JPS6313163A - Cassette loading driving mechanism - Google Patents

Abstract

PURPOSE:To obtain a reliable device by providing a driving gear which drives a fast winding post and a cassette loading gear which executes a cassette loading action, and uniting both gears with a spring. CONSTITUTION:At the time of cassette loading, the driving gear 1 begins to rotate in a clockwise direction by the rotation of a cassette loading motor and the cassette loading gear 7 unitedly rotates with the driving gear 1 by the energizing force of a torsion spring. As the result, a cassette holder is made to drive and the guide pin 8a of the cassette holder advances and descends on a guide groove 6a from the left side in the figure in order to move to a loading position. At the time of completing cassette loading, the gear 7 is fixed with a fixing member, so that the driving gear 1 is made to rotate against the torsion spring provided between the gear 1 and the gear 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention 1 (Field of Industrial Application) The present invention relates to a cassette loading drive layer 4M for performing a cassette loading operation in a magnetic recording device equipped with a rotating head such as an 8 mm video recording device. In particular, the cassette loading drive motor is used to pull out the fast-winding post for fast-forwarding and rewinding operations, following the cassette-loading operation.・[1-ding drive 'IM
Regarding 4irM.

(Prior Art) In recent years, technological developments based on consumer needs have led to the practical use of magnetic recording devices equipped with rotating heads, such as 8 mm video cameras, and there is a demand for further downsizing and simplification of the magnetic recording devices.

In addition to the cassette loading operation, such magnetic recording devices require a so-called tape loading operation in which the tape is pulled out from the loaded cassette and wound around the rotating head. A loading mechanism is provided.

For example, in the case of 6 mm video, in order to increase the amount of recorded information, there are some that wrap a tape around the rotary head over three quarters of the entire circumference. In such a mechanism, a loading block equipped with a guide roller and an inclined post, and a loading block equipped with an inclined post are advanced along a rotating head, and a pinch roller is advanced to roughly move the left and right ends. It is necessary to move the instep post forward.

Conventionally, such loading blocks, rib blocks,
The pinch roller and quick-winding post block were driven by a drive motor for tape loading, but since the operation timing of each member is different, if these were driven by a single drive motor, the operation would be complicated. This caused the problem of parts interfering with each other.

Therefore, recently, instead of using the tape loading drive motor to drive the fast winding post, which operates relatively simply, a cassette loading drive motor has been used to drive the fast winding post, which simplifies the configuration of the tape loading mechanism and increases its reliability. It is thought to improve sex.

In this case, since the timing of the cassette loading operation and the pulling out operation of the quick-winding post are completely different, it is necessary to divide the driving force to perform both operations. A simple way to branch the driving force is to use a so-called intermittent gear mechanism in which two intermittent gears are placed on both sides of the drive gear, but even with this intermittent gear mechanism, Since means for drawing in each intermittent gear and means for holding the intermittent gears in the intermittent position are required, the structure has the problem that it tends to become large in size.

Incidentally, the above-mentioned problems are not limited to 8 mm videos, but also exist in tape recorders and the like having a similar configuration.

(Problems to be Solved by the Invention) As described above, in a magnetic recording device using a conventional rotary head, in order to simplify the configuration of the tape loading mechanism, a drive motor for cassette loading is used to drive a fast-winding post. Even when the drawing operation is performed, the problem arises that the branching structure of the driving force of the drive motor becomes complicated and large in size.

The present invention was proposed in order to solve these problems, and its purpose is to enable branching of the Tanabata driving force for cassette loading by a simple means, and to By providing a simple and compact cassette loading drive mechanism that also pulls out the fast-winding post using a drive motor, Tape Loading V! i. To simplify the configuration of the SM, eliminate problems such as interference between members, and obtain a small and highly reliable magnetic recording device.

[Structure of the Invention] (Means for Solving the Problems) A cassette loading drive mechanism according to the present invention includes a drive gear connected to a drive motor and driving a fast-winding post;
The present invention is characterized in that a force cell 1 for performing a cassette loading gear is provided with a loading gear, both gears are integrated with each other by a spring, and the driving gear is configured to have an overstroke for the cassette loading operation.

