JPH0447867Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a type of push switch that is turned on by the first pressing operation and returned to the OFF state by the next pressing operation.

[Technical background of the invention]

There is a type of push switch that switches the contacts by pressing the operating section, and is turned on by the first pressing operation and returned to the OFF state by the next pressing operation.

This type of push switch generally includes a switch case that is a combination of a lower case and an upper case, and a control section that is provided within the switch case so as to be movable up and down, and that is moved downward by the pressing operation of an operating section that protrudes above the switch case. a member, a return spring that presses the movable member upward, a contact that is switched by the vertical movement of the movable member, and a base end supported on the bottom plate of the switch case and swings about the base end. a U-shaped lock pin; a locking portion formed on the movable member that abuts the tip of the lock pin from below when the movable member is pressed down; A lock pin guide surface guides the lock pin onto the locking part and releases the tip of the lock pin from the locking part when the next moving member is pressed down; The structure includes a spring member brought into contact with the lock pin guide surface.

Figures 1 and 2 show a conventional push switch. In the figure, 1 is a switch case made of synthetic resin. This switch case 1 consists of a lower case 1a and an upper case 1b as shown in Figure 3. It is composed of a combination of. Note that the lower case 1a and the upper case 1b are coupled by engaging downwardly extending latching pieces 2 formed on both sides of the upper casing 1b to latching protrusions 3 formed on the lower casing 1a. It's becoming like that.

In addition, in Figures 2 and 3, 4, 5, 6
are three contacts arranged vertically on both inner surfaces of the lower case 1a, the middle contact 5 is a common contact, and the terminal portions of these three contacts 4, 5, and 6 are 4a, 5a, and 6a each protrude from the lower surface of the lower case 1a.

On the other hand, in FIGS. 1 and 2, reference numeral 7 denotes a synthetic resin moving member provided in the switch case 1 so as to be able to move up and down. It is pushed down by pressing the portion 7a, and is returned to its original position by the pressing force of a return spring (coil spring) 8. Reference numerals 9, 9 are brushes attached to both sides of the movable member 7, and these brushes 9, 9 are moved up and down together with the movable member 7, and when the movable member 7 is in the depressed state, the brushes 9, 9 are in the second position. As shown in the figure, the middle common contact 5 and the lower contact 6 are short-circuited, and when the moving member 7 is in the return state, the common contact 6 and the upper contact 4 are short-circuited.

Further, in FIGS. 1 and 2, 10 is a lock pin that locks the movable member 7 in a depressed state; 11 and 12 are a lock pin engaging portion and a lock pin guide surface formed on one side of the movable member 7; Reference numeral 13 denotes a spring member that brings the tip of the lock pin 10 into contact with the lock pin guide surface 12 of the moving member 7, and the lock pin 10 has a vertically long U-shape formed by bending a metal wire.

The U-shaped lock pin 10 has its base end bent by inserting it into a tapered horizontal hole 15 formed in a lock pin support part 14 formed on the bottom plate of the lower case 1a. It is supported by the lock pin support portion 14 so as to be able to swing back and forth, left and right around the center.

Further, as shown in FIG. 4, the spring member 13 has a shape in which the tip of a metal plate is bent upward to form a spring portion 13a. The flat plate portion 13b is supported on the bottom plate of the lower case 1a, and the spring portion 13a is provided to press approximately the center portion of the lock pin 10 from behind. Note that this spring member 13 has a through hole 13 provided in its flat plate portion 13b.
c and 13d are fitted into the return spring fitting shaft 8a protruding from the bottom plate of the lower case 1a and the lock pin support portion 14, and are pressed and fixed to the bottom surface of the lower case by the return spring 8.

On the other hand, the lock pin engaging portion 11 is provided to protrude from a vertical wall formed on one side of the moving member 7, and its upper surface is recessed to receive the bent portion at the tip of the lock pin 10. . Further, the lock pin guide surface 12 is formed on the vertical wall surface of the moving member 7 so as to surround the lock pin engaging portion 11.
2 is formed in a step-like manner along the movement path of the tip of the lock pin. That is, the lock pin guide surfaces 12 are arranged in the directions a, b, c, d, as shown in FIG.
It consists of seven planes, e, f, and g, with the c-plane being the highest, followed by the d-plane, e-plane, f-plane, and g-plane, which are the lowest in that order, and the a-plane being the lowest. Also,
The b-plane is an inclined plane that becomes higher from the a-plane toward the c-plane.

The distal end of the lock pin 10, which is constantly in contact with the lock pin guide surface 12 due to the elasticity of the spring member 13, is connected to the moving member 7.
As the spring 8 is pushed down, the spring 8 is displaced in a trajectory shown by arrow A shown in FIG.
When the movable member 7 rises to a certain extent due to the spring force, the movable member 7 comes into contact with the lock pin engaging portion 11 as shown in the figure to prevent the movable member 7 from rising any further. When the movable member 7 is pushed down again, the tip of the lock pin 10 is displaced from the e-plane to the f-plane, releasing the movable member 7, and as the movable member 7 is returned by the return spring 8, the It is designed to return to the a-plane while being displaced along a trajectory like arrow B shown in Figure 2.

