KR19980041447A - Capstan Motor Fixing Structure and Method of Video Tape Recorder - Google Patents

Abstract

The present invention relates to a capstan motor of a video cassette tape recorder, and more particularly, to rotate a idle gear in a selected direction to drive a reel or winding and to effectively fix a capstan motor for feeding a tape in cooperation with a pinch roller. Regarding the improvement of the fixing structure to be able to, the cylindrical bearing housing 110 bent downward from the main base (1); An upper bearing 180 and a lower bearing 182 inserted into the bearing housing 110 at predetermined intervals; A locking step (112) formed at a lower end of the bearing housing (110) to limit the separation of the lower bearing (182) to the lower side; A stator 130 supported by the PC 120 fixed to the bottom of the main base 1; A capstan shaft 150 which is rotatably passed through the upper bearing 180 and the lower bearing 182 to be supported by the fixing ring 170 at the upper end of the capstan shaft 150 so as to be restricted from the lower portion; A rotor 140 fixed to a lower end of the capstan shaft 150 and relative to the stator 130; The pulley 160 is fixed to the bottom of the rotor 140 and connected to the reel driving device.

Description

Capstan Motor Fixing Structure and Method of Video Tape Recorder

The present invention relates to a capstan motor of a video cassette tape recorder, and more particularly, to rotate a idle gear in a selected direction to drive a reel or winding and to effectively fix a capstan motor for feeding a tape in cooperation with a pinch roller. The present invention relates to an improvement of a fixing structure and a method thereof.

In general, V-RA is a device for recording an image signal on a magnetic recording tape or reproducing a recorded signal. As shown in FIG. 1, the V-AL has a tape along a predetermined path on the main base 1 as shown in FIG. 1. And a drive system including a traveling system for moving and a supply reel 10, a winding reel 20, and the like, which support the tape cassette and drive the tape in a selected direction. At the periphery of the supply reel 10 and the take-up reel 20, brake devices 16, 18, 26, 28 are provided for limiting the rotation of the reel, if necessary. These brake devices are driven by the main plate 57 which is moved by the power transmitted sequentially from the loading cam motor 53 to the cam gear 54, the relay plate 55, and the relay gear 56.

The traveling system is provided with a head drum assembly 40 including a video head which rotates in contact with the tape from the tape cassette and records or reproduces a signal recorded on the tape. In addition, the traveling system is provided with a voice reproduction head 42 for reproducing an audio signal, and is provided with a capstan shaft 52 which rotates by the capstan motor 50 and cooperates with the pinch roller 44 to drive the tape.

And a reel driving device for driving any one of the reel selected from the supply reel 10 or the winding reel 20 receives power from the capstan motor 50 between the supply reel 10 and the take-up reel 20 It is installed.

The reel driving device is provided with a support shaft 60 rotatably installed at the lower end of the drive pulley 61 to receive power from the capstan motor 50, the upper end of the support shaft 60 at the end of the idle gear ( The rear end of the idle plate 31 on which 30 is rotatably supported is rotatably supported. In addition, an idle gear 30 is rotatably fixed to the tip of the idle plate 31 and rotates by the rotational force of the driving pulley 61 and engages with the selected reel.

The idle gear 30 makes a pivotal movement about the support shaft 60 according to the rotational direction of the capstan motor 50, and is engaged after being engaged to the selected reel of the supply or winding reel by the pivoting movement. The reel is driven to rotate. At this time, the driving direction of the reel is configured to rotate in the same direction as the rotation direction of the capstan motor 50.

As described above, the V-Cal is driven by the capstan shaft 52 which is rotated by the capstan motor 50 and the pinch roller 44 which cooperates with the capstan shaft.

According to FIG. 2, the capstan motor 50 fixes the bearing housing 60 to the main base 1, and forms bearing seats 62 and 64 on the upper and lower ends of the bearing housing 60, respectively. The bearing members 74 and 76 are press-fitted in the

The bearing housing 60 is fixed with a screw 67 that supports the stator 68. In addition, the lower end of the capstan shaft 52 is press-fitted to the central portion and the rotor 70 is arranged so that the stator 68 is arranged around the periphery. A pulley 72 for fixing the rotor 70 to the drive pulley 61 of the reel driving device is fixed to the lower portion of the rotor 70.

