JP2019139944A - Microswitch and operation device - Google Patents

Abstract

To provide a microswitch excellent in dust resistance and an operation device.SOLUTION: A microswitch 2 is housed in an operation device such as a mouse. The microswitch 2 comprises: a contact chamber 24 which houses a contact mechanism 23 for opening/closing an electric circuit; a housing 20 which houses the contact chamber 24; and a depression member 21 which is pressed from the outside of the housing 20. The depression member 21 has an insertion part 213 which is inserted through an insertion hole 250 opened on the contact chamber 24 so as to act on the contact mechanism 23. The insertion part 213 moves according to a state of pressing from the outside. The depression member 21 has a shielding part 210 for shielding the insertion hole 250. Viewing from the insertion direction, the shielding part 210 is shaped so as to cover the insertion hole 250.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a microswitch that opens and closes an electric circuit in response to external pressure, and an operating device using such a microswitch.

  Microswitches used in devices such as electronic devices have become widespread. For example, Patent Document 1 discloses a microswitch having a push button that protrudes outside a cover and can be pressed in a state where the cover is attached. In the microswitch disclosed in Patent Document 1, when the push button is not pressed, the common contact terminal and the normally closed contact terminal are electrically connected to each other by the movable contact piece, and the push button is pressed. The terminal and the normally open contact terminal are electrically connected by the movable contact piece.

JP 2017-16807 A

  The microswitch disclosed in Patent Document 1 has an effect of extending the life without increasing the outer size.

  However, the present inventor has found that there is a slight possibility that foreign matter enters through the gap between the micro switch and the cover in the micro switch with the push button protruding outside the cover. I was concerned that it could affect contact terminals, normally closed contact terminals, and normally open contact terminals.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a microswitch capable of suppressing the influence of foreign matter entering through a gap.

  Another object of the present invention is to provide an operating device using such a microswitch.

  In order to solve the above problem, a microswitch described in the present application includes a contact chamber that houses a contact mechanism that opens and closes an electric circuit, a housing that houses the contact chamber, and a pressing member that receives pressure from outside the housing. The pressing member has an insertion portion that is inserted into an insertion hole provided in the contact chamber and acts on the contact mechanism, and the insertion portion is provided on the outer side according to a pressing state from the outside. A micro switch that moves between a first position and an inner second position, wherein the pressing member has a shielding portion that shields the insertion hole on a side opposite to the contact chamber with respect to the insertion hole, The shielding part is formed so that the shape from the insertion direction covers the insertion hole.

  Further, in the microswitch, the housing has an insertion opening into which the shielding portion is movably inserted in accordance with the movement of the pressing member, and an edge of the shielding portion adjacent to the insertion opening. The inner end of the part is located on the inner side of the insertion opening when the pressing member is located at the first position.

  In the microswitch, the shielding part is plate-shaped, and an outer wall part protruding inward is formed at an edge of the shielding part.

  Further, the microswitch is characterized in that an inner wall portion protruding outward is formed around the insertion hole.

  Further, in the microswitch, an inner wall portion protruding outward is formed around the insertion hole, and the length in the insertion direction of the inner wall portion is determined by the insertion opening and the edge portion of the shielding portion. It is characterized by being longer than the gap.

  Furthermore, the operation device described in the present application includes a pressing operation unit that receives a pressing operation from the outside, and the microswitch that transmits the pressing operation received by the pressing operation unit as an external pressing. A signal based on the operation of the contact mechanism provided is output.

  The microswitch and the operation device described in the present application prevent foreign matters from easily entering the contact chamber.

  The switch device and the operating device according to the present invention include an insertion portion that is inserted into an insertion hole provided in the contact chamber, and a shielding portion that shields the insertion hole is formed on a pressing member that receives external pressure. Thereby, there are excellent effects such as shielding the insertion hole from the foreign matter and suppressing the occurrence of the influence of the foreign matter.

