JP2007005150A - Switch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch device having a small number of components, simple in assembly work and allowing a key top to be surely and solidly attached thereto. <P>SOLUTION: A lower button 10 arranged on a key contact member 2 in an apparatus case 1 includes: a plate-like member 13 slantly deforming in contacting/separating directions with respect to the inside surface of an upper button 11; and engagement projections 14 formed on the outside surface of the plate-like member 13. The upper button 11 fitted to the lower button 10 includes: engagement slots 16 engaging with the engagement projections 14 of the plate-like member 13; and restriction members 17 coming into contact with the inside surface of the plate-like member 13 to stop the slant deformation of the plate-like member 13 when the engagement projections 14 engage with the engagement slots 16. Accordingly, when the upper button 11 is fitted to the lower button 10, the engagement projections 14 can be engaged with the engagement slots 16 of the upper button 11 by slantly deforming the plate-like member 13, and the slant deformation of the plate-like member 13 can be stopped by the restriction members 17 of the upper button 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a switch device such as a keyboard or a key switch used in an electronic device such as an electronic dictionary or a calculator.

  For example, in an electronic device such as an electronic dictionary, the key top of a keyboard that is a switch device differs depending on the model. For this reason, in such an electronic device, parts other than the key top of the keyboard are assembled in advance to produce a semi-finished product, and a key top corresponding to the model is assembled at the time of shipment to make the finished product.

As such a switch device, as described in Patent Document 1, a semi-finished product is manufactured by attaching a holder plate corresponding to each key on a circuit board previously arranged on a switch support plate, In this state, a guide support member composed of the first and second ring members is assembled on the holder plate, and a key top is disposed on the guide support member and pushed down from above, whereby each of the first and second ring members is engaged. The locking pin is inserted into each locking groove of the holder plate, and the locking rod of the first ring member and the locking pin of the second ring member are inserted into each locking groove of the key top, thereby assembling the key top. And finished products.
JP 2003-346586 A

  However, in such a conventional switch device, a holder plate is previously mounted on a circuit board placed on a switch support plate, so that parts other than the key top are assembled into a semi-finished product state, and depending on the model at the time of shipment. Even if the key top can be assembled into a finished product, in order to assemble the key top, a guide support member composed of the first and second ring members is required, and this guide support member is attached to the holder plate. Since the key top must be assembled to the holder plate by this guide support member, there are problems that the number of parts is large, the structure is complicated, and the assembling work is complicated.

  The problem to be solved by the present invention is to provide a switch device that can be attached securely and firmly with a small number of parts, an easy assembling operation, and a firm and reliable operation.

In order to solve the above problems, the present invention includes the following components.
In addition, the reference numerals of the drawings attached to the respective components described in the section of the embodiment described later are attached to the respective components together with parentheses.

As shown in FIGS. 1 to 8, the invention described in claim 1 includes a lower button (10) disposed on a switch member (key contact member 2) in the device case (1), and the lower button. A switch device comprising an upper button (11) that is fitted and partially exposed to the outside of the device case,
The lower button includes a plate-like member (13) that is inclined and deformed in the contact / separation direction with respect to the inner surface (11a) of the upper button, and a first engagement portion (on the outer surface (13a) of the plate-like member ( Engaging projections 14),
The upper button is engaged with a second engagement portion (engagement groove 16) with which the first engagement portion of the plate-like member is engaged, and the second engagement portion and the first engagement portion. And a restricting member (17) that contacts the inner side surface (13b) of the plate member and prevents the plate member from being inclined and deformed.

