JPS598270Y2 - push button switch - Google Patents

Description

[Detailed description of the invention] The present invention relates to a pushbutton switch, and in particular:
This relates to a push-push type pushbutton switch.

For conventional push-push type pushbutton switches, for example, a locking pin is engaged with a heart-shaped cam groove, and when the pushbutton is pressed down, the pin moves along the cam groove, thereby locking the pushbutton switch. There were also arrangements for the cancellation of the same.

In this type of conventional structure, the lock pin is resiliently mounted on a fixed frame so that it is pressed against the bottom of the cam groove, and when the end moves along the cam groove, it moves in a direction parallel to itself. was under control.

A certain step is provided on the bottom of the cam groove.
By varying the depth of the cam groove, the lock pin was able to move in a fixed direction along the groove.

However, in such conventional mechanisms, the lock pin is always pressed against the bottom surface of the cam groove with a constant force, so the bottom surface of the cam groove may wear out over a long period of time, causing the step to become missing and malfunction. In order for the lock pin to move smoothly along the cam groove, the ends of the lock pin are often made smooth and a type of lubricant is often used.

In order to eliminate the drawbacks of this type, some mechanisms have been proposed in which the tip of the lock pin does not come into contact with the bottom of the cam groove, but in these mechanisms, in order to keep the tip of the lock pin away from the bottom of the cam groove A special spring for holding the pin is required, or a large amount of deviation of the lock pin is required, which inevitably increases the contact pressure between the cam surface and the lock pin, resulting in a large amount of wear on the cam surface, and I was not satisfied with the overall size of the switch.

The purpose of the present invention is to eliminate the drawbacks of the conventional devices as described above, and to provide a push button switch that is simple, compact, and capable of performing reliable, stable, and crisp switch operation over a long period of time with little wear. That's true.

According to the present invention, by providing a lock pin and a control pin that controls the lock pin, the necessary deviation of the lock pin is minimized, so the spring pressure of the lock pin is also minimized, and therefore, the contact between the cam surface and the lock pin is minimized. The pressure is also minimized, resulting in less wear even after long-term use.Furthermore, since the operation of the lock pin is reliably controlled by the control pin, reliable and stable operation can be achieved at all times.

In addition, according to the present invention, the lock pin and control pin are extended horizontally and fixedly arranged, and the operation plate is moved vertically relative to the lock pin, thereby increasing the space utilization rate and making it simple and compact. The mechanism can be
Moreover, the tip of the lock pin does not come into contact with the bottom of the cam groove, and even without making the tip of the lock pin particularly smooth or using lubricant, smooth and crisp switch operation can be achieved. I can make you do it.

Next, the present invention will be described in detail with regard to embodiments of the present invention based on the accompanying drawings.

FIG. 1 is a partially cutaway perspective view of an illuminated pushbutton switch as an embodiment of the present invention in an assembled state, and FIG. 2 is an exploded view of the arrangement of parts of the pushbutton switch of FIG. 1. .

FIG. 3 is an enlarged partial view showing essential parts of the pushbutton switch shown in FIGS. 1 and 2. FIG.

In these figures, reference number 19 is a main body case having a hollow box shape, and has springs 20 . 20' is attached.

43 is a switch fixing frame that is approximately U-shaped, and the upper surface thereof has a pin fixing groove 44 arranged in a U-shape. 4
4' and a flat groove 47 are provided, and the pin fixing groove 44
．． 44' is a lock pin 32 and a control pin 33 made of elastic thin wire, and the bent ends 34 and 35 of each are pin fixing grooves 44 and pin fixing holes provided at one end of 44'. 45, 45', and the lock pin 32 and control pin 33 extending from the pin fixing groove 44, 44' fit into the flat groove 47, and the tip 37 of the lock pin 32 and the control pin 33 are inserted into the flat groove 47. The tip 38 of the control pin 33 protrudes into a notch 50 provided at one end of the flat groove 47, and the curved portion 36 provided in a portion of the control pin 33 presses against the lock pin 32 against the spring force. (See Figure 3).

