JPH0452902Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a push switch, and more particularly, to a self-resetting push switch that can be assembled without using fastening means such as screws.

[Prior Art] As is well known, switches range from simple on/off switches such as those for power supplies to multi-contact and multi-circuit switches that switch complex circuits in one operation, such as input signal circuits and high frequency circuits. There are even some. The basic structure of a switch is one in which the switch is switched by sliding a contact, and the other in which the switch is switched by moving the contact up or down.

An example of a switch having the latter configuration is a push switch in which a push button is operated in a direction perpendicular to the switch body. This push switch consists of an insulating board that holds a fixed contact, and a movable contact that is attached to the insulating board and comes into contact with or separates from the fixed contact when a push button is pressed. Each of these parts is caulked to the insulating board. Alternatively, a switch is formed by being screwed together.

For example, this type of technology was published by Jikkyo Publishing Co., Ltd. in November 1972.
It is described in the "Illustrated Machine Terminology Dictionary" published in the first edition of the month.

[Problems to be Solved by the Invention] In the above-mentioned prior art, the switch components are assembled by screwing in addition to caulking the switch components to the insulating substrate. Therefore, there is a problem that automatic assembly is difficult and therefore requires manpower, and mass production is not possible, so the manufacturing cost is considerably low and it cannot be supplied.

The purpose of this invention is to automate the assembly by inserting and fixing all the switch components without using fastening means such as screws, and to provide the switch at a low cost.

[Means for Solving the Problems] The object of the invention described above is to provide a push button having a pair of longitudinal grooves in the length direction of an insulating cylindrical body, an elastic member disposed within the push button, A guide piece having a through hole through which the push button passes through, and a guide piece having a plurality of through holes through which the other end divided by the pair of vertical grooves of the push button individually penetrate are provided opposite to the mounting piece. , and a conductive fixed contact structure having a protruding fixed contact, and a protruding piece and a pair inserted into a pair of insertion grooves intersecting the pair of vertical grooves near the end of the push button. This is achieved by each having a movable contact piece that is fixed with a locking hook to prevent it from coming out.

[Operation] The push switch of this invention is inserted and fixed into the push button by the elastic force of an elastic member disposed between one end of the push button and one of a pair of push button guide pieces through which the push button is inserted. The movable contact structure and the push button guide piece forming a part of the fixed contact structure are in contact to form a normally closed contact.

When the push button is pushed against the elastic force of the elastic member, the push button moves toward the other end of the push button through the through holes of the pair of push button guide pieces, and the movable contact structure and the fixed contact structure are separated. Closed contact opens.

When the force applied to the push button is removed, the button will automatically close again due to the elastic force of the elastic member.

[Embodiment] An embodiment of the push switch of this invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the push switch of this invention is composed of a push button 1 made of an insulating material, an elastic member 2 such as a coil spring, a fixed contact structure 3, and a movable contact piece 4. There is.

As shown in FIGS. 1 to 9, the push button 1 is made of synthetic resin and is made by injection molding to form a button head 1 at one end.
A pair of vertical grooves 13 and 14 are formed in the length direction of the push button 1 from the other end of the bottomed cylindrical body 12 which is slightly curved outward so as to form a pair of vertical grooves 13 and 14. A pair of insertion grooves 15 and 16 that intersect the pair of vertically divided grooves 13 and 14 are formed near the other end sides of the grooves 13 and 14,
As an example, the push button has a rectangular tube shape with a bottom, but is not limited to the rectangular tube shape as shown in FIGS. 13 and 14.

As shown in FIG. 1, the fixed contact structure 3 is formed by punching and forming a substantially T-shape and bending a metal plate into a U-shape. The push button guide piece 31 has a rectangular through hole 32 through which the push button 1 is inserted. The push button guide pieces 33 have two rectangular through holes 34a and 34b that are inserted individually, and these pieces are bent in the same direction and face each other, and each of the push button guide pieces 31 and 33 described above is a mounting piece. One piece is molded in 35.

