JPH03176847A - Reel driving device in tape player - Google Patents

Abstract

PURPOSE:To obtain satisfactory performance in recording/reproduction and a case other than the recording/reproduction by arranging a spring between a drum and a reel arranged at a fixed shaft rotatably freely and fitted loosely with each other. CONSTITUTION:The supporting member 23 of a drum 20 is arranged in the inside of the recessed part 32 of the reel 30, and also, the supporting member 33 of the reel 30 is arranged in the inside of the recesses part 22 of the drum 20, and the spring 40 is connected between the supporting members 23 and 33. Therefore, no direct contact of the drum 20 with the reel 30 occurs in the recording/reproduction, and the rotary driving of the drum 20 is transmitted to the reel 30 via the spring 40, and also, micro oscillation due to a motor and a transmission mechanism in the recording/reproduction can be absorbed in the spring 40, then, it is not transmitted to the reel 30. Also, in the case other than the recording/reproduction, the drum 20 is directly brought into contact with the reel 30, and the rotary driving of the drum 20 is transmitted to the reel 30 without generating loss. In such a way, the satisfactory performance can be obtained in both the recording/reproduction and the case other than that.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention has a spring disposed between a drum and a reel which are rotatably disposed on a fixed shaft and are loosely fitted to each other. The action of the drum differs between recording and playback and non-recording and playback, and the drum is connected to the reel indirectly, directly,
The present invention relates to a reel drive device in a tape player that can obtain good performance in both grips because of contact.

[Prior Art] As shown in FIG. 4, in a conventional tape player, in order to transmit rotational driving force to the reel 2 that winds the magnetic tape 1, there is a connection between the motor 3 serving as the driving source and the reel 2. A transmission mechanism for transmitting rotational driving force to the reel 2 is disposed. The reel 2 is rotated on the chassis 4 with its lower shaft 2A mounted on a spring support 5 disposed on the chassis 4, and its upper shaft 2B mounted on a fixed shaft 6 erected and fixed on the chassis 4. freely supported. The transmission mechanism is
It is composed of a pulley 7, an idler 8, a drum 9, and a felt 10. The drum 9 is rotatably mounted on the fixed shaft 6, and also has a spring support 5 and a support base 2 for the reel 2.
a spring 11 disposed between the spring support 5 and the spring support 5;
The felt 10 is pressed onto the lower surface of the support base 2c of the reel 2. The rotational driving force from the motor 3 is
It is transmitted from the pulley 7 to the drum 9 via the idler 8. This drum 9 is pressed to the felt 10 by the spring 11, and at the same time, the felt 10 is pressed to the support base of the reel 2, so the rotational driving force of the drum 90 is transmitted to the reel 2 via the felt IO, and the felt 10 is pressed to the support of the reel 2. 2, the magnetic tape 1 can be wound up.

The felt 10 transmits the rotational driving force of the drum 9 to the reel 2, and also absorbs and blocks unnecessary vibrations caused by the motor 3 and the transmission mechanism during recording and reproduction.

In FIG. 4, 12 is a capstan, 13 is a pinch roller, 14 is a metal head, 15 is a cassette pack, 16 is a spring, and 17 is a reel support.

[Problems to be Solved by the Invention] In this prior art, the rotational driving force of the drum 9 is always transmitted to the upper reel 2 via the felt 10, and the drum 9 never comes into direct contact with the reel 2. . Therefore, if the pressure force of the spring 11 of the felt 10 is set so as to absorb minute vibrations caused by the motor 3 and the transmission mechanism during recording and reproduction, the high rotational driving force required at times other than recording and reproduction can be transmitted. At this time, there is a limit to the transmission due to slippage, and the magnetic tape 1 cannot be quickly wound up. Furthermore, if the pressure force is set so that the high-speed driving force can be transmitted, the vibrations during recording and reproduction cannot be absorbed within the felt 10, and the vibrations are directly transmitted to the magnetic tape 1 through the reel 2. , which adversely affects tape running. As described above, in the prior art, there is a problem in that when one is improved, the other is deteriorated, and good performance cannot be obtained in both cases.

