JPH0541004A - Tape loading mechanism - Google Patents

Abstract

PURPOSE:To provide a tape loading mechanism with simple constitution, capable of easily performing the positioning of a guide post and inclined post to prescribed positions against a rotary drum and the sure holding to the positions, and also having the small number of parts. CONSTITUTION:A gear part 3 is formed on a drum base 1 which is rotatably provided to support the rotary drum 2, then the 1st guide post 4 and the inclined post 5 located inside of a tape are proximately arranged and supported, and also the 2nd guide post 6 located outside of the tape is supported. A driving gear 7 is engaged to the gear part 3. If possible, it is desirable that a cam gear 8 is engaged to the gear part 3 to rotate a pinch arm 10 linking with a cam 8a of cam gear 8. A pinch roller 11 located inside of the tape is supported with shaft by the pinch arm 10 to support the 3rd guide post 12 located inside of the tape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a helical scan type magnetic recording / reproducing apparatus in which a tape is wound around a rotating drum for recording / reproducing, and the tape is pulled out from a cassette loaded in the apparatus and wound around a rotating drum. Of tape loading mechanism.

[0002]

2. Description of the Related Art In recent years, due to the progress of digital audio technology, a magnetic recording / reproducing apparatus of the type which converts an analog audio signal into a digital signal and records it on a tape has been developed and put into practical use. In such a magnetic recording / reproducing apparatus, since an extremely wide occupied frequency band is required to convert an analog signal into a digital signal, a rotary drum head (hereinafter referred to as a rotary drum) having a wide contact area per unit time is required. Tape play is performed in a state in which the tape drawn out from the cassette is obliquely wound around this rotating drum. Such a method makes the digital signal of the tape spiral (helix).
It is called a helical scan method because it scans in.

Conventionally, a tape loading mechanism used in such a magnetic recording / reproducing apparatus uses a guide post and an inclined post that abut against the tape from the inside of the tape.
By advancing the guide post and the inclined post from the unloading position in the cassette mouse to the tape loading position, the tape is pulled out from the cassette mouse and wound around the rotating drum, and conversely, the guide post and the inclined post are taped. While retracting the tape from the loading position to the unloading position in the cassette mouse, the tape is wound by another mechanism so that the pulled-out tape is stored in the cassette mouse.

The above-described guide post and tilt post are generally supported on an operating member called a loading block, and the loading block is moved with respect to the rotary drum to drive the guide post and tilt post. It is supposed to do. As such a tape loading mechanism, the applicant has previously proposed the technique of Japanese Patent Application No. 2-132507. FIG. 5 shows this conventional technique.

In the tape loading mechanism shown in FIG. 5, two loading blocks 34, 34 are provided in two guide grooves 32, 33 provided on both sides of the rotary drum 31.
35 are respectively inserted, and the guide posts 34a, 3 are provided on the loading blocks 34, 35, respectively.
5a and inclined posts 34b and 35b are supported.
And loading and tape unloading
These loading blocks 34 and 35 are connected to the guide groove 3
It is performed by moving along 2, 33.

In this case, the loading blocks 34, 3
As the members for driving 5, the corresponding loading rotating members 36, 37 are provided, and as the members for driving the loading rotating members 36, 37, the mode member 38 and the drive connecting member. 39 and an elastic member 40 that connects them are provided. Further, the mode member 38 is connected to the cam member 4 via the L-shaped link 41.
2 and is driven via the L-shaped link 41 in accordance with the movement of the cam member 42 by the driving force of a drive motor (not shown).

More specifically, the loading block 35, which is arranged in front of the rotating drum 31 in the tape running direction (winding side), is sequentially connected to the loading rotating member 37 and the drive connecting member 39 via the link 43. It is connected. Further, with respect to the rotary drum 31, a loading block 34 arranged at the rear (supply side) in the tape running direction.
Is connected to the loading rotation member 36 via a link 44, and is further connected to the drive connection member 39 via three links 45 to 47.

