JP4311147B2 - Switch operating mechanism - Google Patents

Description

  The present invention relates to a switch operating mechanism which is used in an input operation unit of various electronic devices and has a structure for switching the state of a switch arranged in the device by pressing a push button of the device. is there.

  Many types of electronic devices are provided with an input operation unit, and a push button type is preferably used as an input form to the input operation unit.

  This push button type input operation unit is generally composed of a push button that is movably held in a device casing, and a self-returning type push switch that is disposed at a rear position of the push button.

  A conventional switch operating mechanism configured as described above will be described with reference to FIGS.

  FIG. 5 is a top view of a conventional switch operating mechanism, and FIG. 6 is a partial cross-sectional side view. In FIG. 5, 1 is a wiring board of the device (hereinafter referred to as board 1), and its end A self-returning push switch 3 (hereinafter referred to as a switch 3) is mounted and mounted with the operation unit 2 facing toward the side.

  This switch 3 is of a type that is operated by pushing the operating portion 2 horizontally into the surface of the substrate 1, and the connection terminal 5 led out from the case 4 is soldered to a wiring portion (not shown) of the substrate 1. It is fixed.

  As described above, various electronic components mounted on the substrate 1 are mainly surface-mounted as the equipment becomes smaller and lighter, and the switch 3 also has the connection terminal 5 extending horizontally on the surface of the substrate 1. It is a surface mount type that has been released.

  In FIG. 5, the soldered portion of the connection terminal 5 is indicated by a hatched portion.

  The case 4 is covered with a cover 6, and a contact portion (not shown) is accommodated in an internal space of the case 4 constituted by the case 4 and the cover 6.

  In the switch 3 configured as described above, when the operation unit 2 arranged in a projecting state from the case 4 is pushed backward, a drive unit (not shown) integrated with the operation unit 2 is provided in the case 4. It is configured so that the state of the contact portion can be switched.

  A push button 10 that can be moved back and forth in a device housing or the like is disposed in accordance with the position of the operation unit 2 of the switch 3, and the rear surface of the push button 10 is in contact with the front end surface of the operation unit 2 of the switch 3. It touches.

  The conventional switch operating mechanism is configured as described above. As shown by the arrows in the figure, when the push button 10 is pushed backward, the push button 10 moves backward and is horizontal with respect to the surface of the substrate 1. As a result, the operation force toward the rear side is applied to the operation unit 2 and the operation unit 2 is pushed in, so that the contact portion of the switch 3 is switched to the ON state.

  When the operation force is removed, the contact portion of the switch 3 is self-reset to the OFF state, and the operation force 2 of the switch 3 is pushed back to the front side by the return force, and the push button 10 is pushed in accordingly. It was pushed back by the operation part 2 to the previous position.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
Japanese Utility Model Publication No. 5-126

  Since the conventional switch operating mechanism has a simple configuration and good operability, it is often used in places where the operation frequency is high. In particular, a surface mount type switch 3 is used as the switch 3. In the case of configuration, it is necessary to keep the switch 3 firmly fixed to the substrate 1 on the assumption that repeated pushing operations are performed, and management of the soldered and fixed state of the connection terminals 5 is important. .

  However, it is considered that an excessive operating force is applied to the push button 10 by dropping the device itself in the device provided with the operation mechanism, and when the excessive operating force is applied, In some cases, the soldering and fixing part was affected.

  The present invention solves such a conventional problem, and includes an unexpected case, and the influence of an excessive operating force on a soldering fixing portion of a surface mount type push switch mounted on a wiring board. An object of the present invention is to provide a switch operating mechanism that can reduce the above.

  In order to achieve the above object, the present invention has the following configuration.

According to the first aspect of the present invention, a surface mount type switch that is operated by pressing the operation unit in a direction parallel to the board surface to be mounted is mounted on the wiring board, and the operation unit of the switch Is an operation mechanism of a switch that presses the back side with a push button that moves back and forth in a direction parallel to the board surface , wherein the switch has an end of a notch provided on the wiring board. The push button has a pressing part for pressing the operation part of the switch behind the front wide part, and the lower area part of the pressing part is for moving distance regulation. When the push button is pushed backward, the switch is switched to the activated state, and then the end surface portion is brought into contact with the front end surface of the notch so that the push button is in the stopped state. Both In the stopped state, the intermediate step end surface formed between the front wide portion and the pressing portion of the push button has a predetermined interval with respect to the front end surface of the wiring board corresponding to the lateral position of the notch. The switch operating mechanism is characterized by being configured to stop at a close position, and the push button moves only a set distance to the rear side , and in the pushed state, it moves in the left-right direction. The tilting of the switch can also be regulated, so that it is difficult to apply excessive operating force to the surface mount type push switch soldered and fixed on the wiring board, including in the case of inadvertent cases, and the effect on the soldered fixed part It has the effect | action that what can reduce can be obtained.

