JP2006134792A - Multiple direction input device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent positively invasion of dust into the contact part of the housing and prevent troubles such as conduction failure caused by dust. <P>SOLUTION: Stems 25, 26 are housed capable of rocking operation in a housing 10 of which one end is open and which has a contact part at the bottom face, and the housing opening part is covered by a lid 34, and the opening end side of the stems 25, 26 is made to protrude from the insertion port 35 to the outside of the housing. A dustproof member 22 is arranged between the contact part and the stems 25, 26 and is made to cover over the contact part. The dustproof member 22 is held by a support member 24, but when the stems 25, 26 are incorporated into the housing 10, the stems 25, 26 are positioned so that the pressing pieces 29-32 provided at the lower end of the stems 25, 26 may be arranged at the position capable of pressing the contact part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a multidirectional input device in which a stem is housed in a housing so as to be swingable.

2. Description of the Related Art Conventionally, a multidirectional input switch that outputs a switching signal corresponding to a tilting direction by swinging a stem is known (see, for example, Patent Document 1). As shown in FIG. 7, the multi-directional input switch described in Patent Document 1 is provided with contact portions 2 and 3 on the inner bottom portion of the housing 1 having a U-shaped cross section. The 1st stem 4 and the 2nd stem 5 which press a part individually are installed. On the other hand, the lid 6 that covers the opening of the housing 1 is provided with an opening. By passing the first stem 4 through the opening, the lid 6 can be swung from the outside. Further, a guide hole penetrating in the vertical direction is formed in the center portion of the first stem, and the center push is possible from the outside by inserting the second stem into the guide hole.
Japanese Patent Laid-Open No. 10-188738

  However, in the conventional multidirectional input switch, dust may enter the housing through the stem insertion opening of the lid 6. Further, dust may enter the housing from the joint of the lid 6 and the housing 1. For this reason, there is a problem that dust entering the housing is clogged in the contact portions 2 and 3 and causes problems such as poor conduction.

  The multi-directional input device according to the present invention includes a housing having one open side and a contact portion on a bottom surface, a stem housed in the housing so as to be swingable, and disposed between the contact portion and the stem. A dust-proof member covering the upper part, a holding member for holding the dust-proof member, and a lid that covers the housing opening and projects the operation end side of the stem from the insertion port to the outside of the housing. And

  According to the multi-directional input device configured as described above, the dust-proof member that covers the contact portion in the housing is provided, so that dust may have entered the housing from the gap between the opening of the lid and the stem. However, the dust is blocked by the dust-proof member, so that the intrusion into the contact portion can be surely prevented, and problems such as poor conduction due to the dust can be prevented. Moreover, since the dust-proof member is held by the holding member, it is possible to prevent the dust-proof member from peeling off or rising.

  In the multidirectional input device according to the present invention, the holding member is arranged such that a pressing end provided at a lower end of the stem is arranged at a position where the contact portion can be pressed when the stem is assembled in the housing. It is desirable to provide a positioning function for positioning the stem.

  As described above, the holding member that holds the dust-proof member functions as a positioning member that positions the stem, so that alignment when the stem is incorporated into the housing is facilitated, and the efficiency of the assembly work can be improved.

  The multi-directional input device according to the present invention includes a housing having one open side and a contact portion on a bottom surface, a stem housed in the housing so as to be swingable, and disposed between the contact portion and the stem. A dust-proof member covering all of the housing bottom surface and the housing side wall inner surface including the upper part, a housing opening, and an operating end side of the stem projecting out of the housing from the insertion port, and the outer edge of the dust-proof member is disposed in the housing opening And a lid sandwiched between the two.

  According to the multi-directional input device configured as described above, the outer edge portion of the dustproof member is sandwiched between the lid and the housing opening, so that the dustproof member can be held without separately preparing a holding member for holding the dustproof member. Thus, it is possible to reliably prevent dust from entering the contact portion. Since the dustproof member also has a function as a holding member, the number of parts can be reduced and the efficiency of the assembly work can be further improved.

  According to the present invention, it is possible to provide a multidirectional input device that can reliably prevent dust from entering the contact portion in the housing and prevent problems such as poor conduction due to dust.

  Hereinafter, embodiments of the multidirectional input device of the present invention will be specifically described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a side sectional view showing a configuration of a multidirectional input device according to Embodiment 1, and FIG. 2 is an exploded perspective view of the multidirectional input device.

