JP3040183U - Magnetic tape unit - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To improve the feeling of insertion of a tape cassette. SOLUTION: Just before the cradle 5 is moved in the direction opposite to the arrow c to reach the cassette insertion position A, the connection between the lever 25 connected to the cradle 5 and the rack 26 linked to the motor 10 is released. A clutch mechanism 50 for connecting the cradle 5, the lever 25, and the rack 26 is provided immediately after the cradle 5 is retracted from the cassette insertion position A, and the cradle 5 waiting at the cassette insertion position A is retracted. An urging means 58 is provided for urging the pedestal 5 so that the pedestal 5 is not biased and the pedestal 5 is retracted by the pushing force when the tape cassette T is inserted.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a magnetic tape device for recording, reproducing or erasing on a magnetic tape.

[0002]

[Prior art]

 Conventionally, as an example of this type of magnetic tape device, a cradle that can reciprocate back and forth between a cassette insertion position and a cassette mounting position and a drive for moving the cradle through an interlocking mechanism. A device, and the interlocking mechanism includes a cradle side interlocking part connected to the pedestal, a drive device side interlocking part interlockingly connected to the drive device, and a spring connecting both interlocking parts. By inserting the tape cassette into the cradle waiting at the cassette insertion position, the cradle is slightly retracted against the spring, and the drive device rotates normally based on the detection signal that detects it. When driven, the cradle is retracted to the cassette loading position via the interlocking mechanism, and the tape cassette eject button is pressed, whereby the drive device is reversely driven and the cradle is loaded onto the cassette via the interlocking mechanism. Insert the cassette from the placement position There are those to be advanced to the position.

[0003]

[Problems to be solved by the device]

 In the above structure, the cradle side interlocking part and the drive device side interlocking part are connected by the spring, and the tape cassette is inserted into the cradle waiting at the cassette insertion position, and the tape cassette is pushed in to move the cradle. When the tape was slightly retracted, the urging force of the spring increased as it was pushed in, so the feeling of inserting the tape cassette was extremely poor.

In view of the above problems, it is an object of the present invention to provide a magnetic tape device having a good feeling of insertion of a tape cassette.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the invention according to claim 1 is based on a detection signal for detecting that the cradle is slightly retracted by inserting the tape cassette into the cradle waiting at the cassette insertion position. The drive device is driven in the forward direction to retract the cradle to the cassette loading position via the interlocking mechanism, and the tape cassette eject button is pressed, whereby the drive device is driven in the reverse direction to drive through the interlocking mechanism. In a magnetic tape device configured to move the cradle forward from the cassette mounting position to the cassette insertion position, the cradle and the interlocking mechanism are disconnected immediately before the cradle is advanced to reach the cassette insertion position. In addition, a clutch mechanism that connects the cradle and the interlocking mechanism is provided immediately after the cradle is retracted from the cassette insertion position, and the cradle waiting at the cassette insertion position is retracted. No way urges, is characterized by biasing means for permitting retraction of the cradle lost the pushing force when to insert the tape cassette receiving stand is provided.

In the above structure, when the tape cassette is inserted into the cradle waiting at the cassette insertion position, the urging means loses the pushing force at the time of the insertion and allows the cradle to retreat. The drive device is driven in the normal direction by a detection signal that detects a slight retreat, and in conjunction with this, the clutch mechanism connects the pedestal to the drive device through the interlocking mechanism, and the drive device mounts the pedestal on the cassette. Retract to the rest position. When the tape cassette eject button is pressed, the drive device is driven in reverse to advance the cradle via the interlocking mechanism, and immediately before the cradle reaches the cassette insertion position, the cradle mechanism is used to crawl the cradle. The connection with the interlocking mechanism is released and the urging means causes the pedestal to stand by at the cassette insertion position.

In this case, the clutch mechanism is disengaged in a state in which the cradle is on standby in the cassette insertion position, the coupling between the cradle and the interlocking mechanism is released, and the cradle is prevented from retracting the cradle. Therefore, by inserting the tape cassette into the cradle waiting at the cassette insertion position, the cradle can be easily retracted and a good tape cassette insertion feeling can be obtained.

