JPS6215410Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a locking device.

This type of locking device has a hole in one member, a slide in the other member, and locks the two members by moving the slide and engaging the hole. For example, it is widely used for temporary locks on the doors of cases housing electrical and electronic devices. FIG. 1 shows an example of such a locking device. Slide a is freely suspended in cylinder member b. The cylinder member is provided with an opening c having a length corresponding to a predetermined travel distance of the slide, and a protrusion d integrally formed with the slide is fitted into this opening.
A member d having a hole e is fixed to a case of an electrical/electronic device or the like. The cylinder member is fixed to the door of the case, and the door can be locked by fitting the tip of the slide into the hole of member f. Furthermore, a coil spring g is disposed between the slide and the cylinder member and is always projected from the cylinder member of the slide,
This allows for easy locking and prevents inadvertent release.

The present invention relates to the improvement of such a locking device.
Its purpose is to allow lock and release operations to be performed more easily.

Hereinafter, one embodiment of the locking device of the present invention will be described as a second embodiment.
This will be explained with reference to FIGS. 6 to 6.

In FIGS. 2 to 4, 11 indicates a cylinder member, and 12 indicates a slide. The cylinder member is composed of an upper plate 13 and a lower plate 14. The lower plate is formed with a generally channel-shaped cross section. The upper plate is placed over the lower plate so as to close the groove 14A thereof, and is connected to the lower plate by machine screws 15. Further, the upper plate is provided with through holes 16 corresponding to the grooves in the lower plate. The slide is housed in a tunnel formed by the groove of the lower plate and the upper plate such that a projection 17 integrally formed thereon projects from the through hole. The through hole is arranged such that when the slide is moved so that the protrusion 17 abuts the edge 18 of the through hole, the tip of the slide protrudes from the cylinder member and the protrusion abuts the edge 19 of the through hole. The length is set so that the tip of the slide is drawn into the cylinder member when the slide is moved.

This locking device further includes a second protrusion 21.
is provided on the slide. This protrusion has a height approximately equal to the thickness of the upper plate in which the through hole 16 is formed, and when the tip of the slide is drawn into the cylinder member, it slides so as to come into contact with the edge 8 of the through hole. is placed on top. A coil spring 22 is disposed between the slide and the cylinder member.
That is, the slide is provided with a groove 23, the lower plate of the cylinder member is provided with a bent piece 24 on the end face of the groove, and the coil spring is arranged so as to be located between the end face of the groove and the bent piece. There is. A block 25 is arranged between the coil spring and the folding piece. This coil spring is located offset from the central axis of the slide. More specifically, the coil spring is placed near the groove in the lower plate. The groove of the lower plate is given a depth to form a gap between the groove and the upper surface of the slide of the upper plate.

This locking device can be operated by pulling the protrusion 17 with a finger so that the protrusion 17 comes into contact with the opposite edge 19 of the through hole 16 when the slide shown in FIGS. 2 and 3 is in the protruding state. The second protrusion 21 engages with the edge 18 of the through hole 16, and the tip of the slide is stopped in a state drawn into the cylinder member 11. That is, the slide 12 is connected to the cylinder member 1.
1 and the protrusion 21 is moved into the through hole 16, the coil spring 22 is offset with respect to the central axis of the slide as described above, and a gap is formed between the upper plate and the slide. ,
Since the slide generates a clockwise moment about the point of contact between the protrusion 21 and the edge 18 of the through hole 16 in FIG. 3, the protrusion 21 can be engaged with the edge of the through hole 16. Regarding the lock,
By lightly pressing the protrusion 17 with a finger, the protrusion 21 is disengaged from the edge 18 of the through hole 16, and the slide is pressed by the spring force of the coil spring 22, allowing the tip of the slide to protrude from the cylinder member. At this time, the protrusion 17 is connected to the edge 18 of the through hole 16.
The protrusion length of the slide is set by contacting the slider.

