JPS6199960A - Tape running mode switching device - Google Patents

Abstract

PURPOSE:To prevent a deviation of a control timing by providing an idler mechanism for controlling an operation, and a reel lock release mechanism, in accordance with a movement of a friction rack which is engaged to each of plural plate cam members. CONSTITUTION:When a video cassette is installed to a prescribed position in an EJECT state, a detecting mechanism operates and a rack plate 10 moves in the upper direction, a cam gear rotates counterclockwise and pulleys 12A, 12B rotate clockwise, therefore, a friction rack 14 moves in the left direction. Also, a left side rack plate 19 moves in the lower direction, a plate cam 15A also moves to the left side as one body with the friction rack 14, a friction plate 24 engaged to a plate cam 15A rotates clockwise by using a shaft 7g as a supporting point, a pin 24b moves in the lower direction, and a reel lock mechanism is released. In accordance with a movement of the friction rack, an idler mechanism an a brake mechanism are controlled, therefore, a deviation of a timing of the operation is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Use on Tumors The present invention is directed to tape running mode switching devices used in various tape players.

B. Summary of the Invention The present invention relates to a tape running mode switching device for a tape player such as a video tape recorder (VTR) or an audio tape recorder (ATR).

Cam shape III for controlling the operation of the idler mechanism and brake mechanism: By simplifying the cam shape, planar space can be used efficiently.

C. Prior art tape players utilize an idler mechanism to switch the tape running direction in order to run the tape in the forward or reverse direction as required. Figure 7 shows a tape player equipped with such an idler mechanism, where A is a supply reel stand, B is a take-up reel stand, C is a drive gear, D is an idler gear, and arm E connects the drive gear. It is configured so that rotational force is transmitted by being integrated with C.

When a predetermined tape running mode is operated, the idler gear D is swung left or right by the necessary control mTh, contacts the supply reel stand A or the take-up reel stand B, and drives the drive gear C. Transmits I1gj turning force of. For example, when the drive gear C is rotating clockwise, a counterclockwise turning force is applied to the idler gear D, and when the drive gear D is swung to the left, a rotational force is applied to the supply reel stand A that causes the tape to run in the opposite direction. is given. Conversely, when the working gear C is rotated counterclockwise, a clockwise rotational force is applied to the idler gear D, which is swung to the right and causes the tape to run forward on the take-up reel stand B. Rotational force is given.

Constant speed feed (i reverse direction PLAY) and alternate speed feed (FF) in each of the forward and reverse directions.

R)! ;W) is performed.

When switching the tape running direction using an idler mechanism according to the tape running mode, it is possible to apply a constant rotational torque to the reel stand in both constant speed feed and i#l wander. This is desirable because smooth tape running can be achieved, and only one type of idler gear D needs to be prepared.

However, in reality, if only one type of idler gear or idler mechanism is provided, the tape will not run smoothly because the rotational torque will vary depending on the tape running speed.

For this reason, generally the first idler gear D is
At the same time, a second idler gear F and two types of idler machines S% are arranged so as to overlap each other, and a means is maintained to separate them depending on the tape running speed.

Also, for each reel stand A, B, a brake mechanism G,
H is arranged to suppress the rotation of each reel stand A, B as necessary.

In this way, there are two types of idler mechanisms and brakes.
jr: When prepared, it is necessary to synchronize the timing of the movements of both inkstones in order to run the tape smoothly.

For this reason, in conventional switching devices, a single cam gear or the like is provided as a control member, and the timing of the operations of the two mechanisms is synchronized by driving this cam gear.

D. Problem to be Solved by the Invention However, in such a conventional device, due to the arrangement of the cam gear, a considerable amount of space is required in the transmission path for transmitting power to the above-mentioned type 2a [type idler + km and brake monkey structure]. It was inevitable that the structure of the transmission mechanism would become complicated. Furthermore, since both transmission mechanisms are controlled by a single cam gear, the cam shape is complicated, which may lead to errors in the load and cause the timing of the operations of both mechanisms to be out of order.

