JP2005064177A - Substrate identifying method and illumination type pushbutton switch using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To identify a substrate which is difficult to be identified from an appearance without much facility cost. <P>SOLUTION: Identification elements 32 are mounted on a plurality of lands 31 irrespective of a circuit pattern formed on the substrate 3 in a prescribed arrangement that is set in accordance with a type of the substrate 3. A type of the substrate 3 is identified/judged based on presence or absence of mounting of the identification elements 32 on the land 31 and mounting arrangement. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a board identification method for identifying the type of a circuit board and an illuminated pushbutton switch using the same.

  Illuminated pushbutton switches are configured such that when a button is pressed, the button portion is illuminated from the inside.For example, including a pushbutton switch for instructing movement direction assembled to the wall surface of an elevator hall, It is often used for operation switches and stop switches of various mechanical devices and equipment.

In an illuminated pushbutton switch for an elevator, a chip LED as a light source for illumination is mounted on a substrate and is housed in a switch case (see, for example, Patent Document 1).
JP 2001-93376 A

  In general, chip LEDs are classified into characteristic ranks according to light intensity and color tone, and a board on which chip LEDs having a characteristic rank that performs illumination according to a user's request is mounted.

  In this case, the chip LED having the characteristic rank according to the user's request is mounted on the board together with other electronic components, and then the process proceeds to a subsequent process such as a process of attaching the connector to the board. It is impossible to identify which characteristic rank of the chip LED is mounted from the appearance, and the board after mounting the LED is mounted with another characteristic rank in the process. Once mixed into a used substrate, it could not be identified.

  Of course, depending on the characteristic rank of the mounted chip LED, it may be possible to identify the difference in the characteristic rank of the mounted chip LED by attaching a mark corresponding to the substrate. According to the above, a special marking device and a marking process are required, which not only increases the equipment cost but also increases the number of processes.

  The present invention has been made paying attention to such a situation, and is a method that enables identification of a board that is difficult to identify from the outside without incurring equipment costs, and is configured to be identifiable It is an object of the present invention to provide an illuminated pushbutton switch that uses a printed board to facilitate quality control.

  A substrate identification method according to the present invention is a method for identifying a type of a substrate on which an electronic component is mounted, and according to the type, an identification element is mounted in an identification area of the substrate, and the identification The type of the substrate is identified based on the mounting state of the identification element in the region.

  Here, the electronic component refers to an active component such as a transistor, a diode, or an IC, or a passive component such as a resistor, a coil, or a capacitor.

  Moreover, the kind of board | substrate means the group of the board | substrate classified according to a common property. There are various common properties. For example, it is classified according to the characteristic rank of the electronic component mounted on the board, or whether the solder used for mounting the electronic component is lead-free solder. It is possible to classify.

  The mounting state refers to the state of mounting of the identification element in the identification region. Say.

  According to the present invention, by mounting the identification element in the identification region in a mounting state corresponding to the type of the substrate, it is possible to identify the type of the substrate by visual observation or analysis of a captured image thereafter.

  In one embodiment of the present invention, the identification region includes a plurality of lands electrically separated from a circuit pattern on which the electronic component is mounted, and the mounting state is the identification area in the land. The presence and arrangement of elements.

  According to this embodiment, it is possible to mount the identification element in a number of mounting states depending on whether or not the identification element is mounted on a plurality of lands provided separately from the original circuit pattern and the combination of the mounting arrangement. By mounting the identification element in a mounting state set in advance corresponding to the type of the substrate, it is possible to identify the type of the substrate by visual observation or analysis of a captured image thereafter.

  In another embodiment of the present invention, the type corresponds to a characteristic rank of an electronic component mounted on the substrate, and the identification element is a short-circuit resistance chip.

  According to this embodiment, the mounting state of the short-circuit resistance chip is visually recognized or recognized from the presence or absence of electrical continuity, and a plurality of types of boards mounted with electronic parts having different characteristic ranks are identified. Can do.

  The illuminated pushbutton switch of the present invention is an illuminated pushbutton switch including a substrate on which a chip LED as a light source is mounted, and an identification element is provided in the identification area of the substrate according to the type of the substrate. It is mounted in the mounted state.

  According to the present invention, the identification element is mounted in the identification region in a mounting state corresponding to the type of the substrate, and then is mounted in the case of the illuminated push button switch by visual observation or analysis of the photographed image. The type of substrate can be identified.

  In one embodiment of the present invention, the identification region has a plurality of lands electrically separated from a circuit pattern on which an electronic component is mounted, and the mounted state is the identification element in the land. The presence or absence and the arrangement thereof.