It is a schematic perspective view which shows an example of the external appearance of the operating device described in this application. It is a schematic perspective view which shows an example of the external appearance of the microswitch described in this application. It is a schematic perspective sectional view showing an example of a section and appearance of a microswitch described in the present application. It is a schematic sectional drawing which shows an example of the cross section of the microswitch described in this application. It is a general | schematic expanded sectional view which expands and shows the example of a part of cross section of the microswitch described in this application. It is a schematic perspective sectional view showing an example of a section and appearance of a microswitch described in the present application. It is a schematic sectional drawing which shows an example of the cross section of the microswitch described in this application. It is a schematic perspective sectional view showing an example of a section and appearance of a microswitch described in the present application. It is a schematic sectional drawing which shows an example of the cross section of the microswitch described in this application. It is a schematic perspective sectional view showing an example of a section and appearance of a microswitch described in the present application. It is a schematic sectional drawing which shows an example of the cross section of the microswitch described in this application.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Application example>
The operating device described in the present application is used as an operating device such as a mouse used for operating a personal computer (hereinafter referred to as a personal computer). In addition, the microswitch described in the present application is used in various devices such as an electronic device including an operation device. Hereinafter, the operation device 1 and the microswitch 2 illustrated in the drawings will be described with reference to the drawings.

<Operation device 1>
First, the controller device 1 will be described. FIG. 1 is a schematic perspective view showing an example of the appearance of the operation device 1 described in the present application. FIG. 1 shows an example in which the operating device 1 described in the present application is applied to a mouse used for operating an electronic device such as a personal computer. The operating device 1 includes a pressing operation unit 10 such as a mouse button that receives an operation to be pressed by an operator's finger, and a rotation operation unit 11 such as a mouse wheel that receives an operation that is rotated by the operator's finger. . The rotation operation unit 11 is configured to accept not only a rotation operation but also a pressing operation, and also functions as the pressing operation unit 10. The operation device 1 is connected to a signal line 12 that outputs an electrical signal to an external device such as a personal computer. The controller device 1 is not limited to wired communication using the signal line 12, and can output an electrical signal by various communication methods such as wireless communication.

  Inside the controller device 1, a microswitch 2 described later is accommodated for each of the pressing operation units 10 and the rotation operating unit 11. When the pressing operation unit 10 is pressed, the pressing operation unit 10 is operated. The internal part of each presses the corresponding micro switch 2. The micro switch 2 outputs a signal based on the pressing state from the signal line 12 to an electronic device such as an external personal computer.

  That is, the operating device 1 described in the present application includes a pressing operation unit 10 that receives a pressing operation from the outside, a rotating operation unit 11 that receives an operation such as a rotating operation, and further includes a micro switch 2 inside. . Then, the controller device 1 transmits the pressing operation received by the pressing operation unit 10 and / or the rotation operation unit 11 to the micro switch 2 as an external press, and a signal based on the operation of the micro switch 2 is transmitted to an external electronic device. Output to.

<Micro switch 2>
Next, the microswitch 2 will be described. In the present application, a plurality of forms will be exemplified and described as an embodiment of the microswitch 2.

<First Embodiment>
FIG. 2 is a schematic perspective view showing an example of the appearance of the microswitch 2 described in the present application. FIG. 2 illustrates the microswitch 2 according to the first embodiment. In the specification of the present application, the direction of the microswitch 2 is expressed as the left front side as the front, the right back side as the rear, the upper side as the upper side, and the lower side as the lower side in FIG. The mounting direction of the microswitch 2 is not limited. As described above, the micro switch 2 is housed inside an electronic apparatus such as the operation device 1 and accepts a pressing operation received by a part such as the pressing operation unit 10 of the operating device 1 as an external press.