The capstan shaft 52 extends upwardly and passes through the bearing member 60 to provide a fixing ring 78 at the top thereof, and the rotor 70 is prevented from being separated downward by the fixing ring 78. To bear axial loads. The capstan shaft 52 rotatably penetrates the bearing member 60, and a pinch roller 44 is installed at a periphery thereof to interpose a tape T with the pinch roller to provide a feed force of the tape. do.

On the other hand, the bearing member 74, 76 is to smoothly support the rotation of the rotor 70 by using a metal bearing mainly containing a certain amount of oil.

However, the conventional capstan motor fixing structure has a problem in that the structure is complicated by the increase in the number of parts, and the assembly cost is high, and the production cost is increased and the productivity is lowered.

That is, the capstan motor fixing structure as described above is provided with a separate bearing housing 60, thereby fixing the bearing by using it. Therefore, the number of parts, such as the addition of a fixing screw, is increased, as well as a problem of difficulty in handling.

In addition, in the case described above, the process of assembling the temporary parts of the capstan motor and the process of fixing the capstan motor to the main base are separated, thereby increasing the number of assembling labors, thereby degrading assemblability and decreasing productivity.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to provide a capstan motor fixing structure and method of a video tape recorder that can improve the assembly and productivity by simplifying the structure.

1 is a plan view schematically showing a driving mechanism and a driving mechanism of a video cassette tape recorder

2 is a cross-sectional view showing a conventional capstan motor fixing structure

Figure 3 is a cross-sectional view showing the configuration of a preferred embodiment of the capstan motor fixing structure according to the present invention

Figure 4 is a cross-sectional view showing the configuration of another embodiment of the capstan motor fixing structure according to the present invention

5 is a perspective view showing the configuration of a bearing housing according to the embodiment of FIG.

Figure 6a is a cross-sectional view showing a state before coupling to the bearing housing and the method of fixing the bearing member according to the embodiment of Figure 4

Figure 6b is a cross-sectional view showing a state after the completion of the coupling showing the bearing housing and the bearing member according to the embodiment of Figure 4

Figure 7 is a cross-sectional view showing the configuration of another embodiment of the capstan motor fixing structure according to the present invention

8 is a cross-sectional view showing the configuration of another embodiment of the capstan motor fixing structure according to the present invention

Explanation of symbols on the main parts of the drawings

1: main base 100: capstan motor

102: protrusion 110: bearing housing

112: locking jaw 112a; Incision

114: bearing seat 120: PCB

130: stator 140: rotor

150: capstan shaft 160: pulley

170: retaining ring 180: upper bearing

182: lower bearing 184: spacer

190: bearing seat 190: jig base

192: concentric shaft 194: bending groove

The object of the present invention as described above is a cylindrical bearing housing bent downward from the main base; An upper bearing and a lower bearing inserted into the bearing housing at predetermined intervals; A catching jaw formed at a lower end of a bearing housing to limit the separation of the lower bearing to a lower portion of the bearing; A stator supported by the PCB fixed to the bottom of the main base; A capstan shaft which is rotatably passed through the upper bearing and the lower bearing to be supported so as to be restricted from the upper end of the capstan shaft by a fixing ring; A rotor fixed to a lower end of the capstan shaft and moving relative to the stator; It can be achieved by configuring a pulley fixed to the bottom of the rotor and connected to the reel driving device.

On the other hand, the object of the method of the present invention comprises the steps of bending the cylindrical bearing housing from the main base to the bottom; Forming a plurality of cutouts having a predetermined height in the axial direction at the lower periphery of the bearing housing; Sequentially inserting an upper bearing and a lower bearing from an upper portion of the bearing housing; Fixing the PCB supporting the stator to the bottom of the main base; The lower end of the capstan shaft is pressed into the rotor, and the capstan shaft can be achieved by the capstan motor fixing method of the video tape recorder consisting of assembling through the lower bearing and the upper bearing.

