand 50 and the S-reel 8, and the T-side reel stand 51 and the T-reel 9 are engaged with each other by engaging holes (not shown) formed in 10 '. , Are in a state of being respectively integrally rotated.

(D-2. Detection) In this way, when the cassette holder 79 with the tape cassette 1 inserted is locked at the second position, the tape cassette 1 is moved to the predetermined cassette mounting position in the recording section 45. As described above, the lock slider 97 is attached to the two contact pieces 1 of the lock detection switch 144.
Since the 48 and 148 'are brought into contact with each other, the lock detection switch 1
A predetermined signal is output from 44.

Further, as described above, since the instruction content detection pin 154 and the cassette detection pin 155 are pressed by the cassette case 2, two instruction pieces 150, 151 and 150 'of the instruction content detection switch 145 and the cassette detection switch 146 are provided. Since 151 'is brought into contact, these detection switches 145 and 146
Also outputs a predetermined signal.

(D-3. Tape loading) When the tape cassette 1 is loaded in the cassette loading position,
As shown in FIG. 1, tape loading posts 77, 78
77 'and 78', the high speed tape guides 64 and 64 ', and the pinch roller 58 and the ten pin pin 59 are also located in the tape pull-out recess 5 formed in the front surface of the cassette case 2.

Then, when a predetermined signal is output from the three detection switches 144, 145 and 146, the loading motor 70 is rotated in a predetermined direction, whereby the loading ring 68,
68 'will be rotated in the loading direction.

Therefore, since the loading blocks 76 and 76 'are moved to the positions shown by the two-dot chain line in FIG. 1 and the solid lines in FIG. 8, the magnetic tape 14 is pulled out from the cassette case 2. Has tape loading posts 77, 7
It is pulled out from the cassette case 2 by being pulled by 8, 77 ', 78'.

Further, as the magnetic tape 14 is pulled out in this manner, at the same time, the pinch roller 58 and the ten-legged pin 59 are moved to the positions shown in FIG.

Then, the magnetic tape 14 is passed through the tape path shown by the thick double-dotted line in FIG.

Then, when the tape loading is performed in this manner, the pressing protrusion 132 provided on the right loading ring 68 is moved forward, so that the control lever 133 held in the release position by the pressing protrusion 132 is moved. It will be moved to the release preparation position by the elastic means (not shown). When the control lever 133 is moved to the release preparation position in this way, the kick lever 139 is released by the release lever 142.
The other arm 142b of is to be kicked slightly downward,
As a result, the release lever 142 is rotated in the clockwise direction, but the rotation has no effect on the lock slider 97, and the release lever 142 is also operated by the elastic force of the elastic means (not shown). Is returned to the state of.

(D-4. Shooting) When shooting, a hand clip of the video camera 28
The photographing button 36 provided at 34 is pressed. As a result, the head drum 46 is rotated and the magnetic tape 14 loaded as described above is made to run at a constant speed by the capstan 57 and the pinch roller 58, and the image captured by the photographing lens 32 is a solid-state image sensor. After being converted into an electric signal by a recording medium or the like, it is converted into a predetermined video signal by a recording circuit (not shown) and magnetically recorded on the magnetic tape 14 via the recording magnetic head 47. Further, the sound captured by the microphone 33 is also supplied to a recording head 49 via a recording circuit (not shown) and recorded on the magnetic tape 14 via the head 49.

When the magnetic tape 14 is fast-forwarded or rewound, that is, the magnetic tape 14 runs at high speed, the loaded magnetic tape 14 is temporarily unloaded, that is, wound into the cassette case 2, and the high-speed tape guide 64 is used. , 6
As shown in FIG. 9, 4'is rotated in such a manner that its rotating end portion is located between the in-cassette guides 13 and 13 'and the magnetic tape 14. Then, in this case, the loading rings 68, 68 'are returned to the positions closer to the slightly completed loading position side than the non-loading position.