A second aspect of the invention is the device of the first aspect, wherein the interlocking mechanism is a pedestal side interlocking portion connected to the pedestal, and a drive device side interlocking portion interlockingly connected to the drive device. And a clutch lever that is pivotally supported by the drive unit-side interlocking unit and has a front end that can be engaged with and disengaged from a clutch groove formed in the cradle-side interlocking unit. A spring for urging the tip of the lever toward the clutch groove, and a clutch operating portion that is operated by a drive device facing the operated portion provided at the rear end of the clutch lever, Immediately before advancing the cradle to reach the cassette insertion position, the clutch operating part is engaged with the operated part to disengage the tip of the clutch lever from the clutch groove, and the cradle is inserted into the cassette. Immediately after retracting from the position, The operation portion is separated from the operated portion so that the tip end portion of the clutch lever is engaged with the clutch groove.

According to the above configuration, the tip of the clutch lever can be disengaged from the clutch groove and the clutch mechanism can be reliably disengaged immediately before the cradle is advanced to reach the cassette insertion position. Immediately after the table is retracted from the cassette insertion position, the tip of the clutch lever can be engaged with the clutch groove to securely insert the clutch mechanism.

A third aspect of the present invention is the device of the first or second aspect, wherein the interlocking mechanism includes a lever extending rearward from a substantially central portion of the pedestal and a front end portion of the lever. A rack provided so as to be movable along the rear direction, a cam pin projecting at a proper position in the front part of the lever, and a support provided upright adjacent to a rotating body provided rotatably behind the pedestal. A shaft, a pinion rotatably provided on the support shaft and interlockingly connected to the rotating body, and a pinion engageable with the rack, and a pinion rotatably provided on the support shaft and rotatably interlockingly connected. And a helical cam groove formed on the outer peripheral surface thereof and a cam body engageable with the cam pin, the clutch mechanism is pivotally supported by the rack, and a tip portion of the clutch mechanism is formed on the lever. Clutch lever that can be engaged with and disengaged from the groove, and the clutch There is a spring for urging the tip of the lever toward the clutch groove, and a clutch operating portion provided on the pinion facing the operated portion provided on the rear end of the clutch lever. Immediately before advancing the table to reach the cassette insertion position, the clutch operation part is engaged with the operated part to disengage the tip of the clutch lever from the clutch groove, and the cradle is inserted into the cassette insertion position. Immediately after being retracted from, the clutch operating portion is separated from the operated portion so that the tip end portion of the clutch lever is engaged with the clutch groove.

According to the above construction, the same effect as the invention of claim 2 can be obtained, and at the same time, the interlocking mechanism (cam body, pinion, rack and lever) for interlockingly connecting the pedestal and the rotating body. ) Are concentrated, the structure is simple, the number of parts is small, and the manufacturing cost can be reduced. In addition, since there is no component that requires a large frictional resistance or a large driving force among the components of the interlocking mechanism, a small driving force, a small size, and an inexpensive one are sufficient as a driving source for the rotating body. Production costs can be reduced.

A fourth aspect of the present invention is the device according to any one of the first to third aspects, in which a pair of left and right support pins provided on both sides of the pedestal are provided on the sides of the pedestal. Is movably inserted into a substantially L-shaped guide hole formed in the guide plate, and the biasing means is left uncut between the guide hole and a communication hole communicating with the front end of the guide hole. It is characterized in that the front end thereof is formed by an elastically deformable tongue protruding into the guide hole.

According to the above structure, the urging means is formed by the elastically deformable tongue piece left uncut between the guide hole and the communication hole of the guide plate, so that the number of parts does not increase and the manufacturing cost is reduced. You can be cheap.

[0014]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show an embodiment of the present invention, in which a pair of guide plates 2 and 2 provided on both front edges of a chassis 1 are provided with substantially L-shaped guide holes 3 and 4, respectively. , Support pins 6,6 protruding from both side wall portions 5a, 5a of a pedestal 5 having a substantially U-shape in a front view arranged between the guide plates 2, 2 are inserted into the guide holes 3, 4. The pedestal 5 is configured to be movable between the cassette insertion position A and the cassette mounting position B along the guide holes 3 and 4.