  The microswitch 2 includes a housing 20 having a substantially rectangular parallelepiped shape. The housing 20 is formed by a lower base and an upper cover. From the center of the housing 20 to the left side when viewed from the front, a insertion slot 200 having an open upper surface of the housing 20 is opened upward. A push-down member 21 that receives a pressure from the outside of the housing 20 and moves up and down is inserted into the insertion opening 200 on the upper surface of the housing 20. In addition, in this application, the insertion opening 200 of the housing | casing 20 shows the inlet_port | entrance part which fits the pressing member 21, and is an edge part of the circumference | surroundings of the location which presses down the pressing member 21 in the example shown in FIG. Further, from the lower surface of the housing 20, three connection terminal portions 22 that are metal pieces to which other electric members can be connected protrude.

  In the housing 20, a guide groove 201 that guides the vertical movement of the pressing member 21 is formed on the front and back surfaces that are continuous from the upper surface portion where the insertion opening 200 is opened. The upper surface of the pressing member 21 is a plate-shaped shielding portion 210 that is inserted into the insertion opening 200 with a slight gap and shields the inside of the housing 20 from foreign matter. Further, the front surface and the rear surface of the pressing member 21 are fitted with a small gap with respect to the guide groove 201 of the housing 20 and serve as a fitting plate 211 guided by the guide groove 201.

  At the lower end of the fitting plate 211 of the pressing member 21, a restricting protrusion 212 protruding from the left and right is provided. Further, the lower end of the guide groove 201 of the housing 20 is a restriction groove 202 having a wide width in the left-right direction. The length in the left-right direction of the restriction groove 202 is slightly longer than the length in the left-right direction of the lower end of the pressing member 21 including the restriction protrusion 212, and the height in the vertical direction of the restriction groove 202 is the restriction protrusion 212. The height is about twice as high as the vertical direction. Therefore, the movement of the push-down member 21 in the vertical direction is restricted when the restriction protrusion 212 of the push-down member 21 is engaged with the restriction groove 202 of the housing 20.

  Furthermore, on the upper surface of the shielding part 210 of the pressing member 21, a single pressed protrusion 210a protruding in the front-rear direction is projected, and the pressed protrusion 210a receives external pressure.

  In the micro switch 2 formed as described above, the pressing operation from the outside received by the controller device 1 is transmitted to the pressing member 21 through the pressed protrusion 210 a as a pressing from the outside of the housing 20. The pressing member 21 receives a pressure from the outside and moves to the lower side which is the inside of the housing 20, and moves to an upper side which is the outside of the housing 20 when the pressure from the outside is released. That is, the pressing member 21 is fitted between the first position on the upper side (outside of the casing 20) and the second position on the lower side (inside of the casing 20) according to the pressing state from the outside. The plywood 211 moves while being guided by the guide groove 201 of the housing 20. The first position as the upper limit and the second position as the lower limit are determined by the restriction by the engagement of the restriction groove 202 of the housing 20 and the restriction protrusion 212 of the pressing member 21.

  Next, the internal structure of the microswitch 2 will be described. FIG. 3 is a schematic perspective sectional view showing an example of a cross section and an appearance of the microswitch 2 described in the present application. FIG. 4 is a schematic cross-sectional view showing an example of a cross section of the microswitch 2 described in the present application. 3 and 4 illustrate the microswitch 2 according to the first embodiment, and shows a cross section cut along a vertical plane including the line AB shown in FIG. 2 toward the arrow direction. Note that FIG. 3 shows a viewpoint from the same direction as FIG. 2, and FIG. 4 shows a viewpoint from the front.

  In the housing 20 of the micro switch 2, an area as a contact chamber 24 for accommodating a contact mechanism 23 that opens and closes an electric circuit as a switch is secured. Above the contact chamber 24, an area for the pressing member 21 to move up and down is secured as the pressing chamber 25. Further, an insertion hole 250 through which the pressing member 21 is inserted is formed in the bottom surface of the pressing chamber 25, and the bottom surface of the pressing chamber 25 and the upper surface of the contact chamber 24 pass through the insertion hole 250.

