JPH07176023A - Position and posture adjusting device for head - Google Patents

Abstract

PURPOSE:To miniaturize the device and to facilitate its assemblage by simplifying its structure. CONSTITUTION:An adjusting base 23 has 1st-3rd plane parts 29, 31 and 33 approximately parallel to one another. By adjusting a screw-in amt. of an adjusting screw 34, a bending amt. of a connecting part 30 is changed to adjust an inclined angle of the 2nd plane part 31 in the forward and backward directions. Similarly, by adjusting a screw-in amt. of an adjusting screw 35, an inclined angle of the 3rd plane part 33 in the right and left directions is adjusted. Thus, inclined angles of a head part 37 in the forward and backward and also right and left directions are adjusted. The plane part 29 is given upward force by repulsion of a supporting part 28 formed by bending this part downward. On the other hand, by tightening a nut 25, the 1st plane part 29 is pressed downward, and the head part 37 is adjusted in height by this tightening ant. The adjusting base 23 is to be rotated by a leaf spring 40 formed by bending a projecting piece 39 of the 1st plane part 29. This rotation is stopped by a tapered screw 42, and by its screw-in amt., ocsillation of the head part 37 in a horizontal plane is adjusted.

Description

Detailed Description of the Invention

[Object of the Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head position and attitude adjusting device suitable for adjusting the position and attitude of an audio control head or an audio erasing head.

[0002]

2. Description of the Related Art Conventionally, in a magnetic recording / reproducing apparatus for recording video and audio on a magnetic tape, an audio control head (hereinafter referred to as A / C head) for recording / reproducing a control signal and an audio signal is used as a fixed head tape. It is placed in the path. An audio erasing head (hereinafter, referred to as A / E head) for erasing an audio signal is also arranged in the tape path as a fixed head. The A / C head and the A / E head are used to record a control signal and an audio signal at a predetermined position on the magnetic tape, and reproduce or erase the recorded control signal and audio signal.

In this case, the relative position and orientation of the head with respect to the magnetic tape are important in order to reliably trace the control track and audio track. In mass production, errors often occur during assembly. Therefore, a mechanism for adjusting the position and posture of the fixed head such as the A / C head and the A / E head after assembling is adopted.

FIG. 4 is a perspective view showing such a conventional head position and posture adjusting device.

The adjustment parameters required for the A / C head and the A / E head are azimuth and tilt, which are inclinations of two degrees of freedom orthogonal to each other, height (Z height), and in the horizontal plane of the entire adjustment device. The four swings (X value) are generally used. It is desirable that these adjustment parameters can be adjusted independently of each other.

In FIG. 4, a shaft 1 is planted in a base portion (not shown). A coil spring 2 is provided on the shaft 1, an opening of a plate-shaped adjusting table 3 is fitted therein, and a washer 4 is fitted outside.
The washer 4 is fixed to the adjusting table 3. A nut 5 for pressing the upper end of the washer 4 is screwed onto the upper portion of the shaft 1. The coil spring 2 is provided between the base portion and the adjustment base 3 to urge the adjustment base 3 upward. Further, one end of the coil spring 2 is locked to a locking portion 6 fixed to the base portion, and the other end is formed with a hook 7, and the hook 7 is hooked on a side portion of the adjustment base 3 to horizontally move the adjustment base 3. It is designed to urge clockwise. A taper screw 8 is also screwed into the base portion. The taper portion 8 of the taper screw 8 is in contact with the side surface of the adjustment base 3 so that the rotation stop position of the adjustment base 3 in the horizontal direction is determined against the biasing force of the coil spring 2.

A support material 11 having a tapered tip is planted on the adjusting table 3, and a head base 12 having a locking hole 13 on the lower surface is locked to the locking hole 13 at the tip of the supporting material 11. To support. An opening is provided at one end of the head base 12, and the shaft 10 planted on the adjusting base 3 is inserted into this opening. A convex portion 14 is formed on the upper end of the shaft 10, and the shaft is provided between the convex portion 14 and the head base 12.
A head spring 12 is urged downward by a coil spring 15 provided on the head 10. An opening is also provided at the other end of the head base 12, and a screw 16 to be screwed into the adjustment base 3 is inserted, and the head 17 of the screw 16 presses the head base 12 downward. The other end of the head base 12 is provided with an opening whose inner peripheral surface is threaded, and a screw 18 whose tip abuts at a contact point S of the adjusting base 3 is screwed into the head base 12. A head portion 19 to which a head (not shown) is attached is arranged on the head base 12.