  The housing 10 has a box shape with an opening at the top, and the second, third, fourth, and fifth central fixed contacts 12, centering on the first central fixed contact 11, 13, 14, 15 are arranged radially. In FIG. 1, only the first, second and third central fixed contacts 11, 12, 13 appear. A peripheral fixed contact 16 is disposed around each central fixed contact 11, 12, 13, 14, 15. In FIG. 1, the peripheral fixed contact 16 appears partially (16a, 16b, 16c), but is composed of one continuous contact. On the first center fixed contact 11, a movable contact spring 17 bulging upward (stem side) is placed. By placing the outer peripheral edge of the movable contact spring 17 on the peripheral fixed contact 16 a disposed around the first central fixed contact 11, the movable central spring 17 is brought into a non-contact state with the first central fixed contact 11. A movable contact spring 18 bulging upward is placed on the second central fixed contact 12. A part of the outer peripheral edge of the movable contact spring 17 is placed on the peripheral fixed contact 16 b disposed around the second central fixed contact 12, and the remaining part of the outer peripheral edge is directly placed on the bottom surface of the housing 10. 2 The center fixed contact 12 is not contacted. Similarly, a movable contact spring 19 bulging upward is placed on the third central fixed contact 13, and a part of the outer peripheral edge of the movable contact spring 19 is placed on the peripheral fixed contact 16 c, The remaining portion is directly mounted on the bottom surface of the housing 10. The relationship between the fourth and fifth central fixed contacts 14 and 15 not shown in FIG. 1 and a part of the peripheral fixed contact 16 disposed around the fourth and fifth central fixed contacts 16 and 15 is the same as that of the second and third central fixed contacts 12 and 13. It has a structure. A contact portion is constituted by a combination of the fixed contacts and the movable contact springs.

  In the present embodiment, a dustproof member 22 that covers the upper surface of the contact portion provided at the center of the inner bottom surface of the housing 10 is provided. The dustproof member 22 is preferably formed of a flexible sheet so as not to hinder the operation feeling. A step portion 23 is formed in the housing 10 so as to surround the central portion of the inner bottom surface provided with the contact portion. The dust-proof member 22 is cut into substantially the same shape as the inner bottom surface of the housing 10, and the peripheral portion of the dust-proof member 22 is placed on the stepped portion 23 to cover the central portion of the inner bottom surface, that is, the entire contact portion. It is desirable to form an adhesive portion 22a on the peripheral edge portion of the dustproof member 22 placed on the step portion 23. By adhering the adhesive portion 22a of the dustproof member 22 to the stepped portion 23, peeling or lifting of the dustproof member 22 during assembly and use can be reliably prevented. In addition, the entry of fine dust can be reliably prevented, and mounting can be easily performed. Furthermore, the contact portion can be prevented from falling off even when the housing 10 is tilted.

  In the present embodiment, a holding member 24 that holds the dustproof member 22 and has a stem positioning function is provided. The holding member 24 has an annular body that has an inner diameter larger than the outermost diameter portion of the stem and has an outer shape that matches the opening shape of the housing 10. Further, the thickness of the holding member 24 is set so as not to protrude upward from the upper surface of the housing 10 in a state where it is placed on the step portion 23. The structure related to the stem positioning function and rotation prevention function of the holding member 24 will be described later. By fitting the holding member 24 into the housing 10, the outer periphery of the dust-proof member 22 is sandwiched between the step portion 23 and the contact surface of the holding member 24, and the dust-proof member 22 is fixed.

  The stem has a double stem structure including a first stem 25 for swing input and a second stem 26 for center push. A guide hole 27 is formed in the center portion of the first stem 25 in the vertical direction, and the second stem 26 is inserted through the guide hole 27. The first stem 25 is formed with a skirt portion 28 that extends downward, and the outer peripheral portion of the skirt portion 28 has four pressing pieces 29, 30, 31, 32 extending outward at approximately 90 ° intervals. have. In FIG. 1, the pressing pieces 31 and 32 do not appear. The four pressing pieces 29, 30, 31, 32 are movable contact springs placed on the second central fixed contact 12, the third central fixed contact 13, the fourth central fixed contact 14, and the fifth central fixed contact 15. 18, 19, 20, 21 are arranged on the upper surface. The lower end of the second stem 26 inserted into the first stem 25 is disposed on the upper surface of the movable contact spring 17 placed on the first central fixed contact 11. A flange 33 is formed on the outer periphery of the lower end of the second stem 26, and the hook 33 is engaged with the outer edge of the opening of the guide hole 27 to prevent the second stem 26 from coming off upward.