A disk-shaped rotating body 8 is rotatably disposed behind the chassis 1, and a motor (driving device) 10 is mounted on a support frame 9 fixed to the chassis 1 so as to cover the rotating body 8. A worm gear 14, which is operatively connected to the motor 10 via pulleys 11 and 12 and a belt 13, is meshed with a driven gear 15 formed on the outer peripheral surface of the rotating body 8. The rotating body 8 is driven by the motor 10. It can rotate forward and backward.

A lever (receiver side interlocking portion) 25 is extended rearward from a substantially central portion of the pedestal 5, and the lever 25 includes a base end portion 25 a extending rearward from the base plate portion 5 b of the pedestal 5, It comprises a rising portion 25b extending upward from the rear end of the base end portion 25a and a tip portion 25c extending rearward from the upper end of the rising portion 25b, and a rack (driving device side interlocking portion) 26 is provided on the tip portion 25c. A cam pin 27 is provided on the tongue portion 25d provided near the upper end of the rising portion 25b, and a supporting shaft 28 is erected adjacent to the rotating body 8 on the chassis 1. A pinion 29 engageable with the rack 26 and a cylindrical cam body 31 having a spiral cam groove 30 engageable with the cam pin 27 are rotatably provided, and the cam body 31 and the rotary body 8 are separated from each other. , The cam body side gear 32 formed on the outer peripheral surface thereof, The rotating body side gear 33 is interlocked and coupled by meshing with each other (see FIG. 10), and the pinion 29 and the cam body 31 are integrally coupled.

A lever-side long hole 46 is formed in the front end portion 25 c of the lever 25 along the front-rear direction, and a vertical shaft 47 penetrating the lever-side long hole 46 is provided on the chassis 1 and the rack 26 By engaging the rack-side elongated hole 48 formed along the front-rear direction with the vertical shaft 47 and the vertical pin 49 projecting from the front end of the tip portion 25 c of the lever 25, the rack 26 thereof is attached to the tip of the lever 25. It is mounted on the portion 25c so as to be movable within a certain range in the front-rear direction.

A clutch mechanism 50 is provided between the tip 25c of the lever 25 and the rack 26. This is rotatably supported by a bracket 51 protruding from the rear of the rack 26 via a pivot shaft 52, and a tip portion 53a thereof can be engaged with and disengaged from a cam groove 54 formed in a tip portion 25c of the lever 25. Clutch lever 53, a spring 55 for urging the tip end portion 53a of the clutch lever 53 toward the clutch groove 54, an operated portion 53b extending from the rear end portion of the clutch lever 53 toward the pinion 29, and the pinion 29. Has a rod-shaped clutch operating portion 56 protruding from the upper surface thereof and having a tip end facing the operated portion 53b. As shown in FIG. 8, the clutch groove 54 is formed between a substantially triangular front projection 54 a and a substantially rectangular rear projection 54 b that are provided on the side edge of the rack 26.

A biasing means 58 is provided on the guide plates 2 and 2. As shown in FIG. 8, this is left uncut between the lower guide holes 3 and 4 and a substantially L-shaped communication hole 59 that communicates with the front ends of the guide holes 3 and 4, and the tip 58a thereof is formed. Is formed by an elastically deformable tongue piece 58A protruding into the guide holes 3 and 4, and of the front outer peripheral surface 60 and the rear outer peripheral surface 61 which are formed in a substantially V shape of the tip portion 58a. The front outer peripheral surface 60 biases the support pin 6 forward, and the rear outer peripheral surface 61 biases the support pin 6 rearward.

As shown in FIGS. 1 and 2, a prism type light projecting portion 22 is provided in the central portion of the chassis 1, and a prism type light receiving portion 23 is provided on each of the guide plates 2 and 2. The tape end detection light is projected from the portion 22 to the light receiving portion 23. Further, a blocking piece 37 for blocking the tape end detection light is integrally provided on the rising portion 25b of the lever 25 (see FIG. 9). Further, in FIG. 2, 38 is a supply reel, 39 is a take-up reel, and 40 is pivotally supported by the chassis 1 so as to be swingably supported to selectively engage with the reels 38 and 39. An idler for rotating 3 and 41 are leaf springs for pressing the upper surface of the tape cassette T attached to the upper end of the side wall portion 5a of the pedestal 5.

