JPS632189A - Conduction mechanism for door part in cassette player or the like - Google Patents

Abstract

PURPOSE:To surely prevent damage to electronic comonents by contacting and conducting a support shaft of an opening/closing door to a chassis or the like via a spring restoring the door. CONSTITUTION:One end 6a of the spring 6 for restoring the opening/closing door is prolonged and its tip is in contact with an upper plate rear face 2a of the chassis 2. Thus, when a cassette A is brought into contact with the door 4 and further pushed, the static electricity charged on a human body is discharged to the support shaft 5 of the door close to the human body than the printed circuit board 8 and grounded to the chassis 2 through the spring 6 in contact with the support shaft 5. Thus, the electronic components on the printed circuit board are protected from electrostatic destruction.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is designed to prevent static electricity charged on the human body from entering the electric circuit during operation of a cassette player, etc., in which an opening for inserting and removing a cassette is provided with an opening/closing door. The present invention relates to a conduction mechanism that prevents electrical conduction.

(Prior art) Figures 3 and 4 show this conventional volatile conduction mechanism.
In the figure, l is a panel fitted to the front end of the chassis 2, and an opening 3 through which the cassette A is inserted and removed is formed in the center of the front surface. -14 is an opening/closing door disposed inside the opening 3, the top end of which is supported by a spindle 5 so that it can be opened and closed; A spring 6 is attached to restore and maintain the closed position. Reference numeral 7 denotes a grounding plate attached along the inner lower surface of the panel 1, the top end of which is located at the lower edge of the opening 3 and in contact with the opening/closing n4. In addition,
8 in the figure is a printed circuit board with electronic components such as a microcomputer attached.
9 is Detsuki's cassette holder.

The conventional device is constructed as described above, and when the cassette A is opened/closed as shown in FIG. This is to protect the electronic components inside the printed circuit board 8 from electrostatic damage.

[The ode that the invention attempts to solve]

In the conventional conduction @disconnection as described above, a grounding plate 7 is specially provided along the inner wall surface of the panel 1, which causes a problem in that the structure becomes more complicated and the cost increases.

This invention was made to solve this problem, and aims not only to ensure that static electricity is removed by 1 cT at the opening/closing door, but also to provide a simple conduction mechanism that eliminates specific grounding parts. do.

[Means for solving problems]

[σ] The conduction mechanism of the door according to the invention connects the spindle of the opening/closing door to
The door is brought into contact with the chassis, etc. via a spring that returns the door to its original position.

[Effect]

In this invention, the static electricity charged on the human body falls through the door return spring attached to the pivot of the opening/closing door to the grounding part of the chassis, etc., thereby reliably preventing damage to electronic components.

〔Example〕

1 and 2 (9) are cross-sectional views showing one embodiment of the present invention, in which the parts indicated by numerals 1 to 9 except for the ground plate 7 are completely the same as the conventional one described above. By the way, in this embodiment, the spring 6 for returning the opening/closing door is
One end 6a is long and its tip is in contact with the back surface 2a of the upper plate of the chassis 2.

In the above-mentioned structure, when the cassette A is brought into contact with the opening/closing door 4 and is further pushed in, the static electricity charged on the human body is discharged from the printed circuit board 8 to the support shaft 5 of the door, which is closer to the human body.
This is dropped onto the chassis 2 through a spring 5 that contacts a support shaft 5. Therefore, the electronic components within the printed circuit board 8 are protected from electrostatic damage. Note that the spring 5 needs to be manufactured using a conductive material or subjected to surface treatment to enable conduction.

Furthermore, although the above embodiment shows the case where the present invention is implemented in a cassette tape deck, it is also possible to implement the invention in a video deck, compact disc, etc., and the same effects can be obtained. Moreover, it is even more effective if the opening/closing door 4 is made of metal.

〔Effect of the invention〕

As explained above, this invention can reliably protect electronic components with a simple 72 structure in which the support shaft of the rabbit is brought into contact with the chassis etc. via a spring, and also eliminates the need for a specific grounding plate unlike the conventional one. Therefore, not only the structure but also the manufacturing and assembly are significantly simplified and the cost is significantly reduced.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention in the Wtr plane, and FIG. 2 shows the state when the cassette is inserted in FIG. 1! FIG. 8 is a cross-sectional view showing the conventional mechanism, and FIG. 4 is a cross-sectional view showing the state of FIG. 3 when the cassette is inserted. In the figure, 1 is a panel, 2 is a chassis, 3 is an opening,
4 is an opening/closing door, 5 is a support shaft, and 6 is a spring. In addition, the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] An opening for inserting and removing a cassette is formed on the front surface of the panel, and an opening/closing door is provided inside the opening, characterized in that the support shaft of the door is brought into contact with the chassis, etc. via a spring that returns the door. A conduction mechanism for the door of a cassette player, etc.