JPS6059560A - Travelling device of tape - Google Patents

Abstract

PURPOSE:To suppress the quantity of waving generated at the tape travelling at its minimum by travelling the tape like a chevron only by a head leading end part entering into an opening part, the 1st pin inserted into the 1st hole and the 2nd pin inserted into the 2nd hole. CONSTITUTION:At the charging of a cassette half 20 to a frame, the 1st pin 39 is inserted into the 1st hole 46 of the cassette half 20 and the 2nd pin 40 is inserted into the 2nd hole 49. At the travelling of the tape 23, a recording/reproducing head 31, tape guides 32, 33, an erase head 34, and a pinch roller 35 enter into respective opening parts 26-30 of the cassette half 20 and the tape 23 is driven and travelled by the pinch roller 35 and a capstan 36. At that time, the tape 23 is travelled like a chevron only by the tape-contacted curved surface 41 of the head 31, the peripheral side 59 of the 1st pin 39 and the peripheral side 63 of the 2nd pin 40.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape running device provided in a cassette tape recorder.

1N is a plan view showing the main parts of a conventional tape running device, and FIG. 2 is an enlarged cross-section ν1 of section A in FIG. 1.

In FIG. 1, 1 is a structure constituting the lower half of the cassette half, 2 is a tape stored in the cassette no. 1/C, and 3 is a tape stored in the cassette no. A guide roller that guides the tape 2, and a tape guide bin that is provided on the 4-cassette half and guides the tape 2.

5, 6, 7, 8.9 are openings formed in the front surface of the structure 1, that is, the cassette half, of which the recording/reproducing head 10 can enter and retreat into the opening 5; , 7 are tape guides 1 and 1.2 that restrict the movement of the tape 2 in the downward direction, that is, in the width direction, an erasing head 3 is inserted into the opening 8, and a pinch roller 14 is inserted into the opening 9, respectively. , it is possible to retreat. Note that 15 is a capstan, and 16 and 17 are wall members that are provided near the opening 5 and have end surfaces with which the tape 2 can come into contact, and are provided integrally with the structure 1. These wall members 16,1
7 has the function of regulating the tape 2 from slack when the recording/reproducing head 10 is not entering the opening 5.

Note that the above-described recording/reproducing head 10 and tape guide II
, 12. Erase head 13 and pinch roller 14
is movably provided on a frame (not shown) to which the cassette 7 containing the component 1 is mounted.

Further, the cassette half structure 1 is formed by integrally joining a structure (not shown) constituting an upper half of the same shape as the structure 1.

In the tape running device configured as described above, when the tape is running, as shown in FIG. 1, the recording/reproducing head 10. Tape guide 11, erase head 13.
The pinch roller 14 enters into each of the openings 5, 6, 7, 8, 9, and is run by the pinch roller 14 and the capstan 15, and especially in the vicinity of the recording/reproducing head 10, the tape 2 is inserted into the recording/reproducing head. 10 and the respective end faces of wall members 16 and 17 and travel in a dogleg shape.

By the way, conventionally, the structural body 1 forming the lower half of the cassette half and the structural body (not shown) forming the upper half are molded by one mold, and the wall members 16, 17, etc. are formed with a punched slope. .

Therefore, in this conventional tape running device, the second
As illustrated in the figure, when the tape 20 is running (the wall member 16
The tape 2 is subjected to pressing forces with different magnitude distributions along its width, for example, when it comes into contact with a wall member j6, etc.
, 17, etc., tend to move upward as shown by arrow 18 in FIG. Although not shown, the structure 1
In the structure (not shown) placed above, the slope of the wall member is symmetrical to that in FIG. 2, so the tape 2
When running, the tape 2 tends to move downward, contrary to the direction of arrow 8 in FIG. That is, this conventional tape running device moves the tape guide 11° 1 during tape running.
Although movement of the tape 2 in the width direction is restricted in the two parts, a phenomenon in which the tape 2 moves in the width direction between the wall member 16 and the wall member 17, that is, a wave wave occurs. .