In the above structure, as shown in FIGS. 2 and 5, when the cradle 5 is on standby at the cassette insertion position A, the clutch operating portion 56 presses the operated portion 53b and the clutch lever 53 moves. The tip end 58a of the clutch lever 53 is disengaged from the clutch groove 54 to disengage the clutch mechanism 50, and the support pins 6 and 6 of the pedestal 5 are rotated by the spring 55 against the spring 55. The pedestal 5 is prevented from retracting c from the cassette insertion position A by being biased by the front outer peripheral surface 60 of the tip portion 58a [see FIGS. 8 (a) and 8 (b)].

When the tape cassette T is inserted into the cradle 5 standing by at the cassette insertion position A, the urging means 58 loses the pushing force at the time of the insertion to allow the cradle 5 to move backward c (see FIG. a) See virtual line].

In this case, the clutch mechanism 50 is disengaged, the connection between the pedestal 5 and the motor 10 is released, and the urging means 58 only prevents the pedestal 5 from being retracted c. By inserting T into the cradle 5 waiting at the cassette insertion position A, the cradle 5 can be easily retracted c and a good feeling of inserting the tape cassette T can be obtained.

When the support pins 6, 6 of the pedestal 5 pass through the tip 58a of the urging means 58, the support pins 6, 6 are urged rearward by the rear outer peripheral surface 61 of the tip 58a, so that the pedestal When the tape end detection light 5 projected from the light projecting section 22 to the light receiving section 23 is blocked by the blocking piece 37 (see FIG. 9), the signal is detected by the detection signal. The rotor 10 is driven in the forward direction, the rotor 8 is driven in the forward direction a via the pulleys 11 and 12, the belt 13, the worm gear 14, and the driven gear 15, and the cam body 31 and the pinion 29 are rotated in the direction of arrow b. It As a result, the clutch operating portion 56 is separated from the operated portion 53b, and the tip portion 53a of the clutch lever 53 is brought into contact with the rack 26 by the spring 55 (see FIGS. 8C and 8D).

Subsequently, the pinion 29 is rotated in the direction of arrow b, the rack 26 meshing with the pinion 29 is retracted c, and the tip end portion 53 a of the clutch lever 53 engages with the clutch groove 54. The clutch mechanism 50 is inserted, the lever 25 and the rack 26 are integrally connected [see FIGS. 8 (e) and 8 (f)], and the pedestal 5 also extends along the horizontal portions 3a, 4a of the guide holes 3, 4 via the lever 25. It is retreated c.

Next, as shown in FIGS. 3 and 6, the cam pin 27 is engaged with the upper end portion of the cam groove 30 of the cam body 31, and the cam pin 27 is rotated by the rotation in the direction of the arrow b. It is lowered along the cam groove 30 (at the same time, the meshing state between the pinion 29 and the rack 26 is released), and the pedestal 5 is also moved along the vertical portions 3b 1 and 4b of the guide holes 3 and 4 via the lever 25. It is lowered, and the tape cassette T on the receiving table 5 can be set at the cassette mounting position B as shown in FIGS. 4 and 7.

Next, by pressing the tape cassette eject button from the state shown in FIGS. 4 and 7, the rotating body 8 is reversely driven in the reverse direction of a, and the cam body 31 and the pinion 29 rotate in the reverse direction of arrow b. To be done. As a result, as shown in FIGS. 3 and 6, the cam pin 27 is raised along the cam groove 30 of the cam body 31, and the pedestal 5 is also moved to the vertical portions 3b and 4b of the guide holes 3 and 4 via the lever 25. Be raised along. Then, the pinion 29 is meshed with the rack 26, the rack 26 is advanced in the direction opposite to the arrow c, and the pedestal 5 is also advanced via the lever 25.

Immediately before the cradle 5 arrives at the cassette insertion position A, the operated portion 53b is pressed by the clutch operating portion 56, the tip portion 53a of the clutch lever 53 is disengaged from the clutch groove 54, and the clutch mechanism is released. At the same time when the connection between the rack 26 and the lever 25 is released when 50 is broken, the support pins 6 and 6 of the pedestal 5 pass under the tip 58a of the biasing means 58, and the pedestal 5 is inserted into the cassette insertion position. The tape cassette T can be taken out from the cradle 5 by advancing it to A [see FIGS. 8 (a) and 8 (b)] (see FIGS. 2 and 5).

