JPH01137450A - Pinch roller pressure fitting mechanism - Google Patents

Abstract

PURPOSE:To omit the useless operation of a pinch roller and to eliminate the waste of an energy by pressing the pinch roller by advancing a pinch roller press-fitting plate according to the advance of a head plate and holding the pinch roller at its opening position by the position of a changing plate. CONSTITUTION:A pinch roller press-fitting spring 6 is provided on the right and left inch rollers 2F, 2R, which are press-fitted to capstan shafts 3F, 3R via the pinch roller press-fitting spring 6 by the right and left action parts provided on this plate 5 at the pinch roller press-fitting plate 5 advancing time. Regulation parts 4f, 4r are provided at the right and left on a changing plate 4 to regulate the pinch rollers 2F, 2R in the opening direction by engaging with either one part of the pinch roller 2F at the right and left changing position. The wasteful operation of the pinch rollers 2F, 2R is extremely omitted and the waste of energy can thus be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a cassette tape player, and particularly to a mechanism for pressing a pinch roller onto a capstan shaft.

(Conventional technology) With the diversification of audio equipment due to remarkable technological developments in recent years, in addition to the conventional radios and cassette tape players, installation of videotape players and compact disc players is now being considered as in-vehicle equipment. , and its practical application is progressing. While the number of in-vehicle devices is increasing in this way, the installation space for the in-vehicle devices within the vehicle is limited, so there is a strong demand for smaller and simpler devices.

Under these circumstances, miniaturization and simplification of cassette tape players are being pursued, and as a link to this,
Instead of automatically loading a cassette, a configuration has been adopted in which the cassette is set on a reel using a pressing force and only the head is moved back and forth relative to the cassette tape.

With this configuration, there is no need for a drive motor or drive member for autoloading, and there is no need for space for moving the cassette, especially for vertical movement.
The mechanism has been significantly downsized and simplified.

By the way, as a result of the substantial downsizing and simplification of the configuration of this J: Uni by omitting the loading mechanism, the next technical issue is the head shift mechanism that shifts and holds the head plate in the operating position, and the tape running direction. The miniaturization and simplification of the program change mechanism that converts the data and the pinch roller crimping mechanism that crimps the pinch roller to the capstan shaft are attracting attention.

Among these, as a pinch roller mechanism, for example,
There is an invention as shown in No. 8-14353M. As shown in the embodiment, the mechanism of the invention advances a right-reverse lever (pinch roller crimping plate) and rotates it to either the left or right. , the pinch roller on the corresponding side is pressed via a pressure spring to press the pinch roller onto the capstan shaft. Here, the opposite lever (pinch roller crimping plate)
is attached to the drive rod (head plate) on which the head is mounted so that it can swing freely with a pin, and is moved forward by the drive of the drive rod, and the left and right rotation of the right-reverse lever (pinch roller crimping plate) The direction can be changed by the rotating direction of a switching lever provided overlapping the drive rod (head plate).

(Problems to be Solved by the Invention) However, in the above conventional invention, after advancing the opposite lever (pinch roller crimping plate), it is rotated to press one of the pinch rollers, and the same Since the pinch roller on the opposite side is restricted in the separating direction by the opposite lever, there is a problem in that the pinch roller on the separating side is moved more than necessary. These extra movements are energy-wasting and reduce the efficiency of the mechanism.

The present invention was proposed in order to solve the problems of the prior art, and its purpose is to eliminate unnecessary operations of the pinch roller as much as possible, and to improve efficiency so that there is no waste of energy. It is an object of the present invention to provide a pinch roller crimping mechanism with high performance.

[Structure of the Invention] (Means for Solving the Problems) The pinch roller pressure mechanism according to the present invention has two positions: a forward operating position where the head presses against the tape, and a dipping return position where the head separates from the tape. a head plate that moves back and forth between It is characterized in that it is configured to be engaged and moved back and forth according to the back and forth movement of the head plate, and also to be engaged with a change plate and moved left and right.