(Function) By having the above-described configuration, the present invention can split the driving force with an extremely simple means of only a double gear A of the 1st drive gear and the cassette loading gear and a spring, so that it can be quickly wound. A simple and compact cassette loading drive mechanism can be obtained without drawing out the post.

In addition, in the drive motor for tape loading,
Since it is only necessary to move the loading block, sub-block, and pinch roller forward, the configuration can be significantly simplified compared to the conventional one, and the members do not interfere with each other.

Therefore, it can greatly contribute to the realization of a compact and highly reliable magnetic recording device.

(Example) Hereinafter, an example of a cassette loading drive groove according to the present invention will be specifically described with reference to the drawings.

*Configuration of the Embodiment In FIG. 1, reference numeral 1 denotes a drive gear that rotates clockwise in the figure about a shaft 2 during cassette loading by a cassette loading drive motor.

On the outside of this drive gear 1, as shown in FIG. 2, a drive link 3 and a regulation link 4 are provided in this order. The drive link 3 and the regulation link 4 are rotatably attached to each other by a connecting shaft 5. The drive link 3 is rotatably provided around a shaft portion 1a formed in the drive gear 1.
An engagement pin 9a of a quick-winding post drive plate 9, which will be described later, is engaged in an engagement hole 3a provided at the lower end in the figure. The regulating link 4 is provided with a cam pin 4a, and this cam pin 4a is inserted into a full cam 1b provided on the drive gear 1, so that it swings according to the rotation angle of the drive gear 1. In this case, the cam pin 4a of the regulation link 4 is located at the large diameter part of the groove cam 1b of the drive gear A' 1 during cassette loading (therefore, the regulation link 4 is fixed), and after the cassette loading is completed, the cam pin 4a is moved from the inclined part to the small diameter part. It seems to be moving. Zarani, regulation link 4
The swing range of is regulated by the dimensions of the engagement hole 4b into which the shaft portion 1a is inserted.

Further, a cassette loading gear 7 is provided on the side of the device side plate 6 of the drive gear i 1 so as to be overlapped therewith. The cassette loading gear 7 is provided with an engagement pin 7b, which is inserted into an engagement groove 1C provided in the drive gear A71. Further, a torsion spring 7a as shown in FIG. 2 is provided between the drive gear 1 and the cassette loading gear 7, and this torsion spring 7a causes the cassette loading gear 7 to It is biased clockwise (cassette loading direction). Therefore, when loading a cassette, the loading gear 7 rotates integrally with the drive gear 1 by locking the engagement pin 7b with the locking portion at the end of the engagement groove 1C of the drive gear 1. It looks like it will. Furthermore, when the cassette loading is completed, the A77 is fixed at the loading completion position by a fixing member (not shown), and the engagement pin 7b is inserted into the engagement groove 1 of the drive gear 1.
It seems to move to the escape part of C. In FIG. 2, 8 is a cassette holder driven by A' 7 during cassette loading, 8a is a guide pin of the cassette holder 8, and 6a is a device side plate 6 for guiding the guide pin of the cassette holder 8. This is a guide groove provided in the.

In FIG. 5, the fast-winding post drive plays 1 to 9 each have an engagement pin 9a with the drive link 3 at the rear, a rack 9b at the front, and slide holes 9C provided at the front and rear. It is provided so that it can be moved back and forth by inserting a fixing pin 10 fixed onto the mounting board. The rack 9b of the fast-winding post drive plate 9 is connected to the right-hand fast-winding post pull-out gear 13 via first and second connecting gears 11 and 12.
are connected. Right side fast-winding post drawer gear 13
is provided coaxially with the right-hand fast-winding boss 1 to block 15, which has a right-hand fast-winding roller 14 at its tip.