Hereinafter, a preferred embodiment of the capstan motor fixing structure of the video tape recorder according to the present invention will be described in detail with reference to the accompanying drawings.

3 shows a preferred embodiment of the capstan motor fixing structure of the video tape recorder according to the present invention. According to this, a capstan motor 100 having a rotor and a stator on the bottom of the main base 1 is assembled.

A bearing housing 110 is formed which is pressed downward from the main base 1. The upper end of the bearing housing 110 is integrally formed with a protruding jaw 102 protruding upward from a predetermined height above the upper surface of the main base 1.

The upper bearing 180 and the lower bearing 182 are press-fitted to the inner side of the bearing housing 110 at predetermined intervals. A spacer 184 is disposed between the upper bearing 180 and the lower bearing 182 to maintain a gap therebetween. On the other hand, at the lower end of the bearing housing 110, the engaging jaw 112 for limiting the departure to the lower portion of the lower bearing 182 is bent.

On the other hand, in the present invention, the PC (120) for supporting the stator 130 on the bottom surface of the main base 1 is fixed to the screw 116. In addition, in the present invention, the rotor 140 is fixed to the lower end of the capstan shaft 150 passing through the upper bearing 180 and the lower bearing 182. The rotor 140 surrounds the periphery of the stator 130 to achieve rotation in the selected direction by the current supplied to the stator 130.

A pulley 160 connected to the reel driving device is fixed to the bottom of the rotor 140.

A fixing ring 170 is provided at an upper end of the capstan shaft 150 penetrating the upper bearing 180 to prevent the rotor 140 from being detached and to support the load in the thrust direction.

The present invention having such a configuration sequentially presses the lower bearing 182, the spacer 184 and the upper bearing 180 into the bearing housing 110, and fixes the stator 130 to the main base (1); At the same time, the capstan shaft 150 fixed to the rotor 140 is inserted through the lower ball bearing 182, the spacer 184, and the upper bearing 180, and is fixed to the fixing ring 170 at the upper end thereof. Assembly of the capstan motor 100 is completed.

According to the present invention, when the upper bearing 180 and the lower bearing 182 are press-fitted, the lower bearing 182 and the spacer 184, and the upper bearing so as to match the upper part of the bearing housing 110 on a predetermined press-fit jig. When the 180 is disposed sequentially, and the upper bearing 180 is pressed by using a pressing means (not shown) at the upper portion thereof, the force is transmitted from the upper bearing 180 to the spacer 184, and the spacer 184 ) Presses the lower bearing 182 again into the bearing housing 110. In addition, the lower bearing 182 is caught by the locking jaw 112 so that the bearing is not lowered any more, thereby assembling the bearing.

Therefore, the present invention does not require a separate bearing housing, and thus does not require a separate component such as a screw for fixing the bearing housing, thereby reducing the number of parts and simplifying handling, as well as assembly and productivity. It will be possible to improve.

Figure 4 shows another embodiment of the capstan motor fixing structure of the video tape recorder according to the present invention, thereby forming a bearing seat 114 having an inner diameter larger than the inner diameter of the bearing housing at the top of the bearing housing 110, The lower end of the bearing housing 110 is inserted into the conventional lower bearing 182, the upper bearing seat 114 is shown a configuration for pressing the upper bearing 180 having an outer diameter larger than the lower bearing 182 is shown. . The spacer 184 is interposed between the upper bearing 180 and the lower bearing 182.

Accordingly, although the spacer 184 is shown in FIG. 4, it is provided to assemble the upper bearing 180 and the lower bearing 182 by a series of operations, which is not necessarily required in the present embodiment. That is, in assembling the bearing, after assembling the lower bearing 182 first, the assembly can be performed by press-assembling the upper bearing 180 to the bearing seat 114 and the upper bearing 180 and the lower bearing ( Since the position of 182 can be defined, the spacer 182 is not required.