  The opening of the housing 10 is closed by covering the lid 34. An insertion port 35 having a width corresponding to the outer diameter of the skirt portion 28 of the first stem 25 is formed in the center portion of the lid body 34. By inserting the first stem 25 into the insertion port 35, the first The upper part of the stem 25 and the upper half of the second stem 26 are projected to the outside of the housing so as to be swingable. A side wall 10a is erected on the housing 10 so as to surround the outer periphery, and a lid 34 is attached to the upper end surface of the side wall 10a. The first stem 25 inserted through the insertion port 35 of the lid 34 attached to the housing 10 is prevented from coming out upward when the skirt portion 28 contacts the insertion port 35 at an angle. Further, since the skirt portion 28 of the first stem 25 has a shape opened downward, when the force in the tilting direction acts on the first stem 25, the inner peripheral portion of the insertion opening 35 of the lid 34 is the skirt portion 28. Since it slides on the taper surface, it does not hinder the swinging operation.

  FIG. 3 is a top view showing a formation pattern of the central fixed contacts 11 to 15 and the peripheral fixed contacts 16 arranged in the housing 10. Each of the central fixed contacts 11 to 15 is independent from each other, but the peripheral fixed contact 16 is constituted by one continuous contact formed around each of the central fixed contacts 11 to 15. Terminals 36a, 36b, 36c, 36d, and 36e for connection to the circuit board of the external device are respectively drawn out from the central fixed contacts 11 to 15 to the outside of the housing 10, and the terminal 37 is also connected from the peripheral fixed contact 16 to the housing. 10 is a common terminal drawn to the outside.

  FIG. 4 is a top view of the multi-directional input device shown in FIG. 1A with the lid 34 removed. The housing 10 has a shape in which the upper surface opening is formed by rounding four squares. The holding member 24 has an outer shape matched with the upper surface opening of the housing 10 and has a square shape with rounded corners. That is, the holding member 24 is fitted into the opening of the housing 10 leaving a slight gap. For this reason, the holding member 24 is mechanically positioned with respect to the housing 10. Further, even if a rotational force is applied to the holding member 24, the side wall of the holding member 24 comes into contact with the inner surface of the side wall 10 a of the housing 10 to restrict the rotation of the holding member 24. On the other hand, an opening 38 having a substantially positive shape and rounded four corners is formed at the center of the holding member 24. The four pressing pieces 29, 30, 31, and 32 of the first stem 25 are inserted into the four corners of the corresponding opening portions 38 and mechanically positioned. That is, when the first stem 25 is inserted into the opening 38 of the holding member 24, the first stem 25 is positioned with respect to the contact portion of the housing 10. In the state where the first stem 25 is positioned by the holding member 24, as shown in FIG. 1, the four pressing pieces 29 to 32 of the first stem 25 respectively correspond to the movable contact springs 18 to 18 so as not to impair the click feeling. The lower end of the second stem 26 is positioned on the movable contact 17. Moreover, even if a rotational force is applied to the first stem 25, the pressing pieces 29 to 32 are respectively fitted into the four corners of the corresponding opening 38, so that the rotation is completely restricted by the first stem 25. become.