1 to 8, the plate-like member (13) has an inclined notch pressing portion (15) whose width gradually increases from the upper end portion toward the lower side. ), And when the upper button (11) is fitted to the lower button (10), the upper button (11) is inclined and deformed in a direction away from the inner surface (11a) of the upper button, and the first and second engaging portions ( When the engagement protrusion 14 and the engagement groove 16) are engaged, the structure returns elastically to the original position.
The restricting member (17) is bent and deformed by being pressed at an edge of the notch pressing portion of the plate-like member when the plate-like member is inclined and deformed, and the plate-like member is elastically restored and the notch pressing is performed. 2. The switch device according to claim 1, wherein the switch device is configured to elastically return to its original position and come into contact with the inner side surface (13 b) of the plate-like member when the edge of the portion is detached.

  As shown in FIGS. 1 to 8, the invention described in claim 3 is provided with the plate-like member (13) standing substantially in parallel with the plate member (13) approaching the inner surface (11a) of the upper button (11). The first engaging portion is an engaging protrusion (14) provided on the outer surface (13a) of the plate-like member, and the restricting member (17) is formed in a plate shape orthogonal to the plate-like member. In the state where the end face (17a) of the side portion is formed so as to be able to contact the inner side face (13b) of the plate-like member, it is provided so as to be able to bend and deform in a direction perpendicular to the inclination deformation of the plate-like member. The switch device according to claim 2, wherein the second engagement portion is an engagement groove (16) provided on a side portion of the upper button and engaged with the engagement protrusion. .

As shown in FIGS. 1 to 8, the invention according to claim 4, as shown in FIGS. 1 to 8, in the first stage, the lower button (on the key contact member 2) disposed in the device case (1). 10) so that the upper button (11) is covered from above, and the engaging protrusion (14) provided on the outer surface (13a) of the plate-like member (13) of the lower button is inserted into the upper button. Insert it into the inner surface (11a) of the upper button,
In the second stage, the upper button is further pushed in, and the plate-like member is inclined and deformed in a direction away from the inner surface of the upper button by the engagement protrusion contacting the inner surface of the upper button. The edge of the notch pressing part (15) is brought into contact with the inner surface (17b) of the restricting member (17) of the upper button,
In the third stage, the upper button is further pushed in, the plate-like member is further inclined and deformed, the inner surface (17b) of the restricting member is pressed by the edge of the notch pressing portion, and the restricting member is moved to the plate Bend toward the side of the shaped member,
In the fourth stage, when the upper button is further pushed in and the engagement protrusion of the plate-like member is engaged with the engagement groove (16) of the upper button, the plate-like member returns to its original position elastically. Then, the edge portion of the notch pressing portion is detached from the restricting member, and the restricting member is elastically returned to the original position along with this, and the end face (17a) of the side portion of the restricting member is the plate-like member. 4. The switch device according to claim 3, wherein the switch is attached to the lower button by contacting the inner side surface (13 b) to prevent the plate-like member from being tilted and deformed. 5.

  According to the first aspect of the present invention, the lower button disposed on the switch member in the device case has a plate-like member that is inclined and deformed in the contact / separation direction with respect to the inner surface of the upper button, and the outer side of the plate-like member. A first engaging portion provided on the side surface, and an upper button that is fitted to the lower button and is partially exposed to the outside of the device case engages with the first engaging portion of the plate-like member. By having two engaging portions and a regulating member that abuts on the inner surface of the plate-like member when the first and second engaging portions are engaged and prevents inclination deformation of the plate-like member, When the upper button is fitted to the lower button on the switch member from above, the plate member of the lower button is tilted and the first engagement portion of the lower button is engaged with the second engagement portion of the upper button. As a result, the restricting member of the upper button prevents the plate member from being tilted, so that the upper button can be fitted to the lower button from above with a small number of parts. Rudake easily assembled it can, Therefore good productivity, can be attached securely and firmly with a small fitting allowance between the lower button and the top button.