The switch operation lever 55 has a substantially plate-like shape, is bent in the shape of a square in the center, and has rotating shafts 56 on both sides of one end. 56', the opposite end has an engaging portion 59 with curved corners, and a hole 57 in the center for attaching a coiled spring 60.

This switch operating lever 55 is attached to its rotating shaft 56 at a support portion (not shown) provided inside the switch fixing frame 43.
56', a coiled spring 60 as a deflection member is interposed between the central hole 57 and the small hole 46 provided directly below the flat groove 47 of the switch fixing frame 43, and the switch operating lever 55 is inserted upward. It is supported inside the switch fixing frame 43 so that it can be lifted up.

Reference numeral 26 denotes a substantially flat presser plate, and has a fixing column 28, 28' formed into a thin oval shape on the upper surface to have elasticity.
Engagement grooves 30 and 30' are provided on both sides of the lower surface, and on one side of the flat plate surface there is a sliding frame 29 extending in a direction perpendicular to the surface, and on one side opposite to this, there is a cradle 27 projecting upward. There is.

This holding plate 26 has engaging grooves 3 provided on both sides of its lower surface.
0 and 30' and protruding strips 49 and 49' provided on both sides of the upper surface of the switch fixing frame 43 are fitted together and fixed to the upper part of the switch fixing frame 43.

The lower surface of the presser plate 26 is connected to a pin fixing groove 44 arranged on the upper surface of the switch fixing frame 43. Cover the top surface of 44',
The lock pin 32 and the control pin 33 are fixed within the flat groove 47 so as to be movable only in the horizontal direction.

Further, the sliding frame 29 provided on one side of the holding plate 26 forms a sliding groove 31 in alignment with a notch 50 provided at one end of the flat groove 47 of the switch fixing frame 43.

This sliding groove 31 has a pressing portion 7 whose lower side is bent into an L-shape.
3, and an operation plate 23 having a hooking protrusion 24 on the upper side and a cam groove as described later on the inner surface, and a tip 37 of the lock pin 32 and a tip 38 of the control pin 33 as shown in FIG. The pressing part 73 at the bottom of the operation plate 23 comes into contact with the engaging part 59 of the switch operation lever 55 supported within the switch fixing frame 43, and the operation plate 23 does not operate the switch. While pressing the lever 55, it is possible to freely slide up and down within the sliding groove 31.

Furthermore, inside the switch fixing frame 43, two microswitches 52 and 52' are provided with the button portions 54 and 52'. 54'
The switch fixing frame 43 is fitted into the hole 21.21' provided at the bottom of the main body case 19 below the main body case 19, and the switch fixing frame 43 is fitted into the hole 21. Holes 51 and 51' at the bottom of both sides of the frame 43 and holes 53 and 53 of the micro switch
' through a fixing pin 22.22'.

The side contact 41 and the bottom contact 39 are attached to the switch fixing frame 43
Grooves 48 on both outer surfaces of. Located at 48', main case 1
It is sandwiched and fixed between the inner wall of 9 and the switch fixing frame 43.

Reference numeral 4 denotes an operation frame having a substantially frame-like or rectangular shape; the upper inner groove 5 houses the name plate 3; the upper surface is covered with the color cap 1 in the outer groove 7; The protrusion 8 protruding from the collar cap 1 is fitted into the hole 2 of the collar cap 1.

The lower part of the operating frame 4 has an operating shaft 9 and spring legs 6, 6' that support a lamp holder 12, which will be described later.

The lamp holder 12 has a hole 1 in the center for inserting the lamp.
5, and around the connecting groove 16, a groove 17 through which the operating shaft 9 of the operating frame 4 passes, a support groove 13.13' into which the spring legs 6, 6' are fitted, and a fixing stage 14.14'. In the lamp hole 15 and the connection groove 16, there is a U-shaped connection fitting 18 with one side connected to the lamp hole 15 and the other side connected to the connection groove 1.
6, and when the lamp 11 is inserted into the lamp hole 15, the side poles of the lamp 11 come into contact with the connecting fitting 18.