(D-5. Eject) When the required shooting is completed, the eject button 40 is operated.

As a result, the magnetic tape 14 pulled out from the cassette case 2 is unloaded. Therefore,
The loading rings 68 and 68 'are returned to the non-loading positions, and the magnetic tape 14 that has been pulled out is wound around the S reel 8 or the T reel 9.

Then, when the loading rings 68, 68 'return to the non-loading position, the pressing protrusion 132 provided on the right loading ring 68 moves the pressed piece 136 of the control lever 133 upward to the release preparation position. Since it is pushed toward, the control lever 133 is moved to the release position, and
The kick lever 139 rotates the release lever 142 counterclockwise, and the release lever 142 further pushes the lock slider 97 forward. As a result, the lock for the cassette holder 79 is released, and the cassette holder 79 is popped up to the eject position by the toggle mechanism 120.

(D-6. Removal of Tape Cassette) Then, the cassette holder 79 is moved to the first position in the same manner as described in the item d-1. At this time, since the front lid 15 of the tape cassette 1 is released from the pressing force of the lid raising 63, it is returned to the closed position. Also, since the reel brake is also released from the pressing force by the brake release pin 62, its arms 16a, 1
6b is advanced to a position where it engages with the tape reels 8 and 9.

When the tape cassette 1 is pulled out from the cassette holder 79, the lid lock release protrusion 89 provided on the cassette holder 79 releases the pressure on the lock member (not shown) that locks the front lid 15 at the closed position. 15 will be locked in its closed position.

After the tape cassette 1 is taken out, the lid 31 is pressed to return the cassette holder 79 to the second position and lock it at this position.

(G. Effects of the Invention) As is clear from the above description, the video camera of the present invention has an image pickup section having a photographing lens, a grip section for supporting the main body section at an image pickup position, and a magnetic tape. A recording / reproducing unit provided with a mechanism necessary for recording and / or reproducing, a first position at which a tape cassette can be inserted and removed, and a tape cassette are mounted in a cassette mounting position of the recording / reproducing unit. A cassette holding member, which is rotatably supported by a pivot shaft extending vertically with respect to the main body so as to move between the second position and the second position, and locks the cassette holding member in the second position. Locking means, detecting means for detecting that the cassette holding member has reached the second position, and pulling out the tape from the tape cassette mounted in the recording / reproducing section after the detection is made. Further, a tape loading mechanism that allows the tape to pass through a predetermined tape path, an eject switch that causes the tape loading mechanism to unload the tape, and a lock by the locking means when the tape unloading is completed. A lock releasing means for releasing and a tape cassette which faces the outside from the cassette insertion opening of the cassette holding member which is close to the first position side from the second position when the lock by the locking means is released. Of the cassette holding member is moved to an eject position where it is prevented from falling off by the slip-out preventing piece and is held at the eject position, and the cassette holding member is located at a position substantially midway between the eject position and the first position. If this is on the side, attach this to the eject position side. Vital cassette holding member, characterized in that and a toggle mechanism for biasing it to the first position side when coming to the first position side than the position of the intermediate.

Therefore, according to the present invention, by releasing the lock of the cassette holding member, the cassette holding member is automatically separated from the eject position, that is, the cassette mounting position of the recording / reproducing unit, but the insertion and removal of the tape cassette with respect to the cassette holding member are still impossible. The tape cassette will be moved to a position where it cannot be held, and the tape cassette will be prevented from falling off, and the orientation of the video camera when ejecting will be changed. Even if there is, the tape cassette will not jump out of the cassette holding member as soon as it is ejected.

Moreover, the cassette holding member has the first position and the second position.
When the position is closer to the first position than the position approximately halfway between the position and the first position, the first position is biased, so that the first position is stable. Will be retained.

