JP5868220B2 - Push-type switch device and electronic device - Google Patents

Description

  The present invention relates to a pressing switch device provided in an electronic device such as a digital camera or a digital video camera, and an electronic device including the pressing switch device.

  As a conventional pressing switch device, a support arm is extended from a base portion fixed to a fixing member, a key top of a pressing button is connected to a side portion of the supporting arm, and an upper surface of a receiving member is attached to a tip portion of the supporting arm. There has been proposed a press button member provided with a convex portion that comes into contact with the press button member. In this proposal, even in the case of a large-sized push button, the convex portion abuts on the upper surface of the receiving member, thereby suppressing the tilt in the extending direction of the support arm when the push button is pressed and ensuring a stable operation feeling. (Patent Document 1).

JP 2010-33894 A

  By the way, in the said patent document 1, the press button member comprised from a base | substrate part, a support arm, an operation button part, a convex part, etc. is integrally formed by resin molding. However, due to a dimensional error in the press button member that is a resin molded product, a dimensional error in the mounting position of the substrate with which the convex portion abuts, the convex portion provided at the tip of the support arm during assembly is separated from the upper surface of the substrate. there is a possibility. For this reason, when the operation button part is pressed, rattling occurs, and the operability may be reduced.

  Moreover, in the said patent document 1, the press button member is positioned and fixed with respect to a fixing member by press-fitting etc. the hole part formed in the base | substrate part in the axial part formed in the fixing member. However, when the fixing member is a molded product such as a resin, it is necessary to use a slide mold as the fixing member mold unless the fixing direction of the pressing button member is the same as the releasing direction after the fixing member is molded. The mold structure becomes complicated and the manufacturing cost is high. Therefore, in order to keep the manufacturing cost low, the fixing direction of the pressing button member and the releasing direction of the fixing member have to be the same, and there is a problem that the degree of freedom in design is low.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a mechanism for preventing the rattling at the time of pressing the operation button portion of the pressing switch device and improving the degree of design freedom while keeping the manufacturing cost low. .

  In order to achieve the above object, a pressing switch device according to the present invention includes a fixing member having a holding portion, an operation button portion that can be pressed, an engaging portion that engages with the holding portion of the fixing member, and the A button member formed with a support arm that connects the operation button portion and the engaging portion; and a receiving member fixed to the fixing member while holding the button member between the fixing member. One of the support arm and the receiving member is provided with a convex portion that comes into contact with the other, and when the receiving member is fixed to the fixing member, the engaging portion and the convex of the support arm are fixed. It is fixed to the said fixing member in the state which elastically deformed the part between parts.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to prevent the rattling at the time of pressing operation of the operation button part of a press type switch apparatus, the improvement of a design freedom can be aimed at, keeping manufacturing cost low.

It is a disassembled perspective view of the press type switch apparatus attached to the digital camera which is an example of embodiment of the electronic device of this invention. FIG. 2 is an exploded perspective view of the pressing switch device when FIG. 1 is viewed from the back side. It is a perspective view of a press button member. It is the perspective view which looked at the press button member shown in FIG. 3 from the back side. It is a figure which shows the state which integrated the press button member and the receiving member in the exterior cover. It is the sectional view on the AA line of FIG.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an exploded perspective view of a push-type switch device attached to a digital camera which is an example of an embodiment of an electronic apparatus according to the present invention. FIG. 2 is an exploded perspective view of the push-type switch device when FIG. .

  As shown in FIGS. 1 and 2, the push switch device of the present embodiment is attached to an exterior cover 1 of a camera body of a digital camera. The exterior cover 1 is a resin molded product in this embodiment. Two openings 1a are formed in the exterior cover 1, and the key tops 2a of the two operation button portions 2A constituting the press button member 2 integrally formed with resin or the like are pressed into each opening 1a. It is assembled so that it can be operated. Here, the exterior cover 1 corresponds to an example of the fixing member of the present invention.