The present invention has been made from the above viewpoints, and by simplifying the cam shape of the cam gear that controls the operation percentage of the idler mechanism and the brake mechanism, it is possible to prevent errors in control timing and save planar space. The purpose is to provide tape running mode switching equipment &'.

E Means for Solving Problem t' In order to achieve such an objective, the present invention provides (at
a supply reel stand and a take-up reel stand for holding the tape; (b) a brake mechanism and a tree load he <8 that can be engaged with the supply reel stand and the take-up reel stand; (c) 1) 71 A friction rack in which several plate cam members are stacked and arranged integrally and can be moved in the left and right direction, (
d) An idler mechanism and a reel lock release mechanism that are respectively engaged with the plate cam members of the above number and whose operations are controlled according to the movement of the friction rack; with a cam gear for driving.

The present invention provides a tape running mode switching device including:

F Function According to the above configuration, the idler mechanism and the brake mechanism are controlled in accordance with the movement of the friction rack driven by the cam gear, so that the timing of the operations of the two mechanisms can be prevented from being out of sync.

G The present invention will be explained with reference to the following drawings I11: ttts@Figures 1 (a) to (e) and Figures 2 (al to (e) show a tape running mode switching device fjt' according to the embodiment of the present invention) Jh:
Figure 1 shows the configuration in FF or REW mode, and Figure 2 shows the configuration in PLAY mode.
a, a gear le integrally fixed to this shaft 1a;
It consists of a gear 1f, a conical spring lc, and a presser plate 1d, which are arranged coaxially through the gear 1e and the gear lbt. 7L) 1b, conical spring lc, and presser plate 1d are so-called JIJ! A friction transmission mechanism is configured, and the gear 1e
*Moves to regulate the rotational torque transmitted between 1f.

Reference numeral 5 denotes a take-up reel stand, and 6 a supply reel stand, each of which has gear portions 5a, 6aJi< on its side surfaces, and a friction load acting surface 5 at a lower position to which a friction load generating member is to be contacted.
b, 6b', and the supply reel stand 6 is further provided with a band brake action m 6 c.

3 is take-up reel gear 4! *%4 consists of the supply reel rod 1 and the mechanism, both of which have the same shape and configuration.

The take-up reel gear mechanism 3 includes a shaft 3a1 and a gear 3e integrally fixed to the shaft 3a.

A gear 3f, a spring 3c, and a presser plate 3d are arranged coaxially with the gear 3e through the felt 3bt' to form a structure 4i. Also, the friction transmission mechanism is FEL) 3b.

It is composed of a spring 3c and a presser plate 3d. Gear 3 above
e meshes with the gear portion 5a of the take-up reel stand 5 to transmit rotational force.

Similarly, the supply reel gear 4 is connected to the shaft (@)
4a, gears 4e*+f, felts 4b, springs 4C, and presser plates 4d, and the friction transmission mechanism is composed of felts 4b, springs 4c, and presser plates 4d. Above gear 4C
meshes with the gear portion 6a of the supply reel stand 6 so that rotational force can be transmitted.

Reference numeral 2.7 is an idler gear mechanism, each of which is arranged at a different position in the vertical direction and configured to plow independently for each operation mode. The first gear 2 is gear 2a and pin 2b.
It is wound up with s 2et 2t, spring 2c, friction plates 2d and 2f, and shaft 2g. The gear 2a is rotatably fixed to the 7-reaction plate ad by a pin 2b with the spring 2C housed. Further, the seven friction plates 2d and 2f are rotatably fixed to each other by a pin 2e, and the smooth friction plate 2f is rotatably fixed to each other by a shaft 2g. The gear 2a meshes with the gear 1f of the drive gear frame structure 1, and the rotational force thereof is transmitted to the gear 3e of the take-up reel gear mechanism 3.
or to the gear 4e of the supply reel stand 4.