5 to 6 also show a configuration of an apparatus for assembling the upper bearing 180 and the lower bearing 182 in one operation without using a spacer in the bearing housing 110 disclosed in the embodiment of FIG. 4. Shown. According to this, as shown in FIG. 5, the lower end of the bearing housing 110 is formed with an incision 112a which is cut in a predetermined length in the axial direction. The bearing housing 110 is assembled by a jig as shown in Figure 6a. The jig has a concentric shaft 192 protruding upward from the jig base 190, and a circular bending groove 194 having a semicircular cross section is formed around the concentric shaft 192. Thus, the lower bearing 182 is inserted onto the concentric shaft 192, and the bearing housing 110 having the upper bearing 180 assembled thereon is aligned with the bearing housing 110. 6B, the bearing housing 110 is pressed into the periphery of the lower bearing 182, and the lower end of the bearing housing 110 is bent groove 194 when the predetermined depth is reached. ) Is bent inward along the bending groove 194. At this time, the bending is very easy because the incision (112a) is formed. Accordingly, the lower end of the bearing housing 110 continues to be deformed along the shape of the bending groove 194, and the locking jaw 112 that contacts the bottom surface of the lower bearing 182 at a predetermined position substantially corresponds to the bending groove 194. Formed and the assembly of the bearing is completed.

In this state, when the bearing housing 110 is raised, the locking jaw 112 disengages the lower bearing 182 from the concentric shaft 192, thereby defining the position of the lower bearing 182 without the need for a spacer and assembling at the same time. It can be easily achieved.

In Fig. 7 another embodiment according to the invention is shown. According to this, the capstan motor 200 having the rotor and the stator on the bottom of the main base 1 is assembled.

The bearing housing 210 which is bent downward from the main base 1 is formed.

The upper bearing 280 and the lower bearing 282 having flanges 280a and 282a are press-fitted to the inside of the bearing housing 210 at predetermined intervals.

On the other hand, in the present invention, the PC (120) for supporting the stator 230 is fixed to the bottom surface of the main base (1) screw (116). In addition, the present invention, the rotor 240 is fixed to the lower end of the capstan shaft 250 passing through the upper bearing 280 and the lower bearing 282. The rotor 240 wraps around the periphery of the stator 230 to achieve rotation in the selected direction by the current supplied to the stator 230.

A pulley 260 connected to the reel driving device is fixed to the bottom of the rotor 240.

A fixing ring 270 is provided at an upper end of the capstan shaft 250 penetrating the upper bearing 280 to prevent the rotor 240 from being separated and to support a load in the trust direction.

According to this embodiment, the flanges 280a and 282a of the bearings are fixed by fixing the upper and lower bearings 280 and 282a having the flanges 280a and 282a to the upper and lower portions of the bearing housing 210. Since the fixed position is fixed to the upper and lower surfaces of the bearing housing 110, it does not require a spacer for maintaining the gap between the bearings, and at the same time, it is not necessary to form a locking jaw at the lower end of the bearing housing 110, thereby simplifying the configuration. Of course, the assembly can be greatly improved.

8 shows another embodiment of the capstan motor fixing structure of the video tape recorder according to the present invention. Herein, a structure capable of complementing the single contact in the embodiment disclosed in FIG. 7 is disclosed. That is, in the embodiment of Figure 7, each bearing is exposed to the outside, so the oil loss due to evaporation is fast to include a means for solving this. According to this, a capstan motor 300 having a rotor and a stator on the bottom of the main base 1 is assembled.

A bearing housing 310 is formed which is pressed downward from the main base 1. The upper end of the bearing housing 310 is integrally formed with a bearing seat 312 immersed below a predetermined height than the upper surface of the main base (1).

An upper bearing 380 and a lower bearing 382 having flanges 380a and 382a are pressed into the bearing seat 312 and the lower end of the bearing housing 310, respectively. The bearing seat 312 is filled with a certain amount of oil to continuously supply oil to the upper bearing 180.