  In the push-down chamber 25, an inner wall portion 251 that protrudes upward (outside of the housing 20) is formed around the insertion hole 250 formed in the bottom surface, and the inner wall portion 251 surrounds the insertion hole 250. Is enclosed. The height of the inner wall portion 251, that is, the length in the insertion direction of the inner wall portion 251 is formed to be longer than the gap between the insertion opening 200 and the edge of the shielding portion 210.

  A lower portion of the pressing member 21 that moves up and down in the pressing chamber 25 is formed as an insertion portion 213 that is inserted into the insertion hole 250, and a lower end (an inner end toward the housing 20) of the insertion portion 213 is an insertion hole. 250 is inserted into the contact chamber 24. Since the insertion part 213 is inserted into the insertion hole 250 with a slight gap, the pressing member 21 can move up and down while maintaining the state where the insertion part 213 is inserted into the insertion hole 250. . The insertion portion 213 of the pressing member 21 transmits the vertical movement of the pressing member 21 into the contact chamber 24 and acts on the contact mechanism 23 in the contact chamber 24.

  As described above, the plate-shaped shielding portion 210 is formed on the upper portion of the pressing member 21 so as to be inserted with a slight gap with respect to the insertion opening 200. Further, in the push-down member 21, an outer wall portion 210 b that protrudes downward (inside the housing 20) is formed at the edge portion of the shielding portion 210 close to the insertion opening 200.

  The cross-sectional shape of the pressing member 21 formed in this way is formed in a substantially T shape by a shielding portion 210 that is long in the horizontal direction at the top and an insertion portion 213 that extends downward. In addition, the pressing member 21 has a shielding portion 210 that shields the insertion hole 250 on the upper side opposite to the contact chamber 24 with respect to the insertion hole 250. The shielding part 210 is formed so that the viewpoint from above, that is, the shape from the insertion direction of the insertion part 213 covers the insertion hole 250 with an area larger than the insertion hole 250. Therefore, when the micro switch 2 is viewed from the viewpoint from above, the insertion hole 250 is not exposed and is shielded by the shielding part 210. In the housing 20, an insertion hole 250 is formed in the bottom surface of the press-down chamber 25, and an open insertion opening 200 is formed above the press-down chamber 25. Since the pressing member 21 is inserted into the insertion opening 200, the pressing chamber 25 in which the insertion hole 250 is opened is closed by the shielding portion 210 with a slight gap. Since the insertion hole 250 is formed in the approximate center of the bottom surface of the pressing chamber 25, the shielding part 210 covers the insertion hole 250.

  The contact mechanism 23 accommodated in the contact chamber 24 will be described. In the contact chamber 24, members such as a common contact terminal 230, a first contact terminal 231, a second contact terminal 232, and a movable contact piece 233 are disposed as the contact mechanism 23. The common contact terminal 230 is disposed on the left side in the contact chamber 24 and is electrically connected to the connection terminal portion 22 on the left side. The first contact terminal 231 is disposed on the upper right side in the contact chamber 24 and is electrically connected to the right connection terminal portion 22. The second contact terminal 232 is disposed on the lower right side in the contact chamber 24 and is electrically connected to the central connection terminal portion 22.

  The movable contact piece 233 is a plate-like conductive metal member extending in the left-right direction in the contact chamber 24. The left end of the movable contact is a fixed end locked to the common contact terminal 230. The right end of the movable contact is a free end that moves between the first contact terminal 231 and the second contact terminal 232. The movable contact piece 233 is formed as a return spring punched out in the vicinity of the center and bent into an arc shape, and the return spring is fixed in the contact chamber 24.

  In the contact mechanism 23 configured as described above, when the pressing member 21 is pressed, the insertion portion 213 moves downward and presses the movable contact piece 233. When the movable contact piece 233 is pressed, the right end side, which is the free end of the movable contact piece 233, is lowered and contacts the second contact terminal 232. As a result, the left connection terminal portion 22 connected to the common contact terminal 230 and the central connection terminal portion 22 connected to the second contact terminal 232 become conductive.