Similarly, the second gear 7 has a gear 7a and a pin 7b.
7e, 71. Spring 7c, friction lever) 7d, 7f
, shaft 7g.

Is the gear 7a above spring 7C? In the +- housed state, it is rotatably identified by the bottle 7b to the 7-reaction plate 7d. Also 7 rection plate 7d.

7f are rotatably fixed to each other by pins 7e, and 7rection plates 7f are rotatably fixed to each other by shafts 7g. The gear 7a meshes with the gear 1e of the drive gear mechanism 1, and its ) The gear 3fK of the take-up reel gear mechanism 3 or the supply reel stand 4
It is busy so that the gear 4fK can be transmitted.

Only one of the gears 2 and 7 of these il selectively meshes with the gear 1f or le of the drive gear machine 81, and the rotational force ljI: reel gear mechanism 3 is transmitted along a predetermined path.
or 4.

Reference numeral 8 indicates a fixed shaft common to the first and second gears 2 and 7, and 9 indicates a chassis.

Reference numeral 10 denotes a right side rack plate which is given vertical movement by the IrA movement of a loading motor, etc., and according to the vertical movement, a cam gear 11'lh: rotates, and this rotational force is applied to a pulley 12A, a belt with a timing belt Cm). 13, is applied to the friction rack 14 via the pulley 12Bt'.

The friction rack 14 is configured to be movable in the left and right direction according to the rotational force, and is stacked with three plate cams 15A, 1.
5B and 15C are installed integrally.

Here, the board cam 15A has an eye to which a video cassette is attached.
There are three lines that work to release the reel lock girders on the back of the video cassette and engage with the plate.

Further, the plate cam 15B executes and cancels the FF or REW mode, and engages with the 7-reaction plate 2f.

Furthermore, the plate cam 15C executes the PLAY mode and solves the problem Vf.
& is engaged with the 7-reaction plate 7f.

According to the movement of the friction rack 14 in the left-right direction, this lL clearance is changed by the pulley 16A, the timing belt (toothed belt) 17. Cam gear 1 via pulley 16Bjz
given to 8. In response to the rotation of the cam gear 18, the left rack plate 19 is moved vertically, and this movement is transmitted to the tape loading wall &.

That is, the upward and downward movements of the right rack grating 10 are caused by the cam gear 11, the pulleys 12A, 12B, the timing belt 13. Friction rack 14, pulley 16
A, 16B, timing belt 17. The vertical movement of the left rack plate 19 is transmitted via the cam gear 18 .

21 is a brake mechanism on the winding side, and 21 is a brake mechanism on the supply side, and each is a spring S□ equipped with rubber members B1 and 82t'.

By S2, the above-mentioned pick-up reel stand 5 and supply reel stand 6
It is now possible to contact.

ρ is the calendar side preload mechanism, TA is the supply side preload mechanism, and each is a felt member F□eF2t' spring 83*S
4 makes it possible to contact the take-up reel stand 5 and the supply reel stand 6. These reloading mechanisms 22, 23 are for preventing the tape held on the reel stand 5, 6 from running out of control for any reason.

Based on the above refinement, each operation when switching the tape running seed will be explained.

In addition, FIG. 3 shows the timing belt of each mechanism when performing each operation, where 1 indicates the operation on state and 0 indicates the operation off state M'
It is shown in

(Gyu) Reel Lock Race Sakaki Debris Removal Operation When the video cassette (10) is installed in the predetermined position in the IEcT state, a detection mechanism (not shown) is activated and the right rack brake (10) in FIG. 1 moves upward.

As a result, the cam gear 11 rotates counterclockwise, and the cam gear 11 rotates counterclockwise.
Since JL2A and 12B rotate clockwise, the friction rack 14 moves to the left. Further, as is clear from the above description, the left rack plate 19 moves downward.

