JPH0314751Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Target Technical Field" This invention relates to a press switch that converts the movement of a plunger into a tilting movement of a lever to operate a switching mechanism.

"Prior art and its problems" Conventionally, this type of push switch is shown in Figures 8 to 1.
As shown in Figure 1, a small snap switch 80,
A reversing lever mechanism is constituted by an operating lever and an operating lever 33 connected to this lever via a coil spring 43 on the upper part of the reversing lever 80, and this reversing lever mechanism is further operated by a plunger 65. . and operation lever 3
3 has engaging protrusions 41, 41 protrudingly provided, while the legs 71, 71 of the plunger 65 are provided with inclined surfaces 79, 79 at their lower ends so as to face each other, and the legs 71, 71 are provided with engaging protrusions. Engagement holes 70, 70 for engaging the children 41, 41 are provided, and the plunger 6
5 and the operating lever 33 are connected by engaging protrusions 41, 4.
1 is slid against the elasticity of the legs 71, 71 and along the inclined surfaces 79, 79, and when the engaging projections and the holes 70, 70 are aligned, both legs 71, 71 are slid.
Although it is adapted to engage due to the elasticity of 71,
Since both the operating lever 33 and the plunger 65 are housed in the housing 51, when uncoupling them, it is difficult to remove the plunger 65 by simply pulling it out from the operating lever 33.
The drawback was that the workability was poor. Also, the engagement hole 7
0 and 70 require a sufficient margin for the engagement protrusions 41 and 41, so there is a large gap, so when the plunger 65 is released from the pressed state, the biasing force of the coil spring 43 is particularly large. An ironic phenomenon occurs in which the plunger 65 is disengaged from the operating lever 33 and jumped out of the housing 51 due to the reversing action of the operating lever 27.

``Purpose'' This idea was created in consideration of the drawbacks of the conventional method.
The purpose is to facilitate attachment and detachment of the plunger to and from the operating lever, and to ensure that the connected state is maintained, thereby preventing the plunger from jumping out of the housing when the switch is operated.

``Example'' An example of this invention will be described below with reference to the drawings.

That is, in Figures 1 to 5, base 1
is composed of a support base 2 and terminal bases 3, 3, and the support base 2 is formed with a step-like slope 5 whose height gradually increases from one end to the other end above the support base 2. A support portion 7 is provided projecting above the slope 5.

Further, a common terminal 12 and a pair of fixed terminals 13 and 14 are integrally molded on the terminal base 3, and the common terminal 12 is located on one end side of the terminal base 3, and the fixed terminals 13 and 14 are located on one end side of the terminal base 3. It is located at the other end. Further, the fixed terminals 13 and 14 are provided with fixed contacts 16 and 17, respectively. The movable contact 21 is composed of an elastic plate-like body, and has a bent end 2 at one end.
5 is formed, and this bent end is connected to the common terminal 1.
2, thereby forming a pivot point.
Furthermore, the free end of the movable contact 21 is connected to the fixed terminal 1.
3, 14 and has a fixed contact 1 at its free end.
A movable contact 26 is provided which selectively contacts 6 and 17. One end of an operating lever 27 is connected to one end of the movable contact 21, and its free end extends parallel to the movable contact 21. In this embodiment, the operating lever 27 and the movable contact 21 are integrally molded, and the bent end 25 of the movable contact 21 protrudes from the connecting portion 28 of the operating lever 27. When the bent end 25 of the movable contact 21 is engaged with the common terminal 12, the free end of the operating lever 27 extends from one end of the base 1 to the other end.

Further, one end of an operating lever 33 is engaged with the other end of the base 1, that is, the support portion 7, and is rotatable. A tongue piece 35 is integrally formed on the free end of this operating lever toward the base 1. A coil spring 43 is provided between the operating lever 33 and the operating lever 27, thereby biasing the free end of the operating lever 27 and the free end of the operating lever 33 in a direction away from each other. Further, a pair of engaging protrusions 10, 10 are provided on the outer periphery of the base 1, that is, on the outer peripheries of the terminal bases 3, 3, respectively.

And the switch assembly 50 is a housing 51
be accommodated in. The lower end of this housing 51 is provided with engagement holes 52, 52 that engage with the engagement protrusions 10, 10. are inserted into the housing 51 from below and engaged with each other, whereby the switch assembly 5
0 is fixed to the housing 51.

Further, engagement pins 41, 41 are provided protruding from both sides of the middle portion of the operating lever 33. A light emitting element unit 55 is housed within the housing 51 and is held by the housing 51. This light emitting element unit includes a socket 57 provided on a printed circuit board 56, a light emitting element 58 attached to this socket, such as a light emitting diode, resistors 59, 59, and terminal pieces 60, 6 fixed to the printed circuit board 56.
It is composed of 0.

A plunger 65 for operating the operating lever 33 has a hole 66 passing through the light emitting element 58 and a reflecting wall 67 for reflecting light from the light emitting element 58.
A push button 69 is fitted into one end of the collar plate 68 via a collar plate 68 . A pair of legs 71, 71 extend from the other end of the plunger 65, and an engagement recess 72, which engages with the engagement pins 41, 41, is provided at the end thereof.
72 are provided. This engagement recess is formed by a non-circular hole 73 and a notch 74 formed from the end of the leg 71 so as to be continuous with the hole 73. The hole 73 has a triangular shape in this embodiment, and the notch 74 is provided with a first inclined portion 75 on the end side of the leg 71 and having a relatively narrow angle θ ₁ that widens outward. , and a second inclined portion 76 which widens toward the hole 73 and has a wider angle θ ₂ than the first inclined portion 75 is provided. A clamping portion 77 is formed at the lower end of each leg 71 by the engagement recess 72 . In addition, on the free end side of the leg 71, a notch recess 78 is formed on both side edges of the leg 71.
78 is provided adjacent to the recess 72, thereby imparting elasticity to the clamping portions 77,77.