Then, the elastic force of the elastic member provided in the toggle mechanism in the present invention is increased while the cassette holding member is moved from the first position to the intermediate position, but from the intermediate position to the second position. It will be reduced during movement to the eject position close to the position, and will be slightly increased during movement from the eject position to the second position. Therefore, the cassette holding member moves from the first position to the second position.
The amount of increase in the elastic force of the elastic member, which is increased while the elastic member is moved to the position, is approximately half of the amount of increase in the elastic force of the elastic member used for the conventional pop-up type cassette holding member. It can be suppressed to a small amount. That is, the maximum elastic force of the elastic member can be suppressed to about half.
As a result, since the strength of the cassette holding member can be weakened accordingly, the weight of the cassette holding member can be reduced and the cassette holding member can be moved to the second position with a small pressing force. be able to.

[Brief description of drawings]

The drawings show an example of the embodiment of the video camera of the present invention. FIG. 1 is a right side view of the video camera, and FIG. 2 is a video camera in the state where the cassette holding member is in the first position. FIG. 3 is a perspective view showing a tape cassette used, FIG. 3 is an enlarged perspective view showing a main part of the video camera when the cassette holder is in the first position, and FIG. 4 is a cassette holder locking mechanism and a detection switch. FIG. 5 is an enlarged plan view of an essential part of the video camera when the cassette holder is at the first position, and FIG. 6 is an enlarged view of the cassette holder at the eject position. Main part enlarged plan view of the video camera in the state,
FIG. 7 is an enlarged plan view of an essential part of the video camera when the cassette holder is in the second position, FIG. 8 is a right side view of the essential part for showing the movement of the unlocking means, and FIG. FIG. 10 is a right side view of a main part showing a main part of the video camera and a part of the tape cassette in a high-speed running state, FIG. 10 is an enlarged perspective view showing one of the detection switches, and FIG. FIG. 12 is an enlarged plan view of an essential part for showing, and FIG. 12 is an enlarged rear view of an essential part for showing the movement of the detecting means.
The figure shows a tape cassette, FIG. 13 is an exploded perspective view, and FIG. 14 is an enlarged plan view of essential parts. Explanation of code 1 …… Tape cassette, 14 …… Magnetic tape, 28 …… Video camera, 29 …… Main body, 32 …… Shooting lens, 34 ……
Grip part, 40 ... Eject switch, 45 ... Recording (playback) part, 68, 76, 77, 78, 76 ', 77', 78 '... Tape loading mechanism, 79 ... Cassette holding member, 83,
83 '... Rotating support shaft, 96 ... Locking means, 130,130' ...
Removal prevention piece, 120 ... Toggle mechanism, 131 ... Lock release means, 146, 155 ... Detection means

Claims (1)

[Claims] 1. A recording / reproducing section provided with an imaging section having a photographing lens, a grip section for supporting a main body section at an imaging position, and a mechanism necessary for recording and / or reproducing on a magnetic tape. And a vertical direction with respect to the main body so as to move between a first position at which the tape cassette can be inserted and removed and a second position at which the tape cassette can be mounted at the cassette mounting position of the recording / reproducing unit. A cassette holding member that is rotatably supported by a rotation support shaft that extends to a position, locking means that locks the cassette holding member to the second position, and detection that the cassette holding member has reached the second position. And a tape loader for pulling out the tape from the tape cassette mounted in the recording / reproducing unit after the above detection and allowing the tape to pass through a predetermined tape path. Mechanism, an eject switch for causing the tape loading mechanism to unload the tape, a lock release means for releasing the lock by the lock means when the tape unloading is completed, and a lock for the lock means. When the cassette holding member is moved from the second position toward the first position, the tape cassette exposed from the cassette insertion opening of the cassette holding member is prevented from falling off by the removal preventing piece. The cassette holding member to the eject position side when the cassette holding member is closer to the eject position than a position approximately midway between the eject position and the first position. And the cassette holding member is closer to the first position than the intermediate position. Video camera when it is coming in, characterized in that it and a toggle mechanism for biasing it to the first position side