  Next, an assembly operation of the multidirectional input device according to the present embodiment will be described with reference to FIG. The outer peripheral edge of the movable contact spring 17 is placed on the peripheral fixed contact 16 a so that the movable contact spring 17 is disposed on the first central fixed contact 11 of the housing 10. In this example, three movable contact springs 17 are stacked. The repulsive force is adjusted by the number of the movable contact springs 17 superimposed so that an appropriate click feeling can be obtained. Similarly, each movable contact spring 18, 19, 20, 21 is arranged on the second center fixed contact 12, the third center fixed contact 13, the fourth center fixed contact 14, and the fifth center fixed contact 15. The movable contact springs 18, 19, 20, and 21 are placed. Each movable contact spring 18, 19, 20, 21 is used in an overlapping manner. Next, the dust-proof member 22 that covers the movable contact springs 17 to 21 is placed. In this example, the dustproof member 22 having the adhesive portion 22a is used. The adhesive portion 22 a of the dustproof member 22 is bonded to the step portion 23 of the housing 10. Thus, even before the dust-proof member 22 is pressed by the holding member 24, the peeling or lifting is eliminated. Next, the holding member 24 is fitted into the housing 10 so as to suppress the outer peripheral portion of the dust-proof member 22. The holding member 24 abuts on the step portion 23 of the housing 10 and sandwiches the outer peripheral portion (including the adhesive portion 22 a) of the dustproof member 22 between the holding portion 24 and the step portion 23. As a result, the dust-proof member 22 is not only fixed by the adhesive portion 22 a but also fixed to the housing 10 by the holding member 24. Next, the second stem 26 is inserted into the guide hole 27 of the first stem 25, and the combined stem is inserted from the opening 38 of the holding member 24. At this time, as shown in FIG. 4, if the four pressing pieces 29 to 32 of the first stem 25 do not coincide with the four corners of the opening 38 of the holding member 24, the stem is fitted into the opening 38 of the holding member 24. It is not possible. Then, by fitting the four pressing pieces 29 to 32 of the first stem 25 so as to coincide with the four corners of the opening 38 of the holding member 24, the stem is positioned with respect to the contact portion of the housing 10. Next, the first stem 25 and the second stem 26 are inserted through the insertion opening 35 of the lid 34, and the lid 34 is attached to the opening of the housing 10. When the lower surface of the lid 34 comes into contact with the upper end surface of the housing side wall 10a, the inner peripheral edge portion of the insertion port 35 touches the outer surface of the skirt portion 28 of the first stem 25 lightly. A pair of engaging pieces 39 are provided on two opposing sides of the lid 34, and a hole 39 a is formed in the engaging piece 39. Further, bent pieces 41 are formed on the remaining two sides of the lid 34. On the other hand, a protrusion 42 that is engaged with the hole 39a is provided on the outer peripheral surface of the housing side wall 10a. Then, the engaging piece 39 is bent to engage the protrusion 42 with the hole 39a, and the bent piece 41 is bent along the upper end of the housing side wall 10a. The assembly of the multidirectional input device is completed by the above operation.

Next, the operation of the multidirectional input device configured as described above will be described.
FIG. 1A shows a state where the stem is in a neutral position, and FIG. 1B shows a state where the stem is tilted in the arrow X direction from the state shown in FIG.

  When a force for tilting the stem in the arrow X direction is applied in the state shown in FIG. 1A, the first stem 25 is supported by the second stem 26 and supported by the insertion port 35 of the lid 34. Swings in the direction of arrow X. As a result, the pressing piece 29 in the tilting direction presses the movable contact spring 18 from above the dust-proof member 22. When the movable contact spring 18 is pushed downward to some extent, the movable contact spring 18 comes into contact with the second central fixed contact 12 by reversing at a certain point and warping in the opposite direction. When the movable contact spring 18 is reversed, the operator can obtain a click feeling. Due to the reversal of the movable contact spring 18, the second central fixed contact 12 and the peripheral fixed contact 16 become conductive, and a switching signal appears at the terminal 36d. Then, the switching signal obtained in this manner is read and discriminated by a microcomputer on a circuit board (not shown) connected to the terminals 36a, 36b, 36c, 36d, 36e and the common terminal 37, thereby determining the stem. The operation direction can be detected.

  At this time, since the dustproof member 22 is pressed against the housing 10 by the holding member 24, the dustproof member 22 can be prevented from being pulled by being pulled by the stem. In addition, since the sheet outer peripheral edge applied to the step portion 23 is pressed, the adhesive portion 22a (adhesive margin) can be reduced, and the size in the width direction can be reduced.

  If the force for tilting the stem in the direction of the arrow X is released, the pressing piece 29 is pushed back by the restoring force of the movable contact spring 18 to return the stem to the initial state. Even when the stem is tilted in the direction other than the arrow X direction, the movable contact springs (19 to 21) in the tilt direction are reversed by the corresponding pressing pieces (30, 31, 32) and are turned back to the opposite side. To contact each central fixed contact (13, 14, 15). As a result, the central fixed contacts (13, 14, 15) and the peripheral fixed contacts 16 become conductive, and a switching signal appears at the corresponding terminals 36 (b, c, e). When the second stem 26 is pressed downward (center push), the second stem 26 slides downward in the guide hole 27 against the elastic force of the movable contact spring 17 to move the movable contact spring from above the dust-proof member 22. 17 is pressed. When the movable contact spring 17 is pushed downward to some extent, the movable contact spring 17 comes into contact with the first central fixed contact 11 by reversing and warping in the opposite direction at a certain time. As a result, the first central fixed contact 11 and the peripheral fixed contact 16 become conductive, and a switching signal appears at the terminal 36a.

