JP2980934B2 - Pushbutton protection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a fire alarm / emergency alarm system and the like.
The present invention relates to a push button protection device for protecting a push button switch of a transmitter or the like.

(Prior Art) Conventionally, as a protection device for this type of push button, as shown in FIG. 6, a cover c having a push button switch operation hole d in a box c containing a push button switch a via an attachment frame b is provided. Is attached, and the hole d is crushed by a synthetic resin protective plate f capable of being crushed.
Obstructions are common. However, in the above device,
If the protection plate f is crushed during the operation of the push button g, the protection plate f cannot be reused. Therefore, a new protection plate must be replaced, which is uneconomical. Was.

In order to solve the above problem, the present applicant has already proposed a reusable transmitter capable of operating the push button without crushing by making the protection plate movable.

(Means for Solving the Problems) By the way, in the protection device for the push button in the above-mentioned transmitter, when returning the protection plate once operated, after removing the cover from the box and removing the protection plate from the cover, Then, the push button of the push button switch is returned to the pulled-out state, the protection plate is fitted into the mounting frame again, and then the cover is attached to the box, so that there is a problem that the recovery work of the protection plate is troublesome.

The present invention has been devised in consideration of the above-described actual situation, and its purpose is to enable a push button operation without crushing the protection plate, and one-touch recovery of the protection plate after the push button operation. An object of the present invention is to provide a push button protection device that can be operated.

(Means for Solving the Problems) In the present invention, the following technical means have been taken in order to achieve the above object.

That is, the present invention comprises a push button switch, a body and a cover that house the switch via a mounting plate, and a protection plate that closes a push button switch operation hole provided in the cover, and by pressing the protection plate. A push-button protection device in which a push-button is pushed to activate the switch, and an upper surface of the mounting plate is an annular body that locks the protection plate over substantially the entire circumference when the push-button is operated. The released protection plate locking member is mounted, and the protection plate locking release for releasing the locking of the protection plate to the protection plate locking member by pushing out the separated portion of the protection plate locking member. Means is provided, a protection plate return spring is provided between the protection plate and the mounting plate, and the release means is configured to be able to be pressed from an operation window provided in the cover.

The protection plate can be mounted on the mounting plate via a holding cover provided with a push button switch operation opening, and the holding cover can be provided with protection plate unlocking means.

The protection plate locking member may be made of a spring body, for example, a metal linear spring, or a synthetic resin material having a linear spring at a base.

According to the present invention, when the protection plate is strongly pushed from the outside in an emergency or the like, the protection plate is pushed in against the resilience of the return spring, and the push button of the push button switch is pushed by the protection plate. In operation, the protection plate is locked over substantially the entire circumference by the locking member at the pressing limit of the protection plate, and the protection plate is held in the pressed state. In this state, the operation state of the push button switch is maintained.

Therefore, when restoring the protection plate to a reusable state, the locking member is released from the protection plate by pressing the protection plate unlocking means, and the protection plate is released by the elastic force of the return spring. It is pushed back outward and returns to the old state with one touch.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

The drawing shows a transmitter, and 1 is a push button switch, and a push button 1b is provided so as to be able to move back and forth from the switch body 1a. When the push button 1b is in a withdrawn state, it is off, and when it is in a pushed state, it is on. Unless the push button 1b is operated, the drawn state is not changed to the pushed state, but when the pushing force of the push button 1b is released, the drawn state is automatically set to the off state. 1c is a mounting screw hole.

Reference numeral 2 denotes a transmitter body, and 3 denotes a cover. A switch mounting tool 4 is fixed in the body 2, a push button switch operation hole 5 is provided in the center of the cover 3, and a synthetic resin mounting plate 6 is provided. An attachment hole 7 to be attached to the body 2 and a protection plate lock release operation window 8 are provided. A rectangular door frame 9 is fitted into the window 8, and a door 10 is attached so as to be openable and closable.

Reference numeral 11 denotes a synthetic resin protective plate, 12 denotes a protective plate locking member, 13 denotes a coil-shaped protective plate return spring, 14 denotes a protective plate pressing cover, and 15 denotes a release button made of synthetic resin, which is a protective plate locking release means. is there.