At the time of tape loading, the operation of the cam member 42 in the first direction (downward in the drawing) moves the mode member 38 and the drive connecting member 39 in the tape loading direction (rightward in the drawing), By rotating the loading rotation members 36 and 37 on both sides in predetermined directions through the above-mentioned connection structure, the corresponding loading blocks 34 and 35 are driven to the tape loading positions as shown in FIG. During tape unloading, the cam member 42 moves in the second direction (upper direction in the drawing) to move the mode member 38 and the drive connecting member 39 in the unloading direction (left direction in the drawing). Loading pivoting members 36,3
7 is rotated in the direction opposite to the tape loading direction to drive the loading blocks 34 and 35 to the unloading position in the cassette 48.

On the other hand, at one end of the mode member 38, the cam 3
8b is provided, and a fan-shaped connecting gear 49 is attached to the cam 38b.
Are engaged, and the connecting gear 49 is always meshed with the guide post gear 50. The guide post gear 50 supports a guide post 51 that guides the pull-out end of the tape on the supply side. With these configurations, when the mode member 38 moves in the tape loading direction (right direction in the drawing), the guide post 5
1 is driven to the pull-out position, and the guide post 51 is driven to the storage position in the cassette 48 when moving in the unloading direction (left direction in the drawing).

Furthermore, the cam 42b of the cam member 42 is engaged with a pinch arm 53 which pivotally supports the pinch roller 52 at one end thereof, and forms a pinch roller drawing mechanism. In the vicinity of the pinch roller 52 on the pinch arm 53, a guide post 54 that guides the pull-out end of the tape on the winding side is supported.
With this configuration, when the cam member 42 moves in the first direction (downward in the drawing), the pinch arm 53 is driven to the pull-out position to bring the pinch roller 52 into pressure contact with the capstan 55, and the cam member 42 moves. When moving in the unloading direction (left direction in the figure), the pinch arm 53 is driven to the storage position in the cassette 48, and the pinch roller 52 is moved.
Are stored in the cassette 48. The capstan 55
A guide post 56 fixed to a fixing member such as a chassis (not shown) is provided in the vicinity of, and the guide post 35a on the loading block 35 and the tape pulled out by the pinch roller 52 on the front side in the tape running direction. Pressure is applied from the outside to stabilize tape running.

In the tape loading mechanism of FIG. 5 having the above structure, the elastic member 40 absorbs the overstroke, and the loading block 34,
Since 35 can be pressed and held at the tape loading position,
There is an advantage that the dedicated stroke absorbing mechanism can be omitted and the number of parts is reduced accordingly. Further, the mode member 38 of the tape loading mechanism and the mode member (cam member 4) of the pull-out mechanism of the pinch roller 54.
Since 2) is connected via the L-shaped link 41, there is also an advantage that the operation timings of both mechanisms can be easily and surely matched, and smooth tape loading can be performed.

[0012]

However, the conventional tape loading mechanism as described above has the following problems.

First, in the tape loading mechanism shown in FIG. 5, the driving configuration of the loading blocks 34 and 35, which particularly play a major role in pulling out the tape, is complicated, and the number of parts is extremely large. That is, a large number of members such as the cam member 42, the L-shaped link 41, the mode member 38, the elastic member 40, and the drive connecting member 39 are sequentially provided from the driving side. In addition, a link 43 and a loading rotation member 37 are provided between the loading block 35 and the drive connecting member 39, and a link 44 and a loading rotation member 37 are provided between the loading block 34 and the drive connecting member 39. A large number of members such as the rotating member 36 and the three links 45 to 47 are arranged.

Since the two loading blocks 34 and 35 are moved with respect to the rotary drum 31, the guide posts 34a and 35a and the inclined posts 34b and 35b on the two loading blocks 34 and 35 are moved.
It was difficult to position the tape at a predetermined tape loading position with respect to the rotary drum 31 and reliably hold the tape at the same position. Further, since the loading blocks 34 and 35 and a large number of drive-side operation members therefor are provided with a space for arrangement and a space for movement, the arrangement space for various peripheral mechanisms is squeezed, and the entire magnetic recording / reproducing apparatus is designed. There was a major limitation.

