JPH076933U - Selection operation mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention provides a selection operation mechanism for quickly unlocking one operation member by pushing the other operation member. [Structure] The first and second operating members 108, 109 are provided with protrusions 145, 146 having the same shape, respectively, and the protrusions 145a, 146a having one end side orthogonal to the advancing / retracting direction and the other end side have Pressing portions 145b and 146b that are inclined with respect to the advancing / retreating direction and reverse inclined surfaces 145c and 146c are formed between the engaging portions and the pressing portions, and portions 145d and 146d where the sliding contact surface and the reverse inclined surface intersect. Are formed so as to project from the ends 145e and 146e of the engaging portions.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a selection operation mechanism that unlocks one operation member by pushing in the other operation member.

[0002]

[Prior art]

 The tape recorder's fast-forward operation includes a fast-forward operation for fast-forwarding the tape in the same direction as the tape playback direction and a rewind operation for fast-forwarding the tape in the opposite direction to the tape playback direction. To perform these operations, the tape recorder is provided with a fast-forwarding operation member and a rewinding operation member.

In order to avoid abrasion of the magnetic head due to at least sliding contact with the tape running at a high speed, both operating members interlock with a head mounting plate returning mechanism that separates the magnetic head from the tape during the operation. ing. Since the operating force of this head mounting plate return mechanism is relatively heavy and it is difficult to hold the operating member in the operating position against this operating force, a locking mechanism for the operating member is provided to engage both operating members. The stop mechanism locks it in the operating position.

As shown in FIG. 6, the fast-forward locking mechanism of the tape recorder disclosed in Japanese Patent Laid-Open No. 61-24044 has a fast-forward operation member 1 and a rewind operation member 2 which are plate-shaped and press one end. The head mounting plates (not shown) are superposed on each other and are movable back and forth in a direction orthogonal to the reciprocating direction of the head mounting plates. The operation members 1 and 2 are provided with engaging portions 3 of which one end side is orthogonal to the advancing / retreating direction, and locking portions 5 of substantially the same shape, which are pressing portions 4 whose other end side is inclined with respect to the advancing / retreating direction, at side edges. ing. The operating members 1 and 2 are urged to move in the return direction by a return spring (not shown).

On the other hand, the substrate is provided with a locking member 7 which is rotatable and elastically held by a tension spring 6 at a fixed position. This locking member 7 has a locking hole 8 near its tip, and when either one of the above operation members is operated to move forward, the tip is brought into sliding contact with the pressing portion 4 of the one operation member. Rotate. Then, after the locking hole 8 passes through the engaging portion 3 of the one operation member, it is returned by the elastic force of the pulling spring 6. At this time, the locking member 7 locks one of the operating members in the forward position by the locking hole 8 engaging with the engaging portion 3.

To unlock the locked one locking member, the other unlocked operating member is moved forward. Then, the pressing portion 4 of the other operating member slides on the tip of the locking member 7 to rotate the locking member 7, and the engagement portion of the one operating member and the locking hole are disengaged from each other. The locking of the operation member of is released.

[0007]

[Problems to be solved by the device]

 In the above-mentioned fast-forward mechanism, in addition to operating the head mounting plate return mechanism during the operation of the operating member, the reel shaft rotation transmission switching mechanism that switches the rotation of the reel shaft at high speed is operated during the operation, or both operations are performed. Multiple operations are performed, such as switching the running direction of the tape by simultaneously operating the members. However, in the above-described fast-forwarding mechanism, the end of the pressing part 4 of the engaging part 5 and the end of the engaging part 3 have the same height. Therefore, when the locking of one of the operating members that is locked is released, the forward operation amount of the other operating member is adjusted so that the tip of the locking member reaches near the end of the pressing portion 4 of the one operating member. If the forward movement is not performed, the engagement between the engagement portion of one operation member and the locking hole cannot be disengaged.

When an operation member having a function of operating a plurality of operations is unlocked by operating the other operation member, if the forward operation amount of the other operation member is large, another operation is performed by the release operation. May cause you to An object of the selection operation mechanism of the present invention is to enable unlocking of one operation member locked at the operation end position with a short forward operation amount of the other operation member.

