JPS59113566A - Guide mechanism of video tape recorder - Google Patents

Abstract

PURPOSE:To realize a micro VTR, by providing the first guide means which prescribes the path for movement of a tape guide, and the second guide means which is provided to the circumferential face of a guide cylinder as one body, and guides the connection point of the first and the second links. CONSTITUTION:A leading guide block 18 is arranged turnably on a slider, and a tape guide 18a and an inclined pin 18b inclined toward this tape guide are provided on this block 18. The guide block and the slider are connected by a connecting pin 18c, and the connecting pin is projected downward and is engaged with a guide groove. The tape guide is projected downward through the leading guide block and is engaged with the guide groove. A pair of projecting pins 13a and 13a are provided under the other end of the first loading link, and they are engaged with notches 21a and 21a of a pair of U-shaped guides 21 and 21 in the unloading state. Since the guide means which guides the connection point of links is provided on the circumferential face of the guide cylinder as one body, the guide means does not put restrictions on spaces of other mechanisms.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention is a VTR suitable for ultra-compact VTR such as 8mm video.
Regarding the guide mechanism.

〉Prior art〉Loading mechanism in conventional VTR +-1 knee pattern
A pair of links were connected to the loading arm of the machine, and a pair of tube guides were attached to the links, and loading and unloading were performed by rotation of the loading arm.

However, in recent years, the downsizing of VTRs has progressed, and a new standard called 8mm video has been released. With the conventional β method, VH5 force method, etc. (the tape winding of the YoJJ guide cylinder was angle C-1: approx. The corner is 210@.

Therefore, with 8mm video, it is necessary to move the tape guide from the inside of the force/throttle notch to the inside/recess of the gas/r/d cylinder. Therefore, it was very difficult to use the conventional Ll-ting mechanism.For this reason, it was considered that the link between the loading arm and the tape guide should be constructed with multiple 1)〉・-C, to make the loading arm longer. However, if this link is rubbed multiple times, a guide means is required to restrict the movement of the connecting points of the links so that the links do not become bent during mouthing. .

However, in the first ultra-compact VTR, it was extremely difficult to install a new guide means in terms of space.

The invention has been made in view of the above points, and provides a guide mechanism for a video cheap platform that does not require much space for the guide means even if the loading means is composed of a plurality of glues. It provides:

(d) Structure The present invention involves pulling out an i-p from a cartridge and winding it at a predetermined angle on a guide cylinder. a pair of first links connected to the loading arm, a pair of second links connected to the first link, a tape guide connected to the second link, and a moving path of the tape guide. A guide mechanism for a video tape recorder comprising a first kite means defined in the above-mentioned definition, and a second guide means provided integrally on the circumferential surface of the guide cylinder and guiding a connection point between the first and second slides. .

(e) Examples An embodiment of the present invention will be described below with reference to the drawings.

The mechanism of this embodiment can be roughly divided into a loading mechanism and a mode setting mechanism.

First, the steering mechanism will be explained. Figure 1 shows the loading mechanism in eject mode.
The second reason is Playmo 1! It is the same one law surface diagram on the left.

The guide cylinder (1) is installed at an angle of -' and (2) -L, and a part of sliding means (described later) is installed on the lower side of the guide cylinder during Ll-ding. A guide protrusion (3) for guiding is arranged integrally.

In addition, a pair of first drawer arms <5) (5) are rotatably attached to the left and right pair of first support shafts (4) (4>), and a pair of first drawer arms <5) (5) are rotatably attached to the left and right pair of first support shafts (4) (4>). 1 extraction pins (6) (6) are arranged. This first pull-out pin is located in a notch (7a) formed in the cassette (7) in the eject mode, and when the tape (8) is pulled out, the first pull-out arm is rotated by 90 degrees, and the tape (8) is rotated by 90 degrees. ) to the outside of the cassette 1-(Z).

