JPH0594732A - Pushbutton switch structure - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Not only good assembly, but also good appearance and appearance, and push button switch that can prevent foreign matter from entering the case. Provide structure. [Structure] Lock plunger 1 having lock mechanism 20
8 and the lock plunger 18 is detachably mounted inside, and the lock member 25 is projected by pushing the lock plunger 18 at the time of mounting so as to be in a locked state, and the locked state is released by rotating the lock plunger 18. -11, an engaging protrusion 12, a cover mounting portion 2 and a base mounting portion 3 and a base member 35, a return spring 46 and an operating plunger 41 mounted on the base mounting portion 3. 1, the engaging hole 9 with which the engaging projection 12 engages when the cover is attached, and the terminal 53 is detachably attached after the cover is attached to the cover attaching portion 2 to connect the terminal 53 to the socket portion 39. The lamp unit 48 and the push button 57 for covering the engaging hole 9 of the case 1 with the skirt portion 58 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button switch structure for an emergency stop.

[0002]

2. Description of the Related Art As a conventional push button switch structure of this type, one shown in FIG. 5 is known. In FIG. 5, 7
0 is a push rod which has a push button 71 screwed into its head and has a groove 72, an inclined surface 73 and a convex portion 74 at its lower end, and 75 is a case 76.
A pin 80 which is movably accommodated in a guide case 78 attached by a screw 77 to the push rod 70 side by a spring 79 and a lower push rod 80 which is guided by a base 81 to operate a switch 82. , 83, 84 are return springs, respectively. When the push button 71 is pressed, the push rod 7
0 is pushed down and the pin 75 in contact with the groove 72 of the push rod 70 is guided by the inclined surface 73 and moves outward against the spring 79. The push rod 70 is further pushed down and the pin 7
5 is moved inward by the spring 79 and protrudes on the upper surface of the convex portion 74 to maintain the pressed state of the push button 71. At this time, the push rod 71 pushes down the lower push rod 80 to lower the lower push rod 80.
The switch 82 is operated by. Next, to release the pressed state of the push button 71, the push button 71 is rotated. At this time, the push rod 70 also rotates, and a groove (not shown) through which the pin 75 can pass is formed in the convex portion 74 of the push rod 70. Spring 8
The push rod 70 and the lower push rod 80 are returned by 3, 84, and the pin 75 is returned to the groove 72. Also, the return spring 8
4, the push rod 70 returns to the position before the rotation.

[0003]

However, in the conventional example, when assembling, the respective parts are sequentially incorporated into the case 76, and the assembling work is performed inside the narrow case 76. Therefore, the workability is poor, and the push button 71 does not cover the outer peripheral portion of the case 76, so that the outer peripheral portion can be seen directly and the appearance is not good, and the case is not visible. There is a problem in that it is impossible to prevent foreign matter from entering the 76 side.

The present invention has been made by paying attention to the above-mentioned problems, and its purpose is not only to improve the assemblability but also to improve the appearance and appearance. An object of the present invention is to provide a push button switch structure capable of preventing foreign matter from entering the case side.

[0005]

In order to achieve the above-mentioned object, the present invention provides a lock plunger having a lock mechanism having a lock member protruding outward by the urging force of a spring, and the lock plunger inside. A cover that is detachably attached to the cover and that is locked when the lock plunger is pushed by pushing the lock plunger into the locked state and that the locked state is released by rotating the lock plunger.
A base member having an engaging projection provided on the outer peripheral portion of the cover, a cover mounting portion to which the cover is detachably mounted and a base mounting portion, and a socket portion in the base mounting portion. And a return spring and an operating plunger are mounted on the case, an engaging hole provided on the cover mounting portion of the case and engaged with an engaging projection when the cover is mounted, and a cover mounting portion. Equipped with a lamp unit that is detachably attached after the cover is attached to connect the terminals to the socket, and a push button that is detachably attached to the lock plunger to cover the engaging hole of the case with the skirt. It is characterized by

[0006]

With this structure, the lock plunger is attached to the cover, the cover with the lock plunger is inserted into the cover attaching portion of the case, and the engaging protrusion of the cover is attached to the cover.
By engaging the cover with the lock plunger, the cover with the lock plunger is attached to the case with one touch, and the lamp assembly is attached from the inside of the lock plunger to the inside of the operation plunger and pushed against the lock plunger. By attaching the button, the switch operation unit is assembled and its assemblability is improved. Also, the push button is
Since the skirt portion covers the outer peripheral portion of the case and hides the engaging hole located in the outer peripheral portion from the outside, the appearance and appearance are improved, and It is possible to prevent foreign matter from entering the case side.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a DC conversion switch structure according to the present invention, and FIG. 2 is a plan view of the same portion cut away.