In addition, in this conventional tape running device, when the cassette half is mounted on a frame (not shown), if the cassette half is mounted without being properly abutted on the surface of the frame, the cassette half may The tape runs in an inclined state, that is, the wall members 16, 17, etc. inside the cassette half are inclined with respect to the normal upright position, and from a different perspective from the above, waving occurs in which the tape 2 moves in the width direction. was.

Recently, the development of high-density recording tape recorders using multi-heads has been progressing, but in order to reliably realize recording and playback operations using narrow tracks in this type of tape recorder, the above-mentioned steps are required. It is necessary to suppress the amount of waving much more severely than in conventional tape recorders currently in use. Therefore, even if the manufacturing precision of the cassette halves constituting the above-mentioned conventional tape transport device were improved, it would be difficult to minimize the problem of waving due to structural reasons, and each of the cassette halves constituting the multi-head It is difficult to equalize the contact surface pressure between the head and the tape 2, and in the end, the above-mentioned tape running device f i'c 3) cannot prevent spacing loss, Difficult to apply to recording tape recorders.

The present invention has been made in view of the actual situation in the prior art, and its purpose is to minimize the amount of waving during tape running, and to create a uniform contact surface between the head and the tape. To provide a tape running device capable of obtaining pressure and running a tape without being affected by the manufacturing accuracy of a cassette half in which the tape is stored.

In order to achieve this object, the present invention provides a cassette half having an opening in which the tape is stored and a head can enter, and the tape is run in a state in which it is in contact with the head in a dogleg shape. , a second pin and a second pin having guide surfaces parallel to an axis passing through the center of curvature of the tape contact curved surface at the tip of the head are provided on the head holding side where the head is movably held. At the same time, a first hole into which the first pin can be inserted and which passes through the cassette half and a second pin are inserted at a position symmetrical with respect to a center line extending in a direction perpendicular to the front surface of the cassette half. A second hole is provided which is possible and passes through the cassette half, and the tip of the head is inserted into the opening, the first pin is inserted into the first hole, and the tape is inserted into the second hole. The configuration is such that only the second pin runs in a dogleg shape.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The tape running device of the present invention will be explained below based on the drawings.

3 to 6 are explanatory diagrams showing one embodiment of the present invention, in which FIG. 3 is a perspective view showing the overall basic configuration, FIG. 4 is a plan view of main parts showing the state during tape running, and FIG. 5 is an enlarged view of portion B in FIG. 4, and FIG. 6 is an enlarged view of portion C in FIG. 4.

In Figures 3 and 4, a first structure 21 forming the lower half and a first structure 21 forming the upper half are made of 20 bacset halves.
A second structure 22 molded in the same shape as the structure 21 of
It is formed by joining them together. The tape contained in the cassette half 20, 24, 25
are a guide roller and a tape guide pin arranged inside the cassette half 20, respectively. 26 , 27 , 28
, 29 and 30 are openings formed on the front surface of the cassette half 2 ( ), of which the recording/reproducing head 3 is placed in the opening 26
1 can enter and retreat, and the openings 27 and 28
Tape guides 32, :, 33 for regulating the movement of the tape device in the vertical direction, that is, the width direction, are provided in the opening 29, and the pinch roller 35 is allowed to enter and retreat into the opening 30. ing.

36 shown in FIG. 4 is a capstan. Note that in order to simplify the explanation, the tape guide 32 is shown in FIG.
, 33, erasing head 34, pinch roller 35, and capstan 3G are not shown.

Further, reference numeral 37 shown in FIG. 3 is a support member that supports the recording/reproducing head 31, and is movably, that is, rotatably held by a frame 38. Reference numerals 39 and 40 designate a first pin and a second pin installed upright on the frame 38, which also serve as positioning pins for positioning, for example, a cassette half adder on the frame 38. A first positioning surface portion 44 having guide surfaces 42 and 43 parallel to the axis 41 a passing through the center of curvature of the cassette half-joint, and a surface parallel to the front surface of the cassette half-joint, a direction perpendicular to the front surface of the cassette half-joint. It has a second positioning surface portion 45 consisting of a surface disposed in
The portion near the top is formed into a tapered shape.

