KR19980059030A - Pinch Roller Assembly of Tape Recorder - Google Patents

Abstract

The present invention relates to a pinch roller assembly of a tape recorder, and more particularly, to a pinch roller assembly of a tape recorder which has a structure capable of removing ball bearings and simplifying a structure while smoothly rotating and minimizing a fixed rate. In the pinch roller assembly of the tape recorder, one end of the pinch lever 200, the rotation guide ring 102 is fitted to the outer circumferential surface of the support shaft 101 fixed perpendicularly to the predetermined position, and the rubber layer 103a on the outer circumferential surface. Sleeve 103 is rotatably assembled to the support shaft 101, and is fitted to the upper end side of the support shaft 101, and has one end surface in contact with one end surface of the rotation guide ring 102. And an upper support bush 104 and a lower support bush 105 fitted to the lower end side of the support shaft 101 and having one end surface in contact with the other end surface of the rotation guide ring 102.

Description

Pinch Roller Assembly of Tape Recorder

The present invention relates to a pinch roller assembly of a tape recorder, and more particularly, to a pinch roller assembly of a tape recorder which has a structure capable of eliminating ball bearings and simplifying the structure while smoothly rotating and minimizing a fixed rate.

In general, a tape recorder records a video and audio signal on a magnetic recording tape or reproduces a recorded signal. FIG. 1 schematically illustrates a typical driving mechanism of such a tape recorder. Briefly explaining the driving mechanism of FIG. 1, the tape T drawn out from the supply reel 1 may be a modified post 2, a tension pole 3, a supply side guide post 4, a contact erasing head 5, and a supply side. It contacts the head drum 8 via the guide roller 6 and the supply side inclined foam 7. Subsequently, the tape T passed through the head drum 8 includes the angled side inclined pole 9, the sided guide roller 10, the audio control head 11, the capstan shaft 13, and the pinch roller 14. It is rolled up in the guilty reel (15).

The tape T having such a traveling path is positioned between the pinch roller 14 and the capstan shaft 13 before being wound on the gusset reel 15. At this time, the tape T is transported at a constant speed while maintaining an appropriate tension on the tape T by the rotation of the capstan shaft 13.

The pinch roller 14 adheres the tape T to the capstan shaft 13 so as to transfer the tape T to the pulley reel 15. The pinch roller 14 is arranged on one side of the pinch lever 15, and the pinch lever 16 pivots about the shaft 17 fixed to the main base and is fixed to the spring 18 fixed to the main base. It is connected.

In addition, the pin 19 fixed at one end moves along the cam groove formed in the cap gear (not shown), so that the pinch lever 16 is operatively rotated so that the pinch roller 14 and the capstan shaft 13 are in the selection mode. Depending on or in contact with each other.

FIG. 2 is a cross sectional view showing a conventional structure of the pinch roller assembly 14 in the traveling path of the tape T described above. Referring to this, the conventional pinch roller assembly 14 is composed of a support shaft 20, the sleeve 21, the holder 22, the cover 23 and the ball bearing 24.

The support shaft 20 is a round bar having a predetermined diameter and length, the lower end of which is fixed perpendicularly to a predetermined position of one end of the pinch lever 16, and the ball bearing 24, the holder 22 and the cover 23 are It is fitted to the support shaft 20.

The holder 22 has a ring shape having a predetermined diameter and width and is fitted to the lower end side of the support shaft 20, and the ball bearing 24 is an intermediate portion of the support shaft 20, that is, the holder 22. It is assembled on the upper side of.

The cover 23 is a cylindrical shape having a predetermined diameter and length, the upper surface is closed and the lower surface is opened to prevent the imaginary ball bearing 24 and the holder 22 from escaping from the support shaft 20. It is fitted to the upper end of the shaft (20).

The sleeve 21 has a cylindrical shape having a predetermined diameter and length, and a rubber layer 21a is formed on an outer circumferential surface thereof and is rotatably fitted to the outer circumferential surfaces of the ball bearing 24 and the holder 22 so as to be selectively assembled. The pinch lever 16 is configured to adjust the tension of the tape T while being in contact with or separated from the capstan shaft 13.