  According to this embodiment, it is possible to mount the identification elements in a number of ways depending on the combination of the presence or absence of the identification elements on the land and the mounting arrangement, and the predetermined elements set in advance corresponding to the types of the boards By mounting so as to be in the mounting state, it is possible to identify the type of the board by visual inspection or analysis of a captured image thereafter.

  In a preferred embodiment of the present invention, the type corresponds to a characteristic rank of the chip LED, and the identification element is a short-circuit resistance chip.

  According to this embodiment, the mounting state of the short-circuit resistance chip is visually recognized or recognized from the presence or absence of electrical continuity, and a plurality of types of chip LEDs having different characteristic ranks such as luminous intensity and color tone are mounted. The substrate can be identified.

  In another embodiment of the present invention, the substrate is connected to the land in the identification region via a conductor pattern, and the test land is contacted with a test pin for identifying the mounting state. Is formed.

  According to this embodiment, the test pins are brought into contact with the test lands provided on the substrate, and the presence or absence of the continuity or the electrical difference such as the degree of continuity is detected. The board type can be identified by discriminating the mounting state such as the mounting array.

  According to the substrate identification method according to the present invention, it is possible to easily identify a plurality of types of substrates from the mounting state of the identification element.

  Moreover, in the present invention, the identification element can be simultaneously mounted in the electronic component mounting process on the substrate, and the process can be performed without incurring equipment costs, such as means for identifying the difference in type by attaching the mark. It can be implemented without increasing the number, and has a great practical advantage.

  In addition, according to the illuminated pushbutton switch of the present invention, it is possible to easily identify a plurality of types of substrates on which chip LEDs having different characteristic ranks are mounted, and the quality control of the substrates is facilitated.

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

  FIG. 1 is an external perspective view of an illuminated pushbutton switch according to the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a sectional view thereof.

  This illuminated pushbutton switch is preferably used as an elevator movement direction indicating switch by being attached to a wall surface of an elevator hall, and includes a base member 1 formed into a shallow box shape and an opening covered by the base member 1. A cover 2 with a 2a, a substrate 3 assembled in the center of the base member 1, a switch body 4 attached to the lower surface of the substrate 3, an operation plunger 5 assembled in the opening 2a of the cover 2 slidably up and down from the inside, The push button 6 is provided at the upper end of the plunger 5 and is provided in the operation hole 2 a of the cover 2.

  The cover 2 is provided with U-shaped locking claws 2b at both the left and right ends, and the locking claws 2b are inserted into the connecting recesses 1a formed at the left and right ends of the base member 1 and locked. Thus, the cover 2 is fixed to the base member 1, and the connection can be released by inserting a tool such as a screwdriver from the slit 1b formed in the bottom of the connection recess 1a and reversing the locking claw 2b. It is like that.

  As shown in FIG. 4, a chip-type electronic component 9 constituting a required circuit is mounted on the upper surface of the substrate 3, and a plurality of illumination light sources (in this example, 9) are lit and displayed. Chip LEDs 7 are arranged and distributed, and a signal input / output connector 8 is attached to the end of the substrate 3 as shown in FIG. The connector for external wiring can be connected via 1c.

  The operation plunger 5 is provided with a light guide hole 5b that spreads upward, and the push button 6 that is disposed so as to close the upper end of the light guide hole 5b is formed of a translucent resin material, and on the upper surface thereof. Is fitted with a pressing operation plate 10 made of a translucent resin material. In addition, operation protrusions 5 a are provided projecting downward at the four corners of the operation plunger 5.

  As shown in FIG. 5, four operation pieces 11 for operating the switch are arranged on the bottom surface of the base member 1. The operation pieces 11 are diagonally arranged from the center of the base member 1 toward the four corners, and the outer end portions of the operation pieces 11 are arranged as operation ends x so as to face the operation projections 5a of the operation plunger 5. In addition, the inner end portions of the operation pieces 11 are abutted with each other as the operation ends y. That is, the operation end x of each operation piece 11 is radially arranged so as to extend from the center of the base member 1 to the outer four sides.

  As shown in FIG. 6, the four operation pieces 11 are connected and integrated with each other by a small connecting arm 12 at an intermediate portion in the longitudinal direction, and a support portion 13 formed in the middle of the connecting arm 12. However, the entire operation piece 11 group is supported along the bottom surface of the base member 1 by being inserted into and supported by a pair of support pins 14 protruding from the bottom surface of the base member 1. Further, the bottom surface of the base member 1 is formed with a recess 15 facing the operation end x from the arm connection portion of each operation piece 11 and a groove 16 extending below the connection arm 12, as shown in FIG. When the operation end x of the operation piece 11 is pressed downward and enters the recess 15, the operation piece 11 swings like a balance around the edge e of the groove 16, and the inner operation end y is displaced upward. It is configured to In addition, the reinforcing rib 11a is bulged and formed in a length range including the swing fulcrum portion of each operation piece 11, and it is considered that the operation piece 11 swings properly without being deformed.