By tightening the nut 5, the adjusting table 3 is displaced in the height direction against the biasing force of the coil spring 2.
Thereby, the Z height is adjusted. The coil spring 2 urges the adjustment table 3 in a horizontal clockwise direction about the shaft 1. The taper portion 9 of the taper screw 8 suppresses the rotation of the adjustment table 3. That is, by adjusting the screwing amount of the taper screw 8, the swing (X value) of the adjusting table 3 in the horizontal plane is adjusted. Further, by adjusting the screwing amounts of the screws 17 and 18, the inclination (azimuth and tilt) of the head portion 19 with respect to the tape running direction and the vertical direction thereof is adjusted.

As described above, the apparatus of FIG. 4 can adjust the above-mentioned four adjustment parameters substantially independently.

However, the structure is extremely complicated,
It is difficult to miniaturize. Moreover, in addition to the assembly work by simply screwing, the work of hooking the spring and the extremely complicated assembly work of fitting the member with the spring sandwiched are required, which requires a long time for the assembly. Also, there are many types of parts and the number of parts.

[0011]

As described above, in the above-mentioned conventional head position and posture adjusting device, the structure is complicated and downsizing is difficult, and the assembling work is extremely complicated. There was a problem that there are many types and scores.

The present invention simplifies the structure by integrating the plate-like elastic body without deteriorating the adjustment accuracy, reduces the type and number of parts, and enables downsizing. An object of the present invention is to provide a head position / posture adjusting device that can facilitate assembly work.

[Constitution of Invention]

A head position / posture adjusting device according to the present invention comprises a first tilt angle adjusting portion formed by bending a plate-like elastic body in a predetermined direction at a first connecting portion, A second inclination angle adjusting portion formed by bending the first inclination angle adjusting portion in a direction substantially orthogonal to the predetermined direction at the second connecting portion, and disposed on the second inclination angle adjusting portion. First adjusting means for adjusting the bending amount of the first connecting portion in order to adjust the inclination angle of the head portion to be moved,
Second adjusting means for adjusting the bending amount of the second connecting portion in order to adjust the inclination angle of the head portion.

[0014]

In the present invention, the first adjusting means provides the first
The inclination angle adjusting portion can change the inclination angle in the up-down direction with respect to the bending direction with the first connecting portion as a fulcrum. Further, the second adjusting means can change the inclination angle of the second inclination angle adjusting portion in the up-down direction with respect to the bending direction with the second connecting portion as a fulcrum. As a result, when the head section is arranged on the second tilt angle adjusting section,
By adjusting the first and second adjusting means, for example, the front-back direction and the left-right direction of the head portion, that is, the azimuth and tilt can be adjusted.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of a head position / orientation adjusting device according to the present invention. 1A shows a front view, FIG. 1B shows a side view, and FIG.
Shows a plan view.

A shaft 22 is planted in the base portion 1. Adjusting stand 23
The shaft 22 by inserting the shaft 22 through the opening provided at the end.
It is provided by 22 so as to be rotatable in the horizontal direction. The washer 24 is attached to the shaft 22 by bringing it into contact with the upper surface of the adjustment table 23. The washer 24 is fixed to the adjusting table 23. The shaft 22 has a screw portion 26 at the upper end, and a nut 25 is attached to the screw portion 26 to press the upper end of the washer 24.

The adjusting table 23 is composed of a plate-like elastic member, and is bent in a U-shape to have a multi-stage structure. An end portion 27 of the first flat surface portion 29 forming the first step is bent downward at an acute angle to form a support portion 28.
The lower end of the support part 28 is pressed against the base part 21, and the elastic force of the support part 28 allows the adjustment table 23 to be vertically displaced.

A rear end (upper end in FIG. 1C), which is the other end of the first flat surface portion 29 of the adjusting table 23, is bent in a U-shape, and the bent portion is used as a connecting portion 30 to form a first portion. The second plane portion 31 of the second step is formed substantially parallel to and above the plane portion 29. Further, the right end of the second flat surface portion 31 (the right end portion in FIG. 1C) is also bent in a U-shape, and the bent portion is used as a connecting portion 32 substantially parallel to the second flat surface portion 31 and upward in the third step. And constitutes the third flat surface portion 33. The bending direction of the connecting portions 30 and 32 is
As shown in FIG. 1, they are substantially orthogonal when viewed from above.

