JPH0345849B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an illuminated push button switch.

[Background technology]

In general, there are many types of illuminated push-button switches, including the types of switch parts and the colors and shapes of the buttons, which tends to make inventory management complicated. For this reason, conventionally the switch portion and the main body portion have been made into blocks, but it is not very easy to attach and detach them. FIG. 12 shows the switch part 71 and the main body part 72 for operation connected by screw 7.
3, and in this conventional example,
Since they are connected by screws 73, it is possible to attach and detach the main body section 72 and the switch section 71, but there is a problem in that the work is troublesome. FIG. 13 shows the switch part 71 and the main body part 72 connected to the lamp terminal 7.
4, and screw the end of the lamp terminal 74,
A switch part 71 and a main body part 72 are fixed. In this case, since the lamp terminal 74 is twisted, there is a drawback that once it is attached, it cannot be removed.

In FIG. 14, elastic fixing pieces 75 made of synthetic resin are formed on both sides of the main body part 72, and locking holes 76 are bored in the fixing pieces 75. On the other hand, locking holes are formed in the sides of the switch part 71, respectively. protrusion 7 that engages with 76;
7, and the switch portion 71 and the main body portion 72 are connected and fixed by engagement between the locking hole 76 and the projection 77. In such cases, installation is easy, but
Removal was troublesome as it required a jig, and there was also the problem of low strength.

FIG. 15 shows yet another conventional example,
This is described in Publication No. 139720. The main body 71 serving as an operating unit has an operating shaft 80 mounted on a supporting frame 7.
8 and is attached with a ring 79 or the like. A recessed portion 82 is formed on both sides of the base 81, and an engaging portion 83 is formed within this recessed portion 82. Two switch units 72 are attached to the base 81. Connectors 84 projecting from both sides of the frame 86 into the recesses 82 of the base 81. A coupling claw 85 that engages with the coupling portion 83 is formed. In this conventional example, two large units (main body part 71 and switch part 72) are directly fitted into each other, so in order to obtain mutual positional accuracy of the units, it is necessary to make the connecting claw 85 thick. As a result, there is a problem in that the shape is large.Furthermore, since the connecting claw 85 is thick, it is difficult for the user to attach and detach the unit.Furthermore, since the connecting claw 85 is simply fitted into both units, the switch section 72 There was a problem that the outer surface of the capacitor was exposed and no consideration was given to insulation, resulting in poor insulation.

[Purpose of the invention]

The present invention has been provided in view of the above-mentioned points, and provides an illuminated push button switch which has a main body part, a switch part, and a mounting nut part that are made into blocks to facilitate installation and removal, and which also has excellent insulation properties. The purpose is to

[Disclosure of the invention]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Fig. 1 shows an exploded perspective view of main body part A, switch part B, and mounting nut part C, Fig. 2 shows an exploded perspective view of main body part A, Fig. 3 shows an exploded perspective view of switch part B, and Fig. 4 shows an exploded perspective view of main body part A, switch part B, and mounting nut part C. The figure shows a perspective view of the mounting nut portion C, and FIGS. 5 and 6 show cross-sectional views of the whole. First, the main body portion A will be explained. In the figure, reference numeral 1 indicates a substantially cylindrical push button shaft, which has a rectangular light-transmitting member 2 formed at its upper part, and arm parts 3 made of an elastic body with a claw part 4 at the tip at two locations on the left and right of the lower part. is forming. The inclined portion of the light transmitting body portion 2 is formed as a reflecting plate 6, and a flange-like step portion 5 is integrally bored on the outer periphery of the light transmitting body portion 2. An engagement groove 7 is provided around the outer periphery of the central body of the push button shaft 1, and a flange-like stopper 8 is provided below and continuous with the engagement groove 7. 9 is a bubble lens like a filter, 10 is a transparent screen for marking characters, and 11 is a box-shaped light-transmitting cap with an open bottom. bubble lens 9
As shown in FIGS. 5 and 6, the transparent screen 10 is placed vertically on the upper end surface of the light transmitting body part 2 of the push button shaft 1, and the cap 11 is placed on the step part 5 of the light transmitting body part 2. It is placed and fitted. 12 is a waterproof rubber cap made of rubber, and this rubber cap 1
2 is formed into a substantially cylindrical shape, and an engaging protrusion 14 is integrally provided around the inner circumference of the upper part. Further, an engagement protrusion 15 is integrally provided around the inner circumference of the lower part of the rubber cap 12, and this engagement protrusion 15 is located outside of the engagement protrusion 14 at the upper part. 13 is a ring, and a groove 16 is cut around the lower part of this ring 13. The rubber cap 12 is located outside the push button shaft 1, and engages the engaging protrusion 14 with the engaging groove 7 of the push button shaft 1.
The second engaging protrusion 15 is engaged within the groove 16 of the ring 13. Reference numeral 17 denotes a main body case made of synthetic resin that houses and arranges the push button shaft 1, and a square head 1 at the top.
The light transmitting body portion 2 is positioned in the empty space 19 of 8. Main body case 1 is cylindrical and made of insulating material.
A threaded portion 20 is threaded on the outer peripheral surface of 7, and four elastic fixing arms 21 for fixing are integrally hung from the lower part. Furthermore, a locking pawl 22 is formed inside the lower end of each fixed arm 21 . 7th
The figure shows the cross-sectional shape of the locking pawl 22 of this fixed arm 21.

