KR19980059039A - Head Base Fastening Structure of Head Drum Assembly - Google Patents

Abstract

The present invention relates to a head base fastening structure of the head drum assembly, and in particular, the head base is securely fastened to a predetermined position of the upper drum while arranging the head in the correct position only by the press-fitting of the head base without a separate head positioning process. The head base fastening structure of the head drum assembly to have a structure that can be, the head base fastening structure of the head drum assembly, the bottom surface of the upper drum 100 machined surface 102 is formed with a predetermined size at a predetermined position ) And a plurality of pairs of fixing protrusions 103a, 103b (104a, 104b) which are formed at predetermined positions along both side ends of the processing surface 102 at predetermined positions at both end portions of the processing surface 102, respectively, It has a fixed projection 105 integrally formed at a predetermined position at the rear end of the processing surface 102, the head base 106 between the plurality of pair of fixing projections (103a, 103b) 104a, 104b When fitted to each of both side ends and the rear ends flush with the fixing protrusion 105 is characterized in that the fastening portion to be in close contact with the processing surface (102).

Description

Head Base Fastening Structure of Head Drum Assembly

The present invention relates to a head base fastening structure of the head drum assembly, and in particular, the head base is securely fastened to a predetermined position of the upper drum while arranging the head in the correct position only by the press-fitting of the head base without a separate head positioning process. The headbase fastening structure of the head drum assembly to have a structure capable of.

In general, V-Cal records signals on a main base, a traveling system installed on the main base to take out a tape from a cassette and moves along a predetermined path, and records a signal on a moving tape disposed at an appropriate place of the traveling system. And a headdrum assembly that includes a video head for reproducing a signal from the apparatus.

The head drum assembly is equipped with a video head and has an upper drum that rotates at high speed, so that the head drum assembly is very sensitive to vibrations and vibrations during rotation, so that a bearing means is provided between the rotating body and the non-rotating body to realize a quiet rotation. .

For reference, referring to an example of a head drum assembly having a conventional headbase fastening structure with reference to FIG. 1 (the actual head drum assembly is inclined, but the head drum assembly is shown in a vertical state for convenience). A lower drum 1 fixed to the main base, a main shaft 2 assembled through the lower drum 1, and a lower drum 1 fixed to the upper end of the main shaft 2 together with the main shaft 2; It consists of an upper drum (3) that rotates relative to the electric motor (4) for generating a rotational power supplied to the main shaft (2) and the upper drum (3). On the bottom of the upper drum 3, for example, two head bases 5 and 6 are attached to the bottom of the upper drum 3 so as to be height-adjustable at intervals of 180 DEG by screws 7 or the like. 6) has video heads 8, 9 for magnetically recording or reproducing a video signal at its radially outer end. In addition, since the rotary transformer 10 is installed between the upper drum 3 and the lower drum 1 so as to transmit a signal in a contactless manner, an image signal supplied to or output from the video head is generated. You can give and receive without.

FIG. 2 is a partially exploded view specifically showing a conventional headbase fastening structure for fastening the head bases 5 and 6 to the bottom of the upper drum 3, wherein the conventional headbase fastening structure is the upper drum 3; At the lower end portion of the head), the head arrangement groove 12 is cut out to have a predetermined size, and a screw hole 11 is formed at a predetermined position on the bottom surface of the upper drum 3, and at the front end of the head base 5, The head 8 is attached, and the screw hole 5a is penetrated in the center part.

The head base 5 is formed on the bottom surface of the upper drum 3 having the structure as described above, and one surface portion of the head base 5 is positioned at the head placement groove 12 so that the head 8 is positioned at the head placement groove 12. After placing it in close contact with the bottom part, the screw 7 is passed through the screw hole 5a of the head base 5 so that the upper drum 3 is loosely screwed into the screw hole 11, and then the head 8 is correct. Adjust the headbase 5 to be placed in position.

When the head positioning operation as described above is completed, the head bass 5 is fastened to the bottom of the upper drum 3 by fully tightening the screw 7.

However, in the head base fastening structure of the conventional head drum assembly as described above, after the head base 5 is disposed on the bottom of the upper drum 3, the screw 7 is loosely fastened and then the head position is adjusted. Since the head base 5 can be fastened to the bottom of the upper drum 3 by fully tightening the screw 7, the productivity of assembly is not only remarkably degraded, but the defective rate must be adjusted individually for each head. There was also a problem that is high.

Accordingly, the present invention has been made to solve the above problems, the object is that when the head base is fastened to the upper drum of the head drum assembly, the head base is once fastened without screwing after the positioning process for each head The head base fastening structure of the head drum assembly can reduce the manufacturing cost by significantly improving assembly productivity as well as eliminating the number of parts by ensuring that the head is positioned at the correct position by the press-fit operation. In providing.

1 is a longitudinal cross-sectional view showing a structure of a typical head drum assembly.

Figure 2 is a partially exploded perspective view showing a structure for fastening the head base on the lower surface of the prior art.

Figure 3 is a partially exploded perspective view showing a structure for fastening the head base to the lower surface of the upper drum according to the present invention.

Figure 4a is a plan view showing a headbase fastening state according to the present invention.

4B is a cross-sectional view taken along the line AA ′ of FIG. 3.