The present invention has been proposed in order to solve the problems of the prior art as described above, and an object thereof is to position the guide post and the tilted post with respect to the rotary drum at a predetermined position and to the same position. With a small number of parts that can be easily and securely held, and that contributes to the improvement of the design freedom of the entire magnetic recording / reproducing apparatus without pressing the space for arranging various peripheral mechanisms, It is to provide a tape loading mechanism having a simple structure.

[0016]

The tape loading mechanism of the present invention has the following features. That is, first, it has a drum base which is rotatably provided and supports or integrally forms a rotary drum. A gear portion is formed on the drum base, and a first guide post and an inclined post located inside the tape are closely arranged to support the second guide post located outside the tape. Support. A drive gear that transmits a driving force meshes with the gear portion of the drum base.

More preferably, the cam gear is directly or indirectly engaged with the gear portion of the drum base, and the pinch arm is rotated in conjunction with the cam of the cam gear.
In this case, the pinch arm pivotally supports the pinch roller located inside the tape and also supports the third guide post located inside the tape.

[0018]

The operation of the tape loading mechanism of the present invention having the above construction is as follows.

That is, at the time of tape loading, the drum base rotates in the tape loading direction by rotating the drive gear in a predetermined direction. As the drum base rotates, the first guide post moves from the unloading position inside the cassette toward the outside of the cassette, and the tape is pulled out. Finally, the first guide post reaches the tape loading position, the second guide post abuts from the outside of the tape to form a desired tape path, and the tape loading is completed.

During tape unloading, the drive gear is rotated in the opposite direction to that during tape loading, whereby the drum base rotates in the unloading direction. As the drum base rotates, the second guide post moves away from the outside of the tape, and the first guide post moves from the tape loading position into the cassette. Along with this operation, a reel mechanism provided separately is driven to wind the tape. Then, finally, the first guide post reaches the unloading position in the cassette, and the tape unloading is completed.

As described above, in the present invention, since the first and second guide posts and the inclined post are supported on the drum base, it is possible to rotate the drum base.
These guide posts and tilt posts can be driven. Therefore, as compared with the case where the loading block is used, a large number of driving operation members are completely unnecessary, so that the number of parts of the entire mechanism is remarkably reduced and the configuration is simplified.

Then, in this way, on the drum base,
Since the first and second guide posts and the inclined post are supported together with the rotating drum, the first and second guide posts and the inclined post can be easily positioned at predetermined positions with respect to the rotating drum. In addition, it can be stably held at the same position. Further, as a result of omitting the various operation members, it is not necessary to secure an arrangement space and a movement space for the various operation members, so that the arrangement space for various peripheral mechanisms is not pressed. Therefore, there is an advantage that the degree of freedom in designing the entire magnetic recording / reproducing apparatus can be improved.

In addition, when the pinch arm is interlocked with the drum base via the cam gear, the tape loading operation of the first and second guide posts and the inclined post and the pulling operation of the pinch roller are performed. Since the synchronization can be performed easily and surely, smooth tape loading can be performed. Further, since the pinch arm can be driven by the rotation of the drum base, there is also an advantage that a dedicated drive mechanism for pulling out the pinch roller is not required, which contributes to simplification of the entire apparatus.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the tape loading mechanism according to the present invention as described above will be specifically described with reference to FIGS. Here, FIG. 1 is a plan view showing a tape unloading state, FIG. 2 is a plan view showing an initial state during tape loading, FIG. 3 is a plan view showing a state immediately before completion of tape loading, and FIG. 4 is a tape. It is a top view showing a loading completion state.

First, the configuration of the present embodiment will be described with reference to FIG. That is, in FIG. 1, reference numeral 1 is a rotatably provided drum base, on which a rotary drum 2 is integrally formed. A gear portion 3 is formed on the drum base 1, and a first guide post 4 and an inclined post 5 located inside the tape are provided at one end thereof.
And are supported in close proximity to each other, and the second guide post 6 located outside the tape is supported at the other end.

