JP4364787B2 - Switch spacer and electrical equipment - Google Patents

Description

  The present invention relates to a switch spacer of a switch provided in a cooking device such as a rice cooker and other electrical devices, and an electrical device using the switch spacer.

  In electrical equipment (for example, rice cookers) that allows the user to perform various controls by operating the switches from the outside of the equipment, a display operation in which the required number of small switches such as tact switches and light emitting elements are mounted on the electronic board. And a control unit to which various control elements such as a microcomputer are attached, and a switch spacer is provided between the operation panel and the electronic board in order to press the switch of the display operation unit from the surface of the operation panel. Intervened.

  When a large number of electronic components are mounted on a single electronic substrate in this way, it is difficult to secure an installation space in the device. Therefore, conventionally, in order to reduce the area of the electronic substrate, there are cases where a plurality of electronic substrates are connected in a facing state by a switch spacer (see Patent Document 1).

  For example, a switch spacer described in Patent Document 1 is provided with a spacer portion facing a switch on a first electronic board on a frame provided with a mounting leg that engages with a first electronic board, and a second part on the frame. The connection part with the electronic substrate is provided.

  The connecting part is formed by a connecting leg protruding in the same direction as the mounting leg, and the tip part is formed in a claw shape that penetrates the second electronic board side and engages the electronic board. Has been. When the distal end portion and the second electronic substrate are engaged, the two electronic substrates are held at a predetermined interval by the connecting legs and connected to each other so that the substrate surfaces face each other.

JP 2001-196006 A

  However, in the switch spacer as in Patent Document 1, when the electric device collides with the floor or the like with a strong momentum, the first electronic board is fixed to the device, but this and the connecting leg are hollow. The second electronic substrate held in the case may momentarily shake strongly due to the impact transmitted into the device. At this time, there is a possibility that the pawl engagement is momentarily loosened and the engagement between the connecting leg and the second electronic board is released. In such a state, the second electronic board may drop off and come into contact with the first electronic board or may come into contact with other members.

  Accordingly, an object of the present invention is to sufficiently prevent the second electronic substrate from dropping due to a drop impact when the first electronic substrate and the second electronic substrate are connected to each other with a facing distance by a switch spacer. It is an object of the present invention to provide a switch spacer and an electrical device that can be used.

  In order to solve the above problems, a frame portion attached to a first electronic substrate having a switch disposed on a substrate surface, the spacer portion facing the switch, and the first electronic substrate on the frame portion A claw leg portion extending toward the second electronic substrate facing the first electronic substrate, and the claw leg portion is claw-engaged with an engagement hole provided on the substrate surface of the second electronic substrate. In the switch spacer for connecting the first electronic substrate and the second electronic substrate with a facing distance therebetween, the switch spacer according to the present invention is provided with elastic legs extending toward the second electronic substrate, The second electronic board is sandwiched in the claw engaging direction by the leg portion and the engaged claw leg portion.

  According to the configuration of the present invention, even when the second electronic board swings in the direction of releasing the claw engagement due to an impact, the second electronic board is held by the claw engagement by the elastic leg portion and the engaged claw leg portion. Since it is sandwiched in the mating direction, disengagement is prevented.

  Here, the elastic leg portion is not limited to the one in which the second electronic substrate is sandwiched on the extension line from the engagement hole toward the claw engagement direction. According to this aspect, disengagement is most effectively prevented, but the claw leg portion and the elastic leg portion face the switch spacer on the same line. However, since the elastic leg portion and the claw leg portion sandwich the second electronic board by elastic tightening, the distance between the claw leg portion and the elastic leg portion in the claw engagement direction is the claw engagement direction before the claw engagement. Narrower than in the combined state. Therefore, in this aspect, when the claw leg portion is inserted into the engagement hole, the claw leg portion or the elastic leg portion must be bent relatively large in the claw engagement release or claw engagement direction, and the insertion is performed. hard.

  Therefore, if the configuration in which the elastic leg portion sandwiches the second electronic substrate in a state in which the elastic leg portion is displaced from the claw leg portion in the circumferential direction of the second electronic substrate, the disengagement can be prevented. While playing, it is easy to insert the claw leg portion into the engagement hole because the both leg portions do not face each other on the same straight line. Here, if the second electronic substrate is provided with a straight side portion and an engagement hole is provided on the normal line of the straight side portion, the elastic leg portion is formed in the claw leg in the circumferential direction of the second electronic substrate. Even in a state of being offset from the portion, the contact between the elastic leg portion and the second electronic substrate is stable, so that the sandwiched state can be stabilized.