  According to the invention described in claim 2, when the plate-shaped member has an inclined notch pressing portion that gradually increases in width from the upper end portion toward the lower side, and the upper button is fitted to the lower button. Is inclined and deformed in a direction away from the inner surface of the upper button, and when the first and second engaging portions are engaged, the regulating member is elastically returned to the original position. When pressed at the edge of the notch pressing portion of the plate-like member and bent and deformed, when the plate-like member is elastically restored and the edge of the notch-pressing portion is detached, the plate-like member is elastically restored to its original position and By being in contact with the inner surface, the regulating member can be bent and deformed in conjunction with the tilt deformation of the plate-like member.

  That is, when the upper button is fitted to the lower button, if the plate member is inclined and deformed in the direction away from the inner surface of the upper button, the edge of the notch pressing portion of the plate member is formed on the inner surface of the restricting member. When the plate-shaped member is further abutted and deformed in this state, the regulating member can be bent and deformed by the edge portion of the notch pressing portion. Further, when the first and second engaging portions are engaged and the plate-like member is elastically returned to the original position, the edge of the notch pressing portion of the plate-like member is detached from the restricting member. Since the restricting member comes into contact with the inner surface of the plate-like member, the lower button and the upper button can be fitted and killed. The button can be assembled to the lower button.

  According to the invention described in claim 3, the plate-like member is provided to stand substantially parallel in a state of being close to the inner surface of the upper button, and the first engagement portion is provided on the outer surface of the plate-like member. Inclined deformation of the plate-shaped member in a state where the restricting member is formed in a plate shape orthogonal to the plate-shaped member and the end face of the side portion is made to contact the inner surface of the plate-shaped member. The second button is provided on the side of the upper button so that it can be bent and deformed. When engaging, the engaging projection of the plate-shaped member comes into contact with the inner surface of the upper button, and the plate-shaped member can be inclined and deformed in a direction away from the inner surface of the upper button.

  Accordingly, the edge of the notch pressing portion of the plate-like member abuts on the inner surface of the restriction member, and the restriction member is bent and deformed in a direction orthogonal to the inclination deformation of the plate-like member. It can be bent and deformed toward the side of. Further, when the engaging protrusion is engaged with the engaging groove, the plate-like member is elastically returned to the original position, and the edge of the notch pressing portion of the plate-like member is detached from the restricting member. Since the end surface of the side portion of the restricting member comes into contact with the inner surface of the plate member, the restricting member can surely prevent the plate member from being inclined and deformed. For this reason, the upper button and the lower button can be assembled smoothly and reliably with a small fitting allowance.

  According to the invention described in claim 4, in the first stage, the upper button is pushed into the lower button arranged on the switch member in the equipment case so as to cover from above, and is provided on the outer surface of the plate-like member of the lower button. The engagement protrusion is inserted into the upper button and brought into contact with the inner surface of the upper button. In the second stage, the upper button is further pushed in, and the plate-like member is moved to the upper button by the engagement protrusion that is in contact with the inner surface of the upper button. Inclined and deformed in a direction away from the inner surface, the edge of the notch pressing portion of the plate-like member is brought into contact with the inner surface of the upper button regulating member, and the upper button is further pushed in the third stage, and the plate-like member is further pushed Inclining deformation, pressing the inner surface of the restricting member at the edge of the notch pressing portion, bending the restricting member toward the side of the plate-like member, and further pushing the upper button in the fourth stage, the plate-like member When the engagement protrusion of the plate is engaged with the engagement groove of the upper button, the plate-like member is returned to its original position. The edge of the notch pressing part is detached from the restricting member, and the restricting member is elastically returned to the original position, and the end surface of the side part of the restricting member comes into contact with the inner surface of the plate-like member. Therefore, the upper button can be easily and reliably assembled to the lower button with a simple operation of pushing the upper button into the lower button.

Hereinafter, an embodiment in which the present invention is applied to a switch device of an electronic device will be described with reference to FIGS.
1 is an enlarged perspective view showing a main part of a switch device of an electronic apparatus to which the present invention is applied, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is a perspective view showing a key top of FIG. 4 and FIG. 4 are perspective views in which a part of the key top of FIG. 3 is broken, and FIGS. 5 to 8 are views showing the assembly process.