A drive gear 7 is meshed behind the gear portion 3 of the drum base 1 in the tape running direction (supply side: left side in the figure), and can be rotated by a drive motor (not shown). There is. On the other hand, a cam gear 8 is directly meshed with the gear portion 3 of the drum base 1 in front of the tape running direction (winding side: right side in the drawing). A pinch arm 10 is connected to a cam 8 a of the cam gear 8 via a pinch link 9. That is, the pinch link 9 and the pinch arm 10 are rotatably provided by the shafts 9a and 10a, respectively. The cam follower 9b provided at one end of the pinch link 9 is inserted into the cam 8a of the cam gear 8 and the engagement pin 10 of the pinch arm 10 is inserted into the engagement hole 9c provided at the other end.
By inserting b, the pinch arm 10 is rotated by the rotation of the pinch link 9 as the cam gear 8 rotates.
Is designed to rotate.

A pinch roller 11 located inside the tape is axially supported at one end of the pinch arm 10.
A third guide post 12 located inside the tape is supported. A pressure contact spring 13 is provided at the other end of the pinch arm 10, and urges the pinch arm 10 in the pull-out direction, that is, in the direction in which the pinch roller 11 is pressed against the capstan 14 (clockwise direction in the figure). ing. Further, on the capstan 14 side of the pinch arm 10, there is arranged a fourth guide post 15 for guiding the pull-out end of the tape on the winding side. The fourth guide post 15 is supported by one end of a winding side guide block 16 rotatably provided by a shaft 16a. The winding side guide block 16 is configured to engage with the pinch arm 10 by an engagement portion (not shown) provided coaxially with the fourth guide post 15, and by a spring (not shown), Pinch arm 1
The pinch arm 10 is biased in a storage direction (counterclockwise direction in the drawing) that engages with 0, and rotates in the same direction as the pinch arm 10 rotates.

A fifth guide post 17 is provided behind the drum base 1 in the tape running direction (supply side: left side in the drawing) to guide the pull-out end of the tape on the supply side. The fifth guide post 17 is supported at one end of a V-shaped supply side guide block 18 rotatably provided by a shaft 18a. The other end of the supply-side guide block 18 is connected to a guide link 20 by a shaft 19, and with the movement of the guide link 20, a pull-out direction (counterclockwise direction in the drawing) or a storage direction (clockwise direction in the drawing).
It is designed to rotate. An engaging pin 20a is provided at the other end of the guide link 20 and is inserted into an arc-shaped guide groove 21 provided in a chassis (not shown).
It moves in the guide groove 21. Further, the guide link 20 is the first link in the drum base 1.
Supply guide block 1 configured to engage with an engaging portion 1a provided below the guide post 4 portion of
8 is biased by a storage spring 22 in a storage direction (clockwise direction in the drawing) in which the drum base 1 is engaged.
That is, with the rotation of the drum base 1, the supply side guide block 18 is rotated in the corresponding direction via the movement of the guide link 20.

In the vicinity of the supply side guide block 18, a tension arm 23, a tension post 24, a tension spring 25, and a stopper 26, which constitute a tension control mechanism for controlling the back tension applied to the supply side reel, are provided. ing.
The tension arm 23 is a member rotatably provided by a shaft 23a, and the tension post 2 is provided at one end thereof.
4 are supported. In addition, the tension arm 23,
The tension spring 25 urges the tape pulled out from the cassette in the contact direction (clockwise in the figure) and releases the tape contact by the stopper 26 during tape unloading (counterclockwise in the figure). The position is regulated in the clockwise direction. The stopper 26 is an L-shaped member that is rotatably provided by a shaft 26a. One end of the stopper 26 engages with the tension arm 23, and the other end of the stopper 26 engages with the engagement pin 20a of the guide link 20. It is designed to engage. Further, the stopper 26 is biased by a stopper spring 27 in a restricting direction (clockwise direction in the drawing) that engages with the tension arm 23, and as the drum base 1 rotates, a predetermined drawing direction (upward direction in the drawing).
By engaging the other end of the stopper 26 with the guide link 20 that has moved to, the guide link 20 is pressed by the guide link 20 and is forcedly rotated in the releasing direction (counterclockwise direction in the drawing) for releasing the regulation. Is becoming

The operation of the tape loading mechanism of this embodiment having the above construction is as follows.