  A tact switch 3a is mounted on the flexible printed circuit board 3 so as to face the push shaft 2b of the operation button portion 2A. The flexible printed circuit board 3 is fixed to a metal receiving member 4 via a double-sided tape (not shown). When the key top 2a of the push button 2A is pressed, the tact switch 3a is pushed by the push shaft 2b, whereby a detection signal is output from the tact switch 3a to the switch signal processing circuit and predetermined signal processing is performed.

  The receiving member 4 is formed with a positioning hole 4a and a notch 4b, and the hole 4a and the notch 4b are fitted into a boss 1b and a boss 1c formed in the exterior cover 1, respectively. Further, in the vicinity of the hole 4 a and the notch 4 b of the receiving member 4, screw insertion holes 4 c are formed corresponding to the screw holes 1 e formed in the exterior cover 1, respectively.

  The receiving member 4 is positioned with respect to the outer cover 1 by fitting the hole 4 a and the notch 4 b of the receiving member 4 into the boss 1 b and the boss 1 c of the outer cover 1. In this state, the screw 5 inserted into the screw insertion hole 4 c of the receiving member 4 is screwed into the screw hole 1 e of the outer cover 1, so that the receiving member 4 holds the pressing button member 2 between the outer cover 1. It is fixed to the exterior cover 1. Here, in the present embodiment, the axial direction of the screw hole 1 e is orthogonal to the fixing direction of the pressing button member 2 and is the same direction as the mold release direction after molding the exterior cover 1.

  3 is a perspective view of the push button member 2, FIG. 4 is a perspective view of the push button member 2 shown in FIG. 3 as viewed from the back side, and FIG. 5 is a state in which the push button member 2 and the receiving member 4 are incorporated in the exterior cover 1. FIG.

  As shown in FIGS. 3 and 4, in the push button member 2, two operation button portions 2A are connected by a support arm 2g, and an engaging portion 2c is provided at the center of the support arm 2g. . In the present embodiment, the support arm 2g is extended in a plurality of directions (three directions in the present embodiment) with the engaging portion 2c as a base point, and two support arms 2g extended in two directions are provided. It is connected to the push button 2A.

  The engaging part 2c has a cylindrical part 2f and an engaging shaft part 2e that protrudes from the central part of the cylindrical part 2f. As shown in FIG. 5, the engaging portion 2c engages with the holding portion 1d formed on the exterior cover 1 in a state where the engaging shaft portion 2e is sandwiched in the radial direction, so that the cylindrical portion 2f Is held in contact with the key top 2a in the direction opposite to the pressing operation direction.

  As shown in FIG. 4, the support arm 2g extending in three directions from the engaging portion 2c is provided with a hemispherical convex portion 2d that abuts on the receiving member 4 via the flexible printed circuit board 3, respectively. . In addition, the length between the convex portion 2d and the engaging portion 2c provided on the support arm 2g extending in three directions from the engaging portion 2c is the same length.

  Here, in the two support arms 2g connected to the operation button part 2A, the length from the convex part 2d to the operation button part 2A is longer than the length from the engaging part 2c to the convex part 2d. Thus, when the key top 2a of the operation button portion 2A is pressed, the support arm 2g is sufficiently elastically deformed.

  6 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 6, in the state where the press button member 2 and the receiving member 4 are incorporated in the exterior cover 1, as described above, the cylindrical portion 2 f of the engaging portion 2 c is in the holding portion of the exterior cover 1 relative to 1 d. The key top 2a of the operation button portion 2A is in contact with the direction opposite to the pressing operation direction. Further, the convex portion 2d is in contact with the flexible printed circuit board 3 on the receiving member 4 in the same direction as the pressing operation direction of the key top 2a of the operation button portion 2A.

  At this time, in the support arm 2g extending in three directions from the engaging portion 2c, the portion between the engaging portion 2c and the convex portion 2d is in a direction opposite to the pressing operation direction of the key top 2a of the operation button portion 2A. Curved and elastically deformed.

