JPS6144281Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reel stand driving device for a tape recorder.

Conventionally, in the reel stand drive of a tape recorder, a drive wheel to which rotational driving force from a motor is transmitted is rotatably provided on an operating lever, one end of which is rotatably supported on a support shaft on the chassis. By rotationally displacing the actuating lever in the left and right direction during a rewinding operation, the driving wheels are brought into contact with the left and right reel stands directly or indirectly, and the respective reel stands are selectively driven to rotate. .

However, in such conventional devices, the operating lever on which the drive wheel is mounted is supported with respect to the chassis by a so-called one-point support in which one end of the operating lever is rotatably supported around a support shaft. When the operating lever is rotated in the left-right direction during fast-forwarding and rewinding operations, the operating lever tends to wobble vertically during its rotation, and the contact between the drive wheel and the left and right reel stands is smooth in the predetermined position. It was not done. As a result, the transmission of rotational driving force between the drive wheels and the left and right reel stands becomes unstable at the initial stage of contact, and especially when the gears are meshing together, the meshing is not carried out smoothly, resulting in so-called gear noise. It was also a cause of.

The present invention has been developed in view of these points, and one embodiment thereof will be described below with reference to the drawings.

In the figure, 1, 2, 3, and 4 are push buttons for stop, rewind, fast forward, and play, respectively, from the left side, and 5 is an arrow A-
A recording/reproducing head 9 is mounted on the head substrate 5, which is slidably arranged in the direction A'. Pinch roller 10 slid in direction A
is brought to the forward sliding position where the tape is brought into contact with the capstan 11 and the recording/reproducing head 9 contacts the tape of a cassette (not shown). Reference numerals 12 and 13 indicate take-up and supply reel stands 14 and 15 that are rotatably supported on the chassis 6 and have gear portions 12a and 13a formed on their peripheral surfaces for transmitting rotational driving force, respectively. An intermediate gear 17 rotatably supported on the chassis 6 by a shaft 16 is always meshed with the gear portion 12a of the reel stand 12. Reference numeral 18 denotes an operating lever whose one end side is rotatably supported on a support shaft 19 on the back side of the chassis 6;
A through hole having a guide hole edge 20a formed between 7 and the supply reel stand 13, 21 is rotatably located on the back surface of the central portion of the operating lever 18 facing the upper surface side of the chassis 6 from the through hole 20. A drive gear 21a inserted through the through hole 20 and a belt pulley 21b are rotationally connected to each other by friction, and the belt pulley 21b is connected to a motor pulley 23a of a motor 23. A rubber belt 26 is stretched between the flywheel 24 and a pseudo flywheel 25 for anti-rolling as shown in the figure, so that the rotational driving force from the motor 23 is transmitted. Therefore,
A rotation force to the right (counterclockwise) is always applied to the operating lever 18 by a rubber belt 26. Further, the drive gear 2 of the operating lever 18
A guide roller 27 having a guide groove 27a formed around it is screwed onto the tip end of the other end side holding the roller 1a.
The guide roller 27 is provided with a guide groove 27 in order to guide the rotation of the actuating lever 18 in the left-right direction with its position restricted in the vertical direction.
a is a guide hole edge 20 of the through hole 20 formed in an arc shape with the support shaft 19 of the operating lever 18 as the center;
a (see Figure 3). And 2
9 has shafts 30, 30 and a long hole 3 on the back side of the chassis 6.
1 and 31, which is slidably arranged in the direction of arrow A-A';
9 is always slidably biased in the direction of arrow A' by a spring 32, and the fast-forwarding push button 3 is fitted into one end thereof. Further, when the fast-forwarding lever 29 is not operated, the guide roller 27 is attached to the fast-forwarding lever 29.
A regulating protrusion 29a is formed which brings the actuating lever 18 into a neutral position where the drive gear 21a of the gear pulley 21 is separated from the supply reel stand 13 and the intermediate gear 17. A recess 29b is formed to allow the operating lever 18 to rotate to the right and to engage the drive gear 21a of the gear pulley 21 with the intermediate gear 17. 33 is the shaft 3 on the back side of the chassis 6.
4, 34 and elongated holes 35, 35, the rewinding lever 33 is always slidably biased in the direction of arrow A' by a spring 36, and one end thereof is the rewind push button 2.
is fitted. In addition, the rewinding lever 3
3 is formed with a first regulating piece portion 33a that comes into contact with the bent piece 18a of the actuating lever 18 when not operated and regulates the actuating lever 18 together with the fast-forwarding lever 29 to a neutral position. A second regulating piece portion 33b is formed that comes into contact with the bent piece 18a of the operating lever 18 when the lever 29 is operated, and limits the amount of horizontal rotation thereof to the right.
When the rewinding lever 33 is operated, the second regulating piece 33b and the bent piece 18a come into contact with each other, causing the actuating lever 18 to be rotated to the left (clockwise) against the rubber belt 26. The drive gear 21a of the pulley 21 is connected to the gear portion 13a of the supply reel stand 13.
mesh with. In addition, 37 is a lever to prevent mistaken recording, 3
8 is a spring body for pressing the cassette.