  As shown in FIGS. 1 and 2, the switch device is a keyboard of an electronic device such as an electronic dictionary, and includes a key contact member 2 disposed in the device case 1, and a key top on the key contact member 2. 3 is configured such that the upper portion of the key top 3 protrudes upward from the opening 1a of the device case 1 and is exposed. As shown in FIG. 2, the key contact member 2 includes a plurality of openings 1 a in which a rubber sheet 6 is disposed on a circuit board 5 and a dome-shaped bulge 7 is provided in the device case 1. (Only one is shown in FIG. 2).

  In this case, as shown in FIG. 2, a movable contact 8 is provided inside the dome-shaped bulging portion 7, and a pair of fixed contacts 9 are in contact with the movable contact 8 on the upper surface of the circuit board 5. It is provided facing away. As a result, when the dome-shaped bulge 7 in FIG. 2 is pushed down by the key top 3, the key contact member 2 is elastically deformed and the movable contact 8 contacts the pair of fixed contacts 9. Thus, the switch signal is output.

  As shown in FIGS. 2 to 8, the key top 3 includes a lower button 10 made of a synthetic resin disposed on the key contact member 2 in the device case 1, and a lower portion 10 fitted to the lower button 10 so that the upper portion is a device. A substantially box-shaped upper button 11 made of a synthetic resin that protrudes upward from the opening 1a of the case 1 and is exposed is provided. The lower button 10 includes a flat plate portion 12 disposed on the bulging portion 7 of the key contact member 2 and a pair of plate-like members that are integrally provided on both sides of the upper surface of the flat plate portion 12 so as to be inclined and deformable. Member 13 (only one is shown in FIG. 2 to FIG. 8), and an engagement protrusion 14 is provided on each outer side surface 13 a of the pair of plate-like members 13.

  In this case, as shown in FIG. 2, the flat plate portion 12 is formed to be slightly larger than the opening portion 1 a of the device case 1, so that the upper surface of the peripheral portion of the flat plate portion 12 is the edge portion of the opening portion 1 a of the device case 1. The flat plate portion 12 is configured so as not to come out of the opening portion 1a. Further, as shown in FIGS. 5A and 5B, the plate-like member 13 is provided upright on the flat plate portion 12 in a state of approaching substantially parallel to the inner surface 11a of the upper button 11, Both upper sides are formed in an inclined shape that gradually increases in width from the upper end toward the lower side, whereby notch pressing portions 15 are formed on both sides of the upper portion, respectively. As shown in FIG. It is comprised so that it may be inserted and arranged in the inside from the lower side. The notch pressing portion 15 does not have to be linearly inclined, but may be an arcuate curved inclination.

  The upper button 11 is formed in a substantially box shape to which the lower button 10 is fitted, as shown in FIGS. 2 to 4, and the engaging projections 14 of the pair of plate-like members 13 are engaged from the inside on both sides. A pair of engaging grooves 16 are provided, and a pair of plate members 13 are prevented from being inclined and deformed when the engaging protrusions 14 and the engaging grooves 16 are engaged with the inner upper surface. The restriction member 17 is integrally provided. In this case, the pair of plate-like members 13 are pressed by the engaging protrusions 14 when the engaging protrusions 14 come into contact with the inner surface 11 a of the upper button 11 when the upper button 11 is fitted to the lower button 10. The upper button 11 is configured to be inclined and deformed in a direction away from the inner surface 11a, and to be elastically returned to the original position when the engagement protrusions 14 and the engagement grooves 16 are engaged.