Further, 46 is a first hole formed so as to avoid the opening 26 of the cassette half-joint, into which the first pin 39 can be inserted, and which is provided so as to pass through the cassette half-joint. One hole 47 formed in the first structure 21 of the cassette half addition and the above-mentioned hole 47 formed in the first structure 21 of the second structure 22 also serve as positioning holes for positioning the frame 38. It is formed at a position corresponding to one hole 47.

The hole 47 is composed of the hole 47 and another hole 48 having a different shape. Similarly, 149 is a second hole formed in the cassette half, into which the second pin 40 can be inserted, and which is provided so as to pass through the cassette half 20, for example, to position the cassette no. It also serves as a positioning hole for the cassette no.-7 addition, and is formed in the first structure 21 of the cassette no. The first structure 21 of
[K is formed,
It also includes a hole 51 having the same shape as the one hole 47 described above. Note that the hole 47 constituting the first hole 46 and the hole 51 constituting the second hole 49 have a first hole having an edge portion having a shape corresponding to the first positioning surface portion 44 of the first pin 39. The hole 48 that constitutes the first hole 46 and the ozeki that constitutes the second hole 49 correspond to the second positioning surface portion 45 of the second pin 40. It has a second positioning edge 53 consisting of a shaped edge.

Reference numerals 54 and 55 denote a first wall member and a second wall member that are integrally provided to the first structure 21 of the cassette half, which are disposed at positions avoiding the opening 26, The pin 39 and the second pin 40 are connected to the first hole 46 and the second hole 4.
end surface 56 that can be contacted by the tape device when not inserted into the tape device 9;
, 57. Note that, as shown in FIG. 5, the end surface 56 of the first wall member 54 includes the top tip of the first pin 390 and has a first wall parallel to the front surface of the cassette nozzle.
A first region 6 formed between a plane 58 of the first pin 39 and a second plane 60 circumscribing the circumferential side 59 located on the head entry side of the first pin 39 and parallel to the front surface of the cassette half.
It is set so that it is located at 1. In addition, 2 shown in Figure 5
3a shows the position of the tape device when the first pin 39 is not inserted into the first hole 46, and 23b shows the position of the tape device when the first pin 39 is inserted into the first hole 46. It shows the location.

Similarly, the end surface 57 of the second wall member 55 includes the top tip of the second pin 40 and extends in a third plane direction 62 parallel to the front surface of the cassette half, as shown in FIG. circumscribing the circumferential side surface 63 located on the head entry side of the second pin 40;
and a fourth plane 6 parallel to the front surface of the cassette half.
4 and is located in a second region 65 formed between the two regions. As mentioned above, 23a shown in FIG.
2 shows the position of the tape Z3 in a state where the second pin 40 is not inserted into the second hole 49, 23 b &2
The second pin 40fJ'' shows the position In of the tape device inserted into the second hole 49.

Although not particularly shown in the drawings, the second structure member 22 constituting the upper half of the cassette half 20 is also provided with wall members equivalent to the first wall member 54 and the second wall member 55 described above. .

Reference numeral 66 shown in FIG. 4 is a suppressing member that presses the cassette half toward the head entry side. For example, the lever 67 can be engaged with the cassette half and is rotatably supported by the frame 3B. , this lever 67 is indicated by the arrow 6
It consists of a spring 69 etc. that biases it so that it tends to rotate in eight directions. The suppressing portion 70 of the v-bar 67 of the pressing member 66 is connected to a center line 72 of the rear wall portion 71 on the side opposite to the head entry side of the cassette half, which extends in a direction perpendicular to the front surface of the cassette half 4). At least one of the first portion 73 and the second portion 74, for example, the first portion 73, which is located at a symmetrical position with respect to the first portion 73, is pressed. Note that the distance between the first portion 73 and the center line 72 and the distance between the second portion 74 and the center line 72 are the distances between the center of the first hole 46 and the center of the second hole 49 described above. The distance is set to be approximately equal to 1/2 of the distance.

Further, the first portion 73 and the second portion 74 are formed of a reinforcing portion having a wall thickness sufficiently larger than that of other portions of the rear wall portion 71.