The push button switch structure according to the present invention comprises a switch operating unit A, a switch unit B and a lamp unit 48. The switch operating unit A is provided with a case 1, and the case 1 is provided with a cylindrical cover mounting portion 2 at an upper portion thereof and a base mounting portion 3 at a lower portion thereof. Step portions 4 and 5 are formed between the mounting portion 2 and the base mounting portion 3, and an annular spring receiving groove 6 is formed in the lower step portion 5. 6 has stopper 7
Is provided. Guide convex portions 8 are formed on the inner peripheral surface of the cover mounting portion 3 at predetermined intervals in the circumferential direction, and the cover mounting portion 3 is provided with an engaging hole 9 with a phase shift of 180 degrees. Is formed. 18 is provided below the base mounting portion 3.
Engagement holes 10 are formed with a 0 ° phase shift.

The cover 11 has a plane annular shape.
Guide recesses 11 are formed on the outer peripheral surface of the cover 11 at predetermined intervals in the circumferential direction, and engaging projections 12 are formed on the outer peripheral surface of the cover 11 with a phase shift of 180 degrees.
An upper annular groove 13 and a lower annular groove 14 having a diameter larger than that of the upper annular groove 13 are formed on the inner peripheral surface of the cover 11.
A locking groove portion 15 is formed on the peripheral surface 14a of the lower annular groove 14 with a phase shift of 180 degrees. As shown in FIG. 3, these locking groove portions 15 have an inclined surface 16 on the right side, and the locking groove portion 15 is connected to the peripheral surface 14 a of the lower annular groove 14 via the inclined surface 16. The locking groove 15 is formed on the peripheral surface 14a of the lower annular groove 14.
Is provided with a pin-shaped stopper 17 at a position shifted in phase by 90 degrees.

The lock plunger 18 is a cylindrical body, and a flange portion 19 is formed on the outer peripheral portion of the lock plunger 18, and a locking mechanism is provided on the peripheral surface portion of the flange portion 19 with a phase shift of 180 degrees. 20 is provided. That is, the lock mechanism 20 has the lock member insertion hole 2 formed in the collar portion 19.
1, a spring receiving portion 22 and a protrusion 23 are provided at the bottom of the lock member insertion hole 21, and a pair of groove portions 24 facing each other are formed on the peripheral surface of the lock member insertion hole 21. I am doing it. The locking member 25 has a planar U-shape,
A spring receiving portion 26 and a protrusion 27 are formed inside the lock member 25, and a protrusion 29 is formed on the outside of the tip of the left and right leg portions 28. Then, the lock member 25 is inserted into the lock member insertion hole 21, and the projection 29 of the leg portion 28 is inserted.
Is inserted into the groove portion 24, and a spring 30 is interposed between the spring receiving portion 22 of the lock member insertion hole 21 and the spring receiving portion 26 of the lock member 25. The protrusion 29 is biased outward and the protrusion 29
The locking member 25 is caught by the edge portion 24a of No. 4 and regulates the protrusion of the locking member 25.

Further, a threaded portion 31 is formed on the outer periphery of the lock plunger 18 above the collar portion 19, and the collar portion 19 is formed.
The lower side of the spring receiving portion 32 is formed with a stopper 33. A groove 34 is formed on the peripheral surface of the flange 19 at a position 90 degrees out of phase with the lock member insertion hole 21 to regulate the rotation range of the lock plunger 18.

The lock plunger 1 is attached to the cover 11 described above.
8 can be assembled. That is, the lock plunger 18 is inserted into the cover 11, the lock member 25 is inserted into the lock member insertion hole 21 against the spring 30, and the collar portion 1 is inserted.
9 is inserted into the upper annular groove 13, and the lock member 25 is in contact with the peripheral surface of the upper annular groove 13. The pin-shaped stopper 17 in the case 1 is provided with the groove portion 3 for restricting the rotation range of the cover 11.
Inserted in 4.

A base member 35 is mounted in the base mounting portion 3 of the case 1. That is, the base member 3
An engaging projection 36 is provided on the peripheral surface of the base 5, and the engaging projection 36 is engaged with an engaging hole in the lower portion of the case to form the base member 3.
5 is attached. A guide groove 37 is formed in the base member 35 at a position 90 degrees out of phase with the locking projection 36, and a projection 38 is provided at the center of these guide grooves 37. The base member 35 is provided with a socket portion 39, and the socket portion 39 is provided with a pair of lamp terminals 40. A return spring 46 and an operation plunger 41 are inserted in the upper part of the base mounting portion 3 of the case 1.
That is, the outer periphery of the upper portion of the operation plunger 41 has
Groove 42 is formed, a pair of legs 43 are formed in the lower part of the operation plunger 41, and long holes 44 are formed in these legs 43. Member 3
5 is inserted in the guide groove 37, and the elongated hole 44 is inserted in the protrusion 38. Then, the return spring 46 raises the operation plunger 41 so that the protrusion 38 causes the lower edge portion 4 of the elongated hole 44 to move.
It is in contact with 4a. A seal member 45 is housed in the seal groove 42.