According to the above configuration, the interlocking mechanism (the cam body 31, the pinion 29, the rack 26 and the lever 25) that interlocks and connects the pedestal 5 and the rotating body 8 is provided centrally on the chassis 1. The structure is simple, the number of parts is small, and the manufacturing cost can be reduced. Further, since there is no component of the interlocking mechanism that requires a large frictional resistance or a large driving force, it is sufficient that the motor 10 for driving the rotating body 8 has a small driving force, is small, and is inexpensive. In terms of points, the production cost can be reduced.

As shown in FIG. 5, the rotator-side gear 33 is part of the rotator 8 only at a predetermined angle α (about 90 ° in this embodiment) that allows the pedestal 5 to move downwards and downwards and upwards to advance. Immediately after the tape cassette T inserted into the receiving table 5 is set in the cassette mounting position B (states of FIGS. 4 and 7), the cam body side gear 32 is disengaged from the rotating body side gear 33, It prevents the cam body 31 from rotating further.

As shown in FIG. 10, a peripheral wall portion 64 is integrally formed on a portion of the outer peripheral portion of the rotating body 8 other than the formation angle α of the rotating body side gear 33, and the peripheral wall portion is formed on the outer peripheral surface of the lower end portion of the cam body 31. Since the planar portion 65 that can be engaged with 64 is formed, when the cam body side gear 32 is disengaged from the rotating body side gear 33, the peripheral wall portion 64 has the planar portion 65 as shown in FIG. 10B. The cam body 31 is not rotated by being engaged with the cam pin 27, and the pedestal 5 can be reliably prevented from moving up and down unexpectedly via the cam pin 27 that engages with the cam groove 30.

[0032]

[Effect of the invention]

 According to the first aspect of the present invention, the clutch mechanism is disengaged when the cradle is in the standby position at the cassette insertion position, the coupling between the cradle and the interlocking mechanism is released, and the cradle is used to move the cradle. Since the tape cassette is not moved backward, it can be easily retracted by inserting the tape cassette into the cradle that stands by at the cassette insertion position to obtain a good feeling of inserting the tape cassette. it can.

According to the second aspect of the present invention, the tip of the clutch lever can be disengaged from the clutch groove to immediately disengage the clutch mechanism immediately before the cradle is advanced to reach the cassette insertion position. Immediately after retracting the cradle from the cassette insertion position, the tip of the clutch lever can be engaged with the clutch groove to securely insert the clutch mechanism.

According to the third aspect of the invention, the same effect as that of the second aspect of the invention can be obtained, and at the same time, the interlocking mechanism (the cam body, the pinion, the rack) for interlockingly connecting the pedestal and the rotating body. And lever) are centrally installed, the structure is simple, the number of parts is small, and the manufacturing cost can be reduced. Also, since there is no component that requires a large friction resistance or a large driving force among the components of the interlocking mechanism, a small driving force with a small driving force is sufficient as a driving source for the rotating body. Can be cheaper.

According to the invention of claim 4, the biasing means is formed by the elastically deformable tongue left between the guide hole and the communication hole of the guide plate, and the number of parts does not increase. , The production cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic tape device according to an embodiment of the present invention.

FIG. 2A is a plan view showing a state in which the tape cassette is inserted, and FIG. 2B is a side view of the same.

FIG. 3A is a plan view of the tape cassette in the middle of transfer, and FIG. 3B is a side view of the same.

FIG. 4 is a side view showing a state in which the tape cassette is set at a cassette mounting position.

FIG. 5 (a) is a plan view of a main part with the tape cassette inserted, and FIG. 5 (b) is a front view of the same.

FIG. 6A is a plan view of a main part of the tape cassette during a transfer, and FIG. 6B is a front view thereof.

FIG. 7A is a plan view of an essential part of the tape cassette set to a cassette mounting position, and FIG. 7B is a front view of the same.

8A to 8F are a side view and a perspective view of a main part showing an operating state of a biasing unit and a clutch mechanism.

FIG. 9 is a transverse sectional view of the same.

10A is a perspective view showing a relationship between the rotating body and a cam body, and FIG. 10B is a horizontal sectional view thereof.