The spring legs 6, 6' of the operating frame 4 are inserted into the clamping grooves 13, 13' of the lamp holder 12, and the operating shaft 9 is inserted into the passage groove 17, so that the operating frame 4 and the lamp holder 12 are fitted together. ing.

The operation frame 4 and the lamp holder 12 can slide against each other within a certain distance.

Such a complex of the operation frame 4 and the lamp holder 12 is
When inserted from above the main body case 19, the lamp holder 1
The elastic fixing columns 28, 28' of the presser plate 26 are fitted into and fixed to the second fixing step 14, 14' against the elasticity of the retaining plate 26.

At this time, the side contact 41 is connected to one pole of the lamp 11 by inserting its contact portion 42 into the connection groove 16 of the lamp holder 12 and connecting it to the connection fitting 18 installed therein, and connecting the side contact 41 to one pole of the lamp 11. , the bottom connector 39 is connected to the other pole of the bottom of the lamp 11 through its contact portion 40 .

Further, the operating shaft 9 has a hooking protrusion 24 on the upper side of the insertion plate 23 fitted into the recess 10 at the lower end thereof due to the elasticity of the operating shaft 9.

The operation frame 4 incorporated in this manner can freely slide upward and downward within the main body case 19, and by pushing the top surface of the color cap 1 fitted into the operation frame 4, the operation frame 4 can be moved downward. When sliding, the operation shaft 9 of the operation frame 4 touches the operation plate 23.
Then, the pressing part 73 of the operation plate 23 rotates the switch operation lever 55 downward, and the central lower part 58 of the switch operation lever 55 causes the microswitch 52 . 52
button part 54 of '. 54' is operated (see Figure 3).

The operating principle of the illuminated pushbutton switch as described above will be explained below with particular reference to FIGS. 3 and 4.

Before explaining the operation, the cam groove formed on the vertical inner surface of the operation plate 23 will be explained.

As best shown in FIG. 3, the cam groove consists of a control cam groove 63 and a lock cam groove 62. The control cam groove 63 has a lower proximal wall 66 whose lower part is close to the lock cam groove 62, and is continuous with the lower proximal wall 66 in the direction away from the lock cam groove 62. sloped wall 65
and a vertical wall 64 located continuously above this.

As described above, when the lock pin 32 and the control pin 33 are installed in the flat groove 47 of the switch fixing frame 43,
7 such that one end of the pin securing groove 44,44' facing the pin securing groove 44. 44' are arranged in a V-shape, and due to their inclination, a spring force is applied to the lock pin 32 in the direction of arrow A, and a spring force is applied to the control pin 33 in the direction of arrow B. The pins 33 are pressed against each other at a curved portion 36 provided in a portion of the pin 33 against a spring force.

Tip 37 of lock pin 32 and tip 3 of control pin 33
8 protrudes into the cam groove but does not come into contact with the bottom surface of the cam groove.

At this time, the tip 38 of the control pin 33 is located in contact with the lower adjacent wall 66 of the control cam groove 63, and in this position, the spring force of the control pin 33 in the direction of arrow B is greater than the spring force of the lock pin 32 in the direction of arrow A. By keeping the lock pin 32 in place, the position of the lock pin 32 is controlled by the curved portion 36 of the control pin 33, and the tip 37 of the lock pin 32 is located slightly to the left below the lower end 70 of the hemi-shaped island portion 67, as shown in FIG. A
The initial state is shown in .

From this initial state, by applying force in a direction to push down the upper surface of the collar cap 1 on the upper part of the main body case 19, the operating frame 4 is lowered and the operating plate 23 is pushed down.

As a result, the tip 37 of the locking pin 32 forms a heart-shaped island 6.
Due to the cam action of the curved wall 69 on the left side of 7, the curved wall 69 is relatively raised.

Then, the tip end 38 of the control pin 33 moves up the inclined wall 65 relatively due to the cam action of the inclined wall 65 of the control force groove 63, and the curved portion 36 of the control pin 33
2, the lock pin 32 is released from control by the control pin 33 and is free to move horizontally.