The device of the present invention is configured as described above,
The operation will be explained below.

(1) Stopped state First, in the stopped state, as shown in FIG. Due to the contact relationship with the piece 18a, the drive gear 21a of the gear pulley 21 is connected to the gear portion 13a of the supply reel stand 13.
It is also in a neutral position completely separated from the intermediate gear 17.

Therefore, during a regeneration operation in which the regeneration push button 4 is pressed from such a stopped state, the operating lever 18 is rotationally displaced due to an external impact, etc., and the drive gear 21a of the gear pulley 21 is mistakenly connected to the gear of the supply reel stand 13. There is no possibility that the tape will come into contact with the portion 13a or the intermediate gear 17 and produce abnormal noise or adversely affect tape running.

(2) Fast-forward state Next, from such a stopped state, when the fast-forward push button 3 is pressed in the direction of arrow A and the fast-forward lever 29 is operated to perform a predetermined fast-forward operation, the regulating protrusion 29a of the fast-forward lever 29 and the guide The guide roller 27 comes out of contact with the roller 27 and moves into the recess 29b.
and the rubber belt 26 rotates the operating lever 18 to the right (counterclockwise) (i.e.,
(rotation to the operating position) is permitted. Therefore, the drive gear 21a of the gear pulley 21 meshes with the intermediate gear 17 to rotationally drive the take-up reel stand 12 (see FIG. 2). At this time, the bent piece 18a of the operating lever 18 comes into contact with the second regulating piece 33b of the rewinding lever 33, and the operating lever 1
8 is regulated, and the amount of engagement between the drive gear 21a of the gear pulley 21 and the intermediate gear 17 is maintained at an appropriate value. During such a fast-forward operation, the rightward rotation of the operating lever 18 is guided by the support shaft 19 and the guide hole edge 2 that sandwich the drive gear 21a inserted into the through hole 20 of the chassis 6.
Since the position is regulated in the vertical direction by the guide roller 27 fitted to 0a,
The operating lever 18 wobbles in the vertical direction during its rotation, causing the drive gear 21a and the intermediate gear 1 to
Unless the mesh with 7 is made smooth, the so-called inconvenience will not occur.

Also, from the stopped state, press the rewind push button 2 in the direction of arrow A to move the rewind lever 33 to the second position.
Even during a rewinding operation in which the actuating lever 18 is rotationally displaced to the left due to contact between the regulating piece 33b and the bending piece 18a, the actuating lever 18 moves up and down during its rotation, similar to the fast forwarding operation. The drive gear 21a of the gear pulley 21 and the gear portion 13a of the supply reel stand 13 can be reliably engaged without wobbling in the direction.