  As shown in FIGS. 5A and 5B, the pair of regulating members 17 is formed in a plate shape orthogonal to each plate-like member 13, and is positioned between the pair of plate-like members 13. Each end face 17a on both sides of the pair of plate-like members 13 is adapted to come into contact with the mutually opposing inner side surfaces 13b. In this state, the end faces 17a are bent and deformed in a direction perpendicular to the inclination deformation of the pair of plate-like members 13. Is configured to do. Further, the pair of regulating members 17 are provided on the inner upper surface of the upper button 11 in a state of being parallel to each other at intervals at which the upper end portions of the plate-like members 13, that is, the upper end portions of the notch pressing portions 15 are inserted.

  Accordingly, as shown in FIGS. 6A and 6B, the pair of regulating members 17 is formed when the pair of plate-like members 13 are inclined and deformed in the direction away from the inner surface 11 a of the upper button 11. The upper ends of the plate-like members 13 are inserted between the pair of restricting members 17, and the edges of the notch pressing portions 15 of the pair of plate-like members 13 are formed on the inner surfaces 17 b of the pair of restricting members 17 facing each other. In this state, as shown in FIGS. 7A and 7B, the pair of regulating members 17 are separated from each other by the edge portions of the notch pressing portions 15 according to the inclination deformation of the plate-like members 13. The pair of restricting members 17 are configured to bend and deform toward both sides of each plate-like member 13.

  In addition, as shown in FIGS. 8A and 8B, the pair of restricting members 17 is such that the engaging projections 14 of the pair of plate-like members 13 are engaged with the engaging grooves 16 of the upper button 11. When the plate-like members 13 are elastically returned to the original positions, that is, the positions close to the inner surface 11 a of the upper button 11 in parallel, the notch pressing portions 15 of the plate-like members 13 are located between the pair of regulating members 17. The pair of regulating members 17 are elastically returned to their original positions and positioned between the pair of plate-like members 13, and as shown in FIG. 2, the end surfaces 17 a of the pair of regulating members 17 are plate-like members 13. It is comprised so that it may contact | abut to the inner surface 13b of this, and inclination deformation | transformation of a pair of plate-shaped member 13 may be prevented.

Next, the case where the key top 3 of this switch device is assembled will be described.
In this case, as shown in FIG. 2, the movable contact 8 in each bulging portion 7 of the rubber sheet 6 is opposed to the pair of fixed contacts 9 on the circuit substrate 5 in advance. A rubber sheet 6 is provided to the key contact member 2. And the lower button 10 of the key top 3 is arrange | positioned on each bulging part 7 in the rubber sheet 6 of this key contact member 2, and the key contact member 2 and the lower button 10 are integrated in the apparatus case 1 in this state. At this time, the rib 1b provided on the lower surface of the device case 1 is pressed around the bulging portion 7 of the rubber sheet 6, and the lower button 10 is made to correspond to the opening 1a of the device case 1 so that the pair of lower buttons 10 The plate-like member 13 is inserted into the opening 1a. Thereby, the switch device is manufactured as a semi-finished product.

  Then, when shipping, the upper button 11 of the key top 3 corresponding to the model is attached to the lower button 10 from the upper outside of the device case 1 to make a finished product. At this time, first, in the first stage shown in FIG. 5A and FIG. 5B, the upper button 11 is pushed into the lower button 10 arranged on the key contact member 2 so as to cover the lower button 10 from above. Each of the engaging projections 14 provided on the outer side surface 13a of the pair of plate-like members 13 provided in is inserted into the upper button 11 and comes into contact with the inner surfaces 11a of the upper button 11 facing each other.

  In this state, when the upper button 11 is further pushed in the second stage shown in FIGS. 6A and 6B, a pair of plate-like shapes are formed by the engagement protrusions 14 that are in contact with the inner surfaces 11 a of the upper button 11. The member 13 is inclined and deformed in a direction away from the inner surface 11 a of the upper button 11. Accordingly, the upper ends of the pair of plate-like members 13, that is, the upper end portions of the notch pressing portions 15 are respectively inserted between the pair of regulating members 17 provided on the upper button 11, and The edge of the notch pressing portion 15 abuts against the inner surfaces 17b of the pair of regulating members 17 facing each other.