In the tape running device configured in this way, when the cassette half 21) is attached to the frame 38, the first pin 39 is inserted into the first hole 46 of the cassette half, and the first pin 39 is inserted into the second hole 46 of the cassette half. 49, the second pin 40 is pushed in. This is K
Therefore, when the cassette half is added, the first positioning surface portion 44 of the first pin 39 and the first hole 47 constituting the first hole 46
The positioning edge 53 of the hole 50 is positioned at a predetermined position in the direction orthogonal to the centerline 72 by the positioning edge 52 and K of the hole 50 and constitutes the second positioning surface 45 of the second pin 40 and the second hole 49. is positioned at a predetermined position in a direction parallel to the center line 72.

Further, as illustrated in FIGS. 5 and 6 of the tape 23Q stored in the cassette half side, the tape 23Q contacts the circumferential side surface 59 of the first bottle 390 and the circumferential side surface 63 of the second pin 40, and therefore the first The end faces 5 of the wall members 54 and 55 of the structural body 21
6 and 57, and the second
It does not come into contact with each of the end faces of the wall member (not shown) of the structure 4. The first pin 39 and the second pin 40 are, for example, holes arranged in the lower part of the first hole 46 and the second hole 49 (as shown in FIG. 3, a cassette half adder is installed). When the cassette half adder is installed, the hole K is inserted only into holes 47 and 50), and the hole located at the top (holes 48 and 51 when the cassette half adder is installed as shown in Fig. 3). It is set.

When the tape unit is running, as shown in FIG. The tape contacts the curved surface 41 of the recording/reproducing head 31.
It travels in a dogleg shape only by the circumferential side 59 of the first pin 39 and the circumferential side 63 of the second pin 4°. Note that even when the cassette half addition is reversed from the state shown in FIG. 3 and used, the tape device can be run in a dogleg shape in substantially the same manner as described above.

In one embodiment configured in this manner, when the tape device is running, in the vicinity of the recording/reproducing head 31, the tape device can be moved by the first pin 39, the recording/reproducing head 31, and the second pin 40. In other words, it can run without any contact with the first wall member 54, second wall member 55, etc., and the guide surface 42 of the first pin 39 and the guide surface 43 of the second pin 4o is provided parallel to the axis 41a passing through the center of curvature of the tape contacting curved surface 41 at the tip of the recording/reproducing head 31, so the tape contacting curved surface 41 of the recording/reproducing head 31 and the tape device face each other in parallel. Therefore, the movement of the tape in the width direction, that is, the amount of waving, can be suppressed to a minimum, and a uniform contact surface pressure can be obtained between the recording/reproducing head 31 and the tape. Note that even if the cassette half 20 is mounted so as to be slightly inclined with respect to the frame 38, the tape device will be attached to the first pin 39, the recording/reproducing head 3] in the vicinity of the recording/reproducing head 31. , since it runs in a dogleg shape contacting only the second pin 4o, the amount of waving can be suppressed to the minimum as described above, and a uniform contact surface pressure can be ensured. Furthermore, since the first wall member 54, the second wall member 55, etc. do not come into contact with the tape 23 during tape running, the tape device can run without being affected by the manufacturing accuracy of the cassette half assembly. be able to.

Further, in this embodiment, as shown in FIG. 4, the first portion 73 of the rear wall portion 71 of the cassette half is pressed by the pressing member 66, so that the first portion 73 of the rear wall portion 71 of the cassette half is pressed. The distance between the center line 72 and the first portion 73;
Since the distance between the center line 72 and the center of the hole 47 constituting the first hole 46 is set approximately equal, unnecessary bending is applied to the cassette half when the cassette half Δ) is pressed by the suppressing member 66K. No moments are generated and therefore accurate positioning is possible. Further, since the first portion 73 is formed of a reinforcing portion having a sufficient wall thickness, a desired strength can be obtained, and the durability of the addition to the cassette is improved.