In this embodiment, a case has been described in which a guide roller is combined with the edge of the guide hole. However, the guide roller is not limited to the guide roller. Any material may be used as long as it serves as a guide member that allows the movement to be performed in a regulated manner.

As described above, the device of the present invention includes a take-up reel stand and a supply reel stand that are rotatably provided on the chassis and each have a gear portion, and a take-up reel stand and a supply reel stand that are rotatably provided on the chassis and mesh with the gear portion of the take-up reel stand. an intermediate gear; a through hole having a guide hole edge formed between at least the intermediate gear and the supply reel stand; An actuating lever is provided with belt pulleys installed above and below, and one end of the actuating lever that sandwiches the driving gear is rotatably mounted on a chassis by a spindle, and the driving gear is held in place. A guide member is provided at the tip of the other end so as to fit with the guide hole edge of the through hole, and the actuating lever is regulated to a neutral position when not operated, so that the drive gear is not moved relative to the intermediate gear. It consists of a fast-forwarding lever that is set in an engaged state, and a means for regulating the amount of horizontal rotation of the actuation lever that rotates from a neutral position to an operating position when the fast-forwarding lever is operated, and when the fast-forwarding lever is operated, the actuation lever is rotated. of,
The support shaft that holds the drive gear inserted into the through hole of the chassis and the guide member fitted to the edge of the guide hole restrict the position up and down and rotate it to the operating position, so that the drive gear meshes with the intermediate gear. Since the actuating lever is configured to rotate vertically relative to the chassis without wobbling, the driving gear and the intermediate gear can be smoothly engaged at a predetermined position, resulting in stable rotational drive. It can transmit power.

Furthermore, according to the present invention, the amount of horizontal rotation of the actuating lever, which rotates from the neutral position to the operating position when the fast-forwarding lever is operated, is also regulated, so that the amount of engagement between the drive gear and the intermediate gear is always maintained. It can be maintained at an appropriate value, and its effect is of extremely high practical value.

[Brief explanation of the drawing]

The figures show an embodiment of the device according to the present invention, FIG. 1 is a schematic plan view showing the stopped state, FIG. 2 is a schematic plan view showing the fast-forwarding state, and FIG. 3 shows the guide roller and guide hole edge. FIG. 6... Chassis, 12, 13... Take-up and supply reel stand, 12a, 13a... Gear part, 17...
Intermediate gear, 18... Operating lever, 19... Support shaft,
20... Through hole, 20a... Guide hole edge, 21...
Gear pulley, 21a... Drive gear, 27... Guide roller as a guide member, 29... Rapid feed lever.

Claims (1)

[Claims for Utility Model Registration] A take-up reel stand and a supply reel stand that are rotatably provided on a chassis and each have a gear portion, and a take-up reel stand and a supply reel stand that are rotatably provided on the chassis and mesh with the gear portion of the take-up reel stand. an intermediate gear; a through hole having a guide hole edge formed between at least the intermediate gear of the chassis and the supply reel stand; and a drive gear inserted through the through hole and a rotational driving force from the motor that is transmitted to the belt. an actuating lever with belt pulleys installed above and below, and one end of the actuating lever that sandwiches the driving gear is rotatably mounted on a chassis by a spindle, and when the driving gear is held in place, A guide member provided at the tip of the other end so as to be fitted with the guide hole edge of the through hole, and a non-operating part regulating the actuating lever to a neutral position and positioning the drive gear relative to the intermediate gear. It consists of a rapid-forwarding lever that is set to a non-meshing state, and a means for regulating the amount of horizontal rotation of an operating lever that rotates from a neutral position to an operating position when the rapid-forwarding lever is operated, and when the rapid-forwarding lever is operated, the operating lever is operated. The lever is vertically regulated by a support shaft that holds the drive gear inserted in the through hole of the chassis and a guide member fitted to the edge of the guide hole, and rotated to the operating position, and the drive gear is changed to the intermediate gear. A reel stand drive device for a tape recorder, characterized in that the reel stand drive device is configured to mesh with each other.