[Explanation of symbols]

 2 guide plate 3 guide hole 4 guide hole 5 pedestal 6 support pin 8 rotating body 10 motor (driving device) 25 lever (pedestal side interlocking part) 26 rack (driving device side interlocking part) 27 cam pin 28 spindle 29 pinion 30 Cam groove 31 Cam body 50 Clutch mechanism 53 Clutch lever 53a Clutch lever tip portion 53b Operated portion 54 Clutch groove 55 Spring 56 Clutch operating portion 58 Energizing means 58A Tongue piece 58a Tongue tip portion A Cassette insertion position B Cassette loading Position T Tape cassette

[Procedure amendment]

[Submission date] March 31, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (4)

[Utility model registration claims] 1. A tape cassette is inserted into a cradle that stands by at a cassette insertion position, the cradle is slightly retracted, and a drive device is driven to rotate normally based on a detection signal for detecting the cradle to operate the interlocking mechanism. The cradle is retracted to the cassette loading position via the tape cassette eject button and the drive device is reversely driven to move the cradle from the cassette loading position to the cassette insertion position via the interlocking mechanism. In the magnetic tape device that is moved forward, the cradle and the interlocking mechanism are disconnected immediately before the cradle is moved forward to reach the cassette insertion position, and the cradle is retracted from the cassette insertion position. Immediately after that, a clutch mechanism for connecting the pedestal and the interlocking mechanism is provided to urge the pedestal standing by at the cassette insertion position so as not to move backward, and the pedestal to the pedestal. 1. A magnetic tape device, comprising: a biasing means that loses the pushing force when inserting the cassette and allows the pedestal to retract. 2. The interlocking mechanism includes a cradle side interlocking part connected to the pedestal and a drive device side interlocking part interlockingly connected to the drive device, and the clutch mechanism includes the drive device. A clutch lever that is pivotally supported by the side interlocking part and has a distal end engageable with and disengageable from a clutch groove formed in the cradle side interlocking part; a spring that biases the distal end of the clutch lever toward the clutch groove; A clutch operating portion that is operated by a drive device facing the operated portion provided at the rear end portion of the lever, and the clutch operating portion is provided immediately before the cradle is advanced to reach the cassette insertion position. Section is engaged with the operated section to disengage the tip of the clutch lever from the clutch groove, and the clutch operating section is separated from the operated section immediately after retracting the cradle from the cassette insertion position. Lever tip The magnetic tape device according to claim 1, wherein the magnetic tape device is configured to be engaged with the clutch groove. 3. The lever includes a lever extending rearward from a substantially central portion of the pedestal, a rack provided at a tip portion of the lever so as to be movable in the front-rear direction, and a lever of the lever. A cam pin projecting at a proper position in the front part, and a support shaft standing upright adjacent to a rotating body rotatably provided at the rear of the pedestal,
A pinion rotatably provided on the support shaft and interlockingly connected to the rotating body, and a pinion engageable with the rack, and rotatably provided on the support shaft rotatably and interlockingly, and an outer periphery. The spiral cam groove formed on the surface has a cam body engageable with the cam pin, the clutch mechanism is pivotally supported by the rack, and the tip end thereof can be engaged with and disengaged from the clutch groove formed in the lever. A clutch lever, a spring for urging the tip of the clutch lever toward the clutch groove, and a clutch operating portion provided on the pinion facing the operated portion provided at the rear end of the clutch lever. Immediately before reaching the cassette insertion position by advancing the cradle, the clutch operating portion is engaged with the operated portion to disengage the tip end portion of the clutch lever from the clutch groove. Kase 2. The magnetic tape according to claim 1, wherein the clutch operating portion is separated from the operated portion immediately after being retracted from the insertion position so that the tip end portion of the clutch lever is engaged with the clutch groove. apparatus. 4. Support pins projecting from both sides of the pedestal are movably inserted into substantially L-shaped guide holes formed in a pair of left and right guide plates provided on the side of the pedestal. The biasing means is formed by an elastically deformable tongue piece which is left uncut between the guide hole and a communication hole communicating with the front end of the guide hole, and the tip of which is projected into the guide hole. The magnetic tape device according to claim 1, wherein the magnetic tape device is a magnetic tape device.