Further, in this embodiment, the top tips of the first pin 39 and the second pin 40 are formed into a tapered shape, and the fifth pin 39 and the second pin 40 have tapered tips.
As shown in FIG. 6, the wall member 54 of the cassette half,
Since the end faces of the pins 55, etc. are set to be located within the areas 61, 65, etc., the pin 39 of il, the second pin 4
0 is not inserted into the first hole 46 or the second hole 49, the occurrence of slack in the tape device inside the cassette half can be controlled by the wall member shape, the end face of the cassette half, etc. First pin 39, first hole 4 of second pin 40
6. When inserting into the second hole 49, the tape device is pushed out toward the entrance side of the recording/reproducing head 31, and the circumferential side surface 59 of the first pin 39 and the second pin are attached to the back of the tape device. 4
The circumferential side surface 63 of o can be brought into reliable contact.

Further, in this embodiment, the first pin 39 and the second pin 40, the first hole 46 and the second hole 49 are positioning pins for positioning the cassette half at a predetermined position on the frame road; Since it also serves as a positioning hole, the cassette half 21) can be positioned without requiring any other special positioning pin or positioning hole.

In the above embodiment, the first pin 39 is configured to have the first positioning surface portion and the second striped pin 40 or the second positioning surface portion 45, but the first pin 39 and the second positioning surface portion are It is also possible to form the pins 40 in the same shape and to have both the first positioning surface section 44 and the second positioning surface section 45. In this case, the first hole 46
The two holes forming the second hole 49 and the two holes forming the second hole 49 can all be formed in the same shape.

Further, in the above embodiment, the rear wall portion 71 of the cassette half
The first part 73 and the second part 74 are formed by thick reinforcing parts, but as long as the thickness has sufficient strength, the first part 73 and the second part 74 can be It may be formed with a wall thickness equivalent to that of other parts, or may be formed with four minute parts.

Further, in the above embodiment, the pressing member 66 is composed of a lever 67 and a spring 69, but the suppressing member 66 is not limited to such a structure, and may be composed of a single plate spring having a suppressing portion. can.

Although not provided in the above embodiment, the tape unit is held in place in the cassette half 21) opposite to the entry position of the recording/reproducing head 41 to suppress and pinch the tape unit between it and the recording/reproducing head 31 when the tape unit is running. It is also possible to adopt a configuration in which a conventionally known pad is provided.

Further, in the above embodiment, the first pin 39 and the second pin 40 are located near the recording/reproducing head 31.
, the first hole 46 and the second hole 49 are provided, but the first pin 39, the second pin 4o, and the first hole 4
6. A second set of holes 49 can also be provided, for example, in the vicinity of the entry position of the erasing head 34.

Since the tape running device of the present invention is configured as described above, it achieves the effects listed below.

(1) The amount of waving during tape running can be suppressed to a minimum, and performance such as recording and reproduction is improved compared to the conventional technology.

(2) It is possible to obtain an even contact pressure between the head and the tape, thereby preventing the occurrence of spacing loss, and recording and reproducing etc. performance will be improved.

(3) The tape can be run without affecting the manufacturing accuracy of the cassette half, and therefore the manufacturing accuracy of the cassette half can be lowered compared to the conventional method.
It is possible to reduce manufacturing costs.

(4) The above-mentioned (1), (2), and (3) can be applied to high-density recording tape recorders.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the main parts of a conventional tape running device, FIG. 2 is an enlarged sectional view of section A in FIG. 1, and FIGS. 3 to 6 show an embodiment of the tape running device of the present invention. 3 is a perspective view showing the overall basic configuration, FIG. 4 is a plan view of main parts showing the state during tape running, FIG. 5 is an enlarged view of part B of FIG. 4, and FIG. 6 is an enlarged view of part C in FIG. 4. Add...Cassette half, 21...Track/first composition, n...Second composition, Ru...Tape, 26... Opening, 31...We
Recording and re-bundling head, 38...group frame, 39...
...Part 1 bottle, 40...Song, second pin, 41...
... Tape contact curved surface, 41 a ... Axis line, 4
2, 43・Old guide surface, 44・・First positioning surface portion, 45・・Second positioning surface portion, 46
・・・・・・First hole, 47・Old・One hole, 48・
...Another hole, 49...Second hole, Seki...
...Other holes, 51... Holes, 52...
- First positioning edge, 53 - Old - Second positioning edge, Tatsumi - - First wall member, 55 - Second wall member, 56 , 57 - ...End face, 58.
Old: first plane, 59, 63...circumferential side,
6o・Old...Second plane, 61...First area, 62...Third plane, 64...Choice/Fourth plane, 65... - Second region, 66... Curved/suppressing member, 7o/Old... Pressing part, 71... Rear wall part,
72・Old・Center line, 73・・・・1st part, 7
4...Second part. Fig. 3 Fig. 4 68-0.7/73 74 0 10th day 0 2' Kusu JP-A-6-0-59560 (8) Fig. 5 1 Fig. 6. 5,117.46 is also J, 5 qu ni