  Thereafter, when the upper button 11 is further pushed in the third stage shown in FIGS. 7A and 7B, the pair of plate-like members 13 are further inclined and accordingly, each plate-like member 13 is deformed. The notch pressing portions 15 are further pushed between the pair of restricting members 17 to spread the pair of restricting members 17. As a result, the pair of regulating members 17 are bent and deformed in directions away from each other. That is, as shown in FIG. 7B, the pair of restricting members 17 is configured such that the inner surface 17 b of the restricting member 17 is pushed by the edge of each notch pressing portion 15 of the plate-like member 13. Deforms and deforms toward both ends.

  When the upper button 11 is further pushed in the fourth stage shown in FIGS. 8A and 8B, the engagement protrusions 14 of the pair of plate-like members 13 become the engagement grooves 16 of the upper button 11. Respectively. Then, the pair of plate-like members 13 are elastically returned to the original positions, that is, the positions approaching substantially parallel to the inner surface 11a of the upper button 11, and the notch pressing portions 15 of the pair of plate-like members 13 are paired with a pair of regulating members. Leaves 17 each. As a result, the pair of regulating members 17 is elastically restored to the original state and disposed between the pair of plate-like members 13, and the end surfaces 17 a of the pair of regulating members 17 are connected to the inner side surfaces 13 b of the pair of plate-like members 13. It abuts and prevents the pair of plate-like members 13 from being inclined and deformed. As a result, the upper button 11 of the key top 3 corresponding to the model is attached to the lower button 10 to be a finished product.

  As described above, according to this switch device, the lower button 10 disposed on the key contact member 2 in the device case 1 is inclined and deformed in the contact / separation direction with respect to the inner surface 11a of the upper button 11; And an engaging projection 14 provided on the outer surface 13a of the plate-like member 13, and an upper button 11 fitted to the lower button 10 engages with the engaging projection 14 of the plate-like member 13. And a regulating member 17 that contacts the inner side surface 13b of the plate-like member 13 and prevents the plate-like member 13 from being inclined and deformed when the engagement protrusion 14 and the engagement groove 16 are engaged. Therefore, when the upper button 11 is fitted to the lower button 10 disposed on the key contact member 2 in the device case 1 from above, the plate-like member 13 of the lower button 10 is inclined and deformed. The engagement protrusion 14 of the button 10 can be engaged with the engagement groove 16 of the upper button 11. Thus, the restricting member 17 of the upper button 11 prevents the plate member 13 from being inclined and can be easily assembled with only a small number of parts by fitting the upper button 11 to the lower button 10. Therefore, productivity is good and the lower button 10 and the upper button 11 can be securely and firmly attached with a small fitting allowance.

  In this case, the plate-like member 13 has an inclined notch pressing portion 15 that gradually increases in width from the upper end portion toward the lower side, and when the upper button 11 is fitted to the lower button 10, the upper button 11. Inclined and deformed in a direction away from the inner surface 11a of the button, and when the engagement protrusion 14 and the engagement groove 16 are engaged with each other, the original position, that is, the position close to being substantially parallel to the inner surface 11a of the upper button 11 is elastically restored. Thus, when the plate-like member 13 is inclined and deformed, the restricting member 17 is pressed and bent at the edge of the notch pressing portion 15 of the plate-like member 13, and the plate-like member 13 is elastically restored and the notch pressing portion 15. When the edge portion of the plate member 13 is detached from the restriction member 17, the restriction member is elastically returned to the original position and comes into contact with the inner surface 13 b of the plate member 13. 17 can be bent and deformed.