  The switch spacer according to the present invention is provided in the apparatus with a mounting portion for supporting the first electronic board in a facing direction to the second electronic board, and the first electronic board is provided in the mounting section. In the electric device on which the electronic board is mounted, the second electronic board is sufficiently prevented from falling off by the elastic leg portion.

  As described above, according to the present invention, when the first electronic substrate and the second electronic substrate are connected to each other with the facing distance by the switch spacer, the second electronic substrate is dropped due to a drop impact. Therefore, it is possible to provide a switch spacer and an electric device that can sufficiently prevent the above.

  Embodiments of a switch spacer and an electric device according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an excerpt of a switch spacer portion of an electric device according to an embodiment, as viewed from the upper right diagonal. FIG. 2 shows the appearance of the electrical apparatus according to the embodiment as viewed from the front right and diagonally upward.

  As shown in FIGS. 1 and 2, the electric device 100 is configured as an electric rice cooker. On the other hand, the switch spacer 1 is provided on a display operation board 102 (first electronic board) disposed below the operation panel 101 of the electric device 100. The display operation board 102 and a control board 103 facing the display operation board 102 are provided. The second electronic substrate is connected with a facing distance.

  FIG. 3A illustrates a top view of the switch spacer 1 and illustrates a state in which the outer shape of the display operation board 102 and the control board 103 in a top view is drawn with a two-dot chain line at the same magnification. b) shows a rear view of FIG. FIG. 4 shows an enlarged view of the vicinity of the switch spacer 1 of the electric device 100 taken along the line IV-IV in FIG. FIG. 5 shows a state in which the switch spacer 1 and the display / operation board 102 are extracted and the switch spacer 1 is removed from the display / operation board 102 as viewed from the lower left and diagonally below.

  As shown in FIG. 3, each of the outer peripheral shapes of the display operation board 102 and the control board 103 is such that the rear end edges b2 and b3 are straight sides and the side end edges s2 and s3 are from both ends of the rear end edge when viewed from above. Parallel to the front side, front end edges f2 and f3 connecting both side edges are provided so as to have a substantially arcuate shape by a plurality of straight sides. The two substrates 102 and 103 are formed such that the control substrate 103 protrudes from the periphery of the display operation substrate 102 at a portion other than the rear edge when the rear end edges of the both substrates 102 and 103 overlap.

  As shown in FIG. 1, the display operation board 102 has a plurality of switches 104 including tact switches, a light emitting element 105 (see FIG. 7), and the like on the board surface on the upper surface side. These components are printed on the board surface on the lower surface side. The control board 103 is also provided with various electronic elements 106 on the board surface and printed wiring. Both substrates 102 and 103 are electrically connected by a flat cable 107.

  Further, a switch spacer 1 for transmitting the movement of the operation button unit 108 embossed on the operation panel 101 to the switch 104 is attached to the upper surface of the display operation board 102.

  As shown in FIGS. 1, 4, and 5, the switch spacer 1 has an arcuate bar-shaped frame portion 2. On the lower surface of the frame portion 2, a plurality of mounting legs 3 with locking portions and a plurality of positioning projections 4 are provided. The mounting legs 3 and the protrusions 4 are engaged with insertion holes 109 a and 109 b provided corresponding to the display / operation board 102.

  The frame portion 2 is provided with a plurality of screwing sleeves 5 and cantilevered elastic arms 6. The tip of each elastic arm 6 is a spacer portion 7. The spacer portion 7 is provided at a position facing the switch 104 of the display operation board 102. Further, a light emitting element cover 8 is provided on the frame portion 2 so as to face the light emitting elements 105 of the display operation board 102. Each spacer portion 7 approaches each switch 104, and the light emitting element 105 is inserted inside the light emitting element cover 8.

  Claw legs 9 a, 9 b, 9 c extending toward the control board 103 are provided at three locations on the frame portion 2. Each claw leg portion 9a, 9b, 9c extends below the mounting leg 3, and its lower end portion 10 has a claw shape. In addition, each claw leg portion 9a, 9b, 9c has a spacing retaining rib 11 that protrudes on the opposite side to the claw shape. The gap g between the gap holding rib 11 and the lower end portion 10 is formed to be equal to or slightly larger than the thickness of the control board 103.