Pinch roller pressure springs are installed on the left and right pinch rollers, and when the pinch roller pressure plate moves forward, the left and right acting parts provided on this plate press the pinch rollers on the capstan via the pinch roller pressure springs. In addition to being crimped onto the shaft, the change plate is provided with regulating portions on the left and right sides, which engage one of the pinch rollers at the left and right change positions to regulate the pinch roller in the opening direction. .

(Function) In the present invention having the above configuration, the pinch roller pressure bonding plate assumes the right and left positions depending on the change position of the change plate. The pinch roller crimping plate moves forward as the head plate moves forward, and either the left or right acting part presses the pinch roller via the pinch roller crimping spring, and the pinch roller presses against the capstan shaft. Crimp. In this case, the pinch roller on the opposite side is regulated in the separating direction by the regulating portion of the change plate.

As described above, in the present invention, the position of the pinch roller on the non-pressing side in the separating direction is controlled by the change plate that does not engage with the head plate, so there is no problem of unnecessary movement of the pinch roller.

(Example) An example of the pinch roller pressure bonding mechanism according to the present invention as described above will be specifically described with reference to the drawings.

Configuration of this embodiment* Reference numeral 1 in Fig. 1 denotes a head plate that is equipped with a head and moves back and forth between a front operating position where the head presses against the tape and a rear return position where the head separates from the tape. It is. This head plate 1 has forward and reverse pinch rollers 2.
Release portions 1't'' and 1r are provided which engage with the engagement protrusions 2'r' and 2r of F and 2R to release the pinch rollers 2F and 2R from the capstan shafts 3F and 3R.

In addition, 4 in the figure is a change plate that slides left and right to take the left and right change positions, and at the left and right ends of the change plate, in the left and right change positions, the pinch roller cases 2b of the corresponding pinch rollers 2F and 2R, The pinch rollers 2F and 2r engage with the engagement protrusions 2f and 2r provided on the
Left and right regulating protrusions 4t, 4 that regulate 2R in the opening direction
r, and escape recesses 4a, 4a for releasing the pinch rollers 2F, 2R are provided at the center sides of the regulating protrusions 4'r, 4r.

The pinch roller crimping plate 5 can be slid left and right with respect to the head plate 1 by inserting the engagement pins 1a, 1a of the head plate 1 into the left and right slide holes 5a, 5a provided on the left and right sides thereof. It also moves back and forth in accordance with the back and forth movement of the head plate 1. In addition, in the center of the pinch roller crimping plate 5,
An engagement roller 5b is provided, and by being inserted into a slide hole 4b provided in the front-rear direction at the center of the change plate 4, it is possible to slide back and forth with respect to the change plate 5, and also to move the left and right sides of the change plate 4. It moves left and right according to the movement movement.

The pinch roller crimping plate 5 is attached to the capstan shaft 3 by pressing the pinch rollers 2F and 2R on the corresponding side when moving forward.
Forward and reverse pressing projections (acting part > 5f,
5r is provided. Here, the pinch rollers 2F and 2R are suppressed by the pressing protrusions 5f and 5r, and the pinch roller cases 2b and 2b of the respective pinch rollers 2F and 2R have their shafts 2a,
6. Pinch roller pressure spring attached to 2a.
6. In this case, the pinch roller crimping spring 6.6 is installed in a tensioned manner inside the pinch roller cases 2b, 2b, and normally does not apply any rotational moment to the pinch roller casings 2b, 2b. Only when the plate 5 is pressed, this pressing force is applied to the pinch roller case 2b,
It is designed to be communicated to 2b.

The change plate 4 has an engagement roller 7a of a change gear 7 inserted into a second slide hole 4G in the front center thereof, and is moved linearly in the left and right direction in the figure by the rotation of the change gear 7, so that the change plate 4 moves left and right in the figure. It is supposed to take a position.

