JPH0429461Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a push-button type interlocking switch for the purpose of preventing simultaneous locking and simultaneous return in double-barreled push-button switches arranged in parallel in a switch housing.

Generally, the blower switch for a car cooler, which is a part of the in-vehicle electrical equipment, is a double push button switch that is opened and closed by a push button, and when one of the switches is pushed, the other one returns.
As a general rule, pressing both at the same time will not lock the lock, and both will not return at the same time.
However, this type of conventional push-button switch
When one push-button switch of a double-barrel type is pushed, the locking of that push-button switch and the other push-button switch is insufficient, and the simultaneous locking strength in this sense is poor, and furthermore, the return spring is It was difficult to assemble because it required
Furthermore, if the pushbutton operation was continued, a malfunction could occur in which both of the double pushbutton switches returned to normal at the same time.

The present invention was developed with the aim of eliminating the drawbacks of conventional push-button interlocking switches. The present invention provides a push button type interlocking switch in which a housing is arranged in parallel with a switch casing, the cam is swingably supported by the housing, and a cross-shaped cam is provided with a locking means.

An embodiment of the present invention will be described below based on the drawings. Fig. 1 is a perspective view showing the assembled configuration of a push button type interlocking switch, in which switch housings 1, 1 connected by a bracket 1a are connected to push rods 2, 2a arranged in parallel in two rows.
are assembled so that they can appear freely. Push rod 2, 2
A push button mounting end is formed at one end of each a, and engagement holes 3 and 3a are formed at each other end. Push rod 2, 2
A has a switch section (not shown) inside the switch casings 1, 1, and is provided with a plurality of conductive terminal sections 4 that are electrically opened and closed. The switch body is composed of the switch casings 1, 1, the push rods 2, 2a, etc.
Then, guide grooves 5, 5 are carved in the push rods 2, 2a so that they can extend and retract from the switch housing 1 in parallel.
The guide grooves 5, 5 engage with guide portions 6, 6 provided on the switch housing 1, and are further provided with guide protrusions 7, 7 on the respective back portions on the side of the engagement holes 3, 3a. A housing 9 is detachably attached to the switch housings 1, 1 via a plurality of engagement protrusions 8, and 10 is an engagement hole that engages with the engagement protrusions 8. 11, 11 of the housing 9, and the housing 9 has the side flap 1 of the lid 10.
It is provided with engagement protrusions 12, 12 that engage with engagement holes 14, 14 formed in 3, 13, and is detachably fitted. Reference numeral 15 denotes an engaging portion of the switch casings 1, 1, which is fitted into the engaging recesses 15a, 15a of the housing 9. Grooves 1 are formed inside the housing 9 in the top plate 16 and the bottom plate 17 facing the rear ends of the push rods 2, 2a.
8 and protrusion 19, a pair of guide grooves 20, 20 provided in the inner bottom (side plate) having a surface facing the lid body 10 and parallel to the moving direction of the push rods 2, 2a, and between the guide grooves 20, 20. It has a shaft hole 21 bored in the center. The guide protrusions 7, 7 of the press rods 2, 2a can be engaged with the guide grooves 20, 20.
On the other hand, the shaft 23 of the cam 22 is inserted into the shaft hole 21 of the housing 9. The cam 22 has a cross shape,
Projections 25, 25 that engage with the engagement holes 3, 3a of the push rods 2, 2a at both ends of the horizontal arm 24, and guide protrusions 26 that engage with the guide grooves 20, 20 of the housing 9 on the back surface thereof. It is equipped with 26. cam 2
A vertical axis (vertical arm) 27 perpendicular to the horizontal arm 24 of No. 2
is a cylindrical body with a hollow interior, and balls 29, 29 are inserted into both ends of a vertical shaft 27 with a spring 28 interposed therein. One of the balls 29 is elastically engaged with a groove 18 provided on the top plate 16 of the housing 9, and the other is engaged with a protrusion 19 provided on the bottom plate 17, respectively.

Note that there are at least two grooves 18 and one protrusion.
The books are formed in the center of the top plate 16 and the bottom plate 17, ie, on the same straight line as the shaft hole 21. One shaft 23a of the cam 22 is inserted into a shaft hole 21a bored approximately at the center of the lid 10.