The extending portion on the other end side of the mounting piece 35 consists of a wide portion and a narrow portion, and a mounting screw hole 36 is provided in the center of the wide portion 37, and a mounting screw hole 36 is provided in the center of the wide portion 37, and a portion near the extending end of the push button guide pieces 31, 33 The center portions of the narrow pieces were bent at right angles, the ends of the narrow pieces were used as rotation stoppers, and a triangular protrusion was formed upward at the edge of the through hole 34b to form the contact point 38. It is something.

In addition, as shown in FIG. 22, a semicircular arc-shaped through hole 34
Twin contacts 38, 38 may be formed by increasing the width of the hole a in a semicircular manner, forming a pair of triangular projections on the edge of the hole, and bending each of these projections upward.

The movable contact piece 4 has a metal plate slightly thinner than the vertical width of the groove so that it can be inserted into the pair of insertion grooves 15. As shown in FIG. It is wide and has a contact piece 41 with a screw hole 42 formed on the one end side, and a similar projection 45 is provided on the narrow side of the wide part facing a pair of arch-shaped retaining projections 43.

Furthermore, a wide part 45 is formed on the other end side from the narrow part 49, and at the tip after passing through this wide part 45, a narrow protrusion 47 whose width is slightly shorter than the length of the vertically divided groove 14 forming the pair is formed.
form.

The push switch PS of this invention has the above structure and is assembled as shown in FIGS. 1 to 13.

That is, first, the elastic member 2, which is longer than the cylindrical body 12, is inserted into the cylindrical body 12 forming the push button 1, and then the cylindrical body 12 is inserted through the push button guide pieces 31, 33 of the fixed contact structure 3. Insert into the holes 32 and 34a, 34b, respectively, and insert the rod portion 3 between the through holes 34a, 34b.
9 and the button head 11 of the push button 1.
be placed.

Furthermore, the fixed contact structure 3 is pushed and moved toward the button head 11 side against the elasticity of the elastic member 2, and then the movable contact piece 4 is inserted into the pair of insertion grooves 15 and 16.
As shown in FIGS. 0 to 12, from the narrow protrusion 47 side, first the pair of insertion grooves 1 which are wider than the protrusion 45 are inserted.
5, and push it in along the insertion guide shoulders 15a, 16a formed on the cylindrical body 12, and insert the pair of locking hooks 48, 48, which are slightly wider than the pair of insertion grooves 15, into the insertion grooves 15. As shown in FIG. 12, by using the elasticity of the material of the cylindrical body 12 of the push button 1, the push button 1 is further forcibly pushed in, and then passed through as shown in FIG.
A protrusion 45 slightly wider than the groove width 5 abuts against the side wall surface of the push button 1 to prevent insertion.

In this state, the narrow protrusion 47 is inserted into the pair of insertion grooves 1.
5 into the narrow pair of insertion grooves 16,
The protrusion 45 comes into contact with the inner wall of the push button 1 and the protrusion 4
5. Both prevent insertion.

Since the pair of locking hooks 48, 48 are cut at right angles, the cut end surfaces come into contact with the inner wall of the push button 1 to prevent it from coming off, and the assembly requires tightening means such as screws. Complete without any problems.

After the assembly is completed, as shown in FIGS. 2 to 9 and 18, the contact 38 protrudes into the narrow part 49 between the protrusions 43 and 45, and the ridgeline of the triangular contact 38 extends into the narrow part 49. A push switch PS, which is a normally closed contact, is formed by an elastic member 2 in contact with the side surface.

The push switch PS of this invention is constructed as described above, and the mounting piece 35 is fixed to a member to be mounted (not shown) by screwing the mounting screw into the screw hole 36 and inserting the rotation stopper 37 into the groove. By connecting one electrode to the member to be mounted and the other electrode to the contact piece 41 via a power supply circuit and a lamp, a door switch for an interior light of an automobile, for example, is constructed.

To open the contact, as shown in FIGS. 8 and 21, the movable contact is released from the contact 38 by pushing the button head 11 of the push button 1 against the elasticity of the elastic member 2 (that is, by closing the door). The piece 4 separates by a distance proportional to the amount of push of the push button 1 and opens.

7 and 20 due to the elasticity of the elastic member 2.
It automatically returns to the state shown in the figure and enters the closed state.