According to a second aspect of the present invention, in the first aspect of the present invention, in the state where the end surface portion of the push button is in contact with the end surface of the wiring board, the receiving portion provided below the end surface portion is the wiring It is located on the lower surface side of the board, and when the operating force to the push button is applied obliquely upward, the receiving part is restricted from moving on the lower surface of the wiring board, so it is also attached to the soldering fixed part of the push switch , It has an effect that it is difficult to apply an excessive force upward.

According to a third aspect of the present invention, in the first aspect of the present invention, the contact position between the end surface of the push button and the end surface of the wiring board is set at a position lower than the center position of the push button in the thickness direction. Since the push button comes into contact with the end surface of the board and then tilts slightly toward the side where the switch is pressed against the board with the contact part as the center line, the solder mounting of the surface mount type switch is fixed. This has the effect of not applying an upward peeling force to the part.

  As described above, according to the present invention, it is difficult to apply excessive operating force to the surface mount type push switch soldered and fixed on the wiring board, and the switch operating mechanism that can reduce the influence on the soldering fixed portion is provided. An advantageous effect that it can be realized is obtained.

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

  In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of the prior art, and detailed description is abbreviate | omitted.

(Embodiment)
FIG. 1 is a partial cross-sectional side view of a switch operating mechanism according to an embodiment of the present invention, FIG. 2 is a top view thereof, and in FIG. 1, reference numeral 21 denotes a wiring of a device provided with a notch 21A at an end. A surface mount type push switch 3 (hereinafter referred to as switch 3) described in the section of the prior art is soldered and fixed on the substrate 21 (hereinafter referred to as substrate 21). Has been.

  As an arrangement state of the switch 3, the operation terminal 2 is aligned with the position of the notch 21 </ b> A so that the operation part 2 projects forward from the end of the notch 21 </ b> A of the board 21. A part (not shown) is mounted by soldering.

  In addition, the said board | substrate 21 is comprised by the thing of the predetermined thickness which used the glass epoxy and phenol with rigidity as the base material, and although abbreviate | omitting illustration, it is firmly positioned and fixed to the housing | casing etc.

  In FIG. 2, the soldered portion of the connection terminal 5 of the switch 3 is indicated by a hatched portion.

  Reference numeral 31 denotes a push button of a device having a “convex” shape in a top view provided with a pressing portion 33 that protrudes rearward from the center position of the front wide portion 32. The movement is restricted by the casing of the device only in the front-rear direction corresponding to the left-right direction in the figure, which is horizontal to the 21st surface.

  The rear end surface 33A of the pressing portion 33 of the push button 31 is in contact with the front end surface of the operation unit 2 of the switch 3.

  Further, when the push button 31 is not operated, the lower region portion of the rear end surface 33A of the pressing portion 33 is disposed so as to face the front end surface of the cutout 21A of the substrate 21, as shown in FIG.

  The opposing distance between them is set to be equal to the operation stroke of the switch 3 or a distance obtained by adding some dimensions.

  Furthermore, a receiving portion 34 is provided at a position below the pressing portion 33 of the push button 31 so as to protrude rearwardly on the surface of the substrate 21 from the rear end surface 33A.

  Further, the intermediate step portion end surface 35A between the front wide portion 32 and the pressing portion 33 is equal to the distance between the pressing portion 33 and the substrate 21 or a distance obtained by adding some dimensions in the non-operation state of the push button 31. , Located opposite to the front end face of the substrate 21.

  The switch operating mechanism according to the present embodiment is configured as described above.

  Next, the operation will be described. When the push button 31 protruding from the housing or the like is pushed in the horizontal rear side with respect to the surface of the substrate 21, the push button 31 is regulated by the housing or the like while being controlled by the housing (in the drawing). The left-hand side of the operation unit 2 is moved horizontally, and the pressing unit 33 pushes the operation unit 2 by applying a rearward operation force to the operation unit 2 in contact therewith.

  And when the operation part 2 is pushed in the set stroke distance of the said switch 3, the state of the contact part of the switch 3 will switch to an ON state.

  At the same time, the lower region portion of the rear end surface 33A of the pressing portion 33 is applied to the front end surface of the notch 21A of the substrate 21 as shown in the partial sectional side view showing the operation state of FIG. 3 and the same top view of FIG. The touch button 31 stops in the contact state.

  And even if the operation force of the further back is added to the push button 31 after both contact | abut, the push button 31 does not move back, and excessive operation force is not added to the operation part 2 of the switch 3. Therefore, the influence of the switch 3 on the soldering fixing portion can be reduced, and the soldering fixing portion can be protected.

  As shown in FIG. 3, the contact position between the front end surface of the notch 21 </ b> A of the substrate 21 and the rear end surface 33 </ b> A of the pressing portion 33 is the center of the push button 31 on the push button 31 in the thickness direction side. A configuration in which the contact state is established at a lower position is preferable.