  Here, in order to position the first stem 25 with respect to the contact portion of the housing 10, the side wall 10 a of the housing 10 is used without the holding member 24. Therefore, the tip end portion of the pressing piece (29 to 32) of the first stem 25 is originally extended to the vicinity of the side wall 10a of the housing 10. However, when the distal end portion of the pressing piece (29 to 32) of the first stem 25 is extended, the distal end portion and the stepped portion 23 and the like interfere with each other to prevent the swinging operation of the stem. In this embodiment, since the first stem 25 is positioned by the holding member 24 instead of the side wall 10a of the housing 10, it is not necessary to extend the distal end portion of the pressing piece (29 to 32), so that the first stem 25 can be shortened. The tilt angle can be increased without hindering the swinging motion of the stem.

  According to the present embodiment configured as described above, since the dustproof member 22 that covers the contact portion disposed inside the housing 10 is provided, the joint between the lid 34 and the housing 10, the first stem 25. Even if dust enters the housing from the contact portion between the guide hole 27 and the second stem 26 and the contact portion between the insertion opening 35 of the lid 34 and the first stem 25, the dust-proof member 22 blocks the dust. It is possible to prevent the contact portion from causing malfunction due to dust. Further, since the stem is positioned by the holding member 24 that holds the dust-proof member 22, the tilt angle can be increased without hindering the swinging motion of the stem.

(Embodiment 2)
FIG. 5 is a sectional side view of the multidirectional input device according to the second embodiment. A plurality of central fixed contacts 41, 42, 43 and the like are disposed on the bottom surface of the housing 40, and a peripheral fixed contact 44 is disposed around the central fixed contacts. Movable contact springs 45, 46, 47, etc. are placed on the respective central fixed contacts 41, 42, 43, etc. Each central fixed contact and the corresponding movable contact spring constitute a contact portion. The configuration up to this point is the same as that in the first embodiment.

  In the second embodiment, the dustproof member 48 is provided on the entire bottom surface of the housing and the inner surface of the side wall of the housing including the contact portion along the bottom surface and the inner surface of the side wall. The dust-proof member 48 is desirably a flexible sheet that does not hinder the sense of operation of the contact portion. The outer edge 48a of the dustproof member 48 is sandwiched between the upper surface of the side wall 40a of the housing 40 and the lid 50, thereby preventing foreign matter (including dust) from entering the dustproof member 48. As a result, a sufficient dustproof effect can be expected without providing an adhesive portion on the dustproof member 48.

  The stem has a double stem structure including a first stem 51 for swing input and a second stem 52 for center push. The first stem 51 has a guide hole 53 penetrating in the vertical direction at the center, and the second stem 52 is inserted through the guide hole 53.

  FIG. 6 is a top view of the multi-directional input device shown in FIG. 5 with the lid 50 removed. The opening formed in the housing 40 is substantially square and has four corners bulging outward in a semicircular shape. On the other hand, an outwardly extending skirt portion 51 a is formed at the center of the first stem 51, and the tip end portion of the skirt portion 51 a extends in the horizontal direction and has four semicircular portions similar to the opening of the housing 40. 54a, 54b, 54c and 54d are integrally formed. The four semicircular portions 54 a, 54 b, 54 c, 54 d of the first stem 51 are fitted into the opening of the housing 40, thereby achieving the function of preventing the rotation of the first stem 51 and the second stem 52 and the positioning function. A dustproof member 48 is sandwiched between the outer peripheral portion of the first stem 51 including the semicircular portions 54 a, 54 b, 54 c and 54 d and the opening of the housing 40. For this reason, the opening of the housing 40 and the outer peripheral shape of the first stem 51 are similar, but the size of the first stem 51 is reduced by an amount corresponding to the thickness of the dust-proof member 48. Further, the outer edge 48 a of the dust-proof member 48 is bent on the opening edge of the housing 40. Therefore, if the lid 50 is attached so as to close the opening of the housing 40, the outer edge 48 a of the dust-proof member 48 is sandwiched between the opening edge of the housing 40 and the lid 50. In addition, projections 55a to 55d for pressing the corresponding movable contact springs 46 to 49 are provided on the lower surfaces of the semicircular portions 54a to 54d, respectively. Each of the protrusions 55a to 55d is set to be positioned directly above the corresponding movable contact springs 46 to 49 when the stem is positioned. A terminal 56 for outputting the conduction state of the contact portion is drawn out on the side surface of the housing 40.

  In the multi-directional input device configured as described above, when the swing operation for tilting the stem in an arbitrary direction is performed, for example, when tilting in the arrow Y direction shown in FIG. 5, the semicircular portion 54 a of the first stem 51 is moved downward. The protrusion 55a is displaced and presses the movable contact spring 46. The movable contact spring 46 is reversed by pressing, and gives a feeling of clicking to the operator so as to contact the center fixed contact 42. As a result, a signal indicating the conduction state is output from the corresponding terminal 56.