On the other hand, FIG. 3 is a front view of FIG. 1, and 8 in the figure is a head.

Effects of this embodiment* The effects of this embodiment having the above-described configuration are as follows.

■Stop state...Fig. 1, Fig. 4, Fig. 6 First, in the stop state, as shown in Fig. 1, the head plate 1 is at the rear return position, and the pinch roller crimping plate 5 is also moved backward. Due to the position, the pinch roller 2 can be rotated in the forward or reverse direction.
F, 2R have their engaging protrusions 2f, 2f pressed rearward by release portions if, 1r of the head plate 1, and are held at positions apart from the capstan shafts 3F, 3R. Furthermore, FIG. 4 is an enlarged plan view showing the vicinity of the pinch roller 2F on the positive side that is in the stopped state, and FIG. 6 is an enlarged plan view showing the vicinity of the pinch roller 2F on the opposite side. The crimp plate 5 is omitted, and the engaging protrusion 5f,
Only 5r is shown.

■ Positive side play operation...Figure 1 → Figure 2, Figure 4 → Figure 5, Figure 6 → Figure 7 When a play command is issued in the stop state, the drive structure (not shown) causes the head to move. Plate 1 moves forward. Along with this, the pinch roller pressure bonding plate 5 also moves forward.

In this case, as shown in FIG. 1, when the change plate 4 is in the change position on the right side, the pinch roller pressure bonding plate 5 is also on the right side. It is located at a position overlapping with the projection 2f, that is, at the center of the pinch roller compression spring 6, and the engagement projection 2f of the pinch roller 2F is located at the change plate 4.
As shown in FIGS. 2 and 5, the pinch roller 2F is pressed against the engaging projection 2f by the suppressing projection 5f via the pinch roller compression spring 6, and the change plate 4 without being regulated by
Crimp the capstan shaft 3F.

On the other hand, when the change plate 4 is in the right change position, as shown in FIG. The roller 2R is held at a position slightly apart from the capstan shaft 3R. in this case,
As a result of the pinch roller crimping plate 5 being on the right side, its suppressing protrusion 5r is at a position shifted from the engaging protrusion 2r of the pinch roller 2R, that is, at a position away from the tip end side of the pinch roller crimping spring 6, so that the pinch roller crimping plate 5 is placed on the right side. Spring 6
There will be no pressure on you. Therefore, pinch roller 2 on the opposite side
The pinch roller compression spring 6 of R is simply stretched inside the pinch roller case 2b, and the pinch roller 2R
No unnecessary load is added to the

■ Reverse side play operation Conversely, when the change plate 4 is in the left change position, the pinch roller crimping plate 5 is also on the left side, so the suppressing protrusion 5r on the opposite side
As a result, the pinch roller 2R on the opposite side presses the pinch roller compression spring 6 by the pressing projection 5r, and the engaging projection 2r of the pinch roller 2R becomes the escape portion 4a of the change plate 4. The engagement protrusion 2f is pressed through the capstan shaft 2F, and is pressed onto the capstan shaft 2F.

On the other hand, when the change plate 4 is in the left change position, the engagement protrusion 2f of the positive pinch roller 2F is regulated by the regulating protrusion 4f of the change plate 4, so the pinch roller 2F is moved away from the capstan shaft 3F. It is held at a slightly distant position.

As described above, in this embodiment, when the head plate 1 moves forward, only the pinch roller on the playing side can press the pinch roller pressing spring 6 to press the pinch roller to the capstan, while the pinch roller on the releasing side can press the pinch roller pressing spring 6. No load is applied at all. Therefore, unlike the prior art, there is no problem of unnecessary operation or unnecessary load on the pinch roller on the release side, and the operating efficiency can be improved.