The mounting plate 6 is substantially disc-shaped, and has a push button insertion hole 16 provided in the center and a push button switch mounting hole 17 provided outside thereof, and the switch body 1a is mounted by mounting screws 18. The push button insertion hole 16 is provided on the front surface of the mounting plate 6.
A protective plate guide wall 19 composed of an annular wall is provided concentrically with the projection wall, and a partition 20 having an upper circular lower shape is provided on the outside of the guide wall 19 so as to be substantially concentric, and is provided between the two walls 19, 20. A protection plate locking member accommodating portion 21 is formed, and a substantially U-shaped locking member fixing guide 22 is provided inside the square portion 20a of the partition wall 20.
In addition, on the outer peripheral surface of the fixed guide 22 side of the guide wall 19, a protection plate detent protrusion 23 is provided in parallel with the center axis of the insertion hole 16, and a partition wall circular portion 20b on the opposite side of the protrusion 23 is provided.
Is provided with a release button housing recess 24 protruding outward. Further, on the front surface of the mounting plate 6, a cover mounting base 26 having a screw hole 25 and a holding cover mounting base 2 having a screw hole 27 are provided.
8, a mounting plate fixing screw hole 29 is provided, the mounting plate 6 is fixed by a screw 30 inserted through the screw hole 29, and the cover 3 is fixed to a rubber washer 32 by a fixing screw 31 inserted through the screw hole 7. Is attached to the cover mounting base 26 via a.

The protection plate 11 has a circular cap shape and its opening edge is bent outward in the radial direction to form a locking portion 33, and the locking member 12 is locked to the locking portion 33. An engagement notch 34 for engaging and guiding the protrusion 23 of the mounting plate 6 is provided on a part of the cylindrical portion in the circumferential direction, and the notch 34 and the protrusion are provided.
23 prevents the protection plate 11 from rotating.

The protection plate locking member 12 is formed by bending a spring steel wire into an upper circular downward shape, so that both end edges 12a and 12b of the wire are located on both sides with a slight interval across a line passing through a circle and a square center. When the locking member 12 is formed and fitted into the protection plate locking member receiving portion 21 of the mounting plate 6, the locking member fixing guide 22 of the mounting plate 6 is strongly clamped and fixed by the square portion 12c. And both end edges 12a and 12b are located in the release button accommodating recess 24. The locking member 12 includes
In the normal and locked state, the interval between the two ends 12a and 12b is sandwiched as shown by a two-dot chain line in FIG. 4 and can be engaged with the locking portion 33 of the protection plate 11. As a result, the both end edges 12a and 12b are pushed and expanded as shown by the solid lines in the same figure, and the inner diameter of the circular portion of the engagement member 12 becomes smaller than the engagement portion 33 of the protection plate 11.
Slightly larger than the outer diameter, protection plate by return spring 13
11 is pushed forward.

The protection plate pressing cover 14 has an upper circular lower shape so that it can be fitted to the front end of the partition wall 20 of the mounting plate 6, and the protection plate 11 is guided by the push button switch operation opening 14a on the inner inner peripheral surface. A release button operation part insertion hole 35 having a square hole shape is provided on the side of the circular part opposite to the square part 14b.
Further, on the outer peripheral portion of the holding cover 14, a mounting ear portion 36 is provided so as to protrude in correspondence with the mounting base 28 of the mounting plate 6, and a tapping screw 38 is inserted through a screw insertion hole 37 provided in the ear portion 36. The mounting plate 6 is fixed to a mounting base 28. In addition,
Reference numeral 39 denotes a locking member fixing rib, which is a square portion 12c of the locking member 12.
Is fixed so that it does not move forward.

The release button 15 is formed integrally with a prismatic pressing operation part 15a and a wedge-shaped locking member end expanding part 15b, and the end of the operation part 15a releases the pressing cover 14. It is fitted so as to protrude forward from the button operation section insertion hole 35.

In the above embodiment, the operation state will be described. As shown in FIG. 2, the push button 1b and the protection plate 11 are always in the pulled-out state, and the locking portion 33 of the protection plate 11 is engaged with the back surface of the press cover 14. The protection plate 11 is pressed by the return spring 13 and is not pressed, so that the push button 1b is not operated by itself unless the protection plate 11 pushes the push button 1b unless a predetermined pressing force is applied. Therefore, when the protection plate 11 is pressed with a pressing force exceeding a predetermined value, the protection plate 11 is pressed.
Against the elastic force of the return spring 13,
At the same time, the push button 1b is pushed and the push button switch 1 is operated. At this time, the locking portion 33 of the protection plate 11 pushes and expands the protection plate locking member 12 to lock the locking member 12 to the locking portion 33 as shown in FIG. Thus, the protection plate 11 is also held in the pressed state while the push button switch 1 is in the on state.