  For this reason, the dimensional error in the press button member 2 that is a resin molded product, the dimensional error in the mounting position of the receiving member 4 with which the convex portion 2d abuts via the flexible printed circuit board 3, and the like are as follows. The portion between the convex portion 2d is absorbed by elastic deformation. Therefore, the convex part 2d is not separated from the flexible printed circuit board 3, and the contact state between the three convex parts 2d and the flexible printed circuit board 3 can be reliably maintained.

  In addition, when the portion between the engaging portion 2c and the convex portion 2d of the support arm 2g is elastically deformed, the repulsive force presses the cylindrical portion 2f of the engaging portion 2c against the contact surface of the holding portion 1d, and The convex portion 2d is urged in a direction to press against the contact surface of the flexible printed circuit board 3.

  For this reason, even if the support arm 2g between the convex portion 2d and the operation button portion 2A is elastically deformed by pressing the key top 2a of the operation button portion 2A, the movement is not transmitted to the engagement portion 2c. It has become. As a result, even if one of the key tops 2a of the two operation button parts 2A is pressed, the engaging part 2c and the other key top 2a are not supported by the support arm 2g between the convex part 2d and the operation button part 2A. It does not move in conjunction with movement.

  Further, as described above, the distance between the protrusion 2d and the engagement portion 2c provided on the support arm 2g extending in the three directions from the engagement portion 2c is the same. For this reason, the cylindrical part 2f of the engaging part 2c is uniformly pressed against the holding part 1d so that the engaging part 2c does not tilt.

  As described above, in this embodiment, the contact state between the convex portion 2d provided on the support arm 2g of the press button member 2 and the flexible printed circuit board 3 can be reliably maintained, so that the key top 2a is pressed. Shaking during operation can be prevented.

  Further, in the present embodiment, the receiving member 4 is fixed to the outer cover 1 with the screw 5 in a state where the pressing button member 2 is held between the receiving member 4 and the outer cover 1. For this reason, even if the fixing direction of the press button member 2 and the mold release direction after molding the outer cover 1 are not the same, it is not necessary to provide a slide mold in the molding die of the outer cover 1. Thereby, the mold structure of the molding die of the exterior cover 1 can be simplified, and the degree of design freedom can be improved while suppressing the manufacturing cost of the pressing switch device.

  The configuration of the present invention is not limited to that exemplified in the above embodiment, and the material, shape, dimensions, form, number, arrangement location, and the like can be changed as appropriate without departing from the scope of the present invention. It is.

  For example, in the above-described embodiment, the case where the convex portion 2d is provided on the support arm 2g and brought into contact with the receiving member 4 is illustrated. You may make it contact.

DESCRIPTION OF SYMBOLS 1 Exterior cover 1d Holding part 2 Press button member 2A Operation button part 2a Key top 2c Engagement part 2d Convex part 2g Support arm 3 Flexible printed circuit board 4 Receiving member

Claims (6)

A fixing member having a holding portion;
A button member formed with an operation button portion that can be pressed, an engagement portion that engages with the holding portion of the fixing member, and a support arm that connects the operation button portion and the engagement portion;
A receiving member fixed to the fixing member in a state where the button member is held between the fixing member, and
One of the support arm and the receiving member is provided with a convex portion that contacts the other,
When the receiving member is fixed to the fixing member, the receiving member is fixed to the fixing member in a state in which a portion between the engaging portion and the convex portion of the support arm is elastically deformed. A pressing switch device.   The press switch device according to claim 1, wherein the support arm has a length from the convex portion to the operation button portion that is longer than a length from the engaging portion to the convex portion. The support arm extends from the engagement portion in a plurality of directions,
The pressing switch device according to claim 1 or 2, wherein the convex portion is arranged at a position where the distance from the engaging portion is the same with respect to the plurality of support arms.   The press switch according to any one of claims 1 to 3, wherein the engaging portion includes an engaging shaft portion that engages with the holding portion in a state of being sandwiched in a radial direction. apparatus.   The pressing switch device according to any one of claims 1 to 4, wherein the fixing member is an exterior cover of an electronic device. An electronic device comprising a pressing switch device,
An electronic apparatus comprising the push switch device according to claim 5 as the push switch device.

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