JPH0240595Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a mounting device for an erroneous erasure prevention switch that detects the presence or absence of an erroneous erasure prevention claw provided on a tape cassette.

(B) Prior Art Conventionally, as a mounting mechanism for an accidental erasure prevention switch that detects the presence or absence of an accidental erasure prevention claw provided on a tape cassette, for example, Utility Model Application No. 115753/1983 has been proposed, The accidental erasure prevention switch has been attached to the chassis on which the tape cassette is placed by using a mounting tool such as a screw that is independent of the switch.

Furthermore, by attaching an erroneous erasure prevention switch to the stage that moves the tape cassette to a recordable position, it is possible to detect the presence or absence of an erroneous erasure prevention claw.

(c) Problems to be solved by the invention However, in the former case, screws and other fittings are used to attach the accidental erasure prevention switch and the chassis, which increases costs due to an increase in the number of parts and reduces work efficiency. There was a problem.

In the latter case, even if the accidental erasure prevention switch is attached to the stage using a mounting mechanism that is integrated with the accidental erasure prevention switch without using screws or other attachments, the stage can still be moved. Lead wires soldered to accidental erasure prevention switches must be placed around the stage, which obstructs the movement of the stage and requires that the tape cassette be placed in a fixed position on the chassis. Moreover, since it is difficult to achieve positional accuracy when the chassis and stage unit are combined, there are problems such as when an erroneous erasure prevention switch is attached to the stage, a good erroneous erasure prevention operation may not be performed. Ta.

(d) Means for solving the problem The present invention was made in order to solve the above-mentioned problem, and the present invention displaces depending on the presence or absence of an accidental erasure prevention claw provided on the tape cassette, an erroneous erasure prevention switch that detects whether or not information can be recorded; and an erroneous erasure prevention switch that is provided integrally with the erroneous erasure prevention switch and is attached to the chassis on which the tape cassette is placed, and that is arranged above, below, front and back of the erroneous erasure prevention switch with respect to the chassis. This is a mounting device for an erroneous erasure prevention switch, which includes a position regulating section that regulates movement in the left and right directions.

(e) Effect: According to the mounting device for the accidental erasure prevention switch of the present invention, the movement of the accidental erasure prevention switch up and down, front and back, and left and right is restricted by simply attaching the position regulating part to the chassis, resulting in good accidental erasure prevention. An action is taken.

(f) Examples The details of the present invention will be explained in detail with reference to illustrated examples.

Figures 1 to 5 are drawings relating to the installation device for the accidental erasure prevention switch of the present invention. Figure 1 is a front view of one embodiment, and Figure 2 is the state of the embodiment before it is installed on the chassis. Exploded perspective view showing 3rd
The figure is a side view showing one embodiment attached to a chassis, Figure 4 is a perspective view of one embodiment used in a video tape recorder, and Figure 5 is another embodiment attached to a chassis. FIG.

To explain the drawing numbers and configurations of FIGS. 1 to 5, 1 has a notch 2, a notch 3 having tapers 3a and 3b, and a protruding piece 4, and a video cylinder 5.
and a chassis 8 on which the reel stands 6 and 7 are placed have an erroneous erasure prevention claw 8a, and a tape cassette 9 placed on the reel stands 6 and 7 is pressed by the erroneous erasure prevention claw 8a. The leaf switch 12 includes a pressed piece 10, an arm 11 connected to the pressed piece 10, a fixed contact 12a provided in the arm 11, and a movable contact 12b connected to the arm 11. Erroneous erasure prevention switch, 13, clamping parts 14a, 14b, said clamping parts 14a, 14b
a position regulating part 17 for regulating the movement of the accidental erasure prevention switch 9 in the vertical, longitudinal, and horizontal directions, the part having a small protruding piece 15 and a locking piece 16 provided therein;
is an L-shaped extension extending from the position regulating part 13, and is connected to the fixed contact 12a and the movable contact 1.
2b is provided to pass through the extension part 17, and from this, the accidental erasure prevention switch 9 and the position regulating part 1
3 are made in one piece. Further, reference numeral 18 denotes a position regulating portion comprising a clamping portion 19 for clamping the chassis 1, a small protrusion 20 provided within the clamping portion 19, and a locking piece 21. It is assumed that the position regulating parts 13 and 18 are made of an elastic material, and one end of the leaf switch 12 consisting of the fixed contact 12a and the movable contact 12b is connected to a control circuit (not shown) that controls execution and stop of the recording mode. ).

