JP4784708B1 - switch - Google Patents

Abstract

The present invention provides a high-productivity switch wherein a press button can be mounted after incorporating internal components into a housing. For this purpose, a press button (90) is inserted into an operating hole (14) in a housing (10) such that an engaging projection (91) provided on the lower end edge portion of the press button (90) is engaged with a first engaging groove (17) provided on the inner periphery surface of the operating hole (14). Further, said engaging projection (91) which passed through said first engaging groove (17) pushes a slider (60) downward while rotating said press button (90). Then, the engaging projection (91) of said press button (90) is engaged with a second engaging groove (64) which is provided on the inner periphery surface of a recessed portion (63) of said slider (60), whereby said slider (60) moves upward and holds said press button (90) in place.

Description

The present invention relates to a switch, and more particularly to a switch in which a push button can be retrofitted to a housing.

  Conventionally, as a switch having a push button, for example, a housing having a storage portion, an operation member for receiving a pressing operation, a metal common contact and a metal switching contact erected in the storage portion There is a switch device including a movable contact having a contact portion that is separated from and connected to the switching contact, and a snap action mechanism that drives the movable contact when the operation member is pressed to a predetermined position (see Patent Document 1). ).

JP 2010-73662 A

However, in the switch device described above, as apparent from FIG. 2, it is necessary to assemble the upper case 21 in which the operation member 5 is assembled in advance to the lower case 22. For this reason, there is a problem that the assembling work takes time and requires skill for assembling, resulting in low productivity.
The switch according to the present invention is to provide a highly productive switch capable of retrofitting a push button to a housing in which internal components are assembled.

  In order to solve the above problems, the switch according to the present invention is supported by a push button inserted into the operation hole of the housing so as to be able to reciprocate in the vertical direction, and supported so as to be capable of reciprocating in the vertical direction within the housing, and A switch that is urged upward and includes a slider in which a recess provided on the upper end surface is pushed down by the lower end of the push button, and a built-in switch that drives the operation button by the slider pushed down by the push button The engagement protrusion provided on the lower edge of the push button is inserted into the first engagement groove provided on the inner peripheral surface of the operation hole of the housing, and passes through the first engagement groove. By rotating the push button while pushing down the slider with the engaging protrusion, and engaging the engaging protrusion of the push button with the second engaging groove provided on the inner peripheral surface of the concave portion of the slider, The slider It rises and is configured so as to retaining the pushbutton.

  According to the present invention, when the engagement protrusion of the push button is engaged with the second engagement groove of the slider, the push button cannot be returned to the original position, and the engagement protrusion of the push button is not engaged with the first engagement of the housing. The push button does not fall out of the groove, and the push button does not fall out of the housing. Therefore, the push button can be easily retrofitted to the housing incorporating the internal components, and a highly productive switch can be obtained.

As an embodiment of the present invention, the slider may be biased upward by a spring member housed in the housing.
According to the present embodiment, since the slider housed in the housing is biased upward, the slider is unlikely to rattle.

Further, as another embodiment of the present invention, a configuration in which the axis of the first engagement groove and the axis of the second engagement groove are not arranged on the same straight line may be adopted.
According to this embodiment, the shaft center of the first engagement groove and the shaft center of the second engagement groove are displaced from each other when viewed from above, and the push button cannot be returned to the original position by raising the slider. Therefore, the push button does not fall off from the housing.

As another embodiment of the present invention, the engagement protrusion of the push button may be in contact with the inner ceiling surface of the housing.
According to this embodiment, the push button is sandwiched between the inner ceiling surface of the housing and the slider biased upward, and a switch without backlash is obtained.

As another embodiment of the present invention, the position regulating notch provided on the upper end surface of the slider may be configured to be able to abut on a position regulating piece arranged in the housing.
According to the present embodiment, the position regulating notch provided on the upper end surface of the slider biased upward can be brought into contact with the position regulating piece arranged in the housing. Energized state can be secured. For this reason, there is an effect that a switch that does not cause backlash and is unlikely to malfunction can be obtained.

