JPH0753155Y2 - Pinch roller support mechanism for tape drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pinch roller support mechanism for a tape drive device in which a pinch roller can be inserted into and removed from a pinch roller arm on a side substantially orthogonal to a capstan contact side. Regarding

(Prior Art) Generally, a pinch roller support mechanism of a tape drive device rotatably supports a pinch roller on a pinch roller arm rotatably provided on a substrate of the tape drive device to rotate the pinch roller arm. The pinch roller is brought into contact with and separated from the capstan.

Further, the pinch roller arm is made of synthetic resin, the pinch roller shaft is projected to the center of the upper and lower ends of the pinch roller arm, and the pinch roller arm is provided in upper and lower pieces of the pinch roller arm from the capstan contact side in the shaft support grooves. A configuration in which the pinch roller is inserted and removed has also been considered (JP-A-63-168863 and JP-A-60-107758).

(Problems to be solved by the invention) However, in the conventional pinch roller support mechanism of this type,
A shaft hole for fitting the pinch roller shaft is provided in the upper and lower pieces forming the turning end of the pinch roller arm, and a cut groove continuous with the shaft hole is provided on the side of the upper and lower pieces facing the capstan. The pinch roller is attached to the capstan contact side from the capstan contact side through the cut groove.
Therefore, for example, when trying to load the tape cassette at a stage where the pinch roller is not sufficiently separated from the capstan, the tape cassette hits the upper end of the pinch roller, and the pinch roller comes off the pinch roller arm. There was a problem.

An object of the present invention is to provide a tape drive device which is easy to attach to a pinch roller arm, but which does not easily come off from the pinch roller arm even when the tape cassette hits the pinch roller when the tape cassette is loaded. It is to provide a pinch roller support mechanism.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention rotatably supports a pinch roller on a synthetic resin pinch roller arm rotatably provided on a substrate of a tape drive device. In a pinch roller support mechanism of a tape drive device in which the pinch roller arm is brought into contact with and separated from a capstan by rotation of the pinch roller arm, the pinch roller has a pinch roller shaft protruding toward the upper and lower ends, and the pinch roller arm is provided. In the upper and lower pieces of the shaft support groove, the upper and lower pinch roller shafts are respectively inserted and removed in the direction orthogonal to the pinch roller shaft on the side substantially orthogonal to the capstan contact side with reference to the pinch roller shaft. It is characterized by being provided.

(Operation) The upper and lower pinch roller shafts of the pinch roller with respect to the shaft support grooves of the upper and lower pieces of the pinch roller arm are connected to the pinch roller shaft on the side substantially orthogonal to the capstan contact side with reference to the pinch roller shaft. It can be inserted and removed only in the orthogonal direction, and even if the tape cassette hits the pinch roller, the pinch roller does not come off from the pinch roller arm.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 1 is an exploded perspective view of a pinch roller supporting mechanism of a tape drive device of the present invention, and FIG. 2 is an assembly perspective view of the same. In both figures, 1 is a substrate of the tape drive device, and a capstan 2 is on its upper surface.
The support shaft 3 and the locking piece 4 are respectively arranged. The capstan 2 is rotatably supported on the substrate 1 via a bearing metal 5. The support shaft 3 has a pinch roller arm 6
Is rotatably supported. The pinch roller arm 6 is made of synthetic resin and has a fitting hole 8 that penetrates in the up-down direction in the substantial center of a block-shaped main body 7 that is substantially rectangular in a plan view, and has a predetermined interval at one end in the longitudinal direction of the main body 7. And upper and lower pieces 9 and 10 facing each other in the vertical direction, and an engaging wall 11 on one side in the width direction of the main body 7. A pinch roller 12 is rotatably supported between the upper and lower pieces 9 and 10. The pinch roller arm 6 is rotatably mounted on the upper surface of the substrate 1 by fitting the fitting hole 8 into the support shaft 3. In this mounted state, the hook portion 4a at the upper end of the locking piece 4 comes into contact with the upper surface of the engagement wall 11 so that the pinch roller arm 6 cannot be disengaged from the support shaft 3 in a spilled manner. The pinch roller 12 is brought into contact with and separated from the capstan 2 by the rotation of the pinch roller arm 6.