  When the pressing of the pressing member 21 is released, the movable contact piece 233 is biased upward by the return spring. When the movable contact piece 233 is biased upward, the insertion portion 213 (the pressing member 21) moves upward. Further, when the movable contact piece 233 is biased upward by the return spring, the right end side, which is the free end of the movable contact piece 233, rises and contacts the first contact terminal 231. As a result, the left connection terminal portion 22 connected to the common contact terminal 230 and the right connection terminal portion 22 connected to the first contact terminal 231 become conductive.

  In the drawing, the state in which the pressing member 21 is not pressed is illustrated, but the first contact terminal 231 and the movable contact piece 233 are illustrated slightly apart from each other in order to easily recognize each member. . However, the first contact terminal 231 and the movable contact piece 233 are in contact with each other when the pressing member 21 is not pressed.

  The contact mechanism 23 illustrated in the present application is merely an example of one form of the microswitch 2 described in the present application that can be developed in various forms. Various contact mechanisms 23 that open / close and contact / separate by pressing the insertion portion 213 can be applied to the microswitch 2 of the present application. For example, various techniques such as a mechanism described in Japanese Patent Application Laid-Open No. 2017-16807 disclosed by the applicant of the present application can be applied.

  The function of the microswitch 2 configured as described above according to the first embodiment of the present application will be described. FIG. 5 is a schematic enlarged cross-sectional view showing an example of a partial cross section of the microswitch 2 described in the present application. FIG. 5 is an enlarged cross section centered on the pressing chamber 25 of the microswitch 2 and schematically shows the position of the pressing member 21 and the relationship with other members. FIG. 5A shows a state where the pressing member 21 is not pressed from the outside and is in the upper first position, and FIG. 5B shows the lower side when the pressing member 21 is pressed from the outside. The state in the second position is shown.

  The operation device 1 such as a mouse provided with the microswitch 2 described in the present application may have a gap due to its structure. Even if foreign matter such as lint enters from the gap of the operation device 1, the microswitch 2 is protected by the housing 20 and the contact chamber 24 is accommodated in the housing 20. It is not easy for a foreign object to enter into 24. That is, the contact chamber 24 has a closed structure, and suppresses the occurrence of problems such as poor contact due to foreign matters adhering to members in the contact chamber 24. In the following, the dustproof function of the micro switch 2 will be described assuming a situation in which foreign matter has entered the controller device 1 and assuming a route for the foreign matter to enter the contact chamber 24.

  An insertion hole 250 through which the insertion portion 213 of the pressing member 21 is inserted is formed in the upper portion of the contact chamber 24. However, as shown in FIG. 5 and the like, the insertion portion 250 is shielded by the shielding portion 210 of the pressing member 21, It is not easy for foreign matter to enter the contact chamber 24 through a slight gap between the insertion portion 213 and the insertion hole 250.

  Further, as illustrated in FIG. 5, an outer wall portion 210 b that protrudes downward (inside the housing 20) is formed on the edge in the left-right direction of the shielding portion 210 that is close to the insertion opening 200 of the housing 20. As shown in FIG. 5A, the lower end of the outer wall portion 210 b is inserted into the upper surface of the housing 20 from the insertion opening 200 even when the pressing member 21 is positioned at the upper first position. Located in a low position. That is, the lower end of the edge of the shielding portion 210 adjacent to the insertion opening 200 (the inner end that is the inner tip of the housing 20) is more than the insertion opening 200 when the pressing member 21 is located at the first position. Located on the lower side (inside the housing 20). Thereby, even when the pressing member 21 is raised, the lower end of the shielding part 210 does not rise above the insertion opening 200, and the foreign matter attached to the upper surface of the housing 20 passes below the shielding part 210, This prevents entry into the pressing room 25.

  Further, as shown in FIG. 5B, when the pressing member 21 is located at the lower second position, the lower end of the outer wall portion 210 b (the inner end with respect to the housing 20) is the bottom surface in the pressing chamber 25. Go down to near. Even when the pressing member 21 is positioned at the second lower position, the position of the upper surface of the shielding unit 210 is equal to or higher than the upper surface of the housing 20, so that a depression is generated on the upper surface of the housing 20. No foreign matter remains.