1A and 1B are perspective views of a switch according to the present invention viewed from different angles. It is a disassembled perspective view of the switch shown to FIG. 1A. It is a disassembled perspective view of the switch shown to FIG. 1B. 4A and 4B are cross-sectional views showing before and after operation of the switch shown in FIG. 5A and 5B are a perspective view and a partial cross-sectional perspective view for explaining a method of assembling the push button. 6A and 6B are partial cross-sectional perspective views for explaining a method of assembling the push button subsequent to FIGS. 5A and 5B. 7A and 7B are partial cross-sectional perspective views for explaining a method of assembling the push button following FIGS. 6A and 6B. 8A and 8B are partial cross-sectional perspective views for explaining a method of assembling the push button subsequent to FIGS. 7A and 7B. 9A and 9B are partial cross-sectional perspective views for explaining a method of assembling the push button subsequent to FIGS. 8A and 8B. 10A and 10B are a longitudinal sectional view and a transverse sectional perspective view for showing the push button of the switch after the assembly is completed. 11A, 11B and 11C are cross-sectional views for continuously explaining the method of assembling the push button.

Embodiments of a switch according to the present invention will be described with reference to the accompanying drawings of FIGS.
2 and 3, the switch according to the present embodiment is assembled with the housing 10, the contact terminals 30, 31, the socket 40, the micro switch 50, the slider 60, and the coil spring 70, and the housing. The holder 20 is assembled to the housing 10 from the side, and the push button 90 is assembled to the housing 10 together with the rubber cap 80.

As shown in FIGS. 2 and 3, the housing 10 has a box shape having an opening 11 (FIG. 3) on one side surface thereof. A step portion 13 is formed. And the screw hole 13a is provided in the side surface of the said step part 13 for fitting.
Further, the housing 10 is provided with an annular small rib 15 and an annular large rib 16 concentrically at the opening edge of the operation hole 14 provided on the upper surface thereof, and a first along the inner peripheral surface of the annular small rib 15. Engagement grooves 17 are provided in the vertical direction. Further, a pair of protective walls 18 and 18 are provided on the outside of the large annular rib 16 so as to protect a push button 90 described later from external force.

The holder 20 has a side wall 21 that can be assembled from the opening 11 of the housing 10. A pair of engaging claws 22 and 22 are projected on the outward surface of the side wall 21 so as to face each other, and a base portion 23 is projected to save the sealing material and increase the sealing strength. It is.
The holder 20 is provided with guide protrusions 25a at the corners of the base portion 24 having a substantially L-shaped cross section protruding from the inward surface of the side wall 21, and the partition protrusions in parallel with the guide protrusions 25a. By providing the strip 25b, a guide groove 25c for guiding a slider 60 described later is formed. A positioning projection 25d for positioning a coil spring 70 described later is provided on the bottom side of the guide groove 25c and on the inner bottom surface of the base portion 24. On the other hand, a position restricting piece 25e is projected in the horizontal direction from the upper end of the partitioning ridge 25b.
A pair of shaft portions 26 and 26 for assembling a microswitch 50 to be described later are projected from the inner surface of the base portion 24. Furthermore, notch grooves 27 and 27 (FIG. 3) for fitting a common fixed contact terminal 30 and a movable contact terminal 31 described later are provided in the base portions of the shaft portions 26 and 26, respectively.

The common fixed contact terminal 30 and the movable contact terminal 31 are integrally punched out by press working via the connecting portion 32 and are press-molded. A normally closed fixed contact connecting portion 34 and a normally open fixed contact connecting portion 35 extend from the other end of the movable contact terminal 31.
However, when assembling, either one of the normally closed fixed contact connecting portion 34 and the normally held fixed contact connecting portion 35 is cut out as necessary, and the connecting portion 32 is cut and used.

  The socket 40 has a cylindrical shape into which a connector (not shown) can be inserted, and as shown in FIG. 4, a pair of terminals into which the common fixed contact terminal 30 and the movable contact terminal 31 can be inserted into a connecting portion 41 provided on one side thereof. A pair of engagement grooves 44 and 44 (FIGS. 2 and 3) are provided so as to have holes 42 and 43 and to face each other with the terminal holes 42 and 43 therebetween.

  The micro switch 50 has an operation button 51 that can slide in the axial direction on one side surface of one side, and a common fixed contact terminal 52, a normally closed movable contact terminal 53, and a normally open movable contact terminal 54 on the other side surface. It protrudes. The microswitch 50 is provided with a pair of shaft holes 55 and 55 so as to penetrate the front and back surfaces.