In order to solve the above-mentioned problem, it may be possible to provide completely different transmission mechanisms for recording/reproduction and for times other than recording/reproduction, but the transmission mechanism becomes complicated and cannot be adopted at all.

This invention was made with the aim of solving the problems of the prior art.

[Means for Solving the Problems] Means for solving the above problems will be explained below using FIG. 1 corresponding to the embodiment. The present invention provides a tape player having a reel 30 for winding a magnetic tape, a motor serving as a drive source for the reel 30, and a transmission mechanism transmitting rotational driving force from the motor to the reel 30. A support member 23 is erected on the bottom surface 22A of the ring-shaped recess 22 dug in the recess 21, and a stopper 23 is provided on the outer surface 22B of the recess 22 in parallel with the main shaft 24.
The drum 20 on which the number 5 is protruded is rotatably supported on the chassis 4 by mounting the main shaft 24 on a fixed shaft 6 that is erected and fixed on the chassis 4, and the drum 20 is rotatably supported on the chassis 4. A support member 33 is suspended from an upper surface 32A of a ring-shaped recess 32 dug in the recess 32.
A portion of the outer surface 32B of the lower shaft 34. The reel 30, which has a slit 35 cut out parallel to A, has the lower shaft 34A mounted on the main shaft 24 of the drum 20, and the upper shaft 34B mounted on the fixed shaft 6, so that the reel 30 is mounted on the drum 20. The stopper 25 is disposed inside the slit 35, and the support member 23 of the drum 20 is disposed inside the recess 32 of the reel 30. It is characterized in that a member 33 is arranged inside the recess 22 of the drum 20, and a spring 40 is connected between the support members 23, 33.

Further, the present invention provides a spring 4 as shown in FIG. 3(c).
0 is characterized in that it is disposed between the stopper 25 and the slit 35.

[Function] With this configuration, the drum 20 does not come into direct contact with the reel 30 during recording and reproduction, and the rotational driving force of the drum 20 is transmitted to the reel 30 via the spring 40. At the same time, minute vibrations caused by the motor and transmission mechanism during recording and reproduction are absorbed by the spring 40 and the reel 3
0 is not transmitted.

Furthermore, at times other than recording and reproduction, the drum 20 is in direct contact with the reel 30, and the rotational driving force of the drum 20 is transmitted to the reel 30 without loss.

[Example] FIG. 1 is a diagram showing an embodiment of the present invention.

In FIG. 1, 20 is a drum, 30 is a reel, and 40 is a spring.

The drum 20 is rotatably supported on the chassis 4 with its main shaft 24 attached to a fixed shaft 6 that is erected and fixed on the chassis 4 . A ring-shaped recess 22 is bored in the upper surface portion 21 of the drum 20. Bottom surface 22 of recess 22
A support member 23 is erected at A, and the outer surface 22 of the recess 22
A stopper 25 is provided protruding from B in parallel with the main shaft 24.

The lower shaft 34A of the reel 30 is connected to the main shaft 2 of the drum 20.
4, and its upper shaft 34B is attached to the fixed shaft 6 and loosely fitted onto the drum 20 so as to be rotatable. A ring-shaped recess 32 is bored in the lower surface of the support stand 31 of the reel 30. A support member 33 is suspended from the upper surface 32A of the recess 32, and a part of the outer surface 32B of the recess 32 is attached to the lower shaft 34A.
A slit 35 is formed by cutting parallel to the .

The length of the arc of the slit 35 is larger than the width of the stopper 25. Within this arc length range, the drum 20
is movable with respect to the reel 30. reel 3
A part of the support base 31 of the reel 30 is disposed inside the recess 22 of the drum 20, and the support member 33 of the reel 30 is disposed inside the recess 22 of the drum 20.
The support member 2 of the drum 20 is disposed inside the recess 22 of the drum 20.
3 or the stopper 25 is arranged inside the recess 32 or slit 35 of the reel 30. The reel 30 and the drum 20 do not have a perfect vertical relationship as in the prior art, but partially overlap and are in the same line relationship with respect to transmission of rotational driving force.