A second support shaft (9) is arranged near the first support shaft on the left side, and a second pull-out pin (10) is attached to the tip of this second support shaft.
) is pivotally supported on the second drawer arm (dan〉).

This second pull-out pin is also located within the notch in the eject mode and stop mode.

A pair of loading arms (12) (12>) are disposed coaxially with the first support shaft, and a tenth loading link (13) (13) is disposed at the tip of the loading arm.
) is connected to the center of the A pair of second [7-ding links (14)
<14) is connected to one end, and a pair of left and right sliders (16) (16) are attached to the other end of this 20th bearing via connecting pins (15) (15). This connection pin protrudes downward through the 20th bearing link, and is connected to a pair of guide grooves (1) formed in a guard plate (17) disposed on the chassis.
7a) (17a), and is slidable between the unloading position and the loading position.

Further, on the left slider, as shown in FIG.
L is provided with a T-blade guide (18a) and an inclined pin (18b) 7) which is inclined in the direction of this tape guide. Also, the guide lock and slider are connected to a connecting bin (1
8c), and the connecting pin protrudes +15 and engages the kite groove. Furthermore, the inner IJ Koji tape guide is in front! It protrudes downward through the self-leading guide block and engages with the guide groove.

A leading guide block (1) is similarly placed on the right side slider (1) through a connecting pin (19c), and a tilting pin (1) is placed against the tape kite (19a).
The direction of inclination in 9b) is opposite to that on the left.

A fixing block (20>(20) for fixing the pair of tape kites at the [coach f>/g complete position) is arranged on the guy guide plate section vij.

Further, a pair of protruding pins (13aH13a) are provided below the other end of the first L-]-ting link, and these protruding pins are connected to a pair of U-shaped guides (21> (21) Notch (21a)
(21a). And, on the open end side of this notch, there is a wire-like kite rod (22) that has elasticity.
22) is arranged, and when the tape is pulled out, the notch (21a
) Continuing to (21a), the protruding pin is guided and the protruding pin is guided into the notch when stored. Furthermore, l]? A trapezoidal guide (23><2
Three pins are arranged continuously to the kite rod (22) <22> to guide the protruding pin. Further, a pair of rotating pieces (25) and (26) are disposed near the trapezoidal guide, respectively, which are pivotally supported on the second and third support shafts (24), and each has a torsion spring ( 27) (27>) is biased in the direction of pressure contact with the trapezoidal guide. Then, when the loading is completed, the protruding pin contacts the rotating piece 1iii and rotates a little ri, and the above-mentioned The tape guide is pressed against the fixing block 011 by the biasing force of the torsion spring.

The second drawer arm and the left side opening arm are connected by a connecting lever (lla).

The hack-tension sensor (average) is rotatably supported on the fourth support shaft (29) and has a detection pin (28a) at one end.
is arranged, and a spring (30) which applies force to the tape (8) by applying force in the counterclockwise t1 direction is placed on one of the other ends, and a brake hold is placed on the other of the other ends. One end of <31> has been identified. This brake belt is wound around the boob on the supply side of the supply and take-up reel 6 (32) (33>), and the other end is fixed to the boob (2). Rotation of the rear 7 in the counterclockwise direction 51 is restricted by one end of the first drawer arm.

No. 111 The supply ship and the take-up reel stand are driven by a reel stand drive mechanism. This reel stand drive mechanism consists of a reel sweater (34), a drive gear (35) disposed on the drive shaft of this reel motor, and an intermediate gear (36) meshing with this drive gear.
It is composed of an idler lever (37) arranged coaxially with the intermediate gear and rotatable, and an idler lever 38) arranged on the idler lever and always meshing with the intermediate gear. Since there are no special features, a detailed explanation will be omitted.

Further, each of the reel stands is provided with a brake lever having a brake shoe (39a) (39a) at one end, respectively.
η) are arranged close to each other, and this brake lever is configured to be controlled by a brake release lever (40) (40), which will be described later.