The cover mounting portion 2 of the case 1 has a cover 11 incorporating the lock plunger 18 as described above.
Is attached with one touch. That is, the hook spring 47 is inserted into the cover mounting portion 2 and the lower end portion 47 of the hook spring 47 is inserted.
a is inserted into the spring receiving portion 6 and the end portion 47b of the coil wire is applied to the stopper 7, and the cover 11 is inserted into the guide recess 11a.
Is fitted into the guide convex portion 8 of the case 1 and inserted into the cover mounting portion 2, and the engaging projection 12 of the cover-1 is engaged with the engaging hole 9 of the case 1. In this case, the upper end portion 47 of the hook spring 47
c contacts the spring receiving portion 32 of the lock plunger 18, the end portion 47d of the coil wire thereof contacts the stopper 33, and the lower surface portion of the lock plunger 18 contacts the upper surface portion of the operation plunger 41.

As described above, after the cover 11 incorporating the lock plunger 18 is mounted on the cover mounting portion 2 of the case 1 with one touch, the lock plunger 18 is
From the inside to the inside of the operation plunger 41, the lamp assembly 4
8 is attached. That is, the lamp assembly 48 includes a lamp body 49 and a lamp holder 50, and guide grooves 51 are formed in the outer peripheral portion of the lamp body 49, and the projections 52 are provided in the guide grooves 51. There is a pair of terminals 53 protruding from the lower end of the lamp body 49. Further, leg portions 54 are formed in the lower portion of the lamp holder 50, and long holes 55 are formed in these leg portions 54. Then, the lamp body 49 is inserted into the lamp holder-50, and the protrusion 52 is inserted into the elongated hole 55.
The seal member 57 is attached to the seal groove portion 56 at the outer peripheral portion of the lamp assembly 0 to form the lamp assembly 48.

When the lamp assembly 48 is mounted from the inside of the lock plunger 18 to the inside of the operation plunger 41, the terminal 53 is inserted into the socket portion 39 to contact the lamp terminal 40, and the lower portion of the lamp holder 50 is It is fitted to the operation plunger 41 via the seal member 57.

The threaded portion 3 of the lock plunger 18
A push button 57 is screwed onto the device 1. This push button 57
A cylindrical skirt portion 58 is provided on the outer peripheral portion of the case 1, and the skirt portion 58 covers the outer peripheral portion of the case 1 to hide the engaging hole 9 located in the outer peripheral portion from the outside. ing. A seal groove 59 is formed on the inner peripheral surface of the skirt 58.
A seal member 60 is mounted in the seal groove 59, and the seal member 60 is in contact with the outer peripheral surface of the case 1.

The switch operation unit A constructed as described above is connected to the switch unit B to form a push button switch structure. In this case, the lamp terminal 40 of the switch operation unit A is in contact with the lamp connection terminal 61 of the switch unit B, and the leg portion 43 of the operation plunger 41 contacts the push button portion 63 of the switch portion 62 of the switch unit B. Touching.

Next, the operation will be described. By pushing (pushing and pushing) the push button 57, the lock plunger 18 and the operation plunger 41 are pushed in against the return spring 46, and the leg portion 43 of the operation plunger 41 pushes the push button portion of the switch portion 62 of the switch unit B. 63 is pushed in and these switch parts 62 are turned on. In this case, when the lock plunger 18 and the operation plunger 41 are pushed in, the lock mechanism 20 also moves, the lock member 25 of the lock mechanism 20 falls into the lower annular groove 14 of the cover -1, and is locked by the urging force of the spring 30. The member 25 jumps out into the locking groove portion 15 and engages with this to be locked.

The switch 62 is released by releasing this locked state.
When the switch is turned off, the push button 57 is rotated to rotate the lock mechanism 20, and the lock member 25 thereof is moved from the lock groove portion 15 to the surface portion 14a of the lower annular groove 14 via the inclined surface portion 16. The lock member 25 is pushed into the lock member insertion hole 21 against the spring 30. Therefore, the lock is released. In this case, by rotating the push button 57, the hook spring 47 is twisted and put in a compressed state. In this way, when the lock is released, the operation plunger 41 and the lock plunger 18 are returned to the positions before being pushed by the urging force of the return spring 46, and the switch portion 62 of the operation plunger 41 is pushed into the push button portion 63. Is released,
The switch unit 62 is turned off. At the same time, the locking mechanism 20 is inserted into the upper annular groove 13, and the biasing force of the hook spring 47 causes the locking plunger 18 to rotate and return to its original position.