By further pushing down the operation plate 23, the fourth
As shown in FIG. B, the tip 37 of the lock pin 32 passes over the upper left protrusion 68 of the heart-shaped island 67 and comes into contact with the side wall of the chevron-shaped island 61 due to its own spring force in the direction of arrow A.

The tip 38 of the control pin 33 is connected to the vertical wall 6 above the inclined wall 65.
4, and its curved portion 36 is located at a location well separated from the locking pin 32.

At this time, the suppressing part 73 of the operation plate 23 rotates the switch operation lever downward against the restoring force of the winding spring 60, and the central lower part 58 pushes the button 54, 54' of the micro switch 52, 52' to switch the switch. Activate the contact and microswitch 52. 52' is turned on.

Next, by releasing the force pushing down the top surface of the collar cap 1, the switch operating lever 55 begins to rotate upward due to the restoring force of the coiled spring 60, and is operated by the engaging portion 59 of the switch operating lever 55. The plate 23 begins to be pushed back upwards, but soon the tip 37 of the locking pin 32 crosses the lower end of the chevron island portion 61 due to its own spring force in the direction of arrow A, as shown in FIG.
Due to the cam action of 1, the heart-shaped island portion 67 comes into contact with the side wall of the upper right protrusion 71 and cannot be lowered any further, and the operation plate 2
3 to stop the upward movement of the switch operation lever 55.
Microswitches 52 .
The on state of 52' is maintained.

Next, by again applying force in the direction of pushing down the collar cap 1 from the top surface, the tip 37 of the locking pin 32 is moved to the heart by the cam action of the protrusion 71 and its own spring force in the direction of arrow A, as shown in FIG. 4D. It passes over the upper right protrusion 71 of the shaped island portion 67 and enters the vertical groove 72.

At this time, the tip 38 of the control pin 33 is still located on the vertical wall 64 of the control cam groove 63, and the curved portion 36 is not in contact with the lock pin 32 even in this state.

Therefore, after that, by releasing the force pushing down the top surface of the collar cap 1, the switch operating lever 55 rotates upward by the restoring force of the coiled spring 60, and its engaging portion 59 pushes the operating plate 23 back upwards. At this time, the tip 37 of the lock bin 32 moves relatively downward within the vertical groove 72.

At the same time, the tip end 38 of the control pin 33 also relatively descends from the vertical wall 64 of the control cam groove 63 along the inclined wall 65, and in the middle of this, the curved part 36 of the control pin 33 comes into pressure contact with the lock pin 32, and the arrow The spring force in direction B is the lock pin 3.
Overcoming the spring force in the direction of arrow A of 2, the lock pin 32
This applies a force in the direction of arrow B to the lock pin 3.
When the tip 37 of the lock pin 32 descends to just below the lower end 70 of the heart-shaped island 67, the lock pin 32 is pushed back in the direction of arrow B and returns to its initial state as shown in FIG. 4A.

At the same time, the switch operation lever 55 rotates upward and returns to the uppermost position, and the micro switch 58 at the lower center 58
．． The pressure on the buttons 54 and 54' of 52' is released, and the microswitches 52 and 52' are turned off.

Therefore, when the above-described series of operations is repeated, the tip 37 of the lock pin 32 rotates in a fixed direction within the lock cam groove 62, causing the illuminated pushbutton switch of this embodiment to perform a so-called alternate operation. be able to.

As described above, the push button device according to the present invention is movable only in the horizontal direction, and in a predetermined direction and
By providing a lock pin 32 to which a spring force of a predetermined strength is applied, and a control pin 33 to control this movement,
The lock pin 32 moves within the lock cam groove 62 by its own spring force and in its final position the control pin 33
By controlling the position of the lock pin 32, the lock pin 32 rotates in a fixed direction within the lock cam groove 62, so there is no need to provide a step on the bottom of the cam groove as in conventional devices. , there is no need for the lock pin to press against the bottom surface of the cam groove to slide, and the amount of deviation of the lock pin is small, so the contact pressure between the lock pin and the cam surface can be kept low, making it difficult for wear to occur. The so-called alternate operation of the switch has the great advantage of providing stable and crisp operation over a long period of time.