Next, the switch section B will be explained. Mainly in FIG. 3, reference numeral 23 denotes a switch case having a substantially cylindrical shape and made of an insulating material. Around the switch case 23, there are four V-shaped guide grooves 24 at the top and bottom corresponding to the fixed arms 21 of the main body case 17. It is formed over the direction. A locking protrusion 25 that engages with the locking claw 22 of the fixed arm 21 of the main body case 17 is integrally formed at the inner upper part of the guide groove 24, and the upper surface of the locking protrusion 25 has an inclined surface for easy engagement. 26. Further, a locking step portion 27 is integrally protruded from the lower part of one surface of the guide groove 24 . Reference numeral 28 designates a switch unit that is housed in the lower surface of the switch case 23. Three terminal plates 30 are hung from the lower surface of the insulating stand 29, and as shown in FIG. 6, movable contacts 32 are provided on the upper and lower surfaces. The base end of the movable contact plate 31 to which the movable contact plate 31 is fixed is pivotably mounted on the upper surface of the insulating stand 29. 33 is a fixed contact that faces the movable contact 32. Reference numeral 35 denotes a substantially L-shaped drive plate, one end of which is locked to the insulating stand 29, and the other end of which is a U-shaped spring plate 36.
is connected to one end of the The other end of the spring plate 36 is connected to the tip of the movable contact plate 31. In FIG. 6, when the drive plate 35 is pressed downward, the spring plate 36 is reversed and switched upward to the movable contact plate 31. When the pressing force of the driving plate 35 is released, the spring plate 3
The movable contact plate 31 and the drive plate 35 are returned to their original positions by the elastic return force of 6. 37 is a push button, and a light source 38 such as a light emitting diode is placed on the upper surface of the push button 37. A connection terminal plate 39 is suspended from the lower side surface of the light source body 38, and when the light source body 38 is placed on the upper surface of the push button 37, the terminal plates 39 are arranged closely or close to the side surface of the push button 37, respectively. Reference numeral 40 denotes a conductive connector terminal, the upper part of which forms an elastic contact piece 41 bent into a substantially U-shape.
The connector terminals 40 are housed in storage spaces 42 on both sides of the push button 37, and the abutment pieces 41 come into elastic contact with the side surfaces of the terminal plate 39 of the light source 38, making electrical contact connection. In addition, the push button 37 is the switch case 2.
The engagement protrusions 43 protruding from both side surfaces of the push button 37 are inserted into the switch case 23 from above, and the engagement holes 44 formed in the side walls of the switch case 23 are inserted into the switch case 23 from above.
By engaging with the push button 37, the push button 37 is positioned.
Furthermore, recesses 47 are formed in the lower portions of both sides of the switch case 23, and a coiled conductive connection spring 45 is accommodated in the recesses 47. The lower end of the connector terminal 40 is press-fitted into the upper end of the connecting spring 45, and the connecting spring 4
The upper ends of the lamp terminals 46 are press-fitted into the lower ends of the lamp terminals 5 to establish electrical connections. In this case, the press-fitting means is dimensioned so that the connection spring 45 comes into close contact with the push button 37 when the push button 37 is pushed down the entire stroke. 48 is a hook pin. 49 is a base fitted to the lower surface of the switch case 23;
An elastic engagement arm 50 is integrally formed on the upper surface of the base 49 in correspondence with the guide groove 24 of the switch case 23. At the upper end of the engagement arm 50, a locking step 27 of the guide groove 24 is provided.
An engaging pawl 51 that engages with is formed.