[Problems with background technology]

However, in the above-mentioned conventional push switch, the spring member 13 that brings the lock pin 10 into contact with the lock pin guide surface 12 of the moving member 7 is pressed and fixed by the return spring 8 with its flat plate portion 13b supported on the bottom surface of the lower case 1a. Therefore, when assembling the switch, the lock pin 10 must be attached after the spring member 13 is assembled, which makes assembly of the switch very troublesome.

That is, since the lock pin 10 is installed by inserting the bent portion of its proximal end into the horizontal hole 15 of the lock pin support portion 14 formed on the bottom surface of the lower case 1a, the spring member 13 is attached. In order to assemble the lock pin 10 later, the base end of the lock pin must be inserted into the horizontal hole 15 of the lock pin support part 14 while pushing the spring part 13a of the spring member 13 outward so as not to interfere with the installation of the lock pin. First, this operation must be carried out with a tool such as tweezers in both hands, and the spring portion 13a of the spring member 13 must be carefully pressed with moderate force to avoid permanently deforming it. Since it has to be pushed outward, the smaller the switch, the more the lock pin 1
0 became very difficult to install, and as a result, it was not possible to assemble the switch with good work efficiency.

[Purpose of invention]

This idea was devised in view of the above-mentioned circumstances, and its purpose is to create an assembly method that allows the locking pin to be installed easily and with good workability without the spring member getting in the way. The purpose is to provide an easy push switch.

[Summary of the idea]

That is, in this invention, a lock pin mounting opening is formed on the side surface of the lower case of the switch case opposite to the lock pin mounting portion, and openings are formed inside both side edges of the lock pin mounting opening at the upper end of the lower case. A metal plate having a structure provided with a guide groove for attaching a spring member, and having both sides slidably fit into the guide groove for attaching the spring member on both sides of the lower case so that the spring member that presses the lock pin from behind is fitted. The spring piece is cut and bent to make elastic contact with the lock pin, and the spring piece is inserted into the lock pin installation opening and is placed behind the lock pin and guided through the spring member installation guide groove to the upper part of the lower case. In addition to installing the spring member inserted from the switch case, the opening for attaching the lock pin in the lower case is covered with a cover plate formed in the upper case of the switch case.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 5 to 10. In the figures, components corresponding to those of the conventional push switch described above are given the same reference numerals, and descriptions of the same components as those of the conventional push switch will be omitted.

As shown in FIGS. 5 and 6, the push switch of this embodiment has a spring member 20 vertically disposed behind the lock pin 10 to press the lock pin 10 toward the moving member 7. Lower case 1a shaped as shown in Fig. 7
and an upper case 1b.

The lower case 1a has a wide lock pin mounting opening 21a that opens at the upper end of the lower case on the side surface facing the mounting portion of the lock pin 10,
The lock pin mounting opening 21a is provided on the opposite side surface.
The upper case 1b has a structure in which a return spring mounting opening 22a of the same shape is formed, and the upper case 1b has a cover plate 21b on both sides thereof that covers the lock pin mounting opening 21a and the return spring mounting opening 22a of the lower case 1a. , 22b extending downward. The lower case 1a and the upper case 1b are connected to the cover plate 21b,
Latching pieces 23, 23 protruding from both sides of the lower edge of 22b
are hooked onto hooks 24, 24 formed on the lower case 1a and assembled together.

Further, vertical spring member mounting guide grooves 25, 25 are formed in the lower case 1a on the inside of both side edges of the lock pin mounting opening 21a, respectively, and open to the upper end of the lower case 1a.

On the other hand, as shown in FIG. 8, the spring member 20 that presses the lock pin 10 from behind toward the movable member 7 has both side edges bent at approximately right angles to reinforce both side edges. Guide grooves 25, 25 for mounting spring members on both sides of the lower case 1a
A spring piece 20a that comes into elastic contact with the lock pin 10 is cut and raised in the center of a metal plate that is slidably fitted into the metal plate.The tip edge of the spring piece 20a that comes into contact with the lock pin 10 is ,
When the movable member 7 is pushed down and the pressing force is released, the tip of the lock pin touches the lock pin guide surface 12.
In order to prevent the switch from returning to its original position after passing through the plane F, the tip of the lock pin should be
It is inclined so as to push in the lateral direction toward the step between the plane and the d plane.

In addition, in this embodiment, the contacts 4, 5, and 6 disposed on both inner surfaces of the lower case 1a are arranged such that the two selection contacts 4 and 6 are arranged vertically, and the common contact 5 is placed on the side thereof, and a brush 26 having a shape as shown in FIG. 9 is used to switch the contacts.