  That is, when the upper button 11 is fitted to the lower button 10, if the plate-like member 13 is inclined and deformed in a direction away from the inner surface 11 a of the upper button 11, the edge of the notch pressing portion 15 of the plate-like member 13. Comes into contact with the inner surface 17b of the regulating member 17, and when the plate-like member 13 is further inclined and deformed in this state, the regulating member 17 can be bent and deformed by the edge of the notch pressing portion 15. Further, when the engagement protrusion 14 and the engagement groove 16 are engaged and the plate-like member 13 is elastically returned to the original position, the edge of the notch pressing portion 15 of the plate-like member 13 is detached from the regulating member 17. Therefore, the regulating member 17 can be elastically returned to the original position, and thereby the end surface 17a of the side portion of the regulating member 17 can be brought into contact with the inner side surface 13b of the plate-like member 13. The upper button 11 can be fitted and killed, so that the upper button 11 can be securely and firmly assembled to the lower button 10.

  Further, the plate-like member 13 is erected substantially in parallel with the inner surface 11a of the upper button 11 being approached, the engaging projection 14 is provided on the outer surface 13a of the plate-like member 13, and the restricting member 17 is a plate. The plate member 13 is formed in a plate shape orthogonal to the plate-like member 13, and the side surface 17 a of the plate-like member 13 is brought into contact with the inner side surface 13 b of the plate-like member 13 so as to be able to come into contact therewith. When the upper button 11 is fitted to the lower button 10, the engagement of the plate-like member 13 is provided. The protrusion 14 comes into contact with the inner surface 11 a of the upper button 11, and the plate member 13 can be reliably tilted and deformed in a direction away from the inner surface 11 a of the upper button 11.

  As a result, the edge of the notch pressing portion 15 of the plate-like member 13 comes into contact with the inner side surface 17b of the restricting member 17, and the restricting member 17 is bent and deformed in a direction orthogonal to the inclination deformation of the plate-like member 13. The regulating member 17 can be bent and deformed toward the side of the plate-like member 13. Further, when the engagement protrusion 14 is fitted into the engagement groove 16, the plate-like member 13 is elastically returned to the original position, and the edge of the notch pressing portion 15 of the plate-like member 13 is detached from the regulating member 17. The restricting member 17 can be elastically returned to the original position, whereby the side end surface 17a of the restricting member 17 abuts on the inner side surface 13b of the plate-like member 13, so that the restricting member 17 tilts the plate-like member 13. Deformation can be reliably prevented, so that the upper button 11 and the lower button 10 can be assembled smoothly and reliably with a small fitting allowance.

  In the above embodiment, the case where the engagement protrusion 14 is provided on the plate-like member 13 of the lower button 10 and the fitting groove 16 is provided on the upper button 11 has been described. The engagement member 16 may be provided in the shaped member 13 and the engagement protrusion 14 may be provided in the upper button 11. Even in such a configuration, when the upper button 11 is attached to the lower button 10, the engagement protrusion 14 of the upper button 11 presses the plate-like member 13 of the lower button 10 and is directed away from the inner surface 11 a of the upper button 11. Therefore, the same effect as the above-described embodiment can be obtained.

  In the above-described embodiment, the case where the pair of restricting members 17 is provided at a position located between the pair of plate-like members 13 on the inner upper surface of the upper button 11 is described. However, the pair of restricting members 17 need not necessarily be provided. Instead, a configuration in which only one regulating member 17 is provided at a position located between the pair of plate-like members 13 on the inner upper surface of the upper button 11 may be adopted. Even with such a configuration, the same effect as the above-described embodiment can be obtained.