Below, Figures 1 to 3 are shown as an embodiment of the present invention.
The installation method will be explained with reference to the figure. First, both ends 22a and 22b of the notch 3 provided in the chassis 1 are inserted into the clamping parts 14a and 14b so that both ends 22a and 22b of the notch 3 are clamped by the clamping parts 14a and 14b. At this time, since the notch 3 is provided with tapers 3a and 3b, the insertion is facilitated, and the bottom 23 inside the clamping portions 14a and 14b comes into contact with the bottom 24 of the notch 3 to prevent accidental erasure. switch 9
movement in the front-back direction is restricted. Also, clamp 14
The small protrusions 15 provided inside a and 14b come into pressure contact with the opposing surfaces 25a and 25b of the notch 3, and the movement of the erroneous erasure prevention switch 9 in the left and right direction is also reliably restricted. Furthermore, the bottom portion 23 inside the clamping portions 14a, 14b
At the same time when the bottom part 24 of the notch 3 comes into contact with the bottom part 24 of the notch 3, the latch piece 16 that slides on the surface of the chassis 1 due to its elasticity will latch onto the protruding piece 4 of the chassis 1, and this will cause the upper and lower parts of the accidental erasure prevention switch 9 to be moved. Movement in this direction is also restricted.

Therefore, the erroneous erasure prevention switch 9 can be mounted accurately to the chassis 1 without any play, and
As shown in FIG. 4, the presence or absence of the erroneous erasure prevention claw 8a of the tape cassette 8 placed on the reel stands 6, 7 is reliably detected. To be more specific, when the tape cassette 8 is provided with the accidental erasure prevention claw 8a, the pressed piece 10 is pressed by the accidental erasure prevention claw 8a, the movable contact 12b and the fixed contact 12a come into contact, and the leaf switch is activated. 12 is turned on and a control signal output from the control circuit enables execution of the recording mode. Furthermore, if the tape cassette 8 is not provided with the accidental erasure prevention claw 8a, the movable contact 12b and the fixed contact 12a do not come into contact with each other because there is no pressing member against the pressed member 10, and the leaf switch 12
A control signal output from the control circuit when the switch is off makes it impossible to execute the recording mode.

Next, a method of attaching another embodiment shown in FIG. 5 will be explained. First, the chassis 1 is inserted into the clamping part 19 so that the chassis 1 is clamped by the clamping part 19.
At this time, the small projecting piece 20 is provided to sufficiently hold the chassis 1, and thereby restricts the movement of the accidental erasure prevention switch 9 in the front-back and left-right directions. Also, the upper part of the chassis 1 and the clamping part 1
At the same time that the upper part of the switch 9 comes into contact with the upper part of the switch 9, the latch piece 21 that has slid on the surface of the chassis 1 due to its elasticity is engaged with the lower part of the chassis 1, thereby restricting the vertical movement of the accidental erasure prevention switch 9. The operation of the erroneous erasure prevention switch 9 is the same as described above.

(g) Effects of the invention According to the mounting device for the accidental erasure prevention switch of the present invention, by simply attaching the position regulating part that is integrated with the accidental erasure prevention switch to the chassis, the accidental erasure prevention switch can be moved up and down, front and back, and in relation to the chassis. Movement in the left and right direction is reliably regulated, and the accidental erasure prevention switch can be mounted accurately on the chassis without interfering with surrounding mechanisms, which reduces the number of parts, lowers costs, and further improves work efficiency. Benefits such as improved performance can be obtained.

[Brief explanation of the drawing]

Figures 1 to 5 are drawings related to the installation device for the accidental erasure prevention switch of the present invention. Figure 1 is a front view of one embodiment, and Figure 2 is the state of the embodiment before it is installed on the chassis. Exploded perspective view showing 3rd
The figure is a side view showing one embodiment attached to a chassis, FIG. 4 is a perspective view of one embodiment used in a video tape recorder, and FIG. 5 is another embodiment attached to a chassis. FIG. 1... Chassis, 8... Tape cassette, 8a
... Accidental erasure prevention claw, 9... Accidental erasure prevention switch,
13, 18...Position regulation section.

Claims (1)

[Scope of utility model registration request] an erroneous erasure prevention switch that is displaced depending on the presence or absence of an erroneous erasure prevention claw provided on the tape cassette, and detects whether or not information can be recorded on the tape cassette;
a position regulating section that is provided integrally with the accidental erasure prevention switch and is attached to the chassis on which the tape cassette is placed, and that restricts movement of the accidental erasure prevention switch in the vertical, longitudinal, and horizontal directions with respect to the chassis; A mounting device for an accidental erasure prevention switch, characterized by: