JPH0314549Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> This invention relates to a lock mechanism that uses a lock lever to lock a movable member in a blocked state, such as a cassette lid lock.

<Prior Art> An example in which a conventional locking mechanism is applied to locking a cassette lid will be described below. In FIG. 1, 1 is a lock lever, and 2 is an operating lever. Both levers 1 and 2 are rotatably supported by pins 4 and 5 with respect to a mounting body 3 such as a cabinet, respectively. Further, the proximal end of the lock lever 1 and the distal end of the operating lever 2 are connected by a rotating connecting pin 6. Reference numeral 7 denotes a cassette lid constituting a movable member, and has a lock pawl receiving part 9 like a hole into which a hook-shaped lock pawl 8 formed at the tip of the lock lever 1 is locked. Reference numeral 10 denotes a hook portion formed on the base end side of the operating lever 2 for unlocking operation. Reference numeral 11 denotes a spring member disposed across both the levers 1 and 2, which applies a spring force to the lock lever 1 in the locking direction (direction of arrow a). Reference numeral 12 denotes a stopper wall that restricts the movable range of the lock lever 1 in the locking direction.

The interrelationship between the shield levers 1 and 2 and the cassette lid 7 is as follows. Now, the cassette lid 7 is
When the cassette lid 7 is in the closed position shown in FIG. 8 has a spring force applied in the locking direction, so
The cassette lid 7 is held locked in the closed position.

Next, insert the hook portion 10 of the operating lever into the position indicated by the arrow b through the cassette eject knob (not shown).
When pressed in this direction, the movable connecting portions of both levers 1 and 2 are displaced downward in FIG. Therefore, the lock lever 1 is rotated counterclockwise about the pin 4. In other words, the lock pawl 8 is displaced in the direction of arrow b as shown in FIG.

The conventional lock mechanism is constructed as described above, but the lock lever 1 and the operating lever 2 are attached to the mounting body 3.
After the levers are pivoted, a spring member 11 for maintaining the locked state must be installed across both levers 1 and 2, which not only complicates the assembly work, but also requires a means for stopping the levers together with the spring member 11. Since they must be prepared separately, the number of parts increases, leading to an increase in production costs.

<Purpose of the invention> This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology, and aims to provide a locking mechanism with a simple structure and an inexpensive structure that facilitates assembly and manufacturing.

<Structure of the invention> This invention is based on a lock mechanism that applies a spring force for maintaining a locked state to a lock lever 1 which is rotatably supported on a mounting body 3 and releasably locks the movement of a movable member 7. , a rib 31 that can be elastically deformed in the locking and releasing directions is provided, and the rib 31 is integrally molded with the mounting body 3 via a cantilevered piece 32, and the spring force biasing means is provided with the rib 31. It is composed of

<Embodiment> FIG. 3 shows an example of a locking mechanism according to this invention, and the same or corresponding parts as in FIGS. 1 and 2 are given the same reference numerals, and the explanation thereof will be omitted. In the figure, reference numeral 31 denotes a rib that extends in a direction substantially perpendicular to the locking and releasing directions of the lock claw 8 and is configured to be elastically deformable in the locking and releasing directions, as shown in FIGS. 4 and 5. It is integrally formed with the mounting body 3 via a proximal cantilevered piece 32 . The tip side of this rib 31 is elastically deformed around the cantilever piece 32 to the extent that the lock lever 1 is biased with the minimum spring force necessary to maintain the locked state, and is elastically deformed to the rear surface of the tip side of the lever 1. are in contact. In other words, this rib 31 constitutes a biasing means for the spring force for maintaining the locked state. Reference numeral 33 denotes a punching hole formed in the mounting body 3 during molding of the rib 31, and numeral 34 denotes a decorative plate that also serves as a cover for the punching hole 33.

In the above configuration, the hook portion 1 of the operating lever 2
0 through the eject knob in the direction of arrow b, the lock lever 1 is rotated counterclockwise around the pin 4, and the lock pawl 8 is displaced in the direction of arrow b, so that the cassette lid 7 is locked. It will be canceled. As the lock lever 1 is rotated, the rib 31 is elastically deformed as shown in FIG.

When the pressing operation on the hook portion 10 of the operation lever 2 is released, the lock lever 1 is returned to the position shown in FIG. 3 by the elastic restoring force of the rib 31.

Here, since the means for applying a spring force to the lock lever 1 to maintain the locked state is constituted by the rib 31 integrally formed on the mounting body 3, the conventional spring member is not required, and the number of parts is reduced, making management easier. In addition, since there is no need to assemble the spring member, productivity is improved and manufacturing costs can be reduced. Of course, since the ribs 31 do not wobble due to repeated use, they can fulfill their role as biasing means for the spring force over a long period of time.

Incidentally, although the above embodiment has been described for locking the cassette lid 7, it goes without saying that the present invention can also be applied to locking other movable members. Further, the present invention is not limited to the combination of the lock lever 1 and the operating lever 2, and the operating lever 2 may be configured at the proximal end of the lock lever 1, for example. Furthermore, the arrangement position of the rib 31 is also determined in the direction in which the locked state is maintained (lock direction).
As long as a spring force is generated, it can be changed as shown in FIG. 7, for example, and it goes without saying that it can also be changed as appropriate depending on the formation position of the lock pawl 8, etc.

<Effects of the invention> As described above, this invention provides a means for applying a spring force to the lock lever to maintain the locked state.
Since it is composed of elastically deformable ribs that are integrally formed on the lock lever mounting body, the number of parts can be reduced, making assembly and manufacturing easier, thereby contributing to lower production costs. .

[Brief explanation of the drawing]

Figure 1 is a front view showing a conventional locking mechanism applied to locking a cassette lid, Figures 2A and B are explanatory diagrams of the operation of the mechanism shown in Figure 1, and Figure 3 shows an example of the locking mechanism according to this invention. Front view, Figures 4 and 5
The figures are a sectional view and a sectional view taken along the line - of Fig. 3, respectively.
A line sectional view, FIG. 6 is an explanatory diagram of the operation at the time of unlocking, and FIG. 7 is an explanatory diagram of a modification of the lock lever and the rib arrangement position. DESCRIPTION OF SYMBOLS 1... Lock lever, 3... Mounting body, 7... Movable member, 31... Rib (spring force biasing means), 32
...Cantilever piece.

Claims (1)

[Claims for Utility Model Registration] A lock lever 1 rotatably supported on a mounting body 3 to releasably lock the movement of a movable member 7,
In the locking mechanism that applies a spring force for maintaining the locked state, a rib 31 that can be elastically deformed in the locking and unlocking directions is provided, and the rib 31 is integrally attached to the mounting body 3 via a cantilevered piece 32. Form into
A locking device characterized in that the spring force biasing means is constituted by the rib 31.