  On the other hand, the control board 103 is provided with three square holes 110 for engagement corresponding to the claw leg portions 9a, 9b, 9c. The claw leg portion 9 protrudes beyond the front edge f2 of the display / operation board 102, and the lower end portion 10 of each claw leg portion 9a, 9b, 9c is claw-engaged with the corresponding square hole 110. In this state, each interval holding rib 11 lightly strikes the substrate surface of the control substrate 103 and maintains the facing interval between the display operation substrate 102 and the control substrate 103. Thereby, both the boards 102 and 103 are connected by the claw legs 9a, 9b, and 9c of the switch spacer 1.

  Further, elastic leg portions 12 a and 12 b extending toward the control substrate 103 through the front edge f 2 of the display operation substrate 102 are provided on the outer surface of the frame portion 2. Each elastic leg part 12a, 12b protrudes below the front end edge f3 of the control board 103 from the side of the claw leg part 9a, 9b along the claw leg part 9a, 9b. Thereby, each elastic leg part 12a, 12b hooks on the front-end edge f3 in the state shifted | deviated in the circumferential direction of the control board 103 with respect to each nail | claw leg part 9a, 9b of an engagement state. . The elastic legs 12a and 12b are gently curved so as to enter inward from the front edge f3 of the control board 103 in a natural state, and the claw legs 9a and 9b to the elastic legs 12a, The interval in the claw engagement direction C between 12b is set shorter than the normal length of the front end edge f3 passing through the square hole 110 in a state before the claw engagement. As a result, the elastic legs 12a and 12b exert an inward elastic tightening force in the above-described externally hooked state so that the control board 103 is sandwiched in the claw engagement direction C together with the engaged claw legs 9a and 9b. It has become.

  The switch spacer 1 is an integrally molded product made of a resin that satisfies the elasticity required for the claw leg portions 9a, 9b, 9c and the elastic leg portions 12a, 12b.

  Next, attachment of the switch spacer 1, the display operation board 102, and the control board 103 will be described. FIG. 6 shows a state in which the display operation board 102 and the control board 103 are attached as seen from the front right upper side in the assembly work of the electric device 100, and FIG. 7A shows the vicinity of the switch spacer 1 of the electric device 100. Fig. 3 (a) is cut along the line VII-VII and shown in an enlarged view, and Fig. 3 (b) is cut along the line bb in Fig. 3 (a). This is shown in a reduced scale.

  As shown in FIGS. 6 and 7, an attachment portion 112 that supports the display operation substrate 102 in the facing direction A with the control substrate 103 is provided on the inner wall surface of the shoulder portion 111 of the electric rice cooker 100. The mounting portion 112 includes a pair of opposed positioning portions 113a and 113a provided on both inner wall surfaces of the shoulder portion 111 and a pair of screwing bosses 114 and 114 provided on the back side of the attached portion of the operation panel 101. It consists of. Further, positioning portions 113b and 113b similar to the positioning portions 113a and 113a are provided below the positioning portions 113a and 113a so as to correspond to the facing distance between the display operation board 102 and the control board 103 in the facing direction A. Yes.

  The display operation board 102 is attached to the mounting portion 112 as follows. First, the switch spacer 1 is attached to the display operation board 102 by engaging the mounting legs 3 and the protrusions 4 with the insertion holes 109 a and 109 b of the display operation board 102. Next, with the switch spacer 1 side facing the operation panel 101 side, the side edge s2 of the display operation board 102 is passed through the tapered surfaces of the positioning portions 113a and 113a. Next, when the screwing bosses 114 and 114 are brought into contact with one end of the screwing sleeve 5 of the switch spacer 1 and the screws 115 inserted from the lower surface side of the display operation board 102 are screwed into the screwing bosses 114, The operation board 102 is attached to the attachment portion 112. In this state, it passes through the required holes 116 provided in each of the spacer portions 7 and the shoulder portion 111 and contacts the lower surface of the operation button portion 108 of the operation panel 101. Further, the light emitting element cover 8 faces below the other hole 116.