Claims (1)

[Scope of Claims] (1) A cassette nozzle is provided which houses a tape and has an opening through which a head can enter, and the tape is run in a dogleg-shaped contact with the head. In the tape running device, a first pin having a guide surface parallel to an axis passing through the center of curvature of the tape contact curved surface of the tip of the head is provided on the head holding side where the head is movably held; A second pin is provided, and the first pin can be inserted into the cassette half at a symmetrical position with respect to a center line extending in a direction perpendicular to the front surface of the cassette half, and the cassette half is a first hole passing through the cassette half; a second hole through which the second pin can be inserted; and a second hole passing through the cassette half; A tape running device characterized in that the tape running device is made to run in a dogleg shape using only a first pin inserted into the first hole and a second pin inserted into the second hole. (2) located at a position symmetrical with respect to a center line extending in a direction perpendicular to the front surface of the cassette half of the rear wall portion on the side opposite to the head entry side of the cassette half;
and at least one of the first portion and the second portion, each located at a distance from the center line approximately equal to 1/2 of the distance between the center of the first hole and the center of the second hole; The tape travel bag ↑break according to claim (1), further comprising a suppressing member that presses toward the head entry i'ta+. (3) The tape running device according to claim (2), wherein the first portion and the second portion are comprised of reinforcing portions. (4) The tape running device d0(5) cassette half according to claim (1) is characterized in that the first pin and the second pin are formed in a tapered shape in the vicinity of their tops. , a first plane including the top tip of the first pin inserted into the first hole and parallel to the front surface of the cassette half, and a circumferential side located on the head entry side of the first pin. a second circumscribed and parallel to the front surface of the cassette half;
a first wall member having an end surface located in a first region formed between the plane of the wall member and the second hole; between a third plane parallel to the front surface of the cassette half and a fourth plane circumscribing the circumferential side of the second pin located on the head entry side tθ and parallel to the front surface of the cassette half; Claim (4) 'J characterized in that it has a second wall member with an end face located in the second region formed.
4 Tape running device on M+'+. (6”) At least one of the first pin and the second pin serves as a positioning pin for positioning the cassette half at a predetermined position, and the first hole and the second hole corresponding to the positioning pin The tape traveling device according to claim (1), wherein at least one of the pins also serves as a positioning hole for positioning the cassette nozzle at a predetermined position a. (7) The first pin and the second pin At least one of the pins has a first positioning surface section that is parallel to the front surface of the cassette half, and the other has a second positioning surface section that is arranged in a direction perpendicular to the front surface of the cassette half. , at least one of the first hole and the second hole has a first positioning edge formed of an edge having a shape corresponding to the tenth ('r'L positioning surface part), and one of the first hole and the second hole has a first positioning edge formed of an edge having a shape corresponding to the tenth The tape traveling device d0 according to claim (6), characterized in that it has a second positioning edge made of details of a shape corresponding to the positioning surface part (8) The first hole is located on the top of the cassette half. one hole formed in a first structure constituting one of the half and the bottom half; and a hole formed in the second structure constituting the other of the top half and the bottom half of the cassette half. 1st
tf K corresponding to the one hole formed in the structure of
and another hole formed in the first structure, the second hole corresponding to the other hole formed in the first structure of the second structure. Claim No. (7), characterized in that the hole is formed at a position where the
Tape running device as described in section.