However, since the pinch roller assembly 14 of the conventional tape recorder by such a configuration allows the sleeve 21 to be rotated by using a relatively expensive ball bearing 24, the production cost is high and the structure is complicated to assemble productivity. Not only is this deterioration markedly deteriorated, especially when the sleeve 21 is pressed into the outer circumferential surfaces of the ball bearing 24 and the holder 22, a torsion occurs or a defect in which the ball bearing 24 is broken often occurs. There was a problem that the shock is very weak.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, the object of which is to eliminate the expensive ball bearings can be made smoothly the rotation operation of the sleeve can be made not only very low production cost but simple structure assembly productivity The remarkable improvement is, of course, to provide a pinch roller assembly of a tape recorder having a very good durability against impact and minimizing the defective rate for the pinch roller without press-fitting the sleeve.

1 is a plan view showing a general driving mechanism of a tape recorder.

Figure 2 is a cross-sectional view showing a coupling state of a conventional pinch roller assembly.

Figure 3 is an exploded cross-sectional view of the pinch roller assembly according to the present invention.

Figure 4 is a cross-sectional view showing a coupling state of the pinch roller assembly according to the present invention.

Fig. 5A is a fragmentary cross-sectional view showing one embodiment of the present invention.

Fig. 5B is a fragmentary cross-sectional view showing another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

100: pinch roller assembly 101: support shaft

102: rotation guide ring 103: sleeve

103a: rubber layer 104: upper support bush

105: lower support bush 106: cover

107: capstan shaft 200: pinch lever

T: Tape

The object of the present invention as described above, in the pinch roller assembly of the tape recorder, the rotary guide ring is fitted in a predetermined position on the outer circumferential surface of the support shaft that is vertically fixed to the predetermined position at one end of the pinch lever, and has a rubber layer on the outer circumferential surface A sleeve rotatably assembled to the shaft, an upper support bush assembled on the upper end side of the support shaft and having one end thereof in contact with one end surface of the rotary guide ring, and fitted at the lower end side of the support shaft and having one end face It can be achieved by the pinch roller assembly of the tape recorder, characterized in that it has a lower support bush in contact with the other end of the rotary guide ring.

Hereinafter, a preferred embodiment of the pinch roller assembly of the tape recorder according to the present invention will be described.

3 to 5B show the construction and the combined state of the pinch roller assembly of the tape recorder according to the present invention, and an embodiment of the main parts, respectively.

3 to 5B, the pinch roller assembly 100 of the tape recorder according to the present invention includes a support shaft 101, a rotation guide ring 102, a sleeve 103, an upper support bush 104, and a lower support portion. It consists of a seam 105 and a cover 16.

The support shaft 101 is a round bar having a predetermined diameter and length, and the lower end is vertically fixed at one end of the pinch lever 200 at a predetermined position.

The rotary guide ring 102 is made of a synthetic resin having a ring shape, the upper and lower surfaces are symmetrically formed with an inclined surface having a predetermined angle, or the upper and lower surfaces are symmetrically curved outwardly, and are fitted to an intermediate portion of the support shaft 101. Are assembled.

The upper support bush 103 is a synthetic resin having a reel shape, the inner peripheral surface of the lower end is formed as an inclined surface having a predetermined angle or curved outward.

The lower support bush 105 is formed up and down symmetrically with the upper support bush 103, the inner peripheral surface of the upper end is formed of an inclined surface having a predetermined angle equal to the inner peripheral surface of the lower end of the upper support bush 103 or curved outwardly Is formed.

The upper and lower support bushes 104 and 105 having the above structure are rotatably fitted to the support shaft 101.

The sleeve 103 is a cylindrical shape having a predetermined diameter and has a rubber layer 103a on its outer circumferential surface and is fitted to the outer circumferential surfaces of the upper and lower support bushes 104 and 105.

In the accompanying drawings, reference numeral 107 denotes a capstan shaft, 200 denotes a pinch lever, and T denotes a tape.

The pinch roller 100 of the tape recorder according to the present invention having the configuration as described above first supports the slitting portion 21 after assembling the rotary guide ring 102 in the middle of the support shaft 101. After fitting to the shaft 101, the upper support bush 104 and the lower support bush 105 are fitted to the outer circumferential surface of the support shaft 101 to fix the sleeve 21. At this time, the inner peripheral surface of the lower end of the upper support bush 104 is rotatably fitted to the support shaft 101 to be in contact with the upper surface of the rotary guide ring 102, the inner peripheral surface of the upper end of the lower support bush 105 The support guide is rotatably fitted to the support shaft 102 to be in contact with the lower surface of the rotary guide ring 102.