  According to the configuration of the second embodiment, the outer edge portion 48a of the dustproof member 48 is sandwiched and fixed between the opening edge portion of the housing 40 and the lid body 50, so that the adhesive portion is attached to the outer peripheral edge portion 48a of the dustproof member 48. Even if it does not form, it can prevent that a foreign material penetrate | invades from the clearance gap between the dust-proof member 48 and the housing 40. FIG.

  The present invention is not limited to Embodiments 1 and 2 above, and can be implemented with various modifications. For example, in the first and second embodiments, multi-directional input in four directions and in the pushing direction is described, but the present invention is similarly applied to multi-directional input other than the four directions and in the pushing direction. can do. In addition, various modifications can be made without departing from the scope of the object of the present invention.

(A) is the multidirectional input device which concerns on Embodiment 1, and a stem is a sectional side view in a neutral position, (b) is the multidirectional input device which concerns on Embodiment 1, and a stem is It is a sectional side view at the time of tilting. 1 is an exploded perspective view of a multidirectional input device according to Embodiment 1. FIG. It is a bottom top view of the housing shown in FIG. It is a top view of the state which removed the cover body from the multidirectional input device shown in FIG. 1 is a side sectional view of a multidirectional input device according to Embodiment 1. FIG. It is a top view of the state which removed the cover from the multidirectional input device shown in FIG. It is a sectional side view of the conventional multidirectional input switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Housing 11 1st center fixed contact 12 2nd center fixed contact 13 3rd center fixed contact 14 4th center fixed contact 15 5th center fixed contact 16 Peripheral fixed contact 17-21 Movable contact spring 22 Dust-proof member 23 Step part 24 Holding Member 25 1st stem 26 2nd stem 27 Guide hole 28 Skirt part 29-32 Pressing piece 33 Gutter part 34 Cover 35 Insertion port 36 Terminal 37 Common terminal 38 Opening part 39 Engagement piece 48 Dust-proof member

Claims (11)

  A housing that is open at one side and has a contact portion on the bottom; a stem that is housed in the housing so as to be swingable; a dust-proof member that is disposed between the contact portion and the stem and covers the contact portion; A multidirectional input device comprising: a holding member that holds a dustproof member; and a lid that covers the housing opening and projects the operation end side of the stem from the insertion port to the outside of the housing.   The holding member positions the stem so that a pressing end portion provided at a lower end of the stem is arranged at a position where the contact portion can be pressed when the stem is assembled in a housing. Item 4. The multidirectional input device according to Item 1.   The multi-directional input device according to claim 1, wherein the holding member has a rotation preventing portion that engages with a swinging end portion of the stem and restricts rotation.   The multidirectional input device according to any one of claims 1 to 3, wherein the holding member is provided along an inner wall of the housing, and a dustproof portion is formed at a contact portion between the holding member and the inner wall of the housing. .   The multidirectional input device according to claim 1, wherein the dustproof member is formed of a flexible sheet.   The multi-direction according to any one of claims 1 to 5, wherein the dust-proof member is made of a sheet with an adhesive material in which an adhesive part is formed on an outer edge part, and adheres the adhesive part to an inner wall of the housing. Input device.   The multidirectional input device according to any one of claims 1 to 6, wherein an outer edge portion of the dustproof member is pressed against an inner wall of the housing by the holding member.   A housing having a contact portion on the bottom surface, one of which is open, a stem accommodated in the housing so as to be swingable, and a housing bottom surface and a housing side wall disposed between the contact portion and the stem and including the contact portion A dust-proof member that covers all of the inner surface, a cover that covers the housing opening and projects the operation end side of the stem from the insertion port to the outside of the housing, and sandwiches the outer edge of the dust-proof member between the housing opening, A multidirectional input device comprising:   The multi-directional input device according to claim 8, wherein the dust-proof member has a rotation preventing portion that engages with a swinging end portion of the stem and restricts rotation.   10. The structure according to claim 1, wherein the contact portion has a structure in which a fixed contact formed on a bottom surface of the housing and a movable contact spring placed on the fixed contact and reversed by pressing are combined. A multi-directional input device according to claim 1.   The multidirectional input device according to any one of claims 1 to 10, wherein the stem has a double stem structure of a first stem for swing input and a second stem for center push. .

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