Note that the power supply terminal pieces 81, 81 have one end inserted through the holes 82, 82 of the support base 2, and the other ends are in electrical contact with the terminal pieces 60, 60.

"Operation" Next, the assembly operation in the above configuration, particularly the assembly of the switch assembly 50 and the plunger 65, will be explained.

First, with the switch assembly 50 housed and fixed at one end of the housing 51, that is, the lower end side in the figure, the legs 71, 71 of the plunger 65 are inserted from the other end of the housing 51, that is, the upper side in the figure, and the first inclined Engagement pin 41 on surface 75,
Match 41. When the plunger 65 is pressed against the engagement pin in this state, the engagement pin 41 moves along the first inclined surface 75 toward the other end of the legs 71, 71, and the clamping portion 77, When the engagement pin 41 moves while expanding outward and continues to press, the engagement pin 41 engages with the hole 73 as shown in FIG.
3. In this state, the engagement pin 41 is inserted into the hole 73 with respect to the leg 71 as shown in FIG.
They are in contact at three points A, B, and C within. Further, in this state, the inclination angle θ ₂ of the second inclined surface 76
is set smaller than the inclination angle θ ₁ of the first inclined surface 75, so the engagement pin 41 does not easily come off from the plunger 65.

FIG. 2 shows the illuminated pushbutton switch assembled in this manner.

Next, in order to remove the plunger 65 from the housing 51, pull the plunger 65 with a force greater than the force required to connect it with the engagement pin 41, thereby removing the engagement pin 41 from the second While sliding on the inclined surface 76, the gripping parts 77, 77 are spread and further pulled, so that the engaging pin 41 is moved to the first position.
It slides on the inclined surface 75 of and separates from the legs 71, 71, resulting in the state shown in FIG.

"Effect" As described above, this invention has a non-circular hole 73 having an approximately triangular shape in the engagement recess 72, and legs 71, 71.
A notch 74 is formed so as to be continuous with the hole 73 from the end of the hole 73, and in this notch, the clamping portions 77, 77 have a first inclined portion 75 that widens toward the outside, and a hole. 73, a second inclined part 76 that widens laterally is provided, and the angle θ ₂ of this second inclined part is larger than the angle θ ₁ of the first inclined part 75, that is, the first inclined part 75 Since the angle θ ₁ of the second inclined portion 76 is smaller than the angle θ ₂ of the second inclined portion 76, the engagement of the engagement pin 41 with the engagement recess 72 is easy, and since the hole 73 has a substantially triangular shape, the engagement of the engagement pin 41 with the engagement recess 72 is easy. In the engaged state, the engagement pin 41 is supported at three points within the hole 73 and stably held by the second inclined portion.

On the other hand, at the ends of the legs 71, 71, a notch recess 7 is provided on both side edges in proximity to the engagement recess 72.
8 is provided, and the clamping parts 77, 7 are provided with this notch recess.
7 is imparted with elasticity, when the engagement pin 41 is removed from the leg 71, the gripping portion 77 is removed by the action of the notch recess ₇₈ despite the shape of the hole 73 being the second inclined portion θ2. Since it has elasticity, it can be easily removed from the leg 71.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the main parts of the push switch in this invention, Fig. 2 is a side sectional view of the illuminated push switch, Fig. 3 is a front sectional view, Fig. 4 is an exploded perspective view, and Figs. FIG. 7 is a front view showing the connection operation between the engagement pin and the plunger, FIGS. 8 to 10 are front views of a conventional press switch, and FIG. 11 is a perspective view of the plunger. DESCRIPTION OF SYMBOLS 1... Base, 2... Support base, 3... Terminal base, 5... Slope, 7... Support part, 9... Recessed part, 10... Engagement convex part, 12... Common terminal, 13
... fixed terminal, 14 ... fixed terminal, 16 ... fixed contact, 17 ... fixed contact, 21 ... movable contact,
25...Bent end, 26...Movable contact, 27...
... Actuation lever, 28 ... Connection portion, 33 ... Operation lever, 35 ... Tongue piece, 41 ... Engagement pin, 43 ...
... Coil spring, 50 ... Switch assembly, 51 ... Housing, 52 ... Engagement hole, 55
...Light emitting element unit, 56...Printed circuit board, 57...Socket, 58...Light emitting element, 59
... Resistor, 60 ... Terminal piece, 65 ... Plunger, 66 ... Hole, 67 ... Reflection wall, 68 ... Color plate, 69 ... Push button, 71 ... Leg, 7
2... Engagement recess, 73... Hole, 74... Notch, 75... First slope, 76... Second slope, 77... Holding part, 78... Notch recess , 81
...Power supply terminal piece, 82...hole.

Claims (1)

[Scope of utility model registration request] A device comprising an operating lever for operating a switching mechanism and a plunger for operating this operating lever, wherein the plunger is provided with a pair of legs, and an engagement pin provided on the operating lever is accommodated at the end of the leg. an engaging recess is provided, and the recess forms a pair of clamping parts for holding the engaging pin, and at the end of the leg, on both side edges thereof, there is provided an engaging recess adjacent to the engaging recess. A notched recess is provided, and the notched recess imparts elasticity to the clamping part, and the engaging recess is formed with a non-circular hole having a substantially triangular shape, and the end of the leg is connected to the hole. and a notch portion formed in the notch portion, and in the notch portion, the holding portion is provided with a first slope portion that widens toward the outside thereof, and a second slope portion that widens toward the hole side. , a press switch in which the angle of the second inclined part is larger than the angle of the first inclined part.