[0009]

Means for Solving the Problems The selection operation mechanism of the present invention has a pair of operation members which have an engaging portion and are arranged side by side so as to be movable in the same direction, and these operation members are attached in the backward movement direction. It is movable between the biasing return spring and the position where it can engage with the engaging part of the operating member and the position where it cannot engage, and the pressing part of the operating member moves with the forward movement of one selected operating member. After the pressed part is pushed and moved from the engagement position to the release position, it returns to the engagement position and engages with the engagement part of the operation member to lock the operation member in the predetermined forward movement position. And a locking mechanism for locking. The relationship between the pressing portion provided on each operating member and the pressed portion provided on the locking mechanism is such that when each operating member is in the middle position from the return position to the forward movement position, the engagement of the locking mechanism is performed. The amount of movement from the position to the release position is set to be larger than the predetermined amount for locking each operation member by the locking mechanism in the forward position.

[0010]

[Action]

 When one operating member is locked by the locking mechanism and the other operating member not locked by the locking mechanism is moved forward, the pressing portion of the other operating member presses the pressed portion. Move the locking mechanism. Then, the relationship between the pressing portion and the pressed portion is such that when the operating members are in the middle of returning from the return position to the forward movement position, the amount of movement of the locking mechanism from the engaging position to the releasing position is Since it is set larger than a predetermined amount that locks each operating member by the stop mechanism in the forward movement position, one locking member locked by the locking mechanism is engaged by a short operating amount of the other operating member. It is released from the stop mechanism.

[0011]

【Example】

 FIG. 1 is a plan view showing a mechanical portion of a tape recorder according to the present invention. In the figure, 101 is a substrate of the tape recorder. A magnetic head 102 is mounted on the substrate 101 on a head mounting plate 103 that can move back and forth. Capstans 104 and 204, pinch rollers 105 and 205, and reel shafts 106 and 206 are provided on the left and right of the magnetic head 102, respectively. In this tape recorder, both reel shafts 106 and 206 are loaded with the tape cassette 107 and the head mounting plate 103 is advanced, and in this state, either one of the reel shafts (106 or 206) is rotated in the tape winding direction. Recording or playback can be performed by pressing a pinch roller (105 or 205) onto the capstan (104 or 204) on the same side as this and rotating the capstan. At the upper position of the magnetic head 102, two plate-like operation members (first operation member 108 and second operation member 109), one end of which is a pressing operation end, are overlapped with each other and are orthogonal to the head mounting plate 103. It is mounted so that it can move back and forth in the direction you want.

FIG. 2 shows a state in which these operating members 108 and 109 are attached to the substrate 101. In the figure, 110 and 111 are studs that are erected on the substrate 101 and are used for attaching operation members. A guide plate 112 is fixed to the upper end of one stud 110 in parallel with the substrate 101. This guide plate 112 is bent upward at one end, has a guide hole 114 at the bent portion 113, and has a curved guide hole 115 at the other end as shown in FIG. The portion has a U-shaped guide groove 116 as shown in FIG.

The operation end side of the first operation member 108 is inserted into the guide hole 114, the tip end thereof is guided by the upper end of the stud 111, and the side end thereof is guided by the guide groove 116 so that it can be moved back and forth. It is installed. Further, the second operating member 109 is superposed on the first operating member, the operating end side thereof is inserted into the guide hole 114, the tip end portion thereof is guided by the upper end of the stud 111, and the side portion Is guided by the guide groove 116 and is mounted so as to be movable back and forth.

As shown in FIG. 3, the first operating member 108 has a cam hole 117 formed in the center thereof which overlaps with the guide hole 115 and is larger than the guide hole 115, and has a tip portion which is upwardly moved. A bent direction switching pressing portion 118 is formed. Further, a spring receiving piece 119 is formed in the vicinity of the cam hole 117, and a tongue piece 102 is projected at the tip of the first operating member 108 below the position opposite to the direction switching pressing portion 118. ing. The first operating member 108 is constantly urged toward the operating end by the restoring force of the tension spring 121 that is stretched between the spring receiving piece 119 and the bent portion 113 of the guide plate 112. . On the other hand, in the second operation member 109, a cam hole which can overlap with the cam hole 117 is formed in the central portion, and a spring receiver 123 is formed in the vicinity of the cam hole 122. Further, a direction switching pressing portion 124 is formed on the upper surface of the tip end portion of the second operation member (109). Then, the second operating member 109 is constantly urged toward the operating end by the restoring force of the tension spring 125 hung between the spring receiving piece 123 and the bent portion 113 of the guide plate 112. .