  After the display operation board 102 is mounted, the control board 103 is passed through the positioning portions 113b and 113b in the same manner as described above while being folded back with respect to the display operation board 102 with the flat cable 107, so that the display operation board 102 faces the display operation board 102. Let Then, the elastic legs 12 a and 12 b are bent slightly outward, and the elastic legs 12 a and 12 b are hung on the front edge f 3 of the control board 103, and the lower ends 10 of the claw legs 9 a, 9 b and 9 c are It is inserted into the hole 110 and engaged with the control board 103 (see FIG. 1). As a result, the distance holding unit 11 hits the control board 103, and the display operation board 102 and the control board 103 are connected to each other by the switch spacer 1 so as to maintain a face-to-face distance, and are arranged below the operation panel 101. Become.

  Thereafter, as shown in FIG. 1, lead wires 119 and the like toward the lid 118 are connected to the respective terminals 117 of the control board 103 (see FIGS. 8A to 8C). The lead wire 119 is guided to the shoulder hinge portion 120 through the internal space of the device, and is passed through the lead hook portion 122 of the shoulder hinge portion 120 formed above the hinge pin 121. The lead hooking portion 122 is provided in a hook shape, and the lead wire 119 reaches the inside of the lid 118 in a state of being bundled by the hooking portion 122. This prevents the lead wire 119 from being caught by the hinge spring 123 above the hinge pin 121 when the lid 118 is opened and closed.

1 is an overall perspective view of a switch spacer according to an embodiment. The whole perspective view of the electric equipment concerning an embodiment. (A) Top view of switch spacer same as the above, (b) Rear view of FIG. FIG. 4 is a partially enlarged longitudinal sectional side view of a cross section obtained by cutting the vicinity of the switch spacer of FIG. 2 along the line IV-IV of FIG. The exploded perspective view of a switch spacer same as the above. The assembly drawing of the mounting stage of the display operation board | substrate of an electric equipment same as the above. 2A is a partially enlarged longitudinal side view of a cross section obtained by cutting the vicinity of the switch spacer in FIG. 2 along the line VII-VII in FIG. 3A, and FIG. 2B is a cross-sectional view taken along the line bb in FIG. . (A) Rear perspective view showing the shoulder hinge part of the electrical device partly cut away, (b) (a) Enlarged top view of the lead hanging part in (a), (b) Enlarged lead hanging part in (a) figure Rear view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Switch spacer 2 Frame 3 Mounting leg 4 Protrusion 5 Screwing sleeve 6 Elastic arm 7 Spacer part 8 Light emitting element cover 9a, 9b, 9c Claw leg part 10 Lower end part 11 Space | interval holding rib 12a, 12b Elastic leg part 100 Electric equipment 101 Operation panel 102 Display operation board 103 Control board 104 Switch 105 Light emitting element 106 Electronic element 107 Flat cable 108 Operation button part 109a, 109b Insertion hole 110 Square hole 111 Shoulder part 112 Mounting part 113a, 113b Positioning part 114 Screw fixing boss 115 Screw 116 Hole 117 Terminal 118 Lid 119 Lead wire 120 Shoulder hinge part 121 Hinge pin 122 Lead hook part 123 Hinge springs b2 and b3 Rear edge s2 and s3 Side edge f2 and f3 Front edge

Claims (3)

  A frame portion attached to a first electronic substrate having a switch disposed on the substrate surface; a spacer portion facing the switch; and a second electronic substrate facing the first electronic substrate on the frame portion. And a claw leg portion extending toward the first electronic substrate and the second electronic substrate in a state where the claw leg portion is engaged with an engagement hole provided on a substrate surface of the second electronic substrate. In the switch spacer for connecting the electronic substrate with a facing distance, an elastic leg portion extending toward the second electronic substrate is provided, and the second electron is formed by the elastic leg portion and the engaging claw leg portion. A switch spacer characterized by sandwiching a substrate in a claw engaging direction.   2. The switch spacer according to claim 1, wherein the elastic leg portion sandwiches the second electronic substrate in a state of being offset from the claw leg portion in a circumferential direction of the second electronic substrate.   An attachment portion that includes the switch spacer according to claim 1 and that supports the first electronic substrate in a facing direction to the second electronic substrate is provided in the apparatus, and the attachment portion includes the first spacer. An electrical device on which one electronic board is mounted.

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