At this time, the plate cam 15A also moves to the left side together with the friction rack 14. As shown in Fig. 4(a), the temporary cam 15
The 7 riction plate engaged with A serves as a fixed fulcrum for the shaft 7gk, with a pin 24a at one end and a pin 2 at the other end.
5a is attached, and is always urged upward by a spring S5. Therefore, when the plate cam 15A moves to the left, the bin 24a is pushed up by the stepped portion of the plate cam 15A, and the 7) 7) 7) 7) 7) 7) 7gY rotation plate rotates clockwise as the arrow as a fulcrum. As shown in FIG. 4(b), the bin 24b moves downward.

Since this tongue 24b is arranged so as to be positioned on the back side of the video cassette, it engages with the reel lock mechanism on the back side of the video cassette and moves downward to lock the reel. Work like you do.

At this time, brake machine am, 21 and preload jpj
Both ρ and 23 remain on.

C02) F Operation in F mode When the right rack plate lO moves further upward,
Cam gear IL is number side brake mechanism 20%: shaft 2
Turn it off by rotating it counterclockwise around OA'. Similarly, the cam gear 18 rotates the service side brake mechanism 21 clockwise around the shaft 2]A and Y, so that it is turned off.

When the brake 1k20.21 is released (turned off), the movement of the friction rack 14 is stopped together with the right rack plate IO.

When a rotational force is applied from the I cooperation W to the shaft 1a to rotate the drive gear mechanism 1 in a counterclockwise direction as shown by the arrow in FIG. 1(a), the gear 1e integrated with the shaft 1a rotates at the same time, and this rotational force is 7 lb)
Since the vibration is transmitted to the gear if via the original vibration transmission mechanism, the gear if also rotates counterclockwise.

At this time, the gear 2a of the first gear 2 next to the idler gear is (
As shown in C), the gear 1 is placed so as to mesh with the gear 1f of the drive gear structure 1, so when the gear 2a is rotated clockwise, the friction plate 2d acts as the fulcrum of the pin 26t'. Swings clockwise (to the right). As a result, the gear 2a is also meshed with the gear 3e of the take-up reel gear mechanism 3 as shown in (d), so the gear 3e is rotated counterclockwise, and the gear 3e and the gear portion 5a are aligned. The take-up reel stand 5 is rotated clockwise. Therefore, the mode becomes FF (fast forwarding) mode.

(G3) Operation in RE W mode The drive W applies a rotational force of 1 to the shaft 1a of the drive gear 1 to rotate it clockwise in the opposite direction to the arrow in FIG. 1(a).

As a result, the friction transmission mechanism is activated, and the gear 1f is rotated clockwise, and the gear 2a of the first gear 2 of the idler gear is rotated counterclockwise.

As a result, the self-retention plate 2d is raised by the pin 2e.
Since the gear 2a is swung counterclockwise (to the left) at the k-junction, the gear 2a meshes with the gear 4e of the MIJ-Lugya mechanism 4, and the gear 4e is rotated clockwise. Therefore, the R8 reel 6, in which the gear 4e and the gear portion 6a are meshed, is rotated counterclockwise, so that the REW (return=reverse direction fast forwarding) mode is established.

In the above FF or REW operation, the brake K
A 4i: Both t20 and t21 have been released, but neither preload ice pickup nor Otsu has been released.

(G4) When transitioning from FF/REW mode to PLAY mode, plate cam 15 B along with friction rack 14
or by moving leftward (left side ruck play)
19 The tape loading operation starts and P
Preparations for LAY mode are made.

As shown in FIG. 5(a), the friction grating 2f engaged with the temporary cam 15B has a pin 2i at one end and a pin 2e1 at the other end as a fixed fulcrum on the shaft 2g'. A friction rate of 2d is maintained.