On the other hand, in the present invention, the PCB 320 for supporting the stator 330 on the bottom surface of the main base 1 is fixed to the screw 316. In addition, the rotor 340 is fixed to the lower end of the capstan shaft 350 passing through the upper bearing 380 and the lower bearing 382. The rotor 340 wraps around the periphery of the stator 330 and rotates in a direction selected by a current supplied to the stator 330. In addition, the oil storage groove 342 is formed around the capstan shaft 350 of the rotor 340 to be immersed downward to accommodate the lower bearing 382. A certain amount of oil is filled in the reservoir groove 342 to continuously supply oil to the lower bearing 182.

In addition, the upper surface of the rotor 340 is rotatably coupled to the circumference of the bearing housing 310 to close the upper portion of the oil storage groove 342 to prevent the oil evaporation and leakage oil screw 395 It is fixed.

The bearing seat cover 384 is rotatably coupled to the periphery of the capstan shaft 350 and closes the upper portion of the bearing seat 312 at the upper end of the bearing seat 312. 396) is fixed.

A pulley 360 connected to the reel driving device is fixed to the bottom of the rotor 340.

In addition, a fixing ring 370 is provided at an upper end of the capstan shaft 350 penetrating the upper bearing 380 to prevent the rotor 340 from being separated and to support a load in the trust direction.

According to this embodiment, the bearing seat cover 384 and the oil reservoir 394 prevent oil evaporation of the upper bearing 380 and the lower bearing 382 to delay oil loss, as well as the main base 1 and The upper bearing 380 and the lower bearing containing oil are filled with oil by filling oil on the bearing seat and the oil reservoir 342 formed in the rotor 340 and impregnating the upper bearing 380 and the lower bearing 382. The characteristics of the 382 are maintained to be good to maintain the rotational performance of the capstan motor 300.

As described above, the capstan motor fixing structure of the video tape recorder according to the present invention does not require a separate bearing housing by integrally configuring the bearing housing on the main base, so that the bearing housing as well as the screw for fixing the bearing housing are required. By eliminating parts, the number of parts is reduced, so handling is easy. In particular, by assembling each part of the capstan motor with the assembly of the main base, it is possible to not only contribute to the reduction of manufacturing cost but also to increase the productivity. It is to have an effect.

Claims (13)