At the upper end of the stud 111, a tape running direction switching member 126 is mounted so as to overlap the second operating member 109. The tape running direction switching member 126 is capable of moving forward in parallel with both operation members by fitting long holes 127 provided in the forward movement direction of both operation members to the stud 111, and using the stud 111 as a fulcrum. It is rotatable. The tape running direction switching member 126 has both edges as inclined surfaces, and these inclined surfaces are positioned in front of the direction switching pressing portions 118, 124 of the first and second operation members 108, 109. There is. An arcuate surface 130 is formed at the front end of the tape running direction switching member with the front end of the long hole 127 as the center of curvature. One end of the transmission member 131 is arranged. This auto-reverse mechanism switches the rotation transmission path of the reel shaft on the tape winding side.

The tape traveling direction switching member 126 functions as follows. When the first operating member 108 is pressed against the tension spring 121, the direction switching piece pressing portion 118 of the operating member 108 presses the left inclined surface to rotate leftward, When the second operating member 109 is pressed against the tension spring 125, the direction switching pressing portion 124 of the operating member 109 pushes the right inclined surface to rotate it to the right. Further, when the first and second operating members are simultaneously pressed, the respective direction switching pressing portions 118 and 124 simultaneously press the respective inclined surfaces to inhibit the rotation, and in this state, the both operating members 108 and 124 are locked. It moves along with the length of the long hole 127 together with 109, and functions to push the operating force transmission member 131 on the arc surface 130.

The cam roller 132 shown in FIG. 3 is inserted into the curved guide hole 115 provided in the guide plate 112 and the cam holes 117 and 122 provided in the first and second operation members 108 and 109. ing. The cam roller 132 is rotatably supported by the rotating member 133. The rotating member 133, together with the pinch arm of the pinch roller 105, is rotatably supported by a shaft erected on the substrate 101. The rotating member 133 is provided with a locking claw 134 that extends in the horizontal direction. The locking claw 134 is always attached to the head mounting plate 103 from the inside with respect to the cut-and-raised piece 135 protruding upward. Facing each other.

Therefore, when the second operation member is pressed, the cam roller 132 is pushed by the cam surface of the cam hole 122 and rolls along the guide hole 115, and as a result, the rotating member 133. And the head mounting plate 103 is retracted from the recording or reproducing state. When the first operating member 108 is pressed, the rotating member 133 also rotates and the head mounting plate 103 retracts.

As shown in FIG. 4, a locking mechanism 140 and a tape operation force transmission member 131 are provided in the vicinity of the tape running direction switching member 126. The locking mechanism 140 includes a locking member 142 pivotally supported by a fixed shaft 141 erected on the substrate 101, and a tension spring 144 that constantly biases the locking member 142 in a counterclockwise direction in FIG. It consists of and. The pressed portion 142a of the locking member 142 extends toward the front end side edges of the first and second operation members 108, 109, and the first and second pressed members 142a are located near the pressed portion 142a. A locking hole 147 for selectively locking the projections 145, 146 formed at the tip of the second operating member is formed.

The protrusions 145 and 146 formed on the side edges of the first and second operation members 108 and 109 have the same shape, and as shown in FIG. 5, an engaging portion 145a whose one end side is orthogonal to the advancing / retreating direction. , 146a, and the other ends become pressing portions 145b, 146b that are inclined with respect to the advancing and retracting direction. Then, the reverse inclined surfaces 145c, 146c are provided between the pressing portions 145b, 146b and the engaging portions 145a, 146a, and the portions 145d, 146d where the reverse inclined surfaces and the pressing portions intersect are formed in the engaging portions 145a, 146a. It is formed so as to project from the end points 145e and 146e.

When the first operation member 108 is moved forward against the tension spring 121, when a certain forward movement position is reached, the engaging portion 145 a is locked in the locking hole 147 as shown in FIG. As a result, the first operating member 108 is held at a constant forward movement position. Similarly, when the second operation member 109 is moved forward against the tension spring 125, the engaging portion 146a is locked in the locking hole 147 when the predetermined forward movement position is reached, whereby the second operation member 109 is locked. The operating member is held at a constant forward movement position.