Therefore, when the plate cam 15B moves to the left, the bin 21 is pushed up by the stepped portion of the plate cam 15B, and the friction plate 2f rotates clockwise I/c as shown by the arrow with the shaft 2g as a fulcrum. . Along with this, the friction plate 2d is pulled downward by the bottle 2e. At this time, 7 rection plates 2dK
By locking the pre-provided constant shaft 8 in the pre-provided convex groove 2h, the gear 2a4:J: As shown in FIG.
The reel gear stops at a position where it does not contact any of the reel gears 4.

Therefore, the rotational force from the drive gear mechanism 1 is not transmitted to either the drawer reel stand 3 or the supply reel stand 4.

At the time of this transition, the brake mechanism is bent only with respect to the take-up reel stand 3.

At this time, the plate cam 15C is engaged with the friction plate 7f, as shown in FIG. Bin 7e1fI: W and this pin 7
A friction plate 7d is held at e. F
When the idler gear mechanism coffin 2 on the 7 friction plate 2d is in mesh with the take-up reel gear mechanism 3 or the supply reel gear b 4444 as in the F or REW mode, the friction plate 7d has the convex groove 7
Since the fixed shaft 8 is locked to the gear 7a, the gear 7a is stopped at a position where it does not contact either the take-up reel gear mechanism 3 or the supply reel gear mechanism 4, as shown in FIG. 6(b).

(05) Operation in PLAY mode When the plate cam 15C moves to the left together with the friction rack 14, the gear mechanism 2 is disengaged from the gear mechanism 3 or 4, resulting in a 7-reaction play (7). The pin 71 moves diagonally, but at the same time as shown in FIG. Depending on the force, friction plate 7f
Shaft 7g'4r: Rotates clockwise as shown by the arrow as a fulcrum. Accordingly, the friction plate 7d is pushed diagonally upward to the right by the pin 7e.

As a result, the locked state between the convex groove 7h and the fixed shaft 8 is released, and the gear 7a of the idler gear mechanism 7 meshes with the gear 1e of the m-movement gear housing 1.

When the drive source applies a rotational force 7) 1aK to the drive gear mechanism 1 to rotate it counterclockwise as shown by the arrow in the second factor (a), the gear 1e also rotates at the same time and this rotational force is applied to the gear mechanism 1. Since it is also transmitted to gear If via the friction transmission mechanism, gear If also rotates counterclockwise.

At this time, idler gear & gear 7 of second gear 7 of tf4t
As shown in (C), a is arranged to mesh with the gear 1e of the above-mentioned & moving gear rock structure 1, so when the gear 7a is rotated clockwise, 7d is the pin 7C. It is swung clockwise from the intersection point. As a result, the gear 7a meshes with the gear 3f of the take-up reel gear mechanism 3 as shown in (d), so the gear 3f is rotated counterclockwise. This rotational force is transmitted by a fusing friction transmitter 18 such as FEL) 3b.
Since the signal is transmitted to the gear 3e via the winder, the gear 3C also rotates counterclockwise and meshes with the gear portion 5a of the take-up reel stand 5.

Therefore, since the take-up reel stand 5 is rotated clockwise, PL
It becomes AY mode.

Figure 2(e) shows the first gear 2 in the idler gear mechanism.
and second gear 7 and vertical position bust 0 spring 2
C and 7C are friction plates 2d.

7d7a'2E Provided for smooth swinging motion when moving away to the right.

In addition, the take-up side preload transmission mechanism n and the supply side preload mechanism B are released together with the take-up side Breegie mechanism.

(G6) Operation in the tracing force direction PLAY mode The drive W applies a rotational force to the shaft 1a of the drive gear mechanism 1 so as to rotate it in the direction opposite to the arrow shown in FIG. 2 (al).

As a result, the gear if is rotated clockwise via the friction transmission mechanism, and the gear 7a of the second gear 7 of the idler gear mechanism is rotated counterclockwise.

As a result, the 7-reaction plate 7d is swung counterclockwise about the pin 7e, so that the gear 7a is also meshed with the gear 4f of the supply reel gear mechanism 4, and the gear 4f
is rotated clockwise.