Next, the operation of the push button type interlock switch will be explained. First, when the press rod 2 is pushed, as shown in FIG. horizontal arm 2 of cam 22 engaging with 3
Press the protrusion 25 at 4. In the horizontal arm 24, the guide protrusion 26 engages with the guide groove 20 of the housing 9, and the guide protrusion 7 of the press rod 2 engages with the guide groove 20, so that the movements of the press rod 2 and the cam 22 are prevented from wobbling. It moves smoothly without any problems. When the horizontal arm 24 tilts, the vertical arm 27 tilts. The vertical arm 27 changes the positions of the balls 29, 29 which are in elastic contact with the top plate 16 and the bottom plate 17, respectively, when the cam 22 swings about the shafts 23, 23a. That is, the ball 29 in elastic contact with the top plate 16 moves from one side of the groove 18 to the other, and the ball 29 in elastic contact with the bottom plate 17 moves from one side of the groove 18 to the other.
9 moves over the protrusion 19 from one side to the other side. The balls 29, 29 are connected to each other by the spring 28.
Since the vertical arm 27 is interposed therebetween, it can freely appear and retract from the vertical arm 27. Therefore, the force of the spring 28 changes the position of the ball 29 in elastic contact with the protrusion 19 and the groove 18, thereby restricting the swinging of the cam 22. When the push rod 2 is pushed, the switch portion closes and becomes energized. By the way, since the balls 29, 29 are provided at both ends of the vertical shaft 27, and the spring 28 is arranged inside the vertical shaft 27, the ball 29 at the other end is brought into elastic contact with the top plate 16, and the ball 29 at one end is brought into elastic contact with the bottom plate 17, respectively. The shafts 23, 23a of the cam 22 are not biased in either direction by their springs 28, and only a small amount of wear occurs on the shafts 23, 23a when the cam 22 rotates. This extends the life of the switch and improves its reliability. On the other hand, in this operation, the push rod 2a pushes the switch casing 1 with the pressing force generated by pushing the push rod 2 through the horizontal arm 24.
When the switch comes out, the switch opens and the electricity is cut off. When the push rod 2a is then pushed, the push rod 2a sinks into the switch housing 1, as shown in FIG. 3, and its engagement hole 3a side pushes the horizontal arm 24, causing the cam 22 to swing. The cam 22 is connected to the shafts 23, 23a
The displacement of the vertical arm 27 causes the ball 29 to return from the other side of the protrusion 19 to the original one side and from the other side of the groove 18 to the original one side. Since the movement of the cam 22 is restrained by the respective displacements of the balls 29 in this manner, the press rods 2 and 2a do not move inadvertently. That is, the cam 22 is in a semi-fixed state.

According to the present invention described above, the switch mechanism of the switch body and the interlocking mechanism consisting of a cam or the like for interlocking the push rod are separate bodies, that is, the interlocking mechanism is provided within the housing. Therefore, after assembling the switch part (contact circuit), which is an important part of the switch body, the interlocking mechanism can be attached, which simplifies assembly and increases reliability. It also becomes possible to support switches other than interlocking.

Further, since a guide groove is provided on the side plate of the housing, and a protrusion that enters the guide groove is provided at the rear of the press rod, the movement of the press rod and the cam can be made smooth.

Furthermore, balls are provided at both ends of the vertical arm, and a spring is placed within the vertical arm to elastically contact the ball at the other end with the top plate of the housing and the ball at one end with the bottom plate of the housing, so that the cam shaft is connected to the spring. It is not biased in either direction by the cam, and as the cam rotates there is little wear on its shaft, thus increasing the life and reliability of the interlock switch.

In addition, the strength of preventing simultaneous locking of the dual push button switch is improved and becomes extremely stable, and erroneous operation of simultaneous return does not occur at all. Furthermore, it goes without saying that a return spring for the press rod is not required, and the structure is simple and there is little difficulty in assembling and manufacturing.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view showing an assembled and disassembled state, and FIGS. 2 and 3 are operation explanatory views. 1... Switch housing, 2, 2a... Push rod, 3,
3a...Engagement hole, 9...Housing, 16...Top plate, 17...Bottom plate, 18...Groove, 19...Protrusion,
21...Shaft hole, 22...Cam, 23, 23a...
Axis, 24...Horizontal arm, 26...Guide protrusion, 27
... Vertical arm, 28 ... Spring, 29 ... Ball.

Claims (1)

[Claims for Utility Model Registration] A pair of switch bodies arranged in parallel, each switch body having a switch housing and a push rod that penetrates the switch housing and is movable in the penetrating direction. Then, a cam is installed to interlock the push rods,
The tip of the push rod is the push button attachment end, and the switch is turned on and off by moving the push rod by operating the push button attached to the tip, and when one of the push rods is pressed, the cam is turned on. A push-button type interlocking switch which is adapted to be rotated to move the other push rod forward, wherein a housing is removably provided in the rear part of both switch housings into which the rear parts of both push rods enter, and the above-mentioned A guide groove along the moving direction of the push rod is provided in a side plate of the housing having a surface parallel to the moving direction of the push button, corresponding to each push rod, and a guide protrusion that engages with the guide groove is provided at the rear of both the push rods. The cam has a horizontal arm, a cylindrical vertical arm perpendicular to the horizontal arm, and a shaft extending in a direction perpendicular to the horizontal arm and the vertical arm, and the cam is arranged such that the shaft is connected to the push rod. The cam is perpendicular to the moving direction and located between both push rods, and is rotatably disposed within the housing with both ends of the shaft pivotally supported by both side plates of the housing, and both ends of the horizontal arm of the cam. A locking portion is provided at the rear of each of the horizontal arms, an engaging portion is provided at the rear of each of the horizontal arms, and the locking portion at one end of the horizontal arm is engaged with the engaging portion at the rear of one of the horizontal arms. A locking portion at the other end is engaged with an engaging portion at the rear of the other press rod, balls are provided at both ends of the vertical arm of the cam, and the ball at one end is connected to the bottom plate of the housing facing the rear end of the press rod. A spring is disposed in the vertical arm to cause the balls at the other end to come into elastic contact with the top plate of the housing, a groove is provided in the top plate to engage with the ball at the other end of the vertical arm, and a spring is provided in the bottom plate to make the vertical arm contact elastically with the top plate of the housing. A push-button interlocking switch characterized by having a protrusion that engages with a ball at one end of the cam to make the cam semi-fixed.