A cylindrical bearing housing 110 bent downward from the main base 1; An upper bearing 180 and a lower bearing 182 inserted into the bearing housing 110 at predetermined intervals; A locking step (112) formed at a lower end of the bearing housing (110) to limit the separation of the lower bearing (182) to the lower side; A stator 130 supported by the PC 120 fixed to the bottom of the main base 1; A capstan shaft 150 which is rotatably passed through the upper bearing 180 and the lower bearing 182 to be supported by the fixing ring 170 at the upper end of the capstan shaft 150 so as to be restricted from the lower portion; A rotor 140 fixed to a lower end of the capstan shaft 150 and relative to the stator 130; Capstan motor fixing structure of the video tape recorder, characterized in that consisting of a pulley 160 is fixed to the bottom of the rotor 140 is connected to the reel driving device. According to claim 1, Capstan motor fixing structure of the video tape recorder, characterized in that the upper end of the bearing housing (110) is integrally formed with a protruding jaw (102) protruding upward the predetermined height than the upper surface of the main base (1). The capstan motor fixing structure of claim 1, wherein a spacer (184) is provided between the upper bearing (180) and the lower bearing (182) to maintain a gap therebetween. According to claim 1, wherein the bearing seat 114 having an inner diameter larger than the inner diameter of the bearing housing is formed on the upper end of the bearing housing 110, the bearing seat 114 has an outer diameter larger than the lower bearing 182 Capstan motor fixing structure of the video tape recorder, characterized in that the upper bearing 180 is pressed. The method of claim 1, wherein the locking step 112 is formed in a plurality of cutouts (112a) having a predetermined height on the lower edge of the bearing housing 110 that is bent in a cylindrical shape, the cutout (112a) in a radial direction Capstan motor fixing structure of the video tape recorder, characterized in that formed by bending inward. Bending the cylindrical bearing housing 110 downward from the main base 1; Forming a plurality of cutouts (112a) having a predetermined height in the axial direction at the lower end of the bearing housing (110); Sequentially inserting an upper bearing (180) and a lower bearing (182) from an upper portion of the bearing housing (110); Fixing the PC 120 supporting the stator 130 to the bottom of the main base 1; Pressing the lower end of the capstan shaft 150 to the rotor 140, the capstan shaft 150 is a capstan motor fixing method comprising the step of assembling through the lower bearing 182 and the upper bearing 180. . The method of claim 6, wherein the locking step 112 is a jig base (190); A concentric shaft 192 protruding upward from the jig base 190; Capstan motor fixing method of a video tape recorder, characterized in that formed by a jig consisting of a circular bending groove (194) having a semi-circular cross-section around the concentric shaft (192). The bearing housing 110 of claim 7, wherein a lower bearing 182 is inserted onto the concentric shaft 192, and a bearing housing 110 having the upper bearing 180 assembled thereon is aligned with the bearing housing 110. By pressing by a predetermined pressing means, the lower end of the bearing housing 110 is deformed inward along the bent groove 194, and the deformed end thereof supports the bottom surface of the lower bearing 182 so that the lower bearing 182 may be deformed. Capstan motor fixing method of a video tape recorder characterized in that to perform the assembly and molding of the locking jaw at the same time. A cylindrical bearing housing 210 bent downward from the main base 1; An upper bearing 280 and a lower portion inserted into the upper and lower portions of the bearing housing 210 and having a flange 280a contacting the upper surface of the main base 1 and a flange 282a contacting the lower end of the bearing housing 210, respectively. Bearing 282; A stator 230 supported by the PC 220 that is fixed to the bottom of the main base 1; A capstan shaft 250 which is rotatably passed through the upper bearing 280 and the lower bearing 282 to be supported by the fixing ring 270 at the upper end of the capstan shaft 250 so as to be restricted from the lower portion; A rotor 240 fixed to the lower end of the capstan shaft 250 and moving relative to the stator 230; Capstan motor fixing structure of the video tape recorder, characterized in that consisting of a pulley 260 is fixed to the bottom of the rotor 240 is connected to the reel driving device. A bearing housing 310 which is bent downwardly from the main base 1 and integrally formed with a bearing sheet 312 immersed at a lower portion above the upper surface of the main base 1 at an upper end thereof; An upper bearing 380 and a lower portion inserted into the upper and lower portions of the bearing housing 310 and having a flange 380a contacting the upper surface of the main base 1 and a flange 382a contacting the lower end of the bearing housing 310, respectively. Bearing 382; A stator 330 supported by the PC 320 which is fixed to the bottom of the main base 1; A capstan shaft 350 which is rotatably passed through the upper bearing 380 and the lower bearing 382 to be supported by the fixing ring 370 at the upper end of the capstan shaft 350 so as to be restricted downward; A rotor (240) fixed to a lower end of the capstan shaft (350) and immersed in a lower portion of the capstan shaft (350) to receive a lower groove (342) for receiving the lower bearing (382); Capstan motor fixing structure of the video tape recorder, characterized in that consisting of a pulley 260 is fixed to the bottom of the rotor 340 is connected to the reel driving device. The video tape of claim 10, wherein the bearing seat 312 and the oil reservoir 342 are filled with a predetermined amount of oil to continuously supply oil to the upper bearing 380 and the lower bearing 382. Capstan motor fixing structure of recorder. 12. The video tape recorder of claim 11, wherein an oil storage groove cover 394 is further configured on an upper surface of the rotor 340 to prevent evaporation and leakage of oil closing the upper portion of the oil storage groove 342. Capstan motor fixing structure. 12. The video according to claim 11, wherein a bearing seat cover 384 is rotatably coupled to a circumference of the capstan shaft 350 and a top of the bearing seat 312 is fixed to the upper surface of the main base 1. Capstan motor fixing structure of tape recorder.