JPS63167461A - Tape guiding device - Google Patents

Abstract

PURPOSE:To omit an adjusting function and to stabilize accuracy, by fixing a guide member and a flange member on a housing after the vertical part of the guide member and the height and the parallelism of the flange member are set. CONSTITUTION:The perpendicularity of the reference place C of a jig 40 is set with high accuracy against the reference plane B, and the perpendicularity of the tape contact plane 11a of a tape sliding part 11 is set with the high accuracy against the reference plane A of the housing 7 placed on the reference plane B. Also, the height and the parallelism of the reference plane D of the jig 40 is set with high accuracy against the reference plane B, and the height and the parallelism of the tape contact plane 17a of a lower flange 17 is set with high accuracy against the reference plane of the housing. Next, in such state, a bonding agent is injected from small holes 22 and 30, then, the guide member 1 and the flange member 3 are fixed on the housing.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is most suitable for application to, for example, a tape recorder, and includes a guide member that contacts the surface of the tape and a flange member that contacts the edge of the tape. The present invention relates to a tape guide device having the following.

[Summary of the invention]

The present invention provides a tape guide device, such as a tape recorder, which has a guide member that contacts the surface of the tape and a flange member that contacts the edge of the tape, in which the guide member and the flange member are incorporated into a housing together with a biasing means. , after setting the perpendicularity of the guide member and the height and parallelism of the flange member with respect to the reference plane of the housing,
By identifying these guide members and flange members to the housing, the accuracy required for the tape guide device can be easily achieved at the time of assembly.

[Conventional technology]

Traditionally, a typical tape guide device in a tape recorder, etc. is composed of a cylindrical or cylindrical guide member that contacts the surface of the tape, and disc-shaped upper and lower flanges that contact the tape's upper and lower edges and nozzles. By sliding the tape on the surface of the guide member while regulating the upper or lower edge of the tape with the upper or lower flange, the direction of tape running and the height are determined.

By the way, in order to achieve stable tape running, the verticality (so-called tilt) of the guide member and the upper edge of the tape are controlled by the upper flange so that the guide member is in reliable contact with the entire width of the tape. In this case, the height and parallelism of the upper flange, and in the case where the lower edge of the tape is controlled by the lower flange, the height and parallelism of the lower flange must be controlled with high precision. In order to obtain a tape guide device that satisfies these items, conventionally,
By tilting the guide shaft to which the guide member and the upper and lower flanges are attached, and by providing an adjustment mechanism that moves the guide member and the upper and lower flanges up and down with screw engagement with respect to the guide shaft, the accuracy of each component alone can be improved in advance. A method was adopted to do so.

[Problem that the invention seeks to solve]

However, in conventional tape guide devices, when an adjustment mechanism is provided to satisfy the required accuracy, each adjustment is extremely troublesome, and it is difficult to maintain stable accuracy at all times, resulting in extremely poor productivity. There was a problem. Also, if you want to improve the accuracy of each component individually in advance,
The problem is that the entire tape guide device becomes extremely costly.

Therefore, the present invention makes it possible to easily obtain the necessary accuracy at once during assembly.

[Means for solving problems]

The present invention provides a guide member that contacts the surface of the tape, a flange member that contacts the edge of the tape, a biasing device that presses the guide member and the flange member, and a guide member, the flange member, and the biasing device. The perpendicularity of the guide member with respect to a reference plane provided on the housing can be adjusted by pressing the guide member and the flange member, which are assembled into the housing, with the urging means. The height and parallelism of the flange member are set, and the guide member and flange member are fixed to the housing in these set states.

[Effect]

According to the present invention, the guide member and the flange member are assembled into the housing together with the biasing means, and the perpendicularity of the guide member and the height and parallelism of the flange member are set with respect to the reference plane of the housing. A guide member and a flange member are secured to the housing. Therefore, there is no need for an adjustment mechanism, and even if the accuracy of each component is low,
The required precision can be easily achieved at the time of assembly.

〔Example〕

An embodiment in which the present invention is applied to a tape guide device in a tape recorder will be described below with reference to the drawings.

