JP4870592B2 - Pushbutton switch with display - Google Patents

Description

  The present invention relates to a pushbutton switch including a display device that displays an operation state of the pushbutton switch. In particular, a push-lock / turn-reset type that opens and closes the switch mechanism by pushing the push button, self-holds the push position, and releases the self-hold by rotating the push button to return to the original standby position. The present invention relates to improvement of the display device of the pushbutton switch.

  Such a push lock / turn reset pushbutton switch is used as an emergency stop pushbutton switch.

As a display device of this kind of push button switch, as shown in Patent Document 1, an indicator lamp composed of an LED lamp, an incandescent lamp, or the like built in the push button of the push button switch is used according to the operation state of the push button switch. 2. Description of the Related Art Illuminated display devices that are turned on or off by a lighting circuit to display the operation state of a push button switch are well known.
JP 09-213161 A

  A pushbutton switch equipped with such an illuminated display device requires not only a lighting circuit including a power source for lighting the indicator lamp, but also a maintenance check such as a check for a broken bulb of the indicator lamp. Therefore, there is a problem that the cost becomes high.

  In addition, the indicator lamp may not operate normally due to the life of the indicator lamp or a malfunction of the lighting circuit, and the operation state of the pushbutton switch may be erroneously displayed, resulting in a problem that the display reliability is lacking. When the pushbutton switch is used as an emergency stop pushbutton switch to command an emergency stop of the machine equipment, the erroneous display of such a display device is caused by an erroneous recognition of the operating state at the time of an emergency stop inspection of the machine equipment. There is a risk of causing personal injury.

  In order to solve the problem of the push button switch provided with such a conventional illuminated display device, the present invention provides a push button switch provided with a mechanical display device that is highly reliable in display and inexpensive. The issue is to provide.

In order to solve the above-described problems, the present invention comprises an assembly of a push button, an operation unit, and a switch unit, and opens and closes the contact of the switch unit via the operation unit by pushing the push button in the standby position. In the push button switch, the push button is self-held at the push-in position at the same time, and the push button switch at the self-holding position is returned to the standby position by the return operation of rotating the predetermined angle. A display window is provided on the front surface, and a hollow portion connected to the display window is formed at the center of the operation unit, and a display bar provided with a display unit is provided at a tip, and the display unit is connected to the display unit. the rotatably housed inside the hollow portion of the operating section so as to face the display window of the button portion, the operation portion, a fixed side of the display bar by depressing the push button in the waiting position Rotate the and is characterized in that a display switching mechanism for switching the display state of the display unit by rotating Thus the display bar to the rotation returning operation of the push button in the self-holding position in the opposite direction .

  In the above invention, the display unit is configured such that a display surface plate having a display surface that is painted in at least two colors and a display disk having a notch window formed in a part of the disc are opposed to each other. It is possible to change the display color of the display unit by arranging and configuring and rotating one of the display face plate and the display disc in conjunction with the operation of the push button.

  According to the present invention, since the mechanical display bar is rotationally driven in conjunction with the push button push-in operation and the return operation, the operation state of the push button switch is displayed. As described above, since the lighting failure due to the bulb of the indicator lamp does not occur, the display reliability can be improved, and the labor and maintenance labor can be saved.

  Embodiments of the present invention will be described below based on examples shown in the drawings.

  1 to 4 show a first embodiment of the present invention.

  1 is an elevational view including a partial cross section of a switch portion of a pushbutton switch according to the first embodiment, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a lock plate used for the pushbutton switch of the first embodiment. FIG. 4 is an explanatory diagram of the display state of the pushbutton switch of the first embodiment.

  As shown in FIGS. 1 and 2, the push button switch of the first embodiment includes a cap-like push button 1, a support 2 that supports the push button 1 so as to be movable in the axial direction and the rotation direction, and the support. 2 is connected to the operation unit 3 that operates in conjunction with the movement of the push button 1, the display mechanism 4 that is housed in the push button 1 and the hollow portion of the operation unit 3, and the support 2. Is provided with a switch unit 5 for opening and closing the internal contacts.