First, as shown in FIG. 1, when the cassette 28 is mounted at a predetermined cassette mounting position, the tape loading mechanism is in the tape unloading state. That is, the drum base 1 is in the unloading position (counterclockwise in the drawing), and the first guide post 4 and the inclined post 5 of the drum base 1 are in the unloading position (downward in the drawing) inside the cassette 28.

Therefore, the pinch arm 10 connected to the drum base 1 via the cam gear 8 and the pinch link 9 is moved to the storage position (counterclockwise direction in the drawing) against the biasing force of the pressure contact spring 13. Yes, pinch roller 11
The third guide post 12 and the third guide post 12 are at the storage position (downward in the drawing) in the cassette 28. Along with this, the pinch arm 1
The winding side guide block 16 that engages with 0 is also in the storage position (counterclockwise direction in the drawing), and the fourth guide post 15
Is at the storage position (downward in the drawing) in the cassette 28.

On the other hand, the supply-side guide block 18 is in the storage position (clockwise in the drawing) by the urging force of the storage spring 22, and the fifth guide post 17 is in the storage position (downward in the drawing). Accordingly, the supply side guide block 1
The guide link 20 connected to 8 is also at the storage position (downward in the drawing). In this state, since the stopper 26 is released from the guide link 20, it is biased to the regulation position (clockwise in the figure) by the stopper spring 27, and the tension arm 23 is released to the release position (counterclockwise in the figure). ) Position is regulated.

Next, when the drive gear 7 is rotated in the predetermined tape loading direction (counterclockwise direction in the drawing) from the tape unloading state of FIG. 1, as shown in FIG. 1 starts rotating in the tape loading direction (clockwise direction in the figure). As a result, the first guide post 4 and the inclined post 5 on the drum base 1
Starts moving in the tape loading direction (upper left direction in the figure). By this operation, pulling out of the pull-out end portion on the supply side of the tape 29 is started.

As the drum base 1 rotates, the cam gear 8 meshed with the gear portion 3 of the drum base 1 starts to rotate in the pull-out direction (counterclockwise direction in the drawing), and the cam 8a causes the pinch link. The cam follower 9b of 9 is driven, and the pinch link 9 starts to rotate in the pull-out direction (counterclockwise direction in the drawing). And this pinch link 9
With the rotation of the pinch arm 1 through the engagement hole 9c.
No. 0 engagement pin 10b is pressed, the pinch arm 10 rotates in the pull-out direction (clockwise direction in the drawing), and the pinch roller 1
The first and third guide posts 12 start moving in the pull-out direction (upward in the drawing). Furthermore, the pinch arm 10
The take-up side guide block 16 that engages with also starts rotating in the pull-out direction (clockwise in the drawing), and the fourth guide post 15 starts moving in the pull-out direction (upward in the drawing). By these operations, the pulling-out end portion of the tape 29 on the winding side is started to be pulled out.

On the other hand, at the initial stage of tape loading as shown in FIG. 2, the engaging portion 1a of the drum base 1 is not engaged with the guide link 20 connected to the supply side guide block 18. The supply side guide block 18 is still in the storage position (clockwise in the drawing) by the urging force of the storage spring 22, and the fifth guide post 17 is in the storage position (downward in the drawing). Further, since the guide link 20 is in the storage position (downward in the drawing), the stopper 26 is still released from the guide link 20 and is biased to the regulation position (clockwise in the drawing), and the tension arm 23 is released. The position is regulated (counterclockwise in the figure).