First, the tape guide device includes a guide member 1, an upper flange member 2, a lower flange member 3, a biasing means 4.5.6 for pressing these, and a housing 7 in which these are incorporated.
It is composed of.

The guide member 1 has a tape sliding part 11 made of abrasion-resistant artificial ruby, ceramic, etc. bonded to the front end of a prismatic base 10 made of brass or the like. The contact surface 11a has a predetermined curvature. The upper flange member 2 has a circular chip-shaped upper flange 14 made of artificial ruby, ceramic, or the like joined to the tip of a cylindrical base 13 made of brass or the like.

The lower flange member 3 also has a similar lower flange 17 joined to the tip of a similar base 16.

The biasing means 4.5.6 are for pressing the guide member 1, the upper flange member 2, and the lower flange member 3, and here a compression coil spring and a leaf spring are used. It is formed of brass or the like into a substantially rectangular parallelepiped shape, and an opening 20 is provided at the upper front end thereof. The rear of the opening 20 is a recess 21 open to one side, and a small hole 22 communicating with the rear end of the housing 7 is provided at the rear end of the recess 21 . Note that a lid 23 is attached to the recess 21 with screws 24.

Further, vertical insertion holes 26 and 27 are provided in the upper and lower parts of the opening 20, respectively. A lid 28 is attached above the upper insertion hole 26 with screws 29, and a small hole 30 communicating with the front end of the housing 7 is provided in the lower insertion hole 27. Further, at the lower portions of the front and rear ends of the housing 7, mounting portions 32 are extended horizontally in the front and back.
33 are formed, and the lower surfaces of these reattachment parts 32 and 33 serve as the reference plane A of the housing 7.

Next, the tape guide device made up of the components as described above is assembled using the jig 40.

That is, the jig 40 is a block made of strong metal, and a base portion 41 and a positioning portion 42 are integrally formed into a substantially U-shape. As shown in FIG. 2, the upper surface of the base 41 is a reference plane B, and the tip and lower surfaces of the positioning part 42 are reference planes C and D. The perpendicularity of the reference surface C with respect to the reference surface B is set with high precision, and the height h and parallelism of the reference surface with respect to the reference surface B are set with high precision.

Next, to assemble the tape guide device, as shown in FIG. 6, and insert the guide member 1 and biasing means 4 into the recess 21.

The M2S, 28 is then attached to the housing 7 by screws 24, 29. Then, attach the housing 7 to the mounting part 32.3.
3 onto the base 41 of the jig 40 with screws 44. The guide member 1 is pressed in the direction of arrow a by the biasing means 4, and the tape contacting surface 11a of the tape sliding portion 11 is brought into contact with the reference surface C of the jig 40 and positioned. Further, the lower flange member 3 is pressed in the direction of the arrow by the urging means 6, and the tape contacting surface 17a of the lower flange 17 is brought into contact with the reference surface of the jig 40 and positioned. Further, the upper flange member 2 is pressed in the direction of arrow C by the urging means 5, and the tape contact surface 14a of the upper flange 14 is brought into contact with the upper end of the tape sliding portion 11 of the guide member 1.

Here, since the perpendicularity of the reference surface C of the jig 40 with respect to the reference surface B is set with high precision, the tape slides with respect to the reference surface A of the housing 7 placed on the reference surface B. The perpendicularity of the tape contact surface 11a of the portion 11 is set with high precision. In addition, since the height h and parallelism of the reference surface of the jig 40 with respect to the reference surface B are set with high accuracy, the height of the tape contact surface 17a of the lower flange 17 with respect to the reference surface A of the housing 7 is set with high precision. The height h and parallelism are set with high precision. Then, in these settings, adhesive 46 is injected through the small holes 22 and 30 to fix the guide member 1 and the lower flange member 3 to the housing 7. As a result, the necessary accuracy in perpendicularity, height, and parallelism can be easily achieved at once during assembly.

In addition, in the tape sliding part 11 and the lower flange 17, only the tape contact surface 11a that contacts the reference surface C of the jig 40 and the tape contact surface 17a that contacts the reference surface are finished with high precision. This makes it possible to reduce the accuracy of each individual component.