* Explanation of symbols for main parts of the drawings

100: upper drum 101: head arrangement groove

102: machining surface 103a, 103b, 104a, 104b: fixed protrusion pair

105: fixing protrusion 106: head base

107: head D: spacing of fixed protrusion pair

d: width of head base

SUMMARY OF THE INVENTION An object of the present invention is a headbase fastening structure of a head drum assembly, comprising: a processing surface having a predetermined size at a predetermined bottom surface of an upper drum of the head drum assembly; A plurality of fixing protrusions are formed to protrude from each other at predetermined intervals along both side ends and the fixing protrusions protruding at a predetermined position at the rear end of the processing surface, and the head base is between the plurality of fixing protrusions pair; It can be achieved by the head base fastening structure of the head drum assembly, characterized in that the lower end is pressed in close contact with the processing surface is pressed in contact with the both ends and the rear end respectively in the fixing projections.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the headbase fastening structure of the head drum assembly according to the present invention will be described in detail.

3 to 4b are shown a preferred embodiment of the bearing indentation apparatus according to the present invention, the description of the same parts as the conventional configuration of the configuration of the present invention will be omitted. Accordingly, the head base fastening structure of the present invention is a head that is fastened to the bottom surface of the processing surface 102 and a plurality of pairs of fixing protrusions (103a, 103b) (104a, 104b) and the fixing protrusions 105 and the upper drum (100) It consists of a base 106.

The movable surface 102 is formed to protrude horizontally with a predetermined size at a predetermined position of the bottom surface of the upper drum 100, and the plurality of fixing protrusion pairs on both side and rear ends of the processing surface 102, respectively ( 103a and 103b, 104a and 104b and the fixing protrusion 105 are formed respectively.

The plurality of fixing protrusion pairs 103a and 103b and 104a and 104b are protruded to face each other at predetermined intervals along both side ends of the processing surface 102, and the side surface portion of the mask surface 102 is in a plane. Is formed.

The fixing protrusion 105 is formed to protrude at a predetermined position on the rear end side of the processing surface 102, and the side of the processing surface 102 side is the same as the fixing protrusion pairs 103a and 103b and 104a and 104b. It is formed into a plane.

An interval D between the plurality of fixing protrusion pairs 103a and 103b and 104a and 104b is formed to be narrower than the width d of the head base 106.

In the accompanying drawings, reference numeral 101 denotes a head disposition groove, and 107 denotes a head.

Head base fastening structure of the head drum assembly according to the present invention having the configuration as described above is fixed to the head base 106 so that the head 107 is disposed in the head arrangement groove 101 of the upper drum 100 Both ends are arranged between the protrusion pairs 103a and 103b and 104a and 104b, and the rear end is inserted into the fixing protrusion 105, and one surface portion is pressed into close contact with the processing surface 102. The head 107 is fastened to the bottom surface, and the head 107 is not only disposed at the correct position by the plurality of fixing protrusion pairs 103a and 103b 104a and 104b and the fixing protrusion 105 and the machining surface, but also the head base. 106 can be securely fastened to the predetermined position of the bottom portion of the upper drum (100).

As described above, the head base fastening structure of the head drum assembly according to the present invention is such that the head 107 at a predetermined position on the bottom portion of the upper drum 100 can be positioned at the correct angle to the head arrangement groove 101. A plurality of fixing protrusion pairs 103a and 103b, 104a and 104b and the fixing protrusion 105 are formed to protrude, and a protrusion surface 102 is formed to maintain the head base 106 horizontally to form the processing surface ( According to the fastening of the head base 106 by press-fitting between the plurality of pairs of fixing protrusions 103a and 103b 104a and 104b and the fixing protrusion 105 such that one surface portion of the head base 106 is in close contact with each other. The head base 106 is mounted on the upper drum 100 so that the head 107 can be placed in the correct position by pressing the head base 106 once without needing to adjust the position of each head 107. Assembly productivity can be remarkably improved by being fastened to the bottom part of the In addition, it is possible to minimize the defective rate of the head drum assembly due to the poor position of the head 107, as well as to reduce the manufacturing cost by eliminating the number of parts such as screws, etc., and to reduce the size of the head drum assembly, thereby miniaturizing it. To have.

Claims (4)

In the headbase fastening structure of the head drum assembly, a processing surface 102 formed at a predetermined position on the bottom surface of the upper drum 100 of the head drum assembly, and a predetermined position at both ends of the processing surface 102. And a plurality of pairs of fixed protrusions 103a, 103b (104a, 104b) each formed at predetermined intervals along both side ends of the machining surface 102, and protruding at predetermined positions at the rear end of the machining surface 102. It has a fixed projection 105 integrally, the head base 106 between the plurality of pair of fixing projections (103a, 103b) (104a, 104b) and the fixing projections 105 so as to abut both ends and rear ends respectively. The head base fastening structure of the head drum assembly, characterized in that the bottom surface is pressed in close contact with the processing surface (102). The head of the head drum assembly according to claim 1, wherein the pair of fixing protrusions (103a, 103b) (104a, 104b) and the fixing protrusion (105) are formed in a planar side surface of the processing surface (102). Base fastening structure. The headbase fastening structure of a head drum assembly according to claim 1, wherein the processing surface (102) is horizontally formed. 3. The head according to claim 1 or 2, wherein the distance (D) of the pair of fixing protrusions (103a, 103b) (104a, 104b) is formed to be narrower than the width (d) of the head base (106). Head base fastening structure of the drum assembly.