In addition, the lock pin is located perpendicular to the cam groove surface, so there is no need for complicated machining of the lock pin, and by simply inserting the lock pin into the groove, the desired spring force can be applied to the lock pin to frame the lock pin. Because it can be fixed to the body,
It has the advantage that the space inside the pushbutton switch can be used effectively, it can be made compact, and assembly work can be easily performed.

The strength of the spring force of the lock pin 32 in the direction of arrow A and the strength of the spring force of the control pin 33 in the direction of arrow B depend on the materials of each pin and the relative relationship between the cam groove and the pin fixing grooves 44, 44'. positional relationship, pin fixing groove 44. Various values can be selected depending on the degree of inclination of 44'.

[Brief explanation of the drawing]

FIG. 1 of the accompanying drawings is a partially cutaway perspective view of an illuminated pushbutton switch as an embodiment of the present invention, FIG. 2 is an exploded parts arrangement diagram of the pushbutton switch of FIG. 1, and FIG. Figure 4 is an enlarged partial view showing the main parts of the push button switch shown in Figure 1.
FIG. 3 is a schematic diagram for explaining the operation of the pushbutton switch shown in the figure. 1... Color cap, 4... Operation frame, 19... Body case, 23... Operation board, 32... Lock pin, 33 ...Control pin, 43...Switch fixing frame, 52.
52'...Micro switch, 55...
Switch operation lever, 60... Winding spring, 61.
...Yamagata Shimabe, 62...Lock cam groove,
63... Control cam groove, 64... Vertical wall, 65... Inclined wall, 66... Lower adjacent wall, 67... Heart Katashimabe.

Claims (1)

[Scope of utility model registration request] The main body case, a fixed frame provided inside the main body case in which a switch contact is installed, and a push button between an inoperative position in which the switch contact is not activated and an activated position in which the switch contact is activated, are pressed against the fixed frame by operating a push button. an operating plate that moves in a substantially vertical direction, and the fixed frame includes a deflecting member that permanently shifts the operating plate to the non-operating position, and a spring-like member that extends in a substantially horizontal direction. A control pin and a lock pin are provided, and a lock cam groove having a chevron-shaped island portion and a heart-shaped island portion on the upper and lower portions, which exert a cam action on the lock pin, is provided on the vertical inner surface of the operation plate; A control cam groove having an inclined wall inclined in a direction away from the lock cam groove exerting a cam action on the control pin is formed, and the tip of the control pin protrudes into the control cam groove and The tip of the lock pin protrudes into the lock cam groove, and when the push button is in an inoperative state, the lock pin is pressed by the control pin, and the tip of the lock pin protrudes into the lock cam groove. The position is shifted slightly from the lower end and away from the control cam groove, and when the push button is pressed from this inactive state, the operation plate moves to the operating position against the shifting force of the shifting member. is pressed down to actuate the switch contact, and at this time, the tip of the control pin is deflected to a position where it does not exert any action on the lock pin due to the cam action of the inclined wall, while: The tip of the lock pin receives the cam action of the heart-shaped island portion and the chevron-shaped island portion, and enters between the heart-shaped island portion and the chevron-shaped island portion, thereby locking the operating state, and from this operating state, the push button is pressed again. When you press
The tip of the lock pin is brought out from between the heart-shaped island and the chevron-shaped island under the cam action of the heart-shaped island, and the lock is released, and the operation plate is moved to prevent the displacement of the displacement member. The tip of the control pin is returned to the inoperative position by a force, at which time the tip of the control pin moves down the inclined wall relatively, and the control pin presses against the locking pin to lock the tip of the locking pin into the heart-shaped island. A push-button switch characterized in that the switch returns to the position offset from the lower end of the push-button switch.