The locking device according to the present invention can maintain the state in which the tip of the slide is retracted into the cylinder member as described above, and the slide can be pushed out simply by pressing the protrusion, so the locking device can be used freely. This is especially useful when you cannot use it. FIG. 5 shows the use of this device for locking the core of a collimator in a scintillation camera. In this scintillation camera, the porous collimator and the pinhole collimator are each attached to and detached from the radiation detector using bolts, but the porous collimator leaves its housing 31 attached to the radiation detector. , only the core 32 can be replaced with a core having a different number of holes.

The core has a disc-shaped main body part 33 and an ear part 34 provided on the circumferential surface of the main body part, and although not shown, a small hole 37', which is a passage for gamma rays, is provided in the main body part. There is. On the other hand, the housing has a hole 35 that fits into the main body of the core and a notch 36 into which the ear fits.
and is provided. After the core is fitted into the housing, the core is rotated as a whole and a portion of the ear portion is fitted into the groove 37 connected to the notch, so that the core is supported by the housing. A locking device according to the invention is provided in the housing to prevent rotation of the core in this collimator. A locking device, generally designated 41, is provided around each notch in the housing. FIG. 6 shows details around the locking device. A groove 14A is provided in the housing, and the upper plate 13 is screwed to the housing so as to cover this groove. In other words, the housing constitutes a part of the cylinder member. Slide 12
is housed inside the groove 14A, and its protrusions 17 and 21 engage with the through holes 16 in the top plate. The coil spring 22 is housed in a groove formed in the slide, and its both ends are connected to the end face of this groove and the groove 42.
is in contact with the end face of The coil spring is then offset with respect to the central axis of the slide, allowing the slide to develop a moment about the point of contact between the projection 21 and the edge 18.

After the core has been mated and supported in the housing as described above, by lightly pressing the protrusion 17 of the locking device 41, the slide 17 is ejected by the coil spring, and this protrusion is brought into contact with the end face of the ear 34. 34A to prevent rotation of the core. Further, when replacing the core with another core, by pulling the protrusion 17 of the locking device 41, the protrusion 21 comes into contact with the edge 18 of the through hole 16, and the slide 12 remains retracted. Therefore, the core can be removed from the housing while supporting it with both hands, making it extremely safe.

As in the embodiments described above, the locking device of the present invention has a protrusion that engages with the cylinder member when the slide is drawn into the cylinder member,
A coil spring is offset from the central axis of the slide and disposed between the slide and the cylinder member to create a moment on the slide about the point of engagement between the protrusion of the slide and the cylinder member, thereby causing the slide to move toward the cylinder member. The slide can be stopped at the retracted position, and the slide can be pushed out with just a light push, so locking and releasing can be done easily.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the structure of a known locking device. 2 to 6 show an embodiment of the locking device of the present invention, FIG. 2 is a perspective view, FIG. 3 is a sectional view taken along the line of FIG. 2, and FIG. 4 is an exploded perspective view. It is. 5 and 6 show an example of the state of use, with FIG. 5 being a bottom view of the collimator of the scintillation camera, and FIG. 6 being a perspective view showing the structure around the locking device. 11...Cylinder member, 12...Slide, 1
6...Through hole, 17...Protrusion, 18...Edge, 21
...Second protrusion, 22...Coil spring.

Claims (1)

[Scope of utility model registration request] a cylinder member, a slide housed in the cylinder member so as to be movable between a first position protruding from the cylinder member and a second position retracted into the cylinder member; and a slide for always positioning the slide in the first position. a coil spring disposed between the cylinder member and the slide, the cylinder member being provided with a through hole having a length related to the travel distance of the slide;
A locking device in which the slide has a protrusion that engages an edge of the through hole in its first position, the cylinder member having a gap between the wall in which the through hole is formed and the slide; further comprising a second protrusion that engages the edge of the through hole at two positions;
The coil spring is arranged offset with respect to the central axis of the slide, and in the second position generates a moment on the slide about the point of contact between the second protrusion and the edge of the through hole. locking device.