Subsequently, when the drive gear 7 further rotates in the tape loading direction (counterclockwise direction in the drawing) from the state of FIG. 2, the engaging portion 1a of the drum base 1 is connected to the supply side guide block 18. Since the guide link 20 is engaged, the guide link 20 starts to move in the pull-out direction (upward in the drawing) as the drive gear 7 rotates. With the movement of the guide link 20, the supply side guide block 18
Starts rotating in the pull-out direction (counterclockwise direction in the drawing) against the urging force of the storage spring 22, whereby the fifth guide post 17 moves in the pull-out direction (upward in the drawing). To start.

When the drum base 1 further rotates and enters the state of FIG. 3, the engaging pin 20a of the guide link 20 engages with the stopper 26, and the stopper 26 resists the urging force of the stopper spring 27 and is released. (Counterclockwise in the figure)
Rotate to. As a result, the regulation of the tension arm 23 is released, and the tension arm 23 is urged by the tension spring 25 in the contact direction (clockwise direction in the drawing) to come into contact with the pulled-out tape 29 from the outside.

Finally, as shown in FIG. 4, the second guide post 6 comes into contact with the tape 29 from the outside, and
The pinch roller 11 is pressed against the capstan 14 to form a desired tape path, and the tape loading is completed. In this state, the winding end of the tape 29 on the winding side is guided from the inner side by the fourth guide post 15, and the drawing end of the tape 29 on the supply side is guided by the fifth guide post 17. Guided from the inside.

In the tape unloading, the drive gear 7 is rotated in the unloading direction (clockwise in the figure) which is the opposite direction to the tape loading direction from the state shown in FIG. The tape is pulled out by performing an operation opposite to the tape loading, that is, performing a series of operations from the tape loading position or the drawing position to the unloading position or the storing position, and winding the tape by a reel mechanism (not shown). 29 is stored in the cassette 28. The operation flow of the tape loading mechanism in this case is in the order of FIG. 4, FIG. 3, FIG. 2, and FIG.

As described above, in the tape loading mechanism of this embodiment, since the first and second guide posts 4, 6 and the inclined post 5 are supported on the drum base 1, the drum base 1 is supported. The guide posts 4 and 6 and the inclined post 5 can be driven to the tape loading position only by rotating. Therefore, as in the prior art shown in FIG. 5, a member for driving the guide post and the inclined post, which is necessary when the loading block is used, that is, various operating members including the loading block. Can be omitted altogether. Therefore, as is clear by comparing FIGS. 1 and 5, the number of parts of the entire mechanism is significantly reduced, and the configuration is greatly simplified.

Further, in this way, on the drum base 1,
Together with the rotating drum 2, the first and second guide posts 4, 6
Since the tilting post 5 is supported, the positioning of the first and second guide posts 4, 6 and the tilting post 5 with respect to the rotary drum 2 at the tape loading position is performed as compared with the prior art in which they are individually driven. It can be performed easily and with high accuracy, and can be stably and reliably held at the same position. Further, as a result of omitting the various operating members such as the loading block, it is not necessary to secure a space for arranging and moving the various operating members, so that the space for arranging various peripheral mechanisms is not pressed. Therefore, there is an advantage that the degree of freedom in designing the entire magnetic recording / reproducing apparatus can be improved.

In addition, since the pinch arm 10 is interlocked with the drum base 1 via the cam gear 8 and the pinch link 9, the tape loading operation of the first and second guide posts 4 and 6 and the inclined post 5 is performed. , Pinch roller 1
Since the pulling-out operation of No. 1 can be easily and surely synchronized, smooth tape loading can be performed. Further, since the pinch arm 10 can be driven by the rotation of the drum base 1, a dedicated drive mechanism for pulling out the pinch roller 11 is not required, and there is an advantage that the entire device can be simplified accordingly.