The right-hand fast-winding post block 15 is biased toward the fast-winding position (clockwise in the figure) by a spring 16.
When the device is not in use, when loading or ejecting the cassette, one end of the engagement notch 15a is connected to the locking portion 13a of the right side quick winding boss 1 to drawer gear 13.
By being locked in the position, it is held in the retracted position as shown in FIG.

The fast-winding post connecting plate 17 is provided in a direction perpendicular to the fast-winding post drive plate, and has first and second racks 17a and 17 at its right and left ends, respectively.
b is formed. The flat roll post connecting plate 17 is mounted so as to be reciprocatable in the left and right direction by inserting fixing pins 18 fixed to the device curtain plate into slide holes 17G provided on the left and right sides thereof. The first rack 17a of the flat-rolled post connecting plate 17 meshes with the flat-rolled post pull-out gear 13 on the right side. The second rack 17b of the flat-rolled post connection plate 17 meshes with the flat-rolled post pull-out gear 19 on the left side.

The left flat-rolled post pull-out gear 19 is provided coaxially with the left flat-rolled post block 21 which is provided with the left flat-rolled roller 20 at its tip.

The upper winding post block 21 on the left side is biased toward the flat winding position (counterclockwise in the figure) by a spring 22, and when the device is not in use, when loading a cassette, and when the 491
At 96 o'clock, one end of the engagement notch 21a is locked to the locking part 19a of the flat-wound post pull-out gear 19 on the left side, so that it is held in the retracted position as shown in FIG. ing.

Roughly speaking, the flat-rolling post block 15 on the right side is held in the flat-winding position by the base of the guide post 23, and the flat-winding post block 21 on the left side is held in the flat-winding position by the tension arm @24 (not shown). It's starting to be regulated. That is, in this embodiment, the guide post 2
3 and the shaft 24 of the tension arm each serve as a flat winding position regulating member.

Function of this embodiment The structure of this embodiment having the above-mentioned structure is as follows.

First, during cassette loading, the drive gear 1 starts rotating clockwise in the figure from the state shown in FIG. 1 due to the rotation of a cassette loading motor (not shown). As a result, the cassette loading gear 7 rotates together with the drive gear 1 due to the urging force of the torsion spring 7a. As a result, the cassette holder 8 is driven, and the guide pin 8a of the cassette holder 8 advances and descends on the guide groove 6a from the rear position (left side in the figure) in FIG. 1, and moves to the loading position in FIG. 3.

On the other hand, at this point, the regulation link 4 is fixed as its cam pin 4a moves on the large diameter part of the grooved cam 1b, and therefore the drive link 3 connected to the link by the connecting shaft 5 is also fixed. has been done.

At the time of completion of cassette loading shown in Fig. 3,
The cassette loading gear 7 is fixed at the position shown in the figure by a fixing member (not shown). Therefore, after this, the drive gear 1 will rotate against the torsion spring 7a provided between it and the cassette loading gear 7. In addition, in FIG. 3, the cam pin 4a of the regulation link 4 is located at the entrance of the inclined part to the small diameter part of the grooved cam 1b of the drive gear 1. Therefore, as the drive gear A71 rotates thereafter, the regulation link 4a rotates forward (to the right in the figure). As a result, the drive link 3 connected to the regulation link 4 by the connection shaft 5 rotates clockwise in the figure, and the flat-wound boss 1 to drive plate 9 inserted into the engagement hole 3a engage with each other. pin 9
(moves to the left in the figure).

As a result, as shown in FIG. 6, the right side flat-rolled post pull-out gear A213 is in the release direction via the first and second connection gears 11, 12 connected to the flat-rolled post drive plate 9. Rotate in a clockwise direction. As a result, the flat-winding boss 1 to the block 15 on the right side are rotated to the flat-winding position by the biasing horn of the spring 16, and accordingly the flat-winding post 14 on the right side is moved to the flat-winding position. Furthermore, the flat-rolled post connecting plate 17 moves to the left in the figure, and this movement causes the left flat-rolled post pull-out gear 19 to move in the anti-Japanese 4B1 direction in the figure, which is the release direction. As a result, the left flat-wound post block 21 is rotated to the flat-wound position by the force of the spring 22, and the left flat-wound post 20 is therefore moved to the flat-wound position.