In the assembly state as described above, if the upper and lower surfaces of the rotary guide ring 102 is formed as a plane inclined surface of the upper and lower support bushings 104, 105, the lower inner peripheral surface and the upper inner peripheral surface of the inclined curved outwardly The upper and lower support bushes 104 and 105 of the upper and lower support bushes when the upper and lower inclined surfaces of the rotating guide ring 102 have outwardly curved inclined surfaces. The lower and upper inner peripheral surfaces are assembled to have a planar inclined surface, thereby minimizing the contact area with the rotary guide ring 102.

In the above state, if the pinch roller assembly 100 is in close contact with the capstan shaft 107 and the tape T between the upper and lower surfaces of the rotary guide ring 102 and the upper and lower support bushes 104 and 105. Since the friction area is hardly generated because of a very small contact area, the sleeve 103 can smoothly rotate by the driving force of the capstan shaft 107 while adjusting the tension of the tape T.

As described above, the pinch roller assembly 100 of the tape recorder according to the present invention fits and supports the rotary guide ring 102 having an inclined surface that is curved upwardly or outwardly with a top and bottom symmetry on the support shaft 101. And the upper and lower support bushes 104 and 105 rotatably fitted to the support shaft 101, respectively, having lower and upper inner circumferential surfaces opposite to upper and lower surfaces of the rotary guide ring 102, respectively. The upper and lower surfaces of the ring 102 are in contact with the capstan shaft 107 even when there is no separate ball bearing by allowing the sleeve 103 to be fixed by the upper and lower support bushes 104 and 105. In communication with the sleeve 103 is smoothly rotated running to adjust the tension of the tape (T) wound on the winding reel, manufacturing cost is reduced, as well as the structure is simplified, the assembly productivity Hi it improved and rotatably to a sleeve 103, without the press-process assembly hameuroseo minimizing the defect rate of the pinch roller assembly 100, and will have the effect to strengthen the resistance to shock.

Claims (10)

In the pinch roller assembly of the tape recorder, one end of the pinch lever 200, the rotation guide ring 102 is fitted to the outer circumferential surface of the support shaft 101 fixed perpendicularly to the predetermined position, and the rubber layer 103a on the outer circumferential surface. Sleeve 103 is rotatably assembled to the support shaft 101, and is fitted to the upper end side of the support shaft 101, and has one end surface in contact with one end surface of the rotation guide ring 102. And an upper support bush 104 and a lower support bush 105 fitted to the lower end side of the support shaft 101 and having one end contacting the other end surface of the rotation guide ring 102. Pinch roller assembly of tape recorder. The pinch roller assembly of claim 1, wherein the upper and lower support bushes (104) are rotatably assembled to the support shaft (101). The pinch roller assembly of claim 1, wherein the upper and lower surfaces of the rotation guide ring (102) are formed in a planar inclined surface having a predetermined angle to be symmetrically up and down. The pinch roller assembly of claim 1, wherein the upper and lower surfaces of the rotation guide ring are formed in an outwardly curved inclined surface having a predetermined angle to be symmetrically up and down. The pinch roller assembly of claim 1, wherein an inner circumferential surface of the lower end of the upper support bush (104) is formed as a planar inclined surface having a predetermined angle. The pinch roller assembly of claim 1, wherein an inner circumferential surface of the upper end of the lower support bush (105) is formed as a plane inclined surface having a predetermined angle. The pinch roller assembly of claim 1, wherein the inner peripheral surface of the upper end portion of the upper support bush (104) is formed as an outwardly curved inclined surface having a predetermined angle. The pinch roller assembly of claim 1, wherein an inner circumferential surface of the upper end of the lower support bush (105) is formed as an outwardly curved inclined surface having a predetermined angle. The lower and upper ends of the upper and lower support bushes 104 and 105 when the upper and lower surfaces of the rotary guide ring 102 are inclined planes. A pinch roller assembly of a tape recorder, characterized in that the inner circumferential surface thereof has an outwardly curved inclined surface. The upper and lower support bushes (104) and (105) of any one of claims 1, 4, 5 and 6, when the upper and lower surfaces of the rotary guide ring (102) are inclined outwardly curved. A pinch roller assembly of a tape recorder, wherein the lower and upper inner circumferential surfaces have a planar inclined surface outward.