JPH0626034U - Pressing mechanism - Google Patents

Abstract

(57) [Summary] [Object] The present invention aims to provide a pressing mechanism that facilitates assembly work. [Structure] Cassette mounting section 1 of tape cassette mounting apparatus
Is opened and closed by the lid 5, and the lid 5 is locked by the locking member 9 of the locking mechanism 7.
Is locked in the closed position by. The arm 14 is rotatably supported with the upper end engaging portion as a fulcrum, and the eject button 12
Is pressed through the rod 16 to rotate the locking member 9 in the locking release direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pressing mechanism, and relates to a pressing mechanism configured to facilitate mounting and simplify the structure.

[0002]

[Prior art]

 For example, a lid is rotatably attached to a cassette loading portion where a tape cassette such as a tape deck is loaded, and the lid is urged to rotate in the opening direction. It is designed to be locked in. When the eject button is pressed during the eject operation, the locking mechanism releases the locking by the operation of the pressing mechanism.

Therefore, the lid is pivoted in the opening direction and opened by the unlocking operation of the locking mechanism.

The pressing mechanism used in the tape cassette mounting apparatus having the above-described structure uses an arm for pressing the locking mechanism, which is rotatably supported by a shaft and uses a retaining ring. To prevent the arm from coming off. A coil spring is hooked on the arm so that the arm is biased in the direction opposite to the pressing direction.

[0005]

[Problems to be solved by the device]

 However, in the conventional pressing mechanism, the arm is inserted through the shaft, so not only the shaft but also the retaining ring needs to be assembled, which not only increases the number of parts, but also increases the man-hours for the assembly work. Therefore, there is a problem that it is difficult to reduce the manufacturing cost.

Therefore, an object of the present invention is to provide a pressing mechanism that solves the above problems.

[0007]

[Means for Solving the Problems] The present invention presses a pressing operation member that is operated by pressing, a pressed portion that is pressed by the pressing operation member, an engaging portion that engages with a fixed portion, and an operated member. An arm having a pressing portion to be activated, an elastic member for urging the arm toward the pressing operation member and the fixed portion, and a support member having the fixing portion. When the pressed portion is pressed against, the contact portion between the engaging portion and the fixed portion rotates about the rotation fulcrum, and the pressing portion presses the actuated member. Become.

[0008]

[Action]

 Since the arm is rotatably supported in a state where the engaging portion of the arm is in contact with the fixed portion, it is possible to reduce the number of parts and the number of assembling steps.

[0009]

【Example】

 1 to 4 show a tape cassette mounting device to which an embodiment of a pressing mechanism according to the present invention is applied. The lid is removed so that the inside can be seen in FIG.

In each of the drawings, the tape cassette mounting device is provided with reel bases 2a and 2b for winding a tape, a magnetic head 3 and an erasing head 4 in a cassette mounting portion 1, and an opening on the front side thereof is provided in the opening. A lid 5 for opening and closing the cassette mounting portion 1 is rotatably provided. Further, on the bracket 6 on the left side of the cassette mounting portion 1 in FIG. 1, a locking mechanism 7 that locks the lid 5 in the closed position and an ejector that operates the locking mechanism 7 to unlock the lid 5. A pressing mechanism (hereinafter simply referred to as a pressing mechanism) 8 is provided.

The locking mechanism 7 includes a locking member 9 that locks the pin 5b protruding from the side surface 5a of the lid 5, and a coil spring 10 that biases the locking member 9 to rotate counterclockwise (direction A). Become. The locking member 9 is supported by the shaft 6a of the bracket 6, and has a claw portion 9a that projects forward and engages with the pin 5b of the lid 5, and a contact portion 9b that projects laterally on the rear side.

The lid 5 is urged to rotate in the opening direction by a torsion spring (not shown), and is held at the closed position when the locking member 9 locks the pin 5b.

The eject pressing mechanism 8 forming the essential part of the present invention includes an eject button (pressing member) 12 provided on a front panel 11 and an arm rotatably supported by a bracket (supporting member) 13. 14 and a coil spring (elastic member) 15 that biases the arm 14. Thus, the reason why the arm 14 is required is that the locking member 9 is separated from the eject button 12.

The eject button 12 is slidably inserted into a recess 11 a provided in the front panel 11, and a tip portion thereof projects forward from the front panel 11. Further, a rod 16 penetrating the wall 11b of the recess 11a is embedded in the eject button 12, and a retaining ring 17 for preventing removal is fitted to the rod 16. Also, a coil spring 18 for return is interposed between the eject button 12 and the wall 11b, and the eject button 12 is normally displaced in the C direction.