Next, when the door 10 is restored from the pushed state to the pulled-out state so that it can be reused, when the door 10 is opened and the operation portion 15a of the release button 15 is pressed, both end edges 12a and 12b of the locking member 12 are pushed and expanded. As shown in FIG. 4, the inner peripheral edge of the locking member 12 becomes larger than the outer edge of the locking portion 33 of the protection plate 11, and the protection plate 11 and the push button 1b are pulled out by the return spring 13. Becomes
The push button switch 1 returns to the off state.

FIG. 5 shows another embodiment of the protection plate locking member 12, which is formed into a shape similar to that of the above-mentioned embodiment so as to have a slight flexibility by a synthetic resin material, and is formed in a square portion 12c. A U-shaped elastic material 12d made of a spring steel wire is inserted.
Even in the locking member 12 of this embodiment, the same operation and effect as those of the above embodiment can be expected.

The present invention is not limited to the above embodiment. For example, the holding cover 14 can be formed integrally with the cover 3 and formed of a synthetic resin material. Yes, it can be used for pushbutton switches other than transmitters.

(Effects of the Invention) As described above, the protection device for a push button of a push button switch according to the present invention has a protection plate locking member for locking the protection plate when the push button is operated, on the upper surface of the mounting plate. Protective plate lock release means is provided, a protective plate return spring is provided between the protective plate and the mounting plate, and the release means is configured to be operable from an operation window provided on the cover, thereby providing protection. The push-button operation can be performed without crushing the plate, and the protection plate can be restored after the push-button operation by a one-touch operation simply by pressing the protection plate unlocking means from outside, and the protection plate can be used for a long time. Further, since the protection plate locking member locks the protection plate over substantially the entire circumference at the time of operating the push button, the protection plate is inclined when the protection plate is pressed and locked to the protection plate locking member. Without being locked, the entire body is kept sunk, so that the pressing operation can be visually recognized easily.

[Brief description of the drawings]

1 to 5 show an embodiment of the present invention.
The figure is an overall exploded perspective view of the transmitter, FIG.
FIG. 3 is a sectional view of a main part in an operating state, FIG. 4 is an explanatory view of an operation of the protection plate locking member, FIG. 5 is a front view of another embodiment of the protection plate locking member, and FIG. It is a center cross-sectional view of FIG. 1 ... push button switch, 1b ... push button, 2 ... body, 3 ...
... Cover, 5 ... Push button switch operation hole, 6 ... Mounting plate,
8 ... operation window, 11 ... protection plate, 12 ... protection plate locking member,
13 ... Protection plate return spring, 14 ... Presser cover, 14a ... Press button switch operation opening, 15 ... Protection plate lock release means.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-225445 (JP, A) JP-A 48-102569 (JP, U) JP-A 1-155620 (JP, U) JP-A 55- 92224 (JP, U) Japanese Utility Model Showa 51-106870 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01H 9/02-9/04 H01H 13/62 H01H 13/14 H01H 13/04

Claims (3)

(57) [Claims] 1. A pushbutton switch comprising: a pushbutton switch; a body and a cover housing the switch via a mounting plate; and a protection plate for closing a pushbutton switch operation hole provided in the cover. Is a push button protection device in which the switch is actuated by being pushed in. An annular body is provided on the upper surface of the mounting plate for locking the protection plate over substantially the entire circumference when the push button is operated, and is partially open. Protective plate lock releasing means for releasing the lock of the protective plate to the protective plate locking member by mounting the separated protective plate locking member and expanding the open portion of the protective plate locking member. Wherein a protection plate return spring is provided between the protection plate and the mounting plate, and the release means is configured to be able to be pressed from an operation window provided on the cover. . 2. The protection of a push button according to claim 1, wherein said protection plate is mounted on a mounting plate via a holding cover having a push button switch operation opening, and said holding cover is provided with a protection plate unlocking means. apparatus. 3. The push button protection device according to claim 1, wherein the protection plate locking member is a spring.