The second plane portion 31 is tiltable up and down with respect to the front-rear direction (direction A in FIG. 1) about the connecting portion 30 as a fulcrum.
Further, the third plane portion 33 can be tilted vertically with respect to the left-right direction (direction B in FIG. 1) with the connecting portion 32 as a fulcrum. Second
An opening is provided on the front side of the flat surface portion 31, and an adjusting screw 34 that is screwed into the first flat surface portion 29 is inserted into this opening. An opening is provided on the left side of the third flat surface portion 33, and an adjusting screw 35 that is screwed into the second flat surface portion 31 is inserted into this opening. The screws of the third flat surface portion 33
A notch 36 is formed above 34 so as to facilitate the screwing of the adjusting screw 34. A head portion 37 having a magnetic head (not shown) is arranged on the right side of the rear portion of the third plane portion.

An L-shaped protruding piece 39 is provided at the front end of the first flat surface portion 29, and the protruding piece 39 is bent downward at a substantially right angle to form a leaf spring.
Form 40. The leaf spring 40 is pressed against a stopper 41 fixed to the base portion 21. The leaf spring 40 urges the adjusting table 23 in the horizontal counterclockwise direction. A taper portion 43 of a taper screw 42 screwed into the base portion 21 is brought into contact with the left end surface of the first flat surface portion 29.

The connecting portions 30 and 32 may be made thinner or thinner so that the adverse effects of bending may be reduced.

The operation of the embodiment thus constructed will be described with reference to FIGS. 2 and 3. FIG. 2A is a front view for explaining the adjustment of the inclination in the left-right direction.
(B) is a side view for explaining the adjustment of the inclination in the front-rear direction. Further, FIG. 3 is a plan view for explaining the arrangement of the head portion.

An opening provided on the left side of the first flat surface portion 29 of the adjusting table 23 is fitted into the shaft 22 provided on the base section 21, and the adjusting table 23 is pressed downward by the nut 25 via the washer 24. The support portion 28 whose lower end is in pressure contact with the base portion 21 has an elastic force, and the nut 25
The height of the adjustment base 23, that is, the head portion 37
Adjust the Z height of.

Further, the leaf spring 40 constituted by the protruding piece 39 of the adjusting table 23 is pressed against the stopper 41, and at the same time, the first flat surface portion is formed.
The taper portion 43 of the taper screw 42 is brought into contact with the left end surface of 29.
That is, due to the repulsive force of the leaf spring 40, the adjusting table 23 tries to rotate in the horizontal counterclockwise direction about the shaft 22. This rotational force is suppressed by the taper screw 42, and the horizontal rotation stop position of the adjusting table 23, that is, the swinging (X value) of the head portion 37 in the horizontal plane is adjusted by the screwing amount of the taper screw 42.

The first flat surface portion 29 of the adjusting table 23 is fixed by the support portion 28 and the washer 24 to maintain a substantially horizontal state.
Here, if the screwing amount of the adjusting screw 34 is increased, as shown in FIG.
As shown by the broken line in (b), the front end of the second flat surface portion 31 is lowered downward. That is, the second plane portion 31 is inclined downward with respect to the front-rear direction with the connecting portion 30 as a fulcrum. On the contrary, when the screwing amount of the adjusting screw 34 is reduced, the second flat surface portion 31 inclines upward with respect to the front-rear direction with the connecting portion 30 as a fulcrum, as shown by the solid line in FIG. In this way, by adjusting the screwing amount of the adjusting screw 34, it is possible to adjust the vertical inclination of the second flat surface portion 31 with respect to the front-rear direction, that is, the inclination of the head portion 37 in the front-rear direction A.

Similarly, with respect to the third plane portion 33, by changing the screwing amount of the adjusting screw 35, as shown in FIG.
As shown by the solid line and the broken line of
The tilt angle in the up-down direction with respect to the left-right direction can be adjusted with the connecting portion 32 as a fulcrum. Assuming that the second flat surface portion 31 does not tilt in the left-right direction, the vertical tilt of the third flat surface portion 33 with respect to the left-right direction, that is, the tilting of the head portion 37 in the left-right direction B, depending on the screwing amount of the adjusting screw 35. Can be adjusted.

As shown in FIG. 1C, a nut 25 for adjusting the Z height and a taper screw 42 for adjusting the X value are provided.
Also, the adjusting screws 34 and 35 for adjusting the front-rear direction A and the left-right direction B (azimuth or tilt) can be adjusted from above. Moreover, a cutout is formed in the third plane portion 33.
36 is provided so that the adjustment screw 34 can be easily adjusted. This facilitates adjustment, simplifies design, and reduces space.