The spring 40 is a torsion spring, and its center ring 0 portion is loosely fitted to the main shaft 24 of the drum 20 and its bottom surface 22
A, and both ends 40A and 40B are supported by support members 23
．． 33. The spring constant of the spring 40 is such that during recording and reproduction, the stopper 2
5 leaves one end of the slit 35, and one end 4OA
so that the force of the other end 40B of the spring 40 generated by the external force received by the reel 30 has a value corresponding to the rotational driving force (winding torque) necessary for the reel 30 to wind up the magnetic tape, and
At this time, the stopper 25 is set so as not to come into contact with the other end of the slit 35, and the stopper 25 is set so as not to come into contact with the other end of the slit 35 except during recording and reproduction that requires high rotational driving force. ing. In addition, slit 3
The length of the arc 5 and the width of the stopper 25 are determined such that the stopper 25 is located at the center of the slit 35 during recording and reproduction, for example.

These assemblies are performed by placing the spring 40 on the drum 20 and bringing its one end 4OA into contact with the support member 23, then fitting the reel 30 onto the drum 20, and then attaching the reel 30 to the support base 31 of the reel 30.
A rod-shaped object is inserted into a hole (not shown) drilled in the support member 3, and the other end 40B of the spring 40 is rotated clockwise.
3 and the other end 40B is brought into contact with the support member 33. The reel 30 rotates counterclockwise due to the restoring force of the other end 40B, and one end of the slit 35 and the stopper 25 are in pressure contact (see FIG. 2(a)).

The rotational driving force is transmitted from a motor (not shown) to the drum 20 via the pulley 7 and the idler 8, and the drum 20 rotates around the fixed shaft 6. supported by the drum 20,
An external force (indicated by a solid line) corresponding to a rotational driving force is received by the support member 23, and a force (indicated by a broken line) at the other end 40B of the spring 40 generated by this external force is applied to the support member 33 provided on the reel 30. Thereby, the reel 30 can rotate around the fixed shaft 6 (indicated by a white arrow) and wind up the magnetic tape (see FIG. 2).

When the drum 20 and reel 30 are stopped, the second
As shown in Figure (a), one end 1 2 of the slit 35 and the stopper 25 are in pressure contact. Then, during recording and reproduction, the state is as shown in FIG. 2(b). That is, the drum 20 does not come into direct contact with the reel 30, and the rotational driving force of the drum 20 is transmitted to the reel 30 via the spring 40. Then, while maintaining the state shown in FIG. 2(b), the drum 20 is
and the reel 30 rotates around the fixed shaft 60. Slight vibrations caused by the motor and transmission mechanism during recording and reproduction are absorbed by the spring 40 and are not transmitted to the reel 30.

In addition, at times other than recording and reproduction, the state is as shown in FIG. 2(C). That is, the drum 20 is in direct contact with the reel 30, and the rotational driving force of the drum 20 is directly transmitted to the reel 30 without loss. Then, the drum 20 and reel 30 rotate around the fixed shaft 6 while maintaining the state shown in FIG. 2(C).

As described above, in the present invention, the rotational driving force of the drum 20 is transmitted to the reel 30 not in a vertical relationship as in the prior art, but in a same-column relationship.

During recording/playback and other times, the drum 2
0 and the reel 30, in other words, the position of the stopper 25 in the slit 35 is different. Moreover, the elastic force of the spring 40 changes at that position. Therefore, during recording and reproduction, the drum 20 is designed so that the spring 40 absorbs minute vibrations caused by the motor and the transmission mechanism.
The drum 20 can be set so that it does not come into direct contact with the reel 30, and separately, the drum 20 can be set so that it does not come into direct contact with the reel 30, in order to reliably transmit high rotational driving force during times other than recording and reproduction. Can be set. Therefore, good performance can be obtained in both cases.

In the above embodiment, a torsion spring was used as the spring 40, but the same effect can be obtained by changing the position of the support member 23, 33 and using a tension spring or temporary spring as shown in FIGS. 3(a) and 3(b). ,
Effects can be obtained.