  Even if foreign matter enters the pressing chamber 25 through the gap between the pressing member 21 and the housing 20, the inner wall portion 251 is formed around the insertion hole 250, so that the foreign matter that has entered the pressing chamber 25. However, it is not easy to get over the inner wall portion 251 and enter the contact chamber 24 through the gap between the insertion portion 213 and the insertion hole 250.

  In addition, it is considered that the possibility of causing an abnormality by entering the contact chamber 24 is increased by a foreign matter of 0.1 mm or more. Accordingly, the gap between the insertion opening 200 and the shielding part 210 opened in the housing 20 and the gap between the insertion hole 250 and the insertion part 213 provided in the bottom surface of the pressing chamber 25 in the housing 20 are 0. It is desirable to be less than 1 mm. Further, in order to prevent foreign matter that has entered the pressing chamber 25 from entering the contact chamber 24, the height of the inner wall portion 251 is 0.1 mm or more, that is, the edge of the insertion opening 200 and the shielding portion 210. It is desirable to make it longer than the gap. In addition, it is possible to suppress the intrusion of foreign matter into the contact chamber 24 by designing the gap generated between various members such as the pressing member 21 and the housing 20 to an appropriate size.

  As described above, the microswitch 2 described in the present application has high dustproofness, and even when foreign matter enters the operating device 1, it is difficult for the foreign matter to enter the contact chamber 24 of the microswitch 2. is there. Thereby, it is possible to suppress an abnormality caused by the invading foreign substance, for example, the occurrence of malfunction, and the like.

  In addition, the effect by the microswitch 2 described in this application is not only a dustproof effect. For example, since the pressing member 21 included in the microswitch 2 can be fitted from the outside of the housing 20 after assembling the configuration inside the housing 20, compared to the case where the pressing member 21 is incorporated in the housing 20. Easy to assemble. Therefore, the microswitch 2 described in the present application has excellent effects such as an increase in efficiency related to the assembly process and an increase in yield.

  Further, the pressing member 21 of the micro switch 2 is inserted into the insertion opening 200 with an outer wall portion 210b formed at the edge of the shielding portion 210 of the pressing member 21 with a slight gap therebetween. A guide groove 201 is also formed on the surface. Thereby, when the pressing member 21 is pressed, the insertion portion 213 is inserted straight into the insertion hole 250 without being inclined. Therefore, an excellent effect can be obtained, for example, it is possible to suppress the occurrence of operation failure and operation failure at the time of pressing.

Second Embodiment
The second embodiment has a configuration in which the inner wall portion 251 formed around the insertion hole 250 of the pressing chamber 25 and the outer wall portion 210b formed in the shielding portion 210 of the pressing member 21 in the first embodiment are eliminated. In the following description, the same configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the first embodiment is referred to and description thereof is omitted.

  FIG. 6 is a schematic perspective sectional view showing an example of a cross section and an appearance of the microswitch 2 described in the present application. FIG. 7 is a schematic cross-sectional view showing an example of a cross section of the microswitch 2 described in the present application. 6 and 7 illustrate the microswitch 2 according to the second embodiment. A contact chamber 24 and a push-down chamber 25 are formed in the housing 20 of the microswitch 2, and a push-down member 21 is movably disposed in the push-down chamber 25. A lower portion of the pressing member 21 that moves up and down in the pressing chamber 25 is formed as an insertion portion 213 that is inserted into the insertion hole 250, and a lower end of the insertion portion 213 is inserted into the contact chamber 24 through the insertion hole 250. Has reached. A plate-shaped shielding part 210 is formed on the pressing member 21 so as to be inserted with a slight gap with respect to the insertion opening 200. In the pressing member 21, the outer wall portion 210b as in the first embodiment is not formed at the edge of the shielding portion 210, and the shielding portion 210 is formed with the pressed protrusion 210a and the insertion portion 213. It is formed with a certain thickness except for the part. Further, in the pressing chamber 25, the inner wall portion 251 as in the first embodiment is not formed around the insertion hole 250 formed in the bottom surface, and the bottom surface in the pressing chamber 25 has the insertion hole 250 formed therein. Except for the flat surface.