On the other hand, a pinch roller (42) is placed on one end of the pinch roller lever (41) which is pivotally supported on the fifth support shaft (24), and this pinch roller can be pressed against the Kihe Bustan (43). At the other end of the pinch roller lever, an engaging bit (44) protrudes through an arcuate notch (2a) of the shihe-shi(?), which will be described later. Controlled by a mechanism.

Incidentally, the cassette 11j can be raised and lowered by a cassette bolt mechanism (not shown), and is positioned by cassette positioning pins (45>(45) (46>(46)) when installed.

Next, the operation of the above-mentioned loading mechanism will be explained with reference to FIGS. 1, 4, and 5.

First, the eject mode will be explained. cassette(
7) into a cassette holder (not shown) and push the force holder to a predetermined position, the cassette holder is opened and the cassette throat is attached to the positioning pin (
45)<45)(46)(46) It is positioned at a predetermined position. In this state, as shown in FIG. 1, the first pull-out pin (6) (6'
), a second pull-out pin (10), leading guide blocks (18) (19), and a pinch roller (42) are located.

In addition, the connection points of the 10th to 20th deing links (13) (13) and the 20th deing links (14) (14) are bent, and the protruding pins (13a) of the 10th buoy zeta link in nII ( 13a) are U-shaped guides (
zx>m) is engaged in the notch (21a) (21a>). Also, in this state, the Ruki lever (η)
The brake state is released by the brake release pins (40) (40).

Previous: Force distribution set I. When installed in a specified position, it will be applied with force.
- The detection swing (not shown) is activated, and the rope C leg motor, which will be described later, is energized. Due to this energization, the first drawer arm (5) (5) is centered around the first support shaft (4').
As shown in FIG.
Rotate. As a result, the 10th pulling operation is performed and the tape (8) is pulled out by the first pull-out pins (6) (6), resulting in a stop mode.In the stop mode, the brake To move the release pin downward from the position shown in Figure 1, press the brake shoe (3).
9a) (39a) is the supply and take-up reel stand (32) (3
3) is engaged with the boob. Note that in this mode, the tape <8> is not in contact with the guide cylinder (1) and the cassette case.

In this stop mode, when fast forwarding and rewinding operations are performed, the tape (8) is run in this state. Note that at this time, the brake lever is released.

Next, when you perform a playback operation from stop mode, one leading guide (18x19) pulls out the tape (8),
A 20th winding motion is performed which wraps around the guide cylinder (1) by approximately 210 degrees.

This operation will be explained in detail regarding the right side loading mechanism. First, the loading arm (12) rotates clockwise. This rotation causes the first Ll loading link (13
) is a protruding pin (13a) that engages with the U-shaped guide (■)
Rotate clockwise around the 2nd U-ding (1
4) Push up to the top of the first line. Therefore, the guide groove (
The connecting pin (15) and the end of the tape kite (19a) that engage with the tape kite (17a) move from the bottom to the top in the figure along this guide groove while pulling out the tape (8), and the leading guide bar 1 conc. ) pulls out the tape (8). When the rotating arm further rotates, the protruding pin escapes from the notch (21a) of the U-shaped guide, comes into contact with the guide bar 22), and is guided for a short period of time. Further v
When the loading arm (ii) rotates V, the protruding pin (vII) separates from the guide rod and is guided into engagement with the trapezoidal blade 23). Furthermore, the connection point of the first and second U-ring links (13) <14> is engaged with and guided by the protrusion. By restricting one of them at the same time, the 1st and 2nd links in 01j will not bend each other, and the driving force of the rotating arm in 111f will be transmitted to the leading guard 1b. belongs to.

Then, the leading kite block is set to the fixed block 2.
0), the protruding pin moves away from the trapezoidal guide force and comes into contact with the rotating piece (26), which is biased by the torsion spring (27). At the same time, the connection point is moved away from the guide protrusion i11. Further, when the leading guide block reaches the end of the guide groove (17a) and the T-shaped guide (19a) and the inclined pin (19b) engage with the fixed block as shown in FIG.
, stops rotating. In this state, the 11th J-ding link is urged to rotate in the clockwise direction by the rotating piece, so the leading guide knob U knob is pressed against the fixed block side and is fixed in position. <8) The winding angle to the kite cylinder (1) is accurately defined.