As shown in FIG. 2, the slider 60 is a molded product having a planar shape that is slidably fitted into the guide groove 25c. The slider 60 is formed with a notch 61 that fits in the guide protrusion 25a at the corner on the back side, and a pair of sliders 60 on the front side to reduce the contact area. Slide protrusions 62 and 62 are arranged side by side. Further, the slider 60 is provided with a recess 63 on the upper surface thereof into which a lower end portion 95 of a push button 90 described later is fitted. A second engagement groove 64 is provided on the inner peripheral surface of the recess 63, and a part of the second engagement groove 64 is notched to provide a position regulating notch 65. An operation taper surface 66 is provided immediately below the position regulating notch 65. Further, the slider 60 is provided with a fitting hole 67 (FIG. 3) into which the coil spring 70 can be fitted on the lower end surface thereof.
The first engagement groove 17 and the second engagement groove 64 are provided at positions shifted from each other by 90 degrees as viewed from above, but they may not be arranged on the same straight line. , 45 degrees, 60 degrees, 120 degrees, and 180 degrees.

  The rubber cap 80 is a truncated cone-shaped cylinder having a small-diameter upper opening 81 and a large-diameter lower opening 82, and an annular rib 83 is provided on the outer peripheral edge of the lower opening 82. The annular rib 83 has a diameter that can be fitted between the annular small rib 15 and the annular large rib 16 of the housing 10.

  The push button 90 has a cross-sectional shape that can be inserted into the operation hole 14 of the housing 10. It is. The engaging annular rib 92 has an annular narrow neck portion 93 provided at the base thereof, and a mark protrusion 94 provided at a position corresponding to the engaging protrusion 91. Note that the lower end portion 95 of the push button 90 has a dome shape that bulges downward in order to prevent contact with each other.

Next, a switch assembly method according to this embodiment will be described. For convenience of explanation, a case where the normally closed movable contact connecting portion 34 is cut out and the normally open movable contact connecting portion 35 is left will be described.
First, after the separated common fixed contact terminal 30 and movable contact terminal 31 are inserted into the terminal holes 42 and 43 of the socket 40 and positioned, the pair of engaging grooves 44 and 44 of the socket 40 are paired with the pair of holders 20. Engage with the engaging claws 22, 22 and slide. Then, the common fixed contact terminal 30 and the movable contact terminal 31 are fitted into the cutout grooves 27 and 27 of the holder 20, respectively.

  Then, a pair of shaft holes 55, 55 of the micro switch 50 are inserted into the pair of shaft portions 26 of the holder 20, and the common fixed contact connection portion 33 and the normally open movable contact connection portion 35 are connected to the common fixed contact terminal 52 and The movable contact terminal 54 is soldered. Further, the slider 60 in which the coil spring 70 is previously assembled is assembled in the guide groove 25 c of the holder 20. At this time, the position regulating notch 65 of the slider 60 comes into contact with the position regulating piece 25e of the holder 20 and is temporarily fixed. Further, after the holder 20 is inserted from the opening 11 of the housing 10, a sealing material (not shown) is injected and solidified on the outward surface of the side wall 21 to be sealed.

Next, as shown in FIG. 5, the lower end portion 95 of the push button 90 is press-fitted from the upper opening portion 81 of the rubber cap 80, and the upper opening portion 81 of the rubber cap 80 is engaged with the narrow neck portion 93 of the push button 90. To prevent it from coming off. Then, the engagement protrusion 91 of the push button 90 is fitted and inserted into the first engagement groove 17 provided in the operation hole 14 of the housing 10 (FIG. 11A). Further, against the spring force of the coil spring 70, the slider 60 is pushed down by the engaging protrusion 91 of the push button 90 (11B, FIG. 6), and the engaging protrusion 91 comes out of the first engaging groove 17 (FIG. 7). Then, the engagement protrusion 91 of the push button 90 is rotated to the second engagement groove 64 side of the slider 60 (FIG. 8). When the engaging protrusion 91 engages with the second engaging groove 64 of the slider 60, the slider 60 is pushed upward by the spring force of the coil spring 70, and the position is regulated (FIG. 9). Further, the engagement protrusion 91 of the push button 90 abuts on the inner ceiling surface 10a of the housing 10 and the position is regulated (FIG. 10). Thereby, the push button 90 becomes unrotatable and does not come off due to the engagement state of the slider 60 with the second engagement groove 64. Finally, the large annular rib 16 is caulked and the annular rib 83 of the rubber cap 80 is sealed.
After the assembly is completed, the slider 60 and the position restricting piece 25e of the holder 20 are not in contact with each other (FIG. 11C). 4A and 11C, the taper surface 66 of the slider 60 and the operation button 51 of the micro switch 50 appear to be in contact with each other, but there is a small gap between the taper surface 66 and the operation button 51. Yes, they are not in contact.