The arm 14 is made by pressing a sheet metal into the shape shown in FIG. 5, and has a first bent portion 14b and a second bent portion 14c that are bent on both sides of the flat plate portion 14a. . The first bent portion 14b has an R-shaped engaging portion 14d protruding at the upper end, and has a pressing portion 14e for pressing the locking member 9 as a pressed member at the lower end. Further, the second bent portion 14b has an R-shaped engaging portion 14f protruding to the upper end similarly to the first bent portion 14b. Further, a latching portion 14g for latching one end of the coil spring 15 projects at the center of the upper end of the flat plate portion 14a.

As shown in FIG. 6, the arm 14 having the above-described structure causes the hooking portion 14g to hook one end of the coil vane 15 so that the upper opening 13a of the bracket 13 has a pair of engaging portions 14d and 14f. It is inserted from the front side and brought into contact with the rear surface (fixed portion) 13b of the bracket 13.

At this time, since the other end of the coil spring 15 is hooked on the hooking portion 13c on the front surface side of the bracket 13, the engaging portions 14d and 14f are urged by the pulling force of the spring 19 to the front side. It is pressed against the rear surface 13b. Therefore, as shown in FIG. 6, the arm 14 is supported with the engaging portions 14d and 14f as pivotal fulcrums.

Next, the arm 14 is rotated in the E direction. Then, as shown in FIGS. 7 to 9, the pressing portion 14 e protruding rearward from the lower end of the arm 14 is inserted into the lower opening 13 d of the bracket 13.

Further, when the eject button 12 is inserted into the recess 11a and the rod 16 is locked by the retaining ring 17, the arm 14 is pressed against the rod 16 and the rear surface 13b of the bracket 13 as shown in FIG. Held in.

Therefore, when assembling the pressing mechanism 8, it is not necessary to insert the arm 14 into the shaft and fit the retaining ring into the shaft, and the number of parts is reduced accordingly and the coil spring 19 is engaged as described above. After inserting the engaging parts 14d and 14f of the stopped arm into the upper opening 13a of the bracket 13, the pressing member 13d is simply inserted into the lower opening 13d, so that it can be easily mounted and the number of assembling steps can be reduced. Has been done.

The pressing portion 14e of the arm 14 attached in this manner abuts the abutting portion 9b of the locking member 9 of the locking mechanism 7.

Therefore, when the eject button 12 is pressed in the D direction during the eject operation, the rod 16 presses the flat plate portion 14a of the arm 14 in the same direction. Therefore, the arm 14 rotates in the E direction with the pair of engaging portions 14d and 14f provided at the upper end as pivotal fulcrums, and the pressing portion 14e presses the contact portion 9b of the locking member 9.

Therefore, the locking member 9 rotates in the B direction around the shaft 6a in FIG. 3 to release the locking of the pin 5a of the lid 5 by the claw portion 9a. As a result, the lid 5 rotates in the opening direction to open the lid.

In the above embodiment, the tape cassette loading device has been described as an example, but the present invention is not limited to this, and it is of course applicable to a device configured to press a mechanism other than the locking mechanism. Is.

[0025]

[Effect of device]

 As described above, the pressing mechanism according to the present invention can rotatably support the arm with the engaging portion of the arm in contact with the fixed portion. Since it is unnecessary, the number of parts can be reduced, and the man-hours for assembling work can be reduced. Therefore, it has an advantage that it can be easily assembled in a short time and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of a tape cassette loading device to which an embodiment of a pressing mechanism according to the present invention is applied.

FIG. 2 is a cross-sectional view of the tape cassette mounting device.

FIG. 3 is a vertical sectional view showing a locking mechanism.

FIG. 4 is a vertical sectional view showing a pressing mechanism.

FIG. 5 is a diagram showing an arm of a pressing mechanism.

FIG. 6 is a vertical cross-sectional view showing a method of mounting the arm.

FIG. 7 is a vertical cross-sectional view showing a completed assembly state of the pressing mechanism.

FIG. 8 is a front view showing the attachment of the arm.

FIG. 9 is a plan view showing attachment of an arm.

FIG. 10 is a vertical sectional view showing an eject operation.

[Explanation of symbols]

 1 Cassette Mounting Part 3 Magnetic Head 5 Lid 7 Locking Mechanism 8 Pushing Mechanism 9 Locking Member 11 Front Panel 12 Eject Button 13 Bracket 14 Arm 15 Coil Spring 16 Rod

Claims (1)

[Scope of utility model registration request] 1. A pressing operation member that is pressed, a pressed portion that is pressed by the pressing operation member, an engagement portion that engages with a fixed portion, and a pressing portion that presses and operates the operated member. An arm, an elastic member for urging the arm toward the pressing operation member and the fixed portion side, and a support member having the fixed portion, wherein the arm resists the elastic member and pushes the pressed portion. The pressing mechanism is configured such that when the pressing part is pressed, the contact part between the engaging part and the fixed part is rotated about a rotation fulcrum, and the pressing part presses the actuated member.