The flat winding post block 15 on the right side is locked in the flat winding position by the base of the guide post 23, and the flat winding bosses 1 to 21 on the left side are locked in the flat winding position by the shaft 24 of a tension arm (not shown). will be stopped.

As described above, in this embodiment, the drive gear and the cassette [1-
The driving force of the drive motor for cassette loading can be divided by a simple configuration in which the loading gear and the loading gear are stacked and connected by a torsion spring. Therefore, a much simpler configuration is possible than when using an intermittent gear mechanism. Also, on the deep loading mechanism side, the configuration can be simplified compared to the case where the post is pulled out quickly, and problems such as interference between members can be solved. As a result, it is possible to provide a simpler and more reliable magnetic recording device, which is particularly effective for 8 mm video, which has been attracting attention recently.

*Example of use Note that the present invention is not limited to the above-mentioned example. For example, the drive configuration from the drive gear to the fast-winding post, the configuration from the cassette 1-loading gear to the cassette holder, etc. It can be selected as appropriate.

[Effects of the Invention] As explained above, according to the cassette loading drive mechanism of the present invention, it is possible to split the driving force with a simple configuration using double gears and springs, which makes it compact and simple. It is possible to provide a cassette loading drive mechanism that can pull out the fast-winding post, and as a result, the tape loading mechanism can be simplified and problems such as interference between members can be eliminated, resulting in a simple and highly reliable magnetic recording device. can contribute to the realization of

[Brief explanation of the drawing]

1, 3, and 4 are side views showing the configuration of the drive side of an embodiment of the cassette loading mechanism according to the present invention, and FIG. 2 is a sectional view taken along the line A-A in FIG. 1. , FIG. 5 and FIG. 6 are both plan views showing the structure of the fast-winding post side in the same embodiment. DESCRIPTION OF SYMBOLS 1... Drive gear, 1a... Shaft part, 1b... Cam gear, 1G... Engagement hole, 2... Shaft, 3... Drive link, 3a... Engagement hole, 4 ...Restricted link, 4a...
・Cam pin, 4b...Engagement hole, 5...Connection shaft, 6.
...Device side plate, 6a...Guide groove, 7...Cassette loading gear, 7a...Torsion spring,
7b... Engagement pin, 8... Cassette holder, 8a.
...Guide pin, 9...Fast winding post drive plate,
9a... Engagement pin, 9b... Rack, 9C... Slide hole, 10... Identification pin, 11° 12... Connection gear, 13.19... Quick winding post drawer gear, 13
a, 19a--locking portion, 14.20... fast-winding post, 15, 21... fast-winding post block, 15a,
21a...Engagement notch, 16.22...Spring, 17...Quick winding post connection plate, 17a, 1
7b...Rack, 17C...Slide hole, 23...
・Guide post, 24...Tension arm axis.

Claims (1)

[Scope of Claims] A cassette loading drive mechanism that sequentially performs cassette loading and fast-winding post withdrawal using a drive motor, comprising: a. a drive motor; b. A drive gear that is connected to the drive motor and drives the quick-winding post via a connection gear, link, or the like. c. A cassette loading gear that is provided overlapping the drive gear and rotates together with the drive gear to perform a cassette loading operation. d. A locking part that is provided on either the cassette loading gear or the drive gear and that locks the cassette loading gear to the drive gear during rotation on the cassette loading side, and the drive gear has an overstroke with respect to the cassette loading gear. An engagement groove consisting of various relief parts. e. An engaging portion that is provided on a member of the cassette loading gear and the drive gear that does not have the engaging groove, and that engages with the engaging groove. f. A spring that is provided between the cassette loading gear and the drive gear and applies a biasing force to the locking portion of the engagement groove of one member so as to press the engagement portion of the other member. A cassette loading drive mechanism characterized by being constructed from each of the requirements a to f above.