Meanwhile, in conjunction with the rotation of the rotating arm, the pinch [Nora arm (41)] also rotates clockwise, and after the leading guide lock comes into contact with the fixed block, the pinch roller (42) (43), the play mode is set, and the playback operation is performed continuously.

In addition, the second drawer arm (11) has a connecting lever <1 la
) is connected to the left loading arm (12)
The tape (8) is rotated to the position shown in FIG. 4 in conjunction with the rotation of 1.1 and the tape (8) is mounted on the horizontal detection pin (28a).

Next, if you perform a recording operation from the stop mode,
The 20th tying is performed in the same way as during the playback operation, but even after the 2nd L+ ting is completed, the pinch roller arm remains in a position that keeps the bimb roller and capstan separated. It has stopped and is in recording standby mode. When a pause release operation is performed from this recording standby mode, the pinch []-ra (42) presses against the Kihe Pusukun (43), resulting in the state shown in FIG. 5, and the recording mode is entered.

Also, when the stop operation is performed from the recording or endogenous mode, the operation is completely opposite to the second U-ting operation described in 111, and the a-1:, 1-seeking operation is performed and the operation returns to the stop/write mode shown in Fig. 4. Become. Furthermore, when the eject operation is performed from this stomb mode, the cassette boulder is unloaded in an operation completely opposite to the 10th to teing operations, resulting in the eject shade shown in FIG. 1, and the cassette boulder is amplified continuously.

Next, a mode setting mechanism that drives the aforementioned loading mechanism and also performs mode setting will be described.

FIG. 6 is a plan view of the mode setting mechanism in the play mode, and FIG. 7 is a right sectional view of the same, and the mode setting mechanism is arranged on the lower surface of the yarn (2). A seven-tag gear (101) connected to a loading motor (100) meshes with a loading gear (102a) arranged on the outer periphery. This engine setting cam is pivotally supported by a fifth support shaft (103) protruding from the bottom surface of the engine, and in addition to the rotating gear, a brake cam (102b) that controls the brake lever; Spiral-cut l-l-ding arm drive cam (10
2c), a first drawer armoire, a drive cam C102d), and a υbinteloshi cam (i02e).

A fan-shaped gear (around U) is pivotally supported on the sixth support shaft (104), and an engagement pin (105a) disposed on this fan-shaped gear engages with the aforementioned 7-tay/g arm drive cam. In addition, the first intermediate gear (106) is the fan-shaped gear 1 and -.
1 fa is spoiled. The first intermediate gear 5'- is pivotally supported by a seventh support shaft (107>(107) of -2=1), and a pair of second intermediate gears meshing with each other are mounted on this seventh support shaft. (1
Zero illusion (108) is supported. The first intermediate gear and one of the second intermediate gears are integral with each other.

A pair of gear hooks (□↓-922) (↓022) are provided coaxially with the pair of first support shafts (4) (4) and on the lower surface of the shaft as shown in Fig. 7. are arranged. A cylindrical boss (109a) is formed at the center of this gear hook, and this boss bears the first support shaft inwardly, and a first driven gear (110) outwardly. The first driven gear is integrally connected to the rope input gear t, and meshes with the second intermediate gear.

On the other hand, a second driven gear (111) is integrally coupled to the right first support shaft together with the first pull-out arm.

This second driven gear is formed with a missing portion (IHa) where the tooth Hi (of the second driven gear) is missing at a position, and is capable of meshing with the loading gear.

In addition, a pair of boilers (±>(1
13) are connected, and both foils are connected to a continuous shaft (1
14). Part of the right side foil (stop) is missing, and Li? A rotation regulating pin (i15) set up on the lower surface of the gear box r regulates the rotation position of the first drawer arm when it is pulled out.