This rotational force is transmitted to the gear 4C via the Af operation transmission mechanism, and the gear 4e is meshed with the gear portion 6a.

Therefore, the supply reel stand 6 is rotated counterclockwise, so
This results in a so-called reverse play mode.

As shown in FIG.
B and 16A rotation axis J3. The four pins of J4 determine its position.

Also, all Kansei machines are chassis 9 and video cassette 5.
The distance between h (1) It will be placed in a spatial circle.

As is clear from the detailed description of the invention, the following effects can be obtained according to the invention: ■ The cam shape of the cam gear is simplified because the cam gear is self-equipped in a two-dimensional manner. This makes it easier to manage the cam shape.

■ Brake post-release and idler = ntt w Since the number of ridge cams to be controlled are stacked in the vertical direction, space can be saved in plan.

■ Since the power from the drive source is transmitted to the temporary cam using a belt saw with a belt saw, it is easy to adjust the timing of the operation of each mechanism, including the brake mechanism 2 and the idler mechanism.

■ Friction transmitters for FF/REW mode and PLAY mode are set by price, making it easy to manage rotational torque transmission.

The present invention is particularly effective for compact and dynamic applications such as the 81111'VTR, but is not limited thereto and can be applied to tape players.

[Brief explanation of the drawing]

Figures 1 to 6 all show the implementation sequence of the present invention, and include Figures 1182.1(a), 2(-1,
(b), Figure 5 (at, (bl) and Figure 6 (a
l, (bl is a plan view, Fig. 1(b) - (
el and Figure 2(b) - (el is 1ltiIIIO
3 are timing charts, and FIGS. 7 and 8 are both schematic diagrams for explaining the present invention. 1°°° drive gear structure, 2, 7... Idler gear mechanism, 3... Take-up reel gear mechanism, 4... Supply reel gear body, 5... Take-up reel stand, 6... Supply reel Base, 8... Fixed shaft, 9... Chassis, 10.
19...Rack plate, 11.18...Cam gear, 12A, 12B, 16A. 16 B... Pulley, 13.17... Belt with chevron,
14...Friction rack, 15A, 15B, 15
C...plate cam, addition...take-up shaft brake cherry Mζ, 21
...Supply side brake area. ρ...Take-up side grille load mechanism, prisoner...supply side grille load m mechanism, 24°...7 traction plate, δ...
・Video cassette, 81~. B6... Spring (spring), ″, B□. B2... Rubber member, 11a F2... Felt member. Patent creator Clarion body type company Yoshihito Patent attorney Mizu 1) Takezo h... :・
+7. ,,,'z, - Fig. 1 (C) (e) (d) (c) (d) Fig. 3 - Taer rotation - Fig. 4 (a) (b) Fig. 5 Fig. 6 Figure 5(b) Figure 6(b)

Claims (1)

[Claims] 1. (a) a supply reel stand and a take-up reel stand for holding the tape; (b) a brake mechanism and a preload mechanism that can be respectively engaged with the supply reel stand and the take-up reel stand. (c) a friction rack in which a plurality of plate cam members are integrally arranged and movable in the left-right direction; and (d) a friction rack that is engaged with each of the plurality of plate cam members and moves in accordance with the movement of the friction rack. A tape running mode switching device comprising: an idler mechanism and a reel lock release mechanism whose operations are controlled; and (e) a cam gear for driving the friction rack, brake mechanism, and preload mechanism. 2. Claim 1, characterized in that a toothed belt is interposed between the friction rack and the cam gear.
Tape running mode switching device described in Section 1. 3. The tape running mode switching device according to claim 1 or 2, wherein the idler mechanism comprises a first gear member and a second gear member that selectively operate. 4. The tape running according to claim 3, wherein the first gear member, the second gear member, and the reel lock mechanism are arranged in an overlapping manner corresponding to the plurality of plate cam members. Mode switching device.