■Step 1 - Tsubu movement...Figure 2 → Figure 1, Figure 5 → Figure 4
FIG. 7→FIG. 6 When a stop command is issued in the play state, the head plate 1 is moved backward by a drive structure (not shown). Along with this, the pinch roller pressure bonding plates 1 to 5 also retreat.

For example, in the case of a stop command from the positive side play state as shown in FIG. As the head plate 1 retreats, the suppression is gradually released, and finally, as shown in FIGS. 1 and 4, the pinch roller case 2a becomes stretched. Therefore, like the known configuration in which the pinch roller is always biased in the crimping direction,
There is no problem that the pressure load of the pinch roller 2F is applied to the pinch roller pressure plate 5, and there is an advantage that the backward load of the head plate 1 is small.

Moreover, the stopping operation from the play state on the opposite side is exactly the same, and as the head plate 1 retreats, the pinch roller pressure bonding spring 6 of the pinch roller 2R on the opposite side gradually releases its pressure, and the pinch roller 2R's pressure is gradually released. No crimping load is applied to the pinch roller crimping plate 5.

*Other Examples* It should be noted that the present invention is not limited to the above-mentioned Examples.
The shapes and engagement configurations of the head plate, change plate, and pinch roller pressure bonding plate can be selected as appropriate.

In other words, the present invention may move the pinch roller pressure bonding plate forward as the head plate moves forward, pressure the pinch roller via a spring, and restrict the pinch roller to the open position using the change plate. , the detailed structure, the drive structure of the head plate, the switching means of the change plate, etc. can be freely selected.

[Effects of the Invention] As explained above, in the present invention, as the head plate moves forward, the pinch roller pressure bonding plate is moved forward to press the pinch roller, and the pinch roller is held in the open position depending on the position of the change plate. Because of this configuration, it is possible to omit wasteful operation of the pinch roller, which was a problem in the prior art, and provide a highly efficient pinch roller crimping mechanism that does not waste energy.

[Brief explanation of the drawing]

1 and 2 are plan views showing an embodiment of the pinch roller crimping mechanism according to the present invention, FIG. 3 is a front view of FIG. 1, and FIGS. 4 and 5 show the vicinity of the pinch roller on the front side. 6 and 7 are enlarged plan views showing the vicinity of the pinch roller on the opposite side, and FIGS. 1, 3, 4, and 6 are in the stopped state, and FIGS. FIGS. 5 and 7 show the play state on the positive side. 1... Head plate, 2F, 2R... Pinch roller, 2a... Shaft, 2b... Pinch roller case, 2
f. 2r...Engagement protrusion, 3F, 3R...Capstan shaft, 4...Change plate, 4a...Escape recess,
4b. 4C...Slide hole, 4f, 4r...Regulating protrusion, 5...Pinch roller pressure bonding plate, 5a...Slide hole, 5b...Engagement roller, 5f, 5r...Press projection , 6... pinch roller pressure spring, 7...
Change gear, 7a... Engagement roller, 8... Head. 114 Figure 5 Figure s6 Figure ○-3R Figure 7

Claims (1)

[Scope of Claims] a. A head plate that includes a head and moves back and forth between a front operating position where the head presses against the tape and a rear return position where the head separates from the tape. b. Change plate that slides left and right to take the left and right change positions. c. A pinch roller crimping plate that engages with the head plate and moves back and forth according to the back and forth movement of the head plate, and also engages with the change plate and moves left and right. d. Left and right acting parts are provided on the pinch roller pressure plate and press the pinch roller pressure springs on the corresponding side when the head plate moves forward. e. A pinch roller crimping spring is attached to the left and right pinch rollers and presses the pinch roller to the capstan shaft when pressed by the pinch roller crimping plate. f. Left and right pinch rollers that are rotatably provided. g. Left and right regulating portions that are provided on the change plate and engage with one of the pinch rollers at the left and right change positions to regulate the pinch roller in the separating direction. A pinch roller crimping mechanism characterized by having the configuration requirements a to g above.