Further, an engagement pin (112a) is arranged on the right side boiler, and can be engaged with the first drawer arm drive cam. Further, the left foil (113) is biased counterclockwise by a spring (not shown), and therefore the right foil is biased in the o'clock 5f direction.

Further, a rotatable brake control lever (116) is engaged with the brake cam No. 111, and this brake control lever is engaged with a slide lever bar (117) on which the brake release pin is arranged.し=C exists. This slide lever is formed with through holes (117a) (117b),
Loose fitting pin (118) (1
19) are loosely fitted into each other, and can be slid by rotating the brake control lever.

Next, the operation of the mode setting mechanism described above will be explained according to FIGS. 6, 8, and 9IyJ.

As shown in FIG. 8, the mode setting cam (outer) sets each mode by rotating within a range of 10° to 270' starting from the eject mode.

First, in the eject mode, as shown in FIG. 8, the first drawer arm (5> and loading arm <12) are in the retracted state. Further, the brake control bar (116) is engaged with the outer periphery of the brake cam (102b), and the brake on the reel stand is released.

Next, with the cassette installed, the rotating motor (100
) is turned off and the mode setting cam rotates counterclockwise from the eject mode position. Due to this rotation, the second driven gear (Ys,
) rotates clockwise, and the first drawer arm (5) rotates clockwise while pulling out the tape and performing the 10-daying. When the second driven gear rotates to a predetermined position, the loading gear faces the cutout (lla) of the second driven gear 011, so that it can be fully engaged or disengaged.

However, since the foil (±) is biased clockwise as described above, the first drawer arm rotates continuously and stops when the foil engages with the rotation regulating pin.

Further, when the mode setting cam rotates 75 degrees from the eject position, the loading motor stops and the mode becomes a stop mode as shown in FIG. In this state, the brake control lever rotates counterclockwise to engage with the recess of the brake cam, thereby pressing the brake lever (39) against the reel stand. In addition, in this state, the diameter of the I cope 4 ring arm drive cup (102c) is the same as in the escape T mode, so the fan-shaped gap (around ■) is not attached, and the rope swing arm drive cup 12) is still in the stored state. .

In this stop mode, the mode setting cam is rotated by 30° clockwise, that is, in the eject mode direction, when C is used for fast forwarding and rewinding operations.

Therefore, the brake control lever rides on the outer periphery of the brake cam and rotates clockwise, so that the brake of the reel stand is released.

Furthermore, in order to perform a recording operation in the ST. Due to this rotation, the diameter of the loading arm drive cam is continuously reduced, and the fan-shaped gear n1j rotates clockwise.

Therefore, since the first and second intermediate cans (108) rotate counterclockwise in the g1 direction, the first driven gear (110) and the loading arm (12) rotate clockwise, and Further, the brake applied to the reel stand is released by the rotation of the mode setting cam.

In this recording standby mode, a pinch roller cam, which will be described later, keeps the pinch roller and Kihe Pusukun close to each other or kept separated from each other.

Further, when a pause release operation is performed in this recording standby mode, the mode setting cam is further rotated by 45 degrees counterclockwise to enter the Kepley mode as shown in FIG. Furthermore, this 45
During rotation, the diameter of the loading drive cam does not change, so the position of the loading arm does not change.

Further, when a playback operation is performed in the store mode, the mode setting cam does not stop in the recording standby mode but continuously rotates to the play mode position.

Also, before! When the eject operation is performed while in the stop mode, the mode setting cam rotates clockwise. At this time, the first drawer arm drive cam (102a) engages with the engagement pin (112a) provided on the wheel (112), and together with this wheel, the second driven gear is moved counterclockwise.
＼Let the Major General rotate. Therefore, the [1-ding gear (102a) of the mode setting cam meshes with the second driven gear, and the first drawer arm is in the retracted state as shown in FIG. 8. In addition, from 1iii play mode...
The unloading operation to knob mode is the exact opposite of the 21st J-ting operation.