Next, the mounting nut portion C will be explained. Mainly in FIG. 4, 52 is a cylindrical nut, and the vertical length of this nut 52 made of insulating material is:
The length is longer than the sum of the vertical length of the threaded portion 20 of the main body case 17 and the length of the fixed arm 21. The inner peripheral surface of the nut 52 has a threaded portion 2 of the main body case 17.
A threaded portion 53 that is threaded into the threaded portion 0 is threaded. The threaded portion 53 of the nut 52 may be provided over the entire length in the vertical direction, but if it becomes too long, machining is troublesome, so it may be provided with a length approximately equal to the threaded portion 20 of the main body case 17. The thick wall portion 55 of the nut 52 other than the threaded portion 53 has an inner diameter that is the same as the inner diameter of the thread of the threaded portion 53, as shown in FIG. 54 is a rubber gasket.

The assembly will be described below. First, the rubber cap 12 having a waterproof structure will be explained. The engagement protrusion 14 on the upper side of the rubber cap 12 is engaged with the engagement groove 7 of the push button shaft 1. In this case, the inner diameter of the engaging protrusion 14 of the rubber cap 12 is made smaller than the outer diameter of the engaging groove 7 of the push button shaft 1, and is pressed against the engaging groove 7 by the elasticity of the rubber body. Next, when the ring 13 is inserted from below the push button shaft 1, the inner peripheral portion of the ring 13 rides over the claw portion 4 of the arm portion 3 of the push button shaft 1, and the ring 13 is prevented from coming off by the claw portion 4. Then, the engagement protrusion 15 on the lower side of the rubber cap 12 is fitted into the groove 16 of the ring 13. In this state, press button shaft 1, rubber cap 12, and ring 13.
Parts can be made into blocks. Next, this block-shaped push button shaft 1 is inserted into the main body case 17. The block-shaped push button shaft 1 is smoothly inserted up to the dimension B of the thin wall portion 56 at the center of the main body case 17, as shown in FIG. However, in the portion of dimension A of the thick wall portion 57 of the main body case 17, only the rubber cap 12 and the ring 13 come to rest in contact with the inner peripheral surface of the thick wall portion 57, and only the push button shaft 1 moves downward. Further, when the push button shaft 1 is pushed, the stopper 8 of the push button shaft 1 presses the ring 13, and the ring 13 and the rubber cap 12 are press-fitted and fixed at the lower part 58 of the thick part 57. The claw portion 4 of the push button shaft 1 is located at the bottom portion 58.
It climbs over and gets caught and fixed. Here, as shown in FIG. 6, the inner diameter of the thick part 57 of the main body case 17 into which the ring 13 is inserted is _l1 , the outer diameter of the groove 16 of the ring 13 is _l2 , and the groove of the ring 13 of the rubber cap 12 is The thickness of the engaging protrusion 15 that fits with the
l ₃ , and the inner diameter of the thin wall portion 56 of the main body case 17 is l _4.
In this case, the relationship l ₄ >(l ₂ +l ₃ ×2)>l ₁ holds. That is, by utilizing the elasticity of the rubber of the rubber cap 12, the ring 13 and the thick portion 57 of the main body case 17 are pressed against the rubber cap 12, thereby creating a waterproof structure.