In other examples of this invention shown in FIGS. 14 to 22, the same reference numerals as in the embodiment shown in FIGS. 1 to 13 indicate the same parts, but in this example, the push button 1 and the shapes of the through holes 32, 34a and 34b of the fixed contact structure 3 are slightly different, but the assembly order and operation are the same as the examples shown in FIGS. 1 to 13.

[Effects of the invention] Since this invention is configured as described above, it produces the effects described below.

The push switch according to the first aspect has a small number of parts and does not use fastening means such as screws, so it is suitable for automatic assembly, has high mass productivity, and can be provided at low cost.

In the push switch according to the second aspect of the invention, an insertion guide shoulder 15 formed on the inner surface of the cylindrical body 12 of the push button 1 is provided.
Since the movable contact piece 4 can be guided and pushed in by a and 16a, it is easy to assemble and is useful for automation.

The push switch according to the third aspect provides good stability when a coil spring is inserted into the cylindrical push button.

In the push switch according to the fourth aspect, insertion of the movable contact piece is less likely to be strained and cracks are less likely to occur.

[Brief explanation of the drawing]

The figures show one embodiment of this invention. Figure 1 is an exploded perspective view of the push switch, Figure 2 is a perspective view of the fully assembled state, Figure 3 is a top view of the push switch shown in Figure 2, and Figure 3 is a top view of the push switch shown in Figure 2. Figure 4 is also a side view, Figure 5
The figure is a cross-sectional view taken along line A-A in Figure 4, Figure 6 is a cross-sectional view taken along line B-B, and Figure 7 is a cross-sectional view taken along line C-- in Figure 3.
8 is a sectional view in a different state from FIG. 7, FIG. 9 is a sectional view taken along the line D-D in FIG. 3, and FIGS. 10 to 13 are each a movable contact Figures 14 through 22 all show other examples of this invention, with Figure 14 being an exploded perspective view of the push switch, and Figure 15 showing it in its assembled state. , FIG. 16 is a top view, FIG. 17 is a side view, and FIGS. 18 and 19 are explanatory diagrams of the procedure for inserting the movable contact piece into the push button when the FF line is disconnected in FIG. 17. , FIG. 20 and FIG. 21 are both cross-sectional views showing the closed state and open state of the E-E disconnection in FIG.
FIG. 2 is a sectional view showing an example in which the fixed contacts are twin-shaped. 1...Push button, 31, 33...Guidance piece, 12...
Insulating cylindrical body, 32, 34a, 34b...through hole,
13, 14... Pair of vertical grooves, 35... Mounting piece, 15, 16... Pair of insertion grooves, 38...
... Fixed contact, 15a, 16a ... Insertion guide shoulder, 4 ... Movable contact piece, 2 ... Elastic member, 47 ...
Projection piece, 3... Fixed contact structure, 48... Pair of locking hooks.

Claims (1)

[Claims for Utility Model Registration] 1. In a push switch whose contacts open and close when the contact piece moves in the pushing direction, a pair of vertical grooves 13 and 14 are formed in the longitudinal direction of the insulating cylindrical body 12. a push button 1, an elastic member 2 disposed inside the push button 1, a guide piece 31 having a through hole 32 through which the push button 1 passes, and the push button 1.
A plurality of through holes 34a, 3 whose other ends are individually penetrated by the vertical grooves 13, 14 forming a pair.
A conductive fixed contact structure 3 having guide pieces 33 formed with 4b facing each mounting piece 35 and a fixed contact 38 protruding therefrom, and the push button 1
The vertically divided grooves 13, 14 forming the pair near the ends of
A projecting piece 47 and a pair of locking hooks 48 and 4 are inserted into the pair of insertion grooves 15 and 16 that intersect with the
A push switch is provided with a movable contact piece 4 which is fixed at 8 to prevent it from coming off. 2. The push switch according to claim 1, wherein insertion guide shoulders 15a, 16a for the movable contact piece 4 are formed on the inner surface of the push button 1 along the lower edges of the pair of insertion grooves 15, 16. 3. The push switch according to claim 1 or 2, wherein the elastic member 2 is a coil spring. 4. Claim 1, wherein the push button 1 is configured such that the groove width of the insertion groove 16 intersecting the vertical groove 14 is narrower than the groove width of the insertion groove 15 intersecting the vertical groove 13,
The push switch described in 2 or 3.