  Further, as shown in FIGS. 3 and 5, a horizontally long return spring plate 18 extending from the vicinity of the base peripheral wall to the center is disposed inside the base member 1. The return spring plate 18 has a wide outer end 18d engaged between a positioning projection 19 provided upright from the inner surface of the peripheral wall and the bottom surface of the base, and is locked so as not to move left and right. The end side is pressed by a pin 20 that is installed and fixed between a pair of positioning projections 19, and the position where the pin 20 is pressed is a fulcrum p shown in FIGS. It is supported so that it can be displaced. As shown in FIG. 5, the free end side of the return spring plate 18 is disposed over the butted portion of the operation piece 11 group, and any one of the operation pieces 11 is swung on the balance. When the operating end x is displaced upward, the free end side of the return spring plate 18 is pushed up and displaced. The return spring plate 18 is also formed with a reinforcing rib 18a.

  Therefore, as shown in FIG. 9B, when the end of the push button 6 is pushed and the operation plunger 5 is pushed, only the operation piece 11 on the pushed side is swung and returned. While the spring plate 18 is elastically deformed, its free end side is pushed up and displaced by the operating end y of the operation piece 11, and as shown in FIG. 9C, the central portion of the push button 6 is pushed and the operation plunger 5 is pushed. Are pushed in parallel, all the operating pieces 11 are operated to swing the balance, and the free end side of the return spring plate 18 is pushed up and displaced. When the pushing operation to the push button 6 is released, the free end side of the return spring plate 18 is lowered by the elastic restoring force, so that the operating end y of the operating piece 11 is pushed down and the operating end x of the operating piece 11 is pressed. Is pushed up, and the operating plunger 5 returns to the upper limit.

  Further, as shown in FIG. 10, the switch body 4 is configured as a leaf switch in which a fixed electrode piece 21 and a movable electrode piece 22 facing the fixed electrode piece 21 from below are supported by an insulator 23 in a cantilevered manner. The movable electrode piece 22 is further extended and disposed on the free end portion 18b of the return spring plate 18 in an overlapping manner. Therefore, when the return spring plate 18 is pushed up by the balance swinging operation of the operation piece 11, the movable electrode piece 22 is formed at the free end portion 18b of the return spring plate 18 as shown in FIGS. Is pushed and deformed, and the contact 22a of the movable electrode piece 22 is pressed against the contact 21a of the fixed electrode piece 21 to bring about a switch-on state. As a result, the LED 7 is turned on and the switch output is taken out. is there.

  Further, a snap action mechanism 25 is linked to the free end side of the return spring plate 18 in order to obtain a click feeling. As shown in FIGS. 7 and 8, the snap action mechanism 25 is engaged with support portions 27 projecting from the base member 1 at both ends 26a of a wire 26 made of a spring wire bent into a crank shape. The position is fixed, and the center eccentric part 26b of the wire 26 is configured to be locked by a wire support part 18c formed by cutting and bending the return spring plate 18. The center eccentric part 26b of the wire 26 has both end parts 26a. Can be rotated about a rotation center r.

  According to this configuration, as shown in FIG. 10A, in the switch-off state in which the return spring plate 18 is in the return position, the central eccentric portion 26b of the wire 26 is below the rotation center r of the wire 26. Then, when the operating plunger 5 is pushed down from this state and the free end side of the return spring plate 18 is displaced upward as described above, the central eccentric portion 26b of the wire 26 is lifted. As shown, the wire support 18c of the return spring plate 18 is displaced along a substantially linear locus s, whereas the locus t of the central eccentric part 26b of the wire 26 is arcuate, and the wire support As the shaft 18b is lifted, the central eccentric portion 26b of the wire 26 is elastically deformed toward the rotation fulcrum r, and the elastic restoring force of the wire 26 presses the wire support portion 18c toward the base side of the return spring plate 18. .

  In this case, while the central eccentric portion 26b is below the imaginary line L connecting the fulcrum p of the return spring plate 18 and the rotation fulcrum r of the wire 26, the downward component of the elastic restoring force of the wire 26 is maintained. As a result, the wire support portion 18c is biased downward, and the elastic restoring force of the wire 26 becomes resistance against the upward displacement of the return spring plate 18, that is, operation resistance for pushing the operation plunger 5. As soon as the center eccentric portion 26b exceeds the imaginary line L connecting the fulcrum p of the return spring plate 18 and the rotation fulcrum r of the wire 26, the elastic restoring force of the wire 26 is applied to the wire support portion 18c. Is generated, and the elastic restoring force of the wire 26 is switched to the urging force that promotes the upward displacement of the return spring plate 18.