  The push button 1 is provided with a display window 11 on the front surface, which is closed by a globe 12 formed of a transparent resin so as to be freely opened and closed.

  As shown in FIG. 2, the support 2 includes a base 21 having a support rod 24 at the center, a cylinder 22 a formed at the center, a frame 22 coupled to the base 21, and 2 facing the base 21. A pair of lock plates 26 fixed to the side are integrally combined.

  The operation unit 3 includes a rotating cylinder 31 rotatably accommodated in a cylinder 22 a of the frame 22, a push rod 32 coupled to the rotating cylinder 31 via a trigger spring 34, and a cylinder of the rotating cylinder 31 and the frame 22. 22a, a push button return spring 33 formed of a torsion spring that applies elastic restoring force in the rotational direction and the axial direction to the rotary cylinder 31, and a lock plate 26 provided on the base 21 at the lower end of the push bar 32. And a lock pin 35 accommodated in a lock pin accommodating hole 37 formed so as to be able to protrude and retract through a lock spring 36.

  Then, the rotary cylinder 31 fitted to the push rod 32 of the operation unit 3 via the trigger spring 34 is fitted by fitting the axial longitudinal groove 31a into the convex strip 32a provided in the axial direction on the outer periphery of the push rod 32. The push bar 32 can move only in the axial direction, that is, in the vertical direction, and rotates together with the push bar 32 in the rotational direction.

  The push bar 32 of the operation unit 3 includes a through hole 32b penetrating in the axial direction at the center. The operation unit 3 is placed on the base 21 so that the support bar 24 provided on the base 21 is loosely fitted into the through hole 32b of the push bar 32.

  The display bar 41 constituting the display mechanism 4 has a cylindrical shape, and has a display face plate 42 provided with an appropriate fan-shaped color, for example, a colored portion 42a painted in red at 60 ° intervals. The portions other than the coating color portion 42a of the display surface plate 42 are either applied to the background color of the material or different from the color of the coating color portion 42a, for example, green.

The display bar 41 is fitted to the support bar 24 in the through hole 32 b of the push bar 32 via the display return spring 44. At this time, the longitudinal grooves 41a provided on the display bar 41, by fitting the axial direction of the projections 24a of the support bar 24, the display rod 41 can only move linearly in the axial direction relative to the support rod 24 Therefore, the rotation becomes impossible.

  A display disc 43 that forms a display unit in a pair with the display face plate 42 is provided and is fixed to the tip of the rotary cylinder 31. The display disc 43 is formed with a fan-shaped cutout window 43a similar to the coating color portion 42a of the display face plate 42 in the same arrangement.

The display surface plate 42 and the display disc 43 are relatively rotatable in as described later, by displaying disc 43 is rotated with respect to the display faceplate 42, within the notch window 43a of the display disc 43 The display color changes as the paint color portion 42a of the display face plate appears or disappears.

  The switch unit 5 includes an operation piece 51 that opens and closes an internal contact (not shown). When the switch unit 5 is coupled to the base 21 of the support 2, the tip of the operation piece 51 protrudes into the support 2 from the operation hole 21 a of the base 21 and can be operated by the push bar 32 of the operation unit 3.

  A push button return spring 33 mounted between the cylinder 22 a of the support 2 and the rotary cylinder 31 of the operation unit 3 has a lower end side coupled to the cylinder 22 a and an upper end side coupled to the rotary cylinder 31. The push button 1 is coupled to the support 2 via the operation unit 3 by screwing into the tip of the rotary cylinder 31.

  The pushbutton switch configured in this way is inserted through the cylinder 22a of the support body 2 into a mounting hole provided in a panel such as a control panel (not shown), and a mounting nut 25 (see FIG. 1, see FIG. 2). Is omitted) and screwed into a screw provided on the outer periphery of the cylinder 22a to be fastened to the panel.