  In the microswitch 2 according to the second embodiment described above configured as described above, the insertion hole 250 through which the insertion portion 213 of the pressing member 21 is inserted is formed in the upper portion of the contact chamber 24. Therefore, it is possible to prevent foreign matter from entering the contact chamber 24 through a slight gap between the insertion portion 213 and the insertion hole 250. Play. In addition, the micro switch 2 according to the second embodiment has various effects such as not only a dustproof effect but also easy assembly and stable operation of the insertion portion 213.

<Third Embodiment>
The third embodiment has a configuration in which the inner wall portion 251 formed around the insertion hole 250 of the pressing chamber 25 is eliminated in the first embodiment. In the following description, the same configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the first embodiment is referred to and description thereof is omitted.

  FIG. 8 is a schematic perspective sectional view showing an example of a cross section and an appearance of the microswitch 2 described in the present application. FIG. 9 is a schematic cross-sectional view showing an example of a cross section of the microswitch 2 described in the present application. 8 and 9 illustrate the microswitch 2 according to the third embodiment. A contact chamber 24 and a push-down chamber 25 are formed in the housing 20 of the microswitch 2, and a push-down member 21 is movably disposed in the push-down chamber 25. A lower portion of the pressing member 21 that moves up and down in the pressing chamber 25 is formed as an insertion portion 213 that is inserted into the insertion hole 250, and a lower end of the insertion portion 213 is inserted into the contact chamber 24 through the insertion hole 250. Has reached. A plate-shaped shielding part 210 is formed on the pressing member 21 so as to be inserted with a slight gap with respect to the insertion opening 200. Further, in the push-down member 21, an outer wall portion 210 b that protrudes downward is formed at the edge portion of the shielding portion 210 that is close to the insertion opening 200. In the pressing chamber 25, the inner wall portion 251 as in the first embodiment is not formed around the insertion hole 250 formed in the bottom surface, and the bottom surface in the pressing chamber 25 has the insertion hole 250. Except for the flat surface.

  In the microswitch 2 according to the third embodiment of the present invention configured as described above, the insertion hole 250 through which the insertion portion 213 of the pressing member 21 is inserted is formed in the upper portion of the contact chamber 24. Since the outer wall portion 210b is formed at the edge of the shielding portion 210, foreign matter enters the contact chamber 24 from a slight gap between the insertion portion 213 and the insertion hole 250. It is possible to prevent the intrusion from entering, and so on. In addition, the micro switch 2 according to the third embodiment has various effects such as not only a dustproof effect but also easy assembly and stable operation of the insertion portion 213.

<Fourth embodiment>
The fourth embodiment has a configuration in which the outer wall portion 210b formed in the shielding portion 210 of the pressing member 21 is eliminated in the first embodiment. In the following description, the same configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the first embodiment is referred to and description thereof is omitted.

  FIG. 10 is a schematic perspective sectional view showing an example of a cross section and an appearance of the microswitch 2 described in the present application. FIG. 11 is a schematic cross-sectional view showing an example of a cross section of the microswitch 2 described in the present application. 10 and 11 illustrate the microswitch 2 according to the fourth embodiment. A contact chamber 24 and a push-down chamber 25 are formed in the housing 20 of the microswitch 2, and a push-down member 21 is movably disposed in the push-down chamber 25. A lower portion of the pressing member 21 that moves up and down in the pressing chamber 25 is formed as an insertion portion 213 that is inserted into the insertion hole 250, and a lower end of the insertion portion 213 is inserted into the contact chamber 24 through the insertion hole 250. Has reached. A plate-shaped shielding part 210 is formed on the pressing member 21 so as to be inserted with a slight gap with respect to the insertion opening 200. In the pressing member 21, the outer wall portion 210b as in the first embodiment is not formed at the edge of the shielding portion 210, and the shielding portion 210 is formed with the pressed protrusion 210a and the insertion portion 213. It is formed with a certain thickness except for the part. Further, in the push-down chamber 25, an inner wall portion 251 that protrudes upward is formed around the insertion hole 250 formed on the bottom surface, and the inner wall portion 251 surrounds the periphery of the insertion hole 250. .