A seal groove 59 is formed on the inner peripheral surface of the skirt portion 58, and the seal groove 59 is formed in the seal groove 59.
The seal member 60 is attached, and the seal member 60 is a case 1
Since it is in contact with the outer peripheral surface of the case, foreign matter is prevented from entering from this portion between the case 1 and the push button 57 and into the case 1, and troubles such as malfunctions are prevented.

According to the above-described embodiment, the lock plunger 18 is attached to the cover 11, and the lock plunger 18 is attached.
The lock plunger 18 is mounted by inserting the cover 11 fitted with the above into the cover mounting portion 2 of the case 1 and engaging the engaging projection 12 of the cover-1 with the engaging hole 9 of the case 1. The built-in cover 11 is mounted on the case 1 with one touch, and the lamp assembly 48 is mounted between the lock plunger 18 and the operation plunger 41.
By attaching the push button 57 to the switch operating unit B, the assembling property is improved, and the push button 57 has the skirt portion 58.
The skirt portion 58 covers the outer peripheral portion of the case 1,
Since the engagement hole 9 located at the outer peripheral portion is hidden from the outside, the appearance and appearance are improved and foreign matter can be prevented from entering the case 1 side.

[0023]

As described above, according to the present invention, there is provided a lock plunger having a lock mechanism having a lock member protruding outward by the urging force of a spring, and the lock plunger detachably mounted inside. The cover is adapted to be pushed into the lock member to push it into a locked state when the lock plunger is mounted, and to release the locked state by rotating the lock plunger, an engaging projection provided on an outer peripheral portion of the cover, and a cover. A cover that is detachably attached
A base member having a mounting portion and a base mounting portion, the base mounting portion having a socket portion, a case having a return spring and an operating plunger mounted thereon, and a cover mounting portion of the case. To the engagement hole where the engaging projection engages when the cover is attached, the lamp unit which is detachably attached after the cover is attached to the cover attachment portion and which connects the terminal to the socket portion, and the lock plunger. It is detachably attached and can be attached to the skirt
Since it has a push button that covers the engagement hole of the cover, the lock plunger is attached to the cover, and the cover with the lock plunger is inserted into the cover attachment portion of the case to engage the protrusion of the cover. By engaging with the engagement hole of the case, the cover incorporating the lock plunger can be attached to the case with one touch, and the lamp assembly can be attached between the lock plunger and the operation plunger to lock the lock plunger. By attaching the push button to the plunger, the switch operation unit is assembled and its assemblability is improved.

The push button has a skirt portion,
Since the skirt portion covers the outer peripheral portion of the case and hides the engaging hole located in the outer peripheral portion from the outside, the appearance and appearance are improved and foreign matter on the case side is improved. Intrusion can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a push button switch structure according to the present invention.

FIG. 2 is a vertical sectional view of a switch operating unit having a push button switch structure according to the present invention.

FIG. 3 is a transverse sectional view of the same.

FIG. 4 is a perspective view of the same disassembled state.

FIG. 5 is a vertical cross-sectional view of a conventional push button switch structure.

[Explanation of symbols]

 1 Case 2 Cover Mounting Part 3 Base Mounting Part 9 Engagement Hole 11 Cover 12 Engagement Protrusion 18 Lock Plunger 25 Lock Member 30 Spring 39 Socket Part 41 Operation Plunger 46 Return Spring 48 Lamp Unit 57 Push Button 58 Skirt section

Claims (1)

[Claims] 1. A lock plunger having a lock mechanism having a lock member protruding outward by a biasing force of a spring, and a lock plunger detachably attached to the inside of the lock plunger, and the lock plunger is pushed by pushing the lock plunger at the time of attachment. A cover that is projected to be in a locked state and is unlocked by rotating the lock plunger;
A base member having an engaging projection provided on the outer peripheral portion of the cover, a cover mounting portion to which the cover is detachably mounted and a base mounting portion, and a socket portion in the base mounting portion. And a return spring and an operating plunger are mounted on the case, an engaging hole provided on the cover mounting portion of the case and engaged with an engaging projection when the cover is mounted, and a cover mounting portion. Equipped with a lamp unit that is detachably attached after the cover is attached to connect the terminals to the socket, and a push button that is detachably attached to the lock plunger to cover the engaging hole of the case with the skirt. Push button switch structure characterized by