  Next, the operation of the push button switch configured as described above will be described.

  FIG. 1 shows a standby state of the push button switch. In this state, the display bar 41 of the display mechanism 4 housed in the push bar 32 of the operation unit 3 is guided and supported by the support bar 24 protruding from the base 21 so as to be movable in the axial direction. The display return spring 44 made of the compressed spring is urged upward, and the display face plate 42 at the tip is pressed against the lower surface of the display disk 43 fixed to the rotary cylinder 31 of the operation unit 3.

  Further, the lock pin 35 of the push bar 32 is pressed against the lock plate 26 by a lock spring 36. The inner wall of the lock plate 26 is formed in an L shape as shown in detail in FIG. A lock piece 27 is provided. A gap 27 c is provided between the tip of the horizontal side portion 27 b of the lock piece 27 and the right side wall 26 r of the lock plate 26.

  Further, the push button return spring 33 is in a return state when the lock pin 35 is in a position where it hits the left side wall 26l of the lock plate 26 (S point in FIG. 3B). For this reason, in the standby state of the pushbutton switch, when the lock pin 35 is in the position where it hits the vertical side 27a on the horizontal side 27b of the lock piece 27, that is, the N position in FIG. The torsional force in the clockwise direction is applied to the push button return spring 33 as a bias by the width W of the vertical side portion 27a of 27. The width W of the vertical side portion 27a is set to be a predetermined rotation angle, for example, 60 °.

  Here, when the push button 1 is pushed against the spring force of the push button return spring 33 to operate the push button switch, the rotary cylinder 31 is pushed together with the push button 1 and moves downward in FIG. To do. Accordingly, when the trigger spring 34 is compressed and reaches a predetermined spring force, the lock pin 35 moves over the lock piece 27 and moves below the lock piece 27 and is locked at that position.

  When the lock pin 35 of the push bar 32 gets over the lock piece 27, there is no portion to stop the lock pin 35, so that the rotating cylinder 31 and the push bar coupled to the rotary cylinder 31 are restored by the restoring force in the rotational direction given from the push button return spring 33. 32 is rotated counterclockwise, and the lock pin 35 is moved to the S position where the left side wall 26l of the lock plate 26 is hit (see FIG. 3B), and the push button 1 is locked at this position to hold the pushed state. It becomes like this.

  When the push rod 32 is pushed to this position, the push rod 32 hits the operation piece 51 of the switch portion 5 protruding on the base 21 of the support body 2 and pushes it down, so that the contact of the switch portion is opened or closed. Will be kept in that state.

  In the course of this push-in operation, the display bar 41 is pushed down by the display disc 43 by the lowering of the rotary cylinder 31, so that the display bar 41 descends following the rotary cylinder 31 while compressing the display return spring 44. Do not rotate.

  And in the standby state of a pushbutton switch, the display disc 43 of the display mechanism 4 exists in the standby position shown to Fig.4 (a). At this time, when the cutout window 43a of the display disc 43 is placed at a position painted, for example, in white, which is out of the position facing the first coating portion 42a of the display face plate 42 in contact therewith, the push button 1 In the display window 11, white appears as shown in FIG. 4A to indicate that the pushbutton switch is in a standby state (non-operating state).

  From this state, when the push button 1 is pushed in and pushed to the lock position, the rotary cylinder 31 and the push rod 32 are pushed in as described above, and the lock pin 35 provided on the push rod 32 gets over the lock piece 27 of the lock plate 26 and Move down. As a result, since the rotation direction of the push rod 32 is not restrained, the push button return spring 33 is twisted clockwise by a predetermined angle, and the push rod 32 and the rotation force are restored by the restoring force in the counterclockwise rotation direction accumulated therein. The cylinder 31 is rotated counterclockwise by an angle corresponding to the width W of the vertical side portion 27a of the lock piece 27, for example, 60 °. By this rotation, the display disc 43 is rotated together with the rotary cylinder 31, so that the cutout window 43 a of the display disc 43 is, for example, the first coating portion 42 a colored in red on the display face plate 42 of the display bar 41. 4, the display window 11 of the push button 1 shows the display color (for example, red) of the first paint color portion 42 a as shown in FIG. 4B, and the push button switch is in the operating state. Display that there is.