Note that such holding is performed alternatively. That is, when the second operating member is moved forward while the first operating member 108 is held by the locking member 142, the pressed portion 142a slides on the pressing portion 146b of the second operating member. The locking member 142 is rotated clockwise around the fixed shaft 141. By this rotation, before the pressed portion 142a of the locking member 142 reaches the portion 146d, the engagement between the terminal end 145e at a position lower than the portion 146d and the locking hole 147 is released. Then, the first operating member 108 starts to move back to the original position by the restoring force of the tension spring 121. At this time, the edge of the locking hole 147 of the locking member 142 is in sliding contact with the reverse inclined surface 145c, so that the return of the first operating member is not hindered.

The tape operation force transmission member 131 is rotatably supported together with the pinch arm of the pinch roller 205 on a shaft erected on the substrate 101. The member 131 includes a pressed piece 151 that faces the arc surface 130 of the tape direction switching member 126, a claw-shaped projection piece 152 that contacts the inner surface of the locking member 142, and the first piece. It is composed of a mountain-shaped pressure receiving piece 153 that receives a pressing force by a tongue piece 120 provided on the operating member 108, and pieces 154 and 155 that extend in a forked shape on the upper surface of the substrate 101.

Here, the forward movement of the first operating member 108 and the rotational relationship of the operating force transmission member 131 will be described. When the first operating member 108 is moved forward against the tension spring 121, the tip of the tongue piece 120 pushes the pressure receiving piece 153 to rotate the tape operating force transmitting member 131. Then, the auto reverse mechanism operates to switch the rotation transmission path to the reel shaft. Then, when the first operation member is locked by the locking mechanism, the tip of the tongue piece 120 has crossed over the tip of the crest of the pressure receiving piece 153, and the operation force transmission member 131 has returned to its original position. . When the locking of the first operation member 108 is released and the first operation member 108 is returned, the tip of the tongue piece 120 presses the pressure receiving piece 153 again to rotate the tape operation force transmission member 131. . Then, the auto reverse mechanism is activated again to switch the rotation transmission path to the reel shaft to the original state.

The selection operation mechanism of the present invention is configured as described above, and its operation will be described below. When the first operation member 108 is operated to move forward, the cam hole 117 of the first operation member presses the cam roller 132 to rotate the rotating plate 133. Then, the locking claw 134 presses the cut-and-raised piece 135 of the head mounting plate 103 to move the head mounting plate 103 backward. When the head mounting plate 103 is moved backward, the left and right pinch arms are rotated to separate the pinch rollers 105 and 205 from the corresponding capstans 104 and 204.

When the pinch rollers 105 and 205 are separated from the capstans 104 and 204, the tape sandwiched between the pinch rollers and the capstan is wound at a high speed in a predetermined direction by the rotational force of the reel shaft. As for the rotation of the reel shaft at this time, the tongue piece 120 presses the pressure receiving piece 153 to rotate the operating force transmission member 131, so that the automatic reverse mechanism operates to switch the rotation transmission path of the reel shaft. Therefore, the reel shaft on the side opposite to the reel shaft before the operation of the first operating member 108 rotates. That is, when the first operating member 108 is pressed, a rewinding operation is performed in which the tape is fed at a high speed to the side opposite to the tape running direction during recording or playback. When the first operation member is further moved forward, the cam hole 117 presses the cam roller 132 to further retract the head mounting plate 103. Then, the engaging portion 145a is locked in the locking hole 147 at the forward end, whereby the first operating member 108 is held at the forward end position by the locking mechanism 140, and the tape rewinding operation state is reached. Is set to.

To release the locked state of the first operating member 108 by the locking member 142, the second operating member 109 may be moved forward. When the second operating member 109 is operated to move forward, the pressed portion 142a of the locking member 142 reaches the portion 146d where the reverse inclined surface 146c of the second operating member and the pressing portion 146b intersect. At this time, the locking member 142 is given the maximum amount of rotation, but before the maximum amount of rotation is given, the end 145e of the engaging portion 145a of the first operating member is at a position lower than the position 146d. Therefore, before the pressed portion 142a of the locking member 142 reaches the portion 146d of the second operating member, the engagement between the engaging portion 145a of the first locking member and the locking hole 147 is released. Then, the first operating member returns to the original position by the restoring force of the tension spring 121. In this process, the tongue piece 120 presses the pressure receiving piece 153 again to rotate the operating force transmission member 131 again. The rotation of the operating force transmission member activates the auto-reverse mechanism to switch the reel shaft rotation transmission path, so that the tape running direction is the same direction as before the forward operation of the first operating member 108.