FIG. 10 shows the push switch of this embodiment in the middle of being assembled, with the lock pin 10
The return spring 8 and the moving member 7 are attached to the lower case 1a.
is inserted into the lower case 1a from the lock pin attachment opening 21a of the lower case 1a,
The proximal end thereof is inserted into the horizontal hole 15 of the lock pin support part 14, and the distal end part is engaged with the recess of the lock pin engaging part 11 of the movable member 7 to be mounted. A spring member 20 that presses the lock pin 10
After the lock pin 10 is installed, it is guided by the spring member installation guide grooves 25, 25 and inserted behind the lock pin 10 from above the lower case 1a.

That is, in this push switch, after the return spring 8 and the moving member 7 are assembled into the lower case 1a, the lock pin 10 is inserted into the lower case 1a through the lock pin attachment opening 21a formed on the side surface of the lower case 1a. After the lock pin 10 is installed, the spring member 2 that presses the lock pin 10
0 into the lock pin attachment opening 2 of the lower case 1a.
The lower case 1a and the upper case 1b are combined, and the lock pin mounting opening 21a of the lower case 1a is inserted into the upper part. It is assembled by covering it with a cover plate 21b formed on the case 1b.

Therefore, according to this pushy switch,
Since the lock pin 10 can be installed easily and efficiently from the side of the lower case 1a without the spring member 20 getting in the way, the switch can be assembled more easily than conventional push switches. can.

[Effect of idea]

The push switch of this invention has a lock pin layer mounting opening formed on the side surface of the lower case, so that the lock pin can be inserted into the lower case from the side surface of the lower case after the return spring and moving member are assembled in the lower case. At the same time, a spring member for pressing the lock pin from behind is inserted from above the lower case behind the lock pin that is inserted through the lock pin mounting opening and guided by the spring member mounting guide groove. Since the opening for installing the lock pin in the lower case is covered with a cover plate formed in the upper case, the lock pin can be installed easily and easily from the side of the lower case without the spring member getting in the way. Therefore, the switch can be easily assembled.

[Brief explanation of drawings]

Figures 1 to 4 show a conventional push switch. Figures 1 and 2 are a vertical side view and front view of the push switch, Figure 3 is an exploded perspective view of the switch case, and Figure 4 is an exploded perspective view of the switch case. FIG. 3 is a perspective view of a spring member for pressing the lock pin. Figures 5 to 10 show an embodiment of this invention, with Figures 5 and 6 being a vertical side view and a front view of the push switch, Figure 7 being an exploded perspective view of the switch case, and Figure 7 being an exploded perspective view of the switch case. FIG. 8 is a perspective view of the spring member for pressing the lock pin, FIG. 9 is a perspective view of the brush, and FIG. 10 is a longitudinal sectional side view showing the push switch in the middle of being assembled. 1...Switch case, 1a...Lower case,
1b... Upper case, 4, 5, 6... Contact, 7...
. . . Moving member, 8 . 22a...
...Opening for attaching return spring, 21b, 22b...Cover plate, 25...Guide groove for attaching spring member, 26...
…brush.

Claims (1)

[Scope of utility model registration request] A switch case that is a combination of a lower case and an upper case, a movable member that is provided in the switch case so as to be movable up and down and is pushed down by a pressing operation of an operating section that protrudes above the switch case, and a movable member that is moved upwardly. a return spring that presses the switch; a contact that is switched by the vertical movement of the movable member; a U-shaped lock pin whose base end is supported on the bottom plate of the switch case and swings about the base end; and the movable member. a locking portion formed on the movable member that abuts the tip of the lock pin from below when the movable member is pressed down; and a locking portion formed on the movable member that guides the tip of the lock pin onto the locking portion when the movable member is first depressed and a lock pin guide surface that releases the tip of the lock pin from the locking portion when the movable member is pressed down; and a spring member that presses the lock pin from behind toward the movable member to bring the lock pin tip into contact with the lock pin guide surface of the movable member. In a push switch comprising:
A lock pin mounting opening is formed in the lower case of the switch case on the side surface facing the lock pin mounting portion, and a spring member is mounted on the inside of both side edges of the lock pin mounting opening, which are opened at the upper end of the lower case. The structure includes a guide groove, and the spring member that presses the lock pin from behind is attached to a metal plate whose both sides slidably fit into the spring member attachment guide grooves on both sides of the lower case. The spring piece is cut and bent to make elastic contact with the spring member, and is inserted from above the lower case by being guided by the spring member mounting guide groove behind the lock pin that is inserted and mounted from the lock pin mounting opening. A push switch characterized in that the spring member is installed in the push switch case, and the opening for attaching the lock pin in the lower case is covered with a cover plate formed in the upper case of the switch case.