  In order to return the pushbutton switch in the operation state locked (self-held) to the push-in position, the pushbutton 1 is rotated by a predetermined angle in the arrow direction indicated on the surface of the pushbutton, that is, in the clockwise direction. . As a result, the rotary cylinder 31 and the push rod 32 rotate together with the push button 1, so that the lock pin 35 extends along the lower surface of the lock piece 27 of the lock plate 26 from the S position in FIG. It is moved until it hits the right side wall 26r.

When the operating force applied to the push button 1 is released at this position, the lock pin 35 reaches the gap 27c where the lock piece 27 is missing, so that the axial direction by the push button return spring 33 applied to the rotary cylinder 31 and the push rod 32 and Since the restriction on the restoring force in the rotational direction is removed, the restoring force pushes up the rotating cylinder 31 and the push rod 32 and rotates them counterclockwise, so that the lock pin 35 is shown by a dotted arrow in FIG. As shown in Fig. 3, it moves upward above the lock piece 27 and further moves horizontally on the lock piece 27 until it hits the wall surface of the vertical piece portion 27a of the lock piece 27 to return to the standby position N in Fig. 3 (b) . Button 1 enters a standby state. In this process, when the push bar 32 moves above the lock piece 27, the pressing of the operation piece 51 of the switch unit 5 is released, and a contact (not shown) is returned to the original state of opening or closing. At this time, the rotary cylinder 31 and the push button 1 are also pushed up together with the push bar 32.

  In the process of returning to the standby state, the display bar 41 is pushed up by following the ascent of the rotary cylinder 31 by the restoring force of the display return spring 44, so that the display face plate 42 is always pressed against the lower face of the display disc 43. Ascended but not rotated. On the other hand, the display disc 43 rotates together with the rotary cylinder 31 and returns to the return position, so that the cutout window 43a of the display disc 43 is replaced with, for example, a red coating portion of the display face plate 42 of the display bar 41. The position moves away from the position facing the surface 42a and moves to a position facing the white paint portion, for example. Thereby, the display window 11 of the push button 1 returns to the white display state shown in FIG. 4A and becomes a display indicating that it is in a standby state (non-operation state).

  Thus, in the first embodiment, when the push button 1 of the push button switch is pushed in and locked in the push position, the contact of the switch unit 5 is opened and closed, and then the push button 1 is rotated and the standby position is set. The mechanism that rotates the rotating cylinder 31 inside the operation unit 3 in conjunction with a series of operations for returning the contact of the switch unit 5 to the display unit becomes a display switching mechanism, and the display state of the display mechanism is changed from the standby state. Since the operation state is switched to or from the operation state to the standby state, the switch operation and the display on the display device are switched completely in synchronization, and the display reliability can be improved. In addition, since the display device is composed of mechanical elements, it is not necessary to inspect the broken ball as in the case of the illumination type display device, and the maintenance work can be omitted.

  5 to 11 show a second embodiment of the present invention. This embodiment will be described below.

  As is apparent from FIGS. 5 and 6, the pushbutton switch of the second embodiment includes a pushbutton 1, a support 2 that supports the pushbutton 1, an operation unit 3 and a support that are housed in the support 2. 2 is provided, and the appearance is the same as that of the first embodiment. This is also the same in that the display mechanism 4 is housed in the hollow portion at the center of the push button 1 and the operation unit 3.

  However, the second embodiment is different from the first embodiment in that the lock pieces 28 of the lock plate 26 provided on the support 2 are not L-shaped but are formed in a straight line (see FIGS. 6 and 10). .