Next, the bina UJ-RA pressure viewing operation will be explained.

Fig. 10 is a perspective view of the via frJ-ra crimping mechanism, Fig. 11
Figures 1 to 13 illustrate the operation of the pinch roller crimping mechanism in the stop mode, recording standby mode, and play mode, respectively, and the engagement pin (44) of the pinch roller (41) is connected to the chassis (2). It is loosely fitted into the through hole (120a) of the pinch roller pressure lever (art) through the notch. This pinch roller presses the 8th support shaft (121
) is pivoted to the return lever (122) counterclockwise (=J is pushed out).An engagement lever (123) is also pivoted to this eighth support shaft, and is used for pinching. It can be engaged with the roller cam (102e).The bin roller pressure lever and the engagement lever are biased in opposite directions by a pressure spring (124).

As shown in FIG. 11, in the stop mode, the pinch roller cam (102e) is engaged with the bar (123), and the pinch roller cam (41) is engaged with the return spring (41).
122), it is in the return position.

Then, as shown in FIG. 12, in the recording standby mode, by rotating the mode setting cam counterclockwise, the
Since the IitIit register engages with the Rif pinch U-ra cam and rotates clockwise, the pinch Ul-ra approaches the cab stan (43).

Further, as shown in FIG. 13, in the play mode, the engagement lever engages with the maximum diameter portion of the pinch roller cup, so the pinch roller comes into contact with the outermost part. At this time, the engaging lever Ait is rotated with respect to the pinch roller pressing lever, and the pinch roller is pressed against the cab stun with a predetermined pressing force by the action of the pressing spring.

(e) Effects As described above, according to the present invention, in a VTR in which the loading means is constituted by a plurality of links, the guide means for guiding the connection points of the links is integrally provided on the guide/cylinder peripheral surface. The lower guide tier makes it possible to realize an ultra-compact VTR without restricting the space for other mechanisms.

[Brief explanation of the drawing]

The drawings all relate to one embodiment of the present invention, and FIG. 1 is a plan view of the loading mechanism in the en-ext mode, and FIG.
The figure is a left side view of the same in the play mode, FIG. 3 is a cross-sectional perspective view of the left leading kite pro, FIG. 4 is an explanatory diagram of the operation of the loading mechanism in the stop mode, and FIG. Fig. 6 is a plan view of the mode setting mechanism in play mode, Fig. 7 is a right side sectional view of the same in play mode, Fig. 8 is an explanatory diagram of the same operation in Essie Z mode, and Fig. 9 is an explanation of the same operation in Strike/Mep mode. Fig. 10 is a perspective view of the pinch roller pressure bonding mechanism, Fig. 11 is an explanatory diagram of the same operation in stop/stop mode, Fig. 12 is an explanatory diagram of the same operation in recording standby mode, and Fig. 13 is an explanatory diagram of the same operation in play mode. It is an explanatory diagram. Explanation of main drawing numbers (1)...Guide cylinder, (3)...Kite protrusion, (12X12)...Loading arm, (U) (
1)・1st ``1-ding link, <14><14)
・No. 20 - Deing Link, (16) (16)・
・Sushiida, (wear bar 19)...Leading guide block, (■)・Kite plate, (17aH17a) Guide groove. □--1° strike 17-te-1 do Figure 9

Claims (1)

[Claims] (1) In a video tape recorder that performs recording and playback by pulling out a tape from a cassette and winding it around a guide cylinder at a predetermined angle, a pair of loading arms are pivotally supported on a pair of support shafts, and a pair of loading arms are connected to the ml-ding arm. a pair of first links, a pair of second links connected to the first links, a tape guide fully connected to the second links, and a first guide means for defining a movement path of the tape guide;
A guide mechanism for a video tape recorder comprising a periphery of the guide cylinder and a second guide means provided integrally with the stone to guide the connecting point of the first and second links.