Next, the light source body 38 is fixed to the push button 37, and the light source body 38 and the push button 37 are structured to be interlocked. The switch unit 28 from below the switch case 23,
By storing the lamp terminal 46, hook pin 48, etc., fitting the base 49 from the bottom surface, and engaging the engagement claw 51 of the engagement arm 50 of the base 49 with the locking step 27 of the switch case 23, the base 49 is fixed to the switch case 23. Also, insert the connecting spring 45 into the recess 4 from above the switch case 23.
7, and then insert the push button 37 from above. The fitting protrusion 43 of the push button 37 is connected to the switch case 2.
By engaging with the engagement hole 44 of No. 3, the push button 37 is fixed to the switch case 23. Then, connect the connector terminal 40 to the storage space 4 of the switch case 23.
The cut and raised piece 59 inserted into the inside of the connector terminal 2 and cut and raised outward of the connector terminal 40 is locked to a step 60 formed on the inner wall surface of the push button 37, and the connector terminal 40 is positioned and prevented from moving upward. Regulated. By the way, _l5 shown in FIG. 5 is the stroke of the push button 37, and as mentioned above, the dimensions are set so that the connection spring 45 comes into close contact with the push button 37 when the push button 37 is fully pressed, and the lamp terminal 46 and the connection spring 45 and the connector terminal 40,
If the push button 37 is fitted and pushed in the full stroke _l5 , the upper and lower ends of the connection spring 45 will be connected to the lamp terminal 4.
6 and the lower end of the connector terminal 40, respectively. Further, in this state, the contact piece 41 of the connector terminal 40 comes into elastic contact with the terminal plate 39 of the light source body 38 and is electrically connected. The main body part A is covered and fitted onto the switch part B thus assembled from above. That is, the fixed arm 21 of the main body part A is inserted into the guide groove 24 of the switch part B from above, the locking claw 22 of the fixed arm 21 climbs over the slope 26 of the locking protrusion 25 in the guide groove 24, By engaging the locking claws 22 and the locking protrusions 25 at four locations, the main body portion A and the switch portion B can be fitted and connected with one touch.
This state is the state shown in FIG. Here, if you press the cap 11 fitted on the push button shaft 1,
When the push button 37 is pushed downward, the abutting stepped portion 61 protruding from the lower surface of the push button 37 is pressed against the switch unit 28.
The driving plate 35 is pressed to open and close the contacts 32 and 33. As a result, power is supplied from the outside to the lamp terminal 46, and the light source body 38 is lit. When the push button shaft 1 is released from pressure, the push button 37 and the like of the push button shaft 1 are also returned to their original positions due to the return force of the connection spring 45. Light source 3
8 and the push button 37 are linked, so the light source 3
8 will also return. In other words, regardless of whether the light source 38 is turned on or off, the distance _l6 between the light source 38 and the bubble lens 9 shown in FIG. 5 does not change, so the illuminance remains constant. Such a structure constitutes a so-called illumination switch, but when the main body part A and the switch part B are used not as an illumination switch but simply as an indicator light, the following construction is adopted. That is, except for the switch unit 28, the push button 3
The dimensions of the connecting spring 45 are set so that the connecting spring 45 is in a close contact state when the button 7 is not pressed. Therefore, even if the push button shaft 1 is pressed, the push button shaft 1 and the push button 37 do not operate because the connection spring 45 is already in close contact with each other. In this way, by simply changing the connection spring 45, there is no problem in inserting the connection spring 45, and the push button shaft 1 and the push button 37 can also be fixed so that they do not move. It is something that can be changed.