  Similarly to the case of the first embodiment, the display mechanism 4 is disposed so as to be relatively rotatable by being superimposed on the display bar 41, the display face plate 42 provided at the tip of the display bar 41, and the display face plate 42. However, the assembly structure is different from that of the first embodiment.

  That is, as shown in FIG. 7, the cylindrical display bar 41 is rotatably supported by the support bar 24 protruding from the base 21 penetrating therethrough. Between the display bar 41 and the support bar 24, a display return spring 45 that applies a restoring force in the rotational direction to the display bar 41 is mounted. A display face plate 42 is fitted and fixed to the tip of the display bar 41. The display disk 43 is fitted to the mounting portion 24a that is split into two at the tip of the support bar 24 from the through hole 42b in the center of the display face plate 42, and is attached so as not to rotate.

  As described above, in the second embodiment, the display disc 43 in the display mechanism is fixed and the display face plate 42 is configured to be rotatable, and is in a reverse relation to the first embodiment. Similar to the first embodiment, on the surface of the display face plate 42, paint color portions 42a painted in an appropriate fan-shaped color, for example, red, are provided at intervals of 60 °. The portions other than the coating color portion 42a of the display surface plate 42 are painted in a background color of the material or a color different from the color of the coating color portion 42a, for example, green.

  Furthermore, a pair of guide protrusions 41b are provided at opposing positions on the outer periphery of the display bar 41 inserted into the push bar 32 (see FIG. 6). Then, on the peripheral wall of the push bar 32, as shown in FIG. 8, a vertical guide groove 32b for guiding the guide protrusion 41b of the display bar 41 and a lateral guide groove 32c communicating with the vicinity of the middle of the vertical guide groove 32b. Are formed in pairs at positions facing each other. The vertical guide groove 32b opens at the upper end of the peripheral wall of the push rod, and the guide protrusion 41b of the display bar 41 is inserted from this opening.

  The other configuration of the second embodiment is the same as that of the first embodiment, and thus the description thereof is omitted.

  Next, the operation of the push button switch of the second embodiment will be described.

  FIG. 5 shows a standby state of the pushbutton switch of the second embodiment. In this state, the display bar 41 of the display mechanism 4 housed in the push bar 32 of the operation unit 3 can be moved in the rotational direction and the axial direction via the display return spring 45 by the support bar 24 protruding from the base 21. Is supported by guidance. As shown in FIG. 9, the guide protrusion 41 b of the display bar 41 is lowered to a position below the horizontal guide groove 32 c of the vertical guide groove 32 b provided on the push bar 32. At this time, the display return spring 45 is previously twisted and attached so as to apply a counterclockwise restoring force to the display bar 41, so that the guide protrusion 42b of the display bar 41 inserted into the vertical guide groove 32b It is pressed against the left side wall of the guide groove 32b.

  In this state, for example, the display face plate 42 of the display bar 41 is placed at a rotational position that is out of the position facing the notch window 43a of the display disc 43 with the painted portion 42a on the upper surface painted in red. Yes. For this reason, as shown in FIG. 11A, the display color of a portion other than the coating color portion 42a of the display face plate 42, for example, white, appears in the display window 11 of the push button 1, and the push button switch waits. A state (non-operating state) is displayed.

  Further, since the push button return spring 33 is in a state in which the push button 1 and the rotary cylinder 31 are preliminarily applied with zero or a slight counterclockwise biasing force, the push button 1, the rotary cylinder 31 and the push rod are in the return state. 32 is placed at a position where the lock pin 35 abuts against the left side wall 26l on the lock plate 26, that is, at the rotational position which is the N position in FIG.