  As long as the push button 31 has a slight rattling or the like, the push button 31 comes into contact with the front end surface of the notch 21A of the fixed substrate 21 and stops, and then the contact portion is the central portion. This is because the switch 3 is slightly tilted to the side where the switch 3 is pressed against the substrate 21, and it is possible to avoid applying a peeling force in the direction of less resistance at the soldered portion of the surface mount type switch 3, that is, upward. .

  When the push button 31 is stopped, the receiving portion 34 provided below the pressing portion 33 is located in the lower surface area of the substrate 21.

  For example, when the push button 31 is operated toward the diagonally upper side and the push button 31 moves obliquely upward, the upper surface of the receiving portion 34 comes into contact with the lower surface of the substrate 21. 31 is arranged to restrict the movement of the upper part 31 so that an excessive operating force directed upward is not applied to the switch 3.

  At this time, in order not to affect the horizontal pressing state of the push button 31, the height of the upper surface of the receiving portion 34 is set so as to be separated from the lower surface of the substrate 21 by a predetermined distance as shown in FIG. 3. It is important to set.

  Further, when the push button 31 is in a stopped state, the intermediate step end face 35A is kept at a predetermined distance from the front end face of the substrate 21, as shown in FIG.

  The intermediate step portion end surface 35A functions to protect the soldering and fixing portion of the switch 3 by contacting the front end surface of the substrate 21 when the push button 31 is tilted in the left-right direction due to rattling or the like.

  When the operation force to the push button 31 is removed, the operation part 2 of the switch 3 is pushed back by the force that the contact part of the switch 3 self-resets to the OFF state, and the push button 31 is pushed in accordingly. It is pushed back to the position before the operation through the operation unit 2.

  As described above, the switch operating mechanism according to the present embodiment is configured such that the movement distance of the push button 31 to the rear can be regulated by utilizing the end face of the rigid substrate 21 on which the switch 3 is mounted. .

  In the case of this configuration, the minimum necessary members such as a substrate 21 made of a rigid body that is firmly fixed to a normal housing, a switch 3 that is attached and fixed thereto, and a push button 31 for operating the switch 3 It is possible to configure simply, space-saving and inexpensively only by combining.

  In addition, although the push button 31 provided with the receiving part 34 was demonstrated to the above as an example, even if it eliminates the receiving part 34, position control of the push button 31 to the back is made including an unexpected case. Therefore, the soldering and fixing portion of the switch 3 can be protected.

  In addition to using the end face of the substrate 21 made of a rigid body as a stopper as in the above-described configuration, the same structure can be used to stop the pressing portion of an appropriately set push button against the housing or other constituent members. Although an effect is obtained, since the number of combination members is increased, it is preferable to consider an error at the time of combination and to have a configuration in which no upward force is applied to the switch 3.

  Further, as a place where the receiving portion 34 for restricting the upward force to the switch 3 is provided, it is possible to provide it at a position below the intermediate step portion end face 35 </ b> A in addition to the pressing portion 33 of the push button 31. .

  The switch operating mechanism according to the present invention includes an unexpected case, and it is difficult for an excessive operating force to be applied to the surface mount type push switch mounted on the wiring board, and the influence on the soldering fixing portion can be reduced. This is useful when configuring an input operation unit using a switch in various electronic devices.

1 is a partial cross-sectional side view of a switch operating mechanism according to an embodiment of the present invention; Top view Partial sectional side view showing the same operating state Top view Top view of conventional switch operating mechanism Partial sectional side view

Explanation of symbols

2 Operation part 3 Push switch 5 Connection terminal 21 Wiring board 21A Notch 31 Push button 32 Wide front part 33 Push part 33A Rear end part 34 Receiving part 35A End face of intermediate step part

Claims (3)

A surface mount type switch that is operated by pressing the operation unit in a direction parallel to the board surface to be mounted is mounted on the wiring board, and the switch operation unit is moved back and forth in a direction parallel to the board surface. An operating mechanism for a switch that pushes backward with a push button, the switch being mounted with the operating portion protruding forward from an end of a notch provided in the wiring board, The push button has a pressing portion for pressing the operation portion of the switch behind the front wide portion, and a lower region portion of the pressing portion is configured as an end surface portion for restricting the moving distance. When the switch is pushed backward, the switch is switched to the operating state, and then the end surface portion comes into contact with the front end surface of the notch to stop the push button. The intermediate step end surface formed between the front wide portion and the pressing portion is stopped at a close position with a predetermined interval with respect to the front end surface of the wiring board, which is a lateral position of the notch. A switch operating mechanism characterized by that . End surface of the push button, in a state where the end surface of the wiring board in contact with, the receiving portion provided below the end face portion of claim 1, wherein the switch of the operation mechanism located on the lower surface side of the wiring board. Contact position between the end face and the end face of the wiring board of the button push, than the central position of the push button in the thickness direction of the set according to claim 1, wherein the lower position switch operating mechanism.

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