Further, in the above embodiment, the support member 23.33 has the recess 22.
However, as shown in FIG. 3(C), a support member 23.33 is provided on one side of the stopper 25 and one end of the slit 35, and a spring 40 is attached to these. The same action and effect can be obtained even if the spring 40 is arranged between the 3 4 strike damper 25 and the slit 1-35. In the case of FIG. 3(C), the spring 40 is a tension spring, but as shown in FIG. 3(d), supporting members 23, 33 are provided on the other side of the stopper 25, the outer side 32B of the recess 32, and the spring 40 is a tension spring. Similar actions and effects can be obtained by using a compression spring as 40. Further, as shown in FIG. 3(e), similar actions and effects can be obtained even if a plate spring is used as the spring 40. In this case, the support member 23.3
3 is unnecessary.

In the above, the spring 40 is inserted between the stopper 25 and the slit 35.
However, instead of the spring 40, an elastic member such as a cushion material is arranged, and during recording and reproduction, it has elasticity and acts as an elastic material that absorbs minute vibrations, and when other than recording and reproduction, it has elasticity. It may be set so that it acts as an inelastic material having no .

[Effects of the Invention] As explained above, in the present invention, a spring is arranged between a drum and a reel which are rotatably arranged on a fixed shaft and are loosely fitted to each other. Therefore, the action of the spring is different during recording and reproduction and at times other than recording and reproduction, and the drum comes into contact with the reel indirectly or directly. Therefore, according to the present invention, it is possible to obtain good performance in both cases.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
), (b), and (C) are schematic diagrams illustrating the operating state of an embodiment of the present invention, and FIGS.
), (e) are schematic diagrams showing other embodiments of the present invention, No. 4
The figures show a conventional technique, with (a) being a front view and (b) being a sectional view. 20... Drum, 23... Supporting member, 25... Stopper, 30... Reel, 33... Supporting member, 35
...slit, 40...spring,

Claims (1)

[Scope of Claims] 1. A tape player having a reel for winding a magnetic tape, a motor serving as a driving source for the reel, and a transmission mechanism transmitting rotational driving force from the motor to the reel. The drum has a support member erected on the bottom surface of a ring-shaped recess that has been dug, and a stopper is protruded from the outer surface of the recess in parallel with the main shaft. It is attached to a fixed fixed shaft and rotatably supported on the chassis, and a support member is suspended from the upper surface of a ring-shaped recess dug in the lower surface of the support base, and A reel in which a part of the outer surface B of the reel is cut out parallel to the lower shaft to form a slit, the lower shaft is attached to the main shaft of the drum, and the upper shaft is attached to the fixed shaft. The stopper is disposed inside the slit, the support member of the drum is disposed inside the recess of the reel, and the support member of the reel is disposed within the recess of the drum. The reel drive device 2 for a tape player is characterized in that the spring is connected between the support members, and the ring portion of the spring is loosely fitted to the main shaft of the drum, and the spring is connected between the support members. 2. The reel driving device 3 for a tape player according to claim 1, wherein the reel driving device 3 is a torsion spring supported on the bottom surface and having both ends pressed against the support member; and the reel driving device 4 for a tape player according to claim 1, wherein the spring is a tension spring. 2. A reel drive device 5 for a tape player according to claim 1, wherein the spring is a plate spring, a reel for winding the magnetic tape, a motor serving as a drive source for the reel, and a rotational driving force transmitted from the motor to the reel. In a tape player having a transmission mechanism, the drum has a stopper protruding from the outer surface of a ring-shaped recess dug in the upper surface portion in parallel with the main shaft, and the main shaft is erected and fixed on the chassis. It is mounted on a fixed shaft and rotatably supported on the chassis, and a part of the outer surface of a ring-shaped recess bored in the lower surface of the support base is cut out parallel to the lower shaft to form a slit. In the reel, the lower shaft is attached to the main shaft of the drum, the upper shaft is attached to the fixed shaft, and the reel is rotatably fitted onto the drum, and the stopper is installed inside the slit. The reel drive device 6 for a tape player according to claim 5, wherein the reel drive device 6 is arranged between the stopper and the slit, and the spring is a tension spring. A reel drive device in a tape player according to claim 5, wherein the drive device 7 and the spring are leaf springs.A reel drive device in a tape player according to claim 5, wherein the spring is a compression spring.