  Here, when the push button 1 is pushed in against the axial spring force of the push button return spring 33 for the operation of the push button switch, the rotary cylinder 31 is pushed together with the push button 1 and is moved downward in FIG. Move to. Accordingly, the trigger spring 34 is compressed and reaches a predetermined spring force, and the lock pin 35 at the N position in FIG. 10B moves over the lock piece 28 and moves to the S position below the lock piece 28. And locked in that position. When the lock pin 35 of the push rod 32 is pushed to the position over the lock piece 28 in this way, the operation piece 51 of the switch portion 5 protruding on the base 21 of the support body 2 is pushed down by the lower surface of the push rod 32, and the switch portion The contact is opened or closed and the state is maintained.

When the push bar 31 is lowered during the push-in operation, the display bar 41 is fixed and relatively lifted. When the display bar 41 rises relative to the push bar 31, as shown in FIG. 9, the guide projection 41 b of the display bar 41 rises in the longitudinal groove 32 b of the push bar 31, and the lock pin 35 moves the lock piece 28. At the point of getting over, it just reaches the position of the lateral guide groove 32c. When the guide projection 41b reaches the position of the lateral guide groove 32c, the rotation of the guide projection 41b is not restrained in the rotational direction, so that the display rod 41 is counterclockwise by the counterclockwise biasing force applied by the display return spring 45. The guide protrusion 41b moves in the left direction in the lateral guide groove 32c, hits the left end thereof, and stops at the S position. Since the horizontal width W of the horizontal guide groove 32c corresponds to the rotation angle of 60 ° of the display bar 41, the display bar 41 rotates 60 ° counterclockwise.
As a result, the paint color portion 42a of the display face plate 42 moves to a position facing the cutout window 43a of the display disc 43, so that the display window 11 of the push button 1 is painted as shown in FIG. The display color (for example, red) of the color part 42a appears, indicating that the pushbutton switch is in the operating state.

  In order to return the pushbutton switch in the operation state locked at the push-in position, the pushbutton 1 is rotated clockwise by a predetermined angle against the spring force in the rotational direction of the pushbutton return spring 33. As a result, the rotary cylinder 31 and the push rod 32 rotate together with the push button 1, so that the lock pin 35 is dotted along the lower surface of the lock piece 28 of the lock plate 26 from the S position in FIG. Move as indicated by the arrow. When the operation force applied to the push button 1 is released when the lock pin 35 reaches the gap 28c where the lock piece 28 is missing, the lock pin 35 is removed from the gap 28c by the axial restoring force of the push button return spring 33. As shown by the dotted arrow in FIG. 10 (b), it moves above the lock piece 28, and the rotary cylinder 31, push rod 32 and push button 1 are pushed up.

  By the upward movement of the push rod 32, the pressing of the operation piece 51 of the switch unit 5 is released, and a contact (not shown) is returned to the original state of opening or closing.

  On the other hand, when the push button 1 is rotated in the clockwise direction for returning, the push bar 32 is simultaneously rotated. However, the guide protrusion 41b of the display bar 41 in the lateral guide groove 32c of the push bar 32 is relatively guided by this side guide. After moving in the right direction in the groove 32 and reaching the vertical guide groove 32b, the display return spring 45 moves downward in the vertical guide groove 32b by the restoring force of the display return spring 45, so that the display face plate 42 of the display bar 41 Since it stops at the upper end, the guide protrusion 41b of the display bar 41 returns to the N position in FIG. As a result, the display bar 41 is not subjected to the rotational force associated with the rotation of the push bar 32. Therefore, the display bar 41 does not move in the rotation direction and stops at that position. Become.

  When the lock pin 35 of the push bar 32 is moved above the lock piece 28 through the gap 28c of the lock plate 26 by the rotation return operation of the push button 1, the operation force in the rotational direction applied to the push button 1 from the outside is removed. Therefore, the push button 1, the rotating cylinder 31, and the push rod 32 are rotated counterclockwise by the restoring force in the rotation direction of the push button return spring 33, and the lock pin 35 returns to the standby position N in FIG. It becomes a state.