  In the microswitch 2 according to the second embodiment described above configured as described above, the insertion hole 250 through which the insertion portion 213 of the pressing member 21 is inserted is formed in the upper portion of the contact chamber 24. Since the inner wall portion 251 is formed around the insertion hole 250, foreign matter enters the contact chamber 24 from a slight gap between the insertion portion 213 and the insertion hole 250. There are excellent effects such as being able to prevent entry. In addition, the micro switch 2 according to the fourth embodiment has various effects such as not only a dustproof effect but also easy assembly and stable operation of the insertion portion 213.

  As described above, the operation device 1 and the micro switch 2 described in the present application by illustrating various forms prevent foreign matter from entering the contact chamber 24 that houses the contact mechanism 23 that opens and closes the electric circuit, and malfunction due to the foreign matter. There are various effects such as suppressing the occurrence of abnormalities.

  The present invention is not limited to the embodiments described above, and can be implemented in various other forms. Therefore, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The technical scope of the present invention is described by the scope of claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  Specifically, as exemplified as the first to fourth embodiments, it can be developed in various forms.

  In the above-described embodiment, the mouse is illustrated as the operation device 1 including the microswitch 2. However, the present invention is not limited to this, and various devices such as a keyboard and various push buttons used for the operation are used as the operation device 1. It can be applied to various forms such as being applicable.

DESCRIPTION OF SYMBOLS 1 Operation apparatus 10 Pushing operation part 12 Signal line 2 Microswitch 20 Case 200 Insertion opening 21 Pushing member 210 Shielding part 210b Outer wall part 213 Insertion part 23 Contact mechanism 24 Contact room 25 Pushdown room 250 Insertion hole 251 Inner wall part

Claims (6)

A contact chamber that houses a contact mechanism that opens and closes an electric circuit; a housing that houses the contact chamber; and a pressing member that receives pressure from outside the housing, the pressing member being opened in the contact chamber An insertion portion that is inserted through the inserted insertion hole and acts on the contact mechanism, and the insertion portion moves between an outer first position and an inner second position according to a pressing state from the outside. A microswitch,
The pressing member is
On the side opposite to the contact chamber with respect to the insertion hole, there is a shielding part that shields the insertion hole,
The said switch part is formed so that the shape from the insertion direction may cover the said insertion hole. The microswitch characterized by the above-mentioned. The microswitch according to claim 1,
The housing is provided with an insertion port into which the shielding portion is movably fitted with the movement of the pressing member,
An inner end of an edge portion of the shielding portion adjacent to the insertion port is positioned on an inner side of the insertion port when the pressing member is positioned at the first position. The microswitch according to claim 1 or 2,
The shielding portion has a plate shape,
The microswitch characterized by the outer wall part which protrudes toward the inner side being formed in the edge part of the said shielding part. A microswitch according to any one of claims 1 to 3, wherein
An inner wall portion that protrudes outward is formed around the insertion hole. A microswitch according to claim 2 or claim 3, wherein
An inner wall portion protruding outward is formed around the insertion hole,
The length of the inner wall portion in the insertion direction is longer than the gap between the insertion port and the edge of the shielding portion. A pressing operation unit that accepts an external pressing operation;
The microswitch according to any one of claims 1 to 5, wherein the pressing operation received by the pressing operation unit is transmitted as an external press.
An operation device that outputs a signal based on an operation of a contact mechanism provided in the microswitch.

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