By the way, in the present embodiment, as shown in FIG. 3, the head portion 37 is arranged at the right rear end portion of the third flat portion 33 of the adjusting table 23. That is, a position in the vicinity of the connecting portions 30 and 32 that serves as a fulcrum when adjusting the inclination angle of the head portion 37, that is, in a plan view, an intersection point between the extension of the side surface of the connecting portion 30 and the extension of the side surface of the connecting portion 32 ( A head portion 37 is arranged in the vicinity of point C in FIG. 3 (hatched portion in FIG. 3). As a result, FIG.
As shown in (a) and (b), it is possible to minimize the deviation of the head portion 37 in the height direction caused by the adjustment of the inclination angle by the adjusting screws 34 and 35, and to simplify the adjustment. it can.

Thus, in this embodiment, the adjustment table
Since 23 is formed by bending an elastic member and can be integrated without using a spring component, the number of components can be reduced and the size can be reduced. In addition, since the structure is integrated, the number of insertion into the shaft and the number of screws is small, and the coil spring which is complicated to assemble is not used, the assembly is remarkably easier than the conventional one. Moreover, each adjustment parameter can be adjusted substantially independently, and each adjustment can be performed from the same direction, resulting in high workability. Further, since the head portion is arranged in the vicinity of the connecting portion which serves as a fulcrum when adjusting the inclination angle, the deviation in the height direction is small and the adjustment is easy.

In the present embodiment, all the adjustment parameters can be adjusted by bending the adjustment base which is an elastic member. However, for example, instead of the support portion 28, a coil spring is used for the adjustment in the height direction. As described above, it may be configured in combination with the adjustment mechanism in the conventional example.

[0031]

As described above, according to the present invention, the structure is simplified and the type and the number of parts are reduced by making the plate-like elastic body into an integral structure without degrading the adjustment accuracy. Thus, it is possible to reduce the size and facilitate the assembling work.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a head position / orientation adjusting device according to the present invention.

FIG. 2 is an explanatory diagram for explaining the operation of the embodiment.

FIG. 3 is a plan view for explaining the operation of the embodiment.

FIG. 4 is a perspective view showing a conventional head position and attitude adjusting device.

[Explanation of symbols]

22 ... Shaft, 23 ... Adjusting stand, 25 ... Nut, 28 ... Support section, 29 ... First flat section, 30, 32 ... Connecting section, 31 ... Second flat section, 33 ... Third
Flat part, 34, 35 ... Adjusting screw, 37 ... Head part, 40 ... Leaf spring, 42 ... Tapered screw

Claims (6)

[Claims] 1. A first inclination angle adjusting portion formed by bending a plate-like elastic body in a predetermined direction at a first connecting portion, and the first inclination angle adjusting portion at a second connecting portion. A second inclination angle adjusting portion formed by bending in a direction substantially orthogonal to the direction, and the first connecting portion for adjusting the inclination angle of the head portion disposed on the second inclination angle adjusting portion. And a second adjusting means for adjusting the bending amount of the second connecting portion in order to adjust the tilt angle of the head portion. Head position and attitude adjustment device. 2. The first adjusting means screw-fastens the first tilt angle adjusting portion to a predetermined fixing portion with a first adjusting screw, and adjusts a screw-in amount to adjust the first adjusting angle. Adjusting the bending amount at the connecting portion, the second adjusting means screw the second tilt angle adjusting portion to the first tilt angle adjusting portion with a second adjusting screw, and adjust the screwing amount. The second by adjusting
The position and posture adjusting device for a head according to claim 1, wherein the bending amount in the connecting portion of the head is adjusted. 3. A support part formed by bending the plate-like elastic body downward, and a downward direction of the plate-like elastic body against an upward repulsive force when the support part is pressed against a predetermined fixing part. 3. A height adjusting means for adjusting the height of the head portion by pressing the plate elastic body to adjust the height of the plate-like elastic body is added, according to claim 1 or 2. Head position and attitude adjustment device. 4. A shaft for rotatably supporting the plate-like elastic body in a horizontal plane, a preload portion formed by bending the plate-like elastic body, and a preload portion when the preload portion is pressed against a predetermined fixing portion. A swing for adjusting the swing of the head portion in a horizontal plane by pressing the plate-like elastic body in the opposite horizontal direction against the repulsive force in the horizontal direction to adjust the rotation stop position of the plate-like elastic body. 4. The head position and attitude adjusting device according to claim 1, further comprising a dynamic adjusting means. 5. The position for a head according to claim 4, wherein each of the first and second adjusting means, the height adjusting means and the swing adjusting means can be adjusted from one direction. Posture adjustment device. 6. The head position according to claim 1, wherein the second adjusting means disposes the head portion near the first and second connecting portions. And attitude adjustment device.