On the other hand, in this embodiment, the fourth guide post 15 that guides the pull-out end of the tape 29 on the winding side is interlocked with the pinch arm 10, and the pull-out end of the tape 29 on the supply side is connected. Since the fifth guide post 17 for guiding is configured to be interlocked with the drum base 1, the operations of these guide posts 15, 17 are also performed by the first, second guide posts 4, 6 and the inclined post 5. The tape loading operation can be easily and surely synchronized. Further, the members used for interlocking the fourth and fifth guide posts 15 and 17 are only the guide blocks 16 and 18 and the guide link 20, and the configuration thereof is extremely simple. In addition, since the guide link 20 is interlocked with the stopper 26 for regulating the tension arm 23, the operation control of the tension control mechanism can be performed at an appropriate operation timing, and the entire device can be simplified. You can contribute further.

The present invention is not limited to the above embodiment, and the specific shapes and arrangements of the constituent members can be appropriately changed. For example, a configuration in which the operation control of the tension control mechanism is not performed is possible, and the engagement configuration of each engagement portion can be freely changed. Further, instead of integrally forming the rotary drum on the drum base, it is possible to simply support a separately provided rotary drum.
It is also possible to separately provide a driving mechanism for pulling out the pinch roller. That is, the present invention is characterized in that it supports the first and second guide posts and the inclined post on the drum base. Therefore, as long as the tape loading mechanism has this feature, its specific configuration is Can be freely changed, and as in the case of the above-mentioned embodiment, the same excellent operational effects can be obtained.

[0046]

As described above, according to the present invention, by supporting the first and second guide posts and the inclined post on the drum base, the guide post and the inclined post are positioned at predetermined positions with respect to the rotating drum. Also, it is possible to easily perform reliable holding at the same position, and moreover,
It is possible to provide a tape loading mechanism having a small number of parts and a simple structure that can contribute to an improvement in the degree of freedom in designing the entire magnetic recording / reproducing apparatus without putting pressure on the arrangement space of various peripheral mechanisms. ..

[Brief description of drawings]

FIG. 1 is a plan view showing a tape unloading state in an embodiment of a tape loading mechanism according to the present invention.

FIG. 2 is a plan view showing an initial state during tape loading in the embodiment of FIG.

FIG. 3 is a plan view showing a state just before completion of tape loading in the embodiment of FIG.

FIG. 4 is a plan view showing a tape loading completion state in the embodiment of FIG.

FIG. 5 is a plan view showing an example of a conventional tape loading mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Drum base 1a ... Engagement part 2 ... Rotating drum 3 ... Gear part 4 ... 1st guide post 5 ... Inclined post 6 ... 2nd guide post 7 ... Drive gear 8 ... Cam gear 8a ... Cam 9 ... Pinch link 9a , 10a, 16a, 18a, 19, 23a, 26a
... Shaft 9b ... Cam follower 10 ... Pinch arm 10b, 20a ... Engaging pin 11 ... Pinch roller 12 ... Third guide post 13 ... Pressing spring 14 ... Capstan 15 ... Fourth guide post 16 ... Winding side guide block 17 ... Fifth guide post 18 ... Supply side guide block 20 ... Guide link 21 ... Guide groove 22 ... Storage spring 23 ... Tension arm 24 ... Tension post 25 ... Tension spring 26 ... Stopper 27 ... Stopper spring 28 ... Cassette 29 ... tape

Claims (2)

[Claims] 1. A tape loading mechanism for use in a magnetic recording / reproducing apparatus for recording / reproducing by winding a tape around a rotating drum, wherein the tape is pulled out from a cassette loaded in the apparatus and wound around a rotating drum. And a drum base that supports or integrally forms the rotary drum, a gear portion formed on the drum base, and a first guide post that is supported by the drum base and is located inside the tape. An inclined post that is supported in the vicinity of the first guide post in the drum base and is located inside the tape; a second guide post that is supported by the drum base and is located outside the tape; meshes with the gear portion; A tape loading mechanism comprising: a drive gear that transmits a driving force. 2. A cam gear that directly or indirectly meshes with a gear portion of the drum base, a pinch arm that rotates in conjunction with a cam of the cam gear, and a pinch that is axially supported by the pinch arm and is located inside the tape. 2. A roller and a third guide post, which is supported by the pinch arm and is located inside the tape, are provided.
The tape loading mechanism described in.