When the second operating member 109 is operated to move forward, the second operating member 109 causes the cam hole 122 to press the cam roller 132 to rotate the rotating plate 133. Then, the locking claw 134 presses the cut-and-raised piece 135 of the head mounting plate 103 to move the head mounting plate 103 backward. With this backward movement, the head mounting plate 103 rotates the left and right pinch arms to separate the pinch rollers 105 and 205 from the corresponding capstans 104 and 204. When the pinch rollers 105 and 205 are separated from the capstans 104 and 204, the tape sandwiched between the pinch rollers and the capstan is wound at high speed in the same direction as when recording or playing by the rotational force of the reel shaft. , The tape fast forward operation is performed.

When the second operation member is further moved forward, the cam hole 122 presses the cam roller 132 to further retract the head mounting plate 103. Then, the engaging portion 146a is locked in the locking hole 147 of the locking member 142 at the forward end, whereby the second operating member 108 is held at the forward end position. At this time, the tape is set to the state of fast-forward operation. In order to release the locked state of the second operating member 109 by the locking member 142, the first operating member 108 can be moved forward to move the second operating member 108 in the same manner as the first operating member. The lock is released.

[0030]

[Effect of device]

 The selection operation mechanism of the present invention relates to the relationship between the pressing portion of the operation member and the pressed portion of the locking mechanism when the operation member is in the middle from the return position to the forward movement position. Since the amount of movement from the set position to the release position is set to be larger than the predetermined amount for locking each operating member by the locking mechanism to the forward movement position, the other operating member not locked by the locking mechanism is short. With the forward movement amount, the locked state of the one operation member locked by the locking mechanism can be quickly released. As described above, the selection operation mechanism of the present invention is excellent in the case where two operation members that perform a plurality of operation switching operations are operated, and the operation state of one operation member releases the locked state of the other operation member. It is possible to exert the effect.

[Brief description of drawings]

FIG. 1 is a plan view showing a tape recorder incorporating a selection operation mechanism of the present invention.

FIG. 2 is a side view of a fast-forwarding operation member and a rewinding operation member.

FIG. 3 is an exploded perspective view of a fast-forwarding operation member and a rewinding operation member.

FIG. 4 is a plan view showing a locking mechanism of the present invention.

FIG. 5 is an enlarged view of an essential part showing an engaging portion of the present invention.

FIG. 6 is a plan view showing a conventional locking mechanism.

[Explanation of symbols]

 145 146 Projection 145a 146a Engagement 145b 146b Pressing 108 Rewinding operating member 109 Fast-forwarding operating member 121 125 Return spring 140 Locking mechanism 142a Pressed part

Claims (2)

[Scope of utility model registration request] 1. A pair of operating members (108, 109) having engaging portions (145a, 146a) and arranged side by side so as to be movable in the same direction, and a return for biasing these operating members in a backward direction. Spring (121,1
25), and is movable between a position engageable with the engaging portion of the operating member and a position not engageable with the pressing portion of the operating member with the forward movement of one selected operating member ( 145b, 146b) to the pressed part (14
2a) is pushed to move from the engagement position to the release position, then returns to the engagement position and engages with the engaging portion of the operation member to engage the operation member at a predetermined forward movement position. A locking mechanism (140) for stopping the locking mechanism by moving one of the operating members in the return position forward to move the locking mechanism from the locking position to the release position by a predetermined amount. In the selection operation mechanism in which the other operation member locked at the predetermined forward position is released from the locking mechanism to be returned, the pressing portion provided in each operation member and the object provided in the locking mechanism. The relationship with the pressing portion is such that when each operation member is in the middle position from the return position to the forward movement position, the movement amount of the locking mechanism from the engagement position to the release position is larger than the predetermined amount. A selection operation mechanism characterized by being set. 2. The pair of operating members are plate-shaped and have protrusions of the same shape which overlap each other on their side portions. Is substantially orthogonal to the reciprocating direction of the engaging portion to form the engaging portion, and between the other end of the operating member on the forward side of each operating member and the apex of the engaging portion, a mountain shape having a highest portion in the middle is formed. The selection operation mechanism according to claim 1, wherein the edge portion of the chevron shape is the pressing portion.