  In the process of returning to the standby state, the display bar 41 is rotated counterclockwise by the guide protrusion 41b being pushed by the vertical guide groove 32b of the push bar 32 by the counterclockwise rotation of the push bar 32 (see FIG. 9). At the same time, the display return spring 45 is also twisted in the same direction, and a restoring force is applied to the display bar 41. As a result, for example, the red paint color portion 42a of the display surface 42 of the display bar 41 is removed from the position facing the cutout window 43a of the display disc 43, and at this position, the display color other than the paint color portion 42a, for example, a white color position. In order to move, the white display of Fig.11 (a) appears in the display window 11 of the pushbutton 1, and it is displayed that it is in a standby state (non-operation state).

  In the push button switch of the second embodiment, as in the first embodiment, when the push button 1 of the push button switch is pushed in and locked in the pushed position, the contact of the switch unit 5 is opened and closed. A mechanism for rotating the display rod 41 of the display mechanism in conjunction with a series of operations for rotating the push button 1 to return to the standby position and returning the contact of the switch unit 5 becomes a display switching mechanism. Since the display state is switched from the standby state to the operation state, or from the operation state to the standby state, the switch operation and the display on the display device are switched in complete synchronization, and the display reliability can be improved. In addition, since the display device is composed of mechanical elements, it is not necessary to inspect the broken ball as in the case of the illumination type display device, and the maintenance work can be omitted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view including a partial cross section showing a configuration of a push button switch according to a first embodiment of the present invention. It is a disassembled perspective view which shows the structure of the pushbutton switch of Example 1 of this invention. The lock board used for the pushbutton switch of Example 1 of this invention is shown, (a) is a perspective view which shows the structure, (b) The operation | movement explanatory drawing. It is a figure which shows the display state of the pushbutton switch of Example 1 of this invention, (a) shows a standby state, (b) shows an operation state. It is an elevational view including the partial cross section which shows the structure of the pushbutton switch of Example 2 of this invention. It is a disassembled perspective view which shows the structure of the pushbutton switch of Example 2 of this invention. It is a longitudinal cross-sectional view which shows the assembly structure of the display part in the pushbutton switch of Example 2 of this invention. It is an elevation view which shows the push rod used for the pushbutton switch of Example 2 of this invention. It is operation | movement explanatory drawing of the pushbutton switch display part of Example 2 of this invention. The lock board used for the pushbutton switch of Example 2 of this invention is shown, (a) is a perspective view which shows the structure, (b) is the operation | movement explanatory drawing. It is a figure which shows the display state of the pushbutton switch of Example 2 of this invention, (a) shows a standby state, (b) shows an operation state.

1: Push button 2: Support body 3: Operation part 4: Display mechanism 5: Switch part

Claims (2)

It consists of an assembly of a push button, an operation part, and a switch part, and by switching the opening and closing of the contact of the switch part through the operation part by pushing the push button in the standby position, the push button is moved to the push position at the same time. In the push button switch that is self-held and is returned to the standby position by a return operation of rotating the push button switch at the self-holding position by a predetermined angle, a display window is provided on the front surface of the push button, A hollow portion continuous with the display window is formed at the center portion, and a display bar provided with a display portion is provided at the tip, and the display bar is disposed on the operation portion so that the display portion faces the display window of the button. rotatably housed in the hollow portion, the operating portion rotates the display rod by depressing the push button in the standby position in a predetermined direction, in the self-holding position press Pushbutton switch with a display device which is characterized in that a display switching mechanism for switching the display state of the display unit by rotating Thus the display bar to the rotational restoring operation of Tan in the opposite direction.   2. The pushbutton switch according to claim 1, wherein the display section includes a display face plate having a display face that is painted in at least two colors, and a cutout window formed by cutting out a part of the disc. The display color of the display unit is switched by rotating either one of the display face plate and the display disc in conjunction with the push-in operation and the return operation of the push button. Push button switch with a display device.

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