It is an enlarged perspective view of the principal part which applied this invention to the switch apparatus of an electronic device. It is sectional drawing in the AA arrow of FIG. It is the external appearance perspective view which showed the key top of FIG. FIG. 4 is a perspective view of a state in which a part of the key top of FIG. 3 is broken. 2 shows a first stage when the upper button is attached to the lower button of FIG. 2, wherein (a) is a front view of a part of the state seen from the front side in FIG. 4, and (b) is from the right side in FIG. It is the side view which fractured | ruptured a part of the state seen. 5 shows a second stage in which the upper button is further pushed in the state of FIG. 5, (a) is a front view in which a part of the state viewed from the front side in FIG. 4 is broken, and (b) is a view from the right side in FIG. It is the side view which fractured | ruptured one part of the state. 6 shows a third stage in which the upper button is further pushed in the state of FIG. 6, (a) is a front view in which a part of the state seen from the front side in FIG. 4 is broken, and (b) is a right side view in FIG. It is the side view which fractured | ruptured one part of the state. FIG. 7 shows a fourth stage in which the upper button is further pushed in the state of FIG. 7, (a) is a front view in which a part of the state seen from the front side in FIG. 4 is broken, and (b) is a right side view in FIG. It is the side view which fractured | ruptured one part of the state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Apparatus case 1a Opening part 2 Key contact member 3 Key top 10 Lower button 11 Upper button 13 Plate member 14 Engagement protrusion 15 Notch pressing part 16 Fitting groove 17 Restriction member 17a End surface

Claims (4)

A switch device comprising a lower button disposed on a switch member in a device case, and an upper button that is fitted to the lower button and a part of the button is exposed to the outside of the device case,
The lower button includes a plate-like member that is inclined and deformed in an approaching / separating direction with respect to the inner surface of the upper button, and a first engagement portion provided on an outer surface of the plate-like member,
The upper button has a plate-like shape when a second engagement portion with which the first engagement portion of the plate-like member is engaged, and when the second engagement portion and the first engagement portion are engaged with each other. And a restricting member that abuts against an inner surface of the member to prevent the plate-like member from being inclined and deformed. The plate-like member has an inclined notch pressing portion that gradually increases in width from the upper end portion toward the lower side, and moves away from the inner surface of the upper button when the upper button is fitted to the lower button. In a configuration that is inclined and deformed in the direction and elastically returns to the original position when the first and second engaging portions are engaged,
When the plate-like member is inclined and deformed, the restricting member is pressed and bent and deformed by the edge of the notch pressing portion of the plate-like member, and the plate-like member is elastically restored and the edge of the notch pressing portion. 2. The switch device according to claim 1, wherein the switch device is configured to elastically return to an original position and come into contact with an inner surface of the plate-like member when the portion is detached.   The plate-like member is provided upright substantially parallel to the inner surface of the upper button, and the first engagement portion is an engagement protrusion provided on the outer surface of the plate-like member, The member is formed in a plate shape orthogonal to the plate-like member, and is orthogonal to the inclination deformation of the plate-like member in a state in which the end surface of the side portion is made to contact the inner side surface of the plate-like member. The second engagement portion is an engagement groove that is provided on a side portion of the upper button and engages with the engagement protrusion. Switch device. In the first step, the engaging member provided on the outer surface of the plate-like member of the lower button is pushed into the lower button disposed on the switch member in the device case so as to cover the upper button from above. Insert the mating protrusion into the upper button to contact the inner surface of the upper button,
In the second stage, the upper button is further pushed in, and the plate-like member is inclined and deformed in a direction away from the inner surface of the upper button by the engagement protrusion contacting the inner surface of the upper button. The edge of the notch pressing part is brought into contact with the inner surface of the restriction member of the upper button,
In the third stage, the upper button is further pushed in, the plate-like member is further inclined and deformed, the inner surface of the restricting member is pressed by the edge of the notch pressing portion, and the restricting member is moved to the plate-like member. Bend and deform toward the side,
In the fourth stage, when the upper button is further pushed in and the engagement protrusion of the plate-like member is engaged with the engagement groove of the upper button, the plate-like member is elastically returned to its original position and the The edge of the notch pressing part is detached from the regulating member, and the regulating member is elastically returned to the original position along with this, and the end surface of the side part of the regulating member comes into contact with the inner side surface of the plate-like member. The switch device according to claim 3, wherein the plate-like member is prevented from being inclined and thereby the upper button is attached to the lower button.

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