Next, after the main body part A and the switch part B are fitted, the mounting nut part C is screwed onto the main body part A.
That is, the mounting nut part C is coupled to the main body part A by threading the nut 52 into the main body part A from below. This state is the state shown in FIG. In this way, since the main body part A and the mounting nut part C are attached with the switch part B as a reference, the positions of each part are determined with the switch part B as a reference.Therefore, the locking pawl 22 may be thin; The fixed arm 21 can also be made thinner. In addition, by making the locking pawl 22 smaller, the main body part A and the switch part B can be
Easy to attach and detach. Moreover, once the mounting nut part C is attached to the main body part A, as shown in FIG.
The first locking pawl 22 does not come off the locking protrusion 25, and the nut 52 can insulate the switch portion B from the outside. Next, when removing the nut 52 and removing the main body part A and the switch part B,
As shown in Fig. 11, the main body part A and the switch part B
When the fixed arm 21 is pulled strongly in the vertical direction,
is pushed outward and the main body part A and switch part B
It's off.

Note that the method of engaging the main body part A and the switch part B is not limited to the shapes of the fixed arm 21, the guide groove 24, etc., and for example,
A structure as shown in FIG. 4 may be used.

〔Effect of the invention〕

As described above, the present invention includes a switch unit having a contact opening/closing mechanism, a push button that drives the switch unit and is biased upward by a spring, a light source attached to the push button, and the above-mentioned components housed inside. The switch case is formed by a switch case made of an insulating material and has engaging parts formed at key points on the outer circumferential surface. , the main body part is formed by a main body case made of an insulating material, the lower part of which is provided with an engaged part that engages with the engaging part of the switch case, and a push button shaft that transmits light from a light source and is used to operate the push button, It has a cylindrical shape made of insulating material, has a threaded part on its inner peripheral surface that engages with the threaded part of the main body case, and is made of insulating material that is inserted from below the switch part to cover the switch part and the main body part. Since the mounting nut part is formed of a nut, the main body part and the switch part can be easily engaged by engaging the engaging part of the switch part and the engaged part of the main body part. It is possible, and furthermore,
The mounting nut part can be fixed to the main body part by screwing the thread part of the main body case with the thread part of the nut.In this way, the main body part and the mounting nut part installation of,
It has the effect of being able to be removed with a single touch, and since the mounting nut covers the switch and main body, it provides sufficient insulation for the engagement part between the switch and the main body, and also provides protection for the switch. On the other hand, the main body part and the mounting nut part provide double insulation, which greatly improves the insulation properties, and the mounting nut part also has the effect of reinforcing the outer shell.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2 is an exploded perspective view of the main body part of the same as above, Fig. 3 is an exploded perspective view of the switch part of the same as above, and Fig. 4 is a perspective view of the mounting nut part. , FIG. 5 is an overall sectional view of the same as above, FIG. 6 is a sectional view showing a fitted state of the main body part and switch part of the above, FIG. 7 is an enlarged sectional view of the fixed arm of the above,
Fig. 8 is an enlarged sectional view of the locking protrusion as above, Fig. 9 is a sectional view of the nut as above, Fig. 10 is a sectional view as above, Fig. 11 is an explanatory diagram of the same as above, and Fig. 12 is a conventional example. 13 is a sectional view of another conventional example,
FIGS. 14a and 14b are a sectional view and a perspective view of another conventional example, and FIG. 15 is an exploded perspective view of another conventional example. 1 is a push button shaft, 17 is a main body case, 20 is a screw part, 23 is a switch case, 28 is a switch unit, 37 is a push button, 38 is a light source, 52 is a nut, 53 is a screw part, A is a main body part, B is a The switch part and C indicate the mounting nut part.

Claims (1)

[Claims] 1. A switch unit having a contact opening/closing mechanism, a push button that drives the switch unit and is biased upward by a spring, a light source attached to the push button, and each of the above members are housed inside, and placed at key points on the outer circumferential surface. The switch case is formed of an insulating material and has an engaging part formed thereon, and the switch part is covered from above and has a substantially cylindrical shape with a threaded part on the outer peripheral surface. The main body is formed by a main body case made of an insulating material, which has an engaged part that engages with the part, and a push button shaft that transmits light from the light source and is used to operate the push button. A mounting nut part is formed, which has a threaded part on the inner circumferential surface that engages with the threaded part of the main body case, and is a nut made of an insulating material that is inserted from below the switch part and covers the switch part and the main part. An illuminated push button switch.