The pinch roller 12 is made of rubber, and the pinch roller shafts 13 and 14 project from the upper and lower ends thereof. These pinch roller shaft 1
3, 14 are rotatably fitted in shaft holes 15, 16 formed in the upper and lower pieces 9, 10 of the pinch roller arm 6. Upper and lower pieces 9,10
Shaft supporting grooves 17 and 18 are provided on the opposing surfaces of the. These shaft support grooves 17 and 18 have the same structure, and the upper and lower pinch roller shafts 13 and 14 are respectively connected to the pinch roller shafts 13 and 14.
On the side substantially orthogonal to the side in contact with the capstan 2 with reference to, the pinch roller shafts 13 and 14 are inserted and removed in the direction orthogonal thereto. That is, the shaft support groove 1
As shown in FIG. 3, the reference numerals 7, 18 are formed from the tip surfaces 9a, 10a of the upper and lower pieces 9, 10 toward the shaft holes 15, 16 side, and their bottom walls 17a, 18a are formed by the upper and lower pieces 9, 10. Shaft holes 15 and 16 from the tip surfaces 9a and 10a of 10
It gradually inwardly inclines toward. Then, the upper and lower pinch roller shafts 13 and 14 of the pinch roller 12 are inserted into the shaft support grooves 17 and 18 of the upper and lower pieces 9 and 10 of the pinch roller arm 6 as shown by arrows in FIG. ,
With 14 as a reference, by pushing and inserting in a direction orthogonal to these pinch roller shafts 13 and 14 from a side substantially orthogonal to the side in contact with the capstan 2, the tip surfaces of these pinch roller shafts 13 and 14 become By slidingly contacting the bottom walls 17a and 18a of the support grooves 17 and 18, the upper and lower pieces 9 and 10 are pushed apart against each other against elasticity. Then, when the tip surfaces of the upper and lower pinch roller shafts 13 and 14 pass through the inner ends of the bottom walls 17a and 18a and fit into the shaft holes 15 and 16, the upper and lower pieces 9 and 10 elastically return to the third position.
As shown in the figure, the pinch roller 12 is rotatably supported between the upper and lower pieces 9 and 10. In the supporting state of FIG. 3,
The pinch roller shafts 13 and 14 can be disengaged from the shaft support grooves 17 and 18 only in the arrow directions, and cannot be disengaged in the other directions. Therefore, even when the tape cassette hits the pinch roller 12 when the tape cassette is loaded, the pinch roller 12 cannot be dislodged from between the upper and lower pieces 9 and 10 of the pinch roller arm 6 unnecessarily.

Moreover, the inner ends of the bottom walls 17a and 18a of the shaft supporting grooves 17 and 18 are formed in the shaft holes 15 and 1, respectively.
Since a step is formed between the pinch roller shafts 6 and 6 to prevent the pinch roller shafts 13 and 14 from coming off, the pinch roller 12 cannot be removed unless the upper and lower pieces 9 and 10 are forcibly expanded. The support structure itself can be made rigid while achieving simplification.

(Effect of the Invention) As described above, the present invention rotatably supports the pinch roller on the synthetic resin pinch roller arm rotatably provided on the substrate of the tape drive device, and by the rotation of the pinch roller arm. In a pinch roller support mechanism of a tape drive device in which the pinch roller is brought into contact with and separated from a capstan, the pinch roller has a pinch roller shaft protruding at the center of the upper and lower ends, and upper and lower pieces of the pinch roller arm respectively have A shaft support groove for inserting and removing the upper and lower pinch roller shafts in a direction substantially orthogonal to the capstan contact side with respect to the pinch roller shafts is provided. It is a thing.

Therefore, the upper and lower pinch roller shafts of the pinch roller are orthogonal to the pinch roller shaft on the side substantially orthogonal to the capstan contact side with respect to the pinch roller shaft with respect to the shaft support grooves of the upper and lower pieces of the pinch roller arm. The pinch roller can be inserted and removed only in the direction in which the pinch roller is attached, and even if the tape cassette hits the pinch roller, the pinch roller does not come loose from the pinch roller arm.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is an exploded perspective view of a pinch roller supporting mechanism of a tape drive device of the present invention, and FIG.
The drawing is a perspective view of the assembly, and FIG. 3 is a sectional view taken along the line III-III in FIG. 1 ... Substrate, 2 ... Capstan, 6 ... Pinch roller arm, 9 ... Top piece, 10 ... Bottom piece, 12 ... Pinch roller, 13,14 ... Pinch roller shaft, 17,18 ... Shaft support groove.

Claims (1)

[Scope of utility model registration request] 1. A pinch roller (12) is rotatably supported on a synthetic resin pinch roller arm (6) rotatably provided on a substrate (1) of a tape drive unit, and the pinch roller arm (12) is rotatably supported. In a pinch roller support mechanism of a tape drive device, wherein the pinch roller is brought into contact with and separated from a capstan (2) by rotation, pinch roller shafts (13, 14) are respectively projected at upper and lower ends of the pinch roller. The pair of upper and lower pieces (9, 10) forming the turning end of the pinch roller arm are provided with shaft holes (15, 16) for fitting and holding the pinch roller shafts, respectively. A shaft support groove (17, 18) for guiding the pinch roller shaft to each shaft hole while flexing in the vertical direction is provided in a direction substantially orthogonal to the direction of contact and separation of the pinch roller with the capstan. Characterizing A pinch roller support mechanism-loop drive.