  The chip LED 7 as the illumination light source mounted on the substrate 3 mounted on the illuminated pushbutton switch having the above-described configuration is ranked into characteristic ranks, for example, characteristic ranks A, B, C... Further, the color tone is classified into characteristic ranks A, B, C,... For example, when the luminous intensity is 3 ranks and the color tone is 3 ranks, nine types of characteristic ranks are set according to the combinations, and the user's request Accordingly, a product incorporating the substrate 3 on which the chip LED of the characteristic rank that performs illumination according to the above is mounted is provided.

  In this case, a common substrate is used, and electronic components to be mounted to configure the circuit are also common, so that it is difficult to easily identify the characteristic rank of the mounted chip LED 7 in appearance. In the present invention, the type of the board 3 after component mounting can be easily identified by the following method.

As shown in FIG. 4, four pairs of lands 31 that are electrically separated from the circuit pattern formed by the electronic component 9 and the chip LED 7 are formed on the component mounting surface of the substrate 3. In addition, the short-circuit resistor chips 32 are mounted in a predetermined arrangement as identification elements. According to this, it is possible to mount the short-circuit resistance chip 32 in 16 (= 2 ⁴ ) mounting states depending on the combination of the presence / absence of mounting of the short-circuit resistance chip 32 and the mounting arrangement. By mounting the short-circuit resistance chip 32 in a pre-defined arrangement corresponding to the characteristic rank of the mounted chip LED 7, a chip of any characteristic rank can be obtained by visual analysis or analysis of an image taken with a CCD camera thereafter. Whether the board 7 is mounted with the LED 7 can be easily identified.

  As another embodiment of the present invention, as shown in FIG. 11, test lands 33 connected to the lands 31 via conductor patterns are formed on the substrate surface, and test pins are used for these tests. The characteristic rank of the mounted chip LED 7 can be identified by contacting the land 33 and detecting the presence or absence of short-circuit conduction in each land 31.

  In the above-described embodiment, the short-circuit resistance chip is used as the identification element. However, as another embodiment of the present invention, another chip may be used, or a plurality of types of chips may be used in combination. Also good.

  As described above, it can be used for identification of a plurality of types of substrates that are difficult to identify on the appearance, and is not limited to the characteristic rank of the chip LED, for example, a substrate corresponding to lead-free and a substrate that is not so It can also be used for identification, identification of a plurality of versions of a substrate group having different characteristics on an electronic circuit, and the like.

It is a perspective view which shows the whole illumination type pushbutton switch. It is a disassembled perspective view of an illumination type pushbutton switch. It is a longitudinal cross-sectional view of an illumination type pushbutton switch. It is a perspective view of a board | substrate. It is a top view of the principal part. It is a perspective view of an operation piece. It is a perspective view which shows a return spring board and a snap action mechanism. It is principal part sectional drawing for demonstrating the action | operation of a snap action mechanism. It is a schematic sectional drawing explaining the action | operation of a return spring board. It is sectional drawing of the principal part for demonstrating switch operation. It is a perspective view which shows the board | substrate of another Example.

Explanation of symbols

3 Substrate 7 Chip LED
31 Land 32 Identification element (short-circuit resistance chip)
33 Test Land

Claims (7)

A method for identifying the type of board on which an electronic component is mounted,
According to the type, the identification element is mounted on the identification area of the board, and the type of the board is identified based on the mounting state of the identification element in the identification area. Method.   The identification region has a plurality of lands electrically separated from a circuit pattern on which the electronic component is mounted, and the mounting state is the presence / absence of the identification elements in the land and the arrangement thereof. Item 2. A substrate identification method according to Item 1.   The substrate identification method according to claim 1, wherein the type corresponds to a characteristic rank of an electronic component mounted on the substrate, and the identification element is a short-circuit resistance chip. An illuminated pushbutton switch including a substrate on which a chip LED as a light source is mounted,
An illuminated pushbutton switch, wherein an identification element is mounted in an identification area of the substrate in a mounting state corresponding to the type of the substrate.   The identification region has a plurality of lands that are electrically separated from a circuit pattern on which an electronic component is mounted, and the mounting state is the presence / absence of the identification elements in the land and the arrangement thereof. 4. Illuminated pushbutton switch according to 4.   The illuminated pushbutton switch according to claim 4 or 5, wherein the type corresponds to a characteristic rank of the chip LED, and the identification element is a short-circuit resistance chip.   7. A test land is formed on the substrate, the test land being connected to the land in the identification region via a conductor pattern and contacting a test pin for identifying the mounting state. Illuminated pushbutton switch according to any of the above.

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