  In the present embodiment, the slider 60 is biased upward by the spring force of the coil spring 70, so that no rattling occurs. In addition, since the tapered surface 66 of the slider 60 is not in contact with the operation button 51 of the micro switch 50, the switch after assembly is advantageous in that it can prevent malfunction due to vibration or the like.

Next, an operation method of the switch will be described.
First, as shown in FIG. 4A, in the no-load state, the slider 60 is biased upward by the spring force of the coil spring 70, and the push button 90 is also biased upward via the slider 60. The slider 60 does not rattle. Further, there is a minute gap between the operation taper surface 66 of the slider 60 and the operation button 51 of the microphone switch 50, and they are not in contact with each other.

  4B, when the slider 60 is pushed down by the push button 90 against the spring force of the coil spring 70, the operation taper surface 66 of the slider 60 pushes the operation button 51 of the micro switch 50. A normally open movable contact (not shown) contacts the common fixed contact.

Next, when the pressing force on the push button 90 is released, the slider 60 is pushed upward by the spring force of the coil spring 70. For this reason, the load on the operation button 51 of the micro switch 50 is released, the operation button 51 is restored, and the normally open movable contact (not shown) is separated from the common fixed contact.
Note that the engaging projection 91 of the push button 90 is locked to the inner ceiling surface 10a of the housing 10 (FIG. 10), so that it does not come out of the housing 10, and the slider 60 contacts the push button 90. The position is regulated in contact with each other, and the original state is restored (FIG. 4A).

  In the above-described embodiment, the case where the push button 90 can be operated in the vertical direction from the operation hole 14 provided on the upper surface of the housing 10 has been described for convenience of explanation. For example, it is a matter of course that the push button 90 can be operated from an operation hole provided on the side, front or bottom of the housing 10.

Of course, the switch according to the present invention is not limited to the above-described switch, but can be applied to other switches.

DESCRIPTION OF SYMBOLS 10: Housing 10a: Internal ceiling surface 11: Opening part 14: Operation hole 17: 1st engagement groove 20: Holder 21: Side wall 24: Cross-section substantially L-shaped base 25a: Projection protrusion 25b: Partition protrusion 25c: Guide groove 25e: Position restriction piece 30: Common fixed contact terminal 31: Movable contact terminal 40: Socket 50: Micro switch 51: Operation button 60: Slider 63: Recess 64: Second engagement groove 65: Notch for position restriction 66: Tapered surface for operation 70: Coil spring 80: Rubber cap 90: Push button 91: Engagement protrusion 92: Ring rib for engagement 95: Lower end

Claims (5)

A push button inserted into the operation hole of the housing so as to be reciprocally movable in the vertical direction, and supported in a vertically reciprocable manner in the housing and biased upward, and having a recess provided on the upper end surface. A switch composed of a slider pushed down at the lower end of the push button, and a built-in switch that drives the operation button with the slider pushed down by the push button,
The engagement protrusion provided on the lower edge of the push button is inserted into the first engagement groove provided on the inner peripheral surface of the operation hole of the housing, and the engagement is passed through the first engagement groove. The slider is lifted by rotating the push button while pushing down the slider with a protrusion and engaging the engagement protrusion of the push button with a second engagement groove provided on the inner peripheral surface of the recess of the slider. And the push button is retained.   The switch according to claim 1, wherein the slider is biased upward by a spring member housed in the housing.   The switch according to claim 1 or 2, wherein the axis of the first engagement groove and the axis of the second engagement groove are not arranged on the same straight line.   The switch according to any one of claims 1 to 3, wherein the engagement protrusion of the push button is in contact with the inner ceiling surface of the housing.   The switch according to any one of claims 1 to 4, wherein a notch for position regulation provided on an upper end surface of the slider can be brought into contact with a position regulation piece arranged in the housing.

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