The tape guide device assembled as described above is
As shown in FIG. 3, the housing 7 is mounted on the mounting board 48 of the tape recorder with screws 44. Then, the surface 50a of the tape 50 is wound around the tape contact surface 11a of the tape sliding portion 11 at a predetermined angle and is run, and the lower edge 50b of the tape 50 is brought into contact with the tape contact surface 17a of the lower flange 17, and the tape 50 height is regulated.

At this time, the tape contact surface 11a of the tape sliding portion 11
is perpendicular to the reference plane A of the housing 7 with high precision, so that the tape contact surface 11a reliably contacts the entire width of the surface 50a of the tape 50. In addition, since the tape contact surface 17a of the lower flange F has a height h and parallelism with respect to the reference surface A of the housing 7 with high precision,
The lower edge 50b of the tape 50 is regulated very precisely.

Note that if the tape 50 is deflected upward, the upper edge 5
0C is restricted by the upper flange 17, but since the upper flange 17 is moved upward against the biasing means 5, the upper edge 50c is not damaged.

Although one embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and various effective changes can be made based on the technical idea of the present invention.

For example, in the example, the lower edge of the tape is restricted by the lower flange member, but if the upper edge of the tape is restricted by the upper flange member, it is sufficient to press the upper flange member against the jig and fix it. . Further, the urging means is not limited to the spring as in the embodiment, but may be configured to be pressed by tightening a screw. In this case, it is not necessary to use adhesive.

Note that the present invention is not limited to tape guide devices in tape recorders, but can be applied to tape guide devices in various recording and reproducing devices such as video tape recorders.

〔Effect of the invention〕

The present invention incorporates the guide member and the flange member into the housing together with the biasing means, sets the perpendicularity of the guide member and the height and parallelism of the flange member with respect to the reference plane of the housing, and then sets the guide member and the flange member together with the biasing means. and the flange member is fixed to the housing. Therefore, the perpendicularity of the guide member and the height and parallelism of the flange member required for the tape guide device can be assembled at the same time, making it possible to maintain stable precision at all times and significantly improving productivity. You can improve your performance.

Furthermore, since accuracy is achieved through assembly, it is possible to reduce the accuracy of each individual component, and as a result, the cost of the tape guide device can be significantly reduced.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a tape guide device in a tape recorder, in which FIG. 1 is an exploded perspective view of the entire device and a jig, and FIG. 2 is an assembly diagram using the jig. Fig. 3 is a longitudinal sectional view of , and Fig. 3 is a side view during use. In addition, in the symbols used in the drawings, 1-------1-- Guide member 2--...
−・−・・−Top flange member 3−・〜・−・・−・
・−Lower flange member 4.5.6−・・・Biasing means 7−−−−−−−Housing 11・−
・−1−−−−−−−−−・−Tape sliding part 14 ・・
−・−−−−−−−・・−−−−−・Upper flange 17・
・−・・−・・・・・・・−・Lower flange 21・−・
−・−・・−・−・・Recessed part 26.27−−−・−・−−−One insertion hole 32.33−
・・・−・・・−Mounting part 40−・−・・−・−・・−・・−・Jig 46−・・・・・
・・・・・・Adhesive 50・・−・−−−1−
・−・−・・Tape 50a −・・・・・・・−・・・
・-・-Surface 50b-・・-・・--Lower edge 50c・・--11----- Upper work・7ji A
・ ・ ・ ・ ・ ---- ・ ・ ・ ・ ・ ・ ・ ・ -----

Claims (1)

[Scope of Claims] A guide member that contacts the surface of the tape, a flange member that contacts the edge of the tape, biasing means that presses the guide member and the flange member, respectively, and the guide member, the flange member, and the biasing member. and a housing in which the means is incorporated, and by pressing the guide member and the flange member incorporated in the housing with the biasing means, the guide member is perpendicular to a reference plane provided in the housing. The tape guide device comprises setting a degree, a height and a parallelism of the flange member, and fixing the guide member and the flange member to the housing in these set states.